How to Choose the Right Ski Pants?

 No matter if you are zipping down the mountain on fresh powder or gliding over snow-covered terrain, you’ll want to wear the right ski outfit. While having a ski jacket, gloves and hat are important, don't overlook your ski pants.

A good pair of ski pants will help keep you warm and dry on the mountain. Pro Tips breaks down key features to look for in ski pants that can help keep you comfortable on the slopes.

 

 

SKI BIB VS. PANTS 

There are two distinct pants to choose from: regular pants and bibs. The choice will come down to personal preference.

● Regular ski pants fit like a pair of everyday pants. They come with a zip fly or an elastic waistband. One drawback is that you may end up with snow in your pants if you take a spill on the slopes.

● Bibs are like overalls and are secured to your body by a pair of suspenders. They also have extra fabric that extends over your waist and chest. This can provide extra warmth and help keep your pants in place. While bibs can limit snow in your pants, they can also be difficult to remove when nature calls.

 

SKI PANT INSULATION

You’ll want to choose a pair of ski pants that will keep you warm on the slopes. There are various levels of insulation in ski pants. Your choice will often come down to how cold your legs get while skiing.

● Insulated ski pants have synthetic insulation to offer the most warmth of all the options.

● There are also uninsulated pants that feature a small lining for additional warmth. This can be popular with skiers who prefer to layer their lower bodies.

● Unlined ski pants have no insulation and can be a good choice for backcountry skiing.

 

 

WATER PROTECTION

Keeping you dry is key for any winter outerwear, especially ski pants. You’ll have several levels of water protection to choose from. Fully sealed seams and moisture-wicking fabrics can provide high levels of moisture protection.

Most ski pants feature a waterproof rating somewhere between 5,000 and 20,000. The higher the number, the more water-resistant a pair of pants will be.

Don’t forget to check out the seams of your pants. This will help boost the level of water protection for your ski pants.

● Fully taped means there is a waterproof material sealed over the edges of seams.

● Critically taped will feature waterproof material only over seams regularly exposed to moisture.

● Welded ski pants have two fabrics bonded together. These tend to be the lightest and highly waterproof.

How to deal with the defects of laser welding machine

With the continuous innovation of laser welding machines, more and more general-purpose equipment suitable for popularization appears. In the future, laser welding machines may enter thousands of households like electric welding machines and become a common equipment. Unlike all welding, laser welding There are certain advantages and techniques to prevent and reduce the disadvantages of welding.

 

 

Cracks:

The cracks that occur in laser welding are mainly thermal cracks, crystallization cracks, liquefaction cracks, cracks caused by impurities and foreign matter, etc. The main reason for the occurrence is that the welding seam has a large shrinkage force before it is completely solidified. Wire filling, preheating , and other methods can reduce or eliminate cracks.

 

Porosity:

Porosity is a disadvantage that easily occurs in laser welding. The molten pool of laser welding is deep and narrow, and the cooling rate is fast. The gas generated in the liquid molten pool does not have sufficient time to escape, which easily leads to the formation of pores. However, laser welding cools quickly, and the porosity that occurs is generally smaller than that of traditional fusion welding.

Solution: Cleaning the surface of the workpiece before welding can reduce porosity, inert gas protection can reduce metal oxidation reaction to inhibit the occurrence of porosity, and the laser blowing point of view and the welding bead maintain an included angle of 30-45 degrees, and do not block light and do not connect with the fixture. In the case of bumping, it is better to be close to the weld bead.

 

Spatter:

The spatter generated by laser welding seriously affects the surface quality of the weld, and will contaminate and damage the lens. The important factor of spatter is proportional to the focal length of the laser and has a direct relationship with the power density.

Solution: The selection of different welding parameters requires re-adjustment of the welding focus. The focus can be changed in turn, and the welding power can be reduced to reduce spatter. When the penetration is insufficient and the power is equal, the welding speed can be reduced to achieve the purpose of increasing the penetration.

We also supply other Laser Marking Machine, more please contact us.

Explaining the similarities and differences between a road bike and a mountain bike

 Amongst the most popular types of bicycles, there is hardly a starker contrast than from road bike to mountain bike. Their frames look completely different, one has fat tyres while the other has skinny ones, the handlebars are vastly different shapes, and… is that suspension?

 

There are more differences between road bikes and mountain bikes than there are similarities, yet they are two of the most popular styles of bikes. Many riders crossover and ride both (not at the same time), and there are even professional riders who compete in explosive cross-country mountain biking and six-hour road races. In this article, we’re going to dive into the similarities between road bikes and mountain bikes, and why you might choose one over the other.

 

There’s a lot more to it than the shapes and components themselves, but let’s start with the most basic question: when would you ride a road bike versus a mountain bike?

 

Purpose of road bikes and mountain bikes

Road bikes are designed for all sorts of paved-surface riding. That means city streets, country lanes, cycle paths, mountain passes, and more. These bikes are lightweight and aerodynamic, designed to be fast in a straight line but also fast uphill. Their frame geometry, components, and handlebar shape lend them to being fast – and you’ll never want to take your road bike off-road.

 

Road Bicycle

Road Bicycle

Mountain bikes are designed for off-road riding, almost the opposite of road bikes. The thick tyres and treads on mountain bikes make them extremely slow on tarmac, as if the heavy frame wasn’t slowing you down enough, though they're perfectly suited to helping you stay upright on rocky, muddy singletrack trails. The flat handlebars and suspension systems on mountain bikes are meant to increase handling and improve comfort off-road, and especially on steep and technical singletrack. A mountain bike’s frame geometry is designed to help cushion blows and improve balance over bumpy sections, along with powerful disc brakes and massive gearing ranges for all sorts of off-road terrain.

 

Mountain Bicycle

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Frame geometry

Beginning with the frame itself, the best road bikes are designed to be compact and aerodynamic compared to mountain bikes which are designed to be stable over rough ground. A road bike will have a relatively long reach and top tube compared to a mountain bike, which helps the road rider stretch out into an aerodynamic position while riding.

 

You will also find differing fork offset (also known as the fork 'rake') which is the distance between a straight line through the fork’s steerer tube and a vertical line through the front hub. Road bikes have a short rake, which results in a steep fork and snappy handling, while a mountain bike will usually have a larger fork rake and a slacker head tube angle which keeps the rider’s centre of gravity balanced on steep descents. This aspect effectively moves the front wheel further out in front of the frame, improving leverage and control on a mountain bike.

 

Mountain bikes have a shorter reach and top tube than road bikes, which keeps the handlebars closer to the rider for improved handling. This also creates a more upright – and less aerodynamic – position on a mountain bike, but one that is better for tight corners, off-road handling, and keeping your centre of gravity low and central.

 

Lastly, we have trail, which is a complicated measurement combining the head tube angle with the fork rake, resulting in the difference between the tyre contact point and the steering axis. All you need to know is this: a road bike will typically have a steep head tube and larger fork offset to lower trail and quicken handling. Supanda mountain bikes typically have larger trails which improve stability and are better for high-speed handling on rough terrain.

 

Gearing and brakes

Most mountain bikes these days come with a 1x set-up, which means that there is just one front chainring. This decreases the chances of the chain coming off, and eliminates the need for a heavy, expensive, and finicky front derailleur. With only one front chainring and extremely steep terrain to tackle, mountain bikes need a massive rear cassette with a wide gearing range. Some cassettes have earned the name ‘dinner plate’ for their massive size, sometimes going all the way up to a 50t rear cog. Manufacturers are now making 11-speed and 12-speed mountain bike cassettes from a 10t cog to a 50t and larger, so even with a 1x set-up, you can achieve a huge range of gearing for steep singletrack climbs and fast descents.

 

There are a lot more options when it comes to road bike gearing, including compact and race-ready set-ups. Most road bikes are 2x set-ups, which means they have two front chainrings and a front derailleur, with the classic setups being a 53/39, 52/36 or 50/34. Most road cassettes are 11-speed with a range from 11 to 28-tooth sprockets, although many riders are opting for even bigger options to help over steep climbs.

 

Many road cyclists, especially recreational, go with a compact chainring set-up which uses smaller front chainrings and larger rear cogs. This limits you on the upper-end (at high speeds), but it allows you to keep pedalling at a comfortable cadence on ultra-steep climbs. With a compact chainring setup, you could still be pedalling at 80rpm up a nine-per cent grade.

 

When we start thinking about brakes, there is only one answer for mountain bikes: disc brakes. Big, powerful, and high-performing in the wet, disc brakes are simply the best for off-road riding. Disc brakes also allow for more tyre clearance, which is best for mountain bikes that have wide and knobbly tyres. For downhill riding and extreme mountain biking, riders use disc brakes that are larger than normal, which help increase stopping power and performance and high speeds.

 

After decades of being outfitted with rim brakes, most road bike manufacturers have acknowledged the benefits of disc brakes on road bikes, and have begun including them on all of their road models. While many were sceptical because of the weight, aerodynamics, and safety, technology seems to have caught up with the concern, and disc brakes are now a mainstay on road bikes.

 

You can still find road bikes with rim brakes, which are typically lighter than disc brakes but they struggle to perform as well in wet weather. There is also no modulation to rim brakes, and they are less powerful overall. Many riders who go with rim brakes choose them for their convenience and affordability. Most bike technology (trainers, car racks, bike stands) is set up for rim brake bikes, which are also easier to set up and service compared to disc brakes.

 

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Wheels and tyres

Mountain bike tyres are wider and larger than those found on road bikes, which makes them stronger and more durable on rough terrain. Designed to handle rocks, roots, and ruts, mountain bike wheels and tyres are made to be durable and grippy on uneven ground. Their tyres are also puncture-resistant, with puncture-protected sidewalls and thick tread patterns.

 

Tread patterns on mountain bikes are thick and bulky, designed for a specific type of mountain bike riding. Race tyres will be much different to big mud tyres, while downhill tyres will be different to cross-country mountain biking tyres. Those differences don’t really exist in road tyres, at least when it comes to the tread patterns. Road tyres are mainly slicks, with very little tread apart from shallow grooves around the tyre.

 

The best road bike tyres are significantly narrower than mountain bike tyres, and measured in millimetres (mm) rather than in inches (in) used for mountain bike tyres. Starting at 21mm wide, you can find road tyres all the way up to 38mm wide, but that is still significantly narrower than the narrowest mountain bike tyres, which start at around two inches.

 

Road bike tyres are also designed to be run at much higher tyre pressures, usually between 50 and 100psi. The larger size of mountain bike tyres makes them able to run at low pressures (20-35psi) which also means better performance on rough and wet terrain.

 

Suspension

Suspension is one of the most unique aspects of a mountain bike, and one that you will rarely find on a road bike. There are two kinds of mountain bikes, designated by their suspension systems: hardtail and full suspension. Hardtail mountain bikes include only front suspension, which is usually in the fork. These systems usually have 100-170mm of travel, and are more rigid than full-suspension mountain bikes. Hardtail mountain bikes are much lighter than full-suspension bikes too, which makes them ideal for cross-country and short track mountain bike racing.

 

Full suspension mountain bikes have both front and rear suspension, which improves overall comfort and handling over rough and technical terrain. These bikes are significantly heavier and more expensive than hardtail mountain bikes, but they perform much better on rough trails. Full suspension mountain bikes can have anywhere from 100-200mm of travel, making them ideal for all sorts of trail riding, downhill mountain biking and racing.

 

Handlebars

One of the biggest differences between a road bike and a mountain bike is its handlebars. Road bikes have drop bars, which are curved sets of handlebars that offer three different hand positions for riding: the hoods, drops, and tops. The brake and shift levers are located on the hoods, which is the most common hand position for road cycling. Riders use the drops for descending, sprinting and racing, while the tops are used for climbing and casual riding.

 

Mountain bikes use flat handlebars that extend from left to right across the front of the bike. There is only one riding position on flat mountain bike handlebars, and that is with your hands on either side of the flat bar. The shift and brake levers are located at the end of each side of the bar, making them easy to reach with just a finger or a thumb.

 

Flat bars are wider than drop bars, which – along with their style – helps improve leverage and handling in tight corners. For steep and tight single-track corners, flat bars are far superior to drop bars.

 

Riding position

The differences between a road cycling position and a mountain biking position are massive. On a road bike, you’ll be stretched out with a longer reach, closed hip angle and forward-leaning position. While on a mountain bike, you’ll be seated in a much more upright position thanks to a short reach, slacker head tube angle, and flat handlebars. The wide tyres and suspension will keep you more comfortable on rough terrain, and you won’t have to worry much about the aerodynamics on a slower mountain bike ride.

 

Supanda road bikes have a more relaxed geometry that is less aerodynamic but more comfortable for the long haul. These are the bikes designed for all-day adventures, using a more upright position to save your back and your arms, while also keeping many of the same road bike features that make them fast and fun.

 

How to choose

This one is simple: are you riding on-road or off-road? Road bikes are meant for the road, while mountain bikes are not. If you’re riding on mixed terrain, then one of the best gravel bikes is probably your best option. When shopping for a new bike, keep in mind the differing frame geometry and your needs as a rider.

 

Comfortable frame geometry usually means slower, and the same goes for off-road features of mountain bikes including wide and knobbly tyres, suspension, and flat bars. Both bikes have their place in cycling, and you’ll be able to find the perfect fit no matter your preference.

 

Supanda is a Road Bicycle factory in China and also a leading wholesale supplier of mountain bikes in China. Contact us now.

Types and Uses of Plug Gauges

 Plug gauges are available in several different types. These include:

Go plug gauges

No-go plug gauges

Combination go/no-go plug gauges

Go plug gauges and no-go plug gauges are called single-ended gauges and consist of a handle into which a precisely machined pin or shaft has been inserted (sometimes called a member) and which is used to verify an aspect of the dimensional tolerances of the hole. For single-ended gauges, they are usually offered in pairs with one go gauge and one no-gauge gauge.

In its use, a go plug gauge is designed to test the minimum dimensional limit of the hole (i.e. the lower tolerance of the hole’s diameter) which represents the maximum amount of remaining material on the part or workpiece. For an acceptance condition, the go plug gauge should fit in the hole. If the go plug gauge will not fit into the hole in the workpiece, then that is an indication that the hole’s diameter is too small (an insufficient amount of material has been removed from the workpiece) and the part needs to be rejected.

For a no-go plug gauge, its purpose is to validate the maximum dimensional limit of the hole (the upper tolerance of the hole’s diameter) which corresponds to the minimum acceptable amount of material remaining on the part or workpiece. For the part to be accepted, the no-go plug gauge should not fit into the hole. If the no-go plug gauge did not fit into the hole, then this is an indication that the hole’s diameter Is below the upper limit and the part can be accepted (provided that the go plug gauge did fit into the hole). If however, the no-go plug gauge fits into the hole, then that is an indication that the hole’s diameter is too large (i.e. beyond the upper tolerance limit that was specified), meaning that too much material was removed during the machining operation, and therefore the part must be rejected. Table 1 below summarizes these conditions and the resulting accept/reject status of the part.

In a combination go/no-go plug gauge (also called a double-ended plug gauge), the gauge handle has a go plug gauge extending outwards from one side of the handle and a no-go plug gauge extending outwards from the opposite side. This simplifies the use of the tool and allows for increased speed in the inspection process. In some models, the handle may be color-coded with the go side painted with green paint and the no-side painted with red paint. Even without color-coding, for plug gauges, the go plug gauge can always be distinguished from the no-go plug gauge by two observable conditions:

The go plug gauge is always smaller in diameter than the no-go plug gauge, and

The go plug gauge is always larger in width (thickness) than the no-go plug gauge

Plug gauges provide fast results and have the advantage that users can be easily trained on their use as plug gauges rely on a simple working principle. As a result, no strong knowledge of scientific methods and metrology is needed, making training simpler and open to a wider pool of users. Their simplicity also means that they are inexpensive relative to other forms of measuring instruments.

One drawback of plug gauges is that through use they tend to wear out over time and therefore require replacement. They should also be checked periodically to assure that they are still within tolerance.

Plug gauges that are used for the accept/reject screening of parts are called working gauges.

Rich Treasure Precision is pleased to deliver Pin Gauge, Ceramic Plug Gauge. Safe payment and on time deliver time will give you.

Armoured Cable vs. Unarmoured Cable

 

With the rapid development of optical communication, more and more fiber optic cables are increasingly used in different environments. What if under harsh conditions? Then it's crucial to ensure your cables smooth and reliable operation when transmitting data. This is where armoured cable comes into play. An armoured cable, as its name suggests, is protected against mechanical damage, whereas an unarmoured cable not being protected. What is the difference between them? And why should we choose armored cable over unarmoured cable? You my find answer in this post.

 

Amoured Cable Overview

 

Armoured cable has an extra layer of protection to keep it from being cut or abraded. The armor layer of coax cable is a foil wrap that is ribbed like corrugated metal to allow for flexibility, around the inside and outside of that wrap is a flooding compound to keep moisture from penetrating the cable and causing an impairment. The internal structure of 4 core armoured cable consists of many layers to prevent the cable from damage. The outer jacket provides protection against rodent, abrasion and twist, which is usually made of plastic. And the armoring materials are mainly come from kevlar, steel, and aluminum foils, aiming to protect the armored cable from being stretched during installation.

 

Unarmoured Cable Overview

 

 

Unarmoured cables are cables without a protective layer of steel armor. The insulation performance of the cable is very important to ensure the safe operation of the power supply system, so it is necessary to detect the insulation performance of the cable and find the potential defects of the cable as early as possible. Most of the current research is focused on armored cables, but few people have studied the insulation testing methods of unarmored cables. The insulation testing methods used mainly include partial discharge method, fiber optic temperature measurement method, leakage current method, etc.

 

 

Difference Between Armoured Cable And Unarmoured Cable

 

Structure

Many people may think that armoured cable just has metal protection. To be precise, the armoring material doesn't have to be metal, it can be fiber yarn, glass yarn, polyethylene etc. The only thing that makes armored cable different from unarmored cable is that the former has an additional outer protective layer for optical cable. The 4 core armoured cable tends to be more expensive than unarmored cable, while the armoured cable with steel strip and aluminum is much cheaper than armored fiber cable with Kevlar, which is usually used for special occasions.

 

Application

Armoured cable is installed in locations exposed to mechanical damage, such as on the outsides of walls, as an alternative to conduit. Armoured cable usually has a small metal ribbon to ensure electrical continuity of the safety ground. (You must run a separate ground wire in flexible conduit too; you can't depend on the continuity of the conduit.) In HT & LT distribution, 4 core armoured cable is preferred. Inside walls and in other protected locations, less expensive unarmored electrical cable can be installed instead. Unarmoured cable is mainly used for control systems.

Why Should Use Armoured Cable Over Unarmoured Cable?

 

There are a couple of reasons that armoured cable should be used. The biggest reason is about strength, because armored cable was used more extensively in past decades when cable was simply directly buried under dirt and not used through a conduit. Nowadays most local municipalities require conduits to be trenched in prior to installing network components, thus eliminating the need for unarmored cable in most applications. Secondly, rodents or animals can and will chew through cables so the armor protects the cables from damage by animal or shoveling in direct bury applications. Thirdly, the most uncommon reason it would be used is in an RF environment that has an off air RF signal that is powerful enough to interfere with your network, the armor when grounded can provide another layer of RF protection.

 

Conclusion

 

Armoured cable can be regarded as a kind of strengthened cable, which is harder and stronger than standard optical cable. With an unparalleled protection against physical damage without sacrificing flexibility or functionality within fiber networks, 4 core armored cable is a perfect addition to any fiber network in hazardous environments. Instead, less expensive unarmored electrical cable can be installed inside walls and at other protected locations. Unarmoured cable is used primarily for control systems. We are an armoured cable & unarmoured cable supplier. If you are interested in our products, please contact us now!

 

Common knowledge sharing

 Precision molding is the latest technology in the field of plastic injection molding. Precision molding is a type of plastic molding that is the most expensive and complex mold design process on the market.

 

Injection molding companies have never used the precision molding process for the entire product development process. It is only used in small, rare instances in the manufacturing process when product development requires an exceptionally precise form of plastic injection molding.

 

About Precision Molding

As mentioned earlier, precision injection molding is a highly technical process that requires the use of precision molds and precision machinery. The precision molding process is different from traditional injection molding technology. The process is necessary to develop precision plastic parts with complex geometries that can replace high-precision metal parts in a variety of industrial applications.

 

The precision of the parts depends to a large extent on the precision injection mold and its suitability to meet the engineering requirements of the design.

 

Related news:What Are The Requirements For Injection Molding Machines For Precision Injection Molding?

The concept of precision injection molding

Precision injection molding is a method of injection molding that is difficult to meet the requirements of injection molding machines and conventional injection molding processes. The concept of precision injection molding is mainly different from "conventional injection molding". It is based on the rapid development of polymer materials and the replacement of high-precision metal parts with precision plastic parts in the field of instruments and electronics.

 

At present, there are two objectives in defining precision injection molded products.

 

One is the repetitive accuracy of product size, and the other is the repetitive accuracy of product quality.

 

In this paper, we mainly describe precision injection molding from the repetitive accuracy of product dimensions. However, the precision of plastic parts cannot be equated with the precision of metal parts due to the different properties of various materials and processing processes. The mold of the molded product is an important condition to decide whether the product can meet the design requirements of precision injection molding.

 

Features of precision injection molding

A. High precision of parts, small tolerance, i.e. high precision dimensional limit.

B. High product requirements, requiring daily, monthly and yearly dimensional stability. 

C. Good mold rigidity, high cavity size accuracy, finish and positioning accuracy between templates.

D.Adopt a precision injection molding machine instead of a conventional injection molding machine.

E. Adopt precision injection molding process.

F. Use materials that are suitable for precision injection molding.

 

The most important technical index for evaluating products is the precision of injection molding products (dimensional tolerance, geometric tolerance and surface finish of products). The injection molding of precision plastic products must strictly control four factors: material selection, mold design, injection molding process, and operator's technical level. Precision injection molding machine for product precision requirements within 0.01 ~ 0.001mm, many precision injection molding machines also require injection molding machine for injection pressure, injection speed requirements are high; the clamping system has sufficient rigidity and high precision clamping, the so-called clamping accuracy refers to the clamping force is uniform and adjustable, stable and repeatable high precision, the high position accuracy of the mold.

 

Factors affecting the accuracy of product dimensions

Mold cavity size accuracy

Accurate position of the cavity

Parting surface accuracy

The choice of material

Dimensional tolerance of general precision mold

Number of cavities in mold design

The thickness of base plate, support plate and cavity wall

Size of runner

Precision mold material (preferably alloy steel with high mechanical strength)

Design engineering

 

Related news:Three Questions You Need to Consider before Choosing Precision Molding

How does precision molding work?

The process of molding plastics into specially priced and calculated shapes through CNC machining is called polymer optics.

 

As technology grows in precision and complexity, the world requires increasingly sophisticated processes for molding plastics into specific shapes used in specialized industries such as automotive, pharmaceutical, medical device, information technology, and other service industries.

 

The following are some additional tips from molding consultants on the precision molding:

 

a. This process is beneficial because it is more economically viable.

b. The process is also a new and greatly enhanced solution to the optical problems that arise in the contract manufacturing and scientific molding of technical products.

c. The custom injection molding process is not an appropriate method for developing the optical components needed for a variety of high-precision products. The precision injection molding process allows manufacturers to customize the process to meet the needs of the molded product.

d. The resulting research and development led to Precision Injection Molding (PIM) technology, which will allow molders to develop plastic devices at an affordable price, but with very high-quality control and precision.

e. Polymer optics in precision injection molding are key to developing high precision molds, giving the plastic injection molding development process a variety of unique advantages.

f. They are ideal for molding companies to produce products in large quantities at a low cost. Prior to PIM, these products had to be developed manually by molding experts and molding consultants. Now, these products have been developed on a large scale and with a high degree of precision.

g. The integrated optical and mechanical features are unique to this product and make it superior to other custom injection molding processes.

h. Lightweight design is a key feature of custom injection molded products. Low-weight optical polymers are half the density of glass, which allows for the development of low-weight designs. Lightweight optical polymers will remain between 5-30 euros per kilogram and are much cheaper than their alternatives.

i. The process does not require any additional steps and is always done in one simple step. This means that products can be developed more accurately and in a shorter period of time through contract manufacturing.

j. The cycle time of the process is slower than that of its counterpart. The process thus becomes more suitable for the high-volume production of molded materials.

k. The process also allows production in the injection molding machine in any design or shape without any additional fees or costs.

l. Glass optics and precision optics through polymers are sometimes combined to improve the accuracy of the product, as they allow the development of high image quality control within a reasonable cost.

 

Automation potential

The process is highly regarded for its potential in automating the process. The entire process is automated and carried out in all aspects by computer through automated processing systems. The advanced process allows for fluid and customizable manufacturing cells.

 

The process of precision tooling and design engineering is carried out through cells that can also be computer programmed for injection molding, coating, testing and even packaging.

 

The mechanical features of the process are highly customizable, wherein mechanical mountings such as lens mounts, snaps and various other fixtures can be easily installed or removed as needed.

 

Surface specifications

There are limitations to the practicality of precision molding due to manufacturing technology.

 

Polymer optics allow lens diameters from 1 mm to 100 mm, and lens thicknesses must remain between 1 and 30 mm. The ratio of diameter to thickness will remain between 1:1 and 5:1.

 

Other Important Considerations

When planning to create precision molded products, it is important to consider the following key criteria.

 

A. Selecting the area within the mold where precision is needed

As mentioned earlier in the article, precision molding is more complex and expensive than traditional plastic molding. That's why it's important to understand the different aspects of custom plastic parts and identify parts that require high tolerances.

 

It is also important to know if these tolerances can be managed through traditional injection molding techniques. Plastic parts can be manufactured using traditional plastic injection molding processes as well as precision molding. For example, an electronic part may require precision machining of only a small portion of the part rather than the entire part.

 

Therefore, understanding and determining the accuracy requirements will ensure a cost-effective solution that meets your needs. In addition, it will help ensure that your parts are prepared with high quality and meet production deadlines.

 

B. Selecting the right plastic material

Choosing the right plastic resin is an important factor in making the right precision-molded part. The choice of material is one of the biggest determinants of whether a plastic molded product will be produced as desired.

 

Among plastic materials, shrinkage range is one of the most important criteria for manufacturing high-precision parts. A narrow shrinkage range provides a better chance of achieving tight tolerances.

 

Again, shrinkage requirements depend on the product being produced. While a larger range of shrinkage is not desirable because it makes it difficult to achieve the correct level of tolerance, it can still be used to make products that do not require precise dimensions.

 

Polypropylene has a much wider shrinkage range of +/- 0.014 in. to +/- 0.022 in. Acrylonitrile butadiene styrene (ABS), on the other hand, has a narrower range, but still does not fall into the category of being suitable for precision molding needs.

 

Typically, the shrinkage range required to mold precision parts is about +/- .001" or +/- .002"

 

Therefore, choosing a plastic resin with low shrinkage is an easy way to make your material suitable for precision molding.

 

However, due to the high cost of the required resin, this may not always be a cost-effective option.

 

As a result, various molders prefer to achieve high tolerance levels by adding filler materials to the plastic resin. These include glass fibers, mica and other filler materials. The addition of fillers narrows the shrinkage range and thus provides better structure to the part.

 

C. Choosing the best mold maker 

Choosing the right precision molding company is another important factor in creating quality molded products. The key requirement for manufacturing precision molded plastic parts that have tight tolerances and are produced as exact replicas of each other is having high precision molds and tooling.WIT MOLD always insists to make high quality molds.

 

Therefore, it is important to choose a precision mold manufacturer that is proficient in high precision tooling and has a thorough understanding of the process. The availability of technology to manufacture precision molds for the production of identical parts is a very important criterion for the manufacture of precision molded plastic products.

 

WIT MOLD is a very professional mould design and mould maker located South of China, certified ISO2009:2015 international quality standard. We started to build the complete molds since 2011, specializing in manufacturing different types of injection moulds for exporting worldwide mainly North America and Europe，including:

Conventional custom plastic molds

Precision injection moulds

Insert molding tools

High cavitation injection molds

Mold making for large components

Two Shot molds / 2K molds/ Bi-injection moulds

Unscrewing molds

Gas assist moulds

Injection structural foam molds

Special structural moulds

Thermoset molds

Die casting tools

 

We look forward to discussing cooperation with friends and business partners from all over the world.