Short and thick runners are preferred. The sprue diameter should be on the larger side; if too small, it results in significant pressure loss.

The rheological curve of PBT is relatively steep, the temperature range of the moulding is relatively narrow, the temperature requirement during the moulding process is relatively strict, the temperature will be too high to overflow, the temperature will be too low to block the nozzle.

Additionally, PBT products, along with PPE, PC, POM, and PA, are collectively referred to as the five major general-purpose engineering plastics.

Our Low Volume Injection Moulding is a specialised service that provides complete production-quality parts in quantities of 10,000 or less bits, depending on the method. Our low-volume moulding, also known as short runs, is closely supervised and regulated to ensure that all aspects of mould design and construction are met. Small and medium-sized companies, as well as small-batch manufacturing, benefit from this form of production.

Due to PBT’s properties, including heat resistance, weather resistance, chemical resistance, excellent electrical characteristics, low moisture absorption, and good gloss, it is widely used in electronics, automotive parts, machinery, household items, and more.

PBT material it uses, such as adding 15% glass fiber PBT material used as energy-saving lamp base and shell, PBT/PC alloy as the sole of ice skates, others such as relay shells, sockets, switches, tuner shells, food processing blades, vacuum cleaner components, fans, hair dryer shells, coffee utensils and so on.

Finally, in order to avoid the problem of design leakage, FOWMOULD provides the service of signing NDA confidentiality agreement to maximise the protection of customer’s design.

Please contact us if you would like to receive a quotation and/or to find our more about how we can provide the service you are looking for.

In 1971, Eastman introduced glass-fiber reinforced and unreinforced products under the brand name Tenite (PTMT); that same year, GE also developed similar products, offering unreinforced, reinforced, and flame-retardant varieties.

To delve deeper into the potential of innovative materials, follow along as we further research and uncover the prominence of PBT material in the realm of injection molding.

Our expertise in plastic injection moulding helps us to provide a complete turn-key solution for your plastic manufacturing needs, whether it’s an automotive part for bespoke custom builds or prototype construction for healthcare system components.

Subsequently, renowned global manufacturers such as Germany’s BASF and Bayer, America’s GE and Ticona, Japan’s Toray and Mitsubishi Chemical, Taiwan’s Shin Kong Synthetic Fibers, Chang Chun Plastics, and Nan Ya Plastics, among others, entered into production, totaling over thirty producers worldwide.

In conclusion, polybutylene terephthalate (PBT) is a high-quality plastic material that makes its mark in injection moulding, and if you want to try to start a PBT injection molding project, it is especially important to choose a good injection moulding manufacturer.

FOWMOULD, located in Taizhou, Zhejiang Province, has 40 years of experience in mould injection moulding and a professional design and manufacturing team, which is able to provide customers with comprehensive one-stop PBT injection moulding services.

We have been established for many years and with our young and vibrant management team have vast experience in all aspects of plastic injection moulding – from the design stages through to the final packaged product.

With the refinement of PBT’s polymerization techniques, molding PBT has become increasingly straightforward. In injection molding, PBT plastic displays these processing features:

First,PBT boasts attributes like high toughness, thermal resistance, and fatigue resistance. It provides self-lubrication, a low coefficient of friction, and retains many of its physical characteristics even in humid settings, although it does exhibit higher volume resistivity and dielectric loss.

ACIS®, Autodesk Inventor®, CATIA® V5,Creo™ Parametric, IGES, Parasolid®, Pro/ENGINEER®,Siemens PLM Software’s NX™, SolidEdge®, SolidWorks®, STEP

As a big manufacturing country, China has many excellent companies and manufacturers that are fruitful in the field of injection moulding.

PBT in electronic products in the second largest use as a cooling fan, cooling fan is placed in the machine for a long time rotating to help dissipate heat, the physical requirements of the plastic is heat-resistant, flame retardant, insulating and mechanical strength, PBT is usually used to add 30% glass fiber modified as a cooling fan outside the frame and fan blades.

In 1970, they introduced it to the market as a 30% glass fiber reinforced plastic under the name X-917, which was later renamed CELANEX.

In addition , FOWMOULD’s physical plant is equipped with professional injection moulding equipment to ensure the quality and precision of PBT products while ensuring that production is completed within the agreed deadlines.

Polybutylene terephthalate (abbreviated as PBT), belongs to the polyester family. It is formed by the polycondensation of 1,4-butylene glycol and terephthalic acid (PTA) or dimethyl terephthalate (DMT), and is processed through a blending procedure to produce a milky white, semi-transparent to opaque, crystalline thermoplastic polyester resin.Alongside PET, it is commonly referred to as a thermoplastic polyester or saturated polyester.

To address these challenges, PBT material often undergoes modification through the addition of specific ratios of glass fiber reinforcements or inorganic mineral fillers, enhancing its tensile and bending strengths, as well as its thermal deformation temperature.

It quickly crystallizes at cooler temperatures and is known for its favorable moldability, though it does suffer from low notch impact strength and a significant molding shrinkage rate.

At the same time, PBT molecules contain ester bonds, which will decompose under the action of strong acid, strong alkali and water vapour, which will easily cause performance defects and discolouration problems of PBT parts.

Use of mould releasing agent: Normally no mould releasing agent is used, if necessary, silicone mould releasing agent can be used.

Another important advantage of using softer injection moulds is that they rarely have a negative impact on component quality: when proper design requirements are taken into account, plastic parts made in low quantities are just as good as those produced using hardened steel moulds.

Furthermore, PBT is resilient to hot water, bases, acids, and oils. However, it’s vulnerable to corrosion by halogenated hydrocarbons and lacks in hydrolytic resistance.

We at Stephens Plastic are always looking for ways to improve our performance. That means working closely with and of our customers during the process, from design and prototyping to post-production and delivery, to ensure that they receive high-quality parts manufactured on a budget and delivered on time. Contact us today to learn more about how we can bring your ideas to life.

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The modification of PBT is mainly divided into: flame retardant PBT, glass fiber reinforced flame retardant PBT, glass fiber reinforced PBT, PBT co-mingled gold.

Additionally, PBT is commonly blended with other polymers, like pc/pbt or abs/pbt, resulting in plastic alloys tailored for specific application needs.

The physical requirements of the bobbin winding, including insulation, heat resistance, resistance to welding, mobility, strength, etc., the applicable materials are phenolic resin, PBT, PA6, PET.

Connector is a bridge between the signals, is to transmit electronic signals and power connections indispensable components, PBT balanced physical properties and prices are in line with the needs of the connector.

PBT usually add 30% glass fiber blended as a connector, PBT because of mechanical properties, solvent resistance, good forming and processing and low prices are widely used.

FOWMOULD boasts 40 years of mold manufacturing experience, providing professional insights into optimizing PBT mold design.

At the same time, cooling in the mold is crucial. The mold’s cooling channel design must be optimal to minimize product warping. Heat dissipation should be rapid and uniform.

The third use of PBT is as a transformer, relay winding shaft, generally to PBT plus 30% glass fiber reinforced injection molding.

FOMWMOULD’s manufacturing experts and production capabilities are at your disposal to create high-quality injection moulded PBT parts.

In recent years, PBT plastic, as the “rising star” of engineering plastics, has gained widespread use in the automotive, electronics, home construction, and medical fields due to its excellent performance.

PBT was originally developed by German scientist P. Schlack in 1942. Later, the American company Celanese (now Ticona) carried out industrial development and launched it under the brand name Celanex.

Downtime treatment: PBT downtime within 30min, the temperature can be reduced to 200 ℃ when the shutdown. When producing again after a long shutdown, the material in the barrel should be emptied, and then add new material to carry out normal production.

Half of the PBT consumed in the automobile industry is formed with PC as PBT/PC alloy, which can be used as automobile bumper. In addition, PBT can also be used for window motor shells, locomotive motor parts, automotive transmission gear box, radiator window, body panels, wheel covers, door and window parts.

It’s essential to incorporate exhaust grooves or holes in the mold to prevent poor mold filling, prominent weld lines, and burn marks due to inadequate venting.

Low-volume injection moulding uses softer aluminium moulds and inserts instead of hardened steel ones, which are usually simpler and less expensive to produce. These moulds are obviously not as durable as their hardened steel counterparts, but manufacturers benefit because they don’t always need to be when manufacturing low-volume components. Soft moulds, when used strategically, can lower tooling costs and shorten production times.

At the same time, hardened steel, which is needed for conventional moulds, requires a substantial upfront time and financial investment. Moulds made of aluminium or lower-grade steel, on the other hand, are much less costly to make and can be made far quicker. Manufacturers may use these moulds to test and produce viable parts without having to commit to large minimum orders, allowing them to fine-tune component design and production as required. This enables producers to start manufacturing faster and, in many cases, greatly increase speed-to-market, reducing the time it takes to see a return on investment.

Stephens Plastic has the expertise, knowledge, and experience to provide just what you need, whether it’s 10 or 100,000 plastic parts, thanks to its ability to provide both low and high volume injection moulding.

As one of the engineering plastics, in the actual application field, most of the PBT need to be modified to meet the corresponding requirements.

The products should have uniform wall thickness to prevent internal stresses caused by uneven cooling or shrinkage, which can lead to warping and deformation.