Medical Device Components Vacuum Casting Injection Molds and Casings Using Polypropylene PA6

Product Description:

In industrial applications, components such as gears, bearings, seals, and bushings must endure high mechanical loads, wear, and harsh environments. Vacuum casting is an effective method for producing high-strength industrial parts that require precision and durability. Advanced materials like PEEK (Polyetheretherketone) and Polyamide (Nylon) are commonly used in the manufacturing of these critical components due to their exceptional mechanical properties, chemical resistance, and heat tolerance.

PEEK is one of the strongest materials available for industrial applications. Its high tensile strength, resistance to abrasion, and ability to perform under extreme temperatures make it an ideal choice for producing parts like gears, bearings, and seals that must withstand constant friction and mechanical stress. Polyamide, especially PA6 and PA66, is also a popular choice for industrial parts due to its excellent wear resistance and high impact strength. Polyamide is often used in bearings and seals, where long-term performance in tough operating conditions is essential.

The vacuum casting process for industrial parts begins by creating a master model, often a 3D-printed or CNC-machined prototype, which is then used to make a silicone mold. Liquid PEEK or Polyamide resin is injected into the mold under vacuum conditions, ensuring that the resin fills every cavity of the mold and results in a part with excellent surface finish and dimensional accuracy. The vacuum casting process also ensures that any air bubbles are removed, which is crucial when producing high-precision, functional industrial components.

The main benefits of using vacuum casting for industrial parts include the ability to quickly produce prototypes and low-volume parts for testing and evaluation. Manufacturers can test the performance of gears, bearings, and seals before scaling up to full production. This is particularly useful in industries where component failure is costly and testing is necessary to ensure the reliability of the final product. Vacuum casting is also cost-effective for producing small batches of industrial parts, which is ideal for applications in niche markets or where limited production runs are required.

Applications of vacuum casting
Vacuum casting is one of the most cost-effective ways to produce high quality, low volume plastic parts which can be similar to injection moulding parts

The parts are especially suitable for form, fit and function tests during the embodiment design stages, where they can be used for marketing, field user testing and product design verification purposes

There are many Urethane casting resins commercially available that can be used to create parts to satisfy a wide range of design requirements such as temperature requirements, different surface textures, hardness, etc.

Materials are also available to create parts that are fully opaque, translucent or completely transparent

Sometimes high-quality wax masters can be made using vacuum casting for investment casting to increase the finer details of intricate features

Typical technical specification

Polyurethane (PU), the full name of polyurethane, is a polymer material formed by polyol and polyisocyanate through polycondensation reaction with excellent mechanical properties

[1], which is extremely plastic. Its synthesis can be traced back to 1937, when Professor Byaer first synthesised straight-chain linear polyurethane resins using 1,6-hexanediisocyanate and 1,4-butanediol as raw materials

[2]. Several major classifications of polyurethanes include polyether-type, polyester-type, polyimide-type, and polyurea-type, etc. They can be made into materials such as polyurethane plastics (mainly foams), polyurethane fibres (known as spandex in China), polyurethane rubbers and elastomers

[3].After nearly eighty years of technological development, this material has a wide range of applications involving products such as coatings, adhesives, fabric finishes, leather modifiers, polyurethane soft/rigid foam, elastomers, etc., which are used in the fields of textiles, construction, aviation, shipping, transportation, medicine, electronics, and so on.

Flexible polyurethane mainly has a linear structure with thermoplasticity, which has better stability, chemical resistance, resilience and mechanical properties than PVC foams, with less compression variability. Heat insulation, sound insulation, shock resistance, anti-virus performance is good. Therefore, it is used as packaging, sound insulation and filtration materials. Rigid polyurethane plastic is lightweight, sound insulation, superior thermal insulation performance, chemical resistance, good electrical properties, easy processing, low water absorption. It is mainly used in construction, automotive, aviation industry, thermal insulation structure materials. Polyurethane elastomer performance between plastic and rubber, oil resistance, abrasion resistance, low temperature resistance, aging resistance, high hardness, elasticity. It is mainly used in the shoe industry and the medical industry. Polyurethane can also make adhesives, coatings, synthetic leather, etc.

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