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Method of and apparatus for producing formable products

A product and material forming technology, applied in the field of producing formable products and machinable materials

Inactive Publication Date: 2009-07-15
PERA INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, fabrics are generally transparent to microwaves, thus causing the microwaves to concentrate on water, which is essentially the only microwave-sensitive component in the material

Method used

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  • Method of and apparatus for producing formable products
  • Method of and apparatus for producing formable products
  • Method of and apparatus for producing formable products

Examples

Experimental program
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Effect test

Embodiment approach

[0214] Other implementations include:

[0215] 1) One or more mobile transmitters / one or more antennas - physically moving relative to the workload which, when coupled to the moving cavity, can create a moving standing wave across the material to be heated;

[0216] 2) One or more directional emitters / antennas designed to produce a predictable and desired heating pattern in the far field, and more preferably in the near field, to direct energy towards the workload and achieve targeted heating;

[0217] 3) A system comprising a microwave transparent mold located in a microwave reflective cavity;

[0218] 4) A system based on one or more of the above, but using absorbing walls and / or sloped or serrated walls to dampen or destroy harmonics of the resonant cavity and to simplify or control the field distribution within the cavity;

[0219] 5) A system incorporating one or more of the above features.

[0220] targeted heating

[0221] Solid-state transmitters are now sufficientl...

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Abstract

The present invention provides a method and system for selectively heating portions of a thermoplastic material prior to processing. This may be achieved by including within the material components which are sensitive to heating radiation and other components which are not so sensitive or by directing heating energy to only parts of the material to be processed. Such selective heating reduces the time and energy required to bring the material into a flowable or otherwise processable condition and reduces the cooling time. The portion of material heated allows the entire material to be mixed, transferred, shaped, stamped, injected or extruded to form a product. The material may be processed by a melt processing technique, such as injection moulding, extrusion, compression moulding, extrusion -blow moulding or transfer moulding injection-expansion moulding, pultrusion. Electromagnetic energy, such as microwave radiation may be used for heating. One or more phases of the material may be transparent to the electromagnetic radiation and therefore non-heatable.

Description

technical field [0001] The present invention relates to methods of processing materials, material processing systems, and to processable materials. Preferred embodiments relate to methods and apparatus for producing formable products, such as polymer products and thermoplastic materials, which in preferred embodiments can provide more efficient production of product materials through selective through-thickness heating using electromagnetic radiation. Background technique [0002] The widely accepted definition of a thermoplastic is "a material capable of softening or melting or fusing when heated and hardening again when cooled". Thermoplastic materials are widely used to form products in nearly every field of industry and nearly every consumer product. Processing of thermoplastic polymers generally involves the use of thermoplastic pellets and melting / softening / melting by application of thermal energy followed by reshaping and cooling. Preliminary steps in this transform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/02B29C35/08
CPCB29C35/0805B29L2031/7132B29L2009/00B29C2035/0855B29C35/0272B29C51/422B29C35/0266B29K2105/16B29C35/002B29C35/12
Inventor 保罗·特兰特理查德·亚当·沃克斯蒂芬·约翰·艾森安德鲁·迈尔斯
Owner PERA INNOVATION
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