Method and apparatus for extrusion of thermoplastic handrail
A technology of thermoplastic materials and thermoplastic elastomers, applied in applications, household appliances, household components, etc., can solve the problems of laborious manufacturing process, achieve excellent clamping and improve the strength of lips
Active Publication Date: 2015-04-15
EHC CANADA
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
This manufacturing process is laborious, requires considerable manual labor, and results in productivity that is limited by the speed of the rubber curing reaction—typically around 10 minutes—and the length of the mold
Method used
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[0052] Various apparatus or methods are described below to provide examples of embodiments of each claimed invention. The embodiments described below do not limit the invention in any way and any claimed invention may include apparatus and methods not described below. . The claimed invention is not limited to an apparatus or method having all the features of any one of the devices and methods described below, or to features common to a plurality or all of the devices described below. One or more inventions may reside in combinations or subcombinations of apparatus elements or method steps described below or elsewhere in this text. The devices or methods described below may not be embodiments of any claimed invention. Applicants, inventors and / or proprietors reserve all rights to any inventions disclosed in the following apparatus or methods not claimed in this document and do not discard them by disclosure of such inventions in this document , give away or contribute to the...
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Abstract
A method and apparatus for extrusion of an article is provided. A die assembly can apply flows of thermoplastic material to an array of reinforcing cables to form a composite extrusion. A slider fabric can be bonded to one side of the composite extrusion. After exiting the die assembly, the slider fabric can act to support the extrudate as it passes along an elongate mandrel, which can cause the base of the slider fabric to change shape from a flat profile to the final internal profile of the article. The extruded article can then be cooled to solidify the material. The die can include cooling for the slider fabric and means for promoting penetration of the thermoplastic into reinforcing cables.
Description
technical field [0001] This specification relates generally to thermoplastic handrails for escalators, moving walkways and other transportation equipment, and to methods and apparatus for manufacturing such handrails or other objects of substantially constant cross-section by a continuous extrusion technique. Background technique [0002] The following paragraphs are not an admission that anything discussed in them is prior art or part of the knowledge of those of ordinary skill in the art. [0003] Handrails are a well known and standard part of any escalator, moving ramp, moving walk or other similar transportation equipment. Typically, such armrests are primarily formed of rubber that forms the outer cover of the armrest and forms a comfortable outer "C" shape for the user to grip, and also includes a steel reinforcing cables and fabric plies. [0004] In order to position the handrail and enable it to travel automatically, it has a T-slot on its underside. The troughs...
Claims
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IPC IPC(8): B29C47/02B29C47/08B29C47/12B29C47/88B29C70/06B66B23/24B29C48/06B29C48/12B29C48/28B29C48/30B29C48/305B29C48/34B29C48/355B29C48/90
CPCB29C47/0052B29C47/8815B29C47/027B29C47/28B29C70/16B29C47/0023B29C47/065B29K2105/10B29L2031/463B29L2029/00B29L2031/3029B29L2031/709B29L2031/003B29K2105/20B29C48/156B29C48/05B29C48/06B29C48/07B29C48/12B29C48/0019B29C48/21B29C48/34B29C48/90B29C48/91B29C48/155B29C48/908B29C48/911B29C48/914B29C48/916B29C48/919B29C48/9135B29C48/28B29C48/307B29C48/355B29C48/905B29C48/906B29C48/2883B29C48/2886B29C48/15B29C70/06B66B23/24
Inventor A·O·肯尼D·J·韦瑟罗尔V·海德R·H·鲍尔A·S·康瑟
Owner EHC CANADA