Device for heating preform bodies or flat or preformed semi-finished products from thermoplastic material

A technology for thermoplastic materials and preforms, applied in the field of equipment for heating preforms made of thermoplastic materials or flat or preformed semi-finished products, to achieve good release, improved process stability, and reduced heating energy.

Inactive Publication Date: 2016-02-24
瓦特罗恩股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they only concern the manufacturing process of plastic parts in the injection molding process

Method used

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  • Device for heating preform bodies or flat or preformed semi-finished products from thermoplastic material
  • Device for heating preform bodies or flat or preformed semi-finished products from thermoplastic material
  • Device for heating preform bodies or flat or preformed semi-finished products from thermoplastic material

Examples

Experimental program
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Effect test

Embodiment Construction

[0065] figure 1 A cross-sectional view of the apparatus for heating the preform 3 according to the present invention is shown, wherein the preform 3 is held between two coaxially arranged main bodies 1.0 and 2.0. As shown by detail A of the drawing, the body 1.0 has a first layer 1.1 and a contact layer 1.3. The first layer 2.1 and the contact layer 2.3 are also formed on the surface of the main body 2.0 which is disposed oppositely. Corresponding electric heating resistors in the form of conductor loops arranged in an area geometric manner are formed on each of the two first layers 1.1 and 2.1 of the main body 1.0 and the main body 2.0. Also, both the main body 1.0 and the main body 2.0 have contact elements (not shown) via which each of the heating resistors is independently connected to the power source 1.2 and the power source 2.2. When an adjustable current is applied to the heating resistors of the main body 1.0 and the main body 2.0, due to the corresponding geometrica...

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Abstract

The invention relates to a device for heating preform bodies or flat or preformed semi-finished products from thermoplastic material (3), comprising at least one base body (1.0, 2.0), on the surface of which at least a first layer or coating is formed, which comprises at least one electric heating resistor in the form of a flat, geometrically arranged conductor loop. The base body also has contact elements, by which the at least one heating resistor can be connected to a power source, wherein, as a result of the geometrically arranged conductor loop(s), a defined temperature profile can be generated, which can be transmitted contactlessly to the preform body or the semi-finished product by an outer contact layer formed on the first layer or coating, by contact with the surface of a preform body or semi-finished product and/or by using convection or thermal radiation. During a transmission of the defined temperature profile, the preform body or the semi-finished product is arranged at a distance to the contact layer(s).

Description

Technical field [0001] The present invention relates to an apparatus for heating a mold or a flat or preformed semi-finished product made of thermoplastic resin, especially a preform used for blow molding or for forming (thermoforming). Background technique [0002] The stretch blow molding process is widely used to make molds for thermoplastic resins or glass. In the beverage industry, containers (mainly bottles) with the most variable shapes and sizes are especially manufactured using this method. In this regard, a preform manufactured by injection molding is processed, which has a fully formed head region (bottle mouth) and a body to be formed in a stretch blow molding process. The body is first brought into a formable state by heating and before it is expanded by overpressure or vacuum, then it is mechanically stretched on a stretch strip. Locally different degrees of stretching occur in the stretching of the plastic, according to the forming process and due to the final sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/64B29C51/42B29C35/02
CPCB29C49/6436B29C51/422H05B3/141H05B3/146H05B3/46H05B2203/013H05B2203/025H05B2203/037B29C2035/0822B29C35/02B29C2035/0211B29B13/024B29C49/6463B29C49/12B29C51/421B29C49/6445B29K2105/258B29K2105/256B29C49/6409B29C49/6418B29C49/68B29C49/1218
Inventor 罗纳德·克劳斯马库斯·施泰因萨沙·巴赫
Owner 瓦特罗恩股份有限公司
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