Method for producing components from prefabricated parts designed as hollow bodies

A technology for producing parts and prefabricated parts, which is applied in the field of producing parts from prefabricated parts designed as hollow bodies, and can solve problems such as the production of parts that are not suitable for prefabricated parts.

Active Publication Date: 2022-04-29
PME FLUIDTEC GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, known blow molding methods are not suitable for the production of parts from preforms, because of the presence of plastic material, relatively high pressures are required to form parts from dimensionally stable preforms

Method used

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  • Method for producing components from prefabricated parts designed as hollow bodies
  • Method for producing components from prefabricated parts designed as hollow bodies
  • Method for producing components from prefabricated parts designed as hollow bodies

Examples

Experimental program
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Effect test

Embodiment Construction

[0051] figure 1 A mold 1 with a mold cavity 2 with a first injection head 3 and a second injection head 4 is shown. The mold is part of an injection molding machine not otherwise shown in the figures. Each injection head 3 , 4 is equipped with a drive, not shown in the figures, which actively moves the two injection heads 3 , 4 into and out of the mold cavity 2 . The mold cavity 2 is elongated. When moving in the longitudinal direction of the mold cavity, the two injection heads 3 , 4 move relative to each other when entering the mold cavity 2 and move away from each other when moving out of the mold cavity 2 . according to figure 1 The two injection heads 3, 4 are moved out of the mold cavity 2 by means of a drive. The first injection head 3 is also movably mounted on guide rails 5 , 6 . The melts of two different plastics are injected into the mold cavity 2 through a total of four needle valves 7 , 8 , 9 , 10 . In addition, fluid is injected into the liquid melt throug...

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PUM

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Abstract

A method for producing a component from a prefabricated and dimensionally stable preform, which is designed as a hollow body and has a prefabricated cavity and at least one opening, the method comprising the steps of inserting the preform (21) into a fitting In the cavity (2) of a plastic injection molding machine mold (1) with a first plastic injector; closing said mold (1); injecting a liquid plastic molding mixture of a first plastic (26) through said first plastic injector and introducing the liquid plastic molding mixture into the prefabricated cavity (23); injecting the first pressurized fluid into the liquid plastic molding mixture of the first plastic (26), displacing the plastic molding mixture in the forming a part cavity (28) in said plastic molding compound; and converting said preform (21) into said part, wherein said preform (21) is molded in a controlled manner and forms the outer contour of said part .

Description

technical field [0001] The invention relates to a method for producing a component from a preform which is designed as a dimensionally stable hollow body with at least one opening. Background technique [0002] For example, there are methods of producing parts from preforms from the fields of extrusion blow molding and stretch blow molding. Preforms are also known as parisons. In the prescribed method, a prefabricated and dimensionally stable preform made of thermoplastic resin is introduced into a blow mold, heated and shaped into the desired part under the action of compressed air. A mandrel can also be inserted into a heated preform, where the preform is mechanically elongated. The pressure and temperature of this method depend on the plastic used and the shape of the part. Typical pressure ranges are between 7 and 40 bar. Typical temperature ranges are between 80 and 120°C. The blow molding method is suitable for the production of thin-walled parts especially from P...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/46B29C49/18B29C49/24B29C49/26B29C49/78
CPCB29C49/46B29C49/783B29C2049/465B29C2049/4664B29C2049/4602B29C49/04B29C49/4247B29C2049/4661B29C45/14622B29C45/1671B29C45/1642B29C45/1704B29C2045/1707B29C2045/1724B29C45/1734B29C2045/0093B29L2023/22B29C2049/7831B29C2049/7832
Inventor F·威斯特法尔
Owner PME FLUIDTEC GMBH
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