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Mold for manufacturing plastics parts comprising optimized system for adjusting volume of molding chamber

A technology for adjusting systems and molds, applied in the field of motor vehicle body parts, can solve problems such as inability to ensure pressure, achieve balanced thrust, avoid stress concentration, and increase the number of effects

Inactive Publication Date: 2018-08-28
CO PLASTIC OMNIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pressure peaks make it impossible to ensure uniform pressure during molding

Method used

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  • Mold for manufacturing plastics parts comprising optimized system for adjusting volume of molding chamber
  • Mold for manufacturing plastics parts comprising optimized system for adjusting volume of molding chamber
  • Mold for manufacturing plastics parts comprising optimized system for adjusting volume of molding chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] A mold 10 for producing plastic parts comprises a first element 12 (eg a die) and a second element 14 (eg a punch). These two elements 12 and 14 delimit a molding chamber 16 in the closed position of the mold 10 . One of these elements is equipped with a molding chamber volume adjustment system 18 . In Figure 1 to Figure 7 In the example shown, the molding chamber volume adjustment system 18 is arranged on the second element 14 . The system 18 includes a movable mass 20 and a mechanical movement system 22 capable of moving the movable mass 20 in a given direction 24 . This direction 24 depends on the orientation of the surface to be compressed and / or to be expanded of the part to be molded. exist Figure 1a , Figure 2a with Figure 3a , the direction 24 is along the vertical axis. The mechanical movement system 22 may move the movable mass 20 in the direction 24 towards an orientation 26 which decreases the volume of the molding chamber 16 and / or towards an oppo...

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PUM

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Abstract

The invention relates to a mold (10) for manufacturing plastics parts, comprising a first element (12) and a second element (14), the two elements (12, 14) defining a volume of a molding chamber (16)in the closed position of the mold (10). At least one of the elements (12, 14) is provided with a system (18) for adjusting the volume of the molding chamber (16). The system (18) comprises a movableblock (20) and a mechanical movement system (22) capable of moving the movable block (20) in a given direction (24), in a direction (26) that reduces a volume of the molding chamber (16) and / or in anopposite direction (28) for increasing a volume of the molding chamber (16). The invention also relates to a method of compression molding, to a method of expansion molding and to a method of compression and expansion molding.

Description

technical field [0001] The invention relates to the technical field of producing parts, in particular motor vehicle body parts, made of plastic material by compression and / or expansion molding methods. Background technique [0002] In order to manufacture parts made of plastic material, preferably thermoplastic (TP) plastic material, it is known to use injection compression molding methods and / or injection expansion molding methods. The method uses molding equipment comprising: [0003] - a mold with a movable element and a fixed element, usually made of steel, such two elements forming a molding chamber in the closed position of the mould; [0004] - A press allowing the movement of the movable element towards the fixed element, generally a hydraulic or pneumatic press of the "vérin" type. [0005] Generally, after the mold is closed, molten plastic material is injected into the molding chamber. The injected material is compressed during cooling. Simultaneously with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/02
CPCB29C43/36B29K2105/06B29C2043/3283B29C2043/3294B29C2043/5825B29C2043/5833B29C43/58
Inventor 蒂埃里·雅克梅
Owner CO PLASTIC OMNIUM