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Mould element for forming a container, provided with decompression vents in the form of slots

A technology of vent holes and components, applied in the field of model components for forming containers with decompression vent holes in the form of slits, capable of solving problems such as strict manufacturing tolerances

Active Publication Date: 2016-08-03
SIDEL PARTICIPATIONS SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the two components to be formed with tight manufacturing tolerances so that they can fit together without play (unless it is accepted that the resulting vessel has imperfections, specifically material folds corresponding to the interface between the two components at the bottom of the model)

Method used

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  • Mould element for forming a container, provided with decompression vents in the form of slots
  • Mould element for forming a container, provided with decompression vents in the form of slots
  • Mould element for forming a container, provided with decompression vents in the form of slots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] figure 1 Shown is a model 1 for forming a container from a blank 2 made of plastic by blow molding or stretch blow molding.

[0038] The blank 2 may be an intermediate container which has already undergone a primary blowing operation using a preform. As in the example shown, it can also be a preform obtained by injection of plastic, such as PET.

[0039] Model 1 comprises a plurality of monolithic elements, preferably made of metallic material, such as steel or aluminium, but also alloys to improve their mechanical properties and / or corrosion resistance.

[0040] Thus, in the example shown, the mold comprises two half-moulds 3 articulated to each other about a vertical axis X, so that the blank 2 can be entered (as described for example in French patent application FR2856333 or in the corresponding international application WO05 / 002820), And each mold half has a molding wall 4 defining an undulating molding surface 5 with a molding cavity to form the body of the conta...

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PUM

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Abstract

The invention relates to a one-piece mould element (3, 7) for a mould (1) for manufacturing containers from blanks of plastic material by blow moulding or stretch blow moulding. Said mould element (3, 7) includes a one-piece moulding wall (4, 8) having a raised moulding surface (5, 9) bearing the imprint of at least one portion of a container, the moulding wall (4, 8) having at least one decompression vent (20) extending therethrough, said hole leading, via an inner opening (21), onto the moulding surface (9), which is provided in the form of a slot.

Description

technical field [0001] The present invention relates to forming containers from blanks made of plastics by blowing or stretch blowing in a mold having a cavity in which the container is to be molded. The term "blank" refers not only to preforms (generally obtained by injection), but also to intermediate containers which have been subjected to a pre-blowing operation using preforms. Background technique [0002] The mold generally includes a plurality of unitary elements, each element having a molding surface with a mold cavity for at least a portion of the container. Thus, the mold used to form the container includes the side walls of the mold cavity with the container body and the shoulder, the mold is generally divided into two mold halves that are hinged to each other to allow the blank to enter the mold, and a mold with the bottom of the container. The molded bottom of the cavity is located in an opening provided between the mold halves opposite the shoulder. For certa...

Claims

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Application Information

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IPC IPC(8): B29C49/48B29C49/62B29C49/06
CPCB29C49/06B29C2049/483B29C2049/4853B29C2049/4892B29C49/48B29C49/487105B29C2049/023B29C49/4823B29C49/64B29C2049/4882B29K2667/003B29L2031/7158B29L2031/757
Inventor J-C·朗格卢瓦R·贝尚M·布科布扎M·勒泰斯蒂
Owner SIDEL PARTICIPATIONS SAS