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Parison guide

A technology of abutment surface and extrusion device, which is applied in the field of parison guidance, can solve the problems that the rotational force cannot be evenly transmitted to the parison, and the folds on both sides of the parison in the width direction, etc., and achieve the effect of simple structure and improved flatness

Active Publication Date: 2018-06-08
YACHIYO IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In this prior art, the rolling force is applied to the parison whose horizontal cross-section is arc-shaped, but since the rotational force cannot be uniformly transmitted to the parison, it is easy to cause wrinkles on both sides of the parison width direction.

Method used

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Examples

Experimental program
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Embodiment Construction

[0028] Specific embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are assigned to the same elements, and repeated descriptions are omitted. Before explaining the parison guidance, the extrusion device will be described first.

[0029] Such as figure 1 As shown, the extrusion device 2 is a device for extruding the parison P downward. The parison P is a resin in a molten state, and is a material of a resin molded product. The parison P in this example is a multilayer construction including a barrier layer. figure 2 The extrusion device 2 shown has a core 21 and a die 22 arranged with a gap on the periphery of the core 21 . The core 21 has a cylindrical shape extending in the vertical direction. On the lower side of the outer peripheral surface of the core 21, an outer peripheral diameter-enlarged surface 21a that expands in diameter downward is formed. The core 21 is movable in the direct...

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PUM

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Abstract

Provided is a parison guide whereby flatness of a parison can be enhanced by a simple configuration. A parison guide (1) for guiding a parison (P) arc-shaped in plane cross section discharged from anextrusion device (2), characterized by being provided with a contacting face (17) for coming in contact with an edge part of the parison (P) and guiding the parison (P) so as to smooth the parison (P)in a flat shape the contacting face (17) being attached to an end part of a discharge side of the extrusion device (2). The contacting face (17) is configured so as to include a curved face, and is preferably configured so that the curvature radius of the plane cross section of the contacting face (17) gradually decreases in size progressively in a discharge direction.

Description

technical field [0001] The invention relates to parison guidance for guiding a parison extruded by an extrusion device. Background technique [0002] When forming a hollow container made of resin, we have developed a parison guide that flattens a parison with an arc-shaped horizontal cross-section extruded by an extrusion device into a flat shape. As such parison guidance, the apparatus described in patent document 1 can be mentioned. [0003] The parison guide described in Patent Document 1 has a pair of rolls that rotate around a horizontal axis and contact the inner peripheral surface of the parison. The pair of rolls are arranged on both sides of the dividing device below the extruding device. [0004] According to this prior art, after the cylindrical parison is extruded from the extrusion device, the dividing device is divided into a pair of thin plates having an arc-shaped horizontal section. Afterwards, each parison is flattened into a flat shape by a pair of roll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/04B29C51/02B29C48/07B29C48/09B29C48/32
CPCB29C49/04B29C51/02B29C48/07B29C48/0017B29C48/32B29C48/0022B29C48/09B29C49/4242B29C2793/0063B29C2793/0081B29C49/04108B29C49/42105
Inventor 近藤久仁彦大滝一広箕轮祐治竹山俊成镒谷敏夫
Owner YACHIYO IND CO LTD