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Method for forming inner ribs of plastic extrusion sections quickly and extrusion die head thereof

A technology for extruding dies and extruding profiles, which is applied in the field of rapid prototyping of plastic extruded profiles and extrusion dies, which can solve the problems of wasting raw materials and increasing production costs, and achieves the improvement of profile quality and reduction of raw materials Loss and bending prevention effect

Inactive Publication Date: 2013-04-24
TONGLING TRINITY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in this way, the inner ribs can be formed in a long period of time, which wastes a lot of raw materials and increases the production cost

Method used

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  • Method for forming inner ribs of plastic extrusion sections quickly and extrusion die head thereof
  • Method for forming inner ribs of plastic extrusion sections quickly and extrusion die head thereof
  • Method for forming inner ribs of plastic extrusion sections quickly and extrusion die head thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] Extrusion die such as figure 2 As shown, it usually includes machine neck 7, transition plate 6, bracket plate 5, compression plate 4, preformed plate 3, forming plate 2 and insert 1, and splitter cone 17 is integrated with transition plate 6 through connecting rib 15 , the core 8 is integrated with the support plate 5 through the connecting rib 10, and the insert 1 is fixed on the core 8 by screws. Extrusion die head of the present invention has vent hole 11 and airflow passage 12 respectively on insert 1 and core 8, has the lateral passage 13 that communicates with airflow passage 12 on support plate 5, and air inlet 16 is located at On the machine neck 7 , the machine neck 7 and the transition plate 6 are provided with an air intake channel 14 communicating with the side channel 13 . The distribution of vent holes 11 on the insert 1 is as follows image 3 As shown, four air vents 11a-d are respectively opened on the insert 1 corresponding to the four inner cavitie...

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Abstract

The invention relates to a method for forming inner ribs of plastic extrusion sections quickly and an extrusion die head thereof. Cooling air is conveyed to corresponding inner chambers of a parison on an extrusion part continuously through an outlet end from the inside of the extrusion die head, the air pressure of the inner chambers is balanced, and the inner ribs of the parison are subjected to cooling forming. In the method, the cooling air enters from the outer side of the die head and is conveyed to the inner chambers of the parison from the outlet end of the die head through an airflowchannel formed in the die head, the inner ribs of the parison are cooled, and the air pressure of each chamber is balanced simultaneously, so that the inner ribs are subjected to shrinkage forming within short time. Therefore, the inner ribs are prevented from being bent, the method is favorable for forming the inner ribs, the quality of the sections can be improved, and the raw material loss of the sections during initial extrusion can be reduced.

Description

technical field [0001] The invention relates to a method for rapid forming of inner ribs of plastic extruded profiles and an extrusion die head thereof. Background technique [0002] For hollow plastic profiles with inner ribs, under normal circumstances, when the parallel distance between the inner ribs or between the inner ribs and the outer wall is less than 6mm, the inner ribs are prone to bending or sticking. The specific situation is: at the beginning of traction, after the parison coming out of the die head enters the shaping mold, the outer wall of the parison is closely attached to the mold cavity under the vacuum of the shaping mold, and is cooled under the action of the cooling water of the shaping mold Shrinking and shaping, the parison becomes the required profile shape. However, the vacuum and cooling of the calibrating mold are difficult to act on the inner ribs of the parison. Compared with the outer wall of the parison, the inner ribs are still in a molten ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/08B29C47/88B29C47/12B29C48/12B29C48/11B29C48/30
CPCB29C48/11B29C48/12
Inventor 王陆兵张金银汪小义查安平
Owner TONGLING TRINITY TECH
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