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Mould used for producing thick-wall pipes with uniform wall thickness

A thick-walled pipe and uniform technology, applied in the field of pipe production equipment, can solve problems such as thin upper end and thicker lower end

Active Publication Date: 2020-10-09
GUANGDONG LIANSU TECH INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned problem of thick-walled pipes in the prior art when the upper end is thin and the lower end is thick during extrusion molding, the present invention provides a mold for producing thick-walled pipes with uniform wall thickness. By destroying the formation conditions of melt sagging, the The wall thickness of the thick-walled pipe produced by the mold is uniform

Method used

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  • Mould used for producing thick-wall pipes with uniform wall thickness
  • Mould used for producing thick-wall pipes with uniform wall thickness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as Figure 1-2 Shown is an embodiment of a mold for producing thick-walled pipes with uniform wall thickness, including a mold base 1, a spiral body 2 connected with the mold base 1 and an outer mold body 3, a shrinkage core 4 connected with the spiral body 2, and The mold core 5 connected to the shrinkage core 4, the die 6 arranged outside the die core 5 and the die holder 7 for fixing the die 6, between the spiral body 2, the shrinkage core 4, the outer mold body 3 and the die holder 7 A flow channel 8 is formed, an extrusion channel 9 is formed between the die 6 and the core 5, the flow channel 8 is connected to the extrusion channel 9, and a driving mechanism for driving the core 5 to rotate is mounted on the mold base 1 .

[0023] Wherein, the drive mechanism includes a drive shaft 10 connected to the mold core 5 and a power source assembly that drives the drive shaft 10 to rotate, and the power source assembly includes a mounting plate 11 mounted on the mold ...

Embodiment 2

[0031] Such as Figure 1-2 Shown is another embodiment of a mold for producing thick-walled pipes with uniform wall thickness. The difference from Embodiment 1 is that it also includes an auxiliary material delivery part 14 connected to the extrusion channel 9 and connected to the auxiliary material delivery part 14. Feeding auxiliary machine 15. When the melt is extruded from the channel 9, due to the self-weight tension of the melt, the pressure at the upper end of the extrusion channel will decrease and the discharge of the upper part will be too slow, which will also cause the problem that the wall thickness of the pipe is thinner at the upper end and thicker at the lower end. When in use, the auxiliary material feeding part 14 and the feeding auxiliary machine 15 will be located at the upper end, and the melt will be extruded from the auxiliary material feeding part 14 into the extrusion channel 9 through the feeding auxiliary machine 15 to complete the comparison of the ...

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Abstract

The invention relates to the field of pipe production equipment, in particular to a mould used for producing thick-wall pipes with uniform wall thickness. The mould comprises a mould base, a spiral body connected with the mould base, an outer mould body connected with the mould base, a shrinkage core connected with the spiral body, a mould core connected with the shrinkage core, and an opening mould arranged on the exterior of the mould core. Runners are formed between the spiral body and the shrinkage core and the outer mould body. An extruding channel is formed between the opening mould andthe mold core. The runners communicate with the extruding channel. The mould base is provided with a driving mechanism for driving the mould core to rotate. According to the mould, the mould core rotates, a part of the inner wall of a melt in the extruding channel generates circumferential motion force, by means of such reverse acting force, the forming condition of melt stacking caused by melt drooping is destroyed, then the problem that in the thick-wall pipe production process, due to drooping of the melts, the upper ends of the pipes are thin, and the lower ends of the pipes are thick is avoided, the yield of the thick-wall pipes is increased, and the product quality is improved.

Description

technical field [0001] The invention relates to the field of pipe production equipment, more specifically, to a mold for producing thick-walled pipes with uniform wall thickness. Background technique [0002] Conventional molds for pipe production generally include a helix connected to the mold base, an outer mold body is provided outside the helix, and a mold core and a die disposed outside the mold core are also included. The melt enters the spiral body, flows along the spiral groove of the spiral body, enters the channel between the die and the core, and finally flows out of the channel to form. For example, the patent document with the application number "CN201721019735.4" discloses a new type of PE hollow wall winding pipe forming mold, including a connecting section, a base connected to the connecting section, and a spiral connected to the base. The spiral is provided with an outer mold body. It also includes a shrinking core. The shrinking core forms a channel with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/32B29C48/09B29C48/92
CPCB29C48/32B29C48/09B29C48/92B29C2948/92514B29C2948/92904
Inventor 邓添华郭伟谭建志
Owner GUANGDONG LIANSU TECH INDAL