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Soft and hard plastic co-extrusion method

A kind of plastic, soft and hard technology, applied in the field of soft and hard plastic co-extrusion, to achieve the effect of simple shape of profile, reduce energy consumption, and reduce secondary processing

Inactive Publication Date: 2007-10-24
SHANGHAI CANAAN PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Second, secondary processing is required to insert soft profiles into hard profiles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] On one assembly line, use two extruders to add soft and hard plastics respectively;

[0021] At the same time, extrude into a pair of molds to make them bond in the mold at high temperature; the hard material is controlled at 175°C, and the soft material is controlled at 155°C;

[0022] The air in the mold is extracted on the vacuum cooling workbench, so that the plastic part is close to the wall of the mold cavity, and the heat is taken away; at the same time, the cooling water flows in the shaping mold to reduce the mold temperature, and the product is cooled and shaped;

[0023] The plastic part clings to the wall of the cooling shaping mold and transforms from a molten state to a glass state, and is pulled out from the shaping mold by a tractor; the motor power of the tractor is about 2 kilowatts, and its traction force is about several hundred kilonewtons;

[0024] The extruded length of the plastic part is cut synchronously by the cutting machine, and cut to lengt...

Embodiment 2

[0026] On one assembly line, use two extruders to add soft and hard plastics respectively;

[0027] At the same time, extrude into a pair of molds to make them bond in the mold at high temperature; the hard material is controlled at 180°C, and the soft material is controlled at 160°C;

[0028] The air in the mold is extracted on the vacuum cooling workbench, so that the plastic part is close to the wall of the mold cavity, and the heat is taken away; at the same time, the cooling water flows in the shaping mold to reduce the mold temperature, and the product is cooled and shaped;

[0029] The plastic part clings to the wall of the cooling shaping mold and transforms from a molten state to a glass state, and is pulled out from the shaping mold by a tractor; the motor power of the tractor is about 4 watts, and its traction force is about several hundred kilonewtons;

[0030] The extruded length of the plastic part is cut synchronously by the cutting machine, and cut to length by...

Embodiment 3

[0032] On one assembly line, use two extruders to add soft and hard plastics respectively;

[0033] At the same time, extrude into a pair of molds to make them bond in the mold at high temperature; the hard material is controlled at 185°C, and the soft material is controlled at 165°C;

[0034] The air in the mold is extracted on the vacuum cooling workbench, so that the plastic part is close to the wall of the mold cavity, and the heat is taken away; at the same time, the cooling water flows in the shaping mold to reduce the mold temperature, and the product is cooled and shaped;

[0035] The plastic part clings to the wall of the cooling shaping mold and transforms from a molten state to a glass state, and is pulled out from the shaping mold by a tractor; the motor power of the traction machine is about 5 kilowatts, and its traction force is about several hundred kilonewtons;

[0036] The extruded length of the plastic part is cut synchronously by the cutting machine, and cut...

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PUM

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Abstract

The invention relates to a hard plastic co-extrusion method, using two extrusion machines with soft hard plastic on a streamline to extrude to one mold to make it melt inside the mold, controlling the hard plastic in 175deg.C-185deg.C and the soft plastic in 155deg.C-165deg.C, extracting the air from the mold on the vacuum cooling working platform, allowing the plastic part sticking close to the mold cavity to get away the heat, cooling and shaping the product, with the plastic part close to the mold cavity tightly and converting from fuse state to glass state, using extractor to drag the shaping mold in the power of 2-5kw, extraction force hundreds of thousands N, the extruded part being cut synchronically by the cutter, using one mold to stick the soft and hard plastic directly, reducing secondary processing, labor cost and material cost.

Description

technical field [0001] The invention relates to a soft and hard plastic co-extrusion method. Background technique [0002] Frames used in plastic windows, refrigerators, etc. need to be compounded with soft profiles in order to play the role of sealing, air blocking, and heat preservation. [0003] In the prior art, generally, grooves are prefabricated in hard profiles, and soft materials are embedded to make soft and hard profiles fit together. But the production of this product requires two profile lines to complete: [0004] The hard profile should be composed of extruder, hard material mold, vacuum cooling table, tractor, cutting machine and other machines to complete the production and processing; [0005] Soft profiles also need the above-mentioned assembly line to complete the production and processing; [0006] Then the soft profile is embedded in the hard profile to form a soft and hard profile to meet the requirements of use. [0007] The problems with this app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/56B29C47/92B29C47/88B29C47/34B29C47/08B29C48/92B29C48/355
CPCB29C47/92B29C48/92B29C2948/92704B29C2948/92895
Inventor 夏承安夏超李正方
Owner SHANGHAI CANAAN PLASTIC CO LTD
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