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Extrusion molding preparation method of polytrifluorochloroethylene bar

A polychlorotrifluoroethylene, extrusion molding technology, applied in the field of extrusion molding, can solve the problems of difficult molding operation control, many secondary processing waste, low product qualification rate, etc., to ensure product quality, overcome bending deformation, The effect of improving product quality

Pending Publication Date: 2022-08-05
ZHUZHOU HONGDA POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems that the small-diameter rods formed by polytrifluorochloroethylene are difficult to control in molding operations, the qualified rate of products is low, the products are short, there are many secondary processing wastes, and the loss is large, the invention proposes a polytrifluoroethylene Extrusion Technology of Vinyl Chloride Small Diameter Rods

Method used

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  • Extrusion molding preparation method of polytrifluorochloroethylene bar
  • Extrusion molding preparation method of polytrifluorochloroethylene bar
  • Extrusion molding preparation method of polytrifluorochloroethylene bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Take the rod with a diameter of 10mm as an example, check the intact of 45#extruded molding machine equipment, do a good job of site and equipment hygiene, check whether the heating element and melt pump heating element are normal, prepare a diameter of 10mm product mold mold , Cooling set and supporting heating elements, cleaning molds, installation molds and supporting heating elements.

[0064] The requirements of the squeeze, melt pump and mold temperature setting are as follows:

[0065] 1 section of the extrusion machine: 160 ℃;

[0066] Extruder 2 Section Temperature: 200 ° C;

[0067] 3 sections of the extrusion machine: 260 ℃;

[0068] Squeeze out 4 -stage temperature: 280 ° C;

[0069] Flange temperature before the melt pump: 280 ° C;

[0070] The temperature of the melt pump pump: 280 ° C;

[0071] The temperature of the melt pump door panel: 280 ° C;

[0072] Mold mold temperature: 280 ° C;

[0073] The host temperature is divided into:

[0074] Paragraph 1: 180...

Embodiment 2

[0083] Take a rod with a diameter of 5mm as an example. Check the intact of 45#extruded molding machine equipment, do a good job of site and equipment hygiene, check whether the heating element and melt pump heating element are normal, prepare 5mm product mold mold mold mold molds , Cooling set and supporting heating elements, cleaning molds, installation molds and supporting heating elements.

[0084] The requirements of the squeeze, melt pump and mold temperature setting are as follows:

[0085] 1 section of the extrusion machine: 150 ° C;

[0086] Extruder 2 Section Temperature: 190 ° C;

[0087] 3 sections of the extrusion machine: 250 ℃;

[0088] Squeeze out 4 -stage temperature: 270 ° C;

[0089] Flange temperature before the melt pump: 240 ° C;

[0090] Followed pump body temperature: 240 ° C;

[0091] The temperature of the melt pump door panel: 240 ° C;

[0092] Mold mold temperature: 240 ° C;

[0093] The host temperature is divided into:

[0094] Paragraph 1: 180 ° C;

...

Embodiment 3

[0103] Take the rod with a diameter of 20mm as an example. Check the intact of 45#extruded molding machine equipment, do a good job of site and equipment hygiene, check whether the heating element and melt pump heating element are normal, and prepare a diameter of 20mm product mold mold , Cooling set and supporting heating elements, cleaning molds, installation molds and supporting heating elements.

[0104] The requirements of the squeeze, melt pump and mold temperature setting are as follows:

[0105] 1 section of the extrusion machine: 170 ℃;

[0106] Extruder 2 Section Temperature: 210 ° C;

[0107] 3 sections of the extrusion machine: 270 ° C;

[0108] Squeeze out 4 -stage temperature: 290 ° C;

[0109] Flange temperature before the melt pump: 280 ° C;

[0110] The temperature of the melt pump pump: 280 ° C;

[0111] The temperature of the melt pump door panel: 280 ° C;

[0112] Mold mold temperature: 300 ° C;

[0113] The host temperature is divided into:

[0114] Paragraph 1...

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Abstract

The invention provides an extrusion molding preparation method of a polytrifluorochloroethylene bar, and belongs to the technical field of extrusion molding. Comprising the following steps: starting main machine sections 1-3, an extruder and a mold for heating, starting a main machine section 4 and a melt pump for heating after a set temperature is reached, keeping the temperature constant after the set temperature is reached, starting a main machine and adjusting the rotating speed, starting the rotating speed of the melt pump, rotating a screw rod, feeding, and installing a cooling shaping sleeve and connecting a cooling water pipe when a bag plasticized melt is discharged from a mold body opening; plugging one end of the damping rod into the cooling shaping sleeve, adding the other end of the damping rod into the damping clamping plate, starting cooling liquid in a cooling area, starting cold water in the cooling area, adjusting the extruder to a policy working state, adjusting the clamping force of the damping machine, controlling the advancing speed, ensuring that the density of the extruded rod is qualified, and cutting to obtain the polytrifluorochloroethylene rod. Continuous extrusion molding of small-diameter bars is achieved, and the production efficiency of preparing the same product through compression molding is improved.

Description

Technical field [0001] The present invention involves the field of extrusion molding technology, which specifically involves a polytetrafluoroethylene ethylene rod squeezing forming preparation method. Background technique [0002] In the fluoroplasty series, polytefluorhyl chloride has high mechanical strength, corrosion resistance, wear resistance and excellent cold resistance, and has a good mechanical strength in a low-temperature environment of -273 ° C. One of the best varieties is widely used in special seals in the fields of high -tech cutting -edge technologies such as liquid oxygen, liquid nitrogen, and other low -temperature states. [0003] In the late 1960s, a small amount of polytamononyl chloride rod products and raw materials was introduced in the late 1960s, and the research of molding and molding process was conducted. With the rapid development of the chemical industry, PFA (tetrafluoroethylene and general alkyl ethylene rhinohol cluster ), FEP (tetrafluoroethy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/06B29C48/25B29C48/625B29C48/885B29C48/90B29K27/12
CPCB29C48/022B29C48/06B29C48/25B29C48/625B29C48/885B29C48/905B29K2027/12
Inventor 肖炳荣张鹏吴柱朱基贵曾维楚
Owner ZHUZHOU HONGDA POLYMER MATERIALS
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