A processing method of abs resin low-pressure injection molded refrigerator liner

A technology of ABS resin and low pressure injection molding, which is applied in the processing field of ABS resin low pressure injection molding refrigerator inner tank, can solve the problems of asynchronous action of two core pulling blocks, affecting the plate forming efficiency, easy cracking of the refrigerator inner tank, etc., and achieves low pressure. , Improve the service life, the effect of low injection pressure

Active Publication Date: 2018-03-02
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the demoulding mechanism of this structure, the two core-pulling blocks are completely driven by the cylinder during the demoulding action, which is difficult to control in actual operation, resulting in asynchronous movements of the two core-pulling blocks, which ultimately affects the sheet forming efficiency; The molded refrigerator liner needs to be trimmed, the production process is more complicated, and the molded refrigerator liner generally has the problem of easy cracking

Method used

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  • A processing method of abs resin low-pressure injection molded refrigerator liner
  • A processing method of abs resin low-pressure injection molded refrigerator liner
  • A processing method of abs resin low-pressure injection molded refrigerator liner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The refrigerator liner in this example is a refrigerator liner produced by a domestic refrigerator company, and the ABS resin provided by JSJ is used as the liner material, and its performance indicators are:

[0040] Test items

unit

standard test

Acrylonitrile-butadiene-styrene plastic (ABS)

Melt Index

g / 10min

ASTM D1238

8

Tensile Strength

MPa

ASTM D638

40

Elongation

%

ASTM D638

20

Bending strength

MPa

ASTM D790

65

Flexural modulus

MPa

ASTM D790

2000

Notched Izod Impact Strength (23°C)

kJ / m2

ASTM D256

55

[0041] The above-mentioned ABS resin is prepared into a refrigerator liner by a low-pressure injection molding method, and the specific processing steps are as follows:

[0042] a. Dry the ABS resin at 80°C for 6 hours, and then add it to the hopper of the low-pressure injection molding machine for standby;

[0043] b. First set the tem...

Embodiment 2

[0056] The performance index of the ABS resin in the present embodiment is:

[0057] Test items

unit

standard test

Acrylonitrile-butadiene-styrene plastic (ABS)

Melt Index

g / 10min

ASTM D1238

7

Tensile Strength

MPa

ASTM D638

45

Elongation

%

ASTM D638

27

Bending strength

MPa

ASTM D790

72

Flexural modulus

MPa

ASTM D790

2500

Notched Izod Impact Strength (23°C)

kJ / m2

ASTM D256

47

[0058] The above-mentioned ABS resin is prepared into a refrigerator liner by a low-pressure injection molding method, and the specific processing steps are as follows:

[0059] a. Dry the ABS resin at 90°C for 6 hours, and then add it to the hopper of the low-pressure injection molding machine for standby;

[0060] b. First set the temperature of each zone of the screw of the low-pressure injection molding machine as follows: the first section is set to 220°C, the second s...

Embodiment 3

[0073] The performance index of ABS resin raw material is in the present embodiment:

[0074] Test items

unit

standard test

Acrylonitrile-butadiene-styrene plastic (ABS)

Melt Index

g / 10min

ASTM D1238

5

Tensile Strength

MPa

ASTM D638

50

Elongation

%

ASTM D638

38

Bending strength

MPa

ASTM D790

85

Flexural modulus

MPa

ASTM D790

2700

Notched Izod Impact Strength (23°C)

kJ / m2

ASTM D256

40

[0075] The above-mentioned ABS resin is prepared into a refrigerator liner by a low-pressure injection molding method, and the specific processing steps are as follows:

[0076] a. Dry the ABS resin at 75°C for 7 hours, and then add it to the hopper of the low-pressure injection molding machine for standby;

[0077] b. First set the temperature of each zone of the screw of the low-pressure injection molding machine as follows: the first section is set to 220°C, the...

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Abstract

The invention provides a processing method for an ABS resin low-pressure injection molding refrigerator liner, which adopts a low-pressure injection molding process to produce the refrigerator liner. Including a, ABS resin drying; b, setting the temperature of the low-pressure injection molding machine, connecting the gate of the low-pressure injection mold with the nozzle of the low-pressure injection molding machine; c, setting the temperature of the low-pressure injection mold, and its hot runner system operation; d, cleaning the low-pressure injection mold Needle valve gates of each hot nozzle on the injection mold make all the sliders of the movable mold back, close the mold to push out the fixed mold, lock the movable mold and the fixed mold after the mold core is in place; e, set the low pressure injection molding machine Melt glue and glue injection process, glue injection is carried out in sequence according to the time period; f, adjust the hydraulic pressure parameters of the hydraulic system; g, the cooling system cools the mold; h, return each group of sliders, open the mold, eject, and take out product. Realized the process of direct injection molding of ABS resin, solved the problem of stress cracking of refrigerator liner during use, and filled the technological gap of low-pressure injection molding of refrigerator liner.

Description

technical field [0001] The invention belongs to the technical field of refrigerator manufacturing, and relates to a processing method for ABS resin low-pressure injection molding refrigerator liners. Background technique [0002] Acrylonitrile-butadiene-styrene plastic (ABS) resin is one of the five major synthetic resins. It has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance and electrical properties. Stable, good surface gloss and so on. It is easy to paint, color and surface metal spraying, electroplating, welding, hot pressing and bonding and other secondary processing. It is widely used in industrial fields such as machinery, automobiles, electronic appliances, instruments and meters, textiles and construction. It is an extremely versatile product. Wide range of thermoplastic engineering plastics. [0003] In the existing refrigerator production process, vacuum suction molding molds are used to produce semi-finished refri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/77B29K55/02
CPCB29C45/0001B29C45/27B29C45/73B29C45/77B29K2055/02
Inventor 杨桂生蒋超杰孙利明
Owner HEFEI GENIUS NEW MATERIALS
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