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Multi-injection molding process one-time molding method for high-toughness home appliance panel

A molding method and high-toughness technology, applied in the field of multi-injection molding process of high-toughness home appliance panels, can solve the problems of cracking of the adhesive layer, fatigue resistance, easy cracking, etc., and achieve good integrity and toughness, and it is not easy to bend. and shedding effect

Active Publication Date: 2019-05-10
太仓意欣智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a toughening agent solves the problem of low elongation and high brittleness after curing of the PC resin during processing. When the bonding part is subjected to external force, cracks are easy to occur and expand rapidly, resulting in cracking of the adhesive layer, which is not fatigue-resistant and cannot be used as Problems with Structural Bonding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A multi-injection molding method for a high-toughness home appliance panel described in this embodiment includes the following steps:

[0056] ① Select 50 parts by mass of PC resin and dry it for 5 hours at a temperature of 120°C until the water content of the PC resin is lower than 0.02%; mix the dried PC resin with 20 parts by mass of filler, 7 parts by mass of The toughening agent of 4 mass parts, the lubricating dispersant of 4 mass parts, the antioxidant of 2 mass parts and the antiultraviolet agent of 2 mass parts drop into the high-speed mixer that paddle speed is 120 rev / mins high-speed premixing 5 minutes together; Put the pre-mixed raw material mixture in the high-speed mixer into the hopper of the twin-screw extruder for melting, mixing, and extrusion. The screw temperature of the twin-screw extruder is controlled between 250 ° C and the screw speed is 180 rpm. Minutes; the raw materials extruded by the twin-screw extruder are drawn, cooled, dried, pelletized...

Embodiment 2

[0077] A multi-injection molding method for a high-toughness home appliance panel described in this embodiment includes the following steps:

[0078] ① Select 90 parts by mass of PC resin and dry it for 7 hours at a temperature of 140°C until the water content of the PC resin is lower than 0.02%; mix the dried PC resin with 40 parts by mass of filler, 13 parts by mass The toughening agent of 8 mass parts, the lubricating dispersant of 8 mass parts, the antioxidant of 4 mass parts and the antiultraviolet agent of 4 mass parts are put into the high-speed mixer that paddle speed is 120 revs / min together and premixed at high speed for 5 minutes; Put the pre-mixed raw material mixture in the high-speed mixer into the hopper of the twin-screw extruder for melting, mixing, and extrusion. The screw temperature of the twin-screw extruder is controlled between 280°C and the screw speed is 180 rpm. Minutes; the raw materials extruded by the twin-screw extruder are drawn, cooled, dried, p...

Embodiment 3

[0099] A multi-injection molding method for a high-toughness home appliance panel described in this embodiment includes the following steps:

[0100] ① Select 70 parts by mass of PC resin and dry it for 6 hours at a temperature of 130°C until the water content of the PC resin is lower than 0.02%; mix the dried PC resin with 30 parts by mass of filler, 10 parts by mass of The toughening agent of 6 mass parts, the lubricating dispersant of 6 mass parts, the antioxidant of 3 mass parts and the antiultraviolet agent of 3 mass parts drop into the high-speed mixer that paddle speed is 120 rev / mins high-speed premixing 5 minutes together; Put the pre-mixed raw material mixture in the high-speed mixer into the hopper of the twin-screw extruder for melting, mixing, and extrusion. The screw temperature of the twin-screw extruder is controlled between 265°C and the screw speed is 180 rpm. Minutes; the raw materials extruded by the twin-screw extruder are drawn, cooled, dried, pelletized ...

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Abstract

The invention discloses a multi-injection molding process one-time molding method for a high-toughness home appliance panel. The multi-injection molding process one-time molding method is characterized by comprising the following steps of preparing materials for injection molding; inputting relative parameters of the four-stage injection molding process on a control panel of an injection molding machine; pushing a manual / automatic change-over switch on an electric control cabinet to the automatic position; inputting location parameters and pressure holding parameters of a screw rod on a touchinput screen when completion of filling meeting process switching conditions; closing a safety door of the injection molding machine, pressing an on / off switch in an on position to start the injectionmolding machine; and opening a mold and taking out workpieces after completion of injection molding. According to the multi-injection molding process one-time molding method, the injection molding machine is controlled by a PLC to conduct regulation to adopt different injection molding processes at different injection molding stages according to data stored from the control panel of the injectionmolding machine. Meanwhile, compared with a bonded panel, the panel manufactured through multi-injection molding one-time molding has the good integrity and toughness and is not likely to get bent and fall off.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a multi-injection molding method for a high-toughness home appliance panel. Background technique [0002] With the progress of society, household appliances are being used and updated more frequently in each household. In order to pursue a higher quality of life, people pay more and more attention to the quality of home appliances. The panels of traditional home appliances, such as refrigerators, washing machines, air conditioners and water dispensers, are formed by injection molding. [0003] Injection molding machine is a kind of plastic production equipment that can form plastic products with complex shape, precise size or dense texture with metal inserts at one time. It is to add granular or powdery plastic into the barrel, and through the rotation of screw Heating the outer wall of the machine barrel to make the plastic melt, then the machine clamps th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76B29C45/78B29C45/77C08L69/00
Inventor 宣珠萍宣丹萍
Owner 太仓意欣智能科技有限公司
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