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PP material part injection molding process for plastic valve

A technology for plastics and valves, which is applied in the field of injection molding of PP material parts for plastic valves. It can solve the problems of low efficiency, poor quality of injection molded parts, complex production process, etc., and achieve the effects of short production cycle, improved utilization rate and good aesthetics.

Inactive Publication Date: 2017-05-24
埃维柯塑料科技(安徽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many injection moldings require multiple injections, the production process is complicated, the efficiency is low, and the quality of the injection molded parts obtained is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An injection molding process of PP material parts for plastic valves, said process comprising the steps of:

[0025] (1) Raw material pretreatment: preheat the PP material to 85°C after drying for 1 hour;

[0026] (2) Injection molding machine and injection mold pretreatment: along the direction from the feed port to the nozzle, the barrel in the injection molding machine is the third section of the barrel, the second section of the barrel, and the first section of the barrel, and the first section of the barrel is heated to 255°C , Heating the second section of the barrel to 250°C, heating the third section of the barrel to 230°C; heating the nozzle of the injection molding machine to 230°C; heating the fixed mold in the injection mold to 75°C, and the moving mold to 60°C;

[0027] (3) Plasticization: add the PP material pretreated in step (1) to the barrel treated in step (2), and heat to a molten state;

[0028] (4) Clamping: the clamping time is 2s;

[0029] (5) I...

Embodiment 2

[0035] An injection molding process of PP material parts for plastic valves, said process comprising the steps of:

[0036] (1) Raw material pretreatment: preheat the PP material to 90°C after drying for 1 hour;

[0037] (2) Injection molding machine and injection mold pretreatment: along the direction from the feed port to the nozzle, the barrel in the injection molding machine is the third section of the barrel, the second section of the barrel, and the first section of the barrel, and the first section of the barrel is heated to 250 ° C. , Heating the second section of the barrel to 245°C, heating the third section of the barrel to 230°C; heating the nozzle of the injection molding machine to 220°C; heating the fixed mold in the injection mold to 70°C, and the moving mold to 55°C;

[0038] (3) Plasticization: add the PP material pretreated in step (1) to the barrel treated in step (2), and heat to a molten state;

[0039] (4) Clamping: the clamping time is 3s;

[0040] (5...

Embodiment 3

[0046] An injection molding process of PP material parts for plastic valves, said process comprising the steps of:

[0047] (1) Raw material pretreatment: preheat the PP material to 75°C after drying for 1 hour;

[0048] (2) Injection molding machine and injection mold pretreatment: along the direction from the feed port to the nozzle, the barrel in the injection molding machine is the third section of the barrel, the second section of the barrel, and the first section of the barrel, and the first section of the barrel is heated to 255 ° C. , Heating the second section of the barrel to 255°C, heating the third section of the barrel to 240°C; heating the nozzle of the injection molding machine to 240°C; heating the fixed mold in the injection mold to 80°C, and the moving mold to 65°C;

[0049] (3) Plasticization: add the PP material pretreated in step (1) to the barrel treated in step (2), and heat to a molten state;

[0050] (4) Clamping: the clamping time is 1s;

[0051] (5...

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PUM

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Abstract

The invention relates to the technical field of plastic valves, in particular to a PP material part injection molding process for a plastic valve. The PP material part injection molding process comprises the following steps: (1) raw material pre-treatment; (2) injection molding machine and injection mould pre-treatment; (3) plastifying; (4) mould closing; (5) injecting; (6) pressure maintaining; (7) cooling; (8) mould opening; and (9) ejecting. According to the PP material part injection molding process, process steps are simple and convenient to realize, the production period is short, and a utilization rate of equipment can be effectively increased; surface quality and mechanical properties of injection molded parts are remarkably improved by combining the characteristic of the PP material and the shape dimension of the manufactured plastic valve injection molded parts, and reasonably setting temperature, pressure and time at each stage, so that post processing of the injection molded parts is facilitated, dimension requirements needed for assembly easily reach, and the surface aesthetic degree of products is good.

Description

technical field [0001] The invention relates to the technical field of plastic valves, in particular to an injection molding process of PP material parts for plastic valves. Background technique [0002] As the proportion of plastic pipelines in cold and hot water supply and industrial pipeline engineering applications continues to increase, the quality control of plastic valves in plastic pipeline systems is becoming more and more important. Due to the advantages of light weight, corrosion resistance, no scale adsorption, integrated connection with plastic pipelines and long service life, plastic valves are widely used in water supply (especially hot water and heating) and other industrial fluids. In the pipeline system, its advantages in application are unmatched by other valves. The types of plastic valves in the world mainly include ball valves, butterfly valves, check valves, diaphragm valves, gate valves and globe valves. The structural forms mainly include two-way, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29C45/76B29C45/78B29C45/77B29B13/06B29K23/00
CPCB29C45/00B29C45/76B29C45/77B29C45/78B29C2045/0096B29C2945/76498B29C2945/76531B29C2945/76561B29K2023/12B29L2031/7506
Inventor 戚金枝
Owner 埃维柯塑料科技(安徽)有限公司
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