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Manufacturing technology of threading box

A manufacturing process and threading box technology, applied in the direction of coating, etc., can solve the problems of complicated labor, the quality and quantity of plastic parts cannot meet the needs of production development, etc., achieve excellent high-frequency insulation performance, save human resources and time, and make Sophisticated effect

Inactive Publication Date: 2015-01-28
JIANGSU HAIWEI GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional method of plastic mold design is to rely on the designer's experience, skills and existing design data, from the process calculation of the plastic parts to the design drawing of the mold , relying entirely on manual labor, the manufacture of plastic molds requires professionals to pay a lot of complicated labor, so the quality and quantity of plastic parts are far from meeting the needs of production development

Method used

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  • Manufacturing technology of threading box

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Effect test

Embodiment 1

[0026] b. Melting temperature: The melting point of PP is 160°C, and the decomposition temperature is 350°C. The temperature setting during injection processing should not exceed 275°C, and the temperature of the melting section should be 240°C;

[0027] c. Mold temperature: The mold temperature is 50°C. For those with high size requirements, use a high mold temperature. The core temperature is more than 5°C lower than the cavity temperature;

[0028] d. Injection pressure: use a higher injection pressure of 15000bar and a holding pressure of about 80% of the injection pressure, turn to holding pressure at 95% of the full stroke, and use a longer holding time;

[0029] e. Injection speed: In order to reduce internal stress and deformation, high-speed injection should be selected. Runner and gate: the diameter of the runner is 4-7mm, the length of the needle gate is 1mm, the diameter can be as small as 0.7mm, and the thickness of the rib is 50 %, for products made of homopolyme...

Embodiment 2

[0038] b. Melting temperature: The melting point of PP is 170°C, and the decomposition temperature is 350°C. The temperature setting during injection processing cannot exceed 275°C, and the temperature of the melting section is preferably 240°C;

[0039] c. Mold temperature: The mold temperature is 70°C. For those with high size requirements, use a high mold temperature. The core temperature is more than 5°C lower than the cavity temperature;

[0040] d. Injection pressure: use a higher injection pressure of 1650bar and a holding pressure of about 80% of the injection pressure, turn to holding pressure at 95% of the full stroke, and use a longer holding time;

[0041] e. Injection speed: In order to reduce internal stress and deformation, high-speed injection should be selected. Runner and gate: the diameter of the runner is 4-7mm, the length of the needle gate is 1.2mm, the diameter can be as small as 0.7mm, and the thickness of the rib is 55%, for products made of homopolyme...

Embodiment 3

[0050] b. Melting temperature: The melting point of PP is 175°C, and the decomposition temperature is 350°C. The temperature setting during injection processing cannot exceed 275°C, and the temperature of the melting section is preferably 240°C;

[0051] c. Mold temperature: The mold temperature is 90°C. For those with high size requirements, use high mold temperature. The core temperature is more than 5°C lower than the cavity temperature;

[0052] d. Injection pressure: use a higher injection pressure of 1800bar and a holding pressure of about 80% of the injection pressure, turn to holding pressure at 95% of the full stroke, and use a longer holding time;

[0053] e. Injection speed: In order to reduce internal stress and deformation, high-speed injection should be selected. Runner and gate: the diameter of the runner is 7mm, the length of the needle gate is 1.5mm, the diameter can be as small as 0.7mm, and the thickness of the rib is 60% , products made of homopolymer PP, t...

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Abstract

The invention discloses a manufacturing technology of a threading box. The manufacturing technology comprises the following steps of dry treatment, melting temperature, mold temperature, injection pressure, injection speed, melt backpressure and aftertreatment of a product. An edge-shaped gate length is 0.5-0.7 mm; a depth is half of wall thickness; and a width is twice of the wall thickness. The mold has good exhaust property; and an exhaust vent has a depth of 0.025 mm-0.038 mm and thickness of 1.0 mm-1.5 mm. The threading box is made of polypropylene. The manufacturing technology provided by the invention is precise, is relatively little in time consumption, and saves labor source and time. The threading box is made of polypropylene. Polypropylene has good heat resistance and excellent high-frequency insulating properties, and polypropylene does not absorb water, so that the insulating properties are not influenced by humidity.

Description

[0001] technical field [0002] The invention relates to a manufacturing process of a threading box, which belongs to the field of plastic molds. Background technique [0003] The plastic industry is composed of two major systems: plastic raw materials and plastic products. The two complement each other and are indispensable. The production of plastic products is the only means to realize the value of plastic raw materials. Using various techniques to make it into a certain shape and valuable items or stereotyped materials, the production of plastic products is mainly composed of molding, machining, surface decoration, assembly and other links, an important part of which is plastic molding. [0004] The modern design and manufacture of plastic molds are closely related to the development of the modern plastics industry. All countries in the world pay great attention to the modern design and manufacturing technology of plastic molds. In recent years, foreign countries have m...

Claims

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Application Information

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IPC IPC(8): B29C45/00C08L23/12
CPCB29C45/77B29C45/2708B29C45/34B29C45/78B29C71/02B29C2945/76498B29C2945/76531B29C2945/76595B29C2945/76658B29C2945/76732B29K2023/12
Inventor 张贤
Owner JIANGSU HAIWEI GROUP
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