久久精品久久精品久久精品 I 色在线视频观看 I 亚洲黄色天堂 I 夜夜爱夜夜做夜夜爽 I 国产精品入口网站7777 I 免费一级黄色 I 综合伊人久久在 I 国产成网站18禁止久久影院 I 久久精品免视看国产成人明星 I 日本黄色软件 I 亚洲精品久久在线 I 精品少妇一区二区三区四区五区 I 国产黄视频在线 I 九九九免费观看视频 I 91插插插插插 I 在线国产二区 I 91国产片 I 国产一区二区三区视频在线 I 亚洲精品中文字幕无码蜜桃 I 精品亚洲精品 I 国产久艹视频 I 国产三级大全 I 精品久久久久国产免费第一页 I a级毛片,黄,免费观看 m I 欧美伦理片免费 I 国产精品狼人久久久久影院 I 日本又白又嫩水又多毛片 I 无码人妻精品中文字幕免费东京热 I 98久久久 I 1314全毛片 I 99亚州精品一区区三区 I 女人av天天堂 I 日本高清久久天堂 I 国产精品天干天干在观线 I ass极品水嫩小美女ass

Plastic screw production process

1. Preparation of raw materials

Plastic pellets are mixed with other additives to make pellets suitable for the injection molding process.

2. heating and melting

The particle material is placed in the hopper of the injection molding machine and turned into a molten state by heating and melting.

3. injection molding

The molten nylon is injected into the mold, and the cavity in the mold is filled to form the shape of the screw.

4. Cooling and curing

Wait for the plastic screw to cool and cure in the mold, take out the mold, you can get the plastic screw shape.

5. Follow-up Procedure

According to needs, plastic screws can be processed, heat treatment and other follow-up treatment to meet their specific application needs.

Guangzhou Best Rubber & Plastic Co., Ltd. has more than 20 years of experience in custom processing of plastic screws, with more than 2,000 square meters of physical processing factory, but also has professional production and processing equipment, as well as professional design team, can provide customers with satisfactory products and services.

Precautions should be taken when processing plastic screws

1. When selecting materials, it is necessary to select the appropriate material type and characteristics to ensure that the products produced have excellent performance.

2. In the process of processing, it is necessary to select the corresponding processing technology according to the characteristics of the material, the requirements of the product and the requirements of the processing equipment.

3. In the molding process, it is necessary to strictly control the processing temperature and pressure to ensure that the product has a good surface finish and dimensional accuracy.

The thread processing of plastic parts needs attention

1.The tool for turning plastic threads must be sharp to prevent the rebound of turning thermoplastics and turning thermoset plastics due to large cutting force caused by tooth collapse.

2. When turning thermoset plastic threads, it is necessary to use a small radial front Angle or negative edge Angle, and to control the depth of the cutting tool (ap=0.l~0.5mm), increase the number of cutting times to maintain the complete shape of the teeth.

3.High-speed steel tap tapping, cutting speed is 3~10m/min; When the carbide tap is tapped, the cutting speed is 20~30m/min. Cutting fluid is generally selected water or oil.

4.In order to prevent the thermosetting laminated plastic with glass fiber as the base material from peeling off when processing threads and reducing waste products, a grinding head can be installed on the lathe for grinding processing.

What are the factors affecting the sliding teeth of plastic screw holes

1. Mold design

The design of die is one of the important factors affecting the sliding teeth of screw holes. If the mold design is not reasonable, such as thread depth, Angle, diameter and other aspects do not meet the requirements, it will cause the screw hole to slip.

2. Plastic materials

The hardness, strength and toughness of plastic materials will affect the quality of screw holes. If the plastic material is too hard or too strong, it is easy to cause the screw hole to slip.

3. Injection molding process

Injection molding process is also one of the important factors affecting the quality of screw holes. For example, the improper setting of injection speed, pressure, temperature and other parameters may cause the product to slip teeth.

4.Thread tool

The use of inappropriate or wear tools to process threads can also lead to product slip problems.