A kind of production process of bag

Abstract

The invention discloses a luggage production technique. According to the luggage production technique, mixed raw materials of acrylonitrile-butadiene- styrene (ABS) and polycarbonate (PC) are adopted, so that the injection molding difficulty in the production technique is overcome while the structural strength and the shock resistance are guaranteed; a temperature control device for a mold is added in the technological process so as to control the temperature of the circumferential wall of a forming cavity of the mold before the raw materials enter the forming cavity of the mold, so that the headmost raw materials are kept in a molten state for a period of time after entering the forming cavity of the mold, and cooling forming is conducted after all the raw materials enter the forming cavity of the mold, the situation that the thickness of luggage is not uniform due to the time difference between the raw materials firstly entering the mold and the raw materials finally entering the mold is eliminated, the consistency of the cooling time is kept, the rejection rate of luggage injection molding is decreased easily, and the production cost is better controlled.

Description

technical field [0001] The invention relates to the technical field of production technology, more specifically, it relates to a production technology of bags. Background technique [0002] As the main equipment for travel, luggage plays an extremely important role in the journey, and providing excellent protection for luggage is the first priority. Therefore, it is required not only to have accommodation, but also to have functions such as anti-extrusion, waterproof, and anti-collision. Especially the luggage should accommodate luggage, so reducing the weight of the luggage itself to the greatest extent is also what people are pursuing. [0003] With the continuous improvement of people's living standards, high-grade ABS boxes have become the main luggage materials that people like. At present, the ABS bags commonly sold on the market are mainly made of resin materials composed of three materials: acrylonitrile (A), butadiene (B) and styrene (S). And rigid material. The ...

AI Technical Summary

Problems solved by technology

However, although PC material has good mechanical properties, its flow properties are poor and the injection molding process is difficult

[0005] The box body of the existing trolley case adopts a plastic-absorbing process to form a flat plate into a groove-shaped box body. After forming, the excess material at the port of the groove-shaped box body is cut off and polished, which leads to waste of corner materials. The cost increases and the production process is long. The patent document with the application number 201010613220.3 discloses a trolley case blow molding production process, including the following production process, ① extruding PC raw materials into the trolley case mold from the injection port in a molten state ; ②Blow molding from the mold injection port of the trolley case, the pressure of the blow molding is 0.6-0.8MPa, the molding temperature of the trolley case is 230-260°C, and the molding time of the trolley case is 2 to 3 minutes; ③ Take the blow-molded trolley case out of the mold; ④ Cut the trolley case

In the injection molding process, because the raw material in the molten state has a very high temperature, and the temperature of the mold is lower than that of the raw material in the molten state, there is a huge temperature difference between the two, and the raw material is slowly extruded through the screw. In the molding cavity of the mold, there is a certain time process. There is a time difference between the raw materials entering the mold first and the raw materials entering the mold last. The above technical solution does not control the temperature of the molding cavity of the mold. Through rapid cooling, the bag is formed from a molten state to a solid state, and due to the existence of this time difference, the cooling time is inconsistent, so that the thickness of the formed bag is uneven, which has a great impact on the quality of the bag, resulting in higher manufacturing The failure rate brings greater production cost pressure to the enterprise. In summary, there are improvements

Images