What Is a Plastic Injection Machine?

Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into plastic products of various shapes using plastic molding dies. Divided into vertical, horizontal, all-electric. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill the mold cavity.

Injection machine aka

The working principle of the injection molding machine is similar to the injection syringe. It uses the thrust of the screw (or plunger) to inject the plasticized molten state (that is, viscous flow state) into the closed mold cavity. The process of obtaining products after curing and setting.

Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding-melt plasticization-pressure injection-filling cooling-opening and taking parts. After removing the plastic part, the mold is closed and the next cycle is performed.

Injection molding machine operation items: injection molding machine operation items include control keyboard operation, electrical appliances

The energy saving of injection molding machine can be divided into two parts: one is

(1) Classification by plasticizing method

Plunger plastic injection

The special mold temperature machine for injection molding is the peripheral equipment of the injection molding machine. It is used to control the temperature of the mold. The working temperature is up to 180 . It adopts the most advanced process design in the world today. And can be configured with automatic suction backwater, full negative pressure operation, RS485 communication and other functions, injection mold temperature machine has been widely used in various injection molding enterprises.

Repair and maintenance of the injection molding machine: 1. Check whether the running mold is in a normal state: whether there is low-pressure mold clamping protection; whether the moving parts such as the guide post, the ejector rod, and the row position are worn, and is the lubrication good? It is required to refuel at least once every 12 hours, and the special structure needs to increase the number of refueling. Whether the screws and clamping clamps of the mold's fixed template are loose; normal production conditions: check whether the product defects are related to the mold; when the machine is off, check the mold and perform rust prevention treatment: wipe the cavity, core, top Remove the water from the mechanism and rows and spray the mold rust inhibitor or apply butter. After the machine is off, the mold should be placed in the designated place and records should be kept: (1) Mold status: intact or waiting for repair. (2) Anti-rust treatment method when lower mold.

2. Routine inspection every quarter: mainly cleaning and maintaining the molds that have not been used for more than two months.

2.1 Open the mold and check the internal anti-rust effect. If there is an abnormal situation, you must perform the anti-rust treatment again. The mold that has not been used for a long time must be coated with butter.

2.2 Put it back in place and make a record.

3. Maintenance precautions:

(1). Non-professional maintenance personnel or without the permission of professional maintenance personnel, may not dismantle the molds for maintenance by themselves.

(2). Minor faults in the production process can be resolved by the adjuster according to the situation. For example: 2.1 Adhesive mold for plastic inlet: Use copper needles to knock out at the feeding nozzle. Do not use hard objects such as steel needles to knock the mold. 2.2 The mold cavity has slight mold marks, and the polishing material can be selected according to the surface finish of the cavity. Polished materials such as sandpaper cannot be used on the textured surface. Generally, a copper brush dipped in diamond paste or diamond mortar is used for brushing. 2.3 Product sticky mold: Generally cover the product and ejection part with hot plastic, and eject it after cooling. Take care not to damage the mold surface if it is burned.

(3). Professionals must not change the structure at will when repairing the mold. The structure needs to be changed only after the quality engineering department agrees.

(4). To ensure the quality of maintenance, select the appropriate equipment, materials, tools and methods to solve problems, and complete them as quickly as possible.

4. Quality record:

1. Injection machine and mold maintenance record sheet.

I. Purpose: To standardize the use and maintenance of plastic injection molds, reduce mold damage, and ensure that the production quality meets customer needs.

Responsibilities: This standard must be trained by qualified injection molding technicians. 2.2 Injection foreman is responsible for implementation and inspection supervision, and is responsible for regular supervision.

Looking back at the total global injection molding machine export in 2008, it was 5.46 billion US dollars, of which Germany's injection molding machine industry ranked first in the world, and the total export accounted for the entire world.

Injection molding machine

More than 20% of the world's total exports are in an advantageous position in the global injection molding machine competition. Italy and Japan ranked second and third. The export share of injection molding machines in the United States has decreased year by year, and has fallen from 9.8% in 2000 to 5.3% in 2008. Japan's electric injection molding machines occupy an important position in the world. Among them, the share of electric injection molding machines in North America has reached about 30%. The injection molding machines in Europe, America and Japan are mainly high-tech, high-value-added models such as precision injection molding machines and large injection molding machines. After years of technology introduction and technological innovation, the manufacturing level of the Chinese plastics machinery industry in the field of low-end injection molding machines has been almost the same as that of developed countries. Coupled with the advantage of labor prices, China's low-end injection molding machine exports occupy half of the world . In addition, China's plastics machinery industry has not only made great progress in the field of mid-range injection molding machines, but also made important breakthroughs in the field of high-end injection molding machines. The market share of China's plastics machinery is expected to gradually expand.

As far as the global market structure is concerned, the continuous development of the global construction market will drive the demand for extruded products such as plastic pipes and sidings, and then promote the growth of demand for extrusion equipment. Therefore, it is expected that the global demand for extrusion equipment will exceed other types of plastic products. According to a survey by the American Industrial Market Research Corporation, demand for plastic machinery in the United States and Japan will show signs of recovery again, and demand in Western Europe will accelerate in 2009. China, India and Russia have good sales prospects for plastic machinery. Turkey, the Czech Republic, Iran, and other developing countries and regions, the demand for plastic machinery will also gradually increase.

There are many manufacturers of injection molding machines in China. According to incomplete statistics, there are more than 3,000. There are two types of structure of the injection molding machine: vertical and horizontal. According to the products produced, it can be divided into ordinary injection molding machines and precision injection molding machines. The injection volume is 18-51000g at one time; the clamping force is 30-36000kN; the processing raw materials are three types: thermosetting plastic, thermoplastic and rubber. Thermoplastics include polystyrene, polyethylene, polypropylene, nylon, polyurethane, polycarbonate, plexiglass, polysulfone, and (acrylonitrile / butadiene / styrene) copolymer (ABS). From the perspective of processed products, there are single-color, two-color general and precision plastic products.
Ordinary horizontal injection molding machines are still the dominant direction for the development of injection molding machines. There is almost no major change in their basic structure. In addition to continuing to improve their control and automation levels and reduce energy consumption, manufacturers are developing in the direction of combined series according to market changes For example, the injection molding machine of the same model is equipped with three injection devices of large, medium and small, combined into a standard type and a combined type, which increases flexibility, expands the scope of use, and improves economic efficiency.

The injection molding machine manufacturers in industrialized countries in the world are constantly improving the functions, quality, auxiliary capabilities of auxiliary equipment, and automation of ordinary injection molding machines. At the same time, we will vigorously develop and develop large injection molding machines, special injection molding machines, reaction injection molding machines and precision injection molding machines to meet the demand for the production of plastic alloys, magnetic plastics, and plastic products with inserts.
Injection molding machine is one of the fastest-growing types of plastic machinery in China's plastic machinery, and the gap between the level and industrial developed countries is small. However, it mainly refers to ordinary injection molding machines. In terms of most varieties of extra large, various special, special and precision injection molding machines, some products are still blank, which is the main gap with industrial developed countries ^[1] .