Special case of forming machine

1. Working principle of automatic disc type plastic injection molding machine

Molding machine frequency converter

The fully automatic disc-type plastic injection molding machine in shoe-making enterprises is the main common equipment in shoe-making enterprises, known as electric tiger. China is a big shoe-making country and has a lot of shoe-making equipment. The mechanical characteristics of the automatic disc type plastic injection molding machine (hereinafter referred to as: disc machine):

◎This machine is specially used to produce all kinds of high-grade single-color, double-color and three-color sports shoes, leisure shoes soles, boys and girls soles and other products.

◎Raw materials are suitable for the production of various thermoplastic materials such as PVC, TPR, etc.

◎This machine is controlled by computer programs (single chip microcomputer, PLC), the main and auxiliary machines are precisely controlled, easy to operate and easy to maintain.

◎Mold-closing cylinder with pressure switch design, can quickly close the mold and establish the clamping force, so that each molding can be free of burrs and ensure product quality.

◎Proportional pressure control, the injection pressure of each mold can be operated independently, which is suitable for the manufacture of products with different injection volumes.

2. The power saving principle of the disc machine

Due to the very violent mutation process in the working process of the disc machine, the impact on the machine is very large, which affects the life of the entire injection molding system. Domestic shoe-making enterprises have a lot of old equipment with low degree of automation and high energy consumption. The machine is generally designed according to the maximum production capacity. In fact, it often does not use such a large power during production. The speed of the oil pump motor remains unchanged, so the output power is almost unchanged, and there are large horses and small carts in production. Therefore, a large amount of energy is wasted.

We adopt the frequency conversion operation technology of the disc machine. The frequency converter detects the pressure and flow signal from the computer board of the disc machine in real time. The pressure or flow signal of the disc machine is 0-1A. After internal processing, different frequencies are output , to adjust the motor speed, that is: the output power is automatically tracked and controlled synchronously with the pressure and flow, which is equivalent to changing the quantitative pump into an energy-saving variable pump. The original hydraulic system matches the power required for the operation of the whole machine, eliminating the high pressure overflow of the original system loss of flow energy. It can greatly reduce the vibration of mold closing and mold opening, stabilize the production process, improve product quality, reduce mechanical failures, prolong the service life of the machine, and save a lot of electric energy. 3. The characteristics of frequency conversion and energy saving

1) The operation is simple, and it runs synchronously with the disc machine without any adjustment;

2) High reliability: the original control mode and oil circuit of the disc machine are kept unchanged; the mains/power-saving operation control mode is adopted to prevent production from being affected in case of failure;

3) Soft start: reduce machine vibration, prolong the service life of equipment and molds; effectively reduce noise and improve the working environment; the system heat is significantly reduced, and the oil temperature is stable; the service life of sealing components is extended, the downtime maintenance rate is reduced, and a lot of savings are saved Maintenance costs, while increasing the installed capacity of the transformer;

4) High rate of return: All investments are recovered in about 6 to 12 months through electricity savings.