light industry

EVA molding machine, full automatic disc to an injection molding machine, using advanced computer control system and adapt to the footwear industry and other EVA foam products production. The structure of the utility model adopts in-line, covers an area of small, easy to operate, greatly reducing product cost
Straight line type EVA injection foam molding machine can produce EVA high foam sports shoes, light shoes (MD), slippers and all kinds of EVA foam products.
Main features of EVA molding machine:
And mold system adopts hydraulic pneumatic combination, high performance for opening and closing the mould design, the four balancing cylinder balanced distribution and clamping pressure to 200t to ensure product quality.
2, the control system using industrial computer, PLC combination, the use of network management, remote control and maintenance, so that the entire control system functions more powerful.
3, injection system by high response proportional control valve, plunger type quantitative pump combination, so that the precision of injection quantity control in 2 +, to ensure the stability of product quality, improve production efficiency
4, the temperature control system uses the remote digital control module, the anti-interference ability is strong, the temperature control precision achieves 0.3 +, causes the product to reduce the temperature to cause the size deviation.
Five, double shot gun moving system using linear slide, shift rapidly, the precise positioning of each station with modulo 2 and each module can be independent injection, tooling around can be arbitrary swap injection, the first priority to flexibility, enable the production is greatly increased.

 

Working principle and its components
EVA injection molding machine process generally divided into the following steps: the lock, molding holding pressure, melt charging, cooling and molding, mold thimble. Every movement completion time, pressure, speed, position, etc. several parameters of the subtle, that is in a position of displacement have corresponding pressure and velocity, and in different locations and time the pressure and velocity is variable.
Principle of frequency conversion and energy saving of EVA molding machine
EVA molding machine is the use of quantitative pump oil, injection molding process of each action on speed and pressure requirements are not the same, it is through injection molding machine of proportional valve with adjustable weir of the excess oil flows back to the oil tank, in the whole process, the rotational speed of the motor is constant, so the oil volume is fixed, and because the action is intermittent, and not the full load, so quantitative oil supply has great waste of space, according to the measured at least 30%. Energy-saving inverter is for this waste of space, real-time detection from EVA molding machine CNC system of proportional pressure and rate of flow signal and adjust the action of various conditions required for motor speed (flow control), so that the pump out of the flow and pressure, just to meet the system needs, and in the non operating state (mainly in cooling state), make the motor to stop running, so energy-saving space is further increased, the general system by two oil pump motor oil independence. A pump control of the site of injection mould, control and displacement of double gun and another pump. Therefore, the frequency conversion and energy saving transformation of EVA molding machine can bring great energy saving effect.

Control system of frequency conversion speed regulating energy-saving device
330S series inverter can change the output voltage according to the load change, which can optimize the efficiency of the oil pump motor according to the actual operation of the machine. Inverter is detected in real time from EVA molding machine computer board gives the pressure and flow signal, EVA molding machine pressure or flow signal is 0 ~ 1a, after internal processing, different output frequency, motor speed regulation, namely: output power and pressure and flow synchronous automatic tracking control, quite quantitative pump into energy-saving type of variable pump, liquid pressure system and the operation of the machine required power matching, the elimination of the original system of high pressure overflow energy loss. Can greatly reduce the vibration of the mold, mold, stable production process, improve product quality, reduce mechanical failure, prolong the service life of the machine, and can save a large amount of electrical energy.
The transformation of the site (see below: Fuzhou Lulei Industrial Zone, Fujian Feng shoe company) 15KW+18.5KW converter two