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What are the classification of vertical rubber injection machine?
Release time
Aug 09,2021
Vertical rubber injection machine, referred to as rubber injector. It is a technology for the production of rubber molding products. Mainly used in the production of electrical insulation parts, shockproof pads, gaskets, soles, hole light boots and other rubber molding products. At home and abroad has been widely used.
What are the classification of vertical rubber injection machine?
There are many types of syringes in the world, which are divided according to the way of rubber plasticization, including casting tax ceremony and screw ceremony. According to the type of machine drive, hydraulic and mechanical type; according to the style of the clamping device, there are direct pressure type, hydraulic machinery, and secondary action type. According to the configuration of mechanical parts, there are horizontal, vertical, angle, multi-mode injectors, etc.
How is the calculation method of vertical rubber injection machine?
Vertical rubber injection machine specification display method;
1. The relatively large injection volume of the machine is in cubic centimeters. The relatively large injection indicated by the general equipment factory is the deviation occurred in the process of relatively large injection, actual machine manufacturing and use, and there is a certain deviation between the actual relatively large injection and the relatively large injection.
Injection is a relatively large plasticized melt (cm3) that the screw of the injection machine can emit in a relatively large stroke. Injection is the main performance parameter of injection molding machine. Through this parameter, the processing capacity of the machine can be understood, and the relatively large quality of injection molded plastic products can be confirmed.
According to the national standard GB/T 12783-1991, the size of the injection is expressed as the mass (G) or volume (cm3) of the molten state of the material. Domestic and world countries with volume (cm3) said the method is more. The volume of the material has nothing to do with the density of the molten state of the material, so the marking method of the vertical rubber injection machine is suitable for the determination of all plastics.
The injection calculation formula is as follows
QL-injection, cm3;
D-diameter of the conch, cm;
S-screw relatively large stroke, cm.
The vertical rubber injection machine has a mutual movement installation gap between the outer diameter and the inner diameter of the screw. Therefore, when the screw () pushes the melt forward, it will be affected by resistance such as nozzle diameter reduction and inner wall friction. Part of the material backflows in the gap. In addition, the molten material cooling to supplement a certain shrinkage. Therefore, the actual injection of the machine needs to be less than the injection. The calculation needs to be modified to the coefficient K value. The size of the K value is related to the structure and parameters of the screw (), the outer diameter and gap, the size of the injection force, the melt flow rate, the size of the back pressure, the mold structure, the product shape and the characteristics of the plastic. If there is a check valve on the screw head, the K value is 0.9. If only the reflux of the melt is considered, the K value is 0.97.
The actual injection.
If you know the quality of the plastic product, when choosing the machine, the volume of the plastic in the molten state will be converted into density. That is to say
Qs -- actual injection of injection molding machine, G;
r-density of plastic in molten state, g/cm3.
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