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The main characteristics of horizontal rubber injection machine
Release time
Jul 06,2021
Horizontal rubber injection machine, referred to as rubber syringe. 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.
Horizontal rubber injection machineThe main features:
1.The simplified process can achieve high temperature and rapid vulcanization of rubber products and shorten the production cycle.
2.The product size is correct, the physical and mechanical properties are uniform, and the quality is high. It is especially suitable for the molding and vulcanization of thick-walled products.
3.The operation is simple, the labor intensity is reduced, and the degree of mechanization and automation is high.
4.The mechanism of the syringe and its mold is more complex, the investment is large, the maintenance level is high, and it is mostly used for the production of large-scale molding products.
There are various 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 machine drive type, hydraulic and mechanical type; according to the style of the clamping device, there are direct pressure type, hydraulic machine, and secondary action type. According to the configuration of mechanical parts, there are horizontal, vertical, angle, multi-mode injectors, etc.
Horizontal rubber injection machineSpecification display method;
1The large injection capacity of the machine, in cubic centimeters. General equipment factories indicate that large injection volume is a deviation that occurs in the process of theoretically large injection volume, actual machine manufacturing and use, and there is a certain deviation between the actual large injection volume of the machine and the large theoretical injection volume.
The theoretical injection volume is the screw of the injection machine(Plunger)Large amount of plasticized melt that can be ejected in one large stroke(cm3). The theoretical injection volume is the main performance parameter of the injection molding machine. Through this parameter, the processing capacity of the machine can be understood, and the large quality of injection molded plastic products can be confirmed.
according to national standardsGB/T 12783-1991The theoretical injection volume is based on the mass of the material in the molten state.(G)or volume(cm3)Representation. Domestic and world countries with volume(cm3)The method of representation is more. The volume of the material is independent of the density of the molten state of the material, so this marking method is suitable for the determination of all plastics.
The theoretical injection volume calculation formula is as follows
QL-theoretical injection volume,cm3;
D-- snail team(Plunger)Diameter,cm;
S-- snail team(Plunger)Large stroke, cm.
Due to the screw(Plunger)There is a mutual movement between the outer diameter and the inner diameter of the installation gap, so when the screw(Plunger)When the melt is pushed forward, it will be affected by resistance such as nozzle diameter reduction and friction with the inner wall. Part of the material reflows in the gap. In addition, when the molten material is cooled, a certain amount of shrinkage is added. Therefore, the actual injection volume of the machine must be less than the theoretical injection volume. Must be modified to coefficient when calculatingKValue.KValue of size and screw(Plunger)The structure and parameters, outer diameter and gap, injection force, melt flow rate, back pressure, mold structure, product shape and plastic characteristics. If there is a check valve on the screw head, thenKValue is0.9. If only the return of the melt is considered,KValue is0.97.
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