Bar-shaped raw material charge mechanism of rubber injection machine

Abstract

The invention provides a bar-shaped raw material charge mechanism of a rubber injection machine, and belongs to the technical field of injection machines, aiming to solve the technical problems that the existing material charge mechanism of an injection machine can only use granular raw materials, the material charge quantity is nonuniform and the material charge error is great. The technical scheme provided by the invention is as follows: the bar-shaped raw material charge mechanism of the rubber injection machine is installed on the injection machine; a material charge hole is formed in the injection machine; and the bar-shaped raw material charge mechanism of the rubber injection machine comprises a material charge frame and a dynamic wheel group, wherein the material charge frame is horizontally arranged on the injection machine; the dynamic wheel group is axially arranged on the material charge frame in parallel, and comprises a driving wheel and a driven wheel, and the driving wheel and the driven wheel are positioned above the material charge hole; the material charge frame is provided with a control device and a counting device, wherein the control device is used for controlling the driving wheel to rotate; the counting device is used for monitoring the walking length of bar-shaped raw materials; the counting device is electrically connected with the control device; the bar-shaped raw materials pass through a clearance between the driving wheel and the driven wheel, and are driven to enter the material charge hole when the driving wheel rotates. The bar-shaped raw material charge mechanism of the rubber injection machine provided by the invention has the beneficial effects that the bar-shaped raw materials are adopted, the material charge is uniform, and the error is small.

Description

technical field [0001] The invention belongs to the technical field of injection machines, and relates to a strip raw material feeding mechanism of a rubber injection machine. Background technique [0002] The injection system is one of the most important components of the injection machine. It includes a plasticizing device and a power transmission device. The plasticizing device is composed of a feeding device, a barrel, a screw, and an injection nozzle. The rubber enters the injection device through the feeding device. The injection machine is heated and plasticized in the feeding barrel, and then under a certain pressure and speed, the molten plastic or rubber is injected into the mold cavity through the screw. It can be seen that the feeding device plays a pivotal role in the injection machine. [0003] The feeding device of the traditional injection machine is mainly to install a feeding hopper vertically at the feeding port of the injection machine. When the injection...

AI Technical Summary

Problems solved by technology

[0003] The feeding device of the traditional injection machine is mainly to install a feeding hopper vertically at the feeding port of the injection machine. When the injection machine is working, the processed rubber raw materials are manually poured into the feeding hopper. During the continuous processing, the rubber The raw materials are constantly decreasing, and the staff must continuously add raw materials to the feeding hopper; for example, the reference document CN 202241804 U discloses a horizontal injection machine feeding device, which mainly includes a feeding hopper, a feeding pipe and an injection system. The tube is connected to the injection system and the feeding hopper. There is a material observation window on the feeding tube. Through the material viewing window, the material in the feeding tube can be observed at any time, so as to take corresponding measures in time. Although this feeding device can meet the basic requirements The injection machine feeds, but the feed hopper can only hold granular materials. Due to the limited volume of the feed hopper, when the materials in the feed hopper are used up, it is necessary to manually feed the feed hopper, and the increase will increase after repeated repetitions. The work intensity of the staff is increased, not only the production efficiency is low, but also the production cost is increased invisibly, and when the granular material enters the injection system of the injection machine, the volume of the material entering the injection system is different each time and cannot be obtained. Therefore, the quality of injection molded products cannot be guaranteed, and processing raw materials into granules will invisibly increase the work intensity and cost of the staff

[0004] In response to these problems, people have invented a feeding device with a higher degree of automation. By installing a device with a higher degree of automation such as a piston on the feeding device, the injection machine can pass through these devices continuously when feeding. Conveying materials into the feeding barrel, for example, the reference document CN 202742615 U discloses a feeding device of a rubber injection molding vulcanizer, which includes a feeding barrel with an inner hollow, and a port of the feeding barrel is connected to the inlet of the injection device. The feed port is connected, and there is a piston inside the feeding barrel, and a driver is arranged outside the feeding barrel. The driver is connected to the piston and controls the axial movement of the piston in the feeding barrel. Because the piston continuously generates high and low air pressure in the feeding barrel, Therefore, the raw material can be continuously transported from the outside to the feeding barrel of the injection machine through the feeding barrel. Although this feeding device improves the degree of automation, it reduces the work intensity of the staff, reduces the production cost to a certain extent, and improves The production efficiency has been improved, but some of the above problems still cannot be solved: since the piston can only transport the raw materials into the feeding barrel of the injection machine through the principle of high and low air pressure, the amount of raw materials entering the feeding barrel each time cannot be effectively obtained. Control and cannot guarantee that the amount of raw materials fed into the barrel is consistent each time, so it is impossible to know whether the raw materials have filled the cavity of the mold, and the feeding error is large. If the cavity of the mold is not full, it must be injected twice, and The secondary injection will lead to poor integrity of the injection molded product and affect the quality of the molded product. If the cavity of the mold is full and the injection is continued, the burr of the molded product will increase, which will also affect the quality of the molded product. The burr of the product will increase the working intensity of the staff. Since the quantity and volume of each feeding cannot be estimated, the feeding speed cannot be accurately controlled. If the raw material is harder, the injection will continue. Seriously, it will block the feeding cylinder of the injection machine and cause the injection machine to stop working, which will affect the normal operation of the injection machine. Moreover, for the injection machine, the use of piston equipment will increase the cost and energy consumption of the equipment virtually.

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