Injection device for injection molding machine and injection molding system thereof

Abstract

The invention provides an injection device for an injection molding machine and an injection molding system thereof. The injection device comprises an injection head, an injection seat and an injection connecting pipe, wherein an air cylinder is fixed on one side, close to the injection head, of the injection seat; a backflow pipe is arranged at the bottom of a flow guide cavity in a communicating mode; a plurality of filter screen holes are formed in a filter screen plate, a plurality of cutting teeth are fixedly arranged on the inner wall of a through hole, and a heavy plate is fixedly arranged at one end, far away from the flow guide cavity, of a cutting plate; and a feeding cavity is formed in the injection connecting pipe, and a material guide connecting piece is detachably connected between an upper threaded ring and a lower threaded ring. According to the injection device for the injection molding machine and the injection molding system thereof, molten plastic can be prevented from continuously flowing out in time after injection is completed, so that the molten plastic is prevented from polluting products; and a filtering device is arranged in the injection device, so that large-particle solid substances can be prevented from blocking the injection head, the intercepted large-particle solid substances can be automatically cut off, and the injection smoothness is ensured.

Description

technical field [0001] The invention relates to the technical field of injection molding machines, in particular to an injection device for an injection molding machine and an injection molding system thereof. Background technique [0002] Injection molding machine is a main molding equipment that uses plastic molding molds to make thermoplastic or thermosetting plastics into plastic products of various shapes. When it works, it needs to melt the solid raw material, and then inject it into the mold through the feeding tube and nozzle. In the current commonly used injection molding equipment, generally after the injection is completed, the molten raw material will continue to flow out of the nozzle, especially when the viscosity of the raw material is relatively low, the phenomenon is more serious. If the outflowing raw materials adhere to the formed product, the surface of the product will be uneven and unsightly, and it is easy to get defective products. In order to solve...

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Problems solved by technology

[0004] However, there are still obvious defects in its use: 1. After the injection of the above device is completed, molten raw materials will continue to flow out of the nozzle, which will seriously affect the aesthetics of injection molding products and reduce product quality; 2. 1. Recycling materials and some stabilizers, fillers and other additives are often added to plastic raw materials. Due to the different melting points of plastic raw materials and additives, the molten colloid in the material tube cannot be fully melted under different working conditions, and there will be large Granular solid substances, when these solid substances flow through the small nozzle holes, they are easy to block the nozzle holes and lead to abnormal production. Therefore, the above-mentioned devices need to be shut down frequently during use, which is inconvenient to use and low in processing efficiency.

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