Plasticizing power and injection power cooperative type high-efficiency injection molding machine

Abstract

The invention discloses a plasticizing power and injection power cooperative type high-efficiency injection molding machine. The machine comprises a machine shell, a material cylinder, a screw rod, apressure sensor and a power system; the power system comprises a sleeve, a plasticizing driving part, a transmission part, a connecting part, a nut, and an injection driving part, the transmission part is a dual-head screw rod with the opposite thread rotation directions, one thread segment of the dual-head screw rod is matched with an inner thread pair of the sleeve, the other thread segment is matched with an inner thread pair of the nut, and the end of the other thread segment pops out of the outer end of the nut. Through joint cooperation of different rotating speeds and steering directions of the sleeve and the nut, the dual-head screw rod is driven to do liner or rotation motion, the screw rod is driven to do synchronous motion, therefore, the rated power of a motor of an injection molding unit is greatly reduced compared with that of an existing injection molding machine, at the same time, the structure is compact, a motion part is small in inertness and rapid in response, an injection molding process window can be effectively expanded, and product stability and the yield can be improved.

Description

technical field [0001] The invention belongs to the field of injection molding machines, in particular to a high-efficiency injection molding machine with synergistic plasticizing power and injection power. Background technique [0002] Injection molding machine, also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using plastic molding molds. The injection molding machine heats the plastic, applies high pressure to the molten plastic, and makes it shoot out to fill the mold cavity. [0003] Therefore, the plastic injection molding process mainly includes the plasticizing process, the loosening process and the injection process. In the plasticizing process, the screw mainly retreats and rotates around its own axis to push the molten material to the discharge end of the barrel; The loosening process is mainly to retreat to release the pressur...

AI Technical Summary

Problems solved by technology

[0004] However, at present, the injection molding machine equipment in the industry has a low utilization rate of the motor during the injection process and the plasticization process, and the power for plasticization and the power for injection work relatively independently. When plasticizing, The plasticizing motor is basically in a high load or even full load working state, and at this time the injection motor only provides a small back pressure and is basically in a no-load working state; when injecting, the injection motor is in a full load working state, while the plasticizing motor It is basically in a no-load working state. Therefore, in order to realize the above-mentioned plastic injection molding, the rated power required by the selected plasticizing motor and injection motor is relatively high, so the cost of the injection molding machine is also relatively high.

For this reason, some manufacturers have already thought of cooperating plasticizing power and injection power to complete the entire injection molding process, thereby reducing the rated power of power output and reducing costs. However, in actual operation, the structure is often complicated and difficult. control, unable to meet market demand

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