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CN-121972361-A - Screw feeding type piezoelectric injection valve

CN121972361ACN 121972361 ACN121972361 ACN 121972361ACN-121972361-A

Abstract

The invention relates to the technical field of dispensing equipment, and provides a screw feeding type piezoelectric injection valve, which comprises a base, a nozzle and a firing pin, wherein the nozzle is arranged on the bottom surface of the base, the firing pin can be arranged in the base in a reciprocating manner along the vertical direction, the feeding module comprises a cylinder body, a screw and a motor, the cylinder body is arranged above the base, the bottom of the cylinder body is fixedly connected with a runner, the runner is communicated with the nozzle, the screw is rotationally arranged through the cylinder body and is connected with the output end of the motor for pushing glue to the runner through rotation, the piezoelectric driving module comprises a valve body, a piezoelectric actuator and a displacement scaling arm, the valve body is fixedly connected to the base, the piezoelectric actuator is vertically arranged in the valve body, the displacement scaling arm is arranged between the piezoelectric actuator and the firing pin, and the displacement scaling arm is used for converting deformation of the piezoelectric actuator into reciprocating motion of the firing pin.

Inventors

  • ZHAO SHUAI

Assignees

  • 深圳市轴心压电技术有限公司

Dates

Publication Date
20260505
Application Date
20260227

Claims (8)

  1. 1. A screw fed piezoelectric jetting valve, comprising: The injection module (1) comprises a base (11), a nozzle (12) and a firing pin (13), wherein the nozzle (12) is arranged on the bottom surface of the base (11), and the firing pin (13) is arranged in the base (11) in a reciprocating manner along the vertical direction; The feeding module (2) comprises a barrel (21), a screw and a motor (23), wherein the barrel (21) is arranged above the base (11), a runner is fixedly connected to the bottom of the barrel (21), the runner is communicated with the nozzle (12), the screw is rotatably arranged on the barrel (21) in a penetrating mode and is connected with an output end (333) of the motor (23) for pushing glue to the runner through rotation; The piezoelectric driving module (3) comprises a valve body (31), a piezoelectric actuator (32) and a displacement scaling arm (33), wherein the valve body (31) is fixedly connected to the base (11), the piezoelectric actuator (32) is vertically arranged in the valve body (31), the displacement scaling arm (33) is arranged between the piezoelectric actuator (32) and the firing pin (13), and the displacement scaling arm (33) is used for converting deformation of the piezoelectric actuator (32) into reciprocating motion of the firing pin (13).
  2. 2. The screw feeding type piezoelectric injection valve according to claim 1, wherein the displacement scaling arm (33) is of a lever structure and comprises a fulcrum (331), an input end (332) and an output end (333), the fulcrum (331) is arranged on the valve body (31), the input end (332) is fixedly connected to the driving end of the piezoelectric actuator (32), the output end (333) is fixedly connected to the firing pin (13), and the fulcrum (331) is arranged on one side of the output end (333) away from the input end (332).
  3. 3. The screw feeding type piezoelectric injection valve according to claim 1, wherein a liquid storage groove (121) is formed in the nozzle (12), an injection hole (122) is formed in the lower end of the liquid storage groove (121), and the head of the firing pin (13) can extend into the liquid storage groove (121) to reciprocate.
  4. 4. A screw fed piezo jet valve according to claim 3, characterized in that the reciprocating motion of the striker (13) is configured to strike or not contact the jet orifice (122).
  5. 5. A screw fed piezo jet valve according to claim 1, further comprising a heating element (14), said heating element (14) being arranged on said barrel (21) or said base (11).
  6. 6. A screw fed piezo-electric injection valve according to claim 1, further comprising a storage module (4), said storage module (4) comprising a needle cylinder (41) and a tube (42), said tube (42) communicating said needle cylinder (41) with said cylinder (21).
  7. 7. A screw fed piezo jet valve according to claim 1, characterized in that the feed module (2) further comprises a coupling (24), the coupling (24) being arranged at the output (333) of the motor (23), the coupling (24) being fixedly connected to the screw.
  8. 8. Screw-fed piezo-electric injection valve according to claim 1, characterized in that the valve body (31) is provided with an auxiliary interface (34), which auxiliary interface (34) is connected to the piezo-electric actuator (32) by an external control line.

Description

Screw feeding type piezoelectric injection valve Technical Field The invention relates to the technical field of dispensing equipment, in particular to a screw feeding type piezoelectric injection valve. Background The piezoelectric injection valve is widely applied to precise dispensing processes in the fields of electronic manufacture, microelectronic packaging and the like due to the advantages of quick response, high precision, good repeatability and the like, and is used for injecting high-viscosity fluids such as solder paste, conductive adhesive, epoxy resin and the like. However, the existing piezoelectric injection valve is usually fed by an external pressure barrel, a gear pump or a diaphragm pump, and the problems of uneven feeding, flow fluctuation and even blockage easily occur to high-viscosity or particle-containing glue, so that the injection continuity and consistency are affected. Meanwhile, the piezoelectric actuator and the mechanical amplifying mechanism in the traditional valve body are arranged in a vertical or horizontal side-by-side mode, so that the whole structure is not compact enough and is difficult to integrate in an automation device with limited space. In addition, the viscosity of the glue is sensitive to temperature, and the existing valve body often lacks an integrated precise temperature control system, or only adopts a simple external heating mode, so that the stability of the rheological property of the glue is difficult to maintain, and the injection precision is further influenced. In terms of maintenance, the existing valve body is complex in internal structure and low in modularization degree, so that cleaning and component replacement are inconvenient, and production efficiency and equipment maintainability are reduced. Therefore, a piezoelectric injection valve which can realize stable and accurate injection of high-viscosity glue, has a compact structure, is accurate in temperature control and is convenient to maintain is needed. Disclosure of Invention The invention aims to provide a screw feeding type piezoelectric injection valve, which solves the problems of uneven feeding, easy blockage, non-compact valve body structure, inaccurate temperature control and inconvenient maintenance of high-viscosity glue in the prior art. In order to achieve the above purpose, the screw feeding type piezoelectric injection valve provided by the invention adopts the following technical scheme: The screw feeding type piezoelectric injection valve comprises an injection module, a base, a nozzle and a firing pin, wherein the nozzle is arranged on the bottom surface of the base, and the firing pin is arranged in the base in a reciprocating manner along the vertical direction; the feeding module comprises a barrel, a screw and a motor, wherein the barrel is arranged above the base, the bottom of the barrel is fixedly connected with a runner, the runner is communicated with the nozzle, the screw is rotatably arranged in the barrel in a penetrating manner and is connected with the output end of the motor, and the feeding module is used for pushing glue to the runner through rotation; The piezoelectric driving module comprises a valve body, a piezoelectric actuator and a displacement scaling arm, wherein the valve body is fixedly connected to the base, the piezoelectric actuator is vertically arranged in the valve body, the displacement scaling arm is arranged between the piezoelectric actuator and the firing pin, and the displacement scaling arm is used for converting deformation of the piezoelectric actuator into reciprocating motion of the firing pin. As optimization of the screw feeding type piezoelectric injection valve, the displacement scaling arm is of a lever structure and comprises a fulcrum, an input end and an output end, wherein the fulcrum is arranged on the valve body, the input end is fixedly connected with the driving end of the piezoelectric actuator, the output end is fixedly connected with the firing pin, and the fulcrum is arranged on one side, away from the input end, of the output end. As optimization of the screw feeding type piezoelectric injection valve, a liquid storage groove is formed in the nozzle, an injection hole is formed in the lower end of the liquid storage groove, and the head of the firing pin can extend into the liquid storage groove to reciprocate. As an optimization of the screw-fed piezoelectric injection valve, the reciprocating motion of the striker is configured to strike or not contact the injection hole. The piezoelectric injection valve is optimized by a screw feeding type piezoelectric injection valve, and further comprises a heating element which is arranged on the cylinder body or the base. The piezoelectric injection valve is optimized by a screw feeding type piezoelectric injection valve, and further comprises a storage module, wherein the storage module comprises a needle cylinder and a material pipe, and the material pipe is used