Jet type glue supply head

Abstract

The invention relates to a jet type glue supply head. The jet type glue supply head comprises a base, a heating block, a first grade displacement and amplification mechanism, a second grade displacement and amplification mechanism, a striker, a striker return spring, a nozzle, a nozzle holder and a piezoelectric ceramic block, wherein the base is provided with a gel channel, the heating block is arranged in the base, the first grade displacement and amplification mechanism is provided with a plane internal diamond frame, a right stretching arm and a left stretching arm, and the right stretching arm and the left stretching arm are symmetrically arranged on the right side and the left side of the plane internal diamond frame; the second grade displacement and amplification mechanism is provided with a plane external diamond frame, the left stretching arm and the right stretching arm are symmetrically and horizontally connected with the left and right sides of the plane external diamond frame, the upper end of the plane external diamond frame is connected with the upper part of the base, the striker is perpendicularly arranged, the upper end of the striker supports the lower end of the plane external diamond frame, and the lower part of the striker is positioned in the base; and the striker return spring is arranged between the lower end of the plane external diamond frame and the wall of the base, and is sheathed on the striker, the nozzle is arranged on the base by the nozzle holder, the nozzle is right positioned under the striker, a nozzle hole is communicated with the gel channel of the base, and the piezoelectric ceramic block is arranged in the plane internal diamond frame.

Description

technical field [0001] The invention relates to a fluid dispensing head, in particular to a jet dispensing head. Background technique [0002] Dispensing heads are commonly used equipment in electronic product processing and packaging. The dispensing methods of the existing fluid dispensing head are generally divided into contact type and non-contact type. The principle of the contact dispensing head is to push the fluid through needles of different apertures to contact the substrate and components with a certain air pressure for dispensing. This dispensing method has several disadvantages that are difficult to overcome: First, the distance between the contact dispensing valve and the component is very small during operation. If the positioning of the component or the substrate is slightly shifted or deformed, it is easy to make the Damage to the dispensing tip and substrate or component. Secondly, in contact dispensing, the amount of dispensing is usually controlled acco...

AI Technical Summary

Problems solved by technology

This dispensing method has several disadvantages that are difficult to overcome: First, the distance between the contact dispensing valve and the component is very small during operation. If the positioning of the component or the substrate is slightly shifted or deformed, it is easy to make the Damage to the dispensing tip and the substrate or component

Secondly, in contact dispensing, the amount of dispensing is usually controlled according to the viscosity of the colloid by adjusting the distance between the dispensing valve and the substrate and the relative movement speed. However, during the working process, changes in temperature will cause changes in the viscosity of the colloid. As a result, the amount of dispensing cannot be well controlled

Third, due to the dispensing of the contact nature, it is easy to cause wire drawing between the dispensing valve and the components, causing unnecessary adhesion between the substrate and the components

Fourth, because the dispensing valve has to perform a vertical movement with a large stroke every time the glue is dispensed, the efficiency of dispensing is limited

There are insurmountable problems in the dispensing machine installed with the amplifying mechanism: first, when the mechanism is installed, the amplifying mechanism has no output displacement, and the striker is in a state of close contact with the nozzle when it is installed, and the degree of close contact is not easy to control; second , the movement direction of the piezoelectric ceramic block A is inconsistent with the movement direction of the output displacement of the amplification mechanism, so the piezoelectric ceramic block A needs to be placed horizontally, and it is inconvenient to fix the piezoelectric ceramic block A. At the same time, due to the effect of gravity, the piezoelectric ceramic block The contact surface between A and the magnifying mechanism will produce certain friction; thirdly, the displacement magnification of the magnifying mechanism is low

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