Suction nozzle of sheet adhesive machine

Abstract

This invention discloses a suction mouth of a plate overlayer including a shading base a suction mouth head characterizing that the suction mouth head is formed by compounding the upper part metal matrix and the lower part suction mouth opening, the said shading base is compounded by the upper metal matrix and the lower shading layer. Both the surface and the matrix of the said suction mouth opening and the shading layer are made of dark nonmetal material which strength, hardness and rigid of unit weight is close to or over the related numbers of Cu, Al, or their ordinary alloys. The said nonmetal material is an organic polymer evenly filled with dark colors having fine mechanical strength and pigment dispersivity.

Description

【Technical field】 [0001] The invention relates to the field of placement machines for electronic assembly, in particular to the technical field of a placement machine for electronic assembly and a suction nozzle on a placement head. 【Background technique】 [0002] It is inseparable from the electronic assembly and placement machine to mount and weld components of various shapes and sizes that are getting smaller and smaller on printed circuit boards and integrated circuit chips. It is the suction nozzle installed at the end of the placement head that is picked up from the device tape or tray and brought to the correct position on the printed circuit board and integrated circuit chip that needs to be mounted. There is a vacuum air channel with a small diameter in the center of the nozzle mouth axis of the suction nozzle, which is used to form an upward suction force relative to the upper smooth surface of the sucked parts. The high standard requirements for the nozzle mouth ...

AI Technical Summary

Problems solved by technology

The high standard requirements for the nozzle mouth are: the plane of the nozzle mouth is required to be flat and smooth, so that the upper surface of the sucked parts can be as close as possible to generate sufficient vacuum and suction separation force; the hardness should not be too small, It should not be too large, so as not to damage the suction nozzle itself and wear it too fast, or easily scratch the sucked parts, resulting in denaturation and value change of parts; the dielectric constant also needs to be within a certain reasonable range, and the dielectric constant is too high , The surface of the suction nozzle is easy to accumulate static electricity on the surface of the suction nozzle. The generated static electricity is not easy to release through natural discharge, and it is easy to cause discharge damage to the sucked parts. If the dielectric constant is too low, it may become the overall leakage of the placement head The path of the suction nozzle may also cause discharge damage to the sucked parts; at the same time, it is also required that the material of the nozzle mouth has a uniform darker gray on the surface and the deep body, so that it will not be used for a period of time due to the nozzle mouth. After a period of wear and tear, the deep white layer is exposed (that is, the gray value decreases and returns to white), which makes it difficult or wrong for the optical sensor to judge between the background color of the suction nozzle and the white upper surface of the spare parts

[0003] The existing suction nozzle materials are mostly made of aluminum, copper or hard alloy materials, and it is difficult to meet the above strict requirements at the same time; The common disadvantage of these two methods is that the processing technology is too difficult, and the surface hardness of the suction nozzle is either too hard, which is easy to scratch parts, or too soft, which is easy to be worn or damaged. The bright color of the body is exposed, which reduces the efficiency of sticking and suction or interferes with the compensation of optical sensing instruments; secondly, the conductivity of metal materials is too high. Once the mouth of some nozzles is damaged, the nozzles can only be discarded as a whole and cannot be replaced. The overall service life of the nozzles is very short, resulting in serious waste of resources and increased production costs.

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