Preparation method of cover sealing glue layer

Abstract

The invention relates to a preparation method of a cover sealing glue layer. The preparation method is capable of realizing rapid preparation and excellent sealing effect of the cover sealing glue layer. According to the preparation method, a glue-injection machine, which is capable of realizing injection of a plurality of points of glue at the same time, is used for injection of a plurality of points of the cover sealing glue on the inner surface of a pre-heated cover in one time; and the cover sealing glue points are subjected to compression moulding using a molding press, so that an annular cover sealing glue layer is formed on the periphery of the inner surface of the cover. Rapid coating of the cover sealing glue can be realized by using the multipoint glue-injection machine, and rapid formation of the cover sealing glue layer is realized by compression moulding, so that processing is quick, and production cost is reduced. In addition, the cover sealing glue layer is uniformized because of compression moulding, and excellent sealing effect is achieved when an opening is covered by the cover.

Description

technical field [0001] The invention relates to a method for manufacturing a sealing glue layer of a can lid. The inner surface of the can lid is provided with a glue layer by means of fast injection of glue material and rapid press molding, thereby reducing the manufacturing cost and having good sealing effect. Background technique [0002] In order to obtain the sealing effect of the can lid, a layer of glue is provided on the inner periphery of the can lid, and the sealing effect is obtained by abutting the glue layer and the edge of the can mouth. The manufacturing technology of existing tank lid sealant layer is generally all the same as figure 1 , 2 , 3, and 4 show that: a machine is provided with a rotating shaft 10, the rotating shaft 10 has a turntable 11 for bearing the can lid 1, and a pneumatic cylinder 12 is arranged above the turntable 11, and the air cylinder 12 has a pressing plate 13 to suppress and position the can lid 1 , and, the side of the pneumatic c...

AI Technical Summary

Problems solved by technology

[0003] (1) It is necessary to manually insert one at a time, wait for processing, injection and rotational molding, in other words, only one can be processed at a time, the processing time is more time-consuming, and the production cost is higher

[0004] (2) The glue injection machine 14 can only inject one rubber material 3 at a time, so when injecting several rubber materials, it takes a long time and the processing speed is slow

[0005] (3) It is necessary to use a low-consistency rubber material so that the dot-shaped rubber material 3 can be diffused into a circular rubber layer 4 by rotation, and a "plasticizer" needs to be added to the low-concentration rubber material, which is harmful to the human body. , this kind of can lid is not suitable for use in food cans

[0006] (4) Rotate at high speed to make dotted rubber 3 ( figure 1 Shown) spreads in a circular adhesive layer 4 ( figure 2 shown), the centrifugal force will also cause the glue to form a diffusion layer 5 on the convex wall 2 of the can lid 1, and this diffusion layer 5 will affect the smooth rotation of the lid when it is closed and opened.

Moreover, only relying on the centrifugal force of rotation to diffuse, the adhesive layer 4 formed by it will have the problem of unevenness, causing the surface to be uneven and affecting the sealing effect

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