CN201079998Y - Pin pot glue feeding flow passage structure - Google Patents

Abstract

The utility model relates to a novel type pinpoint rubber feeding flow channel structure, which is suitable for a die structure. The die structure comprises a female die cavity, the flow channel is arranged in the female die cavity, wherein, a contraction part is arranged at the bottom end of the flow channel, the contraction part comprises a circular arc part positioned at the top of the contraction part and bent to the bottom end of the flow channel; a convex part connected with the circular arc part, wherein a flow channel opening is arranged at the bottom end of the convex part, the cross section of the convex cross part is inverted trapezoid, and the two hypotenuses of the inverted trapezium are intercrossed with the surface of the circular arc part. When die sinking is performed in such a way, the stress points of the rubber material are relatively centralized, thus no residual stock exists at the feeding points of the product, subsequent processing to the product is not required to be performed, and therefore, the production efficiency is improved and the cost is saved.

Description

New needle point glue flow channel structure

【Technical field】

The utility model relates to the field of moulds, in particular to a needle-point glue-feeding flow channel structure which can effectively break the remaining material at the mold flow channel mouth completely.

【Background technique】

When designing the mold structure, it is necessary to optimize the design of the glue inlet, otherwise it is easy to cause the feed head of the product to not be completely broken when the mold is opened, which will affect the aesthetics of the product surface, and the product must be followed up. .

As shown in Figure 1, it is a schematic diagram of the structure of the existing mold needle-point injection flow channel; the product 13 is located between the male mold core 11 and the female mold core 12, and the flow channel 14 is arranged in the female mold core 12. The feed material is injected into the mold cavity when the needle is injected into the glue. The end of the runner 14 close to the runner opening 16 is a contraction end 15. The contraction end 15 is in the shape of an inverted trapezoid. The bottom of the inverted trapezoid is the runner opening 16. The tops of the two hypotenuses of the inverted trapezoid are curved in an arc, and the two hypotenuses are tangent to the curved portion of the arc. When performing needle point injection in this way, the rubber material is injected into the mold cavity through the flow channel 14, and the molding process of the product can be completed after cooling.

However, when the mold is opened after cooling, this kind of runner structure is likely to cause residual material on the product. Please refer to Figure 1 and Figure 2, wherein Figure 2 is a schematic diagram of a product with remaining material; the position corresponding to the runner opening 16 on the product 13 is the feed point 17, and after the product 13 is cooled and formed, it is necessary to open the mold and eject it. When the product 13 is released, when the mold is opened, since the runner mouth 16 and the feed point 17 are connected by rubber, and the shrinkage end 15 is long, the stress point of the rubber is not fixed when it is broken, so it is easy to cause the rubber to not be completely Pull off, and surplus material 18 stays on the feeding point 17. At this time, the remaining material 18 at the feeding point 17 needs to be processed subsequently, and this processing process is completed manually, thus increasing the cost of the entire molding process and affecting the aesthetics of the product.

【Content of invention】

In view of this, the utility model provides a new type of needle-point glue-feeding flow channel structure to overcome the defect of the prior art that it is easy to leave residual material at the product feeding point.

In order to achieve the above purpose, the novel needle-point glue flow path structure provided by the utility model is suitable for a mold structure, and the mold structure includes a female mold core, and the flow channel is arranged in the female mold core, wherein the flow channel A constriction is provided at the bottom of the channel, and the constriction includes: a circular arc, which is located at the top of the constriction, and the circular arc is bent toward the bottom of the flow channel; The arcs are connected, and the bottom end of the protruding part is a runner opening. The cross-section of the protruding part is an inverted trapezoid, and the two hypotenuses of the inverted trapezoid cut the surface of the arc.

Compared with the prior art, the structure of the needle-point glue-feeding channel provided by the utility model shortens the length of the entire shrinkage portion, so the stress points of the rubber material are relatively concentrated when the mold is opened, so that the product feed point There is no residual material, and there is no need for subsequent processing of the product, thereby improving production efficiency and saving costs.

【Description of drawings】

Fig. 1 is a schematic diagram of the structure of a needle-point glue-feeding flow channel in the prior art.

Fig. 2 is a schematic diagram of the glue-feeding effect of the needle-point glue-feeding channel structure in the prior art.

Fig. 3 is a schematic diagram of the structure of the needle-point glue-feeding flow channel of the present invention.

Fig. 4 is a schematic diagram of the glue-feeding effect of the needle-point glue-feeding channel structure of the present invention.

【Detailed ways】

In order to have a further understanding of the structure and technical characteristics of the present utility model, it will be described in detail below in conjunction with the accompanying drawings:

As shown in Figure 3, it is a schematic diagram of the needle point glue feeding structure provided by the utility model; the needle point glue feeding flow channel structure provided by the utility model is suitable for a mold structure, and in this embodiment the mold structure is a Three-plate mould, the mold structure includes a male mold core 21 and a female mold core 22, the product 23 is located in the cavity (not shown) between the male mold core 21 and the female mold core 22; the runner 24 is located in the female mold core 22. In the mold core 21, a constriction portion 25 is provided at the bottom end of the runner 24, and the constriction portion 25 includes: a circular arc portion 26, which is located at the top of the constriction portion 25, and the circular arc portion 26 faces the runner The bottom end is curved; a protruding part 27, which is connected to the arc part 26, the protruding part 27 has an inverted trapezoidal cross section, and the two hypotenuses of the inverted trapezoid cut the surface of the arc part 26, and The bottom end of the protruding portion 27 is a flow channel opening 28 , and the flow channel opening 28 is connected to a feed point 29 on the product 23 .

In this embodiment, the diameter of the runner opening 28 is 1.20 mm, the radius of the arc portion 26 is 1.25 mm, and the distance from the center point of the arc portion 26 to the runner opening 28 is 2.25 mm. In practical applications, the distance It can be between 1.75mm and 2.25mm; in this embodiment, the angle between the two hypotenuses of the inverted trapezoidal section of the protruding portion 27 is 35 degrees, and the angle can be between 30 degrees and 60 degrees in practical applications between.

As shown in Figure 4, it is a schematic diagram of the glue feeding effect of the new needle point glue feeding flow channel structure; because the inverted trapezoid of the protruding part 27 is cut with the surface of the arc part 26, compared with the tangent of the prior art, it shortens the The length of the entire shrinkage portion 27, so when the mold is opened, the rubber material at the runner mouth 28 is more concentrated and can be completely broken, and there is no residual material at the feed point 29.

The new needle-point inlet runner glue structure is applicable to all three-plate mold runner structures. In specific applications, it is only necessary to make appropriate adjustments to the above data according to specific conditions, and will not repeat them here.

Compared with the prior art, the new needle-point glue feeding structure provided by the present invention makes no residual material at the product feeding point, so the subsequent processing procedures are eliminated, thereby saving costs and improving production efficiency, and making the product more efficient. Aesthetics are guaranteed.

Claims (6)

1. A novel needle-point glue-feeding flow channel structure, suitable for a mold structure, the mold structure includes a female mold core, the flow channel is arranged in the female mold core, it is characterized in that the bottom end of the flow channel A constriction is provided, and the constriction includes: an arc portion, the arc portion is located at the top of the constriction portion, and the arc portion bends toward the bottom end of the flow channel; A protruding part, the protruding part is connected with the arc part, the bottom end of the protruding part is the flow channel opening, the cross section of the protruding part is an inverted trapezoid, and the two hypotenuses of the inverted trapezoid cut the surface of the arc part . 2. The novel needle-point glue-feeding channel structure according to claim 1, characterized in that: said mold structure is a three-plate mold structure. 3. The novel needle-point injection channel structure according to claim 1, characterized in that: the diameter of the channel opening is 1.20mm. 4. The novel needle-point glue-feeding channel structure according to claim 1, characterized in that: the radius of the arc portion is 1.25mm. 5 . The novel needle-point injection channel structure according to claim 4 , wherein the distance from the center of the circular arc to the opening of the channel is between 1.75 mm and 2.25 mm. 6. The novel needle-point glue-feeding channel structure according to claim 1, wherein the angle between the two hypotenuses of the inverted trapezoid is between 30 degrees and 60 degrees.

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