CN101347993A - Mold needle point glue flow channel structure - Google Patents

Abstract

The present invention discloses a mold pin-point glue flow channel structure, which is suitable for a mold structure. The mold structure includes a female mold core and a male mold core. The flow channel structure is set in the female mold core. The channel structure includes: a channel, the bottom of the channel is arc-shaped, and the arc is bent toward the bottom of the channel; a first protrusion, the first protrusion is connected with the bottom of the channel, the first A section of a protrusion is an inverted trapezoid, and the two hypotenuses of the inverted trapezoid cut the arc at the bottom end of the above-mentioned flow channel; a second protrusion, the second protrusion is a cylinder, and the second protrusion The top circular surface is connected to the bottom surface of the first protrusion, the diameter of the cylinder is the diameter of the bottom surface of the first protrusion, and the bottom end of the second protrusion is a glue inlet. In this way, it can be solved that the feed head cannot be completely broken when the mold is opened after cooling, and there is a very raised margin on the product surface, as well as the sharp corner of the sharp iron around the runner mouth after the finished product is formed many times. was worn away, resulting in undercut problems.

Description

Mold needle point glue flow channel structure

【Technical field】

The invention relates to the field of moulds, in particular to a mold pin-point glue-injecting runner structure.

【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. . And if it is a mold with two-color glue feeding, if the first glue feeding head cannot be completely broken, it will cause the second glue feeding molding to be unable to cover the very raised margin formed by the first molding.

As shown in FIG. 1 , it is a cross-sectional view of the structure of the needle-point glue-feeding runner and its detailed structure in the prior art. The product 100 is located between the male mold core 102 and the female mold core 101, and the flow channel 1 is set in the female mold core 101. The flow channel 1 is used to inject the feed material into the mold cavity during needle point injection. The flow channel 1 The runner opening 10 is a contracting end, the runner opening 10 is in the shape of an inverted trapezoid, the top of the two hypotenuses of the inverted trapezoid is curved in an arc, and the two hypotenuses are tangent to the curved portion of the arc. When performing needle-point injection, the rubber is injected into the cavity through the flow channel 1, 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. When the runner opening 10 is pulling the material, it is easy to cause the feed head of the product 100 to not be completely broken, and the remaining material remains on the contact surface of the runner opening 10 and the product 100, thereby causing a very raised margin on the product surface. And the master mold core 101 has sharp irons 103 around the runner opening 10. After the finished product is formed many times, its sharp corners are worn off due to friction, resulting in undercuts, and the runner opening 10 is not easy to break.

In view of this, it is really necessary to provide a mold needle point glue flow channel structure, which can solve the above problems.

【Content of invention】

The purpose of the present invention is to provide a mold needle-point glue-feeding flow channel structure, which can solve the problem that the feed head cannot be completely broken when the mold is opened after cooling, leaving a very raised margin on the product surface At the same time, it can solve the problem that after the finished product is formed many times, the sharp corners of the sharp iron around the runner mouth of the mother mold are worn off, resulting in undercuts and the runner mouth is not easy to break.

In order to achieve the above-mentioned purpose, the mold needle-point glue flow channel structure provided by the present invention is suitable for a mold structure, the mold structure includes a female mold core and a male mold core, and the flow channel structure is arranged on the female mold core. Inside, the runner structure includes:

A flow channel, the bottom end of the flow channel is in the shape of an arc, and the arc is bent toward the bottom end of the flow channel;

A first protruding part, the first protruding part is connected to the bottom end of the flow channel, the section of the first protruding part is an inverted trapezoid, and the two hypotenuses of the inverted trapezoid are cut with the arc at the bottom end of the above-mentioned flow channel;

A second protruding part, the second protruding part is a cylinder, the second protruding part is connected with the bottom surface of the first protruding part through its top circular surface, and the diameter of the cylinder is the diameter of the bottom surface of the first protruding part , the bottom end of the second protrusion is the glue inlet.

Compared with the prior art, the structure of the needle-point glue-feeding flow channel provided by the present invention has a second protrusion, which can solve the problem that the feed head cannot be completely broken when the mold is opened after cooling. There is a very raised margin on the surface of the product; at the same time, due to the existence of the second protrusion, there is no longer a sharp iron around the runner mouth of the master mold core, so as to avoid the mold core being stuck at the runner mouth after multiple moldings of the finished product. The sharp corners of the surrounding sharp irons are worn off, resulting in undercuts and the problem that the runner mouth is not easy to break.

In order to have a further understanding of the purpose of the present invention, structural features and functions thereof, the detailed description is as follows in conjunction with the accompanying drawings:

【Description of drawings】

FIG. 1 is a cross-sectional view showing the structure of the needle-point glue-feeding flow channel of the prior art and its detailed structure.

FIG. 2 is a cross-sectional view showing the structure of the mold needle point glue flow channel and its detailed structure according to a preferred embodiment of the present invention.

【Detailed ways】

Please refer to FIG. 2 , which is a cross-sectional view showing the structure of the needle-point glue-injection flow channel of the mold and its detailed structure according to a preferred embodiment of the present invention.

In order to achieve the above-mentioned purpose, the mold pin-point glue flow channel structure provided by the present invention is suitable for a mold structure, which includes a female mold core 202 and a male mold core 203, and the product 201 is formed by the female mold core 202 And a male mold core 203, the runner structure is located in the female mold core 202, in this preferred embodiment, the runner structure includes:

A flow channel 2, the bottom end of the flow channel 2 is arc-shaped, and the arc is bent toward the bottom end of the flow channel;

A first protrusion 20, the first protrusion 20 is connected to the bottom end of the flow channel. arc cut;

A second protruding part 200, the second protruding part 200 is a cylinder, the second protruding part 200 is connected with the bottom surface of the first protruding part 20 through its top circular surface, and the diameter of the cylinder is the first protruding part The diameter of the bottom surface of the protruding part 20, and the bottom end of the second protruding part 200 is the glue inlet.

Compared with the prior art, the structure of the needle-point glue-feeding flow channel provided by the present invention has a second protrusion 200, so that the feed head can be completely broken when the mold is opened after cooling. , there will not be a very raised margin on the surface of the product 201; at the same time, due to the existence of the second protrusion 200, there is no longer a sharp iron around the runner mouth of the master mold core 202, and it is changed to the one shown in the figure Buffer block 204, the buffer block 204 is smoother than the sharp iron, so as to avoid the sharp corners of the sharp iron around the runner mouth of the female mold core 202 after the finished product is formed many times, being worn off, resulting in undercuts and the problem that the runner mouth is not easy to break. If it is a mold with two-color injection, the first injection head can be completely broken, even if it can be completely broken, there is only a small amount of protrusion, so as to avoid the second injection molding The very convex margin formed by the first molding cannot be covered.

Claims (1)

1. A mold needle-point glue flow channel structure, suitable for a mold structure, the mold structure includes a female mold core, a male mold core, the flow channel structure is arranged in the female mold core, characterized in that , the runner structure includes: A flow channel, the bottom end of the flow channel is in the shape of an arc, and the arc is bent toward the bottom end of the flow channel; A first protruding part, the first protruding part is connected to the bottom end of the flow channel, the section of the first protruding part is an inverted trapezoid, and the two hypotenuses of the inverted trapezoid are cut with the arc at the bottom end of the above-mentioned flow channel; A second protruding part, the second protruding part is a cylinder, the second protruding part is connected with the bottom surface of the first protruding part through its top circular surface, and the diameter of the cylinder is the diameter of the bottom surface of the first protruding part , the bottom end of the second protrusion is the glue inlet.

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