CN213830134U

CN213830134U - Injection mold with inner side wall inlet gate

Info

Publication number: CN213830134U
Application number: CN202022800634.9U
Authority: CN
Inventors: 章庆华
Original assignee: Isen Precision Industrial Shenzhen Co ltd
Current assignee: Isen Precision Industrial Shenzhen Co ltd
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-07-30
Anticipated expiration: 2030-11-28

Abstract

The utility model provides an injection mold of runner is advanced to inside wall, including front mould benevolence, back mould benevolence, oblique ejector pin and runner ejector pin, be formed with sprue and die cavity in front mould benevolence and the back mould benevolence, still including submarine gate and second grade runner, submarine gate extends to one side of oblique ejector pin, the terminal inside wall that extends to the die cavity of second grade runner, and the second grade runner locates the one end that oblique ejector pin is close to submarine gate. According to the injection mold with the inner side wall entering the sprue, the glue entering through the submarine sprue is changed into the angle and the position through the secondary sprue, so that the glue can be finally filled in the position of the inner side wall of the glue part, and the upper position and the lower position of the injection mold can be reasonably adjusted according to the appearance requirement of the glue part; meanwhile, the back-off area between the secondary sprue and the rubber part ensures that the rubber part and the secondary sprue can be demoulded together in an inclined ejection mode; the shape of the secondary sprue can be wider than that of a common sprue, and cold materials can be well stored and injection molding pressure can be reduced, so that the appearance quality and stability of the rubber part are ensured.

Description

Injection mold with inner side wall inlet gate

Technical Field

The utility model relates to an injection mold technical field, in particular to injection mold of runner is advanced to inside wall.

Background

The rubber part produced by using the injection mold mode can be filled into the cavity only by the rubber material in a molten state through the sprue. That is, the gate is connected with the plastic part but not belongs to the plastic part, and the gate has a residual mark after being removed. In addition, the cross-sectional area of the gate is usually much smaller than that of the runner, and the speed of the rubber material flowing through the gate is very high, so that the defect of poor air marks on the part of the product which is directly impacted by the gate is caused. The gate of the injection molded part is not usually located at a position where the product has an important appearance.

Fig. 1 shows a glue piece. The upper surface (surface A) of the rubber part and the upper half part (surface B) of the peripheral side surface are main appearance surfaces, the lower half part (surface C) of the peripheral side surface is a covered part in product assembly, but the product is visible when being taken out, and certain appearance requirements are met, namely, the surface C cannot have residual marks of a pouring gate. The pouring gate generally selected, such as a small water gap, is directly arranged on the surface A, so that the pouring gate is not suitable; the side gate and the side submerged gate are arranged on the surface C or the surface B, and obvious marks are generated after the gates are removed, so that the side gates and the side submerged gate are not suitable for use; when the ox horn gate and the submerged thimble enter the inner surface D shown in FIG. 2, the gate faces the surface A, so that obvious air lines or poor injection lines are generated on the important surface A.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection mold of runner is advanced to inside wall to solve current injection mold and lead to the product to produce obvious gas line or spray the bad problem of line just face-to-face with the runner easily.

The utility model provides an injection mold of runner is advanced to inside wall, including front mould benevolence, back mould benevolence, oblique ejector pin and runner ejector pin, front mould benevolence with be formed with sprue and die cavity in the back mould benevolence, still include with sprue end-to-end connection's submarine gate and with the second grade runner that submarine gate connects, submarine gate extends to one side of oblique ejector pin, the end of second grade runner extends to the inside wall of die cavity, just the second grade runner is located oblique ejector pin is close to submarine gate's one end.

According to the injection mold with the inner side wall entering the sprue, the glue entering through the submarine sprue is changed into the angle and the position through the secondary sprue, so that the glue can be finally filled in the position of the inner side wall of the glue part, and the upper position and the lower position of the injection mold can be reasonably adjusted according to the appearance requirement of the glue part; meanwhile, the back-off area between the secondary sprue and the rubber part ensures that the rubber part and the secondary sprue can be demoulded together in an inclined ejection mode; the shape of the secondary sprue can be wider than that of a common sprue, and cold materials can be well stored and injection molding pressure can be reduced, so that the appearance quality and stability of the rubber part are ensured.

Further, the sprue is transversely arranged, one end of the submarine gate is connected with the sprue, and the other end of the submarine gate gradually extends downwards to be connected with the secondary gate.

Furthermore, the cross section of the secondary gate is J-shaped, and the bent part of the secondary gate is close to the inner side wall of the cavity.

Further, the shapes of the cross base surfaces of the secondary gate and the submarine gate are V-shaped.

Further, the caliber of the secondary sprue is larger than that of the submarine sprue.

Drawings

FIG. 1 is a side view of a prior art product;

FIG. 2 is a bottom view of a prior art product;

fig. 3 is a schematic partial structural view of an injection mold with an inner sidewall sprue according to a first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the injection mold with the inner sidewall entering the gate in FIG. 3 after glue feeding;

FIG. 5 is a schematic diagram of the injection mold of FIG. 4 after demolding.

Description of the main element symbols:

oblique ejector rod	10	Submarine gate	13	Second waste material	100
						Main runner	11	Two-stage pouring gate	14	Rubber part	200
Die cavity	12	Runner ejector rod	20	First waste material	300

The following detailed description of the invention will be further described in conjunction with the above-identified drawings.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 3 to 5, an embodiment of the present invention provides an injection mold with an inner sidewall entering gate, including a front mold core (not shown), a rear mold core (not shown), an inclined ejector rod 10 and a runner ejector rod 20, wherein a main runner 11 and a cavity 12 are formed in the front mold core and the rear mold core, the injection mold further includes a submarine gate 13 connected to an end of the main runner 11 and a secondary gate 14 connected to the submarine gate 13, the submarine gate 13 extends to one side of the inclined ejector rod 10, an end of the secondary gate 14 extends to an inner sidewall of the cavity 12, and the secondary gate 14 is disposed at one end of the inclined ejector rod 10 close to the submarine gate 13.

In the injection mold with the inner side wall entering the sprue, the glue entering through the submarine gate 13 is changed into an angle and a position through the secondary sprue 14, so that the glue can be finally filled in the position of the inner side wall of the glue part 200, and the upper position and the lower position of the injection mold can be reasonably adjusted according to the appearance requirement of the glue part 200; meanwhile, the reverse buckling area between the secondary sprue 14 and the rubber part 200 ensures that the rubber part 200 and the secondary sprue 14 can be demoulded together in an inclined jacking mode; the shape of the secondary gate 14 may be wider than that of a general gate, and it is possible to store cold material and reduce injection pressure well, thereby ensuring the appearance quality and stability of the plastic part 200, wherein the inverted area is an area at the upper end of an inward flange at the lower end of the plastic part 200.

Specifically, the rubber material forms first waste 300 in secondary runner 14, forms second waste 100 in sprue 11, forms rubber part 200 in die cavity 12, and during the drawing of patterns, oblique ejector pin 10 drives first waste 300 and separates with rubber part 200, and runner ejector pin 20 drives second waste 100 and breaks away from with first waste 300, realizes automatic drawing of patterns.

Specifically, in this embodiment, the main runner 11 is transversely arranged, one end of the submarine gate 13 is connected to the main runner 11, and the other end of the submarine gate gradually extends downwards to be connected to the secondary gate 14, so as to change the glue feeding direction for the first time, thereby reducing the injection pressure.

Specifically, in this embodiment, the shapes of the cross-sectional surfaces of the secondary gate 14 and the submarine gate 13 are "V" to change the glue feeding direction for the second time, thereby reducing the injection pressure.

Specifically, in this embodiment, the cross section of the secondary gate 14 is "J", and the bent portion of the secondary gate 14 is close to the inner side wall of the cavity 12, so as to change the glue feeding direction for the third time, thereby reducing the injection pressure.

Specifically, in this embodiment, the aperture of the secondary gate 14 is larger than the aperture of the submarine gate 13, so as to increase the volume of the secondary gate 14, and to better store the cold material and reduce the injection pressure, thereby ensuring the appearance quality and stability of the rubber part 200.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an injection mold of runner is advanced to inside wall, includes front mould benevolence, back mould benevolence, oblique ejector pin and runner ejector pin, front mould benevolence with be formed with sprue and die cavity in the back mould benevolence, its characterized in that, still include with sprue end-to-end connection's submarine gate and with the second grade runner that submarine gate connects, submarine gate extends to one side of oblique ejector pin, the end of second grade runner extends to the inside wall of die cavity, just the second grade runner is located oblique ejector pin is close to submarine gate's one end.

2. An injection mold having an inner sidewall gating apparatus as claimed in claim 1, wherein the main runner is disposed laterally, and the submarine gate is connected to the main runner at one end and gradually extends downward to be connected to the secondary gate at the other end.

3. The inner sidewall gating injection mold of claim 1, wherein the secondary gate has a cross-sectional shape of "J" and the bent portion of the secondary gate is adjacent to the inner sidewall of the cavity.

4. The inner sidewall gating injection mold of claim 1 wherein the secondary gate and the floor of the submarine gate are "V" shaped.

5. The inner sidewall gating injection mold of claim 1, wherein the secondary gate has a larger bore than the submarine gate.