CN219294583U

CN219294583U - Injection mold

Info

Publication number: CN219294583U
Application number: CN202223162287.7U
Authority: CN
Inventors: 吴彬; 王志华; 周晓峰; 郭辉盛; 刘爽; 王向红
Original assignee: Gree Electric Appliances Inc of Zhuhai; Gree Wuhan Electric Appliances Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Gree Wuhan Electric Appliances Co Ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-07-04
Anticipated expiration: 2032-11-22

Abstract

The utility model discloses an injection mold, comprising: a stationary mold plate; the movable template and the fixed template jointly enclose an injection molding cavity, and the injection molding cavity comprises a product cavity and a water gap runner communicated with the product cavity; the water gap thimble is movably arranged on the movable mould plate, and is provided with a material pulling groove which is positioned in the water gap runner. According to the injection mold disclosed by the utility model, the pull trough is arranged on the water gap thimble, and part of injection molding material can flow into the pull trough in the injection molding process, so that a formed structure in the pull trough and a product water gap form a whole, and the pulling force on the product water gap is effectively ensured to be reliable in the second stage of mold opening ejection, thereby ensuring the reliable separation of a product and the product water gap, and ensuring that the injection mold can meet the requirements of automatic stable and efficient production.

Description

Injection mold

Technical Field

The utility model relates to the technical field of injection molding equipment, in particular to an injection mold.

Background

Based on the design of the existing secondary ejection mould of the mould, the automatic separation of the product and the water gap during the production of the mould is realized. However, according to the traditional back-off structure of the water gap of the injection molding product, long-term production practice shows that the product and the water gap can be automatically separated in a short period of the mold, but the back-off of the water gap of the product is gradually worn after being strongly pulled for many times through the demolding after long-time production, when the back-off mold resistance of the water gap of the product is too small, during the ejection second stage of the mold, the water gap of the product and the product can be ejected together, so that the production abnormality problem that the product and the water gap of the product are not separated and still integrated is caused.

Disclosure of Invention

The utility model discloses an injection mold, which solves the problem that a product and a product water gap cannot be separated in the prior art.

The utility model discloses an injection mold, comprising:

a stationary mold plate;

the movable template and the fixed template jointly enclose an injection molding cavity, and the injection molding cavity comprises a product cavity and a water gap runner communicated with the product cavity;

the water gap thimble is movably arranged on the movable mould plate, and is provided with a material pulling groove which is positioned in the water gap runner.

The pull trough is provided with a first side wall and a second side wall which are opposite, the first side wall is positioned on one side, close to the fixed template, of the second side wall, and the height of the first side wall is smaller than that of the second side wall.

The depth of the pulling groove gradually increases along the direction from the first side wall to the second side wall.

And the opening of the material pulling groove faces the ground side direction of the injection mold.

The injection mold further comprises a blanking mechanism, the opening of the material pulling groove faces the direction of the top side of the injection mold, and the blanking mechanism can enable materials to be separated from the material pulling groove.

The injection mold further comprises a thimble fixing plate, the thimble fixing plate is located on one side, away from the fixed die plate, of the movable die plate, a rotation stopping groove is formed in the thimble fixing plate, a rotation stopping matching structure is arranged on the water gap thimble, and the rotation stopping matching structure is located in the rotation stopping groove.

The injection mold further comprises a top plate, the top plate is located on one side, far away from the movable mold plate, of the thimble fixing plate, a yielding groove is formed in the top plate and is communicated with the rotation stopping groove, and the rotation stopping matching structure can move freely between the yielding groove and the rotation stopping groove.

The top plate is provided with a yielding insert, the first end of the yielding insert is positioned in the yielding groove, the distance that the first end of the yielding insert stretches into the yielding groove is adjustable, and the water gap thimble is connected to the first end of the yielding insert.

The injection mold further comprises a movable mold bottom plate, the movable mold bottom plate is located on one side, away from the thimble fixing plate, of the top plate, and the second end of the abdication insert can be in butt fit with the movable mold bottom plate.

The section of the water gap thimble at the material pulling groove part is Z-shaped.

According to the injection mold disclosed by the utility model, the pull trough is arranged on the water gap thimble, and part of injection molding material can flow into the pull trough in the injection molding process, so that a formed structure in the pull trough and a product water gap form a whole, and the pulling force on the product water gap is effectively ensured to be reliable in the second stage of mold opening ejection, thereby ensuring the reliable separation of a product and the product water gap, and ensuring that the injection mold can meet the requirements of automatic stable and efficient production.

Drawings

FIG. 1 is a schematic view of an injection mold according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a nozzle spike according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of an injection mold according to an embodiment of the present utility model;

FIG. 4 is a partial schematic view at A of FIG. 3;

FIG. 5 is a schematic diagram of a second stage of mold opening and ejection of an injection mold according to an embodiment of the present utility model;

FIG. 6 is a partial schematic view at B of FIG. 5;

FIG. 7 is a partial schematic view at C of FIG. 5;

FIG. 8 is a schematic diagram of a third stage of mold opening and ejection of an injection mold according to an embodiment of the present utility model;

FIG. 9 is another schematic view of an injection mold according to an embodiment of the present utility model in a third stage of mold opening ejection;

FIG. 10 is a partial schematic view at D of FIG. 9;

legend: 1. a stationary mold plate; 2. a movable template; 31. a product cavity; 32. a gate runner; 4. a water gap thimble; 41. a material pulling groove; 42. a first sidewall; 43. a second sidewall; 5. a thimble fixing plate; 51. a rotation stopping groove; 44. a rotation stopping matching structure; 6. a top plate; 61. a relief groove; 7. a yielding insert; 8. and a movable die bottom plate.

Detailed Description

The utility model is further illustrated, but is not limited to, the following examples.

As shown in fig. 1 to 10, the present utility model discloses an injection mold comprising: a stationary platen 1; the movable mold plate 2 and the fixed mold plate 1 jointly enclose an injection molding cavity, wherein the injection molding cavity comprises a product cavity 31 and a water gap runner 32 communicated with the product cavity 31; the water gap thimble 4 is movably arranged on the movable mould plate 2, and a pull trough 41 is arranged on the water gap thimble 4, and the pull trough 41 is positioned in the water gap runner 32. The gate ejector pin 4 is provided with the gate pulling groove 41, part of injection molding materials can flow into the gate pulling groove 41 in the injection molding process, so that a formed structure in the gate pulling groove 41 and a product gate form a whole, the pulling force on the product gate is effectively guaranteed to be reliable in the second stage of die opening ejection, reliable separation of the product and the product gate is guaranteed, and the injection molding die can meet automatic stable and efficient production.

In the first stage of die sinking ejection, the product thimble ejects the movable mould board 2 with the product, the mouth of a river thimble 4 keeps motionless this moment, draw the shaping structure in the silo 41 and also keep motionless, and then guarantee that the product mouth of a river keeps motionless, product and product mouth of a river separation, in the second stage of die sinking ejection, the product thimble continues ejecting the product, mouth of a river thimble 4 also drives the product mouth of a river simultaneously and ejects, because product and product mouth of a river have already separated, draw silo 41 and also break away from in the mouth of a river ejector pin hole on the movable mould board 2 gradually along with drawing silo 41, draw the removal of shaping structure in silo 41 at this moment not in the restriction, make the shaping structure in the silo 41 and the product mouth of a river break away from, accomplish the ejecting of product mouth of a river.

In order to ensure that the injection molding material can smoothly flow into the draw-off groove 41, the draw-off groove 41 is provided with a first side wall 42 and a second side wall 43 which are opposite, the first side wall 42 is positioned on one side of the second side wall 43 close to the fixed mold plate 1, and the height of the first side wall 42 is smaller than the height of the second side wall 43. At this time, a space is reserved between the first side wall 42 and the inner wall of the gate hole on the movable mold plate 2, and injection molding materials can flow into the material pulling groove 41 through the space, so that an integrated structure of the molding structure in the material pulling groove 41 and the product gate is realized, and the pulling force of the product gate is ensured to separate the product gate from the product.

The depth of the pull trough 41 increases gradually in the direction from the first side wall 42 to the second side wall 43. The forming structure in the pull trough 41 forms an inclined plane which can be abutted with the bottom surface of the pull trough 41 between the first side wall 42 and the second side wall 43, when a product is ejected, an extrusion force is generated between the inclined plane and the pull trough 41, and the component force of the extrusion force in the ejection direction limits the movement of the forming structure and the product water gap, so that the separation of the product water gap and the product is realized.

As an embodiment, as shown in fig. 1 to 8, the opening of the pull chute 41 faces the ground side direction of the injection mold. When the material pulling groove 41 completely protrudes out of the movable template 2, the product water gap and the forming structure in the material pulling groove 41 can be automatically separated from the material pulling groove 41 under the action of self gravity, so that ejection and blanking of the product water gap are realized.

As another embodiment, as shown in fig. 9 and 10, the injection mold further includes a discharging mechanism, the opening of the material pulling groove 41 faces the direction of the top side of the injection mold, and the discharging mechanism can separate the material from the material pulling groove 41. When the material pulling groove 41 protrudes out of the movable mould plate 2 completely, the product water gap and the forming structure in the material pulling groove 41 can still be fixed on the water gap thimble 4, and the blanking mechanism can acquire the product water gap and the forming structure in the material pulling groove 41 on the water gap thimble 4 and drive the product water gap and the forming structure to separate from the water gap thimble 4 so as to finish ejection and blanking of the product water gap.

The injection mold further comprises a thimble fixing plate 5, the thimble fixing plate 5 is located on one side, away from the fixed mold plate 1, of the movable mold plate 2, a rotation stopping groove 51 is formed in the thimble fixing plate 5, a rotation stopping matching structure 44 is arranged on the water gap thimble 4, and the rotation stopping matching structure 44 is located in the rotation stopping groove 51. The rotation of the water gap thimble 4 is limited by utilizing the cooperation of the rotation stopping cooperation structure 44 and the rotation stopping groove 51, so that the rotation of the material pulling groove 41 caused by the rotation of the water gap thimble 4 is avoided, the fixation of the opening direction of the material pulling groove 41 is ensured, and the production reliability of the injection mold is further ensured.

The injection mold further comprises a top plate 6, the top plate 6 is located at one side, far away from the movable mold plate 2, of the thimble fixing plate 5, a yielding groove 61 is formed in the top plate 6, the yielding groove 61 is communicated with the rotation stopping groove 51, and the rotation stopping matching structure 44 can freely move between the yielding groove 61 and the rotation stopping groove 51. The ejector pin of the injection molding machine can be abutted on the top plate 6 to push the product ejector pin and the water gap ejector pin 4 to move so as to realize ejection of the product and the water gap, and because the yielding groove 61 is arranged on the top plate 6, the product ejector pin can move under the movement of the top plate 6 to realize ejection of the product in the first stage of die sinking ejection, and meanwhile, the water gap ejector pin 4 enters the yielding groove 61, so that the product water gap can not move along with the product to realize separation of the product and the product water gap, and the top plate 6 continues to move under the action of the ejector pin of the injection molding machine in the second stage of die sinking ejection, and at the moment, the water gap ejector pin 4 can not move towards the inside of the yielding groove 61 again, so that the top plate 6 also drives the water gap ejector pin 4 to move, and the product water gap is synchronously ejected so as to realize ejection of the product and the product water gap.

The top plate 6 is provided with a yielding insert 7, a first end of the yielding insert 7 is located in the yielding groove 61, the distance that the first end of the yielding insert 7 stretches into the yielding groove 61 is adjustable, and the nozzle thimble 4 is connected to the first end of the yielding insert 7. The water gap thimble 4 can be ejected out of the relief groove 61 to ensure injection reliability in the injection molding process of an injection mold by utilizing the relief insert 7, and meanwhile, when the mold is opened and ejected out, the relief insert 7 can drive the water gap thimble 4 to keep motionless so as to generate relative movement relative to the top plate 6, so that the water gap thimble 4 enters the relief groove 61.

The injection mold further comprises a movable mold bottom plate 8, the movable mold bottom plate 8 is located on one side, away from the thimble fixing plate 5, of the top plate 6, and the second end of the abdication insert 7 can be in butt fit with the movable mold bottom plate 8. During die assembly, the movable die bottom plate 8 extrudes the second end of the abdication insert 7, so that the first end of the abdication insert 7 moves, the gate ejector pin 4 is ejected out of the abdication groove 61, and injection molding reliability is guaranteed.

As shown in fig. 2, the section of the nozzle thimble 4 at the portion of the pull groove 41 is Z-shaped. It can also be said that a Z-shaped molding structure is additionally molded on the shape of the existing product nozzle, and the Z-shaped molding structure is utilized to be in clamping fit with the material pulling groove 41.

It should be understood that the above-described embodiments of the present utility model are provided by way of example only and are not intended to limit the scope of the utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Not all embodiments are exhaustive. All obvious changes or modifications which come within the spirit of the utility model are desired to be protected.

Claims

1. An injection mold, characterized in that: comprising the following steps:

a stationary platen (1);

the movable mold plate (2), the movable mold plate (2) and the fixed mold plate (1) jointly enclose an injection molding cavity, and the injection molding cavity comprises a product cavity (31) and a water gap runner (32) communicated with the product cavity (31);

the water gap thimble (4), water gap thimble (4) movably set up in on movable mould board (2), just be provided with on water gap thimble (4) and draw silo (41), draw silo (41) to be located in water gap runner (32).

2. The injection mold according to claim 1, characterized in that the pull trough (41) has opposite first and second side walls (42, 43), the first side wall (42) being located on a side of the second side wall (43) close to the stationary platen (1), and the first side wall (42) having a height smaller than a height of the second side wall (43).

3. Injection mold according to claim 2, characterized in that the depth of the pull trough (41) increases gradually in the direction from the first side wall (42) to the second side wall (43).

4. Injection mold according to claim 2, characterized in that the opening of the pull trough (41) is directed towards the ground side of the injection mold.

5. The injection mold according to claim 2, further comprising a blanking mechanism, wherein an opening of the pull trough (41) is oriented in a direction of a top side of the injection mold, and wherein the blanking mechanism is capable of separating material from the pull trough (41).

6. The injection mold according to claim 5, further comprising a thimble fixing plate (5), wherein the thimble fixing plate (5) is located at one side of the movable mold plate (2) away from the fixed mold plate (1), a rotation stopping groove (51) is formed in the thimble fixing plate (5), a rotation stopping matching structure (44) is formed in the nozzle thimble (4), and the rotation stopping matching structure (44) is located in the rotation stopping groove (51).

7. The injection mold according to claim 6, further comprising a top plate (6), wherein the top plate (6) is located at a side of the ejector pin fixing plate (5) away from the movable mold plate (2), a yielding groove (61) is formed in the top plate (6), the yielding groove (61) is communicated with the rotation stopping groove (51), and the rotation stopping matching structure (44) can move freely between the yielding groove (61) and the rotation stopping groove (51).

8. The injection mold according to claim 7, wherein a relief insert (7) is provided on the top plate (6), a first end of the relief insert (7) is located in the relief groove (61), a distance that the first end of the relief insert (7) extends into the relief groove (61) is adjustable, and the nozzle thimble (4) is connected to the first end of the relief insert (7).

9. The injection mold according to claim 8, further comprising a movable mold bottom plate (8), wherein the movable mold bottom plate (8) is located at a side of the top plate (6) away from the ejector pin fixing plate (5), and the second end of the relief insert (7) can be in abutting fit with the movable mold bottom plate (8).

10. Injection mold according to any one of claims 1 to 9, characterized in that the nozzle spike (4) has a Z-shaped cross section in the portion of the pull trough (41).