In-mold cold cutting stub bar sprue driving device

Abstract

The utility model discloses an in-mold cold cutting stub bar sprue driving device. The in-mold cold cutting stub bar sprue driving device sequentially comprises a female mold plate, a male mold plate and mold feet from top to bottom, a female mold core, a female mold pressing insert and a female spring are arranged in the female mold plate; a male mold core, a male mold punching insert and a male spring are arranged in the male mold plate; the female die pressing cut-in sub and the male die core abut against a product, the male die punching cut-in sub and the female die core abut against a runner, and in-die separation between the product and the runner is achieved under the matched acting force of the female die pressing cut-in sub and the male die punching cut-in sub; an ejector pin, an ejector plate assembly and a return pin are arranged in the mold foot, the lower end of the ejector pin is fixed in the ejector plate assembly, and the upper end of the ejector pin penetrates through the male mold plate; the ejector pin plate assembly is movably mounted below the male mold plate through the return pin, so that the ejector pin has an extending position for ejecting a product or a runner and a resetting position hidden in the male mold plate. The problem that in the prior art, during injection molding production, a product and a sprue stub bar are separated, investment is too high is solved, machining cost is low, and maintenance and installation are easy.

Description

Technical Field

[0001] The utility model relates to an in-mold cold-cut material head gate driving device, belonging to the technical field of injection molds. Background Art

[0002] At present, plastic products are closely related to human life, and plastic products are widely used in various fields of life. The injection molding product injection method and the injection nozzle form are diversified according to the use and function of the plastic product. In order to reduce the workload of removing the gate stub, the mold can use the hot runner method of injection, so that after the product is formed, there is no need for manual secondary shearing to remove the gate stub. The mold can also use a cold runner and cooperate with automated tooling equipment to remove the gate stub. Both methods of removing the gate stub are costly and require large investments, especially when the product customer demand is small, the cost investment pressure is more obvious. At this time, in order to save investment costs, manual shearing with nozzle pliers is often used to separate the product from the stub. This method can reduce the investment in hardware equipment, but it will increase labor costs and the labor intensity of workers is high. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an in-mold cold-cut sprue gate drive device, which can realize the separation of the product and the runner in the mold, solve the problem of excessively high investment cost in the prior art for separating the product and the sprue sprue during injection molding production, and is stable and reliable, has low processing cost, and is easy to maintain and install.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] The utility model discloses an in-mold cold-cut material head gate driving device, which comprises a female mold plate, a male mold plate and a mold foot in sequence from top to bottom; a flow channel is arranged between the female mold plate and the male mold plate;

[0006] The female mold plate is provided with a female mold core, a female mold pressing cut-in and a female spring, and the female mold pressing cut-in is movably arranged in the female mold core through the female spring; the male mold plate is provided with a male mold core, a male mold punching cut-in and a male spring, and the male mold punching cut-in is movably arranged in the male mold core through the male spring; the female mold pressing cut-in and the male mold core are respectively against the product, and the male mold punching cut-in and the female mold core are respectively against the flow channel, and the in-mold separation between the product and the flow channel is achieved under the cooperative force of the female mold pressing cut-in and the male mold punching cut-in;

[0007] An ejector pin, an ejector plate assembly and a return pin are provided in the mold foot. The lower end of the ejector pin is fixed in the ejector plate assembly, and the upper end of the ejector pin passes through the male mold plate. The ejector plate assembly is movably installed under the male mold plate through the return pin, so that the ejector pin has an extended position for ejecting products or runners and a reset position hidden in the male mold plate.

[0008] Furthermore, the number of the ejector pins is not less than 3, the upper ends of the ejector pins abut against the product or the flow channel, and at least one ejector pin has its upper end abut against the flow channel.

[0009] Furthermore, one side of the female mold pressing cutter is adjacent to one side of the male mold punching cutter, and a punching gap between the female mold pressing cutter and the male mold punching cutter is 0.2mm-0.3mm.

[0010] Furthermore, a female countersunk hole cooperating with the female mold pressing and cutting sub is provided in the female countersunk hole, and a female avoidance position is provided in the female countersunk hole, and the height of the female avoidance position corresponds to the punching stroke of the female mold pressing and cutting sub when it is working;

[0011] The punching stroke of the mother mold pressing and cutting sub-mold during operation is greater than the gate thickness of the runner by 1.5 mm.

[0012] Furthermore, a male countersunk hole cooperating with the male die punching insert is provided in the male die core, and a male avoidance space is provided in the male countersunk hole, and the height of the male avoidance space corresponds to the punching stroke of the male die punching insert when working;

[0013] The punching stroke of the male die punching insert is greater than the gate thickness of the runner by 1.5 mm.

[0014] Furthermore, it also includes an upper fixing plate and a lower fixing plate; the female mold plate is installed below the upper fixing plate, and the male mold plate is installed above the lower fixing plate through mold feet.

[0015] Furthermore, the ejector plate assembly comprises an upper ejector plate and a lower ejector plate, the lower end of the ejector passes through the upper ejector plate, and the lower end of the ejector is in an inverted T-shape abutting against the upper surface of the lower ejector plate.

[0016] Furthermore, the elastic force of the female spring is greater than twice the sum of the gravity of the female mold cutting insert and the flow channel; the elastic force of the male spring is greater than twice the sum of the gravity of the male mold punching insert and the flow channel.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The in-mold cold-cut sprue gate drive device of the present application, firstly, realizes the in-mold separation between the product and the runner through the coordinated impact of the female mold pressure cutting member and the male mold punching cutting member; secondly, the ejection of the product and the runner is realized by the ejector pin. The device solves the problem of high investment cost in the prior art for separating the product and the gate sprue during injection molding production. It is stable and reliable in the production process, has low processing cost, is easy to maintain and install, and can greatly reduce the mold cost and the maintenance cost in the later production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1: is a mold closing state diagram of the in-mold cold-cut sprue gate driving device provided in the embodiment;

[0020] Figure 2 It is an enlarged view of the mold core part of the mold closing state of the in-mold cold cutting head gate driving device provided in the embodiment;

[0021] Figure 3 : is a mold opening state diagram of the in-mold cold-cut sprue gate driving device provided in the embodiment;

[0022] Figure 4 It is a state diagram of the ejector pin of the in-mold cold-cut sprue gate driving device provided in the embodiment ejecting the product and the runner;

[0023] Figure 5 It is an enlarged view of the mother mold core part of the mold opening state of the in-mold cold cutting head gate driving device provided in the embodiment;

[0024] Figure 6 It is an enlarged view of the male mold core part of the mold opening state of the in-mold cold cutting head gate driving device provided in the embodiment;

[0025] In the figure: 1. Lower fixed plate; 2. Mold foot; 3. Lower ejector plate; 4. Upper ejector plate; 5. Male mold plate; 6. Female mold plate; 7. Upper fixed plate; 8. Female mold core; 9. Female mold pressing cut-in; 10. Male mold core; 11. Male mold punching cut-in; 12. Female spring; 13. Female avoidance space; 14. Ejector; 15. Runner; 16. Product; 17. Gate; 18. Return pin; 19. Male avoidance space; 20. Male spring. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0027] This embodiment provides a driving device for a cold-cut sprue gate 17 in a mold, which includes a female mold plate 6, a male mold plate 5 and a mold foot 2 from top to bottom; a flow channel 15 is provided between the female mold plate 6 and the male mold plate 5;

[0028] A female mold core 8, a female mold pressing and cutting sub-piece 9 and a female spring 12 are arranged in the female mold core 8 through the female spring 12; a male mold core 10, a male mold punching and cutting sub-piece 11 and a male spring 20 are arranged in the male mold core 10 through the male spring 20; the female mold pressing and cutting sub-piece 9 and the male mold core 10 are respectively abutted against the product 16, and the male mold punching and cutting sub-piece 11 and the female mold core 8 are respectively abutted against the flow channel 15, and the in-mold separation between the product 16 and the flow channel 15 is achieved under the cooperation force of the female mold pressing and cutting sub-piece 9 and the male mold punching and cutting sub-piece 11;

[0029] An ejector pin 14, an ejector plate assembly and a return pin 18 are provided in the mold foot 2. The lower end of the ejector pin 14 is fixed in the ejector plate assembly, and the upper end of the ejector pin 14 passes through the male mold plate 5. The ejector plate assembly is movably installed under the male mold plate 5 through the return pin 18, so that the ejector pin 14 has an extended position for ejecting the product 16 or the runner 15 and a reset position hidden in the male mold plate 5.

[0030] The technical concept of the utility model is as follows: first, the in-mold separation between the product 16 and the runner 15 is achieved through the cooperation of the female mold press cutter 9 and the male mold punch cutter 11; second, the ejection of the product 16 and the runner 15 is achieved through the design of the ejector pin 14 and the ejector plate assembly. The device solves the problem of high investment cost in the separation of the product 16 and the gate 17 in the injection molding production of the prior art. It is stable and reliable in the production process, has low processing cost, is easy to maintain and install, and can greatly reduce the mold cost and the maintenance cost in the later production process.

[0031] Specifically, Figure 1 As shown, the device also includes an upper fixing plate 7 and a lower fixing plate 1; the female template 6 is installed below the upper fixing plate 7 to fix the female template 6. The male template 5 is installed above the lower fixing plate 1 through the mold foot 2 to fix the male template 5.

[0032] like Figure 2 As shown, a female countersunk hole cooperating with the female mold pressing cutter 9 is provided in the female countersunk hole, and a female avoidance position 13 is provided in the female countersunk hole. The height of the female avoidance position 13 corresponds to the punching stroke S of the female mold pressing cutter 9 when working;

[0033] The punching stroke S of the female mold pressing and cutting sub 9 when working is greater than the thickness of the gate 17 of the flow channel 15 by 1.5 mm. The punching stroke S of the female mold pressing and cutting sub 9 when working is designed according to the specific size of the flow channel 15.

[0034] Furthermore, a male countersunk hole matching with the male die punching insert 11 is provided in the male die core 10, and a male avoidance space 19 is provided in the male countersunk hole, and the height of the male avoidance space 19 corresponds to the punching stroke S of the male die punching insert 11 when working;

[0035] The punching stroke S of the male die punching insert 11 when working is greater than the thickness of the gate 17 of the flow channel 15 by 1.5 mm. The punching stroke S of the male die punching insert 11 when working is designed according to the specific size of the flow channel 15.

[0036] One side of the female mold pressing and cutting sub-piece 9 is adjacent to one side of the male mold punching and cutting sub-piece 11, and the punching clearance between the female mold pressing and cutting sub-piece 9 and the male mold punching and cutting sub-piece 11 is 0.2mm-0.3mm. When the injection molding is completed and the mold is opened to the punching stroke, the female mold pressing and cutting sub-piece 9 always presses the product 16 under the thrust of the female spring 12, and the female mold core 8 keeps pressing the flow channel 15. Correspondingly, the cavity of the male mold core 10 also supports the product 16, and the male mold punching and cutting sub-piece 11 applies pressure upward to the flow channel 15 under the thrust of the male spring 20, so that the connection between the product 16 and the flow channel 15 is broken under the coordinated force of the female mold pressing and cutting sub-piece 9 and the male mold punching and cutting sub-piece 11, so as to achieve the separation of the product 16 and the flow channel 15 in the mold.

[0037] Specifically, the elastic force of the female spring 12 is greater than twice the sum of the weights of the female die cut-in 9 and the flow channel 15; the elastic force of the male spring 20 is greater than twice the sum of the weights of the male die cut-in 11 and the flow channel 15. The elastic force of the female spring 12 or the male spring 20 depends on the size of the spring. A spring of appropriate size is selected according to actual conditions to ensure sufficient impact to separate the product 16 and the flow channel 15.

[0038] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the number of ejector pins 14 is not less than 3, and the upper end of the ejector pin 14 abuts against the product 16 or the flow channel 15, and at least one ejector pin 14 abuts against the flow channel 15. In this embodiment, the number of ejector pins 14 is 3, of which one ejector pin 14 is used to abut against the flow channel 15, and the other two ejector pins 14 are used to abut against the product 16. The specific number of ejector pins 14 can be selected according to actual conditions.

[0039] The ejector plate assembly includes an upper ejector plate 4 and a lower ejector plate 3. The lower end of the ejector 14 passes through the upper ejector plate 4. The lower end of the ejector 14 is in an inverted T shape and abuts against the upper surface of the lower ejector plate 3. The design of the ejector plate assembly ensures the stability of the ejector 14.

[0040] The specific working principle is as follows: The mold closing state is as follows: Figure 1 and Figure 2 As shown, at this time, it is in the reset position hidden in the male mold plate 5, and the female mold pressing and cutting sub-piece 9 and the male mold punching and cutting sub-piece 11 are not affected by elastic force and are respectively at the upper end of the female countersunk hole and the lower end of the male countersunk hole. When the mold is opened to the punching stroke S, the mold opening state is as follows Figure 3-6 As shown, the female mold pressing insert 9 and the male mold punching insert 11 have completed the separation of the product 16 and the runner 15 in the mold under the elastic force of the female spring 12 and the male spring 20. At this time, the protruding part of the female mold pressing insert 9 is stopped by the female countersunk hole of the female mold core 8, and the protruding part of the male mold punching insert 11 is stopped by the male countersunk hole of the male mold core 10. Continue to open the mold, and the product 16 remains on the male mold side until the mold opening stops, as shown in FIG. Figure 4 As shown, the ejector pin 14 ejects the product 16 and the flow channel 15 .

[0041] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A driving device for a cold-cut sprue (17) in a mold, characterized in that: The mold comprises, from top to bottom, a female mold plate (6), a male mold plate (5) and a mold foot (2); a flow channel (15) is provided between the female mold plate (6) and the male mold plate (5); The female mold plate (6) is provided with a female mold core (8), a female mold pressing cut-in (9) and a female spring (12), and the female mold pressing cut-in (9) is movably arranged in the female mold core (8) through the female spring (12); the male mold plate (5) is provided with a male mold core (10), a male mold punching cut-in (11) and a male spring (20), and the male mold punching cut-in (11) is movably arranged in the male mold core (10) through the male spring (20); the female mold pressing cut-in (9) and the male mold core (10) are respectively in contact with the product (16), and the male mold punching cut-in (11) and the female mold core (8) are respectively in contact with the flow channel (15), and under the cooperative action of the female mold pressing cut-in (9) and the male mold punching cut-in (11), the in-mold separation between the product (16) and the flow channel (15) is achieved; The mold foot (2) is provided with an ejector pin (14), an ejector plate assembly and a return pin (18); the lower end of the ejector pin (14) is fixed in the ejector plate assembly, and the upper end of the ejector pin (14) passes through the male mold plate (5); the ejector plate assembly is movably mounted below the male mold plate (5) via the return pin (18), so that the ejector pin (14) has an extended position for ejecting a product (16) or a flow channel (15) and a reset position hidden in the male mold plate (5).

2. The in-mold cold-cut sprue gate (17) driving device according to claim 1 is characterized in that: The number of the ejector pins (14) is not less than 3, and the upper ends of the ejector pins (14) abut against the product (16) or the flow channel (15), and the upper end of at least one ejector pin (14) abuts against the flow channel (15).

3. The in-mold cold-cut sprue gate (17) driving device according to claim 1 is characterized in that: One side of the female mold pressing cutter (9) is adjacent to one side of the male mold punching cutter (11), and a punching clearance between the female mold pressing cutter (9) and the male mold punching cutter (11) is 0.2 mm to 0.3 mm.

4. The in-mold cold-cut sprue gate (17) driving device according to claim 1, characterized in that: The female mold core (8) is provided with a female countersunk hole cooperating with the female mold pressing cutter (9), and the female countersunk hole is provided with a female avoidance position (13), and the height of the female avoidance position (13) corresponds to the punching stroke of the female mold pressing cutter (9) when it is working; The punching stroke of the mother mold pressing and cutting member (9) when in operation is greater than the thickness of the gate (17) of the flow channel (15) by 1.5 mm.

5. The in-mold cold-cut sprue gate (17) driving device according to claim 1, characterized in that: The male mold core (10) is provided with a male countersunk hole that cooperates with the male mold punching insert (11), and the male countersunk hole is provided with a male avoidance space (19), and the height of the male avoidance space (19) corresponds to the punching stroke of the male mold punching insert (11) when it is working; The punching stroke of the male die punch (11) when in operation is greater than the thickness of the gate (17) of the runner (15) by 1.5 mm.

6. The in-mold cold-cut sprue gate (17) driving device according to claim 1, characterized in that: It also comprises an upper fixing plate (7) and a lower fixing plate (1); the female mold plate (6) is installed below the upper fixing plate (7), and the male mold plate (5) is installed above the lower fixing plate (1) via a mold foot (2).

7. The in-mold cold-cut sprue gate (17) driving device according to claim 1, characterized in that: The ejector plate assembly comprises an upper ejector plate (4) and a lower ejector plate (3); the lower end of the ejector pin (14) passes through the upper ejector plate (4); and the lower end of the ejector pin (14) is in an inverted T-shape and abuts against the upper surface of the lower ejector plate (3).

8. The in-mold cold-cut sprue gate (17) driving device according to claim 1, characterized in that: The elastic force of the female spring (12) is greater than twice the sum of the weights of the female die pressing insert (9) and the flow channel (15); the elastic force of the male spring (20) is greater than twice the sum of the weights of the male die punching insert (11) and the flow channel (15).

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