An injection mold for stacked molding

Abstract

The present invention relates to the technical field of injection molds, and more specifically, to an injection mold for stacked molding. It includes a front mold, a sliding seat, and a rear mold that are sequentially slidably connected. A first core is provided in the front mold, a second core is provided in the rear mold, a cavity and a submarine gate communicating with the cavity are provided in the sliding seat, and the first core and the second core are respectively inserted into the front and rear ends of the cavity and form a first cavity and a second cavity with the inner wall of the cavity. The product layout is stacked into two layers, so as to double the product production volume without increasing the length and width of the mold.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molds, and more specifically, to an injection mold for stacked molding. Background Art

[0002] The commonly used mold structures at present are generally single-layer structures, and the number of products produced in one parting surface varies from 8 cavities or 12 cavities per mold according to the product layout. For example, the publication number: CN207140244U discloses an automatic thread demolding mold structure for multi-cavity threaded cap-like plastic parts in one mold, including a fixed mold fixing plate and a movable mold fixing plate. A fixed mold plate is installed below the fixed mold fixing plate, and a plurality of cavities for molding plastic parts are provided in the fixed mold plate; a spacer block is fixedly connected to the movable mold fixing plate, a bearing plate is fixedly provided on the spacer block, and a plurality of core pins equal to the number of cavities are installed on the bearing plate. Threads are provided at the heads of the core pins for molding the internal threads of the plastic parts. The core pins are driven by a rotary drive mechanism to rotate synchronously to achieve demolding. A movable mold plate is fixedly provided on the bearing plate, a push plate capable of axially moving synchronously with the product is provided on the movable mold plate, an anti-rotation mechanism for restricting the rotation of the plastic part is provided on the push plate, and a limit device for restricting the moving distance of the push plate is further provided on the bearing plate. In this application, in order to improve production capacity, it is only possible to increase production capacity by increasing the number of cavities. However, increasing the number of cavities means that the length and width of the mold need to be increased, and the energy consumption of the injection molding machine needs to be increased to achieve this. Therefore, the design cost and energy consumption of the multi-cavity mold in one mold are very high. Summary of the Invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and provide an injection mold for stacked molding, which stacks the product layout into two layers, so as to double the production volume of products without increasing the length and width of the mold.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: an injection mold for stacked molding, including a front mold, a sliding seat and a rear mold that are sequentially slidably connected. A first core pin is provided in the front mold, and a second core pin is provided in the rear mold. A cavity and a submarine gate communicating with the cavity are provided in the sliding seat. The first core pin and the second core pin are respectively inserted into the front and rear ends of the cavity and form a first cavity and a second cavity between the inner walls of the cavity.

[0005] In this device, after the front mold and the rear mold are closed, injection is carried out through the submarine gate, and products are injection molded in the first cavity and the second cavity. Two identical products are molded in the two cavities respectively, and the production volume of products can be doubled without additionally increasing the length and width of the mold. After the products are molded, the submarine gate is forcibly broken, and the two groups of products and the entire runner are all left in the sliding seat. The gap between the separated sliding seats is greater than the width of the product, so that the two groups of products placed in the sliding seat can fall off smoothly, completing one production cycle.

[0006] Furthermore, the submarine gate includes a first sub-gate and a second sub-gate. A first accommodation hole matching the first sub-gate is provided in the first core, and a second accommodation hole matching the second sub-gate is provided in the second core. The first sub-gate is slidably arranged in the first accommodation hole, and the second sub-gate is slidably arranged in the second accommodation hole. The first accommodation hole communicates with the first cavity, and the second accommodation hole communicates with the second cavity. After mold clamping, the first sub-gate and the second sub-gate are respectively placed in the first accommodation hole and the second accommodation hole, and glue is injected into the first cavity and the second cavity from the side walls of the first core and the second core. During demolding, first separate the front mold from the sliding seat, and the first sub-gate placed in the first core is forcibly broken. Both groups of products and the entire runner are left in the sliding seat and the rear mold. Then separate the sliding seat from the rear mold. At this time, the second sub-gate placed in the second core is forcibly broken, and both groups of products finally remain in the sliding seat, enabling the products to be completely separated from the runner system and smoothly fall off.

[0007] Furthermore, at least two first cores are arranged in parallel in the front mold, and the number of the cavities and the second cores is the same as that of the first cores. By increasing the number of cores, the production volume of products can be increased.

[0008] Furthermore, the sliding seat is composed of a push plate and a slider connected. The front mold is provided with a first cavity part matching the slider, and the slider is slidably arranged in the first cavity part. After the front mold and the sliding seat are connected, the slider is sleeved in the first cavity part, and the first core is inserted into the cavity.

[0009] Furthermore, it also includes a bent pin. The two bent pins are symmetrically arranged on the rear mold. One end of the bent pin is fixedly connected to the rear mold. A guide groove is provided in the slider, and the bent pin is slidably matched with the guide groove. The bent pin plays a guiding role, and the sliding seat slides out along the direction of the bent pin during demolding.

[0010] Furthermore, the push plate is provided with a second cavity part communicating with the guide groove. The setting of the second cavity part can leave a position margin for the bent pin when the sliding seat slides for demolding or mold clamping, avoiding the bent pin being stuck during mold clamping or demolding.

[0011] Furthermore, the structures of the first cavity and the second cavity are the same. Therefore, the production volume of products can be doubled.

[0012] Furthermore, the first cavity and the second cavity are arranged in the slider. The upper end face of the slider is the first parting surface, and the lower end face of the slider is the second parting surface. The two parting surfaces are respectively an end face of the two products.

[0013] Furthermore, the submarine gate is arranged in the slider, and the submarine gate enters the first cavity and the second cavity obliquely respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In this mold, the product layout is set to stack two layers, so that without increasing the length and width of the mold, the production volume of the product is doubled. At the same time, the product can be produced on a relatively small injection molding machine, reducing energy consumption and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is Figure 1 the left view of

[0017] Figure 3 is Figure 1 the sectional view of

[0018] Figure 4 is a schematic diagram of the structure of the front mold demolding in the present invention;

[0019] Figure 5 is a schematic diagram of the structure of the front mold and the sliding seat demolding in the present invention;

[0020] Figure 6 is a schematic diagram of the structure of the front mold in the present invention;

[0021] Figure 7 is a schematic diagram of the structure of the sliding seat in the present invention;

[0022] Figure 8 is a schematic diagram of the structure of the rear mold in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be further described below in conjunction with the specific embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0025] Embodiment:

[0026] As Figure 3 shown, an injection mold for stacked molding includes a front mold 10, a sliding seat 20, and a rear mold 30 that are sequentially slidably connected. Specifically, the sliding seat 20 is composed of a push plate 202 and a slider 201 connected. The front mold 10 is provided with a first cavity 102 that matches the slider 201. The slider 201 is slidably disposed in the first cavity 102, and the slider 201 is sleeved in the first cavity 102 and can slide along the direction of the first cavity 102. It also includes a bent pin 40. Two bent pins 40 are symmetrically disposed on the rear mold 30. One end of the bent pin 40 is fixedly connected to the rear mold 30. A guide groove 2011 is provided in the slider 201. The bent pin 40 is slidably engaged with the guide groove 2011. The bent pin 40 plays a guiding role, and when demolding, the sliding seat 20 is withdrawn along the direction of the bent pin 40. The push plate 202 is provided with a second cavity 2021 that communicates with the guide groove 2011. The setting of the second cavity 2021 can leave a position margin for the bent pin 40 when the sliding seat 20 slides for demolding or mold closing, avoiding the bent pin 40 from jamming during mold closing or demolding.

[0027] In addition, in this device, as Figure 6 , 8 shown, a first core 101 is provided in the front mold 10, a second core 301 is provided in the rear mold 30, and a cavity 203 is provided in the slider 201. The first core 101 and the second core 301 are respectively inserted into the front and rear ends of the cavity 203 and respectively form a first cavity 2031 and a second cavity 2032 with the inner wall of the cavity 203. The structures of the first cavity 2031 and the second cavity 2032 are the same for producing the same product.

[0028] As Figure 5 , 7 shown, a submarine gate 204 communicating with the cavity 203 is provided in the sliding seat 20. Specifically, it is a submarine gate 204 provided in the slider 201. The submarine gate 204 includes a first sub-gate 2041 and a second sub-gate 2042. A first receiving hole 1011 matching the first sub-gate 2041 is provided in the first core 101, and a second receiving hole 3011 matching the second sub-gate 2042 is provided in the second core 301. The first sub-gate 2041 is slidably disposed in the first receiving hole 1011, and the second sub-gate 2042 is slidably disposed in the second receiving hole 3011. The first receiving hole 1011 communicates with the first cavity 2031, and the second receiving hole 3011 communicates with the second cavity 2032. After mold closing, the first sub-gate 2041 and the second sub-gate 2042 are respectively placed in the first receiving hole 1011 and the second receiving hole 3011, and glue is injected into the first cavity 2031 and the second cavity 2032 from the side walls of the first core 101 and the second core 301.

[0029] In this embodiment, the produced product features a through-hole circular part with threads on the outer circular surface. The first cavity 2031 and the second cavity 2032 are symmetrically arranged at both ends of the cavity 203. The upper end surface of the slider 201 is the first parting surface, and the lower end surface of the slider 201 is the second parting surface. The two parting surfaces are respectively one end surface of two products.

[0030] In addition, in this device, in order to improve production capacity, at least two first core pins 101 are arranged in parallel in the front mold 10. The number of cavities 203 and the second core pins 301 is the same as that of the first core pins 101. By increasing the number of core pins, the production volume of products is increased. As Figure 1 、 2 shown, in this embodiment, a total of 6 first core pins 101, 6 second core pins 301, 6 cavities 203 and corresponding submarine gates 204 are provided.

[0031] In this device, as Figure 3 shown, after the front mold 10 and the rear mold 30 are clamped, plastic is injected through the submarine gate 204, and products are injection-molded in the first cavity 2031 and the second cavity 2032. Two identical products are formed in the two cavities respectively. Without increasing the length and width of the mold, the production volume of products can be doubled. After the products are molded, demolding is carried out. When demolding, as Figure 4 shown, first, the front mold 10 is separated from the sliding seat 20, and the first sub-gate 2041 placed in the first core pin 101 is forcibly broken. Two groups of products and the entire runner are all left in the sliding seat 20 and the rear mold 30. Then, as Figure 5 shown, the sliding seat 20 is separated from the rear mold 30. At this time, the second sub-gate 2042 placed in the second core pin 301 is forcibly broken. Two groups of products finally remain in the sliding seat 20 entirely, enabling the products to be completely separated from the runner system and fall off smoothly. Through the ingenious design of the runner and the gate, the product layout is stacked into two layers up and down, so that without increasing the length and width of the mold, the production volume of products is doubled. At the same time, energy consumption is reduced and production efficiency is improved.

[0032] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An injection mold for stacked molding, characterized in that, It includes a front mold (10), a sliding seat (20), and a rear mold (30) that are sequentially slidably connected. A first core (101) is provided in the front mold (10), a second core (301) is provided in the rear mold (30), a cavity (203) and a submarine gate (204) communicating with the cavity (203) are provided in the sliding seat (20). The first core (101) and the second core (301) are respectively inserted into the front and rear ends of the cavity (203) and form a first cavity (2031) and a second cavity (2032) between the inner walls of the cavity (203). The submarine gate (204) includes a first sub-gate (2041) and a second sub-gate (2042). A first receiving hole (1011) matching the first sub-gate (2041) is provided in the first core (101), a second receiving hole (3011) matching the second sub-gate (2042) is provided in the second core (301). The first sub-gate (2041) is slidably arranged in the first receiving hole (1011), the second sub-gate (2042) is slidably arranged in the second receiving hole (3011). The first receiving hole (1011) communicates with the first cavity (2031), the second receiving hole (3011) communicates with the second cavity (2032). The sliding seat (20) is composed of a push plate (202) and a slider (201) connected. The front mold (10) is provided with a first cavity part (102) matching the slider (201). The slider (201) is slidably arranged in the first cavity part (102). It further includes a bent pin (40). Two bent pins (40) are symmetrically arranged on the rear mold (30). One end of the bent pin (40) is fixedly connected to the rear mold (30). A guide groove (2011) is provided in the slider (201). The bent pin (40) is slidably matched with the guide groove (2011). The push plate (202) is provided with a second cavity part (2021) communicating with the guide groove (2011).

2. The injection mold for stacked molding according to claim 1, characterized in that, At least two first cores (101) are arranged in parallel in the front mold (10), and the number of the cavities (203) and the second cores (301) is the same as that of the first cores (101).

3. The injection mold for stacked molding according to claim 1, characterized in that, The first cavity (2031) and the second cavity (2032) have the same structure.

4. The injection mold for stacked molding according to claim 1, characterized in that, The first cavity (2031) and the second cavity (2032) are arranged in the slider (201). The upper end surface of the slider (201) is the first parting surface, and the lower end surface of the slider (201) is the second parting surface.

5. The injection mold for stacked molding according to claim 4, characterized in that, The submarine gate (204) is arranged in the slider (201), and the submarine gate (204) respectively enters the first cavity (2031) and the second cavity (2032) obliquely.

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