An automatically lockable multi-cavity injection mold

Abstract

The utility model belongs to injection mold technical field, concretely relates to a multi -cavity injection mold of automatic locking, including the upper seat plate, the upper die plate, the lower die plate and the lower seat plate that set up in proper order from top to bottom, the bottom side edge middle part of upper die plate is fixedly connected with a plurality of guide grooves, the top side edge middle part of lower die plate is fixedly connected with a plurality of guide blocks, the junction of upper die plate and lower die plate both sides symmetry is provided with a plurality of sets of locking mechanism, the locking mechanism includes the limit groove, the inside slide connection of limit groove has a pair of symmetrically arranged limit blocks, a pair of limit blocks far from the side edge between lower die plate and slide connection has the top block. The utility model has the advantages of being provided with locking mechanism, can realize the automatic mould locking of upper die plate and lower die plate, effectively improves the mould locking efficiency, is provided with a plurality of locking mechanism and can effectively improve the mould locking strength of upper die plate and lower die plate, and then improves product forming quality.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a multi-cavity injection mold that can be automatically locked. Background Technology

[0002] Injection molds are crucial process equipment in plastic molding, playing an irreplaceable role in numerous industries such as automotive, electronics, home appliances, and medical. Injection molds mainly consist of molding parts, a gating system, a cooling system, and an ejection system. The molding parts directly determine the shape and dimensional accuracy of the product; the gating system guides the molten plastic smoothly into the mold cavity; the cooling system controls the mold temperature through circulating cooling media, affecting the product molding cycle and quality; and the ejection system is responsible for pushing the molded product out of the mold.

[0003] For example, a microphone upper and lower shell dual-mold core combination mold with CN217514426U includes a panel, a sprue push plate, an upper mold plate, a lower mold plate, and an ejection mechanism. Two identical mold cores and a second mold core are provided between the upper mold plate and the lower mold plate. The sprue push plate has a main channel, and the lower end of the main channel has a first sub-channel and a second sub-channel. The lower end of the first sub-channel and the second sub-channel each has a corresponding gate. The first mold core includes an upper mold core and a lower mold core. Multiple molding cavities are formed between the upper mold core and the lower mold core. A core is provided in the molding cavity. The lower end of the lower mold core has a demolding ejector pin and a lower ejector pin.

[0004] However, the upper and lower mold plates of the above mold are connected on one side by connecting plates and bolt assemblies during molding. The connection needs to be done manually, which is inefficient. Moreover, the clamping force of the single-sided connecting plate is insufficient, which can easily lead to defects such as flash or burrs on the edges or parting surfaces of the product, affecting the product molding quality. Utility Model Content

[0005] The purpose of this invention is to solve the problems of low clamping efficiency and insufficient clamping strength of the upper and lower mold plates in existing injection molds.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatically locking multi-cavity injection mold includes an upper platen, an upper template, a lower template, and a lower base plate arranged sequentially from top to bottom. Several guide grooves are fixedly connected to the center of the bottom edge of the upper template, and several guide blocks are fixedly connected to the center of the top edge of the lower template. Several sets of locking mechanisms are symmetrically arranged on both sides of the connection between the upper and lower templates. Each locking mechanism includes a limiting groove, and a pair of symmetrically arranged limiting blocks are slidably connected inside the limiting groove. A top block is slidably connected between the edges of the pair of limiting blocks away from the lower template. An inclined surface is provided at the connection between the top block and the limiting block. A movable frame is fixedly connected to the side wall of the top block away from the lower template. A locking cylinder is fixedly connected to the side wall of the lower template, and the piston rod of the locking cylinder is fixedly connected to the movable frame.

[0008] Furthermore, the limiting groove is arranged in an "I" shape, the limiting block is arranged in a "U" shape, and a first spring is connected between the side of each limiting block facing the limiting groove and the bottom inner side of the limiting groove.

[0009] Furthermore, the upper seat plate has a liquid inlet at the top center, and the upper seat plate has an injection chamber inside, with several injection pipes connected to the bottom of the injection chamber.

[0010] Furthermore, the bottom of the upper template is fixedly connected to an upper mold core, and several sets of upper cavities are symmetrically opened on the inner side of the upper mold core. The top of the lower template is fixedly connected to a lower mold core, and several sets of lower cavities are symmetrically opened on the inner side of the lower mold core. The lower mold core is located directly below the upper mold core. The positions and shapes of the several upper cavities and lower cavities are matched, and the upper cavities and lower cavities facing each other are connected.

[0011] Furthermore, a branch channel is provided between each group of lower cavities, and the bottom end of the injection tube is connected to the middle pipeline of the adjacent branch channel.

[0012] Furthermore, cooling pipes are arranged around the inner sides of both the upper and lower mold cores. Several guide rods are vertically fixed between the bottom of the lower mold plate and the lower base plate. A top plate is horizontally slidably connected between the guide rods. A second spring is connected between the top plate and the bottom of the lower mold plate. Several sets of push rods are vertically fixed to the top plate. The top ends of the push rods extend through the lower mold plate to the bottom of the lower mold core.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The present invention relates to an automatically locking multi-cavity injection mold, which, by setting a locking mechanism, can realize automatic mold locking of the upper and lower mold plates, effectively improving the mold locking efficiency. By setting multiple sets of locking mechanisms, the mold locking strength of the upper and lower mold plates can be effectively improved, thereby improving the product molding quality.

[0015] 2. The present invention provides an automatically locking multi-cavity injection mold, which, by being equipped with a cooling pipe and an ejector pin, enables rapid molding of products and can automatically demold the molded products, thereby improving the molding efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a multi-cavity injection mold with automatic locking according to the present invention.

[0017] Figure 2 This is an enlarged structural diagram of section A of a multi-cavity injection mold with automatic locking according to this utility model.

[0018] Figure 3 This is a side view of a multi-cavity injection mold with automatic locking according to the present invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of a multi-cavity injection mold that can be automatically locked according to the present invention.

[0020] Figure 5 This is a schematic diagram of the runner structure of a multi-cavity injection mold with automatic locking according to the present invention.

[0021] In the diagram: 1. Upper base plate; 2. Lower base plate; 3. Upper mold plate; 4. Lower mold plate; 5. Liquid inlet; 6. Locking mechanism; 601. Limiting groove; 602. Limiting block; 603. First spring; 604. Top block; 605. Locking cylinder; 606. Movable frame; 7. Top plate; 8. Guide groove; 9. Guide block; 10. Guide rod; 11. Second spring; 12. Liquid injection cavity; 13. Liquid injection pipe; 14. Upper mold core; 15. Lower mold core; 16. Ejector rod; 17. Upper cavity; 18. Lower cavity; 19. Runner; 20. Cooling pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-2The automatically locking multi-cavity injection mold of this embodiment includes an upper base plate 1, an upper mold plate 3, a lower mold plate 4, and a lower base plate 2 arranged sequentially from top to bottom. Several guide grooves 8 are fixedly connected to the center of the bottom edge of the upper mold plate 3, and several guide blocks 9 are fixedly connected to the center of the top edge of the lower mold plate 4, for guiding the upper mold plate 3 and the lower mold plate 4 when the mold is closed. Several sets of locking mechanisms 6 are symmetrically arranged on both sides of the connection between the upper mold plate 3 and the lower mold plate 4 for locking the mold when the upper mold plate 3 and the lower mold plate 4 are closed. The locking mechanism 6 includes a limiting groove 601, and a pair of symmetrically arranged limiting grooves are slidably connected inside the limiting groove 601. A top block 604 is slidably connected between a pair of limiting blocks 602 on the side away from the lower template 4. An inclined surface is provided at the connection between the top block 604 and the limiting block 602. A movable frame 606 is fixedly connected to the side wall of the top block 604 away from the lower template 4. A locking cylinder 605 is fixedly connected to the side wall of the lower template 4. The piston rod of the locking cylinder 605 is fixedly connected to the movable frame 606. The limiting groove 601 is arranged in an "I" shape, and the limiting block 602 is arranged in a "U" shape. A first spring 603 is connected between the side of each limiting block 602 facing the limiting groove 601 and the bottom inner side of the limiting groove 601. During injection molding, the upper platen 1 drives the upper mold plate 3 downward to fit against the lower mold plate 4. At this time, the guide groove 8 on the edge of the upper mold plate 3 engages with the guide block 9 on the edge of the lower mold plate 4, and the bottom and top of the limiting groove 601 are connected. The tops of a pair of limiting blocks 602 enter the top of the limiting groove 601. Then, the locking cylinder 605 drives the movable frame 606 and the top block 604 to move towards the limiting groove 601. When the top block 604 moves, it squeezes the limiting blocks 602 on both sides, causing the pair of limiting blocks 602 to move towards both sides of the limiting groove 601 until the limiting blocks 602... The middle part abuts against the middle part of the limiting groove 601. At this time, the limiting block 602 set in the "U" shape can automatically lock the upper mold plate 3 and the lower mold plate 4. When locking the mold, the first spring 603 is compressed, which generates an elastic force in the opposite direction on the limiting block 602. When demolding is required after injection molding, the locking cylinder 605 is reset, which drives the top block 604 to reset. At this time, the limiting block 602 moves to the middle part of the limiting groove 601 under the elastic force of the first spring 603, so that the upper and lower ends of the limiting block 602 are separated from the upper and lower sides of the limiting groove 601. At this time, the upper mold plate 3 and the lower mold plate 4 can be separated.

[0024] Please see Figure 3-5The upper plate 1 has a liquid inlet 5 at the top center and a liquid injection chamber 12 inside. The bottom pipe of the liquid injection chamber 12 is connected to several liquid injection pipes 13. The bottom of the upper mold plate 3 is fixedly connected to the upper mold core 14. Several sets of upper cavities 17 are symmetrically opened on the inner side of the upper mold core 14. The top of the lower mold plate 4 is fixedly connected to the lower mold core 15. Several sets of lower cavities 18 are symmetrically opened on the inner side of the lower mold core 15. The lower mold core 15 is located directly below the upper mold core 14. The positions and shapes of the several upper cavities 17 and lower cavities 18 are matched, and the upper cavities 17 and lower cavities 18 are connected. A branch channel 19 is opened between each set of lower cavities 18. The bottom end of the liquid injection pipe 13 is connected to the middle pipe of the adjacent branch channel 19. During injection molding, the upper mold plate 3 and the lower mold plate 4 are fitted together. At this time, the upper mold core 14 and the lower mold core 15 on their inner sides are fitted together, so that the upper cavity 17 and the lower cavity 18 facing each other are connected. The raw material is injected into the injection cavity 12 through the liquid inlet 5. The raw material flows into the distribution channel 19 along the injection pipe 13, and then flows into the upper cavity 17 and the lower cavity 18 on both sides through the distribution channel 19. The product can be molded through the upper cavity 17 and the lower cavity 18.

[0025] Cooling pipes 20 are arranged around the inner sides of both the upper mold core 14 and the lower mold core 15. Several guide rods 10 are vertically fixed between the bottom of the lower mold plate 4 and the lower base plate 2. A top plate 7 is horizontally slidably connected between the guide rods 10. A second spring 11 is connected between the top plate 7 and the bottom of the lower mold plate 4. Several sets of ejector rods 16 are vertically fixed to the top plate 7. The top ends of the ejector rods 16 pass through the lower mold plate 4 and extend to the bottom of the lower mold core 15. During product molding, the cooling pipes 20 can achieve rapid cooling of the product, improving molding efficiency. After molding, the upper mold plate 3 and the lower mold plate 4 separate, causing the top plate 7 and ejector rods 16 to move upward, ejecting the product inside the lower cavity 18, achieving rapid demolding and effectively improving demolding efficiency.

[0026] Working principle: During injection molding, the upper platen 1 drives the upper mold plate 3 to move downwards until it fits against the lower mold plate 4. At this time, the guide groove 8 on the edge of the upper mold plate 3 engages with the guide block 9 on the edge of the lower mold plate 4, and the bottom and top of the limiting groove 601 are connected. The tops of a pair of limiting blocks 602 enter the top of the limiting groove 601. Then, the locking cylinder 605 drives the movable frame 606 and the top block 604 to move towards the limiting groove 601. When the top block 604 moves, it squeezes the limiting blocks 602 on both sides, causing the pair of limiting blocks 602 to move to both sides of the limiting groove 601 until the limiting blocks 602 are fully engaged. The middle part of 02 abuts against the middle part of the limiting groove 601. At this time, the limiting block 602 set in the "U" shape can automatically lock the upper mold plate 3 and the lower mold plate 4. When locking the mold, the first spring 603 is compressed, which generates an elastic force in the opposite direction on the limiting block 602. When demolding is required after injection molding, the locking cylinder 605 is reset, which drives the top block 604 to reset. At this time, the limiting block 602 moves to the middle part of the limiting groove 601 under the elastic force of the first spring 603, so that the upper and lower ends of the limiting block 602 are separated from the upper and lower sides of the limiting groove 601. At this time, the upper mold plate 3 and the lower mold plate 4 can be separated.

[0027] During injection molding, the upper mold plate 3 and the lower mold plate 4 are fitted together. At this time, the upper mold core 14 and the lower mold core 15 on their inner sides are fitted together, so that the upper cavity 17 and the lower cavity 18 facing each other are connected. The raw material is injected into the injection cavity 12 through the liquid inlet 5. The raw material flows into the distribution channel 19 along the injection pipe 13, and then flows into the upper cavity 17 and the lower cavity 18 on both sides through the distribution channel 19. The product can be molded through the upper cavity 17 and the lower cavity 18. During product molding, the cooling pipe 20 can realize the rapid cooling of the product, improving the molding efficiency. After molding, the upper mold plate 3 and the lower mold plate 4 are separated. At this time, the top plate 7 and the ejector rod 16 move upward, ejecting the product inside the lower cavity 18, realizing the rapid demolding of the product and effectively improving the demolding efficiency.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-cavity injection mold with automatic locking capability, characterized in that: The system includes, from top to bottom, an upper base plate (1), an upper template (3), a lower template (4), and a lower base plate (2). Several guide grooves (8) are fixedly connected to the center of the bottom edge of the upper template (3), and several guide blocks (9) are fixedly connected to the center of the top edge of the lower template (4). Several sets of locking mechanisms (6) are symmetrically arranged on both sides of the connection between the upper template (3) and the lower template (4). Each locking mechanism (6) includes a limiting groove (601), and the limiting groove (601) is internally slidably connected to... A pair of symmetrically arranged limiting blocks (602) are provided. A top block (604) is slidably connected between the side edges of the pair of limiting blocks (602) away from the lower template (4). An inclined surface is provided at the connection between the top block (604) and the limiting block (602). A movable frame (606) is fixedly connected to the side wall of the top block (604) away from the lower template (4). A locking cylinder (605) is fixedly connected to the side wall of the lower template (4). The piston rod of the locking cylinder (605) is fixedly connected to the movable frame (606).

2. The automatically locking multi-cavity injection mold according to claim 1, characterized in that: The limiting groove (601) is arranged in the shape of "I" and the limiting block (602) is arranged in the shape of "U". Each limiting block (602) is connected to the inner bottom of the limiting groove (601) on the side facing the limiting groove (601) with a first spring (603).

3. The automatically locking multi-cavity injection mold according to claim 1, characterized in that: The upper seat plate (1) has a liquid inlet (5) at the top center, and the upper seat plate (1) has an injection chamber (12) inside, with a number of injection pipes (13) connected to the bottom of the injection chamber (12).

4. A multi-cavity injection mold with automatic locking according to claim 3, characterized in that: The bottom of the upper template (3) is fixedly connected to the upper mold core (14). Several sets of upper cavities (17) are symmetrically opened on the inner side of the upper mold core (14). The top of the lower template (4) is fixedly connected to the lower mold core (15). Several sets of lower cavities (18) are symmetrically opened on the inner side of the lower mold core (15). The lower mold core (15) is located directly below the upper mold core (14). The positions and shapes of several upper cavities (17) and lower cavities (18) are matched, and the upper cavities (17) and lower cavities (18) are connected to each other.

5. A multi-cavity injection mold with automatic locking according to claim 4, characterized in that: A branch channel (19) is provided between each group of lower cavities (18), and the bottom end of the injection pipe (13) is connected to the middle pipeline of the adjacent branch channel (19).

6. A multi-cavity injection mold with automatic locking according to claim 4, characterized in that: Cooling pipes (20) are arranged around the inner sides of the upper mold core (14) and the lower mold core (15). Several guide rods (10) are vertically fixed between the bottom of the lower mold plate (4) and the lower base plate (2). A top plate (7) is horizontally slidably connected between the several guide rods (10). A second spring (11) is connected between the top plate (7) and the bottom of the lower mold plate (4). Several sets of push rods (16) are vertically fixed to the top plate (7). The top of the push rods (16) extends through the lower mold plate (4) to the bottom of the lower mold core (15).

Images