Automatic locking structure of three-layer mold

Abstract

The utility model relates to the technical field of molds, and discloses an automatic locking structure of a three-layer mold, which comprises an upper fixing plate, a runner plate and a female mold plate, the bottom of the female mold plate is fixedly connected with a base, a locking component is mounted outside the base, a demolding component is mounted in the middle of the female mold plate, and the upper fixing plate is fixedly connected with the runner plate. The top of the upper fixing plate is fixedly connected with a plastic inlet; the locking assembly comprises a shell, the shell is fixedly connected to the outer side of the base, a movable block is rotationally connected to the middle of the shell, a connecting rod is fixedly connected to the outer portion of the runner plate, and an empty groove is formed in the connecting rod. According to the utility model, the movable block is clamped and matched with the empty slot, so that automatic locking during mold closing is realized, the positioning columns of the upper fixed plate are inserted into the positioning holes of the runner plate and the female mold plate, accurate alignment during mold closing of the three-layer mold plate is guaranteed, molding deviation is reduced, mold plate dislocation during injection molding is avoided, and the dimensional accuracy and surface quality of a product are improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an automatic locking structure for a three-layer mold. Background Technology

[0002] Molds are various shapes and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. A three-plate mold is a type of mold requiring two-stage mold opening and is suitable for processing some relatively complex workpieces. Currently, achieving two-stage mold opening for three-plate molds is mostly achieved by modifying the mold opening and closing mechanism on the injection molding machine.

[0003] Traditional three-layer molds often use manual bolt fixing for locking. This method is not only cumbersome and prolongs the production cycle, but also makes it difficult to uniformly tighten the bolts, resulting in uneven locking forces in different parts and affecting the overall sealing of the mold. In addition, the traditional structure lacks precise positioning design, and the mold plates of each layer cannot be guaranteed to be precisely coaxial during mold closing, resulting in large deviations in the dimensional properties of the molded products. Therefore, an automatic locking structure for three-layer molds is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an automatic locking structure for a three-layer mold, aiming to improve the problems of cumbersome manual bolt fixing operation and large deviations in product molding dimensions in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic locking structure for a three-layer mold includes an upper fixed plate, a runner plate, and a mother mold plate. A base is fixedly connected to the bottom of the mother mold plate, and a locking component is installed on the outside of the base. A demolding component is installed in the middle of the mother mold plate, and a molding inlet is fixedly connected to the top of the upper fixed plate.

[0007] The locking assembly includes a housing, which is fixedly connected to the outside of the base. A movable block is rotatably connected to the middle of the housing. A connecting rod is fixedly connected to the outside of the flow channel plate. A slot is opened inside the connecting rod. The connecting rod is slidably connected to the middle of the housing. The end of the movable block is engaged with the slot.

[0008] As a further description of the above technical solution:

[0009] The locking assembly further includes a fixing block that contacts the top of the movable block, and a pressing block is fixedly connected to the top of the fixing block, the pressing block being slidably connected to the middle of the housing;

[0010] As a further description of the above technical solution:

[0011] The demolding assembly includes an electric push rod, which is fixedly connected to the middle of the base. The output end of the electric push rod is fixedly connected to a mounting plate. A ejector pin is fixedly connected to the top of the mounting plate. A spring is sleeved on the outside of the ejector pin. The spring is slidably connected to the middle of the mother mold plate. A top plate is fixedly connected to the top of the spring.

[0012] As a further description of the above technical solution:

[0013] A fixing rod is provided at the bottom of the connecting rod, and a spring three is fixedly connected to the bottom of the fixing rod. A spring two is fixedly connected inside the housing, and the top of the spring two is in contact with the bottom of the movable block.

[0014] As a further description of the above technical solution:

[0015] The flow channel plate has grooves on both sides, and the mother template has protrusions fixedly connected to both sides, the protrusions engaging with the grooves.

[0016] As a further description of the above technical solution:

[0017] A punch is fixedly connected to the top of the mother template, and the top plate is slidably connected to the outside of the punch;

[0018] As a further description of the above technical solution:

[0019] The upper fixed plate is rotatably connected to a mold locking buckle, and the flow channel plate is fixedly connected to a locking post. The mold locking buckle engages with the locking post.

[0020] As a further description of the above technical solution:

[0021] A positioning post is fixedly connected to the bottom of the upper fixing plate, and a positioning hole is opened in the middle of the flow channel plate and the mother template. The positioning post is slidably connected to the middle of the positioning hole.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the automatic locking of the mold is achieved by the snap-fit ​​between the movable block and the empty slot. The positioning pin of the upper fixed plate is inserted into the positioning hole of the runner plate and the mother template to ensure accurate alignment of the three-layer template when the mold is closed, reduce molding deviation, avoid template misalignment during injection molding, and improve the dimensional accuracy and surface quality of the product.

[0024] 2. In this utility model, the electric push rod pushes the mounting plate to drive the ejector pin and the top plate to demold the product, and the demolding force is evenly distributed on the bottom of the product, avoiding deformation or damage caused by local stress concentration, realizing precise and controllable demolding action, and shortening the production cycle. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an automatic locking structure for a three-layer mold proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the locking buckle of an automatic locking structure for a three-layer mold proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the spring in the automatic locking structure of a three-layer mold proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the punch of an automatic locking structure for a three-layer mold proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the movable block of an automatic locking structure for a three-layer mold proposed in this utility model.

[0030] Legend:

[0031] 1. Upper fixing plate; 2. Runner plate; 3. Mother mold plate; 4. Shell; 5. Mounting plate; 6. Positioning hole; 7. Inlet; 8. Mold locking buckle; 9. Locking post; 10. Connecting rod; 11. Base; 12. Groove; 13. Protrusion; 14. Spring 1; 15. Pressing block; 16. Electric push rod; 17. Punch; 18. Top plate; 19. Ejector pin; 20. Hollow slot; 21. Movable block; 22. Spring 2; 23. Fixing rod; 24. Spring 3; 25. Fixing block; 26. Positioning post. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5This utility model provides an embodiment of an automatic locking structure for a three-layer mold, comprising an upper fixed plate 1, a runner plate 2, and a mother mold 3. A base 11 is fixedly connected to the bottom of the mother mold 3, and a locking assembly is installed on the outside of the base 11. A demolding assembly is installed in the middle of the mother mold 3, and a molding inlet 7 is fixedly connected to the top of the upper fixed plate 1. The locking assembly includes a housing 4, which is fixedly connected to the outside of the base 11. A movable block 21 is rotatably connected to the middle of the housing 4. A connecting rod 10 is fixedly connected to the outside of the runner plate 2, and a slot 20 is provided inside the connecting rod 10. The connecting rod 10 is slidably connected to the middle of the housing 4, and the end of the movable block 21 engages with the slot 20. The locking assembly also includes a fixed block 25, which contacts the top of the movable block 21. A pressing block 15 is fixedly connected to the top of the fixed block 25 and slidably connected to the middle of the housing 4. A fixing rod 23 is provided at the bottom of the connecting rod 10, and a spring 24 is fixedly connected to the bottom of the fixing rod 23. A spring 22 is fixedly connected inside the housing 4. The top of the spring 22 contacts the bottom of the movable block 21. When the flow channel plate 2 moves down, the connecting rod 10 inserts into the housing 4, and the movable block 21 is engaged in the slot 20 of the connecting rod 10 under the action of the spring 22, locking the relative position of the flow channel plate 2 and the base 11, thereby locking the flow channel plate 2 and the mother mold plate 3. The setting of the spring 22 and the spring 34 provides stable elastic force support for the movement of the movable block 21, making the locking and unlocking process smoother and more reliable, reducing the damage to the mold caused by the impact and vibration between the components, and extending the service life of the mold. The runner plate 2 has grooves 12 on both sides, and the mother mold plate 3 has protrusions 13 fixedly connected to both sides. The protrusions 13 engage with the grooves 12. The runner plate 2 and the mother mold plate 3 are engaged by the grooves 12 and protrusions 13, which enhances lateral stability, prevents mold misalignment during injection molding, and improves the dimensional accuracy and surface quality of the product. The upper fixed plate 1 is externally rotatably connected to a mold locking buckle 8, and the runner plate 2 is externally fixedly connected to a locking post 9, which engages with the locking buckle 8. The bottom of the upper fixed plate 1 is fixedly connected to a positioning post 26. The middle of the runner plate 2 and the mother mold plate 3 has a positioning hole 6, and the positioning post 26 is slidably connected to the middle of the positioning hole 6. The positioning post 26 of the upper fixed plate is inserted into the positioning hole 6 of the runner plate 2 and the mother mold plate 3 to ensure accurate alignment when the three mold layers are closed and reduce molding deviation.

[0034] Reference Figures 1-4The demolding assembly includes an electric push rod 16, which is fixedly connected to the middle of the base 11. A mounting plate 5 is fixedly connected to the output end of the electric push rod 16. An ejector pin 19 is fixedly connected to the top of the mounting plate 5. A spring 14 is sleeved on the outside of the ejector pin 19 and slidably connected to the middle of the mother mold 3. A top plate 18 is fixedly connected to the top of the spring 14. A punch 17 is fixedly connected to the top of the mother mold 3, and the top plate 18 is slidably connected to the outside of the punch 17. After injection molding is completed, the electric push rod 16 extends and pushes the mounting plate 5 upward. The mounting plate 5 drives the ejector pin 19 to rise together. The top plate 18 at the top of the ejector pin 19 contacts the molded product and applies an upward force, thereby ejecting the product from the punch 17. After the product is ejected, the electric push rod 16 stops working and begins to retract. At this time, the spring 14 releases its stored elastic potential energy, causing the top plate 18 and the ejector pin 19 to move downward, returning them to their initial positions, preparing for the next injection molding. Driven by the electric push rod 16, the product can be ejected from the mold quickly and accurately, improving production efficiency and making it suitable for automated production processes.

[0035] Working principle: When the mother template 3 and the runner plate 2 move upward to the fixed plate 1, the positioning pin 26 is inserted into the positioning hole 6 of the runner plate 2 and the mother template 3 to ensure that the three templates are accurately aligned and the 1 and runner plate 2 are in contact. The locking buckle 8 rotates and engages with the locking pin 9 to realize the connection between the upper fixed plate 1 and the runner plate 2.

[0036] When the runner plate 2 moves downward, the connecting rod 10 inserts into the housing 4. The movable block 21, under the action of the spring 22, engages with the slot 20 of the connecting rod 10, locking the relative position of the runner plate 2 and the base 11, thus locking the runner plate 2 and the mother mold 3. To open the runner plate 2 and the mother mold 3, the pressing block 15 is pressed down, causing the fixing block 25 to press the movable block 21 downward, disengaging the front end of the movable block 21 from the slot 20. The grooves 12 on both sides of the runner plate 2 engage with the protrusions 13 of the mother mold 3, further ensuring lateral alignment of the mold and preventing misalignment during injection molding.

[0037] The electric push rod 16 extends to push the mounting plate 5 and the ejector pin 19 upward, so that the ejector pin 19 drives the top plate 18 to move upward and eject the product from the punch 17.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic locking structure for a three-layer mold, comprising an upper fixing plate (1), a flow channel plate (2), and a mother mold plate (3), characterized in that: A base (11) is fixedly connected to the bottom of the mother template (3), a locking component is installed on the outside of the base (11), a demolding component is installed in the middle of the mother template (3), and a plastic inlet (7) is fixedly connected to the top of the upper fixing plate (1). The locking assembly includes a housing (4), which is fixedly connected to the outside of the base (11). A movable block (21) is rotatably connected to the middle of the housing (4). A connecting rod (10) is fixedly connected to the outside of the flow channel plate (2). A slot (20) is provided inside the connecting rod (10). The connecting rod (10) is slidably connected to the middle of the housing (4). The end of the movable block (21) is engaged with the slot (20).

2. The automatic locking structure of a three-layer mold according to claim 1, characterized in that: The locking assembly also includes a fixing block (25), which contacts the top of the movable block (21). A pressing block (15) is fixedly connected to the top of the fixing block (25), and the pressing block (15) is slidably connected to the middle of the housing (4).

3. The automatic locking structure of a three-layer mold according to claim 1, characterized in that: The demolding assembly includes an electric push rod (16), which is fixedly connected to the middle of the base (11). The output end of the electric push rod (16) is fixedly connected to a mounting plate (5). The top of the mounting plate (5) is fixedly connected to an ejector pin (19). A spring (14) is sleeved on the outside of the ejector pin (19). The spring (14) is slidably connected to the middle of the mother template (3). The top of the spring (14) is fixedly connected to a top plate (18).

4. The automatic locking structure of a three-layer mold according to claim 1, characterized in that: The bottom of the connecting rod (10) is provided with a fixing rod (23), and the bottom of the fixing rod (23) is fixedly connected with a spring three (24). The inside of the housing (4) is fixedly connected with a spring two (22), and the top of the spring two (22) is in contact with the bottom of the movable block (21).

5. The automatic locking structure of a three-layer mold according to claim 1, characterized in that: The flow channel plate (2) has grooves (12) on both sides, and the mother template (3) has protrusions (13) fixedly connected to both sides, and the protrusions (13) are engaged with the grooves (12).

6. The automatic locking structure of a three-layer mold according to claim 3, characterized in that: The top of the mother template (3) is fixedly connected to a punch (17), and the top plate (18) is slidably connected to the outside of the punch (17).

7. The automatic locking structure of a three-layer mold according to claim 1, characterized in that: The upper fixing plate (1) is rotatably connected to a mold locking buckle (8), and the flow channel plate (2) is fixedly connected to a locking post (9). The mold locking buckle (8) is engaged with the locking post (9).

8. The automatic locking structure of a three-layer mold according to claim 1, characterized in that: The bottom of the upper fixing plate (1) is fixedly connected to a positioning post (26), and the middle of the flow channel plate (2) and the mother template (3) is provided with a positioning hole (6), and the positioning post (26) is slidably connected to the middle of the positioning hole (6).

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