Simple secondary ejection mechanism for injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold type simple secondary ejection mechanism which comprises a mold base bottom plate, one side of the mold base bottom plate is in threaded connection with a connecting column through a positioning bolt, and one side of the connecting column is provided with a mold base plate B; first springs are installed at the two ends of the side, close to the mold base bottom plate, of the mold base plate B correspondingly, and a secondary ejection mechanism is installed among the two first springs, the connecting columns and the mold base bottom plate and comprises a connecting assembly, an upper hook assembly, a lower hook assembly and a movable positioning assembly; the connecting assembly comprises a first needle plate which sleeves the outer part of the connecting column and is close to one end of the first spring, a second needle plate sleeves the outer part of the connecting column and is positioned on one side of the first needle plate, and a third needle plate sleeves the outer part of the connecting column and is positioned on one side of the second needle plate; according to the secondary ejection mechanism, secondary ejection is carried out on a formed product, and the problems that similar products are difficult to fall off and swell when ejected are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly relates to a simple secondary ejection mechanism for injection molds. Background Technique

[0002] Compared with metals, stones, and woods, plastic products have the advantages of low cost and strong plasticity, and are widely used in the national economy. The plastic industry occupies an extremely important position in the world today. Plastics are materials mainly composed of resins, with additives such as plasticizers, fillers, and lubricants as auxiliary components, and can be flow-formed during the processing process. Since the advent of plastics, due to their good physical and chemical properties, they have been deeply loved by people and are known as one of the greatest inventions of the 20th century. With the rapid development of the economy and society, plastics appear in all aspects of people's lives and work, and partially replace products such as metals and glasses and are applied to various industries. At present, due to many factors such as structure, category, and injection conditions in plastic molding, there are still different injection defects affecting product quality. To solve the problems that it is difficult to eject products by primary ejection and the product body wall thickness is too thin and bulges during ejection, such a special mechanism has been developed, which is simple to manufacture and has a low cost; it can effectively improve the production problems of difficult product removal and ejection deformation in the original production. Content of the Utility Model

[0003] The purpose of the utility model is to provide a simple secondary ejection mechanism for injection molds to solve the problems mentioned in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A simple secondary ejection mechanism for injection molds includes a mold base plate. One side of the mold base plate is threadedly connected with a connecting column through a positioning bolt. One side of the connecting column is provided with a mold B plate. Both ends of the side of the mold B plate close to the mold base plate are provided with first springs. A secondary ejection mechanism is installed between the two first springs, the connecting column, and the mold base plate.

[0006] As a preferred scheme of the utility model, the secondary ejection mechanism includes a connection component, an upper hook component, a lower hook component, and a movable positioning component. The connection component includes a first needle plate sleeved on the outside of the connecting column near one end of the first spring. A second needle plate is sleeved on the outside of the connecting column on one side of the first needle plate. A third needle plate is sleeved on the outside of the connecting column on one side of the second needle plate. One side of the first needle plate is connected with one end of the first spring.

[0007] As a preferred scheme of the utility model, one side of the third needle plate is provided with a buckle fixing plate. One side of the buckle fixing plate is provided with a movable groove, and the other end of one side of the buckle fixing plate is provided with a hook pulling groove. The inside of the movable groove and the hook pulling groove are communicated.

[0008] As a preferred solution of the present utility model, both ends of the upper hook assembly installed on the second needle plate are provided with upper pull hook plates, two groups of upper pull hook blocks are installed at one end of the upper pull hook plate, and a first groove is formed on one side of the upper pull hook block.

[0009] As a preferred solution of the present utility model, the lower hook assembly includes lower pull hook plates installed at both ends of the mold base bottom plate, a lower pull hook block is installed at one end of the lower pull hook plate, the position of the lower pull hook block is arranged staggeredly with the position of the upper pull hook block, and both the lower pull hook block and the upper pull hook block are slidably connected to the hook slot.

[0010] As a preferred solution of the present utility model, the movable positioning assembly includes a plurality of snap springs arranged and installed on one side of the second needle plate, a movable snap is installed at the other end of the snap spring, and the movable snap is slidably connected to the movable slot.

[0011] As a preferred solution of the present utility model, a first guiding surface is formed on one side of the movable snap and one side of the lower pull hook block, the two first guiding surfaces are mutually attached, and a second guiding surface is formed on the other side of the lower pull hook block.

[0012] As a preferred solution of the present utility model, the upper pull hook plate and the lower pull hook plate are respectively connected to the second needle plate and the mold base bottom plate through a plurality of fixing screws and fixing pins.

[0013] As a preferred solution of the present utility model, the movable snap, the upper pull hook plate, the upper pull hook block, the lower pull hook plate, the lower pull hook block and the snap fixing plate are all made of NAK80 material.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, by pushing the second needle plate by an injection molding machine, driving the upper hook assembly and the movable snap on the second needle plate to move, making it contact with the first guiding surface on the lower groove assembly, and then jacking up the mold B plate to perform secondary ejection on the molded product, effectively solving the problems that similar products are not easy to eject and fall off and the products bulge.

[0016] 2. In the present utility model, the ejection mechanism simplifies the assembly space, reduces the number of templates, and is convenient for processing. The assembly gap can be adjusted arbitrarily according to actual requirements, further improving the practicability and flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 It is a three-dimensional structure schematic diagram of the upper hook assembly and the lower hook assembly of the present utility model;

[0019] Figure 3 This is a schematic structural diagram of the upper hook assembly of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the lower hook assembly of the present utility model.

[0021] In the figure: 1. Mold base bottom plate; 2. Positioning bolt; 3. Connecting column; 4. Mold B plate; 5. First spring; 6. First guiding surface; 7. Fixing screw; 8. Fixing pin; 9. First needle plate; 10. Second needle plate; 11. Third needle plate; 12. Snap fixing plate; 13. Upper hook plate; 14. Upper hook block; 15. Lower hook plate; 16. Lower hook block; 17. Snap spring; 18. Movable snap. Specific embodiments

[0022] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0023] Please refer to Figures 1-4 The present utility model provides a technical solution:

[0024] A simple secondary ejection mechanism for an injection mold includes a mold base bottom plate 1. One side of the mold base bottom plate 1 is threadedly connected with a connecting column 3 through a positioning bolt 2. One side of the connecting column 3 is provided with a mold B plate 4. Both ends of the side of the mold B plate 4 close to the mold base bottom plate 1 are provided with first springs 5. A secondary ejection mechanism is installed between the two first springs 5, the connecting column 3 and the mold base bottom plate 1. When the device is in use, the injection molding machine can push the second needle plate 10 to drive the movable snap 18 on the upper hook assembly and the second needle plate 10 to move, so that it contacts the first guiding surface 6 on the lower groove assembly, and then the mold B plate 4 is lifted to perform secondary ejection on the molded product, effectively solving the problems that similar products are difficult to eject and fall off and the products are bulged.

[0025] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, the secondary ejection mechanism includes a connection component, an upper hook component, a lower hook component, and a movable positioning component. The connection component includes a first needle plate 9 sleeved on the outside of the connection column 3 near one end of the first spring 5. A second needle plate 10 is sleeved on the outside of the connection column 3 on one side of the first needle plate 9, and a third needle plate 11 is sleeved on the outside of the connection column 3 on one side of the second needle plate 10. One side of the first needle plate 9 is connected to one end of the first spring 5. The lower hook component includes lower hook plates 15 installed at both ends of the mold base bottom plate 1. One end of the lower hook plate 15 is installed with a lower hook block 16. The position of the lower hook block 16 is staggered with the position of the upper hook block 14. Both the lower hook block 16 and the upper hook block 14 are slidably connected to the hook pulling groove. The movable positioning component includes a plurality of groups of snap springs 17 arranged and installed on one side of the second needle plate 10. The other end of the snap spring 17 is installed with a movable snap 18. The movable snap 18 is slidably connected to the movable groove. First guiding surfaces 6 are provided on one side of the movable snap 18 and one side of the lower hook block 16. The two first guiding surfaces 6 are in mutual contact. A second guiding surface is provided on the other side of the lower hook block 16. First, after the product is initially ejected, if it is still not completely ejected, the injection molding machine can be used to push the second needle plate 10 to move. The movable snap 18 moves, and its first guiding surface 6 then contacts the first guiding surface 6 on the lower hook block 16. The snap spring 17 is squeezed and retracted, and the movable snap 18 also moves to one side of the second guiding surface accordingly. The first spring 5 also secondarily ejects the un-ejected product on the mold base B plate 4, completely ejecting the product.

[0026] In this embodiment, as Figure 1 、 Figure 2 and Figure 3 shown, the upper hook plates 13 and the lower hook plates 15 are respectively connected to the second needle plate 10 and the mold base bottom plate 1 through a plurality of sets of fixing screws 7 and fixing pins 8. The movable snap 18, the upper hook plates 13, the upper hook blocks 14, the lower hook plates 15, the lower hook blocks 16, and the snap fixing plate 12 are all made of NAK80 material. A snap fixing plate 12 is installed on one side of the third needle plate 11. A movable groove is provided on one side of the snap fixing plate 12, and a hook pulling groove is provided at the other end on one side of the snap fixing plate 12. The inner sides of the movable groove and the hook pulling groove are connected. The upper hook component includes upper hook plates 13 installed at both ends of the second needle plate 10. Two upper hook blocks 14 are installed at one end of the upper hook plate 13. A first groove is provided on one side of the upper hook block 14. Then, after the ejection is completed, let the injection molding machine reset. At this time, the first spring 5 is no longer compressed and will also rebound accordingly, pushing the first needle plate 9, the second needle plate 10, and the third needle plate 11 back to their original positions. The movable snap 18 and the upper hook plate 13 move back to their original positions accordingly. The movable snap 18 squeezes the snap spring 17 to retract again until it moves to the first guiding surface 6, completing the repositioning of the movable snap 18 for reuse.

[0027] The implementation principle of a simple secondary ejection mechanism for an injection mold of the present application embodiment is as follows: after the product is initially ejected, if it is still not completely ejected, the injection molding machine can be used to push the second needle plate 10 to move, the active buckle 18 moves, and its first guide surface 6 contacts the first guide surface 6 on the lower hook block 16, the buckle spring 17 is squeezed and retracted, and the active buckle 18 also moves to the side of the second guide surface, and the first spring 5 also performs secondary ejection on the unreleased product on the mold base B plate 4 to completely eject the product. After the ejection is completed, the injection molding machine is reset. At this time, the first spring 5 is no longer compressed and will rebound accordingly, pushing the first needle plate 9, the second needle plate 10 and the third needle plate 11 back and resetting, the active buckle 18 and the upper hook plate 13 move and reset accordingly, and the active buckle 18 compresses and retracts the buckle spring 17 again until it moves to the first guide surface 6, completing the resetting of the active buckle 18 for reuse.

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

Claims

1. A simple secondary ejection mechanism for an injection mold, comprising a mold base bottom plate (1), characterized in that: One side of the mold base bottom plate (1) is threadedly connected to a connecting column (3) via a positioning bolt (2); a mold base B plate (4) is installed on one side of the connecting column (3); first springs (5) are installed at both ends of the mold base B plate (4) close to the mold base bottom plate (1); and a secondary ejection mechanism is installed between two groups of the first springs (5) and the connecting column (3) and the mold base bottom plate (1).

2. The simplified secondary ejection mechanism for injection molds according to claim 1, characterized in that: The secondary ejection mechanism comprises a connecting assembly, an upper hook assembly, a lower hook assembly and a movable positioning assembly, wherein the connecting assembly comprises a first needle plate (9) sleeved on the outside of the connecting column (3) near one end of the first spring (5), a second needle plate (10) sleeved on one side of the first needle plate (9) on the outside of the connecting column (3), a third needle plate (11) sleeved on one side of the second needle plate (10) on the outside of the connecting column (3), and one side of the first needle plate (9) is connected to one end of the first spring (5).

3. The simplified secondary ejection mechanism for injection mold according to claim 2, characterized in that: A buckle fixing plate (12) is installed on one side of the third needle plate (11), a movable groove is provided on one side of the buckle fixing plate (12), a hook groove is provided on the other end of one side of the buckle fixing plate (12), and the movable groove is connected to the inner side of the hook groove.

4. The simplified secondary ejection mechanism for injection molds according to claim 3, characterized in that: The upper hook assembly comprises upper hook plates (13) installed at both ends of the second needle plate (10), two groups of upper hook blocks (14) installed at one end of the upper hook plate (13), and a first groove is formed on one side of the upper hook block (14).

5. The simplified secondary ejection mechanism for injection molds according to claim 4, characterized in that: The lower hook assembly comprises a lower hook plate (15) mounted on both ends of the mold base bottom plate (1), a lower hook block (16) being mounted on one end of the lower hook plate (15), the position of the lower hook block (16) being staggered with the position of the upper hook block (14), and the lower hook block (16) and the upper hook block (14) being slidably connected to the hook groove.

6. The simplified secondary ejection mechanism for injection molds according to claim 5, characterized in that: The movable positioning assembly comprises a plurality of groups of snap springs (17) arranged and mounted on one side of the second needle plate (10); a movable snap (18) is mounted on the other end of the snap spring (17); and the movable snap (18) is slidably connected to the movable groove.

7. The simplified secondary ejection mechanism for injection molds according to claim 6, characterized in that: One side of the movable buckle (18) and one side of the lower hook block (16) are both provided with a first guide surface (6), the two groups of the first guide surfaces (6) are in contact with each other, and the other side of the lower hook block (16) is provided with a second guide surface.

8. The simplified secondary ejection mechanism for injection molds according to claim 7, characterized in that: The upper hook plate (13) and the lower hook plate (15) are respectively connected to the second needle plate (10) and the mold base bottom plate (1) via a plurality of sets of fixing screws (7) and fixing pins (8).

9. The simplified secondary ejection mechanism for injection molds according to claim 6, characterized in that: The movable buckle (18), the upper hook plate (13), the upper hook block (14), the lower hook plate (15), the lower hook block (16) and the buckle fixing plate (12) are all made of NAK80 material.

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