Separated ejection mechanism and injection mold

Abstract

The utility model discloses a separated ejection mechanism and an injection mold. The separated ejection mechanism comprises an ejector plate, a plurality of ejector supports, a supporting plate, a plurality of product ejector pins, a plurality of stub bar ejector pins and an ejector rod. The ejector plate comprises a top surface, a bottom surface and a plurality of stepped holes, and stepped surfaces are arranged in the stepped holes. The ejector pin support is suspended in the stepped hole, the ejector pin support comprises a supporting rod and a supporting block supported by the supporting rod, and the supporting block comprises a supporting surface which is arranged at an interval with the stepped surface and is matched with the stepped surface when the ejector pin plate moves. The supporting plate is stacked on one side of the bottom face of the ejector plate. The product ejector pin abuts against the supporting block. The stub bar ejector pin is propped against the ejector pin plate; the ejector rod penetrates through the supporting plate and is used for driving the ejector plate to move in a segmented mode. The ejection head and the product are separated, the product is prevented from being overturned, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a separate ejection mechanism and an injection mold. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are high production speed, high efficiency, high automation, a variety of flower patterns and colors, precise dimensions, and easy product replacement. Injection molding is suitable for mass production, complex shapes and other molding processing fields. At a certain temperature, the plastic material is transformed into a molten state and injected into the cavity of the injection mold under high pressure. After the plastic material cools and solidifies, it is ejected through the ejection mechanism in the injection mold to realize product demolding. Generally, the sprue and the product are ejected synchronously, which easily causes the product to be pulled due to its connection with the sprue, resulting in the product being toppled over, thus affecting production efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a separate ejection mechanism and an injection mold.

[0004] To achieve the above-mentioned utility model purpose, the utility model adopts the following technical scheme: A separate ejection mechanism, which includes:

[0005] A thimble plate, which includes a top surface, a bottom surface and a plurality of stepped holes. The top surface and the bottom surface are oppositely arranged. The stepped holes penetrate from the top surface to the bottom surface, and a stepped surface is arranged in the stepped holes;

[0006] A plurality of thimble supports, the thimble supports are suspended in the stepped holes. The thimble support includes a support rod and a support block supported by the support rod. The support block includes a support surface spaced from the stepped surface and cooperating when the thimble plate moves;

[0007] A support plate, which is stacked on one side of the bottom surface of the thimble plate. The support plate includes a support surface for supporting the thimble support;

[0008] A plurality of product thimbles, the product thimbles abut against the support block;

[0009] A plurality of sprue thimbles, the sprue thimbles abut against the thimble plate;

[0010] A ejector rod, which passes through the support plate. The ejector rod is used to drive the thimble plate to move in sections.

[0011] As a further improved technical scheme of the utility model, the stepped hole includes a large hole recessed from the top surface and a small hole penetrating from the bottom of the large hole to the bottom surface. The bottom of the large hole forms the stepped surface.

[0012] As a further improved technical solution of the present utility model, the support rod passes through the small hole, the supporting block displaces in the large hole, and after the supporting surface fits against the step surface, the step surface supports the ejector pin support so that the ejector pin bracket is arranged in the step hole.

[0013] As a further improved technical solution of the present utility model, the ejector rod drives the ejector pin plate to move in the first and second sections; in the initial position, the distance between the step surface and the supporting surface is 6 mm; after the ejector pin plate moves in the first section, the step surface and the supporting surface come into contact; after the ejector pin plate moves in the second section, the support rod is 3 mm away from the supporting surface.

[0014] As a further improved technical solution of the present utility model, the separate ejection mechanism includes 6 - 10 sets of ejector pin groups, and each ejector pin group includes two product ejector pins and two blanking ejector pins located between the two product ejector pins.

[0015] As a further improved technical solution of the present utility model, the separate ejection mechanism further includes a fixed column fixed to the ejector pin plate and a return spring sleeved on the fixed column.

[0016] The present utility model also discloses an injection mold, which includes a bottom plate, a mold base located on the bottom plate, a lower mold installed on the mold base, an upper mold cooperating with the lower mold, and the separate ejection mechanism as described above, and a mold cavity is formed between the lower mold and the upper mold.

[0017] As a further improved technical solution of the present utility model, the support plate is fixed to the bottom plate, and the ejector rod passes through the bottom plate.

[0018] The beneficial effect of the present utility model is that through the step hole and the ejector pin support, the ejector pin plate moves upward in sections to separately eject the blanking and the product, preventing the product from being toppled over and improving production efficiency. Description of the Drawings

[0019] Figure 1 is a partial structural schematic diagram of the injection mold of the present utility model including a separate ejection mechanism, where the separate ejection mechanism is in the initial state;

[0020] Figure 2 is Figure 1 an enlarged schematic diagram of frame A in

[0021] Figure 3 is Figure 1 an enlarged schematic diagram of frame B in

[0022] Figure 4 is a partial structural schematic diagram of the injection mold of the present utility model including a separate ejection mechanism, where the separate ejection mechanism is in the blanking ejection state;

[0023] Figure 5 is Figure 4 An enlarged schematic view of the middle frame C;

[0024] Figure 6 is Figure 4 An enlarged schematic view of the middle frame D;

[0025] Figure 7 is a partial structural schematic view of the injection mold of the present utility model including a separate ejection mechanism, wherein the separate ejection mechanism is in the product ejection state;

[0026] Figure 8 is Figure 7 An enlarged schematic view of the middle frame E;

[0027] Figure 9 is Figure 7 An enlarged schematic view of the middle frame F. Specific embodiments

[0028] The following will describe the present utility model in detail in conjunction with the embodiments shown in the drawings. Please refer to the illustrations, which are the preferred embodiments of the present utility model. It should be noted, however, that these embodiments are not limitations on the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0029] Please refer Figures 1 to 9 , the present utility model discloses an injection mold 100, which includes a bottom plate 1, a mold base 2 located on the bottom plate 1, a lower mold 3 installed on the mold base 2, an upper mold (not shown) cooperating with the lower mold, and a separate ejection mechanism 200. A mold cavity is formed between the lower mold 3 and the upper mold.

[0030] Please continue to refer Figures 1 to 9 , the present utility model discloses a separate ejection mechanism 200 for separately ejecting the sprue S and the product W. The separate ejection mechanism 200 includes an ejector plate 4, a plurality of ejector pin supports 5, a support plate 6, a plurality of product ejector pins 71, a plurality of sprue ejector pins 72, a push rod 8, a fixing column 91, and a return spring 92.

[0031] The ejector plate 4 includes a top surface 41, a bottom surface 42, and a plurality of stepped holes 43. The top surface 41 and the bottom surface 42 are oppositely arranged. The stepped holes 43 penetrate from the top surface 41 to the bottom surface 42, and a stepped surface 44 is provided in the stepped holes 43. The stepped holes 43 include a large hole 431 recessed from the top surface 41 and a small hole 432 penetrating from the bottom of the large hole 431 to the bottom surface 42. The bottom of the large hole 431 forms the stepped surface 44.

[0032] The ejector pin holders 5 and the stepped holes 43 are arranged in one-to-one correspondence, and the ejector pin holders 5 are suspended in the stepped holes 43. The ejector pin holder 5 includes a support rod 51 and a support block 52 supported by the support rod 51. The support block 52 includes a support surface 521 that is spaced from the stepped surface 44 and cooperates when the ejector pin plate 4 moves. The support rod 51 is a thin cylindrical rod that penetrates through the small hole 432 and matches the aperture of the small hole 432. The support block 52 is a cylindrical block, and its diameter is larger than the diameters of the support rod 51 and the small hole 432. The diameter of the support block 52 matches the aperture of the large hole 431. The support rod 51 penetrates through the small hole 432, and the support block 52 displaces (relatively moves up and down) in the large hole 431. After the support surface 521 fits against the stepped surface 44, the stepped surface 44 supports the ejector pin holder 5 so that the ejector pin holder 5 is mounted in the stepped hole 43.

[0033] The support plate 6 is stacked on one side of the bottom surface 42 of the ejector pin plate 4, and the ejector pin plate 4 is located above the support plate 6. The support plate 6 includes a support surface 61 for supporting the ejector pin holder 5. In the initial position, the support surface 61 supports the ejector pin holder 5.

[0034] The product ejector pin 71 abuts against the support block 52. The sprue ejector pin 72 abuts against the top surface 41 of the ejector pin plate 4. In this embodiment, the separate ejection mechanism 200 includes 8 sets of ejector pin groups. Each ejector pin group includes two product ejector pins 71 and two sprue ejector pins 72 located between the two product ejector pins. In other embodiments, the separate ejection mechanism may include 6 - 10 sets of ejector pin groups, and each ejector pin group includes 1 - 2 product ejector pins and 1 - 2 sprue ejector pins. The ejector rod 8 passes through the support plate 61, and the ejector rod 8 is used to drive the ejector pin plate 4 to move in segments. The support plate 6 is fixedly arranged, and the ejector rod 8 is driven by a machine table (not shown) to pass through the support plate 6 to drive the ejector pin plate 4 to move upward.

[0035] In this embodiment, the ejector rod 8 drives the ejector pin plate 4 to move in the first and second segments; in the initial position, the distance L1 between the stepped surface 44 and the support surface 521 is 6 mm; after the ejector pin plate 4 moves in the first segment, the stepped surface 44 and the support surface 521 come into contact; after the ejector pin plate 4 moves in the second segment, the distance L2 between the support rod 51 and the support surface 61 is 3 mm. Thus, the sprue S and the product W can be separately ejected, thereby preventing the product W from being toppled over and improving production efficiency. In other embodiments, the distance between the stepped surface 44 and the support surface 521 is 6 - 10 mm, and the distance between the support rod 51 and the support surface 3 - 7 mm after movement.

[0036] The separate ejection mechanism 200 further includes a fixed column 91 fixed to the ejector pin plate 4 and a return spring 92 sleeved on the fixed column 91. After the sprue S and the product W are separately ejected, the ejector pin plate 4 can be reset by the return spring 92 to return to the initial position.

[0037] Please continue to refer Figures 1 to 9 In the injection mold 100, the support plate 6 is fixed to the bottom plate 1, and the ejector rod 8 passes through the bottom plate 1.

[0038] Please refer to Figures 1 to 9 to describe the process of the separate ejection mechanism 200 ejecting the sprue S and the product W separately.

[0039] First, please refer to Figures 1 to 3 which shows the state before the ejection of the sprue S and the product W after the mold opening of the injection mold 100 is completed, and this is the initial state. The ejector pin 8, the ejector plate 4, the ejector pin support 5, the product ejector pin 71, the sprue ejector pin 72, the fixing post 91, and the return spring 92 are all in the initial state. Both the sprue S and the product W are located in the mold cavity and have not been ejected.

[0040] Second, please refer to Figures 4 to 6 which shows the state of the sprue S being ejected. The machine drives the ejector pin 8, and the ejector pin 8 pushes the ejector plate 4 upward to move the first stage. Specifically, the ejector plate 4 moves upward by 6 mm, and the sprue ejector pin 72 moves upward by 6 mm to eject the sprue S. After the ejector plate 4 moves the first stage, the step surface 44 does not contact the support surface 521 or just abuts against the support surface 521 but does not apply force to the support surface 521. Therefore, the ejector pin support 5 does not move and remains in the initial position, the product ejector pin 71 does not move upward either, the sprue S is ejected, while the product W is not ejected. The return spring 92 is compressed.

[0041] Then, please refer to Figures 7 to 9 which shows the state of the product W being ejected. After the sprue S is ejected, the ejector plate 4 moves the second stage. Specifically, the ejector plate 4 continues to move upward by 3 mm, and the step surface 44 supports the support surface 521 to drive the ejector pin support 5 to move upward by 3 mm, so that the product ejector pin 71 moves upward by 3 mm and ejects the product W. After the ejector pin support 5 moves upward, it disengages from the support surface 61. The return spring 92 is further compressed.

[0042] Finally, after the sprue S and the product W are separately ejected, the machine removes the driving force of the ejector pin 8, and the return spring 92 elastically returns to reset the ejector plate 4. After the ejector pin support 5 loses the support of the ejector plate 4, it moves downward to the support plate 6. The ejector plate 4, the ejector pin support 5, the product ejector pin 71, and the sprue ejector pin 72 return to the initial position to facilitate the next injection molding.

[0043] The present utility model discloses an injection mold 100 including a separate ejection mechanism 200. After injection molding, through the stepped hole 43 of the separate ejection mechanism and the ejector pin support 5, the ejector plate 5 moves upward in stages, and can separately eject the sprue S and the product W, preventing the product W from being toppled over, improving production efficiency, reducing defective products, improving the product yield, and the separate ejection mechanism has a simple structure and stable performance.

[0044] It should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative manner of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0045] The series of detailed descriptions listed above are merely specific descriptions of the feasible embodiments of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent embodiments or modifications made without departing from the technical spirit of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A separate ejection mechanism, characterized in that: It includes: An ejector plate, comprising a top surface, a bottom surface and a plurality of step holes, wherein the top surface and the bottom surface are arranged opposite to each other, the step holes penetrate from the top surface to the bottom surface, and a step surface is arranged in the step holes; A plurality of ejector supports, wherein the ejector supports are suspended in the step hole, the ejector supports include a support rod and a support block supported by the support rod, and the support block includes a support surface spaced apart from the step surface and matched when the ejector plate moves; A support plate, which is stacked on one side of the bottom surface of the ejector plate, and the support plate includes a support surface for supporting the ejector holder; A plurality of product ejectors, wherein the product ejectors abut against the support block; A plurality of material head ejectors, wherein the material head ejectors abut against the ejector plate; A push rod passes through the support plate, and the push rod is used to drive the ejector plate to move in sections.

2. The separate ejection mechanism according to claim 1, characterized in that: The step hole includes a large hole recessed from the top surface and a small hole penetrating from the bottom of the large hole to the bottom surface, and the bottom of the large hole forms the step surface.

3. The separate ejection mechanism according to claim 2, characterized in that: The support rod is passed through the small hole, and after the support block is displaced in the large hole and the support surface is attached to the step surface, the step surface supports the ejector support so that the ejector support is arranged in the step hole.

4. The separate ejection mechanism according to claim 1, characterized in that: The ejector rod drives the ejector plate to move the first section and the second section; at the initial position, the step surface and the supporting surface are 6 mm apart; after the ejector plate moves the first section, the step surface and the supporting surface are in contact; after the ejector plate moves the second section, the support rod is 3 mm apart from the supporting surface.

5. The separate ejection mechanism according to claim 1, characterized in that: The separate ejection mechanism includes 6-10 ejector pin groups, and the ejector pin groups include two product ejector pins and two material head ejector pins located between the two product ejector pins.

6. The separate ejection mechanism according to claim 1, characterized in that: The separate ejection mechanism further comprises a fixing column fixed to the ejector plate and a return spring sleeved on the fixing column.

7. An injection mold, characterized in that: It comprises a bottom plate, a mold frame located on the bottom plate, a lower mold installed on the mold frame, an upper mold matched with the lower mold, and a separate ejection mechanism as described in any one of claims 1 to 6, and a mold cavity is formed between the lower mold and the upper mold.

8. The injection mold according to claim 7, characterized in that: The support plate is fixed to the bottom plate, and the top rod passes through the bottom plate.

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