Ejection stroke extending device for injection mold

Abstract

The utility model discloses an ejection stroke extending device for an injection mold, which comprises a lower mold, a bottom plate slidably connected to the side inner wall of the lower mold, a connecting rod fixedly connected to the upper surface of the bottom plate, a first sleeve fixedly connected to one end, far away from the bottom plate, of the connecting rod, a second sleeve slidably connected to one side surface of the sleeve, and a third sleeve slidably connected to the side surface of the second sleeve. The lower surface of the third sleeve is fixedly connected with a fixing plate which is fixedly connected with the first sleeve through a thrust spring. The lower surface of the upper die is fixedly connected with a pressing rod, the side surface of the bottom plate is fixedly connected with a sliding plate, the upper surface of the sliding plate is rotationally connected with a threaded block, the inner side face of the threaded block is in threaded connection with a threaded rod, and one end of the threaded rod is fixedly connected with a pressing block. According to the parts, the distance between the pressing block and the pressing rod is adjusted through the screw rod, so that the moving distance between the bottom plate and the sleeve is reduced to adapt to the height required by production of different workpieces, the occupied space is reduced in the mode that the sleeves are embedded into one another, and the ejection stroke is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an extended ejection stroke device for injection molds. Background Technology

[0002] Existing extended ejection stroke devices for injection molds all use a hydraulic device at the bottom of the mold to move a sliding plate to eject the generated workpiece. Although the ejection stroke can be adjusted by the height of the sliding plate, the hydraulic device is expensive and difficult to repair after damage. For example, a device for extending the ejection stroke of an injection mold disclosed in Chinese Patent Application No. CN202122533075.4, although it has the function of adjusting the ejection stroke and solves the problem of existing injection molds lacking the function of adjusting the ejection stroke, may not be able to effectively eject the internal workpiece after the mold is formed, causing a certain degree of impact on the operation. However, the hydraulic device used uses a large amount of compressed air or liquid to transmit power, which leads to energy waste. In addition, the hydraulic device has high working pressure and complex structure, and will consume a lot of manpower and material resources after damage, thus limiting its use. Utility Model Content

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an extended ejection stroke device for injection molds. By rotating the threaded block to adjust the distance between the pressure block and the pressure rod, the moving distance between the base plate and the sleeve is reduced to adapt to the height required for producing different workpieces. By interlocking the sleeves, the space occupied is reduced and the ejection stroke is extended. At the same time, as the moving distance of the base plate changes, the extension distance of the sleeve also changes, making the ejection of the workpiece more convenient. Moreover, the entire process can be completed by only using the movement of the upper mold. The structure is simple and no other power equipment is required.

[0004] This utility model also provides an extended ejection stroke device for injection molds, comprising: a lower mold, a base plate slidably connected to the inner side wall of the lower mold, a connecting rod fixedly connected to the upper surface of the base plate, a sleeve one fixedly connected to the end of the connecting rod away from the base plate, a sleeve two slidably connected to the side surface of the sleeve one, a sleeve three slidably connected to the side surface of the sleeve two, a fixing plate fixedly connected to the lower surface of the sleeve three, and the fixing plate being fixedly connected to the sleeve one by a thrust spring;

[0005] The upper mold has an injection port fixedly connected to its upper surface and a pressure rod fixedly connected to its lower surface. A sliding plate is fixedly connected to the side surface of the base plate, and a threaded block is rotatably connected to the upper surface of the sliding plate. A screw is threadedly connected to the inner side of the threaded block, and a pressure block is fixedly connected to one end of the screw. Through these components, the distance between the pressure block and the pressure rod is adjusted using the screw, reducing the movement distance between the base plate and the sleeve. This accommodates the height requirements of producing different workpieces and reduces the space occupied by the interlocking of the sleeves, thus extending the ejection stroke.

[0006] According to the extended ejection stroke device for injection molds described in this utility model, a return spring is fixedly connected to the upper bottom wall of the lower mold, and the end of the return spring away from the lower mold is fixedly connected to the base plate. The return spring drives the base plate to return to its original position.

[0007] According to the extended ejection stroke device for injection molds described in this utility model, the upper surface of the base plate is in contact with the fixed plate during operation, and the side surface of the fixed plate is fixedly connected to the lower mold. The base plate restricts the movement range of the fixed plate.

[0008] According to the extended ejection stroke device for injection molds described in this utility model, a top plate is detachably connected to the upper surface of the sleeve, and the side surface of the top plate is slidably connected to the lower mold. This allows the sleeve to drive the top plate to eject the produced workpiece.

[0009] According to the extended ejection stroke device for injection molds described in this utility model, a sliding rod is fixedly connected to the lower surface of the upper mold, and the side surface of the sliding rod is slidably connected to the lower mold. This helps the upper mold to be positioned during movement, improving the injection molding effect.

[0010] According to the extended ejection stroke device for injection molds described in this utility model, the side surface of the pressure rod is slidably connected to the slide plate, and the end of the pressure rod away from the upper mold is in contact with the pressure block during operation. The upper mold drives the pressure rod, allowing the slide plate and the base plate to move downwards.

[0011] According to the extended ejection stroke device for injection molds described in this utility model, a limiting rod is fixedly connected to the upper surface of the pressure block, and the side surface of the limiting rod is slidably connected to the sliding plate. This ensures that the two ends of the pressure block remain balanced.

[0012] According to the extended ejection stroke device for injection molds described in this utility model, a limit spring is fixedly connected to the upper surface of the slide plate, and the end of the limit spring away from the slide plate is fixedly connected to a limit rod. This ensures that the pressure block remains balanced when the pressure rod presses against it.

[0013] Beneficial effects:

[0014] Compared with existing technologies, the method of adjusting the distance between the pressure block and the pressure rod by rotating the threaded block reduces the moving distance between the base plate and the sleeve, which can be used to adapt to the height required for producing different workpieces. The space occupied is reduced by making the sleeves interlock, and the ejection stroke is extended. At the same time, as the moving distance of the base plate changes, the extension distance of the sleeve also changes, making the ejection of the workpiece more convenient. Moreover, the entire process can be completed by only using the movement of the upper mold. The structure is simple and no other power equipment is required. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is an overall structural diagram of the extended ejection stroke device for injection molds according to this utility model;

[0017] Figure 2 This is a cross-sectional view of the extended ejection stroke device for injection molds according to this utility model;

[0018] Figure 3 This utility model relates to an extended ejection stroke device for injection molds. Figure 2 Partial structural diagram at point A in the middle;

[0019] Figure 4 This utility model provides a structural diagram of the sleeve with a base plate for an extended ejection stroke device for injection molds.

[0020] Legend:

[0021] 1. Lower mold; 2. Slide rod; 3. Upper mold; 4. Injection port; 5. Top plate; 6. Pressure rod; 7. Slide plate; 8. Screw; 9. Threaded block; 10. Limiting spring; 11. Limiting rod; 12. Return spring; 13. Pressure block; 14. Base plate; 15. Fixing plate; 16. Sleeve 1; 17. Sleeve 2; 18. Sleeve 3; 19. Connecting rod; 20. Thrust spring. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] Reference Figure 1-4The present invention relates to an extended ejection stroke device for injection molds, comprising: a lower mold 1, a base plate 14 slidably connected to the inner side wall of the lower mold 1, a connecting rod 19 fixedly connected to the upper surface of the base plate 14, a sleeve 16 fixedly connected to the end of the connecting rod 19 away from the base plate 14, a sleeve 2 17 slidably connected to the side surface of the sleeve 16, a sleeve 3 18 slidably connected to the side surface of the sleeve 2 17, a fixing plate 15 fixedly connected to the lower surface of the sleeve 3 18, and the fixing plate 15 being fixedly connected to the sleeve 16 via a thrust spring 20;

[0024] Specifically, when the upper mold 3 moves the pressure rod 6 downward and presses the slide plate 7, the base plate 14 moves the sleeve 16 downward through the connecting rod 19. By retracting the sleeve 16 into the sleeve 2 17 and the sleeve 2 17 into the sleeve 3 18, the space occupied by the sleeve is reduced, the range of the ejection stroke is increased, and the thrust spring 20 is compressed during contraction. After the workpiece is cooled and shaped, the upper mold 3 moves upward, and the thrust spring 20 will push the sleeve 16 out, so that the sleeve 16 can drive the sleeve 2 17 to push the workpiece out.

[0025] The upper mold 3 has an injection port 4 fixedly connected to its upper surface and a pressure rod 6 fixedly connected to its lower surface. The side surface of the pressure rod 6 is slidably connected to the slide plate 7. The end of the pressure rod 6 away from the upper mold 3 is in contact with the pressure block 13 during operation. The side surface of the base plate 14 is fixedly connected to the slide plate 7 and the upper surface of the slide plate 7 is rotatably connected to a threaded block 9. The inner side of the threaded block 9 is threadedly connected to a screw 8 and one end of the screw 8 is fixedly connected to the pressure block 13.

[0026] Specifically, before use, the threaded block 9 can be rotated according to the required height of the workpiece. The screw 8 drives the pressure block 13 to move down, extending the distance between the pressure rod 6 and the pressure block 13, reducing the movement distance of the base plate 14 when the pressure rod 6 presses the pressure block 13. This is used to adjust and adapt to the height of the workpiece. After the setting is completed, the upper mold 3 drives the pressure rod 6 to move down and makes the pressure rod 6 press the pressure block 13. The base plate 14 is moved by the slide plate 7. After the upper mold 3 and the lower mold 1 are in contact, the raw material is introduced from the injection port 4 into the space between the upper mold 3 and the lower mold 1 for cooling and shaping.

[0027] A return spring 12 is fixedly connected to the upper bottom wall of the lower mold 1. The end of the return spring 12 away from the lower mold 1 is fixedly connected to the base plate 14. The upper surface of the base plate 14 is in contact with the fixing plate 15 during operation. The side surface of the fixing plate 15 is fixedly connected to the lower mold 1.

[0028] Specifically, after the base plate 14 moves under the action of the pressure rod 6, it will compress the return spring 12. After the upper mold 3 is reset, the return spring 12 pushes the base plate 14 to reset. The fixing plate 15 restricts the movement range of the base plate 14 and the sleeve 16 by fixing the sleeve 18.

[0029] The upper surface of sleeve 16 is detachably connected to a top plate 5, and the side surface of the top plate 5 is slidably connected to the lower mold 1.

[0030] Specifically, it can be determined whether a top plate 5 needs to be installed on the sleeve 16 based on the shape of the workpiece. When the bottom of the workpiece is smooth, the top plate 5 can be moved by the sleeve 16 during ejection to eject the workpiece out of the lower mold 1.

[0031] A slide rod 2 is fixedly connected to the lower surface of the upper mold 3, and the side surface of the slide rod 2 is slidably connected to the lower mold 1.

[0032] Specifically, the upper mold 3 can move along the direction of the slide bar 2, so that the upper mold 3 fits with the lower mold 1, ensuring the quality of the final produced workpiece.

[0033] A limiting rod 11 is fixedly connected to the upper surface of the pressure block 13. The side surface of the limiting rod 11 is slidably connected to the slide plate 7. A limiting spring 10 is fixedly connected to the upper surface of the slide plate 7. The end of the limiting spring 10 away from the slide plate 7 is fixedly connected to the limiting rod 11.

[0034] Specifically, when the screw 8 drives the pressure block 13 to move, the pressure block 13 will pull the limit rod 11 to move, and the limit rod 11 will compress the limit spring 10. When the pressure rod 6 presses the pressure block 13, the limit spring 10 provides a reaction force to provide an upward force to the limit rod 11, so that when the pressure rod 6 presses the pressure block 13 in the end, the pressure block 13 can maintain balance.

[0035] Working principle: Before use, rotate the threaded block 9 according to the height of the workpiece to be produced, so that the screw 8 can drive the pressure block 13 to move downward, reducing the movement distance of the base plate 14. At the same time, the pressure block 13 will drive the limit rod 11 to compress the limit spring 10. The elastic force of the limit spring 10 can keep the pressure block 13 balanced when it is pressed by the pressure rod 6. After adjustment, place the upper mold 3. The upper mold 3 drives the pressure rod 6 to move downward along the slide rod 2. After the pressure rod 6 contacts the pressure block 13, it starts to drive the base plate 14 to move through the slide plate 7. The base plate 14 is then pulled by the connecting rod 19. The moving sleeve 16 compresses the thrust spring 20, and through the sleeve 16 retracting into the sleeve 27, and the sleeve 27 retracting into the sleeve 318, the top plate 5 moves, leaving the required height for the workpiece. When the upper mold 3 and the lower mold 1 are in contact, the raw material is injected into the space between the upper mold 3 and the lower mold 1 through the injection port 4, so that the raw material cools and forms the workpiece. Finally, the upper mold 3 is removed. Under the action of the return spring 12 and the thrust spring 20, the bottom plate 14 and the sleeve 16 are reset. At the same time, the sleeve 16 drives the top plate 5 to push out the processed workpiece.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An extended ejection stroke device for injection molds, characterized in that, include: The lower mold (1) has a bottom plate (14) slidably connected to its inner side wall. A connecting rod (19) is fixedly connected to the upper surface of the bottom plate (14). A sleeve (16) is fixedly connected to the end of the connecting rod (19) away from the bottom plate (14). A sleeve (17) is slidably connected to the side surface of the sleeve (16). A sleeve (18) is slidably connected to the side surface of the sleeve (17). A fixing plate (15) is fixedly connected to the lower surface of the sleeve (18). The fixing plate (15) is fixedly connected to the sleeve (16) by a thrust spring (20). The upper mold (3) has an injection port (4) fixedly connected to its upper surface, a pressure rod (6) fixedly connected to its lower surface, a sliding plate (7) fixedly connected to the side surface of the base plate (14), a threaded block (9) rotatably connected to the upper surface of the sliding plate (7), a screw (8) threadedly connected to the inner side of the threaded block (9), and a pressure block (13) fixedly connected to one end of the screw (8).

2. The extended ejection stroke device for injection molds according to claim 1, characterized in that, A reset spring (12) is fixedly connected to the upper bottom wall of the lower mold (1), and the end of the reset spring (12) away from the lower mold (1) is fixedly connected to the bottom plate (14).

3. The extended ejection stroke device for injection molds according to claim 1, characterized in that, The upper surface of the base plate (14) is in contact with the fixing plate (15) during operation, and the side surface of the fixing plate (15) is fixedly connected to the lower mold (1).

4. The extended ejection stroke device for injection molds according to claim 1, characterized in that, The upper surface of the sleeve (16) is detachably connected to a top plate (5), and the side surface of the top plate (5) is slidably connected to the lower mold (1).

5. The extended ejection stroke device for injection molds according to claim 1, characterized in that, The lower surface of the upper mold (3) is fixedly connected to a slide rod (2), and the side surface of the slide rod (2) is slidably connected to the lower mold (1).

6. The extended ejection stroke device for injection molds according to claim 1, characterized in that, The side surface of the pressure rod (6) is slidably connected to the slide plate (7), and the end of the pressure rod (6) away from the upper mold (3) is in contact with the pressure block (13) during operation.

7. The extended ejection stroke device for injection molds according to claim 1, characterized in that, The upper surface of the pressure block (13) is fixedly connected to a limiting rod (11), and the side surface of the limiting rod (11) is slidably connected to the slide plate (7).

8. The extended ejection stroke device for injection molds according to claim 7, characterized in that, A limiting spring (10) is fixedly connected to the upper surface of the slide plate (7), and the end of the limiting spring (10) away from the slide plate (7) is fixedly connected to the limiting rod (11).

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