Inverted buckle removing mechanism for rear mold core of injection mold

Abstract

The utility model discloses an inverted buckle removing mechanism for a rear mold core of an injection mold, and relates to the technical field of stripping of injection molds. The pushing plate ascends and descends on the lower mold base through the second hydraulic rod, it is ensured that a product is smoothly disengaged from an injection mold, then when a second sliding shaft on the movable block makes contact with a check block, the second sliding shaft is compressed downwards, the movable block rotates on the supporting frame through the rotating shaft, the first sliding shaft at the other end of the movable block is driven upwards, and the product is separated from the injection mold. The supporting plate is pushed through the first sliding shaft, the second ejector rod on the supporting plate and the limiting plate are pushed in a sliding mode, secondary ejection work is achieved, and through direct ejection of the first ejector rod and secondary ejection of the second ejector rod, it can be more effectively guaranteed that a product is smoothly disengaged from a mold through a double-ejection mechanism; and in the demolding process, uniform distribution is achieved in the bottom reverse buckle removing area, production stagnation caused by demolding difficulty is reduced, and therefore the overall production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection mold stripping, in particular to a stripping mechanism for a rear mold core of an injection mold. Background Art

[0002] During the production process of injection molds, after the product is formed in the mold, it needs to be removed from the mold smoothly for subsequent processing and treatment.

[0003] The reference patent (publication number: CN220031037U; publication date: 2023-11-17) discloses an anti-deformation adjustable inclined ejector and undercut mechanism for plastic parts, which relates to the field of mold technology and includes a base with a square structure, a top plate installed above the base, a plurality of first electric telescopic rods connecting the top plate and the base in the middle, an injection pipe embedded in the top plate, an upper mold plate installed at the lower end of the injection pipe, a lower mold plate correspondingly installed below the upper mold plate, and a top mold structure installed at the bottom of the lower mold plate. The upper mold plate and the injection pipe are arranged to be threadedly connected, and the bottom of the lower mold plate is supported and connected to the support column through a clamping block, so that the mold plate can be replaced easily without replacing the entire structure, and the operation is convenient. The first electric telescopic rods are respectively installed on the left and right sides of the mold plate. The first electric telescopic rods drive the top plate to move upward, so that the upward pulling force on the left and right sides of the mold plate is even, so that the left and right ends of the upper mold plate can be lifted upward at the same time without damaging the workpiece.

[0004] Based on the above patent, after the injection mold is used to injection mold the plastic part, when the inner wall of the plastic part is made with an undercut, the ejector rod and the undercut of the plastic part need to be ejected from the core together during demolding. Then, the traditional demolding mechanism often adopts a single ejection method, which is difficult to meet the demolding requirements of complex mold structures. It is often difficult to ensure the uniform distribution of the ejection force in the entire undercut area through a single ejection mechanism, which may cause the ejection force in some areas to be too large, causing product deformation or damage, and the ejection force in some areas to be too small, then the demolding may not be smooth, and when the ejection force is too large, it is easy to cause damage to the mold and the product. In the ejection process, there is often a lack of necessary shock-absorbing and buffering mechanisms, resulting in damage to the mold and the product when the ejection force is too large. For this reason, the utility model provides a mechanism for ejecting the undercut of the rear mold core of the injection mold. Utility Model Content

[0005] In response to the deficiencies in the prior art, the utility model provides a demoulding mechanism for the rear mold core of an injection mold, which solves the problem that traditional demoulding mechanisms often adopt a single ejection method, which is difficult to meet the demoulding requirements of complex mold structures. It is often difficult to ensure the uniform distribution of the ejection force in the entire demoulding area through a single ejection mechanism, which may cause the ejection force in some areas to be too large, causing deformation or damage to the product, while the ejection force in some areas is too small, and the mold may not be demoulded smoothly. When the ejection force is too large, it is easy to cause damage to the mold and the product. During the ejection process, there is often a lack of necessary shock-absorbing and buffering mechanisms, resulting in the problem that when the ejection force is too large, the mold and the product will still be damaged.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a stripping mechanism for the rear mold core of an injection mold, comprising a lower mold base, first hydraulic rods are provided on both sides of the interior of the lower mold base, the telescopic ends of the first hydraulic rods are fixed to the upper mold base, and a stripping mechanism for ejecting the rear mold core of the injection mold is provided on the lower mold base, the stripping mechanism comprising:

[0007] The ejection assembly includes a cavity groove opened inside the lower mold base, a push plate connected by a lifting assembly is provided inside the cavity groove, support plates connected by a supporting assembly are provided on both sides of the upper end surface of the push plate, second ejector rods are fixed on both sides of the upper end surface of the support plate, a movable block connected by a movable assembly is provided on one side of the edge of the upper end surface of the push plate, and a stopper is fixed to the side wall of the cavity groove;

[0008] The shock-absorbing assembly comprises a fixed block fixedly connected at the center of the upper end surface of the push plate, and the upper end surface of the fixed block is provided with a first push rod connected through an elastic assembly.

[0009] Preferably, a template is provided at the fitting connection between the upper end surface of the lower mold seat and the upper mold seat, the lower mold seat and the template are fixedly connected, the lifting assembly includes a second hydraulic rod fixedly connected to the inside of the lower end of the lower mold seat, and the push plate is fixedly connected at the telescopic end of the second hydraulic rod.

[0010] Preferably, the elastic component includes a shock-absorbing spring fixedly connected to the upper end surface of the fixed block, a cavity slide groove is opened inside the lower end of the first push rod, and the bottom of the first push rod is located at the upper end of the shock-absorbing spring, a damping support rod is arranged inside the shock-absorbing spring, the bottom end of the damping support rod is fixedly connected to the fixed block, a positioning rod is fixedly connected to the edge of the upper end surface of the fixed block, and a positioning groove is opened on the lower end surface of the first push rod to be slidably connected to the positioning rod.

[0011] Preferably, the support assembly includes top columns fixed on both sides of the upper end surface of the push plate, the upper end surfaces of the top columns are fixedly connected with rubber pads, and the support plate is located at the upper end surface of the rubber pads and is fitly connected.

[0012] Preferably, the movable component includes a support frame fixedly connected to one side of the upper end face edge of the pushing plate, the movable block is located inside the support frame and is connected by a rotating shaft, the movable block is located at one end of the lower end face of the support plate and is rotatably connected to the first sliding shaft through the rotating shaft, the movable block is located at one end of the lower end face of the stop block and is rotatably connected to the second sliding shaft through the rotating shaft, the upper end inner wall of the cavity groove is fixedly connected to the limiting plate, the second push rod is slidably connected to the limiting plate, the lower end face of the limiting plate is fixedly connected to a reset spring, the inner ring of the reset spring is provided with a telescopic sleeve rod, and the two ends of the telescopic sleeve rod are respectively fixedly connected to the limiting plate and the pushing plate.

[0013] Preferably, both side walls of the push plate are provided with protrusions, and the inner wall of the cavity groove is provided with limiting grooves for sliding of the protrusions, and the push plate forms a sliding structure through the protrusions and the limiting grooves.

[0014] Beneficial effects

[0015] The utility model provides a mechanism for removing the back mold core of an injection mold. Compared with the prior art, it has the following advantages:

[0016] Firstly, the practical ejector plate is lifted and lowered on the lower mold base by the second hydraulic rod, driving the first ejector rod on the ejector plate to be driven, directly acting on the product, providing the necessary ejection force, and ensuring that the product is smoothly removed from the injection mold. Then, when the second sliding shaft on the movable block contacts the stop block, the second sliding shaft is compressed downward, so that the movable block is rotated on the support frame through the rotating shaft, so that the first sliding shaft at the other end of the movable block is driven upward, and the support plate is pushed by the first sliding shaft, so that the second ejector rod on the support plate and the limit plate are slid and pushed to realize secondary ejection. Through the direct ejection of the first ejector rod and the secondary ejection of the second ejector rod, the double ejection mechanism can more effectively ensure that the product is smoothly removed from the mold, and evenly distribute the bottom undercut area during demoulding, reduce production stagnation caused by demoulding difficulties, and thus improve overall production efficiency.

[0017] Secondly, when the push plate of the utility model is pushed, the first push rod is pushed, directly acting on the product, providing the necessary ejection force, so that the product can be removed from the injection mold, and the first push rod is provided to perform a certain shock-absorbing and buffering effect on the push plate through the shock-absorbing spring and the damping support rod, effectively absorbing the impact force during the pushing process, reducing the damage to the product and the mold caused by excessive ejection force, and when the first push rod is subjected to shock-absorbing compression, the first push rod is slid and compressed on the fixed block through the positioning groove and the positioning rod, ensuring the stability of the first push rod during shock-absorbing and buffering, preventing the first push rod from deflecting or shaking during the pushing process, thereby ensuring the accuracy and reliability of the pushing action. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the lower mold base and the upper mold base of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal connection structure of the lower mold base of the present utility model;

[0021] Figure 4 This is a schematic diagram of the enlarged connection structure of point B of the present invention;

[0022] Figure 5 This is a schematic diagram of the enlarged connection structure of point A of the present invention.

[0023] In the figure: 1. Lower mold base; 2. Template; 201. Upper mold base; 202. First hydraulic rod; 3. Cavity groove; 301. Second hydraulic rod; 302. Push plate; 303. First ejector rod; 4. Limit plate; 401. Support plate; 402. Fixed block; 403. Shock-absorbing spring; 404. Damping support rod; 405. Positioning rod; 406. Positioning groove; 407. Cavity slide; 5. Limit groove; 6. Ejector column; 601. Rubber pad; 7. Support frame; 701. Movable block; 702. First slide shaft; 703. Second slide shaft; 704. Stop block; 705. Second ejector rod; 8. Return spring; 801. Telescopic sleeve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 The utility model provides a technical solution: a stripping mechanism for the rear mold core of an injection mold, comprising a lower mold base 1, first hydraulic rods 202 are provided on both sides of the interior of the lower mold base 1, and an upper mold base 201 is fixed to the telescopic end of the first hydraulic rod 202. A stripping mechanism for ejecting the rear mold core of the injection mold is provided on the lower mold base 1, and the stripping mechanism includes:

[0026] The ejection assembly includes a cavity 3 defined within the lower mold base 1. A push plate 302 connected via a lifting assembly is disposed within the cavity 3. Support plates 401 connected via a supporting assembly are disposed on both sides of the upper end surface of the push plate 302. Second ejector pins 705 are fixed to both sides of the upper end surface of the support plate 401. A movable block 701 connected via a movable assembly is disposed on one edge of the upper end surface of the push plate 302. Stoppers 704 are fixed to the side walls of the cavity 3.

[0027] The shock absorbing assembly includes a fixed block 402 fixedly connected to the center of the upper end surface of the push plate 302. The upper end surface of the fixed block 402 is provided with a first push rod 303 connected via an elastic assembly.

[0028] In a preferred embodiment, a template 2 is provided at the fitting connection between the upper end surface of the lower mold base 1 and the upper mold base 201. The lower mold base 1 and the template 2 are fixedly connected. The lifting assembly includes a second hydraulic rod 301 fixedly connected to the inside of the lower end of the lower mold base 1. The push plate 302 is located at the telescopic end of the second hydraulic rod 301 and is fixedly connected. The upper mold base 201 and the lower mold base 1 are driven to open and close by the first hydraulic rod 202. The push plate 302 is lifted and lowered on the lower mold base 1 by the second hydraulic rod 301, driving the first push rod 303 on the push plate 302 to drive, directly acting on the product, providing the necessary ejection force, and ensuring that the product is smoothly removed from the injection mold.

[0029] In a preferred embodiment, the elastic component includes a shock-absorbing spring 403 fixedly connected to the upper end surface of the fixed block 402, a cavity slide groove 407 is provided inside the lower end of the first push rod 303, and the bottom of the first push rod 303 is located at the upper end of the shock-absorbing spring 403, a damping support rod 404 is provided inside the shock-absorbing spring 403, and the bottom end of the damping support rod 404 is fixedly connected to the fixed block 402, and a positioning rod 405 is fixedly connected to the edge of the upper end surface of the fixed block 402, and a positioning groove 406 is provided on the lower end surface of the first push rod 303 to be slidably connected to the positioning rod 405. When the push plate 302 is pushed, the first push rod 303 is pushed, directly acting on the product. The product is provided with the necessary ejection force so that the product can be removed from the injection mold, and the first ejector rod 303 is provided to perform a certain shock-absorbing and buffering effect on the ejection plate 302 through the shock-absorbing spring 403 and the damping support rod 404, effectively absorbing the impact force during the ejection process, and reducing the damage to the product and the mold caused by excessive ejection force. When the first ejector rod 303 is performing shock-absorbing compression, the first ejector rod 303 is slid and compressed on the fixed block 402 through the positioning groove 406 and the positioning rod 405, ensuring the stability of the first ejector rod 303 during shock-absorbing and buffering, preventing the first ejector rod 303 from deflecting or shaking during the ejection process, thereby ensuring the accuracy and reliability of the ejection action.

[0030] In a preferred embodiment, the support assembly includes a top column 6 fixed on both sides of the upper end surface of the push plate 302, the upper end surface of the top column 6 is fixedly connected to a rubber pad 601, and the support plate 401 is located at the upper end surface of the rubber pad 601 and is fitly connected. The top column 6 and rubber pad 601 are provided to support the support plate 401 and to reduce shock when the support plate 401 descends.

[0031] In a preferred embodiment, the movable component includes a support frame 7 fixedly connected to one side of the upper end surface edge of the pushing plate 302, the movable block 701 is located inside the support frame 7 and is connected by a rotating shaft, the movable block 701 is located at one end of the lower end surface of the support plate 401 and is rotatably connected to the first sliding shaft 702 through the rotating shaft, the movable block 701 is located at one end of the lower end surface of the stop block 704 and is rotatably connected to the second sliding shaft 703 through the rotating shaft, the upper end inner wall of the cavity groove 3 is fixedly connected to the limit plate 4, the second push rod 705 is slidably connected to the limit plate 4, the lower end surface of the limit plate 4 is fixedly connected to the return spring 8, the inner ring of the return spring 8 is provided with a telescopic sleeve rod 801, and the two ends of the telescopic sleeve rod 801 are respectively fixedly connected to the limit plate 4 and the pushing plate 302, and when the set pushing plate 302 is driven by the second hydraulic rod 301, the support frame 7 on the pushing plate 302 is driven upward. After the first push rod 703 is released, the second push rod 705 on the support plate 401 is pushed upwards, and the second push rod 705 on the support plate 401 is pushed upwards to realize the secondary ejection. The double ejection mechanism can more effectively ensure the smooth removal of the product from the mold, reduce the production stagnation caused by the difficulty in demoulding, and thus improve the overall production efficiency. The support plate 401 is compressed under the limit plate 4 by the return spring 8 and the telescopic sleeve 801. When the ejection is completed, the support plate 401 is acted upon by the return spring 8 and returns to its original position.

[0032] In a preferred embodiment, the two side walls of the push plate 302 are provided with protrusions, and the inner wall of the cavity groove 3 is provided with a limiting groove 5 for the sliding of the protrusion. The push plate 302 forms a sliding structure through the protrusion and the limiting groove 5, which is used to ensure the stability of the push plate 302 during the lifting and lowering drive to avoid shaking and deviation.

[0033] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] During operation, first, the upper mold base 201 and the lower mold base 1 are driven to open and close by the first hydraulic rod 202, and the push plate 302 is lifted and lowered on the lower mold base 1 by the second hydraulic rod 301, driving the first ejector rod 303 on the push plate 302 to drive, directly acting on the product, providing the necessary ejection force, and ensuring that the product is smoothly removed from the injection mold. Then, when the push plate 302 is driven by the second hydraulic rod 301, the support frame 7 on the push plate 302 is driven upward, and then the second ejector rod 303 on the movable block 701 is driven upward. When the sliding shaft 703 contacts the stopper 704, the second sliding shaft 703 is compressed downward, so that the movable block 701 rotates on the support frame 7 through the rotating shaft, so that the first sliding shaft 702 at the other end of the movable block 701 is driven upward, and the support plate 401 is pushed by the first sliding shaft 702, so that the second ejector 705 on the support plate 401 slides and pushes on the limiting plate 4, realizing secondary ejection. Through the direct ejection of the first ejector 303 and the secondary ejection of the second ejector 705, the double ejection mechanism can more effectively ensure that the product is smoothly removed from the mold;

[0035] At the same time, the first push rod 303 is provided to perform a certain shock-absorbing and buffering effect on the pushing plate 302 through the shock-absorbing spring 403 and the damping support rod 404, effectively absorbing the impact force during the pushing process, and reducing the damage to the product and the mold caused by excessive ejection force. When the first push rod 303 is performing shock-absorbing compression, the first push rod 303 slides and compresses on the fixed block 402 through the positioning groove 406 and the positioning rod 405, ensuring the stability of the first push rod 303 during shock absorption and buffering, preventing the first push rod 303 from deflecting or shaking during the pushing process, thereby ensuring the accuracy and reliability of the pushing action.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanism for releasing the back mold core of an injection mold, comprising a lower mold base (1), wherein first hydraulic rods (202) are provided on both sides of the interior of the lower mold base (1), and an upper mold base (201) is fixed to the telescopic end of the first hydraulic rod (202), characterized in that: The lower mold base (1) is provided with a stripping mechanism for ejecting the rear mold core of the injection mold, and the stripping mechanism comprises: An ejection assembly comprises a cavity groove (3) opened inside the lower mold base (1), a push plate (302) connected by a lifting assembly is provided inside the cavity groove (3), support plates (401) connected by a supporting assembly are provided on both sides of the upper end surface of the push plate (302), second ejector rods (705) are fixed on both sides of the upper end surface of the support plate (401), a movable block (701) connected by a movable assembly is provided on one side of the edge of the upper end surface of the push plate (302), and a stopper (704) is fixed on the side wall of the cavity groove (3); The shock-absorbing assembly comprises a fixed block (402) fixedly connected to the center of the upper end surface of the push plate (302); the upper end surface of the fixed block (402) is provided with a first push rod (303) connected via an elastic assembly.

2. The back-end stripping mechanism for the rear mold core of an injection mold according to claim 1, characterized in that: A template (2) is provided at the joint between the upper end surface of the lower mold base (1) and the upper mold base (201); the lower mold base (1) and the template (2) are fixedly connected; the lifting assembly comprises a second hydraulic rod (301) fixedly connected to the interior of the lower end of the lower mold base (1); and the push plate (302) is fixedly connected to the telescopic end of the second hydraulic rod (301).

3. The mechanism for removing the back mold core of an injection mold according to claim 1, characterized in that: The elastic component includes a shock-absorbing spring (403) fixedly connected to the upper end surface of the fixed block (402); a cavity slide groove (407) is provided inside the lower end of the first push rod (303); and the bottom of the first push rod (303) is located at the upper end of the shock-absorbing spring (403); a damping support rod (404) is provided inside the shock-absorbing spring (403); the bottom end of the damping support rod (404) is fixedly connected to the fixed block (402); a positioning rod (405) is fixedly connected to the edge of the upper end surface of the fixed block (402); and a positioning groove (406) is provided on the lower end surface of the first push rod (303) and is slidably connected to the positioning rod (405).

4. The mechanism for removing the back mold core of an injection mold according to claim 1, characterized in that: The support assembly comprises top columns (6) fixed on both sides of the upper end surface of the push plate (302), the upper end surface of the top column (6) is fixedly connected with a rubber pad (601), and the support plate (401) is located on the upper end surface of the rubber pad (601) and is in close contact with it.

5. The mechanism for removing the back mold core of an injection mold according to claim 1, characterized in that: The movable assembly includes a support frame (7) fixedly connected to one side of the upper end edge of the push plate (302), the movable block (701) is located inside the support frame (7) and is connected through a rotating shaft, the movable block (701) is located at one end of the lower end surface of the support plate (401) and is rotatably connected to a first sliding shaft (702) through a rotating shaft, the movable block (701) is located at one end of the lower end surface of the stop block (704) and is rotatably connected to a second sliding shaft (703) through a rotating shaft, the upper end inner wall of the cavity groove (3) is fixedly connected to the limit plate (4), the second push rod (705) is slidably connected to the limit plate (4), the lower end surface of the limit plate (4) is fixedly connected to a reset spring (8), the inner ring of the reset spring (8) is provided with a telescopic sleeve rod (801), and the two ends of the telescopic sleeve rod (801) are respectively fixedly connected to the limit plate (4) and the push plate (302).

6. The mechanism for removing the back mold core of an injection mold according to claim 1, characterized in that: The two side walls of the push plate (302) are provided with protrusions, the inner wall of the cavity groove (3) is provided with a limiting groove (5) for the sliding of the protrusion, and the push plate (302) forms a sliding structure through the protrusion and the limiting groove (5).

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