Core pulling mechanism and injection mold
By designing a core pulling mechanism with guides and limiting parts, the problem of unstable product inverted structure caused by forced demolding is solved, and the stability and efficient mold release of the product during demolding is achieved.
Patent Information
- Application Number
- CN202420266848.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-04
AI Technical Summary
During forced release, the inverted structure will be subjected to stretching or extrusion pressure, resulting in unstable dimensions of the product inverted structure, especially when using fiber-added plastic materials.
A core extraction mechanism is designed to drive the core extraction bundle to move through the driving member, and drive the slider core to retract into the inner cavity of the slider seat to achieve separation from the product structure. The core extraction mechanism includes a slider base, a core extraction bundle, a slider core and a driving member. Through the guide and a limiting part on the core extraction bundle, the slider core is retracted and returned.
This core extraction mechanism can ensure that there is no adhesion or jam between the product structure and the slider core, avoid damage or deformation of the product during demolding, solve the problem of unstable product structure caused by forced demolding, and Improved mold release efficiency.
Smart Images
Figure CN222451241U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of injection molds, and in particular to a core pulling mechanism and an injection mold. Background Art
[0002] In modern production, demoulding devices are widely used in the production of various injection molded products. For products without convex undercut structures on the surface of the product, it is only necessary to separate the upper mold and the lower mold when the injection molding is completed to smoothly carry out production; however, for products with convex undercut structures, during production, it is not possible to simply open and close the upper mold and the lower mold to achieve demoulding. Usually, a specific demoulding structure needs to be designed to ensure smooth opening and closing of the mold. Such a demoulding structure is generally called a core pulling mechanism.
[0003] The core pulling mechanism can separate the undercut structure in the product from the mold, thereby achieving smooth demoulding; the core pulling mechanism currently on the market usually adopts a slider core pulling to achieve forced demoulding of the product, which is usually composed of a slider and a movable core rod. During the injection molding process, when the product is completely cooled and solidified, the slider will move backward and drive the movable core rod to move together. The movable core rod is forced out of the undercut structure in the product, completing the demoulding process to achieve forced demoulding of the product; however, during forced demoulding, the undercut structure will be subjected to a certain amount of stretching or extrusion force, resulting in unstable size of the product undercut structure, especially when using fiber-reinforced plastic materials. This is more likely to occur, which will cause trouble to industrial production because the dimensional stability of the product is a very important part of the production process. Utility Model Content
[0004] In order to improve the problem of unstable dimensions of product undercut structure caused by forced demoulding, the present application provides a core pulling mechanism and an injection mold.
[0005] The core pulling mechanism and injection mold provided in this application adopt the following technical solutions:
[0006] A core pulling mechanism is used for separating a product from a mold, comprising a slider seat, a core pulling block and a slider core arranged in the slider seat, wherein the product is arranged on the slider seat, and the slider core is provided with a groove corresponding to the product structure; and further comprising a driving member, wherein the driving member drives the core pulling block to move, drives the slider core to retract into the inner cavity of the slider seat and separate from the product structure, and the driving member continues to drive the core pulling block to move and drives the slider seat to separate from the product.
[0007] By adopting the above technical scheme, when working, the core pulling bundle block is driven to move by the driving member, thereby driving the slider core to retract into the inner cavity of the slider seat, so that the groove on the slider core is separated from the product structure, and the slider core is completely separated from the product structure, realizing one core pulling from the product structure, and then continuing to drive the core pulling bundle block to move by the driving member, the core pulling bundle block drives the entire slider seat to move, so that the entire slider seat is separated from the product, realizing a second core pulling from the product, and completing the entire demoulding work; the present application mainly drives the core pulling bundle block to move directly by the driving member, so that the slider core with a groove retracts downward and moves the core to achieve separation from the product structure. This core pulling method can ensure that there is no adhesion or jamming between the product structure and the slider core, and ensures that the product will not be damaged or deformed during demoulding, and can solve the problem of unstable product structure size caused by forced demoulding; and the core pulling mechanism of the present application has a simpler structure and high working efficiency, and its slider core retracts downward and the core pulling response speed is fast, thereby improving the efficiency of the entire demoulding work.
[0008] In a specific possible implementation scheme, a guide piece is provided on the core pulling block, and the core pulling block drives the slider core to retract and return through the guide piece.
[0009] By adopting the above technical scheme, when demolding is required, the core pulling block is driven to move by the driving member. At this time, the guide member arranged on the core pulling block is utilized. The guide member can achieve the purpose of driving the core pulling block to retract the slider core and separate the undercut structure, thereby ensuring the smooth separation of the slider core and the product structure; after the demolding work is completed, the core pulling block is driven to move in the reverse direction by the driving member. At this time, the setting of the guide member can achieve the purpose of returning the slider core to the initial position, thereby being able to prepare for the next injection molding work cycle.
[0010] In a specific possible implementation manner, the guide member includes a guide inclined surface provided on the core pulling bundle block, a matching inclined surface is provided on the slider core, and the guide inclined surface slides and contacts with the matching inclined surface.
[0011] By adopting the above technical scheme, the sliding contact setting of the guiding bevel and the matching bevel can guide and position each other, and can help the slider core to retract and return along the same path; when demoulding is required, the core pulling block is driven to move by the driving member, and at this time, the matching bevel on the slider core will retract and move toward the inner cavity of the slider seat along the guidance of the guiding bevel on the core pulling block; in the process of returning, the driving member drives the core pulling block to move in the opposite direction, and at this time, the guiding bevel on the core pulling block will move along the matching bevel of the slider core, thereby achieving the purpose of returning the slider core and preparing for the next injection molding work cycle.
[0012] In a specific implementation scheme, the included angle between the guiding inclined surface and the matching inclined surface and the moving direction of the core pulling bundle block is set to C, and C is between 0° and 60°; preferably, C is between 30° and 45°.
[0013] By adopting the above technical scheme, during the service life of the mold, the core pulling block and the slider core will repeatedly move and position. At this time, if the inclination angle is too small, the friction resistance during the core pulling of the core pulling block and the retraction of the slider core will increase, resulting in unstable operation and even problems such as jamming and blocking. If the inclination angle is too large, it will cause wear and loosening of the core pulling block and the slider core, thereby affecting the service life of the mold. By using the above parameter design to limit the inclination angle of the guide bevel and the mating bevel, it is possible to minimize wear and friction while ensuring the accuracy and stability of the core pulling of the core pulling block and the retraction of the slider core.
[0014] In a specific possible implementation scheme, a guiding portion is provided on the guiding inclined surface, a matching groove is provided on the slider core, the guiding portion is inserted into the matching groove, and the matching groove and the guiding portion are in sliding contact with each other.
[0015] By adopting the above technical scheme, during the retraction and return of the slider core, the guide portion will be inserted into the matching groove and slide against the matching slope while the guide slope and the matching slope slide. In this process, the guide portion provided on the guide slope and the matching groove provided on the slider core can ensure the stable matching and sliding of the matching slope of the slider core and the guide slope of the core pulling block, further limit the movement path of the slider core, prevent the deviation from affecting the return of the slider core, and thus ensure the smooth completion of the retraction and return of the slider core.
[0016] In a specific feasible implementation scheme, a limiting portion is provided on the core pulling bundle block, a limiting groove is provided in the slider seat, and the limiting portion slides in the limiting groove; the driving member drives the core pulling bundle block to move, and the limiting portion abuts against the bottom wall of the limiting groove, driving the slider seat to separate from the product.
[0017] By adopting the above technical solution, after completing the core pulling work with the undercut structure, the core pulling block is continued to be driven to move by the driving member, and the limiting part on the core pulling block moves in the limiting groove. When the limiting part abuts against the bottom wall of the limiting groove, the driving member continues to drive the core pulling block to move. At this time, the core pulling block will drive the entire slider seat to move together, so that the entire slider seat withdraws from the product, realizing the second core pulling with the product. This method can ensure that the product will not be damaged or deformed during demolding, and can be smoothly separated from the mold.
[0018] In a specific possible implementation scheme, the horizontal distance from the limiting portion to the bottom wall of the limiting groove is set to a, the horizontal width of the slider core is set to b, and a<b.
[0019] By adopting the above technical solution and utilizing the setting that the horizontal distance from the limiting part to the bottom wall of the limiting groove is smaller than the horizontal width of the slider core, this parameter design method can ensure that after the slider core is retracted and a new extraction is completed, the matching inclined surface and guide groove of the slider core will still partially contact and cooperate with the guiding inclined surface and guide part of the core pulling block, thereby avoiding the separation of the slider core and the core pulling block affecting the subsequent return of the slider core, thereby ensuring that the subsequent return operation of the slider core can be carried out smoothly.
[0020] In a specific possible implementation manner, the driving member comprises a hydraulic cylinder, and a telescopic rod of the hydraulic cylinder is inserted into the slider seat and connected to the core-pulling bundle block.
[0021] By adopting the above technical solution, when working, the hydraulic cylinder is started, and the telescopic rod of the hydraulic cylinder contracts to drive the core pulling block to move, and drive the slider core to retract to achieve separation from the product undercut structure. The hydraulic cylinder can meet the needs of exiting and returning the entire core pulling mechanism.
[0022] In a specific possible implementation scheme, the hydraulic cylinder is fixed to the mold through a fixed plate, the mold is provided with a sliding cavity, the slider seat slides in the sliding cavity, and the telescopic rod of the hydraulic cylinder passes through the fixed plate and is inserted into the sliding cavity to connect with the core pulling block.
[0023] By adopting the above technical solution, before work, the slider seat is installed in the sliding cavity of the mold, and the hydraulic cylinder is fixed to the mold through the fixing plate, so that the telescopic rod of the hydraulic cylinder passes through the fixing rod and is inserted into the sliding cavity and connected with the core pulling bundle block in the slider seat, that is, the entire core pulling mechanism is installed on the mold, so that the subsequent core pulling mechanism can perform secondary core pulling to separate the product from the mold.
[0024] An injection mold comprises the core pulling mechanism as described above.
[0025] In summary, the present application includes at least one of the following beneficial technical effects:
[0026] 1. The present application mainly drives the core-pulling bundle block to move directly through the driving member, so that the slider core with the groove retracts downward and moves the core-pulling to separate from the product structure, completing the first core-pulling demoulding, and then continues to drive the core-pulling bundle block through the driving member to drive the entire slider seat to withdraw from the product, completing the second core-pulling demoulding; this core-pulling method can ensure that there is no adhesion or jamming between the product structure and the slider core, and ensure that the product will not be damaged or deformed during demoulding, thereby solving the problem of unstable product structure size caused by forced demoulding; and the core-pulling mechanism of the present application has a simpler structure and high working efficiency, and its slider core retracts downward and the core-pulling response speed is fast, thereby improving the efficiency of the entire demoulding work;
[0027] 2. The present application utilizes the guide member provided on the core pulling block. When demoulding is required, the guide member can realize the purpose of driving the core pulling block to retract the slider core and separate the structure, thereby ensuring the smooth separation of the slider core and the product structure; after the demoulding work is completed, the setting of the guide member can realize the purpose of returning the slider core to the initial position, thereby preparing for the next injection molding cycle;
[0028] 3. The present application utilizes the setting of the guide portion on the core pulling block. After completing the core pulling work with the undercut structure, the core pulling block continues to be driven to move by the driving member. The limiting portion on the core pulling block moves in the limiting groove. When the limiting portion abuts against the bottom wall of the limiting groove, the driving member continues to drive the core pulling block to move. At this time, the core pulling block will drive the entire slider seat to move together, so that the entire slider seat exits the product, realizing the secondary core pulling and demolding of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a structural schematic diagram of a core pulling mechanism in an embodiment of the present application.
[0030] Figure 2 It is a cross-sectional view used to show the core pulling block, slider seat and slider core.
[0031] Figure 3 It is a schematic diagram for showing the structure of the driving member and the slider seat.
[0032] Figure 4 It is a cross-sectional view used to show the limiting part and the limiting groove.
[0033] Figure 5 It is a schematic diagram for showing the structure of the core pulling block, slider core and guide parts.
[0034] Explanation of the reference numerals in the accompanying drawings: 01, core pulling mechanism; 1, slider seat; 11, inner cavity; 12, slide groove; 13, limit groove; 2, core pulling block; 21, limit part; 3, slider core; 31, groove; 4, driving member; 41, hydraulic cylinder; 411, telescopic rod; 5, guide member; 51, guide slope; 511, guide part; 52, matching slope; 53, matching groove; 6, fixed plate; 7, mold; 71, upper mold; 72, lower mold; 73, sliding cavity. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-5 This application is described in further detail.
[0036] Reference Figure 1 and Figure 2, the embodiment of the present application discloses a core pulling mechanism for separating a product from a mold 7. In this embodiment, the mold 7 includes an upper mold 71 and a lower mold 72, and the core pulling mechanism 01 is disposed between the upper mold 71 and the lower mold 72;
[0037] The core-pulling mechanism 01 includes a slider seat 1, a core-pulling bundle block 2 and a slider core 3 arranged in the inner cavity 11 of the slider seat 1. The product is arranged on the slider seat 1. The slider seat 1 is also provided with a slide groove 12 connected to the inner cavity 11. The slide groove 12 is used for placing and moving the slider core 3. The core-pulling bundle block 2 is horizontally arranged and contacts the slider core 3. The slider core 3 is provided with a groove 31 corresponding to the undercut structure of the product. In this embodiment, the undercut structure of the product includes but is not limited to a hook structure and a protruding structure. The shape and size of the groove 31 are designed according to the shape and size of the undercut structure of the actual product.
[0038] Reference Figure 2 and Figure 3 The core pulling mechanism 01 also includes a driving member 4, which includes a hydraulic cylinder 41. The hydraulic cylinder 41 can meet the use requirements of the entire core pulling mechanism for withdrawal and return. The hydraulic cylinder 41 is fixed to the mold 7 through a fixed plate 6. The mold 7 is provided with a sliding cavity 73. In this embodiment, the hydraulic cylinder 41 is fixed to the lower mold 72 through a fixed plate 6. The lower mold 72 is provided with a sliding cavity 73. The slider seat 1 slides in the sliding cavity 73. The telescopic rod 411 of the hydraulic cylinder 41 passes through the fixed plate 6 and is inserted into the sliding cavity 73 to be connected with the core pulling bundle block 2. In this embodiment, the telescopic rod 411 of the hydraulic cylinder 41 and the core pulling bundle block 2 include but are not limited to being connected by a headless screw;
[0039] The hydraulic cylinder 41 of the driving member 4 contracts and drives the core-pulling block 2 to move to the side away from the product, driving the slider core 3 to move in the slide groove 12 toward the inner cavity 11 of the slider seat 1, that is, the slider core 3 shrinks inward and separates from the undercut structure of the product, completing the first core-pulling demoulding; the hydraulic cylinder 41 of the driving member 4 continues to contract, continues to drive the core-pulling block 2 to move in the inner cavity 11 of the slider seat 1, and drives the entire slider seat 1 to separate from the product, completing the second core-pulling demoulding;
[0040] Before working, the slider seat 1 is installed in the sliding cavity 73 of the mold 7, and the oil hydraulic cylinder 41 is fixed on the lower mold 72 of the mold 7 through the fixing plate 6, so that the telescopic rod 411 of the oil hydraulic cylinder 41 passes through the fixing rod and is inserted into the sliding cavity 73 and connected with the core pulling bundle block 2 in the slider seat 1, that is, the entire core pulling mechanism is installed on the mold 7, so that the subsequent core pulling mechanism can perform secondary core pulling to separate the product from the mold 7;
[0041] During operation, the core pulling block 2 is driven to move in the inner cavity 11 of the slider seat 1 to the side away from the product through the contraction of the oil hydraulic cylinder 41, thereby driving the slider core 3 to move in the slide groove 12 and contract toward the inner cavity 11 of the slider seat 1, so that the groove 31 on the slider core 3 is separated from the undercut structure of the product, and the slider core 3 is completely separated from the undercut structure of the product, realizing a primary core pulling with the undercut structure, and then continuing to be driven by the contraction of the oil hydraulic cylinder 41 to continue to move the core pulling block 2, and the core pulling block 2 drives the entire slider seat 1 to move, so that the entire slider seat 1 is withdrawn from the product, realizing a secondary core pulling with the product, and completing the entire demoulding work;
[0042] The core pulling method implemented by the core pulling mechanism of the present application can ensure that there is no adhesion or jamming between the product's inverted structure and the slider core 3, and ensure that the product will not be damaged or deformed during demolding, thereby solving the problem of unstable size of the product's inverted structure caused by forced demolding; and the core pulling mechanism of the present application has a simpler structure and high working efficiency, and its slider core 3 has a fast response speed for core pulling when it retracts downward, thereby improving the efficiency of the entire demolding work.
[0043] Reference Figure 4 and Figure 5 A guide piece 5 is provided on the core pulling block 2, and the core pulling block 2 drives the slider core 3 to retract and return through the guide piece 5;
[0044] The guide member 5 includes a guide bevel 51 provided on the core pulling block 2, and a matching bevel 52 is provided on the slider core 3. The guide bevel 51 and the matching bevel 52 are slidably abutted against each other. In this embodiment, the guide bevel 51 and the matching bevel 52 are fully fitted together. Through the slidably abutting arrangement of the guide bevel 51 and the matching bevel 52, they can guide and position each other, and can help the slider core 3 to retract and return along the same path.
[0045] A guide portion 511 is provided on the guide slope 51. In the present embodiment, the cross-sectional shape of the guide portion 511 includes but is not limited to a T-shape. A matching groove 53 is provided on the slider core 3. In the present embodiment, the matching groove 53 includes but is not limited to a T-shaped groove. The guide portion 511 is inserted into and abuts against the matching groove 53. The matching groove 53 and the guide portion 511 are slidably abutted. The guide portion 511 provided on the guide slope 51 and the matching groove 53 provided on the slider core 3 can ensure that the matching slope 52 of the slider core 3 and the guide slope 51 of the core pulling block 2 can stably match and slide, further limit the moving path of the slider core 3, prevent the deviation from affecting the return of the slider core 3, thereby ensuring that the retraction and return of the slider core 3 are smoothly completed.
[0046] When demolding is required, the hydraulic cylinder 41 contracts to drive the core pulling block 2 to move. At this time, the matching bevel 52 on the slider core 3 will move inward toward the inner cavity 11 of the slider seat 1 along the guidance of the guide bevel 51 on the core pulling block 2. At the same time, the guide part 511 will be inserted into the matching groove 53 and slide against it, thereby ensuring that the slider core 3 is smoothly separated from the undercut structure of the product; in the process of returning, the hydraulic cylinder 41 extends to drive the core pulling block 2 to move in the opposite direction. At this time, the guide bevel 51 on the core pulling block 2 will move along the matching bevel 52 of the slider core 3, and the guide part 511 will slide along the matching groove 53, thereby achieving the purpose of returning the slider core 3 and preparing for the next injection molding cycle.
[0047] The included angle between the guide bevel 51 and the matching bevel 52 and the moving direction of the core pulling block 2 is set to C, and C is in the range of 0°-60°; preferably, C is in the range of 30°-45°; during the service life of the mold 7, the core pulling block 2 and the slider core 3 will repeatedly perform movement and positioning operations. At this time, if the inclination angle is too small, it will increase the friction resistance during the core pulling of the core pulling block 2 and the retraction of the slider core 3, resulting in unstable operation or even jamming and other problems, while if the inclination angle is too large, it will cause wear and loosening of the core pulling block 2 and the slider core 3, thereby affecting the service life of the mold 7; by designing the included angle between the guide bevel 51 and the matching bevel 52 and the moving direction of the core pulling block 2 to be 30°-45°, so as to limit the inclination angle of the guide bevel 51 and the matching bevel 52, it is possible to minimize wear and friction while ensuring the accuracy and stability of the core pulling of the core pulling block 2 and the retraction of the slider core 3.
[0048] Reference Figure 4 and Figure 5 The core pulling block 2 is provided with a limiting portion 21, and a limiting groove 13 is provided on the inner wall of the inner cavity 11 of the slider seat 1, and the limiting portion 21 slides and conflicts in the limiting groove 13; the hydraulic cylinder 41 contracts to drive the core pulling block 2 to move, and the limiting portion 21 abuts against the bottom wall of the limiting groove 13, driving the slider seat 1 to move out of the product; after completing the core pulling work with the undercut structure, the hydraulic cylinder 41 continues to contract and drive the core pulling block 2 to move, and the limiting portion 21 on the core pulling block 2 moves in the limiting groove 13. When the limiting portion 21 abuts against the bottom wall of the limiting groove 13, the hydraulic cylinder 41 contracts and continues to drive the core pulling block 2 to move. At this time, the core pulling block 2 will drive the entire slider seat 1 to move together, so that the entire slider seat 1 withdraws from the product, realizing the secondary core pulling with the product. This method can ensure that the product will not be damaged or deformed during demoulding, and can be smoothly separated from the mold 7.
[0049] The horizontal distance from the limiting portion 21 to the bottom wall of the limiting groove 13 is set to a, and the horizontal width of the slider core 3 is set to b, a<b. In the present embodiment, b / 2<a<b. By setting the horizontal distance from the limiting portion 21 to the bottom wall of the limiting groove 13 to be smaller than the horizontal width of the slider core 3, this parameter design method can ensure that after the slider core 3 is retracted and a new extraction is completed, the matching inclined surface 52 of the slider core 3 and the guide groove will still partially contact and cooperate with the guiding inclined surface 51 and the guide portion 511 of the core pulling block 2, so as to avoid the separation of the slider core 3 and the core pulling block 2 and affect the subsequent return of the slider core 3, thereby ensuring that the subsequent return operation of the slider core 3 can be carried out smoothly.
[0050] The present application also provides an injection mold, including the core pulling mechanism 01 as described above. In this embodiment, the injection mold includes but is not limited to an injection mold for producing medical devices.
[0051] The implementation principle of the embodiment of the present application is as follows: before working, the slider seat 1 is installed in the sliding cavity 73 of the mold 7, and the oil hydraulic cylinder 41 is fixed to the mold 7 through the fixing plate 6, so that the telescopic rod 411 of the oil hydraulic cylinder 41 passes through the fixing rod and is inserted into the sliding cavity 73 to connect with the core pulling bundle block 2 in the slider seat 1, that is, the entire core pulling mechanism is installed on the mold 7, so that the subsequent core pulling mechanism can perform secondary core pulling to separate the product from the mold 7;
[0052] When demoulding is required, the driving member 4 is driven, specifically, the hydraulic cylinder 41 contracts to drive the core pulling block 2 to move to the side away from the product, thereby driving the slider core 3 to move in the slide groove 12 and retract toward the inner cavity 11 of the slider seat 1. At this time, the matching inclined surface 52 on the slider core 3 will move inward toward the inner cavity 11 of the slider seat 1 along the guidance of the guide inclined surface 51 on the core pulling block 2. At the same time, the guide part 511 will be inserted into the matching groove 53 and slide against it, playing the role of guiding and positioning, so that the groove 31 on the slider core 3 is separated from the undercut structure of the product, and the slider core 3 is completely separated from the undercut structure of the product, realizing one-time core pulling demoulding with the undercut structure of the product;
[0053] After completing the core pulling work with the undercut structure, the oil hydraulic cylinder 41 continues to contract and drive the core pulling bundle block 2 to move, and the limiting portion 21 on the core pulling bundle block 2 moves in the limiting groove 13. When the limiting portion 21 abuts against the bottom wall of the limiting groove 13, the oil hydraulic cylinder 41 contracts and continues to drive the core pulling bundle block 2 to move. At this time, the core pulling bundle block 2 will drive the entire slider seat 1 to move together, so that the entire slider seat 1 withdraws from the product, realizing the secondary core pulling demoulding with the product;
[0054] When the slider core 3 needs to be returned, the hydraulic cylinder 41 extends to drive the core pulling block 2 to move in the opposite direction. At this time, the guide inclined surface 51 on the core pulling block 2 moves along the matching inclined surface 52 of the slider core 3, and the guide part 511 slides along the matching groove 53, so that the slider core 3 can be returned to its original position and prepare for the next injection molding cycle.
[0055] The present application mainly drives the core-pulling block 2 to move directly through the driving member 4, so that the slider core 3 with the groove 31 retracts downward and moves the core to achieve separation from the product's inverted structure, completing one core-pulling demoulding, and then continues to drive the core-pulling block 2 through the driving member 4 to drive the entire slider seat 1 to withdraw from the product, completing the second core-pulling demoulding; this core-pulling method can ensure that there is no adhesion or jamming between the product's inverted structure and the slider core 3, and ensure that the product will not be damaged or deformed during demoulding, thereby solving the problem of unstable size of the product's inverted structure caused by forced demoulding; and the core-pulling mechanism of the present application has a simpler structure and high working efficiency, and its slider core 3 has a fast response speed for core-pulling when it retracts downward, thereby improving the efficiency of the entire demoulding work.
[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A core pulling mechanism for separating a product from a mold (7), characterized in that: The invention comprises a slider seat (1), a core pulling block (2) and a slider core (3) arranged in the slider seat (1), wherein the product is arranged on the slider seat (1), and the slider core (3) is provided with a groove (31) corresponding to the product structure; and further comprises a driving member (4), wherein the driving member (4) drives the core pulling block (2) to move, drives the slider core (3) to retract into the inner cavity (11) of the slider seat (1) and separate from the product structure, and the driving member (4) continues to drive the core pulling block (2) to move and drives the slider seat (1) to separate from the product.
2. The core pulling mechanism according to claim 1, characterized in that: The core pulling block (2) is provided with a guide member (5), and the core pulling block (2) drives the slider core (3) to retract and return via the guide member (5).
3. The core pulling mechanism according to claim 2, characterized in that: The guide member (5) comprises a guide inclined surface (51) provided on the core pulling bundle block (2), a matching inclined surface (52) is provided on the slider core (3), and the guide inclined surface (51) and the matching inclined surface (52) are in sliding contact with each other.
4. The core pulling mechanism according to claim 3, characterized in that: The included angle between the guiding inclined surface (51) and the matching inclined surface (52) and the moving direction of the core pulling bundle block (2) is set to C, and C is in the range of 0°-60°.
5. The core pulling mechanism according to claim 3, characterized in that: A guiding portion (511) is provided on the guiding inclined surface (51), a matching groove (53) is provided on the slider core (3), the guiding portion (511) is inserted into the matching groove (53), and the matching groove (53) and the guiding portion (511) are in sliding contact with each other.
6. The core pulling mechanism according to claim 1, characterized in that: A limiting portion (21) is provided on the core-pulling bundle block (2), a limiting groove (13) is provided in the slider seat (1), and the limiting portion (21) slides in the limiting groove (13); the driving member (4) drives the core-pulling bundle block (2) to move, and the limiting portion (21) abuts against the bottom wall of the limiting groove (13), thereby driving the slider seat (1) to separate from the product.
7. The core pulling mechanism according to claim 6, characterized in that: The horizontal distance from the limiting portion (21) to the bottom wall of the limiting groove (13) is set to a, and the horizontal width of the slider core (3) is set to b, wherein a<b.
8. The core pulling mechanism according to claim 1, characterized in that: The driving member (4) comprises a hydraulic cylinder (41), and a telescopic rod (411) of the hydraulic cylinder (41) is inserted into the slider seat (1) and connected to the core-pulling bundle block (2).
9. The core pulling mechanism according to claim 8, characterized in that: The oil hydraulic cylinder (41) is fixed to the mold (7) via a fixing plate (6); a sliding cavity (73) is provided on the mold (7); the slider seat (1) slides in the sliding cavity (73); and the telescopic rod (411) of the oil hydraulic cylinder (41) passes through the fixing plate (6) and is inserted into the sliding cavity (73) to be connected to the core-pulling bundle block (2).
10. An injection mold, characterized in that: It comprises a core pulling mechanism as described in any one of claims 1 to 9.