Multi-undercut part forming die

Abstract

The present application relates to injection mold technical field, provide a kind of multi-inverted buckle piece forming die, including for forming product one, product one has inclined cylinder structure, outer wall undercut and groove structure;Including movable die and fixed die, movable die includes movable die seat, movable die plate is installed on movable die seat;Movable die is further provided with product one stripping mechanism, it includes oblique core-pulling slidingly disposed on movable die seat, movable die seat is further provided with for driving oblique driving element sliding of oblique core-pulling;Oblique core-pulling is fixed with outer wall undercut slider on it;Oblique core-pulling is further fixed with linkage block, groove slider is slidably arranged on movable die plate;Oblique core-pulling is further provided with core-pulling sliding groove, and core-pulling sliding groove is slidably connected with inclined cylinder core-pulling.Borrowing this, the present application is realized by setting up outer wall undercut slider, linkage block and inclined cylinder core-pulling on oblique core-pulling in limited space, stripping of multiple different direction undercut structure is realized.In compact structure, the forming of complex product is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a multi-undercut molding mold. Background Art

[0002] When an injection molded product has an undercut structure that forms a certain angle with the parting surface, demoulding is usually achieved by using a tilting ejector or core pulling method.

[0003] For products with complex structures, such as Figure 1 As shown, the structure comprises an oblique cylinder 101, with its central axis forming a predetermined angle with the parting line. The outer wall of the oblique cylinder also forms an angle with the parting line, forming an outer wall undercut 102. The structure also includes a groove structure 103. A single product can have multiple undercuts with different mold opening directions, and the distribution of these undercuts is relatively concentrated. Using existing demolding methods, it is impossible to accommodate multiple oblique ejectors or core pulls with different movement directions within the limited space, making molding this type of product challenging.

[0004] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Summary of the Invention

[0005] In view of the above-mentioned defects, the present invention mainly provides a multi-undercut forming mold to solve the technical problem of forming products with multiple undercut structures and different mold opening directions.

[0006] In order to solve the above problems, the present invention provides a multi-undercut molding die, including a die for molding a product, wherein the product has an oblique cylinder structure, an outer wall undercut and a groove structure; the die includes a movable die and a fixed die, wherein the movable die includes a movable die base, and a movable die plate is mounted on the movable die base;

[0007] The movable mold is also provided with a product demoulding mechanism; the product demoulding mechanism includes an oblique core pulling device slidably provided on the movable mold base, and the movable mold base is also provided with an oblique driving member for driving the oblique core pulling device to slide;

[0008] The oblique core pulling device is fixed with an outer wall undercut slider for forming an outer wall of the product; the oblique core pulling device is also fixed with a linkage block, and the linkage block has a retreat groove; the movable plate is slidably provided with a groove slider for forming a groove structure of the product; the groove slider is in sliding engagement with the retreat groove;

[0009] The oblique core pulling device is also provided with a core pulling slot, and the core pulling slot is slidably connected to form the oblique cylinder core pulling device of the oblique cylinder structure; a blind hole is provided inside the oblique cylinder core pulling device, and a core pulling spring is provided in the blind hole, and the lower end of the core pulling spring abuts against the oblique core pulling device.

[0010] The multi-undercut part forming die according to the present application simultaneously forms two products; two sets of outer wall undercut sliding blocks and inclined core pulling are symmetrically arranged on the inclined core pulling; two retreat grooves are symmetrically arranged on the linkage block; two groove sliding blocks are symmetrically arranged on the movable die plate.

[0011] The multi-undercut part forming die according to the present application; the driving block is fixedly connected to the fixed die; the driving column is fixedly arranged on the driving block; the driving hole is arranged on the inclined core pulling and is slidably connected with the driving column.

[0012] The multi-undercut part forming die according to the present application; the guiding groove is arranged on the inclined core pulling; the supporting block is fixedly arranged on the movable die seat and is slidably connected with the guiding groove.

[0013] The multi-undercut part forming die according to the present application; the inclined driving part is an inclined pulling oil cylinder.

[0014] The multi-undercut part forming die according to the present application; the limiting block is arranged in the core pulling sliding groove.

[0015] The multi-undercut part forming die according to the present application is also used for forming product two; the side wall of the product two has an undercut structure; the product two demolding mechanism is arranged on the forming die; the product two demolding mechanism comprises a sliding groove part fixedly arranged on the fixed die; the forming sliding groove is arranged on the sliding groove part;

[0016] The forming sliding block is slidably connected with the forming sliding groove; the spring hole is arranged on the forming sliding block; the ejection spring is arranged in the spring hole; the two ends of the ejection spring abut against the fixed die and the forming sliding block respectively; the forming sliding block is slidably arranged on the movable die plate.

[0017] The undercut top block for forming the undercut structure is slidably arranged on the forming sliding block; the top block spring for pushing the undercut top block to move relative to the forming sliding block is arranged in the forming sliding block.

[0018] The multi-undercut part forming die according to the present application; the sleeve rod is fixedly connected to the fixed die; the ejection spring is sleeved on the sleeve rod.

[0019] The multi-undercut part forming die according to the present application; one end of the undercut top block is fixedly connected with the stop block; the top block spring is clamped between the stop block and the undercut top block; the leading end of the undercut top block is provided with a guide surface.

[0020] The multi-undercut part forming die according to the present application; the sliding plate is fixedly arranged on the movable die plate; the forming sliding block is slidably connected with the sliding plate.

[0021] In summary, the present invention achieves demolding of multiple undercut structures with different orientations within a limited space by providing an outer wall undercut slider, linkage block, and oblique core puller on the oblique core puller. This compact structure enables the molding of complex products. The molding mold of the present invention also includes a demolding mechanism for product 2; by providing a barbed top block on the molding slider, elastic force is utilized to delay demolding of the barbed structure of product 2 during mold opening, preventing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of product 1 of the present invention;

[0023] Figure 2 It is a structural schematic diagram of product 2 of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the forming mold of the present invention;

[0025] Figure 4 yes Figure 3 Schematic diagram of the structure of the local area;

[0026] Figure 5 yes Figure 4 A partial cutaway diagram of a demoulding mechanism of a product;

[0027] Figure 6 yes Figure 4 A schematic structural diagram of a product-ejection mechanism from one direction;

[0028] Figure 7 It is a partial cross-sectional schematic diagram of the second demoulding mechanism of the product of the present invention from the first direction;

[0029] Figure 8 This is a structural diagram of the working principle of the second demoulding mechanism of the product of the present invention;

[0030] Figure 9 It is a partial cross-sectional schematic diagram of the second demoulding mechanism of the product of the present invention from the first direction;

[0031] In the figure: 1-movable die base, 11-movable die plate, 12-support block, 13-slide plate, 14-hook block, 15-thrust block; 2-oblique core pulling, 21-outer wall undercut slider, 22-oblique pull cylinder, 24-cooling water pipe, 25-guide groove, 26-linkage block, 261-retreat groove; 27-groove slider, 28-core pulling chute, 281-limiting block; 3-oblique cylinder core pulling, 31-core pulling spring; 4-driving block, 41-driving column; 5-forming slider, 51-ejection spring, 52-hook ejector block, 521-introduction surface; 53-sleeve rod, 54-ejector block spring, 55-stop block; 6-slide member, 61-connecting rod, 62-forming slide; 100-product one, 101-oblique cylinder structure, 102-outer wall undercut, 103-groove structure; 200-product two, 201-hook structure. DETAILED DESCRIPTION

[0032] See also Figure 1 The present invention provides a multi-undercut molding die for molding a product 100, wherein the product 100 has an oblique cylinder structure 101, an outer wall undercut 102, and a groove structure 103; see Figure 3 , including a movable mold and a fixed mold, the movable mold includes a movable mold base 1, and a movable mold plate 11 is installed on the movable mold base 1;

[0033] See also Figure 4 The movable mold is also provided with a product demoulding mechanism; Figure 5 The product demoulding mechanism includes an oblique core pulling 2 slidably arranged on the movable mold base 1, and the movable mold base 1 is also provided with an oblique driving member for driving the oblique core pulling 2 to slide;

[0034] Preferably, the oblique driving member of the present invention is an oblique pull cylinder 22;

[0035] Optionally, the oblique driving member of the present invention may also be other power devices, such as a pneumatic cylinder or an electric cylinder.

[0036] The oblique core pulling device 2 is fixed with an outer wall undercut slider 21 for forming an outer wall undercut 102 of a product 100;

[0037] The sliding direction of the oblique core pulling 2 is consistent with the mold opening direction of the outer wall undercut 102 of the product 100. Those skilled in the art can adaptively set the angle between the sliding direction of the oblique core pulling 2 and the mold opening direction according to the specific product structure.

[0038] See also Figure 6 The oblique core pulling 2 is further fixed with a linkage block 26, and the linkage block 26 has a retreat groove 261; the movable plate 11 is slidably provided with a groove slider 27 for forming the groove structure 103 of the product 100; the groove slider 27 is in sliding cooperation with the retreat groove 261;

[0039] The groove slider 27 is restricted by the movable plate 11 and slides back and forth on the movable plate 11 in a straight line.

[0040] When the mold is opened, the oblique pulling cylinder 22 drives the oblique core pulling 2 to slide, thereby driving the outer wall undercut slider 21 to separate from the outer wall undercut 102 of product 100; at the same time, the linkage block 26 moves, and the retreat groove 261 generates a driving force on the groove slider 27, causing it to slide along a predetermined trajectory on the movable template 11, thereby separating from the groove structure 103 of product 100.

[0041] The present invention provides an outer wall undercut slider 21 and a groove slider 27 on the oblique core pulling 2. When the mold is opened, the outer wall undercut slider 21 and the groove slider 27 act synchronously, so that the two undercut structures with different directions on the product 100 are demolded at the same time, simplifying the structure.

[0042] As an embodiment, a guide groove 25 is provided on the oblique core pulling 2, and a support block 12 is fixed on the movable mold base 1 to slide with the guide groove 25; so that the oblique core pulling 2 can slide smoothly along the track defined by the guide groove 25, thereby ensuring the accuracy of reset and mold closing.

[0043] The oblique core pulling device 2 is further provided with a core pulling slot 28, which is slidably connected to the oblique cylinder core pulling device 3 for forming the oblique cylinder structure 101; a blind hole is provided inside the oblique cylinder core pulling device 3, and a core pulling spring 31 is provided in the blind hole, and the lower end of the core pulling spring 31 abuts against the oblique core pulling device 2;

[0044] When the mold is opened, the movable mold and the fixed mold are separated, and the core pulling spring 31 applies a pushing force to the inclined cylinder core pulling 3, causing it to move along the core pulling slot 28 until it is separated from the inclined cylinder structure 101.

[0045] When the mold is closed, the movable mold and the fixed mold are close to each other, the inclined cylinder core pulling 3 is pressed back along the core pulling slot 28, and the core pulling spring 31 is compressed and stores energy.

[0046] More preferably, a limit block 281 is provided in the core-pulling chute 28 to limit the maximum stroke of the inclined cylinder core-pulling 3 .

[0047] As an embodiment, the fixed mold is fixed with a driving block 4, and a driving column 41 is fixed on the driving block 4; the inclined cylinder core pulling 3 is provided with a driving hole for slidingly plugging with the driving column 41;

[0048] During mold opening, the movable mold moves backward, and the drive post 41 of the drive block 4 generates a driving force on the slant core pull 3, causing it to move along the core pull chute 28. During the mold opening process, the drive post 41 moves backward relative to the drive hole until it is released from the drive hole. During mold closing, the drive post 41 is reinserted into the drive hole and, as the mold closes, pushes the slant core pull 3 back.

[0049] As an embodiment, the product 100 of the present invention is comprised of two parts, which are assembled into an assembly after molding. The molding die of the present invention simultaneously molds two parts of the product 100; two sets of outer wall undercut sliders 21 and oblique cylinder core pullers 3 are symmetrically disposed on the oblique core puller 2; two symmetrical retreat grooves 261 are formed on the linkage block 26; and two symmetrical groove sliders 27 are disposed on the movable plate 11.

[0050] Two sets of symmetrical product demoulding mechanisms are formed through an oblique core pulling 2, which fully utilizes the mold space and improves the output efficiency.

[0051] The present invention realizes demoulding of multiple undercut structures with different orientations in a limited space by arranging the outer wall undercut slider 21, linkage block 26 and oblique cylinder core pulling 3 on the oblique core pulling 2. The structure is compact and the molding of complex products is realized.

[0052] See also Figure 7 As an embodiment, the multi-fastener molding die of the present invention is also used to mold product 200, and the side wall of product 200 has a barb structure 201; since the barb structure 201 is close to the bottom of the side wall and the distance from the side wall is small, the existing inclined top structure is difficult to apply due to the lack of retreat space.

[0053] The molding die of the present invention is further provided with a second demoulding mechanism for the product; the second demoulding mechanism for the product comprises a slide member 6 fixedly mounted on the fixed die; the slide member 6 is provided with a molding slide 62; the molding slide 62 forms a predetermined angle with the mold opening direction;

[0054] The forming slide 62 is slidably connected to the forming slide 5; a spring hole is formed on the forming slide 5, and an ejection spring 51 is provided in the spring hole; the two ends of the ejection spring 51 respectively abut against the fixed mold and the forming slide 5; the forming slide 5 is slidably arranged on the movable plate 11;

[0055] The forming slider 5 is also provided with a barb top block 52 for forming the barb structure 201; the forming slider 5 is also provided with a top block spring 54 for pushing the barb top block 52 to slide relative to the forming slider 5;

[0056] See also Figure 8 During mold opening, the movable and fixed molds separate, and the forming chute 62 of the chute member 6 generates a driving force on the forming slider 5. Simultaneously, the ejector spring 51 releases its elastic energy, pressing the forming slider 5 against the movable platen 11, causing the forming slider 5 to slide against the movable platen 11 under the driving force. The barb ejector block 52, activated by the ejector block spring 54, remains pressed against the second product 200, preventing damage to its barb structure 201. This action continues until the barb ejector block 52 is completely separated from the second product 200. The second product 200 can then be removed, disengaging its barb structure 201 from the barb ejector block 52.

[0057] The present invention provides a barb top block 52 on the forming slider 5 and utilizes the elastic force to delay the demoulding of the barb structure 201 of the second product 200 when the mold is opened, thereby avoiding damage.

[0058] As an embodiment, the fixed mold is further fixed with a sleeve rod 53, and the ejection spring 51 is sleeved on the sleeve rod 53; the sleeve rod 53 plays the role of fixing the ejection spring 51;

[0059] Due to the limited volume of the chute member 6, it is inconvenient to open a threaded hole. Further, the side of the chute member 6 is also connected to a connecting rod 61, and a threaded hole is drilled in the connecting rod 61, which is fixed to the fixed mold by bolts.

[0060] More preferably, one end of the barb top block 52 is fixedly connected to the stop block 55 , and the top block spring 54 is sandwiched between the stop block 55 and the barb top block 52 to prevent the barb top block 52 from detaching from the forming slider 5 .

[0061] As a preferred solution, the front end of the barb top block 52 is provided with an introduction surface 521, which facilitates contact with the movable template 11 and avoids collision between the two.

[0062] Combine Figure 9 As an embodiment, a hook block 14 is fixed to the movable platen 11 and slidably mounted on the bottom of the forming slide 5. During mold opening, if the ejection spring 51 is over-compressed and unable to provide sufficient elastic force, the hook block 14 exerts a pulling force on the forming slide 5, keeping it attached to the movable platen 11 and preventing it from being pulled away by the fixed mold.

[0063] Furthermore, a slide plate 13 is fixed on the movable plate 11, and the forming slider 5 slides on the slide plate 13; when the mold is opened or closed, the forming slider 5 slides along the slide plate 13 to prevent the movable plate 11 from being worn.

[0064] Furthermore, a thrust block 15 is fixed on the movable platen 11 to limit the sliding limit position of the forming slider 5 on the movable platen 11 .

[0065] As an embodiment, the molding die molds a plurality of second products 200 at the same time, and the molding die is further provided with the same number of second product demoulding mechanisms as the number of the second products 200.

[0066] In summary, the present invention provides a multi-undercut forming mold. By providing an outer wall undercut slider, a linkage block, and an oblique core puller on an oblique core puller, the demolding of multiple undercut structures with different orientations is achieved within a limited space. The compact structure enables the molding of complex products. The forming mold of the present invention is also provided with a demolding mechanism for product two; by providing a barb top block on the forming slider, the elastic force is utilized to delay the demolding of the barb structure of product two when the mold is opened, thereby preventing damage to the barb structure.

[0067] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A multi-undercut molding die for molding a product having an oblique cylinder structure, an outer wall undercut, and a groove structure; characterized in that: It includes a movable mold and a fixed mold, wherein the movable mold includes a movable mold base, and a movable mold plate is installed on the movable mold base; The movable mold is also provided with a product demoulding mechanism; the product demoulding mechanism includes an oblique core pulling device slidably provided on the movable mold base, and the movable mold base is also provided with an oblique driving member for driving the oblique core pulling device to slide; the oblique driving member is an oblique pull cylinder; The oblique core pulling device is fixed with an outer wall undercut slider for forming an outer wall of the product; the oblique core pulling device is also fixed with a linkage block, and the linkage block has a retreat groove; the movable plate is slidably provided with a groove slider for forming a groove structure of the product; the groove slider is in sliding engagement with the retreat groove; When the mold is opened, the oblique pull cylinder drives the oblique core pulling to slide, thereby driving the outer wall undercut slider to separate from the outer wall undercut of product one; at the same time, the linkage block moves, and the retreat groove generates a driving force on the groove slider, causing it to slide along a predetermined trajectory on the movable platen, thereby separating from the groove structure of product one; The oblique core pulling device is also provided with a core pulling slot, and the core pulling slot is slidably connected to form the oblique core pulling device of the oblique cylinder structure; a blind hole is provided inside the oblique core pulling device, and a core pulling spring is provided in the blind hole, and the lower end of the core pulling spring abuts against the oblique core pulling device; When the mold is opened, the movable mold and the fixed mold are separated, and the core pulling spring applies a pushing force to the inclined cylinder core pulling, causing it to move along the core pulling groove until it is separated from the inclined cylinder structure.

2. The multi-undercut forming die according to claim 1, wherein: The forming mold forms two products at the same time; two sets of outer wall inverted sliders and oblique cylinder core pulling are symmetrically arranged on the oblique core pulling; two retreat grooves are symmetrically opened on the linkage block; two groove sliders are symmetrically arranged on the movable template.

3. The multi-undercut forming die according to claim 1, wherein: The fixed mold is fixed with a driving block, and a driving column is fixed on the driving block; and a driving hole for sliding and plugging with the driving column is opened on the inclined cylinder core pulling.

4. The multi-undercut forming die according to claim 1, wherein: A guide groove is provided on the oblique core pulling device, and a support block which is in sliding cooperation with the guide groove is fixed on the movable die seat.

5. The multi-undercut forming die according to claim 1, wherein: A limiting block is provided in the core-pulling chute.

6. The multi-undercut molding die according to any one of claims 1 to 5, further used for molding a second product, wherein the side wall of the second product has a barb structure; The forming mold is also provided with a second demoulding mechanism for the product; the second demoulding mechanism for the product includes a slide member fixed on the fixed mold; the slide member is provided with a forming slide; The forming slide is slidably connected to the forming slider; a spring hole is provided on the forming slider, and an ejection spring is provided in the spring hole; two ends of the ejection spring respectively abut against the fixed mold and the forming slider; the forming slider is slidably arranged on the movable platen; A barb top block for forming a barb structure is also slidably provided on the forming slider; and a top block spring for pushing the barb top block to move relative to the forming slider is also provided in the forming slider.

7. The multi-undercut forming die according to claim 6, wherein: The fixed die is also fixedly connected with a sleeve rod, and the ejection spring is sleeved on the sleeve rod.

8. The multi-undercut forming die according to claim 6, wherein: One end of the barb top block is fixedly connected to the stop block, and the top block spring is clamped between the stop block and the barb top block; and a leading surface is provided at the front end of the barb top block.

9. The multi-undercut forming die according to claim 6, wherein: A slide plate is fixed on the movable plate, and the forming slider is in sliding fit with the slide plate.

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