A double-click position product is formed by an injection mold

Abstract

The utility model discloses a kind of double buckle position product forming injection mold, it is related to mould technical field, including mutually matched upper die assembly and lower die assembly, mechanism chamber is formed between upper die assembly and lower die assembly, mechanism chamber inside is provided with upper die kernel and lower die kernel, and die cavity is formed between upper die kernel and lower die kernel;First insert and second insert are provided in die cavity, first insert has with the profiling structure corresponding to big buckle position, middle hole is opened in second insert, slidingly cooperated with slide column in middle hole, slide column is provided with slope, slope is provided with inclined T type slide rail, third insert is slidingly cooperated on inclined T type slide rail, third insert is provided with small buckle position profiling end, small buckle position profiling end is embedded into buckling groove and protrudes from second insert surface;Space inside die cavity is ingeniously utilized, and reasonable stripping sequence, avoid that stripping is the pulling that product receives, improve the forming quality of product, reduce the defective rate of product.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to an injection mold for molding double-button products. Background Technology

[0002] Products with snap-fit ​​joints are very common in injection molding, and their design and application have distinct characteristics and considerations. In general, a snap-fit ​​joint is a mechanical structure that enables quick connection, fixation, and disassembly between components through elastic deformation. Its core feature is replacing or reducing the use of traditional fasteners such as screws and adhesives.

[0003] The demolding method for ordinary single-lock products mainly relies on the inclined ejector mechanism in the mold to convert the vertical mold opening motion into an inclined motion, allowing the lock to detach from the undercut structure of the mold. However, when the product has a large lock within its hole, and within that large lock is a structure with smaller locks, the existing demolding method is difficult to adapt. Due to the multi-channel structure inside the product and the superposition of double locks, it is difficult to design an optimal inclined ejector mechanism in the mold. Furthermore, if the demolding sequence is not designed properly, the lock can easily be forcibly pulled and deformed.

[0004] However, when the product structure becomes more complex, such as when there are internal snap-fits inside the product groove and small snap-fits at the opening, traditional demolding solutions face serious challenges. This double-snap-fit ​​structure mainly presents two major problems: Mold space and structural limitations: The complex internal structure of the multi-channel system makes it difficult to arrange multiple inclined ejector mechanisms within the limited mold space. Interference between the mechanisms is very likely to occur, which greatly increases the design difficulty.

[0005] Demolding sequence and product damage risk: If the demolding sequence of large and small fasteners is not designed properly, uneven tensile stress will be generated during the demolding process, which can easily cause plastic deformation, tearing or even breakage of small fasteners, resulting in product scrap.

[0006] Therefore, it is necessary to propose a new technical solution to address the above problems. Utility Model Content

[0007] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a double-locking product molding injection mold, comprising an upper mold assembly and a lower mold assembly that cooperate with each other, wherein a mechanism cavity is formed between the upper mold assembly and the lower mold assembly, wherein an upper mold core connected to the upper mold assembly and a lower mold core connected to the lower mold assembly are disposed inside the mechanism cavity, and the upper mold core and the lower mold core are closed to form a mold cavity for molding the product; The mold cavity is provided with a first insert and a second insert. The end of the first insert has a contoured structure corresponding to the large buckle position of the product. One end of the second insert is fixed to the first insert, and the other end extends into the mechanism cavity. A central hole is opened in the second insert. A sliding column is slidably fitted in the central hole. The sliding column is provided with an inclined surface that gradually narrows towards the first insert. An inclined T-shaped slide rail is provided on the inclined surface. A third insert is slidably fitted on the inclined T-shaped slide rail. A small buckle position contoured end is provided on the third insert. A buckling groove communicating with the central hole is opened on the second insert. The small buckle position contoured end is embedded in the buckling groove and protrudes from the surface of the second insert. The cavity of the mechanism is provided with a first sliding mechanism located between the upper mold assembly and the lower mold assembly. When the mold is opened, the sliding column is moved horizontally, causing the third insert to retract toward the central hole, and causing the small snap-fit ​​end to retract into the snap-fit ​​groove. The lower mold assembly is provided with a second sliding mechanism on its outer side, which is used to drive the first insert, the second insert and the slide column to move out of the mold cavity.

[0009] As a further embodiment of this utility model: the first sliding mechanism includes a sliding seat disposed in the mechanism chamber, a first sliding position is disposed on the sliding seat, a movable block is disposed in the first sliding position, and an oblique hole is opened on the movable block, wherein the movable block is fixedly connected to the sliding column. It also includes an upper block connected to the upper mold assembly, the lower end of which is connected to a slanted guide rod, which intersects with the slanted hole to form a sliding fit relationship.

[0010] As a further embodiment of this utility model: the second sliding mechanism includes a mounting seat fixed to the outside of the lower mold assembly, a hydraulic cylinder is mounted on the mounting seat, a telescopic shaft is provided on the hydraulic cylinder, and the telescopic shaft extends into the mechanism cavity and connects to the sliding seat; The row position seat is fixedly connected to the second insert.

[0011] As a further embodiment of the present invention: the first insert is provided with a clearance groove on the side facing the second insert, and the clearance groove is connected to the central hole; The relief groove is shaped to fit the end of the sliding column, and the end of the sliding column can be inserted into the relief groove.

[0012] As a further embodiment of this utility model: the third insert is provided with a fastening section, and the small buckle position contour end is formed on the surface of the fastening section; The fastening section and the fastening groove are fitted together. When the sliding column moves outward and the third insert retracts inward, the small fastening position contour end retracts into the fastening groove, while the fastening section remains fitted into the fastening groove.

[0013] As a further embodiment of this utility model: the cavity of the mechanism is also provided with two guide pillars, and a second sliding position is formed between the two guide pillars, and the sliding position seat is slidably engaged in the second sliding position.

[0014] As a further embodiment of this utility model: the first insert is provided with a dovetail groove, and the second insert is provided with a dovetail tenon, wherein the dovetail tenon and the dovetail groove are interlocked.

[0015] Compared with the prior art, the beneficial effects of this technical solution are as follows: In the technical solution of this utility model, the cooperation between the inclined T-shaped slide rail and the third insert is cleverly utilized. The first sliding mechanism located in the upper mold assembly and the lower mold assembly is designed so that during the mold opening process, the outward movement of the slide column drives the third insert to retract into the central hole of the second insert, thereby causing the small snap-fit ​​end on the third insert to retract into the snap-fit ​​groove opened on the second insert. Then, the second sliding mechanism is used to drive the first insert, the second insert and the slide column to move outward from the mold cavity, avoiding the lower snap-fit ​​of the product being pulled during the demolding process. By cleverly utilizing the space inside the mold cavity and the reasonable demolding sequence, the product is prevented from being pulled during demolding, improving the molding quality of the product and reducing the defect rate.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural schematic diagram of the lower mold assembly of this utility model; Figure 3 This is a top view of the first and second row mechanisms of this utility model. Figure 4 yes Figure 3 A cross-sectional view along the AA direction; Figure 5 This is an exploded structural diagram of the first and second row positions of this utility model; Figure 6 This is an exploded structural diagram of the first insert, the second insert, and the sliding column of this utility model; Figure 7 This is a schematic diagram of the structure of the sliding column of this utility model; Figure 8 This is a schematic diagram of the product structure to which this utility model applies; The corresponding labels in the attached diagram are explained as follows: 1. Upper mold assembly; 2. Lower mold assembly; 3. Upper mold core; 4. Lower mold core; 5. First insert; 6. Second insert; 7. Center hole; 8. Sliding column; 9. Inclined surface; 10. Inclined T-shaped slide rail; 11. Third insert; 12. Small snap-fit ​​conforming end; 13. Snap-fit ​​groove; 14. First sliding mechanism; 141. Sliding seat; 142. First sliding mechanism; 143. Movable block; 144. Inclined hole; 145. Upper sliding block; 146. Inclined guide rod; 15. Second sliding mechanism; 151. Mounting seat; 152. Hydraulic cylinder; 153. Telescopic shaft; 16. Relief groove; 17. Snap-fit ​​section; 18. Guide column; 19. Second sliding mechanism; 20. Dovetail groove; 21. Dovetail tenon. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-8 A double-locking product is formed by an injection mold, including an upper mold assembly 1 and a lower mold assembly 2 that cooperate with each other. A mechanism cavity is formed between the upper mold assembly 1 and the lower mold assembly 2. An upper mold core 3 connected to the upper mold assembly 1 and a lower mold core 4 connected to the lower mold assembly 2 are provided inside the mechanism cavity. After the upper mold core 3 and the lower mold core 4 are closed, a mold cavity for molding the product is formed. The mold cavity is provided with a first insert 5 and a second insert 6. The end of the first insert 5 has a contour structure corresponding to the large buckle position of the product. One end of the second insert 6 is fixed to the first insert 5, and the other end extends into the mechanism cavity. A central hole 7 is provided in the second insert 6. A sliding column 8 is slidably fitted in the central hole 7. The sliding column 8 is provided with an inclined surface 9 that gradually narrows towards the first insert 5. An inclined T-shaped slide rail 10 is provided on the inclined surface 9. A third insert 11 is slidably fitted on the inclined T-shaped slide rail 10. A small buckle position contour end 12 is provided on the third insert 11. A buckle groove 13 communicating with the central hole 7 is provided on the second insert 6. The small buckle position contour end 12 is embedded in the buckle groove 13 and protrudes from the surface of the second insert 6. The mechanism cavity is provided with a first sliding mechanism 14 located between the upper mold assembly 1 and the lower mold assembly 2. It is used to drive the sliding column 8 to perform translational operation when the mold is opened, so that the third insert 11 performs an inward movement toward the central hole 7, and drives the small snap-position contour end 12 to retract into the snap-fit ​​groove 13. A second sliding mechanism 15 is provided on the outside of the lower mold assembly 2, which is used to drive the first insert 5, the second insert 6 and the slide 8 out of the mold cavity.

[0021] Specifically, during mold operation, after the upper mold assembly 1 and lower mold assembly 2 are closed, the upper mold core 3 and lower mold core 4 are joined to form a mold cavity. The end of the first insert 5 is used to form the large snap-fit ​​part inside the product. The second insert 6 is fixed to the first insert 5 and is used to form the complete groove of the product. Simultaneously, the small snap-fit ​​conforming end 12 of the third insert 11, protruding from the surface of the second insert 6, is used to form the small snap-fit ​​part at the product opening. When the mold opens, the first sliding mechanism 14 between the upper mold assembly 1 and lower mold assembly 2 drives the sliding column 8 to perform a translational movement. Because the inclined surface 9 on the sliding column 8 is provided with an inclined T-shaped sliding... The third insert 11 is slidably fitted on the inclined T-shaped slide rail 10. Therefore, as the slide column 8 moves outward in the central hole 7, the third insert 11 is pulled by the inclined T-shaped slide rail 10. At the same time, the third insert 11 is restricted by the position of the snap-fit ​​groove 13 on the second insert 6. Therefore, the third insert 11 cannot move horizontally with the slide column 8, but can only move vertically. This causes the small snap-fit ​​contour end 12 to retract into the snap-fit ​​groove 13. Then, the second sliding mechanism 15 drives the first insert 5, the second insert 6 and the slide column 8 to move outward from the mold cavity, which facilitates the subsequent demolding operation of the product. In summary, the technical solution of this utility model cleverly utilizes the cooperation between the inclined T-shaped slide rail 10 and the third insert 11, and designs the first sliding mechanism 14 located in the upper mold assembly 1 and the lower mold assembly 2. During the mold opening process, the outward movement of the slide column 8 drives the third insert 11 to retract into the central hole 7 of the second insert 6, thereby causing the small snap-fit ​​contour end 12 on the third insert 11 to retract into the snap-fit ​​groove 13 opened on the second insert 6. Then, the second sliding mechanism 15 drives the first insert 5, the second insert 6, and the slide column 8 to move outward from the mold cavity, avoiding the lower snap-fit ​​of the product being pulled during demolding. By cleverly utilizing the space inside the mold cavity and the reasonable demolding sequence, the product is prevented from being pulled during demolding, improving the molding quality of the product and reducing the defect rate.

[0022] Based on the above embodiments, it is further proposed that the first positioning mechanism 14 includes a positioning seat 141 disposed in the mechanism chamber, a first positioning position 142 disposed on the positioning seat 141, a movable block 143 disposed in the first positioning position 142, and an oblique hole 144 opened on the movable block 143, wherein the movable block 143 is fixedly connected to the sliding column 8. It also includes an upper block 145 connected to the upper mold assembly 1, and an inclined guide rod 146 connected to the lower end of the upper block 145. The inclined guide rod 146 and the inclined hole 144 intersect to form a sliding fit relationship.

[0023] Specifically, when the upper mold assembly 1 opens, it drives the upper block 145 to move upward. Since the inclined guide rod 146 of the upper block 145 is inserted into the inclined hole 144 of the movable block 143, the vertical force during mold opening is converted into the horizontal translation movement of the movable block 143. The movable block 143 drives the sliding column 8 to move outward, so that the small snap-fit ​​end 12 of the third insert 11 retracts into the snap-fit ​​groove 13. The first row position 142 on the row position 141 is used to provide guidance constraints for the active block 143, ensuring that the active block 143 moves along a predetermined route.

[0024] Based on the above embodiments, the second sliding mechanism 15 is further proposed to include a mounting base 151 fixed to the outside of the lower mold assembly 2, a hydraulic cylinder 152 is mounted on the mounting base 151, a telescopic shaft 153 is provided on the hydraulic cylinder 152, and the telescopic shaft 153 extends into the mechanism cavity and is connected to the sliding seat 141. Among them, the row position seat 141 is fixedly connected to the second insert 6.

[0025] Specifically, the mounting base 151 provides a mounting foundation for the hydraulic cylinder 152. Then, the telescopic shaft 153 of the hydraulic cylinder 152 is fixedly connected to the sliding seat 141, and the sliding seat 141 is fixedly connected to the second insert 6. Therefore, when the hydraulic cylinder 152 drives the telescopic shaft 153 to perform telescopic movement, the telescopic shaft 153 can drive the first insert 5, the second insert 6, and the slide column 8 to move during the process of pulling out the sliding seat 141. The outward movement of the slide column 8 is achieved by the sliding seat 141 driving the movable block 143 to move, which pulls on the slide column 8.

[0026] Based on the above embodiments, it is further proposed that the first insert 5 is provided with a relief groove 16 on the side facing the second insert 6, and the relief groove 16 is connected to the central hole 7; The relief groove 16 is shaped to fit the end of the slide post 8, and the end of the slide post 8 can be inserted into the relief groove 16.

[0027] Specifically, the opening of the relief groove 16 on the first insert 5 allows the end of the slide post 8 to be inserted into the relief groove 16, providing sufficient space for the slide post 8 to move forward, so as to ensure that the third insert 11 can move up and down.

[0028] Based on the above embodiments, it is further proposed that the third insert 11 is provided with a fastening section 17, and the small fastening position contour end 12 is formed on the surface of the fastening section 17; In this design, the snap-fit ​​section 17 and the snap-fit ​​groove 13 are fitted together. When the sliding post 8 moves outward and the third insert 11 retracts inward, driving the small snap-fit ​​contour end 12, the small snap-fit ​​contour end 12 retracts into the snap-fit ​​groove 13, while the snap-fit ​​section 17 remains fitted into the snap-fit ​​groove 13, which is more conducive to the synchronous movement of the sliding post 8 and the second insert 6.

[0029] Based on the above embodiments, it is further proposed that two guide posts 18 are also provided in the cavity of the mechanism, and a second sliding position 19 is formed between the two guide posts 18, with the sliding position seat 141 slidingly engaged in the second sliding position 19.

[0030] Specifically, the second guide post 19 formed between the two guide posts 18 is used to provide guidance and restraint for the guide post 141, ensuring that the guide post 141 moves along a predetermined route.

[0031] Based on the above embodiments, it is further proposed that the first insert 5 is provided with a dovetail groove 20 and the second insert 6 is provided with a dovetail tenon 21, wherein the dovetail tenon 21 and the dovetail groove 20 form a mortise and tenon interlocking relationship.

[0032] Specifically, when assembling the first insert 5 and the second insert 6, the dovetail groove 20 of the first insert 5 is aligned with the dovetail tenon 21 on the second insert 6 and then inserted, so that the first insert 5 and the second insert 6 form an interlocking relationship.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An injection mold for molding a double-button product, characterized in that, It includes an upper mold assembly (1) and a lower mold assembly (2) that cooperate with each other. A mechanism cavity is formed between the upper mold assembly (1) and the lower mold assembly (2). An upper mold core (3) connected to the upper mold assembly (1) and a lower mold core (4) connected to the lower mold assembly (2) are provided inside the mechanism cavity. After the upper mold core (3) and the lower mold core (4) are closed, a mold cavity for molding products is formed. The mold cavity is provided with a first insert (5) and a second insert (6). The end of the first insert (5) has a contour structure corresponding to the large buckle position of the product. One end of the second insert (6) is fixed to the first insert (5), and the other end extends to the mechanism cavity. A central hole (7) is provided in the second insert (6). A sliding column (8) is slidably fitted in the central hole (7). The sliding column (8) is provided with an inclined surface (9) that gradually narrows towards the first insert (5). An inclined T-shaped slide rail (10) is provided on the inclined surface (9). A third insert (11) is slidably fitted on the inclined T-shaped slide rail (10). A small buckle position contour end (12) is provided on the third insert (11). A buckle groove (13) communicating with the central hole (7) is provided on the second insert (6). The small buckle position contour end (12) is embedded in the buckle groove (13) and protrudes from the surface of the second insert (6). The cavity of the mechanism is provided with a first sliding mechanism (14) located between the upper mold assembly (1) and the lower mold assembly (2), which is used to drive the sliding column (8) to perform translational operation when the mold is opened, so that the third insert (11) performs an inward movement toward the central hole (7), and drives the small buckle contour end (12) to retract into the buckling groove (13). The lower mold assembly (2) is provided with a second sliding mechanism (15) on its outer side, which is used to drive the first insert (5), the second insert (6) and the slide (8) out of the mold cavity.

2. The double-button product molding according to claim 1 is characterized by having an injection mold, The first sliding mechanism (14) includes a sliding seat (141) disposed in the mechanism chamber, a first sliding position (142) disposed on the sliding seat (141), a movable block (143) disposed in the first sliding position (142), and an oblique hole (144) provided on the movable block (143), wherein the movable block (143) is fixedly connected to the sliding column (8); It also includes an upper block (145) connected to the upper mold assembly (1), and the lower end of the upper block (145) is connected to a slanted guide rod (146), which intersects with the slanted hole (144) to form a sliding fit relationship.

3. The double-locking product molding according to claim 2 is characterized by having an injection mold, The second sliding mechanism (15) includes a mounting base (151) fixed to the outside of the lower mold assembly (2), a hydraulic cylinder (152) is mounted on the mounting base (151), a telescopic shaft (153) is provided on the hydraulic cylinder (152), and the telescopic shaft (153) extends into the mechanism cavity and is connected to the sliding seat (141). The row position seat (141) is fixedly connected to the second insert (6).

4. The double-locking product molding according to claim 1 is characterized by having an injection mold, The first insert (5) has a relief groove (16) on the side facing the second insert (6), and the relief groove (16) is connected to the central hole (7); The relief groove (16) is shaped to fit the end of the slide column (8), and the end of the slide column (8) can be inserted into the relief groove (16).

5. The double-locking product molding according to claim 1 is characterized by having an injection mold, wherein... The third insert (11) is provided with a fastening section (17), and the small buckle-shaped end (12) is formed on the surface of the fastening section (17); The fastening section (17) and the fastening groove (13) are in a descent fit. When the sliding column (8) moves outward and the third insert (11) retracts inward, the small fastening position contour end (12) retracts into the fastening groove (13), while the fastening section (17) remains fitted into the fastening groove (13).

6. The double-button product molding according to claim 3 is characterized by having an injection mold, The cavity of the mechanism is also provided with two guide posts (18), and a second row position (19) is formed between the two guide posts (18). The row position seat (141) is slidably engaged in the second row position (19).

7. The double-locking product molding according to claim 1 is characterized by having an injection mold, The first insert (5) has a dovetail groove (20), and the second insert (6) has a dovetail tenon (21). The dovetail tenon (21) and the dovetail groove (20) are interlocked.

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