A press mold

Abstract

The utility model discloses a kind of compression mould, it belongs to forming die field, including upper die and lower die, the upper die includes upper die sleeve plate and the upper die core fixedly installed on upper die sleeve plate, the lower die includes lower die sleeve plate and the lower die core fixedly installed on lower die sleeve plate;The lower die further includes the lower core that cooperates with lower die core, the back of lower core is fixedly connected with lower die drawbar, and lower die drawbar can be laterally slidably arranged in lower die sleeve plate;The upper die further includes the upper core that cooperates with upper die core, the back of upper core is fixedly connected with upper die drawbar, and upper die drawbar can be laterally slidably arranged in upper die sleeve plate;Fixed locking mechanism and movable locking mechanism are respectively provided on the upper die and lower die, and the utility model aims at providing a kind of compression mould, can improve pressing quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of molding dies, specifically a pressing die. Background Technology

[0002] In the food processing industry, materials are often filled into the cavity of a mold, and the product is pressed and formed through the closing and pressure holding operations of the upper and lower molds. After molding, the upper and lower molds separate to open the mold and remove the finished product. However, when pressing spherical or conical structures, or products with inverted or concave features, such as ball-shaped candies, if only a vertical mold opening method is used, the product is easily scratched by the inner wall of the mold cavity or the protruding structure during demolding, resulting in surface damage, increased breakage rate, and decreased yield.

[0003] Furthermore, to ensure the product has a full shape and stable dimensions, pressure holding is required during the molding process. Existing technologies typically rely on external pressing equipment to continuously apply pressure to the mold to achieve pressure holding. This results in the mold occupying the pressing equipment for an extended period, limiting the execution of other processes and reducing the overall production line efficiency. Utility Model Content

[0004] The purpose of this invention is to address the above problems by providing a molding die that can improve molding quality and efficiency.

[0005] To achieve the above objectives, the present invention employs a forming mold, comprising an upper mold and a lower mold. The upper mold includes an upper mold plate and an upper mold core fixedly mounted on the upper mold plate. The lower mold includes a lower mold plate and a lower mold core fixedly mounted on the lower mold plate. During mold closing, the lower mold core and the upper mold core are precisely aligned. The lower mold also includes a lower core that mates with the lower mold core. The lower core and the lower mold core are arranged in pairs. The back of the lower core is fixedly connected to a lower mold pull rod, which can slide laterally. The upper mold is movably mounted within the lower mold plate. The upper mold also includes an upper core that mates with the upper mold core. The upper core and upper mold core are paired, and the back of the upper core is fixedly connected to the upper mold pull strip. The upper mold pull strip is laterally slidable within the upper mold plate. The upper and lower molds are respectively equipped with matching fixed locking mechanisms and movable locking mechanisms. That is, when the upper mold has a fixed locking mechanism, the lower mold has a corresponding movable locking mechanism; when the upper mold has a movable locking mechanism, the lower mold has a corresponding fixed locking mechanism. During mold closing, the upper and lower cores, together with their corresponding mold cores, form a complete cavity for pressing and molding materials. During pressure holding, the fixed and movable locking mechanisms tightly lock the upper and lower molds together. During mold opening, the upper and lower mold pull strips are first driven to slide laterally, causing the upper and lower cores to complete a lateral core-pulling movement to release the lateral covering of the molded product. Subsequently, the upper and lower molds perform a vertical separation action. The above workflow utilizes upper and lower mold pullers to drive the core laterally, fundamentally preventing the product from being scratched or torn by the mold cavity during demolding. This significantly reduces product breakage rate and improves yield and pressing quality. Simultaneously, independent pressure holding is achieved through the mold's own locking mechanism, eliminating the need for continuous pressure from external pressing equipment. This allows the pressing equipment to perform other pressing tasks during the pressure holding period, optimizing equipment resource utilization and ultimately improving the efficiency of the entire production line.

[0006] Furthermore, the cavity surface of the lower mold core includes a cavity side surface and a cavity bottom surface. The bottom of the cavity side surface is fixedly connected to one edge of the cavity bottom surface, and the bottom of the cavity surface of the lower mold core is adjacent to the cavity bottom surface. The lower mold core slides in a direction parallel to the cavity bottom surface. The cavity side surface, cavity bottom surface, and cavity surface of the lower mold core together constitute a dynamically openable and closeable molding cavity. This structure allows the cavity to be opened during mold opening by the lateral core pulling of the lower mold core, greatly facilitating the filling of material and the removal of the molded product. The core pulling direction of the lower mold core is designed to be parallel to the cavity bottom surface. This movement path can most effectively remove the lateral covering of the product, thereby minimizing the negative impact of the demolding process on the product shape. In addition, the cavity bottom surface provides a stable temporary support surface for the material, facilitating its temporary storage and positioning before mold closing.

[0007] Furthermore, the cavity surface of the upper mold core also includes a cavity side surface and a cavity bottom surface. The bottom of the cavity side surface of the upper mold core is fixedly connected to one edge of the cavity bottom surface of the upper mold core. The bottom of the cavity surface of the upper mold core is adjacent to the cavity bottom surface of the upper mold core. The upper mold core slides in a direction parallel to the cavity bottom surface of the upper mold core. The upper and lower mold cores adopt the same and parallel core-pulling movement, ensuring precise alignment of the upper and lower cavities during mold closing, thus simplifying the drive mechanism. For the product portion formed in the upper mold cavity, the upper mold core pulls out in a direction parallel to its upper cavity bottom surface, complementing the movement of the lower mold core. Together, they ensure that the entire product is subjected to uniform force during demolding, and the covering is released simultaneously from both the top and bottom directions, achieving damage-free demolding of the product.

[0008] Furthermore, guide grooves are provided on the back of both the upper and lower mold cores, and sliding blocks are fixedly installed on the back of both the upper and lower mold cores. The guide grooves and sliding blocks form a sliding pair. Through the sliding pair formed by the sliding blocks and guide grooves, high-precision linear guidance is provided for the lateral movement of the upper and lower mold cores, ensuring the smoothness and accuracy of the core pulling and resetting actions.

[0009] Furthermore, the fixed locking mechanism includes a fixed mounting part fixedly installed on the upper mold sleeve plate or the lower mold sleeve plate. The fixed mounting part has a locking hole, and a limiting part extending inward is provided on one side of the edge of the locking hole. The movable locking mechanism includes a movable mounting part fixed on the corresponding lower mold pull bar or upper mold pull bar. The movable mounting part is provided with a vertical column, and an expansion part is fixedly provided at the end of the vertical column. The outer diameter of the expansion part is larger than the outer diameter of the vertical column. Moreover, the outer diameter of the expansion part is larger than the diameter of the locking hole at the limiting part, but smaller than the diameter of other parts of the locking hole. When the mold is closed, the expansion part extends into the locking hole. When the upper mold and the lower mold are locked, the movable mounting part drives the expansion part to move laterally, so that the expansion part and the limiting part at least partially overlap and interlock with each other in the mold closing direction, thereby firmly locking the upper mold and the lower mold into a whole in the mold closing direction, so that the upper mold and the lower mold can become an independent pressure holding unit after mold closing. This eliminates the need to rely on an external press to continuously provide clamping force, which greatly reduces the downtime of the pressing equipment and allows it to perform other tasks during the holding period, thereby significantly improving equipment utilization and production efficiency.

[0010] Furthermore, at least one end of the upper mold pull bar extends out of the upper mold sleeve plate, and at least one end of the lower mold pull bar extends out of the lower mold sleeve plate. The extended ends of the upper mold pull bar and the lower mold pull bar are respectively fixedly connected to the upper mold pull-out part and the lower mold pull-out part. This facilitates the pulling of the upper mold pull bar and the lower mold pull bar.

[0011] Furthermore, to facilitate the installation of the mold core and the molded core onto the upper and lower mold sleeve plates, the upper mold sleeve plate is provided with an upper mounting groove for installing the upper mold core and the upper molded core; the lower mold sleeve plate is provided with a lower mounting groove for installing the lower mold core and the lower molded core; the openings of the upper and lower mounting grooves are arranged opposite to each other along the mold closing direction. Through the upper and lower mounting grooves, the upper and lower mold cavities can automatically achieve high-precision alignment, while the upper and lower mold sleeve plates also provide support for the mold core and the molded core.

[0012] Furthermore, both the upper and lower mold sleeves have sliding grooves on their back sides, and the upper and lower mold pull bars are slidably disposed within the corresponding sliding grooves. The bottoms of the upper and lower mounting grooves each have connecting holes that communicate with the sliding grooves. The sliding grooves provide precise guide tracks for the lateral sliding of the upper and lower mold pull bars, effectively constraining their degrees of freedom and preventing offset or jamming. Simultaneously, the connecting holes at the bottom of the mounting grooves connect the mounting grooves to the sliding grooves, facilitating the movement of the core and movable locking mechanism via the pull bars.

[0013] Furthermore, the back sides of the upper mold sleeve plate and the lower mold sleeve plate are respectively enclosed by a detachable upper mold base plate and a lower mold base plate. The base plate can effectively prevent external dust and impurities from entering the sliding groove and the cavity, while providing great convenience for daily inspection, cleaning and maintenance.

[0014] The beneficial effects of this invention are as follows: By using upper and lower mold pull rods to drive the upper and lower cores in a lateral core-pulling motion, the mold can completely release the lateral undercuts or complex contours of the product before vertical mold opening. This mechanism fundamentally avoids the product scratches, tears, or jamming problems caused by traditional vertical mold opening methods, thereby significantly reducing the product breakage rate, ensuring the integrity of the product's shape, and greatly improving the yield and pressing quality. Simultaneously, through a fixed and movable locking mechanism, the upper and lower molds can be firmly locked together after mold closing, forming an independent pressure-holding unit, eliminating the need for continuous pressure from external pressing equipment. This frees up the pressing equipment during the pressure-holding cycle, allowing it to perform other pressing tasks, optimizing equipment resource utilization, shortening the production cycle, and improving the overall production line efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention in the mold-closed state.

[0016] Figure 2 This is a schematic diagram of the exploded structure of the mold.

[0017] Figure 3 This is a schematic diagram of the upper mold forming surface.

[0018] Figure 4 for Figure 3A magnified schematic diagram of the structure at point A in the middle.

[0019] Figure 5 This is a schematic diagram of the lower mold cross-section structure.

[0020] Figure 6 This is a schematic diagram of the structure of the lower mold forming surface.

[0021] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0022] Figure 8 This is a schematic diagram of the fit between the upper mold plate and the upper mold tie rod.

[0023] Figure 9 This is a three-dimensional structural diagram of the fixed locking mechanism and the movable locking mechanism.

[0024] Figure 10 This is a side view schematic diagram of the fixed locking mechanism and the movable locking mechanism.

[0025] Figure 11 This is a schematic diagram showing the fixed locking mechanism and the movable locking mechanism in the locked state.

[0026] Figure 12 This is a schematic diagram of the three-dimensional structure of the cavity surface of the upper mold core and the upper core.

[0027] Figure 13 This is a schematic diagram of the three-dimensional structure of the upper mold core and the upper mandrel from another perspective.

[0028] Figure 14 This is a schematic diagram of the three-dimensional structure of the back of the upper mold core and the upper core.

[0029] Figure 15 This is a schematic diagram of the three-dimensional structure of the upper mold core and the back of the upper core from another perspective.

[0030] Figure 16 This is a schematic diagram of the three-dimensional structure of the cavity surface of the lower mold core and the lower core.

[0031] Figure 17 This is a three-dimensional structural diagram of the lower mold core and lower mandrel from another perspective.

[0032] Figure 18 This is a schematic diagram of the three-dimensional structure of the lower mold core and the lower core.

[0033] Figure 19 This is a schematic diagram of the three-dimensional structure of the lower mold core and the back of the lower core from another perspective.

[0034] The text labels in the diagram represent: 1. Upper mold; 101. Upper mold sleeve plate; 102. Upper mold core; 103. Upper core; 104. Upper mold pull rod; 105. Upper mounting groove; 106. Upper mold pull-out part; 107. Upper mold base plate; 2. Lower mold; 201. Lower mold sleeve plate; 202. Lower mold core; 203. Lower core; 204. Lower mold pull rod; 205. Lower mounting groove; 206. Lower mold pull-out part; 207. Lower mold base plate; 3. Cavity side; 4. Cavity bottom; 5. Guide groove; 6. Sliding block; 7. Fixed mounting part; 8. Locking hole; 9. Restriction part; 10. Movable mounting part; 11. Vertical column; 12. Expansion part. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0036] Example 1, as Figures 1 to 19 As shown, this embodiment provides a forming mold, including an upper mold 1 and a lower mold 2. The upper mold 1 includes an upper mold sleeve 101. The front side of the upper mold sleeve 101 is machined with an upper mounting groove 105 for embedding and mounting an upper mold core 102 and an upper mold core 103. The dimension of the upper mounting groove 105 along the sliding direction of the upper mold core 103 is greater than the total dimension of the upper mold core 102 and the upper mold core 103 in that direction when the mold is closed, thereby providing the necessary space for the sliding of the upper mold core 103. In this application, the side with the cavity is considered the front side, and its reverse side is considered the back side. The cavity surfaces of the upper mold core 102 and the upper mold core 103 together constitute a complete upper mold cavity. A transverse sliding groove is machined on the back side of the upper mold sleeve 101 by milling or other methods. The upper mold pull bar 104 is slidably disposed in the sliding groove. A sliding block 6 is fixedly provided on the back of the upper core 103. The sliding block 6 and the upper core 103 can be fixed with bolts or integrally formed. The sliding block 6 of the upper core 103 is fixedly connected to the upper mold pull strip 104 by bolts, etc., so that the upper mold pull strip 104 can drive the upper core 103 to move. In order to connect the upper mold pull strip 104 and the sliding block 6 together, and at the same time leave sliding space for the sliding block 6, the back of the upper mounting groove 105 is connected to the sliding groove through a connecting hole. The size of the connecting hole is set to allow the sliding block 6 to connect with the upper mold pull strip and move. The back of the upper mold sleeve plate 101 is closed by a detachable upper mold base plate 107. The upper mold base plate 107 is fixedly connected to the upper mold sleeve plate 101 by bolts or other fasteners.

[0037] The lower mold 2 and the upper mold 1 are symmetrically structured and compatible. The lower mold 2 includes a lower mold sleeve plate 201, with a lower mounting groove 205 on the front for mounting the lower mold core 202 and the lower mold core 203. The dimension of the lower mounting groove 205 along the sliding direction of the lower mold core 203 is larger than the total dimension of the lower mold core 202 and the lower mold core 203 in that direction when the mold is closed, thereby providing the necessary space for the sliding of the lower mold core 203. The back of the lower mold sleeve plate 201 also has a sliding groove, and the lower mold pull bar 204 is slidably disposed in the sliding groove of the lower mold sleeve plate 201. The upper mold pull bar 104 and the lower mold pull bar 204 each have at least one protruding end extending out of the corresponding sleeve plate, and the protruding ends of the upper mold pull bar 104 and the lower mold pull bar 204 are respectively fixedly connected to the upper mold pull-out part 106 and the lower mold pull-out part 206. In this embodiment, both ends of the upper mold pull bar 104 extend out of the upper mold sleeve plate 101, and all the protruding ends on the same side are fixedly connected to an upper mold pull-out part 106; correspondingly, both ends of the lower mold pull bar 204 extend out of the lower mold sleeve plate 201, and all the protruding ends on the same side are fixedly connected to a lower mold pull-out part 206. The back of the lower mold sleeve plate 201 is closed by the lower mold base plate 207. The sliding block 6 on the lower core 203 is fixedly connected to the lower mold pull bar 204 by bolts, etc., so that the lower mold pull bar 204 can drive the lower core 203 to move. In order to connect the lower mold pull bar 204 and the sliding block 6 on the lower core 203 together, and at the same time leave sliding space for the sliding block 6, the back of the lower mounting groove 205 is connected to the sliding groove through a connecting hole. The size of the connecting hole is set to allow the sliding block 6 to connect with the lower mold pull bar 204 and move. Guide grooves 5 are provided on the back of both the upper mold core 102 and the lower mold core 202. The direction of the guide grooves 5 is consistent with the direction of the sliding grooves in their respective sleeves. The guide grooves 5 and the corresponding sliding blocks 6 form a sliding pair. Multiple lower mounting grooves 205 and upper mounting grooves 105 can be arranged in a rectangular array. A set of mold cores and pattern cores are arranged in one mounting groove. The sliding blocks 6 in the same row or column are connected to a pull strip.

[0038] The upper mold core 102 includes a cavity side surface 3 and a cavity bottom surface 4, with the bottom of the cavity side surface 3 fixedly connected to one edge of the cavity bottom surface 4 of the upper mold core 102. The bottom of the cavity surface of the upper mold core 103 is adjacent to the cavity bottom surface 4 of the upper mold core 102, and the upper mold core 103 slides in a direction parallel to the cavity bottom surface 4.

[0039] Correspondingly, the cavity surface of the lower mold core 202 also includes a cavity side surface 3 and a cavity bottom surface 4, with the bottom of the cavity side surface 3 fixedly connected to one edge of the cavity bottom surface 4 of the lower mold core 202. The bottom of the cavity surface of the lower mold core 203 is adjacent to the cavity bottom surface 4 of the lower mold core 202, and the lower mold core 203 slides in a direction parallel to the cavity bottom surface 4.

[0040] The upper mold 1 and the lower mold 2 are respectively provided with a fixed locking mechanism and a movable locking mechanism. The upper and lower molds are locked together by the cooperation of the fixed locking mechanism and the movable locking mechanism.

[0041] Therefore, the fixed locking mechanism includes a fixed mounting part 7 fixedly installed on the upper mold sleeve plate 101 or the lower mold sleeve plate 201. In this embodiment, the fixed mounting part 7 is described as being installed on the lower mold sleeve plate 201. Correspondingly, the movable locking mechanism includes a movable mounting part 10 fixed on the upper mold pull bar. The fixed mounting part 7 and the movable mounting part 10 are respectively installed in the upper and lower mounting grooves. The mold core is not installed in the upper and lower mounting grooves of the fixed mounting part 7 and the movable mounting part 10. At this time, the size of the connecting hole on the back of the upper mounting groove 105 is set to allow the movable mounting part 10 to connect with the upper mold pull bar and move.

[0042] The fixed mounting part 7 is provided with a locking hole 8, and a limiting part 9 extending inward is provided on one side of the edge of the locking hole 8; the movable mounting part 10 is provided with a vertical column 11, which is arranged along the mold closing direction, and an expansion part 12 is fixedly provided at the end of the vertical column 11. The outer diameter of the expansion part 12 is larger than the outer diameter of the vertical column 11; and the outer diameter of the expansion part 12 is larger than the diameter of the locking hole 8 at the limiting part 9, but smaller than the diameter of other parts of the locking hole 8.

[0043] The specific working process is as follows: First, the material is placed on the bottom surface 4 of the cavity of the lower mold core 202. Then, the lower mold 2 is moved to the pressing station by the conveying system, and the upper mold 1 is moved above the station by the lifting equipment. The external drive device drives the upper mold 1 to move downward and close with the lower mold 2, thereby vertically pressing the material between the upper mold 1 and the lower mold 2. After the mold is closed, a cavity is formed by the upper mold core 102, the upper mold core 103, the lower mold core 202, and the lower mold core 203. During this process, the vertical column 11 and the expansion part 12 of the movable locking mechanism are simultaneously inserted downward into the locking hole 8 of the fixed locking mechanism.

[0044] After the mold is closed, the external drive device pulls the upper mold pull bar 104 and the lower mold pull bar 204 laterally through the upper mold pull part 106 and the lower mold pull part 206. During this process, the upper core 103 and the lower core 203 move toward the corresponding mold core cavity side 3, thereby applying lateral pressure to the material to complete the vertical and horizontal composite pressing of the material in the cavity.

[0045] At the same time, the movable mounting part 10 moves laterally, causing the expansion part 12 to move to its outer edge and interlock with the limiting part 9 in the vertical direction, thereby firmly locking the upper mold 1 and the lower mold 2 into one unit to form an independent pressure holding unit.

[0046] After the pressure holding period, the assembled upper and lower molds are moved from the pressing area to the mold opening area via a conveyor belt, with pressure holding completed during the movement. Once the assembled upper and lower molds have moved to the mold opening area, external drive devices such as hydraulic cylinders drive the upper and lower mold pull bars to slide laterally in the opposite direction, causing the upper and lower cores to move laterally along a direction parallel to the bottom surface 4 of their respective cavities, thus first releasing the lateral covering of the product; at the same time, the positions of the expansion part 12 and the limiting part 9 are misaligned, completing the unlocking. Subsequently, the drive device drives the upper mold 1 to rise vertically, achieving the final separation of the upper and lower molds.

[0047] After the upper and lower molds are separated, the molded product is taken out from the opened mold.

[0048] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A forming die, comprising an upper die (1) and a lower die (2), wherein the upper die (1) comprises an upper die plate (101) and an upper die core (102) fixedly mounted on the upper die plate (101), and the lower die (2) comprises a lower die plate (201) and a lower die core (202) fixedly mounted on the lower die plate (201); characterized in that, The lower mold (2) also includes a lower core (203) that cooperates with the lower mold core (202). The back of the lower core (203) is fixedly connected to the lower mold pull strip (204). The lower mold pull strip (204) is slidably disposed in the lower mold sleeve plate (201). The upper mold (1) also includes an upper core (103) that cooperates with the upper mold core (102). The back of the upper core (103) is fixedly connected to the upper mold pull strip (104). The upper mold pull strip (104) is slidably disposed in the upper mold sleeve plate (101). The upper mold (1) and the lower mold (2) are respectively provided with a fixed locking mechanism and a movable locking mechanism.

2. The forming die according to claim 1, characterized in that, The cavity surface of the lower mold core (202) includes a cavity side surface (3) and a cavity bottom surface (4). The bottom of the cavity side surface (3) is fixedly connected to one side edge of the cavity bottom surface (4). The bottom of the cavity surface of the lower mold core (203) is adjacent to the cavity bottom surface (4). The lower mold core (203) slides in a direction parallel to the cavity bottom surface (4).

3. A forming die according to claim 2, characterized in that, The cavity surface of the upper mold core (102) also includes a cavity side surface (3) and a cavity bottom surface (4). The bottom of the cavity side surface (3) of the upper mold core (102) is fixedly connected to one side edge of the cavity bottom surface (4) of the upper mold core (102). The bottom of the cavity surface of the upper mold core (103) is adjacent to the cavity bottom surface (4) of the upper mold core (102). The upper mold core (103) slides in a direction parallel to the cavity bottom surface (4) of the upper mold core (102).

4. A forming die according to claim 3, characterized in that, The back of the upper mold core (102) and the lower mold core (202) are provided with guide grooves (5), and the back of the upper mold core (103) and the lower mold core (203) are provided with sliding blocks (6). The guide grooves (5) and the sliding blocks (6) constitute a sliding pair.

5. A forming die according to claim 1, characterized in that, The fixed locking mechanism includes a fixed mounting part (7) fixedly installed on the upper mold sleeve plate (101) or the lower mold sleeve plate (201). The fixed mounting part (7) is provided with a locking hole (8). A limiting part (9) extending inward is provided on one side of the edge of the locking hole (8). The movable locking mechanism includes a movable mounting part (10) fixedly installed on the corresponding lower mold pull bar or upper mold pull bar. A vertical column (11) is provided on the movable mounting part (10). An expansion part (12) is fixedly provided at the end of the vertical column (11). The outer diameter of the expansion part (12) is larger than the outer diameter of the vertical column (11). Furthermore, the outer diameter of the expansion part (12) is larger than the diameter of the locking hole (8) at the limiting part (9), but smaller than the diameter of other parts of the locking hole (8).

6. A forming die according to claim 1, characterized in that, The upper mold pull bar (104) has at least one end extending out of the upper mold sleeve plate (101), and the lower mold pull bar (204) has at least one end extending out of the lower mold sleeve plate (201). The extended ends of the upper mold pull bar (104) and the lower mold pull bar (204) are respectively fixedly connected to the upper mold pull part (106) and the lower mold pull part (206).

7. A forming die according to claim 1, characterized in that, The upper mold plate (101) is provided with an upper mounting groove (105) for installing the upper mold core (102) and the upper mold core (103); the lower mold plate (201) is provided with a lower mounting groove (205) for installing the lower mold core (202) and the lower mold core (203); the openings of the upper mounting groove (105) and the lower mounting groove (205) are arranged opposite to each other along the mold closing direction.

8. A forming die according to claim 7, characterized in that, The upper mold sleeve plate (101) and the lower mold sleeve plate (201) are both provided with sliding grooves on their back sides. The upper mold pull bar (104) and the lower mold pull bar (204) are slidably disposed in the corresponding sliding grooves. The bottom of the upper mounting groove (105) and the lower mounting groove (205) are respectively provided with connecting holes, which are connected to the sliding grooves.

9. A forming die according to claim 7, characterized in that, The back sides of the upper mold plate (101) and the lower mold plate (201) are respectively closed by the detachable upper mold base plate (107) and the lower mold base plate (207).

Images