A molding die

Abstract

The utility model discloses a kind of plastic forming mould, it belongs to forming mould field, it includes upper die and lower die, the upper die includes upper die sleeve board, the forming surface of the upper die sleeve board is equipped with upper installation groove, and upper die core is fixedly installed in the upper installation groove;The lower die includes lower die sleeve board, the forming surface of the lower die sleeve board is equipped with lower installation groove, and lower die core is fixedly installed in the lower installation groove;Lower core is also provided in the lower installation groove with the cooperation of lower die core, the back surface of the lower core is fixedly connected with lower die tension strip, and the lower die tension strip can be transversely slidably arranged in the sliding groove opened in lower die sleeve board.In order to provide a kind of plastic forming mould, can improve pressing quality.

Description

Technical Field

[0001] This utility model relates to the field of molding molds, specifically a plastic molding mold. Background Technology

[0002] In the food processing industry, materials are often filled into the cavity of a mold, and the product is pressed and shaped 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. Utility Model Content

[0003] The purpose of this invention is to address the above problems by providing a molding die that can improve the pressing quality.

[0004] To achieve the above objectives, the present invention adopts a molding die comprising an upper die and a lower die. The upper die includes an upper die plate with an upper mounting groove on its forming surface, in which an upper die core is fixedly installed. The lower die includes a lower die plate with a lower mounting groove on its forming surface, the lower mounting groove and the upper mounting groove being opposite to each other, in which a lower die core is fixedly installed. A lower core that mates with the lower die core is also provided in the lower mounting groove. The lower core and lower die core are arranged in groups, with only one group of lower core and lower die core provided in each lower mounting groove. The lower mounting grooves can be arranged in a rectangular array. A lower die pull rod is fixedly connected to the back of the lower core, and the lower die pull rod is laterally slidably disposed in a sliding groove opened within the lower die plate. For products with undercut or side-concave structures, this mold drives the lower core to move laterally before vertical mold opening, thus clearing away obstructions on the side of the product. This fundamentally prevents the product from being scratched, squeezed, or pulled during removal, effectively protecting the product's appearance integrity, greatly reducing the breakage rate, and improving the yield and pressing quality.

[0005] 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.

[0006] Furthermore, the upper mounting slot also contains an upper core that mates with the upper mold core. The upper core and upper mold core are arranged in groups, with only one group of upper cores and upper mold cores in each upper mounting slot. The upper mounting slots can be arranged in a rectangular array. An upper mold pull rod is fixedly connected to the back of the upper core, and the upper mold pull rod is laterally slidably positioned in a sliding groove within the upper mold sleeve. The bottom wall of the upper mounting slot has a communicating hole that connects to the sliding groove. By providing independent lateral core-pulling mechanisms in both the upper and lower molds, the system can handle spherical or arc-shaped products, or products where both the upper and lower parts have undercuts or side recesses. During mold opening, the upper and lower cores can be simultaneously or sequentially pulled out laterally to release the product from all directions of encapsulation, allowing products with complex external structures to be easily and undamagedly removed, thereby improving applicability.

[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. The sliding pair formed by the sliding blocks and guide grooves provides high-precision linear guidance for the lateral movement of the upper and lower mold cores, ensuring smooth and accurate core pulling and resetting actions. The sliding blocks are fixedly connected to the corresponding upper and lower mold pull bars. Therefore, the bottom walls of both the upper and lower mounting grooves are provided with communicating holes that connect to the sliding grooves. The size of the communicating holes is set to allow the sliding blocks to connect with and move between the upper and lower mold pull bars.

[0009] 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 and lower mold pull bars are respectively fixedly connected to a pull-out part. This facilitates the pulling of the upper and lower mold pull bars.

[0010] Furthermore, the sliding groove is open on its back side and at both ends along its length. The sliding groove provides precise guidance for the upper and lower pull bars. At the same time, the open structure at both ends ensures that the pull bar will not interfere with the groove wall during its sliding stroke.

[0011] Furthermore, the back sides of both the upper and lower mold sleeves are sealed by detachable base plates. The base plates effectively prevent external dust and impurities from entering the sliding groove and the cavity, while also providing great convenience for daily inspection, cleaning, and maintenance.

[0012] The beneficial effects of this invention are as follows: By using upper and lower mold pull rods to drive the upper and lower cores to perform a lateral core-pulling movement first, the mold can completely release the lateral undercuts or complex contours of the product before vertical mold opening. This mechanism fundamentally avoids the problems of product scratches, tears, or jamming caused by traditional vertical mold opening methods, thereby significantly reducing the product breakage rate, ensuring the integrity of the product shape, and improving the yield and pressing quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention in the mold-closed state.

[0014] Figure 2 This is a schematic diagram of the exploded structure of the mold.

[0015] Figure 3 This is a schematic diagram of the upper mold forming surface.

[0016] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0017] Figure 5 This is a schematic diagram of the lower mold cross-section structure.

[0018] Figure 6 This is a schematic diagram of the lower mold forming surface.

[0019] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0020] Figure 8 This is a schematic diagram of the three-dimensional structure of the cavity surface of the mold core and the die core.

[0021] Figure 9 This is a schematic diagram of the three-dimensional structure of the mold core and cavity from another perspective.

[0022] Figure 10 This is a schematic diagram of the three-dimensional structure of the back of the mold core and the mandrel.

[0023] Figure 11 This is a schematic diagram of the three-dimensional structure of the mold core and cavity back from another perspective.

[0024] The text labels in the figure 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; 2. Lower mold; 201. Lower mold sleeve plate; 202. Lower mold core; 203. Lower core; 204. Lower mold pull rod; 205. Lower mounting groove; 3. Cavity side; 4. Cavity bottom; 5. Guide groove; 6. Sliding block; 7. Pull-out part; 8. Seat plate. Detailed Implementation

[0025] 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.

[0026] Example 1, such as Figures 1 to 11As shown, this embodiment provides a molding die, including an upper die 1 and a lower die 2. The upper die 1 includes an upper die plate 101. The front side of the upper die plate 101 is machined with an upper mounting groove 105 for embedding and mounting an upper die 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 die core 102 and the upper mold core 103 in that direction under the pressed state, 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 die core 102 and the upper mold core 103 together constitute a complete upper die cavity. A transverse sliding groove is machined on the back side of the upper die plate 101 by milling or other methods. The upper die pull bar 104 and the sliding groove in the upper die plate 101 constitute a sliding pair. 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 by 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 to 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. At least one end of the upper mold pull strip 104 extends out of the upper mold sleeve plate 101, and the extended end of the upper mold pull strip 104 is fixedly connected to a pull-out part 7. The back of the upper mold sleeve plate 101 is closed by a detachable base plate 8, and the base plate 8 is fixedly connected to the upper mold sleeve plate 101 by bolts or other fasteners.

[0027] The lower mold 2 and the upper mold 1 are symmetrically structured and compatible. The lower mold 2 includes a lower mold sleeve 201, with a lower mounting groove 205 on the front for mounting the lower mold core 202 and the lower core 203. The dimension of the lower mounting groove 205 along the sliding direction of the lower core 203 is greater than the total dimension of the lower core 203 and the lower mold core 202 in that direction under the pressed state, thereby providing the necessary space for the sliding of the lower core 203. The cavity surfaces of the lower mold core 202 and the lower core 203 together form a complete lower mold cavity. After mold closing, the lower mold cavity and the upper mold cavity combine to form a complete cavity. The back of the lower mold sleeve 201 also has a sliding groove, and the lower mold pull strip 204 and the sliding groove in the lower mold sleeve 201 form a sliding pair. The lower mold pull bar 204 also has an extended end with a pull-out portion 7. In this embodiment, both ends of the upper mold pull bar 104 extend out of the upper mold sleeve plate 101, and all the extended ends on the same side are fixedly connected to a first pull-out portion. Correspondingly, both ends of the lower mold pull bar 204 extend out of the lower mold sleeve plate 201, and all the extended ends on the same side are fixedly connected to a second pull-out portion. The back of the lower mold sleeve plate 201 is closed by another seat plate 8. 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 space for the sliding block 6 to slide, the back of the lower mounting groove 205 is connected to the sliding groove through a connecting hole. 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.

[0028] 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. 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.

[0029] 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. 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.

[0030] 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, while 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 to vertically press the material in the cavity. After the mold is closed, the upper mold core 102, upper mold core 103, lower mold core 202, and lower mold core 203 form a molding cavity. At the same time, the external drive device pulls the upper mold pull bar 104 and the lower mold pull bar 204 laterally through the pull-out part 7. During this process, the upper mold core 103 and the lower mold core 203 move toward the corresponding mold core cavity side 3, thereby applying lateral pressure to the material to complete the vertical and lateral composite pressing of the material in the cavity.

[0031] After pressing, the upper and lower mold strips are driven to slide laterally in opposite directions by external driving devices such as hydraulic cylinders, which in turn drive the upper and lower cores to move laterally along the direction parallel to the bottom surface 4 of their respective cavities, thus first removing the lateral covering of the product; then, the driving device drives the upper mold 1 to rise vertically, realizing the final separation of the upper and lower molds.

[0032] After the upper and lower molds are separated, the molded product is taken out from the opened mold.

[0033] 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.

[0034] 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 molding die, comprising an upper die (1) and a lower die (2), wherein the upper die (1) comprises an upper die plate (101), the upper die plate (101) having an upper mounting groove (105) on its molding surface, and an upper die core (102) fixedly mounted in the upper mounting groove (105); the lower die (2) comprises a lower die plate (201), the lower die plate (201) having a lower mounting groove (205) on its molding surface, and a lower die core (202) fixedly mounted in the lower mounting groove (205); characterized in that, The lower mounting groove (205) is also provided with a lower core (203) that cooperates with the lower mold core (202). The back of the lower core (203) is fixedly connected with a lower mold pull strip (204). The lower mold pull strip (204) is slidably disposed in a sliding groove opened in the lower mold sleeve plate (201).

2. The molding 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 molding die according to claim 2, characterized in that, The upper mounting groove (105) is also provided with an upper core (103) that cooperates with the upper mold core (102). The back of the upper core (103) is fixedly connected with an upper mold pull strip (104). The upper mold pull strip (104) is slidably disposed in a sliding groove opened in the upper mold sleeve plate (101).

4. A molding die according to claim 3, 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).

5. A molding die according to claim 4, 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) form a sliding pair. The sliding blocks (6) are fixedly connected to the corresponding upper mold pull strips (104) and lower mold pull strips (204). The bottom walls of the upper mounting groove (105) and the lower mounting groove (205) are provided with connecting holes that communicate with the sliding grooves. The size of the connecting holes is set to allow the sliding blocks (6) to connect with the upper and lower mold pull strips and move.

6. A molding die according to claim 3, 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 with a pull-out part (7).

7. A molding die according to claim 3, characterized in that, The sliding groove is open on its back side and at both ends along its length.

8. A molding die according to claim 7, characterized in that, The back sides of both the upper mold plate (101) and the lower mold plate (201) are sealed by a detachable base plate (8).

Images