Injection mold for a cup

Abstract

The utility model discloses a kind of injection mould of cup body, it is related to injection mould technical field, including upper die and lower die, the upper die and lower die mutually butt joint form the cavity for forming product;The parting surface of lower die is integrally formed with the protruding mold core, and the parting surface of lower die is also embedded with first forming insert, the inside of the first forming insert is formed with the first product profiling portion surrounding the lower end outer periphery of mold core, the parting surface of upper die is embedded with second forming insert, the inside of the second forming insert is formed with the second product profiling portion surrounding the outer periphery close to lower end of mold core;Row position structure is arranged between the upper die and lower die, and the row position structure includes shovel base fixedly connected to upper die, row position seat slidably embedded in lower die, and third forming insert slidably butted to cavity;Prolong service life of mould, guarantee cup body production quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for a cup body. Background Technology

[0002] In the field of injection molding of cup-type products, the structural design of the mold must be precisely matched to the shape characteristics of the cup. Due to functional requirements, cup products often have different molding differences in different parts such as the bottom, side walls, and top. For example, the bottom needs to form a stable and supportive flat structure or special texture, the side walls may be designed with functional features such as protrusions and depressions, and the top needs to be adapted to the sealing contour of the cup lid. These differences in molding requirements for different parts place extremely high demands on the molding precision of the core components of the mold.

[0003] Specifically, the cup body is formed by the mating cavity formed by the upper and lower mold cores. To meet the shaping requirements of different parts, the upper and lower mold cores need to achieve precise shaping of their respective areas. That is, the forming degree of each mold core needs to reach a high standard: the lower mold core needs to accurately shape the outline of the top and upper half of the side wall of the cup body, while the upper mold core needs to accurately match the shape of the bottom and lower half of the side wall of the cup body, or the upper mold core needs to achieve precise shaping according to the shaping requirements of the corresponding area of ​​the cup body. If the forming degree of either one is insufficient, such as deviation in outline size or substandard surface finish, it will directly lead to the overall shape of the cup body being unqualified and unable to meet the subsequent assembly or use requirements.

[0004] More importantly, when the cup body has lateral features such as protrusions or snap-fits on its sidewalls, the mold needs to be equipped with an additional sliding structure to complete the lateral core-pulling action. The sliding structure needs to be precisely matched with the forming cavities of the upper and lower mold cores. After injection molding, it needs to detach from the lateral features of the cup body through a specific driving method to achieve the opening and demolding of the upper and lower mold cores. However, in the existing technology, since the upper and lower mold cores themselves already need to meet high formability requirements, the addition of the sliding structure further increases the difficulty of matching: the docking accuracy between the sliding structure and the forming cavities of the upper and lower mold cores is difficult to control. If there is a deviation between the core-pulling path and forming contour of the sliding structure and the forming area of ​​the upper and lower mold cores, it is very easy to cause incomplete forming of the lateral features of the cup body, or damage to the sidewalls of the cup body during the core-pulling process. At the same time, the movement rhythm of the sliding structure needs to be precisely synchronized with the opening and closing actions of the upper and lower mold cores. Once the matching sequence is deviated, it will not only affect the production efficiency, but may also cause collision damage to the mold components, further aggravating the production risks.

[0005] Therefore, given the different molding requirements of different parts of the cup body and the need for high molding density of the upper and lower mold cores, how to achieve precise core pulling fit between the slide and the mold core has become a core issue that urgently needs to be addressed in the current cup body injection mold design. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] An injection mold for a cup body includes an upper mold core and a lower mold core, which are joined together to form a mold cavity for molding the product; The lower mold core has an integrally formed protruding mold core on its parting surface, and a first molding insert is also embedded on the parting surface of the lower mold core. A first product contouring part is formed on the inner side of the first molding insert and surrounds the lower outer periphery of the mold core. A second molding insert is embedded on the parting surface of the upper mold core, and a second product contouring part is formed on the inner side of the second molding insert and surrounds the lower outer periphery of the mold core. A sliding structure is provided between the upper mold core and the lower mold core. The sliding structure includes a shovel base fixedly connected to the upper mold core, a sliding seat that can be slidably fitted into the lower mold core, and a third molding insert that can be slidably connected to the mold cavity. The end of the third molding insert that is connected to the mold cavity is provided with a third product contouring part. The shovel base drives the sliding seat and drives the third molding insert to perform a lateral core-pulling movement on the parting surface of the lower mold. The first molding insert has a groove at its edge that is adapted to the slide seat, together with the lower mold core. The inner wall of the groove has a through groove adapted to the contour part of the third product.

[0008] As a further embodiment of this utility model: a first molding space and a second molding space are formed between the first product contouring part, the second product contouring part and the outer periphery of the mold core, respectively, wherein the third product contouring part corresponds to and cooperates with the first molding space.

[0009] As a further embodiment of this utility model: a first mounting groove adapted to the first molding insert is provided on the parting surface of the lower mold core, and the first molding insert is fixedly connected to the first mounting groove by a locking member; The first molded insert has protruding connecting ends on both sides of its groove, and the connecting ends are provided with connecting structures that cooperate with the locking member.

[0010] As a further embodiment of this utility model: a groove is provided on the side of the slide seat near the mold cavity, and an elastic element is provided in the groove. One end of the elastic element abuts against the inner wall of the groove, and the other end of the elastic element abuts against the inner wall of the first molding insert located in its slide groove, or the lower mold core located in its slide groove.

[0011] As a further embodiment of this utility model: the top of the upper mold core is provided with a glue injection system, and the top of the mold core is connected and cooperated with the glue injection system.

[0012] As a further embodiment of this utility model: a first inclined portion is provided on the side of the row seat away from the mold cavity, and a second inclined portion is provided at the lower end of the shovel base to cooperate with the first inclined portion.

[0013] As a further embodiment of this utility model: a second mounting groove adapted to the second molding insert is provided on the parting surface of the upper mold core, and the second molding insert is fixedly connected to the second mounting groove by a locking member.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention integrates the mold core and lower mold platen, with a first molding insert on the lower mold platen assisting in the molding of the top side wall of the cup body, and a second molding insert on the upper mold platen molding the structure of the cup body near the top side wall, or cooperating with the first molding insert to mold the overall contour of the top side wall. This effectively distributes the molding pressure of the lower mold platen and improves the molding accuracy of the top area of ​​the cup body. At the same time, the slide groove jointly formed by the first molding insert and the lower mold platen provides a stable sliding guide for the slide seat. The through groove in the inner wall of the slide groove ensures that the third molding insert accurately aligns with the mold cavity. The shovel base and the slide seat achieve smooth driving through the inclined part, and the elastic element in the slide seat assists in its stable reset. The overall structure not only ensures the smoothness and accuracy of the core pulling action of the slide structure, but also improves the stability of the cooperation of various mold components, reduces cup body molding defects, extends the service life of the mold, and ensures the production quality and efficiency of the cup body.

[0015] 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

[0016] 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.

[0017] Figure 1 This is a cross-sectional structural schematic diagram from one perspective of this utility model; Figure 2 yes Figure 1 A cross-sectional structural diagram from a further perspective; Figure 3 This is a cross-sectional structural schematic diagram from another perspective of this utility model; Figure 4 This is a schematic diagram of the cup's structure.

[0018] The reference numerals and names in the figure are as follows: 1. Upper mold core; 2. Lower mold core; 3. Mold cavity; 4. Mold core; 5. First molding insert; 6. First product contouring part; 7. Second molding insert; 8. Second product contouring part; 9. Shovel base; 10. Slide seat; 11. Third molding insert; 12. Third product contouring part; 13. Slide groove; 14. Through groove; 15. First molding space; 16. Second molding space; 17. First mounting groove; 18. Connecting end; 19. Abutment groove; 20. Elastic element; 21. Glue injection system; 22. First inclined part; 23. Second inclined part; 24. Second mounting groove. 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 1-4 In this embodiment of the utility model, the injection mold for a cup body has the following specific structure: The mold includes an upper mold core 1 and a lower mold core 2. The upper mold core 1 and the lower mold core 2 can be connected to each other, and after they are connected, they together enclose the mold cavity 3 for molding cup products.

[0021] On the parting surface of the lower mold core 2 facing the upper mold core 1, an upwardly protruding mold core 4 is integrally formed. The shape of the mold core 4 is adapted to the shape of the internal cavity of the cup body. At the same time, a first molding insert 5 is also embedded on the parting surface of the lower mold core 2. A first product contouring part 6 is formed on the inner side of the first molding insert 5. The first product contouring part 6 is arranged around the outer periphery of the lower end of the mold core 4 to assist the lower mold core 2 in forming part of the structure of the top side wall of the cup body, and to share the molding pressure / molding difficulty of the lower mold core 2 in the top side wall area of ​​the cup body. On the parting surface of the upper mold core 1 facing the lower mold core 2, a second molding insert 7 is embedded. A second product contouring part 8 is formed on the inner side of the second molding insert 7. The second product contouring part 8 is arranged around the outer periphery of the mold core 4 near the lower end to form the structure of the cup body near the top side wall, or to cooperate with the first product contouring part 6 to form the overall outline of the top side wall of the cup body (such as the flange, steps, etc. of the outer periphery of the top of the cup body). The first product contouring part 6 and the outer periphery of the mold core 4 form a first molding space 15, and the second product contouring part 8 and the outer periphery of the mold core 4 form a second molding space 16. These two molding spaces together constitute the molding part of the corresponding cup top side wall area in the mold cavity 3, and respectively undertake the molding function of different sections or different features.

[0022] To achieve the forming and demolding of the lateral features of the cup's top sidewall, a sliding structure is provided between the upper mold core 1 and the lower mold core 2. This sliding structure includes a shovel base 9, a sliding seat 10, and a third forming insert 11. The shovel base 9 is fixedly connected to the upper mold core 1 and moves with it. The sliding seat 10 is slidably fitted onto the lower mold core 2 and can slide laterally on the parting surface of the lower mold core 2. The third forming insert 11 is used to engage with the mold cavity 3, and its end engaging with the mold cavity 3 has a third product contouring part 12. This third product contouring part 12 corresponds to and cooperates with the first forming space 15 to form the lateral features of the cup's top sidewall. During mold closing or opening, the shovel base 9 drives the sliding seat 10, which in turn drives the third forming insert 11 to perform a lateral core-pulling movement on the parting surface of the lower mold core 2, completing the forming and demolding of the cup's lateral features.

[0023] Specifically, the edge of the first molding insert 5 and the lower mold core 2 are provided with a sliding groove 13. The slide seat 10 is adapted to be installed in the sliding groove 13, and the sliding groove 13 provides guidance for the sliding of the slide seat 10. The inner wall of the sliding groove 13 is also provided with a through groove 14. The third product contouring part 12 is adapted to be installed in the through groove 14. When the slide seat 10 drives the third molding insert 11 to slide, the third product contouring part 12 can enter and exit the mold cavity 3 along the through groove 14 to achieve docking or disengagement with the mold cavity 3.

[0024] A first mounting groove 17 is formed on the parting surface of the lower mold core 2. The shape of the first mounting groove 17 is adapted to the first molding insert 5. The first molding insert 5 is installed in the first mounting groove 17 and fixedly connected to the lower mold core 2 by a locking member. The first molding insert 5 has protruding connecting ends 18 on both sides of its slide groove 13. The connecting ends 18 are provided with connecting structures. The connecting structures cooperate with the locking members to ensure that the first molding insert 5 is securely installed. If the locking member is a fixing bolt and the connecting structure is a through hole, the lower mold core 2 has a matching threaded hole. The lower end of the fixing bolt passes through the through hole and is screwed into the threaded hole, thereby realizing the fixed connection between the first molding insert 5 and the lower mold core 2. A second mounting groove 24 is correspondingly formed on the parting surface of the upper mold core 1. The second mounting groove 24 is adapted to the second molding insert 7. The second molding insert 7 is also fixedly connected to the second mounting groove 24 by a locking member to ensure its positional stability during the molding process.

[0025] A groove 19 is provided on the side of the slide seat 10 near the mold cavity 3. An elastic element 20 is provided in the groove 19. One end of the elastic element 20 abuts against the inner wall of the groove 19, and the other end abuts against the inner wall of the first molding insert 5 located in its slide groove 13 or the inner wall of the lower mold core 2 located in its slide groove 13. During the movement of the slide seat 10 driven by the shovel base 9, the elastic element 20 can apply a reverse force to the slide seat 10 through its own deformation, assisting the slide seat 10 in resetting or buffering the impact force during the movement.

[0026] The slide seat 10 has a first inclined portion 22 on the side away from the mold cavity 3, and a second inclined portion 23 is provided at the lower end of the shovel base 9. The first inclined portion 22 and the second inclined portion 23 cooperate with each other. When the mold is closed, the upper mold core 1 drives the shovel base 9 to move downward. The second inclined portion 23 contacts the first inclined portion 22 and generates a lateral thrust, driving the slide seat 10 to slide towards the mold cavity 3, so that the third molding insert 11 aligns with the mold cavity 3. When the mold is opened, the upper mold core 1 drives the shovel base 9 to move upward. The second inclined portion 23 separates from the first inclined portion 22. Under the action of the elastic element 20, the slide seat 10 slides away from the mold cavity 3, completing the core pulling action.

[0027] In addition, the top of the upper mold core 1 is provided with a glue injection system 21, and the top of the mold core 4 is connected to the glue injection system 21, so that the molten raw material can enter the molding space formed by the mold core 4 and each product contour part through the glue injection system 21, and finally be formed into a cup product.

[0028] In summary, this utility model integrates the mold core 4 and the lower mold core 2, with the first molding insert 5 on the lower mold core 2 assisting in the molding of the top side wall of the cup, and the second molding insert 7 on the upper mold core 1 molding the structure of the cup near the top side wall, or cooperating with the first molding insert 5 to form the overall contour of the top side wall. This effectively distributes the molding pressure of the lower mold core 2 and improves the molding accuracy of the top area of ​​the cup. At the same time, the slide groove 13 jointly formed by the first molding insert 5 and the lower mold core 2 provides a stable sliding guide for the slide seat 10. The through groove 14 on the inner wall of the slide groove 13 ensures that the third molding insert 11 accurately connects to the mold cavity 3. The shovel base 9 and the slide seat 10 achieve smooth driving through the inclined part cooperation. The elastic element 20 in the slide seat 10 assists in its stable reset. The overall structure not only ensures the smoothness and accuracy of the core pulling action of the slide structure, but also improves the cooperation stability of each component of the mold, reduces cup molding defects, extends the service life of the mold, and ensures the production quality and efficiency of the cup.

[0029] 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 exemplary 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.

Claims

1. An injection mold for a cup body, characterized in that, It includes an upper mold core and a lower mold core, which are joined together to form a mold cavity for molding products; The lower mold core has an integrally formed protruding mold core on its parting surface, and a first molding insert is also embedded on the parting surface of the lower mold core. A first product contouring part is formed on the inner side of the first molding insert and surrounds the lower outer periphery of the mold core. A second molding insert is embedded on the parting surface of the upper mold core, and a second product contouring part is formed on the inner side of the second molding insert and surrounds the lower outer periphery of the mold core. A sliding structure is provided between the upper mold core and the lower mold core. The sliding structure includes a shovel base fixedly connected to the upper mold core, a sliding seat that can be slidably fitted into the lower mold core, and a third molding insert that can be slidably connected to the mold cavity. The end of the third molding insert that is connected to the mold cavity is provided with a third product contouring part. The shovel base drives the sliding seat and drives the third molding insert to perform a lateral core-pulling movement on the parting surface of the lower mold. The first molding insert has a groove at its edge that is adapted to the slide seat, together with the lower mold core. The inner wall of the groove has a through groove adapted to the contour part of the third product.

2. The injection mold for a cup body according to claim 1, characterized in that, The first product contouring part, the second product contouring part and the outer periphery of the mold core respectively form a first molding space and a second molding space, wherein the third product contouring part corresponds to and cooperates with the first molding space.

3. The injection mold for a cup body according to claim 1, characterized in that, The lower mold core has a first mounting groove adapted to the first molding insert on its parting surface, and the first molding insert is fixedly connected to the first mounting groove by a locking member; The first molded insert has protruding connecting ends on both sides of its groove, and the connecting ends are provided with connecting structures that cooperate with the locking member.

4. The injection mold for a cup body according to claim 1, characterized in that, The slide seat has a groove on the side near the mold cavity. An elastic element is provided in the groove. One end of the elastic element abuts against the inner wall of the groove, and the other end of the elastic element abuts against the inner wall of the first molding insert or the lower mold core located in the groove.

5. The injection mold for a cup body according to claim 1, characterized in that, The top of the upper mold core is provided with a glue injection system, and the top of the mold core is connected to the glue injection system.

6. The injection mold for a cup body according to claim 1, characterized in that, The side of the row seat away from the mold cavity is provided with a first inclined part, and the lower end of the shovel base is provided with a second inclined part that cooperates with the first inclined part.

7. The injection mold for a cup body according to claim 1, characterized in that, The upper mold core has a second mounting groove adapted to the second molding insert on its parting surface, and the second molding insert is fixedly connected to the second mounting groove by a locking member.

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