Injection mold with quick demolding function

Abstract

The utility model belongs to injection mold field provides a kind of injection mold with quick demoulding function, it includes: fixed mould base;Movable mould base, it is movably set in the lower of fixed mould base, and when fixed mould base and movable mould base adhere, product cavity is formed between fixed mould base and movable mould base;Demoulding assembly is set in movable mould base, demoulding assembly includes forming block and demolding block, forming block is located in demolding block, and it is through demolding block and moves to product cavity inside in activity. Compared with prior art, the utility model has the advantages that through the cooperation of forming block and demolding block in demoulding assembly, not only the accurate forming of the internal groove of the plugging head is realized, but also the forming block is moved horizontally by the guide block during the demolding process, so that the formed plugging head can be smoothly demolded from the mold, solving the problem of difficult demolding with ejector rod in traditional mold, reducing the manufacturing cost, and effectively ensuring the smoothness during demolding and the stability of product quality after demolding.

Description

Technical Field

[0001] This utility model belongs to the field of injection molds, and specifically relates to an injection mold with a quick demolding function. Background Technology

[0002] In the modern food packaging industry, the sealing head, as an important component of the cup lid, typically consists of two parts: a handle and a sealing part. The handle is used by the user to open or close the sealing structure, while the sealing part is responsible for achieving a tight seal with the cup body. To enhance the stability of the connection between the sealing head and the cup opening, the outer wall of the sealing part usually has at least one snap-fit ​​strip for engaging with the limiting structure inside the cup body. Simultaneously, the sealing part also features a groove structure to accommodate a sealing ring or form an auxiliary sealing surface, thereby further improving the overall sealing performance.

[0003] While the aforementioned structure offers significant functional advantages, it presents numerous challenges in the injection molding process. Particularly during demolding, the presence of grooves and retaining strips creates substantial clamping force and demolding resistance between the sealing head and the mold cavity, leading to demolding difficulties. Existing injection molds often employ a large number of ejector pins for demolding. This structure increases the overall mold manufacturing cost and, due to the small size of the product, easily causes severe burrs or even damage to the sealing head during demolding, significantly affecting the smoothness and stability of demolding and failing to guarantee that the product quality meets the required usage specifications. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing an injection mold with a simple structure, suitable for rapid and stable demolding of small products, and ensuring product quality, which has a rapid demolding function.

[0005] The objective of this utility model can be achieved by addressing the following technical problem: a quick-release injection mold is provided for molding a sealing head on a beverage cup lid. The sealing head has a handle portion and a sealing portion connected to each other. A snap-fit ​​strip is formed on the outer wall of the sealing portion, and a groove is formed within the sealing portion. The mold includes:

[0006] Mold base;

[0007] A movable mold base is movably disposed below the fixed mold base, and when the fixed mold base and the movable mold base are in contact, a product cavity is formed between the fixed mold base and the movable mold base;

[0008] A demolding assembly is disposed within the moving mold base. The demolding assembly includes a forming block and a demolding module. The forming block is disposed within the demolding module and extends through the demolding module and movably into the product cavity to form the groove. The demolding module is movably disposed within the moving mold base and is used to drive the forming block and the formed sealing head away from the moving mold base in a vertical direction.

[0009] A guide block is disposed within the moving mold base. The guide block is movably engaged with the molding block and is used to guide the molding block to move relative to the demolding module.

[0010] When the demolding component moves the demolding module toward the fixed mold base, the formed sealing head causes the buckle strip to disengage from the product cavity. As the forming block moves relative to the demolding module in a direction perpendicular to the mold opening direction, the sealing head presses against the side wall of the demolding module and disengages from the forming block.

[0011] In the above-mentioned injection mold with a quick demolding function, the molding block is connected to a contouring part, the demolding block is provided with a guide hole, and the contouring part passes through the guide hole and is movably inserted into the product cavity.

[0012] In the above-mentioned injection mold with a quick demolding function, a semi-sealed limiting groove is provided in the demolding module. One end of the semi-sealed limiting groove opens towards the fixed mold base, and the other end opens away from the product cavity. The molding block is movably disposed in the semi-sealed limiting groove.

[0013] In the above-mentioned injection mold with a quick demolding function, a guide block is installed on the bottom wall of the semi-sealed limiting groove, a locking block is formed on the guide block, and a locking groove is formed on the bottom wall of the molding block, and the locking block is movably locked in the locking groove.

[0014] In the above-mentioned injection mold with a quick demolding function, an inclined block is formed on the guide block, and an inclined groove is opened in the molding block, and the inclined block is movably engaged with the inclined groove.

[0015] In the above-mentioned injection mold with a quick demolding function, the side wall of the guide block is provided with a mounting hole, and the moving mold base is provided with an assembly hole. When the mounting hole and the assembly hole are aligned, they can be connected by fasteners.

[0016] In the above-mentioned injection mold with a quick demolding function, the demolding module is also provided with a clearance groove located on and connected to the bottom wall of the semi-sealed limiting groove, and the guide block extends movably into the clearance groove.

[0017] In the aforementioned injection mold with a rapid demolding function, the demolding assembly further includes a push plate and a push rod. A fixed plate is connected to the push plate, and the top end of the push rod is connected to the demolding assembly, while the bottom end is connected to the fixed plate.

[0018] In the above-mentioned injection mold with a quick demolding function, the bottom wall of the semi-sealed limiting groove is also provided with a positioning groove, and a positioning hole is provided in the positioning groove. The guide block extends into the positioning groove and is connected to the positioning hole.

[0019] In the aforementioned injection mold with a rapid demolding function, a guide post is provided on the fixed mold base, and a guide hole is provided in the moving mold base, with the guide post being movably inserted into the guide hole.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention provides an injection mold with a quick demolding function. Through the cooperation of the molding block and the demolding module in the demolding component, it not only achieves the precise molding of the groove inside the sealing head, but also drives the molding block to move laterally during the demolding process through the guide block, so that the molded sealing head can be smoothly demolded from the mold. This solves the problem of difficult demolding using ejector pins in traditional molds, reduces manufacturing costs, and effectively ensures the smoothness of demolding and the stability of product quality after demolding.

[0022] (2) The semi-sealed limiting groove provides a stable installation space for the molding block and limits the movement range of the molding block to prevent it from being misaligned or falling off during demolding. This improves the stability of the overall mold structure and the controllability of the demolding process, which is conducive to improving production efficiency and product consistency.

[0023] (3) The matching structure of the guide post and the guide hole ensures the precise alignment of the moving mold base and the fixed mold base during the mold closing and opening process, avoids product defects or mold damage caused by misalignment, and improves the service life and molding quality of the mold. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the sealing head structure;

[0025] Figure 2 This is a schematic diagram of the moving mold base;

[0026] Figure 3 This is a schematic diagram of the fixed mold base;

[0027] Figure 4 This is an exploded view of the detachable module, the forming block, and the moving mold base;

[0028] Figure 5This is an exploded view of the area between the detached module and the formed block;

[0029] Figure 6 yes Figure 1 A schematic diagram of the cross-section at point AA.

[0030] In the diagram, 1 is the sealing head; 10 is the handle; 11 is the sealing part; 110 is the snap-fit ​​strip; and 111 is the groove.

[0031] 2. Fixed mold base; 20. Guide pillar; 21. Fixed mold cavity;

[0032] 3. Moving mold base; 30. Assembly hole; 31. Guide hole; 32. Moving mold cavity;

[0033] 4. Demolding assembly; 40. Molding block; 400. Contouring part; 401. Engaging groove; 402. Inclined groove; 41. Demolding module; 410. Guide hole; 411. Semi-sealed limiting groove; 412. Clearance groove; 413. Positioning groove; 42. Guide block; 420. Engaging block; 43. Push plate; 44. Push rod; 45. Fixing plate; 5. Guide block; 50. Inclined block; 51. Mounting hole. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] like Figures 1 to 6 As shown, this utility model discloses an injection mold with a quick demolding function, used to mold a sealing head 1 on a beverage cup lid. The sealing head 1 has a handle part 10 and a sealing part 11 connected to each other. The outer wall of the sealing part 11 is formed with a snap strip 110, and a groove 111 is provided in the sealing part 11. The injection mold includes a fixed mold base 2, a moving mold base 3, a demolding component 4, and a guide block 5.

[0037] Specifically, the moving mold base 3 is movably disposed below the fixed mold base 2, and when the fixed mold base 2 and the moving mold base 3 are fitted together, a product cavity is formed between the fixed mold base 2 and the moving mold base 3; the demolding assembly 4 is disposed inside the moving mold base 3, and the demolding assembly 4 includes a molding block 40 and a demolding module 41. The molding block 40 is disposed inside the demolding module 41, and passes through the demolding module 41 and extends movably into the product cavity to form the groove 111; the demolding module 41 is movably disposed inside the moving mold base 3 and is used to drive the molding block 40 and the molded seal. The plug 1 moves vertically away from the moving mold base 3; the guide block 5 is located inside the moving mold base 3 and is movably engaged with the molding block 40 to guide the molding block 40 to move relative to the demolding module 41; when the demolding assembly 4 drives the demolding module 41 to move towards the fixed mold base 2, the molded plug 1 drives the buckle strip 110 to disengage from the product cavity, and due to the movement of the molding block 40 relative to the demolding module 41 in a direction perpendicular to the mold opening direction, the plug 1 abuts against the side wall of the demolding module 41 and disengages from the molding block 40.

[0038] like Figure 1 As shown, the sealing head 1 is used as a sealing head 1 on the lid of a beverage cup such as coffee or milk tea. Utilizing the cooperation of the sealing part 11 and the snap-fit ​​strip 110 on the sealing head 1, it ensures that liquid will not leak out from the drinking spout. Specifically, during the mold closing stage, the fixed mold base 2 and the moving mold base 3 of the mold close, forming a product cavity for molding the sealing head 1, such as... Figures 2 to 4 As shown, this embodiment mainly relies on the fit between the moving mold cavity 32 in the moving mold base 3 and the fixed mold cavity 21 in the fixed mold base 2 to form the above-mentioned product cavity. As the injection molding operation is completed and the moving mold base 3 moves away from the fixed mold base 2 (i.e., mold opening operation), the molded sealing head 1 remains in the moving mold cavity 32. As the demolding component 4 pushes the demolding module 41 along... Figure 4 The mold block 40 is lifted upwards to move away from the moving mold base 3. Since the molding block 40 extends into the molded sealing head 1 (i.e., into the groove 111) during the molding process, the molded sealing head 1 can be moved away from the moving mold cavity 32 under the drive of the release module 41 (i.e., the snap-fit ​​strip 110 is released). During this process, because the guide block 5 is movably engaged with the molding block 40, the molding block 40 moves along the release module 41... Figure 4During the vertical upward movement, the forming block 40 is forced to move laterally in the horizontal direction (i.e., perpendicular to the mold opening direction) under the action of the guide block 5. At this time, the forming block 40 is laterally withdrawn from the groove 111 of the sealing head 1, and at the same time, it drives the sealing head 1 as a whole to move towards the demolding module 41. Finally, the sealing head 1 presses against the side wall of the demolding module 41 due to the lateral movement, forming a certain resistance, thereby generating relative sliding between it and the forming block 40 and finally separating, realizing the complete demolding of the sealing head 1. It can be seen that this structure, through the combination of the forming block 40 and the demolding module 41, not only achieves the precise forming of the groove 111, but also realizes the lateral demolding of the groove 111 structure through the linkage of the guide block 5 and the forming block 40. This avoids the complex core-pulling mechanism used in traditional molds when demolding this small sealing head 1, reduces the mold manufacturing cost, and ensures the smoothness of demolding and the stability of product quality after demolding.

[0039] A contouring part 400 is connected to the molding block 40, and a guide hole 410 is provided in the demolding module 41. The contouring part 400 passes through the guide hole 410 and is movably inserted into the product cavity.

[0040] like Figure 5 As shown, in this embodiment, the contouring part 400 can be integrally formed with the molding block 40, or it can be connected to it using a detachable installation method (screws, bolt connections) to facilitate timely disassembly and replacement of the contouring part 400 when wear or damage occurs. Furthermore, the mating structure of the contouring part 400 and the guide hole 410 in this embodiment ensures good guidance and stability for the molding block 40 as it moves within the demolding module 41. This ensures precise movement of the molding block 40 during demolding, guaranteeing accurate molding of the groove 111 on the sealing head 1 while preventing offset or jamming, thereby improving demolding reliability and molding accuracy, and extending the mold's service life.

[0041] The mold 41 has a semi-sealed limiting groove 411. One end of the semi-sealed limiting groove 411 opens towards the fixed mold base 2, and the other end opens away from the product cavity. The molding block 40 is movably disposed in the semi-sealed limiting groove 411.

[0042] like Figure 4 and Figure 5 As shown, in this embodiment, the top opening of the semi-sealed limiting groove 411 faces the fixed mold base 2, which facilitates the quick installation and disassembly of the molding block 40 and the demolding module 41 by the workers. Therefore, the semi-sealed limiting groove 411 provides a stable installation space for the molding block 40 and limits the movement range of the molding block 40 to prevent it from being misaligned or falling off during demolding. This improves the stability of the overall mold structure and the controllability of the demolding process, which is conducive to improving production efficiency and product consistency.

[0043] A guide block 42 is installed on the bottom wall of the semi-sealed limiting groove 411. A locking block 420 is formed on the guide block 42. A locking groove 401 is formed on the bottom wall of the forming block 40. The locking block 420 is movably locked in the locking groove 401.

[0044] like Figure 4 and Figure 5 As shown, in this embodiment, the length direction of the guide block 42 faces the side opening of the semi-sealed limiting groove 411. As the disengaged module 41 moves along... Figure 4 Moving upwards, the guide block 5, located in the moving mold base 3, interacts with the forming block 40, pushing the forming block 40 to move horizontally (i.e., perpendicular to the mold opening direction). At this time, the bottom wall engaging groove 401 of the forming block 40 and the engaging block 420 on the guide block 42 form a sliding fit. The engaging block 420 slides in the engaging groove 401, providing a stable guiding path for the forming block 40, preventing it from deviating, jamming, or jumping during movement, ensuring that the forming block 40 can move accurately along the set trajectory during demolding, avoiding movement deviation, and improving demolding accuracy and mold operation stability.

[0045] The bottom wall of the semi-sealed limiting groove 411 is also provided with a positioning groove 413, and a positioning hole is provided in the positioning groove 413. The guide block 42 extends into the positioning groove 413 and is connected to the positioning hole.

[0046] Furthermore, such as Figure 5 As shown, in this embodiment, the structure of the positioning groove 413 and the positioning hole provides precise installation positioning for the guide block 42, ensuring the fitting accuracy between the guide block 42 and the forming block 40, and ensuring the consistency of the position of the groove 111 on the sealing head 1 after forming. This greatly ensures the quality and consistency of the product. In addition, the positioning hole is preferably a threaded hole, and the guide block 42 is fastened in the positioning groove 413 by screws or other structures, which ensures the smoothness and stability of the entire product demolding.

[0047] An inclined block 50 is formed on the guide block 5, and an inclined groove 402 is provided in the forming block 40. The inclined block 50 and the inclined groove 402 are movably engaged.

[0048] like Figure 4 or Figure 5 As shown, in this embodiment, the tilting direction of both the tilting block 50 and the tilting groove 402 is directed towards the outside of the detachment module 41, so that the detachment module 41 is positioned along... Figure 4When lifted upwards, the forming block 40 can move horizontally relative to the demolding module 41 (i.e., move outwards toward the moving mold base 3) by relying on the cooperation structure of the inclined block 50 and the inclined groove 402. In other words, the vertical movement of the demolding module 41 is converted into the horizontal movement of the forming block 40 by using the inclined plane, so as to realize the automatic lateral detachment of the forming block 40 during the demolding process. The structure is simple and reliable, and the response speed is fast, which helps to achieve efficient and stable demolding.

[0049] The side wall of the guide block 5 has a mounting hole 51, and the moving mold base 3 has an assembly hole 30. When the mounting hole 51 and the assembly hole 30 are aligned, they can be connected by fasteners.

[0050] like Figure 4 As shown, in this embodiment, the alignment of the mounting hole 51 with the assembly hole 30 and the connection using fasteners make the installation of the guide block 5 within the moving mold base 3 more secure and reliable, facilitating disassembly and maintenance, improving the maintainability and assembly accuracy of the mold, and reducing subsequent maintenance costs. It should be noted that the fasteners can be replaced by screws, bolts, or other connecting components.

[0051] The detachment module 41 is also provided with a clearance groove 412 located on the bottom wall of the semi-sealed limiting groove 411 and connected thereto, and the guide block 5 extends into the clearance groove 412.

[0052] like Figure 5 As shown, the clearance groove 412 in this embodiment provides sufficient space for the movement of the demolding module 41 relative to the guide block 5, while also ensuring smooth movement of the molding block 40 during demolding, avoiding structural interference, improving the coordination and reliability of the demolding action, and enhancing the compactness and functionality of the mold structure. Therefore, the clearance groove 412 in this embodiment is preferably inclined.

[0053] The demolding assembly 4 also includes a push plate 43 and a push rod 44. A fixing plate 45 is connected to the push plate 43, and the top end of the push rod 44 is connected to the demolding module 41, while the bottom end is connected to the fixing plate 45. Figure 6 As shown, the installation and configuration of the push plate 43, fixing plate 45, and push rod 44 in this embodiment are the same as those in a traditional mold, and will not be described in detail here. Therefore, the push plate 43 and push rod 44 are configured to provide a stable and uniform pushing force to the demolding module 41, ensuring smooth demolding and preventing deformation of the sealing head 1 or demolding failure due to uneven force, thus improving the demolding success rate and product yield. It should be noted that the demolding module 41 and push rod 44 in this embodiment can also be connected and fixed with screws or bolts.

[0054] A guide post 20 is provided on the fixed mold base 2, and a guide hole 31 is provided in the moving mold base 3. The guide post 20 is movably inserted into the guide hole 31. Figure 2 and Figure 3As shown, in this embodiment, the matching structure of the guide post 20 and the guide hole 31 ensures the precise alignment of the moving mold base 3 and the fixed mold base 2 during the mold closing and opening process, avoiding product defects or mold damage caused by misalignment, and improving the service life and molding quality of the mold.

[0055] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An injection mold with a quick demolding function for molding a closure head on a beverage cup cover, the closure head having a handle portion and a sealing portion connected to each other, an outer wall of the sealing portion being formed with a buckle strip, and a groove being formed in the sealing portion, characterized in that, include: Mold base; A movable mold base is movably disposed below the fixed mold base, and when the fixed mold base and the movable mold base are in contact, a product cavity is formed between the fixed mold base and the movable mold base; A demolding assembly is disposed within the moving mold base. The demolding assembly includes a forming block and a demolding module. The forming block is disposed within the demolding module and extends through the demolding module and movably into the product cavity to form the groove. The demolding module is movably disposed within the moving mold base and is used to drive the forming block and the formed sealing head away from the moving mold base in a vertical direction. A guide block is disposed within the moving mold base. The guide block is movably engaged with the molding block and is used to guide the molding block to move relative to the demolding module. When the demolding component moves the demolding module toward the fixed mold base, the formed sealing head causes the buckle strip to disengage from the product cavity. As the forming block moves relative to the demolding module in a direction perpendicular to the mold opening direction, the sealing head presses against the side wall of the demolding module and disengages from the forming block.

2. The injection mold with quick demolding function according to claim 1, characterized in that, The molding block is connected to a contouring part, and the demolding module has a guide hole. The contouring part passes through the guide hole and is movably inserted into the product cavity.

3. The injection mold with quick mold release function according to claim 1, wherein, The molded block is provided with a semi-sealed limiting groove. One end of the semi-sealed limiting groove opens towards the fixed mold base, and the other end opens away from the product cavity. The molding block is movably disposed in the semi-sealed limiting groove.

4. An injection mold with rapid demolding function according to claim 3, characterized in that, The bottom wall of the semi-sealed limiting groove is equipped with a guide block, and a locking block is formed on the guide block. The bottom wall of the forming block is formed with a locking groove, and the locking block is movably locked into the locking groove.

5. An injection mold with rapid demolding function according to claim 1, characterized in that, An inclined block is formed on the guide block, and an inclined groove is opened in the molding block. The inclined block is movably engaged with the inclined groove.

6. An injection mold with a rapid demolding function according to claim 1 or 5, characterized in that, The guide block has a mounting hole on its side wall, and the moving mold base has an assembly hole. When the mounting hole and the assembly hole are aligned, they can be connected by fasteners.

7. An injection mold with rapid demolding function according to claim 3, characterized in that, The detachment module is also provided with a clearance groove located on and connected to the bottom wall of the semi-sealed limiting groove, and the guide block extends movably into the clearance groove.

8. An injection mold with rapid demolding function according to claim 1, characterized in that, The demolding assembly further includes a push plate and a push rod. A fixed plate is connected to the push plate, and the top end of the push rod is connected to the demolding module, while the bottom end is connected to the fixed plate.

9. An injection mold with rapid demolding function according to claim 4, characterized in that, The bottom wall of the semi-sealed limiting groove is also provided with a positioning groove, and a positioning hole is provided in the positioning groove. The guide block extends into the positioning groove and is connected to the positioning hole.

10. An injection mold with rapid demolding function according to claim 1, characterized in that, The fixed mold base is provided with guide posts, and the moving mold base is provided with guide holes, with the guide posts being movably inserted into the guide holes.

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