Box cover embedded type plastic storage box injection mold

Abstract

The utility model provides a kind of box cover embedded plastic storage box injection mold, belong to mould technical field.It includes top plate, injection plate, upper die plate and middle die plate, the middle die plate is equipped with the rectangular profile forming groove of output through arrangement, the upper die plate bottom is provided with the upper forming surface being linked with rectangular profile forming groove, the middle die plate bottom is protrudingly provided with limiting portion, and the four corners of the limiting portion are integrally formed with positioning guide structure.The mould is provided with the positioning guide structure integrally formed in the four corners of the limiting portion of middle die plate bottom, improves the positioning accuracy in the process of mould opening and closing;Cooling runner structure realizes the efficient cooling of mould, and sealing connection structure guarantees the connection sealing property;The design effectively solves the problem of low opening and closing precision of traditional mould, and optimizes the overall working performance of mould.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an injection mold for a plastic storage box with an embedded lid. Background Technology

[0002] Plastic storage boxes with embedded lids are typically molded in one piece using injection molding, with the main body of the mold usually composed of upper, middle, and lower templates. In existing technology, although the bottom of the middle template has a limiting part to assist in mold positioning, the limiting part does not have a matching guide structure, which makes the mold prone to positioning deviation during opening and closing, resulting in low overall opening and closing accuracy, which may affect the molding dimensional accuracy and appearance quality of the injection molded parts. Summary of the Invention

[0003] The purpose of this utility model is to address the above-mentioned problems by providing an injection mold for a plastic storage box with an embedded lid.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An injection mold for a plastic storage box with an embedded lid includes a top plate, an injection plate, an upper template, and an intermediate template. The intermediate template has a rectangular forming groove through which an output is provided. The bottom of the upper template has an upper forming surface connected to the rectangular forming groove. The bottom of the intermediate template has a protruding limiting part. The four corners of the limiting part have integrally formed positioning and guiding structures. The upper template and the intermediate template also have cooling flow channel structures. A sealing connection structure is also provided between the upper template and the intermediate template.

[0005] In the aforementioned injection mold for a plastic storage box with an embedded lid, the positioning and guiding structure includes a guide portion integrally formed on the outside of the corner of the limiting part, and a guide groove is provided inside the guide portion.

[0006] In the aforementioned injection mold for a plastic storage box with an embedded lid, the outer wall of the limiting part is inclined.

[0007] In the above-mentioned injection mold for a plastic storage box with an embedded lid, the cooling channel structure includes an upper cooling channel set in the upper template, the upper cooling channel having an upper connecting port at the bottom of the upper template, a middle cooling channel on the middle template, and a lower connecting port at the top of the middle template that connects to the upper connecting port.

[0008] In the above-mentioned injection mold for a plastic storage box with an embedded lid, the sealing connection structure includes a sealing connection groove recessed inward at the top of the middle template and a sealing connection block protruding at the bottom of the upper template. The sealing connection groove and the sealing connection block are both arranged in a ring shape, and the upper connection port and the lower connection port are both located inside the sealing connection groove and the sealing connection block.

[0009] In the aforementioned injection mold for a plastic storage box with an embedded lid, the injection plate is also provided with a multi-point glue injection structure.

[0010] In the aforementioned injection mold for a plastic storage box with an embedded lid, the multi-point injection structure includes an I-shaped injection liquid distribution plate. Each of the four support arms of the injection liquid distribution plate is fixedly connected to an injection tube, which is connected to the upper molding surface.

[0011] In the aforementioned injection mold for a plastic storage box with an embedded lid, a reinforcing rib structure is also provided on the upper molding surface.

[0012] In the aforementioned injection mold for a plastic storage box with an embedded lid, the reinforcing rib forming structure includes several parallel reinforcing rib forming grooves that are recessed inward on the upper forming surface.

[0013] In the aforementioned injection mold for a plastic storage box with an embedded lid, a recessed molding block is also provided protruding from the inner wall of the rectangular molding groove.

[0014] Compared with existing technologies, the advantages of this utility model are: 1. The mold improves the positioning accuracy during the opening and closing process by setting an integrated positioning guide structure at the four corners of the bottom limiting part of the middle template; the cooling channel structure realizes efficient cooling of the mold, and the sealing connection structure ensures the sealing performance of the connection; this design effectively solves the problem of low opening and closing accuracy of traditional molds, and optimizes the overall working performance of the mold.

[0015] 2. The positioning and guiding structure adopts an integrated guide section on the outer side of the corner of the limiting part and an internal guide groove design. The guide groove provides a stable sliding guide path for the mold opening and closing, making the relative movement of the upper template and the middle template more precise and stable. This structure further enhances the positioning and guiding effect, avoids offset during the mold opening and closing process, and improves the reliability of mold operation.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure on the upper side of the upper template; Figure 3 This is a structural diagram of the intermediate template. Figure 4 This is a structural diagram of the upper template; Figure 5This is a schematic diagram of the structure on the upper side of the middle template. Detailed Implementation

[0018] like Figures 1-5 As shown, an injection mold for a plastic storage box with an embedded lid includes a top plate 1, an injection plate 2, an upper template 3, and an intermediate template 4. The intermediate template 4 has a rectangular forming groove 5 through which an output is provided. The bottom of the upper template 3 has an upper forming surface 6 connected to the rectangular forming groove 5. The bottom of the intermediate template 4 has a protruding limiting part 7. The four corners of the limiting part 7 are integrally formed with positioning guide structures 8. The upper template 3 and the intermediate template 4 are also provided with cooling flow channel structures 9. The upper template 3 and the intermediate template 4 are also provided with a sealing connection structure 10.

[0019] In this invention, the mold improves the positioning accuracy during the opening and closing process by setting an integrally formed positioning guide structure at the four corners of the bottom limiting part of the middle template; the cooling channel structure realizes efficient cooling of the mold, and the sealing connection structure ensures the sealing performance of the connection; this design effectively solves the problem of low opening and closing accuracy of traditional molds, and optimizes the overall working performance of the mold.

[0020] Specifically, the positioning and guiding structure 8 includes a guide portion 11 integrally formed on the outer side of the corner of the limiting part 7, and a guide groove 12 is provided inside the guide portion 11. The positioning and guiding structure adopts the design of an integrally formed guide portion on the outer side of the corner of the limiting part and an internal guide groove. The guide groove provides a stable sliding guide path for the mold opening and closing, making the relative movement of the upper template and the middle template more precise and stable. This structure further enhances the positioning and guiding effect, avoids offset during the mold opening and closing process, and improves the reliability of mold operation.

[0021] Specifically, the outer wall of the limiting part 7 is inclined. The inclined outer wall of the limiting part facilitates the engagement and disengagement of the limiting part with related components during the mold opening and closing process, reduces the frictional resistance between components, and makes the limiting action smoother and more precise. It avoids the engagement jamming problem caused by the vertical outer wall and improves the smoothness of mold opening and closing.

[0022] Specifically, the cooling channel structure 9 includes an upper cooling channel 13 disposed within the upper mold plate 3. The upper cooling channel 13 has an upper connecting port 14 at the bottom of the upper mold plate 3. The middle mold plate 4 has a middle cooling channel 15, and the middle cooling channel 15 has a lower connecting port 16 at the top of the middle mold plate 4, connecting to the upper connecting port 14. The cooling channel structure connects the upper cooling channel in the upper mold plate with the middle cooling channel in the middle mold plate through the upper and lower connecting ports. This design allows the cooling medium to form a complete circulating cooling path within the mold, expanding the cooling coverage area, improving cooling efficiency, ensuring uniform temperature across all parts of the mold, and contributing to the molding quality and efficiency of the injection molded parts.

[0023] Specifically, the sealing connection structure 10 includes a sealing connection groove 17 recessed inward at the top of the intermediate template 4 and a sealing connection block 18 protruding from the bottom of the upper template 3. Both the sealing connection groove 17 and the sealing connection block 18 are annularly arranged, with the upper connection port 14 and the lower connection port 16 located inside them. The sealing connection structure uses an annular fit between the sealing connection groove at the top of the intermediate template and the sealing connection block at the bottom of the upper template, placing the cooling channel connection port on the inner side. This annular sealing structure ensures the sealing of the connection between the upper and intermediate templates, effectively preventing leakage of the cooling medium; it also provides double protection for the cooling channel connection port, preventing leakage from affecting the cooling effect and the mold's service life.

[0024] Specifically, the injection molding plate 2 also features a multi-point injection structure. This structure allows the injection molding liquid to enter the molding area simultaneously from multiple points, avoiding the uneven filling problem caused by single-point injection. This design improves the filling speed and uniformity of the injection molding liquid in the molding tank, reduces defects such as air bubbles and insufficient material inside the injection molded parts, and ensures the quality of the injection molded parts.

[0025] Specifically, the multi-point injection structure includes an I-shaped injection molding liquid distribution plate 19. Each of the four arms of the injection molding liquid distribution plate 19 has an injection tube fixedly connected to its end, and the injection tube is connected to the upper molding surface 6. The multi-point injection structure uses an I-shaped injection molding liquid distribution plate, with its four arms connected to injection tubes and the upper molding surface. The I-shaped distribution plate ensures uniform injection molding liquid distribution, and the layout of the four arms ensures that the injection molding liquid can be evenly filled from different directions in the molding area, further improving the symmetry and uniformity of the filling. This is particularly suitable for the injection molding requirements of rectangular molding grooves, improving the overall consistency of the injection molded parts.

[0026] Specifically, the upper molding surface 6 also features a reinforcing rib molding structure. This reinforcing rib molding structure on the upper molding surface allows for integral molding of the reinforcing ribs onto the injection molded part, enhancing the structural strength and load-bearing capacity of the plastic storage box with the lid embedded. This design improves the product's mechanical properties without requiring subsequent processing, simplifies the production process, and extends the product's lifespan.

[0027] Specifically, the reinforcing rib forming structure includes several parallel reinforcing rib forming grooves 20 that are recessed inwards on the upper forming surface 6. The parallel arrangement of the forming grooves ensures a uniform distribution of the reinforcing ribs after forming, more effectively dispersing external forces and improving the overall structural stability of the product. The recessed design facilitates injection molding and ensures the quality of the reinforcing rib forming, further strengthening the structural strength of the product.

[0028] Specifically, a recessed molding block 21 protrudes from the inner wall of the rectangular molding groove 5. This recessed molding block allows for direct molding of the required recessed structure within the injection molded part, eliminating the need for subsequent machining and simplifying the production process. This design ensures the molding accuracy of the recessed portion and the connection strength with the product body, improving product molding integrity and production efficiency.

[0029] The working principle of this utility model is as follows: the mold improves the positioning accuracy during the opening and closing process by setting an integrally formed positioning guide structure at the four corners of the bottom limiting part of the middle template; the cooling channel structure realizes efficient cooling of the mold, and the sealing connection structure ensures the sealing performance of the connection; this design effectively solves the problem of low opening and closing accuracy of traditional molds, and optimizes the overall working performance of the mold. The positioning and guiding structure adopts an integrated guide part on the outer side of the corner of the limiting part and an internal guide groove design. The guide groove provides a stable sliding guide path for the mold opening and closing, making the relative movement of the upper template and the middle template more precise and stable. The outer wall of the limiting part is inclined, which facilitates the engagement and disengagement of the limiting part and related components during the mold opening and closing process, reduces the frictional resistance between components, and makes the limiting action smoother and more precise. It avoids the engagement jamming problem caused by the vertical outer wall and improves the smoothness of mold opening and closing. The cooling channel structure connects the upper cooling channel in the upper template with the middle cooling channel in the middle template, and the upper and lower connection ports are connected. The sealing connection structure adopts the sealing connection groove at the top of the middle template and the sealing connection block at the bottom of the upper template in a ring engagement, and the cooling channel connection port is placed on the inside. The multi-point injection structure within the injection molding plate allows the injection molten metal to enter the molding area simultaneously from multiple points, avoiding the uneven filling problem caused by single-point injection. The multi-point injection structure uses an I-shaped injection molten metal distribution plate, with its four supporting arms connected to the injection tube and the upper molding surface. The reinforcing rib molding structure on the upper molding surface can integrally form reinforcing ribs on the injection molded part, enhancing the structural strength and load-bearing capacity of the box lid embedded plastic storage box. The reinforcing rib molding structure uses several parallel and inwardly recessed reinforcing rib molding grooves. The recessed molding blocks protruding on the inner wall of the rectangular molding grooves can directly form the required recessed structure inside the injection molded part without subsequent cutting processing, simplifying the production process.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model 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 this utility model or exceeding the scope defined by the appended claims.

Claims

1. An injection mold for a plastic storage box with an embedded lid, comprising a top plate (1), an injection plate (2), an upper template (3), and an intermediate template (4), characterized in that, The intermediate template (4) is provided with a rectangular forming groove (5) through which the output is provided. The bottom of the upper template (3) is provided with an upper forming surface (6) connected to the rectangular forming groove (5). The bottom of the intermediate template (4) is provided with a limiting part (7). The four corners of the limiting part (7) are integrally formed with a positioning guide structure (8). The upper template (3) and the intermediate template (4) are also provided with a cooling channel structure (9). The upper template (3) and the intermediate template (4) are also provided with a sealing connection structure (10).

2. The injection mold for the plastic storage box with an embedded lid as described in claim 1, characterized in that, The positioning guide structure (8) includes a guide part (11) integrally formed on the outside of the corner of the limiting part (7), and a guide groove (12) is provided in the guide part (11).

3. The injection mold for the plastic storage box with an embedded lid according to claim 2, characterized in that, The outer wall of the limiting part (7) is inclined.

4. The injection mold for the plastic storage box with an embedded lid according to claim 2, characterized in that, The cooling channel structure (9) includes an upper cooling channel (13) disposed in the upper template (3), the upper cooling channel (13) having an upper connection port (14) at the bottom of the upper template (3), and a middle cooling channel (15) disposed on the middle template (4), the middle cooling channel (15) having a lower connection port (16) at the top of the middle template (4) connected to the upper connection port (14).

5. The injection mold for the plastic storage box with an embedded lid according to claim 4, characterized in that, The sealing connection structure (10) includes a sealing connection groove (17) recessed inward on the top of the middle template (4) and a sealing connection block (18) protruding from the bottom of the upper template (3). The sealing connection groove (17) and the sealing connection block (18) are both arranged in a ring shape, and the upper connection port (14) and the lower connection port (16) are both located inside the sealing connection groove (17) and the sealing connection block (18).

6. The injection mold for the plastic storage box with an embedded lid according to claim 1, characterized in that, The injection molding plate (2) is also provided with a multi-point glue injection structure.

7. The injection mold for the plastic storage box with an embedded lid according to claim 6, characterized in that, The multi-point injection structure includes an I-shaped injection liquid distribution plate (19), and each of the four arms of the injection liquid distribution plate (19) is fixedly connected to an injection tube, which is connected to the upper molding surface (6).

8. The injection mold for the plastic storage box with an embedded lid according to claim 1, characterized in that, The upper forming surface (6) is also provided with a reinforcing rib forming structure.

9. The injection mold for the plastic storage box with an embedded lid according to claim 8, characterized in that, The reinforcing rib forming structure includes several parallel reinforcing rib forming grooves (20) that are recessed inward on the upper forming surface (6).

10. The injection mold for the plastic storage box with an embedded lid according to claim 1, characterized in that, The inner wall of the rectangular forming groove (5) is also provided with a concave forming block (21).

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