Outdoor thermal box cover rubber coating injection mold

Abstract

This utility model provides an injection mold for overmolding an outdoor insulated box lid, belonging to the field of mold technology. It includes an upper mold plate and a lower mold plate, with an overmolding cavity between them. The lower mold plate has a lid body fixing structure for securing the insulated box lid. The lid body fixing structure has four lid snap-on mounting portions circumferentially arranged, each with a snap-on positioning groove. The lid body fixing structure and the snap-on positioning grooves at the lid snap-on mounting portions within the overmolding cavity precisely fix the insulated box lid within the cavity, facilitating subsequent overmolding. A non-damaging ejection mechanism and a self-separating inclined ejection structure enable damage-free ejection of the insulated box lid, effectively preventing damage during the ejection process.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an injection mold for overmolding an outdoor thermal box lid. Background Technology

[0002] Plastic insulated box lids are generally injection molded. The injection molding process for plastic insulated box lids involves two steps. First, the main body of the insulated box lid is injection molded using a first mold. Then, the injection-molded main body of the insulated box lid is placed into a second mold for overmolding. However, in the existing technology, in order to prevent the insulated box lid from becoming loose after being installed in the second mold, the connection of the mold for the main body of the insulated box lid needs to be designed to be relatively tight. However, a tight connection can make the lid easily damaged when ejected. Utility Model Content

[0003] The purpose of this utility model is to address the above-mentioned problems by providing an injection mold for overmolding an outdoor thermal box lid.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An outdoor insulated box lid overmolding injection mold includes an upper mold and a lower mold, with an overmolding cavity between the upper and lower molds. The lower mold has a lid body fixing structure for fixing the insulated box lid. The lid body fixing structure has four lid snap-on plate mounting parts around its circumference, and each lid snap-on plate mounting part has a snap-on plate positioning groove. A top plate is provided on the lower side of the lower mold, and the top plate has a non-damaging ejection mechanism corresponding to the insulated box lid and a self-separating inclined ejection structure corresponding to the snap-on plate positioning groove.

[0006] In the aforementioned outdoor thermal insulation box lid overmolding injection mold, the main body fixing structure of the lid includes a fixing plate mounting groove recessed inward on the lower template. A lid fixing seat is provided in the fixing plate mounting groove. The lid fixing seat has a circular cross-section and an inner annular fixing groove corresponding to the thermal insulation box lid is recessed inward at the top edge of the lid fixing seat. An outer annular fixing groove is formed between the top outer edge of the lid fixing seat and the inner wall of the fixing plate mounting groove.

[0007] In the aforementioned outdoor thermal box lid overmolding injection mold, the non-damaging ejection mechanism includes several straight ejector rods arranged circumferentially. The straight ejector rods are correspondingly arranged with the inner annular fixing groove, and the top of the straight ejector rods is provided with a flat ejector pin that matches the inner annular fixing groove.

[0008] In the aforementioned outdoor thermal box lid overmolding injection mold, the straight ejector rod has a circular structure and its bottom is fixedly connected to the top plate, while the flat ejector pin has a rectangular cross-section and is fixed to the top of the straight ejector rod.

[0009] In the aforementioned outdoor thermal box lid overmolding injection mold, the length of the flat ejector pin is greater than the depth of the inner annular fixing groove.

[0010] In the aforementioned outdoor thermal box lid overmolding injection mold, the self-separating inclined ejector structure includes an inclined ejector rod that is inclined towards the center of the lid fixing seat, and the buckle plate buckle positioning groove is connected to the side of the inclined ejector rod away from the lid fixing seat.

[0011] In the aforementioned outdoor thermal box lid overmolding injection mold, a portion of the buckle plate buckle positioning groove is formed on the inclined push rod.

[0012] In the aforementioned outdoor thermal box lid overmolding injection mold, the bottom of the inclined ejector rod and the top plate are rotatably connected.

[0013] In the aforementioned outdoor thermal insulation box lid overmolding injection mold, the lid fixing seat is detachably fixed in the fixing plate mounting groove by several bolts.

[0014] In the aforementioned outdoor thermal box lid overmolding injection mold, the bottom of the lid fixing seat is also provided with a cooling channel.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] 1. The lid fixing structure and the buckle plate positioning groove set in the lid buckle plate mounting part of the box cover cavity can accurately fix the lid of the insulated box in the box cover cavity to cooperate with the subsequent glue covering. The non-damaging ejection mechanism and the self-separating inclined ejection structure can realize the non-damaging ejection of the lid of the insulated box, effectively avoiding damage to the lid during the ejection process.

[0017] 2. The main body fixing structure of the box lid adopts the design of fixing plate mounting groove, box lid fixing seat, and inner and outer ring fixing grooves, which can stably fix the box lid of the insulation box, ensure the precise position of the box lid during injection molding, and improve the quality of overmolding and injection molding precision.

[0018] 3. The flat pin design at the top of the straight push rod in the non-damaging ejection mechanism ensures that the force point during lid ejection is located on the part where the lid is inserted into the inner annular fixing groove. The thickness of this part in the vertical direction is much greater than that of other parts of the lid body. Moreover, this part is located in the inner annular fixing groove during ejection and is not easily twisted or deformed under the protection of the groove. Therefore, setting the force point in this part can effectively protect the insulated lid and achieve non-damaging ejection of the insulated lid. The multiple flat pins can apply force with a larger contact area, disperse the ejection pressure, and avoid damage to the lid due to uneven force.

[0019] 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

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 2 This is a structural diagram of the lower template;

[0022] Figure 3 This is a partial structural diagram of the lower template;

[0023] Figure 4 This is a structural diagram of the mounting slot for the fixing plate;

[0024] Figure 5 This is a schematic diagram of the structure of the lid fixing base. Detailed Implementation

[0025] like Figures 1-5 As shown, an outdoor insulated box lid overmolding injection mold includes an upper mold plate 1 and a lower mold plate 2. An overmolding cavity 3 is provided between the upper mold plate 1 and the lower mold plate 2. The lower mold plate 2 is provided with a lid body fixing structure 4 for fixing the insulated box lid. The lid body fixing structure 4 is provided with four lid snap-on plate mounting parts 5 around its circumference. The lid snap-on plate mounting parts 5 are provided with snap-on plate snap-on positioning grooves 6. The lower side of the lower mold plate 2 is provided with a top plate 7. The top plate 7 is provided with a non-damaging ejection mechanism 8 corresponding to the insulated box lid and a self-separating inclined ejection structure 9 corresponding to the snap-on plate snap-on positioning grooves 6.

[0026] In this invention, the lid body fixing structure and the buckle plate buckle positioning groove set in the lid buckle plate mounting part of the box cover can accurately fix the lid of the insulated box in the box cover cavity to cooperate with the subsequent glue coating. The non-damaging ejection mechanism and the self-separating inclined ejection structure can realize the non-damaging ejection of the lid of the insulated box, effectively avoiding damage to the lid during the ejection process.

[0027] Specifically, the lid fixing structure 4 includes a fixing plate mounting groove 10 recessed inward on the lower template 2. A lid fixing seat 11 is disposed within the fixing plate mounting groove 10. The lid fixing seat 11 has a circular cross-section, and an inner annular fixing groove 12 corresponding to the lid of the insulation box is recessed inward at the top edge of the lid fixing seat 11. An outer annular fixing groove 13 is formed between the outer top edge of the lid fixing seat 11 and the inner wall of the fixing plate mounting groove 10. The lid fixing structure, with its fixing plate mounting groove, lid fixing seat, and inner and outer annular fixing grooves, can stably fix the lid of the insulation box, ensuring accurate lid positioning during injection molding and improving the quality of the overmolding and injection precision.

[0028] Specifically, the damage-free ejection mechanism 8 includes several straight push rods 14 arranged circumferentially. Each straight push rod 14 corresponds to an inner annular fixing groove 12, and each straight push rod 14 has a flat ejector pin 15 at its top end that matches the inner annular fixing groove 12. The design of the flat ejector pin at the top of the straight push rod in the damage-free ejection mechanism ensures that the force point during lid ejection is located on the portion of the lid that is engaged within the inner annular fixing groove. This portion is significantly thicker in the vertical direction than other parts of the lid body, and because it is located within the inner annular fixing groove during ejection, it is less prone to twisting or deformation under the protection of the groove. Therefore, placing the force point in this portion effectively protects the insulated lid, achieving damage-free ejection. The multiple flat ejector pins allow for a larger contact area to apply force, dispersing the ejection pressure and preventing damage to the lid due to uneven force distribution.

[0029] Specifically, the straight push rod 14 has a circular structure and its bottom is fixedly connected to the top plate 7. The flat push pin 15 has a rectangular cross-section and is fixed to the top of the straight push rod 14. The circular structure of the straight push rod and its fixed connection to the top plate, along with the rectangular cross-section of the flat push pin fixed to the top of the straight push rod, ensure the stability of the ejection mechanism structure. This allows for the stable transmission of ejection force during the ejection process, ensuring reliable ejection action and improving the ejection effect.

[0030] Specifically, the length of the flat ejector pin 15 is greater than the depth of the inner annular fixing groove 12.

[0031] Specifically, the self-separating inclined ejector structure 9 includes an inclined ejector rod 16, which is inclined towards the center of the lid fixing seat 11. The snap-fit ​​positioning groove 6 of the snap-fit ​​plate is connected to the side of the inclined ejector rod 16 away from the lid fixing seat 11. In the self-separating inclined ejector structure, the inclined ejector rod is inclined and cooperates with the snap-fit ​​positioning groove of the snap-fit ​​plate. During ejection, the inclined ejector rod can automatically separate from the snap-fit ​​on the snap-fit ​​plate, simplifying the demolding process, avoiding interference between the snap-fit ​​and the inclined ejector rod, and making demolding smoother and more efficient.

[0032] Specifically, a portion of the snap-fit ​​positioning groove 6 of the snap-fit ​​plate is formed on the inclined ejector rod 16. The snap-fit ​​positioning groove portion of the snap-fit ​​plate is formed on the inclined ejector rod, which optimizes the matching structure between the snap-fit ​​positioning groove and the inclined ejector rod, making the positioning and separation actions of the snap-fit ​​rod more precise during ejection and separation, and improving the demolding stability and reliability.

[0033] Specifically, the bottom of the angled ejector rod 16 is rotatably connected to the top plate 7. This rotatable connection between the bottom of the angled ejector rod and the top plate allows for more flexible movement of the ejector rod during ejection and separation, better adapting to the structural characteristics of the snap-fit ​​plate, ensuring that the angled ejector rod can smoothly complete the automatic separation action, reducing demolding difficulty and improving demolding efficiency.

[0034] Specifically, the lid fixing seat 11 is detachably fixed to the fixing plate mounting groove 10 by several bolts. The lid fixing seat is detachably fixed to the fixing plate mounting groove by bolts, which facilitates the replacement and maintenance of the lid fixing seat. When it is necessary to produce lids of different specifications, the appropriate lid fixing seat can be quickly replaced, improving the versatility of the mold and the flexibility of production.

[0035] Specifically, the bottom of the lid fixing seat 11 is also provided with a cooling channel 17. The cooling channel at the bottom of the lid fixing seat can accelerate the cooling speed during the lid injection molding process, so that the lid can be quickly shaped, shorten the production cycle, and at the same time ensure uniform cooling of the lid, avoiding quality problems such as deformation caused by uneven cooling, and improving product quality.

[0036] The working principle of this utility model is as follows: the lid body fixing structure and the buckle plate buckle positioning groove set in the glue-coating cavity can accurately fix the lid of the insulated box in the glue-coating cavity to cooperate with the subsequent glue coating. The non-damaging ejection mechanism and the self-separating inclined ejection structure can realize the non-damaging ejection of the lid of the insulated box, effectively avoiding damage to the lid during the ejection process.

[0037] The lid's main fixing structure employs a fixing plate mounting groove, a lid fixing seat, and inner and outer annular fixing grooves. This design ensures stable fixation of the insulated box lid, guaranteeing precise lid positioning during injection molding, improving overmolding quality and injection precision. The flat ejector pin at the tip of the straight ejector rod in the non-damaging ejection mechanism ensures that the force point during lid ejection is located on the portion of the lid that engages with the inner annular fixing groove. This portion is significantly thicker vertically than other parts of the lid body, and it remains within the inner annular fixing groove during ejection. Under the protection of the tank body, it is not easy to twist and deform. Therefore, setting the stress point in this part can effectively protect the insulated box lid and achieve the non-damaged ejection of the insulated box lid. The setting of multiple flat ejector pins can apply force with a large contact area, disperse the ejection pressure, and avoid damage to the box lid due to uneven force. The circular structure of the straight ejector rod and its fixed connection with the top plate, and the rectangular cross-section of the flat ejector pins fixed to the top of the straight ejector rod, ensure the stability of the ejection mechanism structure, can stably transmit the ejection force during the ejection process, ensure the reliability of the ejection action, and improve the ejection effect.

[0038] In the self-separating angled ejector structure, the angled ejector rod is inclined and cooperates with the snap-on positioning groove of the snap-on plate. During ejection, the angled ejector rod can automatically separate from the snap-on on the snap-on plate, simplifying the demolding process, avoiding interference between the snap-on and the angled ejector rod, and making demolding smoother and more efficient. The snap-on positioning groove of the snap-on plate is formed on the angled ejector rod, optimizing the cooperation structure between the snap-on positioning groove and the angled ejector rod. This makes the positioning and separation action of the angled ejector rod on the snap-on during ejection and separation more precise, improving demolding stability and reliability. The bottom of the angled ejector rod is rotatably connected to the top plate, making the angled ejector rod move more flexibly during ejection and separation, better adapting to the structural characteristics of the snap-on plate snap-on, ensuring that the angled ejector rod can smoothly complete the automatic separation action, reducing demolding difficulty and improving demolding efficiency.

[0039] 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 overmolding an outdoor thermal box lid, comprising an upper mold plate (1) and a lower mold plate (2), characterized in that, A rubber-coated cavity (3) is provided between the upper template (1) and the lower template (2). The lower template (2) is provided with a lid body fixing structure (4) for fixing the lid of the heat preservation box. The lid body fixing structure (4) is provided with four lid buckle plate mounting parts (5) in the circumferential direction. The lid buckle plate mounting parts (5) are provided with buckle plate buckle positioning grooves (6). The lower template (2) is provided with a top plate (7). The top plate (7) is provided with a non-damaging ejection mechanism (8) corresponding to the lid of the heat preservation box and a self-separating inclined ejection structure (9) corresponding to the buckle plate buckle positioning grooves (6).

2. The outdoor thermal box lid overmolding injection mold according to claim 1, characterized in that, The main body fixing structure (4) of the box cover includes a fixing plate mounting groove (10) recessed inward on the lower template (2). A box cover fixing seat (11) is provided in the fixing plate mounting groove (10). The box cover fixing seat (11) has a circular cross section and an inner annular fixing groove (12) corresponding to the box cover of the heat preservation box is recessed inward at the top edge of the box cover fixing seat (11). An outer annular fixing groove (13) is formed between the top outer edge of the box cover fixing seat (11) and the inner wall of the fixing plate mounting groove (10).

3. The outdoor thermal insulation box lid overmolding injection mold according to claim 2, characterized in that, The non-damaging ejection mechanism (8) includes several straight ejector rods (14) arranged circumferentially. The straight ejector rods (14) are arranged corresponding to the inner annular fixing groove (12). The top of the straight ejector rod (14) is provided with a flat ejector pin (15) that is adapted to the inner annular fixing groove (12).

4. The outdoor thermal box lid overmolding injection mold according to claim 3, characterized in that, The straight push rod (14) has a circular structure and its bottom is fixed to the top plate (7). The flat push pin (15) has a rectangular cross section and is fixed to the top of the straight push rod (14).

5. The outdoor thermal box lid overmolding injection mold according to claim 4, characterized in that, The length of the flat ejector pin (15) is greater than the depth of the inner annular fixing groove (12).

6. The outdoor thermal box lid overmolding injection mold according to claim 2, characterized in that, The self-separating inclined ejection structure (9) includes an inclined ejection rod (16) that is inclined towards the center of the lid fixing seat (11). The buckle plate buckle positioning groove (6) is connected to the side of the inclined ejection rod (16) away from the lid fixing seat (11).

7. The outdoor thermal insulation box lid overmolding injection mold according to claim 6, characterized in that, A portion of the buckle plate buckle positioning groove (6) is formed on the inclined top rod (16).

8. The outdoor thermal box lid overmolding injection mold according to claim 6, characterized in that, The bottom of the inclined top rod (16) and the top plate (7) are rotatably connected.

9. The outdoor thermal insulation box lid overmolding injection mold according to claim 2, characterized in that, The lid fixing seat (11) is detachably fixed in the fixing plate mounting groove (10) by several bolts.

10. The outdoor thermal insulation box lid overmolding injection mold according to claim 2, characterized in that, The bottom of the lid fixing seat (11) is also provided with a cooling channel (17).

Images