Injection molding mold for inner protective plate of automobile door

Abstract

The utility model is suitable for the technical field of automobile injection molding, and provides an injection molding mold for an automobile door inner protection plate, which comprises a top plate, an upper mold connected with the top plate, a lower mold arranged at the bottom of the upper mold and a bottom plate arranged at the bottom of the lower mold, a first injection mold and a second injection mold are symmetrically arranged at the bottom of the side, close to the lower mold, of the upper mold, injection cavities are formed in the bottoms of the sides, close to the lower mold, of the first injection mold and the second injection mold, and a third injection mold and a fourth injection mold are symmetrically arranged at the top of the side, close to the upper mold, of the lower mold. The device solves the problem that the precision of an automobile door inner protection plate finished product cannot meet the production requirement due to slight displacement of the inner cavities of the upper die and the lower die in the molten plastic cooling process, and achieves the effects of setting multiple positioning, ensuring reliable connection of the upper die and the lower die, accurately positioning the inner cavities of the upper die and the lower die and improving the production efficiency. And the situation that the precision of the finished automobile door inner protection plate is unqualified due to displacement in the cavity is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile injection molding, and more specifically, to an injection molding mold for an automobile door inner guard plate. Background Art

[0002] With the progress of industry, cars have become an indispensable means of transportation in people's daily lives. The processing and manufacturing of auto parts are also developing in a continuous refinement. The car door inner guard plate is the main component of the door interior. The car door inner guard plate is installed on the inside of the car door, and the car armrest is installed on the car door inner guard plate.

[0003] The production of automobile door inner guard plates adopts injection molding process, which is also called injection molding. It is a molding method of injection and molding. During the injection molding process, the completely molten plastic material is stirred by a screw at a certain temperature, and then injected into the mold cavity with high pressure. After cooling and solidification, the molded product can be obtained. The injection molding process is suitable for mass production of parts with complex shapes and is one of the important processing methods.

[0004] During the injection molding process of the inner door panels of automobiles, high precision is required for the finished product, which means that the positioning between the molds needs to be precise enough to ensure that the size and shape of the finished automobile door panels meet the actual production requirements. When positioning the upper and lower molds, the existing injection molds mostly complete the connection between the upper and lower molds through the connection of screws and the limiting of side wall positioning parts. Although this method can achieve the positioning of the upper and lower molds, the positioning accuracy is not high and cannot meet the accuracy of the internal positioning of the cavity required for the injection molding of the inner door panels of automobiles. Therefore, it is easy to cause slight displacement of the internal cavities of the upper and lower molds during the cooling process of the molten plastic, which ultimately leads to the accuracy of the finished automobile door panels not meeting the production requirements. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an injection molding mold for automobile door inner guard panels with multiple positioning settings, which can ensure a reliable connection between the upper mold and the lower mold, while also being able to accurately position the internal cavities of the upper mold and the lower mold, thereby avoiding displacement inside the cavity during the injection molding process, resulting in unqualified precision of the finished automobile door inner guard panel.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An injection molding mold for an automobile door inner guard plate, comprising a top plate, an upper mold connected to the top plate, a lower mold arranged at the bottom of the upper mold, and a bottom plate arranged at the bottom of the lower mold; a first injection mold and a second injection mold are symmetrically arranged at the bottom of the upper mold near the side of the lower mold, and an injection cavity is arranged at the bottom of the first injection mold and the second injection mold near the side of the lower mold, and a third injection mold and a fourth injection mold are symmetrically arranged at the top of the lower mold near the side of the upper mold, a group of automobile door inner guard plates are arranged between the first injection mold and the third injection mold, and a group of automobile door inner guard plates are arranged between the second injection mold and the fourth injection mold; the top plate is arranged as a rectangular structure, and a circular injection through hole is opened through the center position thereof, and two rows of connecting screws with a total of several groups are arranged at the bottom of the top plate near the upper mold, and the two rows of connecting screws are symmetrically arranged about the axis of the length direction of the top plate and are arranged through the bottom of the top plate near the upper mold.

[0008] The utility model is further configured as follows: the upper mold is configured as a rectangular structure with a shape adapted to the top plate, and circular upper mold mounting through holes are penetrated at the four corners thereof, a plurality of groups of connecting through holes are penetrated at positions corresponding to the positions of the connecting screws on the upper mold, an upper mold mounting part that can be connected to the lower mold is disposed on the side wall of the upper mold, and a plurality of groups of upper mold heat dissipation ducts are disposed inside the upper mold close to the lower mold.

[0009] The utility model is further configured as follows: the connecting through hole is configured as a circular structure whose shape is adapted to the connecting screw, and its position corresponds to the connecting screw; the upper mold heat dissipation duct runs through the upper mold side wall, and the ends are respectively connected to the first injection mold and the second injection mold; the injection cavity is recessed at the bottom of the first injection mold and the second injection mold, and its shape is adapted to the shape of the automobile door inner guard plate.

[0010] The utility model is further configured as follows: the lower mold is configured as a rectangular structure that matches the shape of the upper mold, and lower mold mounting through holes are opened through its four corners; the lower mold side wall is provided with a lower mold mounting piece that can be connected to the upper mold, and a plurality of groups of lower mold heat dissipation ducts are arranged inside the side close to the upper mold; the lower mold mounting through hole is configured as a circular structure that matches the shape of the upper mold mounting through hole, and the position corresponds to the upper mold mounting through hole; the lower mold heat dissipation duct runs through the upper mold side wall, and the ends are respectively connected to the third injection mold and the fourth injection mold.

[0011] The utility model is further configured as follows: the third injection mold and the fourth injection mold are arranged near the protruding lower mold on one side of the upper mold, the positions of the third injection mold and the fourth injection mold respectively correspond to the first injection mold and the second injection mold, and the shapes are respectively adapted to the injection cavities at the bottom of the first injection mold and the second injection mold; a plurality of groups of injection mold locating parts are arranged around the side walls of the third injection mold and the fourth injection mold, and the two groups of injection mold locating parts are arranged equidistantly, and lower mold locating holes with shapes adapted to the injection mold locating parts are opened inside the lower mold at positions corresponding to the positions of the injection mold locating parts, and a lower mold locating part with a shape consistent with the injection mold locating parts is arranged on the top of each group of the lower mold locating holes.

[0012] By adopting the above technical solution, after the upper mold and the lower mold are positioned and connected, the injection mold positioning parts of the side walls of the third injection mold and the fourth injection mold can be inserted into the lower mold positioning hole to complete the positioning, and the injection mold positioning parts can also be connected upward to the lower mold positioning parts.

[0013] The utility model is further configured as follows: the base plate is configured as a rectangular structure whose shape is adapted to the upper mold and the lower mold, and mounting screws are provided at the four corners of its top, and the mounting screws are configured as a cylindrical structure; a buffer pad of a rectangular structure is provided on the top of the base plate close to the lower mold, and a plurality of groups of first support rods and second support rods are provided on the top of the buffer pad along the vertical direction, the top of the first support rod abuts against the bottom of the lower mold, and the top of the second support rod is inserted into the inside of the lower mold.

[0014] By adopting the above technical solution, the shape of the mounting screw is respectively adapted to the upper mold mounting through hole and the lower mold mounting through hole, and the mounting screw passes through the lower mold mounting through hole and the upper mold mounting through hole in sequence upward, thereby realizing the connection between the floor and the lower mold and the upper mold.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. During the positioning process of the upper die and the lower die, the positioning connection of the lower die and the upper die can be achieved by installing the screw rod, the bottom plate, the upper die mounting through hole, and the lower die mounting through hole, and the upper die and the lower die can be limited to a certain extent.

[0017] 2. The upper mold mounting parts arranged on the upper mold side wall and the lower mold mounting parts arranged on the lower mold side wall can be limited from the upper mold and lower mold side walls after the upper mold and the lower mold are positioned, thereby ensuring the reliable connection between the upper mold and the lower mold.

[0018] 3. The injection mold locating piece can be inserted into the lower mold locating hole to complete the positioning, and can also be connected upward to the lower mold locating piece, thereby limiting the third injection mold and the fourth injection mold to avoid displacement of the third injection mold and the fourth injection mold relative to the lower mold during the injection molding process, ultimately achieving the purpose of improving the precision of the finished product of the automobile door inner guard plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of an injection molding die for an inner guard plate of an automobile door.

[0020] Figure 2 It is a structural schematic diagram of the top plate in the utility model.

[0021] Figure 3 It is a structural schematic diagram of the upper die in the utility model.

[0022] Figure 4 This is a structural schematic diagram of the upper mold in the utility model from another perspective.

[0023] Figure 5 It is a structural schematic diagram of the lower mold in the utility model.

[0024] Figure 6 It is a schematic diagram of the explosion structure of the lower mold in the utility model.

[0025] Figure 7 It is a schematic structural diagram of the third injection mold and the fourth injection mold in the utility model.

[0026] Figure 8 It is a structural schematic diagram of the bottom plate of the utility model.

[0027] Description of reference numerals: 1, top plate; 11, injection molding through hole; 12, connecting screw;

[0028] 2. Upper mold; 21. Connecting through hole; 22. Upper mold mounting through hole; 23. Upper mold heat dissipation pipeline; 24. First injection mold; 25. Second injection mold; 26. Injection cavity; 27. Upper mold mounting piece;

[0029] 3. Lower mold; 31. Lower mold mounting through hole; 32. Lower mold heat dissipation pipe; 33. Lower mold mounting piece; 34. Lower mold positioning piece; 35. Lower mold positioning hole; 36. Third injection mold; 37. Fourth injection mold; 38. Injection mold positioning piece;

[0030] 4. Bottom plate; 41. Mounting screw; 42. First support rod; 43. Second support rod; 44. Buffer pad;

[0031] 5. Car door inner guard plate. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] For example, see Figure 1-8 , the utility model provides the following technical solutions:

[0035] Specifically refers to an injection molding mold for automobile door inner guard plate, see Figure 1 , including a top plate 1, an upper mold 2, a lower mold 3, a bottom plate 4 and an automobile door inner guard plate 5, the upper mold 2 is arranged at the bottom of the top plate 1, the top plate 1 is connected to the upper mold 2, the lower mold 3 is arranged at the bottom of the upper mold 2, the bottom plate 4 is arranged at the bottom of the lower mold 3, and the bottom plate 4 is connected to the lower mold 3. After the upper mold 2 and the lower mold 3 are connected, a cavity is formed inside, and molten plastic is injected into the cavity. After the molten plastic is cooled and formed, the automobile door inner guard plate 5 can be formed on the upper mold 2 and the lower mold 3.

[0036] See also Figure 2 The top plate 1 is set to a rectangular structure, and a circular injection hole 11 is opened at its center. Injection molding is to inject molten plastic into the mold through the injection hole 11. Two rows of connecting screws 12 are arranged at the bottom of the top plate 1 near the upper mold 2. The two rows of connecting screws 12 are symmetrically arranged about the longitudinal axis of the top plate 1 and are arranged through the bottom of the top plate 1 near the upper mold 2. The connecting bolts 12 can connect the top plate 1 and the upper mold 2 to ensure the reliability of the connection between the two.

[0037] See also Figure 3-4 , a plurality of groups of connecting through holes 21 are provided on the upper mold 2 at positions corresponding to the positions of the connecting screws 12. The connecting through holes 21 are set to be circular structures with shapes matching the connecting screws 12, and their positions correspond to the connecting screws 12. The connection between the top plate 1 and the upper mold 2 can be achieved by connecting the connecting bolts 12 with the connecting bolts 12. The upper mold 2 is set to be a rectangular structure with shapes matching the top plate 1, and circular upper mold mounting through holes 22 are provided at the four corners. The side wall of the upper mold 2 is provided with an upper mold mounting part 27 that can be connected to the lower mold 3. After the positioning of the upper mold 2 and the lower mold 3 is completed, the side wall is limited to ensure the reliable connection between the upper mold 2 and the lower mold 3.

[0038] See also Figure 3-4The first injection mold 24 and the second injection mold 25 are symmetrically arranged at the bottom of the upper mold 2 near the lower mold 3, and the first injection mold 24 and the second injection mold 25 are arranged at the bottom of the lower mold 3. The injection cavity 26 is recessed in the bottom of the first injection mold 24 and the second injection mold 25, and its shape is adapted to the shape of the automobile door inner guard plate 5. A plurality of groups of upper mold heat dissipation pipes 23 are arranged inside the upper mold 2 near the lower mold 3. The upper mold heat dissipation pipes 23 are arranged through the side wall of the upper mold 2, and the ends are connected to the first injection mold 24 and the second injection mold 25 respectively. The upper mold heat dissipation pipes 23 can quickly cool the first injection mold 24 and the second injection mold 25, thereby reducing the time required for demolding.

[0039] See also Figure 5-7 The lower mold 3 is set to a rectangular structure that matches the shape of the upper mold 2, and the four corners thereof are penetrated with lower mold mounting holes 31. The lower mold mounting holes 31 are set to a circular structure that matches the shape of the upper mold mounting holes 22, and the positions correspond to the upper mold mounting holes 22. The side wall of the lower mold 3 is provided with a lower mold mounting part 33 that can be connected to the upper mold 2. After the upper mold 2 and the lower mold 3 are positioned, the side wall is limited to ensure the reliable connection between the upper mold 2 and the lower mold 3. Several groups of lower mold heat dissipation pipes 32 are arranged inside the lower mold 3 near the upper mold 2. The lower mold heat dissipation pipes 32 are set through the side wall of the upper mold 2, and the ends are connected to the third injection mold 36 and the fourth injection mold 37 respectively. The lower mold heat dissipation pipes 32 can quickly cool the third injection mold 36 and the fourth injection mold 37, thereby reducing the time required for demolding.

[0040] See also Figure 5-7, the third injection mold 36 and the fourth injection mold 37 are symmetrically arranged on the top of the side of the lower mold 3 close to the upper mold 2, and the third injection mold 36 and the fourth injection mold 37 are arranged near the side of the upper mold 2 and protrude from the lower mold 3. The positions of the third injection mold 36 and the fourth injection mold 37 correspond to the first injection mold 24 and the second injection mold 25, respectively, and the shapes are adapted to the injection cavities 26 at the bottom of the first injection mold 24 and the second injection mold 25, respectively. A group of automobile door inner guard plates 5 are arranged between the first injection mold 24 and the third injection mold 36, and a group of automobile door inner guard plates 5 are arranged between the second injection mold 25 and the fourth injection mold 37. After the upper mold 2 and the lower mold 3 are connected and positioned, a cavity for injection molding of the automobile door inner guard plates 5 is formed between the first injection mold 24 and the third injection mold 36, and a cavity for injection molding of the automobile door inner guard plates 5 is formed between the second injection mold 25 and the fourth injection mold 37. Several groups of injection mold locating parts 38 are arranged around the side walls of the third injection mold 36 and the fourth injection mold 37, and the two groups of injection mold locating parts 38 are arranged equidistantly. A lower mold locating hole 35 whose shape matches the injection mold locating part 38 is opened in the lower mold 3 at the position corresponding to the position of the injection mold locating part 38, and a lower mold locating part 34 whose shape is consistent with the injection mold locating part 38 is arranged on the top of each group of lower mold locating holes 35. After the upper mold 2 and the lower mold 3 are positioned and connected, the injection mold locating parts 38 on the side walls of the third injection mold 36 and the fourth injection mold 37 can be inserted into the lower mold locating hole 35 to complete the positioning, and the injection mold locating parts 38 can also be connected upward with the lower mold locating part 34. In this way, the third injection mold 36 and the fourth injection mold 37 are limited, and the displacement of the third injection mold 36 and the fourth injection mold 37 relative to the lower mold 3 is avoided during the injection molding process, and finally the purpose of improving the precision of the finished product of the automobile door inner guard plate 5 is achieved.

[0041] See also Figure 8 The bottom plate 4 is configured as a rectangular structure that matches the upper mold 2 and the lower mold 3. A rectangular buffer pad 44 is provided on the top of the bottom plate 4 near the lower mold 3. A plurality of groups of first support rods 42 and second support rods 43 are provided on the top of the buffer pad 44 in the vertical direction. The top of the first support rod 42 abuts against the bottom of the lower mold 3, and the top of the second support rod 43 is inserted into the lower mold 3. The first support rod 42 and the second support rod 43 can transfer the pressure on the lower mold 3 during the injection molding process to the buffer pad 44, which is used for buffering. Mounting screws 41 are provided at the four corners of the top of the base plate 4. The mounting screws 41 are set to a cylindrical structure, and their shapes are respectively adapted to the upper mold mounting through hole 22 and the lower mold mounting through hole 31. The mounting screws 41 pass through the lower mold mounting through hole 31 and the upper mold mounting through hole 22 in sequence. During the positioning process of the upper mold 2 and the lower mold 3, the positioning connection of the lower mold 3 and the upper mold 2 can be achieved through the cooperation of the mounting screws 41 with the base plate 4, the upper mold mounting through hole 22 and the lower mold mounting through hole 31, and the upper mold 2 and the lower mold 3 can be limited to a certain extent.

[0042] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. An injection molding mold for an automobile door inner guard plate, characterized in that: It comprises a top plate (1), an upper mold (2) connected to the top plate (1), a lower mold (3) arranged at the bottom of the upper mold (2), and a bottom plate (4) arranged at the bottom of the lower mold (3); A first injection mold (24) and a second injection mold (25) are symmetrically arranged at the bottom of the upper mold (2) on the side close to the lower mold (3); an injection cavity (26) is arranged at the bottom of the first injection mold (24) and the second injection mold (25) on the side close to the lower mold (3); a third injection mold (36) and a fourth injection mold (37) are symmetrically arranged at the top of the lower mold (3) on the side close to the upper mold (2); a group of automobile door inner guard plates (5) are arranged between the first injection mold (24) and the third injection mold (36); and a group of automobile door inner guard plates (5) are arranged between the second injection mold (25) and the fourth injection mold (37); The top plate (1) is arranged in a rectangular structure, and a circular injection hole (11) is provided at the center thereof. Two rows of connecting screws (12) are arranged on the bottom of the top plate (1) close to the upper mold (2). The two rows of connecting screws (12) are symmetrically arranged about the longitudinal axis of the top plate (1) and are arranged through the bottom of the top plate (1) close to the upper mold (2).

2. The injection molding die for an automobile door inner panel according to claim 1, characterized in that: The upper mold (2) is configured as a rectangular structure having a shape adapted to the top plate (1), and circular upper mold mounting through holes (22) are provided at the four corners thereof, a plurality of groups of connecting through holes (21) are provided at positions corresponding to the positions of the connecting screws (12) on the upper mold (2), an upper mold mounting member (27) that can be connected to the lower mold (3) is provided on the side wall of the upper mold (2), and a plurality of groups of upper mold heat dissipation pipes (23) are provided inside the upper mold (2) on a side close to the lower mold (3).

3. The injection molding die for the inner door panel of an automobile according to claim 2, characterized in that: The connecting through hole (21) is arranged as a circular structure whose shape matches that of the connecting screw (12), and whose position corresponds to that of the connecting screw (12); the upper mold heat dissipation pipe (23) is arranged to penetrate the side wall of the upper mold (2), and its ends are respectively connected to the first injection mold (24) and the second injection mold (25); the injection cavity (26) is arranged to be recessed at the bottom of the first injection mold (24) and the second injection mold (25), and its shape matches that of the automobile door inner guard plate (5).

4. The injection molding die for an automobile door inner panel according to claim 1, characterized in that: The lower mold (3) is configured as a rectangular structure that matches the shape of the upper mold (2), and has lower mold mounting through holes (31) extending through its four corners; a lower mold mounting member (33) that can be connected to the upper mold (2) is provided on the side wall of the lower mold (3), and a plurality of groups of lower mold heat dissipation pipes (32) are provided inside the side close to the upper mold (2); The lower mold mounting through hole (31) is arranged as a circular structure whose shape matches that of the upper mold mounting through hole (22) and whose position corresponds to that of the upper mold mounting through hole (22); the lower mold heat dissipation pipe (32) is arranged to penetrate the side wall of the upper mold (2) and its ends are respectively connected to the third injection mold (36) and the fourth injection mold (37).

5. The injection molding die for the inner door panel of an automobile according to claim 4, characterized in that: The third injection mold (36) and the fourth injection mold (37) are arranged protruding from the lower mold (3) near one side of the upper mold (2); the positions of the third injection mold (36) and the fourth injection mold (37) respectively correspond to the first injection mold (24) and the second injection mold (25), and the shapes are respectively adapted to the injection cavities (26) at the bottoms of the first injection mold (24) and the second injection mold (25); A plurality of groups of injection mold locating parts (38) are arranged around the side walls of the third injection mold (36) and the fourth injection mold (37), and the two groups of injection mold locating parts (38) are arranged equidistantly. Lower mold locating holes (35) whose shapes match the injection mold locating parts (38) are opened inside the lower mold (3) at positions corresponding to the positions of the injection mold locating parts (38), and a lower mold locating part (34) whose shape is consistent with the injection mold locating parts (38) is arranged at the top of each group of the lower mold locating holes (35).

6. The injection molding die for an automobile door inner panel according to claim 1, characterized in that: The bottom plate (4) is configured as a rectangular structure whose shape matches that of the upper mold (2) and the lower mold (3), and mounting screws (41) are provided at the four corners of the top thereof, and the mounting screws (41) are configured as cylindrical structures; A buffer pad (44) with a rectangular structure is arranged on the top of the bottom plate (4) near the lower mold (3), and a plurality of groups of first support rods (42) and second support rods (43) are arranged on the top of the buffer pad (44) in a vertical direction, the top of the first support rod (42) abuts against the bottom of the lower mold (3), and the top of the second support rod (43) is inserted into the interior of the lower mold (3).

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