A mold cavity block structure for injection mold of plastic parts of automobile door upper trim

Abstract

The utility model relates to a cavity spring block structure of an injection mold for a plastic part of an automobile door trim panel, comprising an upper mold body and a lower mold body, the upper mold body comprising an upper fixed plate, a hot runner plate, and a fixed mold plate, the lower mold body comprising a lower fixed plate, two mold feet, two top plates, an ejection mechanism arranged on the two top plates, and a movable mold plate, the fixed mold plate is provided with two first sliding grooves, the two first sliding grooves are both slidably connected with sliding blocks, the two sliding blocks are both provided with a driving part, the driving part is used to drive the sliding blocks to move in a direction away from the top wall of the first sliding groove, the movable mold plate is provided with two guiding blocks, one of which is provided with a first inclined surface along the axial direction of the first adsorption hole, the other guide block is provided with a second inclined surface along the axial direction of the second adsorption hole, and the two sliding blocks are respectively provided with a third inclined surface and a fourth inclined surface, and the utility model can effectively solve the problem of undercut between the first adsorption hole and the second adsorption hole and the mold.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a cavity spring block structure of an injection mold for a plastic part of an upper trim plate of an automobile door. Background Art

[0002] A plastic part for a car door trim panel Figure 1 and Figure 2 As shown, it includes a left decorative panel 8 and a right decorative panel 9. A first adsorption hole 81 is opened on the side wall of the left decorative panel 8, and a second adsorption hole is opened on the side wall of the right decorative panel 9. The inclination angles of the first adsorption hole and the second adsorption hole are opposite. After the left decorative panel 8 and the right decorative panel 9 are injection molded, the first adsorption hole 81 and the second adsorption hole 92 will form an inverted structure with the mold, thereby affecting the demolding of the left decorative panel 8 and the right decorative panel 9. Utility Model Content

[0003] The present application provides a cavity spring block structure of an injection mold for a plastic part of an automobile door upper trim panel, which can effectively solve the problem of undercuts between a first adsorption hole and a second adsorption hole and the mold.

[0004] The present application provides a mold cavity spring block structure for a plastic part of an automobile door upper trim panel, which adopts the following technical solution:

[0005] A mold cavity spring block structure for an injection mold of a plastic part of an upper trim panel of a car door, comprising an upper mold body and a lower mold body, wherein the upper mold body comprises an upper fixed plate, a hot runner plate, and a fixed mold plate, and the lower mold body comprises a lower fixed plate, two mold feet, two top plates, an ejection mechanism arranged on the two top plates, and a movable mold plate, wherein two first slide grooves are arranged on the fixed mold plate, and the distance between the two first slide grooves gradually decreases from one end close to the movable mold plate to one end far from the movable mold plate, and sliding blocks are slidably connected in the two first slide grooves, and the two sliding blocks are respectively used to form the side wall of the left trim panel and the side wall of the right trim panel , the two sliding blocks are both provided with a driving part, and the driving part is used to drive the sliding block to move in a direction away from the first bottom wall. The movable template is provided with two guide blocks, one of which is provided with a first inclined surface along the axial direction of the first adsorption hole, and the other guide block is provided with a second inclined surface along the axial direction of the second adsorption hole. The two sliding blocks are respectively provided with a third inclined surface and a fourth inclined surface. When the mold is closed, the first inclined surface is in contact with the third inclined surface, and the second inclined surface is in contact with the fourth inclined surface, and the two guide blocks press the two sliding blocks against the top walls of the two first slide grooves respectively.

[0006] By adopting the above technical solution, after the injection molding of the mold is completed, the lower mold body will move away from the upper mold body under the action of the injection molding machine. During this process, the two guide blocks gradually no longer press the two sliding blocks. Under the action of the two driving parts, the two sliding blocks will slide away from the top walls of the two first sliding grooves. At this time, under the limiting guidance of the two guide blocks, the movement path of the two sliding blocks for the left decorative panel and the right decorative panel is that the two sliding blocks move along the axial direction of the first adsorption hole and the axial direction of the second adsorption hole respectively away from the injection molded left decorative panel and right decorative panel, so that the two sliding blocks release the inverted structure of the left decorative panel and the right decorative panel, so that the two decorative panels can be demolded.

[0007] Preferably, mounting holes are provided on the top walls of the two sliding blocks, the driving part is a nitrogen cylinder arranged in the mounting hole, the output shaft of the nitrogen cylinder conflicts with the bottom wall of the corresponding first slide groove, the output shaft of the nitrogen cylinder is always in a compressed state, and the axial direction of the nitrogen cylinder is parallel to the inclination direction of the corresponding first slide groove.

[0008] By adopting the above technical solution, the arrangement of the nitrogen cylinder can provide power for the movement of the sliding block, and at the same time, the driving structure of the nitrogen cylinder has low manufacturing difficulty and low manufacturing cost.

[0009] Preferably, a receiving hole is provided on the bottom wall of the two first chutes along the axial direction of the output shaft of the nitrogen cylinder on the same side, the output shaft of the nitrogen cylinder is located in the receiving hole, and the end face of the output shaft of the nitrogen cylinder always conflicts with the bottom face of the receiving hole.

[0010] By adopting the above technical solution, the contact area between the output shaft of the nitrogen cylinder and the fixed template is guaranteed, thereby ensuring the service life of the output shaft of the nitrogen cylinder and the effect of the force on the sliding block.

[0011] Preferably, each of the sliding blocks is provided with two nitrogen cylinders, and the two nitrogen cylinders located on the same sliding block are respectively close to the two side ends of the sliding block.

[0012] By adopting the above technical solution, the sliding block is longer, and the provision of two nitrogen cylinders can improve the stability of the sliding block during movement.

[0013] Preferably, each of the first slide grooves is provided with two guide rods, each of the sliding blocks is provided with two guide holes for sliding connection with the guide rods, the axial direction of each guide rod is parallel to the axial direction of the output shaft of the adjacent nitrogen cylinder, and the two guide rods located on the same side are respectively located on both sides of the two nitrogen cylinders on the same side.

[0014] By adopting the above technical solution, the moving direction of the sliding block is further limited, thereby ensuring the accuracy of the moving direction of the sliding block.

[0015] Preferably, the groove openings of the two first slide grooves are both provided with stop blocks, and the second slide grooves are opened along the depth direction of the corresponding first slide grooves on the sides of the two sliding blocks away from each other, and the ends of the stop blocks are slidably connected in the first slide grooves, and when the mold is in the mold opening state, the stop blocks are in conflict with the top wall of the second slide groove.

[0016] By adopting the above technical solution, the initial position of the sliding block is limited to ensure that the first inclined surface can conflict with the third inclined surface and the second inclined surface can conflict with the fourth inclined surface when the mold is closed, thereby ensuring the guiding effect of the limit block on the sliding block.

[0017] Preferably, two side walls of the first sliding grooves that are away from each other are each provided with a receiving groove, a first threaded hole is each provided on the top wall of the receiving groove, the stopper is located in the receiving groove, and a bolt for cooperating with the first threaded hole is provided on the stopper.

[0018] By adopting the above technical solution, the sliding block will collide with the mounting block every time the mold is opened, causing the mounting block to wear. After the mold is injected tens of thousands of times, a new mounting block needs to be replaced. The above structure makes the installation and disassembly of the block very convenient, thereby facilitating the subsequent maintenance of the sliding block and the replacement of the block.

[0019] Preferably, the two sliding blocks are each provided with a second threaded hole, and the bottom walls of the two first sliding grooves are each provided with a third threaded hole. When the two sliding blocks collide with the bottom walls of the two first sliding grooves, the second threaded hole is connected to the third threaded hole.

[0020] By adopting the above technical solution, when the mold is hoisted or transported, the two sliding blocks are fixed and limited by using bolts to be threaded in the second threaded hole and the third threaded hole respectively, thereby preventing the contact surfaces between the two sliding blocks and the two guide blocks from wearing.

[0021] The technical effects of this utility model are mainly reflected in the following aspects:

[0022] 1. The utility model cooperates with the driving part and the guide block so that when the mold is opened, the two sliding blocks automatically move to release the undercut structure with the left decorative plate and the right decorative plate;

[0023] 2. The utility model uses a nitrogen cylinder as the driving part, which has good driving effect and is easy to install;

[0024] 3. The utility model limits the positions of the two sliding blocks when the mold is opened by the cooperation of the nitrogen cylinder and the stopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the left trim panel and the right trim panel.

[0026] Figure 2 This is a cross-sectional view of the left and right trim panels along line AA.

[0027] Figure 3 It is a schematic diagram of the structure of the mold when the mold is closed.

[0028] Figure 4 yes Figure 3 Cross-sectional view of the middle mold along line BB.

[0029] Figure 5 yes Figure 3 Schematic diagram of the structure of the middle and lower mold parts.

[0030] Figure 6 yes Figure 3 Schematic diagram of the structure of the middle and upper mold body without a set of sliding blocks and related components.

[0031] Figure 7 yes Figure 6 Cross-sectional view of the middle and upper mold body along the CC line.

[0032] Figure 8 yes Figure 6 Cross-sectional view of the middle and upper mold body along line DD.

[0033] Fig. 9 yes Figure 6 Schematic diagram of the structure of the middle sliding block and two nitrogen cylinders.

[0034] 1. The upper mold body; 11. The upper fixed plate; 12. The hot runner plate; 13. The fixed mold plate; 131. The first slide groove; 132. The receiving hole; 133. The receiving groove; 134. The first threaded hole; 135. The third threaded hole; 2. The lower mold body; 21. The lower fixed plate; 22. The mold foot; 23. The top plate; 24. The ejection mechanism; 25. The movable mold plate; 3. The sliding block; 31. The third inclined plane; 32. The fourth inclined plane; 33. The mounting hole; 34. The guide hole; 35. The second slide groove; 36. The second threaded hole; 4. The driving part; 41. The nitrogen cylinder; 5. The guide block; 51. The first inclined plane; 52. The second inclined plane; 6. The guide rod; 7. The stopper; 8. The left decorative plate; 81. The first adsorption hole; 9. The right decorative plate; 92. The second adsorption hole. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings to make the technical solution of the present application easier to understand and grasp.

[0036] Reference Figure 3 and Figure 4The present embodiment is a mold cavity block structure of an injection mold for a plastic part of an automobile door upper trim panel, comprising an upper mold body 1 and a lower mold body 2, wherein the upper mold body 1 comprises an upper fixed plate 11, a hot runner plate 12 fixed on a lower fixed plate 21, and a fixed mold plate 13 fixed on the hot runner plate 12, and the lower mold body 2 comprises a lower fixed plate 21, two mold feet 22 fixed on the left and right sides of the lower fixed plate 21, a movable mold plate 25 fixed on the top of the two mold feet 22, two top plates 23 slidably connected between the movable mold plate 25 and the lower fixed plate 21, and an ejection mechanism 24 installed on the two top plates 23.

[0037] Reference Figure 3 , Figure 4 , Figure 6 and Fig. 9 , and the fixed template 13 is provided with two first slide grooves 131, the distance between the two first slide grooves 131 gradually decreases from the end close to the movable template 25 to the end far from the movable template 25, and the two first slide grooves 131 are slidably connected with the slide blocks 3, and the two slide blocks 3 are respectively used to form the side walls of the left decorative plate 8 and the side walls of the right decorative plate 9. Two guide rods 6 are arranged in each first slide groove 131, and the two guide rods 6 of each first slide groove 131 are respectively located at the two ends of the first slide groove 131, and the axial direction of the guide rod 6 in each first slide groove 131 is parallel to the inclination direction of the corresponding first slide groove 131. Two guide holes 34 for sliding connection with the guide rods 6 are provided on each slide block 3.

[0038] Reference Figure 3 , Figure 4 , Figure 6 and Fig. 9 In the figure, three second threaded holes 36 are opened on the two sliding blocks 3 along the mold opening direction of the mold, and three third threaded holes 135 are opened on the bottom walls of the two first sliding grooves 131 along the mold opening direction of the mold. When the two sliding blocks 3 conflict with the bottom walls of the two first sliding grooves 131, the six second threaded holes 36 are connected to the six third threaded holes 135.

[0039] Reference Figure 3 , Figure 6 , Figure 7 and Fig. 9, two mounting holes 33 are provided on the top walls of the two sliding blocks 3 along the axial direction of the guide rod 6 located in the same first slide groove 131, the two mounting holes 33 on each sliding block 3 are respectively located between the two guide holes 34, and the two mounting holes 33 of each sliding block 3 are respectively close to the two side ends of each. A driving part 4 is provided on the two sliding blocks 3, and the driving part 4 is used to drive the sliding blocks 3 to move in the direction away from the top wall of the first slide groove 131. The driving part 4 is two nitrogen cylinders 41 fixedly connected to the two mounting holes 33 of the same sliding block 3 by bolts. Two receiving holes 132 are provided on the bottom walls of the two first slide grooves 131 along the axial direction of the output shaft of the nitrogen cylinder 41 on the same side, and the end faces of the output shafts of the four nitrogen cylinders 41 always conflict with the bottom faces of the four receiving holes 132.

[0040] Reference Figure 3 , Figure 6 , Figure 8 , and two receiving grooves 133 are provided on the side walls away from the two first slide grooves 131, and a first threaded hole 134 is provided on the top wall of each receiving groove 133, and a block 7 is fixedly connected in each receiving groove 133 by bolts. Two second slide grooves 35 are provided on the side away from each other of the two sliding blocks 3 along the depth direction of the corresponding first slide grooves 131, and the ends of the four block blocks 7 are respectively slidably connected in the four second slide grooves 35. When the mold is in the mold opening state, the four nitrogen springs push the two sliding blocks 3 away from the top walls of the two first slide grooves 131 so that the four block blocks 7 conflict with the top walls of the four second slide grooves 35.

[0041] Reference Figure 3-Figure 5 Two guide blocks 5 are fixed on the movable template 25, one of which is provided with a first inclined surface 51 along the axial direction of the first adsorption hole 81, and the other is provided with a second inclined surface 52 along the axial direction of the second adsorption hole 92. The bottom surfaces of the two sliding blocks 3 are respectively provided with a third inclined surface 31 and a fourth inclined surface 32. When the mold is closed, the first inclined surface 51 is in contact with the third inclined surface 31, and the second inclined surface 52 is in contact with the fourth inclined surface 32. The two guide blocks 5 press the two sliding blocks 3 against the top walls of the two first slide grooves 131 respectively.

[0042] The specific injection molding process of the mold in this embodiment:

[0043] First, the mold is hoisted onto the injection molding machine through a gantry crane, and then the injection molding machine separates the upper mold body 1 and the lower mold body 2. Next, the bolts installed between the six second threaded holes 36 and the six third threaded holes 135 are removed. Without the limitation of the bolts, under the action of the four nitrogen cylinders 41, the two sliding blocks 3 move away from the top walls of the two first slide grooves 131 and collide with the four stop blocks 7.

[0044] Then the injection molding machine controls the lower mold body 2 to move toward the upper mold body 1. During this process, the first inclined surface 51 will conflict with the third inclined surface 31, and the second inclined surface 52 will conflict with the fourth inclined surface 32, and push the two sliding blocks 3 to move toward the top walls of the two first slide grooves 131. During the movement of the two sliding blocks 3, the four nitrogen cylinders 41 will be compressed, and finally the two guide blocks 5 will press the two sliding blocks 3 against the top walls of the two first slide grooves 131. Then the injection molding machine starts to inject plastic into the mold to form the left decorative plate 8 and the right decorative plate 9.

[0045] After the two decorative panels are injection molded, the mold controls the lower mold body 2 to move away from the upper mold body 1. During this process, the two guide blocks 5 gradually stop pressing the two sliding blocks 3. Under the action of the four nitrogen cylinders 41, the two sliding blocks 3 will slide away from the top walls of the two first slide grooves 131. At this time, under the limiting guidance of the two guide blocks 5, the movement path of the two sliding blocks 3 for the left decorative panel 8 and the right decorative panel 9 is that the two sliding blocks 3 move along the axial direction of the first adsorption hole 81 and the axial direction of the second adsorption hole 92 respectively away from the injection molded left decorative panel 8 and the right decorative panel 9, so that the two sliding blocks 3 release the inverted structure of the left decorative panel 8 and the right decorative panel 9, so that the left decorative panel 8 and the right decorative panel 9 can be demolded smoothly.

[0046] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A mold cavity block structure of an injection mold for a plastic part of an automobile door upper trim panel, comprising an upper mold body (1) and a lower mold body (2), wherein the upper mold body (1) comprises an upper fixed plate (11), a hot runner plate (12), and a fixed mold plate (13), and the lower mold body (2) comprises a lower fixed plate (21), two mold feet (22), two top plates (23), an ejection mechanism (24) provided on the two top plates (23), and a movable mold plate (25), characterized in that: The fixed template (13) is provided with two first slide grooves (131), and the distance between the two first slide grooves (131) gradually decreases from the end close to the movable template (25) to the end far away from the movable template (25). The two first slide grooves (131) are both slidably connected with slide blocks (3), and the two slide blocks (3) are respectively used to form the side wall of the left decorative plate (8) and the side wall of the right decorative plate (9). The two slide blocks (3) are both provided with a driving part (4), and the driving part (4) is used to drive the slide block (3) to move in a direction away from the top wall of the first slide groove (131). The movable template (25) Two guide blocks (5) are arranged on the top, one of which is provided with a first inclined surface (51) along the axial direction of the first adsorption hole (81), and the other guide block (5) is provided with a second inclined surface (52) along the axial direction of the second adsorption hole (92). The two sliding blocks (3) are provided with a third inclined surface (31) and a fourth inclined surface (32) respectively. When the mold is closed, the first inclined surface (51) is fitted with the third inclined surface (31), and the second inclined surface (52) is fitted with the fourth inclined surface (32). The two guide blocks (5) press the two sliding blocks (3) against the top walls of the two first slide grooves (131) respectively.

2. The mold cavity elastic block structure of the automobile door upper trim plastic part injection mold according to claim 1, characterized in that: The top walls of the two sliding blocks (3) are both provided with mounting holes (33); the driving part (4) is a nitrogen cylinder (41) arranged in the mounting hole (33); the output shaft of the nitrogen cylinder (41) abuts against the bottom wall of the corresponding first slide groove (131); the output shaft of the nitrogen cylinder (41) is always in a compressed state; and the axial direction of the output shaft of the nitrogen cylinder (41) is parallel to the inclination direction of the corresponding first slide groove (131).

3. The mold cavity elastic block structure of the automobile door upper trim plastic part injection mold according to claim 2, characterized in that: A receiving hole (132) is provided on the bottom wall of the two first slide grooves (131) along the axial direction of the output shaft of the nitrogen cylinder (41) on the same side. The output shaft of the nitrogen cylinder (41) is located in the receiving hole (132), and the end surface of the output shaft of the nitrogen cylinder (41) always contacts the bottom surface of the receiving hole (132).

4. The mold cavity elastic block structure of the automobile door upper trim plastic part injection mold according to claim 2, characterized in that: Two nitrogen cylinders (41) are provided on each sliding block (3), and the two nitrogen cylinders (41) located on the same sliding block (3) are respectively close to the two side ends of the sliding block (3).

5. The mold cavity elastic block structure of the injection mold for the plastic part of the upper door trim of an automobile according to claim 4, characterized in that: Two guide rods (6) are arranged in each of the first slide grooves (131), and two guide holes (34) for slidingly connecting with the guide rods (6) are arranged on each of the sliding blocks (3). The axial direction of each of the guide rods (6) is parallel to the axial direction of the output shaft of the adjacent nitrogen cylinder (41), and the two guide rods (6) located on the same side are respectively located on both sides of the two nitrogen cylinders (41) on the same side.

6. The mold cavity elastic block structure of the automobile door upper trim plastic part injection mold according to claim 1, characterized in that: The notches of the two first slide grooves (131) are each provided with a stopper (7); a second slide groove (35) is provided on a surface of the two sliding blocks (3) that is away from each other along the depth direction of the corresponding first slide groove (131); the end of the stopper (7) is slidably connected in the second slide groove (35); when the mold is in an open mold state, the stopper (7) contacts the top wall of the second slide groove (35).

7. The mold cavity elastic block structure of the automobile door upper trim plastic part injection mold according to claim 6, characterized in that: A receiving groove (133) is provided on the side walls of the two first sliding grooves (131) which are away from each other, a first threaded hole (134) is provided on the top wall of the receiving groove (133), the stopper (7) is located in the receiving groove (133), and a bolt for cooperating with the first threaded hole (134) is provided on the stopper (7).

8. The mold cavity elastic block structure of the automobile door upper trim plastic part injection mold according to claim 1, characterized in that: The two sliding blocks (3) are each provided with a second threaded hole (36), and the bottom walls of the two first sliding grooves (131) are each provided with a third threaded hole (135). When the two sliding blocks (3) collide with the bottom walls of the two first sliding grooves (131), the second threaded hole (36) is connected to the third threaded hole (135).

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