High-stability demolding structure of automobile inner door plate injection mold

Abstract

The application relates to a high-stability demolding structure of an automobile inner door plate injection mold, which comprises a movable mold plate, a first demolding mechanism, a forming block with a forming surface, an oblique rod, a straight rod and a driving piece, the straight rod is arranged through the movable mold plate and is slidably connected to the movable mold plate, a plurality of guide blocks are arranged on the straight rod and are uniformly distributed along the length direction of the straight rod, the forming block is fixedly connected to the oblique rod, the oblique rod is arranged through the movable mold plate and is slidably connected to the movable mold plate, a plurality of guide grooves are formed in the oblique rod, the plurality of guide blocks can slide in the corresponding guide grooves respectively, the driving piece is used for driving the movement of the straight rod, when the mold is opened, the driving piece drives the straight rod to slide towards one side of the movable mold plate, the guide blocks on the straight rod move and sequentially slide into the corresponding guide grooves on the oblique rod, and through the cooperation of the guide blocks and the guide grooves, the straight movement is converted into the oblique movement, so that the forming block can be accurately demolded along the product slope.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to a high-stability demolding structure of an injection mold for an automotive interior door panel. BACKGROUND

[0002] The demolding structure of an injection mold is a crucial component in mold design, which functions to smoothly and completely separate the plastic part from the mold cavity or core after the plastic part is formed, while ensuring that the plastic part is not deformed or damaged and achieving automatic production. The design of the demolding structure needs to be determined comprehensively according to the shape, size, material properties and production requirements of the plastic part, and directly affects the product quality and production efficiency.

[0003] REFERENCE Figures 12-14 is a schematic diagram of part of the structure of an automotive interior door panel, which has a plurality of different undercut structures, such as Figure 11 the undercut structure with a groove and a slope shown in FIG. 1B, Figure 12 the undercut structures in different directions on the same protruding part shown in FIG. 1C.

[0004] In the mold opening structure of the prior art, secondary demolding is usually required to achieve the demolding of the above-mentioned structures and complete the demolding of such undercuts, but secondary demolding requires an additional "sequence control mechanism" to realize the orderly connection of the two ejection actions, and the additional mechanism requires more installation space inside the mold, which may lead to an increase in the size of the mold, a higher requirement for the mold capacity of the injection molding machine, and an increase in the difficulty of equipment adaptation. Moreover, it will prolong the demolding time of a single cycle SUMMARY

[0005] In order to facilitate the demolding of the automotive interior door panel, the present application provides a high-stability demolding structure of an injection mold for an automotive interior door panel.

[0006] The high-stability demolding structure of an injection mold for an automotive interior door panel provided by the present application adopts the following technical solution:

[0007] The utility model provides a kind of high-stability demoulding structure of automobile inner door panel injection mold, including movable die plate, further include the first demoulding mechanism for the demoulding of inverted buckle structure in groove with inclined plane, the first demoulding mechanism includes forming block with forming surface, oblique rod, straight rod and driving part, the other end of the straight rod is connected on movable die plate and slides along its length direction, a plurality of guide blocks are provided on the straight rod, a plurality of the guide blocks are evenly distributed along the length direction of straight rod, the forming block is fixedly connected on oblique rod, the oblique rod is connected on movable die plate and slides along inclined to opening direction, a plurality of guide slots are provided on the oblique rod, a plurality of the guide slots correspond to a plurality of guide blocks respectively, and a plurality of the guide blocks can be slid in corresponding guide slot respectively, and the driving part is used to drive the movement of straight rod, when mold opens, straight rod slides towards movable die plate side, a plurality of guide blocks are sequentially slid into corresponding guide slot, so that oblique rod moves along product inclined plane relative to product.

[0008] By adopting the above technical scheme, when the mold is opened, the driving part drives the straight rod to slide towards the movable die plate side. The guide blocks on the straight rod move accordingly and sequentially slide into the corresponding guide slots on the oblique rod. Due to the matching relationship between the guide blocks and the guide slots, the straight movement of the straight rod is converted into the movement of the oblique rod along the product inclined plane relative to the product, which further drives the forming block to be demoulded from the inverted buckle structure in the groove with inclined plane. By matching the guide blocks with the guide slots, the straight movement is converted into the oblique movement, so that the forming block can be accurately demoulded along the product inclined plane. The product damage caused by forced demoulding in the prior art and the large size of the secondary demoulding mold and the long demoulding cycle are solved. The stability and success rate of demoulding are improved, and the quality of the product is ensured.

[0009] Preferably, the inclined directions of a plurality of the guide blocks and a plurality of the guide slots are parallel to the product inclined plane after forming.

[0010] By adopting the above technical scheme, the sliding direction of the guide blocks in the guide slots is parallel to the product inclined plane, which ensures that the movement trajectories of the oblique rod and the forming block are completely consistent with the product inclined plane. The relative movement between the forming block and the product inclined plane during demoulding is more stable, which reduces the friction and extrusion therebetween, thereby reducing the possibility of scratches, deformation and other defects on the product surface, and further ensuring the forming quality of the product.

[0011] Preferably, the driving part is a ejector plate, the ejector plate is slidably connected on movable die plate, and one end of the straight rod is fixedly connected on the ejector plate.

[0012] By adopting the technical scheme, the ejector plate is used as the driving member to drive the straight rod to move, the original ejector plate driving system in the injection mold is fully utilized, no additional driving device is needed, the overall structure of the mold is simplified, and the manufacturing cost and maintenance difficulty of the mold are reduced. Meanwhile, the sliding of the ejector plate has high stability and precision, can provide stable and reliable driving force for the straight rod, and ensures the normal work of the first demolding mechanism.

[0013] Preferably, the second demolding mechanism for demolding the undercut structure in different directions on the protruding part comprises a plurality of side ejecting blocks with shaped surfaces, a first screw rod, a first rotating cylinder and a plurality of inclined rods, one end of the first screw rod is fixedly connected to the ejector plate, the other end of the first screw rod is coaxially and threadedly connected to the first rotating cylinder, the first rotating cylinder is rotationally connected to the movable die plate, the outer side of the first rotating cylinder is provided with threads, the plurality of side ejecting blocks correspond to the plurality of inclined rods respectively, the plurality of side ejecting blocks are fixedly connected to the corresponding inclined rods respectively, the plurality of inclined rods are respectively provided with helical grooves, the plurality of helical grooves are uniformly distributed on the inclined rods along the axis direction of the first rotating cylinder, and the plurality of helical grooves can be matched with the threads on the outer side of the first rotating cylinder respectively.

[0014] By adopting the technical scheme, when the ejector plate moves, the first screw rod fixedly connected to the ejector plate moves together. The first screw rod is threadedly connected to the first rotating cylinder, and the movement of the first screw rod drives the first rotating cylinder to rotate. When the first rotating cylinder rotates, the threads on the outer side of the first rotating cylinder are matched with the helical grooves on the inclined rods, so that the threads drive the inclined rods to move, and then drive the side ejecting blocks to be pulled out from the undercut structure in different directions on the protruding part, and demolding is completed; the linear motion of the ejector plate is converted into multidirectional side pulling motion of the side ejecting blocks, the undercut on the protruding part can be smoothly pulled out from different directions, the possibility of damage to the protruding part during demolding is reduced, and the qualified rate of products is improved.

[0015] Preferably, a plurality of second rotating cylinders are rotationally connected to the movable die plate, some of the second rotating cylinders are coaxially and fixedly connected with first gears, the plurality of first gears are meshingly connected with each other, a plurality of inclined ejector rods are slidably connected to the movable die plate along the direction inclined to the mold opening direction, and the plurality of inclined ejector rods pass through the movable die plate respectively, the plurality of inclined ejector rods are threadedly connected with the plurality of second rotating cylinders respectively, a second screw rod is fixedly connected to the ejector plate, and the second screw rod passes through and is threadedly connected to any second rotating cylinder.

[0016] By adopting the above technical scheme, when the ejector plate moves, the second screw rod is driven to move. The second screw rod is threadedly connected with a second rotating drum, and drives the second rotating drum to rotate. Since the first gears on part of the second rotating drums are meshed with each other, the rotation of one second rotating drum drives other second rotating drums to rotate together. When the second rotating drum rotates, it is threadedly connected with the inclined ejector rod, and drives the inclined ejector rod to slide in a direction inclined to the mold opening direction, thereby achieving inclined ejection demolding of the product. Through the second screw rod, the second rotating drum and the meshed first gears, linkage control of multiple inclined ejector rods is achieved. The multiple inclined ejector rods can eject the product from different directions, which is suitable for processing more complex undercut structures or scenarios requiring multi-directional ejection, thereby improving the versatility and demolding effect of the mold. The meshed gears ensure the synchronization and coordination of the movement of the inclined ejector rods, thereby avoiding product damage caused by inconsistent movement of the components.

[0017] Preferably, the inclined sliding rod, the cam, the limiting block and the linkage assembly are further included. The cam is rotationally connected to the movable die plate. A sliding groove is formed on the circumferential side of the cam. The limiting block is slidingly connected to the movable die plate in a direction perpendicular to the mold opening direction. One end of the limiting block is slidingly connected to the sliding groove along the contour of the cam. The inclined sliding rod passes through the limiting block and the movable die plate and is slidingly connected to the limiting block in an inclined manner. One end of the inclined sliding rod is slidingly connected to the ejector plate along the sliding direction of the limiting block. When the second rotating drum rotates, the linkage assembly drives the cam to rotate together. During the mold opening process, the cam drives the limiting block to slide away from the cam.

[0018] By adopting the above technical scheme, when the second rotating drum rotates, the linkage assembly synchronously drives the cam to rotate. The cam cooperates with the limiting block through the sliding groove on the circumferential side of the cam, and accurately controls the limiting block to slide away from the cam in a direction perpendicular to the mold opening direction during the mold opening process. The sliding of the limiting block provides additional driving force for the inclined sliding rod, which superimposes the power of the original driving system, significantly improves the speed of the inclined rod to separate from the undercut, and shortens the demolding time. For structures with deep undercuts or strong holding force, the auxiliary thrust of the limiting block can help the inclined sliding rod overcome greater resistance and avoid demolding jamming caused by insufficient power.

[0019] Preferably, the linkage assembly includes a rotating rod and a second gear. The second gear is coaxially and fixedly connected to the cam. The rotating rod is rotationally connected to the movable die plate. Two meshing gears are coaxially and fixedly connected to the rotating rod. The diameters of the two meshing gears are different. The two meshing gears are respectively meshingly connected with the first gear and the second gear.

[0020] By adopting the technical scheme, when the second rotating drum rotates, the first gear connected with the second rotating drum rotates.

[0021] Preferably, the inclined stripper and the pull block are further included, the pull block is slidably connected to the movable die plate along the axis direction of the second rotating drum, a threaded rod is arranged on the pull block, the threaded rod is coaxially and threadedly connected to the second rotating drum, the inclined stripper is slidably connected to the movable die plate along the direction inclined to the opening direction of the mold, and the inclined stripper is slidably connected to the pull block along the direction perpendicular to the axis direction of the second rotating drum, and a forming surface for forming an inclined hole is arranged at the end of the inclined stripper away from the pull block.

[0022] By adopting the technical scheme, the ejector plate of the mold pushes the second screw rod forward, and drives the second rotating drum to rotate. The rotating second rotating drum drives the pull block to move linearly along the axis of the pull block through thread engagement. The linear motion of the pull block forces the inclined stripper to move obliquely along the inclined guide groove on the movable die plate, so that the inclined stripper is smoothly separated from the inclined hole formed thereby.

[0023] The technical effects of the present application mainly embody in the following aspects:

[0024] 1. The present application converts the straight motion into oblique motion by the cooperation of the guide block on the straight rod and the guide groove on the inclined rod, so that the forming block can be accurately demolded along the product inclined surface, solves the product damage caused by forced demolding in the prior art, and the large size of the secondary demolding mold and the long demolding cycle, improves the stability and success rate of demolding, and ensures the quality of the product.

[0025] 2. The first screw rod is threadedly connected with the first rotating drum, and the movement of the first screw rod drives the first rotating drum to rotate. When the first rotating drum rotates, the threads on the outer side of the first rotating drum are matched with the first inclined rod screw groove, so that the first rotating drum drives the inclined rod to move, and in turn drives the side pulling block to be pulled out from the different direction inverted buckle structure of the protruding part, and the demolding is completed. The linear motion of the ejector plate is converted into the multi-directional side pulling motion of the side pulling block, which can smoothly pull out the inverted buckle on the protruding part from different directions, reduces the possibility of damage to the protruding part during demolding, and improves the qualified rate of the product.

[0026] 3、The present application is provided with cam and limit block, when the second rotating drum rotates, linkage assembly synchronous drive cam rotation, cam utilizes its circumferential side groove and limit block cooperation, in the mold opening process accurate control limit block along the direction perpendicular to the mold opening side away from the cam sliding; the sliding of the limit block provides additional driving force for the inclined rod, superimposed the power of the original driving system, significantly improve the speed of the inclined rod out of the reverse buckle, shorten the demolding time, for the reverse buckle deeper or more tightly structure, the auxiliary thrust of the limit block can help the inclined sliding rod to overcome greater resistance, avoid the demolding jam caused by insufficient power. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the mold part structure schematic diagram of the embodiment of the application.

[0028] Figure 2 is the structure schematic diagram of the state when the mold is closed of the embodiment of the application.

[0029] Figure 3 is the structure schematic diagram of the state after the mold is opened of the embodiment of the application.

[0030] Figure 4 is the ejector plate part structure schematic diagram of the embodiment of the application.

[0031] Figure 5 is the structure schematic diagram of the state when the mold is closed of the first demolding mechanism of the embodiment of the application.

[0032] Figure 6 is the structure schematic diagram of the state when the mold is opened of the first demolding mechanism of the embodiment of the application.

[0033] Figure 7 is the assembly structure schematic diagram of the first rotating drum of the embodiment of the application.

[0034] Figure 8 is the structure schematic diagram of the state when the mold is closed of the second demolding mechanism of the embodiment of the application.

[0035] Figure 9 is the structure schematic diagram of the state when the mold is opened of the second demolding mechanism of the embodiment of the application.

[0036] Figure 10 is the assembly structure schematic diagram of the cam and the pull block of the embodiment of the application.

[0037] Figure 11 is the internal structure schematic diagram of the second rotating drum of the embodiment of the application.

[0038] Figure 12 is the product part structure schematic diagram of the embodiment of the application.

[0039] Figure 13 is the enlarged view along Figure 12 A in the figure.

[0040] Figure 14 is along Figure 12 is an enlarged view at B in the middle.

[0041] BRIEF DESCRIPTION OF DRAWINGS 1, movable die plate; 2, first demolding mechanism; 3, forming block; 4, oblique rod; 5, straight rod; 6, driving piece; 7, guide block; 8, guide groove; 9, ejector plate; 10, second demolding mechanism; 11, side pulling block; 12, first screw rod; 13, first rotating drum; 14, oblique rod; 15, helical groove; 17, second rotating drum; 18, first gear; 19, oblique ejector rod; 20, second screw rod; 21, cam; 22, limiting block; 23, linkage assembly; 24, sliding groove; 25, rotating rod; 26, second gear; 27, meshing gear; 28, oblique sliding rod; 29, oblique pulling block; 30, pulling block; 31, threaded rod. DETAILED DESCRIPTION

[0042] The following will be described in detail in combination with the accompanying Figures 1-12 The application is further described in detail to make the technical scheme of the application easier to understand and master.

[0043] The application discloses a high-stability demolding structure of an automobile inner door plate injection mold.

[0044] Referring to Figure 1 and Figure 4 A high-stability demolding structure of an automobile inner door plate injection mold, comprising a movable die plate 1, further comprising a first demolding mechanism 2 for demolding a undercut structure in a groove with an inclined surface and a second demolding mechanism 10 for demolding different direction undercut structures on a protruding part.

[0045] Referring to Figure 6 and Figure 7 The first demolding mechanism 2 comprises a forming block 3 with a forming surface, an oblique rod 4, a straight rod 5 and a driving piece 6. The other end of the straight rod 5 is arranged through the movable die plate 1 and is slidably connected to the movable die plate 1 along the length direction of the movable die plate 1. A plurality of guide blocks 7 are arranged on the straight rod 5 and are evenly distributed along the length direction of the straight rod 5. The forming block 3 is fixedly connected to the oblique rod 4. The oblique rod 4 is arranged through the movable die plate 1 and is slidably connected to the movable die plate 1 along the direction inclined to the opening direction of the mold. A plurality of guide grooves 8 are arranged on the oblique rod 4 and correspond to the plurality of guide blocks 7 respectively. The plurality of guide blocks 7 can be slid in the corresponding guide grooves 8 respectively. The inclined directions of the plurality of guide blocks 7 and the plurality of guide grooves 8 are parallel to the inclined surface of the product after forming. The driving piece 6 is used for driving the movement of the straight rod 5. During the opening process of the mold, the straight rod 5 slides to the side of the movable die plate 1. The plurality of guide blocks 7 are sequentially slid into the corresponding guide grooves 8, so that the oblique rod 4 moves along the inclined surface of the product relative to the product.

[0046] Referring to Figure 6 and Figure 7When the mold is opened, the driving member 6 drives the straight rod 5 to slide towards the side of the movable mold plate 1. The guide block 7 on the straight rod 5 moves accordingly and slides into the corresponding guide groove 8 on the inclined rod 4 in turn. Due to the matching relationship between the guide block 7 and the guide groove 8, the straight movement of the straight rod 5 is converted into the movement of the inclined rod 4 relative to the product along the inclined surface of the product, thereby driving the forming block 3 to be detached from the undercut structure in the groove with the inclined surface. Through the cooperation of the guide block 7 and the guide groove 8, the straight movement is converted into the inclined movement, so that the forming block 3 can be accurately demolded along the inclined surface of the product, solving the problems of product damage caused by forced demolding in the prior art and large size of secondary demolding mold and long demolding cycle, improving the stability and success rate of demolding and ensuring the quality of the product.

[0047] With reference to Figure 5 and Figure 6 The sliding direction of the guide block 7 in the guide groove 8 is parallel to the inclined surface of the product, ensuring that the movement trajectories of the inclined rod 4 and the forming block 3 are completely consistent with the inclined surface of the product. The relative movement between the forming block 3 and the inclined surface of the product during demolding is more stable, reducing the friction and extrusion therebetween, thereby reducing the possibility of scratches, deformation and other defects on the surface of the product, and further ensuring the forming quality of the product.

[0048] With reference to Figure 2 and Figure 3 The driving member 6 is a ejector plate 9, the ejector plate 9 is slidably connected to the movable mold plate 1, and one end of the straight rod 5 is fixedly connected to the ejector plate 9. The ejector plate 9 is used as the driving member 6 to drive the straight rod 5 to move, fully utilizing the original ejector plate 9 driving system in the injection mold, without the need for additional driving devices, simplifying the overall structure of the mold and reducing the manufacturing cost and maintenance difficulty of the mold. At the same time, the sliding of the ejector plate 9 has high stability and precision, and can provide stable and reliable driving force for the straight rod 5, ensuring the normal work of the first demolding mechanism 2.

[0049] With reference to Figure 4 The second demolding mechanism 10 includes a plurality of side extraction blocks 11 with forming surfaces, a first screw rod 12, a first rotating cylinder 13 and a plurality of inclined rods 14. One end of the first screw rod 12 is fixedly connected to the ejector plate 9, and the other end of the first screw rod 12 is coaxially and threadedly connected to the first rotating cylinder 13. The first rotating cylinder 13 is rotatably connected to the movable mold plate 1, and the outer side of the first rotating cylinder 13 is provided with threads. The plurality of side extraction blocks 11 correspond to the plurality of inclined rods 14 respectively, and the plurality of side extraction blocks 11 are fixedly connected to the corresponding inclined rods 14 respectively. A plurality of helical grooves 15 are arranged on the plurality of inclined rods 14 respectively, and the plurality of helical grooves 15 are uniformly distributed along the axis direction of the first rotating cylinder 13. The plurality of helical grooves 15 can be matched with the threads on the outer side of the first rotating cylinder 13 respectively.

[0050] With reference to Figure 2 andFigure 3 When the ejector plate 9 moves, it drives the first screw rod 12 fixed thereon to move. The first screw rod 12 is threadedly connected with the first rotating cylinder 13, and its movement drives the first rotating cylinder 13 to rotate. When the first rotating cylinder 13 rotates, the threads on the outer side thereof cooperate with the screw grooves 15 on the inclined rod 14, so that the threads drive the inclined rod 14 to move, and in turn drive the side pulling block 11 to be pulled out from the undercut structure in different directions of the protruding part, completing the demolding; the linear motion of the ejector plate 9 is converted into the multidirectional side pulling motion of the side pulling block 11, which can smoothly pull out the undercut on the protruding part from different directions, reduces the possibility of damage to the protruding part during demolding, and improves the qualification rate of the product.

[0051] With reference to Figure 7 The second demolding mechanism 10 further includes a plurality of second rotating cylinders 17, the plurality of second rotating cylinders 17 are respectively rotationally connected to the movable die plate 1, a first gear 18 is coaxially and fixedly connected to part of the second rotating cylinders 17, the plurality of first gears 18 are meshingly connected with each other, a plurality of inclined ejector rods 19 are slidably connected to the movable die plate 1 along the direction inclined to the mold opening direction, and the plurality of inclined ejector rods 19 respectively pass through the movable die plate 1, the plurality of inclined ejector rods 19 are respectively threadedly connected with the plurality of second rotating cylinders 17, and a second screw rod 20 is fixedly connected to the ejector plate 9 and threadedly connected to any second rotating cylinder 17.

[0052] With reference to Figure 2 and Figure 3 When the ejector plate 9 moves, it drives the second screw rod 20 to move. The second screw rod 20 is threadedly connected with a certain second rotating cylinder 17, and drives the second rotating cylinder 17 to rotate. Since the first gears 18 on part of the second rotating cylinders 17 are meshingly connected with each other, the rotation of one second rotating cylinder 17 drives the other second rotating cylinders 17 to rotate together. When the second rotating cylinder 17 rotates, it is threadedly connected with the inclined ejector rod 19, and drives the inclined ejector rod 19 to slide along the direction inclined to the mold opening direction, realizing the oblique ejection demolding of the product. Through the second screw rod 20, the second rotating cylinder 17 and the meshingly connected first gears 18, the linkage control of the plurality of inclined ejector rods 19 is realized. The plurality of inclined ejector rods 19 can obliquely eject the product from different directions, which is suitable for processing more complex undercut structures or scenes requiring multidirectional ejection, and improves the versatility and demolding effect of the mold. The meshingly connected gears ensure the synchronism and coordination of the motion of the inclined ejector rods 19, avoiding the damage of the product caused by the inconsistent motion of the components.

[0053] With reference to Figure 8 and Figure 10The second demolding mechanism 10 further comprises an inclined sliding rod 28, a cam 21, a limiting block 22 and a linkage assembly 23. The cam 21 is rotationally connected to the movable mold plate 1. A sliding groove 24 is formed in the circumferential side of the cam 21. The limiting block 22 is slidingly connected to the movable mold plate 1 in a direction perpendicular to the mold opening direction. One end of the limiting block 22 is slidingly connected to the sliding groove 24 along the profile of the cam 21. The inclined sliding rod 28 penetrates the limiting block 22 and the movable mold plate 1 and is slidingly connected to the limiting block 22 in an inclined manner. One end of the inclined sliding rod 28 is slidingly connected to the ejector plate 9 along the sliding direction of the limiting block 22. When the second rotating cylinder 17 rotates, the linkage assembly 23 drives the cam 21 to rotate. During the mold opening process, the cam 21 drives the limiting block 22 to slide away from the cam 21.

[0054] With reference to Figure 4 When the second rotating cylinder 17 rotates, the linkage assembly 23 synchronously drives the cam 21 to rotate. The cam 21 cooperates with the limiting block 22 through the sliding groove 24 in the circumferential side of the cam 21 to accurately control the limiting block 22 to slide away from the cam 21 in a direction perpendicular to the mold opening direction during the mold opening process. The sliding of the limiting block 22 provides an additional driving force for the inclined sliding rod 28, which superimposes the power of the original driving system and significantly improves the speed of the inclined rod 14 to separate from the undercut. The auxiliary thrust of the limiting block 22 can help the inclined sliding rod 28 overcome greater resistance and avoid demolding jamming caused by insufficient power for structures with deeper undercuts or greater holding force.

[0055] With reference to Figure 8 and Figure 9 The linkage assembly 23 comprises a rotating rod 25 and a second gear 26. The second gear 26 is coaxially and fixedly connected to the cam 21. The rotating rod 25 is rotationally connected to the movable mold plate 1. Two meshing gears 27 are coaxially and fixedly connected to the rotating rod 25. The diameters of the two meshing gears 27 are different. The two meshing gears 27 are meshingly connected with the first gear 18 and the second gear 26, respectively.

[0056] With reference to Figure 8 and Figure 9 When the second rotating cylinder 17 rotates, it drives the first gear 18 connected thereto to rotate. The first gear 18 meshes with one of the meshing gears 27 on the rotating rod 25 to drive the rotating rod 25 to rotate. The other meshing gear 27 on the rotating rod 25 meshes with the second gear 26 on the cam 21, so that the rotation of the rotating rod 25 drives the second gear 26 and the cam 21 to rotate together. Due to the different diameters of the two meshing gears 27, the transmission ratio is adjusted, so that the rotation speed of the cam 21 adapts to the needs of demolding.

[0057] With reference to Figure 8 , Figure 9 and Figure 11Further comprising an inclined stripper 29 and a pulling block 30, the pulling block 30 is slidingly connected to the movable die plate 1 along the axis direction of the second rotary drum 17, the pulling block 30 is fixedly connected with a threaded rod 31, the threaded rod 31 is coaxially and threadedly connected to the second rotary drum 17, the inclined stripper 29 is slidingly connected to the movable die plate 1 along the direction of the mold opening, and the inclined stripper 29 is slidingly connected to the pulling block 30 along the direction perpendicular to the axis of the second rotary drum 17, and the end of the inclined stripper 29 away from the pulling block 30 is provided with a forming surface for forming an inclined hole. The ejector plate 9 pushes the second screw rod 20 forward to drive the second rotary drum 17 to rotate. The rotating second rotary drum 17 drives the pulling block 30 to move linearly along its axis through thread engagement. The linear motion of the pulling block 30 forces the inclined stripper 29 to move obliquely along the inclined guide groove on the movable die plate 1 through the sliding connection structure, so as to smoothly separate from the inclined hole formed thereby.

[0058] With reference to Figure 2 and Figure 3 , in summary, the mold stripping mechanism has the following stripping process:

[0059] During the mold opening process, the ejector plate 9 continuously drives the straight rod 5, the first screw rod 12 and the second screw rod 20 to move;

[0060] The first guide block 7 on the straight rod 5 slides into the corresponding guide groove 8 on the inclined rod 4, and the subsequent guide blocks 7 enter the corresponding guide grooves 8 in sequence as the straight rod 5 advances;

[0061] The first screw rod 12 drives the first rotary drum 13 to rotate through thread engagement; the thread on the outer side of the first rotary drum 13 engages with the helical groove 15 on the inclined rod 14 to convert the rotary motion into the side extraction motion of the inclined rod 14, and the side extraction block 11 is gradually extracted from the different direction undercut structures of the protruding part along with the inclined rod 14;

[0062] The second screw rod 20 drives the corresponding second rotary drum 17 to rotate through thread engagement, and all the second rotary drums 17 are synchronously rotated through the first gear 18 engaged with each other; the second rotary drum 17 drives the inclined ejector rod 19 to slide in the inclined direction through thread engagement, and the end of the inclined ejector rod 19 starts to push the product to assist the product to preliminarily separate from the mold cavity;

[0063] The second rotary drum 17 drives the linkage assembly 23 to act through rotation, and drives the cam 21 to rotate through the meshing gears 27 of different diameters on the rotating rod 25; the cam 21 cooperates with the end of the limiting block 22 through the circumferential sliding groove 24 to pull the limiting block 22 to slide in the vertical mold opening direction, and the limiting block 22 drives the inclined sliding rod 28 to move to provide additional thrust to the product;

[0064] The second rotary drum 17 rotates to drive the pulling block 30 to move through thread engagement, and the linear motion of the pulling block 30 forces the inclined stripper 29 to move obliquely along the inclined guide groove on the movable die plate 1 through the sliding connection structure, so as to smoothly separate from the inclined hole formed thereby.

[0065] Of course, the above merely illustrates typical embodiments of the present application, and the present application can have other various embodiments in addition thereto, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.

Claims

1. A high-stability demolding structure for an injection mold of an automotive interior door panel, comprising a moving template (1), characterized in that: It also includes a first demolding mechanism (2) for demolding the inverted structure with an inclined surface in the groove. The first demolding mechanism (2) includes a molding block (3) with a molding surface, an inclined rod (4), a straight rod (5), and a driving member (6). The other end of the straight rod (5) passes through the moving template (1) and is slidably connected to the moving template (1) along its length direction. Several guide blocks (7) are provided on the straight rod (5). The guide blocks (7) are evenly distributed along the length direction of the straight rod (5). The molding block (3) is fixedly connected to the inclined rod (4). The inclined rod (4) passes through the molding block (3) with an inclined surface in the groove. The moving template (1) is slidably connected to the moving template (1) along the inclined direction of mold opening. Several guide grooves (8) are provided on the inclined rod (4). Several guide grooves (8) correspond to several guide blocks (7) respectively, and several guide blocks (7) can slide in the corresponding guide grooves (8) respectively. The driving component (6) is used to drive the movement of the straight rod (5). When the mold is opened, the straight rod (5) slides towards the moving template (1) side, and several guide blocks (7) slide into the corresponding guide grooves (8) in sequence, so that the inclined rod (4) moves relative to the product along the inclined surface of the product. The driving component (6) is a ejector plate (9), which is slidably connected to the moving template (1), and one end of the straight rod (5) is fixedly connected to the ejector plate (9); It also includes a second demolding mechanism (10) for demolding the undercut structure in different directions on the protrusion. The second demolding mechanism (10) includes several side pull blocks (11) with forming surfaces, a first spiral rod (12), a first rotating cylinder (13) and several inclined rods (14). One end of the first spiral rod (12) is fixedly connected to the ejector plate (9), and the other end of the first spiral rod (12) is coaxially and threadedly connected to the first rotating cylinder (13). The first rotating cylinder (13) is rotatably connected to the moving template (1). The outer side of the first rotating cylinder (13) is provided with threads. Several side pull blocks (11) correspond to several inclined rods (14) respectively. Several side pull blocks (11) are fixedly connected to the corresponding inclined rods (14) respectively. Several inclined rods (14) are provided with spiral grooves (15) respectively. Several spiral grooves (15) are evenly distributed on the inclined rods (14) along the axial direction of the first rotating cylinder (13). Several spiral grooves (15) are threadedly engaged with the outer side of the first rotating cylinder (13) respectively. It also includes several second rotating cylinders (17), which are rotatably connected to the moving template (1). Some of the second rotating cylinders (17) are coaxially and fixedly connected to first gears (18). Several first gears (18) are meshed with each other. Several inclined ejector rods (19) are slidably connected to the moving template (1) along the direction of mold opening. Several inclined ejector rods (19) pass through the moving template (1). Several inclined ejector rods (19) are threadedly connected to several second rotating cylinders (17). A second spiral rod (20) is fixedly connected to the ejector plate (9). The second spiral rod (20) passes through and is threadedly connected to any of the second rotating cylinders (17). It also includes a slanted sliding rod (28), a cam (21), a limiting block (22), and a linkage assembly (23). The cam (21) is rotatably connected to the moving template (1). A groove (24) is provided on the circumferential side of the cam (21). The limiting block (22) is slidably connected to the moving template (1) along the mold opening direction perpendicular to the mold. One end of the limiting block (22) is slidably connected to the groove (24) along the contour of the cam (21). The slanted sliding rod (28) is rotatably connected to the moving template (1). 8) Simultaneously, the limiting block (22) and the moving template (1) are inserted and slidably connected to the limiting block (22). One end of the inclined sliding rod (28) is slidably connected to the ejector plate (9) along the sliding direction of the limiting block (22). When the second rotating cylinder (17) rotates, the linkage component (23) is used to drive the cam (21) to rotate together. During the mold opening process, the cam (21) drives the limiting block (22) to slide away from the cam (21).

2. A high-stability demolding structure for automotive interior door panel injection molds according to claim 1, characterized in that: The inclination direction of several guide blocks (7) and several guide grooves (8) is parallel to the inclined surface of the formed product.

3. A high-stability demolding structure for an automotive interior door panel injection mold according to claim 1, characterized in that: The linkage assembly (23) includes a rotating rod (25) and a second gear (26). The second gear (26) is coaxial and fixedly connected to the cam (21). The rotating rod (25) is rotatably connected to the moving template (1). Two meshing gears (27) are coaxial and fixedly connected to the rotating rod (25). The two meshing gears (27) have different diameters and are respectively meshed with the first gear (18) and the second gear (26).

4. A high-stability demolding structure for an automotive interior door panel injection mold according to claim 1, characterized in that: It also includes a slanted release block (29) and a pull block (30). The pull block (30) is slidably connected to the moving template (1) along the axial direction of the second rotating cylinder (17). The pull block (30) is provided with a threaded rod (31). The threaded rod (31) is coaxial and threadedly connected to the second rotating cylinder (17). The slanted release block (29) is slidably connected to the moving template (1) along the mold opening direction inclined to the mold. The slanted release block (29) is slidably connected to the pull block (30) along the axial direction perpendicular to the second rotating cylinder (17). The end of the slanted release block (29) away from the pull block (30) is provided with a forming surface for forming slanted holes.

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