Lamination mold opening driving mechanism

Abstract

The utility model discloses a laminated mold opening driving mechanism in the technical field of injection molds, and aims to solve the problems that a synchronous rack driving mechanism in the prior art has many defects and the like, the laminated mold opening driving mechanism comprises a pull rod and a swing rod, the pull rod comprises an upper mold pull rod and a lower mold pull rod, one end of the upper mold pull rod and one end of the lower mold pull rod are rotationally connected with the upper male mold foot and the lower male mold foot respectively, the other ends of the upper mold pull rod and the lower mold pull rod are rotationally connected with the two ends of the swing rod respectively, and the middle of the swing rod is rotationally connected with the hot runner plate; after the laminated mold base is driven by an injection machine to complete mold opening of the first parting surface, the lower mold pull rod can pull the swing rod to rotate so as to perform mold opening of the second parting surface, and meanwhile, the swing rod pulls the upper mold pull rod to rotate until the laminated mold base is completely opened. The driving laminated die is stable and reliable, the processing cost is low, and the installation and the maintenance are simple.

Description

Technical Field

[0001] The utility model relates to a stacked mold opening drive mechanism, belonging to the technical field of injection molds. Background Art

[0002] Some consumer products in life are in great demand, and usually require multiple sets of duplicate molds for production, which also requires more injection molding machines. In this way, the factory needs to increase hardware investment, and the product cost is also increased accordingly. For this reason, the design of stacked molds is widely used because its production efficiency exceeds that of ordinary single-sided molds.

[0003] The existing stacking mold uses a synchronous rack drive mechanism to realize mold opening. If the synchronous rack is purchased from outside, it is expensive. If this mechanism is processed in-house, it is necessary to invest in high-precision processing equipment to ensure the matching accuracy or outsource the processing, and the production cost is also very high.

[0004] And there are still some problems in the use of the synchronous rack drive mechanism. For example, if a tooth in the middle of the rack is damaged during production and use, it will cause unbalanced mold opening. Therefore, the maintenance cost in the later production process is also correspondingly high, and the installation is more complicated. The positioning groove processing accuracy is high, otherwise it is easy to cause unbalanced mold opening due to unbalanced installation. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a stacking mold opening drive mechanism, which can drive the stacking mold stably and reliably, has low processing cost, and is simple to install and maintain.

[0006] To achieve the above-mentioned purpose, the utility model is implemented by adopting the following technical scheme: a stacking mold opening drive mechanism, the stacking mold opening drive mechanism is arranged on the stacking mold frame, the stacking mold frame is connected to the injection molding machine driving, and comprises an upper male mold plate, a lower male mold plate and a middle mold plate, the two sides of the middle mold plate are respectively provided with an upper female mold plate and a lower female mold plate, and a hot runner plate is arranged on the upper part, a first parting surface is arranged between the lower male mold plate and the lower female mold plate, and a second parting surface is arranged between the upper male mold plate and the upper female mold plate;

[0007] The stack mold opening drive mechanism includes a pull rod and a swing rod, the pull rod includes an upper mold pull rod and a lower mold pull rod, one end of the upper mold pull rod and the lower mold pull rod are respectively rotatably connected to the upper male mold foot and the lower male mold foot, and the other end is respectively rotatably connected to the two ends of the swing rod, and the middle part of the swing rod is rotatably connected to the hot runner plate;

[0008] After the laminated mold frame completes the mold opening of the first parting surface under the drive of the injection molding machine, the lower mold tie rod can pull the swing rod to rotate to open the second parting surface. At the same time, the swing rod pulls the upper mold tie rod to rotate until the laminated mold frame is completely opened.

[0009] Optionally, the pull rod is rotatably connected to the laminated mold frame through a first rotating mechanism, the first rotating mechanism includes a first ball bearing, a pull rod positioning shoulder sleeve and a pull rod fixing screw, the pull rod is provided with a first through hole at the rotational connection between the pull rod and the laminated mold frame, the first ball bearing is arranged in the first through hole, the pull rod positioning shoulder sleeve is arranged on the side of the first through hole away from the laminated mold frame, and extends into the laminated mold frame through the first ball bearing, and the pull rod fixing screw is passed through the pull rod positioning shoulder sleeve and is threadedly connected to the laminated mold frame.

[0010] Optionally, a tie rod pad is also included. The tie rod pad is arranged between the tie rod and the stacking mold frame, and is used to prevent the tie rod from directly contacting the stacking mold frame to ensure smooth rotation.

[0011] Optionally, the pull rod is rotatably connected to the rocker arm through a second rotating mechanism, the second rotating mechanism includes a second rolling bearing, a connecting shoulder sleeve and a screw, a second through hole is provided at the rotational connection between the pull rod and the rocker arm, and a third through hole is provided at both ends of the rocker arm, the second through hole and the third through hole are symmetrically arranged, the number of the second rolling bearings is 2, which are respectively arranged in the second through hole and the third through hole, the connecting shoulder sleeve is arranged on the side of the rocker arm close to the laminated mold frame, and is passed through the ball bearing and threadedly connected to the screw.

[0012] Optionally, a connecting pad is provided between the screw and the pull rod, and the connecting pad is used to prevent the screw from directly contacting the pull rod to ensure smooth rotation.

[0013] Optionally, a fourth through hole is provided in the middle of the rocker arm, which is rotatably connected to the hot runner plate through a third rotating mechanism. The third rotating mechanism includes a third rolling bearing, a rocker arm positioning shoulder sleeve and a rocker arm fixing screw. The third rolling bearing is arranged in the fourth through hole, the rocker arm positioning shoulder sleeve is arranged on the side of the rocker arm away from the hot runner plate and is passed through the third rolling bearing, and the rocker arm fixing screw passes through the rocker arm positioning shoulder sleeve and is threadedly connected to the hot runner plate.

[0014] Optionally, it also includes a rocker arm pad, which is fixed to the hot runner plate by bolts and has a fifth through hole in the middle, the fifth through hole corresponds to the position of the fourth through hole, and the end of the rocker arm positioning shoulder sleeve passes through the fifth through hole to contact the surface of the hot runner plate.

[0015] Optionally, there are gaps between the pull rod positioning shoulder sleeve and the pull rod, between the connecting pad and the pull rod, and between the rocker rod positioning shoulder sleeve and the rocker rod, and the gap range is 0.2~0.5mm.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The stacking mold driving mechanism provided by the utility model has a simple structure. After the injection molding machine drives the lower stacking mold frame to complete the first parting surface mold opening, the lower mold pull rod rotates, and then pulls the swing rod to open the second parting surface mold. The rotation of the swing rod will drive the upper mold pull rod to rotate until the stacking mold frame is completely opened. The transmission is stable and reliable, easy to use, low in production cost, and simple in later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the exploded structure of the stacking mold opening drive mechanism in one embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the top view of the structure of the stacked mold frame in the mold closing state in one embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the top view of the structure of the laminated mold frame in the mold opening state in one embodiment of the utility model;

[0021] In the figure: 1 upper mold tie rod, 2 lower mold tie rod, 3 rocker rod, 4 first through hole, 5 second through hole, 6 third through hole, 7 fourth through hole, 8 fifth through hole, 9 first ball bearing, 10 tie rod positioning shoulder sleeve, 11 tie rod fixing screw, 12 tie rod pad, 13 second ball bearing, 14 third ball bearing, 15 connecting shoulder sleeve, 16 screw, 17 connecting pad, 18 fourth ball bearing, 19 rocker rod positioning shoulder sleeve, 20 rocker rod fixing screw, 21 rocker rod pad, 22 bolt, 23 laminated mold frame, 24 upper male mold plate, 25 lower male mold plate, 26 middle mold plate, 27 upper female mold plate, 28 lower female mold plate, 29 hot runner plate, 30 lower male mold foot, 31 upper male mold foot. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0025] like Figure 1 As shown, the stacking mold opening drive mechanism provided by the embodiment of the utility model is arranged on the stacking mold frame 23. The structure of the stacking mold frame 23 specifically includes an upper core mold plate 24, a lower core mold plate 25 and a middle mold plate 26. The upper core mold plate 24 is fixed to the injection molding machine and does not move. The lower core mold plate 25 is connected to the driving end of the injection molding machine. Under the drive of the injection molding machine, the lower core mold plate 25 can move forward and backward. The upper mother mold plate 27 and the lower mother mold plate 28 are respectively arranged on both sides of the middle mold plate 26, and a hot runner plate 29 is arranged on the upper part.

[0026] A first parting surface is provided between the lower male template 25 and the lower female template 28, and a second parting surface is provided between the upper male template 24 and the upper female template 27. Driven by the injection molding machine, the lower male template 25 is away from the lower female template 28, and the mold opening operation of the first parting surface of the stacking mold frame 23 can be completed.

[0027] The stack mold opening drive mechanism includes a tie rod and a swing rod 3. The tie rod is divided into an upper mold tie rod 1 and a lower mold tie rod 2. One end of the upper mold tie rod 1 and the lower mold tie rod 2 are rotatably connected to the upper male mold foot 31 and the lower male mold foot 30 respectively, and the other end is rotatably connected to the two ends of the swing rod 3. The middle part of the swing rod 3 is rotatably connected to the hot runner plate 29.

[0028] The realization of the rotation connection depends on the rotation mechanism, specifically:

[0029] The rotational connection between the two ends of the tie rod and the laminated mold frame 23 is realized by the first rotation mechanism, which includes the first ball bearing 9, the tie rod positioning shoulder sleeve 10 and the tie rod fixing screw 11. The first through hole 4 is provided at the rotational connection between the tie rod and the laminated mold frame 23. The first ball bearing 9 is provided in the first through hole 4. The tie rod positioning shoulder sleeve 10 is provided on the side of the first through hole 4 away from the laminated mold frame 23 and extends through the first ball bearing 9 into the laminated mold frame 23. The tie rod fixing screw 11 is passed through the tie rod positioning shoulder sleeve 10 and is threadedly connected to the laminated mold frame 23. A tie rod pad 12 is provided between the tie rod and the laminated mold frame 23. The tie rod pad 12 can prevent the tie rod from directly contacting the laminated mold frame 23 to ensure smooth rotation.

[0030] The rotation connection between the other two ends of the pull rod and the swing rod 3 is realized by a second rotation mechanism, which includes a second rolling bearing 13, a connecting shoulder sleeve 15 and a screw 16. The pull rod and the swing rod 3 are respectively provided with a second through hole 5 and a third through hole 6 at the rotation connection. The second through hole 5 and the third through hole 6 are symmetrically arranged. The number of the second rolling bearings 13 is 2, which are respectively arranged in the second through hole 5 and the third through hole 6. The connecting shoulder sleeve 15 is arranged on the side of the swing rod 3 close to the laminated mold frame 23, and is penetrated in the second ball bearing 13 and threadedly connected with the screw 16. A connecting pad 17 is provided between the screw 16 and the pull rod, and the connecting pad 17 can prevent the screw 16 from directly contacting the pull rod, and avoid the screw 16 from being too tight and rotating unsmoothly.

[0031] The rotation connection between the swing rod 3 and the hot runner plate 29 is realized by the third rotation mechanism. The hot runner plate 29 is provided with a swing rod pad 21. In this embodiment, the swing rod pad 21 is connected to the hot runner plate 29 by a plurality of bolts 22. A fifth through hole 8 is provided in the middle of the swing rod pad 21, and the fifth through hole 8 corresponds to the position of the fourth through hole 7. The third rotation mechanism includes a third rolling bearing 14, a swing rod positioning shoulder sleeve 19 and a swing rod fixing screw 20. The middle of the swing rod 3 is provided with a fourth through hole 7, and the third rolling bearing 14 is arranged in the fourth through hole 7. The swing rod positioning shoulder 19 is arranged on the side of the swing rod away from the hot runner plate 29 and passes through the third rolling bearing 14 and the fifth through hole 8 to contact the surface of the hot runner plate 29. The swing rod fixing screw 20 passes through the swing rod positioning shoulder sleeve 19 and is threadedly connected to the hot runner plate 29. Example

[0032] Based on Example 1, this embodiment provides gaps between the pull rod positioning shoulder sleeve 10 and the pull rod, the connecting pad 17 and the pull rod, and the rocker arm positioning shoulder sleeve 19 and the rocker arm 3. The size of the gap is 0.2~0.5mm. The gap is set to ensure that the pull rod and the rocker arm 3 are not locked too tightly and cannot rotate.

[0033] The working principle of the utility model is: when opening the mold: Figure 3 As shown, the injection molding machine drives the lower male template 25 to move backward, so that the lower male template 25 leaves the lower female template 28, and the first parting surface is opened. During the process of opening the first parting surface, the lower mold tie rod 2 will be pulled to change its angle, that is, rotate. Since the other end of the lower mold tie rod 2 is connected to the swing rod 3, the swing rod 3 is driven to rotate at the rotation connection between it and the lower mold tie rod 2 under the rotation of the lower mold tie rod 2. During the rotation of the swing rod 3, the upper mold tie rod 1 is driven to rotate, so that the upper male template 24 and the upper female template 27 are separated, and the second parting surface is opened until the first parting surface and the second parting surface are completely opened, and the mold opening operation is completed.

[0034] When closing the mold: Figure 2As shown, the injection molding machine drives the lower male template 25 to move forward, so that the lower male template 25 is close to the lower female template 28, and the first parting surface is molded. During the mold closing process of the first parting surface, the lower mold tie rod 2 will be pulled to change its angle, that is, rotate. Since the other end of the lower mold tie rod 2 is connected to the swing rod 3, the swing rod 3 is driven to rotate at its rotation connection with the lower mold tie rod 2 under the rotation of the lower mold tie rod 2. During the rotation of the swing rod 3, the upper mold tie rod 1 is driven to rotate, so that the upper male template 24 and the upper female template 27 are close to each other, and then the mold closing of the second parting surface is completed, until the first parting surface and the second parting surface are completely molded, and the mold closing operation is completed.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A stacking mold opening drive mechanism, the stacking mold opening drive mechanism is arranged on a stacking mold frame, the stacking mold frame is connected to the injection molding machine driving, and comprises an upper male mold plate, a lower male mold plate and a middle mold plate, the two sides of the middle mold plate are respectively provided with an upper female mold plate and a lower female mold plate, and a hot runner plate is arranged on the upper part, a first parting surface is arranged between the lower male mold plate and the lower female mold plate, and a second parting surface is arranged between the upper male mold plate and the upper female mold plate, characterized in that: The stack mold opening drive mechanism includes a pull rod and a swing rod, the pull rod includes an upper mold pull rod and a lower mold pull rod, one end of the upper mold pull rod and the lower mold pull rod are respectively rotatably connected to the upper male mold foot and the lower male mold foot, and the other end is respectively rotatably connected to the two ends of the swing rod, and the middle part of the swing rod is rotatably connected to the hot runner plate; After the laminated mold frame completes the mold opening of the first parting surface under the drive of the injection molding machine, the lower mold tie rod can pull the swing rod to rotate to open the second parting surface. At the same time, the swing rod pulls the upper mold tie rod to rotate until the laminated mold frame is completely opened.

2. The stack mold opening drive mechanism according to claim 1, characterized in that: The pull rod is rotationally connected to the laminated mold frame through a first rotating mechanism, and the first rotating mechanism includes a first ball bearing, a pull rod positioning shoulder sleeve and a pull rod fixing screw. The pull rod is rotationally connected to the laminated mold frame at a first through hole, and the first ball bearing is arranged in the first through hole. The pull rod positioning shoulder sleeve is arranged on a side of the first through hole away from the laminated mold frame and extends into the laminated mold frame through the first ball bearing. The pull rod fixing screw is passed through the pull rod positioning shoulder sleeve and is threadedly connected to the laminated mold frame.

3. The stacked mold opening drive mechanism according to claim 2, characterized in that: It also includes a tie rod pad block, which is arranged between the tie rod and the stacking mold frame and is used to prevent the tie rod from directly contacting the stacking mold frame to ensure smooth rotation.

4. The stack mold opening drive mechanism according to claim 1, characterized in that: The pull rod is rotationally connected to the rocker arm through a second rotating mechanism, and the second rotating mechanism includes a second rolling bearing, a connecting shoulder sleeve and a screw. A second through hole is provided at the rotational connection between the pull rod and the rocker arm, and a third through hole is provided at both ends of the rocker arm. The second through hole and the third through hole are symmetrically arranged. The number of the second rolling bearings is 2, which are respectively arranged in the second through hole and the third through hole. The connecting shoulder sleeve is arranged on the side of the rocker arm close to the laminated mold frame, and is penetrated into the ball bearing and threadedly connected with the screw.

5. The stacked mold opening drive mechanism according to claim 4, characterized in that: A connecting pad is provided between the screw and the pull rod, and the connecting pad is used to prevent the screw from directly contacting the pull rod and ensure smooth rotation.

6. The stack mold opening drive mechanism according to claim 1, characterized in that: A fourth through hole is provided in the middle of the rocker arm, which is rotatably connected to the hot runner plate through a third rotating mechanism. The third rotating mechanism includes a third rolling bearing, a rocker arm positioning shoulder sleeve and a rocker arm fixing screw. The third rolling bearing is arranged in the fourth through hole, the rocker arm positioning shoulder sleeve is arranged on the side of the rocker arm away from the hot runner plate and is penetrated in the third rolling bearing, and the rocker arm fixing screw passes through the rocker arm positioning shoulder sleeve and is threadedly connected to the hot runner plate.

7. The stacked mold opening drive mechanism according to claim 6, characterized in that: It also includes a rocker arm pad, which is mounted on the hot runner plate by bolts and has a fifth through hole in the middle, the fifth through hole corresponds to the position of the fourth through hole, and the end of the rocker arm positioning shoulder sleeve passes through the fifth through hole and contacts the surface of the hot runner plate.

8. The stacked mold opening drive mechanism according to any one of claims 1 to 7, characterized in that: There are gaps between the pull rod positioning shoulder sleeve and the pull rod, between the connecting pad and the pull rod, and between the rocker rod positioning shoulder sleeve and the rocker rod, and the gap range is 0.2-0.5 mm.

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