Mold opening and closing device of injection molding machine

Abstract

The utility model discloses a mould opening and closing device of an injection molding machine, which comprises a bottom plate, an injection molding upper mould seat and an injection molding lower mould seat, the bottom plate is provided with a vertical frame and a limiting sliding chute, a first sliding block and a second sliding block which move oppositely are arranged in the limiting sliding chute through a gear rack group, and the injection molding upper mould seat is fixedly connected with one side of the first sliding block through a first connecting block. The injection molding lower mold base is fixedly connected with one side of the second sliding block through a second connecting block, and one end of the gear and rack set is in transmission connection with a motor through a transmission shaft and a gear set. Therefore, the injection molding upper mold base and the injection molding lower mold base can be moved and adjusted up and down in opposite directions, the injection molding upper mold base and the injection molding lower mold base are controlled to be opened and closed up and down, the opening and closing transmission stability is high, and adjustment is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a mold opening and closing device for an injection molding machine. Background Art

[0002] An injection molding machine, also known as an injection molding machine or injection machine, is the primary molding equipment used to convert thermoplastics or thermosetting plastics into various shapes using plastic molding molds. Available in vertical, horizontal, and all-electric models, the machine heats the plastic and applies high pressure to the molten plastic, causing it to eject and fill the mold cavity. The mold on the injection molding machine requires opening and closing during the production process. After the molded part cools, the mold needs to be opened and ejected.

[0003] In the prior art, application number 201920370490.2 is an energy-saving mold opening and closing device for an injection molding machine, comprising a bracket, the top of the bracket is fixedly connected to a workbench, and the side of the bracket is fixedly sleeved with a partition located below the workbench, a cylinder is fixedly installed in the middle of the bottom end of the partition, and sleeve rods are fixedly connected to both sides of the top of the partition, a lower mold is fixedly installed in the middle of the top of the workbench, and both sides of the top of the workbench are fixedly connected to a fixed frame located on the side of the lower mold. The energy-saving mold opening and closing device for an injection molding machine is configured to: after the plastic part is cooled and formed after injection molding, start the cylinder to push the piston rod upward, thereby pushing the push rod on the connecting frame to rise and open the upper mold above the lower mold; after the plastic part is ejected, start the cylinder to drive the upper mold to descend and close with the lower mold, thereby realizing the rapid opening and closing of the injection mold on the injection molding machine. This can be achieved using a single cylinder, with a simple structure, low manufacturing cost and energy consumption. However, the stability of the opening and closing transmission of the upper and lower mold bases is low, and the opening and closing adjustment is inconvenient. Utility Model Content

[0004] The utility model aims to provide a mold opening and closing device for an injection molding machine, so as to solve the problems in the prior art of low stability of the opening and closing transmission of the upper and lower mold bases and inconvenient opening and closing adjustment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an injection molding machine mold opening and closing device, comprising a base plate, an injection upper mold base and an injection lower mold base, a vertical frame is provided on the upper side of the base plate, and a limiting slide groove is provided on the side wall of the vertical frame, and a first slider and a second slider that move toward each other are provided on the inner wall of the limiting slide groove through a gear rack group, the two sides of the injection upper mold base are fixedly connected to one side of the first slider through a first connecting block, and the two sides of the injection lower mold base are fixedly connected to one side of the second slider through a second connecting block, one end of the gear rack group is connected to the second transmission shaft through the first transmission shaft and the first gear group, one end of the second transmission shaft is connected to the third transmission shaft through the second gear group, and one end of the third transmission shaft is connected to the motor through the third gear group.

[0006] Furthermore, the gear rack assembly includes a driven rack arranged on one side of the first slider and the second slider, and a driving gear is provided at one end of the first transmission shaft in the middle of the limiting slide groove, and the driven rack and the driving gear are meshed and connected.

[0007] Furthermore, the driven rack is symmetrically arranged with respect to the center of the driving gear, and the first transmission shaft is rotatably arranged in the middle of the limiting sliding groove through a bearing.

[0008] Furthermore, a limiting sliding hole is provided in the middle of the first sliding block and the second sliding block, and a limiting rod is provided on the inner wall of the limiting sliding groove so as to slide with the limiting sliding hole.

[0009] Furthermore, the outer wall of the bottom plate is provided with a first stable bracket and a second stable bracket, and both ends of the second transmission shaft are rotatably connected to the first stable bracket through bearings, and both ends of the third transmission shaft are rotatably connected to the second stable bracket through bearings.

[0010] Furthermore, the first gear set, the second gear set and the third gear set are all reduction bevel gear sets, and a PLC control cabinet for overall control is provided on the outside of the stand.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the present invention, the inner wall of the limiting slide groove of the stand is provided with a first slider and a second slider that move toward each other through a gear rack set, and the two sides of the injection upper mold base and the injection lower mold base are fixedly connected to the first slider and the second slider respectively through connecting blocks, so that the first slider and the second slider are driven by the motor, the transmission shaft and the gear rack set to move toward each other and adjust, so that the injection upper mold base and the injection lower mold base can be adjusted to move toward each other up and down, and then the injection upper mold base and the injection lower mold base can be controlled to open and close up and down, the opening and closing transmission stability is high, and the adjustment is convenient and quick.

[0013] 2. In the present invention, one end of the rack and pinion set is connected to the second transmission shaft through the first transmission shaft and the first gear set, one end of the second transmission shaft is connected to the third transmission shaft through the second gear set, and one end of the third transmission shaft is connected to the motor through the third gear set. Therefore, one motor can be used to drive the two sets of first sliders and second sliders to move toward each other for adjustment, and the synchronization stability is high. There is no need to set up two sets of motors, which is convenient for energy saving.

[0014] 3. The utility model provides a limiting sliding hole in the middle of the first slider and the second slider, and a limiting rod slidingly arranged with the limiting sliding hole is provided on the inner wall of the limiting sliding groove, so that the first slider and the second slider can be guided by sliding when they are raised and lowered, which is beneficial to improving the stability of the lifting, opening and closing adjustment of the injection upper mold base and the injection lower mold base. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0016] Figure 1 is a whole structure schematic view of the present application;

[0017] Figure 2 is a stand structure schematic view of the present application;

[0018] Figure 3 is an injection mold base structure schematic view of the present application.

[0019] In the drawing: 1, bottom plate; 2, stand; 3, injection upper mold base; 4, first connecting block; 5, second connecting block; 6, limiting sliding groove; 7, second sliding block; 8, first sliding block; 9, first transmission shaft; 10, driving gear; 11, first gear set; 12, second transmission shaft; 13, second gear set; 14, third transmission shaft; 15, third gear set; 16, motor; 17, first stable support; 18, second stable support; 19, PLC control cabinet; 20, injection lower mold base; 21, limiting rod; 22, limiting sliding hole; 23, driven rack. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figure 1 , Figure 2 , Figure 3The utility model discloses an injection molding machine opening and closing mould device, including bottom plate 1, injection molding upper die holder 3 and injection molding lower die holder 20, the upside of bottom plate 1 is equipped with stand 2, and the side wall of stand 2 is equipped with limit sliding slot 6, and the inner wall of limit sliding slot 6 is equipped with the first slider 8 and second slider 7 of moving towards each other through gear and rack group, and the both sides of injection molding upper die holder 3 are fixedly connected with the one side of first slider 8 through first connecting block 4, and the both sides of injection molding lower die holder 20 are fixedly connected with the one side of second slider 7 through second connecting block 5, and one end of gear and rack group is drivenly connected with second transmission shaft 12 through first transmission shaft 9 and first gear set 11, and one end of second transmission shaft 12 is drivenly connected with third transmission shaft 14 through second gear set 13, and one end of third transmission shaft 14 is drivenly connected with motor 16 through third gear set 15, and gear and rack group includes driven rack 23 set on the one side of first slider 8 and second slider 7, and one end of first transmission shaft 9 in the middle of limit sliding slot 6 is equipped with driving gear 10, and driven rack 23 and driving gear 10 are meshedly connected, and driven rack 23 is symmetrically arranged about the center of driving gear 10, and first transmission shaft 9 is rotatably arranged in the middle of limit sliding slot 6 through bearing, so that first slider 8 and second slider 7 are driven to move towards each other by motor 16, transmission shaft and gear and rack group, thereby being adjusted, so that injection molding upper die holder 3 and injection molding lower die holder 20 can be adjusted to move towards each other, and then the opening and closing of injection molding upper die holder 3 and injection molding lower die holder 20 can be controlled, the opening and closing transmission stability is higher, and the adjustment is convenient and fast.

[0022] As Figure 1 and Figure 3 shown, in order to improve the stability of injection molding upper die holder 3 and injection molding lower die holder 20 lifting opening and closing adjustment, limit sliding hole 22 is also arranged in the middle of first slider 8 and second slider 7, and the inner wall of limit sliding slot 6 is provided with limit rod 21 slidably arranged in limit sliding hole 22, so that the sliding guide of first slider 8 and second slider 7 during lifting adjustment can be realized, and the stability of injection molding upper die holder 3 and injection molding lower die holder 20 lifting opening and closing adjustment can be improved.

[0023] As Figure 2 and Figure 3 shown, in order to synchronously drive two groups of first slider 8 and second slider 7 to move towards each other, first stable support 17 and second stable support 18 are arranged on the outer wall of bottom plate 1, and the both ends of second transmission shaft 12 are rotatably connected with first stable support 17 through bearing, and the both ends of third transmission shaft 14 are rotatably connected with second stable support 18 through bearing, first gear set 11, second gear set 13 and third gear set 15 are all reduction cone gear sets, the outer side of stand 2 is provided with PLC control cabinet 19 for overall control, and motor 16 is fixedly arranged on the top of second stable support 18, so that one motor 16 can be used to drive two groups of first slider 8 and second slider 7 to move towards each other, the synchronous stability is higher, and two groups of motors are not needed, and energy saving can be realized.

[0024] The working principle and use process of the utility model: when using, because the inner wall of the limiting sliding slot 6 of the stand 2 is provided with the first slider 8 and the second slider 7 moving towards each other through the gear and rack set, the upper injection mold base 3 and the lower injection mold base 20 are fixedly connected with the first slider 8 and the second slider 7 through the connecting block on both sides, so that the first slider 8 and the second slider 7 are driven to move towards each other to adjust through the motor 16, the transmission shaft and the gear and rack set, thereby the upper injection mold base 3 and the lower injection mold base 20 can be adjusted to move towards each other, and then the opening and closing of the upper injection mold base 3 and the lower injection mold base 20 is controlled, the opening and closing transmission stability is high, and the adjustment is convenient and fast.

[0025] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A mold opening and closing device for an injection molding machine, comprising a base plate (1), an upper injection mold base (3) and a lower injection mold base (20), characterized in that: A stand (2) is provided on the upper side of the base plate (1), a limiting slide groove (6) is provided on the side wall of the stand (2), and a first slider (8) and a second slider (7) are provided on the inner wall of the limiting slide groove (6) through a gear rack group, the two sides of the injection molding upper mold base (3) are fixedly connected to one side of the first slider (8) through a first connecting block (4), and the two sides of the injection molding lower mold base (20) are fixedly connected to one side of the second slider (7) through a second connecting block (5), one end of the gear rack group is connected to the second transmission shaft (12) through a first transmission shaft (9) and a first gear group (11), one end of the second transmission shaft (12) is connected to the third transmission shaft (14) through a second gear group (13), and one end of the third transmission shaft (14) is connected to the motor (16) through a third gear group (15).

2. The mold opening and closing device of an injection molding machine according to claim 1, characterized in that: The gear rack assembly comprises a driven rack (23) arranged on one side of the first slider (8) and the second slider (7), and a driving gear (10) is provided at one end of the first transmission shaft (9) in the middle of the limiting slide groove (6), and the driven rack (23) and the driving gear (10) are meshed and connected.

3. The mold opening and closing device of an injection molding machine according to claim 2, characterized in that: The driven rack (23) is symmetrically arranged about the center of the driving gear (10), and the first transmission shaft (9) is rotatably arranged in the middle of the limiting sliding groove (6) through a bearing.

4. The mold opening and closing device of an injection molding machine according to claim 1, characterized in that: A limiting sliding hole (22) is provided in the middle of the first sliding block (8) and the second sliding block (7), and a limiting rod (21) is provided on the inner wall of the limiting sliding groove (6) and is slidably arranged with the limiting sliding hole (22).

5. The mold opening and closing device of an injection molding machine according to claim 1, characterized in that: The outer wall of the base plate (1) is provided with a first stable bracket (17) and a second stable bracket (18), and both ends of the second transmission shaft (12) are rotatably connected to the first stable bracket (17) through bearings, and both ends of the third transmission shaft (14) are rotatably connected to the second stable bracket (18) through bearings.

6. The mold opening and closing device of an injection molding machine according to claim 1, characterized in that: The first gear set (11), the second gear set (13) and the third gear set (15) are all reduction bevel gear sets, and a PLC control cabinet (19) for overall control is provided on the outside of the stand (2).

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