A rapid mold changing mechanism for injection mold

Abstract

The utility model discloses a kind of quick die changing mechanism of injection mold, including bottom plate, thread rod is rotatably connected on the bottom plate, the block body is threadedly connected with the thread rod, hydraulic cylinder is installed on the block body, the output end of the hydraulic cylinder is connected with plate body, one end of the plate body is connected with connecting piece, one end of the connecting piece is provided with sliding slot one, two groups of sliding block one are slidably connected with the sliding slot one, the sliding slot one is T-shaped and is in accord with sliding block one, one end of two groups of the sliding block one is connected with hook, and one end of two groups of the hook is machined with thread.The utility model is replaced when injection mold, first loosen sliding block one by screw nut, adjust hook distance along sliding slot one to match mold lifting lug, then let gasket abut against connecting piece by screw nut and fix again.Hook is hung with mold after butt joint lifting lug, start hydraulic cylinder and lift mold, then start motor and move to specified place by thread rod with mold, push pad block to stick mold by spring telescopic rod in moving, and limit is prevented from shaking.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding, and in particular to a quick mold changing mechanism for injection molds. Background Technology

[0002] Injection molds are tools used for plastic molding. They inject molten plastic into a cavity under high temperature and pressure, and after cooling, a plastic product of a specific shape is obtained. They have high productivity, can quickly mold a large number of plastic parts, and can contain multiple cavities, producing multiple products in a single cycle. They have high dimensional accuracy and good repeatability, ensuring that the shape and size of parts produced in different molding cycles are consistent. They have a low scrap rate, and if recyclable thermoplastic materials are used, excess plastic from gates, runners, etc., can be reheated and molded. They have low labor costs and a high degree of automation, with most steps performed by machines and minimal human intervention.

[0003] The existing announcement number is CN221161281U, which discloses an injection mold changing mechanism, relating to the field of injection mold technology. It includes a base plate, with a lifting assembly fixedly connected to the upper surface of the base plate near its center, and a rotating assembly positioned on the upper surface of the base plate near its rear surface. In this invention, during use, the lifting assembly and the rotating assembly work together to allow the output end of the hydraulic telescopic rod to extend outwards, which in turn moves the support block up and down via a support column, thus adjusting the height of the support block. The output end of the motor drives the rotating shaft to rotate, causing the first roller to drive the second roller via a belt, thereby adjusting the rotation angle of the rotating assembly. This allows for adjustment of the lifting height and rotation angle during injection mold changes, facilitating quick installation of the injection mold onto the injection molding machine and improving the efficiency of the injection mold changing mechanism.

[0004] The above-mentioned issues mean that although the mold can be hoisted using a combination of lifting rings and steel cables, the fixed position of the lifting rings can lead to uneven stress on the steel cables if the spacing between the fixed lifting rings is too narrow or too wide for molds that are too wide or too long. If the spacing is too narrow, the angle between the steel cable and the edge of the mold is too small, which may squeeze the fragile parts on the surface of the mold, such as the mold cavity and guide pillars. If the spacing is too wide, the steel cable is prone to slipping out of the lifting rings. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quick mold changing mechanism for injection molds.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A quick mold change mechanism for injection molds includes a base plate, on which a threaded rod is rotatably connected. A block is threadedly connected to the threaded rod, and a hydraulic cylinder is mounted on the block. The output end of the hydraulic cylinder is connected to a plate. A connector is connected to one end of the plate. One end of the connector has a sliding groove. Two sets of sliders are slidably connected to the sliding groove. The sliding groove is T-shaped and fits the sliders. A hook is connected to one end of each set of sliders. A thread is machined onto one end of each set of hooks. Nuts are threaded onto each set of threads. A spring telescopic rod is connected to one end and the other end of the connector.

[0007] Preferably, a counterweight is placed at one end of the base plate, and baffles are attached to both ends of the counterweight. Multiple sets of holes are provided at both ends of the base plate, and two sets of holes are provided at one end of each set of baffles. Bolts are threadedly connected to both sets of holes, and the two sets of bolts are threadedly connected to the corresponding holes.

[0008] Preferably, one end of each of the two sets of nuts is connected to a washer, and both sets of washers are pressed against the connector.

[0009] Preferably, one end of each of the two sets of spring telescopic rods is connected to a pad.

[0010] Preferably, one end of the block is provided with two sets of sliding grooves, and the bottom plate is connected with two sets of sliders, which are slidably connected to the corresponding sliding grooves.

[0011] Preferably, the base plate is equipped with casters at all four ends of its bottom, and a motor is installed at one end of the base plate. The output end of the motor is connected to a threaded rod via a coupling.

[0012] Preferably, one end of the base plate is connected to a handrail, the handrail is connected to two sets of sponge sleeves, and the angle between the plate and the connector is connected to multiple sets of reinforcing ribs.

[0013] The beneficial effects of this utility model are as follows: 1. By coordinating the threaded rod, block, and hydraulic rod, when changing injection molds, the hook spacing must first be adjusted according to the specific dimensions of the mold to be replaced. The operator tightens the nut at one end of the hook to release the nut's limiting effect on the slider. The slider slides along the groove, and the operator can move both sets of sliders according to the actual spacing of the mold lifting lugs until the hook spacing matches the mold lifting lug spacing, thus achieving a certain degree of adaptability to injection molds of different specifications and sizes. After the hook spacing is adjusted, the nut is tightened again to ensure the washer connected to one end of the nut is tightly fitted against the surface of the connector. This ensures that the slider and hook are fixed in the current adjusted position. Then, the two adjusted hooks are connected to the lifting lugs on both sides of the mold to complete the mold mounting operation. At this time, the hydraulic cylinder is activated, and the output end of the hydraulic cylinder will drive the plate, connector, and mounted mold to rise synchronously, lifting the mold from its original position. The motor is started, and the threaded rod drives the block to move, thereby moving the mold to the designated mold changing position. During mold transfer, the spring telescopic rods connected to both ends of the connector will push the end pads to fit tightly against the two ends of the middle area of ​​the mold under their own elastic force. The elastic support of the spring telescopic rods can limit the mold and, to a certain extent, counteract the swaying tendency caused by starting, stopping, or slight vibration during mold transfer, thus preventing the mold from shifting or swaying during the transfer process. 2. By coordinating the counterweight, bolts, and holes, the operator first unscrews the bolts on the baffle, releasing the fixing relationship between the baffle and the base plate, separating the baffle from the original counterweight, and eliminating the baffle's limiting effect on the counterweight. The original counterweight can then be removed from the base plate. The operator must first confirm the actual weight of the mold to be mounted, and then select a counterweight of suitable size and weight. The selected counterweight is placed stably on the base plate, ensuring the bottom of the counterweight is flush with the base plate surface without any offset or tilting. The two sets of baffles are then pressed against both ends of the counterweight, restricting its movement from both sides and preventing positional displacement during subsequent mechanism movement or mold transfer. Next, the bolts are screwed into the corresponding holes on the base plate. Multiple sets of holes are provided on the base plate; the appropriate hole position can be selected according to the actual size of the counterweight. At this point, the baffle is fixed to the base plate, and the limiting effect of the baffle stabilizes the counterweight on the base plate. The design of multiple sets of holes can accommodate counterweights of different sizes to a certain extent, thus avoiding the problem of mechanism tipping over due to insufficient counterweight. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a quick mold changing mechanism for injection molds proposed in this utility model; Figure 2 for Figure 1 A structural diagram of the middle hook and washer; Figure 3 for Figure 1 A schematic diagram of the structure of the middle slide, spring telescopic rod, and pad block; Figure 4 for Figure 1 Schematic diagram of the central counterweight, hole one, and bolts; Figure 5 for Figure 1 A schematic diagram of the structure of the threaded rod, block, and slider.

[0015] In the diagram: 1. Base plate; 2. Threaded rod; 3. Block; 4. Hydraulic cylinder; 5. Plate; 6. Connector; 7. Slide groove one; 8. Slider one; 9. Hook; 10. Thread; 11. Nut; 12. Washer; 13. Spring telescopic rod; 14. Pad; 15. Slide groove two; 16. Slider two; 17. Counterweight; 18. Baffle; 19. Hole one; 20. Hole two; 21. Bolt; 22. Caster wheel; 23. Motor; 24. Handrail; 25. Sponge sleeve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Example 1, referring to Figures 1 to 5A quick mold changing mechanism for injection molds includes a base plate 1, on which a threaded rod 2 is rotatably connected. Rotating the threaded rod 2 moves a block 3. The threaded rod 2 is threadedly connected to the block 3, which in turn moves a hydraulic cylinder 4. The hydraulic cylinder 4 is mounted on the block 3, and its model can be selected according to actual needs. The output end of the hydraulic cylinder 4 is connected to a plate 5. The hydraulic cylinder 4, through a connecting piece 6, moves the mold mounted on a hook 9 to the corresponding position. The hydraulic cylinder 4 then moves the mold downward to complete the installation. One end of the plate 5 is connected to the connecting piece 6, and one end of the connecting piece 6 has a slide groove 7. A slider 8 can slide within the slide groove 7 to adjust the spacing and adapt to molds of different sizes. Two sets of sliders 8 are slidably connected to the slide groove 7. The slide groove 7 is T-shaped and fits the sliders 8 to prevent them from slipping. One end of each set of sliders 8 is connected to a hook 9, which cooperates with the lifting lugs on the mold to mount the mold. One end of each set of hooks 9 is also equipped with... The machine has two sets of threads 10, each connected to a nut 11. The nut 11 is used to fix the hook 9 in the current position. One end of the connector 6 is connected to a spring telescopic rod 13. When the mold is mounted, the spring telescopic rod 13 is pressed against one end and the other end of the middle area of ​​the mold under the action of elasticity, which avoids the shaking of the movement to a certain extent. Tightening the nut 11 removes the restriction on the slider 8 and moves it in the slide groove 7. The spacing of the hook 9 is adjusted according to the actual mold size to adapt to different mold sizes to a certain extent. After adjustment, tightening the nut 11 makes the washer 12 press against the connector 6, fixing the hook 9 in the current position. The hook 9 cooperates with the mold lifting lug to mount the mold. The hydraulic cylinder 4 is started to lift the mold and move it to the designated position. After moving it to the designated position, the motor 23 is started to drive the mold to the designated position through the threaded rod 2. The spring telescopic rod 13 presses against the middle area of ​​the mold, which can avoid the shaking of the mold during movement to a certain extent.

[0018] In this embodiment, a counterweight 17 is placed at one end of the base plate 1. The counterweight 17 increases the weight at one end of the base plate 1, which to some extent prevents the device from tipping over to the side of the mounting mold. Baffles 18 are fitted to both ends of the counterweight 17, and the baffles 18 are used to fix the counterweight 17. Multiple sets of holes 19 are provided at both ends of the base plate 1. Two sets of holes 20 are provided at one end of each set of baffles 18. Bolts 21 are threadedly connected to both sets of holes 20. For the fixed baffle 18, two sets of bolts 21 are threadedly connected to the corresponding holes 19. Unscrewing the bolts 21 removes the restriction on the baffle 18, and moving the baffle 18 removes the restriction on the counterweight 17. A counterweight 17 of appropriate size is selected according to the weight of the mold and placed on the base plate 1. The baffle 18 and the counterweight 17 are then pressed together. The bolts 21 are screwed into the corresponding holes 19 on the base plate 1 to fix the baffle 18, thereby fixing the counterweight 17. This design offers a wide range of applicability. Both sets of nuts 11 have washers 12 connected to one end, and both washers 12 are pressed against the connecting piece 6 to increase friction and prevent the nuts 11 from loosening. Both sets of spring telescopic rods 13 have pads 14 connected to one end. The pads 14 are made of rubber to increase friction with the mold and improve stability. Two sets of sliding grooves 15 are provided at one end of block 3, and two sets of sliders 16 are connected to the base plate 1. The two sets of sliders 16 are slidably connected to the corresponding sliding grooves 15 to guide the movement of block 3. Universal wheels 22 are installed at all four ends of the bottom of the base plate 1 to facilitate the movement of the device. A motor 23 is installed at one end of the base plate 1. The model of motor 23 can be selected according to the actual situation. The output end of motor 23 is connected to threaded rod 2 through a coupling, and motor 23 drives threaded rod 2 to rotate. A handrail 24 is connected to one end of the base plate 1 to facilitate the pushing of the device. Two sets of sponge sleeves 25 are connected to the handrail 24 to improve the grip. Multiple sets of reinforcing ribs are connected at the angle between plate 5 and connector 6 to enhance structural strength.

[0019] The working principle of this embodiment is as follows: First, based on the weight of the mold to be mounted, select a counterweight 17 of appropriate weight and place it at the end of the base plate 1 furthest from the mold. The counterweight 17 balances the center of gravity of the mechanism, preventing the mechanism from tipping to one side due to excessive mold weight. When placing the counterweight 17, first unscrew the bolt 21 connected to the hole 19 on the baffle 18. After moving the baffle 18, place the counterweight 17 in the baffle. Then, align the baffle 18 with both ends of the counterweight 17. Pass the bolt 21 through the hole 20 on the baffle 18 and screw it into the corresponding hole 19 on the base plate 1. Fix the position of the counterweight 17 using the baffle 18. Loosen the nut 11 on the thread 10 at one end of the hook 9 to release the nut 11's restriction on the slider 8. Push the two sets of sliders 8 along the slide groove 7 until the distance between the two sets of hooks 9 matches the distance between the mold lifting lugs. After the spacing adjustment is completed, tighten nut 11 again so that washer 12 at one end of nut 11 presses against the surface of connector 6, fixing slider 8 and hook 9 in the current position to prevent hook 9 from shifting during subsequent operations. Connect the two sets of hooks 9 that have been adjusted to the lifting lugs on both sides of the mold to complete the mold mounting operation. Start the hydraulic cylinder 4 installed on block 3. The output end of hydraulic cylinder 4 drives plate 5, connector 6 and the mounted mold to rise synchronously, lifting the mold smoothly from its original position. Move the device to the corresponding position using casters 22, and start motor 23. The output end of motor 23 drives threaded rod 2 to rotate through coupling. Since threaded rod 2 is threadedly connected to block 3, and block 3 slides with slider 16 on base plate 1 through slide groove 15, slider 16 guides the movement of block 3. When threaded rod 2 rotates, it will drive block 3, hydraulic cylinder 4 and mold to move until the mold is moved to the designated mold changing position of injection molding machine. During mold transfer, the spring telescopic rods 13 connected to both ends of the connector 6 will push the end pads 14 to fit against both ends of the middle area of ​​the mold under their own elastic force. The elastic support force of the spring telescopic rods 13 can limit the mold to a certain extent, counteracting the tendency of the mold to shake due to start-up, stopping, or slight vibration, and avoiding positional displacement or collision damage during mold transfer. After the mold is transferred to the designated mold changing position, the output end of the control hydraulic cylinder 4 retracts, driving the mold down and precisely aligning it with the mold installation station of the injection molding machine, completing the mold replacement and installation operation.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick mold changing mechanism for injection molds, comprising a base plate (1), characterized in that, A threaded rod (2) is rotatably connected to the base plate (1). A block (3) is threadedly connected to the threaded rod (2). A hydraulic cylinder (4) is installed on the block (3). A plate (5) is connected to the output end of the hydraulic cylinder (4). A connector (6) is connected to one end of the plate (5). A slide groove (7) is opened at one end of the connector (6). Two sets of sliders (8) are slidably connected to the slide groove (7). The slide groove (7) is T-shaped and fits with the sliders (8). A hook (9) is connected to one end of each set of sliders (8). A thread (10) is machined to one end of each set of hooks (9). Nuts (11) are threaded to each set of threads (10). A spring telescopic rod (13) is connected to one end and the other end of the connector (6).

2. The quick mold changing mechanism for injection molds according to claim 1, characterized in that, A counterweight (17) is placed at one end of the base plate (1). A baffle (18) is placed at one end and the other end of the counterweight (17). Multiple sets of holes (19) are opened at one end and the other end of the base plate (1). Holes (20) are opened at one end of each set of baffles (18). Bolts (21) are threadedly connected to each set of holes (20). Bolts (21) are threadedly connected to the corresponding holes (19).

3. The quick mold changing mechanism for injection molds according to claim 1, characterized in that, Both sets of nuts (11) are connected to a washer (12) at one end, and both sets of washers (12) are pressed against the connector (6).

4. The quick mold changing mechanism for injection molds according to claim 1, characterized in that, Both sets of spring telescopic rods (13) have a pad (14) connected to one end.

5. The quick mold changing mechanism for injection molds according to claim 1, characterized in that, Two sets of sliding grooves (15) are provided at one end of the block (3), and two sets of sliders (16) are connected on the base plate (1). The two sets of sliders (16) are slidably connected to the corresponding sliding grooves (15).

6. The quick mold changing mechanism for injection molds according to claim 1, characterized in that, The bottom plate (1) is equipped with casters (22) at all four ends. A motor (23) is installed at one end of the bottom plate (1). The output end of the motor (23) is connected to the threaded rod (2) through a coupling.

7. The quick mold changing mechanism for injection molds according to claim 1, characterized in that, One end of the base plate (1) is connected to a handrail (24), and two sets of sponge sleeves (25) are connected to the handrail (24). Multiple sets of reinforcing ribs are connected at the angle between the plate (5) and the connector (6).

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