A quick mold changing device

Abstract

This invention discloses a quick mold changing device, belonging to the field of mold technology. The quick mold changing device includes a fixed support mechanism. A bottom hydraulic cylinder and a top hydraulic cylinder are respectively fixedly installed on the top of the fixed base and the top fixed base. A bottom lifting mechanism and a top lifting mechanism, symmetrically arranged vertically, are slidably installed on multiple limiting rods. Sliding limiting mechanisms are slidably installed on both the bottom and top lifting mechanisms, and adjustable quick-fixing mechanisms are installed on both sets of sliding limiting mechanisms. A sliding support mechanism is also fixedly installed on the lower set of sliding limiting mechanisms. This invention, through the design of the bottom lifting mechanism, top lifting mechanism, sliding limiting mechanism, and quick-fixing mechanism, allows the mold to be installed and fixed externally, providing more operating space and improving the efficiency of installation and replacement.

Description

Technical Field

[0001] This invention belongs to the field of mold technology, specifically relating to a quick mold changing device. Background Technology

[0002] A quick-change mold unit is a device used for mold replacement, commonly found in manufacturing industries such as injection molding, die casting, and metal forming. The use of this device improves production flexibility and efficiency, especially in production environments requiring frequent mold changes, and is widely used in industries such as automotive, electronics, home appliances, and packaging. The main features and advantages of quick-change mold units include: reduced mold change time: Traditional mold change times may take several hours, while with a quick-change mold unit, change time can typically be reduced to a few minutes to a dozen minutes, thus significantly improving production line efficiency; strong adaptability: suitable for various types of molds, especially important in multi-variety, small-batch production. Due to the reduced mold change time, the production line can more frequently change production cycles to adapt to the needs of different products.

[0003] The ability to quickly change molds directly impacts production efficiency, especially for processing multi-variety, small-batch products. While various mold-changing devices exist on the market, most suffer from design flaws. Firstly, existing molds are typically fixed to the mold frame with screws. Although the frame has pre-drilled mounting holes, the actual installation and replacement process remains cumbersome, requiring precise alignment and allowing no deviation, hindering rapid installation and fixation. Secondly, existing devices lack flexible adjustment mechanisms, requiring molds to be hoisted into the device for installation. Due to space constraints, multiple operators are usually needed to complete the change, repeatedly adjusting the mold's position to ensure precise alignment. This not only wastes significant manpower and resources but also increases the workload of operators. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a quick mold changing device.

[0005] The technical solution adopted to solve the above technical problems is: a quick mold changing device, including a fixed support mechanism, the fixed support mechanism including a fixed base, a plurality of limiting rods fixedly connected to the top of the fixed base, a top fixed seat fixedly connected to the top of the plurality of limiting rods, and a bottom hydraulic cylinder and a top hydraulic cylinder respectively fixedly installed on the top of the fixed base and the top fixed seat.

[0006] A bottom lifting mechanism and a top lifting mechanism are slidably mounted on each of the multiple limiting rods, and the bottom hydraulic cylinder and the top hydraulic cylinder are used for lifting and adjusting the bottom lifting mechanism and the top lifting mechanism, respectively.

[0007] Both the bottom lifting mechanism and the top lifting mechanism are slidably equipped with sliding limit mechanisms. Both sets of sliding limit mechanisms are equipped with adjustable quick-fixing mechanisms, and the two sets of quick-fixing mechanisms are used to install the lower mold base and the upper mold base, respectively.

[0008] A sliding support mechanism is also fixedly installed on the set of sliding limit mechanisms located below, and a sliding adjustment mechanism for controlling the corresponding sliding limit mechanism to slide back and forth is also installed at the bottom of the bottom lifting mechanism.

[0009] Furthermore, the bottom lifting mechanism includes a lifting seat, and each corner of the lifting seat has a limiting hole. The lifting seat is sleeved on multiple limiting rods through multiple limiting holes. The top of the lifting seat has a movable slide groove, and the bottom of the movable slide groove also has two sets of through limiting slide grooves and positioning grooves.

[0010] Through the above technical solution, the lifting seat, as a set of lifting structures at the bottom, is mainly used to support a set of sliding limit mechanisms and quick fixing mechanisms. The sliding limit mechanisms and quick fixing mechanisms can be slidably adjusted on the lifting seat, so that the installation, fixing, disassembly, and replacement of the lower mold base can all be carried out outside the device, thus making it more convenient for technicians to operate. In addition, the lifting seat is fixed to the top of the bottom hydraulic cylinder, so that it can be freely raised and lowered under the drive of the bottom hydraulic cylinder. When it is necessary to change the mold, it can be lowered to the lowest installation height under the drive of the bottom hydraulic cylinder, so that the mold can be installed in a lowered position. This not only reduces the installation risks during the hoisting process, but also makes it more convenient for operators to install and fix the mold.

[0011] Furthermore, two symmetrically distributed directional grooves are provided at the bottom of the movable chute for guiding the movement of the sliding limiting mechanism.

[0012] The above technical solution enables the sliding limit mechanism to slide outward from the lifting seat, thereby making it easier to install and fix the lower mold base outside the device. This not only provides more operating space but also improves the efficiency of installation and replacement.

[0013] Furthermore, the sliding limiting mechanism includes a mounting plate that is slidably installed in the movable slide groove. Limiting slide rails are fixedly connected to both sides of the bottom of the mounting plate. Two symmetrically distributed longitudinal T-shaped limiting grooves are opened on both sides of the top of the mounting plate, and a transverse T-shaped limiting groove is also opened at the center of the top of the mounting plate.

[0014] Through the above technical solution, the sliding limit mechanism also serves as an auxiliary support structure. Meanwhile, the top of the mounting plate has a longitudinal T-shaped limit groove and a transverse T-shaped limit groove for quick adjustment of the quick fixing mechanism. In use, the quick fixing mechanism can quickly adjust its position on the longitudinal T-shaped limit groove and the transverse T-shaped limit groove according to the size of the mounting mold. After the position is adjusted, the corresponding nut can be quickly tightened using a power tool.

[0015] Furthermore, the two limiting slide rails are slidably installed in their respective directional slide grooves.

[0016] The above technical solution can guide and limit the movement of the mounting plate.

[0017] Furthermore, the quick-fixing mechanism includes two longitudinal adjustment mold frames, each with a horizontally penetrating guide groove. First locking bolts are installed at both ends of each longitudinal adjustment mold frame, and longitudinal positioning clamps are fixedly connected to the top of opposite sides of each longitudinal adjustment mold frame. Two sets of guide sliders are slidably connected within each guide groove, and a second locking bolt is fixedly connected to the top of each guide slider. A transverse adjustment mold frame is slidably installed on each of the two sets of second locking bolts. Adjustment holes corresponding to the second locking bolts are provided at the front and rear ends of each transverse adjustment mold frame. A third locking bolt is installed in the middle of each transverse adjustment mold frame. Transverse positioning clamps are fixedly connected to opposite sides of each transverse adjustment mold frame, and multiple locking knobs are threaded onto the transverse positioning clamps.

[0018] Through the above technical solution, the quick-fixing mechanism is the main component for fixing the mold. In use, the position of the longitudinal adjustment mold frame at the rear end can be adjusted according to the longitudinal width of the mold and fixed. After the lower mold base is hoisted to the top of the mounting plate, simply align the rear end of the lower mold base with the corresponding longitudinal adjustment mold frame. Its lateral position can be adjusted or not adjusted according to the actual situation, as long as the lower mold base is roughly located in the middle of the top of the mounting plate. Even if there is a slight error, it will not affect its subsequent installation. After the lower mold base is positioned, slide the set of longitudinal adjustment mold frames at the front end backward so that they cooperate with each other to quickly lock and fix the front and rear ends of the lower mold base. Then, slide the left and right sets of longitudinal and lateral adjustment mold frames to quickly clamp the left and right ends of the lower mold base. Finally, tighten the two sets of second and third locking bolts. To further improve the fixing effect of the lower mold base, multiple locking knobs can be used to further tighten and fix it, thereby preventing the mold from shaking during use.

[0019] Furthermore, the bottoms of the two sets of first locking bolts are slidably installed in two longitudinal T-shaped limiting grooves.

[0020] The above technical solution enables the two longitudinal adjustment mold frames to be freely adjusted along the direction of the two longitudinal T-shaped limiting grooves. After the adjustment is completed, the first locking bolt can be used to quickly lock and fix them.

[0021] Furthermore, the bottoms of both third locking bolts are slidably installed within the transverse T-shaped limiting groove.

[0022] The above technical solution enables the transverse adjustment mold frame to be positioned along the transverse T-shaped limiting groove. The front and rear ends of the transverse adjustment mold frame can be fixed to the longitudinal adjustment mold frame by the second locking bolt. The setting of the third locking bolt can further share the force of the longitudinal adjustment mold frame and also improve the stability of the transverse adjustment mold frame during use.

[0023] Furthermore, the sliding support mechanism includes a fixed bracket fixed to the bottom of the lower sliding limiting mechanism. The fixed bracket has movable pulleys installed on both sides of its bottom. In the retracted state, the tops of both ends of the fixed bracket are respectively housed in two limiting grooves.

[0024] Through the above technical solution, the sliding support mechanism is mainly used for auxiliary support during the movement of the sliding limit mechanism. In order to reduce the installation height of the lower mold base, the bottom hydraulic cylinder will drive the lifting seat to descend to the lowest installation height. At this time, the moving pulleys installed on both sides of the bottom of the fixed bracket will also directly contact the fixed base. As the sliding limit mechanism extends forward, the sliding support mechanism can play a better auxiliary support role for its front suspended part to ensure stability during the mold replacement process.

[0025] Furthermore, the sliding adjustment mechanism includes two connecting seats fixed to the bottom of the lower sliding limit mechanism. Telescopic cylinders are fixedly installed on both sides of the bottom of the lifting seat, and the front ends of the piston rods of the two telescopic cylinders are respectively fixedly connected to the corresponding connecting seats.

[0026] Through the above technical solution, the sliding adjustment mechanism is mainly used to control the adjustment of a set of sliding limit mechanisms located below. When it is working, it can drive the two connecting seats to move synchronously through the extension and retraction of the piston rods of the two telescopic cylinders, thereby driving the sliding limit mechanism to extend outward or retract and reset.

[0027] The beneficial effects of the present invention are as follows: (1) The present invention, by designing a bottom lifting mechanism, a top lifting mechanism, a sliding limit mechanism and a quick fixing mechanism, enables the mold to be installed and fixed outside the device, which not only provides more operating space, but also improves the efficiency of installation and replacement; (2) The present invention, by designing a flexibly adjustable quick fixing mechanism, enables the device to be quickly adjusted according to the size and specifications of the mold, and quickly completes the installation and fixing of the mold, which not only greatly improves its overall applicability, but also improves the replacement efficiency; (3) The present invention, through the quick fixing mechanism, enables the mold to be precisely adjusted during the replacement process. The mold base only needs to be roughly located in the middle of the mounting plate. Even if there is a slight error, it will not affect its subsequent installation. After the mold base is positioned, it can be quickly locked and fixed by two sets of longitudinal adjustment mold frames and transverse adjustment mold frames, thereby completing the entire installation work. Attached Figure Description

[0028] Figure 1 This is a first-view structural diagram of the present invention;

[0029] Figure 2 This is a second-view structural diagram of the present invention;

[0030] Figure 3 This is the front view of the present invention;

[0031] Figure 4 This is a schematic diagram of the installation structure of the bottom lifting mechanism of the present invention;

[0032] Figure 5 This is a schematic diagram of the installation structure of the sliding support mechanism of the present invention;

[0033] Figure 6 This is a schematic diagram of the installation structure of the sliding adjustment mechanism of the present invention;

[0034] Figure 7 This is a schematic diagram of the installation and fixing state of the lower mold base of the present invention;

[0035] Figure 8 This is a front view of the lower mold base in its installed state according to the present invention;

[0036] Figure 9 yes Figure 8 Sectional view along line AA;

[0037] Figure 10 This is a right view of the lower mold base in the installation state of the present invention;

[0038] Figure 11 yes Figure 10 Sectional view along the BB direction;

[0039] Figure 12This is a schematic diagram of the installation state structure of the quick-fixing mechanism of the present invention;

[0040] Figure 13 This is a first-view structural schematic diagram of the quick-fixing mechanism of the present invention;

[0041] Figure 14 This is a second-view structural schematic diagram of the quick-fixing mechanism of the present invention.

[0042] Reference numerals: 1. Fixed support mechanism; 101. Fixed base; 102. Limiting rod; 103. Top fixed seat; 2. Bottom hydraulic cylinder; 3. Bottom lifting mechanism; 301. Lifting seat; 302. Limiting hole; 303. Moving slide; 304. Limiting slide; 305. Positioning groove; 4. Top lifting mechanism; 5. Top hydraulic cylinder; 6. Sliding limiting mechanism; 601. Mounting plate; 602. Limiting slide rail; 603. Longitudinal T-shaped limiting groove; 604. Transverse T-shaped limiting groove; 7. Quick fixing mechanism; 7 701. Longitudinal adjusting mold frame; 702. Guide slide; 703. First locking bolt; 704. Longitudinal positioning clamp; 705. Guide slider; 706. Second locking bolt; 707. Lateral adjusting mold frame; 708. Adjusting hole; 709. Third locking bolt; 710. Lateral positioning clamp; 711. Locking knob; 8. Sliding support mechanism; 801. Fixed bracket; 802. Moving pulley; 9. Sliding adjustment mechanism; 901. Connecting seat; 902. Telescopic cylinder; 10. Lower mold base; 11. Upper mold base. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0044] like Figures 1-14 As shown, a quick mold changing device in this embodiment includes a fixed support mechanism 1. The fixed support mechanism 1 includes a fixed base 101. A plurality of limiting rods 102 are fixedly connected to the top of the fixed base 101. A top fixed seat 103 is fixedly connected to the top of the plurality of limiting rods 102. A bottom hydraulic cylinder 2 and a top hydraulic cylinder 5 are respectively fixedly installed on the top of the fixed base 101 and the top fixed seat 103.

[0045] Multiple limit rods 102 are respectively slidably mounted with bottom lifting mechanism 3 and top lifting mechanism 4 arranged vertically. Bottom hydraulic cylinder 2 and top hydraulic cylinder 5 are used for lifting and adjusting bottom lifting mechanism 3 and top lifting mechanism 4, respectively.

[0046] Regarding bottom lifting mechanism 3, please refer to... Figures 1-6The bottom lifting mechanism 3 includes a lifting seat 301. Limiting holes 302 are provided at the corners of the lifting seat 301. The lifting seat 301 is sleeved on multiple limiting rods 102 through multiple limiting holes 302. A movable slide groove 303 is provided on the top of the lifting seat 301, and two sets of through limiting slide grooves 304 and positioning grooves 305 are respectively provided on the bottom of the movable slide groove 303. As a set of lifting structures at the bottom, the lifting seat 301 is mainly used to support one set of sliding limiting mechanisms 6 and quick fixing mechanisms 7. The sliding limiting mechanisms 6 and quick fixing mechanisms 7 can be slidably adjusted on the lifting seat 301, so that the installation, fixing and disassembly of the lower mold base 10 can be carried out outside the device, which makes it more convenient for technicians to operate.

[0047] In this embodiment, the lifting seat 301 is fixed to the top of the bottom hydraulic cylinder 2, so that it can be freely raised and lowered under the drive of the bottom hydraulic cylinder 2. When it is necessary to change the mold, it can be lowered to the lowest installation height under the drive of the bottom hydraulic cylinder 2, so that the mold can be installed in a lowered position. This not only reduces the installation risks during the hoisting process, but also makes it more convenient for operators to install and fix the mold.

[0048] In this embodiment, two symmetrically distributed directional grooves are provided at the bottom of the movable sliding groove 303 for guiding the movement of the sliding limiting mechanism 6, so that the sliding limiting mechanism 6 can slide outward from the lifting seat 301, thereby making it easier to install and fix the lower mold base 10 outside the device. This not only provides more operating space, but also improves the efficiency of installation and replacement.

[0049] Regarding the sliding limit mechanism 6, please refer to... Figures 5-12 Both the bottom lifting mechanism 3 and the top lifting mechanism 4 are slidably equipped with sliding limiting mechanisms 6. The sliding limiting mechanism 6 includes a mounting plate 601 slidably installed in the movable slide groove 303. Limiting slide rails 602 are fixedly connected to both sides of the bottom of the mounting plate 601. Two symmetrically distributed longitudinal T-shaped limiting grooves 603 are opened on both sides of the top of the mounting plate 601, and a transverse T-shaped limiting groove 604 is also opened at the center of the top of the mounting plate 601. The sliding limiting mechanism 6 also serves as an auxiliary support structure. At the same time, the top of the mounting plate 601 has longitudinal T-shaped limiting grooves 603 and transverse T-shaped limiting grooves 604 for quick adjustment by the quick fixing mechanism 7. In use, the quick fixing mechanism 7 can quickly adjust the position on the longitudinal T-shaped limiting grooves 603 and transverse T-shaped limiting grooves 604 according to the size of the installation mold. After the position is adjusted, the corresponding nuts can be quickly tightened using power tools.

[0050] In this embodiment, the two limiting slide rails 602 are slidably installed in the corresponding directional slide grooves, thereby guiding and limiting the movement of the mounting plate 601.

[0051] Regarding the quick-fixing mechanism 7, please refer to... Figures 5-14 Both sets of sliding limit mechanisms 6 are equipped with adjustable quick-fixing mechanisms 7, and the two sets of quick-fixing mechanisms 7 are used to install the lower mold base 10 and the upper mold base 11 respectively; the quick-fixing mechanism 7 includes two longitudinal adjustment mold frames 701, each of which has a horizontally penetrating guide groove 702, and both ends of the two longitudinal adjustment mold frames 701 are equipped with first locking bolts 703, and the tops of the opposite sides of the two longitudinal adjustment mold frames 701 are fixedly connected with longitudinal positioning clamps 704. Two sets of guide sliders 705 are slidably connected within each guide groove 702. A second locking bolt 706 is fixedly connected to the top of each guide slider 705. A transverse adjustment mold frame 707 is slidably mounted on each of the two sets of second locking bolts 706. Adjustment holes 708 corresponding to the second locking bolts 706 are provided at the front and rear ends of each transverse adjustment mold frame 707. A third locking bolt 709 is installed in the middle of each transverse adjustment mold frame 707. The opposite sides of the two transverse adjustment mold frames 707 are fixedly connected... The device includes a transverse positioning clamp 710 with multiple locking knobs 711 threaded onto it. The quick-fixing mechanism 7 is the main component for fixing the mold. In use, the longitudinal adjustment mold frame 701 at the rear end can be adjusted according to the longitudinal width of the mold and fixed. After the lower mold base 10 is hoisted to the top of the mounting plate 601, the rear end of the lower mold base 10 is simply pressed against the corresponding longitudinal adjustment mold frame 701. Its transverse position can be adjusted or not adjusted according to the actual situation. As long as the lower mold base 10 is roughly located in the middle of the top of the mounting plate 601, even if there is a slight error, it will not affect its subsequent installation. After the lower mold base 10 is positioned, the set of longitudinal adjustment mold frames 701 at the front end is slid backward to cooperate with each other and quickly lock and fix the front and rear ends of the lower mold base 10. Then, the two sets of longitudinal and transverse adjustment mold frames 707 on the left and right sides are slid to quickly clamp the left and right ends of the lower mold base 10. Finally, the two sets of second locking bolts 706 and third locking bolts 709 are locked.

[0052] Furthermore, in this embodiment, to further improve the fixing effect on the lower mold base 10, multiple locking knobs 711 can be used to further tighten and fix it, thereby preventing the mold from shaking during use.

[0053] In this embodiment, the bottoms of the two sets of first locking bolts 703 are slidably installed in the two longitudinal T-shaped limiting grooves 603, so that the two longitudinal adjusting mold frames 701 can be freely adjusted along the direction of the two longitudinal T-shaped limiting grooves 603. After the adjustment is completed, the first locking bolts 703 can be used to quickly lock and fix the mold.

[0054] In this embodiment, the bottoms of the two third locking bolts 709 are slidably installed in the transverse T-shaped limiting groove 604, so that the transverse adjusting mold frame 707 can be adjusted in position along the direction of the transverse T-shaped limiting groove 604. The front and rear ends of the transverse adjusting mold frame 707 can be fixed to the longitudinal adjusting mold frame 701 by the second locking bolt 706. The setting of the third locking bolt 709 can further share the force of the longitudinal adjusting mold frame 701, and also improve the stability of the transverse adjusting mold frame 707 during use.

[0055] Regarding sliding support mechanism 8, please refer to... Figures 5-6 A sliding support mechanism 8 is also fixedly installed on a set of sliding limiting mechanisms 6 located below. The sliding support mechanism 8 includes a fixed bracket 801 fixed to the bottom of the lower sliding limiting mechanism 6. Movable pulleys 802 are installed on both sides of the bottom of the fixed bracket 801. In the retracted state, the top of both ends of the fixed bracket 801 are respectively stored in two limiting slide grooves 304. The sliding support mechanism 8 is mainly used for auxiliary support during the movement of the sliding limiting mechanism 6. In order to reduce the installation height of the lower mold base 10, the bottom hydraulic cylinder 2 will drive the lifting seat 301 to descend to the lowest installation height. At this time, the movable pulleys 802 installed on both sides of the bottom of the fixed bracket 801 will also directly contact the fixed base 101. As the sliding limiting mechanism 6 extends forward and slides, the sliding support mechanism 8 can play a better auxiliary support role for its front end suspended part to ensure stability during the mold changing process.

[0056] Regarding the sliding adjustment mechanism 9, please refer to... Figure 6 The bottom of the lifting mechanism 3 is also equipped with a sliding adjustment mechanism 9 for controlling the corresponding sliding limit mechanism 6 to slide back and forth. The sliding adjustment mechanism 9 includes two connecting seats 901 fixed to the bottom of the lower sliding limit mechanism 6. Telescopic cylinders 902 are fixedly installed on both sides of the bottom of the lifting seat 301, and the front ends of the piston rods of the two telescopic cylinders 902 are fixedly connected to the corresponding connecting seats 901 respectively. The sliding adjustment mechanism 9 is mainly used to control the adjustment of the lower set of sliding limit mechanisms 6. When it is working, it can drive the two connecting seats 901 to move synchronously through the extension and retraction of the piston rods of the two telescopic cylinders 902, thereby driving the sliding limit mechanism 6 to extend outward or retract and reset.

[0057] The working principle of this embodiment is as follows: When installing the mold, the bottom hydraulic cylinder 2 first drives the lifting seat 301 to descend to the lowest installation height. At this time, the movable pulleys 802 installed on both sides of the bottom of the fixed bracket 801 will also directly contact the fixed base 101. Then, the piston rods of the two telescopic cylinders 902 drive the sliding limit mechanism 6 to extend outward, so that the sliding limit mechanism 6 located below moves to the outside of the device.

[0058] At this point, the operator uses a small hoist to lift the mold to be replaced (lower mold base 10 and upper mold base 11 in the mold-closed state) to the top of the mounting plate 601. Then, the rear end of the lower mold base 10 is pressed against the corresponding longitudinal adjustment mold frame 701. After the rear end of the lower mold base 10 is positioned, the front set of longitudinal adjustment mold frames 701 is slid backward to make them cooperate with each other to quickly lock and fix the front and rear ends of the lower mold base 10. Then, the left and right sets of longitudinal and transverse adjustment mold frames 707 are slid to quickly clamp the left and right ends of the lower mold base 10. Finally, the two sets of second locking bolts 706 and third locking bolts 709 are locked.

[0059] After the lower mold base 10 is fixed, the sliding adjustment mechanism 9 drives the sliding limit mechanism 6 to retract and reset. At this time, the piston rods of the bottom hydraulic cylinder 2 and the top hydraulic cylinder 5 extend synchronously until the bottom surface of the upper sliding limit mechanism 6 is in contact with the top installation position of the upper mold base 11. Then, the upper mold base 11 can be installed and fixed using the top quick fixing mechanism 7 in the same way.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A quick mold changing device, comprising a fixed support mechanism (1), wherein the fixed support mechanism (1) comprises a fixed base (101), a plurality of limiting rods (102) are fixedly connected to the top of the fixed base (101), and a top fixed seat (103) is fixedly connected to the top of the plurality of limiting rods (102), characterized in that: The bottom hydraulic cylinder (2) and the top hydraulic cylinder (5) are respectively fixedly installed on the top of the fixed base (101) and the top fixed base (103); A bottom lifting mechanism (3) and a top lifting mechanism (4) are slidably installed on each of the multiple limiting rods (102). The bottom hydraulic cylinder (2) and the top hydraulic cylinder (5) are used for the lifting adjustment of the bottom lifting mechanism (3) and the top lifting mechanism (4), respectively. The bottom lifting mechanism (3) includes a lifting seat (301), and each corner of the lifting seat (301) is provided with a limiting hole (302). The lifting seat (301) is sleeved on a plurality of limiting rods (102) through a plurality of limiting holes (302). The top of the lifting seat (301) is provided with a moving slide groove (303), and the bottom of the moving slide groove (303) is provided with two sets of through limiting slide grooves (304) and positioning grooves (305). Both the bottom lifting mechanism (3) and the top lifting mechanism (4) are slidably equipped with sliding limiting mechanisms (6). The bottom of the moving slide (303) is also provided with two symmetrically distributed directional slides for guiding the movement of the sliding limiting mechanism (6). The sliding limiting mechanism (6) includes a mounting plate (601) that is slidably installed in the movable slide groove (303). Limiting slide rails (602) are fixedly connected to both sides of the bottom of the mounting plate (601). Two symmetrically distributed longitudinal T-shaped limiting grooves (603) are opened on both sides of the top of the mounting plate (601), and a transverse T-shaped limiting groove (604) is also opened at the center of the top of the mounting plate (601). Both sets of sliding limiting mechanisms (6) are equipped with adjustable quick fixing mechanisms (7), and the two sets of quick fixing mechanisms (7) are used to install the lower mold base (10) and the upper mold base (11), respectively. The quick-fixing mechanism (7) includes two longitudinal adjustment mold frames (701). Each of the two longitudinal adjustment mold frames (701) has a horizontally penetrating guide groove (702). Both ends of the two longitudinal adjustment mold frames (701) are equipped with first locking bolts (703). The tops of the opposite sides of the two longitudinal adjustment mold frames (701) are fixedly connected to longitudinal positioning clamps (704). Two sets of guide sliders (705) are slidably connected in the two guide grooves (702). The top of each guide slider (705) is fixedly connected to a second lock. The two sets of second locking bolts (706) are slidably mounted with transverse adjustment mold frames (707). The front and rear ends of the two transverse adjustment mold frames (707) are provided with adjustment holes (708) corresponding to the second locking bolts (706). The middle part of the two transverse adjustment mold frames (707) is equipped with a third locking bolt (709). The opposite sides of the two transverse adjustment mold frames (707) are fixedly connected with transverse positioning clamps (710), and multiple locking knobs (711) are threaded on the transverse positioning clamps (710). A sliding support mechanism (8) is also fixedly installed on a set of sliding limit mechanisms (6) located below, and a sliding adjustment mechanism (9) for controlling the corresponding sliding limit mechanism (6) to slide back and forth is also installed at the bottom of the bottom lifting mechanism (3); The sliding support mechanism (8) includes a fixed bracket (801) fixed to the bottom of the lower sliding limit mechanism (6). The fixed bracket (801) has movable pulleys (802) installed on both sides of its bottom. In the retracted state, the top of both ends of the fixed bracket (801) are respectively stored in two limit slide grooves (304). The sliding adjustment mechanism (9) includes two connecting seats (901) fixed to the bottom of the lower sliding limit mechanism (6). Telescopic cylinders (902) are fixedly installed on both sides of the bottom of the lifting seat (301), and the front ends of the piston rods of the two telescopic cylinders (902) are fixedly connected to the corresponding connecting seats (901).

2. The quick mold changing device according to claim 1, characterized in that, The two limiting slide rails (602) are respectively slidably installed in the corresponding directional slide grooves.

3. The quick mold changing device according to claim 1, characterized in that, The bottoms of the two sets of first locking bolts (703) are slidably installed in two longitudinal T-shaped limiting grooves (603).

4. The quick mold changing device according to claim 1, characterized in that, The bottoms of the two third locking bolts (709) are slidably installed in the transverse T-shaped limiting groove (604).

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