A quick-change structure of a packaging machine mold

Abstract

The utility model discloses a kind of packaging machine mould quick-change structure, it is related to packaging machine equipment technical field, to solve the problem of long time consumption of existing packaging machine mould replacement, cumbersome operation. The structure includes main fixed plate, connecting rod, button, wedge block, spring, positioning pin and jack screw;Main fixed plate is equipped with connecting rod hole, button hole and jack screw thread hole, connecting rod is passed through connecting rod hole, its both ends are connected with button and wedge block respectively, spring is sleeved on connecting rod and located between main fixed plate and wedge block;Positioning pin is located on the mould plate to be replaced, and its head is provided with chamfer;Jack screw is screwed into jack screw thread hole and is tightly pressed spring. When pressing button, connecting rod drives wedge block to compress spring, and the locking of positioning pin is released;After button is released, spring resets and pushes wedge block to clamp positioning pin, and mould is quickly locked. The utility model does not need screw fixing, shortens mould replacement time, reduces operating strength, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, specifically to a quick-change structure for packaging machine molds. Background Technology

[0002] In the packaging machine manufacturing industry, especially in sanitary napkin packaging machines, molds are frequently replaced to adapt to the production needs of different product specifications. Currently, the turntable assembly of sanitary napkin packaging machines typically uses cylindrical head hexagonal screws to directly lock the mold onto the turntable. This fixing method has significant drawbacks: when changing the mold, multiple screws need to be disassembled and installed one by one, a time-consuming process that severely impacts production efficiency; furthermore, after each replacement, each screw must be carefully checked for tightness. If any screw is not tightened, it can easily cause the mold to loosen during high-speed operation, leading to production malfunctions or even safety hazards.

[0003] To address the aforementioned issues, this invention proposes a quick-change structure for packaging machine molds. Through mechanical linkage design, it enables rapid locking and unlocking of the molds, eliminating the need for repeated screw disassembly, significantly reducing replacement time and operational difficulty. Utility Model Content

[0004] This utility model aims to solve the technical problems of existing packaging machine molds being fixed with screws, which result in time-consuming replacements, cumbersome operations, and the need for frequent checks on the locking status.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A quick-change structure for a packaging machine mold includes a main fixing plate, a connecting rod, a button, a wedge block, a spring, a positioning pin, and a set screw. The main fixing plate has a connecting rod hole, a button hole, and a set screw threaded hole extending through its thickness direction. The connecting rod slidably passes through the connecting rod hole, with one end passing through the button hole and fixedly connected to the button, and the other end fixedly connected to the wedge block. The spring is sleeved on the connecting rod, with one end abutting against the side of the main fixing plate facing the wedge block, and the other end abutting against the wedge block. The positioning pin is used to fixally connect to the mold plate to be replaced, and the positioning pin can cooperate with the wedge block to lock or unlock the mold plate. The set screw is threaded into the set screw threaded hole, and the end of the set screw abuts against the spring.

[0006] Furthermore, the number of positioning pins is four, and the four positioning pins are distributed in a rectangular shape on the mold plate, and the head of the positioning pin is chamfered.

[0007] Furthermore, the specification of the set screw threaded hole is M8, and the outer surface of the set screw is coated with thread-locking adhesive.

[0008] Furthermore, both the button and the wedge block are detachably connected to both ends of the connecting rod by screws.

[0009] Furthermore, the main fixing plate has a recessed platform on the side facing the button that communicates with the button hole, and part of the button structure is embedded in the recessed platform.

[0010] Furthermore, the wedge block has an inclined surface on the side facing the positioning pin, and the inclined surface can fit against the outer peripheral wall of the positioning pin.

[0011] Furthermore, the main fixing plate is provided with multiple fixing holes for fixing the main fixing plate to the packaging machine turntable using screws. The main fixing plate also has at least four fixing holes, which are evenly distributed along the edge of the main fixing plate.

[0012] This utility model has the following beneficial effects: Reduce changeover time: The mechanical linkage structure driven by buttons enables quick locking and unlocking of the mold without the need to remove screws, greatly improving production efficiency. Attached Figure Description

[0013] Figure 1 This utility model relates to a quick-change structure for packaging machine molds.

[0014] Figure 2 This is a partial structural diagram of a quick-change mold structure for a packaging machine according to the present invention.

[0015] Figure 3 This is a cross-sectional view of the present invention. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1-3 As shown, the quick-change structure for packaging machine molds disclosed in this embodiment is installed on the packaging machine turntable, and it mainly consists of a main fixing plate 1, a connecting rod 2, a button 3, a wedge block 4, a spring 5, a positioning pin 6, and a set screw 7.

[0018] The main fixing plate 1 is fixed to the packaging machine turntable 21 with screws through four fixing holes on its edge. The main fixing plate 1 has a connecting rod hole 11 (for the connecting rod 2 to pass through), a button hole 12 on one side of the connecting rod hole 11 (for the button 3 to protrude), and a set screw threaded hole 13 (M8 specification, for installing the set screw 7) on the other side. The main fixing plate 1 has a recessed platform 14 on the side facing the button 3, communicating with the button hole 12, so that the button 3 is partially embedded therein, preventing accidental unlocking due to accidental contact.

[0019] The connecting rod 2 is a cylindrical rod with a diameter of 8mm, which slides through the connecting rod hole 11. One end passes through the button hole 12 and is fixed to the button 3 by screws. The other end is fixed to the wedge block 4 by screws, forming a button-connecting rod-wedge block linkage assembly.

[0020] Spring 5 is sleeved on connecting rod 2. In its natural state, spring 5 is slightly compressed, and pushes wedge block 4 out through elastic force. The end of set screw 7 abuts against spring 5 and is used to adjust the initial compression of spring 5 to ensure stable elastic force.

[0021] Four locating pins 6 are fixed to the mold plate 8 to be replaced by welding or screws, arranged in a rectangular pattern (10cm spacing between adjacent pins). The wedge block 4 has an inclined surface 41 (15° inclination angle) on its side that adapts to the outer peripheral wall of the locating pin 6. When the wedge block 4 moves to the left, the inclined surface 41 contacts the locating pin 6 and generates radial pressure, achieving locking. In this invention, the locking method is not specifically limited. For example, the locating pin 6 can have a groove on its side, and the wedge block 4 can engage with the groove after movement, also achieving locking; other locking methods include pin hole interference fit, magnetic attraction, etc. Figure 2 As shown, the positioning pin 6 is provided with a groove structure 61, and the inclined surface 41 is inserted into the groove structure 61 to achieve engagement.

[0022] This invention utilizes a spring to provide continuous elasticity, ensuring the wedge block tightly engages with the locating pin, preventing loosening issues that may occur with screw fixing. The chamfered head of the locating pin ensures smooth insertion, and the rectangular distribution of the four locating pins enhances the stability of mold installation. The set screw is coated with thread-locking adhesive and presses against the spring to prevent positional shift due to vibration during long-term use. All components function through mechanical cooperation, reducing vulnerable parts and extending service life.

[0023] Working process description, mold installation (locking process): Align the positioning pin 6 of the mold plate 8 with the positioning hole of the main fixing plate 1, press the button 3. At this time, the connecting rod 2 drives the wedge block 4 to move, the spring 5 is compressed (energy storage state), the contact between the wedge block 4 and the positioning pin 6 is released, leaving enough space for insertion; after the positioning pin 6 is smoothly inserted into the positioning hole, release the button 3, the spring 5 releases its elastic force to push the wedge block 4 to reset, its inclined surface 41 tightly fits the outer peripheral wall of the positioning pin 6, and under the action of radial force, the positioning pin 6 is locked, completing the mold locking. In this utility model, the button 3 is located in the recessed platform (only 5mm exposed). During daily equipment operation, it is necessary to avoid materials, tools or limbs accidentally touching the button - if accidentally pressed, it may cause the wedge block to unlock, causing the mold to loosen. The recessed platform design can reduce the probability of accidental touch.

[0024] Mold replacement (unlocking process): When the mold needs to be replaced, press button 3, the connecting rod 2 drives the wedge block 4 to move, the spring 5 is compressed again, the inclined surface 41 of the wedge block 4 separates from the positioning pin 6, and the lock is released; at this time, the mold plate 8 can be pulled out directly, and the above locking steps can be repeated after replacing the new mold.

[0025] The recessed platform 14 of the main fixing plate 1 limits the extension height of the button 3 (only 5mm protrusion), preventing accidental button pressing due to material collision during packaging machine operation and improving safety. The inclined surface 41 of the wedge block 4 forms a wedge-tightening effect with the positioning pin 6. The greater the elastic force of the spring 5, the stronger the clamping force of the wedge block on the positioning pin, ensuring that the mold does not shake during high-speed operation.

[0026] The rectangular distribution of the four positioning pins 6 ensures that the connection points between the mold plate 8 and the main fixing plate 1 are symmetrically distributed, preventing mold offset caused by uneven force and ensuring packaging accuracy (e.g., the sealing alignment error of sanitary napkin packaging is ≤0.5mm). This embodiment replaces screw fixing with mechanical linkage. Actual testing shows that mold replacement time has been reduced from the traditional 40 minutes to 90 seconds, and there has been no loosening after 1000 hours of continuous operation, significantly improving the production efficiency and stability of the packaging machine.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick-change structure for packaging machine molds, characterized in that, The system includes a main fixing plate, a connecting rod, a button, a wedge block, a spring, a locating pin, and a set screw. The main fixing plate has a connecting rod hole, a button hole, and a set screw threaded hole extending through its thickness. The connecting rod slides through the connecting rod hole, with one end passing through the button hole and fixedly connected to the button, and the other end fixedly connected to the wedge block. The spring is sleeved on the connecting rod, with one end abutting against the side of the main fixing plate facing the wedge block, and the other end abutting against the wedge block. The locating pin is used to fixally connect to the mold plate to be replaced, and the locating pin can cooperate with the wedge block to lock or unlock the mold plate. The set screw is threaded into the set screw threaded hole, and the end of the set screw abuts against the spring.

2. The quick-change structure for packaging machine molds according to claim 1, characterized in that, The number of positioning pins is 4, and the 4 positioning pins are distributed in a rectangular shape on the mold plate, and the head of the positioning pin is chamfered.

3. The quick-change structure for packaging machine molds according to claim 1, characterized in that, The set screw thread hole is M8, and the outer surface of the set screw is coated with thread-locking adhesive.

4. The quick-change structure for packaging machine molds according to claim 1, characterized in that, Both the button and the wedge are detachably connected to both ends of the connecting rod by screws.

5. The quick-change structure for packaging machine molds according to claim 1, characterized in that, The main fixing plate has a recessed platform on the side facing the button that communicates with the button hole, and part of the button's structure is embedded in the recessed platform.

6. The quick-change structure for packaging machine molds according to claim 1, characterized in that, The wedge block has an inclined surface on the side facing the positioning pin, and the inclined surface has an inclination angle of 15°. The wedge block is locked by fitting the inclined surface against the outer peripheral wall of the positioning pin or by inserting it into the positioning pin groove structure.

7. The quick-change structure for packaging machine molds according to claim 1, characterized in that, The main fixing plate is also provided with at least 4 fixing holes, which are evenly distributed along the edge of the main fixing plate, for fixing the main fixing plate to the packaging machine turntable by screws.

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