A plastic packaging bottle blow molding die capable of quick die change
Patent Information
- Application Number
- CN202521912953.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-05
AI Technical Summary
[0003]但是，目前市面上现有的塑料包装瓶吹制成型模具大多采用螺栓、销钉等紧固件进行连接固定，在更换模具时，需要操作人员使用工具逐一拆卸和安装大量紧固件，导致操作流程繁琐、耗时较长，较为不便，且目前市面上现有的塑料包装瓶吹制成型模具大多对接的紧密性较低，两半模具之间容易存在较大的缝隙，使得塑料成品表面上容易产生相应的痕迹，降低了生产质量
1、本实用新型提出的一种可快速换模的塑料包装瓶吹制成型模具，通过连接机构中的连接板与固定座上的连接槽滑动连接，将模具本体初步固定，配合蜗杆驱动蜗轮带动螺纹筒转动，利用螺纹筒与移动杆之间的螺纹连接，使移动杆能够伸出或缩回螺纹筒，改变移动杆与连接板的卡接状态，进而便于工作人员拆装模具，降低了更换模具的难度和耗时。
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Figure CN224898048U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blow molding mold technology, and in particular to a blow molding mold for plastic packaging bottles that allows for quick mold changes. Background Technology
[0002] Blow molding is a manufacturing process mainly used for thermoplastic materials. It involves forming a tubular preform from the raw material, heating it to a molten state, and then blowing compressed air into the tube to make it expand like a balloon, adhering tightly to the inner wall of the mold. After cooling and solidification, a hollow product is obtained. Blow molding molds for plastic packaging bottles are tools used to produce plastic packaging bottles by allowing molten plastic to expand and solidify.
[0003] However, most of the existing plastic bottle blow molding molds on the market are connected and fixed with fasteners such as bolts and pins. When changing molds, operators need to use tools to disassemble and install a large number of fasteners one by one, which makes the operation process cumbersome, time-consuming and inconvenient. In addition, most of the existing plastic bottle blow molding molds on the market have low tightness, and there are large gaps between the two halves of the mold, which makes it easy to leave marks on the surface of the plastic product and reduce the production quality.
[0004] Therefore, those skilled in the art have provided a blow molding die for plastic packaging bottles that allows for quick mold changes, in order to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a plastic packaging bottle blow molding mold that can be quickly changed. The connecting plate in the connecting mechanism is slidably connected to the connecting groove, and the worm gear drives the worm wheel to drive the threaded cylinder, changing the snap-fit state between the moving rod and the connecting plate, which facilitates mold replacement. The sealing push rod in the fastening mechanism pushes the top block to make the pawl rotate and snap-fit with the bottom surface inside the second fixed frame, so that the molds fit together more tightly.
[0006] To achieve the above objectives, this utility model provides the following technical solution: A quick-change plastic packaging bottle blow molding mold includes two mold bodies and two fixed seats. Each fixed seat has a connecting mechanism inside, which includes two connecting plates, two threaded cylinders, and two worm gears. Each mold body has a connecting plate fixedly connected to the side of the fixed seat. The upper and lower ends of the outer wall of the front end of the fixed seat are provided with connecting grooves, which are slidably connected to the connecting plates. Each fixed seat has a rotating groove in the middle of its interior. Each threaded cylinder has a worm wheel fixedly connected to the middle of its outer wall, which meshes with the worm gears. Each threaded cylinder has a moving rod threaded through the fixed seat at both the upper and lower ends. The side of the moving rod away from the center of the threaded cylinder passes through the fixed seat and is snapped into the connecting plate. The front and rear ends of the mold body are provided with fastening mechanisms. The fastening mechanisms include four first fixing frames, four second fixing frames, and four return springs. The inner walls of the front and rear ends of the first fixing frames are rotatably connected to two claws. The top and bottom surfaces inside the second fixing frames are engaged with the claws. The top and bottom surfaces inside the first fixing frames are fixedly connected to tension springs. An air chamber is opened in the middle of the first fixing frame. A sealing push rod is fixedly connected to the other side of each return spring. One side of each sealing push rod passes through the first fixing frame and is fixedly connected to a top block. Through the above technical solution, the mold body is initially fixed by sliding the connecting plate and the connecting groove on the fixed seat. The worm gear drives the worm wheel to rotate the threaded cylinder. The threaded connection between the threaded cylinder and the moving rod allows the moving rod to extend or retract from the threaded cylinder, changing the snap-fit state between the moving rod and the connecting plate, which facilitates mold replacement by the operator. In addition, high-pressure gas pushes the sealing push rod, causing the top block to push the pawl to rotate and snap-fit with the bottom surface inside the second fixed frame, thereby improving the tightness of the two mold halves and reducing the gap between the molds.
[0007] Furthermore, a sliding groove is provided at each of the four corners of the outer wall of one side of the mold body, and a buffer spring is fixedly connected to the inner wall of the other side of the sliding groove, and a buffer rod is fixedly connected to one side of the buffer spring. Through the above technical solution, the buffer spring fixedly connected inside the slide groove can apply a certain force to the buffer rod, so that the buffer rod can be kept out of the slide groove, and the existence of the slide groove can guide the movement direction of the buffer rod.
[0008] Furthermore, all the buffer rods slide inside the slide groove, and each of the four corners of the outer wall of the other side of the mold body is provided with a docking groove. One side of each buffer rod passes through the slide groove and fits against the inner wall of the docking groove side. The above technical solution allows the buffer rod to move inside the slide groove, so that when the two mold bodies are in contact with each other, the buffer rod pushes the buffer spring to compress, reducing the impact force between the molds. At the same time, the buffer rod is inserted into the mating groove, which allows the two mold bodies to fit together accurately and reduce offset.
[0009] Furthermore, the upper and lower ends of the outer wall of the threaded cylinder are rotatably connected to the fixed seat, the rear end of the worm is rotatably connected to the inner wall of the rear end of the rotating groove, and the front end of the worm passes through the fixed seat and is fixedly connected to a hexagonal block. Through the above technical solution, the hexagonal block fixedly connected to the worm allows the operator to use a wrench or other tools to drive the worm to rotate. The meshing connection between the worm and the worm wheel enables the worm wheel to drive the threaded cylinder to rotate on the fixed seat. Furthermore, the threaded connection between the threaded cylinder and the moving rod allows the moving rod to extend or retract the threaded cylinder.
[0010] Furthermore, limit grooves are provided on both sides of the outer wall of the movable rod, and the limit grooves are slidably connected to the fixed seat; By using the above technical solution, two limiting grooves are opened on the moving rod, and the limiting grooves are slidably connected to the fixed seat, so that the moving rod is restricted from rotating and will not rotate with the threaded cylinder, allowing the threaded cylinder to be properly threadedly connected to the moving rod.
[0011] Furthermore, the upper and lower ends of the front and rear outer walls of one mold body are fixedly connected to two first fixing frames, and the upper and lower ends of the front and rear outer walls of one mold body are fixedly connected to two second fixing frames. The above technical solution uses multiple bolts to fix the first and second fixing frames to the mold body, and also uses multiple bolts to fix the connecting plate to the mold body. This makes it easy for workers to remove the first fixing frame, the second fixing frame, the connecting plate and the mold body, making it convenient to inspect or replace damaged parts.
[0012] Furthermore, the side of the tension spring closest to the center of the first fixed frame is fixedly connected to the claw, and the inner wall of the air cavity side is fixedly connected to the return spring. Through the above technical solution, the tension spring fixedly connected inside the first fixed frame acts on the claw, so that when the top block does not apply force to the claw, the claw can return to its original position and maintain the engagement state with the second fixed frame. The return spring inside the air chamber acts on the sealing push rod, so that when no high-pressure gas is introduced into the air chamber, the sealing push rod can drive the top block to return to its original state.
[0013] Furthermore, the sealing push rods all slide inside the air chamber, one side of the top block is in contact with the claw, and the inner wall of the other side of the air chamber is connected to a connecting pipe. Through the above technical solution, high-pressure air can be introduced into the air cavity through the connecting pipe that is connected to the first fixed frame and the air cavity, which pushes the sealing push rod to move, thereby allowing the top block to push the claw to rotate and maintain the locking state of the second fixed frame. The sealing push rod is fitted with a sealing ring, which can improve the sealing performance and prevent gas leakage inside the air cavity.
[0014] This utility model has the following beneficial effects: 1. The present invention proposes a quick-change plastic packaging bottle blow molding mold. The mold body is initially fixed by sliding connection between the connecting plate in the connecting mechanism and the connecting groove on the fixed seat. The worm gear drives the worm wheel to rotate the threaded cylinder. The threaded connection between the threaded cylinder and the moving rod allows the moving rod to extend or retract from the threaded cylinder, changing the snap-fit state between the moving rod and the connecting plate. This makes it easier for workers to disassemble and assemble the mold, reducing the difficulty and time consumption of changing the mold.
[0015] 2. The present invention proposes a quick-change mold for blowing plastic packaging bottles. High-pressure gas pushes the sealing push rod in the fastening mechanism to move inside the air chamber, causing the top block fixedly connected to the sealing push rod to push the claw to rotate and engage with the bottom surface inside the second fixed frame. This makes the two halves of the mold fit more tightly, reduces the gap between the molds, avoids the formation of marks on the surface of the finished plastic product, and improves production quality. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the main structure of a quick-change plastic packaging bottle blow molding mold proposed in this utility model; Figure 2 An exploded view of a quick-change plastic packaging bottle blow molding die proposed in this utility model; Figure 3 This is a side sectional view of a quick-change plastic packaging bottle blow molding die proposed in this utility model; Figure 4 This is an overall axial sectional view of a quick-change plastic packaging bottle blow molding die proposed in this utility model; Figure 5 This is a partial axial sectional view of a quick-change plastic packaging bottle blow molding die proposed in this utility model. Figure 6 for Figure 3 Enlarged view of point A in the middle; Figure 7 for Figure 4 Enlarged view of point B in the middle.
[0017] Explanation of reference numerals in the attached figures: 1. Mold body; 2. Slide groove; 3. Buffer spring; 4. Buffer rod; 5. Connecting groove; 6. Fixed base; 7. Connecting mechanism; 701. Connecting plate; 702. Connecting groove; 703. Rotating groove; 704. Threaded cylinder; 705. Worm gear; 706. Worm; 707. Moving rod; 708. Limiting groove; 709. Hexagonal block; 8. Fastening mechanism; 801. First fixed frame; 802. Second fixed frame; 803. Claw; 804. Tension spring; 805. Air cavity; 806. Return spring; 807. Sealing push rod; 808. Top block; 809. Connecting pipe. Detailed Implementation
[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 This utility model provides a specific implementation method: A quick-change mold for blowing plastic packaging bottles includes two mold bodies 1 and two fixed seats 6. Each fixed seat 6 has a connecting mechanism 7 inside. The connecting mechanism 7 includes two connecting plates 701, two threaded cylinders 704, and two worm gears 706. The mold body 1 is fixedly connected to the side of the fixed seat 6 with the connecting plate 701. The upper and lower ends of the outer wall of the front end of the fixed seat 6 are provided with connecting grooves 702, which are slidably connected to the connecting plates 701. The middle of the interior of the fixed seat 6 is provided with a rotating groove 703. The middle of the outer wall of the threaded cylinder 704 is fixedly connected with a worm wheel 705, which is meshed with the worm gear 706. The upper and lower ends of the threaded cylinder 704 pass through the fixed seat 6 and are threadedly connected with a moving rod 707. The side of the moving rod 707 away from the center of the threaded cylinder 704 passes through the fixed seat 6 and is snapped into the connecting plate 701.
[0020] Each of the four corners of the outer wall of one side of a mold body 1 has a sliding groove 2. A buffer spring 3 is fixedly connected to the inner wall of the other side of each sliding groove 2. A buffer rod 4 is fixedly connected to one side of each buffer spring 3. The buffer spring 3 fixedly connected inside the sliding groove 2 can apply a certain force to the buffer rod 4, keeping the buffer rod 4 extended out of the sliding groove 2. The existence of the sliding groove 2 guides the movement direction of the buffer rod 4, which slides within the sliding groove 2. Each of the four corners of the outer wall of the other side of one mold body 1 has a mating groove 5. One side of the buffer rod 4 passes through the sliding groove 2 and fits against the inner wall of the mating groove 5. By allowing the buffer rod 4 to move within the sliding groove 2, when two mold bodies 1 are mated together, the buffer rod 4 pushes the buffer spring 3 to compress, reducing the impact force between the molds. Simultaneously, allowing the buffer rod 4 to be inserted into the mating groove 5 ensures that the two mold bodies 1 can accurately fit together, reducing misalignment. The upper and lower ends of the outer wall of the threaded cylinder 704 are rotatably connected to the fixed base 6. The rear ends of the worm 706 are rotatably connected to the inner wall of the rear end of the rotating groove 703. The front ends of the worm 706 pass through the fixed seat 6 and are fixedly connected to a hexagonal block 709. The hexagonal block 709 fixedly connected to the worm 706 allows the operator to rotate the worm 706 using a wrench or other tools. The meshing connection between the worm 706 and the worm wheel 705 allows the worm wheel 705 to drive the threaded cylinder 704 to rotate on the fixed seat 6. In turn, the threaded cylinder 704 and the moving rod... The threaded connection between 707 allows the moving rod 707 to extend or retract from the threaded cylinder 704. Limiting grooves 708 are provided on both sides of the outer wall of the moving rod 707. The limiting grooves 708 are slidably connected to the fixed seat 6. By providing two limiting grooves 708 on the moving rod 707 and allowing the limiting grooves 708 to be slidably connected to the fixed seat 6, the moving rod 707 is restricted from rotating and will not rotate with the threaded cylinder 704, allowing the threaded cylinder 704 to be properly threadedly connected to the moving rod 707.
[0021] Reference Figure 1 , Figure 2 and Figure 5 The front and rear ends of the mold body 1 are provided with fastening mechanisms 8. The fastening mechanism 8 includes four first fixing frames 801, four second fixing frames 802 and four return springs 806. The inner walls of the front and rear ends of the first fixing frames 801 are rotatably connected to two claws 803. The top and bottom surfaces of the second fixing frames 802 are engaged with the claws 803. The top and bottom surfaces of the first fixing frames 801 are fixedly connected to tension springs 804. An air cavity 805 is opened in the middle of the first fixing frame 801. The other side of the return springs 806 is fixedly connected to a sealing push rod 807. One side of the sealing push rod 807 passes through the first fixing frame 801 and is fixedly connected to a top block 808.
[0022] The upper and lower ends of the front and rear outer walls of a mold body 1 are fixedly connected to two first fixing frames 801, and the upper and lower ends of the front and rear outer walls of a mold body 1 are fixedly connected to two second fixing frames 802. Multiple bolts are used to fix the first fixing frames 801 and second fixing frames 802 to the mold body 1. Multiple bolts are also used to fix the connecting plate 701 to the mold body 1, facilitating the removal of the first fixing frames 801, second fixing frames 802, and connecting plate 701 from the mold body 1 for easy inspection or replacement of damaged parts. The side of the tension spring 804 near the center of the first fixing frame 801 is fixedly connected to the claw 803, and the inner wall of one side of the air chamber 805 is fixedly connected to the return spring 806. The tension spring 804 fixedly connected inside the first fixing frame 801 acts on the claw 803, preventing the top block 808 from applying force to the claw 803. When the pressure is high, the claw 803 can return to its original position and maintain the engagement with the second fixed frame 802. The return spring 806 inside the air chamber 805 acts on the sealing push rod 807, so that when no high-pressure gas is introduced into the air chamber 805, the sealing push rod 807 can drive the top block 808 to return to its original state. The sealing push rod 807 slides inside the air chamber 805. One side of the top block 808 is in contact with the claw 803. The inner wall of the other side of the air chamber 805 is connected to the connecting pipe 809. High-pressure air can be introduced into the air chamber 805 through the connecting pipe 809 that is connected to the first fixed frame 801 and the air chamber 805, pushing the sealing push rod 807 to move, so that the top block 808 can push the claw 803 to rotate and maintain the engagement with the second fixed frame 802. The sealing push rod 807 is fitted with a sealing ring, which can improve the sealing performance and prevent gas leakage inside the air chamber 805.
[0023] Working principle: When using this quick-change plastic packaging bottle blow molding mold, the operator first uses multiple bolts and nuts to fix the fixed seat 6 to the push component of the blow molding machine, and connects the connecting pipe 809 to the external air supply pipe. The push component of the blow molding machine drives the fixed seat 6 to move, so that the two mold bodies 1 are close to each other, and the molten tubular plastic is sandwiched in the middle. Then, the operator uses an external air pump to inject high-pressure gas into the air chamber 805, pushes the sealing push rod 807 to move, and makes the top block 808 push the claw 803 to rotate, and engage with the second fixed frame 802, so that the two halves of the mold are more tightly joined. Next, the blow molding machine is used to blow air and perform the molding operation. After molding, the gas in the air chamber 805 is extracted and restored under the action of the return spring 806. The claw 803 is released from the second fixed frame 802 under the action of the tension spring 804. Then, the staff uses the pushing part of the blow molding machine to drive the fixed seat 6 to move, so that the two mold bodies 1 can be separated. Finally, the worker can use a wrench or other tools to rotate the worm gear 706 via the hexagonal block 709, causing the worm wheel 705 to drive the threaded cylinder 704 to retract the moving rod 707, thus releasing the locking state of the connecting plate 701. After that, the worker slides the mold body 1 out of the connecting groove 702 for replacement. Then, the worker slides the new mold body 1 into the connecting groove 702, and again uses the worm wheel 705 to drive the threaded cylinder 704, causing the moving rod 707 to extend and lock into the connecting plate 701, completing the mold replacement.
[0024] The following points should be noted in this article: 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.
[0025] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.
[0026] 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 specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific 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 mold for blowing plastic packaging bottles, comprising two mold bodies (1) and two fixing bases (6), characterized in that: Each of the fixed bases (6) is equipped with a connecting mechanism (7), which includes two connecting plates (701), two threaded cylinders (704), and two worm gears (706). The mold body (1) is fixedly connected to a connecting plate (701) on the side closest to the fixed base (6). Connecting grooves (702) are provided at the upper and lower ends of the outer wall of the front end of the fixed base (6). The connecting grooves (702) are slidably connected to the connecting plates (701). (6) A rotating groove (703) is provided in the middle of the interior. A worm wheel (705) is fixedly connected to the middle of the outer wall of the threaded cylinder (704). The worm wheel (705) is meshed with the worm (706). The upper and lower ends of the threaded cylinder (704) pass through the fixed seat (6) and are threadedly connected to the moving rod (707). The side of the moving rod (707) away from the center of the threaded cylinder (704) passes through the fixed seat (6) and is snapped to the connecting plate (701). The front and rear ends of the mold body (1) are provided with fastening mechanisms (8). The fastening mechanism (8) includes four first fixing frames (801), four second fixing frames (802), and four return springs (806). The inner walls of the front and rear ends of the first fixing frames (801) are rotatably connected to two claws (803). The top and bottom surfaces of the second fixing frames (802) are engaged with the claws (803). The top and bottom surfaces of the first fixing frames (801) are fixedly connected to tension springs (804). An air chamber (805) is opened in the middle of the first fixing frame (801). The other side of the return springs (806) is fixedly connected to a sealing push rod (807). One side of the sealing push rod (807) passes through the first fixing frame (801) and is fixedly connected to a top block (808).
2. The quick-change plastic packaging bottle blow molding mold according to claim 1, characterized in that: A sliding groove (2) is provided at each of the four corners of the outer wall of one side of the mold body (1), and a buffer spring (3) is fixedly connected to the inner wall of the other side of the sliding groove (2), and a buffer rod (4) is fixedly connected to one side of the buffer spring (3).
3. The quick-change plastic packaging bottle blow molding mold according to claim 2, characterized in that: The buffer rods (4) slide inside the slide groove (2). The four corners of the outer wall of the mold body (1) are provided with docking grooves (5). One side of the buffer rods (4) passes through the slide groove (2) and fits against the inner wall of the docking groove (5).
4. The quick-change plastic packaging bottle blow molding mold according to claim 1, characterized in that: The upper and lower ends of the outer wall of the threaded cylinder (704) are rotatably connected to the fixed seat (6), the rear end of the worm (706) is rotatably connected to the inner wall of the rear end of the rotating groove (703), and the front end of the worm (706) passes through the fixed seat (6) and is fixedly connected to a hexagonal block (709).
5. A quick-change blow molding die for plastic packaging bottles according to claim 1, characterized in that: The movable rod (707) has limit grooves (708) on both sides of its outer wall, and the limit grooves (708) are slidably connected to the fixed seat (6).
6. The quick-change plastic packaging bottle blow molding mold according to claim 1, characterized in that: The upper and lower ends of the front and rear outer walls of one mold body (1) are fixedly connected to two first fixing frames (801), and the upper and lower ends of the front and rear outer walls of one mold body (1) are fixedly connected to two second fixing frames (802).
7. A quick-change mold for blowing plastic packaging bottles according to claim 1, characterized in that: The tension spring (804) is fixedly connected to the claw (803) on the side near the center of the first fixed frame (801), and the inner wall of the air chamber (805) is fixedly connected to the reset spring (806).
8. A quick-change mold for blowing plastic packaging bottles according to claim 1, characterized in that: The sealing push rods (807) all slide inside the air chamber (805), one side of the top block (808) is in contact with the claw (803), and the inner wall of the other side of the air chamber (805) is connected by a connecting pipe (809).