Quick die changing structure of elbow forming die
By designing a sliding groove structure for the movable plate and snap-fit block, combined with an electric telescopic rod and spring, a quick mold change for the elbow forming mold is achieved, solving the problem of difficult mold replacement in existing technologies, and improving production flexibility and maintenance convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN LONGLIKE STAINLESS STEEL PIPE IND CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-06-05
AI Technical Summary
The existing elbow forming mold has its upper and lower molds fixedly connected to the top plate and base, making it difficult to quickly replace them when producing multiple varieties or small batches, reducing production flexibility and increasing maintenance difficulty.
By designing a sliding structure for the movable plate and snap-fit block, the upper and lower molds can be quickly disassembled and installed. The combination of electric telescopic rod and spring enables rapid replacement of the upper and lower molds.
It enables quick replacement of upper and lower molds, improving production flexibility and ease of maintenance, and is suitable for multi-variety and small-batch production needs.
Smart Images

Figure CN224323472U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of quick mold changing structure technology, and in particular to a quick mold changing structure for elbow forming mold. Background Technology
[0002] Elbow forming molds are molds used to produce elbow products made of plastic or other injectable materials. They are commonly used to manufacture elbow-shaped parts such as plastic pipes, connectors, and joints. The mold injects plastic material into the mold through an injection molding process, and the elbow of the required shape is formed during the cooling process. Elbow forming molds can quickly and in batches produce elbow parts of the same shape through injection molding, and can complete the molding in a short time. They are characterized by high efficiency and are suitable for large-scale production.
[0003] Currently, in some existing elbow forming molds, the upper and lower molds are fixedly connected to the top plate and base. In multi-variety or small-batch production, the inconvenience of quickly changing molds of different specifications may reduce production flexibility, and the difficult-to-change design will increase the difficulty of daily maintenance.
[0004] Therefore, those skilled in the art have provided a quick mold change structure for elbow forming dies to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a quick mold-changing structure for elbow forming molds. This structure allows the movable plate to move inwards, causing the locking block to enter the sliding groove, thereby detaching the first connecting block from the top plate. Moving the movable plate in the opposite direction causes the locking block to engage with the top plate, facilitating quick separation and installation of the upper mold. Pulling the fixed rod inwards moves the moving rod out of the second locking slot, quickly separating the lower mold and allowing for easy mold replacement as needed.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A quick mold changing structure for elbow forming mold includes a base, with electric telescopic rods fixedly connected to the four corners of the upper end of the base, a top plate fixedly connected to the output end of the electric telescopic rods, an upper connecting structure provided at the lower end of the top plate, and a lower connecting structure provided inside the base.
[0008] The upper connecting structure includes an upper mold, with a No. 1 connecting block fixedly connected to both sides of the upper end of the upper mold. The top plate has multiple No. 1 slots inside. The front end of the No. 1 connecting block has a sliding groove. The bottom upper end of the sliding groove is fixedly connected to a No. 1 spring. The front end of the No. 1 spring is fixedly connected to a snap-fit block. The lower end of the sliding groove is slidably connected to a movable plate. The movable plate is fixedly connected to the snap-fit block. Movable snap-fit blocks are slidably connected to both sides of the movable plate.
[0009] Through the above technical solution, the No. 1 connecting block is designed to facilitate insertion into the No. 1 slot, and after the snap-fit connection is completed, the upper mold is installed and fixed. The snap-fit block is designed to facilitate snapping into the top plate after it moves outward, thereby fixing the No. 1 connecting block. The No. 1 spring is designed to facilitate the installation of the snap-fit block inside the slide groove. The movable plate is designed to facilitate the movement of the snap-fit block when it moves inside the slide groove, so that it moves into or out of the slot, thereby moving away from or snapping into the top plate, which facilitates the quick disassembly and installation of the upper mold. The movable snap-fit block is designed to facilitate the snap-fit fixing of the position of the movable plate.
[0010] Furthermore, the lower connecting structure includes a lower mold that slides inside the base. Two connecting blocks are fixedly connected to both sides of the front end of the lower mold. A fixed rod is slidably connected inside the two connecting blocks. A moving rod is fixedly connected to the side of the fixed rod away from the two connecting blocks. Two slots are opened on both sides inside the base.
[0011] The above technical solution facilitates the forming of the elbow workpiece by using the lower mold in conjunction with the upper mold. The fixed rod facilitates the movement of the moving rod when it is moved towards the center, thus moving it away from the base and making it easy to separate the lower mold from the base. The moving rod facilitates the insertion into the second slot to complete the snap-fit connection between the lower mold and the base, making it easy to install different lower molds to meet different production needs.
[0012] Furthermore, I-beam blocks are fixedly connected to both sides of the inside of the slide, and the movable locking block is engaged with the I-beam blocks;
[0013] The above technical solution allows the movable card block to be inserted into the I-shaped block, thereby fixing the position of the movable plate.
[0014] Furthermore, a second spring is fixedly connected to both sides inside the movable plate, and the side of the second spring away from the center of the movable plate is fixedly connected to the movable locking block.
[0015] The above technical solution allows the second spring to be set so that after compression, the movable locking block can be moved in the opposite direction and locked into the other side of the I-beam block.
[0016] Furthermore, the upper and lower ends of the movable card block are fixedly connected to limit blocks, and limit grooves are opened on both sides of the upper and lower ends inside the movable plate;
[0017] The above technical solution uses limit blocks and limit slots to facilitate the movement of the movable card block and thus limit its movement.
[0018] Furthermore, sliding grooves are provided on both sides of the interior of the base, and a fixed plate is fixedly connected to the bottom of the sliding groove. Sliding seats are fixedly connected to both sides of the lower end of the lower mold.
[0019] The above technical solution allows the lower mold to be easily slidably installed inside the base by sliding the sliding seat on the outside of the fixed plate.
[0020] Furthermore, a third spring is fixedly connected to one side of the second connecting block, and one side of the third spring is fixedly connected to the moving rod. The third spring is sleeved on the outside of the fixed rod.
[0021] The above technical solution allows the No. 3 spring to be set so that the moving rod can be moved in the opposite direction after compression, thereby locking it into the base.
[0022] Furthermore, a T-shaped slider is fixedly connected to the rear end of one side of the moving rod, and T-shaped grooves are provided on both sides of the front end of the lower mold;
[0023] The above technical solution allows the T-shaped slider to slide inside the T-shaped groove, which helps to limit the movement of the moving rod.
[0024] The present invention has the following beneficial effects:
[0025] 1. The present invention discloses a quick mold changing structure for elbow forming molds. Compared with existing quick mold changing structures, the design of the snap-fit block facilitates the connection between the top plate and the upper mold. By squeezing the movable snap-fit block inward to move it away from the side of the I-beam, and pushing the movable plate inward to the inner bottom, the movable snap-fit block is released. The second spring drives it to snap into the other side of the I-beam, fixing the position of the movable plate. At the same time, the snap-fit block is driven to move inward to slide into the slide groove. Moving other snap-fit blocks into the groove allows the first connecting block to detach from the inside of the top plate, thereby quickly disassembling the upper mold and facilitating its rapid replacement.
[0026] 2. The present invention proposes a quick mold changing structure for elbow forming molds. Compared with existing quick mold changing structures, the lower mold can be fixedly connected by a moving rod. By moving the fixed rod towards the center, it causes the moving rod to move away from the second slot. After pulling the lower mold outward, it separates from the base. During installation, the compressed third spring causes the moving rod to engage in the slot, thereby completing the connection between the lower mold and the base. This facilitates quick disassembly and installation of the lower mold and allows for quick replacement of the lower mold. Attached Figure Description
[0027] Figure 1 This is an isometric view of a quick mold changing structure for an elbow forming mold proposed in this utility model;
[0028] Figure 2 This is a schematic diagram of the top plate of a quick mold changing structure for an elbow forming mold proposed in this utility model;
[0029] Figure 3 This is a schematic diagram of the snap-fit block of a quick mold changing structure for an elbow forming mold proposed in this utility model;
[0030] Figure 4 This is a schematic diagram of the lower mold of a quick mold changing structure for elbow forming mold proposed in this utility model;
[0031] Figure 5 This is a schematic diagram of the moving rod of a quick mold changing structure for an elbow forming mold proposed in this utility model.
[0032] Legend:
[0033] 1. Base; 2. Top plate; 3. Upper connecting structure; 301. Upper mold; 302. Connecting block No. 1; 303. Slide groove; 304. Spring No. 1; 305. Snap-fit block; 306. I-beam block; 307. Movable plate; 308. Movable snap-fit block; 309. Spring No. 2; 310. Limiting block; 311. Limiting groove; 312. Snap-fit groove No. 1; 4. Lower connecting structure; 401. Lower mold; 402. Sliding seat; 403. Sliding groove; 404. Fixed plate; 405. Connecting block No. 2; 406. Snap-fit groove No. 2; 407. Moving rod; 408. Fixed rod; 409. Spring No. 3; 410. T-shaped slider; 411. T-shaped slide groove; 5. Electric telescopic rod. Detailed Implementation
[0034] 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.
[0035] Reference Figure 1-3 One specific embodiment provided by this utility model:
[0036] A quick mold changing structure for elbow forming mold includes a base 1, with electric telescopic rods 5 fixedly connected to the four corners of the upper end of the base 1, a top plate 2 fixedly connected to the output end of the electric telescopic rods 5, an upper connecting structure 3 provided at the lower end of the top plate 2, and a lower connecting structure 4 provided inside the base 1.
[0037] The upper connecting structure 3 includes an upper mold 301. Connecting blocks 302 are fixedly connected to both sides of the upper end of the upper mold 301. Multiple slots 312 are provided inside the top plate 2. A sliding groove 303 is provided at the front end of each connecting block 302. A spring 304 is fixedly connected to the upper bottom of the sliding groove 303. A snap-fit block 305 is fixedly connected to the front end of the spring 304. A movable plate 307 is slidably connected to the lower end of the sliding groove 303. The movable plate 307 is fixedly connected to the snap-fit block 305. 07 has movable locking blocks 308 slidably connected to both sides inside, and I-beam blocks 306 are fixedly connected to both sides inside the slide groove 303. The movable locking blocks 308 and I-beam blocks 306 are locked together. The movable plate 307 has a second spring 309 fixedly connected to both sides inside. The side of the second spring 309 away from the center of the movable plate 307 is fixedly connected to the movable locking block 308. The upper and lower ends of the movable locking block 308 are fixedly connected to limit blocks 310. Limit grooves 311 are opened on both the upper and lower ends inside the movable plate 307.
[0038] Specifically, the first connecting block 302 is designed to facilitate insertion into the first slot 312. After the snap-fit connection is completed, the upper mold 301 is installed and fixed. The snap-fit block 305 is designed to snap into the top plate 2 after it moves outward, thereby fixing the first connecting block 302. The first spring 304 is designed to facilitate the installation of the snap-fit block 305 inside the slide groove 303. The movable plate 307 is designed to move the snap-fit block 305 when it moves inside the slide groove 303, allowing it to move into or out of the groove, thereby moving away from or snapping into the top plate 2. This design facilitates the quick disassembly and installation of the upper mold 301. The movable locking block 308 allows for easy locking and fixing of the movable plate 307. The I-beam block 306 allows the movable locking block 308 to be inserted into it, thus fixing the position of the movable plate 307. The second spring 309 allows the movable locking block 308 to move in the opposite direction after compression, so that it can be inserted into the other side of the I-beam block 306. The limiting block 310 and the limiting groove 311 allow the movable locking block 308 to move and limit its movement.
[0039] Reference Figure 1 , Figure 4 and Figure 5The lower connecting structure 4 includes a lower mold 401, which slides inside the base 1. Sliding grooves 403 are provided on both sides of the base 1. A fixed plate 404 is fixedly connected to the bottom of the sliding groove 403. Sliding seats 402 are fixedly connected to both sides of the lower end of the lower mold 401. Second connecting blocks 405 are fixedly connected to both sides of the front end of the lower mold 401. A fixed rod 408 is slidably connected inside the second connecting block 405. A moving rod 407 is fixedly connected to the side of the fixed rod 408 away from the second connecting block 405. A third spring 409 is fixedly connected to one side of the second connecting block 405. One side of the third spring 409 is fixedly connected to the moving rod 407. The third spring 409 is sleeved on the outside of the fixed rod 408. A T-shaped slider 410 is fixedly connected to the rear end of one side of the moving rod 407. T-shaped sliding grooves 411 are provided on both sides of the front end of the lower mold 401. Second slots 406 are provided on both sides of the inside of the base 1.
[0040] Specifically, the lower mold 401 is designed to cooperate with the upper mold 301 to form the elbow workpiece. The sliding seat 402 slides on the outside of the fixed plate 404 to facilitate the sliding installation of the lower mold 401 inside the base 1. The fixed rod 408 is designed to move the moving rod 407 away from the base 1 when it is pushed towards the center, making it easier to separate the lower mold 401 from the base 1. The moving rod 407 is designed to be inserted into the second slot 406 to complete the snap-fit connection between the lower mold 401 and the base 1, which is convenient for installing different lower molds 401 to meet different production needs. The third spring 409 is designed to drive the moving rod 407 to move in the opposite direction after compression, so that it is snapped into the base 1. The T-shaped slider 410 slides inside the T-shaped groove 411 to limit the movement of the moving rod 407.
[0041] Working principle: During use, when it is necessary to replace the upper mold 301, press the movable locking blocks 308 on both sides inward, causing them to compress the second spring 309. At the same time, this moves the movable locking blocks 308 away from the inside of the I-beam block 306, pushing the movable plate 307 inward. This causes the movable locking blocks 308 to move to the inner bottom, and then release the pressure. The second spring 309 then moves the movable locking blocks 308 in the opposite direction, locking them into the other side of the I-beam block 306, thus fixing the position of the movable plate 307. Simultaneously, the locking blocks 305 are moved inward until they are all inside the slide groove 303. The same operation is performed to move the other locking blocks 305 into the groove, allowing the first connecting block 302 to detach from the top plate 2, thereby separating the parts. Disconnect the upper mold 301 from the base 1. To disassemble the upper mold 301, reverse the operation to move the movable plate 307 and the snap-fit block 305 in the opposite direction. After snapping into the top plate 2, the upper mold 301 can be connected. When the lower mold 401 needs to be replaced, move the fixed rod 408 towards the center to move the moving rod 407 towards the center until it is away from the second snap-fit slot 406. Pull the lower mold 401 outward to separate it from the base 1, so as to facilitate the replacement of different lower molds 401. During installation, align the sliding seat 402 with the fixed plate 404, slide the lower mold 401 into the base 1, and let the compressed third spring 409 drive the moving rod 407 into the slot to complete the connection between the lower mold 401 and the base 1.
[0042] 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 mold changing structure for elbow forming molds, comprising a base (1), characterized in that: Electric telescopic rods (5) are fixedly connected to the four corners of the upper end of the base (1). The output end of the electric telescopic rod (5) is fixedly connected to the top plate (2). The lower end of the top plate (2) is provided with an upper connecting structure (3). The base (1) is provided with a lower connecting structure (4). The upper connecting structure (3) includes an upper mold (301), with a No. 1 connecting block (302) fixedly connected to both sides of the upper end of the upper mold (301). The top plate (2) has multiple No. 1 slots (312) inside. The front end of the No. 1 connecting block (302) has a sliding groove (303). The bottom upper end of the sliding groove (303) is fixedly connected to a No. 1 spring (304). The front end of the No. 1 spring (304) is fixedly connected to a snap-fit block (305). The lower end of the sliding groove (303) is slidably connected to a movable plate (307). The movable plate (307) is fixedly connected to the snap-fit block (305). Movable snap-fit blocks (308) are slidably connected to both sides of the movable plate (307).
2. The quick mold changing structure for elbow forming mold according to claim 1, characterized in that: The lower connecting structure (4) includes a lower mold (401), which slides inside the base (1). A second connecting block (405) is fixedly connected to both sides of the front end of the lower mold (401). A fixed rod (408) is slidably connected inside the second connecting block (405). A moving rod (407) is fixedly connected to the side of the fixed rod (408) away from the second connecting block (405). A second slot (406) is opened on both sides inside the base (1).
3. The quick mold changing structure for elbow forming mold according to claim 1, characterized in that: Both sides of the inside of the slide (303) are fixedly connected to I-beams (306), and the movable locking block (308) is engaged with the I-beams (306).
4. The quick mold changing structure for elbow forming mold according to claim 1, characterized in that: The movable plate (307) has two fixedly connected springs (309) on both sides inside. The side of the spring (309) away from the center of the movable plate (307) is fixedly connected to the movable block (308).
5. The quick mold changing structure for elbow forming mold according to claim 1, characterized in that: The upper and lower ends of the movable card block (308) are fixedly connected to limit blocks (310), and the upper and lower ends of the movable plate (307) are provided with limit grooves (311).
6. The quick mold changing structure for elbow forming mold according to claim 2, characterized in that: The base (1) has sliding grooves (403) on both sides inside. A fixing plate (404) is fixedly connected to the bottom of the sliding groove (403). Sliding seats (402) are fixedly connected to both sides of the lower end of the lower mold (401).
7. The quick mold changing structure for elbow forming mold according to claim 2, characterized in that: A third spring (409) is fixedly connected to one side of the second connecting block (405). The third spring (409) is fixedly connected to the moving rod (407) on one side. The third spring (409) is sleeved on the outside of the fixed rod (408).
8. The quick mold changing structure for elbow forming mold according to claim 2, characterized in that: The rear end of one side of the moving rod (407) is fixedly connected to a T-shaped slider (410), and T-shaped grooves (411) are provided on both sides of the front end of the lower mold (401).