Continuous piston type core pulling device
Through the core design and cylinder drive of the continuous piston core pulling device, the demoulding difficulty and surface dent problems of swirl tee special-shaped pipe fittings in the injection molding process are solved, and the effects of stability and easy demoulding are achieved.
Patent Information
- Application Number
- CN202511201648.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-26
- Publication Date
- 2025-10-03
AI Technical Summary
Existing swirl tee special-shaped pipe fittings are difficult to demould during the injection molding process, and the core pulling process easily causes dents on the surface of the injection molded pipe fittings.
A continuous piston core-pulling device is used, which drives multiple cores to combine or separate without hindrance through the driving part to form the cores required for injection molding. After injection molding, the cores are pulled out of the cavity one by one, and the cylinder and sliding seat are used to achieve stable movement and withdrawal of the cores.
It reduces the demoulding difficulty of injection molded pipe fittings, reduces the appearance of dents on the surface of injection molded pipe fittings, meets the molding requirements of special-shaped pipe fittings, and maintains the stability of the core during the injection molding process.
Smart Images
Figure CN120735259A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of injection molds, and in particular to a continuous piston-type core-pulling device. Background Art
[0002] In building drainage systems, vortex tees are often used at the connection nodes between the main drainage risers and horizontal branch pipes of residential buildings, hotels, etc. to reduce the noise caused by drainage, thereby optimizing the water flow pattern and achieving efficient drainage and noise reduction.
[0003] A vortex tee generally consists of a main pipe and a branch pipe. The branch pipe is connected to the main pipe using a spiral offset interface. The main pipe has guide vanes that force the water flow to enter the riser tangentially. The inner wall is usually designed with regular polygonal spiral patterns to maintain the spiral motion of the water flow and prevent water flow interruptions.
[0004] However, special-shaped pipe fittings such as swirl tees are difficult to demold during the injection molding process, the cores are easily blocked by each other, and dents are easily caused on the surface of the injection molded pipe fittings during the core pulling process. Summary of the Invention
[0005] In response to the above-mentioned shortcomings in the prior art, the present invention provides a continuous piston core pulling device to solve the problem that special-shaped pipe fittings such as existing swirl tees are difficult to demold during the injection molding process, and dents are easily caused on the surface of the injection-molded pipe fittings during the core pulling process.
[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A continuous piston-type core-pulling device comprises an upper mold, a lower mold is provided below the upper mold, and the inner cavity of the upper mold and the inner cavity of the lower mold can form a mold cavity; a first core, the top surface of the first core is provided with a groove, the bottom surface of the groove is provided as an inclined surface facing the mold cavity, and a second core is slidably connected in the groove; a third core, the third core is provided opposite to the first core; a fourth core, the fourth core is provided on the side of the first core, a fixed rod is slidably connected in the fourth core, and a fifth core is fixedly connected to the end of the fixed rod; a driving part, the driving part can drive the first core, the second core, the third core, the fourth core and the fifth core to be combined or separated without hindering each other; The first core, the second core, the third core, the fourth core and the fifth core can constitute the cores required for injection molding.
[0007] In this way, when injection molding is required, the driving unit is turned on to drive the first core and the third core to move toward the cavity. After moving a certain distance, the first core, the second core and the third core abut against each other. While the first core is moving, the second core moves along the groove back to the cavity. Turn on the driving part to drive the fourth core and the fifth core to move toward the cavity. After moving a certain distance, the end faces of the fourth core and the fifth core are close to the first core. At this time, the first core, the second core, the third core, the fourth core and the fifth core constitute the core required for injection molding.
[0008] Furthermore, the driving part includes a first cylinder fixedly mounted on the side surface of the lower mold, an output end of the first cylinder is fixedly connected to a moving block, and a side surface of the moving block is fixedly connected to the first core.
[0009] In this way, after injection molding, the first cylinder is turned on to drive the moving block to move, and the moving block drives the first core to move back to the cavity. After moving a certain distance, the second core presses against the injection molded part, and the second core begins to slide along the groove toward the cavity. After sliding a certain distance, the second core lowers its height and can be withdrawn from the cavity. The first cylinder is continued to be turned on to drive the first core and the second core to be withdrawn from the cavity. In this way, the first core and the second core can be withdrawn from the cavity without hindering each other, thereby reducing the difficulty of demoulding the injection molded part. Furthermore, the driving part also includes a second cylinder fixedly mounted on the side of the lower mold, the second cylinder facing the first cylinder, the output end of the second cylinder is fixedly connected to a mounting block, and the side of the mounting block is fixedly connected to the third core, thereby being able to push the third core to form a core or drive the third core to be pulled out of the cavity.
[0010] Furthermore, a lower mold base is fixedly installed on the bottom surface of the lower mold, a sliding base is fixedly installed on the side of the lower mold base, the sliding base and the lower mold base are inclined, a lifting cylinder is fixedly installed in the sliding base, the output end of the lifting cylinder is fixedly connected to the lifting block, a fixed block is fixedly installed on the side of the lifting block, the side of the fixed block is fixedly connected to the fixed rod, a moving cylinder is fixedly installed on the side of the fixed block, the output end of the moving cylinder passes through the fixed block and is fixedly connected to the moving block, the end face of the moving block is fixedly connected to the fourth core, and the moving block is slidably connected to the top surface of the lifting block.
[0011] In this way, after injection molding, the moving cylinder is turned on to drive the moving cylinder to move, and the moving cylinder drives the fourth core to move together. After moving a certain distance, the fourth core is pulled out of the cavity, and the fifth core is located at the cavity port. The lifting cylinder is turned on to drive the lifting block to slide along the sliding seat. After sliding a certain distance, the lifting block drops to a certain height, driving the fourth core and the fifth core to be pulled out of the cavity. In this way, the fourth core and the fifth core can be pulled out of the cavity without hindering each other, reducing the difficulty of demolding the injection molded parts.
[0012] Furthermore, a clamping block is fixedly installed on the side of the first core, and a clamping groove is opened on the end face of the third core. The clamping block is adapted to the clamping groove and can be clamped with the clamping groove, so that the first core and the third core can support each other, thereby improving the stability of the core of the device during the injection molding process.
[0013] Furthermore, the end faces of the fourth core and the fifth core can form an arc surface, which is adapted to the surface of the first core. The fourth core and the fifth core can be close to the first core, so that the fourth core and the fifth core can support each other with the first core, thereby improving the stability of the core of the device during the injection molding process.
[0014] Furthermore, a mold closing cylinder is fixedly installed at the four corners of the bottom surface of the lower mold base, and the output end of the mold closing cylinder passes through the lower mold base and is fixedly connected to the upper mold base. The bottom surface of the upper mold base is fixedly connected to the upper mold, thereby maintaining the stability of the mold closing state and further maintaining the stability of the core during the injection molding process.
[0015] Furthermore, an injection port is fixedly mounted on the top surface of the upper mold base, thereby facilitating injection molding into the mold cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of the three-dimensional structure of a continuous piston core pulling device according to one embodiment of the present invention (mold closing state); Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a continuous piston core pulling device (mold opening state) is shown; Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a continuous piston core pulling device is shown (the first core and the second core are hidden); Figure 4 for Figure 3 A cross-sectional structural diagram of an embodiment of a continuous piston core pulling device is shown; Figure 5 for Figure 2 A schematic top view of an embodiment of a continuous piston core pulling device is shown; Figure 6 for Figure 5 A cross-sectional structural diagram of an embodiment of a continuous piston core pulling device is shown; Reference numerals in the accompanying drawings of the specification: Upper mold 1, upper mold base 101, injection port 102; Lower mold 2, lower mold base 201, clamping cylinder 202; First core 3, groove 301, second core 302, clamping block 303; The third core 4, the slot 401; Fourth core 5, fixing rod 501, fifth core 502; Driving unit 6 , first cylinder 601 , moving block 602 , second cylinder 603 , mounting block 604 , sliding seat 605 , lifting cylinder 606 , lifting block 607 , fixed block 608 , moving cylinder 609 , and moving block 610 . DETAILED DESCRIPTION
[0017] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.
[0018] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0019] Example: like Figures 1-6 As shown, a continuous piston core-pulling device of the present invention includes an upper mold 1, a lower mold 2 is arranged below the upper mold 1, and the inner cavity of the upper mold 1 and the inner cavity of the lower mold 2 can constitute a cavity; a first core 3, a top surface of the first core 3 is provided with a groove 301, the bottom surface of the groove 301 is set as an inclined surface facing the cavity, and a second core 302 is slidably connected in the groove 301; a third core 4, the third core 4 is arranged opposite to the first core 3; a fourth core 5, the fourth core 5 is arranged on the side of the first core 3, a fixed rod 501 is slidably connected in the fourth core 5, and the end of the fixed rod 501 is fixedly connected to the fifth core 502; a driving part 6, the driving part 6 can drive the first core 3, the second core 302, the third core 4, the fourth core 5 and the fifth core 502 to combine or separate without hindering each other, and the first core 3, the second core 302, the third core 4, the fourth core 5 and the fifth core 502 can constitute the core required for injection molding.
[0020] In this way, when injection molding is required, the driving unit 6 is turned on to drive the first core 3 and the third core 4 to move toward the cavity. After moving a certain distance, the first core 3, the second core 302 and the third core 4 abut against each other. While the first core 3 is moving, the second core 302 moves along the groove 301 away from the cavity. The driving unit 6 is turned on to drive the fourth core 5 and the fifth core 502 to move toward the cavity. After moving a certain distance, the end faces of the fourth core 5 and the fifth core 502 are close to the first core 3. At this time, the first core 3, the second core 302, the third core 4, the fourth core 5 and the fifth core 502 constitute the core required for injection molding; After injection molding, preparations for demoulding of the injection molded parts are started, and the driving unit 6 is turned on again. The driving unit 6 drives the cores to be pulled out of the cavity formed by the inner cavity of the upper mold 1 and the inner cavity of the lower mold 2 one by one. During the core pulling process, the cores do not hinder each other. With this structure, the process requirements of molding special-shaped injection molded pipe fittings can be met, and at the same time, the difficulty of demoulding the injection molded parts can be reduced, thereby reducing the possibility of dents on the surface of the injection molded parts.
[0021] The driving unit 6 includes a first cylinder 601 fixedly mounted on the side of the lower mold 2 . The output end of the first cylinder 601 is fixedly connected to a moving block 602 . The side of the moving block 602 is fixedly connected to the first core 3 .
[0022] In this way, after injection molding, the first cylinder 601 is turned on to drive the moving block 602 to move, and the moving block 602 drives the first core 3 to move back to the cavity. After moving a certain distance, the second core 302 presses against the injection molded part, and the second core 302 begins to slide toward the cavity along the groove 301. After sliding a certain distance, the second core 302 lowers its height and can be withdrawn from the cavity. The first cylinder 601 is continued to be turned on to drive the first core 3 and the second core 302 to be withdrawn from the cavity. As a result, the first core 3 and the second core 302 can be withdrawn from the cavity without hindering each other, thereby reducing the difficulty of demolding the injection molded part.
[0023] The driving part 6 also includes a second cylinder 603 fixedly mounted on the side of the lower mold 2. The second cylinder 603 faces the first cylinder 601. The output end of the second cylinder 603 is fixedly connected to a mounting block 604. The side of the mounting block 604 is fixedly connected to the third core 4, thereby being able to push the third core 4 to form a core or drive the third core 4 to be pulled out of the cavity.
[0024] The bottom surface of the lower mold 2 is fixedly installed with a lower mold base 201, and a sliding base 605 is fixedly installed on the side of the lower mold base 201. The sliding base 605 is inclined with the lower mold base 201, and a lifting cylinder 606 is fixedly installed in the sliding base 605. The output end of the lifting cylinder 606 is fixedly connected with a lifting block 607, and a fixed block 608 is fixedly installed on the side of the lifting block 607. The side of the fixed block 608 is fixedly connected to the fixed rod 501, and a moving cylinder 609 is fixedly installed on the side of the fixed block 608. The output end of the moving cylinder 609 passes through the fixed block 608 and is fixedly connected with a moving block 610. The end face of the moving block 610 is fixedly connected to the fourth core 5, and the moving block 610 is slidably connected to the top surface of the lifting block 607.
[0025] In this way, after injection molding, the moving cylinder 609 is turned on to drive the moving cylinder 609 to move, and the moving cylinder 609 drives the fourth core 5 to move together. After moving a certain distance, the fourth core 5 is pulled out of the cavity, and the fifth core 502 is located at the cavity port. The lifting cylinder 606 is turned on to drive the lifting block 607 to slide along the sliding seat 605. After sliding a certain distance, the lifting block 607 drops to a certain height, driving the fourth core 5 and the fifth core 502 to be pulled out of the cavity. In this way, the fourth core 5 and the fifth core 502 can be pulled out of the cavity without hindering each other, thereby reducing the difficulty of demolding the injection molded parts.
[0026] A clamping block 303 is fixedly installed on the side of the first core 3, and a clamping groove 401 is opened on the end face of the third core 4. The clamping block 303 is adapted to the clamping groove 401, and the clamping block 303 can be clamped with the clamping groove 401, so that the first core 3 and the third core 4 can support each other, thereby improving the stability of the core of the device during the injection molding process.
[0027] The end faces of the fourth core 5 and the fifth core 502 can form an arc surface, which is adapted to the surface of the first core 3. The fourth core 5 and the fifth core 502 can be close to the first core 3, so that the fourth core 5 and the fifth core 502 can support each other with the first core 3, thereby improving the stability of the core of the device during the injection molding process.
[0028] The four corners of the bottom surface of the lower mold base 201 are fixedly installed with a mold closing cylinder 202. The output end of the mold closing cylinder 202 passes through the lower mold base 201 and is fixedly connected to the upper mold base 101. The bottom surface of the upper mold base 101 is fixedly connected to the upper mold 1, thereby maintaining the stability of the mold closing state and further maintaining the stability of the core during the injection molding process.
[0029] An injection port 102 is fixedly mounted on the top surface of the upper mold base 101, thereby facilitating injection molding into the mold cavity.
[0030] In summary, compared with the prior art, the present invention has the following beneficial effects: 1. It can reduce the difficulty of demoulding injection molded pipe fittings and reduce the possibility of dents on the surface of injection molded pipe fittings; 2. Meet the process requirements of special-shaped injection molding pipe fittings; 3. Maintain the stability of the core during the injection molding process.
[0031] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the guidance of this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.
Claims
1. A continuous piston core pulling device, characterized in that: include: An upper mold (1), wherein a lower mold (2) is provided below the upper mold (1), and the inner cavity of the upper mold (1) and the inner cavity of the lower mold (2) can form a mold cavity; A first core (3), wherein a groove (301) is formed on the top surface of the first core (3), the bottom surface of the groove (301) is arranged as an inclined surface facing the cavity, and a second core (302) is slidably connected in the groove (301); a third core (4), the third core (4) being arranged opposite to the first core (3); a fourth core (5), the fourth core (5) being arranged on the side of the first core (3), a fixing rod (501) being slidably connected inside the fourth core (5), and a fifth core (502) being fixedly connected to an end of the fixing rod (501); A driving unit (6), wherein the driving unit (6) is capable of driving the first core (3), the second core (302), the third core (4), the fourth core (5), and the fifth core (502) to combine or separate without obstructing each other; The first core (3), the second core (302), the third core (4), the fourth core (5) and the fifth core (502) can constitute the core required for injection molding.
2. A continuous piston core pulling device according to claim 1, characterized in that: The driving part (6) comprises a first cylinder (601) fixedly mounted on the side of the lower mold (2), an output end of the first cylinder (601) is fixedly connected to a moving block (602), and a side surface of the moving block (602) is fixedly connected to the first core (3).
3. The continuous piston core pulling device according to claim 1, characterized in that: The driving unit (6) further comprises a second cylinder (603) fixedly mounted on the side of the lower mold (2), the second cylinder (603) facing the first cylinder (601), an output end of the second cylinder (603) being fixedly connected to a mounting block (604), and a side surface of the mounting block (604) being fixedly connected to the third core (4).
4. A continuous piston core pulling device according to claim 1, characterized in that: The bottom surface of the lower mold (2) is fixedly mounted with a lower mold base (201), a sliding base (605) is fixedly mounted on the side of the lower mold base (201), the sliding base (605) and the lower mold base (201) are tilted, a lifting cylinder (606) is fixedly mounted inside the sliding base (605), an output end of the lifting cylinder (606) is fixedly connected to a lifting block (607), a fixed block (608) is fixedly mounted on the side of the lifting block (607), a side of the fixed block (608) is fixedly connected to the fixed rod (501), a moving cylinder (609) is fixedly mounted on the side of the fixed block (608), an output end of the moving cylinder (609) passes through the fixed block (608) and is fixedly connected to a moving block (610), an end face of the moving block (610) is fixedly connected to the fourth core (5), and the moving block (610) is slidably connected to the top surface of the lifting block (607).
5. A continuous piston core pulling device according to claim 2-3, characterized in that: A clamping block (303) is fixedly mounted on the side of the first core (3), a clamping slot (401) is provided on the end face of the third core (4), the clamping block (303) is adapted to the clamping slot (401), and the clamping block (303) can be clamped with the clamping slot (401).
6. A continuous piston core pulling device according to claims 3-4, characterized in that: The end faces of the fourth core (5) and the fifth core (502) can form an arc surface, and the arc surface is adapted to the surface of the first core (3). The fourth core (5) and the fifth core (502) can be closely attached to the first core (3).
7. The continuous piston core pulling device according to claim 4, characterized in that: The four corners of the bottom surface of the lower die base (201) are fixedly mounted with a mold clamping cylinder (202); the output end of the mold clamping cylinder (202) passes through the lower die base (201) and is fixedly connected to the upper die base (101); and the bottom surface of the upper die base (101) is fixedly connected to the upper die (1).
8. The continuous piston core pulling device according to claim 7, characterized in that: An injection port (102) is fixedly mounted on the top surface of the upper mold base (101).