A cushioning and damping device for a clamping mechanism of an injection molding machine
Patent Information
- Application Number
- CN202610831731.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-10
- Publication Date
- 2026-08-21
AI Technical Summary
[0004]为此，本发明提供一种注塑机合模机构缓冲减震装置，以解决在不增加额外动力源的前提下，利用合模过程中的冲击能量对油缸进行降温的问题
0、设置缓冲减震部件，利用弹簧和阻尼器的协同作用，能够有效吸收注塑机合模时产生的冲击力，避免模具及合模机构因刚性碰撞而损坏，延长设备使用寿命；同时，通过能量转换部件，将合模冲击力转化为压缩流体的压力能，进而驱动流体循环流动对油缸进行冷却降温，实现了能量的回收与再利用，解决了现有缓冲减震装置功能单一、能量浪费的问题。
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Figure CN122606834A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of injection molding machine accessories technology, specifically to a buffer and shock absorption device for the mold clamping mechanism of an injection molding machine. Background Technology
[0002] An injection molding machine is a primary molding device that uses plastic molds to produce various shapes of plastic products from thermoplastic or thermosetting plastics. During the operation of the injection molding machine, the mold closing mechanism needs to drive the moving mold and the fixed mold to close quickly to achieve subsequent injection molding. When the mold closes, a large impact force is generated between the moving mold and the fixed mold. If this impact force is not effectively buffered and absorbed, it will not only generate a lot of noise, but also easily lead to damage to the mold and the components of the mold closing mechanism, affecting the service life of the equipment.
[0003] In the prior art, some injection molding machines are equipped with buffer and shock absorption devices in the mold closing mechanism, such as springs or dampers, to absorb the impact force during mold closing. However, the function of existing buffer and shock absorption devices is relatively simple. They can only passively absorb and dissipate impact energy. This energy is usually lost to the environment in the form of heat and is not effectively utilized. At the same time, when the injection molding machine is working continuously for a long time, its hydraulic cylinder will generate a lot of heat due to frequent operation, resulting in excessively high cylinder temperature, which affects the working stability of the hydraulic system and the service life of the seals. Therefore, how to use the impact energy during the mold closing process to cool the cylinder without adding an additional power source is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention
[0004] Therefore, the present invention provides a buffer and shock absorption device for the mold closing mechanism of an injection molding machine to solve the problem of cooling the hydraulic cylinder by utilizing the impact energy during the mold closing process without adding an additional power source.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a buffer and shock absorption device for the mold clamping mechanism of an injection molding machine, comprising a support plate, a base plate, a buffer and shock absorption component, and an energy conversion component; The support plate is configured as two, which are distributed front to back and can be installed on the front and rear sides of the fixed mold of the injection molding machine. The buffer and shock absorption component is set on the two support plates and absorbs the impact force when the injection molding machine closes the mold. The base plate is fixedly connected to the top of the two support plates. The energy conversion component is configured to use the impact force absorbed when the injection molding machine closes the mold to cool the oil cylinder when the injection molding machine closes the mold, so as to avoid the oil cylinder temperature from getting too high during long-term operation of the injection molding machine.
[0006] Furthermore, the buffer and shock absorption component includes two pressure plates, which are respectively located on one side of two support plates. Two housings are fixedly connected to each of the two support plates. A sliding groove is opened on one side of each of the four housings. Two moving rods are fixedly connected to one side of each of the two pressure plates, and the four moving rods pass through the four sliding grooves and extend into the housings.
[0007] Furthermore, springs are fitted around the four moving rods, and the two ends of the springs are fixedly connected to the pressure plate and the housing, respectively. Dampers are fixedly connected to the two support plates, and one end of each damper is fixedly connected to the two pressure plates, respectively.
[0008] Furthermore, the energy conversion component includes a sleeve that can be connected to the outside of the mold clamping cylinder of the injection molding machine. A sleeve shell is fixedly fitted on the outside of the sleeve, and a spiral blade is fixedly connected between the sleeve shell and the sleeve. Each of the four housings is equipped with a piston, and the four pistons are respectively fixedly connected to the ends of four moving rods.
[0009] Furthermore, the top of the substrate is provided with a pipe 1, and pipe 2 is fixedly connected to both the front and rear sides of the pipe 1. The pipe 2 is L-shaped. Two pipe 3 are fixedly connected to each of the two pipe 2. The four pipe 3 are fixedly connected to the four boxes respectively. One-way valve 1 is provided on each of the two pipe 2. Pipe 4 is fixedly connected between the pipe 1 and the casing. A switch valve is fixedly connected to one end of the pipe 1.
[0010] Furthermore, the top of the first pipe is provided with a fifth pipe, and the front and rear sides of the fifth pipe are fixedly connected with sixth pipes, which are L-shaped. Two seventh pipes are fixedly connected to each of the two sixth pipes, and the four seventh pipes are fixedly connected to the four housings respectively. One-way valves are provided on the two sixth pipes, and overflow valves are provided on the four fourth pipes. The fifth pipe is fixedly connected to the housing with a eighth pipe, and a throttling valve is provided on the eighth pipe. A condensation component is also provided on the fifth pipe.
[0011] Furthermore, the condensation assembly includes a condenser tube that is fixedly connected to the pipe five. The condenser tube is configured to be bent and is made of copper. The top of the substrate is provided with a shell, which is fixedly sleeved on the outside of the condenser tube. Four support rods are fixedly connected between the shell and the substrate.
[0012] Furthermore, a ventilated mesh is fixedly connected to the rear side of the housing, two fans are embedded in the front side of the housing, and multiple heat dissipation fins are fixedly embedded in the condenser tube, with the multiple heat dissipation fins passing through the ventilated mesh and fixedly connected to it.
[0013] Furthermore, two vertically distributed reinforcing rods are fixedly connected between the two support plates.
[0014] The beneficial effects of this invention are: 0. The installation of buffer and shock absorption components, utilizing the synergistic effect of springs and dampers, effectively absorbs the impact force generated during mold closing of the injection molding machine, preventing damage to the mold and mold closing mechanism due to rigid collisions and extending the service life of the equipment. At the same time, through energy conversion components, the impact force of mold closing is converted into the pressure energy of compressed fluid, which then drives the fluid circulation to cool the oil cylinder, realizing energy recovery and reuse, and solving the problems of single function and energy waste of existing buffer and shock absorption devices.
[0015] 0. When in use, the energy conversion component absorbs the impact force during mold closing of the injection molding machine to cool the hydraulic cylinder during mold closing. It can achieve the dual functions of mold closing buffering and shock absorption and hydraulic cylinder cooling without the need for external additional energy, effectively avoiding excessively high hydraulic cylinder temperature during long-term operation. Attached Figure Description
[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 Provided by the present invention Figure 1 Front view sectional view Figure 1 ; Figure 3 Provided by the present invention Figure 1 Front view sectional view Figure 2 ; Figure 4 A perspective view of the components provided by this invention, including the condenser tube, housing, pipe one, one-way valve one, one-way valve two, and housing. Figure 5 Provided by the present invention Figure 4 Exploded 3D view; Figure 6 Provided by the present invention Figure 1 Rear view stereoscopic view; Figure 7 This is a schematic diagram of the device provided by the present invention installed on an injection molding machine; Figure 8 Provided by the present invention Figure 7 Explosion 3D view.
[0019] In the diagram: 1. Support plate; 2. Base plate; 3. Pressure plate; 4. Housing; 5. Moving rod; 6. Spring; 7. Damper; 8. Sleeve; 9. Shell; 10. Spiral blade; 11. Pipe; 12. Pipe 1; 13. Pipe 2; 14. Pipe 3; 15. One-way valve 1; 16. Pipe 4; 17. Throttling valve; 18. Switch valve; 19. Pipe 5; 20. Pipe 6; 21. Pipe 7; 22. One-way valve 2; 23. Overflow valve; 24. Pipe 8; 25. Condenser pipe; 26. Housing; 27. Support rod; 28. Ventilation mesh; 29. Fan; 30. Heat dissipation fins; 31. Reinforcing rod. Detailed Implementation
[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0021] Please see Figures 1 to 8 The present invention provides a buffer and shock absorption device for the mold clamping mechanism of an injection molding machine, including a support plate 1, a base plate 2, a buffer and shock absorption component and an energy conversion component; like Figure 7 and Figure 8 As shown, there are two support plates 1, which are distributed front and back and can be installed on the front and back sides of the injection molding machine's fixed mold. In actual installation, the support plates 1 can be fixed to the side wall of the injection molding machine's fixed mold by bolts or other fasteners. The base plate 2 is fixedly connected to the top of the two support plates 1. The support plates 1 and the base plate 2 are preferably fixed by metal welding or bolt connection to ensure structural strength. The buffer and shock absorption components are installed on the two support plates 1, mainly used to absorb the impact force when the injection molding machine closes the mold. Specifically, for example... Figure 1 , Figure 2 As shown, the buffer and shock absorption component includes two pressure plates 3, which are located on one side of the two support plates 1, that is, the side closer to the moving mold. Two boxes 4 are fixedly connected to each of the two support plates 1, for a total of four boxes 4. Each box 4 has a sliding groove on the side facing the pressure plate 3. Two moving rods 5 are fixedly connected to one side of the two pressure plates 3, for a total of four moving rods 5. The four moving rods 5 pass through the four sliding grooves and extend into the inside of the box 4. The moving rods 5 can slide in the sliding grooves. like Figure 2 and Figure 5As shown, springs 6 are fitted around the four moving rods 5. The two ends of the springs 6 are fixedly connected to the pressure plate 3 and the outer wall of the box 4, respectively. When the moving mold closes, the moving surface of the moving mold first contacts and pushes the two pressure plates 3. The pressure plates 3 drive the moving rods 5 to move into the box 4. At this time, the springs 6 are compressed and store elastic potential energy, thereby absorbing part of the impact kinetic energy when the mold closes. At the same time, dampers 7 are also fixedly connected to the two support plates 1. In this embodiment, hydraulic dampers or pneumatic dampers are preferred. One end of the piston rod of the damper 7 is fixedly connected to the pressure plate 3. When the pressure plate 3 moves back when the mold opens, the damper 7 absorbs the force of the spring 6 to avoid rapid rebound. The energy conversion component is configured to utilize the impact force during mold closing to cool the injection molding machine's hydraulic cylinder, such as... Figure 2 , Figure 3 As shown, the energy conversion component includes a sleeve 8 that can be connected to the outside of the injection molding machine's clamping cylinder. The sleeve 8 is installed on the outer wall of the cylinder by means of flange, clamp, or adhesive to fit tightly against the cylinder surface. A sleeve shell 9 is fixedly fitted on the outside of the sleeve 8, and an annular cavity is formed between the sleeve shell 9 and the sleeve 8. A spiral blade 10 is fixedly connected in the cavity. The spiral blade 10 is spirally wound around the outside of the sleeve 8, so that the fluid can flow along the spiral path when it flows through the sleeve shell 9, thereby prolonging the residence time of the fluid on the surface of the sleeve 8 and enhancing the heat exchange effect. Each of the four housings 4 is equipped with a piston 11. The four pistons 11 are fixedly connected to the ends of the four moving rods 5 located inside the housings 4. When the moving rods 5 are pushed into the housings 4 by the pressure plate 3, the pistons 11 move accordingly, compressing the fluid (such as Freon or other phase change refrigerants) pre-filled in the housings 4. This compression process converts the mechanical energy of the mold closing into the pressure energy of the fluid. The pistons 11 and the housings 4 are also equipped with existing piston rings to prevent fluid leakage. Please see Figure 2 , Figure 4 and Figure 6The base plate 2 has a pipe 12 on its top. Pipes 2 13 are fixedly connected to both the front and rear sides of pipe 12. Pipes 2 13 are L-shaped. Two pipes 3 14 are fixedly connected to each of the two pipes 2 13. The four pipes 3 14 are fixedly connected to the side walls of the four housings 4. One-way valves 15 are installed on the two pipes 2 13. The direction of flow of the one-way valves 15 is from pipe 2 13 towards pipe 3 14, allowing fluid to flow from pipe 2 13 into the housing 4. A pipe 4 16 is fixedly connected between pipe 12 and the housing 9. One end of pipe 12 is also... A fixed connection of switch valve 18 is provided. Through the setting of switch valve 18, the entire energy conversion component (including the closed loop system composed of housing 4, pipe 12, pipe 23, pipe 314, pipe 416, pipe 519, pipe 620, pipe 721, pipe 824, and casing 9) can be vacuumed. After vacuuming, a predetermined amount of Freon refrigerant is charged into the system through switch valve 18, thereby ensuring that the energy conversion component can perform normal compression, condensation, heat absorption and other cyclic operations. After charging is completed, switch valve 18 can be closed. After the mold is closed, the moving mold retracts and opens, the spring 6 returns to its original position, pushing the pressure plate 3 and the moving rod 5 to move outward, and the piston 11 moves in the opposite direction inside the housing 4, so that a negative pressure is formed in the inner cavity of the housing 4. At this time, the one-way valve 15 opens, and the fluid that has absorbed the heat of the oil cylinder in the housing 9 is drawn back into the four housings 4 through the pipe 4 16, the pipe 12, the pipe 2 13 and the pipe 3 14, completing the fluid return cycle. Please see Figure 3 and Figure 4 Pipe 12 has a pipe 5 19 at its top. Pipe 5 19 is fixedly connected to pipe 6 20 on both its front and rear sides. Pipe 6 20 is also L-shaped. Two pipes 7 21 are fixedly connected to each of the two pipes 6 20. The four pipes 7 21 are fixedly connected to the four housings 4. One-way valves 22 are installed on the two pipes 6 20. The direction of flow of one-way valves 22 is from pipe 7 21 towards pipe 6 20, allowing fluid to flow out of the housing 4. Overflow valves 23 are installed on each of the four pipes 4 16 near pipe 12. Pipe 5 19 is fixedly connected to housing 9 by pipe 8 24. Pipe 8 24 is equipped with a throttle valve 17 to control the flow rate and pressure of fluid flowing into housing 9. A condenser assembly is also installed on pipe 5 19.
[0022] When the injection molding machine closes the mold and the piston 11 compresses the fluid in the housing 4, the fluid pressure rises sharply. When the pressure reaches the set threshold of the overflow valve 23 (for example, higher than the normal operating pressure of the system), the overflow valve 23 opens. The compressed high-pressure and high-temperature fluid passes through pipe seven 21, one-way valve two 22, and pipe six 20 in sequence into pipe five 19. Then it flows through the condenser assembly to dissipate heat. After condensation, the fluid becomes a low-temperature and high-pressure liquid. This low-temperature and high-pressure liquid then passes through pipe eight 24, is throttled and depressurized by the throttle valve 17, and finally enters the housing 9. The fluid flows along the spiral blade 10 in the housing 9 and exchanges heat with the injection cylinder with a high surface temperature, absorbing the heat of the cylinder and thus cooling the cylinder. Furthermore, such as Figure 3 and Figure 5 As shown, the condensing assembly includes a condenser tube 25 that is fixedly connected to the pipe 19. The condenser tube 25 is set in a continuous bend and is made of copper material with good thermal conductivity. The top of the substrate 2 is provided with a shell 26. The shell 26 is a rectangular metal shell that is fixedly sleeved on the outside of the condenser tube 25. Four support rods 27 are fixedly connected between the shell 26 and the substrate 2 to stably support the shell 26 above the substrate 2. like Figure 1 and Figure 6 As shown, a vent mesh 28 is fixedly connected to the rear side of the housing 26, and two fans 29 are embedded in the front side of the housing 26. Multiple heat dissipation fins 30 (preferably aluminum fins) are fixedly embedded in the condenser tube 25 and are distributed vertically and vertically at equal intervals. The multiple heat dissipation fins 30 all pass through the vent mesh 28 and are fixedly connected to it. When the high-temperature fluid flows into the condenser tube 25, the fans 29 start, forcing the outside air to enter the housing 26 from the vent mesh 28, flow through the heat dissipation fins 30 and the surface of the condenser tube 25, and carry away the heat, thereby turning the fluid into a room temperature high-pressure liquid. To improve the overall structural strength of the device, two vertically distributed reinforcing rods 31 are fixedly connected between the two support plates 1 (e.g., Figure 6 As shown), the reinforcing rod 31 horizontally spans the two support plates 1 and is fixed by bolts or welding, which effectively prevents the two support plates 1 from lateral displacement or deformation when subjected to repeated impact forces. The specific operating procedure of this device is as follows: Install this device on both the front and rear sides of the fixed mold of the injection molding machine. The sleeve 8 is fitted onto the outside of the injection molding machine's hydraulic cylinder. When the injection molding machine's hydraulic cylinder drives the moving mold to move and close with the fixed mold, the moving mold first pushes the two pressure plates 3. The pressure plates 3 then drive the four moving rods 5 and the piston 11 to move to the right (e.g., ...). Figure 2 (Direction), compressing spring 6 and damper 7 to achieve buffering and shock absorption, while compressing the fluid (Freon) in the housing 4. When the mold is closed to the end point and the pressure inside the housing 4 reaches its maximum value, the overflow valve 23 opens. The compressed high-pressure and high-temperature fluid enters the pipe 5 19 through pipe 7 21, pipe 6 20, and check valve 2 22, and flows through the condenser pipe 25. At this time, the fan 29 works and releases heat to the fluid in the condenser pipe 25 through the heat dissipation fins 30, causing the fluid to condense into a room-temperature high-pressure liquid. This liquid enters the casing 9 through pipe 8 24 and throttle valve 17, and flows spirally along the sleeve 8 under the action of the spiral blades 10, absorbing the heat of the oil cylinder. When the mold opens, the moving mold retracts, the spring 6 rebounds, pushing the pressure plate 3, the moving rod 5, and the piston 11 to reset. At this time, a negative pressure is generated in the box 4, the one-way valve 15 opens, and the fluid that has absorbed heat in the casing 9 is drawn back into the box 4 through pipe 4 16, pipe 1 12, pipe 2 13, and pipe 3 14, waiting for the next mold closing compression. Through the above cycle, this device achieves the dual functions of mold closing buffering and shock absorption and oil cylinder cooling without the need for external additional energy, effectively avoiding excessively high oil cylinder operating temperature for a long time. Finally, it is readily apparent that all content not described in detail in this specification, except as described above, is prior art known to those skilled in the art.
[0023] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A buffer and shock absorption device for the mold clamping mechanism of an injection molding machine, characterized in that, Includes a support plate (1), a base plate (2), a shock-absorbing component, and an energy conversion component; The support plate (1) is set to two, and the two support plates (1) are distributed front and back and can be installed on the front and back sides of the fixed mold of the injection molding machine. The buffer and shock absorption component is set on the two support plates (1) and absorbs the impact force when the injection molding machine closes the mold. The base plate (2) is fixedly connected to the top of the two support plates (1). The energy conversion component is configured to use the impact force absorbed when the injection molding machine closes the mold to cool down the oil cylinder when the injection molding machine closes the mold, so as to avoid the oil cylinder temperature from being too high during long-term operation of the injection molding machine.
2. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: The buffer and shock absorption component includes two pressure plates (3), which are located on one side of two support plates (1). Two boxes (4) are fixedly connected to each of the two support plates (1). A sliding groove is provided on one side of each of the four boxes (4). Two moving rods (5) are fixedly connected to one side of each of the two pressure plates (3), and the four moving rods (5) pass through the four sliding grooves and extend into the boxes (4).
3. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 2, characterized in that: All four movable rods (5) are fitted with springs (6), and the two ends of the springs (6) are fixedly connected to the pressure plate (3) and the box (4) respectively. The two support plates (1) are fixedly connected with dampers (7), and one end of the two dampers (7) is fixedly connected to the two pressure plates (3) respectively.
4. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 1 or 2, characterized in that: The energy conversion component includes a sleeve (8) that can be connected to the outside of the mold clamping cylinder of the injection molding machine. A housing (9) is fixedly fitted on the outside of the sleeve (8). A spiral blade (10) is fixedly connected between the housing (9) and the sleeve (8). A piston (11) is provided inside each of the four housings (4). The four pistons (11) are fixedly connected to the ends of the four moving rods (5) respectively.
5. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 4, characterized in that: The base plate (2) is provided with a pipe 1 (12) at the top. The pipe 1 (12) is fixedly connected to the front and rear sides of the pipe 2 (13), and the pipe 2 (13) is set in an L shape. The two pipe 2 (13) are fixedly connected to two pipe 3 (14). The four pipe 3 (14) are fixedly connected to the four boxes (4) respectively. The two pipe 2 (13) are provided with a one-way valve 1 (15). The pipe 1 (12) is fixedly connected to the casing (9) with a pipe 4 (16). One end of the pipe 1 (12) is fixedly connected to a switch valve (18).
6. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 5, characterized in that: The top of the first pipe (12) is provided with a fifth pipe (19). The fifth pipe (19) is fixedly connected to the front and rear sides with a sixth pipe (20), and the sixth pipe (20) is set in an L shape. The two sixth pipes (20) are fixedly connected to two seventh pipes (21). The four seventh pipes (21) are fixedly connected to the four boxes (4). The two sixth pipes (20) are provided with a one-way valve (22). The four fourth pipes (16) are provided with an overflow valve (23). The fifth pipe (19) is fixedly connected to the casing (9) with a eighth pipe (24). The eighth pipe (24) is provided with a throttle valve (17). The fifth pipe (19) is also provided with a condenser assembly.
7. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 6, characterized in that: The condensation assembly includes a condenser tube (25) that is fixedly connected to the pipe five (19). The condenser tube (25) is bent and made of copper. The top of the substrate (2) is provided with a shell (26). The shell (26) is fixedly sleeved on the outside of the condenser tube (25). Four support rods (27) are fixedly connected between the shell (26) and the substrate (2).
8. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 7, characterized in that: A ventilated mesh (28) is fixedly connected to the rear side of the housing (26), and two fans (29) are embedded in the front side of the housing (26). Multiple heat dissipation fins (30) are fixedly embedded on the condenser pipe (25) and are distributed at equal intervals. All the heat dissipation fins (30) pass through the ventilated mesh (28) and are fixedly connected to it.
9. The buffer and shock absorption device for the mold clamping mechanism of an injection molding machine according to claim 1, characterized in that: Two reinforcing rods (31) are fixedly connected between the two support plates (1) and are distributed vertically.