CN214982961U - Hydraulic two-plate type plastic injection molding machine - Google Patents
Hydraulic two-plate type plastic injection molding machine Download PDFInfo
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- CN214982961U CN214982961U CN202121500178.4U CN202121500178U CN214982961U CN 214982961 U CN214982961 U CN 214982961U CN 202121500178 U CN202121500178 U CN 202121500178U CN 214982961 U CN214982961 U CN 214982961U
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Abstract
The utility model provides a two board-like plastic injection molding machines of hydraulic pressure relates to injection molding machine, die casting machine, moulding press, rubber machine. The single-cylinder injection device completes injection molding work, and the hydraulic power system provides hydraulic power for the single-cylinder injection device, the mold locking oil cylinder and the mold moving oil cylinder. The injection molding machine has the beneficial effects that the mold locking oil cylinders are arranged on the movable template, the reinforcing plate and the movable template are connected into a whole through the brace, the bending deformation of the movable template after high-pressure mold locking is reduced, the rigidity of the movable template is ensured, the movable template is quickly close to the fixed template in a pulling mode through the action of the mold moving oil cylinder to complete mold locking, four mold locking oil cylinders at four corners of the movable template complete high-pressure mold locking after mold locking is completed, the structural stability is good, the mold locking precision is high, and the stress is balanced; the single-cylinder injection device has stable start, small motion inertia and high control precision under the same condition, and is particularly suitable for high-speed injection molding machines.
Description
Technical Field
The utility model belongs to the technical field of injection moulding equipment technique and specifically relates to a two board-like plastic injection moulding machines of hydraulic pressure.
Background
An injection molding machine is also known as a plastic injection molding machine or an injection machine. It is a main forming equipment for making various shaped plastic products from thermoplastic plastics or thermosetting plastics by using plastic forming mould. The method is divided into a mechanical type, a hydraulic type, a machine-liquid mixed type and a full-electric type. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. The mold locking device is used in the injection molding machine and has the function of ensuring that the molding mold can be opened and closed flexibly, accurately, quickly, reliably and safely and ensuring that the mold cavity is tightly closed and the plastic melt cannot overflow out of the mold cavity. The mold locking device comprises a fixed mold plate and a movable mold plate, the traditional mold locking mode is that a hydraulic oil cylinder is adopted to push the movable mold plate to be close to the fixed mold plate, but the stability of the pushing mode is poor, and the traditional mold locking device also has the problems of serious abrasion, uneven stress of a pull rod and low mold locking precision, so that the quality of a product is influenced. In addition, the conventional mold locking device is provided with a fixed mold plate, a movable mold plate, a tail plate, a toggle rod, a pin shaft and a steel sleeve, and has a complex structure, high requirement on the processing precision of parts and heavy structure; the conventional injection device is used for double-cylinder injection, the structure has large motion inertia, and the problems of left and right asynchronism and the like exist during quick start, so that the injection control precision is greatly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes shortcoming among the prior art provides a two board-like plastic injection molding machines of hydraulic pressure, through the effect of moving the mould hydro-cylinder, makes the movable mould board be close to with the fixed die plate fast with the mode of pulling and accomplishes the compound die, and stability is good, and in addition, the mould hydro-cylinder that moves can accelerate die sinking and compound die speed to shorten production cycle, improve production efficiency, in addition, the mode locking hydro-cylinder and the mould hydro-cylinder that moves are fixed mounting on the movable mould board.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a hydraulic two-plate plastic injection molding machine comprises a machine tool body, wherein a single-cylinder injection device is arranged on the machine tool body; a fixed template and a movable template are slidably arranged on the machine body, four corners of the movable template are provided with mold locking oil cylinders, mold locking piston rods are arranged in the mold locking oil cylinders, and one ends of the mold locking piston rods penetrate through the movable template and are connected to the fixed template; the movable mould is characterized in that a mould moving oil cylinder is arranged on the movable mould plate, a mould moving piston rod is arranged in the mould moving oil cylinder, and one end of the mould moving piston rod penetrates through the movable mould plate and is connected to the fixed mould plate.
Preferably, be provided with the reinforcing plate on the machine lathe bed, reinforcing plate, fixed die plate and movable mould board three parallel arrangement, the mode locking hydro-cylinder includes the rear end cap, the thickness size of reinforcing plate all is less than the thickness size of fixed die plate and movable mould board, be provided with the connecting hole on the reinforcing plate and on the rear end cap, still include the brace, the brace runs through connecting hole assembly on the movable mould board on reinforcing plate and the rear end cap, four the mode locking hydro-cylinder with the reinforcing plate links to form the frame form as a whole, and the bending deformation of movable mould board when greatly reducing high pressure mode locking improves machine performance.
Preferably, the single cylinder injection device comprises a nozzle, a barrel and a screw which are arranged at the front end; the injection molding machine also comprises a glue injection head plate, a glue injection second plate, an injection oil cylinder, a transmission shaft and an oil motor; two parallel injection linear guide rails are further arranged at the bottoms of the glue injection head plate and the glue injection second plate; the single-cylinder injection device is connected with the fixed template for matching use; the key point is that the single-cylinder injection oil cylinder is coaxial with the screw rod, and the problem of asynchronous double-cylinder injection is solved.
Preferably, the number of the mold moving oil cylinders is two, the mold moving oil cylinders are arranged at two ends of one diagonal line of the movable mold plate, mold moving front end covers are arranged on the movable mold plate, connecting plates are arranged on the fixed mold plate, the mold moving oil cylinders are fixedly connected on the movable mold plate, the end portions of the mold moving piston rods are connected on the connecting plates, mold moving rear end covers are further arranged at the end portions of the mold moving oil cylinders, and the diameter size of the mold moving oil cylinders is smaller than that of the mold locking oil cylinders.
Preferably, a logic valve control channel is arranged at the central axis of the mold locking piston rod, and the driving oil path is located in the logic valve control channel.
Preferably, the front end of the mold locking piston is provided with a locking ring, a guide ring is arranged in the mold locking oil cylinder, the mold locking piston rod is sleeved in the guide ring in a penetrating manner, and the movable mold plate is further provided with a guide ring gland.
Preferably, the movable mold plate is provided with an ejection mechanism, the ejection mechanism comprises a support, the support is provided with a thimble oil cylinder, the thimble oil cylinder is internally provided with an ejection piston rod, and the ejection piston rod penetrates through the movable mold plate.
Preferably, the two sides of the bottoms of the movable template and the reinforcing plate are respectively provided with a mold locking linear guide rail, the mold locking linear guide rails are arranged on the machine tool body, and the movable template and the reinforcing plate move back and forth on the mold locking linear guide rails to realize opening and closing; the single-cylinder injection device is connected to the injection linear guide rail in a sliding mode, and the injection linear guide rail is arranged on the machine tool body.
Preferably, a hydraulic power system is arranged on the machine body and communicated with a hydraulic oil plate, and the hydraulic oil plate is communicated with a mold locking oil cylinder, an ejector pin oil cylinder, an injection oil cylinder and a mold moving oil cylinder.
Preferably, an electrical control system is arranged on the machine bed.
Compared with the prior art, the beneficial effects of the utility model are that:
the movable template and the reinforcing plate of the injection molding machine are slidably arranged on a machine tool, and the reinforcing plate and the mold locking oil cylinders are connected on the movable template through the diagonal four mold locking oil cylinder braces to form a movable frame structure, so that the bending deformation of the movable template during high-pressure mold locking can be greatly reduced; the high-speed opening and closing die is dragged by a diagonal die-moving oil cylinder, and as the inner diameter of the die-moving oil cylinder is smaller, a logic valve in a die-locking piston is in a normally open state when the high-speed opening and closing die is added, oil liquid in a rod cavity and a rodless cavity can freely flow, the hydraulic resistance is extremely small, so that the die opening speed is extremely high, and the production efficiency can be effectively improved; the mold locking structure is of a two-plate type, and one template is less than that of a common injection molding machine, so that the use amount of steel is reduced, and the weight of the whole machine is reduced; the movable mould plate and the mould have self-adaptability, so that the stress unbalance of the four pull rods can be controlled within 0.5 percent, and the precision of the stress balance of the pull rods is improved by ten times compared with that of the pull rods of a common injection molding machine; during injection, the moving parts are few, the weight is light, so the moving inertia is small, and in addition, the injection oil cylinder is coaxial with the screw rod, the problem of asynchronous double-cylinder injection is solved, and the injection control precision and the product precision are greatly improved.
Drawings
FIG. 1 is a general view of a hydraulic two-plate plastic injection molding machine according to the present embodiment;
FIG. 2 is a schematic structural diagram of the fixed die plate, the movable die plate, the mold locking cylinder and the mold moving cylinder according to the embodiment;
fig. 3 is a schematic view of the internal structure of the mold clamping cylinder according to this embodiment.
In the figure: 1-machine bed, 3-single cylinder injection device, 31-nozzle, 4-fixed die plate, 41-spigot position, 42-connecting plate, 5-movable die plate, 51-mould-moving front end cover, 52-guide ring gland, 6-mould-locking oil cylinder, 61-mould-locking piston rod, 611-mould-locking piston, 6111-logic valve, 612-logic valve control channel, 62-rear end cover, 63-first cavity, 64-second cavity, 65-locking ring, 66-guide ring, 7-mould-moving oil cylinder, 71-mould-moving piston rod, 8-reinforcing plate, 9-bracket, 10-ejector pin cylinder, 11-ejector piston rod, 12-mould-locking linear guide rail, 13-injection linear guide rail, 14-hydraulic power system, 15-hydraulic oil plate, 16-brace, 17-electrical control system.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1 to 3, a hydraulic two-plate plastic injection molding machine comprises a machine bed 1, wherein a single-cylinder injection device 3 is arranged on the machine bed 1, a fixed mold plate 4 and a movable mold plate 5 are arranged on the machine bed 1 in a sliding manner, and the single-cylinder injection device 3 comprises a nozzle 31, a machine barrel and a screw rod which are arranged at the front end; the injection molding machine also comprises a glue injection head plate, a glue injection second plate, an injection oil cylinder, a transmission shaft and an oil motor; penetrate and glue first board and penetrate gluey two board bottoms and still be provided with two parallel injection linear guide rails 13, injection linear guide rail 13 sets up on machine lathe bed 1, single cylinder injection unit 3 sliding connection is on injection linear guide rail 13, single cylinder injection unit 3 is connected supporting use with fixed die plate 4, the department that corresponds of fixed die plate 4 is provided with socket position 41 that supplies nozzle 31 to get into, socket position 41 runs through fixed die plate 4, the raw materials gets into single cylinder injection unit 3 and heats, then single cylinder injection unit 3 is close to toward fixed die plate 4 under the effect of external actuating mechanism, nozzle 31 inserts to socket position 41, the raw materials after the heating are penetrated to and are annotated between fixed die plate 4 and the movable die plate 5 through single cylinder injection unit 3, nozzle 31, this injection molding machine adopts single cylinder injection unit, compare with the traditional double-cylinder formula barrel that adopts, light in weight, easily promote.
A mold locking oil cylinder 6 is arranged on the movable mold plate 5, a mold locking piston rod 61 is arranged in the mold locking oil cylinder 6, and one end of the mold locking piston rod 61 penetrates through the movable mold plate 5 and is connected to the fixed mold plate 4; a moving die oil cylinder 7 is arranged on the moving die plate 5, a moving die piston rod 71 is arranged in the moving die oil cylinder 7, and one end of the moving die piston rod 71 penetrates through the moving die plate 5 and is connected to the fixed die plate 4; the machine tool body 1 is provided with a reinforcing plate 8, the machine tool body 1 is provided with a mold locking linear guide rail 12, a movable mold plate 5 and the reinforcing plate 8 are connected to the mold locking linear guide rail 12 in a sliding manner, the reinforcing plate 8, a fixed mold plate 4 and the movable mold plate 5 are arranged in parallel, a mold locking oil cylinder 6 comprises a rear end cover 62, connecting holes are formed in the reinforcing plate 8 and the rear end cover 62, a brace 16 is further included, the brace 16 penetrates through the connecting holes in the reinforcing plate 8 and the rear end cover 62 to be assembled on the movable mold plate 5, external threads are arranged on the brace 16 and matched with the brace locking nut for use, when the brace 16 connects the reinforcing plate 8, the rear end cover 62 and the mold locking oil cylinder 6 to the movable mold plate 5, the brace locking nut is screwed on the end part of the brace 16, so that the reinforcing plate 8, the mold locking oil cylinder 6 and the movable mold plate 5 are locked into a whole, and the four mold locking oil cylinders 6 and the reinforcing plate 8 are connected into a whole into a frame shape, therefore, the stress is better, and the reinforcing plate 8 is not easy to deform; in addition, because the mold locking oil cylinder 6 is detachably arranged on the movable mold plate 5, the mold locking oil cylinders 6 with different lengths can be flexibly replaced according to actual requirements for use, namely, the distance between the movable mold plate 5 and the fixed mold plate 4 is controlled, and the mold locking oil cylinder is suitable for processing molds with different lengths to overcome the defects that the fixed mold plate and the movable mold plate in the traditional injection molding machine are fixed in length and cannot be flexibly lengthened. The connecting holes are used for the brace 16 to penetrate through, the brace locking nut is used for being screwed on the brace 16, the reinforcing plate 8 plays a role in supporting and balancing the tail of the mold locking oil cylinder 6 and also achieves the purpose of stabilizing the reinforcing structure, and the thickness of the reinforcing plate 8 is smaller than that of the fixed template 4 and the movable template 5, so that the weight is light, and the quality of the whole machine is reduced.
The number of the mould moving oil cylinders 7 is two, the mould moving oil cylinders are arranged at two ends of one diagonal line of the movable mould plate 5, the movable mould plate 5 is provided with a mould moving front end cover 51, the fixed mould plate 4 is provided with a connecting plate 42, the mould moving oil cylinders 7 are connected and fixed on the mould moving front end cover 51 of the movable mould plate 5, the end parts of the mould moving piston rods 71 are connected on the connecting plate 42, the end parts of the mould moving oil cylinders 7 are also provided with a mould moving rear end cover, and the diameter size of the mould moving oil cylinders 7 is smaller than that of the mould locking oil cylinders 6, so that the mould moving oil cylinders 7 can be quickly filled with the internal liquid oil relative to the mould locking oil cylinders 6, and the action is quick.
The working principle here is that, compared with the traditional injection molding machine, the movable mold plate 5 of the injection molding machine is slidably mounted on the machine bed 1, when mold closing is needed, the mold-moving piston rod 71 is recovered into the mold-moving cylinder 7, the mold-moving cylinder 7 moves together with the movable mold plate 5, the movable mold plate 5 is close to the fixed mold plate 4 in a pulling mode to complete mold closing, the stability of the pulling mold closing mode is better, in addition, no matter in mold closing or mold opening, the mold-moving cylinder 7 can be filled quickly because the cylinder diameter of the mold-moving cylinder 7 is smaller, the mold-moving piston rod 71 can be recovered or extended quickly to enable the movable mold plate 5 and the fixed mold plate 4 to be closed or separated preliminarily, and then the mold-locking piston rod 61 is recovered or extended to lock or separate the movable mold plate 5 and the fixed mold plate 4 in a high strength, so that the processing speed is high, and the production efficiency is improved.
The ejection mechanism is arranged on the movable mould plate 5 and comprises a support 9, an ejector pin oil cylinder 10 is arranged on the support 9, an ejection piston rod 11 is arranged in the ejector pin oil cylinder 10, the ejection piston rod 11 penetrates through the movable mould plate 5, when the mould is opened, the ejection piston rod 11 is driven by the air cylinder 10 to extend out and penetrate through the movable mould plate 5, an injection molding piece can be ejected out, and then the ejection piston rod 11 is driven by the air cylinder 10 to be recovered to wait for the next round of work.
The mold locking piston rod 61 includes a mold locking piston 611, the mold locking piston 611 divides the interior of the mold locking cylinder 6 into a first cavity 63 and a second cavity 64, a logic valve 6111 is disposed in the mold locking piston 611, the mold locking piston 611 is provided with a first piston port and a second piston port, the logic valve 6111 includes a valve body, the valve body is provided with a first valve port and a second valve port, the first valve port is communicated with the first piston port, the second valve port is communicated with the second piston port, the valve body is provided with a valve core, the valve core is connected with a driving oil path, the driving oil path drives the valve core to move, so as to control opening and closing of a channel between the first valve port and the second valve port, and finally, the purpose of controlling opening and closing between the first inner cavity 63 and the second inner cavity 64 is achieved, the first valve port, the second valve port, and the valve core are all prior art of the logic valve 6111, and no further description is given here.
When the driving oil way drives the valve core to move towards one side, a channel between the first valve port and the second valve port is blocked, namely oil between the first inner cavity 63 and the second inner cavity 64 cannot mutually circulate, and the pressure stabilizing effect is achieved at the moment; when the driving oil way cancels the output power, the valve core can reset, the first inner cavity 63 is communicated with the second inner cavity 64, oil can flow mutually, the mode locking piston 611 can move conveniently at the moment, the driving force is small, and the energy consumption is saved. A logic valve control channel 612 is arranged at the central axis of the mold locking piston rod 61, and a driving oil path is positioned in the logic valve control channel 612, so that the interference on the left and right movement of the mold locking piston rod 61 is avoided.
The front end of the mold locking piston 611 is fixedly connected with a locking ring 65, the mold locking piston 611 is driven into the mold locking piston 611 through a mounting bolt in the locking ring 65, the mold locking piston 611 is fixedly mounted on the mold locking piston rod 61, a guide ring 66 is arranged in the mold locking oil cylinder 6, the mold locking piston rod 61 is sleeved in the guide ring 66 in a penetrating mode, the guide ring 66 has the function of supporting and guiding the mold locking piston rod 61, abrasion caused by direct connection of the mold locking piston rod 61 and the inner wall of the mold locking oil cylinder 6 is avoided, and a guide ring gland 52 is further arranged on the movable mold plate 5 and contributes to limitation of the guide ring 66.
A hydraulic power system 14 is arranged on the machine tool body 1, the hydraulic power system 14 is communicated with a hydraulic oil plate 15, the hydraulic oil plate 15 is communicated with a mold locking oil cylinder 6, an ejector pin oil cylinder 10, an injection oil cylinder and a mold moving oil cylinder 7, and oil output from the hydraulic power system 14 is distributed to the mold locking oil cylinder 6, the ejector pin oil cylinder 10, the injection oil cylinder and the mold moving oil cylinder 7 through the hydraulic oil plate 15 for use. The machine bed 1 is provided with an electrical control system 17, and the electrical control system 17 is used for supplying and controlling the power of the whole machine.
Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements and the like can be made in the technical solutions of the foregoing embodiments or in some technical features of the foregoing embodiments, but all modifications, equivalents, improvements and the like within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A hydraulic two-plate plastic injection molding machine is characterized by comprising a machine body, wherein a single-cylinder injection device is arranged on the machine body; a fixed template and a movable template are slidably arranged on the machine body, four corners of the movable template are provided with mold locking oil cylinders, mold locking piston rods are arranged in the mold locking oil cylinders, and one ends of the mold locking piston rods penetrate through the movable template and are connected to the fixed template; the movable mould is characterized in that a mould moving oil cylinder is arranged on the movable mould plate, a mould moving piston rod is arranged in the mould moving oil cylinder, and one end of the mould moving piston rod penetrates through the movable mould plate and is connected to the fixed mould plate.
2. The hydraulic two-plate plastic injection molding machine according to claim 1, wherein the machine body is provided with a reinforcing plate, the fixed mold plate and the movable mold plate are arranged in parallel, the mold locking cylinder comprises a rear end cover, the thickness of the reinforcing plate is smaller than that of the fixed mold plate and that of the movable mold plate, the reinforcing plate and the rear end cover are provided with connecting holes, and the machine further comprises a brace, the brace is assembled on the movable mold plate through the connecting holes of the reinforcing plate and the rear end cover, and four mold locking cylinders and the reinforcing plate are connected to form a frame.
3. A hydraulic two-plate plastic injection molding machine according to claim 2, wherein the single cylinder injection unit includes a nozzle, a barrel, and a screw disposed at a front end; the injection molding machine also comprises a glue injection head plate, a glue injection second plate, an injection oil cylinder, a transmission shaft and an oil motor; two parallel injection linear guide rails are further arranged at the bottoms of the glue injection head plate and the glue injection second plate; the single-cylinder injection device is connected with the fixed template for matching use.
4. The hydraulic two-plate plastic injection molding machine according to claim 1, wherein the number of the mold-moving cylinders is two, and the two mold-moving cylinders are disposed at two ends of one diagonal line of the movable mold plate, the movable mold plate is provided with a mold-moving front end cap, the fixed mold plate is provided with a connecting plate, the mold-moving cylinders are fixedly connected to the movable mold plate, the ends of the mold-moving piston rods are connected to the connecting plate, the ends of the mold-moving cylinders are further provided with mold-moving rear end caps, and the diameter of the mold-moving cylinders is smaller than that of the mold-locking cylinders.
5. The hydraulic two-plate plastic injection molding machine according to claim 1, wherein a logic valve control passage is provided at a central axis of the mold clamping piston rod, and a driving oil passage is provided in the logic valve control passage.
6. The hydraulic two-plate plastic injection molding machine according to claim 5, wherein a locking ring is provided at the front end of the mold locking piston, a guide ring is provided in the mold locking cylinder, the mold locking piston rod is inserted in the guide ring, and a guide ring gland is further provided on the movable platen.
7. The hydraulic two-plate plastic injection molding machine according to claim 3, wherein the movable mold plate is provided with an ejection mechanism, the ejection mechanism comprises a support, the support is provided with an ejector pin cylinder, an ejection piston rod is arranged in the ejector pin cylinder, and the ejection piston rod penetrates through the movable mold plate.
8. A hydraulic two-plate type plastic injection molding machine according to claim 3, wherein the movable platen and the reinforcing plate are provided with mold-locking linear guides on both sides of the bottom thereof, the mold-locking linear guides being provided on the machine body, the movable platen and the reinforcing plate moving back and forth on the mold-locking linear guides to open and close the molds; the single-cylinder injection device is connected to the injection linear guide rail in a sliding mode.
9. The hydraulic two-plate plastic injection molding machine according to claim 7, wherein the machine body is provided with a hydraulic power system, the hydraulic power system is communicated with a hydraulic oil plate, and the hydraulic oil plate is communicated with the mold locking cylinder, the mold moving cylinder, the ejector pin cylinder and the injection cylinder.
10. A hydraulic two-plate plastic injection molding machine according to claim 9 wherein an electrical control system is provided on the machine bed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121500178.4U CN214982961U (en) | 2021-07-03 | 2021-07-03 | Hydraulic two-plate type plastic injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121500178.4U CN214982961U (en) | 2021-07-03 | 2021-07-03 | Hydraulic two-plate type plastic injection molding machine |
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| CN214982961U true CN214982961U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923025A (en) * | 2022-12-09 | 2023-04-07 | 宁波斗士油压有限公司 | Super-long hot plate silica gel propeller equipment |
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2021
- 2021-07-03 CN CN202121500178.4U patent/CN214982961U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115923025A (en) * | 2022-12-09 | 2023-04-07 | 宁波斗士油压有限公司 | Super-long hot plate silica gel propeller equipment |
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