Injection syringe elastic rubber piston forming device and forming method

Abstract

The invention discloses an injector elastic rubber piston forming device and method, and relates to the technical field of injection molding, the injector elastic rubber piston forming device comprises a supporting cabinet, an injection molding machine used for injection molding is installed on the supporting cabinet, the injector elastic rubber piston forming device further comprises a sliding support arranged at the top of the supporting cabinet, and two sets of mold assemblies used for rubber piston forming are arranged on one side of the sliding support; the two lifting seats are arranged at the two ends of the sliding support correspondingly, lifting assemblies are arranged on the outer sides of the two lifting seats, cleaning assemblies are arranged at the bottoms of the lifting seats, pistons in the mold assembly are pushed out through the pushing mechanism, the interior of the mold assembly is cleaned through the cleaning assemblies, and after cleaning is completed, the pistons in the mold assembly are pushed out through the pushing mechanism. And the linear module moves the cleaned mold assembly to one side of the injection molding machine for injection molding, so that alternate injection molding is carried out, the mold assembly can be cleaned alternately, and the injection molding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a syringe elastic rubber piston molding device and a molding method. Background Art

[0002] A syringe is a common medical device that uses a needle to extract or inject gas or liquid. The piston of a syringe is generally produced by injection molding. With the help of the thrust of the screw, the melted rubber is injected into a closed mold cavity, and the product is obtained after curing and shaping.

[0003] A syringe elastic piston molding device disclosed in a patent application with reference publication number CN210851079U includes a machine base, a mounting platform is provided on the machine base, an injection molding machine barrel is provided on one side of the upper surface of the mounting platform, a screw is rotatably provided in the injection molding machine barrel, a motor is provided at the end of the injection molding machine barrel, the output end of the motor is connected to the screw, a heating hoop is provided on the outer surface of the injection molding machine barrel, a storage bin is connected to the upper surface of the injection molding machine barrel through a feed pipe, a bearing is installed on the inner bottom surface of the storage bin through a mounting frame, one end of a stirring rod is rotatably provided in the bearing, thread grooves are evenly provided on the outer surface of the stirring rod, and a first pulley is provided at the other end of the stirring rod, so that there is no need to manually add rubber particles, the addition amount is controllable, the workload of workers is reduced, the work efficiency is improved, and mass production is facilitated. The rubber particles melt quickly, the molding process is fast and stable, and the product is beautiful.

[0004] During the injection molding process, after the injection molding of the injection mold is completed, it is necessary to wait for the piston to cool and form before the next injection mold can be injected. The injection-molded piston is easy to get stuck inside the injection groove during the removal process, making it difficult to remove. In addition, waste chips are often adhered to the mold after injection molding. If it is used directly, it will inevitably affect the quality of the next injection molding. If it is paused for cleaning each time, the efficiency of injection molding will be affected.

[0005] Therefore, it is necessary to provide a syringe elastic rubber piston molding device and molding method to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a syringe elastic rubber piston molding device and molding method to solve the problems of the defects of the prior art mentioned in the above background technology.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a syringe elastic rubber piston molding device, including a support cabinet, the support cabinet is equipped with an injection molding machine for injection molding, and also includes: A sliding bracket is arranged on the top of the support cabinet, and two sets of mold assemblies for rubber piston molding are arranged on one side of the sliding bracket; Two lifting seats, the two lifting seats are respectively arranged at the two ends of the sliding bracket, and the two lifting seats are provided with lifting components on the outside, the bottom of the lifting seats is provided with a cleaning component, and the outside of the sliding bracket is provided with a linear drive module for driving the two mold assemblies to switch injection molding. When a group of mold assemblies moves below the cleaning component, the cleaning component descends to clean the mold assembly; The pushing mechanism is arranged at the bottom of the cleaning component, and when the cleaning component descends, the pushing mechanism pushes the piston out of the mold.

[0008] As a further solution of the present invention: the mold assembly comprises: A connecting plate, the connecting plate is fixedly connected to the sliding bracket, one side of the connecting plate is fixedly connected to a first mold plate, and a first molding groove is provided on the outer side of the first mold plate; A second mold plate, the second mold plate is arranged on one side of the first mold plate, and a second molding groove is provided on a side of the second mold plate opposite to the first mold plate, and an injection port is provided on a side of the second mold plate away from the first mold plate; The first electric push rod is fixedly connected to one side of the connecting plate, and the telescopic end of the connecting plate is fixedly connected to the second mold plate, and is used to drive the first mold plate and the second mold plate to close the mold.

[0009] As a further solution of the present invention: the cleaning assembly includes two fixed plates, the two fixed plates are fixedly connected and fixedly connected to the lifting seat, and a plurality of cleaning pieces are arranged on one side of the two fixed plates, and the cleaning pieces are used to clean the first molding groove and the second molding groove.

[0010] As a further solution of the present invention: the cleaning member comprises: A movable plate, the movable plate is arranged on one side of the fixed plate, and an annular brush is fixedly connected to the outer side of the movable plate; The telescopic rod, both ends of which are rotatably connected to the movable plate and the fixed plate respectively, and a first spring is sleeved outside the first spring, and both ends of the first spring are fixedly connected to both ends of the telescopic rod respectively, for pulling the telescopic rod to retract and reset; A magnetic ring, which is fixedly connected to the bottom of the movable plate, and an electromagnet is fixedly connected to the outer side of the fixed plate. When the electromagnet is energized, it magnetically repels the magnetic ring and is used to push the movable plate to extend to the inside of the first forming groove and the second forming groove; The rotating member is arranged between the moving disk and the fixed plate. When the moving disk moves, the moving disk is driven to rotate by the rotating member.

[0011] As a further solution of the present invention: the rotating member comprises: A rotating cylinder, the rotating cylinder is fixedly connected to the bottom of the moving plate, and the inner wall of the rotating cylinder is fixedly connected to a limiting axis; The fixed cylinder is arranged on the inner side of the rotating cylinder, and a spiral groove is opened on the outer side of the fixed cylinder. The limiting shaft extends to the inside of the fixed cylinder through the spiral groove and is slidably connected with the fixed cylinder. When the moving disk drives the rotating cylinder to rise, the rotating cylinder is spirally raised through the spiral groove.

[0012] As a further solution of the present invention: the cleaning component also includes: A mounting ring, the mounting ring is fixedly connected to the outer side of the rotating cylinder; An airbag, the airbag is arranged on the inner side of the mounting ring and is partially fixedly connected to the inner side of the mounting ring; A rotating ring, the rotating ring is rotatably connected to the outside of the fixed plate, and a plurality of cleaning belts are arranged on the outside of the rotating ring, the cleaning belts pass through the rotating ring and are fixedly connected to the mounting ring through the airbag, one end of the plurality of cleaning belts is fixedly connected to a fixed head, a second spring is fixedly connected between the fixed head and the rotating ring, and the second spring is sleeved on the outside of the cleaning belt; A connecting ring, a rotating plate is fixedly connected to the outside of the fixed plate, and the top of the rotating plate is rotatably connected to the rotating plate, and a connecting pipe is fixedly connected between the rotating plate and the airbag, which is used to inflate the airbag, and when the airbag is inflated, the cleaning belt is attached to the inner wall of the first molding groove and the second molding groove; An air pump is fixedly connected to the top of the lifting seat, and an air outlet of the air pump is connected to an air delivery pipe, which passes through a plurality of connecting rings in sequence and is connected to the connecting rings.

[0013] As a further solution of the present invention: the pushing mechanism comprises: A plurality of fixed frames, each of which is fixedly connected to the bottom of the fixed plate, and each of which is fixedly connected to a limit rod inside; A sliding plate is arranged inside the fixed frame, a limiting rod passes through the sliding plate and is slidably connected to the sliding plate, and a push ring is fixedly connected to one end of the sliding plate, a return spring is sleeved on the outer side of the limiting rod, and two ends of the return spring are respectively fixedly connected to the sliding plate and the top end inside the fixed frame; The knocking pieces are arranged on both sides of the push ring. When the push ring contacts the rubber piston, the push ring moves to drive the knocking pieces to knock the forming mold repeatedly.

[0014] As a further solution of the present invention: the striking member comprises: A rack, the rack is fixedly connected to the outside of the fixed frame, and the outside of the rack is meshed with a gear, and the gear is rotatably connected to the sliding plate; A rotating disk, the rotating disk is fixedly connected to one side of the gear, and the rotating disk eccentrically rotates with a first pull plate, one end of the first pull plate is rotatably connected to a second pull plate, and one end of the second pull plate is fixedly connected to a knocking head; The limiting plate is fixedly connected with the sliding plate, and the second pulling plate passes through the limiting plate and is slidably connected with the limiting plate.

[0015] As a further solution of the present invention: the lifting assembly includes a lifting bracket fixedly connected to the top of the supporting cabinet, the lifting seat is slidably connected to the outside of the lifting bracket, and a second electric push rod is fixedly connected to the top of the lifting bracket, and the telescopic end of the second electric push rod is fixedly connected to the lifting seat.

[0016] A method for molding an elastic rubber piston of a syringe, comprising the following steps: Step 1: Use the injection molding machine to perform injection molding on one of the mold components. After the injection molding is completed, the linear module drives the sliding bracket to move and switch the mold component that has been completed by injection molding to the bottom of one of the lifting brackets; Step 2: The injection molding machine re-injects the new mold assembly, separates the mold assembly after the injection molding, and drives the lifting seat to descend by starting the lifting assembly; Step 3: Push out the piston inside the mold assembly through the pushing mechanism, and clean the inside of the mold assembly through the cleaning assembly; Step 4: After cleaning, the linear module moves the cleaned mold assembly to one side of the injection molding machine for injection molding.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Start the lifting assembly to drive the lifting seat down; push the piston inside the mold assembly through the pushing mechanism, and clean the inside of the mold assembly through the cleaning assembly. After cleaning, the linear module moves the cleaned mold assembly to one side of the injection molding machine for injection molding, so as to perform alternating injection molding, and the mold assembly can be cleaned alternately to improve the efficiency of injection molding.

[0018] 2. By cutting off the power to the electromagnet, the first spring pulls the telescopic rod to reset, and then the telescopic rod pulls the movable plate to reset, so that the cleaning materials inside the molding groove are scraped out, thereby ensuring the cleaning of the first mold plate and the second mold plate. The molding groove is automatically cleaned after each injection molding is completed, which improves the quality of injection molding without affecting the injection molding efficiency.

[0019] 3. Punch into the airbag through the connecting tube. At this time, the airbag expands and extends out of the mounting ring, and pushes the cleaning belt on the outside of the airbag to fit the inside of the molding groove. When the rotating cylinder rotates and drives the mounting ring to rotate, the cleaning belt that fits the molding groove rotates together, and then the molding groove is fully cleaned, thereby improving the cleaning effect and dealing with dead corners that are difficult to clean with an annular brush.

[0020] 4. The rotating disk drives the eccentrically rotating first pull plate to rotate, and the first pull plate drives the rotationally connected second pull plate, and then drives the fixedly connected knocking head. Repeatedly knock the first mold plate or the second mold plate where the piston is stuck, and separate the piston from the first mold plate and the second mold plate, thereby avoiding manual removal, improving the overall injection molding efficiency, and accurately separating the piston from the mold assembly to avoid large-scale knocking on the mold assembly, causing damage to the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the lifting assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the mold assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the lifting seat of the present invention; Figure 5 It is a schematic diagram of the structure of the fixing plate of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the rotating cylinder of the present invention; Figure 7 It is a schematic diagram of the separation structure of the rotating cylinder and the fixed cylinder of the present invention; Figure 8 It is a schematic diagram of the mounting ring structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the driving mechanism of the present invention; Fig.10 The present invention Fig.10 Schematic diagram of the enlarged structure of part A.

[0023] In the figure: 1, support cabinet; 2, injection molding machine; 3, sliding bracket; 301, connecting plate; 302, first mold plate; 303, second mold plate; 304, first electric push rod; 305, injection port; 4, lifting bracket; 401, second electric push rod; 5, lifting seat; 6, fixed plate; 601, fixed cylinder; 602, rotating cylinder; 603, spiral groove; 604, moving plate; 605, annular brush; 606, limit shaft; 607, magnetic ring; 608, electromagnet; 609, telescopic rod; 610, The first spring; 7, mounting ring; 701, air bag; 702, rotating ring; 703, cleaning belt; 704, second spring; 705, fixed head; 8, air pump; 800, air pipe; 801, connecting ring; 802, rotating plate; 803, connecting pipe; 9, fixed frame; 901, limiting rod; 902, sliding plate; 903, pushing ring; 904, rack; 905, gear; 906, rotating disk; 907, first pull plate; 908, second pull plate; 909, limiting plate; 910, knocking head. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] like Figures 1 to 10 As shown, a syringe elastic rubber piston molding device and molding method include the following embodiments: Embodiment 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a syringe elastic rubber piston molding device includes a support cabinet 1, the support cabinet 1 is equipped with an injection molding machine 2 for injection molding, and also includes: A sliding bracket 3 is arranged on the top of the supporting cabinet 1, and two sets of mold assemblies for rubber piston molding are arranged on one side of the sliding bracket 3; Two lifting seats 5, the two lifting seats 5 are respectively arranged at both ends of the sliding bracket 3, and the outer sides of the two lifting seats 5 are provided with lifting components, the bottom of the lifting seats 5 is provided with a cleaning component, and the outer side of the sliding bracket 3 is provided with a linear drive module for driving the two mold assemblies to switch injection molding. When one set of mold assemblies moves below the cleaning component, the cleaning component descends to clean the mold assemblies; The pushing mechanism is arranged at the bottom of the cleaning component, and when the cleaning component descends, the pushing mechanism pushes the piston out of the mold.

[0027] During specific implementation, one of the mold assemblies is injection molded by the injection molding machine 2. After the injection molding is completed, the linear module drives the sliding bracket 3 to move. The linear module can use an electric slide rail, which is not specifically limited here. The mold assembly that has been injection molded is switched to the bottom of one of the lifting brackets 4; the injection molding machine 2 injects the new mold assembly again, separates the mold assembly that has been injected, and drives the lifting seat 5 to descend by starting the lifting assembly; the piston inside the mold assembly is pushed out by the pushing mechanism, and the inside of the mold assembly is cleaned by the cleaning assembly. After the cleaning is completed, the linear module moves the cleaned mold assembly to one side of the injection molding machine 2 for injection molding, thereby performing alternating injection molding, and the mold assemblies can be cleaned alternately to improve the efficiency of injection molding.

[0028] In this embodiment, Figure 3 As shown, the mold assembly includes: A connecting plate 301, the connecting plate 301 is fixedly connected to the sliding bracket 3, a first mold plate 302 is fixedly connected to one side of the connecting plate 301, and a first molding groove is opened on the outer side of the first mold plate 302; A second mold plate 303, the second mold plate 303 is disposed on one side of the first mold plate 302, and a second molding groove is provided on a side of the second mold plate 303 opposite to the first mold plate 302, and an injection port 305 is provided on a side of the second mold plate 303 away from the first mold plate 302; The first electric push rod 304 is fixedly connected to one side of the connecting plate 301, and the telescopic end of the connecting plate 301 is fixedly connected to the second mold plate 303, so as to drive the first mold plate 302 and the second mold plate 303 to close the mold.

[0029] In specific implementation, two connecting plates 301 are arranged in parallel and fixedly connected to the sliding bracket 3. When the first electric push rod 304 is started, the telescopic end of the first electric push rod 304 is telescopic to drive the second mold plate 303 to overlap with the first mold plate 302, so that the first molding groove and the second molding groove are docked. The injection molding machine 2 performs injection molding through the injection port 305 on the second mold plate 303, and injects the rubber liquid into the first molding groove and the second molding groove. When the injection molding is completed, the second mold plate 303 is pushed to move by the first electric push rod 304 to separate the first mold plate 302 and the second mold plate 303, so that the piston falls, and corresponding collection grooves are respectively set on both sides of the top of the support cabinet 1 for collection.

[0030] Embodiment 2: Figure 6 , Figure 7 and Figure 8As shown, the lifting assembly includes a lifting bracket 4 fixedly connected to the top of the supporting cabinet 1, a lifting seat 5 is slidably connected to the outside of the lifting bracket 4, and a second electric push rod 401 is fixedly connected to the top of the inside of the lifting bracket 4, and the telescopic end of the second electric push rod 401 is fixedly connected to the lifting seat 5.

[0031] The cleaning assembly includes two fixed plates 6, which are fixedly connected and fixedly connected to the lifting seat 5. A plurality of cleaning pieces are arranged on one side of the two fixed plates 6, and the cleaning pieces are used to clean the first molding groove and the second molding groove.

[0032] Cleaning parts include: A movable plate 604, the movable plate 604 is arranged on one side of the fixed plate 6, and an annular brush 605 is fixedly connected to the outer side of the movable plate 604; The telescopic rod 609, both ends of which are rotatably connected to the movable plate 604 and the fixed plate 6, and the first spring 610 is sleeved on the outer side of the first spring 610, and both ends of the first spring 610 are fixedly connected to both ends of the telescopic rod 609, respectively, for pulling the telescopic rod 609 to retract and reset; A magnetic ring 607, which is fixedly connected to the bottom of the movable plate 604, and an electromagnet 608 is fixedly connected to the outer side of the fixed plate 6. When the electromagnet 608 is energized, it magnetically repels the magnetic ring 607, and is used to push the movable plate 604 to extend to the inside of the first forming groove and the second forming groove; The rotating member is disposed between the moving disk 604 and the fixed plate 6. When the moving disk 604 moves, the moving disk 604 is driven to rotate by the rotating member.

[0033] In specific implementation, after the first mold plate 302 and the second mold plate 303 are separated, the lifting assembly drives the lifting seat 5 to descend, and the lifting seat 5 drives the two fixed plates 6 to move between the first mold plate 302 and the second mold plate 303, and the cleaning pieces on the two fixed plates 6 are respectively aligned with the first molding groove and the second molding groove, and the electromagnet 608 on the fixed plate 6 is energized. After the electromagnet 608 is energized, a repulsive force is generated on the magnetic ring 607 of the movable disk 604, thereby pushing the movable disk 604 into the corresponding molding groove, and the inside of the molding groove is cleaned by the annular brush 605 on the outside of the movable disk 604 to avoid adhesion inside the groove and affect the subsequent injection molding.

[0034] In this embodiment: Figure 7 and Figure 8 As shown, the rotating member includes: The rotating cylinder 602 is fixedly connected to the bottom of the moving plate 604, and the inner wall of the rotating cylinder 602 is fixedly connected to the limiting axis 606; The fixed cylinder 601 is arranged on the inner side of the rotating cylinder 602, and a spiral groove 603 is opened on the outer side of the fixed cylinder 601. The limiting shaft 606 extends to the inside of the fixed cylinder 601 through the spiral groove 603 and is slidably connected with the fixed cylinder 601. When the movable disk 604 drives the rotating cylinder 602 to rise, the rotating cylinder 602 is spirally raised through the spiral groove 603.

[0035] During specific implementation, in order to improve the cleaning of the inside of the molding groove by the annular brush 605, a limiting shaft 606 is set on the rotating cylinder 602 on the side of the movable disk 604 relative to the fixed plate 6. When the movable disk 604 moves, since the limiting shaft 606 is in the spiral groove 603 opened on the outside of the fixed cylinder 601, the rotating cylinder 602 moves spirally along the spiral groove 603, thereby driving the movable disk 604 to rotate, so that the annular brush 605 rotates and cleans the molding groove. When the annular brush 605 extends to the innermost part of the molding groove, the electromagnet 608 is powered off. At this time, the first spring 610 pulls the telescopic rod 609 to reset, and the telescopic rod 609 pulls the movable disk 604 to reset, thereby scraping out the cleaning materials inside the molding groove, thereby ensuring the cleaning of the first mold plate 302 and the second mold plate 303. The molding groove is automatically cleaned after each injection molding is completed, thereby improving the quality of injection molding and not affecting the injection molding efficiency.

[0036] Embodiment 3: Figure 4 and Figure 8 As shown, the cleaning component also includes: A mounting ring 7, the mounting ring 7 is fixedly connected to the outer side of the rotating cylinder 602; The airbag 701 is arranged on the inner side of the mounting ring 7 and is partially fixedly connected to the inner side of the mounting ring 7; A rotating ring 702, the rotating ring 702 is rotatably connected to the outside of the fixed plate 6, and a plurality of cleaning belts 703 are arranged on the outside of the rotating ring 702, the cleaning belts 703 pass through the rotating ring 702 and are fixedly connected to the mounting ring 7 through the airbag 701, one end of each of the plurality of cleaning belts 703 is fixedly connected to a fixed head 705, a second spring 704 is fixedly connected between the fixed head 705 and the rotating ring 702, and the second spring 704 is sleeved on the outside of the cleaning belt 703; The connecting ring 801 and the rotating plate 802 are fixedly connected to the outside of the fixed plate 6, and the rotating plate 802 is rotatably connected to the top of the rotating plate 802. A connecting pipe 803 is fixedly connected between the rotating plate 802 and the airbag 701, which is used to inflate the airbag 701. When the airbag 701 is inflated, the cleaning belt 703 is attached to the inner wall of the first molding groove and the second molding groove; The air pump 8 is fixedly connected to the top of the lifting seat 5 , and the air outlet of the air pump 8 is connected to the air pipe 800 . The air pipe 800 passes through a plurality of connecting rings 801 in sequence and is connected to the connecting rings 801 .

[0037] During specific implementation, due to the protruding edge of the rubber piston of the syringe, when the annular brush 605 extends to the inside of the molding groove, there is a position that cannot be contacted, and it cannot completely fit with the inside of the molding groove. Therefore, in this solution, the mounting ring 7 is fixed on the outside of the rotating cylinder 602, and gas is injected into the air pipe 800 through the air pump 8, so that the gas enters the inside of the connecting ring 801 and rushes into the inside of the airbag 701 through the connecting pipe 803. At this time, the airbag 701 expands, and the airbag 701 expands and extends out of the mounting ring 7, and pushes the cleaning belt 703 on the outside of the airbag 701 to fit with the inside of the molding groove. When the rotating cylinder 602 rotates and drives the mounting ring 7 to rotate, the cleaning belt 703 that fits with the molding groove rotates together, and then the molding groove is fully cleaned, thereby improving the cleaning effect and processing the dead corners that are difficult to clean with the annular brush 605.

[0038] Embodiment 4: As 9 and Fig.10 As shown, the driving agencies include: A plurality of fixed frames 9, wherein the plurality of fixed frames 9 are all fixedly connected to the bottom of the fixed plate 6, and the interiors of the plurality of fixed frames 9 are all fixedly connected to limit rods 901; A sliding plate 902 is arranged inside the fixed frame 9, a limiting rod 901 penetrates the sliding plate 902 and is slidably connected to the sliding plate 902, and a push ring 903 is fixedly connected to one end of the sliding plate 902, a return spring is sleeved on the outer side of the limiting rod 901, and the two ends of the return spring are respectively fixedly connected to the sliding plate 902 and the top of the fixed frame 9; The knocking pieces are arranged on both sides of the push ring 903. When the push ring 903 contacts the rubber piston, the push ring 903 moves to drive the knocking pieces to knock against the molding mold repeatedly.

[0039] The striking parts include: A rack 904, the rack 904 is fixedly connected to the outside of the fixed frame 9, and the outside of the rack 904 is meshed with a gear 905, and the gear 905 is rotatably connected to the sliding plate 902; A rotating disk 906, the rotating disk 906 is fixedly connected to one side of the gear 905, and the rotating disk 906 eccentrically rotates with a first pull plate 907, one end of the first pull plate 907 is rotatably connected to a second pull plate 908, and one end of the second pull plate 908 is fixedly connected to a knocking head 910; The limiting plate 909 is fixedly connected to the sliding plate 902 , and the second pulling plate 908 passes through the limiting plate 909 and is slidably connected to the limiting plate 909 .

[0040] In specific implementation, when the first mold plate 302 and the second mold plate 303 are separated, there will inevitably be a rubber piston stuck in the first molding groove or the second molding groove. Therefore, when the lifting seat 5 descends, the pushing ring 903 in the pushing mechanism first contacts with the piston. During the contact process of the pushing ring 903, if the piston cannot be pushed out of the molding groove, the pushing ring 903 rises relative to the fixed frame 9. At this time, the gears 905 on both sides of the sliding plate 902 are meshed and connected with the rack 904, and then the gear 905 drives the fixedly connected rotating disk 906 to rotate, and the rotating disk 906 drives the eccentrically rotating first pull plate 907 to rotate, and the first pull plate 907 drives the rotatingly connected second pull plate 908, and then drives the fixedly connected knocking head. 910 repeatedly knocks on the position where the piston is stuck on the first mold plate 302 or the second mold plate 303 to separate the piston from the first mold plate 302 and the second mold plate 303, thereby avoiding manual removal, improving the overall injection molding efficiency, and accurately separating the piston from the mold assembly to avoid large-scale knocking on the mold assembly to cause damage to the mold.

[0041] A method for molding an elastic rubber piston of a syringe, comprising the following steps: Step 1: Inject one of the mold assemblies by using the injection molding machine 2. After the injection molding is completed, the linear module drives the sliding bracket 3 to move, and switches the mold assembly after injection molding to the bottom of one of the lifting brackets 4; Step 2: The injection molding machine 2 performs another injection on the new mold assembly, separates the mold assembly after the injection molding, and drives the lifting seat 5 to descend by starting the lifting assembly; Step 3: Push out the piston inside the mold assembly through the pushing mechanism, and clean the inside of the mold assembly through the cleaning assembly; Step 4: After cleaning is completed, the linear module moves the cleaned mold assembly to one side of the injection molding machine 2 for injection molding.

[0042] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A syringe elastic rubber piston molding device, comprising a support cabinet (1), the support cabinet (1) being equipped with an injection molding machine (2) for injection molding, characterized in that: Also includes: A sliding bracket (3) is arranged on the top of the support cabinet (1), and two sets of mold assemblies for molding the rubber piston are arranged on one side of the sliding bracket (3); Two lifting seats (5), the two lifting seats (5) are respectively arranged at both ends of the sliding bracket (3), and lifting components are arranged outside the two lifting seats (5), a cleaning component is arranged at the bottom of the lifting seats (5), and a linear drive module is arranged outside the sliding bracket (3) for driving the two mold assemblies to switch injection molding, when one set of mold assemblies moves to below the cleaning component, the cleaning component descends to clean the mold assemblies; The pushing mechanism is arranged at the bottom of the cleaning component, and when the cleaning component descends, the pushing mechanism pushes the piston out of the mold.

2. A syringe elastic rubber piston molding device according to claim 1, characterized in that: The mold assembly comprises: A connecting plate (301), the connecting plate (301) being fixedly connected to the sliding bracket (3), a first mold plate (302) being fixedly connected to one side of the connecting plate (301), and a first molding groove being formed on the outer side of the first mold plate (302); A second mold plate (303), the second mold plate (303) being arranged on one side of the first mold plate (302), and a second molding groove being provided on a side of the second mold plate (303) opposite to the first mold plate (302), and an injection port (305) being provided on a side of the second mold plate (303) away from the first mold plate (302); The first electric push rod (304) is fixedly connected to one side of the connecting plate (301), and the telescopic end of the connecting plate (301) is fixedly connected to the second mold plate (303), and is used to drive the first mold plate (302) and the second mold plate (303) to close the mold.

3. The syringe elastic rubber piston molding device according to claim 1, characterized in that: The cleaning assembly comprises two fixed plates (6), the two fixed plates (6) are fixedly connected and are fixedly connected to the lifting seat (5), and a plurality of cleaning pieces are arranged on one side of the two fixed plates (6), and the cleaning pieces are used to clean the first molding groove and the second molding groove.

4. A syringe elastic rubber piston molding device according to claim 3, characterized in that: The cleaning member comprises: A movable plate (604), the movable plate (604) being arranged on one side of the fixed plate (6), and an annular brush (605) being fixedly connected to the outer side of the movable plate (604); A telescopic rod (609), two ends of the telescopic rod (609) are rotatably connected to the movable plate (604) and the fixed plate (6), and a first spring (610) is sleeved outside the first spring (610), and two ends of the first spring (610) are fixedly connected to two ends of the telescopic rod (609) for pulling the telescopic rod (609) to retract and reset; A magnetic ring (607), the magnetic ring (607) is fixedly connected to the bottom of the movable plate (604), and an electromagnet (608) is fixedly connected to the outer side of the fixed plate (6), and the electromagnet (608) magnetically repels the magnetic ring (607) when energized, so as to push the movable plate (604) to extend to the inside of the first molding groove and the second molding groove; The rotating member is arranged between the movable disk (604) and the fixed plate (6); when the movable disk (604) moves, the movable disk (604) is driven to rotate by the rotating member.

5. The syringe elastic rubber piston molding device according to claim 4, characterized in that: The rotating member comprises: A rotating cylinder (602), the rotating cylinder (602) is fixedly connected to the bottom of the moving plate (604), and the inner wall of the rotating cylinder (602) is fixedly connected to a limiting axis (606); The fixed cylinder (601) is arranged inside the rotating cylinder (602), and a spiral groove (603) is provided on the outside of the fixed cylinder (601). The limiting shaft (606) extends into the interior of the fixed cylinder (601) through the spiral groove (603) and is slidably connected to the fixed cylinder (601). When the movable plate (604) drives the rotating cylinder (602) to rise, the spiral groove (603) causes the rotating cylinder (602) to rise in a spiral manner.

6. The syringe elastic rubber piston molding device according to claim 5, characterized in that: The cleaning component also includes: A mounting ring (7), the mounting ring (7) being fixedly connected to the outside of the rotating cylinder (602); An airbag (701), the airbag (701) is arranged on the inner side of the mounting ring (7), and a portion of the airbag is fixedly connected to the inner side of the mounting ring (7); A rotating ring (702), the rotating ring (702) is rotatably connected to the outside of the fixed plate (6), and a plurality of cleaning belts (703) are arranged on the outside of the rotating ring (702), the cleaning belts (703) pass through the rotating ring (702) and are fixedly connected to the mounting ring (7) through the airbag (701), one end of each of the plurality of cleaning belts (703) is fixedly connected to a fixing head (705), a second spring (704) is fixedly connected between the fixing head (705) and the rotating ring (702), and the second spring (704) is sleeved on the outside of the cleaning belt (703); A connecting ring (801), a rotating plate (802) is fixedly connected to the outside of the fixed plate (6), and the top of the rotating plate (802) is rotatably connected to the rotating plate (802), and a connecting pipe (803) is fixedly connected between the rotating plate (802) and the airbag (701) for inflating the airbag (701), so that the cleaning belt (703) is attached to the inner wall of the first molding groove and the second molding groove when the airbag (701) is inflated; An air pump (8) is fixedly connected to the top of the lifting seat (5); an air outlet end of the air pump (8) is connected to an air delivery pipe (800); and the air delivery pipe (800) passes through a plurality of connecting rings (801) in sequence and is connected to the connecting rings (801).

7. A syringe elastic rubber piston molding device according to claim 6, characterized in that: The driving mechanism comprises: A plurality of fixed frames (9), wherein the plurality of fixed frames (9) are all fixedly connected to the bottom of the fixed plate (6), and the interiors of the plurality of fixed frames (9) are all fixedly connected to limit rods (901); A sliding plate (902) is arranged inside the fixed frame (9), a limiting rod (901) passes through the sliding plate (902) and is slidably connected to the sliding plate (902), and a pushing ring (903) is fixedly connected to one end of the sliding plate (902), a return spring is sleeved on the outer side of the limiting rod (901), and two ends of the return spring are respectively fixedly connected to the sliding plate (902) and the top end inside the fixed frame (9); The knocking pieces are arranged on both sides of the push ring (903); when the push ring (903) contacts the rubber piston, the push ring (903) moves to drive the knocking pieces to knock the molding die repeatedly.

8. The syringe elastic rubber piston molding device according to claim 7, characterized in that: The striking member comprises: A rack (904), the rack (904) is fixedly connected to the outside of the fixed frame (9), and the outside of the rack (904) is meshingly connected with a gear (905), and the gear (905) is rotationally connected to the sliding plate (902); A rotating disk (906), the rotating disk (906) is fixedly connected to one side of the gear (905), and the rotating disk (906) is eccentrically rotated with a first pull plate (907), one end of the first pull plate (907) is rotatably connected to a second pull plate (908), and one end of the second pull plate (908) is fixedly connected to a striking head (910); The limiting plate (909) is fixedly connected to the sliding plate (902); the second pulling plate (908) passes through the limiting plate (909) and is slidably connected to the limiting plate (909).

9. The syringe elastic rubber piston molding device according to claim 1, characterized in that: The lifting assembly comprises a lifting bracket (4) fixedly connected to the top of the support cabinet (1), a lifting seat (5) slidably connected to the outside of the lifting bracket (4), and a second electric push rod (401) is fixedly connected to the top of the inside of the lifting bracket (4), and the telescopic end of the second electric push rod (401) is fixedly connected to the lifting seat (5).

10. A method for molding an elastic rubber piston for a syringe, applicable to an elastic rubber piston molding device for a syringe as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Use the injection molding machine (2) to perform injection molding on one of the mold assemblies. After the injection molding is completed, the linear module drives the sliding bracket (3) to move, and switches the mold assembly after injection molding to the bottom of one of the lifting brackets (4); Step 2: The injection molding machine (2) injects the new mold assembly again, separates the mold assembly after the injection molding, and drives the lifting seat (5) to descend by starting the lifting assembly; Step 3: Push out the piston inside the mold assembly through the pushing mechanism, and clean the inside of the mold assembly through the cleaning assembly; Step 4: After cleaning is completed, the linear module moves the cleaned mold assembly to one side of the injection molding machine (2) for injection molding.

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