Pre-filled syringe barrel forming machine and forming method

Abstract

The application discloses a pre-filled syringe barrel forming machine and a forming method, and belongs to the technical field of injection molding machines. The pre-filled syringe barrel forming machine comprises a feeding machine, a mechanical arm, a head forming device, a tail forming device and a discharging machine. The feeding machine and the mechanical arm are used for feeding the preform rod. The head forming device is provided with a plurality of clamping pieces. The clamping pieces receive the preform rod and drive the preform rod to rotate. The plurality of clamping pieces can revolve in the circumferential direction to take the preform rod to different stations for head forming. The tail forming device is provided with a plurality of clamping pieces. The clamping pieces receive the semi-finished product and drive the semi-finished product to rotate. The plurality of clamping pieces can revolve in the circumferential direction to take the semi-finished product to different stations for tail forming. The discharging machine is used for discharging the finished product. The revolving path of the clamping piece and the revolving path of the clamping piece have a tangent point. The axis of the clamping piece and the clamping piece at the tangent point coincide. The preform rod can be formed into a pre-filled syringe barrel. The forming process is automated. The forming is stable and reliable. The processing efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of syringe technology, specifically relating to a pre-filled syringe syringe forming machine and forming method. Background Technology

[0002] Chinese patent CN201702900U discloses a syringe barrel molding die. This solution discloses a technical solution for producing syringe barrels by injection molding. However, the process of loading and unloading, mold preheating, injection molding, heat preservation and pressure holding, and cooling in this solution takes a long time and has low molding efficiency.

[0003] Currently, borosilicate glass tube preforms have been developed for use in the manufacture of pre-filled syringes. However, the preform molding process requires flame heating, which can cause significant harm to the human body. There is an urgent need to provide a device that can automatically mold borosilicate glass tube preforms into pre-filled syringe barrels. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, this invention proposes a pre-filled syringe syringe forming machine and forming method. The pre-filled syringe syringe forming machine has the advantages of being able to form preforms into pre-filled syringe syringes, and the forming process is automated, stable and reliable during forming, and has high processing efficiency.

[0006] According to an embodiment of the present invention, a pre-filled syringe syringe forming machine includes: a feeding machine for providing a preform; a robotic arm for clamping and rotating the preform from the feeding machine into a vertical position for supplying; a head forming device having multiple gripping members evenly arranged in a circumferential direction, the gripping members receiving the preform and rotating it, the multiple gripping members being capable of revolving in a circumferential direction to carry the preform to different stations for head forming, thereby producing a semi-finished product; and a tail forming device. The tail forming device has multiple clamping members located on one side of the head forming device. These clamping members are evenly arranged circumferentially and are used to receive semi-finished products and drive them to rotate. The clamping members can revolve circumferentially to carry the semi-finished products to different workstations for tail forming, thereby producing finished products. A feeding machine is located on one side of the tail forming device to connect the finished products outward. The revolving paths of the clamping members and the revolving paths of the gripping members have a tangent point, and the axes of the gripping members and the clamping members coincide at the tangent point.

[0007] The beneficial effects of this invention are that it has a simple and compact structure. The preform is fed using a feeding machine and a robotic arm. The head forming device drives the preform to rotate while simultaneously revolving, allowing the lower end of the preform to undergo multiple forming processes during movement, thus forming a semi-finished product. Then, the tail forming device drives the semi-finished product to rotate while simultaneously revolving, allowing the upper end of the semi-finished product to undergo multiple forming processes again during movement, forming a finished product. Finally, the unloading machine unloads the preform. This invention enables automatic and continuous processing of the preform's feeding, head forming, tail forming, and unloading. Simultaneously, the forming process is distributed into two circular processing areas that circulate, resulting in a compact structure, small footprint, and multiple stations working simultaneously, leading to high forming efficiency.

[0008] According to one embodiment of the present invention, the head forming device further includes: a plurality of flame heating devices, a first forming device, a second forming device, a third forming device, and a fourth forming device. The first forming device, the second forming device, the third forming device, and the fourth forming device are arranged at intervals along the revolution direction of the clamping member to sequentially form the lower end of the preform four times. The plurality of flame heating devices are arranged in a circumferential direction, and the flame end of the flame heating device is located on the movement path of the preform to heat the lower end of the preform.

[0009] According to one embodiment of the present invention, a length-fixing mechanism, a breaking mechanism, a tail material box, a first detection camera, and a cutting device are further provided between the first forming device and the fourth forming device. The length-fixing mechanism is located below the movement path of the preform and is used to determine the length of the lower end of the preform extending outward. The tail material box is located below the movement path of the preform and is used to receive tail material. The breaking mechanism, the first detection camera, and the cutting device are located on one side of the movement path of the preform. The first detection camera is used for visual inspection of the head forming effect, the cutting device is used to cut the preform, and the breaking mechanism is used to knock off the semi-finished product.

[0010] According to one embodiment of the present invention, a plurality of clamping components are mounted on a head forming tray. Each clamping component includes a guide tube, a timing pulley, a bushing, a first spring, a lifting adjuster, a flange ring, a slider, and sliding rods. The timing pulley is sleeved on the guide tube, the bushing is rotatably sleeved on the guide tube, the slider is mounted on the lower end of the guide tube, the flange ring is located between the first spring and the slider, and a plurality of sliding rods are movably mounted on the flange ring. The sliding rods are slidably connected to the slider. The first spring is located between the bushing and the flange ring, and the lifting adjuster drives the flange ring to move up and down, so that the plurality of sliding rods clamp or release the preform.

[0011] According to one embodiment of the present invention, the first forming device includes a lifting plate, a forming needle assembly, a first horizontal adjustment assembly, a second horizontal adjustment assembly, and a forming wheel assembly. The first horizontal adjustment assembly is mounted on the lifting plate, the second horizontal adjustment assembly is mounted on the first horizontal adjustment assembly, and the forming wheel assembly is mounted on the second horizontal adjustment assembly. The adjustment direction of the second horizontal adjustment assembly is perpendicular to that of the first horizontal adjustment assembly. The forming needle assembly is located in the middle of the forming wheel assembly. The forming wheel assembly has two forming wheels that are close together to extrude and form the lower end of the preform.

[0012] According to one embodiment of the present invention, the tail forming device further includes a plurality of flame heating devices, a flanging mechanism, a spinning mechanism, a trimming mechanism, and a flattening mechanism. The flanging mechanism, spinning mechanism, trimming mechanism, and flattening mechanism are arranged at intervals along the revolution direction of the clamping member, and are used to sequentially perform flanging, spinning forming, or flanging, spinning, trimming, and flattening forming on the upper end of the semi-finished product. The plurality of flame heating devices are arranged along the circumferential direction, and the flame end of the flame heating device is located on the movement path of the semi-finished product, and is used to heat the upper end of the semi-finished product.

[0013] According to one embodiment of the present invention, a plurality of clamping members are mounted on a tail forming tray, and two synchronous belt drive mechanisms are mounted on the tail forming tray. One synchronous belt drive mechanism drives the clamping members at corresponding positions of the flanging mechanism and the spinning mechanism to rotate, and the other synchronous belt drive mechanism drives the clamping members at corresponding positions of the flattening mechanism to rotate.

[0014] According to one embodiment of the present invention, the unloading machine includes a horizontal rotation mechanism, a translation mechanism, a chain conveyor, and a cooling fan. The horizontal rotation mechanism is used to remove the finished product from the clamping member and rotate it to a horizontal state. The translation mechanism transports the finished product to the chain conveyor. The cooling fan is installed on the chain conveyor to dissipate heat from the finished product.

[0015] According to one embodiment of the present invention, a displacement sensor, a lifting device, a waste discharge mechanism, and a second detection camera are further provided at the end of the chain. The displacement sensor is used to detect the length of the finished product, the lifting device is used to lift the finished product, and the second detection camera is used to detect the tail forming effect. The waste discharge mechanism is used to reject finished products that fail the detection.

[0016] According to an embodiment of the present invention, a molding method is performed using a pre-filled syringe syringe molding machine as described above, comprising the following steps: Step 1: The feeding machine and the robotic arm work together to insert the preform into multiple clamping parts in sequence; Step 2: The clamping parts rotate on their own axis and revolve around the sun, thereby moving the lower end of the preform to the molding station for multiple extrusion moldings, and performing flame heating treatment before each molding; Step 3: After the head is molded, it is inspected and cut off to become a semi-finished product, which is received by the clamping parts; Step 4: According to the processing requirements, the semi-finished product is moved to the molding station, and the upper end of the semi-finished product is sequentially subjected to flanging, spinning molding, or flanging, spinning molding, trimming, and flattening molding; Step 5: After the tail is molded, a finished product is formed, which is conveyed out by the unloading machine and inspected and screened.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of the pre-filled syringe syringe forming machine according to the present invention;

[0021] Figure 2 This is a schematic diagram of the head forming device according to the present invention;

[0022] Figure 3 This is a schematic diagram of the tail forming device and the unloading machine according to the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the first forming device;

[0024] Figure 5 This is a structural schematic diagram of the first forming device from another angle;

[0025] Figure 6 This is a structural diagram of the clamping component;

[0026] Figure 7 This is a schematic diagram of the fixed-length mechanism;

[0027] Figure 8This is a schematic diagram of the transmission part of the tail forming device;

[0028] Figure 9 This is a schematic diagram of the flange mechanism according to the present invention;

[0029] Figure 10 This is a schematic diagram of the molding head according to the present invention;

[0030] Figure 11 This is a schematic diagram of the molding process according to the present invention;

[0031] Figure 12 This is a schematic diagram of the edge-cutting mechanism according to the present invention;

[0032] Figure 13 This is a schematic diagram of the cutting module according to the present invention;

[0033] Figure 14 This is a schematic diagram of the excision process according to the present invention;

[0034] Figure 15 These are before-and-after comparison images of the syringe barrel being flared and cut.

[0035] Figure label:

[0036] 1. Feeding machine; 2. Robotic arm; 3. Head forming device; 4. Tail forming device; 5. Unloading machine; 10. Head forming tray; 10. Clamping component; 101. Guide tube; 102. Guide sleeve; 103. Synchronous pulley; 104. Bushing; 105. First spring; 106. Lifting adjuster; 107. Flame ring; 108. Slider; 109. Slide rod; 111. Length fixing mechanism; 11. Breaking mechanism; 12. Flame heating device; 13. First forming device; 14. Second forming device; 15. Third forming device; 16. Fourth forming device. 17. Tail box; 18. First detection camera; 19. Cutting device; 110. Adjusting cylinder; 1101. Height lifting assembly; 1102. Lifting block; 1103. Rotary cylinder; 1104. Gripper cylinder; 1105. Lifting plate; 141. Forming needle assembly; 142. First horizontal adjustment assembly; 143. Second horizontal adjustment assembly; 144. Forming wheel assembly; 145. Forming needle; 146. Forming wheel; 147. Vertical plate; 1451. Power source; 1452. Connecting plate; 1453. Mounting base; 1454. First... Link 1455, Rotating plate 1456, Second link 1457, Synchronous belt drive mechanism 501, Tail forming tray 50, Clamping component 51, Flanging mechanism 52, Spinning mechanism 53, Trimming mechanism 54, Flattening mechanism 55, Horizontal rotation mechanism 56, Translation mechanism 57, Chain 58, Cooling fan 59, Displacement sensor 510, Lifting device 511, Waste discharge mechanism 512, Second detection camera 513, Mounting bracket 21, Lifting motor 22, Lifting module 23, Lifting support 24. Tilting motor 25. Tilting frame 26. Forming head 27. Limiting block 28. Ventilation hose 29. Body 271. Air outlet 272. Gripper a, syringe b, base plate 31. Lifting motor 32. Lifting mechanism 33. Positioning mechanism 34. Cutting module 35. Suction pipe 36. Hose 37. Vacuum pump 38. Mounting plate 351. Cylinder bracket 352. Connecting rod bracket 353. Cylinder 354. Connecting rod 355. Guide sleeve 356. Knife holder 357. Movable knife 358. Fixed knife 359. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The pre-filled syringe syringe forming machine and forming method of the present invention are described in detail below with reference to the accompanying drawings.

[0041] like Figures 1-15 As shown, the pre-filled syringe syringe molding machine according to an embodiment of the present invention includes: a feeder 1, a robotic arm 2, a head molding device 3, a tail molding device 4, and a discharger 5. The feeder 1 is used to provide a preform; the robotic arm 2 is used to clamp the preform from the feeder 1 and rotate it into a vertical position for supply; the head molding device 3 has multiple gripping members 101, which are evenly arranged in a circumferential direction. The gripping members 101 are used to receive the preform and drive the preform to rotate. The multiple gripping members 101 can revolve in a circumferential direction to bring the preform to different stations for head molding, thereby producing a semi-finished syringe. Finished product; The tail forming device 4 is located on one side of the head forming device 3. The tail forming device 4 has multiple clamping members 51, which are evenly arranged along the circumference. The clamping members 51 are used to receive the semi-finished product and drive the semi-finished product to rotate. The multiple clamping members 51 can revolve along the circumference to bring the semi-finished product to different workstations for tail forming, thereby making the finished product; The unloading machine 5 is located on one side of the tail forming device 4 to connect the finished product outward; The revolving path of the clamping member 51 and the revolving path of the clamping member 101 have a tangent point, and the axis of the clamping member 101 and the clamping member 51 coincide at the tangent point.

[0042] In other words, at the point of tangency, a certain length of material from the lower end of the preform on the head forming device 3 falls onto the tail forming device 4, thus changing the state from head forming to tail forming.

[0043] Therefore, the present invention has a simple and compact structure. The preform is fed by the feeding machine 1 and the robotic arm 2. The head forming device 3 drives the preform to rotate and revolve at the same time, so that the lower end of the preform can be formed multiple times during the movement to form a semi-finished product. Then, the tail forming device 4 drives the semi-finished product to rotate and revolve at the same time, so that the upper end of the semi-finished product can be formed multiple times again during the movement to form a finished product. The unloading machine 5 then unloads the preform. The present invention can realize automatic and continuous processing of preform feeding, head forming, tail forming and unloading. At the same time, the forming process is distributed into two circular processing areas for cyclical movement. The structure is relatively compact, occupies little space, and multiple stations work at the same time, resulting in high forming efficiency.

[0044] Combination Figure 2 The head forming device 3 also includes: multiple flame heating devices 13, a first forming device 14, a second forming device 15, a third forming device 16, and a fourth forming device 17. The first forming device 14, the second forming device 15, the third forming device 16, and the fourth forming device 17 are arranged at intervals along the revolution direction of the clamping member 101 to form the lower end of the preform in four stages in sequence. The multiple flame heating devices 13 are arranged along the circumferential direction, and the flame end of the flame heating device 13 is located on the movement path of the preform to heat the lower end of the preform.

[0045] Furthermore, a length-fixing mechanism 11, a breaking mechanism 12, a tail material box 18, a first detection camera 19, and a cutting device 110 are also provided between the first forming device 14 and the fourth forming device 17. The length-fixing mechanism 11 is located below the movement path of the preform and is used to determine the length of the lower end of the preform. The tail material box 18 is located below the movement path of the preform and is used to receive tail material. The breaking mechanism 12, the first detection camera 19, and the cutting device 110 are located on one side of the movement path of the preform. The first detection camera 19 is used for visual inspection of the head forming effect, the cutting device 110 is used to cut the preform, and the breaking mechanism 12 is used to knock off the semi-finished product.

[0046] In other words, the formed component in the head forming device 3 is located outside of multiple clamping members 101, which mainly house power equipment such as the DD motor and synchronous belt drive mechanism that drive the rotation. Multiple flame heating devices 13 are provided to heat the lower end of the preform in a timely manner, facilitating extrusion forming of the lower end. The cutting device 110 mainly uses a diamond cutter to cut the preform at high speed. The breaking mechanism 12 mainly uses a cylinder to strike the cut preform to complete the cutting. When transitioning from the head forming state to the tail forming state, that is, simultaneously with the cutting, a clamping member 51 directly below the breaking mechanism 12 is ready to receive the falling semi-finished product.

[0047] Combination Figure 6 Multiple clamping components 101 are installed on the head forming tray 10. Each clamping component 101 includes a guide tube 102, a synchronous pulley 104, a bushing 105, a first spring 106, a lifting adjuster 107, a flange ring 108, a slider 109, and a sliding rod 111. The synchronous pulley 104 is sleeved on the guide tube 102, the bushing 105 is rotatably sleeved on the guide tube 102, the slider 109 is installed at the lower end of the guide tube 102, the flange ring 108 is located between the first spring 106 and the slider 109, and multiple sliding rods 111 are movably installed on the flange ring 108. The sliding rods 111 are slidably connected to the slider 109. The first spring 106 is located between the bushing 105 and the flange ring 108. The lifting adjuster 107 drives the flange ring 108 to move up and down, so that the multiple sliding rods 111 clamp or release the preform.

[0048] A guide sleeve 103 is installed above the guide tube 102. The guide sleeve 103 has an inverted conical surface to facilitate the insertion of the preform into the guide tube 102. In this embodiment, there are three slide rods 111. The three slide rods 111 are evenly arranged along the circumference, and the extension lines of the lower ends of the three slide rods 111 converge at a point, which falls on the axis of the guide tube 102. The flange ring 108 has an I-shaped cross-section. A bearing is provided on the lifting adjuster 107. The bearing is rolled and locked on the side of the flange ring 108. This ensures that the flange ring 108 rolls and contacts the bearing when rotating, so that there is no friction between the rotational movement and the locking movement during the up and down lifting. Both the bushing 105 and the lifting adjuster 107 are installed on the head forming tray 10. The lifting adjuster 107 has a gear and rack structure. When it is opened, the flange ring 108 is driven to rise through the lifting adjuster 107. At the same time, the three slide rods 111 rise and expand in the circumferential direction. Then the preform falls and the lifting adjuster 107 is released. The first spring 106 pushes the flange ring 108 downward. At the same time, the three slide rods 111 descend and retract inward to complete the clamping with the preform.

[0049] Combination Figure 7It can be seen that the length-fixing mechanism 11 mainly includes an adjusting cylinder 1101, a height lifting component 1102, and a lifting block 1103. The height lifting component 1102 is mainly a motor lifting mechanism. The output end of the height lifting component 1102 is equipped with a lifting block 1103. The height of the lifting block 1103 is adjusted according to the length of different syringes. The adjusting cylinder 1101 is mainly used to lift the lifting regulator 107 upward, thereby driving the flange ring 108 and the three slide rods 111 to move upward, thereby opening the three slide rods 111 so that the preform can fall on the lifting block 1103 for length-fixing. Then the adjusting cylinder 1101 retracts, and the three slide rods 111 close to clamp the preform. The gripper cylinder 1105 is installed on the rotary cylinder 1104. The gripper cylinder 1105 is used to hold the tail material on the preform. Then the rotary cylinder 1104 rotates the tail material to the tail material box 18. After the gripper cylinder 1105 is released, the tail material falls into the tail material box 18.

[0050] Combination Figure 4 and Figure 5 The first forming device 14 includes a lifting plate 141, a forming needle assembly 142, a first horizontal adjustment assembly 143, a second horizontal adjustment assembly 144, and a forming wheel assembly 145. The first horizontal adjustment assembly 143 is mounted on the lifting plate 141, the second horizontal adjustment assembly 144 is mounted on the first horizontal adjustment assembly 143, and the forming wheel assembly 145 is mounted on the second horizontal adjustment assembly 144. The adjustment direction of the second horizontal adjustment assembly 144 is perpendicular to that of the first horizontal adjustment assembly 143. The forming needle assembly 142 is located in the middle of the forming wheel assembly 145. The forming wheel assembly 145 has two forming wheels 147, which are close to each other to extrude and form the lower end of the preform.

[0051] Below the lifting plate 141 are four guide post and guide sleeve assemblies and a height adjustment handwheel. By rotating the handwheel, the height of the entire first forming device 14 can be adjusted to match the height of the lower end of the preform. The first horizontal adjustment assembly 143 and the second horizontal adjustment assembly 144 are both composed of a drive motor, a lead screw and nut mechanism, and a guide rail and slider structure. They are mainly used to fine-tune the position of the forming wheel assembly 145 on the horizontal plane, thereby ensuring that the preform is located at the center position of the two forming wheels 147.

[0052] A forming needle 146 is vertically arranged on the forming needle assembly 142. The forming needle 146 is used to insert into the center of the preform to form a needle hole to accommodate the needle tip, so as to prevent the preforms from sticking together completely during the forming process.

[0053] Specifically, the forming wheel assembly 145 includes a vertical plate 1451, a power source 1452, a connecting plate 1453, two mounting seats 1454, a first connecting rod 1455, a rotating plate 1456, and a second connecting rod 1457. The two forming wheels 147 are correspondingly mounted on the two mounting seats 1454. The two mounting seats 1454 are slidably mounted on the vertical plate 1451. The power source 1452 drives one mounting seat 1454 to move closer to or away from the forming needle 146. The middle part of the rotating plate 1456 is rotatably mounted on the vertical plate 1451. One end of the rotating plate 1456 is connected to one mounting seat 1454 via the first connecting rod 1455, and the other end of the rotating plate 1456 is connected to the other mounting seat 1454 via the second connecting rod 1457 and the connecting plate 1453. Figure 5 As can be seen, if the rotating plate 1456 rotates clockwise, the two forming wheels 147 will move closer together; if the rotating plate 1456 rotates counterclockwise, the two forming wheels 147 will move further apart.

[0054] On the other hand, the main structures of the first molding device 14, the second molding device 15, the third molding device 16 and the fourth molding device 17 are the same, the difference is that the shape of the molding wheel 147 is different, and the molding is carried out in four stages, which can improve the molding quality.

[0055] Combination Figure 3 The tail forming device 4 also includes multiple flame heating devices 13, a flanging mechanism 52, a spinning mechanism 53, a trimming mechanism 54, and a flattening mechanism 55. The flanging mechanism 52, the spinning mechanism 53, the trimming mechanism 54, and the flattening mechanism 55 are arranged at intervals along the revolution direction of the clamping member 51, and are used to sequentially perform flanging, spinning forming, or flanging, spinning, trimming, and flattening forming on the upper end of the semi-finished product. The multiple flame heating devices 13 are arranged along the circumferential direction, and the flame end of the flame heating device 13 is located on the movement path of the semi-finished product, and is used to heat the upper end of the semi-finished product.

[0056] Furthermore, multiple clamping components 51 are installed on the tail forming tray 50. Two synchronous belt drive mechanisms 501 are installed on the tail forming tray 50. One synchronous belt drive mechanism 501 drives the clamping components 51 at the corresponding positions of the flanging mechanism 52 and the spinning mechanism 53 to rotate, and the other synchronous belt drive mechanism 501 drives the clamping components 51 at the corresponding positions of the flattening mechanism 55 to rotate.

[0057] In other words, the tail of the syringe barrel is folded over to make it easier to hook the syringe with a finger for injection. Whether to cut the edge after folding depends on the design of different syringes. The two synchronous belt drive mechanisms 501 can be selected to work according to the actual process requirements.

[0058] The flanging mechanism 52 is mainly used to fold the upper end of the semi-finished product outward to form a flanging, while the spinning mechanism 53 is used for shaping to ensure a flat surface after flanging. The trimming mechanism 54 is used to cut off both sides of the flanging, and the flattening mechanism 55 is used to flatten the end face of the remaining part after trimming. During the entire tail forming process, the upper end of the syringe barrel also needs to be heated and softened by the flame heating device 13 to improve the forming effect.

[0059] Combination Figures 9 to 11 The flanging mechanism 52 includes: a mounting frame 21, a lifting mechanism and a flipping mechanism. The lifting mechanism is mounted on the mounting frame 21; the flipping mechanism is mounted on the output end of the lifting mechanism. The lifting mechanism drives the flipping mechanism to move in the vertical direction to approach or move away from the syringe b. The flipping mechanism has a forming head 27. The flipping mechanism drives the forming head 27 to rotate so that the tail of the syringe b flips outward to form a flash.

[0060] In other words, the lifting mechanism first drives the forming head 27 to insert downward into the tail of the syringe b to a certain depth, and then the flipping mechanism drives the forming head 27 to rotate, so that the tail of the syringe b gradually flips outward with the forming head 27 to form a flash.

[0061] Therefore, the present invention has a simple structure and automates the entire molding process by using a lifting mechanism and a flipping mechanism, avoiding manual intervention and improving molding efficiency. At the same time, the flipping mechanism drives the molding head 27 to rotate, and during the rotation, the tail of the syringe b is formed with flash. Compared with the method of directly pressing down with a mold, the present invention performs gradual flanging molding during rotation, resulting in better molding effect and less likelihood of deformation or crushing.

[0062] According to one embodiment of the present invention, the lifting mechanism includes a lifting module 23 and a lifting bracket 24. The lifting module 23 is mounted on a mounting frame 21, and the lifting bracket 24 is located at the output end of the lifting module 23. Further, a lifting motor 22 is mounted on the lifting module 23 as a power source.

[0063] In other words, the lifting module 23 is a linear module set in the vertical direction, which has high motion accuracy.

[0064] According to one embodiment of the present invention, the flipping mechanism further includes a flipping motor 25 and a flipping frame 26. The flipping motor 25 is mounted on a lifting bracket 24, and the flipping frame 26 is connected to the output end of the flipping motor 25. A forming head 27 is mounted on the flipping frame 26. The flipping frame 26 is L-shaped, with one end of the flipping frame 26 mounted on the output end of the flipping motor 25 and the forming head 27 mounted on the other end. Preferably, the line containing the forming head 27 is perpendicular to the rotation axis of the flipping motor 25. More preferably, a limiting block 28 is mounted on the lifting bracket 24 to limit the rotation of the flipping frame 26.

[0065] In this embodiment, the flip motor 25 and the lifting module 23 are both located on one side of the lifting bracket 24, and the flip frame 26 is located on the other side of the lifting bracket 24. The output end of the flip motor 25 passes through the lifting bracket 24 and is connected to the flip frame 26. The limiting block 28 is located on the other side of the lifting bracket 24. One right-angled side of the flip frame 26 is parallel to the lifting bracket 24 and is connected to the output end of the flip motor 25. The other right-angled side of the flip frame 26 is perpendicular to the lifting bracket 24. That is to say, in the initial state, the other right-angled side of the flip frame 26 is located at the uppermost position, and the forming head 27 is vertically installed on the other right-angled side of the flip frame 26. When the flip frame 26 abuts against the limiting block 28, the forming head 27 is in a horizontal position.

[0066] Based on this, the forming head 27 includes a body 271, which is a hollow part. The upper end of the body 271 is connected to a ventilation hose 29. The lower end surface of the body 271 is formed into a conical surface, and multiple evenly distributed air outlets 272 are opened on the circumferential surface along the circumferential direction.

[0067] In other words, during use, the tail of syringe b needs to be heated and softened first. After clamping syringe b with gripper a, it is rotated, and then the forming head 27 is used to flip it outward. As syringe b rotates, flash gradually forms in the circumferential direction. Compared with the method of directly pressing down with a mold to form it in one step, the flash of syringe b processed by this invention has a rounded transition, which is not easy to deform or break. Cooling gas is introduced into the body 271 through the ventilation hose 29 and discharged from the air outlet 272. The cooling gas contacts the tail of syringe b, so that the formed flash is quickly cooled and solidified, thereby improving the forming accuracy.

[0068] Combination Figures 12 to 15 The trimming mechanism 54 includes: a base plate 31, a lifting device, a cutting module 35, and a discharge mechanism. The lifting device is mounted on the base plate 31. The cutting module 35 is located at the output end of the lifting device. The lifting device drives the cutting module 35 to move vertically. The cutting module 35 has a movable blade 358 and a fixed blade 359. The movable blade 358 is located below the syringe flange, and the fixed blade 359 is located above the syringe flange. The movable blade 358 can move upward to complete the cutting of the syringe flange. One end of the discharge mechanism is located above the movable blade 358 to suck up and discharge the cut portion from the syringe flange.

[0069] Therefore, the present invention has a simple structure. It uses a lifting device to control the cutting module 35 to approach the syringe. The moving blade 358 and the fixed blade 359 on the cutting module 35 perform a cutting action, thereby quickly cutting off the flange of the syringe. The cutting efficiency and cutting accuracy are improved. Furthermore, for syringes that do not need to be cut, the lifting device can keep the cutting module 35 at a high position to achieve selective cutting. On the other hand, the material discharge mechanism sucks away and discharges the cut part, realizing the centralized collection of the cut waste and keeping the working environment clean.

[0070] Specifically, the lifting device includes a lifting motor 32 and a lifting mechanism 33. The lifting motor 32 is installed below the base plate 31, and the lifting mechanism 33 is installed above the base plate 31. The lifting motor 32 is connected to the lifting mechanism 33 in a transmission manner, and the lifting motor 32 provides lifting power to the lifting mechanism 33.

[0071] In this embodiment, the output end of the lifting motor 32 passes upward through the base plate 31 and is connected to the lifting mechanism 33. The output end of the lifting mechanism 33 is connected to the mounting plate 351. At the same time, guide column and guide sleeve assemblies are provided on both sides of the output end of the lifting mechanism 33 to ensure the stability of vertical movement.

[0072] According to one embodiment of the present invention, a positioning mechanism 34 is installed on one side of the lifting mechanism 33, and the positioning mechanism 34 is used to position the syringe during resection. Further, the side of the positioning mechanism 34 facing the syringe is formed into a V-shaped positioning surface.

[0073] To ensure the syringe remains stable during excision and to guarantee excision accuracy, the positioning mechanism 34 is mainly a horizontally telescopic cylinder with an output end forming a V-shaped positioning surface. The V-shaped positioning surface mainly cooperates with the gripper a that holds the syringe b, and prevents the syringe b from moving or shifting by pressing against the gripper a.

[0074] According to one embodiment of the present invention, the cutting module 35 includes a mounting plate 351, a cylinder 354 and a transmission mechanism. The cylinder 354 is mounted on the mounting plate 351 via a cylinder bracket 352. The fixed blade 359 is mounted on the lower surface of the mounting plate 351. The output end of the cylinder 354 is connected to the movable blade 358 via the transmission mechanism to drive the movable blade 358 to move in the vertical direction.

[0075] That is, the fixed blade 359 is fixedly installed on the lower surface of the mounting plate 351. In the initial state, the movable blade 358 is located on one side below the fixed blade 359. During operation, the movable blade 358 moves upward and works with the fixed blade 359 to perform a cutting action, thereby cutting off the syringe flange located between the movable blade 358 and the fixed blade 359. The movable blade 358 continues to move upward and approaches the discharge mechanism, thereby sucking away the cut waste material.

[0076] Preferably, the transmission mechanism includes a connecting rod 355, a guide sleeve 356, and a tool holder 357. The connecting rod 355 is mounted on the mounting plate 351 via a connecting rod bracket 353. The connecting rod 355 is connected to the output end of the cylinder 354 and is also connected to the tool holder 357. The guide sleeve 356 is located on the mounting plate 351, and the tool holder 357 is slidably disposed within the guide sleeve 356. A movable tool 358 is mounted at the lower end of the tool holder 357. An oil groove is provided on the tool holder 357, and lubrication ensures smooth sliding with the guide sleeve 356, preventing jamming. More preferably, the cylinder 354 is rotatably connected to the cylinder bracket 352, and the output end of the cylinder 354 and the connecting rod bracket 353 are rotatably connected to the connecting rod 355. The tool holder 357 is movably connected to the connecting rod 355, and the extension / retraction direction of the cylinder 354 is perpendicular to the sliding direction of the tool holder 357.

[0077] In this embodiment, the connecting rod 355 has three connection points. The lower connection point is rotatably connected to the connecting rod bracket 353, and the upper connection point is rotatably connected to the cylinder 354. When the cylinder 354 performs telescopic movement, it drives the connecting rod 355 to rotate with the lower connection point as the center. Since the tool holder 357 is movably connected to the connection point on the upper side of the connecting rod 355 on one hand, and also slidably connected to the guide sleeve 356 in the vertical direction on the other hand, the cylinder 354 will drive the tool holder 357 to move vertically, thereby driving the movable tool 358 to move vertically.

[0078] According to one embodiment of the present invention, the discharge mechanism includes a suction pipe 36, a hose 37 and a vacuum pump 38. One end of the suction pipe 36 passes through the mounting plate 351 and faces the movable blade 358. One end of the hose 37 is connected to the other end of the suction pipe 36, and the other end of the hose 37 is provided with the vacuum pump 38.

[0079] In this embodiment, there are two movable blades 358, which are symmetrically arranged about the fixed blade 359.

[0080] Specifically, the number of discharge mechanisms corresponds to the number of movable blades 358, and each discharge mechanism is used to suck away the flared waste material cut off by the corresponding movable blade 358.

[0081] Based on this, the width of the fixed blade 359 can be set according to the syringe. During excision, the movable blade 358 and the fixed blade 359 are fitted with a gap.

[0082] In other words, both the fixed blade 359 and the movable blade 358 are located on the side of the blade holder 357, and the horizontal position of the movable blade 358 on the blade holder 357 can be adjusted, which makes it easy to cooperate with the fixed blade 359 to adapt to syringes of different sizes.

[0083] During operation, the lifting device drives the cutting module 35 downward to the conveying path of the syringe b. The cylinder 354 is in the extended state, so that the flange of the syringe b is located between the fixed blade 359 and the movable blade 358. Then, the positioning mechanism 34 abuts against the gripper a for positioning. Then, the cylinder 354 retracts, the movable blade 358 moves upward to complete the cutting. The vacuum pump 38 generates negative pressure to suck away and discharge the cut waste. The lifting device moves downward so that the syringe b can continue to be conveyed after cutting.

[0084] According to one embodiment of the present invention, the unloading machine 5 includes a horizontal rotation mechanism 56, a translation mechanism 57, a chain 58, and a cooling fan 59. The horizontal rotation mechanism 56 is used to remove the finished product from the clamping member 51 and rotate it to a horizontal state. The translation mechanism 57 transports the finished product to the chain 58. The cooling fan 59 is installed on the chain 58 to dissipate heat from the finished product.

[0085] The chain 58 is equipped with a displacement sensor 510, a lifting device 511, a waste discharge mechanism 512, and a second inspection camera 513. The displacement sensor 510 is used to detect the length of the finished product, the lifting device 511 is used to lift the finished product, and the second inspection camera 513 is used to detect the tail forming effect. The waste discharge mechanism 512 is used to remove the finished products that fail the inspection.

[0086] In other words, the horizontal rotation mechanism 56 and the translation mechanism 57 mainly flip the vertical syringe to a horizontal position and transport it to the chain line 58 for unloading. The cooling fan 59 provides rapid heat dissipation to ensure the shape is fixed after molding. A guide plate is provided on the opposite side of the displacement sensor 510 to hold one end of the passing syringe. The displacement sensor 510 detects the other end of the syringe to determine whether the length is qualified. The lifting device 511 is mainly a cylinder that lifts the finished product to the height of the second inspection camera 513 for visual inspection. The waste discharge mechanism 512 mainly consists of a lifting cylinder and an upwardly inclined discharge plate. When a finished product is unqualified, the lifting cylinder lifts the product, and then the upper end of the discharge plate catches the unqualified product, which falls into the waste box along the discharge plate.

[0087] This invention also discloses a molding method, which uses the pre-filled syringe syringe molding machine described above for molding processing, including the following steps: Step 1: The feeding machine 1 and the robotic arm 2 work together to insert the preform into multiple clamping parts 101 in sequence; Step 2: The clamping parts 101 rotate on their own axis and revolve around the sun, thereby moving the lower end of the preform to the molding station for multiple extrusion molding, and performing flame heating treatment before each molding; Step 3: After the head is molded, it is inspected and cut off to become a semi-finished product, and the clamping part 51 receives the semi-finished product; Step 4: According to the processing requirements, the semi-finished product is moved to the molding station, and the upper end of the semi-finished product is sequentially flanged and spun, or flanged, spun, cut, and flattened; Step 5: After the tail is molded, a finished product is formed, which is conveyed out by the unloading machine 5 and inspected and screened.

[0088] In summary, the molding machine of this invention has a compact structure and abandons the traditional single injection molding scheme. By performing staged hot extrusion molding of preforms, multiple preforms and multiple semi-finished products are processed at the same time, realizing the automation of the pre-filled syringe syringe molding process, effectively improving processing efficiency and avoiding the harm to the human body caused by high-temperature working environment.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pre-filled syringe syringe forming machine, characterized in that, include: Feeder (1), the feeder (1) is used to provide preforms; Robotic arm (2), the robotic arm (2) is used to clamp and rotate the preforms into a vertical position from the feeder (1) for feeding; The head forming device (3) has multiple clamping parts (101) on it. The multiple clamping parts (101) are evenly arranged in the circumferential direction. The clamping parts (101) are used to receive the preform and drive the preform to rotate. The multiple clamping parts (101) can revolve in the circumferential direction to bring the preform to different work stations for head forming, thereby making a semi-finished product. Tail forming device (4), the tail forming device (4) is located on one side of the head forming device (3), the tail forming device (4) has multiple clamping members (51), the multiple clamping members (51) are evenly arranged in the circumferential direction, the clamping members (51) are used to receive the semi-finished product and drive the semi-finished product to rotate, the multiple clamping members (51) can revolve in the circumferential direction to bring the semi-finished product to different work stations for tail forming, thereby making the finished product; The tail forming device (4) includes a flanging mechanism (52), which includes a mounting frame, a lifting mechanism, a flipping mechanism, and a forming head (27). The flipping mechanism includes a flipping motor (25) and an L-shaped flipping frame (26). One right-angled side of the flipping frame (26) is connected to the output end of the flipping motor (25), and the forming head (27) is installed on the other right-angled side. The forming head (27) is provided with an air outlet (272) and is connected to a ventilation hose (29). A limit block (28) is provided on the rotation path of the flipping frame (26). When the flipping frame (26) rotates to abut against the limit block (28), the forming head (27) is in a horizontal working position. The feeding machine (5) is located on one side of the tail forming device (4) to connect the finished product outward; The orbital path of the clamping member (51) and the orbital path of the gripping member (101) have a tangent point, and the axis of the gripping member (101) and the clamping member (51) coincide at the tangent point.

2. The pre-filled syringe syringe forming machine according to claim 1, characterized in that, The head forming device (3) further includes: multiple flame heating devices (13), a first forming device (14), a second forming device (15), a third forming device (16), and a fourth forming device (17). The first forming device (14), the second forming device (15), the third forming device (16), and the fourth forming device (17) are arranged at intervals along the revolution direction of the clamping member (101) to form the lower end of the preform in four stages in sequence. The multiple flame heating devices (13) are arranged along the circumferential direction. The flame end of the flame heating device (13) is located on the movement path of the preform and is used to heat the lower end of the preform.

3. The pre-filled syringe syringe forming machine according to claim 2, characterized in that, Between the first forming device (14) and the fourth forming device (17), a length-fixing mechanism (11), a breaking mechanism (12), a tail material box (18), a first detection camera (19), and a cutting device (110) are also provided. The length-fixing mechanism (11) is located below the movement path of the preform and is used to determine the length of the lower end of the preform. The tail material box (18) is located below the movement path of the preform and is used to receive tail material. The breaking mechanism (12), the first detection camera (19), and the cutting device (110) are located on one side of the movement path of the preform. The first detection camera (19) is used to visually detect the head forming effect. The cutting device (110) is used to cut the preform. The breaking mechanism (12) is used to knock off the semi-finished product.

4. The pre-filled syringe syringe forming machine according to claim 1, characterized in that, Multiple clamping components (101) are mounted on the head forming tray (10). Each clamping component (101) includes a guide tube (102), a synchronous pulley (104), a bushing (105), a first spring (106), a lifting adjuster (107), a flange ring (108), a slider (109), and a slide rod (111). The synchronous pulley (104) is sleeved on the guide tube (102), the bushing (105) is rotatably sleeved on the guide tube (102), and the slider (109) is mounted on the guide tube (102). At the lower end of the tube (102), the flange ring (108) is located between the first spring (106) and the slider (109). Multiple slide rods (111) are movably mounted on the flange ring (108). The slide rods (111) are slidably connected to the slider (109). The first spring (106) is located between the bushing (105) and the flange ring (108). The lifting adjuster (107) drives the flange ring (108) to move up and down, so that the multiple slide rods (111) clamp or release the preform.

5. The pre-filled syringe syringe forming machine according to claim 2, characterized in that, The first forming device (14) includes a lifting plate (141), a forming needle assembly (142), a first horizontal adjustment assembly (143), a second horizontal adjustment assembly (144), and a forming wheel assembly (145). The first horizontal adjustment assembly (143) is mounted on the lifting plate (141), the second horizontal adjustment assembly (144) is mounted on the first horizontal adjustment assembly (143), and the forming wheel assembly (145) is mounted on the second horizontal adjustment assembly (144). The adjustment direction of the second horizontal adjustment assembly (144) is perpendicular to that of the first horizontal adjustment assembly (143). The forming needle assembly (142) is located in the middle of the forming wheel assembly (145). The forming wheel assembly (145) has two forming wheels (147) that are close to each other to extrude and form the lower end of the preform.

6. The pre-filled syringe syringe forming machine according to claim 1, characterized in that, The tail forming device (4) also includes multiple flame heating devices (13), a flanging mechanism (52), a spinning mechanism (53), a trimming mechanism (54), and a flattening mechanism (55). The flanging mechanism (52), the spinning mechanism (53), the trimming mechanism (54), and the flattening mechanism (55) are arranged at intervals along the revolution direction of the clamping member (51) to perform flanging, spinning forming, or flanging, spinning, trimming, and flattening forming on the upper end of the semi-finished product in sequence. The multiple flame heating devices (13) are arranged along the circumferential direction. The flame end of the flame heating device (13) is located on the movement path of the semi-finished product and is used to heat the upper end of the semi-finished product.

7. The pre-filled syringe syringe forming machine according to claim 6, characterized in that, Multiple clamping components (51) are mounted on the tail forming tray (50). Two synchronous belt drive mechanisms (501) are mounted on the tail forming tray (50). One synchronous belt drive mechanism (501) drives the clamping components (51) at the corresponding positions of the flanging mechanism (52) and the spinning mechanism (53) to rotate. The other synchronous belt drive mechanism (501) drives the clamping components (51) at the corresponding positions of the flattening mechanism (55) to rotate.

8. The pre-filled syringe syringe forming machine according to claim 1, characterized in that, The unloading machine (5) includes a horizontal rotation mechanism (56), a translation mechanism (57), a chain (58), and a cooling fan (59). The horizontal rotation mechanism (56) is used to remove the finished product from the clamp (51) and rotate it to a horizontal state. The translation mechanism (57) transports the finished product to the chain (58). The cooling fan (59) is installed on the chain (58) to dissipate heat from the finished product.

9. The pre-filled syringe syringe forming machine according to claim 8, characterized in that, The chain (58) is also equipped with a displacement sensor (510), a lifting device (511), a waste discharge mechanism (512), and a second detection camera (513). The displacement sensor (510) is used to detect the length of the finished product. The lifting device (511) is used to lift the finished product, and the second detection camera (513) is used to detect the tail forming effect. The waste discharge mechanism (512) is used to remove the finished products that fail the test.

10. A molding method, wherein the pre-filled syringe syringe molding machine as described in any one of claims 1-9 is used for molding, characterized in that, Includes the following steps, Step 1: The feeding machine (1) and the robotic arm (2) work together to insert the preform into multiple clamping parts (101) in sequence; Step 2: The clamping part (101) rotates on its own axis while revolving around the sun, thereby driving the lower end of the preform to move to the forming station for multiple extrusion moldings, and flame heating treatment is performed before each molding. Step 3: After the head is formed, it is inspected and cut to become a semi-finished product. The clamping part (51) receives the semi-finished product. Step 4: According to the processing requirements, move the semi-finished product to the forming station, and perform flanging, spinning, or flanging, spinning, trimming and flattening on the upper end of the semi-finished product in sequence. Step 5: After the tail section is formed, the finished product is formed and conveyed out by the feeding machine (5) for testing and screening.

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