Thermal flanging device for outer needle cap of pneumatic pre-filling and sealing injector

Abstract

The utility model discloses a hot flanging device for an outer needle cap of a pneumatic prefilled injector, which comprises a lower fixed seat and an upper fixed seat which are symmetrically distributed up and down, a heating mold seat, a cooling mold seat and an ejection mold seat are sequentially arranged between the lower fixed seat and the upper fixed seat, and a heating mold main body is slidably mounted on the bottom surface of the heating mold seat. According to the utility model, the die and the die holder are connected in a sliding manner, and the die has different specifications, so that the die with the same specification can be detached and replaced; multiple production requirements of sample trial-production, small-batch production and large-batch production of the pre-filled syringe outer needle cap are met, the cooling mold main body is arranged, so that the whole body has a cooling function, and the flanging forming effect of the pre-filled syringe outer needle cap is guaranteed; and finally, through the arranged limiting assembly rod, the whole device has a limiting function, dislocation in the lifting process is avoided, and stability and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefilled syringe production, in particular to a pneumatic prefilled syringe outer needle cap hot flanging device. Background Art

[0002] At present, the domestic medical prefilled syringe needle cap assembly new product development sample trial production and small batch production all adopt the production process of direct injection molding on the outer needle cap injection molding mold. The use of this process to manufacture the outer needle cap of the prefilled syringe will increase the difficulty of manufacturing the injection molding mold and increase the mold cost. In addition, the parts are prone to defects such as heat flanging deformation and flash on the mouth after forced ejection and demolding, which cannot meet the technical requirements of the needle cap assembly. The existing production equipment cannot meet the needs of sample trial production and small batch production of new products of the prefilled syringe needle cap assembly.

[0003] In the application document with the publication number CN205767447U, a pneumatic prefilled syringe outer needle cap hot flanging device is proposed. The pneumatic prefilled syringe outer needle cap hot flanging device adopts a molding upper mold and a lower mold cavity plate to cooperate, and a heating tube structure is arranged in the molding upper mold, which can heat the molding upper mold to the outer needle cap hot flanging process temperature, complete the flanging and demolding, and has high production efficiency; the cylinder piston rod 1 adopts a mold handle and a top screw to fix the molding upper mold to ensure that the molding upper mold plate can move up and down freely; this device can reduce the mold cost, improve the flanging quality, and prevent the defects of hot flanging deformation, flash on the mouth, etc., which effectively solves the above problems.

[0004] However, there are still some defects and deficiencies that need to be optimized. The specific defects and deficiencies are as follows: the mold fixation in the hot flanging device of the outer needle cap of the pneumatic prefilled syringe can only meet the needs of sample trial production and small batch production. Secondly, there is no cooling function, resulting in the flanging molding effect cannot be guaranteed. Finally, there is no unlimited position function, which is easy to cause misalignment during the lifting process, and stability and reliability cannot be guaranteed.

[0005] Therefore, it is particularly important to design a pneumatic prefilled syringe outer needle cap heat flanging device to solve the above-mentioned defects. Utility Model Content

[0006] 1) Technical problems to be solved by the utility model

[0007] In view of the shortcomings of the prior art, the utility model designs a pneumatic prefilled syringe outer needle cap hot flanging device, which solves the technical problems that the mold is fixed in the existing pneumatic prefilled syringe outer needle cap hot flanging device, and can only meet the needs of sample trial production and small batch production. Secondly, it has no cooling function, resulting in the flanging forming effect cannot be guaranteed. Finally, it has no unlimited positioning function, which is easy to cause dislocation during the lifting process, and the stability and reliability cannot be guaranteed.

[0008] 2) Technical solution

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A pneumatic prefilled syringe outer needle cap hot flanging device comprises a lower fixed seat and an upper fixed seat which are symmetrically distributed in an upper and lower manner, a heating mold seat, a cooling mold seat and an ejector mold seat are arranged in sequence between the lower fixed seat and the upper fixed seat, a heating mold body is slidably mounted on the bottom surface of the heating mold seat, a first locking bolt is spirally mounted at the center of one side of the heating mold seat, a cooling mold body which is compatible with the specifications of the heating mold body is slidably mounted on the top surface of the cooling mold seat, a second locking bolt is spirally mounted at the center of one side of the cooling mold seat, an ejector mold body which is compatible with the specifications of the cooling mold body is slidably mounted on the top surface of the ejector mold seat, a third locking bolt is spirally mounted at the center of one side of the ejector mold seat, a limiting assembly rod is penetrated and installed near the four corners between the lower fixed seat and the upper fixed seat, a limiting seat is fixedly mounted on the upper and lower ends of the limiting assembly rod, and a matching positioning pin is penetrated and installed inside the limiting seat.

[0011] As a preferred solution of the utility model, the limiting assembly rods near the four corners between the lower fixed seat and the upper fixed seat sequentially penetrate the heating mold base, the cooling mold base and the ejection mold base near the four corners, the limiting assembly rods are slidably connected to the heating mold base and the ejection mold base, and the limiting assembly rods are fixedly connected to the cooling mold base.

[0012] As a preferred solution of the utility model, a resistance heating structure is embedded and installed inside the heating mold body, and the resistance heating structure is electrically connected to an external fixed power supply. An annular circulating cooling cavity is provided inside the cooling mold body, and the annular circulating cooling cavity is connected to the refrigeration water tank through a circulating water circuit. A movable slot is provided inside the cooling mold base near the bottom surface of the cooling mold body.

[0013] As a preferred solution of the utility model, a syringe outer needle cap embedded block is fixedly installed on the bottom surface of the heating mold body, the heating mold body is provided with different specifications, and the number of groups of syringe outer needle cap embedded blocks on the bottom surface of each specification of the heating mold body is different, the interior of the cooling mold body matched with the specifications of the heating mold body is penetrated by a syringe outer needle cap groove corresponding to the syringe outer needle cap embedded block, and the top surface of the ejection mold body matched with the specifications of the cooling mold body is fixedly installed with an ejector seat corresponding to the syringe outer needle cap groove.

[0014] As a preferred solution of the utility model, the first insulating handle, the second insulating handle and the third insulating handle are fixedly installed on the same side of the heating mold body, the cooling mold body and the ejection mold body, respectively, and both ends of the heating mold body, the cooling mold body and the ejection mold body are provided with a convex block design.

[0015] As a preferred solution of the utility model, the ejector mold base is movably mounted on the top surface of the lower fixed base through a first pneumatic telescopic mechanism, support feet are fixedly mounted around the bottom of the lower fixed base, and the heating mold base is movably mounted on the bottom surface of the upper fixed base through a second pneumatic telescopic mechanism.

[0016] 3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] In the utility model, the mold and the mold base are connected in a sliding manner, and the molds have different specifications. The molds of the same specifications can be disassembled and replaced, which meets various production needs of sample trial production, small batch production and large batch production of the outer needle caps of prefilled syringes. Secondly, the cooling mold body is provided so that the whole has a cooling function, so that the flanging molding effect of the outer needle cap of the prefilled syringe is guaranteed. Finally, the limiting assembly rod is provided so that the whole has a limiting function, which avoids dislocation during the lifting process. It is stable and reliable, thereby effectively solving the problems raised in the above-mentioned background technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional external structure of the utility model;

[0020] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the heating mold base in the utility model;

[0021] Figure 3 It is a schematic diagram of the three-dimensional enlarged structure of the cooling mold base in the utility model;

[0022] Figure 4 It is a three-dimensional enlarged structural schematic diagram of the ejector mold base in the utility model;

[0023] Figure 5 A is a schematic diagram of the enlarged structure of the local area in the utility model;

[0024] In the figure: 1. lower fixed seat; 11. first pneumatic telescopic mechanism; 12. supporting foot; 2. upper fixed seat; 21. second pneumatic telescopic mechanism; 3. heating mold seat; 31. heating mold body; 311. syringe outer needle cap embedded block; 312. first insulating handle; 32. first locking bolt; 4. cooling mold seat; 41. cooling mold body; 411. syringe outer needle cap groove; 412. second insulating handle; 42. second locking bolt; 5. ejector mold seat; 51. ejector mold body; 511. ejector seat; 512. third insulating handle; 52. third locking bolt; 6. limit assembly rod; 61. limit seat; 62. positioning pin. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] Example:

[0027] The utility model provides a pneumatic prefilled syringe outer needle cap heat flanging device, which solves the technical problems that the mold is fixed in the existing pneumatic prefilled syringe outer needle cap heat flanging device, which can only meet the needs of sample trial production and small batch production, and secondly, there is no cooling function, resulting in the flanging forming effect cannot be guaranteed, and finally there is no limit function, which is easy to cause misalignment during the lifting process, and the stability and reliability cannot be guaranteed;

[0028] See also Figure 1-Figure 5 The utility model provides a technical solution: a pneumatic pre-filled syringe outer needle cap heat flanging device, comprising a lower fixing seat 1 and an upper fixing seat 2 which are symmetrically distributed up and down, and a heating mold seat 3, a cooling mold seat 4, and an ejection mold seat 5 are arranged between the lower fixing seat 1 and the upper fixing seat 2 in sequence.

[0029] The bottom surface of the heating mold base 3 is slidably mounted with a heating mold body 31, and a resistance heating structure is embedded in the heating mold body 31, which is electrically connected to an external fixed power supply. A syringe outer needle cap embedded block 311 is fixedly mounted on the bottom surface of the heating mold body 31. The heating mold body 31 is provided with different specifications, and the number of syringe outer needle cap embedded blocks 311 on the bottom surface of each specification of the heating mold body 31 is different. A first locking bolt 32 is spirally mounted at the center of one side of the heating mold base 3. Under the action of pneumatics, the heating mold base 3 descends, and the heating mold body 31 descends accordingly, and the The syringe outer needle cap embedded block 311 is embedded into the inner part of the syringe outer needle cap near the top, and the heating mold body 31 is heated to a constant process temperature. After the inner part of the prefilled syringe outer needle cap near the top is heated and softened, the heating mold base 3 continues to descend to perform heat flanging on the mouth of the syringe outer needle cap, and the heating is stopped after the flanging is completed. By replacing molds of different specifications, various production needs of sample trial production, small batch production and large batch production of prefilled syringe outer needle caps can be met. During the disassembly and assembly process, the disassembly and assembly of the heating mold bodies 31 of different specifications can be achieved by rotating the first locking bolt 32.

[0030] Among them, a cooling mold body 41 that is compatible with the specifications of the heating mold body 31 is slidably installed on the top surface of the cooling mold base 4, and an annular circulating cooling cavity is opened inside the cooling mold body 41, which is connected with the refrigeration water tank through a circulating water circuit. The cooling mold body 41 that is compatible with the specifications of the heating mold body 31 is penetrated with a syringe outer needle cap groove 411 corresponding to the syringe outer needle cap embedded block 311, and a movable notch is penetrated through the bottom surface of the cooling mold body 41 near the cooling mold body 41 inside the cooling mold base 4, and a second locking bolt 42 is spirally installed at the center of one side of the cooling mold base 4. Before processing, the outer needle cap of the prefilled syringe to be processed can be embedded and installed inside the outer needle cap groove 411 of the syringe. After the hot flanging is completed, the refrigeration water tank allows the cooling mold body 41 to quickly cool the mouth of the outer needle cap of the syringe through the circulating water circuit, so that the flanging molding effect of the outer needle cap of the prefilled syringe is guaranteed. During the disassembly and assembly process, the disassembly and assembly of cooling mold bodies 41 of different specifications can be achieved by rotating the second locking bolt 42.

[0031] Among them, an ejector mold body 51 that is compatible with the specifications of the cooling mold body 41 is slidably installed on the top surface of the ejector mold base 5, and a top seat 511 corresponding to the outer needle cap groove 411 of the syringe is fixedly installed on the top surface of the ejector mold body 51 that is compatible with the specifications of the cooling mold body 41. A third locking bolt 52 is spirally installed at the center of one side of the ejector mold base 5. Before loading, the ejector mold base 5 rises under the action of pneumatic movement. At this time, the ejector mold body 51 rises accordingly until the top of the ejector mold body 51 is located at the bottom end of the outer needle cap of the prefilled syringe. After cooling is completed, the ejector mold base 5 continues to rise under the action of pneumatic movement until the ejector mold body 51 ejects the outer needle cap of the prefilled syringe, thereby completing the processing. During the disassembly and assembly process, the ejector mold bodies 51 of different specifications can be disassembled and replaced by rotating the third locking bolt 52.

[0032] Among them, the limited assembly rods 6 are installed through the lower fixed seat 1 and the upper fixed seat 2 near the four corners, and the limited seats 61 are fixedly installed at the upper and lower ends of the limited assembly rod 6. The interior of the limited seat 61 is installed with a matching positioning pin 62. The limited assembly rods 6 between the lower fixed seat 1 and the upper fixed seat 2 near the four corners successively penetrate the heating mold base 3, the cooling mold base 4, and the ejection mold base 5 near the four corners. The limited assembly rods 6 are slidably connected with the heating mold base 3 and the ejection mold base 5, and the limited assembly rods 6 are fixedly connected with the cooling mold base 4. The positioning pins 62 are pulled out and the whole can be disassembled, otherwise it can be assembled. The structure is simple and the production and processing difficulty is small. At the same time, the limited assembly rods 6 are set to make the whole have a limiting function to avoid dislocation during the lifting process. It is stable and reliable.

[0033] In addition, in this embodiment, please refer to Figure 2 , Totem 3 and Figure 4 The first insulating handle 312, the second insulating handle 412 and the third insulating handle 512 are fixedly installed on the same side of the heating mold body 31, the cooling mold body 41 and the ejection mold body 51 respectively. Both ends of the heating mold body 31, the cooling mold body 41 and the ejection mold body 51 are provided with a convex block design, which can effectively prevent the mold body and the mold base from being separated. At the same time, the provided insulating handle can facilitate the disassembly and replacement of the mold body, and it is safer.

[0034] In addition, in this embodiment, please refer to Figure 1 The ejector mold base 5 is movably mounted on the top surface of the lower fixed base 1 through the first pneumatic telescopic mechanism 11, and the bottom of the lower fixed base 1 is fixedly mounted with support feet 12 around it. The heating mold base 3 is movably mounted on the bottom surface of the upper fixed base 2 through the second pneumatic telescopic mechanism 21. The supporting feet 12 can support the entire device, and the pneumatic telescopic mechanism provides power support for the entire device.

[0035] It should be noted that the first pneumatic telescopic mechanism 11 and the second pneumatic telescopic mechanism 21 are both prior arts, and will not be described in detail herein.

[0036] The working process of the utility model is as follows: before loading, the ejector mold base 5 rises under the action of pneumatics, and at this time, the ejector mold body 51 rises accordingly, until the top of the ejector mold body 51 is located at the bottom end of the outer needle cap of the prefilled syringe. Before processing, the outer needle cap of the prefilled syringe to be processed can be embedded and installed inside the outer needle cap groove 411 of the syringe. Then, under the action of pneumatics, the heating mold base 3 descends, and the heating mold body 31 descends accordingly, so that the inner block 311 of the outer needle cap of the syringe is embedded into the inner part of the outer needle cap of the syringe near the top. At the same time, the heating mold body 31 is heated to a constant process temperature, and the prefilled syringe is heated. After the inside of the outer needle cap is heated and softened near the top, the heating mold base 3 continues to descend to perform heat flanging on the mouth of the outer needle cap of the syringe, and the heating is stopped after the flanging is completed. After the heat flanging is completed, the refrigeration water tank uses the circulating water circuit to allow the cooling mold body 41 to quickly cool the mouth of the outer needle cap of the syringe. After cooling is completed, the ejector mold base 5 continues to rise under the action of pneumatic force until the ejector mold body 51 ejects the outer needle cap of the prefilled syringe, thereby completing the processing. The molds of different specifications can be disassembled, assembled and replaced according to needs, thereby meeting the various production needs of sample trial production, small batch production and large batch production of the outer needle cap of the prefilled syringe.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic prefilled syringe outer needle cap heat flanging device, comprising a lower fixing seat (1) and an upper fixing seat (2) symmetrically distributed in an upper and lower manner, characterized in that: A heating mold base (3), a cooling mold base (4), and an ejector mold base (5) are sequentially arranged between the lower fixed base (1) and the upper fixed base (2); a heating mold body (31) is slidably mounted on the bottom surface of the heating mold base (3); a first locking bolt (32) is spirally mounted at the center of one side of the heating mold base (3); a cooling mold body (41) matching the specifications of the heating mold body (31) is slidably mounted on the top surface of the cooling mold base (4); a second locking bolt (32) is spirally mounted at the center of one side of the cooling mold base (4). 42), an ejector mold body (51) matching the specifications of the cooling mold body (41) is slidably mounted on the top surface of the ejector mold base (5), a third locking bolt (52) is spirally mounted at the center of one side of the ejector mold base (5), and a limit assembly rod (6) is installed through the four corners between the lower fixed base (1) and the upper fixed base (2), and a limit seat (61) is fixedly installed at the upper and lower ends of the limit assembly rod (6), and a matching positioning pin (62) is installed through the interior of the limit seat (61).

2. A pneumatic prefilled syringe outer needle cap heat flanging device according to claim 1, characterized in that: The limiting assembly rods (6) near the four corners between the lower fixing seat (1) and the upper fixing seat (2) sequentially penetrate the heating mold seat (3), the cooling mold seat (4) and the ejection mold seat (5) near the four corners; the limiting assembly rods (6) are slidably connected to the heating mold seat (3) and the ejection mold seat (5); and the limiting assembly rods (6) are fixedly connected to the cooling mold seat (4).

3. A pneumatic prefilled syringe outer needle cap heat flanging device according to claim 1, characterized in that: A resistance heating structure is embedded in the interior of the heating mold body (31), and the resistance heating structure is electrically connected to an external fixed power supply. An annular circulating cooling cavity is provided inside the cooling mold body (41), and the annular circulating cooling cavity is connected to a refrigeration water tank via a circulating water path. A movable notch is provided inside the cooling mold base (4) near the bottom surface of the cooling mold body (41).

4. A pneumatic prefilled syringe outer needle cap heat flanging device according to claim 1, characterized in that: A syringe outer needle cap embedded block (311) is fixedly mounted on the bottom surface of the heating mold body (31); the heating mold body (31) is provided with different specifications, and the number of groups of syringe outer needle cap embedded blocks (311) on the bottom surface of each specification of the heating mold body (31) is different; a syringe outer needle cap groove (411) corresponding to the syringe outer needle cap embedded block (311) is penetrated through the interior of the cooling mold body (41) that matches the specifications of the heating mold body (31); and a top seat (511) corresponding to the syringe outer needle cap groove (411) is fixedly mounted on the top surface of the ejection mold body (51) that matches the specifications of the cooling mold body (41).

5. The device for thermally flanging the outer needle cap of a pneumatic prefilled syringe according to claim 1, characterized in that: The heating mold body (31), the cooling mold body (41), and the ejection mold body (51) are respectively fixedly mounted with a first insulating handle (312), a second insulating handle (412), and a third insulating handle (512) on the same side, and both ends of the heating mold body (31), the cooling mold body (41), and the ejection mold body (51) are provided with a convex block design.

6. A pneumatic prefilled syringe outer needle cap heat flanging device according to claim 1, characterized in that: The ejector mold base (5) is movably mounted on the top surface of the lower fixed base (1) via a first pneumatic telescopic mechanism (11), and support feet (12) are fixedly mounted on all four sides of the bottom of the lower fixed base (1). The heating mold base (3) is movably mounted on the bottom surface of the upper fixed base (2) via a second pneumatic telescopic mechanism (21).

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