Medical rubber plug production mold with good sealing performance

Abstract

The utility model discloses a medical rubber plug production mould with good leakproofness, which comprises an upper mould base and a lower mould base, the top end of the lower mould base is provided with a plurality of mould cavities, top blocks are inserted into the mould cavities, the bottom ends of the top blocks are fixedly connected with connecting columns, the bottom ends of the connecting columns penetrate through the inner bottom surfaces of the mould cavities, and the bottom ends of the connecting columns penetrate through the inner bottom surfaces of the mould cavities. A driven plate is slidably connected into the lower die base. The pull rod is driven to move together in the separation process of the upper die base and the lower die base, and the pull rod drives the driven plate to move upwards in the lower die base through the sliding rod in the moving process. In the moving process of the driven plate, the driven plate gradually makes contact with the bottom end of the connecting column, the ejector block connected with the connecting column moves in the mold cavity under the pulling force effect of the upper mold base, the rubber plug obtained after injection molding is completed is ejected out, rapid discharging of the rubber plug is achieved, the structure is simple, operation is convenient, and the production efficiency of the rubber plug is improved.

Description

Technical Field

[0001] This utility model relates to the field of rubber stopper production technology, specifically to a medical rubber stopper production mold with good sealing performance. Background Technology

[0002] Medical rubber stoppers are sealing components used in pharmaceutical packaging (such as infusion bottles, oral liquid bottles, injection bottles, etc.) or medical devices (such as syringes, filling devices, etc.). Their main function is to prevent leakage of liquids or gases and ensure the stability and safety of drugs. In the production process of rubber stoppers, they are usually injection molded in molds.

[0003] Currently, most medical rubber stoppers are produced in molds and then need to be removed one by one by workers from the mold cavity. This process takes a lot of time and reduces the production efficiency of rubber stoppers. Utility Model Content

[0004] The purpose of this invention is to provide a medical rubber stopper production mold with good sealing performance to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a medical rubber stopper production mold with good sealing performance, comprising an upper mold base and a lower mold base. The lower mold base has multiple mold cavities at its top end, and each of the multiple mold cavities has a top block inserted inside. Each of the multiple top blocks has a connecting column fixedly connected to its bottom end, and the bottom end of each connecting column penetrates the bottom surface inside the multiple mold cavities. A driven plate is slidably connected inside the lower mold base, and mating blocks are fixedly connected to both sides of the driven plate. Each of the two mating blocks has a pull rod slidably arranged on one side, and the inner sides of the two pull rods are fixedly connected to both sides of the upper mold base.

[0006] As a further preferred embodiment of this technical solution, the bottom end of the upper mold base is fixedly connected to multiple injection ports, and a sealing ring is fixedly connected to the bottom end of the upper mold base at the multiple injection port positions. A sealing groove is opened at the top end of the lower mold base at the multiple mold cavity positions, and the bottom ends of the multiple sealing rings are respectively inserted into the interior of the multiple sealing grooves.

[0007] As a further preferred embodiment of this technical solution, positioning posts are fixedly connected to the bottom of the upper mold base near the four corners, and positioning grooves are opened on the top of the lower mold base near the four corners. The bottom ends of the four positioning posts are respectively inserted into the four positioning grooves.

[0008] As a further preferred embodiment of this technical solution, four limiting rods are fixedly connected to the top surface inside the lower mold base. The interior of the driven plate is slidably connected to the outer surfaces of the four limiting rods. A second return spring is sleeved on the outer surface of each of the four limiting rods. The bottom and top ends of the four second return springs respectively abut against the top end of the driven plate and the top end inside the lower mold base.

[0009] As a further preferred embodiment of this technical solution, a first reset spring is sleeved on the outer surface of each of the multiple connecting columns, the top ends of the multiple first reset springs are fixedly connected to the inner top end of the lower mold base, and the bottom ends of the multiple first reset springs respectively abut against the bottom ends of the multiple connecting columns.

[0010] As a further preferred embodiment of this technical solution, each of the two docking blocks is fixedly connected to a sliding rod on one side, and each of the two pull rods is provided with a sliding through hole on one side, with the outer surfaces of the two sliding rods respectively slidably connected to the interior of the two sliding through holes.

[0011] This utility model provides a medical rubber stopper production mold with good sealing performance, which has the following beneficial effects:

[0012] (1) This utility model drives the pull rod to move together during the separation of the upper mold base and the lower mold base. During the movement, the pull rod drives the driven plate to move upward inside the lower mold base through the slide rod. During the movement of the driven plate, it gradually contacts the bottom end of the connecting column and moves the top block connected to the connecting column in the mold cavity under the pulling force of the upper mold base, thus ejecting the rubber plug after injection molding. This achieves rapid unloading of the rubber plug. The structure is simple, the operation is convenient, and the production efficiency of the rubber plug is improved.

[0013] (2) This utility model can seal the mold cavity and the injection port by means of the sealing ring and the sealing groove, effectively preventing the amount of raw material flowing out during the injection process, reducing material loss and improving resource utilization. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the upper mold base and lower mold base when unfolded.

[0016] Figure 3 This is a schematic diagram of the internal structure of the lower mold base of this utility model;

[0017] Figure 4 This is a schematic diagram of the upper mold base structure of this utility model.

[0018] In the diagram: 1. Lower mold base; 2. Upper mold base; 3. Mold cavity; 4. Tie rod; 5. Follower plate; 6. Connecting block; 7. Sliding through hole; 8. Slide rod; 9. Ejector block; 10. Connecting post; 11. No. 1 return spring; 12. Sealing groove; 13. Sealing ring; 14. Injection port; 15. Positioning post; 16. Positioning groove; 17. Limiting rod; 18. No. 2 return spring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] This utility model provides a technical solution: such as Figure 1-3 As shown in this embodiment, a medical rubber stopper production mold with good sealing performance includes an upper mold base 2 and a lower mold base 1. The lower mold base 1 has multiple mold cavities 3 at its top end. Each of the multiple mold cavities 3 has a top block 9 inserted inside. Each of the multiple top blocks 9 has a connecting column 10 fixedly connected to its bottom end. The bottom end of each connecting column 10 penetrates the bottom surface inside the multiple mold cavities 3. A driven plate 5 is slidably connected inside the lower mold base 1. A mating block 6 is fixedly connected to both sides of the driven plate 5. A pull rod 4 is slidably arranged on one side of each of the two mating blocks 6. The inner sides of the two pull rods 4 are fixedly connected to both sides of the upper mold base 2. The top blocks 9 can push the material in the mold cavity 3 outward to achieve the feeding effect. The driven plate 5 can apply an upward pushing force to the connecting column 10, so that the top block 9 can push out the rubber stopper. The pull rods 4 can pull the driven plate 5 to move during the movement of the upper mold base 2 to achieve the deceleration effect.

[0021] like Figure 2 and Figure 4 As shown, the bottom end of the upper mold base 2 is fixedly connected to multiple injection ports 14. A sealing ring 13 is fixedly connected to the bottom end of the upper mold base 2 at the position of the multiple injection ports 14. A sealing groove 12 is opened at the top end of the lower mold base 1 at the position of multiple mold cavities 3. The bottom ends of the multiple sealing rings 13 are respectively inserted into the interior of the multiple sealing grooves 12. By setting the sealing rings 13 and sealing grooves 12, the injection position can be sealed to prevent excessive material overflow during the production of rubber stoppers and reduce the loss of raw materials.

[0022] like Figure 2 and Figure 4 As shown, positioning posts 15 are fixedly connected to the bottom of the upper mold base 2 and near the four corners, and positioning grooves 16 are opened at the top of the lower mold base 1 and near the four corners. The bottom ends of the four positioning posts 15 are respectively inserted into the four positioning grooves 16. By setting the positioning posts 15 and positioning grooves 16, the upper mold base 2 and the lower mold base 1 can be positioned, so that the sealing ring 13 can be inserted into the sealing groove 12 to prevent skewing.

[0023] like Figure 2 and Figure 3 As shown, four limiting rods 17 are fixedly connected to the top surface inside the lower mold base 1. The interior of the driven plate 5 is slidably connected to the outer surface of the four limiting rods 17. A second return spring 18 is sleeved on the outer surface of each of the four limiting rods 17. The bottom and top ends of the four second return springs 18 respectively abut against the top end of the driven plate 5 and the top end inside the lower mold base 1. By setting the limiting rods 17, the driven plate 5 can be prevented from tilting during movement. By setting the second return springs 18, the driven plate 5 can be reset during injection molding.

[0024] like Figure 3 As shown, a first reset spring 11 is sleeved on the outer surface of multiple connecting posts 10. The top ends of multiple first reset springs 11 are fixedly connected to the inner top end of the lower mold base 1, and the bottom ends of multiple first reset springs 11 respectively abut against the bottom ends of multiple connecting posts 10. In this way, by setting the first reset spring 11, the connecting posts 10 can be reset, thereby enabling the top block 9 to be reset.

[0025] like Figure 3 As shown, each of the two docking blocks 6 is fixedly connected to a sliding rod 8 on one side, and each of the two pull rods 4 has a sliding through hole 7 through one side. The outer surfaces of the two sliding rods 8 are slidably connected to the inside of the two sliding through holes 7, so that the driven plate 5 can be pulled to move after the pull rod 4 moves a certain distance, so that there is a sufficient gap between the upper mold base 2 and the lower mold base 1.

[0026] This utility model provides a medical rubber stopper production mold with good sealing performance. The specific working principle is as follows:

[0027] During the production of rubber plugs, the upper mold base 2 and the lower mold base 1 are connected, the sealing ring 13 is inserted into the sealing groove 12, and then the injection port 14 extrudes the raw material to produce the sealing plug. After production is completed, the upper mold base 2 and the lower mold base 1 separate, which drives the pull rod 4 to move together. During the movement, the pull rod 4 drives the driven plate 5 to move upward inside the lower mold base 1 through the slide rod 8. During the movement of the driven plate 5, it gradually contacts the bottom end of the connecting column 10 and moves the top block 9 connected to the connecting column 10 in the mold cavity 3 under the pulling force of the upper mold base 2, thus ejecting the rubber plug after injection molding.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold for producing medical rubber stoppers with good sealing performance, comprising an upper mold base (2) and a lower mold base (1), characterized in that: The lower mold base (1) has multiple mold cavities (3) at its top. Each of the multiple mold cavities (3) has a top block (9) inserted inside. Each of the multiple top blocks (9) has a connecting column (10) fixedly connected to its bottom end. The bottom end of the connecting column (10) penetrates the bottom surface inside the multiple mold cavities (3). A driven plate (5) is slidably connected inside the lower mold base (1). A mating block (6) is fixedly connected to both sides of the driven plate (5). A pull rod (4) is slidably provided on one side of each of the two mating blocks (6). The inner sides of the two pull rods (4) are fixedly connected to both sides of the upper mold base (2).

2. The medical rubber stopper production mold with good sealing performance according to claim 1, characterized in that: The bottom end of the upper mold base (2) is fixedly connected to multiple injection ports (14). A sealing ring (13) is fixedly connected to the bottom end of the upper mold base (2) at the position of multiple injection ports (14). A sealing groove (12) is opened at the top end of the lower mold base (1) at the position of multiple mold cavities (3). The bottom ends of the multiple sealing rings (13) are respectively inserted into the interior of the multiple sealing grooves (12).

3. The medical rubber stopper production mold with good sealing performance according to claim 2, characterized in that: The upper mold base (2) is fixedly connected to the bottom end and near the four corners with positioning posts (15), and the lower mold base (1) is provided with positioning grooves (16) at the top end and near the four corners. The bottom ends of the four positioning posts (15) are respectively inserted into the four positioning grooves (16).

4. The medical rubber stopper production mold with good sealing performance according to claim 1, characterized in that: Four limiting rods (17) are fixedly connected to the top surface inside the lower mold base (1). The interior of the driven plate (5) is slidably connected to the outer surface of the four limiting rods (17). A second return spring (18) is sleeved on the outer surface of each of the four limiting rods (17). The bottom and top of the four second return springs (18) respectively abut against the top of the driven plate (5) and the top of the interior of the lower mold base (1).

5. The medical rubber stopper production mold with good sealing performance according to claim 4, characterized in that: Each of the connecting posts (10) has a first reset spring (11) sleeved on its outer surface. The top of each of the first reset springs (11) is fixedly connected to the top of the lower mold base (1). The bottom of each of the first reset springs (11) abuts against the bottom of each of the connecting posts (10).

6. The medical rubber stopper production mold with good sealing performance according to claim 1, characterized in that: Each of the two docking blocks (6) is fixedly connected to a sliding rod (8) on one side, and each of the two pull rods (4) is provided with a sliding through hole (7) on one side. The outer surfaces of the two sliding rods (8) are slidably connected to the interior of the two sliding through holes (7).

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