A cartridge forming die

Abstract

The utility model belongs to the technical field of forming die, disclose a kind of medicine column forming die, including the inner die core, ejector rod and mould frame that are sequentially sleeved from inside to outside, and the end surface between the end surface of inner die core and mould frame and ejector rod has difference, so that the end surface of ejector rod, the outer wall of inner die core and the inner wall of mould frame are enclosed to form the cavity containing medicine powder, and the inner die core and mould frame can be relatively moved along the axial direction of ejector rod.The die structure of the application can cooperate with presser plate and stripper head to realize automatic medicine column forming and stripping work respectively, so as to improve production efficiency while avoiding the problem of production safety hazard.

Description

Technical Field

[0001] This utility model belongs to the field of molding die technology, and in particular relates to a pill pellet molding die. Background Technology

[0002] The explosive charge used in the aerospace field is a hollow cylindrical product with an outer diameter of 10-20 mm, an inner diameter of 5-10 mm, and a height of 5-15 mm. The material is a mixed powder, which belongs to the category of dangerous pyrotechnic products. Due to the small size of the product, the product molding and demolding are relatively troublesome. In the existing molding process, the molding and demolding processes are separated. In particular, the demolding process still requires manual operation of a specially made demolding tool, which poses safety hazards and leads to low production efficiency. Utility Model Content

[0003] This application proposes a propellant pellet forming mold to address the aforementioned technical problems. The specific technical solution is as follows: A pharmaceutical powder forming mold includes an inner mold core, a push rod, and a mold frame arranged sequentially from the inside to the outside. The end faces of the inner mold core and the mold frame are positioned relative to the end faces of the push rod, so that the end face of the push rod, the outer wall of the inner mold core, and the inner wall of the mold frame enclose a cavity for containing pharmaceutical powder. The inner mold core and the mold frame are movable relative to the push rod along the axial direction of the push rod.

[0004] Furthermore, a spring is provided at the end of the inner mold core, and the elastic force of the spring is used to maintain the positional difference between the end face of the inner mold core and the end face of the ejector pin. And / or a spring is provided at the end of the mold frame, the elastic force of the spring being used to maintain the positional difference between the end face of the mold frame and the end face of the push rod.

[0005] Furthermore, the inner mold core and the mold frame are fixed relative to each other so that they move synchronously along the axial direction of the push rod, and the end faces of the inner mold core and the mold frame are flush.

[0006] Furthermore, the inner mold core has a pin hole one, the mold frame has a pin hole two, the ejector pin has a strip-shaped hole, and a sliding limiting pin is provided in the strip-shaped hole. The two ends of the limiting pin are respectively fixed in the pin hole one and the pin hole two.

[0007] Furthermore, the outer wall of the mold frame has a protrusion.

[0008] Furthermore, there is a positional difference between the protrusion and the end face of the mold frame.

[0009] Furthermore, it also includes a guide sleeve, which is fitted onto the outside of the mold frame, and the push rod is fixed inside the guide sleeve.

[0010] Furthermore, it also includes a base, on which the sleeve is fixed.

[0011] The beneficial effects of this utility model are as follows: The mold structure of this application can be used with a press platen and a demolding head to achieve automated drug pellet forming and demolding, thereby improving production efficiency and avoiding production safety hazards. More specifically, the ejector pin, inner mold core and mold frame form a cavity to contain the drug powder, and the press platen applies pressure to the inner mold core and mold frame to reduce the volume of the cavity, thereby compacting the drug powder to obtain drug pellets. By changing the press with a demolding head, pressure is applied to the inner mold core or mold frame until the cavity disappears, and the drug pellet is completely detached to achieve demolding. Attached Figure Description

[0012] Figure 1 The diagram shown is a structural schematic of a pill pellet forming mold; Figure 2 The diagram shown is an exploded view of the propellant cartridge molding die; Figure 3 The diagram shown is an internal schematic of the medicament pellet forming mold. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0014] Figure 1 The diagram shown is a structural schematic of a pill pellet forming mold. Figure 2 The diagram shown is an exploded view of the propellant cartridge molding die. Figure 3 The diagram shows the internal structure of a pill-forming mold. The mold includes an inner core 1, a mold frame 2, and a push rod 3. The inner core 1, push rod 3, and mold frame 2 are arranged sequentially from the inside to the outside. The end face of the push rod 3, the outer wall of the inner core 1, and the inner wall of the mold frame 2 form a cavity 10 to accommodate the pill powder. Through the relative movement of the inner core 1, mold frame 2, and push rod 3, the pill powder is compacted into a hollow cylindrical pill, and the pill is demolded after molding.

[0015] In this application, after the powder is filled into the cavity 10, the ejector pin 3 is fixed. The press platen is used to press the inner mold core 1 and the mold frame 2 against the ejector pin 3 at the same time, so that the height of the cavity 10 gradually decreases until the powder in the cavity 10 is compacted. Then the press platen stops moving. Then the press platen is lifted and the demolding head is replaced to apply pressure to the mold frame 2, so that the mold frame 2 moves a greater distance towards the ejector pin 3, thereby exposing the compacted powder column.

[0016] In one embodiment, the end faces of the inner mold core 1 and the mold frame 2 are flush, and the side walls of the inner mold core 1, the mold frame 2 and the ejector pin 3 are tightly fitted and can slide relative to each other to cooperate with the press plate to form the drug cartridge.

[0017] In one embodiment, the inner mold core 1 and the mold frame 2 are fixed to each other, so that after the press plate applies pressure to the inner mold core 1 or the mold frame 2, the two simultaneously adhere to the press plate and move towards the ejector rod 3 with the press plate; more importantly, during the demolding process, after the demolding head applies pressure to the mold frame 2 or the inner mold core 1, the mold frame 2 and the inner mold core 1 can be detached from the medicated column at the same time, thereby better achieving the demolding purpose.

[0018] See Figure 2 and Figure 3 The inner mold core 1 and the mold frame 2 are fixed by a limiting pin 6. More specifically, the inner mold core 1 has a pin hole 11, the mold frame 2 has a pin hole 21, and the ejector rod 3 has a strip hole 31. The limiting pin 6 passes through the pin hole 21, the strip hole 31, and the pin hole 11 in sequence, thereby fixing the inner mold core 1 and the mold frame 2, and at the same time maintaining the axial movement of the inner mold core 1 and the mold frame 2 relative to the ejector rod 3. In essence, the limiting pin 6 slides in the strip hole 31.

[0019] The aforementioned pin hole 11 can be either a through hole penetrating the inner mold core 1 or a blind hole that does not penetrate the inner mold core 1, while pin hole 21 should be a through hole penetrating the side wall of the mold frame 2. Furthermore, pin hole 11, pin hole 21, and the limiting pin 6 have the same cross-section to facilitate the installation and fixation of the limiting pin 6.

[0020] In one embodiment, the end of the limiting pin 6 and the pin hole 11 are fixed to each other by interference fit; in another embodiment, the end of the limiting pin 6 and the pin hole 11 are fixed to each other by an external medium, such as an adhesive; in yet another embodiment, the end of the limiting pin 6 and the pin hole 11 are fixed to each other by a fastening structure, such as a threaded connection or a snap-fit.

[0021] In this application, a spring 5 is also provided to maintain the maximum height of the cavity 10, thereby ensuring the filling amount of the medicine powder. More specifically, the spring 5 is provided at the end of the mold frame 2. The elastic force of the spring 5 pushes the mold frame 2 out. The direction of the elastic force of the spring 5 is opposite to the pressing and forming direction of the press plate. Under the action of the spring 5, the cavity 10 can maintain the state of receiving medicine powder, and after the medicine column is formed and demolded, a force is applied to the mold frame 2 to reset it.

[0022] In another embodiment, since the center of the ejector rod 3 needs to accommodate the inner mold core 1 and allow the inner mold core 1 to move along the axis of the ejector rod 3, the ejector rod 3 is configured as a hollow rod, and the spring 5 is disposed at the center of the ejector rod 3 to abut against the inner mold core 1, in order to maintain the maximum height of the cavity 10.

[0023] See Figure 3The outer wall of the mold frame 2 has a protrusion 22. Since the demolding head cannot act on the drug column, the demolding head should be provided with a hollow part, and the inner diameter of the hollow part should be at least greater than or equal to the outer diameter of the drug column. The protrusion 22 can increase the contact area with the demolding head without increasing the thickness of the main body of the mold frame 2, which is more conducive to ensuring the stability of the demolding process of the demolding head.

[0024] Furthermore, if the demolding head partially overlaps with the cavity 10 during the movement before demolding, it will cause the drug column to be squeezed during demolding, thereby damaging the already formed drug column. Therefore, in this application, a positional difference is formed between the protrusion 22 and the end face of the mold frame 2, that is, the end face of the protrusion 22 and the end face of the mold frame 2 are not coplanar. The purpose is to achieve demolding only by the protrusion 22 contacting and cooperating with the demolding head. This can avoid the problem of squeezing the drug column during demolding due to the positional deviation of the demolding head, thereby damaging the already formed drug column.

[0025] In one embodiment, a guide sleeve 4 is also provided. The guide sleeve 4 is sleeved on the outside of the mold frame 2 and can move relative to the mold frame 2. The guide sleeve 4 can maintain the stability of the mold frame 2 and the inner mold core 1 during the molding process. On the other hand, the ejector rod 3 is fixed inside the guide sleeve 4. The guide sleeve 4 and the ejector rod 3 are fixed relative to each other. Therefore, the guide sleeve 4 restricts the extreme position of the movement of the mold frame 2 and the inner mold core 1 during the molding process of the medicated column, that is, it restricts the extreme compression length of the spring 5, avoids excessive fatigue of the spring 5, and provides a certain degree of protection for the spring 5.

[0026] In one embodiment, a base 7 is also provided, and the guide sleeve 4 can be fixed on the base 7.

[0027] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A die for forming medicinal pellets, characterized in that, It includes an inner mold core, an ejector pin, and a mold frame, which are nested from the inside out. The end faces of the inner mold core and the mold frame are positioned relative to the end face of the ejector pin, so that the end face of the ejector pin, the outer wall of the inner mold core, and the inner wall of the mold frame enclose a cavity for containing the powder. The inner mold core and the mold frame can move relative to the ejector pin along the axial direction of the ejector pin.

2. The dummy pellet forming mold according to claim 1, characterized in that, A spring is provided at the end of the inner mold core, and the elastic force of the spring is used to maintain the positional difference between the end face of the inner mold core and the end face of the ejector pin. And / or a spring is provided at the end of the mold frame, the elastic force of the spring being used to maintain the positional difference between the end face of the mold frame and the end face of the push rod.

3. The dummy pellet forming mold according to claim 1, characterized in that, The inner mold core and the mold frame are fixed relative to each other so that they move synchronously along the axial direction of the push rod, and the end faces of the inner mold core and the mold frame are flush.

4. The dummy pellet forming mold according to claim 3, characterized in that, The inner mold core has a pin hole one, the mold frame has a pin hole two, the ejector pin has a strip-shaped hole, and a sliding limiting pin is provided in the strip-shaped hole. The two ends of the limiting pin are respectively fixed in the pin hole one and the pin hole two.

5. The dummy pellet forming mold according to claim 1, characterized in that, The outer wall of the mold frame has a protrusion.

6. The dummy pellet forming mold according to claim 5, characterized in that, There is a positional difference between the protrusion and the end face of the mold frame.

7. The dummy pellet forming mold according to claim 1, characterized in that, It also includes a guide sleeve, which is fitted on the outside of the mold frame, and the push rod is fixed inside the guide sleeve.

8. A pill pellet forming mold according to claim 7, characterized in that, It also includes a base, and the sleeve is fixed to the base.

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