Soft capsule production mold

Abstract

The utility model discloses a soft capsule production mold, and belongs to the technical field of soft capsule production. A soft capsule production mold comprises two mold cylinders symmetrically arranged on a rack, a plurality of mold cavity sets distributed in an annular array mode are arranged on the outer surfaces of the mold cylinders, and each mold cavity set comprises a plurality of mold cavities linearly distributed in the axial direction of the corresponding mold cylinder. Pneumatic assemblies which are the same as the mold cavity groups in group number and are in one-to-one correspondence with the mold cavity groups are arranged in the mold cylinder, an air communication pipeline is connected between each pneumatic assembly and the mold cavity in the corresponding mold cavity group, and a driving assembly is further arranged in the mold cylinder; according to the utility model, excessive extrusion on materials during molding can be effectively prevented during mold closing, so that the materials are prevented from overflowing, the waste of the materials is avoided, the yield of production is improved to a certain extent, demolding can be assisted by air flow, the soft capsules cannot be damaged in the demolding process, and the production efficiency is improved. And the processing quality of the product is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of soft capsule production technology, and in particular to a soft capsule production mold. Background Technology

[0002] Soft capsules, also known as capsules, are a type of capsule packaging commonly found in pharmaceuticals and health foods. They are capsules made by sealing liquid or liquid-solid drugs within a soft capsule material. The soft capsule material is made alone or in combination with capsule gelatin, glycerin, or other suitable pharmaceutical excipients.

[0003] The production of soft capsule products is carried out entirely using a roller press. The production principle of the roller press is to inject material into the mold cavity by rotating the mold and extruding it at the same time using a syringe. While the material is being injected into the syringe, the syringe is heated, which causes the soft capsule skin to stick together during rotation, forming a complete soft capsule.

[0004] However, when the mold compresses the soft capsules, the rubber sheets on both sides will squeeze the material injected between the rubber sheets. When the squeezing pressure is too high, some material will overflow. This will not only waste material, but also affect the yield rate of production. Moreover, after the soft capsules are compressed, in order to help the soft capsules detach from the mold cavity, some molds use ejector pins to eject the soft capsules from the mold cavity. However, at this time, the soft capsules have just been formed and have not yet cooled down, and their strength has not yet reached a certain standard. If they are forcibly ejected at this time, it will easily damage the outer surface of the capsule, or even break the entire soft capsule, causing material leakage and affecting the quality of the product. Utility Model Content

[0005] The purpose of this invention is to solve the problems of material leakage during the extrusion molding of soft capsules and the potential damage to the soft capsules during ejection by the ejector pin in the prior art, and to propose a soft capsule production mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A soft capsule production mold includes two mold cylinders symmetrically arranged on a frame. The outer surface of the mold cylinder is provided with several groups of mold cavities arranged in a ring array. Each mold cavity group includes several mold cavities linearly distributed along the axial direction of the mold cylinder. The interior of the mold cylinder is provided with pneumatic components that correspond one-to-one with the number of mold cavity groups. Each pneumatic component is connected to an air communication pipe between itself and the mold cavity in its corresponding mold cavity group. The interior of the mold cylinder is also provided with a drive component for driving the pneumatic components to evacuate or inflate the mold cavity.

[0008] In some embodiments, the pneumatic assembly includes an air cylinder, a piston, and a piston rod. The air cylinder is connected to the mold cylinder, the piston is slidably connected to the inside of the air cylinder, and one end of the piston rod is connected to the piston, while the other end extends to the outside of the air cylinder.

[0009] In some embodiments, the drive assembly includes wheels and a rod-shaped first extrusion member. The wheels are a plurality of each located at the outer end of a plurality of piston rods. The first extrusion member is perpendicular to the axial direction of the mold cylinder and is located outside the plurality of wheels. The first extrusion member is connected to the frame.

[0010] In some embodiments, the first extruder is located near the closest point between the two mold cylinders, and the rod-shaped first extruder is inclined from the outside to the inside along the rotation direction of the mold cylinder, for pushing the wheel in contact with it to slide a certain distance from the outside to the inside along the radial direction of the mold cylinder.

[0011] In some embodiments, the drive assembly further includes a rod-shaped second extruder, which is perpendicular to the axial direction of the die cylinder and located inside a plurality of wheels, and the second extruder is connected to the frame.

[0012] In some embodiments, the second extruder is disposed opposite to the first extruder, and the inclination direction of the rod-shaped second extruder is opposite to the inclination direction of the first extruder, for pushing the wheel in contact with it to slide a certain distance from the inside to the outside along the radial direction of the mold cylinder.

[0013] Compared with the prior art, the present invention provides a soft capsule production mold, which has the following beneficial effects.

[0014] 1. This utility model, through the cooperation of the pneumatic component and the first extrusion component, will apply negative pressure to the mold cavity during mold closing to assist the rubber sheets on both sides to deform inward into the mold cavity. This will create a certain cavity in the middle of the rubber sheets during the extrusion and merging process. This cavity not only facilitates the injection of materials, but also effectively prevents excessive pressure on the materials when extruding the rubber sheets, thereby preventing material overflow, avoiding material waste, and improving the yield rate of production to a certain extent.

[0015] 2. This utility model, through the cooperation of the pneumatic component and the second extruder, can inflate the mold cavity that needs to be demolded during the mold opening process. At this time, the soft capsule remaining in the mold cavity will be detached from the mold cavity under the impact of the airflow, thereby achieving the purpose of assisting demolding. Moreover, since demolding is carried out by airflow, the soft capsule will not be damaged during the demolding process, thereby improving the protection of the soft capsule, avoiding scratches on its outer surface, and preventing the entire soft capsule from being broken and causing material leakage, thus ensuring the processing quality of the product.

[0016] 3. Furthermore, during the mold closing and degassing processes, airflow is generated directly by the movement of the mold cylinder in conjunction with the pneumatic components, air communication pipes, and drive components, without the need for an additional air source. Therefore, this can play a positive role in controlling processing costs.

[0017] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0018] Figure 1 This is a frontal three-dimensional structural diagram of the mold cylinder.

[0019] Figure 2 This is a rear-view three-dimensional structural diagram of the mold cylinder.

[0020] Figure 3 This is a schematic diagram of a partial cross-sectional view of the two mold cylinders.

[0021] Figure 4 This is a side sectional view of the mold cylinder.

[0022] Figure 5 This is a partial sectional view of the side structure of this pneumatic component.

[0023] Figure 6 This is a frontal three-dimensional structural diagram of the present invention.

[0024] In the picture:

[0025] 1. Mold cylinder; 101. Mold cavity; 2. Pneumatic assembly; 201. Air cylinder; 202. Piston; 203. Piston rod; 204. Guide sleeve; 3. Air connecting pipe; 301. Main air supply pipe; 302. Secondary air supply pipe; 303. Connecting hole; 4. Wheel; 5. First extrusion component; 6. Second extrusion component; 7. Fixing frame; 8. Central shaft; 9. Frame. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Reference Figure 1-3A soft capsule production mold includes two mold cylinders 1 symmetrically arranged on a frame 9. A central shaft 8 is installed at the axis of the mold cylinder 1 for connection to the frame 9. The outer surface of the mold cylinder 1 is provided with several sets of mold cavity groups arranged in a ring array. Each mold cavity group includes several mold cavities 101 linearly distributed along the axial direction of the mold cylinder 1. The interior of the mold cylinder 1 is provided with pneumatic components 2 that are the same number as the number of mold cavity groups and correspond one-to-one. Each pneumatic component 2 is connected to an air communication pipe 3 between itself and the mold cavity 101 in the corresponding mold cavity group. The interior of the mold cylinder 1 is also provided with a drive component. The drive component can drive each pneumatic component 2 in sequence and, during the process of the two mold cylinders 1 closing the rubber, evacuate the mold cavity 101 to assist in mold closing. After mold closing, the drive component 2 can be driven to inflate the mold cavity 101 to assist in demolding.

[0028] Reference Figure 3-4 The pneumatic component 2 includes an air cylinder 201, a piston 202, and a piston rod 203. The air cylinder 201 is connected to the mold cylinder 1. The piston 202 is slidably connected to the inside of the air cylinder 201. One end of the piston rod 203 is connected to the piston 202, and the other end extends to the outside of the air cylinder 201. The drive component can push or pull the piston 202 to slide inside the air cylinder 201 through the piston rod 203, thereby realizing the pumping or inflation of the mold cavity 101.

[0029] Reference Figure 1-3 The drive assembly includes wheels 4 and rod-shaped first extrusion member 5. There are several wheels 4, which are respectively located at the outer ends of several piston rods 203. The first extrusion member 5 is perpendicular to the axis of the mold cylinder 1 and is located outside the several wheels 4. The first extrusion member 5 is connected to the frame 9.

[0030] The first extrusion member 5 is located at the closest point between the two mold cylinders 1, and the rod-shaped first extrusion member 5 is inclined from the outside to the inside along the rotation direction of the mold cylinder 1. It is used to push the wheel 4 in contact with it to slide a certain distance from the outside to the inside along the radial direction of the mold cylinder 1. Thus, the wheel 4 pulls the piston rod 203 and the piston 202 to slide in the air cylinder 201 and evacuate the inside of the mold cavity 101.

[0031] The drive assembly also includes a second extrusion member 6, which is perpendicular to the axis of the mold cylinder 1 and located inside several wheels 4. The second extrusion member 6 is arranged opposite to the first extrusion member 5, and the inclination direction of the rod-shaped second extrusion member 6 is opposite to that of the first extrusion member 5. It is used to push the wheels 4 in contact with it to slide a certain distance from the inside to the outside along the radial direction of the mold cylinder 1, thereby pushing the piston rod 203 and the pulling piston 202 to slide in the air cylinder 201 through the wheels 4, and inflating the inside of the mold cavity 101.

[0032] The first extrusion piece 5 and the second extrusion piece 6 are respectively fixed on the frame 9 by the fixing bracket 7, and extend towards the mold cylinder 1 to a position close to the wheel 4.

[0033] Reference Figure 3-4 The air connection pipe 3 includes an air delivery main pipe 301 and an air delivery secondary pipe 302. The air delivery main pipe 301 is internally connected to the air cylinder 201. The number of air delivery secondary pipes 302 is the same as the number of mold cavities 101 in the mold cavity group. A connecting hole 303 is provided between each of the several air delivery secondary pipes 302 and the several mold cavities 101. The air delivery secondary pipes 302 are connected to the air delivery main pipe 301.

[0034] A guide sleeve 204 is connected to the air cylinder 201, and the piston rod 203 is slidably connected to the guide sleeve 204 to guide the sliding of the piston rod 203, ensuring that it slides in a straight line, thereby improving its stability during the sliding process.

[0035] In this utility model, such as Figure 6 As shown, two mold cylinders 1 are symmetrically mounted on the frame 9. During production, the two mold cylinders 1 rotate at the same speed but in opposite directions under the drive of an external drive device (not shown in the diagram). The direction of rotation is referenced... Figure 3 The middle arrow indicates the direction, and the mold cavities on the two mold cylinders 1 move closer to each other in sequence under the rotation and achieve the mold closing action. During this process, the two rubber sheets pass through the two mold cylinders 1 in a symmetrical state under the drive of the external conveying and traction equipment. At the same time, the external injection equipment injects the material into the space between the two rubber sheets before the mold closes. As the two mold cylinders 1 rotate, they can cooperate with the two close-to-each mold cavity assemblies to extrude and mold the two rubber sheets into soft capsules.

[0036] As the two mold cavities approach each other and are about to close, the corresponding pneumatic components 2 and mold cylinder 1 move synchronously and approach the first extruder 5. When the wheel 4 contacts the inclined first extruder 5, under the extrusion restriction of the first extruder 5, the wheel 4 will be pushed towards the axis of the mold cylinder 1, thereby pulling the piston rod 203 and piston 202 to slide in the air cylinder 201 and generate negative pressure in the air cylinder 201. Therefore, the air cylinder 201 can sequentially pump air into the mold cavity 101 to be closed through the air delivery main pipe 301, the air delivery secondary pipe 302 and the connecting hole 303. At this time, the rubber has been sealed at the opening of the mold cavity 101. Therefore, the inflation can generate negative pressure in the mold cavity 101. The negative pressure suction can cause the heated and softened rubber to be recessed into the mold cavity 101. At the same time, the external injection device injects the material into the recess of the rubber. As the two mold cylinders 1 rotate, the rubber is squeezed and formed into a soft capsule.

[0037] As can be seen from the above, the negative pressure suction process helps the rubber sheets on both sides to deform into the mold cavity 101, so that a certain cavity is formed in the middle of the rubber sheets on both sides during the extrusion and merging process. This cavity not only facilitates the injection of materials, but also effectively prevents excessive pressure on the materials when the rubber sheets are extruded, thereby preventing the materials from overflowing.

[0038] The extruded soft capsule continues to move downward as the mold cylinder 1 rotates and the mold is opened. During this process, the wheel 4, which was previously pushed by the first extruder 5, will contact the inclined second extruder 6 again and move back to its original position under the extrusion restriction of the second extruder 6. This will push the piston rod 203 and piston 202 to reset. In this way, the air is sequentially supplied to the mold cavity 101 that needs to be demolded through the main air supply pipe 301, the secondary air supply pipe 302 and the connecting hole 303. At this time, the soft capsule remaining in the mold cavity 101 is detached from the mold cavity 101 under the impact of the airflow, thereby achieving the purpose of assisting demolding. Moreover, since demolding is carried out by airflow, the soft capsule will not be damaged during the demolding process, thereby improving the protection of the soft capsule.

[0039] Furthermore, during the aforementioned mold closing and air extraction and demolding inflation processes, airflow is generated directly by the movement of the mold cylinder 1 in conjunction with the pneumatic components 2, air connecting pipes 3, and drive components, without the need for an additional air source. Therefore, this can play a positive role in controlling processing costs.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A soft capsule production mold, comprising two mold cylinders (1) symmetrically arranged on a frame (9), characterized in that, The outer surface of the mold cylinder (1) is provided with several sets of mold cavity groups arranged in a ring array. Each mold cavity group includes several mold cavities (101) linearly distributed along the axial direction of the mold cylinder (1). The interior of the mold cylinder (1) is provided with pneumatic components (2) that are the same number as the number of mold cavity groups and correspond one-to-one. Each pneumatic component (2) is connected to an air communication pipe (3) between it and the mold cavity (101) in the corresponding mold cavity group. The interior of the mold cylinder (1) is also provided with a driving component for driving the pneumatic component (2) to pump or inflate the mold cavity (101).

2. The soft capsule production mold according to claim 1, characterized in that, The pneumatic assembly (2) includes an air cylinder (201), a piston (202) and a piston rod (203). The air cylinder (201) is connected to the mold cylinder (1), the piston (202) is slidably connected to the inside of the air cylinder (201), and one end of the piston rod (203) is connected to the piston (202), while the other end extends to the outside of the air cylinder (201).

3. A soft capsule production mold according to claim 2, characterized in that, The drive assembly includes wheels (4) and a rod-shaped first extruder (5). There are several wheels (4) and they are respectively located at the outer ends of several piston rods (203). The first extruder (5) is perpendicular to the axis of the mold cylinder (1) and located outside the several wheels (4). The first extruder (5) is connected to the frame (9).

4. A soft capsule production mold according to claim 3, characterized in that, The first extrusion member (5) is located close to the nearest point between the two mold cylinders (1), and the rod-shaped first extrusion member (5) is inclined from the outside to the inside along the rotation direction of the mold cylinder (1) to push the wheel (4) in contact with it to slide a certain distance from the outside to the inside along the radial direction of the mold cylinder (1).

5. A soft capsule production mold according to claim 4, characterized in that, The drive assembly also includes a rod-shaped second extruder (6), which is perpendicular to the axis of the mold cylinder (1) and located inside several wheels (4), and the second extruder (6) is connected to the frame (9).

6. A soft capsule production mold according to claim 5, characterized in that, The second extruder (6) is arranged opposite to the first extruder (5), and the inclination direction of the rod-shaped second extruder (6) is opposite to the inclination direction of the first extruder (5), which is used to push the wheel (4) in contact with it to slide a certain distance from the inside to the outside along the radial direction of the mold cylinder (1).

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