Blister packaging machine cooling device

Abstract

A blister packaging machine cooling device, including guide rail, milling has a serpentine groove in the bottom of the guide rail, inlay copper pipe connection cold water machine. Still including cooling cover and cooling nozzle, cooling cover is installed above the guide rail, inside passes into cooling gas. Cooling nozzle is installed at heat sealing roller and passes into cooling gas for the blister cavity about to enter heat sealing. The utility model is used for solving the problem that the seamless soft rubber pill produced by drop method overflows because the rubber is heated and soft in the blister packaging process.

Description

Technical Field

[0001] This utility model relates to the field of oral solid dosage form packaging, and more specifically to a cooling device for seamless soft capsules during blister packaging. Background Technology

[0002] In the pharmaceutical industry, the production process of soft capsules for oral solid dosage forms includes two methods: the dripping method and the compression method. The dripping method involves dripping a specific amount of gelatinous liquid and a specific amount of medication separately through the inner and outer layers of a double-layered dropper at different speeds. This allows a fixed amount of gelatinous liquid to coat a fixed amount of medication, which is then dropped into a cooling liquid to form a spherical shape and solidify upon cooling. The dripping method requires a low-temperature, low-humidity environment. During the packaging process, the heating plate of the PVC blister molding mold heats the bottom of the guide rails via thermal radiation, causing the soft capsules inside the blister packs on the guide rails to heat up. Simultaneously, the guide rails are not sealed and are in direct contact with the environment. During the heat sealing process of the blister packaging machine, heat-sealing rollers heat the aluminum-plastic composite film to a certain temperature, and then, under pressure, tightly bond the PVC sheet and aluminum foil to form a strong seal. All of these factors contribute to the increased temperature of the soft capsules, softening the outer shell. Ultimately, during the sealing process, the pressure of the internal filler causes the outer shell to rupture, leading to the overflow of the filler. Utility Model Content

[0003] The purpose of this invention is to provide a cooling device for seamless soft capsules during the packaging process, which solves the problem that the temperature of the soft capsules rises during the heating and heat sealing process from the feeder to the heat sealing section, causing the capsule skin to soften, the pressure of the internal filler to squeeze the capsule skin to break, and the filler to overflow.

[0004] To solve the above problems, the technical solution of this utility model is as follows:

[0005] A cooling device for a blister packaging machine includes a guide rail, a cooling cover, and cooling nozzles. A serpentine groove is provided at the bottom of the guide rail between the forming mold and the heat-sealing roller, and a cooling pipe is laid within the groove, through which a cooling medium flows. The cooling cover is installed above the guide rail between the feeder and the heat-sealing roller, and an air inlet is provided on the cooling cover, the air inlet being connected to cooling gas. The cooling nozzles are installed at the heat-sealing roller.

[0006] Furthermore, the air inlet is located at the upper center of the cooling cover, and a baffle is provided inside the cooling cover, located below the air inlet.

[0007] Furthermore, height-adjustable baffles are installed at both ends of the cooling cover.

[0008] Furthermore, the cooling pipe is a copper pipe, and the copper pipe is connected to a chiller.

[0009] Furthermore, the cooling nozzle is a duckbill fan-shaped nozzle, and the angle and airflow of the cooling nozzle can be adjusted. Preferably, the nozzle is oriented towards the position where the aluminum foil and PVC sheet contact below the heat-sealing roller. Cooling gas is generated by compressed air passing through a vortex tube cooler.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. By embedding copper pipes into the serpentine grooves milled at the bottom of the guide rail and connecting them to the chiller, the heat radiated by the heating plate of the PVC blister molding mold is carried away by the cooling water. The guide rail can be maintained at a low temperature and will not transfer heat to the soft blister pack.

[0012] 2. By installing a cooling cover above the guide rail, the soft capsules inside the blister pack above the guide rail are isolated from the environment. Cooling gas is introduced into the cooling cover, and the baffles inside the cover guide and disperse the cooling gas, causing the cooling gas to diffuse in all directions along different paths along the edges and surfaces of the baffles, improving cooling efficiency and keeping the soft capsules inside the blister pack in a relatively low-temperature environment.

[0013] Third, by setting cooling nozzles, cold air is injected into the blister pack to form a low-temperature buffer layer. During the heat sealing process, the low-temperature buffer layer can slow down the rate at which heat is transferred to the soft capsules, reducing the thermal shock to the soft capsules and thus providing protection. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional view of the cooling cover of this utility model.

[0017] Figure 3 This is a schematic diagram of the bottom structure of the guide rail of this utility model.

[0018] In the diagram: 1. Feeder; 2. Guide rail; 3. Cooling cover; 4. Cooling nozzle; 5. Heat sealing roller; 6. Aluminum foil roller; 7. Traction roller; 8. Feeding roller; 9. Heating plate; 10. Molding mold; 31. Air inlet; 32. Baffle; 33. Baffle fixing screw; 34. Copper pipe; 21. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-3 As shown, a cooling device for a blister packaging machine includes a guide rail 2, a cooling cover 3, and a cooling nozzle 4. PVC sheets wound on the feed roller 8 pass sequentially through a heating plate 9, a forming mold 10, a feeder 1, a guide rail 2, and a cooling cover 3, and are then wound together with aluminum foil pulled from the aluminum foil roller 6 onto a traction roller 7. A heat-sealing roller 5 is provided above the traction roller 7 to connect the aluminum foil and the PVC sheets together.

[0021] A serpentine groove is provided at the bottom of the guide rail 2 between the forming mold 10 and the heat sealing roller 5. A copper pipe 21 is laid in the groove and connected to a chiller. A cooling cover 3 is installed above the guide rail between the feeder 1 and the heat sealing roller 5. An air inlet 31 is opened in the middle of the upper part of the cooling cover 3, and cooling gas is introduced through the air inlet 31. A baffle 32 is provided below the air inlet 31. A cooling nozzle 4 is installed at the heat sealing roller 5. The cooling nozzle 4 adopts a duckbill fan-shaped nozzle. Compressed air is generated by passing through a vortex tube cooler to generate cooling gas, which is sprayed out from the cooling nozzle 4 and enters the cooling cover 3.

[0022] Furthermore, the bottom of guide rail 2 is milled with a serpentine groove 6mm wide and 8mm deep, and a copper cooling tube with an outer diameter of 6mm is embedded in the serpentine groove. The cooling tubes in multiple guide rails are connected in series with flexible hoses and connected to the inlet and outlet water pipes of the chiller.

[0023] The cooling cover 3 is made of transparent acrylic sheet, and is 670mm long, 370mm wide, and 25mm high. A baffle 32 is installed inside the cover, which is 200mm long and 150mm wide. The baffle is fixed to the inner wall of the cooling cover 3 by a 125mm long support.

[0024] The cooling nozzle 4 is made of stainless steel, and the cooling gas is produced by a vortex tube cooler. The cooling nozzle is a duckbill fan-shaped nozzle. The duckbill fan-shaped nozzle can spray the cooling gas in a fan shape, which can more accurately fill the cooling gas into the blister that is about to be heat-sealed compared to ordinary nozzles.

[0025] The working process of this utility model is as follows: PVC sheets on the feeding roller 8 are heated by the heating plate 9 and then pulled into the forming mold 10 by the slide table to form blister packs. Under the winding of the traction roller 7, the blister packs move in the grooves of the guide rail 2. When passing the feeder 1, soft capsules are filled into the blister packs. The heat-sealing roller 5 heats the aluminum-plastic composite film to a certain temperature, and then, under pressure, tightly bonds the PVC sheet to the aluminum foil roller 6 to form a firm seal. During this process, the bottom of the guide rail 2 is heated by the heat radiation from the heating plate 9. The radiated heat is carried away by the cooling water embedded in the cooling pipe at the bottom of the guide rail 2, preventing the temperature of the guide rail 2 from rising and causing the soft capsules to overheat.

[0026] The cooling cover 3 is installed above the guide rail 2. Adjustable baffles 33 are provided on both sides of the cooling cover 3. The adjustable baffles 33 are fixedly connected to the frame (not shown in the frame diagram). The adjustable baffles 33 and the cooling cover 3 are connected by oblong holes and screws. Adjusting the height of the baffles 33 allows the PVC sheet 8 to pass between the cooling cover 3 and the guide rail. After the cooling gas enters through the air inlet 31, the airflow is blocked by the turbulence baffle 32 and reflected to the top of the cooling cover. Through back-and-forth movement, the cooling gas entering from the air inlet 31 is evenly dispersed into the space of the cooling cover, improving the cooling effect and keeping the soft capsules inside the blister pack in a relatively low-temperature environment.

[0027] The cooling nozzle 4 is directed towards the contact point between the aluminum foil and the PVC sheet below the heat-sealing roller. This allows cooling gas to be injected into the blister pack that is about to be heat-sealed, forming a low-temperature buffer layer. This slows down the rate at which the heat-sealing roller 5 transfers heat to the soft capsule, reducing the thermal shock to the soft capsule and thus providing protection.

[0028] A valve and a universal bamboo-joint positioning tube (not shown in the diagram) are installed on the cooling pipe connecting to the cooling nozzle 4. The angle and airflow of the cooling nozzle 4 are adjusted through the valve and the universal bamboo-joint positioning tube. The cooling nozzle can flexibly change the spray angle and airflow of the cooling gas according to different blister packaging process requirements, the characteristics of soft capsules, and the working state of the heat sealing roller, so as to achieve a more precise cooling effect and further improve the protection of the soft capsules.

[0029] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A cooling device for a blister packaging machine, comprising a guide rail (2), a cooling cover (3), and a cooling nozzle (4), characterized in that: A serpentine groove is provided at the bottom of the guide rail (2) between the forming mold (10) and the heat sealing roller (5), and a cooling pipe is laid in the groove, with a cooling medium flowing in the cooling pipe; a cooling cover (3) is installed above the guide rail (2) between the feeder (1) and the heat sealing roller (5), and an air inlet (31) is opened on the cooling cover (3), which is connected to the cooling gas; a cooling nozzle (4) is installed at the heat sealing roller (5).

2. The cooling device for a blister packaging machine according to claim 1, characterized in that: The air inlet (31) is located at the upper middle position of the cooling cover (3), and a baffle (32) is provided inside the cooling cover (3), which is located below the air inlet (31).

3. The cooling device for a blister packaging machine according to claim 1, characterized in that: The cooling cover (3) is equipped with height-adjustable baffles (33) at both ends.

4. The cooling device for a blister packaging machine according to claim 1, characterized in that: The cooling pipe is a copper pipe, and the copper pipe is connected to a chiller.

5. The cooling device for a blister packaging machine according to claim 1, characterized in that: The cooling nozzle (4) is a duckbill fan-shaped nozzle.

6. The cooling device for a blister packaging machine according to claim 5, characterized in that: The angle and airflow of the cooling nozzle (4) can be adjusted.

7. A cooling device for a blister packaging machine according to claim 5, characterized in that: The jet direction of the cooling nozzle (4) is toward the position where the aluminum foil and PVC sheet below the heat sealing roller come into contact.

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