A blister mold for a blister box and a method of using the same

Abstract

This invention relates to the field of blister molding technology, and more particularly to a blister molding mold for blister boxes and its usage method. The mold includes a mounting base, a mold body, and a top plate. The mold body is fixed to the mounting base. A U-shaped groove is formed at the top edge of the mounting base. Positioning posts are vertically arranged at both ends of the mounting base. The bottom end of each positioning post penetrates the mounting base and is slidably connected to it. A base plate is fixed to the bottom end of the positioning post. A second spring is arranged between the base plate and the mounting base. A heating element and an air duct are installed on the top plate. A frame is provided at the bottom of the top plate. Cavities are provided at both ends of the frame. Positioning holes are provided at the bottom of the cavities. A rack is installed at the top of the cavities via a first spring. This invention reduces the processing steps for blister boxes, improves processing efficiency, and when the blister box is cut by a transverse blade, the transverse blade can also be used as a guide plate to improve the cooling effect, thus facilitating the cutting of the blister box.

Description

Technical Field

[0001] This invention relates to the field of blister molding technology, and in particular to a blister molding mold for blister boxes and its method of use. Background Technology

[0002] Vacuum forming is a plastic processing technique. The main principle is to heat a flat plastic sheet until it softens, then use a vacuum to adhere it to the surface of a mold, and finally let it cool to form the desired shape. It is widely used in industries such as plastic packaging, lighting, advertising, and decoration.

[0003] In a broad sense, blister packs refer to all blister packs; in a narrow sense, they refer to a specific type of blister pack. They are made by vacuum forming sheets into plastic boxes, with the lid attached to the container. They are mostly made of polystyrene, but some have separate lids and bottoms, and different materials can be used. Blister packs are formed in multiple pieces at once using a blister mold. However, traditional blister molds have a simple structure, requiring the mold to be removed after forming and then cut again using a cutting device. This requires two processing steps, making the process cumbersome and inefficient. Therefore, we propose a blister mold for blister packs and its application method to solve these problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing technologies where the blister box needs to be removed and cut again after molding, requiring two separate processing steps, which is cumbersome and inefficient. The invention proposes a blister mold for blister boxes and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A blister mold for a blister box includes a mounting base, a mold body and a top plate. The mold body is fixed on the mounting base, and a U-shaped groove is provided at the top edge of the mounting base. Positioning posts are vertically provided at both ends of the mounting base, and the positioning posts are located in the groove.

[0007] The bottom end of the positioning column passes through the mounting base and is slidably connected to the mounting base, and a base plate is fixed to the bottom end of the positioning column, with a second spring provided between the base plate and the mounting base;

[0008] Heating pipes and air ducts are installed on the top plate, and a frame is provided at the bottom of the top plate. Cavities are provided at both ends of the frame. Positioning holes are provided at the bottom of the cavities, and a rack is installed at the top of the cavities through a first spring.

[0009] Inside the frame body, a cutting mechanism is provided. The cutting mechanism includes two fixedly installed mounting plates. The mounting plates are hollow, and longitudinal blades are fixed to the bottoms of both mounting plates. Three transverse blades are rotatably installed between the two mounting plates through a rotating shaft. The rotating shafts at the ends of the two transverse blades extend into the interior of the mounting plates, and single-row pulleys are fixed to their inner ends;

[0010] On both of the two mounting plates, a rotating shaft is rotatably installed. One end of the rotating shaft extends into the interior of the mounting plate and is fixed with a double-row synchronous pulley and is fixedly connected to the middle transverse blade at the same time. The other end of the rotating shaft extends into the cavity and is fixed with a gear. The gear meshes with the rack. By continuously lowering the top plate, the transverse blade and the longitudinal blade are driven to descend to slit the plastic suction box on the mold body, thus avoiding removing the plastic suction box for secondary processing, reducing the processing steps, and at the same time improving the processing efficiency of the plastic suction box.

[0011] As a preferred technical solution of the present invention, negative pressure holes for air extraction are provided on the mold body, and a negative pressure pipe is provided at the bottom end of the mounting seat. The negative pressure pipe is connected to the negative pressure holes in the mold body, and the negative pressure pipe is connected to an external negative pressure machine to perform plastic suction operation on the plastic suction box.

[0012] As a preferred technical solution of the present invention, the width of the groove is adapted to the thickness of the frame body, and a sealing strip is provided on the inner side of the top end of the groove. A pressing frame is provided at the bottom end of the frame body. The setting of the sealing strip improves the sealing degree after the frame body is closed with the mold body, which is convenient for adsorbing the plastic suction box.

[0013] As a preferred technical solution of the present invention, the pressing frame is in a "return" shape, and the pressing frame is snap-connected to the frame body. Anti-slip grooves are provided on the inner walls of both sides of the pressing frame. The material can be fixed by the pressing frame, and the pressing frame can be easily removed through the setting of the anti-slip grooves.

[0014] As a preferred technical solution of the present invention, sliding grooves are opened on the inner walls of both sides of the cavity, and limiting plates are fixed to the upper and lower ends of the rack. The limiting plates are installed in the sliding grooves. At the same time, when the gear is at the bottom end of the rack, the cutting edge of the transverse blade is vertically downward, so as to correct the transverse blade first, which is convenient for cutting the plastic suction box.

[0015] As a preferred technical solution of the present invention, the elastic coefficient of the first spring is less than the elastic coefficient of the second spring. When the first spring and the second spring are squeezed at the same time, the first spring is deformed first.

[0016] As a preferred technical solution of the present invention, the positioning column is adapted to the positioning hole, and a chamfer is provided at the top end of the positioning column, which is convenient for the positioning column to be inserted into the positioning hole.

[0017] As a preferred technical scheme of the present application, one end of the top plate is provided with a connecting pipe, the connecting pipe is connected with a plurality of the air pipes, and a fan is arranged on the connecting pipe to cool the formed blister box, thereby improving the cooling efficiency of the blister box and facilitating the cutting of the blister box.

[0018] As a preferred technical scheme of the present application, the number of the air pipes is the same as the number of the transverse blades, the bottom end of the air pipe is provided with a plurality of nozzles, and the air pipe is located above the transverse blade, so that the air flow is guided by the transverse blade.

[0019] As a preferred technical scheme of the present application, openings are arranged on the top plate, the air pipes and the heating pipes are arranged between the openings, and the air pipes and the heating pipes are arranged transversely and alternately, so that the use effect of the air pipes and the heating pipes is improved as much as possible in the limited installation space, and the openings can also exhaust the air in the frame during the descent of the frame.

[0020] A use method of a blister box blister mold, comprising the following steps:

[0021] Step 1, fixing the plastic sheet on the bottom of the frame;

[0022] Step 2, turning on the heating pipe to heat and soften the plastic sheet;

[0023] Step 3, driving the top plate and the frame to descend by the external hydraulic cylinder, so that the frame is inserted into the groove, and the descent is stopped when the frame is inserted into the groove;

[0024] Step 4, turning on the negative pressure pump connected with the mold body to generate negative pressure at the top end of the mold body to form the blister box by suction molding;

[0025] Step 5, after the suction is completed, turning off the heating pipe and turning on the fan to cool the blister box by blowing air;

[0026] Step 6, turning on the external hydraulic cylinder again to drive the top plate and the frame to continue to descend, when the frame descends, the positioning column is inserted into the positioning hole, and the rack is pushed by the positioning column, the gear is driven to rotate by the rack, the rotating shaft is rotated, and the transverse blade is rotated, the air flow blown by the fan is guided to different directions of the blister box by the transverse blade, so that the blister box can be uniformly cooled;

[0027] Step 7, when the gear is located at the lowermost part of the rack, the transverse blade is vertically arranged, and the blister box is cut by the continuous descent of the transverse blade and the longitudinal blade, so that the blister box is slitting cut.

[0028] The present application has the following advantages:

[0029] The device can avoid secondary processing of the blister box by cutting the blister box on the mold body through the continuous descent of the top plate to drive the transverse blade and the longitudinal blade to cut the blister box, thereby reducing the processing steps and improving the processing efficiency of the blister box.

[0030] The device can make the blister box evenly cool by rotating the transverse blade as a wind deflector to guide the airflow blown by the fan to different directions of the blister box while the transverse blade is descending, thereby facilitating the cutting of the blister box.

[0031] The device can reduce the use of electrical equipment by pushing the rack to move through the positioning column to position the top plate when it is descending, thereby reducing the cost.

[0032] In summary, the device reduces the processing steps of the blister box and improves the processing efficiency of the blister box. When the transverse blade cuts the blister box, the transverse blade can also be used as a wind deflector to improve the cooling effect of the blister box, thereby facilitating the cutting of the blister box. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structure diagram of a blister box blister mold and its use method is provided for the present application;

[0034] Figure 2 A structure diagram of the inside of the frame body in a blister box blister mold and its use method is provided for the present application;

[0035] Figure 3 A structure diagram of the cross section of a blister box blister mold and its use method is provided for the present application;

[0036] Figure 4 A structure diagram of a cutting device in a blister box blister mold and its use method is provided for the present application.

[0037] In the figure: 1, mounting seat; 2, groove; 3, mold body; 4, positioning column; 5, top plate; 6, heating pipe; 7, air pipe; 8, connecting pipe; 9, fan; 10, frame; 11, positioning hole; 12, mounting plate; 13, transverse blade; 14, longitudinal blade; 15, cavity; 16, rack; 17, limit plate; 18, sliding slot; 19, pressing frame; 20, rotating shaft; 21, gear; 22, first spring; 23, double-row synchronous wheel; 24, single-row pulley; 25, negative pressure pipe; 26, bottom plate; 27, second spring. DETAILED DESCRIPTION

[0038] 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. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Reference Figures 1-4 A blister mold for a blister box includes a mounting base 1, a mold body 3, and a top plate 5. The mold body 3 is fixed on the mounting base 1. The mold body 3 is provided with a negative pressure hole for evacuation. A negative pressure pipe 25 is provided at the bottom of the mounting base 1. The negative pressure pipe 25 is connected to the negative pressure hole in the mold body 3. The negative pressure pipe 25 is connected to an external negative pressure machine to perform blister molding. A U-shaped groove 2 is provided at the top edge of the mounting base 1. A positioning post 4 is vertically provided at both ends of the mounting base 1. The positioning post 4 is located in the groove 2.

[0042] The bottom end of the positioning post 4 passes through the mounting base 1 and is slidably connected to the mounting base 1. The mounting base 1 has a through hole that matches the positioning post 4, and the bottom end of the positioning post 4 is fixed with a base plate 26. A second spring 27 is provided between the base plate 26 and the mounting base 1. The second spring 27 is sleeved on the positioning post 4 and is fixedly connected to the mounting base 1 and the base plate 26. The positioning post 4 is used to position the frame 10 during vacuum forming, thereby improving the accuracy of the fit between the frame 10 and the mold body 3.

[0043] Heating pipe 6 and air duct 7 are installed on the top plate 5. The top plate 5 has an opening, and the air duct 7 and heating pipe 6 are installed between the openings. The air duct 7 and heating pipe 6 are arranged alternately in the horizontal direction to maximize the use of air duct 7 and heating pipe 6 within the limited installation space. At the same time, the opening can also exhaust the internal air during the descent of the frame 10.

[0044] Meanwhile, a connecting pipe 8 is provided at one end of the top plate 5. The connecting pipe 8 is connected to multiple air ducts 7, and a fan 9 is provided on the connecting pipe 8. The fan 9 cools the molded blister box, improves the cooling efficiency of the blister box, and facilitates the cutting of the blister box. The number of air ducts 7 is the same as the number of transverse blades 13. Multiple nozzles are provided at the bottom of the air ducts 7, and the air ducts 7 are located above the transverse blades 13, so that the air ducts 7 are located above the transverse blades 13 to facilitate the airflow being guided by the transverse blades 13.

[0045] The bottom of the top plate 5 is provided with a frame 10, and both ends of the frame 10 are provided with cavities 15. The bottom of the cavity 15 is provided with a positioning hole 11, and the top of the cavity 15 is equipped with a rack 16 through a first spring 22.

[0046] The cavity 15 has grooves 18 on both sides of its inner wall, and the upper and lower ends of the rack 16 are fixed with limit plates 17. The limit plates 17 are installed in the grooves 18. When the gear 21 is at the lowest end of the rack 16, the blade of the transverse blade 13 is vertically downward, so that the transverse blade 13 is aligned first, which makes it easier to cut the blister box. The elastic coefficient of the first spring 22 is less than that of the second spring 27. When the first spring 22 and the second spring 27 are squeezed, the first spring 22 deforms first.

[0047] It should be noted that the positioning post 4 is adapted to the positioning hole 11, and the top of the positioning post 4 is chamfered to facilitate the insertion of the positioning post 4 into the positioning hole 11. While the positioning post 4 and the positioning hole 11 are used to position the frame 10, the positioning post 4 also presses the rack 16, causing the rack 16 to move upward in the cavity 15, thereby driving the gear 21 to rotate and drive the gear 21.

[0048] Secondly, the width of the groove 2 is adapted to the thickness of the frame 10, and a sealing strip is provided on the inner side of the top of the groove 2. The bottom of the frame 10 is provided with a pressure frame 19. The sealing strip improves the sealing degree after the frame 10 and the mold body 3 are closed, which facilitates the adsorption of the blister box. The pressure frame 19 is "U" shaped and is snapped to the frame 10. Anti-slip grooves are provided on the inner walls of both sides of the pressure frame 19. The material can be fixed by the pressure frame 19, and the anti-slip grooves make it easy to remove the pressure frame 19.

[0049] Meanwhile, the inside of the frame body 10 is provided with a cutting mechanism, the cutting mechanism comprises two mounting plates 12 which are fixedly arranged, two ends of the mounting plate 12 are fixed on the inside walls of the two sides of the frame body 10, meanwhile, the mounting plate 12 is hollowly arranged, and the bottom of each of the two mounting plates 12 is fixed with a longitudinal blade 14, and three transverse blades 13 are rotatably arranged between the two mounting plates 12 through a rotating shaft, the end of each of the two transverse blades 13 is extended to the inside of the mounting plate 12 and the inner end thereof is fixed with a single-row pulley 24;

[0050] A rotating shaft 20 is rotatably arranged on each of the two mounting plates 12, one end of the rotating shaft 20 is extended to the inside of the mounting plate 12 and is fixed with a double-row synchronous pulley 23 which is fixedly connected with the middle transverse blade 13, and the other end of the rotating shaft 20 is extended to the cavity 15 and is fixed with a gear 21, the gear 21 is engaged with the rack 16, the transverse blade 13 and the longitudinal blade 14 are driven to descend by the continuous descending of the top plate 5 to cut the blister box on the mold body 3, so that the blister box is not taken off for secondary processing, the processing steps are reduced, and the processing efficiency of the blister box is improved.

[0051] In the embodiment: when the device is used, the mounting seat 1 and the top plate 5 need to be respectively installed on the external blistering machine, the plastic sheet is heated and softened by opening the heating pipe 6, when a certain degree is reached, the top plate 5 and the frame body 10 are driven to descend by the external hydraulic cylinder, the frame body 10 is inserted into the groove 2 (stop descending when the frame body 10 is inserted into the groove 2), at this time, the external negative pressure machine works, the mold body 3 works, and the blister box is blistered;

[0052] After the plastic suction is completed, the heating pipe 6 stops working, the fan 9 is opened, the plastic suction box is blown and cooled by the fan 9 through the air pipe 7, meanwhile, the frame body 10 continues to descend, the positioning column 4 is inserted in the positioning hole 11 when the frame body 10 descends, and the rack 16 is pushed by the positioning column 4, because the elastic coefficient of the first spring 22 is smaller than the elastic coefficient of the second spring 27, the second spring 27 remains unchanged when the first spring 22 is deformed, so that the rack 16 is driven to rise, the gear 21 is driven to rotate by the rack 16, the rotating shaft 20 is rotated, meanwhile, the horizontal blade 13 is rotated, the air flow is guided by the horizontal blade 13, the air flow blown by the fan 9 is guided to different directions of the plastic suction box, so that the plastic suction box can be uniformly cooled, when the gear 21 is located at the lowermost of the rack 16, the horizontal blade 13 is vertically arranged, meanwhile, the limiting plate 17 is located at the top end of the sliding groove 18, the rack 16 is limited to continue to move upward, so that the horizontal blade 13 and the vertical blade 14 continue to descend to cut the plastic suction box by the reaction force when the frame body 10 continues to descend, so that the plastic suction box is cut without being taken down for cutting, the processing steps of the plastic suction box are reduced, the processing efficiency of the plastic suction box is improved, and when the plastic suction box is cut by the horizontal blade 13, the horizontal blade 13 can also be used as a wind deflector, the cooling effect of the plastic suction box is improved, so that the plastic suction box is conveniently cut.

[0053] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A blister mold for a blister pack, comprising a mounting base (1), a mold body (3) and a top plate (5), characterized in that, The mold body (3) is fixed on the mounting base (1), and a groove (2) in the shape of a double square is formed at the top edge of the mounting base (1). Positioning columns (4) are vertically arranged at both ends of the mounting base (1), and the positioning columns (4) are located within the groove (2). The bottom end of the positioning column (4) penetrates through the mounting base (1) and is slidably connected to the mounting base (1). A bottom plate (26) is fixed to the bottom end of the positioning column (4), and a second spring (27) is arranged between the bottom plate (26) and the mounting base (1). A heating pipe (6) and an air duct (7) are installed on the top plate (5). A frame body (10) is arranged at the bottom of the top plate (5). Cavities (15) are arranged inside both ends of the frame body (10). A positioning hole (11) is arranged at the bottom of the cavity (15). A rack (16) is installed at the top of the cavity (l5) through a first spring (22). A cutting mechanism is arranged inside the frame body (10). The cutting mechanism includes two mounting plates (12) fixedly arranged. The mounting plates (12) are hollow. Longitudinal blades (14) are fixed to the bottoms of both mounting plates (12). Three transverse blades (13) are rotatably installed between the two mounting plates (12) through a rotating shaft. The end rotating shafts of the two transverse blades (13) on both sides extend into the interior of the mounting plate (12), and single-row belt pulleys (24) are fixed to the inner ends thereof. Rotating shafts (20) are rotatably installed on both mounting plates (12). One end of the rotating shaft (20) extends into the interior of the mounting plate (12) and is fixed with a double-row synchronous pulley (23) which is fixedly connected to the middle transverse blade (13). The other end of the rotating shaft (20) extends into the cavity (15) and is fixed with a gear (21), and the gear (21) meshes with the rack (16). Sliding grooves (18) are formed on the inner walls of both sides of the cavity (15). Limit plates (17) are fixed to the upper and lower ends of the rack (16), and the limit plates (17) are installed in the sliding grooves (18). At the same time, when the gear (2l) is located at the lowest end of the rack (16), the cutting edges of the transverse blades (13) are vertically downward. The elastic coefficient of the first spring (22) is smaller than that of the second spring (27). When the first spring (22) and the second spring (27) are compressed, the first spring (22) is deformed first.

2. The blister mold for a blister pack according to claim 1, wherein Negative pressure holes for air extraction are arranged on the mold body (3). A negative pressure pipe (25) is arranged at the bottom end of the mounting base (1), and the negative pressure pipe (25) is connected to the negative pressure holes inside the mold body (3).

3. The blister mold for a blister pack according to claim 1, wherein 4. The blister mold for a blister pack according to claim 3, wherein The width of the groove (2) is adapted to the thickness of the frame body (10). A sealing strip is arranged on the inner side of the top end of the groove (2). A pressing frame (19) is arranged at the bottom end of the frame body (10).

5. The blister mold for a blister pack according to claim 1, wherein The pressing frame (19) is in the shape of a double square, and the pressing frame (19) is snap-connected to the frame body (10). Anti-slip grooves are arranged on the inner walls of both sides of the pressing frame (19). The positioning column (4) is adapted to the positioning hole (11), and a chamfer is arranged at the top end of the positioning column (4).

6. The blister mold for a blister pack according to claim 1, wherein One end of the top plate (5) is provided with a connecting pipe (8), the connecting pipe (8) is connected with a plurality of the air pipe (7), and the connecting pipe (8) is provided with a fan (9).

7. The blister mold for a blister pack according to claim 6, wherein The number of the air pipe (7) is same as the number of the transverse blade (13), the bottom end of the air pipe (7) is provided with a plurality of nozzles, and the air pipe (7) is located above the transverse blade (13).

8. The method of using a blister mold for a blister pack according to claim 1, wherein, The method comprises the following steps: Step 1, fix the plastic sheet on the bottom of the frame (10); Step 2, open the heating pipe (6), heat and soften the plastic sheet through the heating pipe (6); Step 3, drive the top plate (5) and the frame (10) to descend by the external hydraulic cylinder, make the frame (10) be inserted in the groove (2), and stop descending when the frame (10) is inserted in the groove (2); Step 4, open the negative pressure pump connected with the mold body (3), generate negative pressure at the top end of the mold body (3) through the negative pressure pump, and perform vacuum forming on the vacuum forming box; Step 5, after vacuum forming, close the heating pipe (6), open the fan (9), and blow and cool the vacuum forming box through the air pipe (7); Step 6, open the external hydraulic cylinder again, drive the top plate (5) and the frame (10) to continue descending, when the frame (10) is descending, the positioning column (4) is inserted in the positioning hole (11), the rack (16) is pushed by the positioning column (4), the gear (21) is rotated by the rack (16), the rotating shaft (20) is rotated, the transverse blade (13) is rotated, the airflow is guided by the transverse blade (13), the airflow blown by the fan (9) is guided to different directions of the vacuum forming box, and the vacuum forming box can be uniformly cooled; Step 7, when the gear (21) is located at the lowermost of the rack (16), the transverse blade (13) is vertically arranged, the vacuum forming box is cut by the continuous descending of the transverse blade (13) and the longitudinal blade (14), and the vacuum forming box is slitting cut.

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