Packaging box plastic uptake mold and plastic uptake forming method thereof

Abstract

The invention relates to the technical field of plastic uptake molds, and discloses a packaging box plastic uptake mold and a plastic uptake forming method thereof.The packaging box plastic uptake mold comprises a main body, the interior of the main body is hollow, a plurality of mold blocks are fixedly connected to the interior of the main body, a plurality of adsorption holes are formed in the side walls of the mold blocks, and every two adsorption holes form a group and are distributed at equal intervals. The situation that when plastic is pushed to flow downwards, wrinkles and overlapping are generated on the surface of the plastic is reduced, and then after the surface of the plastic is attached to the inner wall of the mold block, the plastic can evenly extend to the bottom of the mold block through bottom adsorption; and therefore, the condition of wrinkles or uneven deformation of the plastic generated during plastic uptake in the adsorption ring can be reduced, and the forming quality after plastic uptake can be enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic suction molds, and specifically to a plastic suction mold for a packaging box and a plastic suction molding method thereof. Background Technique

[0002] Blister packaging is a packaging method widely used in various industries, especially in the fields of food, medicine, electronics, toys, etc. It can provide good protection for products, preventing them from being damaged, contaminated, etc. during transportation, storage, and sales. At the same time, blister packaging also has a good display effect, allowing consumers to clearly see the product, enhancing the attractiveness and competitiveness of the product;

[0003] When recycling plastics, it is generally necessary to use a plastic suction mold to form various packaging boxes for utilization. When blistering the plastic of the packaging box, it is necessary to push the heated plastic into the mold cavity by the downward movement of the convex structure on the upper mold. Subsequently, after forming a negative pressure extraction at the bottom of the mold cavity, the plastic is filled into the mold cavity for molding. Since the heated plastic has high plasticity and the adsorption holes in the mold cavity are generally arranged at the bottom, when the convex structure on the upper mold pushes the plastic downward, it will stretch the plastic. At this time, wrinkles will appear on the surface of the plastic in the mold cavity. When negative pressure is used to perform negative pressure blistering on the plastic through the bottom of the mold cavity, it is easy to cause the stretched plastic to fold or deform at the edge under the action of the negative pressure, affecting the molding quality after blistering. Summary of the Invention

[0004] The purpose of the present invention is to provide a plastic suction mold for a packaging box and a plastic suction molding method thereof to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention is a plastic suction mold for a packaging box, including a main body. The inside of the main body is hollow, and a plurality of mold blocks are fixedly connected inside the main body. A plurality of adsorption holes are opened on the side wall of the mold block. The plurality of adsorption holes are arranged in pairs at equal distances, and further includes;

[0007] A plastic suction mechanism, which is installed inside the main body and is used for blistering plastics;

[0008] An auxiliary mechanism, which is installed on the top of the plastic suction mechanism and is used to prevent the blistered plastic from rebounding;

[0009] An adsorption ring is slidably connected to the outer surface of the mold block, and two second sealing rings are fixedly connected to the outer surface of the adsorption ring.

[0010] Further, the main body includes an upper mold slidably connected to the top of the main body. The main body includes:

[0011] The downward movement mechanism is installed on the top of the upper mold.

[0012] The support mechanism is installed at the bottom of the main body.

[0013] The negative pressure component is installed inside the main body.

[0014] Furthermore, the thermoforming mechanism includes:

[0015] The connecting component is arranged on the outer surface of the adsorption ring.

[0016] The sliding component is installed at the bottom of the adsorption ring.

[0017] The communicating component is installed inside the sliding component.

[0018] The fixing component is installed inside the mold block.

[0019] Furthermore, the auxiliary mechanism includes several fixing plates fixedly connected to the top of the adsorption ring. The auxiliary mechanism includes:

[0020] The moving component is installed between the two fixing plates.

[0021] The extraction component is installed on the top of the extraction component through a translation member.

[0022] Furthermore, the downward movement mechanism includes an electric push rod fixedly connected to the inner wall of the top of the upper mold. The output end of the electric push rod is fixedly connected with a moving frame.

[0023] The bottom of the moving frame penetrates through the outer wall of the bottom of the upper mold and extends to the outside. The extended end of the moving frame is fixedly connected with a convex template.

[0024] The support mechanism includes a support frame fixedly connected to the bottom of the main body. Two connecting pipes are fixedly connected to the inner wall of the bottom of the support frame.

[0025] The negative pressure component includes a negative pressure chamber opened inside the main body.

[0026] Among them, a cooling box is fixedly connected inside the main body. Two circulation pipes are fixedly connected to the front of the cooling box.

[0027] Among them, the top of the connecting pipe is in communication with the inside of the negative pressure chamber.

[0028] Furthermore, the connecting component includes a sealing ring one fixedly connected to the bottom of the adsorption ring.

[0029] The sliding component includes two connecting cylinders fixedly connected to the bottom of the adsorption ring. A piston rod is fixedly connected inside the connecting cylinder. A return spring is fixedly connected to the inner wall of the top of the connecting cylinder.

[0030] The connecting component includes a connecting pipe slidably connected inside the connecting cylinder;

[0031] Among them, the top of the connecting pipe is fixedly connected to the bottom of the return spring, and the inside of the connecting pipe is tapered.

[0032] Furthermore, a central cylinder is fixedly connected between the two connecting pipes. The inside of the central cylinder is tapered, and a spring tapered shaft is slidably connected to the bottom inner wall of the central cylinder;

[0033] The bottom of the central cylinder is in communication with the negative pressure chamber, and the top of the central cylinder fixedly penetrates through the bottom inner wall of the support frame;

[0034] The fixing component includes an adsorption plate slidably connected inside the mold block, and a cross shaft is fixedly connected to the bottom of the adsorption plate.

[0035] Furthermore, several fixing plates are symmetrically distributed in pairs with the middle of the adsorption ring as the center. Each group of fixing plates is arranged at equal angles, and inclined grooves are formed on the side walls of the fixing plates;

[0036] The moving component includes short rods slidably connected inside the inclined grooves. A bending plate is fixedly connected between the two short rods. The inside of the bending plate is hollow, and several round holes are formed at the bottom of the bending plate;

[0037] Among them, a flexible layer is fixedly connected to the side of the bending plate close to the short rod. The bottom of the flexible layer is fixedly connected to the top of the adsorption ring, and the side wall of the bending plate is rotatably connected to the outer surface of the mold block.

[0038] Furthermore, the translation part includes a rectangular box arranged on the top of the bending plate. The side wall of the rectangular box is fixedly connected inside the main body, and several conical holes are fixedly connected to the top of the rectangular box;

[0039] Among them, a hose is fixedly connected to the side of the rectangular box close to the fixing plate. The hose is fixedly connected to the side wall of the bending plate, and the rectangular box is in communication with the inside of the bending plate through two hoses;

[0040] The extraction component includes a piston strip slidably connected inside the rectangular box. The bottom of the piston strip slidably penetrates through the bottom outer wall of the rectangular box. A C-shaped frame is fixedly connected to the side wall of the piston strip. An arc-shaped plate is rotatably connected to the central axis of the C-shaped frame, and several auxiliary springs are fixedly connected to the top of the piston strip.

[0041] Furthermore, a method for using a plastic suction mold for a packaging box, the plastic suction mold for a packaging box, the method includes the following steps:

[0042] S1: Place and close: First, place the heated plastic on the top of the main body, and then close the upper mold with the main body;

[0043] S2: Pipe connection: Subsequently, connect the connecting pipe to an external negative pressure device, and at the same time connect the two circulation pipes to the circulation equipment of the water source to enable the external water source to circulate in the cooling box;

[0044] S3: Negative pressure thermoforming: Start the external negative pressure device, so that the negative pressure extracts the air in the mold block through the negative pressure component and makes the plastic adhere to the inner wall of the mold block, achieving the purpose of thermoforming the packaging box.

[0045] The present invention has the following beneficial effects:

[0046] 1. In the present invention, through the negative pressure component, the communication component and the fixing component, when the gas inside the adsorption ring is extracted, an adsorption force will be generated on the mold block through a circle of adsorption holes on the upper part of the mold block. At this time, the plastic under the downward movement of the convex template will be adsorbed by a group of adsorption holes in the upper part and adhere to the inner wall main body of the mold block, filling the inner wall of the mold block initially. At this time, the heated plastic can be more completely adhered to the inner wall of the mold block. Through the phased adsorption of the adsorption ring and the central cylinder during thermoforming, when the negative pressure sucks the plastic through the adsorption ring, the plastic can be preferentially pulled towards the inner wall of the mold block, quickly fixing the edge position of the plastic on the inner wall of the mold block, reducing the situation of wrinkles and overlaps on the plastic surface when the plastic is pushed and flows downward. Subsequently, after the surface of the plastic adheres to the inner wall of the mold block, the adsorption at the bottom can make the plastic evenly extend to the bottom of the mold block, thereby reducing the wrinkles or uneven deformation of the plastic during thermoforming in the adsorption ring, and thus enhancing the forming quality after thermoforming.

[0047] 2. In the present invention, through the sliding component and the communication component, when the adsorption ring slides down, it will coincide with several adsorption holes at the bottom. At the same time, the piston rod will cross the conical channel in the communication pipe. After the adsorption ring slides down and separates from several adsorption holes at the top, the plastic adhering to the inner wall of the mold block will separate from the adsorption force of the adsorption ring. At this time, the plastic adhering to the inner wall of the mold block will flow synchronously when the convex template pushes the plastic downward, thereby reducing the situation that the middle part of the plastic is over-pulled and deformed or even torn locally when the middle part of the plastic is pushed downward due to the surface of the plastic being adsorbed and adhering to the upper part of the side wall of the mold block for a long time, ensuring the integrity after thermoforming and improving the forming quality of the product.

[0048] 3. In the present invention, through the moving component and the extraction component, when the piston bar moves downward, the downward movement of the piston bar can adsorb a small amount of external air through several conical holes at the top, and at the same time, it can also adsorb the air inside the bending plate through the hoses on both sides. At this time, a part of the adsorbed air will pass through several round holes on the side wall of the bending plate and generate a certain adsorption force on the plastic surface attached to the inside of the mold block through the adsorption holes. Furthermore, it can reduce the situation that when the negative pressure generated by the adsorption ring is separated from the adsorption of the plastic surface, the plastic rebounds locally due to the sudden release of the adsorption force, and reduce the deformation or local depression of the blister-packed packaging box caused by the local rebound of the plastic during blistering. Therefore, it can further enhance the forming quality and forming efficiency of the packaging box during blistering.

[0049] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0051] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0052] Figure 2 It is a schematic diagram of the overall partial sectional structure of the present invention;

[0053] Figure 3 It is a schematic diagram of the downward movement mechanism of the present invention;

[0054] Figure 4 It is a schematic diagram of the upward view structure of the downward movement mechanism of the present invention;

[0055] Figure 5 It is a schematic diagram of the partial structure of the support mechanism of the present invention;

[0056] Figure 6 It is a schematic diagram of the bottom sectional plane of the main body of the present invention;

[0057] Figure 7 It is a schematic diagram of the moving component of the present invention;

[0058] Figure 8 It is a schematic diagram of the communication component of the present invention;

[0059] Figure 9 It is a schematic diagram of the extraction component of the present invention;

[0060] Figure 10Schematic diagram of the upward view of the moving component of the present invention;

[0061] Figure 11 Flow chart of the thermoforming method of the present invention.

[0062] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0063] In the figure: 1. Main body; 101. Upper mold; 102. Mold block; 11. Downward moving mechanism; 111. Electric push rod; 112. Moving frame; 113. Convex template; 12. Support mechanism; 121. Support frame; 122. Connecting pipe; 13. Negative pressure component; 131. Negative pressure chamber; 132. Cooling box; 133. Circulation pipe; 2. Thermoforming mechanism; 201. Adsorption ring; 21. Connecting component; 211. Sealing ring I; 212. Sealing ring II; 22. Sliding component; 221. Connecting cylinder; 222. Piston rod; 23. Connecting component; 231. Connecting pipe; 232. Central cylinder; 233. Spring conical shaft; 24. Fixing component; 241. Cross shaft; 242. Adsorption plate; 3. Auxiliary mechanism; 301. Fixed plate; 31. Moving component; 311. Short rod; 312. Bending plate; 313. Flexible layer; 32. Extraction component; 321. Rectangular box; 322. Piston strip; 323. C-shaped frame; 324. Arc-shaped plate. Detailed implementation manners

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0065] Please refer to Figures 1-11 As shown, the present invention is a thermoforming mold for a packaging box, including a main body 1. The inside of the main body 1 is hollow, and a plurality of mold blocks 102 are fixedly connected inside the main body 1. A plurality of adsorption holes are formed in the side wall of the mold block 102, and the plurality of adsorption holes are equally spaced in pairs, and further includes;

[0066] A thermoforming mechanism 2, which is installed inside the main body 1 and is used for thermoforming plastics;

[0067] An auxiliary mechanism 3, which is installed on the top of the thermoforming mechanism 2 and is used to prevent the thermoformed plastics from rebounding;

[0068] An adsorption ring 201 is slidably connected to the outer surface of the mold block 102, and two sealing rings II 212 are fixedly connected to the outer surface of the adsorption ring 201.

[0069] The main body 1 includes an upper mold 101 slidably connected to the top of the main body 1, and the main body 1 includes:

[0070] A downward movement mechanism 11, which is installed on the top of the upper mold 101;

[0071] A support mechanism 12, which is installed at the bottom of the main body 1;

[0072] A negative pressure component 13, which is installed inside the main body 1.

[0073] The plastic suction mechanism 2 includes:

[0074] A connection component 21, which is arranged on the outer surface of the adsorption ring 201;

[0075] A sliding component 22, which is installed at the bottom of the adsorption ring 201;

[0076] A communication component 23, which is installed inside the sliding component 22;

[0077] A fixing component 24, which is installed inside the mold block 102.

[0078] The auxiliary mechanism 3 includes a plurality of fixing plates 301 fixedly connected to the top of the adsorption ring 201, and the auxiliary mechanism 3 includes:

[0079] A moving component 31, which is installed between the two fixing plates 301;

[0080] An extraction component 32, which is installed on the top of the extraction component 32 through a translation member.

[0081] The downward movement mechanism 11 includes an electric push rod 111 fixedly connected to the inner wall of the top of the upper mold 101, and the output end of the electric push rod 111 is fixedly connected with a moving frame 112;

[0082] The bottom of the moving frame 112 penetrates through the bottom outer wall of the upper mold 101 and extends to the outside, and the extended end of the moving frame 112 is fixedly connected with a convex template 113;

[0083] The support mechanism 12 includes a support frame 121 fixedly connected to the bottom of the main body 1, and two connecting pipes 122 are fixedly connected to the inner wall of the bottom of the support frame 121;

[0084] The negative pressure component 13 includes a negative pressure chamber 131 opened inside the main body 1;

[0085] Among them, a cooling box 132 is fixedly connected inside the main body 1, and two circulation pipes 133 are fixedly connected to the front of the cooling box 132;

[0086] Among them, the top of the connecting pipe 122 is communicatively connected to the inside of the negative pressure chamber 131. When the electric push rod 111 works, it will drive the convex template 113 to move downward through the moving frame 112. When the convex template 113 moves downward, it will push the plastic to flow into the mold block 102. Then, an external negative pressure device is started, so that the negative pressure extracts the air in the mold block 102 through the negative pressure assembly 13 and makes the plastic adhere to the inner wall of the mold block 102, completing the purpose of thermoforming the packaging box.

[0087] The connecting component 21 includes a first sealing ring 211 fixedly connected to the bottom of the adsorption ring 201;

[0088] The sliding component 22 includes two connecting cylinders 221 fixedly connected to the bottom of the adsorption ring 201. A piston rod 222 is fixedly connected to the inside of the connecting cylinder 221, and a return spring is fixedly connected to the inner wall of the top of the connecting cylinder 221;

[0089] The communicating component 23 includes a communicating pipe 231 slidably connected to the inside of the connecting cylinder 221;

[0090] Among them, the top of the communicating pipe 231 is fixedly connected to the bottom of the return spring. The inside of the communicating pipe 231 is tapered. When the external negative pressure device makes the inside of the negative pressure chamber 131 generate negative pressure, the formation of the negative pressure will extract the gas inside the communicating pipe 231 and the adsorption ring 201 through the central cylinder 232. When the gas inside the adsorption ring 201 is extracted, an adsorption force will be generated on the inside of the mold block 102 through a circle of adsorption holes in the upper part of the mold block 102.

[0091] A central cylinder 232 is fixedly connected between the two communicating pipes 231. The inside of the central cylinder 232 is tapered. A spring tapered shaft 233 is slidably connected to the inner wall of the bottom of the central cylinder 232;

[0092] The bottom of the central cylinder 232 is communicatively connected to the negative pressure chamber 131. The top of the central cylinder 232 fixedly penetrates through the inner wall of the bottom of the support frame 121;

[0093] The fixing component 24 includes an adsorption plate 242 slidably connected to the inside of the mold block 102. A cross shaft 241 is fixedly connected to the bottom of the adsorption plate 242. Then, when the convex template 113 drives some of the heated plastic to continue to move downward, it will push the top of the adsorption plate 242, so that the adsorption plate 242 pushes the spring tapered shaft 233 to move downward through the cross shaft 241.

[0094] Several fixing plates 301 are symmetrically distributed in pairs with the middle of the adsorption ring 201 as the center. Each group of fixing plates 301 is arranged at equal angles. Inclined grooves are provided on the side walls of the fixing plates 301;

[0095] The moving component 31 includes a short rod 311 slidably connected inside the inclined groove. A curved plate 312 is fixedly connected between the two short rods 311. The inside of the curved plate 312 is hollow, and a plurality of round holes are opened at the bottom of the curved plate 312.

[0096] Among them, a flexible layer 313 is fixedly connected to one side of the curved plate 312 close to the short rod 311. The bottom of the flexible layer 313 is fixedly connected to the top of the adsorption ring 201. The side wall of the curved plate 312 is rotatably connected to the outer surface of the mold block 102. When the connecting cylinder 221 slides downward, the piston rod 222 will slide downward in the conical channel in the communicating pipe 231. Subsequently, when the adsorption ring 201 slides downward, it will coincide with several adsorption holes at the lower part. At the same time, the piston rod 222 will cross the conical channel in the communicating pipe 231.

[0097] The translation component includes a rectangular box 321 arranged on the top of the curved plate 312. The side wall of the rectangular box 321 is fixedly connected inside the main body 1, and a plurality of conical holes are fixedly connected to the top of the rectangular box 321.

[0098] Among them, a hose is fixedly connected to one side of the rectangular box 321 close to the fixing plate 301. The hose is fixedly connected to the side wall of the curved plate 312. The rectangular box 321 is communicated with the inside of the curved plate 312 through two hoses.

[0099] The extraction component 32 includes a piston strip 322 slidably connected inside the rectangular box 321. The bottom of the piston strip 322 slides through the bottom outer wall of the rectangular box 321. A C-shaped frame 323 is fixedly connected to the side wall of the piston strip 322. An arc-shaped plate 324 is rotatably connected to the central axis of the C-shaped frame 323. A plurality of auxiliary springs are fixedly connected to the top of the piston strip 322. When the piston strip 322 moves downward, the downward movement of the piston strip 322 can adsorb a small amount of external air through a plurality of conical holes at the top, and can also adsorb the air inside the curved plate 312 through the hoses on both sides.

[0100] A method for using a plastic suction mold for a packaging box, the plastic suction mold for a packaging box, the method comprising the following steps:

[0101] S1: Place and close: First, place the heated plastic on the top of the main body 1, and then close the upper mold 101 and the main body 1.

[0102] S2: Pipe connection: Subsequently, connect the connecting pipe 122 to an external negative pressure device, and at the same time connect the two circulation pipes 133 to the circulation equipment of the water source and make the external water source circulate in the cooling box 132.

[0103] S3: Negative pressure thermoforming: Start the external negative pressure device, so that the negative pressure extracts the air in the mold block 102 through the negative pressure component 13 and makes the plastic adhere to the inner wall of the mold block 102, achieving the purpose of thermoforming the packaging box.

[0104] During use, first place the heated plastic on the top of the main body 1, then close the upper mold 101 with the main body 1. Subsequently, connect the connecting pipe 122 to the external negative pressure device, and at the same time connect the two circulation pipes 133 to the circulation equipment of the water source and make the external water source circulate in the cooling box 132. Then start the electric push rod 111. When the electric push rod 111 works, it will drive the convex template 113 to move downward through the moving frame 112. When the convex template 113 moves downward, it will push the plastic to flow into the mold block 102. Then start the external negative pressure device, so that the negative pressure extracts the air in the mold block 102 through the negative pressure component 13 and makes the plastic adhere to the inner wall of the mold block 102, achieving the purpose of thermoforming the packaging box.

[0105] When the external negative pressure device generates negative pressure inside the negative pressure chamber 131, the formation of the negative pressure will extract the gas inside the connecting pipe 231 and the adsorption ring 201 through the central cylinder 232. When the gas inside the adsorption ring 201 is extracted, it will generate an adsorption force on the inside of the mold block 102 through a circle of adsorption holes on the upper part of the mold block 102. At this time, the plastic driven by the downward movement of the convex template 113 will adhere to the inner wall main body 1 of the mold block 102 under the adsorption of the upper group of adsorption holes, and initially fill the inner wall of the mold block 102. Subsequently, when the convex template 113 drives some of the heated plastic to continue to move downward, it will push the top of the adsorption plate 242, so that the adsorption plate 242 pushes the spring conical shaft 233 to move downward through the cross shaft 241. At this time, part of the negative pressure will enter the bottom of the adsorption plate 242 through the central cylinder 232 and adsorb the bottom of the heated plastic at the bottom of the mold block 102. At this time, the heated plastic can be more completely adhered to the inner wall of the mold block 102. Through the phased adsorption of the adsorption ring 201 and the central cylinder 232 during thermoforming, it can make the negative pressure preferentially pull the plastic towards the inner wall of the mold block 102 when sucking the plastic through the adsorption ring 201, quickly fix the plastic at the edge position on the inner wall of the mold block 102, and reduce the situation of wrinkles and overlaps on the plastic surface when the plastic is pushed and flows downward. Subsequently, after the surface of the plastic adheres to the inner wall of the mold block 102, the adsorption at the bottom can make the plastic evenly extend to the bottom of the mold block 102, thereby reducing the situation of wrinkles or uneven deformation generated when the plastic is thermoformed in the adsorption ring 201, and thus enhancing the forming quality after thermoforming.

[0106] When the negative pressure sucks and forms the plastic through the adsorption holes in the upper part of the mold block 102 and the plastic blocks the adsorption holes, the continuous extraction of the negative pressure will drive the adsorption ring 201 to drive the two connecting cylinders 221 to slide downward through adsorption. When the connecting cylinder 221 slides downward, the piston rod 222 will slide downward in the conical channel in the connecting pipe 231. Subsequently, when the adsorption ring 201 slides downward, it will coincide with several adsorption holes at the bottom. At the same time, the piston rod 222 will cross the conical channel in the connecting pipe 231. After the adsorption ring 201 slides downward and separates from several adsorption holes at the top, the plastic adhering to the inner wall of the mold block 102 will separate from the adsorption force of the adsorption ring 201. At this time, the plastic adhering to the inner wall of the mold block 102 will flow synchronously when the convex template 113 pushes the plastic downward, thereby reducing the situation that the middle part of the plastic is over-pulled and deformed or even torn locally when the middle part of the plastic is pushed downward while the surface of the plastic is adsorbed and adheres to the upper part of the side wall of the mold block 102 for a long time, ensuring the integrity after vacuum forming and improving the molding quality of the product.

[0107] When the adsorption ring 201 slides downward, the piston strip 322 will slide downward under the elastic force of the auxiliary spring at the top. At the same time, the downward sliding of the adsorption ring 201 will drive the bending plate 312 to rotate towards the side wall of the mold block 102 through the fixed plate 301. At this time, the flexible layer 313 will form a sealing layer between the bottom of the bending plate 312 and the outer wall of the mold block 102 and the top of the adsorption ring 201. At the same time, when the bending plate 312 adheres to the outer wall of the mold block 102, it can cover several adsorption holes at the top of the mold block 102. Subsequently, when the piston strip 322 moves downward, the downward movement of the piston strip 322 can adsorb a small amount of external air through several conical holes at the top, and at the same time, it can also adsorb the air inside the bending plate 312 through the hoses on both sides. At this time, part of the adsorbed air will pass through several round holes on the side wall of the bending plate 312 and generate a certain adsorption force on the plastic surface adhering to the inside of the mold block 102 through the adsorption holes, thereby reducing the situation that the plastic rebounds locally due to local stress relaxation when the negative pressure generated by the adsorption ring 201 is separated from the adsorption on the surface of the plastic, and reducing the situation that the blister packaging box is deformed or locally sunken due to local rebound during vacuum forming, so as to further enhance the molding quality and molding efficiency of the packaging box during vacuum forming.

[0108] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A blister mold for a packaging box, comprising a main body (1), the inside of the main body (1) is hollow, and a plurality of mold blocks (102) are fixedly connected inside the main body (1). A plurality of adsorption holes are formed in the side wall of the mold block (102), and the plurality of adsorption holes are distributed at equal intervals in pairs. It is characterized in that, Further comprising; A thermoforming mechanism (2), which is installed inside the main body (1) and is used for thermoforming plastics; An auxiliary mechanism (3), which is installed on the top of the thermoforming mechanism (2) and is used to prevent the thermoformed plastics from rebounding; An adsorption ring (201) is slidably connected to the outer surface of the mold block (102), and two second sealing rings (212) are fixedly connected to the outer surface of the adsorption ring (201).

2. The plastic suction mold for a packaging box according to claim 1, characterized in that: The main body (1) includes an upper mold (101) slidably connected to the top of the main body (1), and the main body (1) includes: A downward movement mechanism (11), which is installed on the top of the upper mold (101); A support mechanism (12), which is installed at the bottom of the main body (1); A negative pressure assembly (13), which is installed inside the main body (1).

3. The blister mold for a packaging box according to claim 2, characterized in that: The thermoforming mechanism (2) includes: A connection assembly (21), which is arranged on the outer surface of the adsorption ring (201); A sliding assembly (22), which is installed at the bottom of the adsorption ring (201); A communication assembly (23), which is installed inside the sliding assembly (22); A fixing assembly (24), which is installed inside the mold block (102).

4. The blister mold for a packaging box according to claim 3, characterized in that: The auxiliary mechanism (3) includes a plurality of fixing plates (301) fixedly connected to the top of the adsorption ring (201), and the auxiliary mechanism (3) includes: A moving assembly (31), which is installed between the two fixing plates (301); An extraction assembly (32), which is installed on the top of the extraction assembly (32) through a translation member.

5. The plastic suction mold for a packaging box according to claim 4, characterized in that: The downward movement mechanism (11) includes an electric push rod (111) fixedly connected to the inner wall of the top of the upper mold (101), and the output end of the electric push rod (111) is fixedly connected to a moving frame (112); The bottom of the moving frame (112) penetrates through the outer wall of the bottom of the upper mold (101) and extends to the outside, and the extended end of the moving frame (112) is fixedly connected to a convex template (113); The support mechanism (12) includes a support frame (121) fixedly connected to the bottom of the main body (1), and two connecting pipes (122) are fixedly connected to the inner wall of the bottom of the support frame (121); The negative pressure assembly (13) includes a negative pressure chamber (131) opened inside the main body (1); Wherein, a cooling box (132) is fixedly connected inside the main body (1), and two circulation pipes (133) are fixedly connected to the front of the cooling box (132); Wherein, the top of the connecting pipe (122) is communicated with the inside of the negative pressure chamber (131).

6. The blister mold for a packaging box according to claim 5, wherein: The connection assembly (21) includes a first sealing ring (211) fixedly connected to the bottom of the adsorption ring (201); The sliding component (22) includes two connecting cylinders (221) fixedly connected to the bottom of the adsorption ring (201). A piston rod (222) is fixedly connected inside the connecting cylinder (221), and a return spring is fixedly connected to the inner wall of the top of the connecting cylinder (221). The communication component (23) includes a communication pipe (231) slidably connected inside the connecting cylinder (221). Among them, the top of the communication pipe (231) is fixedly connected to the bottom of the return spring, and the inside of the communication pipe (231) is tapered.

7. A blister mold for a packaging box according to claim 6, characterized in that: A central cylinder (232) is fixedly connected between the two communication pipes (231). The inside of the central cylinder (232) is tapered, and a spring tapered shaft (233) is slidably connected to the inner wall of the bottom of the central cylinder (232). The bottom of the central cylinder (232) is in communication with the negative pressure chamber (131), and the top of the central cylinder (232) fixedly penetrates through the inner wall of the bottom of the support frame (121). The fixing component (24) includes an adsorption plate (242) slidably connected inside the mold block (102), and a cross shaft (241) is fixedly connected to the bottom of the adsorption plate (242).

8. A plastic suction mold for a packaging box according to claim 7, characterized in that: Several fixing plates (301) are symmetrically distributed in groups of two with the middle of the adsorption ring (201) as the center. Each group of fixing plates (301) is arranged at equal angles, and inclined grooves are provided on the side walls of the fixing plates (301). The moving component (31) includes short rods (311) slidably connected inside the inclined grooves. A bending plate (312) is fixedly connected between the two short rods (311). The inside of the bending plate (312) is hollow, and several round holes are provided at the bottom of the bending plate (312). Among them, a flexible layer (313) is fixedly connected to one side of the bending plate (312) close to the short rod (311). The bottom of the flexible layer (313) is fixedly connected to the top of the adsorption ring (201), and the side wall of the bending plate (312) is rotatably connected to the outer surface of the mold block (102).

9. The plastic suction mold for a packaging box according to claim 8, characterized in that: The translation member includes a rectangular box (321) provided on the top of the bending plate (312). The side wall of the rectangular box (321) is fixedly connected inside the main body (1), and several tapered holes are fixedly connected to the top of the rectangular box (321). Among them, a hose is fixedly connected to one side of the rectangular box (321) close to the fixing plate (301). The hose is fixedly connected to the side wall of the bending plate (312), and the rectangular box (321) is in communication with the inside of the bending plate (312) through two hoses. The extraction component (32) includes a piston strip (322) slidably connected inside the rectangular box (321). The bottom of the piston strip (322) slidably penetrates through the outer wall of the bottom of the rectangular box (321). A C-shaped frame (323) is fixedly connected to the side wall of the piston strip (322). An arc plate (324) is rotatably connected to the middle axis of the C-shaped frame (323), and several auxiliary springs are fixedly connected to the top of the piston strip (322).

10. A method for using a plastic suction mold for a packaging box, characterized in that: Adopt the blister mold for the packaging box as described in claim 9. The method comprises the following steps: S1: Place and close: First, place the heated plastic on the top of the main body (1), and then close the upper mold (101) with the main body (1). S2: Pipe connection: Subsequently, connect the connecting pipe (122) to an external negative pressure device, and at the same time connect the two circulation pipes (133) to the circulation equipment of the water source and make the external water source circulate in the cooling box (132). S3: Negative pressure blistering: Start the external negative pressure device, so that the negative pressure extracts the air in the mold block (102) through the negative pressure component (13) and makes the plastic fit on the inner wall of the mold block (102), achieving the purpose of blistering the packaging box.

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