Plastic uptake forming device and method for plastic uptake cup production

Abstract

The invention discloses a blister forming device and method for blister cup production, and relates to the technical field of blister forming, the blister forming device comprises a supporting guide frame, and the top of the supporting guide frame is provided with a cutting moving part connected with a first special-shaped guide rail. By arranging the cutting moving part, when an upper mold moves upwards after plastic uptake forming of a cup, a rotating connecting shaft drives a rotating disc to rotate by 360 degrees, and when the rotating disc rotates, a connecting pin drives a U-shaped connecting frame to reciprocate up and down once through a limiting groove; when the U-shaped connecting frame moves downwards, the annular cutter moves downwards through the separation frame, so that the annular cutter presses and cuts the top edge of a cup subjected to plastic uptake forming, the cup is completely separated from a sheet, and when the U-shaped connecting frame moves upwards, the annular cutter is separated from the sheet. In this way, the sheet can be separated from the blister cup, and the blister cup is prevented from adhering to the sheet after being formed.

Description

Technical Field

[0001] The present invention relates to the technical field of thermoforming, and specifically relates to a thermoforming device and method for producing thermoformed cups. Background Art

[0002] Thermoforming, a plastic processing technology, the main principle of which is to heat and soften a flat plastic sheet and then vacuum adsorb it on the surface of a mold and form it after cooling. It is widely used in industries such as plastic packaging, lighting, advertising, and decoration. During the thermoforming process of a cup, the sheet is heated and softened, and is tightly attached to the surface of the core by vacuum pumping and formed in the cavity.

[0003] Generally, the heating and thermoforming of the sheet are achieved by the closing of the upper and lower molds. However, after the thermoforming of the cup is completed, there will still be a part of the cup connected to the sheet at the top edge. At this time, when the upper and lower molds are separated, the formed cup cannot fall into the lower mold due to the connection with the sheet, which will affect the winding of the sheet and also the production effect of the cup. Summary of the Invention

[0004] The purpose of the present invention is to provide a thermoforming device and method for producing thermoformed cups to solve the problem that the thermoformed cup cannot be completely separated from the sheet.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A thermoforming device for producing thermoformed cups, including a support and guide frame, on which an upper mold is sleeved, and a lower mold is sleeved below the upper mold on the support and guide frame. A side connection frame is installed on one side of the support and guide frame away from the upper mold and the lower mold. A telescopic cylinder is arranged on the side connection frame, and the output end of the telescopic cylinder is connected with a first special-shaped guide rail and a second special-shaped guide rail. A first connection pin slidably connected with the first special-shaped guide rail is arranged on one side of the upper mold, and a second connection pin slidably connected with the second special-shaped guide rail is arranged on one side of the lower mold. The first special-shaped guide rail is composed of a first horizontal section and a first inclined section, and the second special-shaped guide rail is composed of a second inclined section and a second horizontal section. A cutting and moving part connected with the first special-shaped guide rail is arranged at the top of the support and guide frame, and an air-introducing and adsorbing part is arranged at one end of the upper mold and the lower mold.

[0006] As a further solution of the present invention: The cutting and moving member includes a positioning block installed at the top of the support and guide frame. One end of the positioning block is rotatably connected by a bearing to a rotating connecting shaft extending to the other end of the positioning block. A turntable is installed at one end of the rotating connecting shaft close to the upper die. A connecting pin is provided on the turntable. A U-shaped connecting frame is connected to the turntable through the connecting pin. A limiting groove is opened on the U-shaped connecting frame. The connecting pin is slidably connected to the U-shaped connecting frame through the limiting groove. The bottom end of the U-shaped connecting frame is provided with a separating frame located between the upper die and the lower die. A through hole is opened on the separating frame. A ring cutter is provided at the bottom of the separating frame outside the through hole. A ratchet is provided on the outer side of the rotating connecting shaft. A first pawl meshing with the ratchet is rotatably connected to the top of the positioning block. A torsion spring is snap-fitted through a card slot at the connection between the positioning block and the first pawl. A positioning connecting shaft is provided at the end of the rotating connecting shaft away from the turntable. A second pawl is rotatably connected to the outer side of the positioning connecting shaft through a rotating shaft. A ratchet connecting ring is rotatably connected to the outer side of the positioning connecting shaft at the end of the rotating connecting shaft away from the turntable. A connecting frame is installed at the end of the ratchet connecting ring away from the rotating connecting shaft. A spur gear is provided at one end of the connecting frame. A shifting rack meshing with the spur gear is installed at the end of the first connecting pin away from the upper die.

[0007] As a further solution of the present invention: A slot fitting the separating frame is provided at the bottom of the upper die. The through hole corresponds to the cavities on the lower die and the upper die one by one.

[0008] As a further solution of the present invention: The width of the limiting groove is equal to the diameter of the connecting pin. The centers of the turntable and the connecting pin are in a misaligned state.

[0009] As a further solution of the present invention: A torsion spring is also snap-fitted through a card slot at the connection between the second pawl and the positioning connecting shaft. The orientation of the inner ratchet teeth of the ratchet connecting ring is opposite to the orientation of the outer ratchet teeth of the ratchet.

[0010] As a further solution of the present invention: The air extraction and suction accessory includes a positioning frame installed on the side of the side connecting frame away from the telescopic cylinder. A corrugated telescopic tube connected to the output end of the telescopic cylinder is provided inside the positioning frame. An activated carbon filter chamber connected to the corrugated telescopic tube is provided outside the positioning frame. A second one-way valve is installed on the outer wall of the activated carbon filter chamber. A hose is provided at the end of the second one-way valve away from the activated carbon filter chamber. An air extraction pipe connected to one end of the upper die and the lower die is provided at one end of the hose. A first one-way valve is provided at the end of the activated carbon filter chamber away from the corrugated telescopic tube.

[0011] As a further solution of the present invention: The intake end of the first one-way valve is connected to the activated carbon filter chamber. The intake end of the second one-way valve is connected to the hose.

[0012] As a further solution of the present invention: the horizontal length of the first horizontal section is equal to that of the second inclined section, the horizontal length of the first inclined section is equal to that of the second horizontal section, and the first inclined section is located above the second horizontal section.

[0013] As a further solution of the present invention: the diameter of the annular cutting tool is greater than the diameter of the through hole.

[0014] The present invention also discloses a thermoforming method for producing thermoformed cups, using the above-mentioned thermoforming device for producing thermoformed cups, including the following steps: S1: When the sheet moves between the lower mold and the upper mold, the telescopic cylinder is started, and the first inclined section is used to downwardly press the first connecting pin by the contraction of the telescopic cylinder, so as to move the upper mold downward. At this time, the second horizontal section cannot guide the second connecting pin. As the telescopic cylinder contracts, the first horizontal section contacts the first connecting pin. At this time, the upper mold cannot move downward. At the same time, the second inclined section upwardly presses and guides the second connecting pin, and the upper mold and the lower mold are moved to press the sheet by the movement of the upper mold and the lower mold; S2: Subsequently, the sheet is thermoformed by the operation of the upper mold and the lower mold; S3: Then, the upper mold and the lower mold are separated by the extension of the telescopic cylinder. During this process, the cutting moving member operates. At this time, part of the thermoformed cup will be separated from the sheet due to heat, and at the same time, it will fall into the lower mold. The cup connected to the sheet will be separated from the sheet by the cutting moving member, so as to prevent the cup from being connected to the sheet and affecting the production effect; S4: The air extraction and adsorption accessory is used to remove the peculiar smell generated by the heating of the sheet, and then the thermoformed cup inside the lower mold can be taken out by an external device.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting the cutting moving member, after the cup is thermoformed, the upper mold moves upward. At this time, due to the one-way limit of the second pawl on the ratchet chain, the ratchet chain can drive the positioning connecting shaft to rotate synchronously through the second pawl. In this way, the rotating connecting shaft can drive the turntable to rotate 360 degrees. When the turntable rotates, the connecting pin will drive the U-shaped connecting frame to perform a reciprocating up and down movement through the limit groove. When the U-shaped connecting frame moves downward, the annular cutting tool will move downward through the partition frame, so as to press and cut the top edge of the thermoformed cup by the annular cutting tool, so as to completely separate the cup from the sheet. When the U-shaped connecting frame moves upward, the annular cutting tool will be separated from the sheet. In this way, the separation of the sheet and the thermoformed cup can be realized, and the adhesion between the thermoformed cup and the sheet after forming can be prevented; 2. By setting an air-introducing and air-absorbing accessory, when the telescopic cylinder contracts, the upper mold and the lower mold are closed. At this time, the air between the upper mold and the lower mold will be discharged to the edges of the upper mold and the lower mold under the extrusion of the upper mold and the lower mold. At this time, the telescopic cylinder drives the corrugated telescopic tube to extend by contraction, so that the air around the upper mold and the lower mold enters the corrugated telescopic tube under the action of negative pressure through the air-introducing pipe, the hose, the second one-way valve, and the activated carbon filter bin. Thus, the activated carbon inside the activated carbon filter bin adsorbs the peculiar smell generated by the sheet due to heating, improving the safety of equipment use. When the telescopic cylinder extends, the filtered air inside the corrugated telescopic tube will be discharged through the activated carbon filter bin and the first one-way valve. In this way, the repeated extraction and purification of the peculiar smell around the upper mold and the lower mold can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a schematic structural diagram of the bottom of the upper mold of the present invention; Figure 3 is a schematic connection diagram of the U-shaped connecting frame and the telescopic cylinder of the present invention; Figure 4 is a schematic structural diagram of the partition frame of the present invention; Figure 5 is a schematic connection diagram of the U-shaped connecting frame and the rotating connecting shaft of the present invention; Figure 6 is a schematic connection diagram of the rotating connecting shaft and the positioning block of the present invention; Figure 7 is a schematic connection diagram of the first connecting pin and the first special-shaped guide rail of the present invention; Figure 8 is a schematic structural diagram of the air-introducing and air-absorbing accessory of the present invention.

[0017] In the figure: 1. Support and guide frame; 2. Upper mold; 3. Lower mold; 4. Partition frame; 5. U-shaped connecting frame; 6. Side connecting frame; 7. Telescopic cylinder; 8. First ratchet pawl; 9. Positioning frame; 10. Hose; 11. Shifting rack; 12. Ring cutter; 13. Air-introducing pipe; 14. Limiting groove; 15. First connecting pin; 16. Second connecting pin; 17. Through hole; 18. First special-shaped guide rail; 1801. First horizontal section; 1802. First inclined section; 19. Second special-shaped guide rail; 1901. Second inclined section; 1902. Second horizontal section; 20. First one-way valve; 21. Activated carbon filter bin; 22. Corrugated telescopic tube; 23. Second one-way valve; 24. Connecting pin; 25. Turntable; 26. Rotating connecting shaft; 27. Positioning block; 28. Ratchet; 29. Ratchet connecting ring; 30. Positioning connecting shaft; 31. Second ratchet pawl; 32. Straight gear; 33. Connecting frame; 34. Torsion spring. DETAILED DESCRIPTION OF THE INVENTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The embodiments of the present invention will be described below according to its overall structure.

[0020] Please refer to Figures 1 to 8 , in an embodiment of the present invention, a thermoforming device for producing thermoformed cups includes a support and guide frame 1, an upper mold 2 is sleeved on the support and guide frame 1, a lower mold 3 is sleeved on the support and guide frame 1 below the upper mold 2, a side connection frame 6 is installed on one side of the support and guide frame 1 away from the upper mold 2 and the lower mold 3, a telescopic cylinder 7 is arranged on the side connection frame 6, the output end of the telescopic cylinder 7 is connected with a first special-shaped guide rail 18 and a second special-shaped guide rail 19, a first connection pin 15 slidably connected with the first special-shaped guide rail 18 is arranged on one side of the upper mold 2, a second connection pin 16 slidably connected with the second special-shaped guide rail 19 is arranged on one side of the lower mold 3, the first special-shaped guide rail 18 is composed of a first horizontal section 1801 and a first inclined section 1802, the second special-shaped guide rail 19 is composed of a second inclined section 1901 and a second horizontal section 1902, a cutting and moving part connected with the first special-shaped guide rail 18 is arranged at the top of the support and guide frame 1, and an air-introducing and suction part is arranged at one end of the upper mold 2 and the lower mold 3.

[0021] In this embodiment: When the sheet moves between the lower mold 3 and the upper mold 2, the telescopic cylinder 7 is activated. By the contraction of the telescopic cylinder 7, the first inclined section 1802 presses the first connecting pin 15 downward, so as to move the upper mold 2 downward. At this time, the second horizontal section 1902 cannot guide the second connecting pin 16. As the telescopic cylinder 7 contracts, the first horizontal section 1801 contacts the first connecting pin 15. At this time, the upper mold 2 cannot move downward. At the same time, the second inclined section 1901 presses and guides the second connecting pin 16 upward, so that the upper mold 2 and the lower mold 3 move orderly, and at the same time, the accuracy of the docking of the upper mold 2 and the lower mold 3 is improved. By the movement of the upper mold 2 and the lower mold 3, the upper mold 2 and the lower mold 3 press the sheet. Then, the sheet is thermoformed through the operation of the upper mold 2 and the lower mold 3. After that, the upper mold 2 and the lower mold 3 are separated by the extension of the telescopic cylinder 7. During this process, the cutting moving part operates. At this time, part of the thermoformed cup will be separated from the sheet due to heat and fall into the lower mold 3, and the cup connected to the sheet will be separated from the sheet by the cutting moving part, so as to prevent the cup from being connected to the sheet and affecting the production effect. At the same time, the air-introducing suction accessory is used to remove the peculiar smell generated by the heating of the sheet. After that, the thermoformed cup inside the lower mold 3 can be taken out by an external device.

[0022] Please refer specifically to Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7The cutting moving part includes a positioning block 27 installed on the top of the supporting guide frame 1, one end of the positioning block 27 is rotatably connected to a rotating shaft 26 extending to the other end of the positioning block 27 through a bearing, a turntable 25 is installed at one end of the rotating shaft 26 close to the upper mold 2, a connecting pin 24 is arranged on the turntable 25, a U-shaped connecting frame 5 is connected to the turntable 25 through the connecting pin 24, a limiting groove 14 is arranged on the U-shaped connecting frame 5, and the connecting pin 24 is slidably connected to the U-shaped connecting frame 5 through the limiting groove 14, a partition frame 4 located between the upper mold 2 and the lower mold 3 is installed at the bottom end of the U-shaped connecting frame 5, a through hole 17 is arranged on the partition frame 4, and a ring cutter 12 located outside the through hole 17 is arranged at the bottom of the partition frame 4, and the outer part of the rotating shaft 26 is provided with a connecting pin 24, and a U-shaped connecting frame 5 is connected to the U-shaped connecting frame 5 through the connecting pin 24. A ratchet 28 is arranged on the side, and the top of the positioning block 27 is rotatably connected to the first pawl 8 meshing with the ratchet 28, and a torsion spring 34 is clamped at the connection between the positioning block 27 and the first pawl 8 through a slot, and a positioning coupling 30 is arranged at the end of the rotating coupling 26 away from the turntable 25, and the outer side of the positioning coupling 30 is rotatably connected to the second pawl 31 through a rotating shaft, and the end of the rotating coupling 26 away from the turntable 25 is rotatably connected to a ratchet chain 29 located on the outer side of the positioning coupling 30 through a bearing, and a connecting frame 33 is installed at the end of the ratchet chain 29 away from the rotating coupling 26, and a spur gear 32 is arranged at one end of the connecting frame 33, and a shifting rack 11 meshing with the spur gear 32 is installed at the end of the first connecting pin 15 away from the upper mold 2.

[0023] In this embodiment, the sheet passes through between the partition frame 4 and the lower mold 3. When the upper mold 2 moves downward, the shifting rack 11 shifts the spur gear 32 to rotate. Since the second pawl 31 cannot limit the ratchet link 29, the ratchet link 29 rotates relative to the rotating shaft 26. After the cup is blister-formed, the upper mold 2 moves upward. At this time, due to the unidirectional limit of the second pawl 31 on the ratchet link 29, the ratchet link 29 can drive the positioning shaft 30 to rotate synchronously through the second pawl 31, so that the rotating shaft 26 can drive The turntable 25 rotates 360 degrees. When the turntable 25 rotates, the connecting pin 24 will drive the U-shaped connecting frame 5 to move up and down through the limiting groove 14. When the U-shaped connecting frame 5 moves downward, the annular cutter 12 will move downward through the partition frame 4, so that the annular cutter 12 presses and cuts the top edge of the blister-formed cup, so that the cup is completely separated from the sheet. When the U-shaped connecting frame 5 moves upward, the annular cutter 12 will separate from the sheet, so that the sheet and the blister cup can be separated, preventing the blister cup from sticking to the sheet after forming.

[0024] Please refer to Figure 1 , Figure 2 , Figure 4 The bottom of the upper mold 2 is provided with a slot that matches the partition frame 4, and the through hole 17 corresponds to the cavity on the lower mold 3 and the upper mold 2 one by one.

[0025] In this embodiment, by setting this structure, when the upper die 2 moves downward, the annular cutter 12 is prevented from contacting the sheet material.

[0026] Please refer specifically to Figure 4 , Figure 5 , Figure 6 , the width of the limit groove 14 is equal to the diameter of the connecting pin 24, and the centers of the turntable 25 and the connecting pin 24 are in a misaligned state.

[0027] In this embodiment, by setting this structure, when the turntable 25 rotates 180 degrees, the connecting pin 24 drives the U-shaped connecting frame 5 to perform a reciprocating up and down movement once, so as to restore the cutting of the connection between the annular cutter 12 and the sheet material and the blister cup, thereby preventing the annular cutter 12 from hindering the movement of the subsequent sheet material.

[0028] Please refer specifically to Figure 5 , a torsion spring 34 is also clamped by a card slot at the connection between the second pawl 31 and the positioning connecting shaft 30, and the orientation of the inner ratchet teeth of the ratchet chain 29 is opposite to the orientation of the outer ratchet teeth of the ratchet 28.

[0029] In this embodiment, by setting this structure, the first pawl 8 limits the ratchet 28, preventing the rotating shaft 26 from rotating along the positioning block 27 when the ratchet chain 29 rotates relative to the rotating shaft 26, thereby improving the stability of the rotation of the rotating shaft 26.

[0030] Please refer specifically to Figure 2 , Figure 3 , Figure 7 , Figure 8 , the air induction and suction accessory includes a positioning frame 9 installed on the side of the side connecting frame 6 away from the telescopic cylinder 7. A corrugated telescopic tube 22 connected to the output end of the telescopic cylinder 7 is arranged inside the positioning frame 9. An activated carbon filter chamber 21 connected to the corrugated telescopic tube 22 is arranged outside the positioning frame 9. A second one-way valve 23 is installed on the outer wall of the activated carbon filter chamber 21. One end of the hose 10 is arranged at the end of the second one-way valve 23 away from the activated carbon filter chamber 21. One end of the hose 10 is provided with an air induction pipe 13 connected to one end of the upper die 2 and the lower die 3. A first one-way valve 20 is arranged at the end of the activated carbon filter chamber 21 away from the corrugated telescopic tube 22.

[0031] In this embodiment: When the telescopic cylinder 7 contracts, the upper mold 2 and the lower mold 3 are closed. At this time, the air between the upper mold 2 and the lower mold 3 will be discharged to the edges of the upper mold 2 and the lower mold 3 under the extrusion of the upper mold 2 and the lower mold 3. At this time, the telescopic cylinder 7 drives the corrugated telescopic tube 22 to extend by contraction, so that the air around the upper mold 2 and the lower mold 3 enters the corrugated telescopic tube 22 under the action of negative pressure through the air guide pipe 13, the hose 10, the second one-way valve 23, and the activated carbon filter bin 21. Thus, the activated carbon inside the activated carbon filter bin 21 adsorbs the peculiar smell generated by the sheet due to heat, improving the safety of equipment use. When the telescopic cylinder 7 extends, the filtered air inside the corrugated telescopic tube 22 will be discharged through the activated carbon filter bin 21 and the first one-way valve 20. In this way, the repeated extraction and purification of the peculiar smell around the upper mold 2 and the lower mold 3 can be realized.

[0032] Please refer specifically to Figure 7 、 Figure 8 , the air inlet end of the first one-way valve 20 is connected to the activated carbon filter bin 21, and the air inlet end of the second one-way valve 23 is connected to the hose 10.

[0033] In this embodiment: By setting this structure, the air can only enter the activated carbon filter bin 21 from the hose 10, realizing the one-way flow of the air inside the corrugated telescopic tube 22.

[0034] Please refer specifically to Figure 7 , the horizontal length of the first horizontal section 1801 is equal to that of the second inclined section 1901, the horizontal length of the first inclined section 1802 is equal to that of the second horizontal section 1902, and the first inclined section 1802 is located above the second horizontal section 1902.

[0035] In this embodiment: By setting this structure, the orderly movement of the upper mold 2 and the lower mold 3 is realized, thereby reducing the friction and wear between the molds and prolonging the service life of the molds.

[0036] Please refer specifically to Figure 4 , the diameter of the annular cutter 12 is larger than that of the through hole 17.

[0037] In this embodiment: By setting this structure, it is prevented that the through hole 17 and the annular cutter 12 hinder the closing of the upper mold 2 and the lower mold 3.

[0038] The following provides a thermoforming method for producing a thermoformed cup in combination with the above-mentioned thermoforming device for producing a thermoformed cup, which specifically includes the following steps: S1: When the sheet moves to between the lower mold 3 and the upper mold 2, the telescopic cylinder 7 is started, and the first inclined section 1802 is squeezed downward on the first connecting pin 15 by the contraction of the telescopic cylinder 7, so that the upper mold 2 moves downward. When the upper mold 2 moves downward, the shifting rack 11 shifts the spur gear 32 to rotate. Since the second pawl 31 cannot limit the ratchet chain 29, the ratchet chain 29 rotates relative to the rotating shaft 26. At this time, the second horizontal section 1902 cannot guide the second connecting pin 16. As the telescopic cylinder 7 contracts, the first horizontal section 1801 contacts the first connecting pin 15. At this time, the upper mold 2 cannot move downward. At the same time, the second inclined section 1901 squeezes and guides the second connecting pin 16 upward, and the upper mold 2 and the lower mold 3 are pressed against the sheet by the movement of the upper mold 2 and the lower mold 3; S2: The sheet is then vacuum-formed by the operation of the upper mold 2 and the lower mold 3; S3: After the cup is blister-formed, the upper mold 2 is moved upward. At this time, due to the one-way limitation of the ratchet link 29 by the second pawl 31, the ratchet link 29 can drive the positioning coupling 30 to rotate synchronously through the second pawl 31, so that the rotating coupling 26 can drive the turntable 25 to rotate 360 ​​degrees. When the turntable 25 rotates, the connecting pin 24 will drive the U-shaped connecting frame 5 to move up and down through the limiting groove 14. When the U-shaped connecting frame 5 moves downward, the annular cutter 12 will move downward through the partition frame 4, so that the annular cutter 12 presses and cuts the top edge of the blister-formed cup, so that the cup is completely separated from the sheet. When the U-shaped connecting frame 5 moves upward, the annular cutter 12 will separate from the sheet, so that the sheet and the blister cup can be separated, and the blister cup can be prevented from sticking to the sheet after forming. S4: When the telescopic cylinder 7 contracts again, the upper mold 2 and the lower mold 3 are closed. At this time, the air between the upper mold 2 and the lower mold 3 will be discharged to the edges of the upper mold 2 and the lower mold 3 under the squeezing of the upper mold 2 and the lower mold 3. At this time, the telescopic cylinder 7 drives the bellows 22 to extend by contraction, so that the air around the upper mold 2 and the lower mold 3 enters the bellows 22 through the air duct 13, the hose 10, the second one-way valve 23, and the activated carbon filter bin 21 under the action of negative pressure, so that the activated carbon inside the activated carbon filter bin 21 can absorb the odor generated by the heat of the sheet, thereby improving the safety of the equipment. When the telescopic cylinder 7 is extended, the filtered air inside the bellows 22 will be discharged through the activated carbon filter bin 21 and the first one-way valve 20, so that the repeated extraction and purification of the odor around the upper mold 2 and the lower mold 3 can be achieved.

[0039] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A blister forming device for producing blister cups, comprising a support guide frame (1), characterized in that: An upper mold (2) is sleeved on the support guide frame (1), and a lower mold (3) located below the upper mold (2) is sleeved on the support guide frame (1). A side connecting frame (6) is installed on the side of the support guide frame (1) away from the upper mold (2) and the lower mold (3). A telescopic cylinder (7) is provided on the side connecting frame (6). The output end of the telescopic cylinder (7) is connected to a first special-shaped guide rail (18) and a second special-shaped guide rail (19). A first connecting pin (19) slidably connected to the first special-shaped guide rail (18) is provided on one side of the upper mold (2). 15), a second connecting pin (16) slidably connected to a second special-shaped guide rail (19) is provided on one side of the lower mold (3), the first special-shaped guide rail (18) is composed of a first horizontal section (1801) and a first inclined section (1802), the second special-shaped guide rail (19) is composed of a second inclined section (1901) and a second horizontal section (1902), a cutting moving part connected to the first special-shaped guide rail (18) is provided on the top of the support guide frame (1), and an air entrainment adsorption part is provided at one end of the upper mold (2) and the lower mold (3).

2. A blister forming device for producing blister cups according to claim 1, characterized in that: The cutting moving member comprises a positioning block (27) mounted on the top of the supporting guide frame (1); one end of the positioning block (27) is rotatably connected to a rotating shaft (26) extending to the other end of the positioning block (27) via a bearing; a rotating disk (25) is mounted on the end of the rotating shaft (26) close to the upper mold (2); a connecting pin (24) is arranged on the rotating disk (25); a U-shaped connecting frame (5) is connected to the rotating disk (25) via the connecting pin (24); a limiting groove (14) is provided on the U-shaped connecting frame (5); the connecting pin (24) is slidably connected to the U-shaped connecting frame (5) via the limiting groove (14); a partition frame (4) located between the upper mold (2) and the lower mold (3) is mounted at the bottom end of the U-shaped connecting frame (5); a through hole (17) is provided on the partition frame (4); an annular cutter (12) located outside the through hole (17) is arranged at the bottom of the partition frame (4); the rotating shaft (2 6), a ratchet wheel (28) is arranged on the outer side of the positioning block (27), a first pawl (8) meshing with the ratchet wheel (28) is rotatably connected to the top of the positioning block (27), a torsion spring (34) is clamped at the connection between the positioning block (27) and the first pawl (8) through a clamping groove, a positioning coupling shaft (30) is arranged at the end of the rotating coupling shaft (26) away from the rotating disk (25), a second pawl (31) is rotatably connected to the outer side of the positioning coupling shaft (30) through a rotating shaft, an end of the rotating coupling shaft (26) away from the rotating disk (25) is rotatably connected to a ratchet chain (29) located on the outer side of the positioning coupling shaft (30) through a bearing, a connecting frame (33) is installed at the end of the ratchet chain (29) away from the rotating coupling shaft (26), a spur gear (32) is arranged at one end of the connecting frame (33), and a shifting rack (11) meshing with the spur gear (32) is installed at the end of the first connecting pin (15) away from the upper mold (2).

3. A blister forming device for producing blister cups according to claim 2, characterized in that: The bottom of the upper mold (2) is provided with a slot that matches the partition frame (4), and the through hole (17) corresponds one-to-one with the cavities on the lower mold (3) and the upper mold (2).

4. The blister forming device for producing blister cups according to claim 2, characterized in that: The width of the limiting groove (14) is equal to the diameter of the connecting pin (24), and the centers of the rotating disk (25) and the connecting pin (24) are in a misaligned state.

5. The blister forming device for producing blister cups according to claim 2, characterized in that: The connection between the second pawl (31) and the positioning shaft (30) is also clamped with a torsion spring (34) via a clamping groove, and the direction of the ratchet teeth on the inner side of the ratchet link (29) is opposite to the direction of the ratchet teeth on the outer side of the ratchet (28).

6. The blister forming device for producing blister cups according to claim 2, characterized in that: The bleed air adsorption component comprises a positioning frame (9) installed on a side of the side connecting frame (6) away from the telescopic cylinder (7); a corrugated telescopic pipe (22) connected to the output end of the telescopic cylinder (7) is arranged on the inner side of the positioning frame (9); an activated carbon filter chamber (21) connected to the corrugated telescopic pipe (22) is arranged on the outer side of the positioning frame (9); a second one-way valve (23) is installed on the outer wall of the activated carbon filter chamber (21); a hose (10) is arranged at one end of the second one-way valve (23) away from the activated carbon filter chamber (21); an bleed air pipe (13) connected to one end of the upper mold (2) and the lower mold (3) is arranged at one end of the hose (10); and a first one-way valve (20) is arranged at one end of the activated carbon filter chamber (21) away from the corrugated telescopic pipe (22).

7. A blister forming device for producing blister cups according to claim 6, characterized in that: The air inlet end of the first one-way valve (20) is connected to the activated carbon filter bin (21), and the air inlet end of the second one-way valve (23) is connected to the hose (10).

8. The blister forming device for producing blister cups according to claim 1, characterized in that: The first horizontal section (1801) and the second inclined section (1901) have the same horizontal length, the first inclined section (1802) and the second horizontal section (1902) have the same horizontal length, and the first inclined section (1802) is located above the second horizontal section (1902).

9. The blister forming device for producing blister cups according to claim 6, characterized in that: The diameter of the annular cutter (12) is greater than the diameter of the through hole (17).

10. A blister forming method for producing blister cups, characterized in that: A blister forming device for producing blister cups according to any one of claims 1 to 9 comprises the following steps: S1: When the sheet moves to between the lower mold (3) and the upper mold (2), the telescopic cylinder (7) is started, and the first inclined section (1802) is pressed downwardly on the first connecting pin (15) by the contraction of the telescopic cylinder (7), so that the upper mold (2) moves downward. At this time, the second horizontal section (1902) cannot guide the second connecting pin (16). As the telescopic cylinder (7) contracts, the first horizontal section (1801) contacts the first connecting pin (15). At this time, the upper mold (2) cannot move downward. At the same time, the second inclined section (1901) presses and guides the second connecting pin (16) upward. By moving the upper mold (2) and the lower mold (3), the upper mold (2) and the lower mold (3) press the sheet. S2: Subsequently, the sheet is subjected to vacuum forming through the operation of the upper mold (2) and the lower mold (3); S3: The upper mold (2) and the lower mold (3) are then separated by extending the telescopic cylinder (7). During this process, the cutting moving part operates. At this time, part of the cup formed by the vacuum evaporation is separated from the sheet due to heat and falls into the lower mold (3). The cup connected to the sheet is separated from the sheet by the cutting moving part, thereby preventing the cup from being connected to the sheet and affecting the production effect. S4: The odor generated by the heating of the sheet is removed by an air entrainment adsorption component, and then the cup formed by vacuum forming in the lower mold (3) can be taken out by an external device.

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