A cooling and molding device for plastic film used in a blow molding machine

Abstract

The present invention belongs to the technical field of plastic film processing equipment, and specifically discloses a cooling and forming equipment for a plastic film for a blow molding machine, comprising a blow molding machine body, wherein the top of the blow molding machine body is fixedly connected to a mounting shell, and the top of the blow molding machine body is also provided with a blow molding structure located on the inner side of the mounting shell; by providing the cooling structure, when the air pressure in one of the connecting holes is lower than the air pressure in the connecting holes at other positions, the inner wall of the mounting ring is limited so that it cannot tilt, thereby causing the position of the overall connecting rod to slide downward, thereby adjusting the position of the sealing ring and the baffle, thereby ensuring that the wind pressure of the cooling gas discharged from different exhaust holes is equal, avoiding the situation where the films are adhered to each other due to the different wind pressures of the discharged cooling gas, effectively improving the product quality, and the cooling gas discharged from the exhaust holes at various positions can cool the film more evenly, thereby improving the cooling effect.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic film processing equipment, and specifically discloses a cooling and molding device for a plastic film used in a blow molding machine. Background Art

[0002] PE film blowing machine is a mechanical equipment that blows heated and molten PE plastic melt into film; the molten plastic comes out from the die through the machine head, and after being inflated and cooled by the air ring, it is pressed by a herringbone plate, and the finished film is rolled into a tube by the traction roller. At present, the cooling method for plastic film mainly adopts the annular cooling method of air ring cooling, but due to the different introduction positions of the gas introduced into the air ring, the gas is discharged through different exhaust holes at different distances, resulting in different wind pressures of the discharged cooling gas, which makes the film easy to stick and affects the product quality. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is to propose a cooling and molding device for plastic film for a blow molding machine to solve the problem in the prior art that the film is easily adhered due to the different wind pressures of the cooling gas discharged, which affects the product quality.

[0004] To achieve the above purpose, the present invention provides a cooling and molding device for a plastic film for a blow molding machine, comprising a blow molding machine body, a mounting shell is fixedly connected to the top of the blow molding machine body, a blow molding structure located inside the mounting shell is arranged on the top of the blow molding machine body, an air inlet pipe is connected to one side of the mounting shell, a mounting ring is arranged on the top of the mounting shell, and a cooling structure is arranged inside the mounting ring;

[0005] Wherein, the cooling structure comprises a condenser tube arranged inside the mounting shell, and a slow flow component is arranged on the surface of the condenser tube;

[0006] The top of the installation shell is provided with evenly distributed connection holes, the inner wall of the connection hole is provided with a mounting column, the surface of the mounting column is slidably connected with a sealing ring, and the surface of the mounting column is provided with a through groove;

[0007] The inner wall of the mounting ring is slidably connected with a connecting ring, the surface of the sealing ring is fixedly connected with an adjusting plate, a connecting rod is fixedly connected between the adjusting plate and the connecting ring, and a plurality of groups of evenly distributed exhaust holes are opened on the inner side of the mounting ring;

[0008] Two mounting rods symmetrically distributed with the exhaust hole as the center are fixedly connected to the top of the connecting ring, and evenly distributed mounting strips are fixedly connected between the two mounting rods, and a baffle is fixedly connected to the bottom of the mounting strips.

[0009] In the above technical solution, preferably, the condenser is arranged in a spiral shape, and the liquid inlet end and the liquid outlet end of the condenser both pass through the mounting shell.

[0010] In the above technical solution, preferably, the slow flow component includes a mounting plate evenly distributed and fixedly connected to the surface of the condenser, the surface of the mounting plate is provided with evenly distributed through holes, and a partition plate is fixedly connected between two adjacent mounting plates, the surface of the partition plate is provided with evenly distributed through holes.

[0011] In the above technical solution, preferably, a diversion cavity is formed between the bottom of the partition plate and the interior of the mounting shell, a cooling cavity is formed between the top of the partition plate and the interior of the mounting shell, the air inlet pipe is connected to the diversion cavity, and the connecting hole is connected to the cooling cavity.

[0012] In the above technical solution, preferably, one end of the mounting column is fixedly connected to a fixing plate fixedly connected to the inner wall of the connecting hole, the top of the sealing ring is fixedly connected to a spring, and the top of the spring is fixedly connected to the surface of the fixing plate.

[0013] In the above technical solution, preferably, a connecting cavity connected to the connecting hole is opened inside the mounting ring, the exhaust hole is connected to the connecting cavity, the number of exhaust holes in each group is not less than four, the lower end of the baffle extends to the interior of the exhaust hole, and the mounting strips and the exhaust holes are staggered.

[0014] In the above technical solution, preferably, the blow molding structure includes a guide block arranged on the top of the blow molding machine body, the top of the guide block is fixedly connected with a connecting block, the connection between the connecting block and the guide block is fixedly connected with a guide ring, the interior of the connecting block is provided with a cavity, and the surface of the connecting block is provided with air inlet grooves that are evenly distributed and connected to the cavity.

[0015] In the above technical solution, preferably, a connecting column is fixedly connected to the top of the connecting block, a connecting channel connected to the cavity is opened inside the connecting column, a fan is arranged inside the connecting channel, a contraction section is formed at the upper end of the connecting column, and blowing holes evenly distributed and connected to the connecting channel are opened on the surface of the connecting column.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By setting up a cooling structure, when the air pressure in one of the connecting holes is lower than the air pressure in the connecting holes at other positions, the inner wall of the mounting ring is restricted so that it cannot tilt, causing the position of the overall connecting rod to slide downward, and then the position of the sealing ring and the baffle to be adjusted, thereby ensuring that the wind pressure of the cooling gas discharged from different exhaust holes is equal, avoiding the adhesion between the films due to the different wind pressures of the discharged cooling gas, effectively improving the product quality, and the cooling gas discharged from the exhaust holes at each position can cool the film more evenly, thereby improving the cooling effect.

[0018] While maintaining the blowing effect on the film, the blow molding structure uses the guide ring to make the plastic film move close to the air inlet groove. Under the action of the guide ring, it actively expands outward and maintains a good distance from the air inlet groove, so that an air film can be formed during the gas circulation process to prevent the plastic film from being sucked into the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a partial cross-sectional schematic diagram of the present invention;

[0021] Figure 3 It is a schematic diagram of the connection between the cooling structure and the mounting ring of the present invention;

[0022] Figure 4 It is a schematic diagram of the connection between the fixing plate and the connecting hole of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection between the baffle and the exhaust hole of the present invention;

[0024] Figure 6 It is a partial cross-sectional schematic diagram of the hammer stone structure of the present invention;

[0025] Figure 7 for Figure 4 A is an enlarged view of the middle image.

[0026] In the figure: 1. Blow molding machine body; 101. Mounting shell; 102. Air inlet pipe; 103. Mounting ring; 2. Blow molding structure; 201. Guide block; 202. Air inlet groove; 203. Guide ring; 204. Connecting block; 205. Connecting column; 206. Fan; 207. Blowing hole; 208. Contraction section; 209. Connecting channel; 3. Cooling structure; 301. Condenser; 302. Mounting plate; 303. Partition plate; 304. Through hole; 305. Through hole; 306. Connecting hole; 307. Through groove; 308. Mounting column; 309. Sealing ring; 310. Spring; 311. Adjusting plate; 312. Connecting rod; 313. Connecting ring; 314. Connecting cavity; 315. Mounting rod; 316. Exhaust hole; 317. Baffle; 318. Mounting strip; 319. Fixing plate. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1-Figure 7 A cooling and molding device for a plastic film for a blow molding machine is shown, comprising a mounting shell 101 fixedly connected to the top of a blow molding machine body 1, a blow molding structure 2 located inside the mounting shell 101 is arranged on the top of the blow molding machine body 1, an air inlet pipe 102 is connected to one side of the mounting shell 101, a mounting ring 103 is arranged on the top of the mounting shell 101, and a cooling structure 3 is arranged inside the mounting ring 103;

[0030] The cooling structure 3 includes a condenser tube 301 disposed inside the mounting shell 101, and a slow flow component is disposed on the surface of the condenser tube 301;

[0031] The top of the mounting shell 101 is provided with evenly distributed connection holes 306, the inner wall of the connection hole 306 is provided with a mounting column 308, the surface of the mounting column 308 is slidably connected with a sealing ring 309, and the surface of the mounting column 308 is provided with a through groove 307;

[0032] The inner wall of the mounting ring 103 is slidably connected with a connecting ring 313, the surface of the sealing ring 309 is fixedly connected with an adjusting plate 311, a connecting rod 312 is fixedly connected between the adjusting plate 311 and the connecting ring 313, and a plurality of evenly distributed exhaust holes 316 are opened on the inner side of the mounting ring 103;

[0033] Two mounting rods 315 symmetrically distributed around the exhaust hole 316 are fixedly connected to the top of the connecting ring 313 , evenly distributed mounting strips 318 are fixedly connected between the two mounting rods 315 , and a baffle 317 is fixedly connected to the bottom of the mounting strips 318 .

[0034] Specifically, the other end of the air inlet pipe 102 should be connected to a device for introducing cooling gas, and the condenser pipe 301 is used for the circulation of cooling medium.

[0035] like Figure 1-Figure 7 As shown, the condenser tube 301 is arranged in a spiral shape, and the liquid inlet end and the liquid outlet end of the condenser tube 301 both penetrate the installation shell 101.

[0036] The slow flow component includes a mounting plate 302 evenly distributed and fixedly connected to the surface of the condenser 301, the surface of the mounting plate 302 is provided with evenly distributed through holes 305, and a partition plate 303 is fixedly connected between two adjacent mounting plates 302, the surface of the partition plate 303 is provided with evenly distributed through holes 304.

[0037] A flow-dividing cavity is formed between the bottom of the partition plate 303 and the interior of the mounting shell 101 , a cooling cavity is formed between the top of the partition plate 303 and the interior of the mounting shell 101 , the air inlet pipe 102 is connected to the flow-dividing cavity, and the connecting hole 306 is connected to the cooling cavity.

[0038] The gas used to cool the plastic film is introduced into the interior of the diversion cavity through the air inlet pipe 102. Under the joint action of the partition plate 303, the through hole 304, the mounting plate 302 and the through hole 305, the rapidly injected gas can be blocked and the flow rate can be reduced so that it can fully contact the condenser 301, thereby cooling the gas under the action of the cooling medium flowing inside the condenser 301, thereby improving the subsequent cooling effect.

[0039] like Figure 1-Figure 7 As shown, one end of the mounting column 308 is fixedly connected to a fixing plate 319 fixedly connected to the inner wall of the connecting hole 306 , the top of the sealing ring 309 is fixedly connected to a spring 310 , and the top of the spring 310 is fixedly connected to the surface of the fixing plate 319 .

[0040] In the above technical solution, preferably, a connecting cavity 314 connected to the connecting hole 306 is opened inside the mounting ring 103, the exhaust holes 316 are connected to the connecting cavity 314, the number of each group of exhaust holes 316 is not less than four, the lower end of the baffle 317 extends to the interior of the exhaust holes 316, and the mounting strips 318 and the exhaust holes 316 are staggered.

[0041] The cooled gas can enter the interior of the connecting hole 306 along the cooling cavity. As the gas injected into the connecting hole 306 increases, the sealing ring 309 can be pushed upward to compress the spring 310. When the sealing ring 309 moves to the opening of the through groove 307 on the surface of the mounting column 308, the gas can bypass the sealing ring 309 through the through groove 307 and be introduced into the interior of the connecting cavity 314. In this process, the spring 310 can reduce part of the gas pressure, making the subsequent gas pressure discharged through the exhaust hole 316 more uniform, thereby avoiding excessive pressure of the cooling air causing the film to swell. In the process of the sealing ring 309 moving, the adjusting plate 311 can be driven to move synchronously, thereby driving the connecting rod 312 to move upward, and the moving height of the connecting rod 312 is determined by the sealing ring 309 connected thereto, and the connecting ring 313 slides with the inner wall of the mounting ring 103 as a whole and is restricted by the inner wall of the mounting ring 103, so that the multiple connecting rods 312 can only move up and down synchronously, and the mounting rod 315 moves together with the mounting ring 103 to drive the baffle 317 to move synchronously, thereby realizing the process of moving the sealing ring 309 upward. During the process, the position of the baffle 317 is adjusted by adjusting the plate 311, the connecting rod 312, the mounting rod 315 and the mounting strip 318, so that it no longer blocks the exhaust hole 316 to facilitate the discharge of gas, thereby realizing the cooling of the film. When the air pressure in one of the connecting holes 306 is lower than the air pressure in the connecting holes 306 at other positions (due to the different air inlet positions, the gas flow distances are different, resulting in the difference in air pressure in the connecting holes 306 at different positions), it can be tilted to the lowest air pressure point under the action of the connecting ring 313, but due to the mounting ring 103 The restriction of the inner wall prevents it from tilting and causing the downward sliding of the integral connecting rod 312 to adjust the position, and the position of the sealing ring 309 is adjusted by adjusting the adjustment plate 311. At the same time, the blocking area of ​​the baffle 317 on the exhaust hole 316 is changed to ensure that the wind pressure of the cooling gas discharged from different exhaust holes 316 is equal, avoiding the adhesion between the films due to the different wind pressures of the discharged cooling gas, effectively improving the product quality, and the cooling gas discharged from the exhaust holes 316 at each position can cool the film more evenly, thereby improving the cooling effect.

[0042] like Figure 1-Figure 7 As shown, the blow molding structure 2 includes a guide block 201 arranged on the top of the blow molding machine body 1, the top of the guide block 201 is fixedly connected with a connecting block 204, the connection between the connecting block 204 and the guide block 201 is fixedly connected with a guide ring 203, the interior of the connecting block 204 is provided with a cavity, and the surface of the connecting block 204 is provided with air inlet grooves 202 which are evenly distributed and connected with the cavity.

[0043] A connecting column 205 is fixedly connected to the top of the connecting block 204, and a connecting channel 209 connected to the cavity is opened inside the connecting column 205. A fan 206 is arranged inside the connecting channel 209. A contraction section 208 is formed at the upper end of the connecting column 205, and blowing holes 207 evenly distributed and connected to the connecting channel 209 are opened on the surface of the connecting column 205.

[0044] By starting the fan 206, gas can be injected into the connecting channel 209 and discharged through the blowing hole 207 to achieve film blowing. The discharged gas is recovered through the air inlet groove 202 to form a gas circulation. By setting the guide ring 203, when the plastic film moves to the vicinity of the air inlet groove 202, it actively expands outward under the action of the guide ring 203, maintaining a good distance from the air inlet groove 202, so that an air film can be formed during the gas circulation process to prevent the plastic film from being sucked into the cavity.

[0045] Working principle: The gas used to cool the plastic film is introduced into the diversion cavity through the air inlet pipe 102. Under the joint action of the partition plate 303, the through hole 304, the mounting plate 302 and the through hole 305, the rapidly injected gas can be blocked, the flow rate can be reduced, and it can fully contact with the condenser tube 301, so that the gas is cooled down under the action of the cooling medium flowing inside the condenser tube 301, and the subsequent cooling effect is improved. The cooled gas can enter the inside of the connecting hole 306 along the cooling cavity, and then be discharged through the exhaust hole 316 to cool the film. Under the action of the cooling structure 3, the wind pressure of the cooling gas discharged from different exhaust holes 316 can be guaranteed to be equal, avoiding the exhaust gas. The different wind pressures of the cooling gas cause adhesion between the films, which effectively improves the product quality. The cooling gas discharged from the exhaust holes 316 at various positions can cool the film more evenly, thereby improving the cooling effect. By starting the fan 206, the gas can be injected into the connecting channel 209 and discharged through the blowing holes 207 to achieve film blowing. The exhausted gas is recovered through the air inlet groove 202 to form a gas circulation. By setting the guide ring 203, when the plastic film moves to a position close to the air inlet groove 202, it actively expands outward under the action of the guide ring 203, maintaining a good distance from the air inlet groove 202, so that an air film can be formed during the gas circulation process to prevent the plastic film from being sucked into the cavity.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A cooling and molding device for a plastic film for a blow molding machine, comprising a blow molding machine body (1), characterized in that: The top of the blow molding machine body (1) is fixedly connected to a mounting shell (101); the top of the blow molding machine body (1) is also provided with a blow molding structure (2) located inside the mounting shell (101); one side of the mounting shell (101) is connected to an air inlet pipe (102); the top of the mounting shell (101) is provided with a mounting ring (103); and a cooling structure (3) is provided inside the mounting ring (103); The cooling structure (3) comprises a condenser tube (301) arranged inside the mounting shell (101), and a slow-flow component is arranged on the surface of the condenser tube (301); The top of the installation shell (101) is provided with evenly distributed connection holes (306), the inner wall of the connection hole (306) is provided with a mounting column (308), the surface of the mounting column (308) is slidably connected with a sealing ring (309), and the surface of the mounting column (308) is provided with a through groove (307); The inner wall of the mounting ring (103) is slidably connected to a connecting ring (313); the surface of the sealing ring (309) is fixedly connected to an adjusting plate (311); a connecting rod (312) is fixedly connected between the adjusting plate (311) and the connecting ring (313); and a plurality of groups of evenly distributed exhaust holes (316) are provided on the inner side of the mounting ring (103); Two mounting rods (315) are fixedly connected to the top of the connection ring (313) and are symmetrically distributed around the exhaust hole (316), and evenly distributed mounting strips (318) are fixedly connected between the two mounting rods (315), and a baffle (317) is fixedly connected to the bottom of the mounting strips (318); The condenser tube (301) is arranged in a spiral shape, and the liquid inlet end and the liquid outlet end of the condenser tube (301) both penetrate the mounting shell (101); The slow flow assembly comprises a mounting plate (302) evenly distributed and fixedly connected to the surface of the condenser tube (301), the surface of the mounting plate (302) being provided with evenly distributed through holes (305), and a partition plate (303) being fixedly connected between two adjacent mounting plates (302), the surface of the partition plate (303) being provided with evenly distributed through holes (304); A flow-dividing cavity is formed between the bottom of the partition plate (303) and the interior of the mounting shell (101), a cooling cavity is formed between the top of the partition plate (303) and the interior of the mounting shell (101), the air inlet pipe (102) is connected to the flow-dividing cavity, and the connecting hole (306) is connected to the cooling cavity; The blow molding structure (2) comprises a guide block (201) arranged on the top of the blow molding machine body (1); a connecting block (204) is fixedly connected to the top of the guide block (201); a guide ring (203) is fixedly connected to the connection between the connecting block (204) and the guide block (201); a cavity is provided inside the connecting block (204); and air inlet grooves (202) are evenly distributed and communicated with the cavity are provided on the surface of the connecting block (204); A connecting column (205) is fixedly connected to the top of the connecting block (204); a connecting channel (209) communicating with the cavity is provided inside the connecting column (205); a fan (206) is provided inside the connecting channel (209); a contraction section (208) is formed at the upper end of the connecting column (205); and blowing holes (207) evenly distributed and communicating with the connecting channel (209) are provided on the surface of the connecting column (205).

2. A cooling and molding device for a plastic film for a blow molding machine according to claim 1, characterized in that: One end of the mounting column (308) is fixedly connected to a fixing plate (319) fixedly connected to the inner wall of the connecting hole (306), the top of the sealing ring (309) is fixedly connected to a spring (310), and the top of the spring (310) is fixedly connected to the surface of the fixing plate (319).

3. A cooling and molding device for a plastic film for a blow molding machine according to claim 1, characterized in that: A connecting cavity (314) communicating with the connecting hole (306) is provided inside the mounting ring (103); the exhaust holes (316) are communicated with the connecting cavity (314); the number of exhaust holes (316) in each group is not less than four; the lower end of the baffle (317) extends to the inside of the exhaust holes (316); and the mounting strips (318) and the exhaust holes (316) are arranged in a staggered manner.

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