A punching method and device for producing polyolefin heat shrink packaging bags

Abstract

The present invention provides a punching method and device for producing polyolefin heat-shrinkable packaging bags, which relates to the field of packaging bag punching. The invention comprises the following steps: Step A, preparing a polyolefin heat-shrinkable packaging bag to be punched and a punching device; Step B, installing a punching mold on the punching device, and adjusting the parameters of the punching device, such as the punching depth, the punching diameter, etc.; by setting a smoothing mechanism such as a support leg and a smoothing roller, it can be achieved that when the packaging bag needs to be punched, the operator can control the installation beam to drive the entire punching mechanism downward. When the punching mechanism descends, the smoothing roller will first contact the packaging bag, and will slowly smooth the packaging bag to both sides under the drive of the rolling smoothing roller, so as to avoid wrinkles in the polyolefin heat-shrinkable packaging bag during punching, resulting in insufficient surface tension and offset during punching, thereby ensuring the use effect of the packaging bag.

Description

Technical Field

[0001] The present invention relates to the field of packaging bag punching, and in particular to a punching method and device for producing polyolefin heat shrinkable packaging bags. Background Art

[0002] With the continuous development of my country's economic development level, packaging products have been widely used in daily chemicals, medicines and agricultural and sideline products. As one of the packaging materials, biaxially oriented polyolefin shrink film (POF) has the advantages of light weight, good transparency, non-toxicity, green environmental protection and easy use compared with traditional packaging materials such as wood, paper, metal, glass and polyvinyl chloride heat shrink film (PVC heat shrink film). It is now often made into packaging bags and widely used in the packaging and transportation of products in the fields of food, medicine, daily necessities, electronic appliances, and pharmaceutical industries.

[0003] In order to allow air circulation inside the packaging bag and facilitate ventilation and exhaust, holes are usually punched on the packaging bag. However, the existing punching machine lacks a smoothing and positioning device when in use, which causes wrinkles to appear on the packaging bag when the punching machine punches holes, resulting in insufficient surface tension and ultimately causing the punching position to shift, affecting the use of the packaging bag. At the same time, when the existing punching device is used at high intensity, the punching needle will become hot, and the existing punching device lacks a cooling device, which causes the high-temperature punching needle to have burrs when punching holes in the packaging bag, and the punching needle will stick to the hole, affecting use. Existing polyolefin heat shrink packaging bags are usually used to package medicines, foods and other items with high requirements for the packaging environment. When the existing punching machine is used for a long time, some plastic fragments and impurities will usually remain on the surface of the punching needle, and the existing punching device usually does not have a punching needle cleaning device, which causes plastic fragments and impurities to enter the packaging bag when the uncleaned empty punching needle punches holes in the packaging bag, affecting the packaging safety of the packaging bag.

[0004] How to invent a punching method and device for the production of polyolefin heat shrinkable packaging bags to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In order to make up for the above deficiencies, the present invention provides a punching method and device for the production of polyolefin heat shrinkable packaging bags, aiming to improve the problem that the existing punching device lacks a smoothing positioning device and a cooling device.

[0006] The present invention is achieved in that:

[0007] The present invention provides a punching method for producing polyolefin heat shrinkable packaging bags, the method comprising the following steps:

[0008] Step A: prepare a polyolefin heat shrink packaging bag to be punched and a punching device;

[0009] Step B: Install the punching die on the punching equipment and adjust the parameters of the punching equipment, such as punching depth, punching diameter, etc.

[0010] Step C: Check whether the punching needles and punching pins in the punching equipment are matched. If they are not matched, it is easy to damage the punching equipment;

[0011] Step D: After the punching equipment is inspected, the polyolefin heat shrink packaging bag that needs to be punched is placed on the transportation equipment for transportation punching.

[0012] A punching device for producing polyolefin heat shrink packaging bags, the device comprising a punching device;

[0013] Preferably, the punching equipment includes a transport platform, and the left and right sides of the transport platform are fixedly connected with mounting bosses, and the mounting bosses are fixedly connected with a hydraulic piston rod, and the upper end of the hydraulic piston rod is installed with a mounting beam, and the left and right sides of the mounting beam are fixedly connected with mounting parts, and the inner side wall of the mounting part is installed with a smoothing shaft, and a support leg is fixedly connected to the smoothing shaft, and a reset tension spring is fixedly connected to the outer side wall of the support leg, and the side of the reset tension spring away from the support leg is fixedly connected to the outer side wall of the mounting part, and the lower end of the support leg is rotatably connected to a smoothing roller, and the smoothing roller is made of silicone material.

[0014] Preferably, a telescopic punching motor is fixedly connected to the outer wall of the lower end of the mounting beam, the punching needle is arranged at the output end of the telescopic punching motor, and a mounting frame is fixedly connected to the outer wall of the lower end of the telescopic punching motor, and the punching needle slides through the inside of the mounting frame.

[0015] By adopting the above technical solution and setting the supporting legs, the packaging bag can be smoothed.

[0016] Preferably, the left and right sides of the telescopic punching motor are fixedly connected to a water tank, the upper outer wall of the water tank is fixedly connected to a water inlet, the water inlet penetrates into the interior of the water tank, the bottom of the water tank is connected to an infusion channel, the inner wall of the infusion channel is slidably connected to a trigger baffle, both sides of the trigger baffle slide through to the outside of the infusion channel, the right end of the trigger baffle is fixedly connected to a tension spring, and the end of the tension spring away from the trigger baffle is fixedly connected to the outer wall of the telescopic punching motor.

[0017] Preferably, a water delivery hole is opened on the left side of the trigger baffle, and the water delivery hole is located outside the infusion channel. The left end of the trigger baffle is fixedly connected to a trigger magnet.

[0018] Preferably, a mounting plate is fixedly connected to the outer side wall of the support leg, and a contact magnet is fixedly connected to the end of the mounting plate, and the magnetic pole of the contact magnet is opposite to the magnetic pole of the trigger magnet.

[0019] Preferably, a contact cleaning piece is provided inside the mounting frame, and the contact cleaning piece is in sliding contact with the outer wall of the punching needle. An infusion tube is provided in communication with the inner wall of the contact cleaning piece, and the upper end of the infusion tube passes through the interior of the infusion channel.

[0020] Preferably, a water delivery groove is provided on the inner side wall of the contact cleaning member, the water delivery groove is arranged at an angle, and the water delivery groove is connected to the lower end of the infusion tube.

[0021] By adopting the above technical solution and setting up the infusion tube, the water in the water storage tank can be transported, so that the punching needle can be cooled.

[0022] The beneficial effects of the present invention are:

[0023] 1. Through the setting of supporting legs and smoothing rollers and other mechanisms, when it is necessary to punch holes in the packaging bag, the operator can control the installation beam to drive the entire punching mechanism downward. When the punching mechanism moves downward, the smoothing roller will first contact the packaging bag, and will slowly smooth the packaging bag to both sides under the drive of the rolling smoothing roller, avoiding wrinkles in the polyolefin heat shrink packaging bag during punching, resulting in insufficient surface tension and deviation during punching, thereby ensuring the use effect of the packaging bag.

[0024] 2. Through the setting of mechanisms such as the water storage tank and the trigger baffle, it can be achieved that when the smoothing roller smoothes the packaging bag on both sides to prepare for punching, the water storage tank will intermittently drip water into the contact cleaning part through the infusion channel, and then wipe it onto the punching needle through the contact cleaning part, so that the high-intensity punching needle can be cooled before punching, avoiding the phenomenon of burrs and adhesion in the hole caused by the high temperature of the installation part.

[0025] 3. While the water tank cools down the punching needle through the contact cleaning part, the contact cleaning part will also contact and scrape the surface of the punching needle during the up and down movement of the punching needle to clean the surface of the punching needle to avoid more plastic impurities remaining on the surface of the punching needle. When punching, the plastic impurities enter the packaging bag and affect the safety of the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic structural diagram of a punching method and device for producing polyolefin heat shrinkable packaging bags provided by an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the installation beam structure in a punching method and device for producing polyolefin heat shrinkable packaging bags provided by an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the partial structure of the installation beam in a punching method and device for producing polyolefin heat shrink packaging bags provided by an embodiment of the present invention;

[0030] Figure 4 yes Figure 3 A magnified view of middle A;

[0031] Figure 5 This is a schematic diagram of the internal structure of a contact cleaning component in a punching method and device for producing polyolefin heat shrinkable packaging bags provided by an embodiment of the present invention;

[0032] Figure 6 It is a schematic plan view of a punching method and device for producing polyolefin heat shrinkable packaging bags provided by an embodiment of the present invention.

[0033] In the figure: 1. Transport platform; 2. Mounting beam; 101. Mounting boss; 102. Hydraulic piston rod; 201. Mounting part; 202. Smoothing shaft; 203. Support leg; 204. Smoothing roller; 205. Reset tension spring; 206. Telescopic punching motor; 207. Punching needle; 208. Contact cleaning part; 209. Mounting frame; 210. Water tank; 211. Water inlet; 212. Infusion channel; 213. Water trough; 214. Tension spring; 215. Trigger baffle; 216. Water hole; 217. Mounting plate; 218. Trigger magnet; 219. Contact magnet; 220. Infusion tube. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] Example

[0036] Reference Figure 1-3 , a punching method for producing polyolefin heat shrinkable packaging bags, the method comprising the following steps;

[0037] Step A: prepare a polyolefin heat shrink packaging bag to be punched and a punching device;

[0038] Step B: Install the punching needle on the punching device and adjust the parameters of the punching device, such as punching depth, punching diameter, etc.

[0039] Step C: Check whether the punching needles and punching pins in the punching equipment are matched. If they are not matched, it is easy to damage the punching equipment;

[0040] Step D: After the punching equipment is inspected, the polyolefin heat shrink packaging bag that needs to be punched is placed on the transportation equipment for transportation punching.

[0041] Reference Figure 3-4 A punching device for producing polyolefin heat shrink packaging bags, the device includes a punching device, the punching device includes a transport platform 1, the left and right sides of the transport platform 1 are fixedly connected with mounting bosses 101, the mounting bosses 101 are fixedly connected with a hydraulic piston rod 102, the upper end of the hydraulic piston rod 102 is installed with a mounting crossbeam 2, the lower end outer wall of the mounting crossbeam 2 is fixedly connected with a telescopic punching motor 206, a punching needle 207 is arranged at the output end of the telescopic punching motor 206, the left and right sides of the telescopic punching motor 206 are fixedly connected with a water tank 210, the upper end outer wall of the water tank 210 is fixedly connected with a water inlet 211, and the water inlet 211 penetrates into the interior of the water tank 210;

[0042] Furthermore, an infusion channel 212 is provided at the bottom of the water storage tank 210. A trigger baffle 215 is slidably connected to the inner side wall of the infusion channel 212. A water delivery hole 216 is opened on the left side of the trigger baffle 215. The water delivery hole 216 is located outside the infusion channel 212. A trigger magnet 218 is fixedly connected to the left end of the trigger baffle 215. Both sides of the trigger baffle 215 slide through the outside of the infusion channel 212. A tension spring 214 is fixedly connected to the right end of the trigger baffle 215. The end of the tension spring 214 away from the trigger baffle 215 is fixedly connected to the outer side wall of the telescopic punching motor 206. A mounting frame 209 is fixedly connected to the outer side wall of the lower end of the telescopic punching motor 206.

[0043] It should be noted that when the support legs 203 are opened to both sides, the rotating smoothing rollers 204 will smooth the packaging bag;

[0044] Reference Figure 4-6 The punching needle 207 is slidably connected to the interior of the installation frame 209. A contact cleaning member 208 is provided inside the installation frame 209. The contact cleaning member 208 is in sliding contact with the outer wall of the punching needle 207. The inner wall of the contact cleaning member 208 is connected to an infusion tube 220. The upper end of the infusion tube 220 passes through the interior of the infusion channel 212. The inner wall of the contact cleaning member 208 is provided with a water delivery groove 213, which is inclined.

[0045] Furthermore, the water delivery trough 213 is connected to the lower end of the infusion tube 220, and the left and right sides of the mounting beam 2 are fixedly connected with mounting parts 201, and the inner wall of the mounting part 201 is installed with a smoothing shaft 202, and the smoothing shaft 202 is fixedly connected to the support leg 203, and the outer wall of the support leg 203 is fixedly connected to the mounting plate 217. The end of the mounting plate 217 is fixedly connected to the contact magnet 219, and the magnetic pole of the contact magnet 219 is opposite to the magnetic pole of the trigger magnet 218. A reset tension spring 205 is fixedly connected to the outer wall of the support leg 203, and the side of the reset tension spring 205 away from the support leg 203 is fixedly connected to the outer wall of the mounting part 201. The lower end of the support leg 203 is rotatably connected to the smoothing roller 204, and the smoothing roller 204 is made of silicone material;

[0046] It should be noted that after the punching needle 207 has completed the up and down reciprocating motion to punch holes in a batch of heat shrink packaging bags, the operator can control the hydraulic piston rod 102 to move the mounting beam 2 upward. At this time, the downward pressure of the mounting beam 2 ends, and under the pull of the tight return tension spring 205, the originally opened support leg 203 will return to its original position. When the support leg 203 returns to its original position, the distance between the contact magnet 219 and the trigger magnet 218 will become closer again. At this time, the attractive magnetic force will pull the trigger baffle 215 to the left. Correspondingly, the water delivery hole 216 originally located in the infusion channel 212 will be pulled out of the infusion channel 212. At this time, the infusion channel 212 stops dripping water downward, saving water resources to the greatest extent. When punching the next batch of heat shrink packaging bags, the above steps are repeated, and the infusion channel 212 will drip water downward again to cool the punching needle 207 again.

[0047] The working principle of the punching method and device for producing polyolefin heat shrinkable packaging bags:

[0048] When punching, the operator can put the heat shrink packaging bag that needs to be punched on the transport platform 1 and transport it by the transport platform 1. When the transport platform 1 transports the packaging tape to the bottom of the installation beam 2, the sensor in the transport platform 1 will stop the transport platform 1 (this is the existing technology and will not be explained in detail). At this time, the operator can control the hydraulic piston rod 102 to retract and drive the entire installation beam 2 to move downward. When the installation beam 2 moves downward, the smoothing rollers 204 on both sides of the installation beam 2 will first contact the heat shrink packaging bag stopped under the installation beam 2, and as the installation beam 2 continues to descend, driven by the rolling smoothing rollers 204, the supporting legs 203 on both sides will slowly open to both sides of the installation beam 2, and the heat shrink packaging bag will be smoothed by the smoothing rollers 204 to ensure that the heat shrink packaging bag will not be wrinkled when the punching needle 207 punches holes, thereby affecting the punching position;

[0049] When the support legs 203 are opened to both sides and the heat shrink packaging bag is smoothed, the mounting plates 217 installed on the outer walls thereof will be driven to move to both sides of the mounting beam 2. Accordingly, the contact magnets 219 installed at the ends of the mounting plates 217 will move away from the trigger magnets 218. When the contact magnets 219 move away from the trigger magnets 218, the magnetic force between the two disappears. At this time, under the action of the tension of the tension spring 214, the trigger baffle 215 will move to the right. At this time, the water delivery hole 216 originally located outside the infusion channel 212 will enter the infusion channel 212. When the water delivery hole 216 enters the infusion channel 212, the originally The cooling water in the water storage tank 210, which is blocked by the unopened portion of the triggered baffle 215, will flow through the water delivery hole 216 to the bottom of the infusion channel 212, and then be transported through the infusion tube 220 and the water delivery trough 213 to the contact end between the contact cleaning member 208 and the punching needle 207. At this time, the operator can turn on the telescopic punching motor 206 to make the punching needle 207 reciprocate up and down to punch holes in the heat shrink packaging bag. When the punching needle 207 reciprocates up and down, the contact cleaning member 208 will flow water outward to cool the surface of the punching needle 207, thereby avoiding the phenomenon of burrs and adhesion in the hole caused by the over-high temperature of the mounting member 201.

[0050] While the water tank 210 cools down the punching needle 207 through the contact cleaning part 208, the contact cleaning part 208 will also contact and scrape the surface of the punching needle 207 during the up and down movement of the punching needle 207 to clean the surface of the punching needle 207, thereby avoiding a large amount of plastic impurities remaining on the surface of the punching needle 207. When punching, the plastic impurities enter the heat shrink packaging bag, affecting the safe use of the heat shrink packaging bag.

[0051] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A punching device for producing polyolefin heat shrinkable packaging bags, characterized in that: The transport platform (1) comprises a transport platform (1), wherein both left and right sides of the transport platform (1) are fixedly connected with mounting bosses (101), a hydraulic piston rod (102) is fixedly connected to the mounting bosses (101), a mounting beam (2) is mounted on the upper end of the hydraulic piston rod (102), mounting members (201) are fixedly connected to the left and right sides of the mounting beam (2), a smoothing shaft (202) is mounted on the inner side wall of the mounting member (201), a supporting leg (203) is fixedly connected to the smoothing shaft (202), and a telescopic punching motor (206) is fixedly connected to the outer side wall of the lower end of the mounting beam (2); The left and right sides of the telescopic punching motor (206) are fixedly connected to a water tank (210), the outer wall of the upper end of the water tank (210) is fixedly connected to a water inlet (211), the water inlet (211) penetrates into the interior of the water tank (210), and the bottom of the water tank (210) is connected to an infusion channel (212), the inner wall of the infusion channel (212) is slidably connected to a trigger baffle (215), both sides of the trigger baffle (215) slide through the outside of the infusion channel (212), the right end of the trigger baffle (215) is fixedly connected to a tension spring (214), and the end of the tension spring (214) away from the trigger baffle (215) is fixedly connected to the outer wall of the telescopic punching motor (206); A water delivery hole (216) is provided on the left side of the trigger baffle (215), and the water delivery hole (216) is located outside the infusion channel (212). A trigger magnet (218) is fixedly connected to the left end of the trigger baffle (215). A mounting plate (217) is fixedly connected to the outer wall of the support leg (203). A contact magnet (219) is fixedly connected to the end of the mounting plate (217). The magnetic pole of the contact magnet (219) is opposite to the magnetic pole of the trigger magnet (218). A return tension spring (205) is fixedly connected to the outer wall of the support leg (203), and the side of the return tension spring (205) away from the support leg (203) is fixedly connected to the outer wall of the mounting member (201). The lower end of the support leg (203) is rotatably connected to a smoothing roller (204), and the smoothing roller (204) is made of silicone material. A mounting frame (209) is fixedly connected to the outer wall of the lower end of the telescopic punching motor (206), and a contact cleaning member (208) is provided inside the mounting frame (209). The contact cleaning member (208) is in sliding contact with the outer wall of the punching needle (207), and an infusion tube (220) is provided on the inner wall of the contact cleaning member (208), and the upper end of the infusion tube (220) passes through the interior of the infusion channel (212).

2. A punching device for producing polyolefin heat shrinkable packaging bags according to claim 1, characterized in that: The punching needle (207) is arranged at the output end of the telescopic punching motor (206), and the punching needle (207) is slidably connected to the interior of the installation frame (209).

3. The punching device for producing polyolefin heat shrinkable packaging bags according to claim 1, characterized in that: A water delivery groove (213) is provided on the inner side wall of the contact cleaning member (208). The water delivery groove (213) is arranged at an angle and is connected to the lower end of the liquid delivery tube (220).

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