An automated punching device for the production of packaging films

Abstract

The present invention relates to the field of film punching, specifically to an automated punching device for producing packaging films, including a punching device, the punching device including a base and a gantry mounted on the top of the base, a telescopic cylinder mounted on the top of the gantry, an upper template fixedly connected to the bottom of the telescopic section of the telescopic cylinder, and a stretching device mounted on the bottom of the upper template. The present invention utilizes a downwardly moving lateral stretching mechanism to stretch the left and right ends of the packaging film, and after the blocking rod is blocked by the first limiting mechanism, the connecting block that continues to move downward will drive the lower pressure rod to push the inclined slot frame downward, so that the lower pressure block can continue to push the L-shaped slider to move away from the lower concave die after moving downward to clamp the packaging film, thereby stretching the front and rear ends of the packaging film, and improving the flatness of the unfolded packaging film by stretching the packaging film in the left, right, front and back directions, thereby improving the overall punching quality and the molding consistency of a plurality of holes.

Description

Technical Field

[0001] The invention relates to the technical field of film punching, in particular to an automatic punching device for producing packaging films. Background Art

[0002] Packaging film mainly refers to the film used for packaging items. It has puncture resistance and super strength and high performance, and can protect the surface of goods. Some packaging films need to be perforated when used. The perforation allows the gas inside the package to escape, reducing the pressure of the gas inside the package and helping to keep the package shape stable. For food or fresh products, perforation allows the oxygen and carbon dioxide inside the package to exchange, extending the shelf life of the product; it prevents the accumulation of water vapor, avoiding the accumulation of water vapor inside the package and reducing the impact of moisture on the product.

[0003] The existing packaging film punching method is to use a punching head to pierce the surface of the film to form holes, and a sharp needle is used for tiny holes. The existing method of using a punching head to punch packaging film also has the following shortcomings: 1. When multiple punching heads pierce the film to punch holes at the same time, the punching heads will give the film downward pressure, and the film will deform under the action of pressure, affecting the punching quality of the film and the consistency of several holes; 2. After the punching is completed, in the process of pulling out the punching head, the film will be moved up by the punching head, which will cause the edge of the formed hole to be stretched and deformed, further affecting the quality of the punching; 3. Punching waste will be generated after the punching is completed. The existing waste treatment method is to adsorb the waste after the punching is completed. The adsorption range is wide, and the film is easily sucked and stretched and deformed during adsorption, which further affects the quality of the punching. In addition, it will take a certain amount of time to adsorb the waste after the punching is completed, affecting the overall punching efficiency. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an automated punching equipment for producing packaging films, including a punching device, the punching device including a base and a gantry installed on the top of the base, a telescopic cylinder is installed on the top of the gantry, an upper template is fixedly connected to the bottom of the telescopic section of the telescopic cylinder, a plurality of lower concave dies distributed in a matrix are arranged on the top of the base, a plurality of upper convex dies that match the lower concave dies one by one are fixedly connected to the bottom of the upper template, a stretching device is installed on the bottom of the upper template, a film pressing device is installed on the lower surface of the top of the gantry, and a waste collection device for collecting punching waste is also installed on the base.

[0005] The stretching device includes a transverse stretching mechanism that is symmetrically distributed about the base and performs left-right stretching, and a longitudinal stretching mechanism that is symmetrically distributed about the base and performs front-back stretching. The transverse stretching mechanism and the longitudinal stretching mechanism work together to pull and flatten the packaging film. A first limiting mechanism and a second limiting mechanism are also installed on the top of the base to limit the transverse stretching mechanism and the longitudinal stretching mechanism respectively.

[0006] The film pressing device includes a plurality of guide and limit mechanisms which are distributed in a matrix on the top of the gantry and are adjusted up and down as the upper template moves up and down. The bottom of the guide and limit mechanism passes through the bottom of the upper template and is connected to a mesh plate, which is slid up and down and is mounted on the outside of the upper punch.

[0007] In a possible implementation, guide rollers are symmetrically rotatably mounted on the left and right sides of the base, the tops of the guide rollers are flush with the top of the base, and a driving motor is mounted on the side of the base to drive the guide rollers to rotate intermittently.

[0008] In one possible implementation, the lateral stretching mechanism includes a first elastic telescopic rod fixedly connected to the bottom of the upper template and symmetrically distributed front and rear about the base, the bottom of the first elastic telescopic rod is fixedly connected with a connecting block and a second elastic telescopic rod in sequence, a roller frame is fixedly connected between the bottoms of the front and rear second elastic telescopic rods, a stretching roller is rotatably installed at the bottom of the roller frame, the stretching roller is located below the side of the guide roller away from the middle of the base, and a baffle rod is fixedly connected to both the front and rear ends of the roller frame.

[0009] In one possible implementation, the longitudinal stretching mechanism includes an L-shaped slider installed on the top of the base for sliding back and forth, the top of the horizontal section of the L-shaped slider is flush with the top of the base, and a downward pressure block is installed on the side of the vertical section of the L-shaped slider close to the base for sliding up and down, and the top of the downward pressure block is symmetrically connected to an inclined groove frame, and the inclined groove frame is inclined upward at one end close to the corresponding vertical section of the L-shaped slider, and a downward pressure rod is slidably installed inside the inclined groove frames on the same side of the front and rear, and the left and right ends of the downward pressure rod are respectively fixedly connected to the corresponding connecting blocks.

[0010] In one possible implementation, the second limiting mechanism includes a baffle fixedly connected to the top of the base and located on the side of the L-shaped slider away from the center of the base, the middle portion of the baffle is threaded and connected with a limiting bolt, and the baffle is fixedly connected to the side of the vertical section of the L-shaped slider with a return spring.

[0011] In one possible implementation, the guide limiting mechanism includes a guide sleeve fixedly connected to the lower end surface of the top of the gantry, a guide assembly is installed on the bottom of the guide sleeve for sliding up and down, and a locking assembly for limiting the upward and downward sliding of the guide assembly and an unlocking assembly for releasing the restriction are installed inside the guide assembly.

[0012] In one possible implementation, the guide assembly includes a guide rod that is slidably installed at the bottom of the guide sleeve and is hollow inside. A slow-down block is rotatably installed on the top of the guide rod. An elastic protrusion is provided on the outer ring surface of the slow-down block. The inner wall of the guide sleeve is provided with a recessed groove that cooperates with the elastic protrusion. The bottom end of the guide rod extends to the lower end of the guide sleeve and is fixedly connected with an upper retaining ring and a lower retaining ring located outside the guide sleeve in sequence from top to bottom.

[0013] In one possible implementation, the locking assembly includes an elastic rod which is symmetrically distributed in the inner cavity of the guide rod and whose bottom is slidably connected to the bottom of the inner cavity of the guide rod. A hook is fixedly connected to the top of the elastic rod. A through hole is provided on the side wall of the guide rod for the hook to extend to the outside thereof. Limiting grooves are provided on the inner walls on the left and right sides of the guide sleeve. One end of the hook close to the guide sleeve passes through the through hole and engages with the limiting groove. A reset spring 2 is also fixedly connected between the left and right elastic rods.

[0014] In one possible implementation, the unlocking assembly includes a button that is slidably installed on the top of the lower baffle ring and is symmetrically distributed about the lower baffle ring. The bottom of the button passes through the interior of the lower baffle ring and is fixedly connected to a pushing block. The elastic rod is fixedly connected to a wedge block on one side close to the pushing block. The pushing block cooperates with the bottom of the pushing block, and a reset spring three is fixedly connected between the bottom of the pushing block and the bottom of the inner cavity of the lower baffle ring.

[0015] In one possible implementation, the waste collection device includes a filter box installed on the front side of the punching device, the bottom of the lower die is connected to the inlet end of the filter box through a suction pipe fixedly connected and connected thereto, a negative pressure pump is fixedly installed at the outlet end of the filter box, and the suction pipe is located inside the base.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention drives the upper template and the lateral stretching mechanism to move downward through a single driving source, and utilizes the downward-moving lateral stretching mechanism to stretch the left and right ends of the packaging film. After the blocking rod is blocked by the first limiting mechanism, the connecting block that continues to move downward will drive the lower pressure rod to push the inclined groove frame downward, so that the lower pressure block can continue to push the L-shaped slider to move away from the lower concave die after moving downward to clamp the packaging film, thereby stretching the front and rear ends of the packaging film. Finally, the upper template drives the upper punch to continue to move downward to punch holes. By stretching the packaging film in the left, right, front and back directions, the flatness of the unfolded packaging film is improved, thereby improving the overall punching quality and the molding consistency of a plurality of holes.

[0017] 2. The present invention realizes the linkage cooperation between the upper template and the film pressing device. When the upper template drives the upper punch to move down to the lower die for punching, the upper template just contacts the button and squeezes the button to move downward to unlock it. Then the upper template pushes the lower retaining ring to drive the mesh plate to move downward and press on the packaging film. Subsequently, the upper punch moves up first to separate from the packaging film, and then the mesh plate separates from the guarantee film. This avoids the packaging film moving up with the upper punch, causing the forming hole to be stretched and deformed, thereby further improving the quality and consistency of the punching.

[0018] 3. The present invention provides a waste collection device to suck the waste into the filter box before the upper punch and the lower die are separated. Punching and waste absorption are carried out simultaneously, which improves the efficiency of punching. In addition, the waste is adsorbed before the upper punch and the lower die are separated, and the adsorption range can be limited to the lower die, avoiding deformation of the forming hole caused by a wide adsorption range, thereby further improving the quality of punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a schematic cross-sectional structural diagram of the front side of the present invention.

[0021] Figure 3 It is a cross-sectional structural schematic diagram of the right side of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the transverse stretching mechanism of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the longitudinal stretching mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the film pressing device of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the guide and limiting mechanism of the present invention.

[0026] Figure 8 The present invention Figure 7 Enlarged view of point A in the middle.

[0027] In the figure: 1, punching device; 11, bottom platform; 111, guide roller; 112, driving motor; 113, lower concave die; 12, gantry; 13, telescopic cylinder; 14, upper template; 141, upper punch; 2, stretching device; 21, horizontal stretching mechanism; 211, first elastic telescopic rod; 212, connecting block; 213, second elastic telescopic rod; 214, roller frame; 215, stretching roller; 216, stop rod; 22, longitudinal stretching mechanism; 221, L-shaped slider; 222, lower pressure block; 223, inclined slot frame; 224, lower pressure rod; 23, first limiting mechanism; 24, second limiting mechanism; 241, baffle; 242, limit 1. Position bolt; 243. Reset spring one; 3. Film pressing device; 31. Guide limit mechanism; 311. Guide sleeve; 312. Guide assembly; 3121. Guide rod; 3122. Slow-down block; 3123. Upper retaining ring; 3124. Lower retaining ring; 313. Locking assembly; 3131. Elastic rod; 3132. Hook; 3133. Limiting groove; 3134. Reset spring two; 314. Unlocking assembly; 3141. Button; 3142. Push block; 3143. Wedge block; 3144. Reset spring three; 32. Screen plate; 4. Waste collection device; 41. Suction pipe; 42. Filter box; 43. Negative pressure pump; 5. Packaging film. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] See also Figure 1 , Figure 2 and Figure 3 , an automated punching device for producing packaging films, comprising a punching device 1, the punching device 1 comprising a base 11 and a gantry 12 installed on the top of the base 11, a telescopic cylinder 13 installed on the top of the gantry 12, an upper template 14 fixedly connected to the bottom of the telescopic section of the telescopic cylinder 13, a plurality of lower concave dies 113 distributed in a matrix are arranged on the top of the base 11, a plurality of upper convex dies 141 matched one by one with the lower concave dies 113 are fixedly connected to the bottom of the upper template 14, the upper convex dies 141 are hollow structures and the top of the cavity passes through the top of the upper template 14, a stretching device 2 is installed on the bottom of the upper template 14, a film pressing device 3 is installed on the lower surface of the top of the gantry 12, and a waste collecting device 4 for collecting punching waste is also installed on the base 11.

[0030] See also Figure 1 , Figure 2 and Figure 3 The stretching device 2 includes a transverse stretching mechanism 21 which is symmetrically distributed about the base 11 and performs left-right stretching, and a longitudinal stretching mechanism 22 which is symmetrically distributed about the base 11 and performs front-back stretching. The transverse stretching mechanism 21 and the longitudinal stretching mechanism 22 cooperate with each other to pull and flatten the packaging film 5. A first limiting mechanism 23 and a second limiting mechanism 24 are also installed on the top of the base 11 to limit the transverse stretching mechanism 21 and the longitudinal stretching mechanism 22 respectively.

[0031] See also Figure 1 , Figure 2 and Figure 6 The laminating device 3 includes a plurality of guide and limit mechanisms 31 which are distributed in a matrix on the top of the gantry 12 and are adjusted to rise and fall as the upper template 14 moves up and down. The bottom of the guide and limit mechanism 31 passes through the bottom of the upper template 14 and is connected to a mesh plate 32, which slides up and down and is mounted on the outside of the upper punch 141.

[0032] See also Figure 1 and Figure 2 Guide rollers 111 are symmetrically rotatably installed on the left and right sides of the base 11, the top of the guide roller 111 is flush with the top of the base 11, and a driving motor 112 for driving the guide roller 111 to rotate intermittently is installed on the left side of the base 11.

[0033] The packaging film 5 is intermittently conveyed and reeled through the existing conveying equipment and reeling equipment. At the same time, the guide roller 111 is driven to rotate intermittently by the intermittent start and stop of the driving motor 112, so that the guide roller 111 intermittently cooperates to convey the packaging film 5. The distance the packaging film 5 is conveyed each time is equal to the length of a punching range. During the intermittent stop of conveying, the telescopic cylinder 13 pushes the upper template 14 to move downward for punching.

[0034] See also Figure 1 , Figure 2 and Figure 4 The lateral stretching mechanism 21 includes a first elastic telescopic rod 211 fixedly connected to the bottom of the upper template 14 and symmetrically distributed front and rear about the base 11. The bottom of the first elastic telescopic rod 211 is fixedly connected with a connecting block 212 and a second elastic telescopic rod 213 in sequence. A roller frame 214 is fixedly connected between the bottoms of the front and rear second elastic telescopic rods 213. A stretching roller 215 is rotatably installed at the bottom of the roller frame 214. The stretching roller 215 is located below the side of the guide roller 111 away from the middle of the base 11. The front and rear ends of the roller frame 214 are fixedly connected with a blocking rod 216.

[0035] The lateral stretching mechanism 21 is driven downward by the upper template 14, so that the stretching roller 215 presses down the left and right ends of the packaging film 5, thereby stretching the packaging film 5 located above the lower concave mold 113 in the left and right directions, improving the flatness of the packaging film 5, preventing the packaging film 5 from deforming during the punching process, and improving the quality of the punching; the elastic coefficient of the second elastic telescopic rod 213 is smaller than the elastic coefficient of the first elastic telescopic rod 211. When the blocking rod 216 is blocked, the second elastic telescopic rod 213 will be squeezed and deformed before the first elastic telescopic rod 211, so that the first elastic telescopic rod 211 can continue to drive the connecting block 212 to move downward.

[0036] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The longitudinal stretching mechanism 22 includes an L-shaped slider 221 slidably installed on the top of the base 11. A ball bearing is also rotatably installed on the bottom of the L-shaped slider 221 to reduce the resistance of the L-shaped slider 221 during sliding. The top of the horizontal section of the L-shaped slider 221 is flush with the top of the base 11. The vertical section of the L-shaped slider 221 is close to the side of the base 11 and is installed with a pressing block 222 for sliding up and down. The top of the pressing block 222 is symmetrically connected with an inclined groove frame 223. The inclined groove frame 223 is inclined upward at one end of the vertical section of the corresponding L-shaped slider 221. A pressing rod 224 is slidably installed inside the inclined groove frame 223 on the same side of the front and rear. The left and right ends of the pressing rod 224 are respectively fixedly connected to the corresponding connecting block 212.

[0037] The front and rear edges of the packaging film 5 pass through the corresponding L-shaped slider 221 and the lower pressing block 222 respectively. In the process of the first elastic telescopic rod 211 driving the connecting block 212 to move downward, the lower pressing rod 224 will move downward together with the connecting block 212, and the inclined groove frame 223 and the lower pressing block 222 will be driven downward by the lower pressing rod 224. After the blocking rod 216 is blocked, the upper template 14 continues to move downward, and the lower pressing block 222 and the L-shaped slider 221 clamp the edge of the packaging film 5, and then the upper template 14 continues to move downward. At the same time, the lower pressing rod 224 will push the L-shaped slider 221 and the lower pressing block 222 to move away from the lower concave mold 113 under the guidance of the inclined groove frame 223, thereby stretching the front and rear ends of the packaging film 5 to further improve the flatness of the unfolded packaging film 5.

[0038] See also Figure 1 The first limiting mechanism 23 is composed of a telescopic rod fixedly mounted on the top of the base 11 and a horizontal plate fixedly connected to the top of the telescopic rod. The telescopic rod is provided with a fixing bolt for locking the telescopic rod.

[0039] When the stretching roller 215 moves downward, the baffle rod 216 is blocked by the cross plate, which can limit the degree of descent of the stretching roller 215, and further limit the degree of stretching of the left and right ends of the packaging film 5 by the stretching roller 215, so as to avoid the left and right ends of the packaging film 5 being over-stretched and deformed and affecting the subsequent punching operation; the degree of restriction of the baffle rod 216 by the cross plate can be adjusted by adjusting the height of the telescopic rod to meet the stretching needs of different packaging films 5. After adjusting the height of the telescopic rod, tighten the fixing bolts to lock the telescopic section and the fixed section of the telescopic rod together.

[0040] See also Figure 1 , Figure 3 and Figure 5 The second limiting mechanism 24 includes a baffle 241 fixedly connected to the top of the base 11 and located on the side of the L-shaped slider 221 away from the center of the base 11. The middle part of the baffle 241 is threaded and penetrated by a limiting bolt 242. The baffle 241 is fixedly connected to the side of the vertical section of the L-shaped slider 221 with a return spring 243.

[0041] When the L-shaped slider 221 moves in the direction away from the lower die 113, the movement of the L-shaped slider 221 is limited by the blocking of the limit bolt 242 to prevent the L-shaped slider 221 from moving too much and causing the packaging film 5 to be over-stretched or deformed; by rotating the limit bolt 242, the distance between the end of the limit bolt 242 and the L-shaped slider 221 can be adjusted, and then the limiting distance of the packaging film 5 to the L-shaped slider 221 can be adjusted, so as to meet the stretching needs of different packaging films 5.

[0042] See also Figure 1 , Figure 6 and Figure 7 The guide limiting mechanism 31 includes a guide sleeve 311 fixedly connected to the lower end surface of the top of the gantry 12, and a guide component 312 is installed on the bottom of the guide sleeve 311 for sliding up and down. A locking component 313 for limiting the upward and downward sliding of the guide component 312 and an unlocking component 314 for releasing the restriction are installed inside the guide component 312.

[0043] See also Figure 1 , Figure 6 and Figure 7 The guide assembly 312 includes a guide rod 3121 which is slidably installed at the bottom of the guide sleeve 311 and is hollow inside. A slow-down block 3122 is rotatably installed on the top of the guide rod 3121. The outer ring surface of the slow-down block 3122 is provided with an elastic protrusion. The inner wall of the guide sleeve 311 is provided with a recessed groove that cooperates with the elastic protrusion. The lower end of the guide rod 3121 is fixedly connected with an upper retaining ring 3123 and a lower retaining ring 3124 located outside the guide sleeve 311 from top to bottom.

[0044] When the upper template 14 moves downward and pushes the guide rod 3121 to move downward, the slow-down block 3122 drives the elastic protrusion thereon to descend along the inner wall of the guide sleeve 311, and utilizes the friction between the elastic protrusion and the inner wall of the guide sleeve 311, as well as the descent deceleration implemented by the recessed groove on the elastic protrusion, to avoid the guide rod 3121 from falling off quickly, thereby improving the stability of the up and down movement of the mesh plate 32 and preventing the mesh plate 32 from pressing too hard on the packaging film 5, thereby causing damage or deformation of the packaging film 5.

[0045] See also Figure 6 and Figure 7 The locking assembly 313 includes an elastic rod 3131 which is symmetrically distributed in the inner cavity of the guide rod 3121 and the bottom is slidably connected to the bottom of the inner cavity of the guide rod 3121. A hook 3132 is fixedly connected to the top of the elastic rod 3131. A through hole is provided on the side wall of the guide rod 3121 for the hook 3132 to extend to the outside of the guide rod 3121. Limiting grooves 3133 are provided on the inner walls on the left and right sides of the guide sleeve 311. The hook 3132 penetrates the through hole and engages with the limiting groove 3133. An inclined surface is provided on the top of the hook 3132 near the limiting groove 3133. A reset spring 2 3134 is also fixedly connected between the left and right elastic rods 3131.

[0046] The elastic rod 3131 is given an outward elastic force by the reset spring 3134, so that the hook 3132 is hooked into the inside of the limiting groove 3133 to prevent the guide assembly 312 from falling; and when the upper template 14 moves upward to reset and pushes the guide assembly 312 upward through the upper retaining ring 3123, the limiting groove 3133 can push the inclined surface of the hook 3132, so that the hook 3132 automatically retracts into the inside of the guide rod 3121, avoiding obstruction to the upward movement of the guide assembly 312.

[0047] See also Figure 6 , Figure 7 and Figure 8 The unlocking assembly 314 includes a button 3141 which is slidably installed on the top of the lower blocking ring 3124 and is symmetrically distributed about the lower blocking ring 3124. The bottom of the button 3141 passes through the interior of the lower blocking ring 3124 and is fixedly connected to a pushing block 3142. The elastic rod 3131 is fixedly connected to a wedge block 3143 on one side close to the pushing block 3142. The pushing block 3142 cooperates with the wedge block 3143. A return spring 3144 is fixedly connected between the bottom of the pushing block 3142 and the bottom of the inner cavity of the lower blocking ring 3124.

[0048] When the upper template 14 moves down and contacts the button 3141, the upper template 14 pushes the button 3141 to move downward, and then the button 3141 drives the pushing block 3142 to move downward and squeeze the wedge block 3143, so that the elastic rod 3131 moves toward the inner center of the guide rod 3121, and moves the hook 3132 to the inside of the guide rod 3121, thereby releasing the lock on the guide assembly 312 and facilitating the movement of the guide assembly 312.

[0049] See also Figure 1 and Figure 3 The waste collecting device 4 includes a filter box 42 installed on the front side of the punching device 1. The bottom of the lower die 113 is connected to the inlet end of the filter box 42 through a suction pipe 41 fixedly connected and connected thereto. A negative pressure pump 43 is fixedly installed at the outlet end of the filter box 42. The suction pipe 41 is located inside the base 11.

[0050] After the upper punch 141 cooperates with the lower die 113 to complete the punching, before the upper punch 141 moves upward and away from the lower die 113, the negative pressure pump 43 is started to extract the air inside the filter box 42 to form a negative pressure, so that the waste is sucked into the filter box 42 through the suction pipe 41, and a local limited adsorption area is formed by the lower die 113 and the suction pipe 41 at its lower end, so as to avoid large-scale adsorption above or below the film, which causes the formed holes or other parts of the film to deform under the influence of suction.

[0051] When used specifically, step 1: drive the guide roller 111 to rotate intermittently through the driving motor 112, so that the guide roller 111 intermittently transports the packaging film 5 to the left. During the intervals of the movement of the packaging film 5, the telescopic cylinder 13 pushes the upper template 14 downward to perform the punching operation.

[0052] Step 2: During the downward movement of the upper template 14, the upper template 14 will push the lateral stretching mechanism 21 to move downward, so that the stretching roller 215 can squeeze the left and right ends of the packaging film 5 located on the top of the base 11 downward, thereby stretching the left and right sides of the packaging film 5 until the lateral stretching mechanism 21 is pressed on the top of the first limiting mechanism 23; then the upper template 14 continues to drive the first elastic telescopic rod 211 and the connecting block 212 to move downward, at this time the second elastic telescopic rod 213 will be compressed, and the lower pressure rod 224 will be driven to move downward through the connecting block 212, and then the inclined groove frame 223 drives the lower pressure rod 224 to move downward and clamp on the top of the front and rear sides of the packaging film 5, and then the lower pressure block 222 moves in the direction away from the lower concave mold 113 under the squeezing of the lower pressure rod 224, stretching the front and rear sides of the packaging film 5, thereby improving the flatness of the packaging film 5 on the top of the base 11.

[0053] Step three: After the packaging film 5 is stretched and flattened, the upper template 14 continues to drive the upper punch 141 to move downward and punch the packaging film 5. While the upper punch 141 is in contact with the packaging film 5, the upper template 14 presses down on the top of the button 3141 and squeezes it into the lower retaining ring 3124. The pushing block 3142 is pushed downward by the button 3141, so that the pushing block 3142 can squeeze the wedge block 3143, so that the elastic rod 3131 moves toward the inner center of the guide rod 3121, and the hook 3132 is moved to the inside of the guide rod 3121, and the guide assembly 312 is unlocked. Then the upper template 14 pushes the lower retaining ring 3124 to allow the mesh plate 32 to be pressed on the packaging film 5, so as to avoid deformation of the forming hole when the upper punch 141 moves upward.

[0054] Step 4: After the upper punch 141 enters the lower die 113, the waste generated by punching will fall into the lower die 113. Before the upper punch 141 leaves the lower die 113, the negative pressure pump 43 is started to suck the waste into the filter box 42 through the suction pipe 41, and the waste is filtered and stored by the filter box 42.

[0055] Step 5: After the punching is completed, the upper template 14 is driven to move upward by the telescopic cylinder 13, so that the upper punch 141 is separated from the lower die 113 upward, and the mesh plate 32 pressed on the packaging film 5 can prevent the packaging film 5 from being deformed during the upward movement of the upper punch 141; the upwardly moved upper template 14 will drive the longitudinal stretching mechanism 22 to move upward, and pull the lower pressure block 222 upward to contact the clamping of the packaging film 5 through the lower pressure rod 224, and at the same time, the reset spring 243 pushes the L-shaped slider 221 to move and reset in the direction close to the lower die 113, and then the roller frame 214 drives the stretching roller 215 to move upward and reset; when the upper template 14 moves upward to contact with the upper retaining ring 3123, the upper template 14 drives the guide assembly 312 to move upward and reset by pushing the upper retaining ring 3123, and then drives the mesh plate 32 to move upward and reset, and finally repeats the above steps to punch holes continuously.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automated punching device for packaging film production, comprising a punching device, the punching device comprising a base and a gantry mounted on the top of the base, a telescopic cylinder mounted on the top of the gantry, an upper template fixedly connected to the bottom of the telescopic section of the telescopic cylinder, a plurality of lower concave dies distributed in a matrix are arranged on the top of the base, a plurality of upper convex dies matched one by one with the lower concave dies are fixedly connected to the bottom of the upper template, and the characteristics are: A stretching device is installed at the bottom of the upper template, a film pressing device is installed on the lower surface of the top of the gantry, and a waste collection device for collecting punching waste is also installed on the bottom platform; The stretching device includes a transverse stretching mechanism that is symmetrically distributed with respect to the bottom platform and stretches left and right, and a longitudinal stretching mechanism that is symmetrically distributed with respect to the bottom platform and stretches front and back. The transverse stretching mechanism and the longitudinal stretching mechanism cooperate to pull and flatten the packaging film. A first limiting mechanism and a second limiting mechanism are also installed on the top of the bottom platform to limit the transverse stretching mechanism and the longitudinal stretching mechanism respectively. The film pressing device includes a plurality of guide limit mechanisms which are distributed in a matrix on the top of the gantry and are adjusted up and down as the upper template moves up and down. The bottom of the guide limit mechanism passes through the bottom of the upper template and is connected to a screen. The screen slides up and down and is sleeved on the outside of the upper punch. The transverse stretching mechanism includes a first elastic telescopic rod fixedly connected to the bottom of the upper template and symmetrically distributed about the front and rear of the base, the bottom of the first elastic telescopic rod is fixedly connected with a connecting block and a second elastic telescopic rod in sequence, a roller frame is fixedly connected between the bottoms of the front and rear second elastic telescopic rods, a stretching roller is rotatably installed at the bottom of the roller frame, the stretching roller is located below the side of the guide roller away from the middle of the base, and the front and rear ends of the roller frame are fixedly connected with blocking rods; The longitudinal stretching mechanism includes an L-shaped slider installed on the top of the base for forward and backward sliding movement, the top of the horizontal section of the L-shaped slider is flush with the top of the base, the vertical section of the L-shaped slider is installed with a down-pressing block on the side close to the base for upward and downward sliding movement, the top of the down-pressing block is symmetrically connected with an inclined slot frame, one end of the inclined slot frame close to the corresponding vertical section of the L-shaped slider is inclined upward, and a down-pressing rod is installed inside the inclined slot frames on the same side of the front and rear for common sliding movement, and the left and right ends of the down-pressing rod are respectively fixedly connected with the corresponding connecting blocks; The guide limit mechanism includes a guide sleeve fixedly connected to the lower end surface of the top of the gantry, a guide assembly is installed on the bottom of the guide sleeve for sliding up and down, and a locking assembly for limiting the upward and downward sliding of the guide assembly and an unlocking assembly for releasing the restriction are installed inside the guide assembly.

2. The automatic punching equipment for packaging film production according to claim 1, characterized in that: Guide rollers are symmetrically rotatably mounted on the left and right sides of the base, the tops of the guide rollers are flush with the top of the base, and a driving motor is mounted on the side of the base to drive the guide rollers to rotate intermittently.

3. The automatic punching equipment for packaging film production according to claim 2 is characterized in that: The second limiting mechanism includes a baffle fixedly connected to the top of the base and located on the side of the L-shaped slider away from the center of the base, the middle part of the baffle is threaded and connected with a limiting bolt, and the baffle is fixedly connected to the side of the vertical section of the L-shaped slider with a return spring 1.

4. The automatic punching equipment for packaging film production according to claim 1, characterized in that: The guide assembly includes a guide rod which is slidably installed at the bottom of the guide sleeve and is hollow inside. A slow-down block is rotatably installed on the top of the guide rod. An elastic protrusion is provided on the outer ring surface of the slow-down block. The inner wall of the guide sleeve is provided with a recessed groove that cooperates with the elastic protrusion. The lower end of the guide rod is fixedly connected with an upper retaining ring and a lower retaining ring located outside the guide sleeve in sequence from top to bottom.

5. The automatic punching equipment for packaging film production according to claim 4, characterized in that: The locking assembly includes elastic rods which are symmetrically distributed in the inner cavity of the guide rod and whose bottoms are slidably connected to the bottom of the inner cavity of the guide rod. A hook is fixedly connected to the top of the elastic rod. A through hole is provided on the side wall of the guide rod for the hook to extend to the outside of the guide rod. Limiting grooves are provided on the inner walls on the left and right sides of the guide sleeve. The hooks penetrate the through holes and engage with the limiting grooves. A second reset spring is also fixedly connected between the left and right elastic rods.

6. The automatic punching equipment for packaging film production according to claim 5, characterized in that: The unlocking assembly includes a button which is slidably installed on the top of the lower baffle ring and is symmetrically distributed about the lower baffle ring. The bottom of the button passes through the interior of the lower baffle ring and is fixedly connected to a pushing block. A wedge block is fixedly connected to the side of the elastic rod close to the pushing block. The pushing block cooperates with the bottom of the pushing block, and a reset spring three is fixedly connected between the bottom of the pushing block and the bottom of the inner cavity of the lower baffle ring.

7. The automatic punching equipment for packaging film production according to claim 1, characterized in that: The waste collection device includes a filter box installed on the front side of the punching device. The bottom of the lower die is connected to the inlet end of the filter box through a suction pipe that is fixedly connected and communicated with the filter box. A negative pressure pump is fixedly installed at the outlet end of the filter box, and the suction pipe is located inside the base.

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