Process for producing a stretch wrap film and apparatus therefor

Abstract

The present application relates to the production equipment field of wrapping film, and specifically discloses a production process and production equipment of stretching wrapping film, comprising the following steps: S1. respectively placing first layer film plastic particles and second layer film plastic particles into a casting machine to perform casting film forming, obtaining the stretching wrapping film; S2. introducing the stretching wrapping film into a combing and edge cutting machine, using a guide roller and a transmission roller assembly to pull the stretching wrapping film flat, then according to the thickness of the stretching wrapping film, moving a driving motor, and further moving the position of a cutting wheel, making the cutting wheel drop through the weight of the cutting wheel and the counterweight rotating shaft itself, and further adjusting the spacing between the cutting wheel and the stretching wrapping film. The present application moves the driving motor, simultaneously moves the position of the cutting wheel, makes the cutting wheel drop through the weight of the cutting wheel and the counterweight rotating shaft itself, and further adjusts the spacing between the cutting wheel and the stretching wrapping film, so as to adapt to the composite stretching wrapping film with different thicknesses, and the operation is simplified.

Description

Technical Field

[0001] This invention relates to the field of stretch wrap production equipment, and more specifically to a stretch wrap production process and its production equipment. Background Technology

[0002] Stretch wrap film is a type of plastic film with high toughness and elasticity. It boasts advantages such as tear resistance, high adhesion, thinness, cold resistance, heat resistance, pressure resistance, dustproofing, and waterproofing. Therefore, it is widely used in papermaking, logistics, chemical, plastic raw material, building materials, food, and glass industries.

[0003] In the production process of stretch wrap film, due to the varying thicknesses of the composite stretch wrap film, the cutting tools need to be frequently changed to adjust their positions, making the operation process complex. For example, utility model patent CN221274803U discloses a stretch wrap film slitting device. This device includes a slitting shaft and several sets of spliced ​​slitting blades mounted on the slitting shaft. The slitting shaft is equipped with a top frame and a fixing frame; several evenly spaced, linearly arranged locking screw holes are symmetrically opened on both sides of the outer wall of the slitting shaft; each set of slitting blades includes two sets of semi-circular blades spliced ​​together. This structure still requires assembly and disassembly, involving complex assembly and disassembly operations. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a production process for stretch wrap film, which solves the shortcomings of existing stretch wrap film production processes that require frequent replacement of cutting tools to adjust the position of the cutting tools in order to handle composite stretch wrap films of different thicknesses, resulting in a complicated operation process.

[0005] The technical solution adopted in this invention is as follows:

[0006] A process for producing stretch wrap film includes the following steps:

[0007] S1. Place the first layer of film plastic particles and the second layer of film plastic particles into a casting machine respectively, and cast them into films to obtain a stretch wound film;

[0008] S2. The stretch wrap film is introduced into the combing and trimming machine. The guide roller and drive roller assembly are used to flatten the stretch wrap film. Then, according to the thickness of the stretch wrap film, the position of the cutting wheel is moved by moving the drive motor. The weight of the cutting wheel and the counterweight shaft itself causes the cutting wheel to drop, thereby adjusting the distance between the cutting wheel and the stretch wrap film.

[0009] The present application moves the driving motor, simultaneously moves the position of the cutting wheel, makes the cutting wheel fall down through the weight of the cutting wheel and the counterweight rotating shaft itself, and further adjusts the distance between the cutting wheel and the stretched wrapping film to adapt to the composite stretched wrapping film with different thicknesses, which is simple in operation and accurate in control.

[0010] Optionally, the first layer film plastic particles are prepared by mixing raw materials of the first layer film, and then extruding the first mixture through a screw extruder.

[0011] Optionally, the second layer film plastic particles are prepared by mixing raw materials of the second layer film, and then extruding the mixture through a screw extruder.

[0012] The present application further discloses a production equipment of the stretched wrapping film, in particular a combing, flattening and trimming machine.

[0013] Optionally, the cutting device comprises a box body, a supporting rod is arranged at the bottom of the box body, a first horizontal rod is arranged at the upper end of the supporting rod, a fixing cylinder is arranged on the first horizontal rod, a driving motor is slidably arranged in the fixing cylinder, a first transmission shaft is arranged on the output shaft of the driving motor, a first umbrella-shaped gear is arranged on the first transmission shaft, an outer cover connected with the outer shell of the driving motor is arranged outside the first transmission shaft, the outer cover is provided with an extension rod extending outward, the extension rod is detachably connected with a second horizontal rod, a second transmission shaft perpendicular to the first transmission shaft is rotatably arranged at the end of the second horizontal rod, a second umbrella-shaped gear is arranged on the second transmission shaft, the first umbrella-shaped gear is engaged with the second umbrella-shaped gear, a first transmission wheel is arranged on the side of the second transmission shaft away from the second horizontal rod, a second transmission wheel is arranged in parallel below the first transmission wheel, the first transmission wheel is drivingly connected with the second transmission wheel through a stretching transmission belt, a counterweight rotating shaft is arranged at the center of the second transmission wheel, a cutting wheel is arranged on the counterweight rotating shaft, and the first horizontal rod is connected with the fixing cylinder through a connecting piece.

[0014] Optionally, an end portion is arranged at the end of the second horizontal rod, and a second transmission shaft perpendicular to the first transmission shaft is rotatably arranged on the end portion.

[0015] Optionally, the extension rod adopts a telescopic rod structure.

[0016] Optionally, the bottom of the supporting rod is hingedly connected with the bottom of the box body, a fixed block is arranged on the inner side wall of the front end side plate of the box body, a sliding groove with a top seal is arranged on the fixed block, and the front end of the counterweight rotating shaft is inserted into the sliding groove.

[0017] Optionally, the stretching transmission belt comprises an extension layer on the outer layer and a reinforcing wire core inside the extension layer, and the reinforcing wire core is stretchable and flexible.

[0018] Optionally, the extension layer is provided with wave patterns extending along the length direction and deformation grooves extending along the width direction.

[0019] In summary, the present application has at least the following advantages:

[0020] 1. The present application moves the driving motor, and then moves the position of the cutting wheel, so that the cutting wheel falls under the weight of the cutting wheel and the counterweight rotating shaft itself, thereby adjusting the distance between the cutting wheel and the stretched wrapping film to adapt to the composite stretched wrapping film of different thicknesses, which is simple to operate and accurate in control.

[0021] 2. The present application is provided with a second transmission wheel parallel to the first transmission wheel below, the first transmission wheel is connected to the second transmission wheel through the stretching transmission belt, the second transmission wheel is provided with a counterweight rotating shaft at the center, and the cutting wheel is arranged on the counterweight rotating shaft, so that the cutting wheel is below the driving motor and lower than the bottom end of the supporting rod.

[0022] 3. The present application is provided with an extension rod in the structure of a telescopic rod, which facilitates the adjustment of the distance between the cutting wheels of a pair of cutting devices and the adjustment of the width of the cutting edge.

[0023] 4. The counterweight rotating shaft of the present application is inserted into the sliding groove, so that the counterweight rotating shaft moves up and down along the sliding groove, and the rotation and movement of the counterweight rotating shaft are more stable, but it is necessary to ensure that the stretching transmission belt has the deformation ability.

[0024] 5. The stretching transmission belt of the present application comprises an extension layer on the outer layer and a reinforcing wire core inside the extension layer, and the reinforcing wire core is stretchable and flexible, which enhances the tensile strength; the extension layer is provided with wave patterns extending along the length direction and deformation grooves extending along the width direction, the wave patterns enhance the friction force in the transverse direction, and the deformation grooves extending along the width direction further enhance the friction force in the vertical direction. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of the production equipment of the stretched wrapping film of embodiment 2 of the present application;

[0026] Figure 2 is an internal structure explosion view of the cutting device of the production equipment of the stretched wrapping film of embodiment 2 of the present application;

[0027] Figure 3 is a first rotating shaft and a second transmission shaft of the cutting device of the production equipment of the stretched wrapping film of embodiment 2 of the present application;

[0028] Figure 4 is an internal structure exploded view of the cutting device of the stretch wrapping film production equipment of Embodiment 3 of the present application;

[0029] Figure 5 is a perspective view of a fixing block of an inner side wall of a box front end side plate of the cutting device of the stretch wrapping film production equipment of Embodiment 3 of the present application;

[0030] Figure 6 is an internal structure exploded view of the cutting device of the stretch wrapping film production equipment of Embodiment 4 of the present application;

[0031] Figure 7 is an internal structure view of the stretch conveying belt of the cutting device of the stretch wrapping film production equipment of Embodiment 5 of the present application.

[0032] The reference signs in the drawings are as follows:

[0033] 1, frame, 2, guide roller, 3, transmission roller assembly, 4, support plate, 5, cutting device, 6, box, 7, support rod, 8, first cross rod, 9, fixing cylinder, 10, driving motor, 11, first transmission shaft, 12, first umbrella gear, 13, extension rod, 14, second cross rod, 15, second transmission shaft, 16, second umbrella gear, 17, first transmission wheel, 18, second transmission wheel, 19, counterweight rotating shaft, 20, cutting wheel, 21, extension layer, 22, reinforcing wire core,

[0034] 23, corrugation, 24, deformation groove, 25, cover, 26, end, 27, stretch conveying belt, 28, connecting sheet, 29, fixing block, 30, sliding groove. DETAILED DESCRIPTION

[0035] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0036] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] Embodiment 1

[0038] The technical scheme adopted by the present application is as follows:

[0039] The present application discloses a production process of stretch wrapping film, comprising the following steps:

[0040] S1. The first layer of film plastic particles is prepared by mixing the raw materials of the first layer of film, and then extruding the first mixture through a screw extruder.

[0041] S2. The second layer of film plastic particles is prepared by mixing the raw materials of the second layer of film, and then extruding the mixture through a screw extruder.

[0042] S3. The first layer of film plastic particles and the second layer of film plastic particles are respectively placed into a casting machine to perform casting film forming, and a stretch wrapping film is obtained.

[0043] S4. The stretch wrapping film is introduced into a combing and edge cutting machine, the stretch wrapping film is pulled flat by using a guide roller and a transmission roller assembly, then according to the thickness of the stretch wrapping film, the position of the cutting wheel is moved by moving a driving motor, the cutting wheel is lowered by the weight of the cutting wheel and the counterweight shaft itself, and the distance between the cutting wheel and the stretch wrapping film is adjusted.

[0044] Embodiment 2

[0045] As Figure 1 , Figure 2 and Figure 3As shown, the present application also discloses a production equipment of stretch wrapping film, specifically a combing and trimming machine, the combing and trimming machine comprises a rack 1, a guide roller 2 is arranged at the front end of the rack, a transmission roller assembly 3 is arranged on the rack at the rear end of the guide roller, a support plate 4 is arranged at the rear end of the rack, a pair of cutting devices 5 are arranged on the support plate, the cutting device comprises a box body 6, a support rod 7 is arranged at the bottom of the box body, a first horizontal rod 8 is arranged at the upper end of the support rod, a fixed cylinder 9 is arranged on the first horizontal rod, a driving motor 10 is arranged in the fixed cylinder in a sliding manner, a first transmission shaft 11 is arranged on the output shaft of the driving motor, a first umbrella-shaped gear 12 is arranged on the first transmission shaft, an outer cover 25 connected with the outer shell of the driving motor is arranged on the outside of the first transmission shaft, the outer cover is provided with an extension rod 13 extending outward, the extension rod is detachably connected with a second horizontal rod 14, an end portion 26 is arranged at the end of the second horizontal rod, a second transmission shaft 15 perpendicular to the first transmission shaft is rotatably arranged on the end portion, a second umbrella-shaped gear 16 is arranged on the second transmission shaft, the first umbrella-shaped gear is engaged with the second umbrella-shaped gear, a first transmission wheel 17 is arranged on the side of the second transmission shaft away from the end portion, a second transmission wheel 18 is arranged in parallel below the first transmission wheel, the first transmission wheel is drivingly connected with the second transmission wheel through a stretch transmission belt 27, a counterweight rotating shaft 19 is arranged at the center of the second transmission wheel, and a cutting wheel 20 is arranged on the counterweight rotating shaft. The first horizontal rod is connected with the fixed cylinder through a connecting piece 28 made of plastic material. The plastic connecting piece is made of plastic material which is easier to deform and has smaller size.

[0046] In this embodiment, the bottom of the box body is provided with an opening to facilitate the downward extension of the cutting wheel.

[0047] In this embodiment, the stretch wrapping film is introduced into the combing and trimming machine, the stretch wrapping film is flattened by the guide roller and the transmission roller assembly, then the position of the cutting wheel is moved by moving the driving motor according to the thickness of the stretch wrapping film, the cutting wheel is lowered by the weight of the cutting wheel and the counterweight rotating shaft itself, and the distance between the cutting wheel and the stretch wrapping film is adjusted.

[0048] Embodiment 3

[0049] As shown in Figure 4 , Figure 5 Embodiment 3 is different from Embodiment 2 in that the bottom of the support rod is hinged to the bottom of the box body. The bottom of the box body is provided with a hinge seat, and the hinge seat is hinged to the support rod. A fixed block 29 is arranged on the inner side wall of the front end side plate of the box body, a sliding groove 30 with a top seal is arranged on the fixed block, and the front end of the counterweight rotating shaft is inserted into the sliding groove.

[0050] Embodiment 4

[0051] As shown in Figure 6As shown in the figure, the difference between example 4 and example 2 is that the extension rod is in the structure of a telescopic rod. The telescopic rod comprises an outer tube and an inner tube, and the inner tube is inserted into the outer tube.

[0052] Example 5

[0053] As shown in the figure, the difference between example 5 and example 2 is that the stretching transmission belt comprises an extension layer 21 located at the outer layer and a reinforcing wire core 22 located inside the extension layer, and the reinforcing wire core can be stretched and deformed to stretch and contract. Figure 7

[0054] The surface of the extension layer is provided with wave patterns 23 extending along the length direction and deformation grooves 24 extending along the width direction.

[0055] The above is only the preferred embodiment of the present application, and does not limit the patent protection scope of the present application. Any equivalent structural transformation, direct or indirect application in other related technical fields, is also included in the protection scope of the present application.​

Claims

1. An apparatus for producing a stretch wrap film, characterized by, The application relates to a combing and trimming machine, which comprises a rack, a guide roller arranged at the front end of the rack, a driving roller assembly arranged at the rear end of the rack, a support plate arranged at the rear end of the rack, and at least one pair of height-adjustable cutting devices arranged on the support plate; the cutting device comprises a box body, a support rod arranged at the bottom of the box body, a first horizontal rod arranged at the upper end of the support rod, a fixed cylinder arranged on the first horizontal rod, a driving motor telescopically arranged in the fixed cylinder, a first transmission shaft arranged on the output shaft of the driving motor, a first umbrella-shaped gear arranged on the first transmission shaft, an outer cover connected with the outer shell of the driving motor and arranged outside the first transmission shaft, an extension rod arranged on the outer cover and extending outward, a second horizontal rod detachably connected with the extension rod, a second transmission shaft arranged at the end of the second horizontal rod and perpendicular to the first transmission shaft, a second umbrella-shaped gear arranged on the second transmission shaft, a first transmission wheel arranged on the side of the second transmission shaft away from the second horizontal rod, a second transmission wheel arranged below the first transmission wheel and parallel to the first transmission wheel, a stretching transmission belt arranged between the first transmission wheel and the second transmission wheel, a counterweight rotating shaft arranged at the center of the second transmission wheel, and a cutting wheel arranged on the counterweight rotating shaft; the first horizontal rod is connected with the fixed cylinder through a connecting piece; the stretching transmission belt comprises an extension layer arranged at the outer layer and a reinforcing wire core arranged inside the extension layer; the reinforcing wire core can be stretched and deformed to be telescopic.

2. The apparatus for producing a stretch wrap film according to claim 1, wherein The end of the second horizontal rod is provided with an end portion, and the second transmission shaft is rotatably arranged on the end portion and perpendicular to the first transmission shaft; and the first transmission wheel is arranged on the side away from the second horizontal rod.

3. The apparatus for producing a stretch wrap film according to claim 1, wherein The extension rod adopts the structure of a telescopic rod.

4. The apparatus for producing a stretch wrap film according to claim 1, wherein The bottom of the support rod is hingedly connected with the bottom of the box body; the inner side wall of the front end side plate of the box body is provided with a fixed block, the fixed block is provided with a sliding groove with a top seal, and the front end of the counterweight rotating shaft is inserted into the sliding groove.

5. The apparatus for producing a stretch wrap film according to claim 1, wherein The surface of the extension layer is provided with wave patterns extending along the length direction and deformation grooves extending along the width direction.

6. A process for producing a stretch wrap film, characterized by, The application is applied to the production equipment of the stretching wrapping film as claimed in claim 1 and comprises the following steps: S1. respectively placing first layer film plastic particles and second layer film plastic particles into a flow casting machine to perform flow casting film forming to obtain a stretching wrapping film; S2. introducing the stretching wrapping film into the combing and trimming machine, using the guide roller and the driving roller assembly to pull the stretching wrapping film flat, then moving the driving motor according to the thickness of the stretching wrapping film, further moving the position of the cutting wheel, and using the weight of the cutting wheel and the counterweight rotating shaft itself to make the cutting wheel drop, thereby adjusting the distance between the cutting wheel and the stretching wrapping film.

7. A process for the production of a stretch wrap film according to claim 6, characterized in that, The first layer film plastic particles are prepared by mixing raw materials of the first layer film and then extruding the first mixture through a screw extruder.

8. A process for producing a stretch wrap film as claimed in claim 6, wherein, The second layer film plastic particles are prepared by mixing raw materials of the second layer film and then extruding the mixture through a screw extruder.

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