Laser alignment device of heat shrink film crosscut mechanism

Abstract

The utility model discloses a kind of laser alignment devices of heat shrink film transverse cutting mechanism, it is related to heat shrink film cutting technical field.The utility model includes, main body structure, including mounting bracket, fixedly placed in the support pipe of mounting bracket lower end inside, cutter located in the upper end of support pipe;Laser alignment structure, including fixedly placed in the display panel of mounting bracket front end front side, located between cutter and corresponding multiple groups laser transmitter and receiver, support rod located in the upper end of cutter, mounting block located in the one end of support rod, laser lamp located in the one end of mounting block, fixedly placed in the positioning box of mounting bracket upper end inner wall, curtain fixedly placed in the front end of positioning box, scale board fixedly placed in the upper end of curtain;Positioning structure, including the screw hole of being opened inside sleeve ring, screw rod with the screw thread installation of screw hole.The utility model is by being provided with laser alignment structure, to solve the problem that cutter adjustment does not have direct measuring tool, when the distance between cutter adjustment is checked, the compatibility between adjusting structure is poor, and the problem that checking is complicated.

Description

Technical Field

[0001] This utility model relates to the field of heat shrink film cutting technology, and in particular to a laser alignment device for a heat shrink film cross-cutting mechanism. Background Technology

[0002] Heat shrink film is a plastic film that shrinks when heated. It is made of polyolefin and has shrinkage, transparency and abrasion resistance. It is widely used in food and daily necessities packaging. The cross-cut structure includes unwinding, cutting and rewinding devices, which can efficiently cut large rolls of material into smaller rolls to ensure accurate dimensions.

[0003] Chinese patent discloses a plastic film slitting combination knife (authorization announcement number CN202462502U). This patented technology includes a crossbar fixed to the top of a support, three knife holders fitted on the crossbar, a knife shank fixed to one side of each knife holder, a knife head fixed to the front end of the knife shank, and a blade fixed to the knife head. An adjustment handle is provided on the knife holder. This utility model has a simple and reasonable structure, convenient and quick knife spacing adjustment, and three knives. During use, one, two, or all three knives can be selected for simultaneous use according to product needs, allowing for the simultaneous slitting of various film products of different sizes.

[0004] However, this patent still has shortcomings. While it allows for flexible adjustment of the cutter to accommodate different sizes of heat-shrink film, the adjustment distance relies directly on external measuring tools or the operator's experience. There are no direct measuring tools for calibrating the cutter adjustment distance, resulting in poor adaptability between adjustment structures and cumbersome calibration. Therefore, those skilled in the art have provided a laser alignment device for a heat-shrink film cross-cutting mechanism to solve the problems mentioned in the background. Utility Model Content

[0005] 1. Technical Solution

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a laser alignment device for a heat shrink film cross-cutting mechanism, comprising,

[0008] The main structure includes a mounting frame in the shape of a rectangular frame, a support tube fixed inside the lower end of the mounting frame, and a cutter located at the upper end of the support tube;

[0009] The laser alignment structure includes a display panel fixed to the front side of the mounting frame, multiple sets of laser emitters and receivers located between the cutters and corresponding to each other, a support rod located at the top of the cutter, a mounting block located at one end of the support rod, a laser lamp located at one end of the mounting block, a positioning box fixed to the inner wall of the upper end of the mounting frame, a screen fixed to the front of the positioning box, and a scale plate fixed to the top of the screen.

[0010] as well as;

[0011] The positioning structure includes a screw hole inside the collar, a screw rod threaded into the screw hole, and a clamping block located on one side of the screw rod with its inner wall adapted to the outer wall of the support tube.

[0012] Furthermore, the front window of the laser emitter is provided with longitudinally distributed collimating lenses;

[0013] Specifically, the divergence angle is compressed to 0.1°-1° to form a vertical linear beam, which effectively corresponds to the distribution of the scale at the front end of the scale plate.

[0014] Furthermore, a rotating seat is provided at one end of the clamping block, one end of the screw is rotatably installed inside the rotating seat, a torsion block is provided at one end of the screw, and the outer wall of the torsion block is provided with anti-slip texture;

[0015] Specifically, the rotational pulling force of the screw is applied to the rotating seat, and the gripping torsion block adjusts the screw rotation to avoid the rotational force being directly applied to the clamping block.

[0016] Furthermore, a sliding sleeve is embedded inside the collar, and a guide rod that is slidably inserted into the sliding sleeve is provided at one end of the clamping block. An installation groove is provided on the inner wall of the collar, and the clamping block is located inside the installation groove.

[0017] Specifically, when the clamping block moves, it slides inside the sliding mechanism via the guide rod, causing the linear movement of the screw to stabilize the movement of the clamping block, clamping the outer wall of the support tube, fixing the adjusted collar, and positioning the cutter after obtaining the angle.

[0018] Furthermore, a guide rail is provided on the outer wall of the upper end of the support tube, and a sliding groove is provided on the inner wall of the upper end of the collar to be slidably installed with the guide rail;

[0019] Specifically, the collar slides on the outer wall of the guide rail via a groove, which provides sliding guidance as the collar moves, ensuring that the blade of the cutter always remains perpendicular.

[0020] Furthermore, each end of the mounting frame is provided with a bracket, and each bracket has a part assembly slot inside;

[0021] Specifically, the bracket is used to install the mounting frame, and the assembly slot is used to assemble the fixed parts, thus fixing the mounting frame on the production line with the cross-section structure.

[0022] 2. Beneficial effects

[0023] Compared with existing technologies, the advantages of this utility model are:

[0024] In this invention, the cutter moves along the outer wall of the support tube via a collar. After reaching the designated position, it is fixed to the support ring by a screw driven by a threaded screw. The spacing between multiple cutters can be adjusted individually, and unused cutters can slide to the sides of the support tube for placement. When adjusting the spacing between the cutters, the laser generator emits horizontal laser pulses, which are received by a receiver. The receiver records the time difference between the emission of the beam and its reflection back from the object. Using the speed of light, the distance is calculated, and the spacing is displayed on the screen, allowing for direct understanding of the cutter spacing adjustment. Simultaneously, the displacement of the cutter can be observed through the laser light. The linear beam of the laser light projected onto the screen effectively corresponds to the scale on the graduation plate. By comparing the before and after adjustment, the cutter spacing adjustment can be intuitively understood. Furthermore, laser calibration is efficient, stable, and convenient to use.

[0025] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0029] Figure 3 This is a side sectional three-dimensional structural diagram of the support tube of this utility model;

[0030] Figure 4 This is a front-view three-dimensional structural diagram of the mounting block of this utility model;

[0031] Figure 5 This is a side view of the three-dimensional structure of the clamping block of this utility model.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 100. Main structure; 101. Mounting bracket; 102. Bracket; 103. Support tube; 104. Collar; 105. Cutting blade;

[0034] 200. Laser alignment structure; 201. Display panel; 202. Laser emitter; 203. Receiver; 204. Support rod; 205. Mounting block; 206. Laser light; 207. Positioning box; 208. Screen; 209. Scale plate; 210. Collimating lens;

[0035] 300. Positioning structure; 301. Mounting groove; 302. Guide rail; 303. Torsion block; 304. Slide groove; 305. Rotating seat; 306. Sliding sleeve; 307. Guide rod; 310. Clamping block. Detailed Implementation

[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0040] Example 1

[0041] Please see Figure 1-5 As shown, this embodiment is a laser alignment device for a heat-shrink film cross-cutting mechanism, comprising:

[0042] The main structure 100 includes a mounting frame 101 in the form of a rectangular frame, a support tube 103 fixed inside the lower end of the mounting frame 101, and a cutter 105 located at the upper end of the support tube 103.

[0043] The laser alignment structure 200 includes a display panel 201 fixed to the front side of the front end of the mounting bracket 101, multiple sets of laser emitters 202 and receivers 203 located between and corresponding to the cutters 105, a support rod 204 located at the upper end of the cutter 105, a mounting block 205 located at one end of the support rod 204, a laser lamp 206 located at one end of the mounting block 205, a positioning box 207 fixed to the inner wall of the upper end of the mounting bracket 101, a screen 208 fixed to the front end of the positioning box 207, and a scale plate 209 fixed to the upper end of the screen 208.

[0044] The front window of the laser emitter 202 is provided with longitudinally distributed collimating lenses 210;

[0045] Both ends of the mounting bracket 101 are provided with brackets 102, and each bracket 102 has a part assembly slot for the use of the laser alignment structure 200.

[0046] The main structure 100 of this utility model consists of a mounting frame 101, a support tube 103, and cutters 105. Multiple cutters 105 are slidably mounted on the upper end of the support tube 103 via a collar 104. The cutters 105 are made of hard alloy, with a blade inclination angle of 15° and the spacing between the cutters 105 can be adjusted independently. L-shaped brackets 102 are welded to both ends of the mounting frame 101. Assembly slots are opened inside the brackets 102, which are fixed to the production line frame by bolts. The laser alignment structure 200 includes a display panel 201, which is a 7-inch LCD touch screen and multiple laser emitters 202 with a wavelength of 650nm and a power of 5mW. A collimating lens 210 is installed in the emission window of the laser lamp 206, compressing the divergence angle to 0.1-1° to form a vertical linear beam. The receiver 203 is symmetrically arranged on the side wall of the adjacent cutter 105, and the distance between it and the transmitter is adjustable. The support rod 204 is vertically fixed to the top of the cutter 105, and its end is fixed to the laser lamp 206 through the mounting block 205. The light is green visible light. The laser lamp 206 projects the beam onto the screen 208 at the front of the positioning box 207. The screen 208 is made of semi-transparent frosted material, and the surface of the screen 208 is printed with a millimeter-level scale plate 209 with an accuracy of ±0.1mm.

[0047] During operation, the operator slides the collar 104 to adjust the spacing of the cutters 105. The laser emitter 202 emits pulse beams in real time, and the receiver 203 detects the reflected signals. The ToF algorithm is used to calculate the spacing between adjacent cutters 105 (formula: D=c·Δt / 2), and the data is displayed synchronously on the touch screen. At the same time, the laser lamp 206 projects a light spot onto the screen 208. The displacement of the cutter 105 is directly read according to the scale plate 209. For example, if the light spot moves from the scale of 50mm to 80mm after adjustment, the displacement is 30mm. This design achieves dual redundancy of "electronic measurement + visual calibration" to ensure the spacing accuracy reaches ±0.2mm, which is significantly more efficient than traditional manual measurement. For example, when cutting 1000mm wide heat shrink film, the spacing of the three cutters 105 is set to 300mm, 400mm, and 300mm. The laser alignment system can complete automatic calibration within a few seconds, avoiding waste of film material due to experience errors.

[0048] Example 2

[0049] Please see Figure 1-5 As shown, and;

[0050] The positioning structure 300 includes a screw hole inside the collar 104, a screw rod threaded into the screw hole, and a clamping block 310 located on one side of the screw rod and whose inner wall is adapted to the outer wall of the support tube 103.

[0051] One end of the clamping block 310 is provided with a rotating seat 305, one end of the screw is rotatably installed inside the rotating seat 305, and one end of the screw is provided with a torsion block 303, and the outer wall of the torsion block 303 is provided with anti-slip texture.

[0052] A sliding sleeve 306 is embedded inside the collar 104. A guide rod 307 that is slidably inserted into the sliding sleeve 306 is provided at one end of the clamping block 310. An installation groove 301 is opened on the inner wall of the collar 104, and the clamping block 310 is located inside the installation groove 301.

[0053] The upper outer wall of the support tube 103 is provided with a guide rail 302, and the upper inner wall of the collar 104 is provided with a sliding groove 304 that is slidably installed with the guide rail 302.

[0054] Use positioning structure 300;

[0055] The collar 104 is made of aluminum alloy and fits onto the outer wall of the support tube 103. Its inner wall has a sliding groove 304 that slides with the T-shaped guide rail 302 at the upper end of the support tube 103, ensuring that the blade of the cutter 105 remains perpendicular with an angle of less than 0.1° when moving. The collar 104 has radially opened M8 threaded holes on its sidewalls. The screw is made of 304 stainless steel with a pitch of 1.25mm. One end is hinged to the clamping block 310 via a rotating seat 305, and the other end connects to the knurled surface. The anti-slip twist block 303 and the clamping block 310 are equipped with polyurethane friction pads symmetrically distributed on both sides of the support tube 103. The clamping block 310 is welded to the tail of the guide rod 307. The guide rod 307 is inserted into the sliding sleeve 306 inside the collar 104. The sliding sleeve 306 is a self-lubricating copper sleeve, forming a linear moving pair. When the twist block 303 is rotated, the screw pushes the clamping block 310 to retract radially along the guide rod 307, locking the support tube 103 with a torque of 3-5 N·m and fixing the position of the cutter 105.

[0056] During operation, after releasing the clamping block 310, manually slide the collar 104 to the target position, such as a spacing of 250mm. Rotate the torsion block 303 clockwise by 180 degrees, and the screw feed will reach 0.625mm. The inner diameter of the clamping block 310 will decrease by 0.5mm, generating a clamping force of ≥200N through the friction pad. The guide rod 307 and the sliding sleeve 306 cooperate to eliminate radial wobbling and ensure positioning repeatability of ±0.05mm. For example, when slitting POF heat shrink film with a thickness of 80μm, adjust the distance between the two cutters 105 to the design value of 500mm and then lock them to ensure no displacement or offset. The slitting size fluctuation is ≤±0.3mm. No tools are required, which is suitable for the high-speed changeover requirements of the production line.

[0057] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laser alignment device for a heat-shrink film cross-cutting mechanism, characterized in that: include, The main structure (100) includes a mounting frame (101) in the shape of a rectangular frame, a support tube (103) fixed inside the lower end of the mounting frame (101), and a cutter (105) located at the upper end of the support tube (103); The laser alignment structure (200) includes a display panel (201) fixed to the front side of the front end of the mounting frame (101), multiple sets of laser emitters (202) and receivers (203) located between the cutters (105) and corresponding to each other, a support rod (204) located at the upper end of the cutter (105), a mounting block (205) located at one end of the support rod (204), a laser lamp (206) located at one end of the mounting block (205), a positioning box (207) fixed to the inner wall of the upper end of the mounting frame (101), a screen (208) fixed to the front end of the positioning box (207), and a scale plate (209) fixed to the upper end of the screen (208). as well as; The positioning structure (300) includes a screw hole inside the collar (104), a screw rod threaded into the screw hole, and a clamping block (310) located on one side of the screw rod and whose inner wall is adapted to the outer wall of the support tube (103).

2. The laser alignment device for a heat-shrink film cross-cutting mechanism according to claim 1, characterized in that: The front window of the laser emitter (202) is provided with a longitudinally distributed collimating lens (210).

3. The laser alignment device for a heat-shrink film cross-cutting mechanism according to claim 1, characterized in that: One end of the clamping block (310) is provided with a rotating seat (305), one end of the screw is rotatably installed inside the rotating seat (305), one end of the screw is provided with a torsion block (303), and the outer wall of the torsion block (303) is provided with anti-slip texture.

4. The laser alignment device for a heat-shrink film cross-cutting mechanism according to claim 1, characterized in that: A sliding sleeve (306) is embedded inside the collar (104), and a guide rod (307) is provided at one end of the clamping block (310) and slidably inserted into the sliding sleeve (306). An installation groove (301) is provided on the inner wall of the collar (104), and the clamping block (310) is located inside the installation groove (301).

5. The laser alignment device for a heat-shrink film cross-cutting mechanism according to claim 1, characterized in that: The upper outer wall of the support tube (103) is provided with a guide rail (302), and the upper inner wall of the collar (104) is provided with a sliding groove (304) that is slidably installed with the guide rail (302).

6. The laser alignment device for a heat-shrink film cross-cutting mechanism according to claim 1, characterized in that: The mounting bracket (101) is provided with a bracket (102) at both ends, and the bracket (102) is provided with a parts assembly slot inside.

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