Two-end-through shrink film automatic suspension thermal shrinkage device and packaging machine

Abstract

The utility model relates to a shrink film automatic suspension thermal shrinkage device and packing machine with both ends passing through, including: feeding rack, conveying assembly, grabbing assembly and heating furnace, conveying assembly includes conveying rack and limit guide rail, conveying rack is provided on the top of feeding rack, limit guide rail edge is provided on the top of conveying rack, and the heating furnace is provided with the heating furnace. The distance between the heating sections of the two limiting guide rails is smaller than that between the clamping sections and the releasing sections; a plurality of first chain wheels are arranged on the conveying frame and connected through a first chain. The grabbing assembly comprises a telescopic sleeve rod and clamping jaws, the two ends of the telescopic sleeve rod are connected with the limiting guide rails, the telescopic sleeve rod is connected with the first chain, and the clamping jaws are symmetrically arranged and connected with the other side of the first chain; the heating furnace is arranged at the bottom of the conveying frame and arranged at the bottom of the heating section of the limiting guide rail. The surface, needing heat shrink packaging, of the whole product is suspended, after the product enters a heating furnace, the stress of the whole heat shrink film is uniform, the heat shrink film on the surface of the product is prevented from wrinkling, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of cosmetic packaging technology, and in particular to an automatic suspended heat shrink device and packaging machine for a two-end open shrink film. Background Technology

[0002] Two-way shrink film is a specific type of heat shrink film used in practical applications based on packaging shapes. Its core characteristic is that both ends of the packaged item remain open (i.e., "open at both ends"). For example, a strip-shaped cosmetic box needs to be covered with a layer of heat shrink film on the outside, and the surface of the heat shrink film is printed with product information and logos.

[0003] The existing heat shrinking process using shrink film involves placing the product with the shrink film on the production line of the shrink oven, where it enters the oven and shrinks through circulating hot air. Because the bottom of the product is in direct contact with the production line, the bottom experiences uneven stress compared to the other three sides, resulting in uneven shrinkage of the shrink film and causing problems such as wrinkles and lettering deformation in the heat shrink film. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the quality defects in the prior art, such as uneven surface stress of the heat-shrinkable film at both ends, which leads to wrinkles and font deformation in the product.

[0005] To solve the above-mentioned technical problems, this utility model provides an automatic suspended heat shrink device for shrink film with open ends, comprising:

[0006] Material feeding rack;

[0007] A conveying assembly includes a conveying frame and a pair of limiting guide rails. The input end of the conveying frame is located above the output end of the loading frame. The pair of limiting guide rails are symmetrically arranged on the top of the conveying frame along its length. Each limiting guide rail includes a clamping section, a heating section, and a releasing section. The distance between the heating sections of the two limiting guide rails is smaller than the distance between the clamping and releasing sections. The output end of the loading frame is located at the bottom of the conveying frame near the clamping section. The conveying frame has multiple first sprockets arranged along its length axis, and the multiple first sprockets are connected by a first chain.

[0008] At least one set of gripping components, the gripping components including a telescopic sleeve and a pair of grippers, the two ends of the telescopic sleeve are slidably connected to the limiting guide rail, one side of the telescopic sleeve is connected to the first chain, and the pair of grippers are symmetrically arranged on the side of the telescopic sleeve away from the first chain;

[0009] A heating furnace is disposed at the bottom of the conveyor frame and at the bottom of the heating section of the limiting guide rail.

[0010] In one embodiment of this utility model, a drive roller is provided on the feeding rack, a conveyor belt is wrapped around the outside of the drive roller, and a second sprocket is provided at one end of the drive roller.

[0011] In one embodiment of the present invention, the conveying assembly further includes a drive shaft, the first sprocket is sleeved on the drive shaft, a third sprocket is provided at one end of the drive shaft, and a second chain is provided between the third sprocket and the second sprocket.

[0012] In one embodiment of the present invention, the gripping component further includes rollers, which are disposed at both ends of the telescopic sleeve rod and are embedded inside the limiting guide rail.

[0013] In one embodiment of this utility model, a limiting slot is provided on the opposite side of the limiting guide rail, and the size of the limiting slot is smaller than the diameter of the roller.

[0014] In one embodiment of this utility model, the telescopic sleeve includes a first rod and a second rod, one end of the first rod is sleeved on the outside of the second rod, and a pair of grippers are respectively connected to the first rod and the second rod.

[0015] In one embodiment of this utility model, a connecting block is provided between the telescopic sleeve rod and the first chain, the surface of the connecting block is provided with a sliding groove, the sliding groove is provided along the axial direction of the telescopic sleeve rod, and the surface of the telescopic sleeve rod is provided with a slider that cooperates with the sliding groove.

[0016] In one embodiment of this utility model, the gripper includes a support rod and a clamping rod, one end of the support rod is connected to a telescopic sleeve rod, and the other end of the support rod is detachably connected to the clamping rod.

[0017] In one embodiment of the present invention, a clamping block is provided at the end of the clamping rod away from the support rod, and the clamping block is detachably connected to the clamping rod.

[0018] A packaging machine includes the aforementioned automatic suspended heat shrink device for shrink film with both ends open.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] This utility model describes an automatic suspended heat shrink device and packaging machine for double-ended shrink film. This utility model changes the length of the telescopic sleeve rod by limiting guide rail, and controls the grippers to clamp the two ends of the product, so that the entire surface of the product that needs to be heat-shrink packaged is suspended. After entering the heating furnace, the entire heat shrink film is subjected to uniform force, preventing wrinkles on the surface of the heat shrink film and improving the production quality of the product. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a side view of the overall structure of this utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the upper and middle material racks;

[0024] Figure 3 This is a main sectional view of the overall structure of this utility model;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure of the crawling component;

[0026] Figure 5 for Figure 3 A partial structural diagram at point A in the middle;

[0027] Figure 6 for Figure 3 A structural cross-sectional view of the connecting block;

[0028] Figure 7 This is a top view of the conveying component in this utility model;

[0029] Figure 8 for Figure 7 Schematic diagram of the middle limit guide rail;

[0030] Explanation of reference numerals in the accompanying drawings: 1. Feeding rack; 2. Conveying assembly; 3. Gripping assembly; 4. Heating furnace; 11. Drive roller; 12. Conveyor belt; 13. Second sprocket; 21. Conveying frame; 22. Limiting guide rail; 23. First sprocket; 24. First chain; 25. Drive shaft; 26. Third sprocket; 27. Second chain; 28. Connecting block; 31. Telescopic sleeve; 32. Gripper; 33. Roller; 34. Slider; 221. Clamping section; 222. Heating section; 223. Releasing section; 224. Limiting slot; 281. Slide groove; 311. First rod; 312. Second rod; 321. Support rod; 322. Clamping rod; 323. Clamping block. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0032] Reference Figure 1 As shown, this utility model discloses an automatic suspended heat shrink device for a two-ended shrink film, comprising:

[0033] Feeding rack 1;

[0034] Conveyor component 2, refer to Figures 3-8 As shown, the conveying assembly 2 includes a conveying frame 21 and a pair of limiting guide rails 22. The input end of the conveying frame 21 is located at the top of the output end of the loading rack 1. The pair of limiting guide rails 22 are symmetrically arranged at the top of the conveying frame 21 along its length. Each limiting guide rail 22 includes a clamping section 221, a heating section 222, and a releasing section 223. The distance between the heating sections 222 of the two limiting guide rails 22 is smaller than the distance between the clamping section 221 and the releasing section 223. The output end of the loading rack 1 is located at the bottom of the conveying frame 21 near the clamping section 221. The conveying frame 21 is provided with a plurality of first sprockets 23 along its length axis, and the plurality of first sprockets 23 are connected by a first chain 24.

[0035] At least one set of crawling components 3, refer to Figures 3-4 As shown, the gripping component 3 includes a telescopic sleeve 31 and a pair of grippers 32. The two ends of the telescopic sleeve 31 are slidably connected to the limiting guide rail 22, and one side of the telescopic sleeve 31 is connected to the first chain 24. The pair of grippers 32 are symmetrically arranged on the side of the telescopic sleeve 31 away from the first chain 24.

[0036] A heating furnace 4 is disposed at the bottom of the conveyor frame 21 and at the bottom of the heating section 222 of the limiting guide rail 22.

[0037] In this utility model, the loading rack 1 is used to transport the product to be packaged. The product is transported to the bottom of the conveyor rack 21. Using the special structure of the limiting guide rail 22, the gripping component 3 is driven to move. The gripping component 3 clamps the two ends of the product on the loading rack 1, so that the entire product is suspended in the air and enters the heating furnace 4 along the conveyor rack 21 for heat shrink packaging of the product surface.

[0038] Specifically, multiple first sprockets 23 are installed on the conveyor frame 21 of the conveying assembly 2. These first sprockets 23 are connected by a first chain 24, allowing the first chain 24 to convey the gripping assembly 3 on the conveyor frame 21. A pair of limiting guide rails 22 in this invention are used to restrict the gripping assembly 3, enabling clamping and releasing. Specifically, the entire limiting guide rail 22 is divided into three parts: a clamping section 221, a heating section 222, and a releasing section 223. The distance between the two limiting guide rails 22 in the heating section 222 is less than the distance between their two ends (clamping section 221 and releasing section 223). The two ends of the heating section 222 have an arc-shaped transition with the clamping section 221 and the releasing section 223, ensuring smooth movement of the telescopic sleeve 31 and stability of the clamped product. Furthermore, the limiting guide rails 22 are arranged in a ring on the conveyor frame 21, and the distance between the pair of limiting guide rails 22 can be adjusted to accommodate products of different sizes.

[0039] The telescopic sleeve 31 in the gripping assembly 3 can extend and retract, driving a pair of grippers 32 at the bottom to move relative to or away from each other. Secondly, the telescopic sleeve 31 is connected to the first chain 24, enabling circular motion on the conveyor frame 21. The first chain 24 also ensures precise positioning of the gripping assembly 3. Specifically, the two ends of the telescopic sleeve 31 are positioned between two limiting guide rails 22. Moving along the limiting guide rails 22, the distance between the two grippers 32 is relatively large when the telescopic sleeve 31 is in the clamping section 221. When the telescopic sleeve 31 moves to the clamping section 221 of the limiting guide rail 22, it is guided by the limiting guide rail 22, causing it to retract and simultaneously driving the grippers 32 to clamp the product on the loading rack 1. At this time, the two ends of the clamped product are in contact with the grippers 32, and the area requiring heat shrinkage is circumferentially suspended. The heating furnace 4 is located at the bottom of the heating section 222. The product enters the heating furnace 4 through the heating section 222 for heat shrink packaging. After the packaged product exits the heating furnace 4, the telescopic sleeve 31 enters the release section 223 to unload the packaged product. As a preferred embodiment of this invention, in actual operation, multiple gripping components 3 can be installed on the conveyor frame 21 to improve production efficiency.

[0040] This invention changes the length of the telescopic sleeve rod 31 by limiting the guide rail 22, and controls the gripper 32 to clamp the two ends of the product, so that the entire surface of the product that needs to be heat-shrink packaged is suspended. After entering the heating furnace 4, the entire heat-shrink film is subjected to uniform force, preventing wrinkles in the heat-shrink film on the product surface and improving the production quality of the product.

[0041] Furthermore, referring to Figure 2 As shown, a drive roller 11 is provided on the feeding rack 1, and a conveyor belt 12 is wrapped around the outside of the drive roller 11. A second sprocket 13 is provided at one end of the drive roller 11.

[0042] Specifically, a second sprocket 13 is provided at one end of the drive roller 11, driving the second sprocket 13 to rotate, thereby moving the conveyor belt 12 on the surface of the drive roller 11. As a preferred embodiment of this invention, the conveying assembly 2 further includes a drive shaft 25, with the first sprocket 23 sleeved on the drive shaft 25. A third sprocket 26 is provided at one end of the drive shaft 25, and a second chain 27 is provided between the third sprocket 26 and the second sprocket 13. The second sprocket 13 and the third sprocket 26 are connected by the second chain 27, and the second sprocket 13 and the third sprocket 26 have the same angular velocity, ensuring that the speed of the first chain 24 is the same as that of the conveyor belt 12. The gripping assembly 3 remains relatively stationary with respect to the product on the conveyor belt 12, allowing the gripper 32 to accurately grip the product. In actual operation, positions can be manually marked on the conveyor belt 12 according to its speed; these marked positions correspond one-to-one with the distances between the multiple gripping assemblies 3.

[0043] Furthermore, referring to Figure 4 As shown, the gripping component 3 also includes rollers 33, which are disposed at both ends of the telescopic sleeve 31 and are embedded inside the limiting guide rail 22.

[0044] The rollers 33 at both ends of the telescopic sleeve 31 can move easily along the limiting guide rails 22. Specifically, the rollers 33 are embedded in the limiting guide rails 22. As the rollers 33 move from the clamping section 221 to the heating section 222, the distance between the two limiting guide rails 22 narrows, squeezing the telescopic sleeve 31 and realizing the clamping action of the grippers 32. When the rollers 33 move from the heating section 222 to the releasing section 223, the distance between the limiting guide rails 22 widens, the two grippers 32 open, and the product is released.

[0045] Furthermore, referring to Figure 5 As shown, a limiting slot 224 is provided on one side of the limiting guide rail 22, and the size of the limiting slot 224 is smaller than the diameter of the roller 33. Specifically, the function of the limiting slot 224 is to limit the axial movement of the roller 33, which can realize the extension and retraction of the telescopic sleeve 31, and also prevent the roller 33 from disengaging from the limiting guide rail 22.

[0046] Furthermore, referring to Figure 4 As shown, the telescopic sleeve 31 includes a first rod 311 and a second rod 312. One end of the first rod 311 is sleeved on the outside of the second rod 312, and a pair of grippers 32 are respectively connected to the first rod 311 and the second rod 312.

[0047] Specifically, the first rod 311 is sleeved on the outside of the second rod 312, and the first rod 311 and the second rod 312 reciprocate along the axial direction, driving the two grippers 32 at the bottom to clamp and release.

[0048] Furthermore, referring to Figures 3-6 As shown, a connecting block 28 is provided between the telescopic sleeve 31 and the first chain 24. The surface of the connecting block 28 is provided with a sliding groove 281, which is arranged along the axial direction of the telescopic sleeve 31. The surface of the telescopic sleeve 31 is provided with a slider 34 that cooperates with the sliding groove 281.

[0049] Specifically, the telescopic sleeve 31 is connected to the chain via a connecting block 28, enabling synchronous movement between the telescopic sleeve 31 and the first chain 24. The surface of the connecting block 28 is provided with a sliding groove 281, and the telescopic sleeve 31 is slidably connected to the sliding groove 281 via a slider 34. This ensures synchronous movement between the telescopic sleeve 31 and the first chain 24 and also guides the axial movement of the telescopic sleeve 31, preventing compression of the first chain 24 and thus avoiding jamming.

[0050] Furthermore, the gripper 32 includes a support rod 321 and a clamping rod 322. One end of the support rod 321 is connected to the telescopic sleeve rod 31, and the other end of the support rod 321 is detachably connected to the clamping rod 322.

[0051] Specifically, the support rod 321 and the clamping rod 322 are connected by a threaded detachable connection. In actual operation, the corresponding clamping rod 322 (of different materials) can be selected according to the quality of the product being clamped.

[0052] Furthermore, a clamping block 323 is provided at the end of the clamping rod 322 away from the support rod 321, and the clamping block 323 is detachably connected to the clamping rod 322.

[0053] Specifically, in actual operation, one end of the clamping rod 322 equipped with the clamping block 323 directly contacts both ends of the product. Depending on the product being clamped, different materials of the clamping block 323 are used. As a preferred embodiment of this invention, the clamping block 323 can be made of materials such as rubber, silicone, or tendon. Utilizing its deformation properties, it can increase the contact area with the product, increasing friction and adhesion, thus ensuring the stability of the product clamping. Secondly, since the temperature inside the heating furnace 4 is between 110℃ and 180℃, prolonged use can cause the clamping block 323 to fail. The detachable connection also facilitates the replacement of the clamping block 323.

[0054] A packaging machine includes the automatic suspended heat shrink device for shrink film with two ends as described in the above embodiments.

[0055] In summary, this utility model introduces an automatic suspended heat shrink wrapping device and packaging machine for double-ended shrink film. In this utility model, the loading rack 1 is used to transport the product to be packaged, conveying the product to the bottom of the conveyor frame 21. Utilizing the special structure of the limiting guide rail 22, the gripping component 3 is activated, clamping both ends of the product on the loading rack 1, suspending the entire product in the air. The product then enters the heating furnace 4 along the conveyor frame 21 for heat shrink wrapping. This utility model suspends the surface of the product requiring heat shrink wrapping, ensuring uniform stress on the heat shrink film upon entering the heating furnace 4, preventing wrinkles on the product surface and improving product quality.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An automatic suspended heat shrink device for a shrink film with open ends, characterized in that, include: Material feeding rack; A conveying assembly includes a conveying frame and a pair of limiting guide rails. The input end of the conveying frame is located above the output end of the loading frame. The pair of limiting guide rails are symmetrically arranged on the top of the conveying frame along its length. Each limiting guide rail includes a clamping section, a heating section, and a releasing section. The distance between the heating sections of the two limiting guide rails is smaller than the distance between the clamping and releasing sections. The output end of the loading frame is located at the bottom of the conveying frame near the clamping section. The conveying frame has multiple first sprockets arranged along its length axis, and the multiple first sprockets are connected by a first chain. At least one set of gripping components, the gripping components including a telescopic sleeve and a pair of grippers, the two ends of the telescopic sleeve are slidably connected to the limiting guide rail, one side of the telescopic sleeve is connected to the first chain, and the pair of grippers are symmetrically arranged on the side of the telescopic sleeve away from the first chain; A heating furnace is disposed at the bottom of the conveyor frame and at the bottom of the heating section of the limiting guide rail.

2. The automatic suspended heat shrink device for double-ended shrink film according to claim 1, characterized in that: The feeding rack is equipped with a drive roller, the outside of which is covered by a conveyor belt, and a second sprocket is provided at one end of the drive roller.

3. The automatic suspended heat shrink device for double-ended shrink film according to claim 2, characterized in that: The conveying assembly further includes a drive shaft, the first sprocket is sleeved on the drive shaft, a third sprocket is provided at one end of the drive shaft, and a second chain is provided between the third sprocket and the second sprocket.

4. The automatic suspended heat shrink device for double-ended shrink film according to claim 1, characterized in that: The gripping component also includes rollers, which are disposed at both ends of the telescopic sleeve and embedded inside the limiting guide rail.

5. The automatic suspended heat shrink device for double-ended shrink film according to claim 4, characterized in that: A limiting slot is provided on one side of the limiting guide rail, and the size of the limiting slot is smaller than the diameter of the roller.

6. The automatic suspended heat shrink device for double-ended shrink film according to claim 1, characterized in that: The telescopic sleeve includes a first rod and a second rod, with one end of the first rod sleeved on the outside of the second rod, and a pair of grippers connected to the first rod and the second rod respectively.

7. The automatic suspended heat shrink device for double-ended shrink film according to claim 1, characterized in that: A connecting block is provided between the telescopic sleeve and the first chain. The surface of the connecting block is provided with a sliding groove, which is arranged along the axial direction of the telescopic sleeve. The surface of the telescopic sleeve is provided with a slider that cooperates with the sliding groove.

8. The automatic suspended heat shrink device for double-ended shrink film according to claim 1, characterized in that: The gripper includes a support rod and a clamping rod. One end of the support rod is connected to a telescopic sleeve rod, and the other end of the support rod is detachably connected to the clamping rod.

9. The automatic suspended heat shrink device for double-ended shrink film according to claim 8, characterized in that: A clamping block is provided at the end of the clamping rod away from the support rod, and the clamping block is detachably connected to the clamping rod.

10. A packaging machine, characterized in that, Includes the automatic suspended heat shrink device for shrink film with two ends as described in any one of claims 1-9.

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