Base material pipe for winding thin film
By setting a foam buffer layer and inclined seams on the paper tube, combined with the stress groove and multi-layer buffer layer structure of the bottom tube, the problem of uneven stress during film winding is solved, the winding quality is improved and the production cost is reduced.
Patent Information
- Application Number
- CN202423114286.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The existing paper tubes are prone to uneven stress during film winding, resulting in poor winding quality, and the injection-molded outer tubes are costly and energy-intensive.
The design incorporates a foam cushioning layer and sloping seams, combined with the stress grooves and multi-layer cushioning structure of the base tube. These are then bonded together with adhesive to form a compact base tube, ensuring uniform stress distribution.
This method achieves uniform stress distribution during film winding, avoids deformation, improves winding success rate, and reduces production costs and energy consumption.
Smart Images
Figure CN223720345U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of foam paper tube, especially a base material tube for film winding. BACKGROUND
[0002] The film material usually adopts the paper tube as the winding base material, and the various parameter properties of the paper tube directly affect the forming and coiling quality when the film material is wound.
[0003] In the prior art, in order to improve the winding quality, the outer surface of the paper tube is usually sleeved with an injection molded outer tube. However, the injection molded outer tube is prone to have pores, sand holes and uneven surface, thereby causing the stress borne by the paper tube to be uneven when the paper tube is wound, resulting in the problem of poor winding of the coiled material, which can only meet some low requirement working conditions. In addition, the production cost of the injection molded part is high, and the energy consumption is high. UTILITY MODEL CONTENT
[0004] Therefore, it is necessary to provide a base material tube for film winding in view of the problem that the paper tube is prone to have uneven stress in the film winding process, thereby affecting the winding quality.
[0005] The technical scheme adopted by the utility model is as follows:
[0006] A base material tube for film winding comprises:
[0007] A bottom tube is in a cylindrical shape.
[0008] A first buffer layer is made of foam material, and first and second bevels are arranged at two ends of the first buffer layer.
[0009] The first buffer layer is adhered to the bottom tube by adhesive, so that the first buffer layer wraps the outer circumferential surface of the bottom tube. When the first buffer layer is adhered to the bottom tube, the first bevel is butted against the second bevel, so that an inclined first joint is formed on the first buffer layer.
[0010] As a further improvement of the above technical scheme:
[0011] The inclination angle of the first joint is 5°-15°.
[0012] The bottom tube is a paper tube or a plastic tube.
[0013] The bottom tube is a hollow tube.
[0014] A stress groove is arranged on the outer circumferential surface of the bottom tube.
[0015] The stress groove is in a spiral shape.
[0016] The first buffer layer is polished by an outer circle grinding machine.
[0017] The thickness of the first buffer layer is 1.5mm-5mm.
[0018] The second buffer layer is further included, and the second buffer layer is sequentially stacked and wound along the radial direction of the bottom tube from inside to outside.
[0019] The second seams on the second buffer layer adjacent to the first buffer layer are staggered between the first seams and between the second seams on the adjacent two layers of the second buffer layer.
[0020] The beneficial effects of the present application are as follows:
[0021] The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate.
[0023] Figure 2 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate. Figure 1 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate.
[0024] Figure 3 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate. Figure 1 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate.
[0025] Figure 4 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate. Figure 2 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate.
[0026] Figure 5 The present application has the advantages of compact and reasonable structure, convenient operation, uniform stress on the bottom tube during film winding by the setting of the buffer layer of foam material, avoiding deformation of the bottom tube during winding, improving winding quality, using the inclined first seam to improve the stress bearing capacity of the seam, avoiding collapse of the first buffer layer at the seam, reducing film deformation during winding, improving winding quality, greatly improving the winding rate of the film material, and reducing the scrap rate.
[0027] 1, first buffer layer; 2, second buffer layer; 3, bottom tube; 4, stress groove; 5, first seam; 6, second seam. DETAILED DESCRIPTION
[0028] The specific embodiments of the present application will be described below in conjunction with the drawings.
[0029] The structure and function of the present application are as follows:
[0030] For example, Figures 1-5As shown, a base material pipe for film winding includes: a bottom pipe 3 in a cylindrical shape; a first buffer layer 1 made of foam material, and provided with a first bevel and a second bevel at two ends respectively; and the first buffer layer 1 is adhered to the bottom pipe 3 by adhesive, so that the first buffer layer 1 wraps the outer circumferential surface of the bottom pipe 3, and when the first buffer layer 1 is adhered to the bottom pipe 3, the first bevel and the second bevel are butted to form an inclined first joint 5 on the first buffer layer 1. By setting the buffer layer made of foam material, the stress on the bottom pipe 3 can be uniformly distributed during film winding, and deformation of the bottom pipe 3 during winding can be avoided, and winding quality can be improved; at the same time, by using the inclined first joint 5, the stress bearing capacity of the joint can be improved, so as to avoid the problem of collapse of the first buffer layer 1 at the joint, reduce the film deformation problem during winding, and improve the winding quality.
[0031] The inclination angle of the first joint 5 is 5°-15°, by setting the first bevel and the second bevel, the first joint 5 which is not perpendicular to the end surface of the bottom pipe 3 is formed after the first buffer layer 1 is spliced; at the same time, by setting the inclination angle of the first joint 5 to be 5°-15°, within this angle range, the first joint 5 is almost invisible from the top view, and the appearance is flat; in addition, when winding the film, the stress direction at the splicing joint is changed, so as to avoid the collapse of the base material pipe at the splicing joint, and effectively improve the winding quality.
[0032] The bottom pipe 3 is made of a paper tube or a plastic tube, and the paper tube and the plastic tube are convenient to manufacture and have low manufacturing cost, good durability and applicability.
[0033] The bottom pipe 3 is a hollow pipe, which can effectively reduce the weight of the base material pipe and save cost.
[0034] The outer circumferential surface of the bottom pipe 3 is provided with a stress groove 4, and the stress groove 4 is in a spiral shape. By setting the stress groove 4, the uniformity of the stress on the bottom pipe 3 can be further improved, and the winding quality can be improved; in addition, in order to further improve the adhesion stability between the first buffer layer 1 and the bottom pipe 3, adhesive can be filled in the stress groove 4 between the bottom pipe 3 and the first buffer layer 1.
[0035] The first buffer layer 1 is polished by an outer circle grinding machine, which can correct the roundness and flatness of the outer circle of the first buffer layer 1, so as to ensure the machining precision of the roundness and flatness of the outer circle of the first buffer layer 1, and further reduce the deformation and winding density unevenness of the base material pipe which may occur during film winding.
[0036] The thickness of the first buffer layer 1 is 1.5mm-5mm, within this thickness range, the first buffer layer 1 has good buffering capacity and can effectively distribute stress uniformly.
[0037] The first buffer layer 1 is adhered to the outer circumferential surface of the bottom pipe 3 by adhesive, specifically, the adhesive is uniformly coated on the inner surface of the cut first buffer layer 1, and then the first buffer layer 1 coated with the adhesive is adhered to the outer lateral wall surface of the bottom pipe 3; by using the adhesive, the composite strength between the first buffer layer 1 and the bottom pipe 3 can be enhanced, and the displacement problem in the winding process can be avoided.
[0038] As shown in Figure 5 The second buffer layer 2 is wrapped outside the first buffer layer 1, and a plurality of layers can be arranged, and the first buffer layer 1 and the second buffer layer 2 and the second buffer layer 2 and the second buffer layer 2 are adhered by an adhesive; in the working condition that the film winding thickness is large and the film material hardness is high, the winding quality can be ensured by adding the second buffer layer 2.
[0039] The second joint 6 on the second buffer layer 2 adjacent to the first buffer layer 1 is arranged in a staggered manner between the first joint 5 and the second joint 6 on the second buffer layer 2 adjacent to the first buffer layer 1, and between the second joints 6 on the adjacent two second buffer layers 2, so as to avoid the collapse problem caused by the joint coincidence.
[0040] The second buffer layer 2 can adopt the same foam material as the first buffer layer 1, and preferably EVA foam.
[0041] The working process of the utility model is as follows:
[0042] A certain length of foam (the length is equal to the circumference of the bottom pipe 3) is cut, and first and second chamfered surfaces are machined at both ends of the cut foam, so as to prepare the first buffer layer 1;
[0043] The adhesive is coated on one end surface of the first buffer layer 1, and then the surface coated with the adhesive is attached to the bottom pipe 3, so as to adhere the first buffer layer 1 to the bottom pipe 3; at the same time, the first chamfered surface and the second chamfered surface are butted to form the first joint 5, and the preparation of the base pipe is completed;
[0044] The film is wound on the base pipe by the film winding machine, the first buffer layer 1 can play a good buffering role, and the stress is uniform in the film winding process, so as to effectively ensure the winding quality.
[0045] The above description is an explanation of the utility model, not a limitation of the utility model, the scope defined by the utility model is referred to the claims, and any form of modification can be made within the protection scope of the utility model.
Claims
1. A base tube for film winding, characterized by: Include: Bottom pipe (3), cylindrical; First buffer layer (1) is made of foam material, both ends are provided with first bevel and second bevel respectively; The first buffer layer (1) is bonded with the bottom pipe (3) by adhesive, so that the first buffer layer (1) wraps the outer circumferential surface of the bottom pipe (3), and the first bevel and the second bevel are butted when the first buffer layer (1) is bonded with the bottom pipe (3), so that the first buffer layer (1) forms an inclined first joint (5) on the first buffer layer (1).
2. A base tube for film winding as claimed in claim 1, characterized in that: The inclination angle of the first joint (5) is 5°-15°.
3. A base tube for film winding as defined in claim 1, characterized in that: The bottom pipe (3) is made of paper tube or plastic tube.
4. A base tube for film winding as defined in claim 1, characterized in that: The bottom pipe (3) is a hollow pipe.
5. A base tube for film winding as defined in claim 1, characterized in that: The outer circumferential surface of the bottom pipe (3) is provided with stress groove (4).
6. A base tube for film winding as claimed in claim 5, characterized in that: The stress groove (4) is spiral.
7. A base tube for film winding as defined in claim 1, characterized in that: The first buffer layer (1) is polished by outer circle grinding machine.
8. A base tube for film winding as defined in claim 1, characterized in that: The thickness of the first buffer layer (1) is 1.5mm-5mm.
9. A base tube for film winding as defined in claim 1, characterized in that: It also includes at least one second buffer layer (2), the second buffer layer (2) is stacked and wound along the radial direction of the bottom pipe (3) from inside to outside, the single layer second buffer layer (2) is wound into a cylindrical shape, so that the inclined second joint (6) is formed on the end face.
10. A base material tube for film winding as defined in claim 9, wherein: The second joint (6) on the second buffer layer (2) adjacent to the first buffer layer (1) and the first joint (5) and the second joint (6) on the second buffer layer (2) of adjacent two layers are arranged in staggered manner.