Membrane compounding mechanism

Abstract

The invention relates to the technical field of film compositing, in particular to a film compositing mechanism which comprises a base material guide roller and a compositing guide roller and further comprises a pressure device, the pressure device comprises at least one pressure unit, and the pressure unit is arranged corresponding to the film deformation position of the compositing position of a base material and a film and used for being matched with the compositing guide roller to apply pressure to the film deformation position. According to the film compounding mechanism provided by the invention, the film deformation part is flattened in the film compounding process through the pressure unit which can be matched with the compounding guide roller to apply pressure to the film deformation part, so that the product yield is improved, and the product cannot be curled.

Description

Technical Field

[0001] The present disclosure relates to the field of membrane composite technology, and in particular to a membrane composite mechanism. Background Art

[0002] Thermal paper is a special consumable for digital all-in-one quick printing machines. The production technology of thermal paper mainly includes the preparation process of adhesive, the composite process of substrate and film, the coating and drying process, and the slitting process.

[0003] At present, the lamination process of thermal paper production adopts the technology of wet natural lamination on passive guide rollers. Figure 1 The substrate 1 and the adhesive film 2 are pulled by traction and are naturally overlapped and bonded together on a passively rotating composite guide roller 3 without being affected by other external pressure.

[0004] Since the adhesive film 2 is a very thin PET film, generally only about 1.5 microns thick, it is very difficult to achieve a very smooth flat quality. It is inevitable that some positions will be loose or tight. These deformed positions of the adhesive film 2 may produce wrinkles after compounding.

[0005] In order to solve the above-mentioned wrinkle problem in the current thermal paper composite technology, the method of increasing or decreasing the tension of the coating film 2 is generally adopted. This method is effective for some relatively minor deformations, but for slightly more serious deformations, wrinkles cannot be avoided, so the yield rate cannot be guaranteed. In addition, the method of increasing the tension of the composite film may also cause curling of the thermal paper. Summary of the invention

[0006] In order to solve the above problems, the present disclosure provides a film composite structure.

[0007] Specifically, the technical solution of the present disclosure is:

[0008] A film composite mechanism includes a substrate guide roller and a composite guide roller, and also includes a pressure device, the pressure device includes at least one pressure unit, the pressure unit is arranged corresponding to the film deformation where the substrate and the film are composited, and the pressure unit is used to cooperate with the composite guide roller to apply pressure to the film deformation.

[0009] In one embodiment, the pressure unit comprises a pressure head, which is used to directly press against the surface of the deformed portion of the membrane to flatten the deformed portion of the membrane during compounding.

[0010] In one embodiment, the pressure head is a metal pressure roller, and the axial direction of the pressure head is arranged parallel to the axial direction of the composite guide roller.

[0011] In one embodiment, the pressure device also includes a support, and the pressure unit also includes a connecting rod, one end of the connecting rod is rotatably connected to the pressure head so that the pressure head can rotate around the pressure head axis, and the other end of the connecting rod can be connected to the support axially movably along the composite guide roller.

[0012] In one embodiment, the support is grounded, and the pressure head, the connecting rod and the support constitute a grounding path for electric charges to pass through.

[0013] In one embodiment, the pressing head is a cloth ball.

[0014] In one embodiment, the pressure head is a pressure roller made of a mixture of plastic and antistatic material, and the axial direction of the pressure head is arranged parallel to the axial direction of the composite guide roller.

[0015] Beneficial technical effects of the present disclosure:

[0016] The film composite mechanism provided by the present disclosure realizes flattening of the deformed parts of the film during the film composite process through a pressure unit that can cooperate with the composite guide roller to apply pressure to the deformed parts of the film, thereby improving the product yield and preventing the product from curling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an existing membrane composite mechanism;

[0018] Figure 2 This is a schematic structural diagram of a membrane composite mechanism according to an embodiment of the present disclosure;

[0019] Figure 3 for Figure 1 A side schematic diagram of the membrane composite structure shown. DETAILED DESCRIPTION

[0020] The present disclosure is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following specific embodiments involve the composite technology of thermal paper, that is, the composite of the thermal paper substrate 1 and the adhesive film 2. In other embodiments, the film composite mechanism of the present disclosure can also be used to realize the composite of the substrate and the film of other products.

[0021] In a specific embodiment, if Figure 2 and 3As shown, the film composite mechanism provided by the present disclosure includes a substrate guide roller 4 and a composite guide roller 3. In addition, compared with the existing film composite mechanism, the present disclosure adds a pressure device, and the pressure device includes at least one pressure unit 5. The pressure unit 5 is arranged at the film deformation location where the substrate 1 and the adhesive film 2 are composited. The pressure unit 5 is used to cooperate with the composite guide roller 3 to apply pressure to the film deformation location, thereby causing the tension at the film deformation location to change and flatten. The size of the pressure unit 5 is designed to adapt to the product size. The product width of the thermal paper is mostly between 800cm and 1000cm. The width of the pressure unit 5 is preferably set between 15cm and 25cm. Three to four pressure units 5 can be prepared to cope with the situation where the film has multiple deformations. During the composite process, the number of pressure units 5 is increased or decreased according to the number of film deformation locations.

[0022] Figure 2 The state in which two pressure units 5 are set is shown. Figure 2 The pressure unit 5 includes a pressure head 51, which is used to directly press against the surface of the deformed part of the film to flatten the deformed part of the film during compounding. The material and structure of the pressure head 51 can be selected in many ways, for example, the material can be plastic, metal or cloth, and the structure can be cylindrical or ball-shaped, which can be selected according to the product conditions.

[0023] In this embodiment, the pressure head 51 is a metal pressure roller, which has relatively little friction with the adhesive film 2, and the static electricity generated by the friction is also easy to be discharged and processed. The axial direction of the pressure head 51 is parallel to the axial direction of the composite guide roller 3. The pressure device also includes a support 6, and the pressure unit 5 also includes a connecting rod 52. One end of the connecting rod 52 is rotatably connected to the pressure head 51, so that the pressure head 51 can rotate around the axis of the pressure head 51, and the other end of the connecting rod 52 can be connected to the support 6 along the axial direction of the composite guide roller 3. The support 6 is grounded, and the pressure head 51, the connecting rod 52 and the support 6 constitute a grounding path for electric charges to pass through. The static electricity generated by the friction between the pressure head 51 and the adhesive film 2 can be discharged from the grounding path to prevent the accumulation of static electricity from causing safety hazards. The specific structure of the rotational connection between the pressure head 51 and the connecting rod 52 can be as follows Figure 2 As shown, other structural forms may also be used, for example, the pressure head 51 may be connected to the connecting rod 52 at only one end. The structure of the support 6 may be as follows Figure 2 The structure shown includes a rod portion, and the connecting rod 52 is sleeved on the rod portion. By properly setting the tightness between the connecting rod 52 and the rod portion, the connecting rod 52 can be prevented from moving along the axial direction of the rod portion without being subjected to additional external forces. In addition, by properly setting the matching structure between the connecting rod 52 and the rod portion, the connecting rod 52 can be prevented from circumferential displacement relative to the rod portion. For example, the rod portion can be designed to have an axial limiting convex strip, and a corresponding limiting groove is provided on the connecting rod 52. For another example, the connecting rod 52 can be locked on the support 6 by a fastener, and the connecting rod 52 can move relative to the support 6 only after the locking is released.

[0024] Figure 2 The structure shown is only one of many pressure device structures, which are difficult to list here. The main feature of the pressure device is that it includes at least one pressure unit 5 for applying pressure to the deformed part of the membrane. The structure of the pressure unit 5 is not limited to the types mentioned in the present disclosure. The main feature of the pressure unit 5 is that it includes a pressure head 51, which should have the function of flattening the deformed part of the membrane, and should not have any sharp parts that may scratch the product.

[0025] In other embodiments, the pressure head 51 can also be a cloth ball or a pressure roller made of a mixture of plastic and antistatic material. When the pressure head 51 is a tightly bundled cloth ball, it has a very good effect on reducing or avoiding the composite wrinkles of the thermal paper. However, due to the large surface friction between the cloth ball and the thermal paper, if the reinforcement of the substrate is insufficient, it may cause the thermal paper to fluff, and it will also increase the residual paper fiber and scale, which requires the maintenance frequency of the integrated quick printing machine to be increased. When the pressure head 51 is an ordinary plastic pressure roller, it can achieve the effect of reducing or avoiding the composite wrinkles of the thermal paper. However, when the pressure roller is pressed on the composite guide roller and driven by the thermal paper to rotate together, it is easy to generate more static electricity and affect safety. Therefore, a certain amount of antistatic material needs to be added to the material of the pressure roller to reduce the generation of static electricity.

[0026] When the pressure head 51 is a metal pressure roller, the generation of static electricity can be greatly reduced by simply grounding the pressure head 51 using some means. The surface of the metal pressure roller is smooth and will not increase the fuzz on the surface of the thermal paper, which can achieve a good effect of reducing or avoiding the composite wrinkles of the thermal paper.

[0027] Figure 2 and 3 The thin arrow and thick arrow in the figure respectively indicate the rotation direction of the guide roller and the opposite direction of the product conveying. The pressure head 51 is driven to rotate by the friction between it and the product. A plurality of pressure units 5 are installed above the composite part of the substrate and the film for standby use. When the film is flat and not deformed, they are not used. When the film is deformed, the pressure unit 5 is immediately moved to the corresponding position to press it, which can reduce and avoid the composite wrinkles at these positions, thereby improving the yield rate. The present disclosure specifically and locally processes the deformed part of the film, which can well avoid the problem of product curling caused by excessive film tension in the aforementioned prior art.

[0028] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. It should be noted that any modification, equivalent replacement, improvement, etc. made by a person skilled in the art within the spirit and principle of the present disclosure after reading this specification should be included in the protection scope of the present disclosure.

Claims

1. A film laminating mechanism, comprising a substrate guide roller and a laminating guide roller, characterized in that: It also includes a pressure device, which includes at least one pressure unit. The pressure unit is set corresponding to the film deformation where the substrate and the film are combined. The pressure unit is used to cooperate with the composite guide roller to apply pressure to the film deformation.

2. The membrane composite structure according to claim 1, characterized in that: The pressure unit comprises a pressure head, which is used to directly press against the surface of the deformed part of the membrane to flatten the deformed part of the membrane during compounding.

3. The membrane composite structure according to claim 2, characterized in that: The pressure head is a metal pressure roller, and the axial direction of the pressure head is arranged parallel to the axial direction of the composite guide roller.

4. The membrane composite structure according to claim 2, characterized in that: The pressure device also includes a support, and the pressure unit also includes a connecting rod, one end of the connecting rod is rotatably connected to the pressure head so that the pressure head can rotate around the pressure head axis, and the other end of the connecting rod is movably connected to the support along the axial direction of the composite guide roller.

5. The membrane composite structure according to claim 4, characterized in that: The support is grounded, and the pressure head, the connecting rod and the support form a grounding path for electric charges to pass through.

6. The membrane composite structure according to claim 2, characterized in that: The pressing head is a cloth ball.

7. The membrane composite structure according to claim 2, characterized in that: The pressure head is a pressure roller made of a mixture of plastic and antistatic material, and the axial direction of the pressure head is arranged parallel to the axial direction of the composite guide roller.

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