Rubber coating compression roller and film pasting compression roller device

Abstract

The utility model discloses a rubber coating compression roller and film pasting compression roller device, the rubber coating compression roller comprises a compression roller in the center and a rubber sleeve wrapping the compression roller, the outer diameter of the middle part of the rubber coating compression roller is larger than that of the two ends of the rubber coating compression roller, and transition sections with gradually reduced outer diameters are formed between the middle part and the two ends of the rubber coating compression roller. According to the utility model, the rubber coating compression roller is designed into a shape with a convex middle part and two flat ends, so that a dry film can be pressed, attached and filled into a concave part in the middle of a plate surface, and the quality problems of bubbles and the like at the concave part after film pasting are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of PCB board film application equipment, specifically relating to a coating roller and a film application roller device. Background Technology

[0002] In the process of printing circuit board pattern making, before the exposure image is transferred, the photosensitive dry film needs to be attached to the PCB board surface. During the film attachment, the photosensitive dry film is mainly pressed onto the PCB board surface by the coating roller. The diameter of the coating roller is 100mm, that is, the axial diameter of the coating roller is the same for all 100mm, and the length of the coating roller is 810mm. The coating roller is usually composed of a central iron core and an outer coating. The diameter of the iron core is 94mm, and a 3mm thick layer of acid and alkali resistant rubber is wrapped around the iron core. The rubber has a hardness of 68 degrees (Shore hardness).

[0003] When applying the film, PCBs with a thickness of ≥6mm have a PP adhesive flow in the absence of copper in the middle, resulting in a depression depth of 0.3mm. When the adhesive roller applies the dry film to the depression on the board surface, because the outer diameter of the adhesive roller is the same at the front and back, that is, its contact surface with the board surface is horizontal, the dry film cannot be pressed into the depression. This leads to quality problems such as air bubbles in the depression after film application, which in turn affects the subsequent PCB manufacturing and production quality. Utility Model Content

[0004] The purpose of this utility model is to overcome the existing technical defects and provide a coating roller and film-applying roller device. By designing the coating roller into a shape with a raised middle and flat ends, it can press and fill the dry film into the depression in the middle of the board surface, thereby solving the quality problems such as air bubbles that appear in the depression after film application.

[0005] In the first aspect, in order to solve the above-mentioned technical problems, the present invention provides a rubber-coated pressure roller, including a central pressure roller and a rubber sleeve covering the outer periphery of the pressure roller. The outer diameter of the middle part of the rubber-coated pressure roller is larger than the outer diameter of its two ends, and a transition section with a gradually decreasing outer diameter is formed between the middle part and the two ends of the rubber-coated pressure roller.

[0006] Furthermore, the rubber-coated pressure roller has a first straight section with an outer diameter of 100mm in the middle; both ends of the rubber-coated pressure roller have a second straight section with an outer diameter of 98mm, and a transition section with a gradually decreasing outer diameter is formed between the first straight section and the second straight sections at both ends.

[0007] Furthermore, the outer diameter of the pressure roller at the first straight section is 95mm, the outer diameter of the pressure roller at the second straight section is 92mm, and the outer diameter of the pressure roller at the transition section gradually decreases from 95mm on the inner side to 92mm on the outer side.

[0008] Furthermore, the thickness of the rubber sleeve at the first straight section is 2.5mm, and the thickness of the rubber sleeve at the second straight section is 3mm; the thickness of the rubber sleeve at the transition section gradually increases from 2.5mm on the inner side to 3mm on the outer side.

[0009] Furthermore, the pressure roller is a cylinder with a uniform outer diameter, and the outer diameter of the pressure roller is 92mm.

[0010] Furthermore, the thickness of the rubber sleeve at the first straight section is 4mm, and the thickness of the rubber sleeve at the second straight section is 3mm; the thickness of the rubber sleeve at the transition section gradually decreases from 4mm on the inside to 3mm on the outside.

[0011] Furthermore, the length of the first straight segment is 20mm, and the length of the second straight segment is 50mm.

[0012] Furthermore, the rubber sleeve is made of rubber with a hardness of 55 degrees.

[0013] Secondly, this utility model also provides a film-applying roller device, including two parallel first and second film-applying rollers arranged vertically. Both the first and second film-applying rollers are film-applying rollers as described in any one of the first aspects, and a gap is formed between the first and second film-applying rollers for the PCB board to pass through.

[0014] Furthermore, the upper end of the first rubber-coated pressure roller is provided with an adjacent first steel roller and a first cylinder for driving the first steel roller to move up and down, and the lower end of the second rubber-coated pressure roller is provided with an adjacent second steel roller and a second cylinder for driving the second steel roller to move up and down.

[0015] This utility model has the following beneficial effects:

[0016] In this invention, by designing the coating roller to have a raised center and flat ends, it can press and fill the dry film into the depression in the middle of the board surface, thereby solving quality problems such as air bubbles that appear in the depression after film application.

[0017] Secondly, the rubber sleeve uses a hardness of 55 degrees, which is softer and has better elastic deformation performance than the existing medium hardness of 68 degrees. When applying the film, the deformation performance of the rubber sleeve can be better utilized to match the shape of the coating roller, so as to more easily and better attach the dry film to the recess in the middle of the PCB board.

[0018] The film-applying roller device provided in this utility model adds a steel roller that can apply pressure to the outside of the coating roller, so that the coating roller and the rubber sleeve on the coating roller undergo slight elastic deformation towards the gap between them after being pressed, thereby making it easier for the dry film to adhere to the recess in the middle of the PCB board.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of the rubber-coated pressure roller in Example 1;

[0022] Figure 2 This is a front view of the rubber-coated pressure roller in Example 1;

[0023] Figure 3 This is a cross-sectional view of the rubber-coated pressure roller in Example 1;

[0024] Figure 4 This is a schematic diagram of the rubber-coated pressure roller in Example 2;

[0025] Figure 5 This is a front view of the rubber-coated pressure roller in Example 2;

[0026] Figure 6 This is a cross-sectional view of the rubber-coated pressure roller in Example 2;

[0027] Figure 7 This is a schematic diagram of the film-applying roller device in Example 3. Detailed Implementation

[0028] To better understand the technical content of this utility model, the following will further introduce and explain this utility model in conjunction with the accompanying drawings and specific embodiments. It should be noted that if there are descriptions such as "first" and "second" in the text, they are used to distinguish different components, etc., and do not represent the order of priority, nor do they limit "first" and "second" to be different types.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] like Figures 1 to 3As shown in the figure, the rubber-coated pressure roller 100 of this embodiment includes a central pressure roller 1 and a rubber sleeve 2 covering the outer periphery of the pressure roller 1. The outer diameter of the middle part of the rubber-coated pressure roller is larger than the outer diameter of its two ends, and a transition section with a gradually decreasing outer diameter is formed between the middle part and the two ends of the rubber-coated pressure roller. Through the above structure, the rubber-coated pressure roller is designed with a shape that is raised in the middle and flat at both ends. The structure of the raised middle part allows it to press and fill the dry film into the depression in the middle of the board surface, thereby solving quality problems such as air bubbles that appear in the depression after film application.

[0032] In one embodiment, the rubber-coated pressure roller has a first straight section 10 with an outer diameter of 100 mm in the middle; both ends of the rubber-coated pressure roller have a second straight section 20 with an outer diameter of 98 mm, and a transition section 30 with a gradually decreasing outer diameter is formed between the two ends of the first straight section 10 and the two ends of the second straight section 20.

[0033] In one embodiment, the outer diameter of the pressure roller 1 at the first straight section 10 is 95mm, the outer diameter of the pressure roller 1 at the second straight section 20 is 92mm, and the outer diameter of the pressure roller 1 at the transition section 30 gradually decreases from 95mm on the inner side to 92mm on the outer side, thereby using the transition section to connect the inner and outer first straight sections and the second straight section, and using the central pressure roller 1 to form a structure with a central protrusion and straight ends.

[0034] In one embodiment, the thickness of the sleeve 2 at the first straight section 10 is 2.5 mm, and the thickness of the sleeve 2 at the second straight section 20 is 3 mm; the thickness of the sleeve 2 at the transition section 30 gradually increases from 2.5 mm on the inner side to 3 mm on the outer side, so that the sleeve forms a structure that is thinner on the inside and thicker on the outside. In terms of the elasticity of the sleeve, the thinner it is, the easier it is to deform, so that the sleeve at the middle protrusion is more elastically deformable than the sleeves at both ends. This further allows the middle protrusion structure to press and fill the dry film into the depression in the middle of the board surface, and the thickness of the outer sleeve also avoids the problem of poor film application at both ends due to the large difference in the outer diameter of the inner and outer coating rollers.

[0035] In one embodiment, the rubber-coated pressure roller is arranged symmetrically from left to right with its middle section as the boundary, that is, the lengths of the second straight sections at both ends of the rubber-coated pressure roller are the same, and the lengths of the transition sections are also the same.

[0036] In one embodiment, the overall axial length of the rubber-coated pressure roller is 810 mm, the axial length of the first straight section 10 is 20 mm, the axial length of the second straight section 20 is 50 mm, and the axial length of the transition section is 345 mm.

[0037] In other embodiments, the pressure roller is an iron core.

[0038] In other embodiments, the sleeve is made of rubber with a hardness (i.e., Shore hardness) of 55.

[0039] Example 2

[0040] like Figures 4 to 6 As shown in the figure, the rubber-coated pressure roller 100 of this embodiment includes a central pressure roller 1 and a rubber sleeve 2 covering the outer periphery of the pressure roller 1. The outer diameter of the middle part of the rubber-coated pressure roller is larger than the outer diameter of its two ends, and a transition section with a gradually decreasing outer diameter is formed between the middle part and the two ends of the rubber-coated pressure roller. Through the above structure, the rubber-coated pressure roller is designed with a shape that is raised in the middle and flat at both ends. The structure of the raised middle part allows it to press and fill the dry film into the depression in the middle of the board surface, thereby solving quality problems such as air bubbles that appear in the depression after film application.

[0041] In one embodiment, the rubber-coated pressure roller has a first straight section 10 with an outer diameter of 100 mm in the middle; both ends of the rubber-coated pressure roller have a second straight section 20 with an outer diameter of 98 mm, and a transition section 30 with a gradually decreasing outer diameter is formed between the two ends of the first straight section 10 and the two ends of the second straight section 20.

[0042] In one embodiment, the central pressure roller 1 is a cylinder with a uniform outer diameter, and the outer diameter of the pressure roller 1 is 92mm. That is, the thickness of the rubber sleeve 2 at the first straight section 10 is 4mm, and the thickness of the rubber sleeve 2 at the second straight section 20 is 3mm. The thickness of the rubber sleeve 2 at the transition section gradually decreases from 4mm on the inner side to 3mm on the outer side, thereby using the outer rubber sleeve 2 to form a structure with a raised middle and straight ends.

[0043] In one embodiment, the rubber-coated pressure roller is arranged symmetrically from left to right with its middle section as the boundary, that is, the lengths of the second straight sections at both ends of the rubber-coated pressure roller are the same, and the lengths of the transition sections are also the same.

[0044] In one embodiment, the overall axial length of the rubber-coated pressure roller is 810 mm, the axial length of the first straight section 10 is 20 mm, the axial length of the second straight section 20 is 50 mm, and the axial length of the transition section is 345 mm.

[0045] In other embodiments, the pressure roller is an iron core.

[0046] In other embodiments, the sleeve is made of rubber with a hardness (i.e., Shore hardness) of 55.

[0047] Example 3

[0048] like Figure 7 As shown, this utility model also provides a film-coating roller device, including two parallel first coating rollers 101 and second coating rollers 102. Both the first coating rollers 101 and the second coating rollers 102 are coating rollers as described in Embodiment 1 or Embodiment 2, and a gap 103 is formed between the first coating rollers 101 and the second coating rollers 102 for the PCB board to pass through.

[0049] In one embodiment, the upper end of the first coating roller 101 is provided with an adjacent first steel roller 104 and a first cylinder 105 for driving the first steel roller 104 to move up and down. That is, the piston rod of the first cylinder 105 is connected to the middle of the first steel roller 104. The lower end of the second coating roller 102 is provided with an adjacent second steel roller 106 and a second cylinder 107 for driving the second steel roller 106 to move up and down. That is, the piston rod of the second cylinder 107 is connected to the middle of the second steel roller 106. In this way, the cylinder can be used to apply pressure to the two steel rollers. The two steel rollers are in close contact with the coating roller, and the force is transmitted to the two coating rollers. This causes the coating roller and the rubber sleeve on the coating roller to undergo slight elastic deformation towards the gap between them after being pressed, thereby making it easier for the dry film to adhere to the recess in the middle of the PCB board.

[0050] In other embodiments, the first steel roller 104 and the second steel roller 106 both have an axial length of 900 mm and an outer diameter of 150 mm, so that the first steel roller 104 and the second steel roller 106 can cover the entire rubber-coated pressure roller in the axial direction.

[0051] In other embodiments, both the first steel roller 104 and the second steel roller 106 are cylindrical with the same outer diameter.

[0052] In other embodiments, the pressure applied by the first cylinder and the second cylinder is controlled at 4 kg / cm². 2 .

[0053] In other embodiments, when the film-applying roller device is used for actual film application, the speed at which the PCB board is conveyed through the gap 103 is controlled at 1.5 m / min. That is, the conveying speed is reduced. If the speed is too fast, the depression in the middle of the board may not be filled before the film is applied. Although the film application efficiency is reduced, the loss of rework and material costs is reduced.

[0054] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A rubber-coated pressure roller, comprising a central pressure roller and a rubber sleeve covering the outer periphery of the pressure roller, characterized in that, The outer diameter of the middle part of the rubber-coated roller is larger than the outer diameter of its two ends, and there is a transition section with a gradually decreasing outer diameter between the middle part and the two ends of the rubber-coated roller.

2. The rubber-coated pressure roller as described in claim 1, characterized in that, The rubber-coated pressure roller has a first straight section with an outer diameter of 100mm in the middle; both ends of the rubber-coated pressure roller have a second straight section with an outer diameter of 98mm, and there is a transition section with a gradually decreasing outer diameter between the first straight section and the second straight sections at both ends.

3. The rubber-coated pressure roller as described in claim 2, characterized in that, The outer diameter of the pressure roller in the first straight section is 95mm, the outer diameter of the pressure roller in the second straight section is 92mm, and the outer diameter of the pressure roller in the transition section gradually decreases from 95mm on the inside to 92mm on the outside.

4. The rubber-coated pressure roller as described in claim 3, characterized in that, The thickness of the rubber sleeve at the first straight section is 2.5 mm, and the thickness of the rubber sleeve at the second straight section is 3 mm; the thickness of the rubber sleeve at the transition section gradually increases from 2.5 mm on the inside to 3 mm on the outside.

5. The rubber-coated pressure roller as described in claim 2, characterized in that, The pressure roller is a cylinder with a uniform outer diameter, and the outer diameter of the pressure roller is 92mm.

6. The rubber-coated pressure roller as described in claim 5, characterized in that, The thickness of the rubber sleeve at the first straight section is 4mm, and the thickness of the rubber sleeve at the second straight section is 3mm; the thickness of the rubber sleeve at the transition section gradually decreases from 4mm on the inside to 3mm on the outside.

7. The rubber-coated pressure roller according to any one of claims 2-6, characterized in that, The length of the first straight section is 20mm, and the length of the second straight section is 50mm.

8. The rubber-coated pressure roller as described in claim 7, characterized in that, The rubber sleeve is made of rubber with a hardness of 55 degrees.

9. A film-applying roller device, characterized in that, It includes two parallel coated rollers, a first coated roller and a second coated roller, both of which are coated rollers as described in any one of claims 1-8, and a gap is formed between the first coated roller and the second coated roller for the PCB board to pass through.

10. The film-applying roller device as described in claim 9, characterized in that, The upper end of the first rubber-coated pressure roller is provided with an adjacent first steel roller and a first cylinder for driving the first steel roller to move up and down. The lower end of the second rubber-coated pressure roller is provided with an adjacent second steel roller and a second cylinder for driving the second steel roller to move up and down.

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