A molding device for preparing carbon paper base paper

Abstract

The application provides a molding device for preparing carbon paper base paper, which mainly comprises matched first and second molding plates, wherein the inner surface of the first molding plate is a flat surface; the inner surface of the second molding plate is provided with a first groove in the center, and a well-shaped flow channel network is arranged around the periphery; a second groove and a third groove are symmetrically arranged at the two side edges and are separated from the flow channel network. When the first and second molding plates are hot-pressed and attached, the first molding plate and the first groove form a closed molding chamber. Through the groove layout and the well-shaped flow channel network, the problem of uneven glue discharge and thickness fluctuation of the carbon paper base paper is solved, and the production quality and stability of the carbon paper base paper are improved.

Description

Technical Field

[0001] This application belongs to the field of papermaking process equipment technology, and in particular relates to a molding device for preparing carbon paper base paper. Background Technology

[0002] Currently, most laboratory preparations of carbon paper base paper use mirror-finish double-sided boards as hot-pressing forming boards, such as the attached... Figure 1 As shown, a1 and a2 are conventional mirror-finish double-plate molding boards, lacking both directional glue discharge channels and raw material pre-positioning structures. This results in uneven glue discharge, inconsistent thickness, and inconsistent quality of the carbon paper base paper produced during carbon paper hot pressing. Furthermore, the adhesives used in the hot pressing process exhibit strong adhesion to common mirror-finish metal materials after curing. Therefore, manual application of Teflon release paper is often necessary to separate the carbon paper base paper sample from the mirror panel. Moreover, the adhesive on the Teflon release paper cannot be used continuously at high temperatures, significantly increasing the preparation time of the carbon paper base paper sample and affecting its quality and production stability. Utility Model Content

[0003] To address the shortcomings of the existing technology, this application provides a molding apparatus for preparing carbon paper base paper. By setting up a flow channel network combined with a groove structure, it solves the technical problems of uneven glue discharge and uneven thickness of carbon paper base paper during the hot pressing process of traditional molding apparatus.

[0004] To achieve the above objectives, this application provides a molding apparatus for preparing carbon paper base paper, mainly comprising:

[0005] The first molding plate 100 and the second molding plate 200 are matched in shape and size; the inner surface of the first molding plate 100 is a flat surface; the inner surface of the second molding plate 200 is provided with a first groove structure 210, a flow channel structure 220, a second groove structure 230 and a third groove structure 240.

[0006] The first groove structure 210 is disposed in the central region of the inner surface of the second molding plate 200; the flow channel structure 220 surrounds the first groove structure 210 and isolates them from each other; the flow channel structure 220 includes two parallel transverse flow channels 221 and two parallel longitudinal flow channels 222; wherein the transverse flow channels 221 and the longitudinal flow channels 222 are perpendicularly intersecting and connected to each other to form a grid-shaped flow channel network.

[0007] The second groove structure 230 and the third groove structure 240 are symmetrically arranged on opposite sides of the inner surface of the second molding plate 200, and are respectively isolated from the first groove structure 210 by the flow channel structure 220.

[0008] The inner surface of the first molding plate 100 and the inner surface of the second molding plate 200 are detachably bonded and fixed by hot pressing; wherein, when bonded and fixed, the first molding plate 100 and the second molding plate 200 coincide in spatial position, and the first molding plate 100 and the first groove structure 210 form a closed molding cavity.

[0009] In this application, the depth of the first groove structure 210 is less than the thickness of the second molding plate 200; the first groove structure 210 is located entirely within the surrounding area of ​​the flow channel structure 220, and the maximum outer circle diameter of the first groove structure 210 is less than the minimum inner frame spacing of the flow channel structure 220.

[0010] In this application, the first groove structure 210 is one of a circular groove, a square groove, or a polygonal groove; the first groove structure 210 is used to accommodate pulp fiber raw materials.

[0011] In this application, the transverse flow channel 221 and the longitudinal flow channel 222 are interconnected at their intersection; the two ends of the transverse flow channel 221 penetrate the end side 201 of the second molding plate 200 in the length direction, and the two ends of the longitudinal flow channel 222 penetrate the end side 202 of the second molding plate 200 in the width direction.

[0012] In this application, the flow depth of both the transverse flow channel 221 and the longitudinal flow channel 222 is less than the thickness of the second molding plate 200.

[0013] In this application, the groove shape and groove size of the second groove structure 230 and the third groove structure 240 are the same; wherein, the groove depth of the second groove structure 230 and the third groove structure 240 is less than the thickness of the second molding plate 200.

[0014] Furthermore, the second groove structure 230 is isolated from the flow channel structure 220; the third groove structure 240 is isolated from the flow channel structure 220.

[0015] In this application, a first handle 310 is installed in the middle region of the side of either end of the first molding plate 100, and a second handle 320 is installed in the middle region of the side of either end of the second molding plate 200; the first handle 310 and the second handle 320 are spatially aligned when the inner surface of the first molding plate 100 and the inner surface of the second molding plate 200 are closed.

[0016] In this application, the inner surfaces of the first molding plate 100 and the second molding plate 200 are both coated with an anti-stick coating material. Furthermore, the surface roughness of the anti-stick coating material is consistent on the inner surfaces of the first molding plate 100 and the second molding plate 200, and does not exceed a preset standard value.

[0017] Compared with the prior art, the advantages of this application are as follows:

[0018] This application discloses a molding apparatus for preparing carbon paper base paper. During the hot-pressing process of preparing carbon paper base paper, this application limits the thickness and size of the finished product by setting a first groove structure, resulting in carbon paper base paper samples with uniform thickness and reduced thickness deviation. By setting a grid-shaped flow channel network structure on the second molding plate to form directional adhesive channels, and with the balancing force provided by the second groove structure 230 and the third groove structure 240, the adhesive can be evenly discharged along the flow channels during hot pressing, solving the problem of thickness fluctuation caused by uneven adhesive discharge. This application also steadily improves the yield rate of carbon paper base paper products and significantly increases production efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a standard mirror-finish double-panel molded plate.

[0020] Figure 2 This is a schematic diagram of a molding apparatus for preparing carbon paper base paper in one embodiment of this application.

[0021] Figure 3 This is a front view of the second molding plate in one embodiment of this application.

[0022] Figure 4 This is a top view of the second molding plate in one embodiment of this application.

[0023] Wherein, 100-first molding plate; 200-second molding plate; 210-first groove structure; 220-flow channel structure; 230-second groove structure; 240-third groove structure; 221-transverse flow channel; 222-longitudinal flow channel; 201-end side of the second molding plate in the length direction; 202-end side of the second molding plate in the width direction; 310-first handle; 320-second handle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] Example 1:

[0026] As attached Figure 2 As shown, in order to solve the above-mentioned technical problems, this application provides a molding apparatus for preparing carbon paper base paper, mainly comprising:

[0027] The first molding plate 100 and the second molding plate 200 are matched in shape and size; the inner surface of the first molding plate 100 is a flat surface.

[0028] It should be noted that the appendix Figure 2 In this context, b1 refers to the first molding plate 100, and b2 refers to the second molding plate 200. b1 and b2 have the same shape, size, and dimensions, making it easy to align and fix the two molding plates when they are closed, and also maintaining thermodynamic symmetry during heating. Preferably, the first molding plate 100 and the second molding plate 200 can be made of carbon steel as the base material, but are not limited to this.

[0029] The inner surface of the second molding plate 200 is provided with a first groove structure 210, a flow channel structure 220, a second groove structure 230 and a third groove structure 240.

[0030] It should be noted that the flow channel structure 220 is not connected to or communicates with the first groove structure 210, the second groove structure 230, or the third groove structure 240. There is a certain distance between each groove and between the groove and the flow channel. This distance is not limited and can be customized according to actual needs.

[0031] In this embodiment, the inner surface of the first molding plate 100 and the inner surface of the second molding plate 200 are detachably bonded and fixed by hot pressing; wherein, when bonded and fixed, the first molding plate 100 and the second molding plate 200 coincide in spatial position, and the first molding plate 100 and the first groove structure 210 form a closed molding cavity.

[0032] It should be noted that in this embodiment, the first molding plate 100 and the second molding plate 200 are aligned and bonded to each other before the hot pressing begins, and then fixed by the pressure of the hot press. No additional connecting components, such as bolts, positioning pins, etc., are required for auxiliary positioning. The fitting accuracy can be controlled by the guiding mechanism of the hot press. As long as the four edges of the first molding plate 100 and the second molding plate 200 are completely overlapped when they are bonded, the overall structure of the molding plate is simplified and the production efficiency is improved.

[0033] In this application, the inner surfaces of the first molding plate 100 and the second molding plate 200 are both coated with an anti-stick coating material. Furthermore, the surface roughness of the anti-stick coating material is consistent on the inner surfaces of the first molding plate 100 and the second molding plate 200, and does not exceed a preset standard value.

[0034] It should be noted that the inner surface of the first molding plate 100 is a flat surface. A flat inner surface allows for better control of the glue dispensing uniformity and thickness uniformity during the preparation of the carbon paper base paper. Furthermore, its inner surface can be coated with an anti-sticking material to reduce roughness, effectively preventing the adhesion of lignin in the pulp and making the prepared carbon paper base paper sample easier to separate. The anti-sticking material can preferably be PTFE composite material or PEEK coating material, etc. If PTFE composite material is used, the preset standard value for surface roughness can be set to 0.8 mm, meaning the surface roughness is not greater than 0.8 mm, but this is not a limitation.

[0035] In addition, the inner surface of the second molding plate 200 also needs to be coated with an anti-stick coating material of the same material as the inner surface of the first molding plate 100, and its surface roughness should be consistent with that of the inner surface of the first molding plate 100, so as to ensure the flow stability of the adhesive between the interfaces and avoid the problems of local adhesion and uneven adhesive discharge.

[0036] In this application, the first groove structure 210 is disposed in the central region of the inner surface of the second molding plate 200; the flow channel structure 220 surrounds the first groove structure 210 and isolates them from each other; the flow channel structure 220 includes two parallel transverse flow channels 221 and two parallel longitudinal flow channels 222; wherein the transverse flow channels 221 and the longitudinal flow channels 222 are perpendicularly intersecting and connected to each other to form a grid-shaped flow channel network.

[0037] It should be noted that the first groove structure 210 is one of a circular groove, a square groove, or a polygonal groove; the first groove structure 210 is used to accommodate pulp fiber raw materials.

[0038] As attached Figure 3In this embodiment, the first groove structure 210 is a square groove. The data of the square groove can be customized according to the actual carbon paper base sample size requirements. The purpose of the groove surface design is to limit the thickness and size of the finished product, so that the obtained carbon paper base sample can have uniform thickness and the same size.

[0039] In this application, the second groove structure 230 and the third groove structure 240 are symmetrically arranged on opposite sides of the inner surface of the second molding plate 200, and are respectively isolated from the first groove structure 210 by the flow channel structure 220.

[0040] Furthermore, the groove shape and groove size of the second groove structure 230 and the third groove structure 240 are the same; wherein, the groove depth of the second groove structure 230 and the third groove structure 240 is less than the thickness of the second molding plate 200.

[0041] Furthermore, the second groove structure 230 is isolated from the flow channel structure 220; the third groove structure 240 is isolated from the flow channel structure 220.

[0042] It should be noted that, in this embodiment, the second groove structure 230 and the third groove structure 240 can also be set as one of a circular groove, a square groove or a polygonal groove.

[0043] As attached Figure 3 As shown, the second groove structure 230 and the third groove structure 240 are symmetrically located on the left and right opposite sides of the second molding plate 200, and the part near the edge is open; the two are used to maintain the balanced force of the molding plate during the hot pressing process, so that the glue can flow out smoothly along the flow channel groove, and the glue discharge is uniform.

[0044] It should be noted that the second groove structure 230 and the third groove structure 240 in this embodiment adopt a rounded rectangular shape, and their values ​​are not specifically limited. They can be located on opposite sides of the second molding plate 200 and outside the grid-shaped flow channel network.

[0045] As attached Figure 3As shown, in this embodiment, the first groove structure 210 is a square groove. The data of the square groove can be customized according to the actual carbon paper sample size requirements. The purpose of the groove surface design is to limit the thickness and size of the finished product, so that the carbon paper sample can have uniform thickness and the same size. For example, in this embodiment, the length, width and height of the first molding plate 100 and the second molding plate 200 can be set to 200mm*200mm*11mm. If the carbon paper sample size of the mold shown in the example is length×width×depth=150mm*150mm*0.25mm, then the specific size of the mold groove structure 210 is selected as: length×width×depth=150mm*150mm*0.25mm, and is not limited to this. The function of the flow channel structure 220 is to allow excess adhesive to flow out along the flow channel during the hot pressing process, so as to make the adhesive discharge uniform. The specific dimensions of the flow channel structure 220 are: 6.5mm in width, 2.5mm in depth, and 200mm in length. There are a total of four flow channels, which are intersected to form a cross-shaped flow channel structure of two horizontal and two vertical channels, forming a grid-shaped flow channel network.

[0046] It should be noted that the flow channel structure 220 in this application is designed as a grid-shaped flow channel network structure, which balances the temperature distribution at the intersection nodes and avoids the edge heat dissipation problem of traditional flat molds; and the positive flow channel forms a directional glue guiding channel, which reduces a large part of the glue retention compared with the radial flow channel, greatly improving the glue discharge efficiency; in addition, the grid-shaped structure disperses thermal stress, which can control thermal deformation within a small value and greatly improve thermodynamic stability.

[0047] In this application, the depth of the first groove structure 210 is less than the thickness of the second molding plate 200; the first groove structure 210 is entirely located within the surrounding area of ​​the flow channel structure 220, and the maximum outer circle diameter of the first groove structure 210 is less than the minimum inner frame spacing of the flow channel structure 220. The transverse flow channel 221 and the longitudinal flow channel 222 are interconnected at their intersection; both ends of the transverse flow channel 221 penetrate the end side surface 201 of the second molding plate 200 in the length direction, and both ends of the longitudinal flow channel 222 penetrate the end side surface 202 of the second molding plate 200 in the width direction.

[0048] As attached Figure 4 As shown, the transverse flow channel 221 can be seen to have channels formed by the end side 201 of the second molding plate 200 along its length at both ends. The adhesive in the hot pressing process flows out evenly from these flow channel openings.

[0049] It should be noted that the first groove structure 210 is entirely located within the area surrounded by the flow channel structure 220. This is to ensure that the groove is completely surrounded by the flow channel network, forming a continuous isolation zone. In actual production, the width of the isolation zone directly determines the stability of the adhesive discharge path. For example, in a pulp molding die, when the groove is a square groove with a side length of 30mm, its maximum circumscribed circle diameter is approximately 42.4mm diagonally. The spacing between the inner frames of the grid-shaped flow channel refers to the distance between the inner sides of the two transverse flow channels, set at 45mm. Thus, 42.4mm ≤ 45mm, the groove will not touch the flow channel wall. This dimensional difference is crucial—the 2.6mm gap area is precisely the buffer channel for the adhesive to flow from the groove to the flow channel. If the gap disappears, it will lead to problems such as adhesive accumulation at corners, fiber blockage of the flow channel inlet, and dead zones in heat conduction.

[0050] In this application, the flow depth of both the transverse flow channel 221 and the longitudinal flow channel 222 is less than the thickness of the second molding plate 200.

[0051] Preferably, the depth of the first groove structure 210 can be set to 0.25mm, and the thickness of the second molding plate 200 can be set to 11mm, which can be customized according to actual needs and are not limited thereto. Preferably, the depth of the transverse flow channel 221 and the longitudinal flow channel 222 can be set to 2.5mm, which are not limited thereto.

[0052] In this embodiment, the first groove structure 210 at the center of the second molding plate 200 can form a pressure balance core. After the pulp is injected into the first groove structure 210, the adhesive radiates outward under pressure. The grid-shaped flow channel serves as an equidistant flow distribution network, allowing the adhesive to be uniformly discharged along the transverse flow channel 221 or the longitudinal flow channel 222.

[0053] In this embodiment of the application, a first handle 310 is installed in the middle region of the side of any end of the first molding plate 100, and a second handle 320 is installed in the middle region of the side of any end of the second molding plate 200; the first handle 310 and the second handle 320 coincide in spatial position when the inner surface of the first molding plate 100 and the inner surface of the second molding plate 200 are covered.

[0054] In this embodiment, a silicone heat insulation layer can also be applied to the first handle 310 and the second handle 320 to prevent the operator from being burned when touching the handle groove after the molding plate is hot-pressed. However, this is not the only possibility.

[0055] In summary, the embodiments of this application solve the technical problems of uneven glue discharge and uneven thickness of carbon paper base paper during the hot pressing process of traditional molding devices by setting up a flow channel network combined with a groove structure. It solves the problems of uneven glue discharge and uneven thickness of carbon paper base paper preparation, as well as the problem of carbon paper base paper not being easy to separate due to the curing of the adhesive and the bonding with the metal currently used, which greatly improves production efficiency and pass rate.

[0056] Example 2:

[0057] In this embodiment, the specific process for preparing carbon paper base paper using a molding device is as follows:

[0058] The first step is to impregnate the precursor in the impregnation resin for 15 minutes.

[0059] The second step is to bake the impregnated precursor in a 60°C oven for 5-8 minutes.

[0060] The third step is to transfer the dried precursor to the slotted position of the second molding plate 200, namely the first groove structure 210.

[0061] The fourth step is to cover the first molding plate 100 with the second molding plate 200, and then hot press them together under a hot press. The hot pressing conditions are: hot pressing temperature 180℃, hot pressing time 30min, and hot pressing pressure 1MPa.

[0062] The fifth step is to remove the prepared carbon paper base paper from the slotted position of the second molding plate 200.

[0063] Following the steps above, prepare six sheets of carbon paper base paper in sequence, and then conduct thickness and quality tests.

[0064] Specifically, the data for the molding device used to prepare the carbon paper base can be assumed to be as follows:

[0065] The length, width, and height of the first molding plate 100 and the second molding plate 200 are 200mm*200mm*11mm; the specific dimensions of the first groove structure 210 of the mold are: length × width × depth = 150mm*150mm*0.25mm; the specific dimensions of the flow channel structure 220 are: width of 6.5mm, depth of 2.5mm, and length of 200mm.

[0066] The final test results are shown in the table below:

[0067]

[0068] According to the above test results, the thickness of the six prepared samples is 0.25±0.01mm, with a range of no more than 0.02mm; the average mass is 2.50g, with a range of no more than 0.04g, indicating that the carbon paper base paper prepared under the same preparation process has uniform mass.

[0069] In summary, based on the verification of the above embodiments, the combined groove and flow channel structure of the molding device for preparing carbon paper base paper in this embodiment can meet the requirements of preparing carbon paper base paper with uniform glue discharge, uniform thickness, and uniform quality under the same process in actual production. At the same time, both plates in the molding device are treated with a special non-stick layer with high flatness, which effectively solves the problem of poor separation of carbon paper base paper caused by the adhesion of the adhesive to the metal, and greatly improves the production quality, efficiency and stability of carbon paper base paper.

[0070] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0071] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A molding apparatus for preparing carbon paper base paper, comprising: A first molding plate (100) and a second molding plate (200), wherein the shapes and dimensions of the first molding plate (100) and the second molding plate (200) are matched; the inner surface of the first molding plate (100) is a flat surface; characterized in that, The inner surface of the second molding plate (200) is provided with a first groove structure (210), a flow channel structure (220), a second groove structure (230) and a third groove structure (240). The first groove structure (210) is disposed in the central region of the inner surface of the second molding plate (200); the flow channel structure (220) surrounds the first groove structure (210) and is isolated from it; the flow channel structure (220) includes two parallel transverse flow channels (221) and two parallel longitudinal flow channels (222); wherein the transverse flow channels (221) and the longitudinal flow channels (222) are perpendicularly intersecting and connected to each other to form a grid-shaped flow channel network; The second groove structure (230) and the third groove structure (240) are symmetrically arranged on opposite sides of the inner surface of the second molding plate (200), and are respectively isolated from the first groove structure (210) by the flow channel structure (220); The inner surface of the first molding plate (100) and the inner surface of the second molding plate (200) are detachably bonded and fixed by hot pressing; wherein, when bonded and fixed, the first molding plate (100) and the second molding plate (200) coincide in spatial position, and the first molding plate (100) and the first groove structure (210) form a closed molding cavity.

2. The molding apparatus for preparing carbon paper base paper according to claim 1, characterized in that, The depth of the first groove structure (210) is less than the thickness of the second molding plate (200); the first groove structure (210) is located entirely within the area surrounded by the flow channel structure (220), and the maximum outer circle diameter of the first groove structure (210) is less than the minimum inner frame spacing of the flow channel structure (220).

3. The molding apparatus for preparing carbon paper base paper according to claim 2, characterized in that, The first groove structure (210) is one of a circular groove, a square groove or a polygonal groove; the first groove structure (210) is used to accommodate pulp fiber raw materials.

4. The molding apparatus for preparing carbon paper base paper according to claim 3, characterized in that, The transverse flow channel (221) and the longitudinal flow channel (222) are interconnected at their intersection; The transverse flow channel (221) extends through the end side (201) of the second molding plate (200) in the length direction at both ends, and the longitudinal flow channel (222) extends through the end side (202) of the second molding plate (200) in the width direction at both ends.

5. The molding apparatus for preparing carbon paper base paper according to claim 4, characterized in that, The depth of both the transverse flow channel (221) and the longitudinal flow channel (222) is less than the thickness of the second molding plate (200).

6. The molding apparatus for preparing carbon paper base paper according to claim 5, characterized in that, The groove shape and groove size of the second groove structure (230) and the third groove structure (240) are the same; wherein, the groove depth of the second groove structure (230) and the third groove structure (240) is less than the thickness of the second molding plate (200).

7. The molding apparatus for preparing carbon paper base paper according to claim 6, characterized in that, The second groove structure (230) is isolated from the flow channel structure (220); the third groove structure (240) is isolated from the flow channel structure (220).

8. The molding apparatus for preparing carbon paper base paper according to claim 1, characterized in that, A first handle (310) is installed in the middle area of ​​the side of either end of the first molding plate (100), and a second handle (320) is installed in the middle area of ​​the side of either end of the second molding plate (200). The first handle (310) and the second handle (320) are spatially aligned when the inner surface of the first molded plate (100) and the inner surface of the second molded plate (200) are closed.

9. The molding apparatus for preparing carbon paper base paper according to claim 1, characterized in that, The inner surface of the first molding plate (100) and the inner surface of the second molding plate (200) are both coated with an anti-stick coating material.

10. The molding apparatus for preparing carbon paper base paper according to claim 9, characterized in that, The surface roughness of the anti-stick coating material is consistent on the inner surface of the first molding plate (100) and the inner surface of the second molding plate (200), and is not greater than a preset standard value.

Images