Pre-pressing structure for PTFE (Polytetrafluoroethylene) perfluoro flat sheet membrane production

Abstract

The utility model provides a pre-pressing structure for producing a PTFE (Polytetrafluoroethylene) perfluoro flat sheet membrane. The pre-pressing structure comprises a fixed part and a movable part. The fixing part comprises a base, a lower pressing box and an elastic part; the lower pressing box is arranged at the top of the base, the outer side edge is flush with the base, and a through hole is transversely formed in the side part of the lower pressing box; one end of the elastic piece is movably arranged at the side part of the base, and the other end is correspondingly positioned in the through hole of the lower pressing box through sliding and angle adjustment of the elastic piece; the movable part comprises a pressing driving part and a pressing plate; the downward pressing driving part is located over the downward pressing box, the pressing plate is detachably connected with the movable end of the downward pressing driving part, the size of the pressing plate is matched with the internal size of the downward pressing box, and the pressing plate and the downward pressing box are arranged in a matched mode. According to the utility model, the lower pressing box and the base can be quickly connected through the elastic piece, the lower pressing boxes with different inner cavity sizes can be conveniently replaced so as to meet the processing requirements of PTFE (Polytetrafluoroethylene) perfluoro flat sheet membrane products with different sizes, and the lower pressing plate is detachably arranged and can be matched with the lower pressing box for replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of PTFE flat membrane processing, in particular to a pre-pressing structure for producing PTFE perfluorinated flat membranes. Background Art

[0002] The raw material of PTFE perfluoro flat membrane products is granular PTFE (polytetrafluoroethylene) resin, which is usually formed by compression molding and then sintering. It can also be formed by extrusion molding, isostatic molding or dispersion coating, as well as secondary processing such as welding, bonding, machining, and spraying.

[0003] Compression molding is to add polytetrafluoroethylene resin powder into the mold, maintain it at 25-50 MPa for a certain period of time, and then demold it to obtain a preformed product that has been shaped but has low mechanical strength. The preformed product is then sintered and molded. The existing pre-pressing mold achieves pre-pressing through the cooperation of a fixed mold and a movable mold, but the fixed mold and the movable mold are fixed to the mold frame and can only be used for PTFE perfluoro flat membrane products of the same size. There are also mold structures with replaceable fixed molds or movable molds, but the installation and disassembly operations are cumbersome and complicated, and it is not easy to replace frequently. Utility Model Content

[0004] Based on this, it is necessary to provide a pre-pressing structure for the production of PTFE perfluoro flat membranes to address the problems of the existing pre-pressing modules, such as the single size of pre-pressed products or the limited operation of changing molds.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pre-pressing structure for producing a PTFE perfluorinated flat membrane comprises a fixed part and a movable part.

[0007] The fixing part includes a base, a lower pressure box and an elastic member; the lower pressure box is placed on the top of the base, the outer edge of the lower pressure box is flush with the base, and a through hole is transversely opened on the side of the lower pressure box; one end of the elastic member is movably arranged on the side of the base, and the other end is correspondingly located in the through hole of the lower pressure box through the sliding and angle adjustment of the elastic member;

[0008] The movable parts include a downward pressing driving member and a pressing plate; the downward pressing driving member is located directly above the downward pressing box, the pressing plate is detachably connected to the movable end of the downward pressing driving member, the size of the pressing plate is adapted to the internal size of the downward pressing box, and the two are arranged in a matching manner.

[0009] Furthermore, the elastic member includes a limit block, a spring 1 and a U-shaped rod; the side of the base is horizontally and inwardly opened with a first cavity and a second cavity connected in sequence, and the diameter of the second cavity is larger than that of the first cavity; the limit block is located in the second cavity, and the U-shaped rod has a long end and a short end; the long end passes through the first cavity and is connected to the limit block, and the short end is located outside the base; the two ends of the spring 1 are respectively in contact with the limit block and the inner wall of the second cavity, and are wrapped around the outer surface of the long end of the U-shaped rod; when the U-shaped rod is distributed longitudinally and the limit block fits the end wall of the second cavity, the short end of the U-shaped rod is located in the through hole of the lower pressure box.

[0010] Furthermore, the elastic member includes an L-shaped rod, a second spring and a limit rod; one end of the L-shaped rod is rotatably connected to the base, the limit rod crosses the other end of the L-shaped rod, the diameters of both ends of the limit rod are larger than the middle diameter, and the second spring is arranged between the inner side of the L-shaped rod and the end of the limit rod; when the limit rod is flush with the through hole of the lower pressure box, the end of the limit rod in contact with the second spring is located in the through hole of the lower pressure box.

[0011] Furthermore, a positioning protrusion is fixedly provided on the top of the base, and a positioning hole adapted to the positioning protrusion is opened on the bottom of the lower pressure box.

[0012] Furthermore, the inner top of the lower pressure box gradually increases in size from bottom to top to form a guide portion.

[0013] Furthermore, the downward pressure driving component includes a linear guide slide, a side plate and a support plate; the movable end of the linear guide slide is fixedly connected to the side plate, the bottom end of the side plate is located below the linear guide slide and is fixedly connected to the support plate, and the pressure plate is detachably mounted on the support plate.

[0014] Furthermore, the edge of the support plate is located on the outer side of the side plate.

[0015] Furthermore, the pressure plate includes a bottom plate, a partition block and a U-shaped plate; the height of the bottom plate matches the depth of the inner cavity of the lower pressure box, the partition block is fixed to the top of the bottom plate, the U-shaped plate is sleeved on the edge of the support plate, and the bottom end is fixed to the partition block, and the U-shaped plate and the support plate are bolted.

[0016] Furthermore, the top edge of the pressure plate extends horizontally outward to form an extension portion, the size of the extension portion is consistent with the size of the edge of the support plate, the height of the pressure plate is greater than the depth of the inner cavity of the lower pressure box, and the pressure plate and the support plate are bolted together.

[0017] Furthermore, the thickness of the partition block is greater than the length of the bolt end.

[0018] Compared with the prior art, the beneficial effects of the utility model include:

[0019] 1. The utility model can realize the quick connection between the lower pressure box and the base through the elastic part, and it is convenient to replace the lower pressure boxes with different inner cavity sizes to meet the processing requirements of PTFE perfluoro flat membrane products of different sizes, and the lower pressure plate is detachable and can be replaced with the lower pressure box;

[0020] 2. The utility model is provided with a positioning protrusion and a positioning hole, which can quickly position the lower pressure box, and the lower pressure box and the base are connected in cooperation with the elastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0022] Figure 1 A three-dimensional diagram of a pre-pressing structure for producing a PTFE perfluoro flat membrane introduced in Example 1 of the utility model;

[0023] Figure 2 Based on Figure 1 A front view of the pre-pressing structure for producing the PTFE perfluorinated flat membrane;

[0024] Figure 3 Based on Figure 1 A schematic diagram of an elastic member;

[0025] Figure 4 This is a schematic diagram of the elastic member introduced in Example 2;

[0026] Figure 5 This is a schematic diagram of the pressure plate introduced in Example 3.

[0027] Explanations in the figure: 1. Fixed part; 11. Base; 111. Positioning protrusion; 12. Pressing box; 13. Elastic part; 131. Limit block; 132. Spring 1; 133. U-shaped rod; 134. L-shaped rod; 135. Limit rod; 136. Spring 2; 2. Movable part; 21. Pressing drive part; 211. Linear guide slide; 212. Side plate; 213. Support plate; 22. Pressing plate; 221. Bottom plate; 222. Separating block; 223. U-shaped plate. DETAILED DESCRIPTION

[0028] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0029] Example 1

[0030] See also Figure 1-2 This embodiment introduces a pre-pressing structure for producing a PTFE perfluorinated flat membrane, which is mainly composed of a fixed component 1 and a movable component 2. The fixed component 1 is located at the top, and the movable component 2 is located at the bottom.

[0031] The fixing component 1 mainly includes a base 11, a lower pressure box 12 and an elastic member 13. The base 11 can be placed directly on the ground, or on a corresponding work surface. The lower pressure box 12 is placed on the top of the base 11, and the outer edge is flush with the base 11. In order to facilitate the alignment of the base 11 and the lower pressure box 12, positioning protrusions 111 are fixed at the top four corners of the base 11. The top of the positioning protrusion 111 is truncated cone-shaped, and the diameter gradually decreases from bottom to top, and the bottom four corners of the lower pressure box 12 are provided with positioning holes adapted to the positioning protrusions 111. The positioning protrusions 111 and the positioning holes allow the base 11 and the lower pressure box 12 to be quickly aligned.

[0032] The top of the lower pressing box 12 has a cavity for accommodating materials, and the top is unobstructed. To facilitate the guide of the movable component 2 into the lower pressing box 12, the size of the cavity top of the lower pressing box 12 gradually increases from bottom to top to form a guide portion. The base 11 and the lower pressing box 12 are limitedly connected by an elastic member 13.

[0033] like Figure 3 As shown, the elastic member 13 is mainly composed of a stopper 131, a spring 132 and a U-shaped rod 133. The side of the base 11 is horizontally inwardly opened with a first cavity and a second cavity connected in sequence. The diameter of the second cavity is larger than that of the first cavity, that is, the second cavity with a larger diameter is deep in the base 11, and the first cavity is outside. The size of the stopper 131 is adapted to the second cavity, that is, the stopper 131 fits the second cavity and can slide horizontally in the second cavity. The end face size of the U-shaped rod 133 is adapted to the first cavity. The U-shaped rod 133 has a long end and a short end; the long end passes through the first cavity and is connected to the stopper 131. The lower pressure box 12 is correspondingly opened with a through hole for the short end of the U-shaped rod 133 to penetrate. The angle of the U-shaped rod 133 is adjusted. When the long end of the U-shaped rod 133 follows the stopper 131 to enter the depth of the second cavity, the short end of the U-shaped rod 133 can be located in the through hole of the lower pressure box 12. The spring 132 is wound around the outer surface of the long end of the U-shaped rod 133 and is located between the stop block 131 and the wall of the second cavity, and is used to push the stop block 131 to slide deep into the second cavity. Restricted by the elastic member 13, the lower pressure box 12 and the base 11 are not easy to separate, so that the purpose of quickly installing the lower pressure box 12 is achieved. According to the size to be prepared, the lower pressure box 12 with a matching cavity can be replaced, and the operation of replacing the lower pressure box 12 is simple and quick.

[0034] The movable component 2 is mainly composed of a downward pressure driving member 21 and a pressure plate 22. The downward pressure driving member 21 includes a linear guide slide 211, a side plate 212 and a support plate 213. The linear guide slide 211 is located above the downward pressure box 12 and has a certain spacing. The movable end of the linear guide slide 211 is connected to the side plate 212, and the bottom of the side plate 212 is located below the linear guide slide 211 and fixedly connected to the support plate 213. Since the side plate 212 is vertically connected to the movable end of the linear guide slide 211, if the horizontal distance of the movable end of the linear guide slide 211 is short, a hole through which the side plate 212 can pass needs to be opened at the bottom of the linear guide slide 211. If the horizontal distance of the movable end of the linear guide slide 211 extends to the outside of the main body of the linear guide slide 211, the side plate 212 is located outside the linear guide slide 211 and is not affected by the linear guide slide 211.

[0035] There is a certain distance between the support plate 213 and the bottom of the linear guide slide 211, so the movement of the movable end of the linear guide slide 211 can drive the support plate 213 to move, and the linear guide slide 211 does not affect the longitudinal linear movement of the support plate 213. In order to facilitate the connection between the pressure plate 22 and the support plate 213, the edge of the support plate 213 is located on the outside of the side plate 212, that is, the horizontal length of the support plate 213 is greater than the distance between the two side plates 212.

[0036] The pressure plate 22 is composed of a bottom plate 221, a partition block 222 and a U-shaped plate 223. The height of the bottom plate 221 matches the depth of the inner cavity of the lower pressure box 12, and the partition block 222 is fixedly connected to the top of the bottom plate 221. Since the bottom plate 221 can fill the inner cavity of the lower pressure box 12, the partition block 222 is located outside the inner cavity of the lower pressure box 12. The U-shaped plate 223 is sleeved on the edge of the support plate 213, and the bottom end is fixedly connected to the partition block 222, and the U-shaped plate 223 and the support plate 213 are bolted. The thickness of the partition block 222 is greater than the length of the bolt end to prevent the bolt from affecting the bottom plate 221 from entering the inner cavity of the lower pressure box 12.

[0037] The pressing plate 22 is matched with the lower pressing box 12. When the lower pressing box 12 is replaced with an inner cavity of a different size, the pressing plate 22 is also replaced with a size that matches it, that is, the bottom plate 221 in the pressing plate 22 is adapted to the inner cavity of the lower pressing box 12. Since the pressing plate 22 and the support plate 213 are bolted together, disassembly is convenient, and the connection is more stable through the support of the U-shaped plate 223, reducing the possibility of shaking of the pressing plate 22. The linear guide slide 211 is correspondingly installed on the support arm or the corresponding support structure, so that the entire movable component 2 can be suspended above the fixed component 1.

[0038] This embodiment can realize the quick connection between the lower pressure box 12 and the base 11 through the elastic member 13, and can facilitate the replacement of the lower pressure box 12 with different inner cavity sizes to meet the processing requirements of PTFE perfluoro flat membrane products of different sizes, and the lower pressure plate 22 is detachable and can be replaced with the lower pressure box 12.

[0039] Example 2

[0040] like Figure 4 As shown, this embodiment introduces a pre-stressing structure for the production of PTFE perfluoro flat membranes, which is basically the same as the structure of the pre-stressing structure for the production of PTFE perfluoro flat membranes introduced in Example 1. The difference is that the elastic member of this embodiment is mainly composed of an L-shaped rod 134, a second spring 136 and a limit rod 135. One end of the L-shaped rod 134 is rotatably connected to the base 11, and the rotational connection between the two can be achieved through a bearing, or other matching methods. The limit rod 135 crosses the other end of the L-shaped rod 134, and the diameters of both ends of the limit rod 135 are larger than the middle diameter. The end of the limit rod 135 cannot pass through the L-shaped rod, so the limit rod 135 cannot easily detach from the L-shaped rod 134. The second spring 136 is arranged between the inner side of the L-shaped rod 134 and the end of the limit rod 135, so as to push the limit rod 135 to move in the direction of the through hole of the downward pressure box 12. When the limiting rod 135 is flush with the through hole of the lower pressing box 12 , the end of the limiting rod 135 that contacts the second spring 136 is located in the through hole of the lower pressing box 12 .

[0041] This embodiment has the same beneficial effects as Embodiment 1.

[0042] Example 3

[0043] like Figure 5 As shown, this embodiment introduces a pre-pressing structure for the production of PTFE perfluoro flat membranes, which is basically the same as the structure of the pre-pressing structure for the production of PTFE perfluoro flat membranes introduced in Example 1. The difference is that the top edge of the pressing plate 22 of this embodiment extends horizontally outward to form an extension portion, the size of the extension portion is consistent with the edge size of the support plate 213, the height of the pressing plate 22 is greater than the depth of the inner cavity of the lower pressure box 12, and the extension portion of the pressing plate 22 is bolted to the support plate 213. The overall structure of the pressing plate 22 of this embodiment is simpler, and a hole is opened on the extension portion of the pressing plate 22 to allow the bolts to pass through, so the extension portion of the pressing plate 22 is connected to the support plate 213, and the height of other parts of the pressing plate 22 is also greater than the depth of the inner cavity of the lower pressure box 12, so that the bolts do not affect the pressing plate 22 entering the lower pressure box 12, and a hole can also be opened in the extension portion of the pressing plate 22 to accommodate the end of the bolt connected to the nut to prevent the bolt from affecting the pressing plate 22 in the lower pressure box 12.

[0044] This embodiment has the same beneficial effects as Embodiment 1.

[0045] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A pre-pressing structure for producing a PTFE perfluorinated flat membrane, characterized in that: It includes: The fixing component (1) comprises a base (11), a lower pressure box (12) and an elastic member (13); the lower pressure box (12) is placed on the top of the base (11), the outer edge of the lower pressure box (12) is flush with the base (11), and a through hole is transversely opened on the side of the lower pressure box (12); one end of the elastic member (13) is movably arranged on the side of the base (11), and the other end is correspondingly located in the through hole of the lower pressure box (12) through its own sliding and angle adjustment; The movable component (2) comprises a downward pressing driving member (21) and a pressing plate (22); the downward pressing driving member (21) is located directly above the downward pressing box (12); the pressing plate (22) is detachably connected to the movable end of the downward pressing driving member (21); the size of the pressing plate (22) is compatible with the internal size of the downward pressing box (12); and the two are arranged in a matching manner.

2. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 1, characterized in that: The elastic member (13) comprises a limit block (131), a spring 1 (132) and a U-shaped rod (133); a first cavity and a second cavity are horizontally opened inwardly on the side of the base (11), and the diameter of the second cavity is larger than that of the first cavity; the limit block (131) is located in the second cavity, and the U-shaped rod (133) has a long end and a short end; the long end passes through the first cavity and is connected to the limit block (131), and the short end is located outside the base (11); the two ends of the spring 1 (132) are respectively in contact with the limit block (131) and the inner wall of the second cavity, and are wrapped around the outer surface of the long end of the U-shaped rod (133); when the U-shaped rod (133) is distributed longitudinally and the limit block (131) is in contact with the end wall of the second cavity, the short end of the U-shaped rod (133) is located in the through hole of the lower pressure box (12).

3. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 1, characterized in that: The elastic member (13) comprises an L-shaped rod (134), a second spring (136) and a limiting rod (135); one end of the L-shaped rod (134) is rotatably connected to the base (11), the limiting rod (135) crosses the other end of the L-shaped rod (134), the diameters of both ends of the limiting rod (135) are larger than the diameter of the middle part, and the second spring (136) is arranged between the inner side of the L-shaped rod (134) and the end of the limiting rod (135); when the limiting rod (135) is flush with the through hole of the lower pressure box (12), the end of the limiting rod (135) in contact with the second spring (136) is located in the through hole of the lower pressure box (12).

4. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 1, characterized in that: A positioning protrusion (111) is fixedly provided on the top of the base (11), and a positioning hole adapted to the positioning protrusion (111) is opened on the bottom of the lower pressure box (12).

5. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 1, characterized in that: The inner top of the lower pressure box (12) gradually increases in size from bottom to top to form a guide portion.

6. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 1, characterized in that: The pressing driving member (21) comprises a linear guide slide (211), a side plate (212) and a support plate (213); the movable end of the linear guide slide (211) is fixedly connected to the side plate (212), the bottom end of the side plate (212) is located below the linear guide slide (211) and is fixedly connected to the support plate (213), and the pressing plate (22) is detachably mounted on the support plate (213).

7. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 6, characterized in that: The edge of the support plate (213) is located outside the side plate (212).

8. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 7, characterized in that: The pressure plate (22) comprises a bottom plate (221), a partition block (222) and a U-shaped plate (223); the height of the bottom plate (221) matches the depth of the inner cavity of the lower pressure box (12); the partition block (222) is fixedly connected to the top of the bottom plate (221); the U-shaped plate (223) is sleeved on the edge of the support plate (213) and the bottom end is fixedly connected to the partition block (222); the U-shaped plate (223) and the support plate (213) are bolted.

9. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 7, characterized in that: The top edge of the pressing plate (22) extends horizontally outward to form an extension portion, the size of the extension portion is consistent with the edge size of the support plate (213), the height of the pressing plate (22) is greater than the depth of the inner cavity of the lower pressing box (12), and the extension portion of the pressing plate (22) is bolted to the support plate (213).

10. The pre-pressing structure for producing PTFE perfluorinated flat membrane according to claim 9, characterized in that: The thickness of the partition block (222) is greater than the length of the end of the bolt.

Images