Wet compression molding device for sealing cover and preparation process

Abstract

The invention relates to the technical field of wet compression molding, and provides a sealing cover wet compression molding device and a preparation technology.The sealing cover wet compression molding device comprises a plurality of positioning clamping grooves, a stretching frame mechanism and a pressing butt joint mechanism, and the multiple positioning clamping grooves are formed in a mold base; and the stretching frame mechanism is detachably connected with the lower die and used for stretching and fixing fiber cloth, the pressing butt joint mechanism is detachably connected with the positioning clamping groove, the pressing butt joint mechanism is detachably connected with the stretching frame mechanism, and the pressing butt joint mechanism is used for conducting butt joint on the stretching frame mechanism and the lower die. The device is used for solving the problem that in the prior art, when a mold with protrusions on the configuration is subjected to mold pressing, fiber cloth is prone to wrinkling near the protrusions.

Description

Technical Field

[0001] The present invention relates to the technical field of wet molding, and in particular to a sealing cover wet molding device and a preparation process. Background Art

[0002] The main feature of the wet molding process is that dry fiber cloth is cut in the early stage, sprayed / coated with resin before being placed in the mold for molding and curing. This also makes this process more suitable for processing products with less complex shapes and is widely used in various industries. Its advantages are fast batch production cycle, simple mold design, and low unit cost. Workers first place the cut fiber cloth in the mold, and then spray the resin through automated equipment. After the resin is evenly laid on the fiber cloth, the upper part of the mold uses a hydraulic device to press and heat the fiber cloth and resin.

[0003] When manufacturing a flat configuration, the interior of the mold is also a horizontal surface, and the fiber cloth can be placed flat in the mold. However, when it is necessary to press-mold a relatively complex configuration with protrusions, such as a sealing cover, after the fiber cloth is placed in the mold, wrinkles of the fiber cloth will inevitably appear near the protrusions on the configuration after press-mold, resulting in different thicknesses at different positions of the molded object. At the same time, positions with different thicknesses are also prone to entrapment of bubbles during the resin flow process, resulting in substandard quality of the press-molded object. Summary of the Invention

[0004] The present invention provides a sealing cover wet compression molding device and a preparation process, which are used to solve the problem in the prior art that when a mold with a protrusion is compression molded, the fiber cloth is prone to wrinkles near the protrusion.

[0005] The technical solutions of the present invention are as follows:

[0006] A sealing cover wet molding device includes a mold base and a mold top seat, the mold base and the mold base are respectively fixedly mounted on the bottom and top of a hydraulic device, the mold base is provided with a lower mold, the mold top seat is provided with an upper mold, the lower mold and the upper mold match, and also includes a positioning slot, a stretching frame mechanism and a pressing and docking mechanism, a plurality of positioning slots are provided, and a plurality of the positioning slots are opened on the mold base, the stretching frame mechanism is detachably connected to the lower mold, the stretching frame mechanism is used to stretch and fix the fiber cloth, the pressing and docking mechanism is detachably connected to the positioning slot, the pressing and docking mechanism is detachably connected to the stretching frame mechanism, and the pressing and docking mechanism is used to dock the stretching frame mechanism with the lower mold.

[0007] The stretching frame mechanism includes a lower frame and an upper frame, the lower frame is detachably connected to the lower mold or the press-to-docking mechanism, the upper frame is detachably connected to the lower mold or the press-to-docking mechanism, and the lower frame is detachably connected to the upper frame. When the upper frame and the upper frame are connected to each other, the fiber cloth is arranged between the upper frame and the lower frame.

[0008] The upper frame is provided with a plurality of docking posts, and the lower frame is provided with a plurality of docking holes. The docking posts correspond to the docking holes one by one, and the docking posts penetrate the fiber cloth and dock with the docking holes.

[0009] A clamping groove is provided on one side of the docking column away from the upper frame, a plurality of clamping rings are provided in the docking hole, and the clamping groove and the clamping rings are detachably connected.

[0010] A separator is fixedly connected to one side of the inner ring of the upper frame close to the lower frame. When the snap-fit groove is connected to the snap-fit ring close to the upper frame among the multiple snap-fit rings, a gap is left between the separator and the lower frame.

[0011] The pressing and docking mechanism includes a frame body, a sliding mounting frame and a pushing frame, a plurality of positioning brackets are fixedly connected to the frame body, the positioning brackets are detachably connected to the positioning slots, the sliding mounting frame is fixedly connected to the frame body, the sliding mounting frame can contact the lower mold, the sliding mounting frame cooperates with the lower mold, when the upper frame is connected to the lower frame, the stretching frame mechanism can be detachably connected to the sliding mounting frame, the pushing frame is slidably arranged in the sliding mounting frame, and a plurality of springs are fixedly connected between the pushing frame and the sliding mounting frame. Pressing the pushing frame can press the upper frame and the lower frame into the lower mold.

[0012] When the pushing frame presses the upper frame into the lower mold, a gap exists between the separating knife and the lower frame.

[0013] The upper mold is provided with a pressing groove corresponding to the upper frame. When the upper mold and the lower mold press the fiber cloth, the pressing groove and the lower mold press the upper frame and the lower frame. At this time, the clamping groove is connected to the clamping ring away from the upper frame, and the dividing knife is in contact with the lower frame.

[0014] Before compression molding, a release agent needs to be sprayed on the upper mold, the lower mold, the upper frame and the lower frame.

[0015] A sealing cover wet compression molding process, using the sealing cover wet compression molding device described above, comprises the following steps:

[0016] Step 1, spraying a release agent: spraying a release agent on the upper frame, the lower frame, the upper mold and the lower mold;

[0017] Step 2: Install the fiber cloth: insert the docking post on the upper frame through the fiber cloth and into the docking hole, so that the clamping groove and the clamping ring are docked;

[0018] Step 3: Attach the frame: install the upper frame and the lower frame in the sliding mounting frame, and connect the positioning bracket with the positioning slot;

[0019] Step 4: Placing the fiber cloth: Press the push-in frame to push the upper frame and the lower frame into the lower mold so that the lower frame fits the lower mold;

[0020] Step 5: Spraying resin: The automated device sprays the resin onto the fiber cloth;

[0021] Step 6: Compression molding: The hydraulic device drives the mold top seat to move downward, so that the upper mold is connected to the lower mold, the pressing groove presses the upper frame, the upper frame moves toward the lower frame, and the separating knife contacts the lower frame.

[0022] The working principle and beneficial effects of the present invention are:

[0023] 1. In the present invention, an upper frame and a lower frame are provided to clamp the fiber cloth, thereby preventing the edge of the fiber cloth from moving during the die pressing process. At the same time, a separating knife can separate the edge of the die-molded product from the central portion, thereby preventing the edge from affecting the molding of the central portion.

[0024] 2. In the present invention, by setting a stretching frame mechanism, the fiber cloth can be stretched to prevent the edge of the fiber cloth from being stretched and wrinkled during molding. By setting a pressing docking mechanism, the stretching frame mechanism can be conveniently installed on the lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 Schematic diagram of the separation structure of the mold base and the mold top in the present invention;

[0028] Figure 3 Schematic diagram of the separation structure of the mold base and the mold top seat from another perspective in the present invention;

[0029] Figure 4 This is a schematic diagram of the structure in which the upper frame and the lower frame are separated in the present invention;

[0030] Figure 5 It is a partial cross-sectional structural schematic diagram of the upper frame and the lower frame in the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the press-butt mechanism and the mold base in the present invention;

[0032] Figure 7 It is a schematic diagram of the partial structure of the cooperation between the stretching frame mechanism and the pressing docking mechanism in the present invention.

[0033] In the figure: 1. Mold base; 2. Mold top seat; 3. Lower mold; 4. Upper mold; 5. Positioning slot; 6. Lower frame; 7. Upper frame; 8. Docking column; 9. Docking hole; 10. Snap-on slot; 11. Snap-on ring; 12. Separating knife; 13. Frame; 14. Positioning bracket; 15. Sliding mounting frame; 16. Push-in frame; 17. Pressing slot. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] Example 1

[0036] like Figures 1 to 7As shown, this embodiment proposes a sealing cover wet molding device, including a mold base 1 and a mold top seat 2, the mold base 1 and the mold base 1 are fixedly mounted on the bottom and top of the hydraulic device respectively, the mold base 1 is provided with a lower mold 3, the mold top seat 2 is provided with an upper mold 4, the lower mold 3 and the upper mold 4 match, and also include a positioning card slot 5, a stretching frame mechanism and a pressing docking mechanism, a plurality of positioning card slots 5 are provided, and a plurality of positioning card slots 5 are opened on the mold base 1, the stretching frame mechanism is detachably connected to the lower mold 3, the stretching frame mechanism is used to stretch and fix the fiber cloth, the pressing docking mechanism is detachably connected to the positioning card slot 5, and the pressing docking mechanism It is detachably connected to the stretching frame mechanism, and the pressing docking mechanism is used to dock the stretching frame mechanism with the lower mold 3. When the sealing cover is wet-molded, due to the raised configuration of the sealing cover, the fiber cloth is stretched to a relatively tight state by the stretching frame mechanism, and is installed in the lower mold 3 by pressing the docking mechanism. The stretching frame mechanism is fixed in the lower mold 3 through the close contact between the lower mold 3 and the stretching frame mechanism. Thereafter, when the compression molding is performed, the fiber cloth is separated by pressing the stretching frame mechanism to prevent the fiber cloth between the upper frame 7 and the lower frame 6 from remaining connected to the fiber cloth in the center of the mold when the fiber cloth and the resin are cured.

[0037] like Figures 2 to 5 As shown, the stretching frame mechanism includes a lower frame 6 and an upper frame 7. The lower frame 6 is detachably connected to the lower mold 3 or the press-butt mechanism, the upper frame 7 is detachably connected to the lower mold 3 or the press-butt mechanism, and the lower frame 6 is detachably connected to the upper frame 7. When the upper frame 7 and the upper frame 7 are connected, the fiber cloth is arranged between the upper frame 7 and the lower frame 6. The upper frame 7 and the lower frame 6 form a structure similar to a photo frame to fix the fiber cloth and stretch and fix the four sides of the fiber cloth so that the fiber cloth remains flat. When the lower frame 6 and the upper frame 7 are connected to the lower mold 3, the protrusions on the mold can support the fiber cloth and avoid wrinkles in the fiber cloth by stretching the edges.

[0038] like Figures 2 to 5As shown, a plurality of docking posts 8 are provided on the upper frame 7, and a plurality of docking holes 9 are provided on the lower frame 6. The docking posts 8 and the docking holes 9 correspond one to one, and the docking posts 8 penetrate the fiber cloth and dock with the docking holes 9. A snap-fit groove 10 is provided on the side of the docking post 8 away from the upper frame 7, and a plurality of snap-fit rings 11 are provided in the docking hole 9. The snap-fit groove 10 and the snap-fit ring 11 are detachably connected. A separator 12 is fixedly connected to the side of the inner ring of the upper frame 7 close to the lower frame 6. When the snap-fit groove 10 is connected to the snap-fit ring 11 close to the upper frame 7 among the plurality of snap-fit rings 11, a gap is left between the separator 12 and the lower frame 6. When the upper frame 7 and the lower frame 6 are docked, the snap-fit groove 10 is docked with the clamping ring 11 close to the upper frame 7, which can avoid the separating knife 12 and the fiber cloth from being squeezed too tightly. When the pressing groove 17 presses the upper frame 7, the docking column 8 can slide towards the lower mold 3 in the docking hole 9 and dock with the clamping ring 11 closer to the lower mold 3, so that the separating knife 12 squeezes the fiber cloth more tightly. The pressing of the fiber cloth by the separating knife 12 does not mean that the fiber cloth is cut off. Part of the resin will flow into between the upper frame 7 and the lower frame 6, and be separated by the separating knife 12, which can make it easier to separate the partially solidified resin and fiber cloth between the upper frame 7 and the lower frame 6 later. The central part of the obtained stretching frame mechanism is the finished product.

[0039] like Figures 6 and 7As shown, the pressing and docking mechanism includes a frame body 13, a sliding mounting frame 15 and a pushing frame 16. A plurality of positioning brackets 14 are fixedly connected to the frame body 13. The positioning brackets 14 are detachably connected to the positioning slots 5. The sliding mounting frame 15 is fixedly connected to the frame body 13. The sliding mounting frame 15 can contact the lower mold 3. The sliding mounting frame 15 cooperates with the lower mold 3. When the upper frame 7 is connected to the lower frame 6, the stretching frame mechanism can be detachably connected to the sliding mounting frame 15. The pushing frame 16 is slidably set in the sliding mounting frame 15. A plurality of springs are fixedly connected between the pushing frame 16 and the sliding mounting frame 15. Pressing the pushing frame 16 can press the upper frame 7 and the lower frame 6 into the lower mold 3. The upper frame 7 and the lower frame 6 are tightly attached to the edge of the lower mold 3. The stretching frame mechanism can be fixed by the clamping effect. Therefore, in order to facilitate the more accurate placement of the stretching frame mechanism In the lower mold 3, a pressing docking mechanism is set, which is docked with the mold base 1 through the positioning bracket 14 and the positioning slot 5. After the sliding mounting frame 15 is aligned with the lower mold 3, the pressing and pushing frame 16 keeps the stretching frame mechanism in a relatively horizontal state and pushes it into the lower mold 3. At the same time, it does not directly contact the fiber cloth set between the upper frame 7 and the lower frame 6, which can also reduce the generation of wrinkles. After the stretching frame mechanism is sent into the lower mold 3, the protrusion on the lower mold 3 lifts the fiber cloth, and then the resin is sprayed and the mold is pressed. The stretching of the fiber cloth by the stretching frame mechanism can make the fiber cloth stretch the protruding part of the mold through its own elasticity. When the protrusion in the mold of the sealing cover is higher, a larger area of fiber cloth can be set between the upper frame 7 and the lower frame 6 on the stretching frame mechanism to avoid wrinkles caused by irregular squeezing of the fiber cloth during the mold.

[0040] like Figures 6 and 7 As shown, when the push-in frame 16 presses the upper frame 7 into the lower mold 3, there is a gap between the separating knife 12 and the lower frame 6. The upper mold 4 is provided with a pressing groove 17 corresponding to the upper frame 7. When the upper mold 4 and the lower mold 3 press the fiber cloth, the pressing groove 17 and the lower mold 3 press the upper frame 7 and the lower frame 6. At this time, the clamping groove 10 is connected to the clamping ring 11 away from the upper frame 7, and the separating knife 12 is in contact with the lower frame 6. The separating knife 12 separates the finished product formed by the resin and the fiber sheet. After the upper frame 7 and the lower frame 6 are separated, it is convenient to cut and separate the position separated by the separating knife 12 to obtain the finished product.

[0041] Before compression molding, a release agent needs to be sprayed on the upper mold 4, the lower mold 3, the upper frame 7 and the lower frame 6. The release agent can facilitate the separation of the upper frame 7 and the lower frame 6.

[0042] In this embodiment, an upper frame 7 and a lower frame 6 are provided to form a structure similar to a picture frame, so that the fiber cloth is stretched flat, thereby preventing the fiber cloth at the raised portion of the mold from being stretched and wrinkled when the mold of the sealing cover is press-molded. At the same time, the upper frame 7 and the lower frame 6 separate the edges of the fiber cloth, which can be easily removed after the press-molding. At the same time, when the upper frame 7 and the lower frame 6 are used for structures with more complex configurations, a fiber cloth with a larger area can be provided on the inner circle of the upper frame 7 and the lower frame 6, so that the fiber cloth has more area for molding after contacting the raised portion.

[0043] Example 2

[0044] A sealing cover wet compression molding preparation process, using a sealing cover wet compression molding device, includes the following steps:

[0045] Step 1: Spraying a release agent: spraying a release agent on the upper frame 7, the lower frame 6, the upper mold 4 and the lower mold 3;

[0046] Step 2: Install the fiber cloth: Insert the docking post 8 on the upper frame 7 through the fiber cloth and into the docking hole 9, so that the snap-fit groove 10 is docked with the snap-fit ring 11;

[0047] Step 3: Docking the frame 13: Place the upper frame 7 and the lower frame 6 in the sliding mounting frame 15, and connect the positioning bracket 14 with the positioning slot 5;

[0048] Step 4: Place the fiber cloth: Press the push-in frame 16 to push the upper frame 7 and the lower frame 6 into the lower mold 3 so that the lower frame 6 fits the lower mold 3;

[0049] Step 5: Spraying resin: The automated device sprays the resin onto the fiber cloth;

[0050] Step 6: Compression molding: The hydraulic device drives the mold top seat 2 to move downward, so that the upper mold 4 and the lower mold 3 are in contact with each other, the pressing groove 17 presses the upper frame 7, the upper frame 7 moves toward the lower frame 6, and the separating knife 12 contacts the lower frame 6.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing cover wet compression molding device, comprising a mold base (1) and a mold top seat (2), wherein the mold base (1) and the mold base (1) are fixedly mounted on the bottom and top of a hydraulic device, respectively, a lower mold (3) is provided on the mold base (1), an upper mold (4) is provided on the mold top seat (2), and the lower mold (3) and the upper mold (4) are matched, characterized in that: Also includes: A plurality of positioning slots (5) are provided, and the plurality of positioning slots (5) are opened on the mold base (1); A stretching frame mechanism is detachably connected to the lower mold (3), and the stretching frame mechanism is used to stretch and fix the fiber cloth; The press-butt joint mechanism is detachably connected to the positioning slot (5), and the press-butt joint mechanism is detachably connected to the stretching frame mechanism. The press-butt joint mechanism is used to dock the stretching frame mechanism with the lower mold (3).

2. The sealing cover wet compression molding device according to claim 1, characterized in that: The stretching frame mechanism comprises: A lower frame (6) is detachably connected to the lower mold (3) or the pressing docking mechanism; The upper frame (7) is detachably connected to the lower mold (3) or the pressing docking mechanism, and the lower frame (6) is detachably connected to the upper frame (7). When the upper frame (7) and the upper frame (7) are connected to each other, the fiber cloth is arranged between the upper frame (7) and the lower frame (6).

3. The sealing cover wet compression molding device according to claim 2, characterized in that: The upper frame (7) is provided with a plurality of docking posts (8), and the lower frame (6) is provided with a plurality of docking holes (9). The docking posts (8) and the docking holes (9) correspond one to one, and the docking posts (8) penetrate the fiber cloth and dock with the docking holes (9).

4. The sealing cover wet compression molding device according to claim 3, characterized in that: A snap-fit groove (10) is provided on a side of the docking column (8) away from the upper frame (7), and a plurality of snap-fit rings (11) are provided in the docking hole (9). The snap-fit groove (10) and the snap-fit rings (11) are detachably connected.

5. The sealing cover wet compression molding device according to claim 4, characterized in that: A separator knife (12) is fixedly connected to a side of the inner ring of the upper frame (7) close to the lower frame (6); when the clamping groove (10) is connected to the clamping ring (11) close to the upper frame (7) among the plurality of clamping rings (11), a gap is left between the separator knife (12) and the lower frame (6).

6. The sealing cover wet compression molding device according to claim 5, characterized in that: The pressing docking mechanism comprises: A frame body (13) is fixedly connected to a plurality of positioning brackets (14), and the positioning brackets (14) are detachably connected to the positioning slots (5); A sliding mounting frame (15) is fixedly connected to the frame (13); the sliding mounting frame (15) can contact the lower mold (3); the sliding mounting frame (15) cooperates with the lower mold (3); when the upper frame (7) and the lower frame (6) are in contact, the stretching frame mechanism can be detachably connected to the sliding mounting frame (15); A push-in frame (16) is slidably arranged in the sliding installation frame (15), and a plurality of springs are fixedly connected between the push-in frame (16) and the sliding installation frame (15). Pressing the push-in frame (16) can press the upper frame (7) and the lower frame (6) into the lower mold (3).

7. The sealing cover wet compression molding device according to claim 6, characterized in that: When the pushing frame (16) presses the upper frame (7) into the lower mold (3), a gap exists between the separating knife (12) and the lower frame (6).

8. The sealing cover wet compression molding device according to claim 7, characterized in that: The upper mold (4) is provided with a pressing groove (17) corresponding to the upper frame (7). When the upper mold (4) and the lower mold (3) press the fiber cloth, the pressing groove (17) and the lower mold (3) press the upper frame (7) and the lower frame (6). At this time, the clamping groove (10) is connected to the clamping ring (11) away from the upper frame (7), and the separating knife (12) is in contact with the lower frame (6).

9. The sealing cover wet compression molding device according to claim 8, characterized in that: Before the compression molding is performed, a release agent needs to be sprayed on the upper mold (4), the lower mold (3), the upper frame (7) and the lower frame (6).

10. A sealing cover wet compression molding process, using the sealing cover wet compression molding device according to claim 9, characterized in that: The following steps are involved: S1, spraying a release agent: spraying a release agent on the upper frame (7), the lower frame (6), the upper mold (4) and the lower mold (3); S2, fiber cloth installation: the docking column (8) on the upper frame (7) is passed through the fiber cloth and then extended into the docking hole (9), and the clamping groove (10) is docked with the clamping ring (11); S3, docking the frame (13): placing the upper frame (7) and the lower frame (6) in the sliding installation frame (15), and docking the positioning bracket (14) with the positioning slot (5); S4, fiber cloth placement: press the push-in frame (16), push the upper frame (7) and the lower frame (6) into the lower mold (3), so that the lower frame (6) and the lower mold (3) fit together, and remove the frame (13); S5. Spraying resin: The automated device sprays the resin onto the fiber cloth; S6. Compression molding: The hydraulic device drives the mold top seat (2) to move downward, so that the upper mold (4) and the lower mold (3) are in contact with each other, the pressing groove (17) presses the upper frame (7), the upper frame (7) moves toward the lower frame (6), and the separating knife (12) contacts the lower frame (6).

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