Forming die of boron carbide ceramic water scraping element

Abstract

The utility model discloses a forming die of a boron carbide ceramic water scraping element in the technical field of dies. The mold comprises a bottom mold body, a front side mold body, a rear side mold body, a left side mold body, a right side mold body and a top mold body, a pouring cavity is defined by the bottom mold body, the front side mold body, the rear side mold body, the left side mold body, the right side mold body and the top mold body, the top mold body is provided with a pouring hole communicated with the pouring cavity, and a mold core is arranged in the pouring cavity and arranged on the bottom mold body and extends in the length direction of the bottom mold body; boron carbide ceramic slurry is injected into the pouring cavity, a water scraping element is obtained after the boron carbide ceramic slurry is cured, the water scraping element is provided with a mounting groove, and the shape of the mold core is matched with that of the mounting groove; the mold core comprises an upper mold core and a lower mold core, the upper mold core is placed above the lower mold core, a first positioning piece is arranged between the upper mold core and the lower mold core, a second positioning piece is arranged between the lower mold core and the bottom mold, the upper mold core and the front side mold are fixed into a whole, and the lower mold core and the rear side mold are fixed into a whole. The mold has the advantage of convenience in demolding.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding mold for a boron carbide ceramic wiper element. Background Technology

[0002] Currently, the squeegee elements used on papermaking machines are generally ceramic squeegees. These ceramic squeegees are long strips that are then bonded side-by-side to high-strength fiberglass. The production of ceramic squeegees involves a slurry injection process, in which ceramic slurry is injected into a mold for molding. However, due to the complex structure of some squeegee elements and their mostly long strip shape, the ceramic squeegees adhere tightly to the inner wall of the mold during demolding, making demolding difficult. Utility Model Content

[0003] The purpose of this invention is to provide a molding die for a boron carbide ceramic wiper element that is easy to demold.

[0004] To achieve the above-mentioned objectives, the molding die for the boron carbide ceramic wiper element of this utility model adopts the following technical solution:

[0005] A molding die for a boron carbide ceramic wiper element includes a bottom mold, a front mold, a rear mold, a left mold, a right mold, and a top mold. The bottom mold, front mold, rear mold, left mold, right mold, and top mold surround and form a casting chamber. The top mold has a casting hole that connects to the casting chamber. A mold core is provided inside the casting chamber, and the mold core is disposed on the bottom mold and extends along the length of the bottom mold. Boron carbide ceramic slurry is injected into the casting chamber. After the boron carbide ceramic slurry solidifies, the wiper element is obtained. The water element is provided with an installation groove, and the shape of the mold core is adapted to the installation groove; the mold core includes an upper mold core and a lower mold core, the upper mold core is placed above the lower mold core, a first positioning element is provided between the upper mold core and the lower mold core, a second positioning element is provided between the lower mold core and the bottom mold, the upper mold core is fixed to the front mold, and the lower mold core is fixed to the rear mold; both the front mold and the rear mold are provided with forming columns, and the two ends of the wiper element are respectively provided with grooves, and the shape of the forming column is adapted to the grooves.

[0006] Preferably, the top of the upper mold core has two symmetrical inclined surfaces, with the abutting end of the two inclined surfaces being the higher inclined end. The bottom edge of the upper mold core has a limiting strip, forming a groove between the limiting strip and the lower mold core. The upper section of the lower mold core has two vertical planes on both sides, while the lower section has two inclined planes on both sides. The two inclined planes are symmetrically arranged. The width of the bottom of the lower mold core is greater than the width of the upper end. Dividing the mold core into an upper mold core and a lower mold core allows for segmented demolding of the inner wall of the squeegee element during demolding, reducing the difficulty of demolding.

[0007] Preferably, the front mold and the rear mold are in contact with the end faces of the bottom mold; both ends of the bottom mold are provided with a first step structure, and both the left mold and the right mold are provided with a second step structure adapted to the first step structure, with the first step structure and the second step structure in contact. The assembly positions of the left mold and the right mold are positioned by the provision of the first step structure and the second step structure.

[0008] Preferably, the bottom mold is provided with a vertically arranged fixing rod, which can be detachably installed on the bottom mold; both the left and right molds are provided with a first fixing hole to facilitate the insertion of the fixing rod, and the top mold is provided with a second fixing hole to facilitate the insertion of the fixing rod. After the fixing rod passes through the first fixing hole and the second fixing hole, it is locked by a nut.

[0009] Preferably, the bottom mold has a threaded hole, and the lower end of the fixing rod has an external thread for inserting a threaded hole. The external thread at the lower end of the fixing rod mates with the threaded hole on the bottom mold, thus the fixing rod can be detachably installed on the bottom mold.

[0010] Preferably, the front mold and the rear mold are each provided with a third fixing hole, and the left mold and the right mold are each provided with a fourth fixing hole. Fasteners are inserted through the third fixing hole and the fourth fixing hole for locking.

[0011] Preferably, the first positioning element includes a first protrusion on the lower mold core, and the bottom of the upper mold core is provided with a first positioning groove that adapts to the first protrusion. The first protrusion has a semi-circular cross-section and extends along the length direction of the lower mold core. The first protrusion defines the position of the upper mold core on the lower mold core, facilitating the installation of the upper mold core.

[0012] Preferably, the second positioning element includes a second protrusion on the bottom mold, and the bottom of the lower mold core is provided with a second positioning groove that adapts to the second protrusion. The second protrusion has a semi-circular cross-section and extends along the length of the bottom mold. The second protrusion defines the position of the lower mold core on the bottom mold, facilitating the installation of the lower mold core.

[0013] Preferably, the two sides of the top mold extend beyond the left and right molds, respectively.

[0014] Preferably, the inner surfaces of the bottom mold, front side mold, rear side mold, left side mold, right side mold, and top mold, as well as the outer surface of the mold core, are all provided with micron-sized slots. The micron-sized slots facilitate demolding.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The casting chamber of this invention is formed by a top mold, a front mold, a rear mold, a left mold, a right mold, and a bottom mold. During demolding, each surface of the outer wall of the wiper element is demolded separately, reducing the difficulty of demolding. At the same time, the mold core is divided into an upper mold core and a lower mold core. The upper mold core is fixed to the front mold, and the lower mold core is fixed to the rear mold. Therefore, while demolding the end face of the wiper element, the inner wall of the wiper element is also demolded in sections, further reducing the difficulty of demolding. The structure is simple, easy to use, and practical. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the mold assembly structure of this utility model;

[0018] Figure 2 This is a perspective view of the present invention in its demolded state;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 This is a cross-sectional view of the mold core;

[0021] Figure 5 This is a 3D view of the wiper element.

[0022] The components include: 1. Top mold; 2. Rear mold; 3. Bottom mold; 3a. Threaded hole; 4. Right side mold; 5. Front mold; 6. Fastener; 7. Nut; 8. Casting hole; 9. Left side mold; 10. First fixing hole; 11. Second fixing hole; 12. Fixing rod; 13. Squeegee element; 13a. Groove; 13b. Mounting groove; 14. Lower mold core; 14a. Second positioning groove; 15. Third fixing hole; 16. Forming column; 17. Fourth fixing hole; 18. Upper mold core; 18a. Inclined surface; 18b. Limiting strip; 18c. First positioning groove; 19. First step structure; 20. Second step structure; 21. Casting chamber; 22. Second protrusion; 23. First protrusion; 24. Slot. Detailed Implementation

[0023] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0024] like Figure 1-5As shown, a molding die for a boron carbide ceramic wiper element includes a bottom mold 3, a front mold 5, a rear mold 2, a left mold 9, a right mold 4, and a top mold 1. The front mold 5 and the rear mold 2 are in contact with the end faces of the bottom mold 3, and the two side edges of the top mold 1 extend beyond the left mold 9 and the right mold 4, respectively. Both ends of the bottom mold are provided with a first step structure 19, and the left mold 9 and the right mold 4 are provided with a second step structure 20 adapted to the first step structure 19. The first step structure 19 and the second step structure 20 are in contact with each other. The bottom mold 3 is provided with a vertically arranged fixing rod 12, which can be detachably installed on the bottom mold 3. The bottom mold 3 is provided with a threaded hole 3a, and the lower end of the fixing rod 12 is provided with an external thread for inserting into the threaded hole 3a. The left mold 9 and right mold 4 are each provided with a first fixing hole 10 for easy insertion of the fixing rod 12, and the top mold 1 is provided with a second fixing hole 11 for easy insertion of the fixing rod 12. After the fixing rod 12 passes through the first fixing hole 10 and the second fixing hole 11, it is locked by a nut 7. The front mold 5 and rear mold 2 are each provided with a third fixing hole 15, and the left mold 9 and right mold 4 are provided with a fourth fixing hole 17. Fasteners 6 are inserted into the third fixing hole 15 and the fourth fixing hole 17 for locking. The bottom mold 3, the front mold 5, the rear mold 2, the left mold 9, the right mold 4 and the top mold 1 surround to form a casting chamber 21. The top mold 1 is provided with a casting hole 8 that connects to the casting chamber 21. The casting chamber 21 is provided with a mold core. A boron carbide ceramic slurry is injected into the casting chamber 21 and, after curing, a scraper element 13 is obtained. The scraper element 13 is provided with a mounting groove 13b, and the shape of the mold core is adapted to the mounting groove 13b. The inner surfaces of the bottom mold, front side mold, rear side mold, left side mold, right side mold, and top mold, as well as the outer surface of the mold core, are all provided with micron-sized slots. The mold core includes an upper mold core 18 and a lower mold core 14. The upper mold core 18 is placed above the lower mold core 14. A first positioning element is provided between the upper mold core 18 and the lower mold core 14, and a second positioning element is provided between the lower mold core 14 and the bottom mold 3. The first positioning element includes a first protrusion 23 provided on the lower mold core 14. The bottom of the mold core 18 is provided with a first positioning groove 18c that adapts to the first protrusion 23. The first protrusion 23 has a semi-circular cross section and extends along the length direction of the lower mold core 14. The second positioning element includes a second protrusion 22 provided on the bottom mold 3. The bottom of the lower mold core 14 is provided with a second positioning groove 14a that adapts to the second protrusion 22. The second protrusion 22 has a semi-circular cross section and extends along the length direction of the bottom mold 3. The upper mold core 18 is fixed to the front mold 5, and the lower mold core 14 is fixed to the rear mold 2. Both the front mold 5 and the rear mold 2 are provided with forming pillars 16. The two ends of the wiper element 13 are respectively provided with grooves 13a, and the shape of the forming pillar 16 is adapted to the grooves 13a.The upper mold core 18 has two symmetrical inclined surfaces 18a at its top, with the higher inclined end of the two inclined surfaces 18a being joined together. A limiting strip 18b is provided at the bottom edge of the upper mold core 18, forming a groove 24 between the limiting strip 18b and the lower mold core 14. The upper two side walls of the lower mold core 14 are vertical planes, while the lower two side walls are inclined planes. The two inclined planes are symmetrically arranged. The width of the bottom of the lower mold core 14 is greater than the width of its upper end.

[0025] The specific working process and principle of this utility model are as follows: During mold assembly, firstly, a fixing rod 12 is installed on the bottom mold 3. Then, the left mold 9 and the right mold 4 are inserted onto the fixing rod 12. Next, the lower mold core 14 is placed on the bottom mold 3. Under the action of the second protrusion 22, the lower mold core 14 is positioned. At the same time as the lower mold core 14 is placed, the rear mold 2 contacts the end face of the bottom mold 3. Then, the upper mold core 18 is placed on the lower mold core 14. Under the action of the first protrusion 23, the upper mold core 18 is positioned. At the same time as the upper mold core 18 is placed, the front mold 5 contacts the other end face of the bottom mold 3. Finally, the top mold 1 is placed, and the fixing rod 12 is inserted into the top mold 1. At this point, a nut 7 is installed on the fixing rod 12 for locking, which fixes the top mold 1, left mold 9, right mold 4 and bottom mold 3 into one piece. At the same time, a fastener 6 is installed on the front mold 5. The fastener 6 passes through the third fixing hole 15 of the front mold 5 and then enters the fourth fixing hole 17 of the left and right molds 4 to lock, thus fixing the front mold 5 with the left and right molds into one piece. Similarly, fasteners 6 are installed on the rear mold 2 to fix the rear mold 2 with the left and right molds into one piece, thus completing the assembly of the mold. After the mold is assembled, boron carbide ceramic slurry is injected through the pouring hole 8. After cooling, it forms a scraper element 13, which can then be demolded.

[0026] During demolding, the inner and outer walls of the wiper element 13 are demolded in sections. Specifically, first, the fastener 6 is removed, and the front mold 5 is disassembled from the left and right molds 4, and the rear mold 2 is disassembled from the left and right molds 4. At the same time, the nut 7 is removed from the fixing rod 12, and the fixing rod 12 is rotated to remove the lower end of the fixing rod 12 from the threaded hole 3a of the bottom mold 3. After removing the fixing rod 12, the top mold 1, the left mold 9, and the right mold 4 are disassembled in sequence, and then the front mold 5 is disassembled. While the front mold 5 is being disassembled, the upper mold core 18 is pulled out from the mounting groove 13b of the wiper element 13. The rear mold 2 is then disassembled. While the rear mold 2 is being disassembled, the lower mold core 14 is pulled out from the mounting groove 13b of the wiper element 13. Finally, the wiper element 13 is easily separated from the bottom mold 3.

[0027] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A molding die for a boron carbide ceramic wiper element, characterized in that: The system includes a bottom mold, a front mold, a rear mold, a left mold, a right mold, and a top mold. These molds enclose a casting chamber. The top mold has a pouring hole connecting to the casting chamber. A mold core is located within the casting chamber, positioned on the bottom mold and extending along its length. Boron carbide ceramic slurry is injected into the casting chamber. After solidification, the boron carbide ceramic slurry forms a squeegee element. The squeegee element has a mounting groove, and the shape of the mold core matches the mounting groove. The mold core includes an upper mold core and a lower mold core, with the upper mold core positioned above the lower mold core. A first positioning element is provided between the upper and lower mold cores, and a second positioning element is provided between the lower mold core and the bottom mold. The upper mold core is fixed integrally with the front mold, and the lower mold core is fixed integrally with the rear mold. Both the front and rear molds have forming pillars, and the two ends of the squeegee element have grooves, with the shape of the forming pillars matching the grooves.

2. The molding die for the boron carbide ceramic wiper element according to claim 1, characterized in that: The top of the upper mold core has two symmetrical inclined surfaces, and the joint end of the two inclined surfaces is the higher inclined end. The bottom edge of the upper mold core has a limiting strip, and the limiting strip forms a groove with the lower mold core. The two side walls of the upper section of the lower mold core are vertical planes, and the two side walls of the lower section of the lower mold core are inclined planes. The two inclined planes are arranged symmetrically. The width of the bottom of the lower mold core is greater than the width of the upper end of the lower mold core.

3. The molding die for the boron carbide ceramic wiper element according to claim 1, characterized in that: The front mold and the rear mold are in contact with the end face of the bottom mold respectively; both ends of the bottom mold are provided with a first step structure, and the left mold and the right mold are provided with a second step structure adapted to the first step structure, and the first step structure and the second step structure are in contact with each other.

4. The molding die for the boron carbide ceramic wiper element according to claim 3, characterized in that: The bottom mold is provided with vertically arranged fixing rods, which can be detachably installed on the bottom mold; the left and right molds are provided with first fixing holes to facilitate the insertion of fixing rods, and the top mold is provided with second fixing holes to facilitate the insertion of fixing rods. After the fixing rods pass through the first and second fixing holes, they are locked with nuts.

5. The molding die for the boron carbide ceramic wiper element according to claim 4, characterized in that: The bottom mold is provided with a threaded hole, and the lower end of the fixing rod is provided with an external thread for inserting a threaded hole.

6. The molding die for the boron carbide ceramic wiper element according to claim 3, characterized in that: Both the front and rear molds are provided with a third fixing hole, and both the left and right molds are provided with a fourth fixing hole. Fasteners are inserted through the third and fourth fixing holes for locking.

7. The molding die for the boron carbide ceramic wiper element according to claim 1, characterized in that: The first positioning element includes a first protrusion on the lower mold core, and the bottom of the upper mold core is provided with a first positioning groove that adapts to the first protrusion. The cross-section of the first protrusion is semi-circular, and the first protrusion extends along the length direction of the lower mold core.

8. The molding die for the boron carbide ceramic wiper element according to claim 1, characterized in that: The second positioning element includes a second protrusion on the bottom mold, and the bottom of the lower mold core is provided with a second positioning groove that adapts to the second protrusion. The cross-section of the second protrusion is semi-circular, and the second protrusion extends along the length direction of the bottom mold.

9. The molding die for the boron carbide ceramic wiper element according to claim 1, characterized in that: The two sides of the top mold extend beyond the left and right molds, respectively.

10. The molding die for the boron carbide ceramic wiper element according to claim 1, characterized in that: The inner surfaces of the bottom mold, front mold, rear mold, left mold, right mold, and top mold, as well as the outer surface of the mold core, are all provided with micron-sized slots.

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