Ceramic slurry injection molding apparatus and method based on ceramic wedge blank

Abstract

The application provides a ceramic slurry injection molding device and method based on a ceramic wedge blank, belongs to the technical field of ceramic product molding, and comprises a rack, a top die, a hydraulic cylinder and a bottom die. A plurality of steel needles are slidably connected in the top die, and a first air cylinder is arranged on the top die. A plurality of concave cavities are formed in the bottom die, and an embryo membrane is slidably connected in each concave cavity. The inner cavity bottom end of each embryo membrane is in communication with the concave cavity where the embryo membrane is located. A piston disc is slidably connected in the piston cavity formed in the middle of the bottom die. A plurality of through holes are formed in the inner wall of the piston cavity. A gas guide hole is formed in each embryo membrane. A gas supply hole is formed in the inner wall of the piston cavity. A plurality of locking holes are formed in the inner wall of the piston cavity. A locking pin is slidably connected to each embryo membrane through an elastic element. A spring pin is arranged in each locking hole. The application can reduce the difficulty of demolding and the probability of fracture of the ceramic wedge.

Description

Technical Field

[0001] This application relates to the field of ceramic product molding technology, specifically to a ceramic slurry injection molding apparatus and method based on ceramic cleaver blanks. Background Technology

[0002] In semiconductor manufacturing, chips need to be connected to circuit boards; this process is called packaging. In this process, a wire bonding method using a die is used to connect the chip and the circuit board. During packaging, the connection between the chip and the circuit board relies on gold wires, and the die assists in soldering the gold wires onto the chip and the circuit board. Because the die requires high wear resistance and strength in practical use, tungsten carbide is usually used as the raw material for its production. However, due to the high difficulty and cost of processing tungsten carbide, ceramic materials are gradually being replaced as the raw material for die manufacturing.

[0003] Ceramic chopping tools, as axisymmetric ceramic tools with vertically oriented holes, belong to the category of precision microstructured ceramic components. Therefore, their production is generally accomplished through slip injection molding. (Refer to...) Figure 3 In order to improve the molding efficiency of ceramic chopping cutter 8, multiple ceramic chopping cutters 8 are often injection molded in one slurry injection process. At the same time, in order to facilitate the picking action during unloading, the support plate 9 that can connect multiple ceramic chopping cutters 8 is also molded together during slurry injection.

[0004] Referring to the above technical solution, since the ceramic cleaver itself is small in size, in order to reduce the probability of the cleaver being damaged and scrapped in the later drilling process, the inner hole direct molding method will be selected during slurry injection molding. However, due to the slender shape and small size of the ceramic cleaver, even with the participation of the support plate, the molded ceramic cleaver still has the problem of difficult demolding, and the ceramic cleaver may break in the mold during the demolding process. Summary of the Invention

[0005] In view of this, this application provides a ceramic slurry injection molding apparatus and method based on ceramic cleaver blanks, mainly used to solve the problems of difficult demolding and easy breakage of ceramic cleavers in the mold during demolding.

[0006] To address the aforementioned technical problems, this application provides a ceramic slurry injection molding apparatus and method based on ceramic cleaver blanks.

[0007] In a first aspect, this application provides a ceramic slurry injection molding apparatus based on a ceramic cleaver blank, comprising a frame, a top mold, a hydraulic cylinder, and a bottom mold; the top mold has multiple steel needles slidably connected inside, matching the inner holes of the ceramic cleaver, and a first cylinder for driving the steel needles to rise and fall on the top mold; the bottom mold has multiple cavities, each cavity having a blank slidably connected inside, and the bottom end of the inner cavity of each blank communicating with its own cavity; a piston disk is slidably connected to a piston cavity in the middle of the bottom mold, and the inner wall of the piston cavity has multiple through holes corresponding to and communicating with the cavities; each blank has an air guide hole matching the through holes; the inner wall of the piston cavity has an air supply hole higher than the piston disk; the inner wall of the piston cavity has multiple locking holes corresponding to and communicating with the cavities; each blank has a locking pin slidably connected to it via an elastic element, capable of being inserted into the locking hole; and each locking hole has a spring pin capable of pushing the locking pin out of the locking hole when the piston disk moves downward.

[0008] By adopting the above technical solution, using steel needles as the inner hole forming mold for ceramic chopping knives can provide guiding support when the ceramic chopping knives are ejected. Furthermore, when using air pressure ejection to assist in the demolding of ceramic chopping knives, it can effectively seal the inner hole of the ceramic chopping knives, which is beneficial to the demolding work of ceramic chopping knives.

[0009] Optionally, the locking pin consists of a circular frame slidably connected to the embryo membrane and a ball rotatably connected inside the circular frame.

[0010] By adopting the above technical solution, when using a ball as the insertion and mating part of the locking hole, the frictional damage to the cavity can be reduced during the assembly process of the embryo and the cavity.

[0011] Optionally, the diameter of the ball is greater than or equal to the diameter of the through hole, and the diameter of the annular frame is greater than the diameter of the through hole.

[0012] By adopting the above technical solution, after the embryonic membrane rises a certain distance, it can be restricted a second time to prevent the embryonic membrane from continuing to rise under the action of compressed air, so as to prevent the compressed air from directly pushing the embryonic membrane away.

[0013] Optionally, a return spring is provided inside the piston chamber to move the piston disc upward and reset it when the pressure inside the piston chamber returns to normal.

[0014] By adopting the above technical solution, when the piston cavity returns to normal pressure, the elastic potential energy of the return spring can be used to move the piston disc upward and reset it, so that the next demolding operation can be carried out.

[0015] Optionally, a second cylinder is provided inside the frame, and the actuating end of the second cylinder is provided with an ejector that penetrates the bottom mold and the piston disc.

[0016] By adopting the above technical solution, during the demolding process, when the second cylinder, in conjunction with the introduction of compressed gas, moves the ejector upward, it can lift the support plate upward, further reducing the difficulty of the demolding work.

[0017] Secondly, this application provides a ceramic slurry injection molding method based on a ceramic cleaver blank, applied to the ceramic slurry injection molding apparatus based on a ceramic cleaver blank described in the first aspect, wherein the injection molding method includes: S1, through the cooperation of hydraulic cylinder and first cylinder, the top mold, bottom mold and steel pin are combined to form a complete mold cavity, and then the ceramic slurry is injected into the mold cavity with the help of external injection equipment; S2, after the ceramic slurry is formed, the hydraulic cylinder drives the top mold and steel needle to move upward to complete the mold opening, and then the first cylinder moves the steel needle downward again to insert and seal the inner hole of the ceramic chopping knife; S3, the external air pump injects compressed air into the piston chamber through the air supply hole, and then the compressed air enters the blank through the through hole, air guide hole and concave cavity in sequence, causing the whole composed of multiple ceramic chopping blades and bearing plate to be removed from the bottom mold and blank.

[0018] By adopting the above technical solution, the ceramic cleaver can be ejected by air pressure, thereby providing assistance for the demolding of the ceramic cleaver and reducing the demolding difficulty to a certain extent.

[0019] Optionally, in S3, if a ceramic chopping knife breaks inside the preform after the entire assembly of multiple ceramic chopping knives and the support plate is dislodged, the steel needle is re-entered into the preform by the cooperation of the first cylinder and inserted into the inner hole of the broken ceramic chopping knife. Then, the external air pump continuously supplies air to blow the broken ceramic chopping knife out of the preform along the steel needle.

[0020] Optionally, in S3, when the ceramic chopping tool broken inside the blank is tightly connected to the blank and cannot be blown out, as compressed air continues to flow in, the piston disc will move down to the lowest point of the piston chamber. Through the cooperation of the spring pin, the locking pin will be pushed out of the locking hole to release the position lock of the blank. Then, under the action of compressed air, the blank will be pushed out of the cavity. Finally, personnel will remove the blank and clean the broken ceramic chopping tool inside.

[0021] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. Using air pressure ejection to assist in the demolding of ceramic cleavers reduces the difficulty of demolding and lowers the probability of ceramic cleaver breakage. Furthermore, when ceramic cleavers break inside the preform, the broken part or the preform containing the broken part can be removed in time to prevent subsequent ceramic cleaver forming work from being affected and difficult to carry out quickly.

[0022] 2. The use of ball-type plug-in fittings as locking components for the preform can reduce frictional damage to the cavity during the assembly process of the preform and the cavity, so as to prevent frictional indentations from appearing on the inner wall of the cavity during long-term use, which would affect the fit between the cavity and the preform and reduce the probability of compressed gas leakage affecting the gas pressure ejection operation.

[0023] 3. After the embryonic membrane rises a certain distance, it can prevent the embryonic membrane from continuing to rise under the action of compressed air, so as to avoid the compressed air directly blowing the embryonic membrane away and increasing additional loss costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the ceramic slurry injection molding device based on ceramic cleaver blanks in this application. Figure 2 For this application Figure 1 A magnified view of a portion of region A in the middle; Figure 3 This is an exploded view of the top mold and bottom mold of this application; Figure 4 This is a sectional view of the bottom mold of this application; Figure 5 For this application Figure 4 A magnified view of a portion of region B in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Top mold; 12. Hydraulic cylinder; 13. Bottom mold; 2. Steel needle; 21. First cylinder; 3. Cavity; 4. Blank; 41. Air guide hole; 5. Piston chamber; 51. Piston disc; 52. Through hole; 53. Air supply hole; 54. Return spring; 6. Locking hole; 61. Elastic element; 62. Locking pin; 621. Circular frame; 622. Ball; 63. Spring pin; 7. Second cylinder; 71. Ejector; 8. Ceramic cleaver; 9. Bearing plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will be combined with the embodiments of this application. Figures 1-5 The technical solutions of the embodiments of this application are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this application are within the scope of protection of this application.

[0027] In the first aspect, this application provides a ceramic slurry injection molding apparatus based on ceramic cleaver blanks, adopting the following technical solution: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This embodiment provides a ceramic slurry injection molding device based on ceramic cleaver blanks, including a frame 1, a top mold 11 slidably connected to the frame 1, a hydraulic cylinder 12 for driving the top mold 11 to rise and fall on the frame 1, and a bottom mold 13 vertically corresponding to the top mold 11 on the frame 1.

[0028] Multiple steel needles 2 that match the inner hole of the ceramic chopping knife 8 are slidably connected inside the top mold 11, and a first cylinder 21 for driving the steel needles 2 to rise and fall is provided on the top mold 11.

[0029] The bottom mold 13 has multiple recesses 3, each recess 3 is slidably connected to a embryo 4, and the bottom of the inner cavity of each embryo 4 is connected to the recess 3 in which it is located. A piston disk 51 is slidably connected to a piston cavity 5 in the middle of the bottom mold 13, and the inner wall of the piston cavity 5 has multiple through holes 52 that correspond one-to-one with and are connected to the recesses 3. Each embryo 4 has an air guide hole 41 that matches the through hole 52. The inner wall of the piston cavity 5 has an air supply hole 53 that is higher than the piston disk 51.

[0030] The inner wall of the piston chamber 5 is provided with a plurality of locking holes 6 that correspond one-to-one with and communicate with the concave cavity 3. The embryo 4 is slidably connected with locking pins 62 that can be inserted into the locking holes 6 via elastic elements 61, and each locking hole 6 is provided with a spring pin 63 that can push the locking pin 62 out of the locking hole 6 when the piston disc 51 moves down.

[0031] When performing the injection molding of the ceramic cleaver 8, the top mold 11, bottom mold 13 and steel needle 2 are combined to form a complete mold cavity through the cooperation of the hydraulic cylinder 12 and the first air cylinder 21. Then, the ceramic slurry is injected into the mold cavity by the external slurry injection equipment. After the ceramic slurry is formed, the hydraulic cylinder 12 drives the top mold 11 and steel needle 2 to move upward to complete the initial mold opening.

[0032] Subsequently, the first cylinder 21 drives the steel needle 2 to move down again until the steel needle 2 inserts and blocks the inner hole of the ceramic chopping knife 8. At this time, compressed air is injected into the piston chamber 5 through the air supply hole 53 by an external air pump. Then, the compressed air enters the preform 4 through the through hole 52, the air guide hole 41 and the concave cavity 3 in sequence, causing the whole composed of multiple ceramic chopping knives 8 and the support plate 9 to be ejected from the bottom mold 13 and the preform 4. The steel needle 2 can provide guidance and support for the ceramic chopping knife 8 when it is ejected. The ejection of the ceramic chopping knife 8 by air pressure assists in the demolding work, reducing the demolding difficulty and the probability of the ceramic chopping knife 8 breaking.

[0033] Furthermore, when the initial demolding work is completed by the combination of multiple ceramic chopping blades 8 and the support plate 9, if some of the ceramic chopping blades 8 on the support plate 9 break inside the preform 4, the first cylinder 21 can drive the steel needle 2 to move down into the preform 4 again, so that the steel needle 2 is inserted into and blocked in the inner hole of the broken ceramic chopping blade 8. Then, the external air pump can continuously supply air to blow the broken ceramic chopping blade 8 out of the preform 4 along the steel needle 2.

[0034] If the broken ceramic chopping blade 8 is tightly connected to the blank 4 and cannot be blown out normally by compressed air, since the inner hole of the broken ceramic chopping blade 8 has been blocked by the steel needle 2, as the compressed air continues to flow in, the compressed air will force the piston disc 51 to gradually move down to the lowest point of the inner cavity of the piston chamber 5. Under the squeezing action of the bottom conical surface of the piston disc 51, the spring pin 63 will retract into the locking hole 6 and push the locking pin 62 out of the locking hole 6, thereby releasing the position lock of the blank 4. Then, the blank 4 will be pushed out of the cavity 3 under the action of compressed air. Finally, the personnel can remove the blank 4 to clean the broken ceramic chopping blade 8 inside.

[0035] Reference Figure 4 and Figure 5 The locking pin 62 consists of a circular frame 621 that is slidably connected to the embryonic membrane 4 and a ball 622 that is rotatably connected inside the circular frame 621.

[0036] When the ball 622 is used as the insertion and mating part of the locking hole 6, the friction damage to the cavity 3 can be reduced during the assembly process of the preform 4 and the cavity 3, so as to prevent friction marks from appearing on the inner wall of the cavity 3 during long-term use, which would affect the fit between itself and the preform 4, and reduce the probability that the compressed gas leakage will affect the gas pressure ejection operation.

[0037] Reference Figure 4 and Figure 5 The diameter of the ball 622 is greater than or equal to the diameter of the through hole 52, and the diameter of the ring frame 621 is greater than the diameter of the through hole 52.

[0038] After the embryonic membrane 4 rises a certain distance and the rolling ball 622 aligns with the through hole 52, the ring frame 621 and the rolling ball 622 will move closer to the through hole 52 under the action of the elastic element 61 until the rolling ball 622 blocks the through hole 52 and stops the passage of compressed gas, preventing the embryonic membrane 4 from continuing to rise under the action of compressed air, so as to prevent the compressed air from directly pushing the embryonic membrane 4 away.

[0039] Reference Figure 4 A reset spring 54 is provided inside the piston chamber 5 to move the piston disc 51 upward and reset it when the pressure inside the piston chamber 5 returns to normal.

[0040] When the pressure inside the piston chamber 5 returns to normal, the elastic potential energy of the return spring 54 can be used to move the piston disc 51 upward and reset it so that the next demolding operation can be carried out.

[0041] Reference Figure 1 and Figure 4 The machine frame 1 is equipped with a second cylinder 7, and the actuator of the second cylinder 7 is equipped with an ejector 71 that penetrates the bottom mold 13 and the piston disc 51.

[0042] During the demolding process, when the second cylinder 7, in conjunction with the introduction of compressed gas, moves the ejector 71 upward, it can lift the support plate 9 upward, further reducing the difficulty of the demolding work.

[0043] The implementation principle of the ceramic slurry injection molding device based on ceramic cleaver blanks in this application embodiment is as follows: Secondly, this application provides a ceramic slurry injection molding method based on a ceramic cleaver blank, applied to the ceramic slurry injection molding apparatus based on a ceramic cleaver blank in the first aspect, wherein the injection molding method includes: S1, the top mold 11, bottom mold 13 and steel needle 2 are combined to form a complete mold cavity by the cooperation of hydraulic cylinder 12 and first air cylinder 21, and then ceramic slurry is injected into the mold cavity with the help of external slurry injection equipment; S2, after the ceramic slurry is formed, the hydraulic cylinder 12 drives the top mold 11 and the steel needle 2 to move upward to complete the mold opening, and then the first cylinder 21 moves the steel needle 2 downward again to insert and block the inner hole of the ceramic chopping knife 8. S3, the external air pump injects compressed air into the piston chamber 5 through the air supply hole 53, and then the compressed air enters the preform 4 through the through hole 52, the air guide hole 41 and the concave cavity 3 in sequence, causing the whole composed of multiple ceramic chopping blades 8 and the support plate 9 to be removed from the bottom mold 13 and the preform 4.

[0044] In S3, after the entire assembly of multiple ceramic chopping blades 8 and the bearing plate 9 is dislodged, if the ceramic chopping blade 8 breaks inside the blank 4, the steel needle 2 is re-entered into the blank 4 by the cooperation of the first cylinder 21 and inserted into the inner hole of the broken ceramic chopping blade 8. Then, the external air pump continuously supplies air to blow the broken ceramic chopping blade 8 out of the blank 4 along the steel needle 2.

[0045] In S3, when the ceramic chopping knife 8, which is broken inside the embryo 4, is tightly connected to the embryo 4 and cannot be blown out, as compressed air continues to flow in, the piston disc 51 will move down to the lowest point of the piston chamber 5. With the cooperation of the spring pin 63, the locking pin 62 will be pushed out of the locking hole 6, thereby releasing the position lock of the embryo 4. Then, under the action of compressed air, the embryo 4 will be pushed out of the concave cavity 3. Finally, the embryo 4 will be removed by personnel and the broken ceramic chopping knife 8 inside will be cleaned.

[0046] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A ceramic slurry injection molding device based on ceramic cleaver blanks, comprising a frame (1), a top mold (11), a hydraulic cylinder (12), and a bottom mold (13), characterized in that: The top mold (11) has multiple steel needles (2) that match the inner hole of the ceramic chopper (8) in a sliding connection, and the top mold (11) is provided with a first cylinder (21) for driving the steel needles (2) to rise and fall. The bottom mold (13) has multiple recesses (3), each recess (3) is slidably connected to a embryonic membrane (4), and the bottom of the inner cavity of each embryonic membrane (4) is connected to the recess (3) in which it is located. A piston disk (51) is slidably connected to a piston cavity (5) in the middle of the bottom mold (13), and multiple through holes (52) corresponding to and connected to the recesses (3) are opened on the inner wall of the piston cavity (5). Each embryonic membrane (4) is provided with an air guide hole (41) matching the through hole (52). An air supply hole (53) higher than the piston disk (51) is opened on the inner wall of the piston cavity (5). The piston chamber (5) has multiple locking holes (6) that correspond one-to-one with and communicate with the recess (3). The embryo (4) is slidably connected to a locking pin (62) that can be inserted into the locking hole (6) by an elastic element (61). Each locking hole (6) is provided with a spring pin (63) that can push the locking pin (62) out of the locking hole (6) when the piston disc (51) moves down.

2. The ceramic paste injection molding apparatus based on a ceramic wedge blank according to claim 1, characterized in that: The locking pin (62) consists of a circular frame (621) slidably connected to the embryonic membrane (4) and a ball (622) rotatably connected inside the circular frame (621).

3. The ceramic slurry injection molding apparatus based on ceramic cleaver blanks according to claim 2, characterized in that: The diameter of the ball (622) is greater than or equal to the diameter of the through hole (52), and the diameter of the ring frame (621) is greater than the diameter of the through hole (52).

4. The ceramic slurry injection molding device based on ceramic cleaver blanks according to claim 1, characterized in that: A reset spring (54) is provided inside the piston chamber (5) to move the piston disc (51) upward and reset when the pressure inside the piston chamber (5) returns to normal.

5. The ceramic slurry injection molding apparatus based on ceramic cleaver blanks according to claim 1, characterized in that: The frame (1) is equipped with a second cylinder (7), and the execution end of the second cylinder (7) is equipped with an ejector (71) that penetrates the bottom mold (13) and the piston disc (51).

6. A ceramic slurry injection molding method based on ceramic cleaver blanks, applied to the ceramic slurry injection molding apparatus based on ceramic cleaver blanks as described in claim 1, wherein the injection molding method comprises: S1, the top mold (11), bottom mold (13) and steel needle (2) are combined to form a complete mold cavity by the cooperation of hydraulic cylinder (12) and first air cylinder (21), and then ceramic slurry is injected into the mold cavity by external injection equipment; S2, after the ceramic slurry is formed, the hydraulic cylinder (12) drives the top mold (11) and the steel needle (2) to move up to complete the mold opening, and then the first cylinder (21) moves the steel needle (2) down again to insert and block the inner hole of the ceramic chopping knife (8); S3, the external air pump injects compressed air into the piston chamber (5) through the air supply hole (53), and then the compressed air enters the embryo (4) through the through hole (52), the air guide hole (41) and the cavity (3) in sequence, causing the whole consisting of multiple ceramic chopping blades (8) and the bearing plate (9) to be removed from the bottom mold (13) and the embryo (4).

7. The ceramic slurry injection molding apparatus based on ceramic cleaver blanks according to claim 6, characterized in that: In S3, when the whole assembly consisting of multiple ceramic chopping blades (8) and the support plate (9) is removed, if the ceramic chopping blade (8) breaks inside the embryo membrane (4), the steel needle (2) is re-entered into the embryo membrane (4) by the cooperation of the first cylinder (21) and inserted into the inner hole of the broken ceramic chopping blade (8). Then, the external air pump continuously supplies air to blow the broken ceramic chopping blade (8) out of the embryo membrane (4) along the steel needle (2).

8. The ceramic slurry injection molding apparatus based on ceramic cleaver blanks according to claim 7, characterized in that: In S3, when the ceramic chopping knife (8) broken inside the embryo (4) is tightly connected to the embryo (4) and cannot be blown out, as compressed air continues to flow in, the piston disc (51) will move down to the lowest point of the piston chamber (5). Through the cooperation of the spring pin (63), the locking pin (62) will be pushed out of the locking hole (6) to release the position lock of the embryo (4). Then, under the action of compressed air, the embryo (4) will be pushed out of the concave cavity (3). Finally, the personnel will remove the embryo (4) and clean the broken ceramic chopping knife (8) inside it.

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