Ceramic core mold capable of exhausting air in whole mold cavity

Abstract

The utility model discloses a full-cavity exhaust ceramic core mold, which belongs to the technical field of ceramic molds, and comprises a lower mold, an upper mold, a cover plate, a right cushion block, a left cushion block and a bottom plate, the lower mold is fixedly connected with the bottom plate through a screw rod, the upper mold, the lower mold and the cover plate are mutually and fixedly connected through the screw rod, the right cushion block is positioned below the right side of the lower mold, and the left cushion block is positioned below the right side of the lower mold. The left cushion block is located below the left side of the lower die, an ejector plate is arranged above the bottom plate, a pressing plate is fixedly connected to the upper portion of the ejector plate, an upper die exhaust insert fixing block is fixedly connected into the upper die, and an upper die exhaust insert is fixedly connected to the lower portion of the upper die exhaust insert fixing block through a screw. According to the device, by optimizing the structure of the exhaust insert and the mode of negative pressure of the mold cavity, air in the cavity can be more easily exhausted from the mold in the ceramic core pressing process, and meanwhile the situation that bubbles appear in the exhaust insert area and an inner cavity of the ceramic core is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic molds, in particular to a ceramic core mold with full-cavity exhaust. Background Technique

[0002] With the development of the aviation industry, the requirements for the inner cavity of products are getting higher and higher. In order to meet the requirements of the inner cavity of products, problems such as shrinkage depression, air entrapment, flow marks, and bubbles should not occur in the products pressed by the ceramic core mold. The positions where air holes appear in the ceramic core include air holes on the outer surface of the ceramic core, flow marks on the outer surface of the ceramic core, air holes in the inner cavity of the ceramic core, air holes at the ceramic core partition plate, etc.

[0003] With the progress of the mold design concept and manufacturing level, the requirements for the mold structure are getting higher and higher. It is required that the products pressed by the mold have good consistency, stable shape, simple mold operation, high production efficiency, and be easy to manufacture and maintain.

[0004] At present, problems such as air entrapment, flow marks, and bubbles generally exist in complex cavity molds, and these problems often cannot be solved by opening exhaust grooves or exhaust inserts. It is necessary to develop a ceramic core mold that can achieve full-cavity exhaust to solve the exhaust problem. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a ceramic core mold with full-cavity exhaust.

[0006] The technical solution of the utility model is: a ceramic core mold with full-cavity exhaust, including a lower mold, an upper mold, a cover plate, a right spacer, a left spacer, and a bottom plate. The lower mold is fixedly connected to the bottom plate through a screw. The upper mold, the lower mold, and the cover plate are fixedly connected to each other through screws. The right spacer is located below the right side of the lower mold, and the left spacer is located below the left side of the lower mold. A ejector plate is provided above the bottom plate, and a pressing plate is fixedly connected above the ejector plate. An upper mold exhaust insert fixing block is fixedly connected inside the upper mold. The lower part of the upper mold exhaust insert fixing block is fixedly connected with an upper mold exhaust insert through a screw. A lower mold exhaust insert fixing block is fixedly connected inside the lower mold. The upper part of the lower mold exhaust insert fixing block is fixedly connected with a lower mold exhaust insert through a screw. A first cam fixing block is fixedly connected above the front side of the bottom plate, and a second cam fixing block is fixedly connected above the rear side of the bottom plate. A camshaft is rotatably connected between the first cam fixing block and the second cam fixing block. The front end of the camshaft is fixedly connected with a handle. Two cams are fixedly connected to the camshaft. The upper parts of the two cams are abutted against the ejector plate. A first ejector block is provided on the front side above the pressing plate, and two ejector blocks are arranged side by side on the rear side of the pressing plate. Two ejector blocks are arranged side by side on the rear side of the ejector block. The lower ends of the first ejector block, the ejector blocks, and the ejector blocks are fixedly connected to the pressing plate. The tops of the first ejector block, the ejector blocks, and the ejector blocks movably pass through the outer wall of the lower mold and are in contact with the inner cavity of the lower mold. A pouring nozzle is fixedly connected to the top of the rear side of the lower mold.

[0007] Further, a reset sensor is fixedly connected to the right side of the ejector plate. Four reset rods are arranged in a rectangular distribution on the top of the pressing plate. The lower ends of the reset rods are fixedly connected to the pressing plate. The tops of the reset rods are in contact with the inside of the lower mold. A reset spring is arranged outside the reset rods. The lower end of the reset spring is abutted against the top of the pressing plate, and the top of the reset spring is abutted against the bottom of the lower mold.

[0008] Note: Check whether the ejector plate is reset through the reset sensor, and apply pressure to the pressing plate through the reset spring, so as to reset the top plate.

[0009] Further, a first dust-proof plate is fixedly connected to the top of the rear side of the bottom plate, and a second dust-proof plate is fixedly connected to the top of the front side of the bottom plate. The first dust-proof plate is fixedly connected to the rear side walls of the left spacer and the right spacer through screws, and the second dust-proof plate is fixedly connected to the front side walls of the left spacer and the right spacer through screws.

[0010] Note: Prevent dust from entering the inside of the core mold through the first dust-proof plate and the second dust-proof plate, resulting in a decline in product quality.

[0011] Further, a cooling water nozzle is fixedly connected to the left side of both the upper mold and the lower mold.

[0012] Description: The temperature of the mold is controlled by a cooling water nozzle to make the mold reach the required production temperature.

[0013] Furthermore, a limit switch is fixedly connected to the right side of the bottom plate, a seal is provided on the top of the lower mold, a seal switch is fixedly connected to the left side of the top of the lower mold, the seal switch is communicated with the seal, an air pipe is fixedly connected to the left side wall of the lower mold, the proximal end of the air pipe is communicated with the inside of the seal switch, and the distal end of the air pipe is communicated with a negative pressure pump.

[0014] Description: Controlling the tightness of the seal through the seal switch is beneficial to improving the air extraction efficiency of the negative pressure pump.

[0015] The beneficial effects of the present utility model are as follows:

[0016] (1) When pressing the ceramic core, the negative pressure pump in this device extracts the air in the cavity of the ceramic core, making the pressure in the cavity of the ceramic core less than the external pressure, achieving the effect of filling the ceramic core. There are no problems such as trapped air, flow marks, and bubbles in the pressed ceramic core. The qualification rate of the ceramic core is improved. The upper mold exhaust insert is composed of many small inserts integrated into one body. When injecting the ceramic core material into the mold, the ceramic core material pushes the air in the mold to move, and the air in the cavity can quickly escape from the gaps of the exhaust inserts of the mold, achieving the effect of no air holes in the product.

[0017] (2) This device makes the air in the cavity of the ceramic core easier to escape from the mold during the pressing process of the ceramic core by optimizing the structure of the exhaust insert and the negative pressure in the mold cavity, and at the same time, there will be no bubbles in the exhaust insert area and the inner cavity of the ceramic core. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is Figure 1 the sectional view at F-F in

[0020] Figure 3 is a schematic top view structure diagram of the present utility model.

[0021] Figure 4 is a three-dimensional installation diagram of the reset sensor of the present utility model.

[0022] Figure 5 is a three-dimensional internal view of the lower mold in this embodiment.

[0023] Among them, 3 - lower die, 2 - upper die, 1 - cover plate, 4 - right cushion block, 5 - left cushion block, 8 - bottom plate, 6 - pressure plate, 7 - ejector plate, 9 - upper die exhaust insert, 11 - upper die exhaust insert fixing block, 12 - lower die exhaust insert, 13 - cam, 14 - lower die exhaust insert fixing block, 15 - camshaft, 16 - first cam fixing block, 17 - handle, 18 - second cam fixing block, 19 - first ejector block, 21 - second ejector block, 22 - third ejector block, 23 - reset sensor, 24 - injection nozzle, 25 - first dust-proof plate, 26 - second dust-proof plate, 27 - reset rod, 31 - reset spring, 32 - cooling water nozzle, 33 - limit switch, 34 - seal, 35 - seal switch, 36 - air pipe, 37 - negative pressure pump. Detailed implementation mode

[0024] Example 1:

[0025] As Figure 1 , Figure 2 shown, a ceramic core mold with full-cavity exhaust includes a lower die 3, an upper die 2, a cover plate 1, a right cushion block 4, a left cushion block 5, and a bottom plate 8. The lower die 3 is fixedly connected to the bottom plate 8 through a screw. The upper die 2, the lower die 3, and the cover plate 1 are fixedly connected to each other through screws. The right cushion block 4 is located below the right side of the lower die 3, and the left cushion block 5 is located below the left side of the lower die 3. An ejector plate 7 is provided above the bottom plate 8, and a pressure plate 6 is fixedly connected above the ejector plate 7. An upper die exhaust insert fixing block 11 is fixedly connected inside the upper die 2, and an upper die exhaust insert 9 is fixedly connected below the upper die exhaust insert fixing block 11 through a screw. A lower die exhaust insert fixing block 14 is fixedly connected inside the lower die 3, and a lower die exhaust insert 12 is fixedly connected above the lower die exhaust insert fixing block 14 through a screw. As Figure 5 shown, a first cam fixing block 16 is fixedly connected above the front side of the bottom plate 8, and a second cam fixing block 18 is fixedly connected above the rear side of the bottom plate 8. A camshaft 15 is rotatably connected between the first cam fixing block 16 and the second cam fixing block 18. A handle 17 is fixedly connected to the front end of the camshaft 15. Two cams 13 are fixedly connected to the camshaft 15. The upper sides of the two cams 13 are in contact with the ejector plate 7. A first ejector block 19 is provided on the front side above the pressure plate 6, and two second ejector blocks 21 are arranged side by side on the rear side of the pressure plate 6. Two third ejector blocks 22 are arranged side by side on the rear side of the second ejector blocks 21. The lower ends of the first ejector block 19, the second ejector blocks 21, and the third ejector blocks 22 are all fixedly connected to the pressure plate 6. The tops of the first ejector block 19, the second ejector blocks 21, and the third ejector blocks 22 movably pass through the outer wall of the lower die 3 and are in contact with the inner cavity of the lower die 3. An injection nozzle 24 is fixedly connected to the top of the rear side of the lower die 3.

[0026] As Figure 4As shown in the figure, a reset sensor 23 is fixedly connected to the right side of the ejector plate 7. Four reset rods 27 are rectangularly distributed on the top of the pressure plate 6. The lower ends of the reset rods 27 are fixedly connected to the pressure plate 6. The tops of the reset rods 27 are in contact with the inside of the lower die 3. A reset spring 31 is arranged outside the reset rods 27. The lower end of the reset spring 31 is in contact with the top of the pressure plate 6, and the top of the reset spring 31 is in contact with the bottom of the lower die 3.

[0027] As Figure 3 shown, a limit switch 33 is fixedly connected to the right side of the bottom plate 8. A seal 34 is arranged on the top of the lower die 3. A seal switch 35 is fixedly connected to the left side of the top of the lower die 3. The seal switch 35 is communicated with the seal 34. An air pipe 36 is fixedly connected to the left side wall of the lower die 3. The proximal end of the air pipe 36 is communicated with the inside of the seal switch 35, and the distal end of the air pipe 36 is communicated with a negative pressure pump 37.

[0028] Embodiment 2:

[0029] On the basis of Embodiment 1, a dust-proof plate 1 25 is fixedly connected to the top of the rear side of the bottom plate 8 in Embodiment 2, and a dust-proof plate 2 26 is fixedly connected to the top of the front side of the bottom plate 8. The dust-proof plate 1 25 is fixedly connected to the rear side walls of the left cushion block 5 and the right cushion block 4 by screws, and the dust-proof plate 2 26 is fixedly connected to the front side walls of the left cushion block 5 and the right cushion block 4 by screws.

[0030] Compared with Embodiment 1, in Embodiment 2, the dust-proof plate 1 25 and the dust-proof plate 2 26 are used to prevent dust from entering the inside of the ceramic core mold, resulting in a decline in product quality.

[0031] Embodiment 3:

[0032] A cooling water nozzle 32 is fixedly connected to the left side of both the upper die 2 and the lower die 3.

[0033] Compared with Embodiment 2, in Embodiment 3, the ceramic core mold is cooled by the cooling water nozzle 32 to improve the forming efficiency of the product.

[0034] In the above embodiments, the negative pressure pump 37 uses a commercially available product. As long as it can achieve the functions of the present invention, those skilled in the art can select and use it according to common sense and no special limitation is made here.

Claims

1. A ceramic core mold with full cavity exhaust, characterized in that: The invention comprises a lower mold (3), an upper mold (2), a cover plate (1), a right pad (4), a left pad (5), and a bottom plate (8), wherein the lower mold (3) is fixedly connected to the bottom plate (8) by means of screws, and the upper mold (2), the lower mold (3), and the cover plate (1) are fixedly connected to each other by means of screws, the right pad (4) is located below the right side of the lower mold (3), the left pad (5) is located below the left side of the lower mold (3), an ejector plate (7) is provided above the bottom plate (8), and the ejector plate (7) is fixedly connected to the top A pressure plate (6) is provided, the upper mold (2) is fixedly connected with an upper mold exhaust insert fixing block (11), the lower part of the upper mold exhaust insert fixing block (11) is fixedly connected with an upper mold exhaust insert (9) by screws, the lower mold (3) is fixedly connected with a lower mold exhaust insert fixing block (14), the upper part of the lower mold exhaust insert fixing block (14) is fixedly connected with a lower mold exhaust insert (12) by screws, the upper part of the front side of the bottom plate (8) is fixedly connected with a cam fixing block (16), the A cam fixing block 2 (18) is fixedly connected to the upper rear side of the bottom plate (8); a cam shaft (15) is rotatably connected between the cam fixing block 1 (16) and the cam fixing block 2 (18); a handle (17) is fixedly connected to the front end of the cam shaft (15); two cams (13) are fixedly connected to the cam shaft (15); the upper parts of the two cams (13) are in contact with the ejection plate (7); an ejection block 1 (19) is provided on the upper front side of the pressure plate (6); and a cam shaft (15) is rotatably connected to the upper front side of the pressure plate (6). Two ejector blocks (21) are arranged side by side, and two ejector blocks (22) are arranged side by side on the rear side of the ejector blocks (21). The lower ends of the ejector blocks (19), (21) and (22) are fixedly connected to the pressing plate (6). The tops of the ejector blocks (19), (21) and (22) are movably passed through the outer wall of the lower mold (3) to contact the internal cavity of the lower mold (3). The top of the rear side of the lower mold (3) is fixedly connected to an injection nozzle (24).

2. A ceramic core mold with full cavity exhaust as claimed in claim 1, characterized in that: A reset sensor (23) is fixedly connected to the right side of the ejection plate (7); four reset rods (27) are distributed in a rectangular shape on the top of the pressure plate (6); the lower ends of the reset rods (27) are fixedly connected to the pressure plate (6); the tops of the reset rods (27) abut against the inside of the lower mold (3); a reset spring (31) is provided on the outer side of the reset rods (27); the lower ends of the reset springs (31) abut against the top of the pressure plate (6); and the tops of the reset springs (31) abut against the bottom of the lower mold (3).

3. A ceramic core mold with full cavity exhaust as claimed in claim 1, characterized in that: A dustproof plate 1 (25) is fixedly connected to the top of the rear side of the base plate (8), and a dustproof plate 2 (26) is fixedly connected to the top of the front side of the base plate (8). The dustproof plate 1 (25) is fixedly connected to the rear side walls of the left pad (5) and the right pad (4) by screws, and the dustproof plate 2 (26) is fixedly connected to the front side walls of the left pad (5) and the right pad (4) by screws.

4. A ceramic core mold with full cavity exhaust as claimed in claim 1, characterized in that: The left sides of the upper mold (2) and the lower mold (3) are both fixedly connected with a cooling water nozzle (32).

5. A ceramic core mold with full cavity exhaust as claimed in claim 1, characterized in that: A limit switch (33) is fixedly connected to the right side of the bottom plate (8), a sealing member (34) is provided on the top of the lower mold (3), a sealing switch (35) is fixedly connected to the left side of the top of the lower mold (3), the sealing switch (35) is connected to the sealing member (34), an air pipe (36) is fixedly connected to the left side wall of the lower mold (3), the proximal end of the air pipe (36) is connected to the inside of the sealing switch (35), and the distal end of the air pipe (36) is connected to a negative pressure pump (37).

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