A twin-screw ceramic bushing pressing die

Abstract

This utility model discloses a twin-screw ceramic bushing pressing mold, which is used in a hydraulic press to press and form twin-screw bushing blanks. Two twin-screw bushing blanks are enclosed to form a twin-screw bushing cavity structure. The twin-screw ceramic bushing pressing mold includes: a base, set on the hydraulic press, with a reverse mold on top; a mold body, set on the hydraulic press, having a pressing cavity; the mold body is adapted to the base through the pressing cavity, and the top of the pressing cavity is higher than the top of the reverse mold by a predetermined distance; a forming pressure head, set at the output end of the first drive component of the hydraulic press, and located above the mold body; the size of the forming pressure head is adapted to the size of the pressing cavity; the first drive component is used to drive the forming pressure head to move vertically into the pressing cavity. This invention solves the problem of existing twin-screw ceramic bushing preparation methods that use square molds to press flat green blanks, and then use CNC machine tools to mill off the excess green blanks, resulting in serious material waste and reduced production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold application technology, specifically to a twin-screw ceramic bushing pressing mold. Background Technology

[0002] Twin-screw ceramic bushings are components used inside the barrel of twin-screw extruders to improve the wear resistance of the barrel and prevent metal impurities from entering the material after wear, thus affecting product performance.

[0003] In related technologies, the preparation method of twin-screw ceramic bushings generally involves using a square mold to press the blank into a flat green sheet, and then using a CNC machine tool to mill off the excess green sheet, resulting in serious material waste and reduced production efficiency. Utility Model Content

[0004] This invention provides a twin-screw ceramic bushing pressing mold, which solves the technical problem in the twin-screw ceramic bushing preparation method that uses a square mold to press flat green blanks, and then uses a CNC machine tool to mill off the excess green blanks, resulting in serious material waste and reduced production efficiency.

[0005] In view of this, the present invention provides a twin-screw ceramic bushing pressing mold, which is used in a hydraulic press to press and form twin-screw bushing blanks. Two twin-screw bushing blanks are enclosed to form a twin-screw bushing cavity structure. The twin-screw ceramic bushing pressing mold includes:

[0006] A base is mounted on the hydraulic press, and a reverse mold for forming the twin-screw bushing blank is provided on the top;

[0007] The mold body, mounted on the hydraulic press, has a pressing cavity that extends vertically; the mold body is adapted to be mounted on the base through the pressing cavity, and the top of the pressing cavity is higher than the top of the reverse mold by a predetermined distance;

[0008] A forming pressure head is disposed at the output end of the first drive assembly of the hydraulic press and located above the mold body; the size of the forming pressure head is adapted to the size of the pressing cavity; the first drive assembly is used to drive the forming pressure head to move vertically into the pressing cavity.

[0009] Optionally, the mold includes two parallel semi-cylindrical bosses that partially overlap in the radial direction, and the mold is integrally formed.

[0010] Optionally, the hydraulic press includes a frame, a machine base, and the first drive assembly, wherein the first drive assembly and the machine base are both mounted on the frame, and the mold body and the base are both mounted on the machine base.

[0011] Optionally, the hydraulic press includes a frame, a platform, a first drive assembly, and a second drive assembly. The first drive assembly, the second drive assembly, and the platform are all mounted on the frame, and the mold body is mounted on the platform. The platform has a slot corresponding to the base. The output end of the second drive assembly passes through the slot and is connected to the bottom of the base, for driving the base to move vertically.

[0012] Optionally, the mold body is connected to the machine base by a first screw.

[0013] Optionally, the top of the machine tool is provided with a T-slot, and a nut is provided in the T-slot corresponding to the first screw; the first screw passes through the connecting hole of the mold body and extends into the T-slot to be threadedly connected to the nut.

[0014] Optionally, the top of the forming head is connected to the output end of the first drive assembly via a first adapter.

[0015] Optionally, the first adapter includes a first adapter block, and the upper and lower end sidewalls of the first adapter block are respectively provided with a first connecting part and a second connecting part; the first connecting part is connected to the output end of the first drive assembly by a second screw; the second connecting part is connected to the forming pressure head by a third screw.

[0016] Optionally, the bottom of the base is connected to the output end of the second drive component via a second adapter.

[0017] Optionally, the second adapter includes a second adapter block, and the upper and lower end sidewalls of the second adapter block are respectively provided with a third connecting part and a fourth connecting part. The third connecting part is connected to the base by a fourth screw; the fourth connecting part is connected to the output end of the second drive assembly by a fifth screw; the projection of the third connecting part in the vertical direction falls within the projection of the pressing cavity in the vertical direction.

[0018] The technical solution of this utility model has the following advantages:

[0019] 1. In this utility model, the base is set inside the mold body, and the forming head is driven to the pressing cavity to press the powder through the first driving component. The reverse mold on the base presses and forms a twin-screw bushing blank. The reverse mold forms a twin-screw channel in the twin-screw bushing blank, and then the two twin-screw bushing blanks are surrounded to form a twin-screw bushing cavity structure. The overall structure is relatively simple, the operation is easy and convenient, no need for complex processing, saving time and effort, greatly improving production efficiency, and is suitable for mass production.

[0020] 2. In this utility model, the twin-screw bushing blank is directly formed by pressing, and the standardized production allows for precise measurement of the amount of powder put into the pressing chamber each time, greatly reducing material loss. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of the twin-screw ceramic bushing pressing mold provided by this utility model, mounted on a hydraulic press, from one viewpoint.

[0023] Figure 2 for Figure 1 The diagram shows a cross-sectional view of a twin-screw ceramic bushing pressing die mounted on a hydraulic press.

[0024] Figure 3 A schematic diagram of the twin-screw ceramic bushing pressing mold provided by this utility model from a first-view perspective;

[0025] Figure 4 for Figure 3 A cross-sectional view of the twin-screw ceramic bushing pressing die shown;

[0026] Figure 5 A schematic diagram of the twin-screw ceramic bushing pressing mold provided by this utility model from a second perspective;

[0027] Figure 6 A structural schematic diagram of the base provided by this utility model from a third perspective;

[0028] Figure 7 A structural schematic diagram of the base provided by this utility model from a fourth perspective;

[0029] Figure 8 A schematic diagram of the structure of the mold body provided by this utility model from the fifth perspective;

[0030] Figure 9 for Figure 8 Sectional view at point AA;

[0031] Figure 10 A schematic diagram of the structure of the mold body provided by this utility model from the sixth perspective;

[0032] Figure 11A schematic diagram of the twin-screw bushing blank provided by this utility model from the seventh perspective.

[0033] Figure 12 A schematic diagram of the twin-screw bushing blank provided by this utility model from the eighth perspective.

[0034] Figure 13 This is a structural schematic diagram of the pressing head provided by this utility model from the ninth perspective.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Twin-screw bushing blank; 2. Base; 3. Reverse mold; 4. Mold body; 5. Pressing cavity; 6. Forming head; 7. Frame; 8. Machine base; 9. T-slot; 10. First adapter; 11. Second adapter; 12. Upper pressure block; 13. Lower pressure block; 14. First screw. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] For this purpose, please refer to Figures 1 to 13 This embodiment provides a twin-screw ceramic bushing pressing mold, which is used in a hydraulic press to press and form a twin-screw bushing blank 1. Two twin-screw bushing blanks 1 are enclosed to form a twin-screw bushing cavity structure. The twin-screw ceramic bushing pressing mold includes: a base 2, which is set on the hydraulic press and has a reverse mold 3 at the top for forming the twin-screw bushing blank 1; a mold body 4, which is set on the hydraulic press and has a pressing cavity 5 that runs through in the vertical direction; the mold body 4 is adapted to be mounted on the base 2 through the pressing cavity 5, and the top of the pressing cavity 5 is higher than the top of the reverse mold 3 by a predetermined distance; a forming pressure head 6, which is set at the output end of the first drive component of the hydraulic press and is located above the mold body 4; the size of the forming pressure head 6 is adapted to the size of the pressing cavity 5; the first drive component is used to drive the forming pressure head 6 to move vertically into the pressing cavity 5.

[0042] In this embodiment, the base 2 is installed on a hydraulic press, and the mold body 4 is fitted onto the base 2, so that the entire base 2 is located inside the pressing cavity 5. Then, the powder is placed in the space above the base 2 in the pressing cavity 5, and the excess powder on the top of the mold body 4 is scraped off. Then, the forming head 6 is driven downward by the first driving component. The forming head 6 moves into the pressing cavity 5 to press the powder. In conjunction with the reverse mold 3 on the base 2, the twin-screw bushing blank 1 is pressed and formed. The reverse mold 3 is used to form the twin-screw channel in the twin-screw bushing blank 1. Then, the two twin-screw bushing blanks 1 are surrounded to form a twin-screw bushing cavity structure. The overall structure is relatively simple, the operation is simple and convenient, and there is no need for complex processing again. It saves time and effort and greatly improves production efficiency, making it suitable for mass production. In addition, the twin-screw bushing blank 1 is directly formed by pressing, and the production is standardized. This allows for precise measurement of the amount of powder put into the pressing cavity 5 each time, greatly reducing material loss. In practical applications, the pressing mold provided in this embodiment reduces powder loss by more than 50%, increases production efficiency by more than two times, and has high repeatability.

[0043] Specifically, such as Figures 1 to 5 , Figures 8 to 10 and Figure 13 As shown, the horizontal cross-section of the pressing cavity 5 is square, and the forming head 6 and the base 2 are correspondingly adapted to be cuboid in order to facilitate mutual cooperation and avoid gaps.

[0044] In one embodiment, such as Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, the reverse mold 3 includes two parallel semi-cylindrical bosses, which partially overlap in the radial direction, and the reverse mold 3 is integrally formed.

[0045] It should be noted that the arc surface of the boss faces the forming pressure head 6.

[0046] In this embodiment, the reverse mold 3 is integrally formed from two semi-cylindrical bosses, so that the twin-screw bushing blank 1 formed by pressing has a space that surrounds and forms a twin-screw channel.

[0047] In one embodiment, the hydraulic press includes a frame 7, a machine base 8, and a first drive assembly. The first drive assembly and the machine base 8 are both mounted on the frame 7, and the mold body 4 and the base 2 are both mounted on the machine base 8.

[0048] In this embodiment, the mold body 4 and the base 2 are supported by the machine base 8, and the forming head 6 is driven to move downward by the first driving component, so as to complete the pressing of the twin screw bushing blank 1 in conjunction with the mold body 4 and the base 2.

[0049] As a possible implementation method, it can also be, for example... Figure 1 and Figure 2 As shown, the hydraulic press includes a frame 7, a machine base 8, a first drive assembly, and a second drive assembly. The first drive assembly, the second drive assembly, and the machine base 8 are all mounted on the frame 7, and the mold body 4 is mounted on the machine base 8. The machine base has a slot corresponding to the base. The output end of the second drive assembly passes through the slot and is connected to the bottom of the base 2, and is used to drive the base 2 to move in the vertical direction.

[0050] In this embodiment, a second driving component is provided below the base 2. The output end of the second driving component passes through the slot of the machine tool and is connected to the base 2 so as to drive the base 2 to move in the vertical direction. After pressing is completed, the base 2 is driven to move to the upper surface of the mold body 4 to remove the twin-screw bushing blank 1 and clean the base 2. The second driving component can cooperate with the first driving component to apply opposing forces to the base 2 and the forming head 6 respectively, thereby improving the pressing effect.

[0051] In one embodiment, such as Figure 4 As shown, the mold body 4 is connected to the machine base 8 by the first screw 14.

[0052] In this embodiment, the mold body 4 is connected to the machine base 8 by the first screw 14, which facilitates installation, rotation and disassembly, and maintenance. At the same time, it is convenient to replace the mold body 4 with a pressing cavity 5 of different sizes according to the size of the twin-screw bushing blank 1 to be pressed.

[0053] In one embodiment, such as Figure 1 As shown, the top of the machine base 8 is provided with a T-groove 9, and a nut is provided in the T-groove 9 corresponding to the first screw 14; the first screw passes through the connecting hole of the mold body 4 and extends into the T-groove 9 to be threadedly connected to the nut.

[0054] In this embodiment, a T-groove 9 is provided on the top of the machine base 8, and a nut is provided in the T-groove 9 corresponding to the first screw. During connection, the nut is moved in the T-groove 9 to the position corresponding to the connection hole of the mold body 4, so that the first screw passes through the connection hole and is threadedly connected to the nut, so as to fix the mold body 4, further improve stability, and avoid displacement during the pressing process, which would affect the pressing effect.

[0055] In one embodiment, such as Figures 1 to 5 As shown, the top of the forming head 6 is connected to the output end of the first drive assembly via the first adapter 10.

[0056] In this embodiment, the forming head 6 is connected to the output end of the first drive assembly via the first adapter 10 to improve the connection strength.

[0057] In one embodiment, such as Figures 1 to 5 As shown, the first adapter 10 includes a first adapter block, and the upper and lower sidewalls of the first adapter block are respectively provided with a first connecting part and a second connecting part; the first connecting part is connected to the output end of the first drive assembly through a second screw; the second connecting part is connected to the forming pressure head 6 through a third screw.

[0058] In this embodiment, a first connecting part and a second connecting part are respectively provided at the upper and lower ends of the first adapter block, so that an installation space is formed between the first connecting part and the second connecting part, so that the first connecting part can be connected to the output end of the first drive component by the second screw, and the second connecting part can be connected to the forming pressure head 6 by the third screw, which facilitates installation and disassembly; at the same time, the first connecting part and the second connecting part increase the contact area when connecting, so as to increase the force strength and the force balance.

[0059] In one embodiment, such as Figures 1 to 5 As shown, the bottom of the base 2 is connected to the output end of the second drive assembly via the second adapter 11.

[0060] In this embodiment, the base 2 is connected to the output end of the second drive component through the second adapter 11 to improve the connection strength.

[0061] In one embodiment, such as Figures 1 to 5 As shown, the second adapter 11 includes a second adapter block. The upper and lower side walls of the second adapter block are respectively provided with a third connecting part and a fourth connecting part. The third connecting part is connected to the base 2 by a fourth screw. The fourth connecting part is connected to the output end of the second drive assembly by a fifth screw. The projection of the third connecting part in the vertical direction falls within the projection of the pressing cavity in the vertical direction.

[0062] In this embodiment, a third connecting part and a fourth connecting part are respectively provided at the upper and lower ends of the second adapter block, so that an installation space is formed between the third connecting part and the fourth connecting part, so that the third connecting part can be connected to the base 2 by the fourth screw 15 and the fourth connecting part can be connected to the output end of the second drive component by the fifth screw, which facilitates installation and disassembly. At the same time, the third connecting part and the fourth connecting part increase the contact area during connection, thereby increasing the force strength and force balance. The size of the third connecting part is smaller than the size of the pressing cavity, so that the base 2 can be pushed out of the pressing cavity as it moves upward with the base 2.

[0063] Specifically, such as Figure 1 and Figure 2 As shown, the first drive assembly includes a first hydraulic cylinder and an upper pressure head; the output shaft of the hydraulic cylinder is arranged vertically downward and connected to the upper pressure head; the bottom of the upper pressure head is connected to the forming pressure head 6 to improve stability.

[0064] Specifically, such as Figure 1 and Figure 2 As shown, the second drive assembly includes a second hydraulic cylinder and a lower pressure head; the output shaft of the second hydraulic cylinder is arranged vertically upward and connected to the lower pressure head; the top of the lower pressure head is connected to the base 2 to improve stability.

[0065] Specifically, the mold body 4 is made of steel to improve overall strength.

[0066] Specifically, the base 2 is made of steel to improve overall strength.

[0067] Specifically, the forming head 6 is made of steel to improve overall strength.

[0068] Specifically, the hydraulic press is a four-column hydraulic press.

[0069] The pressing process of the twin-screw ceramic bushing pressing die provided in this embodiment includes the following steps:

[0070] Step 1: Secure the base 2 to the lower pressure head of the hydraulic press using the third screw 16 via the second adapter 11;

[0071] Step 2: Fit the mold body 4 into the base 2 and lock it onto the T-slot 9 on the top of the machine base 8 with the first screw 14;

[0072] Step 3: Secure the forming head 6 to the upper head of the hydraulic press using the second screw via the first adapter 10;

[0073] Step 4: Weigh the ceramic components, fill them into the pressing cavity 5 of the mold body 4, and level them.

[0074] Step 5: Start the hydraulic press, design the pressing parameters, and start pressing; the lower press head, base 2, and mold body 4 are stationary, while the upper press head drives the forming press head 6 to move toward the mold body 4, compacting the powder inside the mold body 4;

[0075] Step 6: After the pressure holding is completed, the upper pressure head rises and resets, and the lower pressure head pushes the base 2 out to a position where it is level with the height of the mold body 4. The operator takes out the twin-screw ceramic bushing blank, cleans the mold with an air gun, and continues to load powder for the next pressing. Two twin-screw ceramic bushing blanks can be used to form a twin-screw bushing cavity structure.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A twin-screw ceramic bushing pressing mold, characterized in that, A double-screw bushing blank (1) is used in a hydraulic press for pressing and forming a double-screw bushing blank (1). Two double-screw bushing blanks (1) are enclosed to form a double-screw bushing cavity structure. The double-screw ceramic bushing pressing mold includes: The base (2) is set on the hydraulic press, and the top is provided with a reverse mold (3) for forming the twin screw bushing blank (1); The mold body (4) is mounted on the hydraulic press and has a pressing cavity (5) that runs through the vertical direction; the mold body (4) is adapted to be mounted on the base (2) through the pressing cavity (5), and the top of the pressing cavity (5) is higher than the top of the reverse mold (3) by a predetermined distance; A forming head (6) is disposed at the output end of the first drive assembly of the hydraulic press and located above the mold body (4); the size of the forming head (6) is adapted to the size of the pressing cavity (5); the first drive assembly is used to drive the forming head (6) to move vertically into the pressing cavity (5).

2. The twin screw ceramic bushing press die of claim 1, wherein, The reverse mold (3) includes two parallel semi-cylindrical bosses that partially overlap in the radial direction, and the reverse mold (3) is integrally formed.

3. The twin screw ceramic bushing press die of claim 1, wherein, The hydraulic press includes a frame (7), a machine base (8) and a first drive assembly. The first drive assembly and the machine base (8) are both mounted on the frame (7), and the mold body (4) and the base (2) are both mounted on the machine base (8).

4. The twin screw ceramic bushing press die of claim 1, wherein, The hydraulic press includes a frame (7), a machine base (8), a first drive component and a second drive component. The first drive component, the second drive component and the machine base (8) are all mounted on the frame (7), and the mold body (4) is mounted on the machine base (8). The machine base has a slot corresponding to the base (2). The output end of the second drive component passes through the slot and is connected to the bottom of the base (2) to drive the base (2) to move in the vertical direction.

5. Double screw ceramic bushing press die according to claim 3 or 4, characterized in that The mold body (4) is connected to the machine base (8) by the first screw (14).

6. The twin-screw ceramic bushing pressing die according to claim 5, characterized in that, The top of the machine base (8) is provided with a T-groove (9), and a nut is provided in the T-groove (9) corresponding to the first screw (14); the first screw passes through the connecting hole of the mold body (4) and extends into the T-groove (9) to be threadedly connected to the nut.

7. The twin screw ceramic bushing press die of claim 1, wherein, The top of the forming head (6) is connected to the output end of the first drive assembly via a first adapter (10).

8. The twin screw ceramic bushing press die of claim 7, wherein, The first adapter (10) includes a first adapter block, and the upper and lower sidewalls of the first adapter block are respectively provided with a first connecting part and a second connecting part; the first connecting part is connected to the output end of the first drive assembly by a second screw; the second connecting part is connected to the forming head (6) by a third screw.

9. The twin screw ceramic bushing press die of claim 4, wherein, The bottom of the base (2) is connected to the output end of the second drive component via a second adapter (11).

10. The twin screw ceramic bushing press die of claim 9, wherein, The second adapter (11) includes a second adapter block. The upper and lower side walls of the second adapter block are respectively provided with a third connecting part and a fourth connecting part. The third connecting part is connected to the base (2) by a fourth screw. The fourth connecting part is connected to the output end of the second drive assembly by a fifth screw. The projection of the third connecting part in the vertical direction falls within the projection of the pressing cavity in the vertical direction.

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