Dry pressing mold for t-shaped product

Abstract

The utility model provides a kind of T product dry pressing mould, it is applicable to dry pressing forming T blank, including mould frame, upper die set and lower die set.Upper die set contains upper die, upper die holder, upper die holder pressing plate and upper die holder fixed plate, upper die holder lower end detachably installs upper die, and fixed in upper die holder fixed plate by upper die holder pressing plate, and upper die holder fixed plate is connected with the driving device of equipment;Upper die set can be lifted relative to mould frame, and upper die is movably matched in first powder cavity.Lower die set contains lower die, lower die pressing plate and lower die fixed plate, and lower die fixed plate is connected with the fixed plate of equipment, and lower die is installed by lower die pressing plate;Lower die is movably matched in second powder cavity.Mould frame is coaxially provided with first, second powder cavity, and the diameter or equivalent diameter of first powder cavity is greater than second powder cavity, and the adjacent end of both forms step;Mould frame is connected with the movable plate of equipment, and can be lifted relative to lower die.

Description

Technical Field

[0001] This utility model belongs to the field of dry pressing technology, and specifically refers to a dry pressing mold for T-shaped products. Background Technology

[0002] Dry pressing is a method for forming ceramic green bodies. It involves loading powder containing 5%–8% moisture and a binder into a metal mold, and then applying pressure in one, two, or two directions to tightly bind the particles and form the green body. This process is characterized by high production efficiency and high product density, but it has limitations such as high mold costs and poor green body uniformity. Pressure parameters and holding time must be controlled during pressing; the recommended pressure range for structural ceramics is 70–100 MPa.

[0003] Existing dry pressing molds are generally only suitable for cylindrical products, such as cylindrical and square columns with straight top and bottom shapes, but they are not very effective for pressing T-shaped products. Utility Model Content

[0004] The main purpose of this utility model is to provide a dry pressing mold for T-shaped products, which solves the problems existing in the prior art and is suitable for dry pressing T-shaped blanks.

[0005] To achieve the above objectives, the solution of this utility model is: A T-shaped dry pressing mold includes a mold frame, an upper mold assembly, and a lower mold assembly. The upper mold assembly includes an upper mold, an upper mold base, an upper mold base pressure plate, and an upper mold base fixing plate. The lower mold assembly includes a lower mold, a lower mold pressure plate, and a lower mold fixing plate. The mold frame has a first powder cavity and a second powder cavity coaxially arranged, with the diameter or equivalent diameter of the first powder cavity being larger than that of the second powder cavity, so that a step is formed between their adjacent ends. The upper mold is detachably mounted on the lower end of the upper mold base and fixed to the upper mold fixing plate by the upper mold base pressure plate. The plate is installed on the drive device of the equipment; the upper mold assembly moves up and down relative to the mold frame so that the upper mold is movably fitted in the first powder cavity, and the peripheral surface of the upper mold is clearance-fitted with the side wall of the first powder cavity; the lower mold fixing plate is installed on the fixed plate of the equipment, and the lower mold is fixed on the lower mold fixing plate by the lower mold pressure plate; the mold frame is installed on the movable plate of the equipment and moves up and down relative to the lower mold so that the lower mold is movably fitted in the second powder cavity, and the peripheral surface of the lower mold is clearance-fitted with the side wall of the second powder cavity.

[0006] The T-shaped dry pressing mold further includes a core rod assembly, which includes at least one core rod. The core rod moves through the lower mold and the upper mold from bottom to top and is inserted into the mold frame. The upper mold and the lower mold are respectively provided with through holes for the core rod to be inserted. The circumferential surface of the core rod is clearance-fitted with the side wall of the through hole.

[0007] Preferably, the core rod assembly further includes an extension rod, an extension rod pressure plate, and an extension rod pad; the relative position of the extension rod pad and the lower mold fixing plate remains fixed and they are parallel; the lower end of the extension rod is fixed to the extension rod pad through the extension rod pressure plate, and its upper end passes through the lower mold fixing plate and is detachably connected to the core rod.

[0008] Preferably, the core rod assembly further includes a support rod for supporting the extension rod pad, and a support rod fixing plate for fixing the upper end of the support rod to the lower surface of the extension rod pad; the lower end of the support rod is installed on the equipment by means of a threaded connection.

[0009] After adopting the above technical solution, the present invention has the following technical effects: The first and second powder cavities within the mold frame of this invention form a T-shaped longitudinal section, suitable for dry pressing to form T-shaped blanks, meeting the molding requirements of special shapes. During the dry pressing process, the height of the second powder cavity can be changed by raising or lowering the mold frame, thereby changing the total height of the product. The upper mold moves up and down towards the mold frame under the action of the equipment, so that the upper and lower molds press the granular materials in the first and second powder cavities respectively. After the upper mold has pressed for a certain stroke, the upper mold and the mold frame continue to pull down synchronously, with the pulling speed of the two being the same, and there is a tendency to apply pressure in the opposite direction to the lower mold. Attached Figure Description

[0010] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0011] Figure 2 This is a cross-sectional view of a specific embodiment of the present utility model.

[0012] Explanation of icon numbers: 100 - Mold frame; 101 - First powder cavity; 102 - Second powder cavity; 103 - Step; 200 - Upper module; 201 - Upper mold; 2011 - Through hole; 202 - Upper mold base; 203 - Upper mold base pressure plate; 204 - Upper mold base fixing plate; 300 - Lower module; 301 - Lower mold; 3011 - Through hole; 302 - Lower mold pressure plate; 303 - Lower mold fixing plate; 400-Core rod assembly; 401-Core rod; 402-Extension rod; 403-Extension rod pressure plate; 404-Extension rod pad; 405-Support rod; 406-Support rod fixing plate. Detailed Implementation

[0013] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0014] refer to Figure 1 , Figure 2 As shown, this utility model discloses a T-shaped product dry pressing mold, including a mold frame 100, an upper mold assembly 200, and a lower mold assembly 300; the upper mold assembly 200 includes an upper mold 201, an upper mold base 202, an upper mold base pressure plate 203, and an upper mold base fixing plate 204; the lower mold assembly 300 includes a lower mold 301, a lower mold pressure plate 302, and a lower mold fixing plate 303; The mold frame 100 has a first powder cavity 101 and a second powder cavity 102 arranged coaxially. The diameter or equivalent diameter of the first powder cavity 101 is larger than that of the second powder cavity 102, so that a step 103 is formed between the adjacent ends of the two. The upper mold 201 is detachably mounted on the lower end of the upper mold base 202 and fixed to the upper mold fixing plate 204 by the upper mold base pressure plate 203. The upper mold base fixing plate 204 is mounted on the drive device of the equipment (e.g., cylinder, hydraulic cylinder, linear motor, etc.). Under the action of the drive device of the equipment, the upper mold assembly 200 moves up and down relative to the mold frame 100 so that the upper mold 201 is movably fitted in the first powder cavity 101, and the circumferential surface of the upper mold 201 is clearance-fitted with the side wall of the first powder cavity 101. The upper mold base pressure plate 203 and the upper mold fixing plate 204 are assembled by bolt locking. The lower mold fixing plate 303 is mounted on the fixed plate of the equipment (without moving), and the lower mold 301 is fixed on the lower mold fixing plate 303 by the lower mold pressure plate 302; wherein, the lower mold pressure plate 302 and the lower mold fixing plate 303 are assembled by bolt locking. The mold frame 100 is mounted on the movable plate of the equipment and moves up and down relative to the lower mold 301 so that the lower mold 301 is movable and fitted in the second powder cavity 102, and the peripheral surface of the lower mold 301 is clearance-fitted with the side wall of the second powder cavity 102.

[0015] Through the above scheme, the first powder cavity 101 and the second powder cavity 102 in the mold frame 100 of this utility model form a T-shaped longitudinal section, which is suitable for dry pressing to form a T-shaped blank and meets the forming requirements of special shapes. During the dry pressing process, the height of the second powder cavity 102 can be changed by raising or lowering the mold frame 100, thereby changing the total height of the product forming. Under the action of the equipment, the upper mold 201 moves up and down towards the mold frame 100, so that the upper mold 201 and the lower mold 301 press the granular material in the first powder cavity 101 and the second powder cavity 102 respectively. After the upper mold 201 presses for a certain stroke, the upper mold 201 and the mold frame 100 continue to pull down synchronously, and the pull-down rate of the two is the same, with a tendency to press down in the opposite direction relative to the lower mold 301.

[0016] The following are specific embodiments of the present invention.

[0017] This utility model also includes a core rod assembly 400, which includes at least one core rod 401. The core rod 401 moves from bottom to top through the lower mold 301 and the upper mold 201 and is inserted into the mold frame 100. The upper mold 201 and the lower mold 301 are respectively provided with through holes 2011 and 3011 for the core rod 401 to be inserted. The circumferential surface of the core rod 401 is clearance-fitted with the sidewalls of the through holes 2011 and 3011. Thus, the inner cavity of the mold frame 100 is always filled with the core rod 401. During the pressing down of the upper mold 201, the core rod 401 penetrates into the through holes 2011 and 3011, ensuring that the final formed blank has a through hole that runs vertically through the blank, meeting the design requirements of the product. At the same time, the core rod 401 can guide the lifting and lowering movement of the upper mold 201 (the two do not lift and lower simultaneously). In this embodiment, there are two core rods 401 arranged symmetrically on the left and right sides.

[0018] Furthermore, the aforementioned core rod assembly 400 also includes an extension rod 402, an extension rod pressure plate 403, and an extension rod pad 404. The relative position of the extension rod pad 404 and the lower die fixing plate 303 remains fixed and they are parallel, meaning the extension rod pad 404 is also installed on the fixed end of the equipment (i.e., the support rod described below). The lower end of the extension rod 402 is fixed to the extension rod pad 404 via the extension rod pressure plate 403, and its upper end passes through the lower die fixing plate 303 and is detachably connected to the core rod 401 via a threaded connection. This design allows the extension rod 402 to provide stable support for the core rod 401, ensuring the verticality and stability of the core rod 401 during the pressing process, further improving the forming quality of the blank. In actual operation, the length of the extension rod 402 can be adjusted as needed to adapt to the forming requirements of blanks of different heights. Meanwhile, since the lower mold 301 needs to avoid the core rod 401 and the extension rod 402, and the clearance space is relatively large, its structure can be an integrated structure compared to the upper mold 201 + upper mold base 202 structure. Of course, if there are certain requirements for the wall thickness of the lower mold 301, a split structure of lower mold 301 + lower mold base can also be used.

[0019] Secondly, the aforementioned core rod assembly 400 also includes a support rod 405 for supporting the extension rod pad 404, and a support rod fixing plate 406 for fixing the upper end of the support rod 405 to the lower surface of the extension rod pad 404; the lower end of the support rod 405 is installed on the equipment by a threaded connection. The extension rod pressure plate 403, the extension rod pad 404, and the support rod fixing plate 406 are assembled by bolt fastening (see...). Figure 2 (Perforations and screw holes in the middle).

[0020] The specific working steps of this utility model are as follows: (1) The mold frame 100 and the core rod assembly 400 are raised synchronously to the designated position; (2) Weigh the powder filler inside the mold frame 100; (3) The upper module 200 penetrates the mold frame 100 and presses downward for a certain stroke; (4) The upper module 200 and the module frame 100 are pressed down synchronously, and the lower module 300 is pressed in the opposite direction. (5) The upper module 200 returns upward, the mold frame 100 and the core rod group 400 retract downward simultaneously, and push the product upward relative to the lower module 300; (6) Remove the product and repeat the production steps.

[0021] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A T-shaped product dry pressing mold, characterized in that: It includes a mold frame, an upper mold assembly, and a lower mold assembly; the upper mold assembly includes an upper mold, an upper mold base, an upper mold base pressure plate, and an upper mold base fixing plate; the lower mold assembly includes a lower mold, a lower mold pressure plate, and a lower mold fixing plate. The mold frame has a first powder cavity and a second powder cavity arranged coaxially at the top and bottom. The diameter or equivalent diameter of the first powder cavity is larger than that of the second powder cavity, so that a step is formed between the adjacent ends of the two. The upper mold is detachably mounted on the lower end of the upper mold base and fixed on the upper mold fixing plate by the upper mold base pressure plate. The upper mold base fixing plate is mounted on the drive device of the equipment. The upper mold assembly moves up and down relative to the mold frame so that the upper mold is movably fitted in the first powder cavity. The circumferential surface of the upper mold is clearance fitted with the side wall of the first powder cavity. The lower mold fixing plate is mounted on the equipment fixing plate, and the lower mold is fixed on the lower mold fixing plate by the lower mold pressure plate; The mold frame is mounted on the movable plate of the equipment and moves up and down relative to the lower mold so that the lower mold is movably fitted in the second powder cavity, and the circumferential surface of the lower mold is clearance fitted with the side wall of the second powder cavity.

2. The T-shaped dry pressing mold as described in claim 1, characterized in that: It also includes a core rod assembly, which includes at least one core rod; the core rod moves through the lower mold and the upper mold from bottom to top and is inserted into the mold frame; the upper mold and the lower mold are respectively provided with through holes for the core rod to be moved into, and the circumferential surface of the core rod is clearance-fitted with the side wall of the through hole.

3. The T-shaped product dry pressing mold as described in claim 2, characterized in that: The core rod assembly also includes an extension rod, an extension rod pressure plate, and an extension rod pad; the relative position of the extension rod pad and the lower mold fixing plate remains fixed and they are parallel; the lower end of the extension rod is fixed to the extension rod pad through the extension rod pressure plate, and its upper end passes through the lower mold fixing plate and is detachably connected to the core rod.

4. The T-shaped product dry pressing mold as described in claim 3, characterized in that: The core rod assembly also includes a support rod for supporting the extension rod pad, and a support rod fixing plate for fixing the upper end of the support rod to the lower surface of the extension rod pad; the lower end of the support rod is installed on the equipment by means of a threaded connection.

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