Powder dry pressing die

Abstract

The utility model relates to the technical field of ceramic dry pressing forming, and particularly discloses a powder dry pressing die which comprises an upper die plate, a lower die plate, a guide assembly, a base and a die frame, the upper die plate and the lower die plate are oppositely arranged, one end, facing the lower die plate, of the upper die plate is fixedly connected with an upper die core, and two ends of the guide assembly are respectively connected with the upper die plate and the lower die plate. The upper die plate can be close to or away from the lower die plate along the guide assembly, the die frame and the base are detachably connected, the base and the lower die plate are fixedly connected, a powder groove used for containing powder is formed in the end, facing the upper die core, of the die frame, and the upper die core is used for pressing the powder in the powder groove. When small-batch trial production is carried out, the pressed mold frame can be taken down from the mold, and a new mold frame filled with powder in advance is put back to the base, so that the operation convenience is improved, the loading waiting time and the mold changing time are shortened, the proportion of time consumed by mold changing in the small-batch trial production process is reduced, and the trial production and verification progress is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic dry pressing molding, in particular to a powder dry pressing mold. Background Art

[0002] Ceramic products are widely used in modern industry and life, and one of the key links in making ceramic products is the pressing and molding of ceramic powder. A certain amount of ceramic powder is placed in a dry pressing mold, and the powder in the dry pressing mold is pressed by the equipment to form the required ceramic parts. The structure of the dry pressing mold in the prior art is usually more complicated, and non-standard equipment needs to be customized to meet production needs, resulting in high manufacturing and maintenance costs. At the same time, due to the complex structure of the mold in the prior art and the coordination with non-standard equipment, the mold changing method is not flexible enough when switching molds. The mold changing time accounts for a large proportion in small-batch trial production, which will slow down the production and verification progress of the trial production. Utility Model Content

[0003] The utility model aims to provide a powder dry pressing die to solve the problem that the die changing time is relatively long in the existing dry pressing die during small batch trial production.

[0004] The utility model provides a powder dry pressing mold, comprising an upper mold plate, a lower mold plate, a guide component, a base and a mold frame, the upper mold plate and the lower mold plate are arranged opposite to each other, one end of the upper mold plate facing the lower mold plate is fixedly connected with an upper mold core, two ends of the guide component are respectively connected with the upper mold plate and the lower mold plate, the upper mold plate can approach or move away from the lower mold plate along the guide component, the mold frame and the base are detachably connected, the base is fixedly connected with the lower mold plate, one end of the mold frame facing the upper mold core is provided with a powder material trough for containing powder material, the upper mold core is used for pressing the powder material in the powder material trough, the base is provided with a quick-change groove, the mold frame is provided with a positioning block capable of cooperating with the quick-change groove, and the positioning block can slide along the quick-change groove.

[0005] As an optimal technical solution for the powder dry pressing mold, a lower mold core is arranged inside the powder trough, the lower mold core is aligned with the upper mold core, and the lower mold core is slidably matched with the trough wall of the powder trough.

[0006] As a preferred technical solution for the powder dry pressing mold, the bottom wall of the powder trough is provided with a through hole, and the lower mold core is located above the through hole and blocks the through hole.

[0007] As an optimal technical solution for the powder dry pressing mold, it also includes a jacking component, which is located below the lower mold core. The jacking component is fixedly connected to the lower mold plate. The output end of the jacking component passes through the mold frame. The jacking component is used to jack up the lower mold core.

[0008] As the preferred technical solution for the powder dry pressing mold, the lifting assembly includes a driving member and a lifting block. The driving member is fixedly connected to the lower mold plate, and the lifting block is connected to the output end of the driving member. The lifting block is located below the lower mold core and is used to lift the lower mold core.

[0009] As a preferred technical solution for the powder dry pressing mold, the base is provided with a receiving groove, and the driving member is arranged in the receiving groove.

[0010] As an optimal technical solution for the powder dry pressing mold, the guide assembly includes a guide rod, a guide sleeve and a spring. The guide sleeve is mounted on the guide rod, the guide rod and the guide sleeve are slidably connected, the spring is mounted outside the guide sleeve, the guide rod is fixedly connected to one of the upper template and the lower template, the guide sleeve is fixedly connected to the other of the upper template and the lower template, the spring is a compression spring, and the two ends of the spring are respectively connected to the upper template and the lower template.

[0011] As a preferred technical solution for the powder dry pressing die, the length of the spring in a free state is less than the sum of the lengths of the guide rod and the guide sleeve.

[0012] As a preferred technical solution for the powder dry pressing mold, the guide assembly is arranged in the vertical direction, and there are four guide assemblies, which are respectively arranged at the four corners of the lower template.

[0013] The beneficial effects of the utility model are:

[0014] The utility model provides a powder dry pressing mold, in which the mold frame and the base are detachably connected. When conducting small-batch trial production, the mold frame that has completed pressing can be quickly removed from the mold, and a new mold frame pre-filled with powder can be put back into the base, thereby improving the operating convenience, shortening the waiting time for loading and the mold changing time, thereby reducing the proportion of mold changing time in the small-batch trial production process, and ensuring the production and verification progress of the trial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of a powder dry pressing die in an embodiment of the utility model;

[0016] Figure 2 It is an exploded view of the powder dry pressing mold in the embodiment of the utility model.

[0017] In the figure:

[0018] 11. Upper mold plate; 12. Lower mold plate; 2. Driving part; 3. Top block; 4. Base; 41. Quick-change slot; 42. Accommodating slot; 5. Mold frame; 51. Positioning block; 52. Powder slot; 53. Through hole; 6. Lower mold core; 7. Upper mold core; 81. Guide rod; 82. Guide sleeve; 83. Spring. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solution of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] like Figure 1-Figure 2As shown, the utility model provides a powder dry pressing mold, including an upper template 11, a lower template 12, a guide assembly, a base 4 and a mold frame 5. The upper template 11 and the lower template 12 are arranged opposite to each other, and the upper template 11 is fixedly connected to the upper mold core 7 at one end facing the lower template 12. The two ends of the guide assembly are respectively connected to the upper template 11 and the lower template 12. The upper template 11 can approach or move away from the lower template 12 along the guide assembly. The mold frame 5 and the base 4 are detachably connected, and the base 4 is fixedly connected to the lower template 12. A powder trough 52 for holding powder is provided at one end of the mold frame 5 facing the upper mold core 7, and the upper mold core 7 is used to press the powder in the powder trough 52. The mold frame 5 and the base 4 are detachably connected. When conducting small-batch trial production, the mold frame 5 that has been pressed can be quickly removed from the mold, and the new mold frame 5 pre-filled with powder can be put back into the base 4, which improves the convenience of operation, shortens the waiting time for loading and the mold changing time, thereby reducing the proportion of time spent on mold changing during small-batch trial production and ensuring the production and verification progress of the trial production.

[0024] Specifically, Figure 1-Figure 2 As shown, the base 4 is provided with a quick-change groove 41, and the quick-change groove 41 is set as an inverted T-shaped structure. Both sides of the bottom end of the mold frame 5 are protruding outward with positioning blocks 51 that can cooperate with the quick-change groove 41. The positioning blocks 51 are in contact with the inner side walls and step walls of the quick-change groove 41, so that the positioning blocks 51 can only slide along the quick-change groove 41 to achieve the fixation of the relative position relationship between the mold frame 5 and the base 4. When the powder in the mold frame 5 is pressed, in order to prevent the mold frame 5 from sliding along the quick-change groove 41 and affecting production, a locking screw (not shown in the figure) can also be set on the base 4 to ensure that the mold frame 5 does not move during the pressing process. When the mold frame 5 needs to be disassembled or replaced, the locking screw is loosened to slide the mold frame 5 along the quick-change groove 41 to remove the mold frame 5. The mold frame 5 in this embodiment can be set to multiple according to the production needs of small batch trial production.

[0025] Furthermore, a lower mold core 6 is provided inside the powder trough 52, and the lower mold core 6 is aligned with the upper mold core 7, and the lower mold core 6 is used to cooperate with the upper mold core 7 to press the powder in the powder trough 52. The lower mold core 6 is slidably matched with the groove wall of the powder trough 52. Specifically, the outer wall of the lower mold core 6 is in contact with the inner wall of the powder trough 52, and the outer wall of the upper mold core 7 is in contact with the inner wall of the powder trough 52. During the pressing process, the upper mold core 7 moves downward under the action of the press to press the powder. After the upper mold core 7 reaches the preset position, it is kept under pressure for a certain period of time, so that the product of the desired shape is pressed under the joint action of the upper mold core 7, the lower mold core 6 and the mold frame 5. Since the outer walls of the upper mold core 7 and the lower mold core 6 are in contact with the inner wall of the powder trough 52, during the pressing process, there is no gap between the upper mold core 7 and the lower mold core 6 and the inner wall of the powder trough 52, so as to avoid powder overflow. When demolding the product, the lower mold core 6 is slid along the inner wall of the powder groove 52, so that the pressed product is ejected from the powder groove 52, and the product is demolded.

[0026] Specifically, the bottom wall of the powder trough 52 is provided with a through hole 53, and the lower mold core 6 is located above the through hole 53 and blocks the through hole 53. When the powder is pressed, the lower mold core 6 fits with the inner side wall of the powder trough 52 to ensure that the powder will not overflow from the through hole 53 on the bottom wall of the powder trough 52. The through hole 53 is provided on the bottom wall of the powder trough 52. When the product is demolded, the lifting member can push the lower mold core 6 to slide along the inner side wall of the powder trough 52 through the through hole 53, thereby reducing the difficulty of demolding the product.

[0027] Furthermore, if Figure 1-Figure 2 As shown, the powder dry pressing mold is also provided with a lifting assembly, which is located below the lower mold core 6, and the lifting assembly is fixedly connected to the lower mold plate 12. The output end of the lifting assembly passes through the mold frame 5, and the lifting assembly is used to lift the lower mold core 6. By setting the lifting assembly to lift the lower mold core 6, it is achieved that the pressing and demolding are completed at one time on the powder dry pressing mold, thereby improving production efficiency. The lifting assembly includes a driving member 2 and a top block 3. In this embodiment, the driving member 2 is preferably a cylinder. The driving member 2 is fixedly connected to the lower mold plate 12, and the top block 3 is connected to the output end of the driving member 2. The top block 3 is located below the lower mold core 6 and the top block 3 is aligned with the through hole 53 of the mold frame 5. When demolding is required, the driving member 2 drives the top block 3 to move upward, and the top block 3 is used to lift the lower mold core 6.

[0028] Optionally, a receiving groove 42 is provided on the base 4, and the driving member 2 is arranged in the receiving groove 42, so as to reduce the space occupied by the driving member 2 in the height direction while ensuring the structural strength of the base 4, so that the structure of the powder dry pressing mold is more compact.

[0029] Furthermore, if Figure 1-Figure 2As shown, the guide assembly includes a guide rod 81, a guide sleeve 82 and a spring 83, and the guide sleeve 82 is sleeved on the guide rod 81. The guide rod 81 and the guide sleeve 82 are slidably connected, and the spring 83 is sleeved on the outside of the guide sleeve 82. The guide rod 81 is fixedly connected to one of the upper template 11 and the lower template 12, and the guide sleeve 82 is fixedly connected to the other of the upper template 11 and the lower template 12. Since the outer diameter of the guide sleeve 82 is larger than the outer diameter of the guide rod 81, in this embodiment, it is preferred to fix the guide sleeve 82 with the upper template 11, and the guide rod 81 is fixedly connected with the lower template 12, so as to avoid dust from entering the guide sleeve 82 from the intersection of the guide sleeve 82 and the guide rod 81 and causing wear. The spring 83 is set as a compression spring 83, and the two ends of the spring 83 are respectively connected to the upper template 11 and the lower template 12. When the powder dry pressing mold is in a stationary state, the compression spring 83 supports the upper template 11 and the upper mold core 7, so that a certain distance is maintained between the upper mold core 7 and the lower mold core 6 for personnel operation. In other embodiments, the guide assembly can also be configured as a hydraulic support rod, and the two ends of the hydraulic support rod are respectively connected to the upper template 11 and the lower template 12, which can also support the upper template 11 in a stationary state and guide the upper template 11 when it moves downward. The structure of the hydraulic support rod is a prior art in the field and is not described in detail here.

[0030] Specifically, the guide assembly is arranged in the vertical direction, and there are four guide assemblies, which are respectively arranged at the four corners of the lower template 12, thereby further improving the stability of the upper template 11 during the movement. At the same time, the length of the spring 83 in the free state is less than the sum of the lengths of the guide rod 81 and the guide sleeve 82, ensuring that the guide sleeve 82 can always be sleeved outside the guide rod 81, avoiding the guide sleeve 82 and the guide rod 81 from being separated.

[0031] Optionally, in the process of pressing ceramic powder using the powder dry pressing mold in this embodiment, the upper mold core 7, the lower mold core 6 and the mold frame 5 jointly determine the shape of the final pressed product. To facilitate demolding of the product, the upper mold core 7, the lower mold core 6 and the mold frame 5 are all made of wear-resistant metal, and the surfaces in contact with the powder are mirror-finished. The materials of the upper mold core 7, the lower mold core 6 and the mold frame 5 include Cr12, SKD11 and other materials, and the hardness is made to reach HRC56-HRC58 through heat treatment, so as to prevent repeated pressing of the product from causing excessive wear.

[0032] It should be pointed out that in the process of pressing and molding the ceramic powder, the total weight of the ceramic powder remains unchanged during the whole process. Therefore, the volume of the ceramic powder in a loose state required for the product can be calculated by the final product weight and the density of the ceramic powder in a loose state through the existing mass formula, and the volume of the powder trough 52 of the mold frame 5 is set to the sum of the volume of the ceramic powder in a loose state required for the product and the volume of the lower mold core 6. Therefore, each time the material is loaded, the ceramic powder in a loose state fills the mold frame 5 and can be pressed into the required product without weighing the bulk material or measuring the volume in advance.

[0033] When using the powder dry pressing mold in this embodiment for production, first fill the powder groove 52 of the mold frame 5 with powder, then position and install the mold frame 5 on the base 4, start the hydraulic press, and press the pressure head of the hydraulic press to the preset position and maintain the pressure for the preset time, driving the upper mold plate 11 to move downward along the direction of the guide assembly, while the guide sleeve 82 moves downward relative to the guide rod 81, and the spring 83 is compressed. After the product is pressed and formed, the pressure head of the hydraulic press moves upward, and the upper mold plate 11 moves upward along the direction of the guide assembly under the elastic force of the spring 83, while the guide sleeve 82 moves upward relative to the guide rod 81, and the upper mold core 7 and the mold frame 5 are out of contact. Turn on the drive member 2, and the drive member 2 lifts the lower mold core 6 along the inner side wall of the powder groove 52 through the top block 3, so that the product is removed from the powder groove 52, and the product is taken out. Remove the mold frame 5, refill the powder and repeat the above steps to realize the cycle production.

[0034] Optionally, in the actual production process, multiple mold frames 5 and lower mold cores 6 can be set according to demand. When one of the mold frames 5 is assembled to the powder dry pressing mold to press the product, the next mold frame 5 with the lower mold core 6 inside is pre-filled with ceramic powder. After the product is demolded, the mold frame 5 is removed, and the mold frame 5 pre-filled with ceramic powder is assembled to the powder dry pressing mold, and it can be pressed again without waiting for the powder to be refilled, thereby improving production efficiency. Similarly, when it is necessary to produce products of different specifications, it is only necessary to continue to replace the upper mold core 7 of the corresponding specifications on this basis to complete the switching of products of different specifications, thereby improving switching efficiency.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Powder dry pressing mold, characterized in that: include: An upper mold plate (11) and a lower mold plate (12), wherein the upper mold plate (11) and the lower mold plate (12) are arranged opposite to each other, and an upper mold core (7) is fixedly connected to one end of the upper mold plate (11) facing the lower mold plate (12); A guide assembly, wherein two ends of the guide assembly are respectively connected to the upper template (11) and the lower template (12), and the upper template (11) can move closer to or farther from the lower template (12) along the guide assembly; A base (4) and a mold frame (5), wherein the mold frame (5) and the base (4) are detachably connected, the base (4) is fixedly connected to the lower mold plate (12), the mold frame (5) is provided with a powder trough (52) for containing powder at one end facing the upper mold core (7), the upper mold core (7) is used to press the powder in the powder trough (52), the base (4) is provided with a quick-change groove (41), the mold frame (5) is provided with a positioning block (51) capable of cooperating with the quick-change groove (41), and the positioning block (51) can slide along the quick-change groove (41).

2. The powder dry pressing mold according to claim 1, characterized in that: A lower mold core (6) is arranged inside the powder trough (52), the lower mold core (6) is aligned with the upper mold core (7), and the lower mold core (6) is slidably matched with the trough wall of the powder trough (52).

3. The powder dry pressing mold according to claim 2, characterized in that: The bottom wall of the powder trough (52) is provided with a through hole (53), and the lower mold core (6) is located above the through hole (53) and blocks the through hole (53).

4. The powder dry pressing mold according to claim 3, characterized in that: It also includes a lifting component, which is located below the lower mold core (6), the lifting component is fixedly connected to the lower mold plate (12), the output end of the lifting component passes through the mold frame (5), and the lifting component is used to lift the lower mold core (6).

5. The powder dry pressing mold according to claim 4, characterized in that: The lifting assembly comprises a driving member (2) and a lifting block (3); the driving member (2) is fixedly connected to the lower mold plate (12); the lifting block (3) is connected to the output end of the driving member (2); the lifting block (3) is located below the lower mold core (6); and the lifting block (3) is used to lift the lower mold core (6).

6. The powder dry pressing mold according to claim 5, characterized in that: The base (4) is provided with a receiving groove (42), and the driving member (2) is arranged in the receiving groove (42).

7. The powder dry pressing mold according to claim 1, characterized in that: The guide assembly comprises a guide rod (81), a guide sleeve (82) and a spring (83); the guide sleeve (82) is sleeved on the guide rod (81); the guide rod (81) and the guide sleeve (82) are slidably connected; the spring (83) is sleeved outside the guide sleeve (82); the guide rod (81) is fixedly connected to one of the upper template (11) and the lower template (12); the guide sleeve (82) is fixedly connected to the other of the upper template (11) and the lower template (12); the spring (83) is a compression spring (83); two ends of the spring (83) are respectively connected to the upper template (11) and the lower template (12).

8. The powder dry pressing mold according to claim 7, characterized in that: The length of the spring (83) in a free state is less than the sum of the lengths of the guide rod (81) and the guide sleeve (82).

9. The powder dry pressing mold according to any one of claims 1 to 8, characterized in that: The guide assembly is arranged along the vertical direction, and there are four guide assemblies, which are respectively arranged at the four corners of the lower template (12).

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