CN112264615B

CN112264615B - Powder paving device

Info

Publication number: CN112264615B
Application number: CN202011091873.XA
Authority: CN
Inventors: 徐伟伟; 闫国栋; 杨迪
Original assignee: Nanjing Institute of Technology
Current assignee: Nanjing Institute of Technology
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2023-04-07
Anticipated expiration: 2040-10-13
Also published as: CN112264615A

Abstract

The invention discloses a powder spreading device, which comprises a base, an anti-skid block, a die, a lower pressure head, a hopper opening limiting inserting plate, a hopper turntable, a nut, an upper pressure head fixing device, an upper pressure head and a hopper turntable support, wherein: the base top sets up mould and hopper carousel support, and hopper carousel support top sets up the hopper carousel, sets up hopper and last pressure head fixing device on the hopper carousel, and the hopper below sets up hopper opening restriction picture peg, goes up pressure head fixing device and goes up the upper pressure head through the nut, is equipped with the direction mouth on the base, sets up the non slipping spur in the direction mouth, and the non slipping spur top sets up down the pressure head, and the pressure head upper end extends to the mould hole down. The invention can realize the powder layer-by-layer laying in the powder forming process at the early stage of powder sintering, is suitable for preparing laminated materials, can control the thickness of each layer of powder and improves the forming quality of biscuit.

Description

Powder paving device

Technical Field

The invention belongs to the technical field of powder sintering, and particularly relates to a powder paving device.

Background

Powder sintering is a process of pressing powder or powder into a compact, and when the powder or powder is heated to a temperature lower than the melting point of main components, the physical and chemical actions such as bonding and the like occur among particles to obtain a material or a product with required strength and characteristics. The forming process is a crucial link, the forming quality of the biscuit directly influences the performance of a sintered finished product, and the powder press forming is the most common forming mode.

Powder pressing forming is a powder forming method utilizing external pressure in a press film, powder is usually directly injected into the press film, a unidirectional or bidirectional pressurizing mode is adopted, the method is simple to operate, rapid and efficient, but due to the fact that the powder is directly injected, the powder is not uniformly distributed, density difference exists in the height direction, and forming quality of a biscuit is affected. In addition, for some laminated materials, because of the synthesis of multiple layers of different powders, how to lay each layer of powder with high efficiency and high quality is also a problem to be solved.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problems in the prior art, the invention discloses a powder laying device which can lay powder layer by layer in the powder forming process at the early stage of powder sintering, is suitable for preparing laminated materials, can control the thickness of each layer of powder and improves the forming quality of biscuit.

The technical scheme is as follows: the invention adopts the following technical scheme: the utility model provides a spread powder device, its characterized in that includes base, non slipping spur, mould, lower pressure head, hopper opening restriction picture peg, hopper carousel, goes up pressure head fixing device, goes up pressure head and hopper carousel support, wherein:

the base is provided with a guide opening, an anti-skid block is arranged in the guide opening, and a lower pressing head is arranged above the anti-skid block;

a mould and a hopper turntable support are arranged above the base, the mould is provided with an inner hole which is communicated up and down, and the upper end of the lower pressure head extends into the inner hole of the mould;

a hopper turntable is arranged above the hopper turntable support, a hopper and an upper pressure head fixing device are arranged on the hopper turntable, a hopper opening limiting insertion plate for sealing or opening a powder outlet of the hopper is arranged at the bottom of the hopper, and a discharge hole is formed in the hopper opening limiting insertion plate; the upper pressure head fixing device is provided with an upper pressure head which can move up and down;

the hopper turntable is rotated to enable the center of the inner hole of the die and the center of the hopper powder outlet or the upper pressure head to be positioned on the same vertical line.

Preferably, the upper pressure head fixing device is provided with a nut which is marked with scales and can rotate, the upper end of the upper pressure head is connected with a screw rod with threads, and the screw rod is in threaded connection with the nut.

Preferably, the bottom of the hopper is provided with a clamping groove, two ends of the clamping groove are respectively provided with a limiting groove, and the opening of the hopper limits the insertion plate to slide in the clamping groove between the limiting grooves.

Preferably, the friction resistance of the antiskid blocks and the inner wall of the guide opening is 20-25N.

Preferably, the die and the base are connected and positioned by positioning pins.

Preferably, the cross section of the antiskid block, the cross section of the base guide port, the cross section of the lower pressure head, the cross section of the upper pressure head, the inner hole of the die, the powder outlet of the hopper and the discharging hole of the hopper opening limiting inserting plate are the same in shape and size; the center of the base guide port and the center of the inner hole of the die are positioned on the same vertical line.

Preferably, a plurality of hoppers and upper pressure head fixing devices are uniformly distributed on the hopper rotating disc at equal angles, and the hoppers and the upper pressure head fixing devices are distributed at intervals.

Has the advantages that: the invention has the following beneficial effects:

the powder layer-by-layer paving method can realize the powder layer-by-layer paving in the powder forming process at the earlier stage of powder sintering, is suitable for preparing gradient laminated materials, can control the thickness of each layer of powder, and improves the forming quality of biscuit.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

the anti-skid device comprises a base 1, an anti-skid block 2, a mold 3, a lower pressure head 4, a hopper opening limiting inserting plate 5, a hopper 6, a hopper turntable 7, a nut 8, an upper pressure head fixing device 9, an upper pressure head 10, a hopper turntable support 11 and a screw 12.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The invention discloses a powder spreading device, which comprises a base 1, an anti-skid block 2, a mold 3, a lower pressure head 4, a hopper opening limiting inserting plate 5, a hopper 6, a hopper turntable 7, a nut 8, an upper pressure head fixing device 9, an upper pressure head 10 and a hopper turntable support 11, as shown in figures 1 to 3.

The base 1 is opened there is the guide way, sets up non slipping spur 2 in the guide way, and non slipping spur 2 top sets up down pressure head 4. Base 1 top sets up mould 3 and hopper carousel support 11, and wherein, mould 3 is equipped with the hole that link up from top to bottom, and 4 upper ends on the lower pressure head extend to mould 3 holes, and mould 3 fixes a position through two locating pins with base 1.

Set up hopper carousel 7 on the hopper carousel support 11, the even equidistance sets up three hopper 6 and three pressure head fixing device 9 on the hopper carousel 7, and hopper 6 and last pressure head fixing device 9 interval distribution, wherein, can store different powder in different hopper 6, can realize that the successive layer of different powder is laid.

The bottom of the hopper 6 is provided with a clamping groove, two ends of the clamping groove are respectively provided with a limiting groove, the hopper opening limiting insertion plate 5 can slide in the clamping groove between the limiting grooves, and the limiting function can not be realized by pulling when the hopper opening limiting insertion plate 5 is pulled to the limiting grooves. The hopper opening limiting insertion plate 5 is provided with a discharge hole, the discharge hole of the hopper opening limiting insertion plate 5 is the same as the powder outlet of the hopper 6 in shape and size, and when the hopper opening limiting insertion plate 5 is pulled to one of the limiting grooves, the discharge hole is overlapped with the powder outlet, so that powder can be discharged; when the hopper opening limiting inserting plate 5 is pulled to another limiting groove, the powder outlet of the hopper 6 can be sealed.

Go up and be equipped with rotatable nut 8 in the pressure head fixing device 9, go up pressure head 10 top and connect the upper end threaded screw rod, screw rod and 8 threaded connection of nut to on going up pressure head 10 and being connected to pressure head fixing device 9, the scale has been marked on the nut 8, can realize going up the upper and lower distance removal of pressure head 10 through rotating nut 8.

When rotating hopper carousel 7 to a certain position, can make the center of 3 holes of mould just be located same vertical line with the play powder mouth of hopper 6, when rotating hopper carousel 7 to another position once more, can make the center of 3 holes of mould just be located same vertical line with the center of last pressure head 10, consequently, the powder in the hopper 6 can be through going out the accurate hole that falls into mould 3 of powder mouth, goes up pressure head 10 and also can move down and compress tightly the powder in getting into mould 3's the hole.

The cross section of the lower pressing head 4 and the cross section of the upper pressing head 10 are the same as the shape and the size of the inner hole of the die 3, so that the lower pressing head 4 and the upper pressing head 10 can enter the inner hole of the die 3, and the powder in the inner hole of the die 3 can be pressed in an all-round mode.

The shape size of the discharge opening of the powder outlet of the hopper 6, the discharge opening of the hopper opening limiting insertion plate 5 and the inner hole of the mould 3 are the same, so that when the discharge opening of the hopper 6 and the discharge opening of the hopper opening limiting insertion plate 5 are overlapped, the powder can be basically tiled on the upper surface of the lower pressure head 4 after falling down, and the condition that the powder thickness is too large cannot be caused.

The cross section of the antiskid block 2 is the same as the shape and size of the guide opening of the base 1, the frictional resistance between the antiskid block 2 and the inner wall of the guide opening is 20-25N, and the downward sliding of the lower pressing head can be limited, so that when the pressure applied when the upper pressing head 10 moves downwards is small, the antiskid block 2 and the lower pressing head 4 can keep the positions unchanged, and the powder is compacted; when the upper pressing head 10 moves downwards, the applied pressure is larger, the anti-skid blocks 2 and the lower pressing head 4 move downwards simultaneously, and a space is reserved for the powder to be laid on the next layer.

Preferably, the center of the guide opening of the base 1 and the center of the inner hole of the die 3 are positioned on the same vertical line, and the shape and the size of the guide opening of the base 1 and the inner hole of the die 3 are also the same.

The working method of the invention is as follows:

firstly, rotating a hopper turntable 7 to align a powder outlet of a hopper 6 with an inner hole of a mold 3, pulling a hopper opening limiting insertion plate 5 after aligning, enabling a discharge hole of the hopper opening limiting insertion plate 5 to coincide with the powder outlet of the hopper 6, and enabling powder to fall under the action of gravity and be laid on the upper surface of a lower pressing head 4 in the inner hole of the mold 3;

after the powder is laid on one layer, the hopper turntable 7 is rotated to enable the upper pressure head 10 to be aligned with the inner hole of the die 3, the nut 8 is rotated to enable the upper pressure head 4 to press the freshly laid powder layer downwards, and the positions of the anti-skid block 2 and the lower pressure head 4 are unchanged;

after the powder layer is compacted, the nut 8 is continuously rotated to enable the upper pressure head 4 to be pressed downwards, the anti-skid block 2 and the lower pressure head 4 move downwards for a certain distance at the moment, a space for spreading powder on the next layer is reserved, and the distance for the anti-skid block 2 and the lower pressure head 4 to move downwards can be obtained through the scales on the nut 8;

after a space for spreading the powder on the next layer is reserved, the nut 8 is rotated to enable the upper pressure head 4 to move upwards, then the hopper turntable 7 is continuously rotated to enable the next hopper 6 to rotate to the position of the die 3, and the process is repeated to spread the powder layer by layer.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. The utility model provides a spread powder device, its characterized in that includes base (1), non slipping spur (2), mould (3), lower pressure head (4), hopper opening restriction picture peg (5), hopper (6), hopper carousel (7), goes up pressure head fixing device (9), goes up pressure head (10) and hopper carousel support (11), wherein:

the base (1) is provided with a guide opening, an anti-skid block (2) is arranged in the guide opening, the frictional resistance between the anti-skid block (2) and the inner wall of the guide opening is 20-25N, and a lower pressure head (4) is arranged above the anti-skid block (2);

a die (3) and a hopper turntable support (11) are arranged above the base (1), the die (3) is provided with an inner hole which is communicated up and down, and the upper end of the lower pressure head (4) extends into the inner hole of the die (3);

a hopper turntable (7) is arranged above a hopper turntable support (11), a hopper (6) and an upper pressure head fixing device (9) are arranged on the hopper turntable (7), wherein a plurality of hoppers (6) and upper pressure head fixing devices (9) are uniformly distributed on the hopper turntable (7) at equal angles, the hoppers (6) and the upper pressure head fixing devices (9) are distributed at intervals, a hopper opening limiting insertion plate (5) used for sealing or opening a powder outlet of the hopper (6) is arranged at the bottom of the hopper (6), and a discharge hole is formed in the hopper opening limiting insertion plate (5); an upper pressure head (10) which can move up and down is arranged on the upper pressure head fixing device (9); a nut (8) which is marked with scales and can rotate is arranged in the upper pressure head fixing device (9), a screw rod (12) with threads at the upper end is connected above the upper pressure head (10), and the screw rod (12) is connected with the nut (8) through threads;

the hopper turntable (7) is rotated to ensure that the center of the inner hole of the die (3) and the center of the powder outlet of the hopper (6) or the upper pressure head (10) are positioned on the same vertical line.

2. The powder spreading device as claimed in claim 1, wherein a clamping groove is formed in the bottom of the hopper (6), limiting grooves are respectively formed in two ends of the clamping groove, and the hopper is opened to limit the insertion plate (5) to slide in the clamping groove between the limiting grooves.

3. A dusting device according to claim 1, characterized in that the connection and positioning between the mould (3) and the base (1) is performed by means of positioning pins.

4. The powder spreading device as claimed in claim 1, wherein the cross section of the anti-skid block (2), the guide opening of the base (1), the cross section of the lower pressure head (4), the cross section of the upper pressure head (10), the inner hole of the die (3), the powder outlet of the hopper (6) and the discharge hole of the hopper opening limiting insert plate (5) have the same shape and size; the center of the guide opening of the base (1) and the center of the inner hole of the die (3) are positioned on the same vertical line.