CN219466471U - High-density pyrophyllite block forming die - Google Patents

Abstract

The utility model discloses a high-density pyrophyllite block forming die, which comprises a cuboid middle die, wherein a square die cavity is arranged in the middle die, square guide holes which vertically lead to the square die cavity are formed in the upper end face, the lower end face and four side faces of the middle die, an upper die and a lower die are respectively arranged in the square guide holes of the upper end face and the lower end face of the middle die, four side dies are respectively arranged in the square guide holes of the four side faces of the middle die, the die head shapes of the upper die, the lower die and the four side dies are matched with the six-face shape of a pyrophyllite block to be pressed, a cylindrical structure is arranged in the middle of the die head of the upper die, a cylindrical through hole which vertically penetrates through the lower die is formed in the lower die, and the cylindrical structure of the upper die and the cylindrical through hole of the lower die share the central axis, and the diameters of the cylindrical structure of the upper die and the cylindrical through hole of the lower die are the same; the method can conveniently and rapidly press the cubic pyrophyllite blocks with the prefabricated sealing edges and uniform density, effectively improves the pressing efficiency and effectively reduces the labor intensity.

Description

High-density pyrophyllite block forming die

Technical Field

The utility model relates to the technical field of pyrophyllite block pressing, in particular to a high-density pyrophyllite block forming die.

Background

In the superhard material industry, when diamond, cubic boron nitride single crystal or sintered body thereof is synthesized by utilizing a static high-temperature high-pressure technology, a commonly adopted pressure transmission medium is a cubic pyrophyllite block. The cubic pyrophyllite block generates about 5.5GPa of ultrahigh pressure in a high-pressure cavity, can meet the requirements of producing diamond and cubic boron nitride monocrystal, but cannot meet the requirements of high-quality diamond or cubic boron nitride sintered body.

For obtaining higher cavity pressure, chinese patent application number CN201420755142.4 discloses a pyrophyllite assembly block for ultrahigh pressure synthesis, including the cube pyrophyllite block with prefabricated sealing edges in the middle part of the cube pyrophyllite block with cylindrical high pressure cavity, six sides of the pyrophyllite block all set up the recess, form prefabricated sealing edges between the recess of adjacent both sides face, the bottom of each recess still downwards set up the pressure boost recess, the longitudinal section of pressure boost recess is isosceles trapezoid, and the transverse cross-section area of pressure boost recess reduces along with the increase of pressure boost recess degree of depth, the pressure boost recess in be equipped with the pressure boost piece of matching laminating. The pressure of the high-pressure cavity of the pyrophyllite assembly block can reach more than 8GPa, and the physical and mechanical properties of the diamond sintered body or the cubic boron nitride sintered body can be effectively improved.

The cube pyrophyllite block with the prefabricated sealing edge designed by the patent has the problem of difficult compression molding. At present, one method commonly used is manual multiple press molding by using a split die. The manual pressing process requires assembling the die first, and then disassembling and demolding the die after pressing on a single-pressure source press. The manual pressing on the single-pressure source press is restricted in the aspects of feeding accuracy, pressing efficiency and the like, and the problems of high manual labor intensity and low pressing efficiency exist. And the six-sided pressure of the special-shaped pyrophyllite block is easy to be uneven when being pressed on a single pressure source press, and the conditions of uneven density, size fluctuation, block falling, breakage and the like of the pyrophyllite block are easy to be caused. The non-uniform density of pyrophyllite blocks will affect the pressure transmission effect, and cause quality problems of the synthesized high-quality diamond or cubic boron nitride sintered body.

Disclosure of Invention

The utility model aims to provide a high-density pyrophyllite block forming die which can conveniently and rapidly press a cubic pyrophyllite block with uniform density and prefabricated sealing edges, effectively improves the pressing efficiency and effectively reduces the labor intensity.

The utility model is realized in the following way: the high-density pyrophyllite block forming die comprises a middle die, wherein a die cavity is arranged in the middle die, and six pressing dies capable of pressing the die cavity up, down, left, right, front, back and the like are further included, and the six pressing dies are used for pressing the cubic pyrophyllite blocks with high density and prefabricated sealing edges in the die cavity in a mode of pressing in six directions.

Optionally, the six pressing dies are respectively an upper pressing die, a lower pressing die and four side pressing dies at front, back, left and right; square guide holes which are vertically led into the square die cavity are formed in the upper end face, the lower end face and the four side faces of the middle die, the upper die and the lower die are respectively arranged in the square guide holes of the upper end face and the lower end face of the middle die, and the four side dies are respectively arranged in the square guide holes of the four side faces of the middle die; the shape of the die head parts of the upper pressing die, the lower pressing die and the four side pressing dies is matched with the six-face shape of the pyrophyllite block to be pressed, a cylindrical structure is arranged in the middle of the die head part of the upper pressing die, a cylindrical through hole penetrating the lower pressing die vertically is formed in the lower pressing die, and the cylindrical structure of the upper pressing die and the cylindrical through hole of the lower pressing die are concentric in central axis and identical in diameter.

Optionally, the upper pressing die, the lower pressing die and the side pressing die are all of T-shaped structures and comprise a pressing head block part and a die head block part, the width of the die head block part is smaller than that of the pressing head block part, the die head block part is inserted into the square guide hole, and the pressing head block part is positioned at the outer side of the middle die.

Optionally, chamfer or fillet structures are arranged on the left and right sides of the die head block part of the side pressing die, so that the die head block parts of the peripheral side pressing die are prevented from collision during pressing.

Optionally, the die head piece portion is provided with first boss in the middle part of the terminal surface that keeps away from the pressure head piece portion, the middle part position of first boss is provided with the second boss.

Optionally, the shape of the first boss and the second boss is any one of a square frustum shape or a conical frustum shape, and the size of the second boss is smaller than that of the first boss.

Optionally, chamfer structures are arranged on four sides of the middle die, the middle die consists of an upper middle die and a lower middle die, the upper middle die and the lower middle die are symmetrically arranged, and positioning columns and positioning holes are respectively arranged on the joint surfaces of the upper middle die and the lower middle die; four threaded holes are uniformly formed in the upper end face of the lower middle die along the circumferential direction of the upper end face of the lower middle die, two-stage stepped connecting through holes which are in one-to-one correspondence with the four threaded holes of the lower middle die are formed in the upper middle die, the upper middle die and the lower middle die are connected through inner hexagon bolts, and the inner hexagon bolts are arranged in the two-stage stepped connecting through holes of the upper middle die and the threaded holes of the lower middle die.

Compared with the prior art, the utility model has the beneficial effects that: 1. the method can conveniently and rapidly press the cubic pyrophyllite blocks with the prefabricated sealing edges and uniform density, effectively improves the pressing efficiency and effectively reduces the labor intensity. 2. The left and right sides of the die head block part of the side pressing die are provided with chamfer or round corner structures, so that the damage caused by collision of the die head block parts of the side pressing die around during pressing can be prevented.

Drawings

FIG. 1 is a schematic perspective view of embodiment 1 of the present utility model;

fig. 2 is a front view of embodiment 1 of the present utility model;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a schematic perspective view of embodiment 2 of the present utility model;

FIG. 5 is a schematic view of a side die of an embodiment of the utility model;

fig. 6 is another structural schematic diagram of a side die of an embodiment of the present utility model.

In the figure: 1. middle mold; 101. an upper middle mold; 102. a lower middle die; 103. the second-stage step is connected with the through hole; 2. performing upper pressing; 3. pressing down the die; 4. a side press mold; 5. a ram block section; 6. a die block section; 601. a first boss; 602. and a second boss.

The specific embodiment is as follows:

in the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following is further described with reference to the accompanying drawings and specific examples:

example 1

The high-density pyrophyllite block forming die comprises a cuboid middle die 1, and chamfer structures are arranged on four sides of the middle die 1 as shown in figures 1, 2 and 3. The middle die 1 is provided with a square die cavity, and square guide holes which vertically open into the square die cavity are formed in the upper end face, the lower end face and the four side faces of the middle die 1. The upper die 2 and the lower die 3 are respectively arranged in square guide holes of the upper end face and the lower end face of the middle die 1, and four side dies 4 are respectively arranged in square guide holes of four sides of the middle die 1.

As shown in fig. 1, 3, 5 and 6, the upper die 2, the lower die 3 and the side die 4 are all in T-shaped structures, and include a ram block 5 and a die block 6, the width of the die block 6 is smaller than that of the ram block 5, the size of the die block 6 is the same as that of the square guide hole, the die block 6 is inserted into the square guide hole, and the ram block 5 is located outside the middle die 1. The left and right sides of the die block part 6 of the side pressing die 4 are provided with chamfer or round corner structures, so that damage caused by collision of the die block part 6 of the peripheral side pressing die 4 during pressing can be prevented. The die head block part 6 is provided with first boss 601 in the middle part of the terminal surface that keeps away from pressure head block part 5, and the middle part position of first boss 601 is provided with second boss 602, and the shape of first boss 601 and second boss 602 matches with the six shape of the pyrophyllite piece that will press. Specifically, the first boss 601 and the second boss 602 may have any one of a square frustum shape and a truncated cone shape. As shown in fig. 5, the first boss 601 has a square truncated cone shape, and the second boss 602 has a truncated cone shape. As shown in fig. 6, the first boss 601 and the second boss 602 are both truncated cone-shaped. Further, the first boss 601 and the second boss 602 may each have a square frustum shape or the like. The size of the second boss 602 is smaller than the size of the first boss 601, for example, when the shapes of the first boss 601 and the second boss 602 are both in a truncated cone shape, the diameter of the second boss 602 is smaller than the diameter of the first boss 601, for example, when the shape of the first boss 601 is in a truncated square cone shape and the shape of the second boss 602 is in a truncated cone shape, the diameter of the second boss 602 is smaller than the width of the first boss 601. The middle part of the upper pressing die 2 die head is provided with a cylindrical structure, and a cylindrical high-pressure cavity of the cubic pyrophyllite block disclosed in the Chinese patent application No. CN201420755142.4 described in the background art can be manufactured. The lower die 3 is provided with a cylindrical through hole penetrating the lower die 3 up and down, the cylindrical structure of the upper die 2 and the cylindrical through hole of the lower die 3 are concentric with each other and have the same diameter, and the material pressed out by the die head part of the upper die 2 can be discharged from the cylindrical through hole of the lower die 3.

Example 2

As shown in fig. 4, the difference between the embodiment and the embodiment 1 is that the middle mold 1 of the embodiment is composed of an upper middle mold 101 and a lower middle mold 102, the upper middle mold 101 and the lower middle mold 102 are symmetrically arranged, and positioning columns and positioning holes are respectively arranged on the joint surfaces of the upper middle mold 101 and the lower middle mold 102, so that the upper middle mold 101 and the lower middle mold 102 can be conveniently closed. Four threaded holes are uniformly formed in the upper end face of the lower middle die 102 along the circumferential direction of the upper end face, two-stage stepped connecting through holes 103 which are in one-to-one correspondence with the four threaded holes of the lower middle die 102 are formed in the upper middle die 101, the two-stage stepped connecting through holes 103 comprise an upper cylindrical hole and a lower cylindrical hole which are coaxial with each other, and the diameter of the lower cylindrical hole is smaller than that of the upper cylindrical hole. The upper middle die 101 and the lower middle die 102 are connected by a socket head cap bolt which is installed in a secondary step connection through hole 103 of the upper middle die 101 and a threaded hole of the lower middle die 102. The middle die 1 is arranged to be of a detachable structure, so that the pressed pyrophyllite blocks can be taken out more conveniently.

The working principle of the utility model is as follows: the upper pressing die 2, the lower pressing die 3 and the four side pressing dies 4 are respectively connected to six oil cylinders at the upper, lower, left, right, front and rear. The upper pressing die 2 and the lower pressing die 3 can move up and down along with the oil cylinders, the four side pressing dies 4 respectively and horizontally and automatically move along with the oil cylinders around, and the distances of the four side pressing dies 4 into the middle die 1 are the same. The size of a square die cavity of the middle die 1 and the length of the side pressure die 4, which are matched with the front-back left-right size of the profile pyrophyllite block, are designed, and the length of the upper die 2 and the lower die, which are matched with the upper-lower size of the profile pyrophyllite block, are designed. Since the shapes of the die heads of the upper die 2, the lower die 3 and the four side dies 4 are matched with the six-face shape of the pyrophyllite block to be pressed, the needed special-shaped pyrophyllite block can be pressed at one time. Because the special-shaped pyrophyllite block is pressed in one die cavity at one time, the pressed special-shaped pyrophyllite block has the characteristic of uniform density, reduces labor intensity and improves pressing efficiency.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. The high-density pyrophyllite block forming die comprises a middle die (1), wherein a die cavity is arranged in the middle die (1), and the high-density pyrophyllite block forming die is characterized by further comprising six pressing dies capable of pressing the die cavity up, down, left, right, front, back, six pressing dies and pressing the cubic pyrophyllite block with a prefabricated sealing edge in the die cavity in a mode of pressing in six directions.

2. The high-density pyrophyllite block molding die according to claim 1, wherein six pressing dies are respectively an upper pressing die (2), a lower pressing die (3) and four side pressing dies (4) at front, back, left and right; square guide holes which are vertically led into a square die cavity are formed in the upper end face, the lower end face and the four side faces of the middle die (1), the upper die (2) and the lower die (3) are respectively arranged in the square guide holes of the upper end face and the lower end face of the middle die (1), and the four side dies (4) are respectively arranged in the square guide holes of the four side faces of the middle die (1); the die head shapes of the upper pressing die (2), the lower pressing die (3) and the four side pressing dies (4) are matched with six-face shapes of pyrophyllite blocks to be pressed, a cylindrical structure is arranged in the middle of the die head of the upper pressing die (2), a cylindrical through hole penetrating the lower pressing die (3) vertically is formed in the lower pressing die (3), and the cylindrical structure of the upper pressing die (2) and the cylindrical through hole of the lower pressing die (3) share the central axis and have the same diameter.

3. The high-density pyrophyllite block forming die according to claim 2, wherein the upper pressing die (2), the lower pressing die (3) and the side pressing dies (4) are of T-shaped structures, the high-density pyrophyllite block forming die comprises a pressing head block portion (5) and a die head block portion (6), the width of the die head block portion (6) is smaller than that of the pressing head block portion (5), the die head block portion (6) is inserted into a square guide hole, and the pressing head block portion (5) is located on the outer side of the middle die (1).

4. A highly dense pyrophyllite block molding die according to claim 3, wherein the left and right sides of the die block portion (6) of the side compression die (4) are provided with chamfer or rounded corner structures to prevent collision of the die block portion (6) of the peripheral side compression die (4) during compression.

5. A highly dense pyrophyllite block molding die according to claim 3, wherein a first boss (601) is arranged in the middle of the end face of the die head block part (6) far away from the pressure head block part (5), and a second boss (602) is arranged in the middle of the first boss (601).

6. The high-density pyrophyllite block molding die according to claim 5, wherein the first boss (601) and the second boss (602) are in any one of square frustum shape and conical frustum shape, and the second boss (602) is smaller in size than the first boss (601).

7. The high-density pyrophyllite block forming die according to any one of claims 1-6, wherein chamfer structures are arranged on four sides of the middle die (1), the middle die (1) consists of an upper middle die (101) and a lower middle die (102), the upper middle die (101) and the lower middle die (102) are symmetrically arranged, and positioning columns and positioning holes are respectively arranged on the joint surfaces of the upper middle die (101) and the lower middle die (102); four threaded holes are uniformly formed in the upper end face of the lower middle die (102) along the circumferential direction of the upper end face, two-stage step connection through holes (103) which are in one-to-one correspondence with the four threaded holes of the lower middle die (102) are formed in the upper middle die (101), the upper middle die (101) and the lower middle die (102) are connected through hexagon socket head bolts, and the hexagon socket head bolts are installed in the two-stage step connection through holes (103) of the upper middle die (101) and the threaded holes of the lower middle die (102).