Pressed blank production equipment and method for special ceramic isostatic pressing

Abstract

According to the pressed blank production equipment and method for special ceramic isostatic pressing, the equipment is based on a portal frame, a height-adjustable locking cylinder body is arranged, an ascending flanged base and an elastic soft film cylinder body are installed on the locking cylinder body, an ejection device is arranged in the locking cylinder body, and an upper cover plate of the elastic soft film cylinder body is communicated with an elastic soft film through a rubber connecting pipe and used for exhausting; the production method comprises the steps that firstly, charging and mounting of the elastic soft film are completed through the ejection device, then the portal frame and the locking cylinder body are matched to fix the elastic soft film cylinder body, a liquid medium is introduced for pressurization, the connecting pipe synchronously exhausts air, and finally the elastic soft film is taken out. The exhaust efficiency is improved, the heavy physical labor is reduced, and the production efficiency and the product quality are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of green compact production equipment and method for special ceramic isostatic pressing. BACKGROUND

[0002] Isostatic pressing technology is a kind of process in the electric porcelain production industry, ceramic powder is pressed into ceramic by high pressure, this method is less used in ceramic production industry.The prior art has many problems when carrying out this process, such as:

[0003] The traditional operation process is to hoist the metal-shaped mold onto the vibration table, inject powder into the mold, cover the mold cap, tighten it, adjust the cleaning barrel to clean the outside of the mold, adjust the whole mold into the cylinder, pressurize, find the submerged lifting rope in the cylinder and then hang the lifting hook, use the crane to adjust the metal-shaped mold out of the cylinder, and the pressurizing medium attached to the surface of the mold is scattered everywhere during the process, which not only wastes the pressurizing medium but also causes the ground to be slippery, which is prone to safety accidents, in addition, the whole process is complex and requires multiple people to cooperate, which wastes manpower and is inefficient.

[0004] Therefore, how to solve the inconvenience of installation and disassembly during the installation of the elastic soft film is a problem to be solved. SUMMARY

[0005] The special ceramic isopressing equipment comprises a portal frame, a pressing cylinder and a forming die, the inner side of the portal frame is provided with the pressing cylinder, the inner side of the pressing cylinder is provided with the forming die, characterized in that the inner bottom of the portal frame is provided with a locking cylinder, the inside of the pressing cylinder is vertically and perpendicularly provided with a metal-shaped die, the outer side of the locking cylinder is externally provided with a support, the top center of the locking cylinder is vertically and perpendicularly provided with an ejection cylinder, the outer side of the ejection cylinder is provided with a lifting seat, the bottom of the lifting seat is vertically and perpendicularly arranged on the top surface of the support, the top surface of the lifting seat is fixedly connected with the bottom surface of the pressing cylinder, the top center of the lifting seat is provided with the ejection cylinder in a penetrating mode, the top surface of the piston rod of the ejection cylinder is connected with the bottom surface of the metal-shaped die in a clamping mode, the metal-shaped die is arranged in the inside of the pressing cylinder in a moving mode up and down by the piston rod, the forming die comprises an elastic soft film, the metal-shaped die, a cap, an exhaust joint, a high-pressure-resistant exhaust hose, a hose connecting nut and a positioning sleeve, the inner side of the metal-shaped die is provided with the elastic soft film, the top of the metal-shaped die is provided with the cap, the bottom center of the metal-shaped die is provided with the positioning sleeve, the top center of the cap is provided with the exhaust joint in a penetrating mode, the exhaust joint is connected with the hose connecting nut through the high-pressure-resistant exhaust hose, the hose connecting nut is connected with the outside in a conductive mode through the pressing cylinder, the exhaust joint on the product die is connected with the upper cylinder cover through the high-pressure-resistant exhaust hose, so that the exhaust can be realized while the ultrahigh pressure sealing is realized, the gas in the powder can be exhausted outside the high-pressure cylinder through the exhaust device on the elastic soft film, the compression rate of the blank is larger, the blank is more compact, the strength is higher, the dipping or spraying glazing can be realized in the subsequent glazing process, the production efficiency is greatly improved, the production cost is reduced, the metal-shaped die can complete the cycle operation of powder filling, cap, cylinder cover moving down, pressurizing, cylinder cover moving up, cap removing, blank removing and powder filling again after being put into the pressing cylinder without being frequently hoisted out, the metal-shaped die can be operated outside the cylinder by using the ejection cylinder to eject the metal-shaped die as a whole to exceed the height of the cylinder cover, meanwhile, the mechanical hand can realize full automation, the labor intensity is greatly reduced, and the blank compression efficiency is improved.

[0006] The ejection cylinder is fixed on the lower cylinder cover of the pressing cylinder, the piston rod of the ejection cylinder penetrates through the lower cylinder cover, the inner side of the ejection cylinder is provided with a high-pressure dynamic seal, the high-pressure dynamic seal is composed of a Y-shaped ring and a triangular copper ring, the ejection cylinder is embedded in the lifting seat, the height of the ejection cylinder is lower than that of the lifting seat, the lifting seat transmits the up-and-down force of the ejection cylinder, the bottom of the metal-shaped die is connected in a clamping mode when the piston rod of the ejection cylinder is retracted to the shortest position, the end of the piston rod is provided with a guide taper, the height of the ejection cylinder is adapted to the interval height between the metal-shaped die and the pressing cylinder, and the stroke of the ejection cylinder is greater than the stroke between the top surface of the metal-shaped die and the upper surface of the pressing cylinder.

[0007] The elastic soft film is embedded in the metal-shaped die in an integral mode, the top of the elastic soft film is provided with an open structure, and the edge of the open structure is provided with a flange structure.

[0008] The inner side of the metal forming die is provided with an elastic soft film, and the periphery surface of the metal forming die and the ground are both provided with pressurized water inlet holes.

[0009] The cap comprises a polyurethane cap and an iron cap, the polyurethane cap is nested outside the iron cap, the polyurethane cap and the elastic soft film are in interference fit, and a high-pressure seal is formed between the polyurethane cap and the iron cap.

[0010] An exhaust hole is formed in the middle of the exhaust joint, the exhaust joint is connected with the high-pressure sealed necklace of the cap through a nut, and an outer thread is arranged at the upper end of the high-pressure seal and connected with a high-pressure resistant exhaust hose.

[0011] The high-pressure resistant exhaust hose is a flexible pipe, and a plurality of hard pipes are arranged in the high-pressure resistant exhaust hose in a butt joint mode.

[0012] A positioning sleeve is arranged on the bottom surface of the metal forming die in a protruding mode, and the metal forming die is centered with the middle part of the compression cylinder through the positioning sleeve.

[0013] Compared with the prior art, the beneficial effects of the present application are as follows: the exhaust joint on the product die is connected with the upper cylinder cover through the high-pressure resistant exhaust hose, so that the exhaust can be realized while realizing the ultra-high pressure sealing, the gas in the powder is discharged outside the high-pressure cylinder through the exhaust device on the elastic soft film, the compression rate of the blank is larger, the blank is more compact, the strength is higher, the dipping or spraying glazing can be realized in the subsequent glazing process, the production efficiency is greatly improved, and the production cost is reduced.

[0014] The metal forming die can complete the cycle operation of powder filling, cap covering, cylinder cover descending, pressure adding, cylinder cover ascending, cap removing, blank removing and powder filling again without being frequently lifted out after being put into the compression cylinder, only the metal forming die is integrally lifted out to exceed the height of the cylinder cover by using the ejection cylinder, so that the operation can be realized outside the cylinder, and the mechanical hand is matched, so that the full automation can be realized, the labor intensity is greatly reduced, and the blank compression efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a sectional structure schematic view of a blank compression production equipment for special ceramic isostatic pressing;

[0016] Figure 2 It is an internal sectional view of an ultra-high pressure forming die of a blank compression production equipment for special ceramic isostatic pressing;

[0017] Figure 3 It is a local perspective schematic view of A;

[0018] Figure 4 It is a local perspective schematic view of B;

[0019] In the figure: 1, cylinder, 2, portal, 3, powder, 4, lifting seat, 5, ejector cylinder, 6, locking cylinder, 7, support, 8, walking system, 9, exhaust joint, 10, high-pressure exhaust hose, 11, hose connection nut, 12, cap, 13, elastic soft film, 14, metal shape mold, 15, positioning sleeve, 16, piston rod, 17, triangular copper ring, 18, Y ring. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present application, the present application will be further described below in conjunction with examples and drawings, which are only used to explain the present application and do not constitute a limitation on the protection scope of the present application.

[0021] Cylinder 1, portal 2, powder 3, lifting seat 4, ejector cylinder 5, locking cylinder 6, support 7, walking system 8, exhaust joint 9, high-pressure exhaust hose 10, hose connection nut 11, cap 12, elastic soft film 13, metal shape mold 14, positioning sleeve 15, piston rod 16, triangular copper ring 17, Y ring 18.

[0022] As Figure 1 , 2 , 3, 4 are shown;

[0023] The application relates to a green compact production device for special ceramic isostatic pressing, which comprises a portal frame 2, a pressing cylinder 1 and a forming die, the inner side of the portal frame 2 is provided with the pressing cylinder 1, the inner side of the pressing cylinder 1 is provided with the forming die, characterized in that the inner bottom of the portal frame 2 is provided with a locking cylinder 6, the vertical inner side of the pressing cylinder 1 is provided with a metal forming die 14, the outer side of the locking cylinder 6 is provided with a support 7, the top center of the locking cylinder 6 is vertically provided with an ejection cylinder 5, the outer side of the ejection cylinder 5 is provided with a lifting seat 4, the bottom of the lifting seat 4 is vertically provided on the top surface of the support 7, the top surface of the lifting seat 4 is fixedly connected with the bottom surface of the pressing cylinder 1, the top center of the lifting seat 4 is provided with the ejection cylinder 5 in a penetrating mode, the top surface of the piston rod 16 of the ejection cylinder 5 is connected with the bottom surface of the metal forming die 14 in a clamping mode, the metal forming die 14 is movably arranged in the pressing cylinder 1 through the piston rod 16, the forming die comprises an elastic soft film 13, the metal forming die 14, a cap 12, an exhaust joint 9, a high-pressure-resistant exhaust hose 10, a hose connecting nut 11 and a positioning sleeve 15, the inner side of the metal forming die 14 is provided with the elastic soft film 13, the top of the metal forming die 14 is provided with the cap 12, the bottom center of the metal forming die 14 is provided with the positioning sleeve 15, the top center of the cap 12 is provided with the exhaust joint 9 in a penetrating mode, the exhaust joint 9 is connected with the hose connecting nut 11 through the high-pressure-resistant exhaust hose 10, the hose connecting nut 11 is connected with the outside through the pressing cylinder 1, the ejection cylinder 5 is fixed on the lower cylinder cover of the pressing cylinder 1, the piston rod 16 of the ejection cylinder 5 penetrates through the lower cylinder cover, the inner side of the ejection cylinder 5 is provided with a high-pressure dynamic seal, the high-pressure dynamic seal is composed of a Y-shaped ring 18 and a triangular copper ring 17, the ejection cylinder 5 is embedded in the lifting seat 4, the height of the ejection cylinder 5 is lower than that of the lifting seat 4, the lifting seat 4 transmits the up-and-down force of the ejection cylinder 5, the bottom of the metal forming die 14 is connected in a clamping mode when the piston rod 16 of the ejection cylinder 5 is retracted to the shortest position, the end of the piston rod 16 is provided with a guide taper, the height of the ejection cylinder 5 is matched with the interval height between the metal forming die 14 and the pressing cylinder 1, the stroke of the ejection cylinder 5 is greater than the stroke between the top surface of the metal forming die 14 and the upper surface of the pressing cylinder 1, the elastic soft film 13 is embedded in the metal forming die 14 in an integral mode, the top of the elastic soft film 13 is provided with an open structure, the edge of the open structure is provided with a flange structure, the inner side of the metal forming die 14 is provided with the elastic soft film 13 in a support outward expansion mode, the four peripheral surfaces of the metal forming die 14 and the ground are provided with pressurized water inlets, the cap 12 comprises a polyurethane cap and an iron cap, the polyurethane cap is embedded on the outer side of the iron cap, the polyurethane cap and the elastic soft film 13 are in interference fit, high-pressure sealing is formed between the polyurethane cap and the iron cap, the exhaust joint 9 is provided with an exhaust hole in the middle, the exhaust joint 9 is connected with the cap 12 in a high-pressure sealing mode through a nut, the outer thread of the high-pressure sealing upper end is connected with the high-pressure-resistant exhaust hose 10, the high-pressure-resistant exhaust hose 10 is a flexible pipe, a plurality of hard pipes are arranged in the high-pressure-resistant exhaust hose 10 in a butt joint mode,The bottom center of the metal mold 14 is provided with a positioning sleeve 15, and the metal mold 14 is centered with the middle part of the pressing cylinder 1 through the positioning sleeve 15.

[0024] Embodiment example

[0025] a. The lifting seat 4 is seated on the support 7, the pressing cylinder 1 is installed above the lifting seat 4, the locking cylinder 6 is installed on the gantry 2, there is a small gap between the locking cylinder 6 and the lifting seat 4, the ejection cylinder 5 is installed on the lower cylinder cover of the pressing cylinder 1 and is nested in the middle of the lifting seat 4.

[0026] b. The metal mold 14 is hoisted into the pressing cylinder 1 as a whole, is inserted into the piston rod 16 under the guidance of the taper at the end of the piston rod 16 of the ejection cylinder 5, until the whole metal mold 14 falls onto the lower cylinder cover of the pressing cylinder 1, the piston rod 16 of the ejection cylinder 5 is extended to drive the metal mold 14 to rise above the upper cylinder cover of the high-pressure cylinder 1.

[0027] c. The powder 3 is added into the elastic soft film 131, the cap 123 is covered to make it in interference fit with the product mold, the whole is hoisted into the pressing cylinder 1, the connecting nut at one end of the high-pressure exhaust hose 10 is tightly fixed with the cylinder cover, the cylinder cover is also provided with an exhaust hole and a threaded joint.

[0028] d. After the powder is filled and the cap 12 is covered, the ejection cylinder 5 is retracted to drive the metal mold 14 to fall onto the lower cylinder cover of the pressing cylinder 1, the upper cylinder cover of the pressing cylinder 1 is moved down to the position, the gantry 2 is walked above the pressing cylinder 1 under the traction of the walking system 8, the locking cylinder 6 first locks the lifting seat 4 and the pressing cylinder 1 to transmit the force to the gantry 2, and the pressing program is started.

[0029] e. During the pressing, the emulsion in the cylinder extrudes the powder in the elastic soft film 13 through the water inlet hole of the metal mold 14, there is a gap between the powders, the gas in the compressed powder is discharged out of the cylinder along the inner hole of the hard tube, due to the discharge of the gas, the compression rate of the pressed blank is larger, the blank is more compact and has higher strength.

[0030] f. After the pressing program is completed, the gantry 2 is withdrawn from the position of the pressing cylinder 1 under the traction of the walking system 8, the upper cylinder cover of the pressing cylinder 1 is opened, the ejection cylinder 5 is extended to drive the metal mold 14 to rise above the upper cylinder cover of the high-pressure cylinder 1, the cap is removed, the blank is hoisted out, and then the powder is filled to circulate.

[0031] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A pressed embryo production equipment for isostatic pressing of special ceramics, comprising a gantry, a pressing cylinder and a forming die, wherein the gantry is provided with a pressing cylinder on the inner side thereof, and the forming die is provided on the inner side thereof, wherein: The bottom of the inner side of the gantry is provided with a locking cylinder, the inside of the pressure cylinder is vertically provided with a metal mold, the outside of the locking cylinder is outwardly provided with a bracket, and the top center of the locking cylinder is vertically provided with an ejection cylinder, and the outside of the ejection cylinder is provided with a lifting seat, the bottom of the lifting seat is vertically arranged on the top surface of the bracket, the top surface of the lifting seat is fixedly connected to the bottom surface of the pressure cylinder, and the top center of the lifting seat is provided with an ejection cylinder, the top surface of the piston rod of the ejection cylinder is clamped and connected to the bottom surface of the metal mold, and the metal mold is arranged in the inside of the pressure cylinder by moving up and down through the piston rod. The forming mold includes an elastic soft film, a metal mold, a cap, an exhaust joint, a high-pressure exhaust hose, a hose connecting nut and a positioning sleeve. The inner side of the metal mold is provided with an elastic soft film, the top of the metal mold is provided with a cap, and the bottom center of the metal mold is provided with a positioning sleeve. The top center of the cap is provided with an exhaust joint, and the exhaust joint is connected to the hose connecting nut through a high-pressure exhaust hose, and the hose connecting nut is connected to the outside through the pressure cylinder.

2. The equipment for producing isostatically pressed special ceramic embryos according to claim 1, characterized in that: The ejection cylinder is fixed on the lower cylinder cover of the pressure cylinder, and the piston rod of the ejection cylinder passes through the lower cylinder cover. A high-pressure dynamic seal is provided on the inner side of the ejection cylinder. The high-pressure dynamic seal is composed of a Y-ring and a triangular copper ring. The ejection cylinder is embedded in the lifting seat. The height of the ejection cylinder is lower than the lifting seat. The lifting seat transmits the up and down force of the ejection cylinder. When the piston rod of the ejection cylinder is retracted to the shortest point, it is connected to the bottom of the metal mold by clamping. The end of the piston rod is provided with a guide taper. The height of the ejection cylinder is adapted to the height of the spacing between the metal mold and the pressure cylinder. The stroke of the ejection cylinder is greater than the stroke between the top surface of the metal mold and the upper plane of the pressure cylinder.

3. The equipment for producing isostatically pressed special ceramic embryos according to claim 1, characterized in that: The elastic soft film is nested in the metal mold in an integral form. An open structure is provided on the top of the elastic soft film, and a flange structure is provided on the edge of the open structure.

4. The equipment for producing isostatically pressed special ceramic embryos according to claim 1, characterized in that: The inner side support of the metal mold is expanded outward and provided with an elastic soft membrane, and pressurized water inlet holes are distributed on the surrounding surface and the ground of the metal mold.

5. The equipment for producing isostatically pressed special ceramic embryos according to claim 1, characterized in that: The cap comprises a polyurethane cap and an iron cap, wherein the polyurethane cap is nested outside the iron cap, the polyurethane cap and the elastic soft film are interference fit, and a high-pressure seal is formed between the polyurethane cap and the iron cap.

6. The equipment for producing isostatically pressed special ceramic embryos according to claim 1, characterized in that: An exhaust hole is opened in the middle of the exhaust joint, and the exhaust joint is a high-pressure sealed necklace through a nut and a cap. The upper end of the high-pressure seal is provided with an external thread connected to a high-pressure resistant exhaust hose.

7. The equipment for producing isostatically pressed special ceramics according to claim 1, characterized in that: The high-pressure exhaust hose is a flexible tube, and the interior of the high-pressure exhaust hose is butt-jointed with a plurality of sections of hard tubes.

8. The equipment for producing isostatically pressed special ceramic embryos according to claim 1, characterized in that: A positioning sleeve is provided in a protruding manner at the center of the bottom surface of the metal mold, and the metal mold is centered with the middle of the pressure cylinder through the positioning sleeve.

9. The method for producing a pressed embryo for isostatic pressing of special ceramics according to claim 1, which is used to implement the equipment for producing a pressed embryo for isostatic pressing of special ceramics according to claims 1 to 8, characterized in that: The following steps are involved: a. The lifting seat sits on the bracket, a pressure cylinder is installed above the lifting seat, a locking cylinder is installed on the gantry, there is a small gap between the locking cylinder and the lifting seat, and the ejection cylinder is installed on the lower cylinder cover of the pressure cylinder and nested in the middle of the lifting seat. b. The metal mold is hoisted into the pressure cylinder as a whole and inserted into the piston rod under the guidance of the taper of the piston rod end of the ejection cylinder until the entire metal mold falls on the lower cylinder cover of the pressure cylinder. The ejection cylinder piston rod extends to drive the metal mold to rise to the upper cylinder cover of the ultra-high pressure cylinder. c. Add powder into the elastic soft film 1, cover it with the cap 3 so that it has an interference fit with the product mold, and hoist the whole into the pressure cylinder. Tighten and fix the connecting nut at one end of the high-pressure exhaust hose to the cylinder cover. The cylinder cover also has an exhaust hole and a threaded joint installed. d. After the powder is filled and the cap is closed, the ejector cylinder retracts and drives the metal mold to fall onto the lower cylinder cover of the pressure cylinder. The upper cylinder cover of the pressure cylinder moves down into place. The gantry moves to the top of the pressure cylinder under the traction of the walking system. The locking cylinder first locks the lifting seat and the pressure cylinder, transmits the force to the gantry, and starts the pressurization program. e. When pressurized, the emulsion in the cylinder passes through the water inlet hole of the metal mold to squeeze the powder in the elastic soft film. There are gaps between the powders. After compression, the gas in the powder is discharged out of the cylinder along the inner hole of the hard tube. Due to the discharge of gas, the compression rate of the pressed billet is greater, the billet is tighter and the strength is higher. f. After the pressurization procedure is completed, the gantry is pulled out by the walking system and staggered with the pressure cylinder. The upper cylinder cover of the pressure cylinder is opened, and the ejector cylinder extends to drive the metal mold to rise above the upper cylinder cover of the high-pressure cylinder. The cap is removed, the blank is lifted out, and then powder is filled and the cycle is carried out.

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