CN211806788U - Alumina ceramic integration hot briquetting machine - Google Patents

Abstract

The utility model discloses an alumina ceramic integrated hot-pressing forming machine, which comprises a pressing device and a hot-pressing device, wherein the pressing device and the hot-pressing device are fixed on a frame, the hot-pressing device is positioned below the pressing device, a stirring device is arranged inside the hot-pressing device, and a hot-pressing die is arranged above the hot-pressing device; the pressing device enables one path of high-pressure gas to act on the hot-pressing die, and the other path of high-pressure gas enters the hot-pressing device to enable the slurry to flow into the cavity of the hot-pressing die; the stirring device is used for stirring the slurry in the hot pressing device, so that the alumina ingredients are more uniformly distributed in the slurry; temperature measuring elements for detecting the temperature of the internal oil and the temperature of the slurry at the slurry outlet are respectively arranged in the hot-pressing device, and the power of the electric heating device is regulated and controlled in real time according to the temperature detected by the temperature measuring elements, so that the aim of accurately controlling the temperature is fulfilled. This openly through mould and heating device, make temperature field distribution tend to rationally, can accurate control thick liquids temperature, obviously improve heating efficiency, the distribution of aluminium oxide powder in liquid paraffin can show and promote foundry goods shaping quality.

Description

Alumina ceramic integration hot briquetting machine

Technical Field

The disclosure belongs to the technical field of alumina ceramic processing and forming, and particularly relates to an alumina ceramic integrated hot-pressing forming machine.

Background

In ceramic processing, the most commonIs an alumina material. The alumina ceramic is prepared from alumina (Al)₂O₃) Ceramic material as main body for thick film integrated circuit. The alumina ceramic has better conductivity, mechanical strength and high temperature resistance. It should be noted that washing with ultrasonic waves is required. Alumina ceramic is a ceramic with wide application, and because of the superior performance, the alumina ceramic has been more and more widely applied in modern society, and meets the requirements of daily use and special performance.

The alumina ceramics are divided into a high-purity type and a common type. High purity alumina ceramic system Al₂O₃The ceramic material with the content of more than 99.9 percent is generally made into molten glass to replace a platinum crucible as the sintering temperature is up to 1650-; the light transmission property and the alkali-resistant metal corrosivity of the fluorescent lamp are utilized as sodium lamps; can be used as an integrated circuit substrate and a high-frequency insulating material in the electronic industry. Common alumina ceramic system Al₂O₃The content of the Al is divided into 99 porcelain, 95 porcelain, 90 porcelain, 85 porcelain and other varieties, and Al is sometimes used₂O₃The ceramic with the content of 80% or 75% is also classified as a common alumina ceramic series. Wherein the 99 alumina porcelain material is used for manufacturing high-temperature crucibles, fire-resistant furnace tubes and special wear-resistant materials, such as ceramic bearings, ceramic sealing elements, water valve plates and the like; the 95 alumina porcelain is mainly used as a corrosion-resistant and wear-resistant part; 85, the porcelain is often mixed with partial talc, so that the electrical property and the mechanical strength are improved, and the porcelain can be sealed with metals such as molybdenum, niobium, tantalum and the like, and some porcelain can be used as an electric vacuum device.

The forming method of the alumina ceramic product comprises various methods such as dry pressing, grouting, extrusion, cold isostatic pressing, injection, tape casting, hot pressing, hot isostatic pressing and the like. In recent years, forming technical methods such as filter pressing, direct solidification injection molding, gel injection molding, centrifugal injection molding, solid free molding and the like are developed at home and abroad. Different product shapes, sizes, complex shapes and precision products require different forming methods.

1. Dry pressing and forming: the dry pressing technology of alumina ceramic is limited to the object with simple shape, the thickness of the inner wall of more than 1mm and the ratio of the length to the diameter of not more than 4: 1. The molding method has a uniaxial direction or a bidirectional direction. The press has two types of hydraulic and mechanical types, and can be in a semi-automatic or full-automatic forming mode. The maximum pressure of the press is 200 MPa. The output can reach 15-50 pieces per minute. Because the stroke pressure of the hydraulic press is uniform, the heights of the pressed parts are different when the powder filling is different. The pressure applied by the mechanical press changes according to the filling amount of the powder, so that the size shrinkage after sintering is easy to generate difference, and the product quality is influenced. Therefore, uniform distribution of powder particles during dry pressing is very important for mold filling. The accurate filling quantity has great influence on the control of the dimensional precision of the manufactured alumina ceramic parts. The powder particles with the particle size of more than 60 mu m and between 60 and 200 meshes can obtain the maximum free flow effect and the best pressure forming effect.

2. And (3) grouting forming method: slip casting is the earliest method of forming alumina ceramics. The plaster mold is adopted, so that the cost is low, and the large-size and complex-shape part is easy to mold. The key of slip casting is the preparation of alumina slurry. Water is usually used as a flux medium, a debonder and a binder are added, air is exhausted after the debonder and the binder are fully ground, and then the mixture is poured into a gypsum mold. The slurry is then cured in the mold due to the adsorption of moisture by the gypsum mold capillaries. During hollow grouting, when the thickness of the slurry adsorbed on the mold wall reaches the required thickness, the excess slurry needs to be poured out. In order to reduce the shrinkage of the green body, high-concentration slurry should be used as much as possible.

3. Hot-press molding: hot-press casting is a wide-range production process for producing special ceramics, and its basic principle is that by utilizing the characteristics of that paraffin wax is heated to melt and solidified when meeting condensation, the non-plastic barren ceramic powder material and hot paraffin wax liquid are uniformly mixed to form flowable slurry, and then the slurry is injected into metal mould under a certain pressure to make formation, and after the paraffin wax is solidified, the mould is removed, and the formed blank body is taken out. The blank is properly trimmed, embedded into an adsorbent, heated for dewaxing treatment, and then dewaxed and sintered into a final product.

The inventor finds that the traditional hot-press forming equipment which is most widely applied cannot adapt to special forming requirements, because an oil bath box heating device is unreasonable in design, internal oil is unevenly heated, the heat preservation effect on slurry is not ideal, in addition, the machine usually needs a large amount of preparation time in advance when being started, alumina powder in the slurry is unevenly distributed in liquid paraffin, the blank after dewaxing is often caused to generate defects, and because the temperature of the slurry is not easy to control, the defects of the mold and a slurry outlet caused by temperature change are caused.

Application number "CN 201620655548.4" discloses a pottery hot die-casting make-up machine, it includes the hot die-casting machine body, a workbench, mould and fixed stay frame, install the workstation on the hot die-casting machine body, be equipped with the mould on the workstation, be equipped with the foundry goods in the mould, just be equipped with fixed stay frame in the both sides of mould on the workstation, install closing device on the fixed stay frame, closing device's both ends are connected with first air compression siphunculus, this internal storage container that is equipped with of hot die-casting machine, be equipped with the feed pipe in the storage container, be equipped with the oil bath constant temperature groove between hot die-casting machine body and the storage container, be equipped with U type heating pipe in the oil bath constant temperature groove, one side of hot die-casting. The utility model discloses use U type heating pipe for the thick liquid in the storage container can be heated evenly, and set up closing device, reduce the gas pocket that produces among the ceramic forming process, strengthened porcelainous aesthetic property, improved ceramic structure's stability, practiced thrift the material, improved the utilization ratio of resource.

The shortcoming of this device is, lacks temperature control device, can not accurate control forming temperature, and thick liquids concentration can change, and the foundry goods produces the defect easily, and heating device temperature field distribution is inhomogeneous, and the intensification is slow, and preparation time is long, and the energy consumption is too high, does not accord with the theory of green processing.

Application number "CN 201610056298.7" discloses a hot-press casting forming process integration equipment. The device comprises a stirring and material preparing system, a die-casting system and a shell. The stirring and material preparing system comprises a stirring tank, a stirrer and a lifter, wherein a filling body of the stirring tank is arranged into an inner layer and an outer layer, a cavity is formed between the two layers of filling bodies, heat-conducting silicon oil is filled in the cavity, a heater and a temperature sensor are arranged, and a discharge port is also arranged at the bottom of the stirring tank; the die-casting system comprises a material liquid pipeline, a discharge hole, a support and a pressing device, the material liquid pipeline is arranged between the discharge hole and the discharge hole, the discharge hole is formed in the upper surface of the casing, the discharge hole is further formed in the central axis of the support, the support is arranged on the upper surface of the casing, and the pressing device is arranged in the center of the cross beam of the support and corresponds to the discharge hole. The utility model discloses an this equipment, through the oil bath heating of agitator tank and the heat band on the feed liquid pipeline, guaranteed that the temperature of feed liquid is even, and this equipment's degree of automation is higher relatively.

Although this device can accurate control thick liquids temperature, nevertheless can't be according to various forming die, accurate regulation and control thick liquids temperature, agitating unit can't effectively stir the thick liquids of deposit bottom, influences foundry goods shaping quality.

Application number "CN 201711076088.5" discloses a hot briquetting machine, including handle, motor case, last mould, bed die, support, pneumatic cylinder, base, pipeline and switch box, the switch box is installed in motor case left side, the bed die is installed on the motor case, the support mounting is on the motor case, it installs on the support to go up the mould, the pneumatic cylinder is installed on the support, pipe connection motor case and pneumatic cylinder, the pedestal mounting is in motor case below. The utility model has the advantages that: the utility model relates to a rationally, simple structure. The insulating rubber layer is arranged on the handle, so that the electric shock probability is greatly reduced, and the safety is improved.

Although the device solves the safety problem, the device does not improve the temperature which is a key factor influencing hot-press forming, and cannot adapt to various forming dies, and the temperature field distribution of the heating device is unreasonable and is not in accordance with the concept of green processing.

By combining the factors, the current concept of green and low-carbon development is combined, and the hot-press casting forming process is fully known, but the structure development of related devices is not perfect, the temperature field distribution is unreasonable, the forming temperature cannot be accurately controlled, and the defects that the casting forming quality is not high easily caused by uneven distribution of aluminum oxide powder in liquid paraffin are generally existed.

SUMMERY OF THE UTILITY MODEL

The purpose of the present disclosure is to overcome the above technical deficiencies, and to provide an alumina ceramic integrated hot-press molding machine; the machine integrates the functions of accurate temperature control, stirring, leakage prevention, die casting and forming.

The invention aims to provide an alumina ceramic integrated hot-pressing forming machine, which adopts the following technical scheme for realizing the aim:

an integrated hot-pressing forming machine for alumina ceramics comprises a pressing device and a hot-pressing device which are fixed on a frame, wherein the hot-pressing device is positioned below the pressing device, a stirring device is arranged in the hot-pressing device, and a hot-pressing mold is arranged above the hot-pressing device;

the pressing device enables one path of high-pressure gas to act on the hot-pressing die, and the other path of high-pressure gas enters the hot-pressing device to enable the slurry to flow into the cavity of the hot-pressing die;

the stirring device is used for stirring the slurry in the hot pressing device, so that the alumina ingredients are more uniformly distributed in the slurry;

temperature measuring elements for detecting the temperature of the internal oil and the temperature of the slurry at the slurry outlet are respectively arranged in the hot-pressing device, and the power of the electric heating device is regulated and controlled in real time according to the temperature detected by the temperature measuring elements, so that the aim of accurately controlling the temperature is fulfilled.

According to a further technical scheme, the pressing device comprises threaded connecting rods on two sides of the lifting frame, a piston pressing rod and a return spring which are arranged in a pressing rod stroke cavity of the lifting frame, and a flange face end cover which is arranged on a boss on the lifting frame, the lifting frame is fixed on the threaded connecting rods, a high-pressure air pipe is connected with the flange face end cover, high-pressure air is divided into two parts through an air valve and flows out simultaneously, and one part of the high-pressure air pipe flows to the piston pressing rod stroke cavity on the lifting frame through the high-pressure air pipe to push the piston pressing.

According to the technical scheme, the core plate positioning cylinder is arranged on the core plate of the hot-pressing mold, the core base plate, the upper mold, the cavity and the lower mold are sequentially positioned and assembled through the core plate positioning cylinder, the lower mold and the slurry inlet plate, and fillet transition is arranged at the bottom of the lower mold and at the junction between the core clamping block and the inner part of the cavity of the mold, so that deformation of a casting caused by stress concentration can be obviously improved.

According to a further technical scheme, the hot-pressing device comprises an oil bath box and a flange embedded ring arranged on the upper portion of a supporting lug ring of the oil bath box, and a pulp barrel and a pulp outlet end cover are sequentially arranged on a boss on the inner side of the flange embedded ring;

oil is filled between the oil bath box and the slurry barrel, the temperature of the oil is accurately controlled through the electric heating device and the thermocouple which are arranged inside, a slurry injection pipe is arranged below the slurry outlet end cover inside the slurry barrel, an electric heating device and the thermocouple are arranged above the slurry injection pipe and close to the position where the slurry outlet is arranged, and the temperature of slurry at the slurry outlet is accurately controlled.

According to a further technical scheme, the stirring device comprises an impeller arranged at the bottom of the pulp barrel, a motor arranged on the rack and a transmission device; the alumina ingredients are more uniformly distributed in the slurry under the stirring action of the impeller.

According to the further technical scheme, the piston compression bar in the compressing device is right opposite to the center of the grout outlet, the height of the piston compression bar is adjusted through the interaction of the positioning nut and the tightening nut on the threaded connecting rod, and the compressing device is suitable for moulds with different heights.

As a further solution, an electric heating device consisting of a plurality of U-shaped heating pipes and a temperature thermocouple are arranged in the oil bath box, and the working power of the electric heating device is timely regulated and controlled according to the reading fed back by the temperature thermocouple on the temperature control box.

As a further technical scheme, a thermocouple and a slurry outlet electric heating device are arranged on a grouting pipe inside the slurry barrel, and the working power of the slurry outlet electric heating device is timely regulated and controlled according to the reading fed back on the temperature box by the thermocouple on the grouting pipe.

As a further technical scheme, packing materials are filled between a transmission shaft of the stirring device and the slurry barrel, a gland of the stirring device is positioned at the bottom of the oil bath box, internal threads are arranged in the gland, the gland is in threaded connection with a raised head of the slurry barrel, the gland is in clearance fit with an oil outlet of the oil bath box, the gland rotates along the external threads of the raised head of the slurry barrel, a pressing sleeve compresses the packing, slurry leakage is avoided by means of the labyrinth effect of the packing materials, rubber sealing rings positioned on a base of the slurry barrel and a base of the oil bath box are simultaneously compressed by the gland, oil leakage is avoided, and meanwhile, the transmission efficiency of the transmission shaft is higher under the matching of a plurality of groups of bearings.

The working method of the alumina ceramic integrated hot-pressing forming machine comprises the following steps:

placing the assembled mould in a mould embedded sleeve positioned at the upper part of the grout outlet end cover;

stirring the slurry in the slurry barrel;

monitoring the temperature of the oil in the oil bath box according to the reading of a temperature thermocouple positioned in the oil bath box and displayed on a temperature control box, well regulating and controlling the heating power of an electric heating device in the oil bath box, monitoring the temperature of slurry at a slurry outlet in real time according to the reading of the thermocouple positioned on a slurry injection pipe, and timely regulating and controlling an electric heating device at the slurry outlet positioned on the slurry injection pipe;

then the air valve is opened, the high-pressure gas is divided into two parts, wherein one part of the high-pressure gas enters the stroke cavity of the piston pressure rod of the lifting frame to push the piston pressure rod to press the mould tightly, the other part of the high-pressure gas enters the inside of the slurry barrel through the air inlet hole on the end cover of the through hole, so that the slurry is injected into the mould cavity through the grouting pipe, the pressure rod presses the mould tightly in advance because the wave-fold from the air source to the slurry barrel is larger than that to the stroke cavity of the pressure rod;

after the mold cavity is filled with the slurry, the air valve is reset under the action of the internal reset spring, the air valve is closed, the piston pressure rod is reset under the action of the reset spring positioned in the piston pressure rod stroke cavity, and the slurry barrel is decompressed;

taking out the mold, cutting the grouting opening, opening the mold and discharging the embryo.

The beneficial effect of this disclosure does:

(1) according to the compressing device, the height of the piston compression bar in the lifting frame can be regulated and controlled by rotating the positioning nut on the threaded connecting rod and screwing the nut, the compressing device is suitable for dies with different heights, lubricating oil is filled in a stroke cavity of the piston compression bar, friction is reduced, and the air tightness is higher;

(2) according to the hot-pressing die, the defects caused by stress concentration in the blank are avoided by designing a plurality of internal round corners for transition, the blank produced by the die has a smaller processing allowance, and the green production requirement is met;

(3) according to the hot pressing device, the electric heating device in the oil bath box is redesigned, and the temperature field distribution in the oil bath box is improved by adopting a mode that a plurality of groups of U-shaped electric heating tubes are uniformly distributed and connected in parallel;

(4) according to the hot-pressing device, the plurality of groups of U-shaped heating pipes are connected in parallel, so that the fault rate is lower, and the temperature field distribution of the oil bath box cannot be obviously influenced when any one group of heating pipes fails;

(5) the temperature thermocouple is arranged in the oil bath box of the hot-pressing device, so that the temperature of the internal oil can be observed in real time, and the power of the electric heating device is regulated and controlled in real time through the temperature control box, so that the aim of accurately controlling the temperature is fulfilled;

(6) the thermocouple is arranged on the grouting pipe of the hot-pressing device, so that the temperature of the slurry at the slurry outlet can be read in real time, the working power of the electrothermal device at the slurry outlet can be regulated and controlled in real time according to the requirement of a die-casting process, and the aim of accurately controlling the temperature of the slurry at the slurry outlet is fulfilled;

(7) the stirring device disclosed can avoid the problem that the alumina ingredient inside the pulp barrel is not uniformly distributed, thereby being capable of obviously improving the quality of the blank after dewaxing treatment.

(8) This disclosed agitating unit is equipped with many rings of packing between its transmission shaft and thick liquid bucket under the gland is rotatory along thick liquid bucket plush copper external screw thread, and the packing is compressed tightly to the pressure cover, relies on the labyrinth effect of packing material, avoids the thick liquids to leak, and the gland compresses tightly the rubber seal who is located thick liquid bucket base and oil bath base simultaneously, has avoided the leakage of fluid, and transmission efficiency is higher under the cooperation of multiunit bearing of transmission shaft simultaneously.

(9) This openly through mould and heating device, make temperature field distribution tend to rationally, can accurate control thick liquids temperature, obviously improve heating efficiency, the distribution of aluminium oxide powder in liquid paraffin can show and promote foundry goods shaping quality.

(10) The system utilizes the temperature thermocouple arranged in the oil bath box to monitor the temperature of oil liquid in the oil bath box in real time, regulates and controls the working power of the electric heating device in due time according to needs, utilizes the thermocouple arranged in the grouting pipe to monitor the temperature of slurry at a slurry outlet in real time, and regulates and controls the working power of the electrothermal device at the slurry outlet in due time according to the physical properties of the slurry, thereby realizing the function of accurate temperature control; the motor arranged on the frame is used for driving the impeller arranged at the bottom of the slurry box to rotate through belt wheel transmission, so that the stirring function of the slurry box is realized; by utilizing the mutual matching of the packing, the pressing sleeve and the pressing cover sealing ring which are arranged at the bottom of the oil bath box, the leakage of oil and slurry can be prevented, and the leakage prevention function of the oil bath box is realized; the air valve is opened by stepping on the pedal, the pressing rod is pressed down under the action of high-pressure gas to compress the die, and meanwhile, the slurry barrel is pressurized, and slurry is pressed into the die from the grouting pipe, so that the functions of die casting and forming are realized.

Drawings

FIG. 1 is an assembled view of the hot press axle side;

FIG. 2 is an axial assembly view of the hold-down device; FIG. 2(a) is an enlarged view of a portion of the section A in FIG. 2; FIG. 2(B) is a sectional view of the connection part of the section B lifting frame and the threaded support rod in FIG. 2;

FIG. 3 is an exploded view of the hold down device;

FIG. 4 is a partial cross-sectional view of the compression device; FIG. 4(a) is an enlarged view of a portion of the section A in FIG. 4;

FIG. 5 is an isometric view of a threaded connection; FIG. 5(a) is a right side view of the threaded connecting rod; FIG. 5(b) is a front view of a threaded connecting rod;

FIG. 6 is an isometric view of the elevator frame; FIG. 6(a) is a top view of the crane; FIG. 6(b) is a sectional view taken along line A-A in FIG. 6 (a); FIG. 6(c) is a partially enlarged view of a section B in FIG. 6 (B);

FIG. 7 is an isometric view of a flange face end cap; FIG. 7(a) is a flange face end cap elevation view; FIG. 7(b) is a top view of a flange face end cap; FIG. 7(c) is a sectional view taken along line B-B in FIG. 7 (B); FIG. 7(d) is an enlarged partial view of section C in FIG. 7 (C);

FIG. 8 is a side view of the piston rod; FIG. 8(a) is a front view of the piston rod; FIG. 8(b) is a right side view of the plunger rod;

FIG. 9 is an isometric view of the clamp nut; FIG. 9(a) is an exploded view of the clamping nut; FIG. 9(b) is a top view of the clamping nut; FIG. 9(c) is a sectional view taken along line A-A in FIG. 9 (b);

FIG. 10 is an isometric view of the positioning nut; FIG. 10(a) is a top view of the positioning nut; FIG. 10(B) a sectional view taken along line B-B of FIG. 10 (a);

FIG. 11 is an isometric view of a hot die;

FIG. 12 is an exploded view of a hot press mold;

FIG. 13 is a top view of the hot press mold; FIG. 13(a) is a sectional view taken along line A-A in FIG. 13;

FIG. 14 is an isometric view of a core plate; FIG. 14(a) is an exploded view of a core plate; FIG. 14(b) is a core plate elevation view; FIG. 14(c) is a top view of the backing plate;

FIG. 15 is an isometric view of a core clamp block; FIG. 15(a) is a front view of a core clamp block; FIG. 15(b) is a left side view of the core clamp block; FIG. 15(c) is a top view of the core clamp block;

FIG. 16 is an isometric view of a core cylinder; FIG. 16(a) is a core post elevation view; FIG. 16(b) is a left side view of the core post; FIG. 16(c) is a top view of the core post;

FIG. 17 is an isometric view of the upper die; FIG. 17(a) is an exploded view of the upper die; FIG. 17(b) is a front view of the upper die; FIG. 17(c) is a top view of the upper platen; FIG. 17(d) is a partially enlarged view of the section B in FIG. 17 (e); FIG. 17(e) is a sectional view taken along line A-A in FIG. 17 (c);

FIG. 18 is an isometric view of the mold cavity; FIG. 18(a) is a top view of the mold cavity; FIG. 18(B) is a sectional view of the section B-B in FIG. 18 (a); FIG. 18(c) is an enlarged view of a portion of the rib shown in FIG. 18 (a); FIG. 18(d) is a sectional view taken along line A-A in FIG. 18 (a);

FIG. 19 is a lower die isometric view; FIG. 19(a) is an exploded view of the lower mold; FIG. 19(b) is a top view of the lower mold; FIG. 19(C) is a cross-sectional view taken along the line B-B and the line C-C in FIG. 19 (B); FIG. 19(d) is a sectional view taken along line A-A in FIG. 19 (b); FIG. 19(e) is a plan view of the upper backing plate of the lower mold; FIG. 19(f) is a top view of the lower die lower backing plate;

FIG. 20 is an isometric view of a paddle intake plate; FIG. 20(a) is a top view of a paddle intake plate; FIG. 20(b) is a sectional view taken along line A-A in FIG. 20 (a);

FIG. 21 is an isometric view of the autoclave apparatus; FIG. 21(a) is a plan view of the hot press apparatus; FIG. 21(b) is a sectional view taken along line A-A in FIG. 21 (a); FIG. 21(c) is a sectional view taken along line B-B in FIG. 21 (a);

FIG. 22 is an isometric view of FIG. 21 with the oil bath tub removed;

FIG. 23 is an isometric view of FIG. 21 with the bath box, electric heater and vat removed;

FIG. 24 is an isometric view of the table; FIG. 24(a) is a bottom view of the table; FIG. 24(b) is a sectional view taken along line A-A of FIG. 24 (a); FIG. 24(c) is a sectional view of B-B of FIG. 24 (a);

FIG. 25 is an isometric view of a flange insert ring; FIG. 25(a) is a bottom view of the flange insert ring; FIG. 25(b) is a cross-sectional view taken along line A-A of FIG. 25 (a); FIG. 25(c) is a sectional view of B-B of FIG. 25 (a);

FIG. 26 is an isometric view of the plate; FIG. 26(a) is a top view of the plate; FIG. 26(b) is a left side view of the plate;

FIG. 27 is an isometric view of a mold nest; FIG. 27(a) is a top view of a mold nest; FIG. 27(b) is a sectional view taken along line A-A of FIG. 27 (a);

FIG. 28 is an isometric view of the grout outlet end cap; FIG. 28(a) is a top view of a grout outlet end cap; FIG. 28(b) is a cross-sectional view taken along line A-A of FIG. 28 (a);

FIG. 29 is an isometric view of the oil bath; FIG. 29(a) is a top view of the oil bath tank; FIG. 29(b) is a sectional view taken along line A-A of FIG. 29 (a);

FIG. 30 is an isometric view of a hand hole end cap; FIG. 30(a) is a top view of the hand hole end cap; FIG. 30(b) is a sectional view taken along line A-A in FIG. 30 (a);

FIG. 31 is an isometric view of the electric heating apparatus; FIG. 31(a) is a top view of the electric heating apparatus;

FIG. 32 is an isometric view of the pulp barrel; FIG. 32(a) is a cross-sectional view of FIG. 32(b) (C-C); FIG. 32(b) is a top view of the pulp bucket;

FIG. 33 is a front view of the grout tube; FIG. 33(a) is an enlarged view of a portion of the section A in FIG. 33; FIG. 33(B) is a partial enlarged view of section B in FIG. 33;

FIG. 34 is a partial cross-sectional view of a stirring device; FIG. 34(a) is an enlarged view of a portion of the stirring device of FIG. 34;

FIG. 35 is an isometric view of the gantry; FIG. 35(a) is a left side view of the gantry; FIG. 35(b) is a top view of the gantry;

in the figure, a pressing device I, a hot-pressing die II, a hot-pressing device III, a stirring device IV and a frame V are arranged;

i-01-a threaded connecting rod, I-02-a lifting frame, I-03-a flange face end cover sealing ring, I-04-a flange face end cover, I-05-a flange face end cover positioning bolt, I-06-a flange face end cover screwing nut, I-07-a common flat washer, I-08-a piston compression bar, I-09-a clamping nut, I-10-a positioning nut and I-11-a reset spring;

II-01-a core backing plate, II-02-an upper die, II-03-a cavity, II-04-a lower die and II-05-a slurry inlet plate;

III-01-workbench, III-02-flange ring positioning screw, III-03-flange ring, III-04-machine plate positioning screw, III-05-machine plate, III-06-mould nesting, III-07-grout outlet end cover, III-08-push rod, III-09-oil bath box temperature thermocouple, III-10-hand hole end cover thread pressure head, III-11-oil bath box, III-12-hand hole end cover, III-13-oil injection joint, III-14-hand hole end cover transverse fastening rod and III-15-grout barrel rubber sealing washer; III-16-an electric heating device, III-17-a slurry barrel and III-18-a grouting pipe;

IV-01-impeller, IV-02-tapered roller bearing, IV-03-pulp barrel base sealing ring, IV-04-packing, IV-05-oil bath base sealing ring, IV-06-O type sealing ring, IV-07-gland, IV-08-thrust ball bearing, IV-09-transmission shaft, IV-10-pressing sleeve, IV-11-driving pulley and IV-12-motor;

v-01-a motor base, V-02-a temperature control box nest, V-03-a threaded support rod base, V-04-a bolt through hole and V-05-a pedal base;

i-0101-dop, I-0201-boss, I-0202-positioning round hole, I-0203-flange boss, I-0204-piston press rod stroke cavity, I-0205-positioning round hole, I-0206-press rod positioning boss, I-0207-transverse connecting rod, I-0401-flange surface end cover positioning round hole, I-0402-high-pressure gas pipe screwed joint, I-0403-positioning boss, I-0801-piston head, I-0802-press rod, I-0803-lubricating oil groove, I-0901-round hole nut and I-0902-push rod;

II-0101-base plate, II-0102-core base plate positioning cylinder, II-0103-core clamp block, II-0104-type core column, II-0201-upper template, II-0202-upper mold positioning cylinder, II-0301-cavity positioning round hole, II-0302-model cavity, II-0303-convex rib, II-0401-pin, II-0402-lower die bottom plate, II-0403-lower template, II-0501-slurry inlet plate positioning round hole, II-0502-core positioning hole and II-0503-slurry inlet;

III-0101-workbench threaded counter bore, III-0102-workbench flange boss, III-0103-oil bath tank positioning slot, III-0104-workbench positioning through hole, III-0105-semicircular notch, III-0106-workbench reinforcing rib, III-0107-air valve boss, III-0108-air valve boss threaded counter bore, III-0301-flange embedded ring inner boss, III-0302-flange embedded ring countersunk head through hole, III-0303-flange embedded ring internal thread counter bore, III-0304-slurry barrel positioning slot, III-0305-oil injection joint threaded connecting hole, III-0306-box temperature measurement thermocouple threaded connecting hole, III-0501-hand hole end cover fastening oil bath raised head, III-0502-hand hole, III-0503-machine plate countersunk head through hole, III-0504-grout outlet, III-0601-mould nesting grouting port, III-0602-mould nesting side reinforcing rib, III-0701-grout outlet end cover threaded connection boss, III-0702-grouting pipe threaded connection head, III-1101-oil bath box supporting lug ring, III-1102-oil bath box positioning countersunk head through hole, III-1103-oil bath box lug ring reinforcing rib, III-1104-oil outlet, III-1201-hand hole end cover air tap joint, III-1202-hand hole end cover threaded pressure head positioning countersunk hole, III-1203-spoiler, III-1601-electric heating pipe saddle, III-1602-electric heating device positioning through hole, III-1603-electric heating pipe, III-1701-grout barrel supporting lug ring, III-1702-slurry barrel countersunk through hole, III-1703-slurry barrel internal thread counterbore, III-1704-slurry barrel ear ring reinforcing rib, III-1801-slurry injection pipe A, III-1802-slurry outlet electric heating device, III-1803-thermocouple, III-1804-slurry injection pipe B and III-1805-O type sealing ring;

II-010101-core plate locating hole, II-010102-core clamp splice fixing hole, II-010103-core plate locating cylinder fixing hole, II-010301-core fixing hole, II-020101-upper die locating cylinder fixing hole, II-020102-core clamp splice locating hole, II-020103-upper die locating hole, II-040201-lower die base plate pin locating hole, II-040202-lower die base plate locating hole, II-040203-transition fillet cavity, II-040301-lower die plate pin locating hole, II-040302-lower die plate cavity, II-040303-lower die plate locating hole.

Detailed Description

The application provides an integrated hot-pressing forming machine for alumina ceramics, which comprises five parts, namely a pressing device, a hot-pressing mold, a hot-pressing device, a stirring device and a rack device, wherein the pressing device and the hot-pressing device are fixed on the rack;

example 1

The following will further describe an alumina ceramic integrated hot press molding machine disclosed in this embodiment with reference to fig. 1 to fig. 35 (b);

as shown in figure 1, the alumina ceramic integrated hot-pressing forming machine comprises five parts, namely a pressing device I, a hot-pressing die II, a hot-pressing device III, a stirring device IV and a rack V, wherein the pressing device I is positioned on a threaded support rod base V-03 on the rack V through a clamping head I-0101 on a threaded connecting rod I-01, and is fixedly connected to the rack V through rotating a clamping nut I-09, wherein a piston pressure rod I-08 in a piston pressure rod stroke cavity I-0204 of a lifting rack I-02 is right opposite to the center of a slurry outlet III-0504. The mould II is positioned in a mould nest III-06 on the hot-press device III, and a pulp inlet II-0503 on the pulp inlet plate II-05 on the mould II is connected with a mould nest grouting opening III-0601 in the mould nest III-06. The workbench positioning through hole III-0104 on the workbench III-01 of the hot-pressing device III is right opposite to the bolt through hole V-04 on the frame V, and the hot-pressing device III is fixedly connected and fixedly connected on the frame V through bolt connection. The motor IV-11 in the stirring device IV is connected with a motor support V-01 fixedly connected to the frame V through a bolt, the impeller IV-01 and a transmission shaft IV-09 are fixedly connected to the inner base of the pulp barrel III-17 through a gland IV-08, and the motor drives the impeller to rotate through a belt.

As shown in figure 2, figure 2(a), figure 2(b) and figure 3, the pressing device I consists of a threaded connecting rod I-01, a lifting frame I-02, a flange face end cover sealing ring I-03, a flange face end cover I-04, a flange face end cover positioning bolt I-05, a flange face end cover screwing nut I-06, a common flat washer I-07, a piston pressure rod I-08, a clamping nut I-09, a positioning nut I-10 and a return spring I-11, wherein the piston pressure rod I-03 is positioned in a piston pressure rod stroke cavity I-0204 in the lifting frame I-02, the return spring I-11 is arranged below the piston pressure rod I-03, the flange face end cover sealing ring I-03 and the flange face end cover I-04 are arranged at the open upper end of the piston pressure rod stroke cavity I-0204, wherein the flange face end cover I-04 is screwed with a nut I-06 through the flange face end cover, and the flange face end cover positioning bolt I-05 and a common flat washer I-07 are fixedly connected on the lifting frame I-02. The lifting frame I-02 is fixed on the threaded connecting rod through a positioning nut I-10 and a clamping nut I-09. The height of the piston compression bar I-08 positioned in the lifting frame I-02 relative to the mould II can be adjusted by rotating the positioning nut I-10, and the lifting frame I-02 can be fixed by rotating the clamping nut I-09. The pressing device is compact in structure, and has the advantages of simple structure and low fault rate under the condition of meeting the use requirement. When the air valve is stepped, high-pressure gas is divided into two parts and respectively enters the slurry barrel III-17 and the piston press rod stroke cavity I-0204, air entering the piston press rod stroke cavity I-0204 can be prior to entering the slurry barrel III-17, and therefore the risk that slurry is splashed out because grouting is started before the mold II is not compacted is avoided.

As shown in fig. 5, 5(a) and 5(b), the bottom of the threaded connecting rod I-01 is provided with a clamping head I-0101, the clamping head I-0101 comprises a cylindrical base and four convex ribs arranged on one side of the base, wherein the cylindrical base limits the axial movement of the threaded connecting rod I-01, the four convex ribs limit the threaded connecting rod I-01 to rotate around the axial direction, ridge lines of the four convex ribs are provided with transition fillets, and the length of the transition fillets is smaller than the height of the boss of the rack.

As shown in figure 6, figure 6(a), figure 6(b) and figure 6(c), bosses I-0201 are respectively arranged at the two sides of the lifting frame I-02, and the boss I-0201 is provided with a positioning round hole I-0202, the bosses I-0201 at the two sides are connected by a transverse connecting rod I-0207, a flange boss I-0203 is arranged at one side of the middle part of the transverse connecting rod I-0207, the axial line of the transverse connecting rod I-0107 is parallel to the axial lines of the bosses I-0201 at the two sides, six positioning round holes I-0205 are uniformly arranged on the flange connecting surface of the flange boss I-0203 along the circumferential direction, a pressure rod positioning boss I-0206 is arranged at the other side of the middle part of the transverse connecting rod I-0107, the axial line of the piston-pressure rod stroke cavity I-0204 is collinear with the axial line of the flange boss I-0203, and the piston-pressure rod stroke cavity I-0204 is arranged in the flange boss I-0203 and the pressure rod positioning boss I-0206 along the axial direction.

As shown in fig. 7, fig. 7(a), fig. 7(b), fig. 7(c) and fig. 7(d), one side of the flange surface end cover I-04 along the axial direction is provided with a high-pressure gas pipe screwed joint I-0402, a transition fillet is arranged at the junction of the high-pressure gas pipe screwed joint I-0402 and the flange surface end cover I-04, the other side is provided with a positioning boss I-0403, a through hole is arranged at the center of the flange surface end cover I-04 along the axial direction, an internal thread is arranged inside the through hole, and six flange surface end cover positioning round holes I-0401 are uniformly arranged at the outer edge of the flange surface end cover I-04 along the circumferential direction.

As shown in fig. 8, fig. 8(a) and fig. 8(b), one end of the piston compression rod I-08 is provided with a piston head I-0801, and the other end is provided with a compression rod I-0802, wherein a lubricating oil groove I-0803 is formed in the circumferential outer surface of the piston head I-0801, and a sealing effect is achieved through lubricating oil.

As shown in fig. 9, 9(a), 9(b) and 9(c), the clamping nut I-09 is composed of a round hole nut I-0901 and a push rod I-0902, the outer surface of the round hole nut I-0901 is provided with a counter bore along the radial direction, the surface of the round hole nut I-0901 is provided with an anti-slip knurl, the inner through hole is provided with an internal thread, and the push rod I-0902 and the counter bore of the round hole nut I-0901 are fixedly connected together through welding.

As shown in the figures 10, 10(a) and 10(b), the outer surface of the positioning nut I-10 is carved with anti-skid knurls, and the inner through hole is carved with internal threads, so that the main function is to change the height of the piston compression bar I-08 positioned in the lifting frame I-02 relative to a mould through rotation.

As shown in the figure 11, the figure 12, the figure 13 and the figure 13(a), the hot-pressing die II consists of five parts, namely a core backing plate II-01, an upper die II-02, a cavity II-03, a lower die II-04 and a pulp inlet plate II-05, wherein a core backing plate positioning cylinder II-0102 on the core backing plate II-01 respectively penetrates through an upper die positioning hole II-020103 in the upper die II-02, a cavity positioning round hole II-0301 on the cavity II-03, a lower die base plate positioning hole II-040202 and a lower die plate positioning hole II-040303 on the lower die II-04 and a pulp inlet plate positioning round hole II-0501 on the pulp inlet plate II-05. The core clamp blocks II-0103 respectively penetrate through core clamp block positioning holes II-020102 in the upper mold II-02, the bottom ends of the core columns II-0104 penetrate through core positioning holes II-0502 in the slurry inlet plate II-05, so that the positions of the cores are determined in the cavities, and the upper mold positioning cylinders II-0202 in the upper mold II-02 respectively penetrate through four groups of core base plate positioning holes II-010101 in the core base plate II-01. This hot pressing mould II simple structure, convenient operation need not be with the help of other instruments in the form removal compound die process, is convenient for improve production efficiency.

As shown in FIG. 14, FIG. 14(a), FIG. 14(b), FIG. 14(c), FIG. 15(a), FIG. 15(b), FIG. 15(c), FIG. 16(a), FIG. 16(b), FIG. 16(c), the core backing plate II-01 is composed of four parts of a backing plate II-0101 core backing plate positioning cylinder II-0102, a core clamp block II-0103, and a core column II-0104, four core backing plate positioning holes II-010101 are respectively arranged on the backing plate II-0101 along the transverse and longitudinal symmetrical planes, two core clamp block fixing holes II-010102 and two core backing plate positioning cylinder fixing holes II-010103 are respectively arranged along the longitudinal symmetrical plane, a core fixing hole II-010301 is arranged on the core clamp block II-0103, four bosses are arranged at one end of the core clamp block, a chamfer transition is arranged between the bosses and the core clamp block II-0103 main body, fillet transition is arranged at four long edges of the core column II-0104, so that the drawing is convenient, the collapse and deformation of the inner cavity of a casting caused by stress concentration are prevented, the interference connection is formed between the core clamping block II-0103 and the core clamping block fixing hole II-010102 on the base plate II-0101, the interference connection is formed between the core column II-0104 and the core fixing hole II-010301 on the core clamping block II-0103, and the interference connection is formed between the core base plate positioning cylinder II-0102 and the core base plate positioning cylinder fixing hole II-010103 on the base plate II-0101.

As shown in the figure 17, the figure 17(a), the figure 17(b), the figure 17(c) and the figure 17(e), an upper die II-02 is composed of an upper die plate II-0201 and an upper die positioning cylinder II-0202, four upper die positioning cylinder fixing holes II-020101 are respectively arranged on the upper die plate II-0201 along a transverse symmetrical surface and a longitudinal symmetrical surface, a core clamp block positioning hole II-020102 and an upper die positioning hole II-020103 are symmetrically arranged along the longitudinal symmetrical surface, a flower-shaped through hole is arranged at the lower side of a circular counter bore arranged at the upper side of the core clamp block positioning hole II-020102, and the upper die positioning cylinder II-0202 is fixedly connected with the four upper die positioning cylinder fixing holes II-020101 on the upper die plate II-0201.

As shown in fig. 18, fig. 18(a), fig. 18(b), fig. 18(c) and fig. 18(d), cavity positioning round holes II-0301 and a model cavity II-0302 are respectively arranged on the cavity II-03 along a longitudinal symmetry plane, wherein transition fillets are arranged on the upper side of the model cavity II-0302 to facilitate drawing, and convex ribs II-0303 are arranged in the cylindrical cavity.

Referring to FIG. 19, FIG. 19(a), FIG. 19(b), FIG. 19(c), FIG. 19(d), FIG. 19(e), FIG. 19(f), the lower mold II-04 is composed of three parts of pins II-0401, lower mold base plate II-0402, and lower mold plate II-0403, wherein the lower mold base plate II-0402 is provided with four sets of lower mold base plate pin positioning holes II-040201 along the longitudinal symmetry plane and the transverse symmetry plane, two sets of lower mold base plate positioning holes II-040202 along the longitudinal symmetry plane, and transition fillet cavity II-040203, wherein the transition fillet cavity II-040203 is provided for facilitating the mold removal and reducing the stress concentration of the casting, the lower mold plate II-0403 is provided with four sets of lower mold plate pin positioning holes II-040301 along the longitudinal symmetry plane and the transverse symmetry plane, and two sets of lower mold plate cavities II-040302 along the longitudinal symmetry plane, the lower die base plate II-0402 and the lower die plate II-0403 are fixedly connected together through four groups of pin positioning holes II-040201 of the lower die base plate and pins II-0401 of the lower die plate pin positioning holes II-040301.

As shown in fig. 20, fig. 20(a) and fig. 20(b), the pulp inlet plate II-05 is respectively provided with pulp inlet plate positioning round holes II-0501 and core positioning holes II-0502 symmetrically along the longitudinal symmetry plane, a pulp inlet II-0503 is arranged below the transverse symmetry plane of the pulp inlet plate II-05, and the pulp inlet II-0502 is respectively communicated with two cavities of the mold.

The green body obtained by hot-press casting is calcined to obtain the product. The drying combustion shrinks, and a certain processing allowance is remained in the processing, so that the size of the die is larger than the required size of the product. Let a be a dimension measured in a certain direction of the green body, b be a dimension of the product after firing, Δ be a processing margin (Δ ═ 0 without processing), and a shrinkage rate be expressed.

Wherein, the shrinkage calculation formula is as follows:

in addition, shrinkage is also defined as:

referring to FIG. 21, FIG. 21(a), FIG. 21(b), FIG. 21(c), FIG. 22 and FIG. 23, the hot press unit oil bath case III-11 is fixedly connected to the work table III-01 by means of hexagon socket head cap screws, the upper part of the opening of the oil tank III-11 is provided with a flange insert ring III-03 which is fixedly connected to the work table III-01 by means of flange insert ring positioning screws III-02, the lower part of the flange insert ring III-03 is provided with an electric heating unit III-16 which is fixedly connected to the flange insert ring III-03 by means of hexagon socket head cap screws, a temperature measuring mailbox thermocouple III-09 is fixedly connected to the flange insert ring III-03 by means of screw threads, an oil injection connector III-13 is also fixedly connected to the flange insert ring III-03 by means of screw threads, a slurry barrel III-17 is provided on the upper part of the flange insert ring III-03 and is fixedly connected to the flange insert ring III-03 by means of hexagon socket head cap screws, a flange sealing rubber ring and a machine plate III-05 are sequentially arranged on the upper part of the pulp barrel III-17 and are fixedly connected to the pulp barrel III-17 together through a hexagon socket head cap screw, a rubber sealing ring and a pulp outlet end cover III-07 are sequentially arranged on the upper part of a pulp outlet of the machine plate III-05, the pulp outlet end cover III-07 is in threaded connection with the machine plate III-05, a rubber sealing ring and a hand hole end cover III-12 are sequentially arranged on the upper part of a hand hole of the machine plate III-05, a hand hole end cover threaded pressure head III-10 is in threaded connection with a hand hole end cover transverse fastening piece III-14, the hand hole end cover threaded pressure head III-10 is driven to rotate by rotating a push rod III-08, the hand hole end cover transverse fastening piece III-14 moves upwards and is fastened with a hand hole end cover raised head III-0501, and the lower end of the hand hole end cover threaded pressure head III-10 is fastened with the hand hole end cover threaded pressure head III The corrugated pressing head positioning counter bores III-1202 are contacted, so that the hand holes are in a sealing state. A grouting pipe III-18 is arranged below the grout outlet end cover III-07 and is connected with the grout outlet end cover III-07 through threaded connection. Mineral oil or vegetable oil is filled between the oil bath box III-11 and the slurry barrel III-17, oil bath is a hot bath method using oil as a hot bath substance, generally between 100 ℃ and 250 ℃, and compared with other substances, the oil bath has the advantages of fast temperature rise, slow heat dissipation and better slurry heating effect due to larger specific heat capacity of the oil.

As shown in FIG. 24, FIG. 24(a), FIG. 24(b) and FIG. 24(c), a working platform flange boss III-0102 is provided on the inner side of the working platform III-01 along the circumferential direction, positioning grooves III-0103 for oil bath tank are symmetrically provided in the longitudinal symmetry plane and the transverse symmetry plane of the working platform flange boss III-0102, six working platform screw thread counter bores III-0101 are uniformly provided on the upper surface of the working platform flange boss along the circumferential direction, wherein four working platform reinforcing ribs III-0106 are provided along the diagonal line of the working platform at the junction of the lower surface of the working platform III-01 and the working platform flange boss III-0102, four sets of working platform positioning through holes III-0104 and a set of semicircular notches III-0105 are symmetrically provided at the outer edge of the working platform III-01, an air valve boss III-0107 is provided at the upper left corner of the working platform III-01, four air valve boss thread counter bores III-0108 are uniformly arranged on the upper edge of the air valve boss along the circumferential direction.

As shown in figure 25, figure 25(a), figure 25(b) and figure 25(c), the inner side of the flange embedded ring III-03 is provided with a flange embedded ring inner boss III-0301 along the circumferential direction, the pulp barrel positioning grooves III-0304 are symmetrically arranged in the longitudinal symmetry plane and the transverse symmetry plane, six flange embedded ring inner thread counter bores III-0303 are uniformly arranged on the upper surface of the flange embedded ring III-03 along the circumferential direction, six flange embedded ring counter bore III-0302 are uniformly arranged on the upper surface of the flange embedded ring III-03 along the circumferential direction, an oil filling connector thread connecting hole III-0305 and an oil bath box temperature measuring thermocouple thread connecting hole III-0306 are simultaneously arranged on the flange embedded ring III-03 along the circumferential direction.

As shown in fig. 26, fig. 26(a) and fig. 26(b), eight machine plate countersunk through holes III-0503 are uniformly formed in the upper surface of the machine plate along the circumferential outer edge, hand holes III-0502 and a slurry outlet III-0504 are symmetrically formed along the symmetry plane, and two hand hole end cover fastening bosses III-0501 are symmetrically formed on two sides of the hand holes III-0502.

As shown in fig. 27, 27(a) and 27(b), a mould nest grouting opening III-0601 is arranged at the bottom of the mould nest III-06, and four mould nest side reinforcing ribs III-0602 are uniformly arranged along the periphery of the side surface of the mould nest III-06.

As shown in fig. 28, fig. 28(a) and fig. 28(b), the grout outlet end cover III-07 is composed of a grout outlet end cover threaded connection boss III-0701 and a grouting pipe threaded connector III-0702, threads are arranged on the outer surface of a lower boss of the grout outlet end cover threaded connection boss III-0701, and internal threads are arranged on the inner surface of the grouting pipe threaded connector III-0702.

As shown in fig. 29, fig. 29(a) and fig. 29(b), an oil bath box supporting lug ring III-1101 is circumferentially arranged at the barrel opening of the oil bath box III-11, six oil bath box positioning through holes III-1102 are circumferentially and uniformly arranged on the oil bath box supporting lug ring, four oil bath box lug ring reinforcing ribs III-1103 are uniformly arranged at the junction of the oil bath box supporting lug ring and the outer surface of the cylinder body, and an oil outlet III-1104 is arranged at the bottom of the cylinder body.

As shown in the figure 30, the figure 30(a) and the figure 30(b), a hand hole end cover air nozzle joint III-1201 is eccentrically arranged on the upper surface of the hand hole end cover III-12, a hand hole end cover threaded pressure head positioning counter bore III-1202 is arranged at the circle center of the hand hole end cover air nozzle joint, and a spoiler III-1203 is arranged below an air outlet hole of the hand hole end cover III-12, so that the influence of high-speed air flow on the surface of the slurry is prevented.

As shown in fig. 31 and fig. 31(a), the electric heating device III-16 is composed of an electric heating pipe pallet III-1601 and an electric heating pipe III-1603, eight electric heating device positioning through holes III-1602 are uniformly arranged on the upper surface of the belt heating pipe along the circumferential direction, and in order to reduce the weight, a hollow design is adopted on the electric heating device III-1603, the electric heating pipe III-1603 is composed of eight groups of U-shaped electric heaters in parallel, any group of short circuits cannot generate obvious influence on the temperature field of the oil bath box, and the distribution has the characteristics of high heating efficiency, fast temperature rise and low failure rate.

As shown in fig. 32, fig. 32(a) and fig. 32(b), a pulp barrel supporting ear ring III-1701 is arranged at the barrel opening of the pulp barrel III-17 along the circumferential direction, eight groups of pulp barrel countersunk head through holes III-1702 and pulp barrel internal thread countersunk holes III-1703 are uniformly arranged on the upper surface of the pulp barrel supporting ear ring III-1701 along the circumferential direction, and four groups of III-1704 pulp barrel ear ring reinforcing ribs are uniformly arranged at the junction of the pulp barrel supporting ear ring III-1701 and the outer surface of the barrel body of the pulp barrel III-17 along the circumferential direction.

As shown in fig. 33, 33(a) and 33(b), the grouting pipe consists of five parts, namely a grouting pipe A III-1801, a grout outlet electric heating device III-1802, a thermocouple III-1803, a grouting pipe B III-1804 and an O-shaped sealing ring III-1805, wherein an external thread is arranged at the interface of the grouting pipe A III-1801 and a grout outlet end cover III-07, a grout outlet electric heating device III-1802 is arranged below the external thread, an internal thread is arranged at the interface of the grouting pipe A III-1801 and a grouting pipe B III-1804, the grouting pipe B III-1804 is in threaded connection with the grouting pipe A III-1801, and the O-shaped sealing ring III-1805 is arranged at the joint of the grouting pipe A III-1803 and the grouting pipe B III-1803. Wherein, the heat transmission mode of the slurry outlet electric heating device III-1802 is mainly heat conduction.

There are three ways of heat transfer, thermal convection, thermal conduction and thermal radiation, and it is assumed herein that the outlet electrothermal device III-1802 operates in a vacuum environment, and thus involves only thermal conduction and thermal radiation. The main theory of heat transfer is the fourier law:

wherein g is the calorific value per unit volume and per unit time; k is a thermal conductivity coefficient;

the heat diffusion coefficient is the heat conduction coefficient, the heat conduction belongs to linear calculation, and the calculation error is small.

As shown in fig. 34 and 34(a), the upper end of a transmission shaft IV-09 is provided with external threads, an impeller IV-01 is tightly attached to a conical roller bearing IV-02 through the combined action of a nut at the upper end of the transmission shaft IV-09 and a gland IV-07, a counter bore is arranged at the center of the upper surface of the impeller IV-01, a slurry inlet of a grouting pipe III-18 is positioned above the counter bore to reduce the residual slurry to the maximum extent, a cavity between a slurry barrel III-17 and the transmission shaft IV-09 is filled with four circles of packing IV-04, a gland IV-10 is arranged below the cavity, a three-circle O-shaped gasket IV-06 is arranged between the gland IV-10 and the slurry barrel III-17, a thrust IV-08 is arranged below the gland IV-10, and a conical roller bearing is arranged below a boss of the transmission shaft IV-09, the inner part of the gland IV-07 is provided with internal threads, the gland IV-07 is connected with the pulp barrel III-17 through threads, an oil bath base sealing ring IV-05 is arranged between the gland IV-17 and the oil bath box III-11, a pulp barrel base sealing ring IV-03 is arranged between the gland IV-07 and the pulp barrel III-17, the gland IV-07 is screwed with the pulp barrel III-17 through threads, so that the packing IV-04 is filled in a cavity between the transmission shaft IV-09 and the pulp barrel III-17, the sealing is carried out by the labyrinth effect of the packing, the outer end of the motor IV-11 is provided with a driving belt wheel, and the driving belt wheel IV-01 is driven to rotate so as to realize the stirring purpose.

As shown in figure 35, figure 35(a) and figure 35(b), a motor base V-01 is arranged on the side surface of the frame, four motor positioning through holes are formed in the motor base V-01, a temperature control box nesting V-02 is arranged at the upper left corner of the frame, threaded support rod bases V-03 are arranged on two sides of the frame, a cross-shaped positioning groove is formed in the threaded support rod bases V-03, eight bolt through holes IV-04 are symmetrically formed in the upper surface of the frame, a pedal base V-05 is arranged at a cross beam at the lower part of the frame, and four bolt connecting holes are.

The specific working process of the scheme is as follows:

firstly, a mold which is subjected to mold closing is placed in a mold nest III-06, a positioning nut I-10 positioned on a threaded connecting rod I-01 is manually adjusted, a lifting frame I-02 is adjusted to a proper height, a piston pressure rod I-08 pressure head positioned in a piston pressure rod stroke cavity I-0204 is enabled to be approximately three centimeters away from the mold, and then a clamping nut I-09 is rotated to fix the lifting frame I-02. Then, the motor IV-12 is started to drive the impeller IV-01 positioned in the pulp barrel III-17 to rotate, so that the pulp is stirred, the electric heating device III-16 is started through the temperature control box, the heating power of the electric heating device III-16 is timely regulated and controlled according to the temperature fed back by the oil bath box temperature thermocouple III-09 in the temperature control box and the temperature requirement of the pulp hot-press casting molding in the pulp barrel III-17, then the pedal positioned on the frame V is stepped, the air valve is opened, high-pressure gas is divided into two parts, one part enters the piston compression bar stroke cavity I-0204 through the high-pressure air pipe threaded connector I-0402 on the flange surface end cover I-04 to push the piston compression bar I-08 to move downwards to compress the mold II, the high-pressure gas enters the pulp barrel III-17 through the hand hole end cover air nozzle connector III-12 positioned on the other hand hole end cover III-12, the slurry barrel flows into the die cavity through the grouting pipe III-18, the working power of the slurry outlet electric heating device is timely regulated and controlled according to the molding quality of the blank and the temperature fed back to the temperature control box by the thermocouple III-1803 positioned on the grouting pipe III-18, the pedal is loosened and the air valve is closed according to the molding condition of the observed die, the piston pressure rod I-08 moves upwards under the action of the return spring I-11, the pressure of the slurry barrel III-17 is relieved, the die is taken out, the die is opened, the sprue is cut, the blank is taken out, the die is closed after being cleaned, cooled and dried, and the process is repeated.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (9)

1. An alumina ceramic integrated hot-pressing forming machine is characterized by comprising a pressing device and a hot-pressing device, wherein the pressing device and the hot-pressing device are fixed on a rack;

the pressing device enables one path of high-pressure gas to act on the hot-pressing die, and the other path of high-pressure gas enters the hot-pressing device to enable the slurry to flow into the cavity of the hot-pressing die;

the stirring device is used for stirring the slurry in the hot pressing device, so that the alumina ingredients are more uniformly distributed in the slurry;

temperature measuring elements for detecting the temperature of the internal oil and the temperature of the slurry at the slurry outlet are respectively arranged in the hot-pressing device, and the power of the electric heating device is regulated and controlled in real time according to the temperature detected by the temperature measuring elements, so that the aim of accurately controlling the temperature is fulfilled.

2. The alumina ceramic integrated hot-pressing forming machine as claimed in claim 1, wherein the compressing device comprises threaded connecting rods at two sides of the lifting frame, a piston press rod and a return spring arranged in a stroke cavity of the press rod of the lifting frame, and a flange surface end cover arranged on a boss on the lifting frame, the lifting frame is fixed on the threaded connecting rods, a high-pressure gas pipe is connected with the flange surface end cover, high-pressure gas is divided into two parts through a gas valve and flows out simultaneously, wherein one part flows to the stroke cavity of the piston press rod on the lifting frame through the high-pressure gas pipe to push the piston press rod to compress a hot-pressing mold.

3. The alumina ceramic integral hot-pressing forming machine as claimed in claim 1, wherein the core plate of the hot-pressing mold is provided with core plate positioning cylinders, the core plate backing plate, the upper mold, the cavity, the lower mold and the slurry inlet plate are sequentially positioned and assembled through the core plate positioning cylinders, and the bottom of the lower mold and the junction of the core clamping block and the inner part of the cavity of the mold are provided with fillet transitions.

4. The alumina ceramic integrated hot-pressing forming machine as claimed in claim 1, wherein the hot-pressing device comprises an oil bath box and a flange embedded ring arranged on the upper part of a supporting lug ring of the oil bath box, and a slurry barrel and a slurry outlet end cover are sequentially arranged on a boss on the inner side of the flange embedded ring;

oil is filled between the oil bath box and the slurry barrel, the temperature of the oil is controlled by the electric heating device and the thermocouple which are arranged inside, a slurry injection pipe is arranged inside the slurry barrel and below the slurry outlet end cover, and an electric heating device and the thermocouple are arranged above the slurry injection pipe and close to the position where the slurry outlet is arranged.

5. The alumina ceramic integrated hot-pressing forming machine as claimed in claim 1, wherein the stirring device comprises an impeller arranged at the bottom of the slurry barrel, a motor arranged on the frame and a transmission device; the alumina ingredients are more uniformly distributed in the slurry under the stirring action of the impeller.

6. The alumina ceramic integral hot-pressing forming machine as claimed in claim 1, wherein the piston compression bar in the compressing device is opposite to the center of the slurry outlet, and the height of the piston compression bar is adjusted through the interaction of a positioning nut and a tightening nut on the threaded connecting rod, so that the alumina ceramic integral hot-pressing forming machine is suitable for dies with different heights.

7. The integrated hot-pressing forming machine for alumina ceramics as claimed in claim 4, wherein the oil bath box is internally provided with an electric heating device consisting of a plurality of U-shaped heating pipes and a temperature thermocouple, and the working power of the electric heating device is regulated and controlled according to the reading fed back by the temperature thermocouple on the temperature control box.

8. The integrated hot-pressing forming machine for alumina ceramics as claimed in claim 4, wherein the grouting pipe inside the grouting barrel is provided with a thermocouple and a grout outlet electric heating device, and the working power of the grout outlet electric heating device is regulated and controlled according to the reading on the temperature box fed back by the thermocouple on the grouting pipe.

9. The integrated hot press forming machine for alumina ceramics as claimed in claim 1, wherein packing material is filled between the transmission shaft of the stirring device and the slurry barrel, the pressing cover of the stirring device is located at the bottom of the oil bath box and is internally provided with internal threads, wherein the pressing cover is in threaded connection with the raised head of the slurry barrel, and the pressing cover is in clearance fit with the oil outlet of the oil bath box.

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