A kind of dry pressing molding mould of porous ceramic plate
Technical field
The utility model relates to the dry pressing molding mould of ceramic die molded technical field, particularly a kind of porous ceramic plate.
Background technology
Environment and energy problem are the key subjects that threatening human survival, and along with going from bad to worse and the energy deficient gradually of environment, energy-saving and emission-reduction have been subjected to global common concern; Ceramic burner plate is as a kind of new ceramics product of special loose structure, there is low heat expansion, specific area is large, thermal insulation good, the characteristics such as lightweight, the combustion-supporting product of accumulation of heat that to be specially adapted to using combustion gas be burner body and as the carrier of various catalyst, in recent years in heating, save the aspects such as the energy and purifying automobile tail gas and be widely used.
The infrared ceramic burner plate is the more common combustion-supporting product of a kind of accumulation of heat; This kind of ceramic wafer is modified into the staggered solid type of ripple by surface by simple plane formula usually, increase specific area and burning face long-pending, thereby play the combustion-supporting effect of better accumulation of heat, realize burning more completely and there is no the flame seedling, reaching the infrared heating effect, thereby realize the requirement of low energy consumption, high combustion rate and high-environmental, overcome common plane formula ceramic wafer flame when fuel gas buring long, burn abundant not, cause energy consumption high, discharge the problems such as not up to standard; If apply high-quality combustion catalyst on ceramic wafer, can also make effects of energy saving and emission reduction better; The demand of suchlike ceramic burner panel products is more and more, is widely used in field that heating, food and drink and Industrial Stoves etc. are higher to energy-conservation emission request.
Dry-pressing formed is a kind of shaping method of ceramics of very simple, intuitive, will pour in the steel mold cavity of definite shape through screening, powder that proportioning is suitable, by means of punch, by impressed pressure, just powder pressing can be become to base substrate; Dry pressure formed, equipment, mould and technique are simple, cost is low, operating maintenance is convenient; In existing forming process of ceramics technology, porous ceramics adopts extrusion moulding, slip casting, hot die-casting molding method and injection moulding more, and these methods of forming have been compared corresponding shortcoming with dry pressing; The pressure of extrusion moulding, slip casting and hot die-casting molding method, much smaller than dry pressing, is unfavorable for forming fine and close blank.The size ratio of extrusion moulding, hot die-casting molding method and injection moulding Raw is relatively large, also influential to blank quality; And these three kinds of technological requirement raw materials are good in certain pressure effect current downflow, so the addition of their plasticiser is more a lot of than dry-pressing formed height, but too much plasticiser not only can make product produce segregation phenomena, affects the use of goods; Also can make blank shrink in the degreasing in later stage and sintering process excessive, easily produce and cave in and be out of shape, affect the final mass of product.
But existing dry-pressing technology is mainly used to the ceramic products such as the relatively simple sheet of molding structure, plate, piece, and for the ceramic burner plate of porous class such high density holes and there is the not application of product on the staggered solid type surface of ripple, its difficulty is mainly the restriction of the moulding process, mould and the former that are subject to porous ceramic plate; At present, the domestic mould dry-pressing formed for porous ceramic plate is still incomplete, and in process, controllability is poor, and Product Precision is low, and production cost is high, the process complexity, and mould does not have replaceability.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, provides a kind of and is easy to control, has replaceability, can prepare the mould of high-precision high-quality porous ceramic plate.
Another purpose of the present utility model also is to provide that a kind of technical process is simple, the dry-pressing formed method of the porous ceramic plate of low cost of manufacture.
The technical solution of the utility model is summarized as follows:
A kind of dry pressing molding mould of porous ceramic plate, comprise upper die and lower die two parts, it is characterized in that: described patrix is comprised of top board, cope match-plate pattern and punch, and top board, cope match-plate pattern and punch are fixedly connected sequentially from top to bottom and are integral and are fixed on by top board on the moving beam of hydraulic press; Counterdie comprises material circle, material frame, stock supporting plate, moulding pin and fixed part thereof, mould emptier, driving hydraulic cylinder and supports fixed head; Counterdie is fixed on workbench by support and base plate, and upper die and lower die are connected by four long guide pillars, to guarantee the centering of upper and lower mould; The material frame that can change of the upper installation of material circle, have the penetrating material chamber ,Liao Quan both sides identical with product length and width size on the material frame and respectively connect a driving hydraulic cylinder that specification is identical; Stock supporting plate is placed in below material circle, with the material frame, coordinates and forms feed compartment, and the moulding pin is fixed as the core of mould and by the moulding pin fixed part be arranged on below stock supporting plate through the hole of stock supporting plate; Stock supporting plate and moulding pin and fixed part thereof are positioned at and support the fixed head top; Mould emptier is comprised of jacking block, push pedal, knock-pin and tailing axle; push pedal is by four guide pillar guiding that are arranged on moulding pin fixed part; jacking block is through the slotted eye supported on fixed head, and upper and lower end is connected with push pedal with stock supporting plate respectively, and push pedal is connected with hydraulic press with tailing axle by knock-pin.
The dry pressing molding mould of described a kind of porous ceramic plate is characterized in that: be symmetrically installed with four adjustable stopping means on described cope match-plate pattern, prevent from when punch is descending making the bending of moulding pin or fracture; A position sensor is respectively installed in the same side in top board, material circle and push pedal, for the accurate control of mold stroke position.
The dry pressing molding mould of described a kind of porous ceramic plate is characterized in that: the thickness of described material frame is 2~4 times of ceramic wafer product thickness.
The dry pressing molding mould of described porous ceramic plate is characterized in that: described stock supporting plate is the Double-ladder shape, and the size of topping bar is little, and the size of getting out of a predicament or an embarrassing situation is large; The size of topping bar is matched in clearance with the material chamber on the material frame, fit clearance is 0.05 ~ 0.1mm, be processed with the through hole that some and moulding pin are matched in clearance on stock supporting plate, fit clearance is determined by the diameter of particle size, for 1/4 ~ 1/2 of average grain diameter, the upper surface of stock supporting plate processes the texture of various convex-concaves according to product needed.
Described porous ceramic plate mould, it is characterized in that: described moulding pin is the Double-ladder shape, larger for a fixing end size, the cross section of moulding pin is circle, square and hexagon etc., syringe needle is processed with rounding, to be reduced to form-drag, the length that the moulding pin stretches out its fixed part equals stock supporting plate thickness and product hole depth sum.
Described porous ceramic plate mould is characterized in that: described moulding pin fixed part is comprised of moulding pincushion plate and moulding pin fixed head, and moulding pin lower end is fixed in the hole of moulding pin fixed head; Moulding pin fixed head is positioned on moulding pincushion plate.
The forming method of described porous ceramic plate mould is characterized in that comprising the following steps:
(1) regulate the mould original state, hydraulic press drives patrix and rises to upper change point, regulate the upper surface laminating that stock supporting plate makes lower surface and the moulding pin fixed head of stock supporting plate, more than the moulding pin stretches out stock supporting plate through the pin hole on stock supporting plate, regulate and drive hydraulic cylinder drive material circle to move in the vertical direction, make stock supporting plate enter the material frame on the material circle; (2) reinforced, by advanced processing, good powder is scraped in the feed compartment of pan feeding frame; (3) compaction moulding, be advanced into the material frame under patrix, powder is carried out to compacting, after going downwards to lower-limit point, and pressurize 5 ~ 30s; (4) pickup, lift patrix and material circle, then by mould emptier, by guide pillar, will on stock supporting plate, be pushed away, and makes the moulding pin exit stock supporting plate, and now the preset space between the lower surface of the upper surface of stock supporting plate and material circle should facilitate pickup, takes out workpiece; (5) reset, make mould return to the described original state of step (1), complete a process-cycle.
The forming method of described porous ceramic plate mould is characterized in that: while regulating the mould original state, the height of the material frame that stock supporting plate enters is 3 ~ 5mm; Each reinforced height should be concordant with the top edge of material frame; During pickup, be first the moulding pin to be exited from stock supporting plate, then workpiece level from stock supporting plate is shifted out.
The forming method of described porous ceramic plate mould, it is characterized in that: the product thickness that described processes goes out is greater than the length that the moulding pin stretches into the material circle, what from mould, take out is the workpiece of blind hole, and it is carried out to grinding, processes final through hole product.
The utility model has following technical advantage:
1. what prepare that porous ceramic plate adopts due to the utility model is dry-pressing formed, and production equipment and technical process are simple, and production efficiency is high, and the briquetting pressure of product is large, and shrinkage factor is little.
2. because mould adopts Driven by Hydraulic Cylinder, mold actions is steady, in top board, material circle and the push pedal of mould, position sensor is installed, and makes the Stroke Control of mould accurate, and easily is automated production.
3. Design of Dies described in the utility model is reasonable, simple in structure, and maintenance and inspection are convenient, and stopping means is installed on cope match-plate pattern, make Mould operation safety, long service life.
4. the appearance and size as fruit product changes, as long as the punch of original mould, material frame and stock supporting plate are carried out to suitable adjustment, the quantity of increase and decrease moulding pin, just can meet the demands, and miscellaneous part can continue to use, and makes manufacturing again of mould more economical.
5. the upper surface of stock supporting plate can process the texture of different patterns, and the shape of cross section of moulding pin and length also can change, thereby can produce the product of different patterns.
6. four large guide pillars connect part of the upper die and part of the lower die from top to down, and guidance quality is good; Because the moulding pin also plays guide effect with coordinating of hole on stock supporting plate, make the precision of product higher again.
7. the product that mould described in the utility model is produced is blind hole, just need on punch, not process the moulding pin hole, has not only reduced the difficulty of centering, has also reduced the manufacturing cost of mould simultaneously.Certainly directly producing the through hole product also can realize.
The accompanying drawing explanation
Fig. 1 is the main semi-section structural representation of mould described in the utility model;
Fig. 2 is the part of the lower die top view of mould described in the utility model;
Fig. 3 is the structural representation of the stock supporting plate part of mould shown in Fig. 1;
Fig. 4 is the generalized section of the stock supporting plate part of mould shown in Fig. 1
Fig. 5 is the structural representation of the moulding pin part of mould shown in Fig. 1;
Fig. 6 is the top view of the moulding pin part of mould shown in Fig. 1;
Fig. 7 is the described mould of Fig. 1 position view during pickup in dry-pressing formed process;
Fig. 8 is the structure for amplifying schematic diagram at the A position of mould shown in Fig. 1;
Fig. 9 is the structural representation of the porous ceramic plate that uses Mould Machining described in the utility model to go out;
Figure 10 is the structural representation of the final products of actual needs;
1 base plate; 2 hydraulic cylinders; 3 support; 4 tailing axles; 5 knock-pins; 6 push pedals; 7 support fixed head; 8 moulding pincushion plates; 9 moulding pin fixed heads; 10 material circles; 11 cope match-plate patterns; 12 top boards; 13 position sensors; 14 punch; 15 material frames; 16 stopping means; 17 long guide pillars; 18 workpiece; 19 moulding pins; 20 stock supporting plates; 21 guide pillars; 22 jacking blocks.
The specific embodiment
Take and produce ganoid porous ceramic plate as example below in conjunction with accompanying drawing, the utility model is described further.
A kind of dry pressing molding mould of porous ceramic plate as depicted in figs. 1 and 2, comprise upper die and lower die two parts, wherein patrix is by being comprised of top board 12, cope match-plate pattern 11 and punch 14, and cope match-plate pattern and punch are fixedly connected sequentially from top to bottom and are integral and are fixed on by top board on the moving beam of hydraulic press; Counterdie comprises material circle 10, material frame 15, stock supporting plate 20, moulding pin 19 and fixed part thereof, mould emptier, hydraulic cylinder 2 and supports fixed head 7 and forms; Counterdie is fixed on workbench by base plate 1 and support 3; Upper die and lower die are connected by four long guide pillars 17, to guarantee the centering of patrix and counterdie.On material circle 10, a removable material frame 15 that height is 3 times of ceramic wafer product thicknesses is installed, the ,Liao Quan both sides, penetrating material chamber that have product length and width size on the material frame respectively connect a driving hydraulic cylinder 2 that specification is identical; Stock supporting plate is placed in below material circle, with the material frame, coordinates and forms feed compartment, and moulding pin 19 is fixed as the core of mould and by the moulding pin fixed part be arranged on below stock supporting plate through the hole of stock supporting plate; Stock supporting plate and moulding pin and fixed part thereof are positioned at and support the fixed head top; Mould emptier is comprised of jacking block 22, push pedal 6, knock-pin 5 and tailing axle 4, and jacking block is through the slotted eye supported on fixed head, and upper and lower end is connected with push pedal with stock supporting plate respectively, and push pedal is by four guide pillars, 21 guiding, and push pedal is connected with hydraulic press with tailing axle by knock-pin.
As shown in Figure 1, be symmetrically installed with four adjustable stopping means 16 on described cope match-plate pattern, prevent from when punch is descending making the bending of moulding pin or fracture, in the same side of top board 12, material circle 10 and push pedal 6, a position sensor respectively being installed, for the accurate control of mold stroke position.
As shown in Figure 3 and Figure 4, described stock supporting plate 20 is Double-ladder shapes, the size of topping bar is less, be matched in clearance with the material chamber of material circle, fit clearance is generally 0.05 ~ 0.1mm, is processed with the through hole that some and moulding pin are matched in clearance on stock supporting plate, and fit clearance is determined by the diameter of particle size, for 1/4 ~ 1/2 of average grain diameter, the upper surface of stock supporting plate is smooth surface according to product needed.
As shown in Figure 5 and Figure 6, described moulding pin 19 is the Double-ladder shape, the stiff end size is larger, cross section can be circle, square and hexagon etc., syringe needle is processed with rounding, to be reduced to form-drag, the length that the moulding pin stretches out its fixed part equals stock supporting plate thickness and product hole depth sum.
A kind of forming method that uses above-mentioned dry pressing molding mould to produce porous ceramic plate is characterized in that comprising the following steps:
(1) regulate the mould elemental height, hydraulic press drives patrix and rises to upper change point, regulate the upper surface laminating that the stock supporting plate height makes lower surface and the moulding pin fixed head of stock supporting plate, it is above and be less than the position of product thickness that the moulding pin stretches out stock supporting plate through the pin hole on stock supporting plate, regulate and drive hydraulic cylinder drive material circle to move in the vertical direction, make stock supporting plate enter the material frame on the material circle; (2) reinforced, by advanced processing, good powder is scraped in the feed compartment of pan feeding frame, and the powder addition is concordant with the top edge of material frame; (3) compaction moulding, be advanced into the material frame under patrix, powder is carried out to compacting, and after going downwards to lower-limit point, the position sensor that is arranged on part of the upper die is accepted position signalling, makes patrix stop moving downward, then pressurize 10s; (4) pickup, patrix and material circle are lifted, then by mould emptier, will on stock supporting plate, be pushed away, make the moulding pin exit stock supporting plate, now the preset space between the lower surface of the upper surface of stock supporting plate and material circle should facilitate pickup, then workpiece is taken out in translation, and the mold work position of this process is with reference to shown in Fig. 7; (5) reset, make mould return to the described initial position of step (1), complete a process-cycle.
The forming method of described porous ceramic plate mould is characterized in that: while regulating the mould elemental height, the height of the material frame that stock supporting plate enters is that h is 4mm, as shown in Figure 8; Each reinforced height should be concordant with the top edge of material frame; During pickup, be first the moulding pin to be exited from stock supporting plate, then workpiece level from stock supporting plate is shifted out.
The forming method of described porous ceramic plate mould, it is characterized in that: the product thickness that uses described processes to go out is greater than the length that the moulding pin stretches into the material circle, what from mould, take out is blind hole workpiece as shown in Figure 9, it is carried out to grinding, process through hole product as final as Figure 10.
Above content is in conjunction with concrete preferred embodiment, and the further description that the utility model is done can not assert that concrete enforcement of the present utility model is confined to these explanations; Without departing from the concept of the premise utility, can also make some deductions and replacement, all should be considered as belonging to the definite scope of patent protection of claims that the utility model is submitted to.