Mold to the press
(57) Abstract:Usage: structural elements of presses for the manufacture of thin flat parts. The inventive mold to the press contains punches and matrixes, located in the clamps, the upper and lower plates connected to the pressure and the support legs interconnected with the bottom plate. Legs made in the form set vertically installed on the desktop press their bottom ends of thin-walled tubes. Their upper ends are located over the entire area of the bottom gorizontalnoi surface of the bottom plate. Pipe length is chosen equal to the difference of the stroke of the press slide and the mold height in operating position from the lower horizontal surface of the bottom plate to the upper horizontal surface of the upper plate. 2 Il. The invention relates to structural elements of presses, in particular for a press-forms and can be used in the manufacture of plastics or rubbers thin flat parts on large presses with large dimensions of the table and a large stroke of the RAM.Known mold containing a matrix and a punch, a basic element for the matrix and node removal of finished products  it oporn low performance, and through the groove and the slot in the support element can lead to deformation of the mold during its operation.Known mold to the press containing the punches and matrixes, located in magazines, respectively punches and matrices, upper and lower plates connected with the press, and the support legs interconnected with the bottom plate  In the mold supporting rack is made in the form of rods that are installed on the bottom plate at the ends of the racks are placed in curly holes ring mounted rotatably in the top plate. Racks are located at the edges of the bottom plate. The weight of the upper plate is divided into two hours. By functionality (pressing) and the most common elements (punches, matrices, cage punches and matrices, upper and lower plates, racks interconnected with the bottom plate). Specified mold is selected as the nearest equivalent.In the famous moulds for presses not provided a uniform distribution of force pressing on the mold while pressing a few thin flat parts one press-form on large presses with a large stroke of the RAM that causes deformation of the mold the weight of the mold is complicated its Assembly and disassembly. For example, in the manufacture of parts for oil hydraulic press model DE force 630 tons with dimensions desktop h mm and stroke of the slide (closed height) 800 mm bench press form has such great weight that it cannot be installed on a press without the use of multi-ton cranes. When this mold, with only two legs interconnected with the bottom plate during operation will be deformed, and in the case of plates heating and hot pressing due to uneven distribution of force pressing on the mold, this deformation will lead to a significant reduction in the quality of the parts being manufactured.The purpose of the invention is the provision of a uniform distribution of force pressing on the mold, reducing deformation of the mold, while simultaneously pressing multiple thin flat parts, one press-form on large presses with a large stroke of the RAM, simplifying Assembly and disassembly of the mold in the press.The objective is ensured by the fact that in the mold to the press containing the punches and matrixes, located in magazines, respectively punches and matrices, upper and lower plates connected with the press, and imaamah on your desktop and press their bottom ends of thin-walled tubes, the upper ends of which are located over the entire area of the bottom horizontal surface of the bottom plate, the length of thin-walled tubes is selected equal to the difference of the stroke of the press slide and the height of the mold in its working position from the lower horizontal surface of the bottom plate to the upper horizontal surface of the upper plate.In the proposed device the mold pressing force generated between the slider and a work Desk press, is transmitted by a set of thin-walled pipes and evenly distributed over the entire area of the bottom plate of the mold, and through it on the manufactured parts. The cross section of the pipe (thickness, shape and size) is selected from the conditions for the transfer of tonnage without deformation of the pipe, which virtually eliminates deformation of the mold and improves the quality of manufacturing a thin flat parts with simultaneous pressing of multiple parts, one the mold during its long-term operation. In addition, this dramatically reduces the weight of the mold and simplifies the Assembly and disassembly of the mold in the press, as each thin-walled pipe is negligible (compared to the reception of a solid metal weight and the entire set of pipes can be easily fitted"ptx2">In Fig. 1 shows a General view of the mold of Fig.2 a cross section through the set of thin-walled pipes.Mold (Fig.1) contains the punches 1 and matrix 2, located respectively in the holder of the punches 3 and the yoke 4 matrices. In the manufacture of parts made of plastics or rubber mold includes plate heat 5 and 6, having a pipe which circulates teplopodvodyaschey agent, for example, hot steam. During cold pressing flat thin-walled parts of legkodeformiruemyh metals or alloys plate heat no. The mold includes an upper plate 7 and the bottom plate 8 connected to the pressure. Fixation of the upper and lower parts of the mold is column 9, secured in the holder of the punches 3, and the sleeves 10, secured in the holder of the matrix 4. Mold also includes support columns 11, interconnected with the bottom plate 8.The support legs (Fig.2) is made in the form of a set of vertically mounted on the desktop press their bottom ends of thin-walled tubes. The upper ends of thin-walled pipes are located over the entire area of the bottom horizontal surface of the bottom plate. The length of thin-walled pipes H1selected equal to the difference of the stroke X of the press slide and the height ol ostalnoe surface of the upper plate. The thickness, shape and size in cross section thin-walled pipes selected from the conditions for the transfer of tonnage on the bottom plate of the mold without deformation of thin-walled tubes. The total working area of the cross-section of a set of thin-walled tubes is approximately equal to the working area of the bottom plate 8.The upper part of the mold (clip 3 with the punches 1, the plate heater 5 and the upper plate 7) is attached to the press slide (traverse) by means of bolts 12, the threaded part of which is passed through the hole of the holder 3 punches.The lower part of the mold (clip 4 by 2 matrices, stove heater 6, the bottom plate 8) is mounted on a set of thin-walled pipes 11 and is fastened to the desktop press the bolts 13, the threaded part of which passed through the holes of the cage 4 matrices. Each matrix has designed the cavity 14 for placement of the product.Mold is as follows.In the manufacture of products from plastics or rubber mold is heated to a process temperature, feeding teplopodvodyaschey agent, for example, hot steam, plate heat 5 and 6. The mold is open, the load in each of the main cavity (socket) 14 matrix 2 a portion of compressible material, NEs form open and remove the finished product.In accordance with the proposed device company "KARMA" is developed and tested with positive results mold for manufacturing a thin flat rubber parts for type "Pad" height 5-8 mm oil hydraulic press model DA with force 630 t and move the slider to 800 mm, and oil hydraulic press model DG-2434 progress slider 550 mm and a force of 250 tonsThe height of the mold H2(one-story) from the lower horizontal surface of the bottom plate to the upper horizontal surface of the upper plate is 250 mm, the rack is made in the form of a set of thin (2-3 mm thick) round tubes with a length of 550 mm for the abs model DA and a length of 300 mm for the abs model DG-2434.The test molds arranged by "KARMA", confirmed the achievement of the technical result is specified in the description of the invention of providing a uniform distribution of force pressing on the mold, is practically eliminated deformation of the mold while pressing a thin flat parts, one press-form on large presses with a large stroke of the RAM, simplifying Assembly and disassembly of the mold on the press (provide Assembly and disassembly without special powerful GUI operation of the mold. Mold TO the PRESS containing the punches and matrixes, located in magazines, respectively punches and matrices of the upper and lower plates connected with the press, and the support legs interconnected with the bottom plate, characterized in that the supporting rack is made in the form of a set of vertically mounted on the desktop press the lower ends of thin-walled tubes, the upper ends of which are located over the entire area of the bottom horizontal surface of the bottom plate, the length of thin-walled tubes is selected equal to the difference of the stroke of the press slide and the height of the mold in its working position from the lower horizontal surface of the bottom plate to the upper horizontal surface of the upper plate.
FIELD: powder metallurgy, namely apparatuses for pressing powders.
SUBSTANCE: apparatus includes movable and stationary plates, upper and lower punches, pressing block in which die is arranged. Pressing block has two part; upper of said two parts is secured to movable plate and lower part is secured to stationary plate. In one part of block there is additional drive unit for moving punch in plane normal relative to motion direction of movable plate. Pressing block is provided with two carriages placed in guides with possibility of motion in two mutually normal directions. One carriage is arranged in guides of second carriage. Each part of pressing block has four profiled supports. Die is in the form of four shaping members with flat working surfaces. Said members are mounted on profiled supports in such a way that their working surfaces form closed loop. Each member has slit guide normal relative to its working surface and stem mounted in slit guide of adjacent member. Working surface of shaping member coincides with one surface of its stem.
EFFECT: increased density of pressed blanks, enhanced uniformness of density distribution in volume of blank.
2 cl, 4 dwg
FIELD: plastic working.
SUBSTANCE: the invention is pertaining to the field of plastic working, in particular, to constructions of the press molds and may be used for non-ferrous metals sward briquetting. The press mold contains a punch and a negative mould. The negative mould consists of two parts: the upper part and the. The lower part of the negative mould is made in the form of single-band hyperboloid of rotation. The diameter of the equator of the hyperboloid is equal to the diameter of the upper cylindrical part of the negative mould. The ratio of the diameter of the throat opening to the diameter of the equator makes 0.9-0. 95. In the result the invention ensures decreased friction and increased service life of the press mold.
EFFECT: the invention ensures decreased friction and increased service life of the press mold.
FIELD: plastic metal working, namely manufacture of elongated hollow-shaped parts.
SUBSTANCE: method comprises steps of forming flat blank of wire pieces in the form of tensioned helices; coiling blank to coil; placing blank coil in press-mold for pressing it by several transitions; at each transition performing pressing at least in three directions normal relative to symmetry axis of blank. After making part in the form of body of revolution, it is pressed in each next transition except last one at effort exceeding pressing effort of previous transition. After each transition blank being body of revolution with three protrusions on outer surface is formed. At next transitions beginning from second one, said protrusions are removed. In order to make part in the form of polygon, at first blank in the form body of revolution having three protrusions in outer surface is formed. At last transition part in the form of polygon is formed. Method is realized with use of press-mold having casing with rod mounted in it and punches movable in direction normal relative to rod symmetry axis. Contour of working end of each punch depends upon part to be made.
EFFECT: enlarged assortment of made parts, enhanced efficiency of method.
6 cl, 4 dwg, 1 ex
FIELD: powder metallurgy, namely processes for pressing elongated complex-shape articles, possibly in machine engineering.
SUBSTANCE: method is used for pressing elongated articles of powder in press-molds with die having horizontal parting. Method comprises steps of pouring powder to lower part of die, drawing together upper and lower parts of shaping die; shifting powder by moving lower punch to upper part of die and pressing it. At extraction article from press-mold its upper part is released due to opening upper part of die along one or several planes passing along (or parallel to) vertical and(or) inclined axis of upper part of pressed article. Simultaneously upper and lower parts of press-mold are opened along horizontal parting plane.
EFFECT: enhanced quality of article, enlarged manufacturing possibility at making complex-shape articles.
3 cl, 3 dwg
FIELD: powder metallurgy, namely processes for hot pressing of parts with inner cavities, mainly of powders of refractory ceramic materials.
SUBSTANCE: method comprises steps of shaping blank; placing it in die of graphite press-mold; forming layer of separation material between blank and shaping members of press-mold; hot pressing of blank; after termination of hot pressing fixing part in cavity of die and releasing punches at temperature of hot pressing. Graphite press-mold includes heater in the form of yoke having bandage ring of high-strength carbon composition material. Upper punch is mechanically joined with holder and it is mounted with possibility of fixation in limit upper position. Lower punch and die are mounted with possibility of mutual motion.
EFFECT: enhanced quality of parts.
4 cl, 1 dwg, 1 ex
FIELD: powder metallurgy, namely methods for pressing powder material at presence of liquid.
SUBSTANCE: method for pressing powder material comprises steps of introducing to powder volatile liquid and pressing powder; supplying liquid at side of pressing punch in quantity consisting of 2 - 3 volumes of pores of pressed blank. It is possible to perform pressing at simultaneous supply of liquid till termination of process. Method allows press non-plastic powders without plasticizer, partially remove plasticizer and perform impregnation. Press-mold includes die with upper portion having inner cavity, cavity for liquid and outer part. Apparatus for feeding liquid is in the form of cylinder with symmetrical through openings in walls and it includes piston for supplying liquid to inner cavity of die.
EFFECT: improved quality of articles.
7 cl, 11 dwg, 1 tbl, 8 ex
FIELD: powder metallurgy, namely molding methods and apparatuses.
SUBSTANCE: method comprises steps of heating and compacting powder material in pressing chamber restricted by molding frame and two movable punches. Each punch has at least two mutually insulated electrically conducting surfaces contacting with material at compaction. Voltage is fed at least to one contact surface of each punch for creating ohmic heat in compacted material. Apparatus for performing the method includes at least two separate voltage and(or) current sources; each source is connected with one contact surface.
EFFECT: shortened time period of manufacturing cycle.
13 cl, 1 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention relates to monoblock moulds for manufacture of articles from powder material and it can be used in multiposition presses. Proposed mould has body, floating die, charging plate and pressing and out punches. According to invention, body has lower and upper support and intermediate plates interconnected by posts. Lower support plate is connected with posts for axial displacement. Each post is provided with bead arranged over lower support plate. Shock absorbers are installed between beads of posts and lower support plate.
EFFECT: simplified design of mould, reduced labor input in servicing the mould and press as a whole.
6 cl, 4 dwg
FIELD: electric metallurgy, possibly manufacture of consumable electrodes for melting highly reactive metals and alloys, particularly for melting ingots of titanium and it alloys.
SUBSTANCE: tool includes body fixed to ram and having cone like protrusion coaxially formed at side of working end and supporting movable sleeve having cone opening and working surface. Inner surface of movable sleeve is provided in addition with cylindrical portion supporting members for restricting axial motion of sleeve. There is step between cylindrical and cone surfaces of movable sleeve. Working surfaces of cone protrusion and of movable sleeve are shaped ones. When movable sleeve is in its upper limit position said working surfaces are adjoined one to other. It provides elimination of gaps between pressure pad and die at working stroke of press.
EFFECT: lowered efforts for removing pressure pad out of die, uniform specific pressure at pressing between outer layers and mean part of electrode.
FIELD: powder metallurgy, namely processes for semi-continuous pressing of consumable electrodes and die for making such electrodes.
SUBSTANCE: method comprises steps of pouring charge into cylinder-cone die by dozes and pressing each doze of charge with use of pressure plate having dents and indentations; preliminarily compacting charge particles in cylindrical inlet portion of die by main effort of pressure plate and shifting them along circumference direction. At final compaction of charge in cone part of die particles are shifted in addition along radius successively in several directions. On cylindrical inlet part of die helical profiled grooves are formed; said grooves have lead angle less than friction angle. On cone squeezing part there are annular portions with variable conicity degree successively turned one relative to other.
EFFECT: production of high-strength electrode.
3 cl, 1 dwg