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JPH09141326A |
To provide a male die core and a female die capable of fully extending the life of bearing part, moreover generating no crack due to the effect of extruding pressure during extrusion, and furthermore extrusion is precisely executed. The ...
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JPH09136110A |
To prevent the tip of a mandrel from deflecting by preventing the stress applying the bending to the tip toward the center from being exerted on the tip of the mandrel. A flat elliptic opening part 9 corresponding to the outer periphery ...
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JP2609785B2 |
PURPOSE: To effectively cool a bearing hole and a material to be extruded by providing a bearing tip having a thickness corresponding to the length of the bearing hole and a flow path for a cooling medium between a tip supporting metalli...
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JP2609800B2 |
PURPOSE: To extrude the hollow stock of high dimensional precision not having uneven thickness, etc., and to reduce the die changing cost due to wear, etc. CONSTITUTION: The device is provided with a core 7, male die holder 8 and small f...
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JP2602403B2 |
PURPOSE: To extrude a high precision hollow material without uneven thickness. CONSTITUTION: A male die 2 is provided with an annular base part 7, bridge part 8 and forming projection part 9. Then, a female die 3 is engaged with the male...
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JP2602388B2 |
PURPOSE: To economically change a die when wear etc. is generated on a bear ing part by constituting an extruding die so as to be divided into a bearing chip and a holding die to hold it. CONSTITUTION: Since a backup die 32 of cemented c...
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JP2597923B2 |
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JPH0985333A |
To provide a die for extrusion excellent in oxidizing resistance and durability. A boron nitride film formed by the ion beam supported vapor deposition method is provided through a nitrided layer formed on the surface of a base material ...
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JPH0976009A |
To obtain a manufacturing method of attachment fittings for curtain walls which are used for skyscrapers having flexible structure. In this manufacturing method of metal fittings for fixing curtain walls, after the material which is work...
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JPH0970616A |
To provide a system and a method for controlling extrusion molding of variable cross section capable of easily controlling the shape to the length of a formed body with a simple equipment in parallel to extrusion of the formed body, and ...
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JPH0967663A |
To produce a die for extruding free from breaking at the time of extruding by forming a white layer and a nitrogen diffused layer of which thicknesses are specified. This die is the one in which a white layer having 4 to 8μm thickness i...
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JPH0966312A |
To maintain high surface quality of a metal hollow material at succeeding extrusion after completion of extrusion by storing a hollow die as shutting off state from atmosphere while a forming material remains as extruded/left in a hollow...
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JPH0957334A |
To perform an extrusion with an excellent shape stability by constituting a male die by providing a 2nd male die housing plural port holes distributively supply a billet metal uniformly to respective port holes of a 1st male die behind t...
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JP2582245B2 |
@ Metal-working dies which are typically made of steel are provided with substantially enhanced life by receiving a plasma-sprayed refractory metal coating which is subsequently compacted under conditions of minimum shear stress. The num...
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JPH0938718A |
To extrude an extruded material having stable and appropriate size and shape in the longitudinal direction by forming an air layer for heat insulation between a die and a die ring. This extrusion tool 1, is supported by a die slide 11 of...
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JP2579256B2 |
PURPOSE: To automatically, safely and efficiently change a dummy block by rotating a rotary fitting part with the dummy block on the side of a stem while the fixed dummy block is held with rotation locked. CONSTITUTION: When the fixed du...
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JP2579641B2 |
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JPH0924415A |
To obtain an extruded shape having good surface property in spite of repeating extrusion many times. In this die for extruding aluminum, a flow guide 6, die main body 1 and packer 7 are arranged along the extruding direction. A radius of...
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JPH0924416A |
To provide a method for measuring very precisely the bending amount of the end part of a mandrel for a long time and a method for extruding more tubes having excellent quality with the same mandrel. The bending amount of the end part 11 ...
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JPH0924414A |
To extrude an extruded material good in surface quality by making a bearing part uniform on the outlet side of the material and making a difference in accordance with the length difference of the bearing part on the inlet side of the mat...
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JPH0910826A |
PURPOSE: To provide a warm and hot extrusion die which can improve productivity, enhancing durability with suppressing the occurrence of a defective product. CONSTITUTION: An outer circumferential face of warm and hot extrusion die 11 is...
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JPH091231A |
PURPOSE: To provide an extrusion device which uniformizes heat by eliminating temp. difference at each part of a die generated during extruding and in this result, can obtain an extruded material having desired shape dimension. CONSTITUT...
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JPH091230A |
PURPOSE: To provide a die for hot extrusion which prevents dimensional variation of the formed gap caused by the thermal expansion around a bearing part at the time of extruding, and in this result, can obtain an extruded material having...
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JP2566491B2 |
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JP2564075B2 |
PURPOSE: To easily remove a cover member in exchanging a core and to surely prevent the positional deviation, falling off, etc., of the cover member during extrusion. CONSTITUTION: In a state with the core supported by a pin 7 to support...
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JP2563968B2 |
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JP2564091B2 |
PURPOSE: To hold a core at stable holding state, to efficiently execute core mounting work with saving manpower and to realize such holding mechanism in die manufacturing. CONSTITUTION: A male die is divided into a core 7 and male holder...
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JP2564088B2 |
PURPOSE: To mutually maintain a highly accurate alignment state by providing plural recessed parts for attaching a male die in opposition to plural forming holes on the rear end face of a female die in the extrusion direction, respective...
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JP2564069B2 |
PURPOSE: To easily produce and work a core, to relax stress concentration on a core supporting part and to improve strength reliability. CONSTITUTION: A supporting hole 16 is formed on the side of the core 12, a supporting pin 13 is pier...
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JP2564076B2 |
PURPOSE: To increase efficiency of exchange work of a bearing tip by exchanging the bearing tip smoothly without difficulty and exchanging the tip with a die for forming a welding chamber fixed. CONSTITUTION: A material circulation hole ...
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JP2559813B2 |
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JPH08300035A |
PURPOSE: To provide a die for hot extrusion such that the temperature difference is eliminated from each part of the die so as to attain ignition and that unstableness of the shape of an extruded material is prevented as well as a pressu...
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JPH08294718A |
PURPOSE: To finely produce a double layered tube, applicable to severe application environment of boiler, chemical plant, etc., in hot extruding so as not to generate defect of crack and scab, etc., to the outermost layer of difficultly ...
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JP2550384B2 |
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JPH08281320A |
PURPOSE: To improve wear resistance and seizure resistance of a die by forming carbide covered layer at the part, at which a die comes in contact with an Al alloy with a specific thickness. CONSTITUTION: A die is made of a carbon steel c...
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JPH08267121A |
PURPOSE: To realize a high speed extrusion, and to realize the improvement of the productivity of an extruded material without defects such as die line, gouge, etc. in a port hole die for the extrusion of a hollow material. CONSTITUTION:...
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JPH08267120A |
PURPOSE: To reduce friction resistance occurring when a base stock passes through a land, and to prevent the shear drop by a die of the land and the slip scratch of a product by forming a recessed part near a center in the axial directio...
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JPH08267123A |
To provide an extrusion die which is reduced in the difference of pressure generating between portholes and reduced in the difference between the speed of extrusion owing to the difference between shapes of individual products in a multi...
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JPH08257631A |
PURPOSE: To provide a step die for continuously extending plural products having arbitrary shape by one time of the extruding process. CONSTITUTION: In the step die 10 superposed with plural dies 11, 21 having different extruding shape, ...
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JPH08252627A |
PURPOSE: To obtain a die for variable cross section extrusion and the extrusion method using it by which construction of travel mechanism and guide mechanism is simplified and various cross section shapes are formed. CONSTITUTION: The di...
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JP2512104Y2 |
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JPH08243632A |
PURPOSE: To adjust the maximum width dimension in the direction across the direction of the relative movement of first and second dies in a die for extrusion of variable section where the overlapped part of opening of the first and secon...
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JP2535025B2 |
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JP2535039B2 |
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JP2530501B2 |
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JP2531863B2 |
PURPOSE: To obtain a die for extrusion processing with which a precision material to be formed that requires high precision such as cylinder parts are extruded with high accuracy. CONSTITUTION: After a temporary working die 2 is made whi...
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JP2530331B2 |
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JP2528156B2 |
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JP2507947Y2 |
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JP2524037B2 |
PURPOSE: To manufacture a pipe with fins in the inner surface having high dimensional accuracy without any recessed defect and protruding defect. CONSTITUTION: By using a mandrel, in which a part faced to a fin forming part in a die is c...
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