CN201816125U

CN201816125U - Die limiting surface magnetic variation between two sides of permanent magnetic ferrite square within 50 Gauss

Info

Publication number: CN201816125U
Application number: CN201020563106XU
Authority: CN
Inventors: 余道德
Original assignee: SINOMAG TECHNOLOGY Co Ltd
Current assignee: SINOMAG TECHNOLOGY Co Ltd
Priority date: 2010-10-15
Filing date: 2010-10-15
Publication date: 2011-05-04
Anticipated expiration: 2020-10-15

Abstract

The utility model relates to a die limiting surface magnetic variation between two sides of a permanent magnetic ferrite square within 50 Gauss. The die comprises an upper die, a middle die and a lower die, and is characterized in that a hole cavity matched with a die cavity of the middle die is formed on a substrate of the upper die, an iron core block is embedded in the hole cavity by interference fit, and corresponding surfaces of the iron core block and the lower male die constitute a working plane of the upper die. The substrate of the upper die is made of a non-magnetic conducting material, and the iron core block is made of an industrial pure iron with strong magnetic conductivity. As the surface magnetic variation between the two sides of the ferrite square is reduced for solving the difference between surface magnetism on the two sides of the ferrite square, the upper die of the die can improve the overall performances of a magnetic separator and other equipment.

Description

A kind of permanent-magnet ferrite square two sides table magnetic variation is less than 50 Gausses' mould

Technical field

The utility model relates to a kind of mould, exactly is the mould of a kind of permanent-magnet ferrite square two sides table magnetic variation less than 50 Gausses.

Technical background

The mould of present known preparation permanent-magnet ferrite square, what patrix was used is permeability magnetic material 45# steel, and middle mould is to use non-magnetic Hardmetal materials, and lower punch is with permeability magnetic material Cr12 or 45# steel.When official written reply is produced, the ferrite slurry that mill is good injects in the closed die cavity of being made up of patrix, mould and lower punch, simultaneously that middle mould is outer line bag energising produces the alignment magnetic field that connects die cavity, then press work patrix is descending, will progressively be pressed into the qualified blank with definite shape along the ferrite particle that the alignment magnetic field direction is vertically arranged.

Under existing mould structure, the alignment magnetic field that line bag energising back produces can exist than big-difference at the different parts of die cavity, and is little by the density of line of magnetic force at patrix place, is divergent shape, and the degree of orientation is low; The magnetic line of force by the counterdie place is close, is to be arranged in parallel degree of orientation height.The table magnetic that causes die face on the base substrate is generally more than the low 200Gs of table magnetic than lower die face, and the therefore difference that exists because of magnet two sides table magnetic when assembling of equipment such as picture magnetic separator causes the overall performance of equipment such as magnetic separator to descend the uniformity variation.

The utility model content

The purpose of this utility model is to provide a kind of to people to solve the difference that exists between the table magnetic of ferrite square two sides by reducing ferrite square two sides table magnetic variation, thereby the permanent-magnet ferrite square two sides table magnetic variation of the overall performance of equipment such as raising magnetic separator is less than 50 Gausses' mould.

The utility model comprises patrix, middle mould and counterdie, it is characterized in that: offer the vestibule that is complementary with middle mould die cavity on the patrix matrix, be inlaid with the iron core piece by interference fit in the vestibule, iron core piece and lower punch corresponding surface are formed the patrix working face.

Described patrix matrix adopting non-magnet_conductible material is a material, and it is the matter material that the iron core piece adopts strong magnetic conduction ingot iron.

The effect of utility model

The utility model is owing to offer the vestibule that is complementary with middle mould die cavity on the patrix matrix; be inlaid with the iron core piece by interference fit in the vestibule; iron core piece and lower punch corresponding surface are formed the patrix working face; patrix matrix adopting non-magnet_conductible material is a material; it is the matter material that the iron core piece adopts strong magnetic conduction ingot iron, so the ferrite square is when moulding, by the magnetic field of line packet generation; its magnetic line of force through base substrate, enters the strong permeability magnetic material of patrix that is complementary with middle mould die cavity from the mould lower punch again.The magnetic line of force all is enclosed in the interface of pure iron pellet like this, needed magnetic field is vertical, parallel and even when making base substrate patrix place orientation, avoid the magnetic line of force just to be divergent shape, magnetic flux density and to descend not reaching base substrate patrix interface, so that the degree of orientation of die face weakens on the base substrate, and die face table magnetic also descends thereupon on the magnetic.By the permanent magnetism square that this mould is produced, the table magnetic variation value on its two sides can be reduced to less than 50 Gausses by original greater than 200 Gausses, thereby improves the overall performance of equipment such as magnetic separator.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is a ferrite square die structure dwg.

Magnetic line of force distribution schematic diagram when Fig. 4 is the utility model mould molding.

The specific embodiment

Embodiment 1:

Referring to Fig. 1～2; the utility model comprises patrix, middle mould and counterdie; offer the vestibule 2 that is complementary with middle mould die cavity on the patrix matrix 1 of employing non-magnet_conductible material; be inlaid with the iron core piece 3 of strong magnetic conduction ingot iron in the vestibule by interference fit, iron core piece and lower punch corresponding surface are formed patrix working face 4.

When processing is used; referring to Fig. 3; at first according in the size of mould 5; make not magnetic conduction patrix matrix 1; again according in cavity quantity, position and the size of mould 5; in the position of patrix matrix 1 correspondence, on patrix matrix 1, cut out vestibule 2 with the corresponding quantity of middle mould 5 each die cavity, position and size with electro-spark cutting machine.Do iron core piece 3 with strong magnetic conduction ingot iron material, iron core piece 3 and vestibule 2 interference fit, the magnitude of interference is that (the interference fit weight range is 0.05～0.15mm) to 0.1mm, and patrix matrix 1 is heated to 400～500 ℃, matches with 2 interference of iron core piece.The patrix that to inlay again behind the iron core piece is processed with the work flow of common patrix, makes patrix through flat stone mill, after beating procedure of processing such as the hole that absorbs water.

When ready-made patrix and middle mould are used, make patrix iron core piece 3 over against middle mould die cavity position.For ease of upper and lower mould location, beat pin hole 6 at opposite side, upper and lower mould can accurately be proofreaied and correct when making on the mould machine.

Referring to Fig. 4; because patrix matrix 1 is a non-magnet_conductible material; the iron core piece 3 that inlay the centre is strong permeability magnetic material; and it is just corresponding to die cavity and position with it; shape; sizes etc. are all identical; magnet 7 is when moulding; the magnetic line of force 8 that external magnetic field produces can only enter in the strong conducting magnet core piece 2 of patrix through base substrate by lower punch 9; because of the patrix matrix of iron core piece outside is a non-magnet_conductible material; magnetic field there is very strong shielding action; so the magnetic line of force can not be divergent state because of leakage field through base substrate during to the iron core piece; guarantee alignment magnetic field equal and opposite in direction that die face and lower die face on base substrate is in forming process are suffered and evenly; thereby make that the table magnetic on square two sides is basic identical, difference is in 50 Gausses.

Claims

1. the mould of magnetic variation less than 50 Gausses shown on a permanent-magnet ferrite square two sides; comprise patrix, middle mould and counterdie; it is characterized in that: offer the vestibule that is complementary with middle mould die cavity on the patrix matrix; be inlaid with the iron core piece by interference fit in the vestibule, iron core piece and lower punch corresponding surface are formed the patrix working face.

2. permanent-magnet ferrite square according to claim 1 two sides table magnetic variation is less than 50 Gausses' mould, and it is characterized in that: described patrix matrix adopting non-magnet_conductible material is a material, and it is the matter material that the iron core piece adopts strong magnetic conduction ingot iron.