CN201941073U - Moulding water absorption punch for wet press magnetic field of permanent magnetic ferrite - Google Patents
Moulding water absorption punch for wet press magnetic field of permanent magnetic ferrite Download PDFInfo
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- CN201941073U CN201941073U CN2010205371857U CN201020537185U CN201941073U CN 201941073 U CN201941073 U CN 201941073U CN 2010205371857 U CN2010205371857 U CN 2010205371857U CN 201020537185 U CN201020537185 U CN 201020537185U CN 201941073 U CN201941073 U CN 201941073U
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- punch
- water absorption
- pure iron
- magnetic field
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Abstract
The utility model discloses a moulding water absorption punch for the wet press magnetic field of a permanent magnetic ferrite, which comprises a punch. The lower matrix of the punch is a pure iron. A rectangular groove is arranged between the punch and the pure iron of the lower matrix. A plurality of horizontal water absorption channels are arranged inside the rectangular groove. The pure iron of the lower matrix is equipped with a main water absorption channel and the horizontal water absorption channels communicate with the main water absorption channel. The top of the punch is arc-shaped and the upper end of the punch is equipped with a vertical water absorption hole. A water absorption groove is provided vertical to the arc-shaped direction. The water absorption groove communicates with the vertical water absorption hole and the vertical water absorption hole communicates with the horizontal water absorption channels. The punch of the utility model is simple in structure and the drainage of all the parts of a magnetic tile green compact tends to be consistent by utilizing the punch, thus is beneficial to the density uniformity during the compacting process of green compacts. Meanwhile, the difficulty in the moulding of large-radian thick products is overcome.
Description
Technical field
The utility model mainly is a kind of permanent ferrite magnetic tile wet pressing pressing under magnetic field suction punch.
Background technology
The main component of permanent ferrite magnetic tile is an iron oxide, its manufacture process is: the iron oxide that will be mixed with certain water with wet ball mill is ground to the slip of 0.75-1.2 micron, through the precipitator tower post precipitation, make its water content be controlled at 37% slip, the material feeding pump injects concave die cavity with slip, under the effect by hydraulic press and magnetic field, the slip particle is orientated on one side, on one side by last water sucting plate and lower punch draining simultaneously, form green compact, through high temperature sintering, mill processing grinds into finished product with the product behind the sintering again.
Two-sided suction mould is made up of last water sucting plate, die, following suction punch, and two-sided suction mould is generally the magnetic shoe finished product thickness greater than the product more than the 15mm.At present known suction punch suction down hole evenly distributes, and following suction convex mould surface has arc and both sides platform to constitute, and does not have pick trough conducting suction hole.Find out to arc top vertical direction compression ratio change procedure from magnetic shoe green compact arc two sides part; Green compact two sides compression ratio maximum to punch platform carries out the transition to circular arc place compression ratio minimum and increases gradually to arc top compression ratio, so magnetic shoe green compact arc two sides part should be mutually to arc top vertical direction green density change procedure: green compact two sides partial density maximum density gradually is reduced to punch platform transition orthodrome place and increases gradually to arc top density.The difference that produces of magnetic shoe green compact each several part density like this, density variation is excessive, and green compact arc two sides and arc top will crack when green compact stress was greater than the adhesion of green compact inside when the press demoulding, were commonly called as the edge of a knife and split and directly split.
The utility model content
Technical problem to be solved in the utility model provides a kind of permanent ferrite magnetic tile wet pressing pressing under magnetic field suction punch, it is simple and reasonable, each the position draining of magnetic shoe green compact is reached unanimity, help density in the green compact pressing process evenly, solved and produced the shortcoming that big radian and thicker product are difficult to moulding.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of permanent ferrite magnetic tile wet pressing pressing under magnetic field suction punch, include punch, the lower substrate of punch is a pure iron, have rectangular channel between punch and the lower substrate pure iron, a plurality of horizontal water absorption channel are arranged in the rectangular channel, have main water absorption channel in the described lower substrate pure iron, described horizontal water absorption channel is connected with main water absorption channel; Described punch top is circular-arc, and the upper end of described punch has vertical suction hole, is having pick trough perpendicular to arcuate directions, and described pick trough is connected with the hole that vertically absorbs water, and the hole that vertically absorbs water is connected with horizontal water absorption channel.
Described vertical suction hole is reduced to sloping platform face and arc top direction respectively gradually by the transition angle; Pick trough is clipped to sloping platform face and arc top direction successively from deep to shallow from transition angle branch.
The utility model especially at magnetic shoe radian center subtended angle greater than 130 °, the magnetic shoe finished product thickness is greater than the structural improvement of the above permanent ferrite magnetic tile wet pressing of 15mm pressing under magnetic field suction punch.
It is downward-sloping 10 ° of-30 ° of formation sloping platform faces of basic point that the utility model punch both sides flat surface carries out the transition to the orthodrome place, carries out the transition to the transition angle that the orthodrome place forms R1-R30 at the sloping platform face, and the upper end is tangent with the transition angle behind the platform inclination.The downward-sloping density that reduces punch arc two sides relatively of punch flat surface; Knuckle also increases the density that the sloping platform face carries out the transition to the orthodrome place relatively.
Because the magnetic shoe product is a watt shape, causes magnetic shoe green compact each several part density difference, the density in the hole that vertically absorbs water decides according to the density of magnetic shoe green compact each several part; Perpendicular to be beneficial to absorb water the conducting between the hole of the pick trough of arcuate directions, can improve the uniformity of magnetic shoe green compact each several part density.
The utility model is equipped with rubber seal on the rectangular channel in use, and sealing ring can prevent the leakage material of die slip, can guarantee that also the moisture content of punch flows out from main water absorption channel.Because vertically absorb water hole and horizontal water absorption channel are communicated with, therefore under the extruding and magnetic field effect of hydraulic press, the moisture content of slip is discharged simultaneously by punch and last water sucting plate in the concave die cavity in addition.After the density of magnetic shoe green compact reaches 3.2 gram/cubic centimetres, oppositely magnetize in magnetic field, takes out the magnetic shoe green compact after the demoulding.
The utility model has the advantages that:
The utility model is simple and reasonable, and each the position draining of magnetic shoe green compact is reached unanimity, help density in the green compact pressing process evenly, solved and produced the shortcoming that big radian and thicker product are difficult to moulding.
Fig. 1 is the broken section structural representation of the utility model front view.
Fig. 2 is a plan structure schematic diagram of the present utility model.
The specific embodiment
Referring to Fig. 1,2, a kind of permanent ferrite magnetic tile wet pressing pressing under magnetic field suction punch, include punch, the lower substrate of punch is a pure iron 4, have rectangular channel 9 between punch and the lower substrate pure iron 4, a plurality of horizontal water absorption channel 10 are arranged in the rectangular channel 9, have main water absorption channel 8 in the described lower substrate pure iron 4, described horizontal water absorption channel 10 is connected with main water absorption channel 8; It is circular-arc 6 that described punch top is, and the upper end of described punch has vertical suction hole 2, is having pick trough 3 perpendicular to arcuate directions, and described pick trough 3 is connected with vertical suction hole 2, and the hole 2 that vertically absorbs water is connected with horizontal water absorption channel 10.Carrying out the transition to circular arc 6 places with the platform of punch both sides is that the downward-sloping certain angle of basic point forms sloping platform face 7, and the sloping platform face carries out the transition to the circular arc place and is formed with transition angle 1; Described arch section, sloping platform face and place, transition angle stud with weak permeability magnetic material 5.
Claims (2)
1. permanent ferrite magnetic tile wet pressing pressing under magnetic field suction punch, include punch, the lower substrate of punch is a pure iron, it is characterized in that: have rectangular channel between described punch and the lower substrate pure iron, a plurality of horizontal water absorption channel are arranged in the rectangular channel, have main water absorption channel in the described lower substrate pure iron, described horizontal water absorption channel is connected with main water absorption channel; Described punch top is circular-arc, and the upper end of punch has vertical suction hole, is having pick trough perpendicular to arcuate directions, and described pick trough is connected with the hole that vertically absorbs water, and the hole that vertically absorbs water is connected with horizontal water absorption channel.
2. a kind of permanent ferrite magnetic tile wet pressing pressing under magnetic field suction punch according to claim 1, it is characterized in that: described vertical suction hole is reduced to sloping platform face and arc top direction respectively gradually by the transition angle; Pick trough is clipped to sloping platform face and arc top direction successively from deep to shallow from transition angle branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205371857U CN201941073U (en) | 2010-09-19 | 2010-09-19 | Moulding water absorption punch for wet press magnetic field of permanent magnetic ferrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205371857U CN201941073U (en) | 2010-09-19 | 2010-09-19 | Moulding water absorption punch for wet press magnetic field of permanent magnetic ferrite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201941073U true CN201941073U (en) | 2011-08-24 |
Family
ID=44468424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205371857U Expired - Lifetime CN201941073U (en) | 2010-09-19 | 2010-09-19 | Moulding water absorption punch for wet press magnetic field of permanent magnetic ferrite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201941073U (en) |
-
2010
- 2010-09-19 CN CN2010205371857U patent/CN201941073U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |
|
| CX01 | Expiry of patent term |