CN104415591A - Multi-layer metal sintering felt filtering disc - Google Patents

Abstract

The invention relates to the industry of making of various plastic films, and particularly relates to a filtering material of an integrated multi-layer metal sintering felt filtering disc, which is applicable to high temperature resistant, high pressure resistant and high viscosity polymer melts and is high in permeability, low in resistance and high in dust holding rate. In order to meet production requirements of ultrathin and high-definition plastic films, original metal net filtering cannot meet the requirement on high filtering precision for a long time. A metal sintering felt filtering material with characteristics of high temperature resistance, high filtering precision, high dust holding rate and low resistance is widely accepted, and in order to meet the requirements of actual production application, further deep development of metal filter materials with multiple layers of different structures seems very important. Since all composition materials of the filtering disc is stainless steel, a used filtering disc can be melted to be reduced to stainless steel.

Description

Filter dish crossed by multilayer metal sintering felt

Technical field

The present invention relates to high temperature resistant, high pressure, high-viscosity polymer melt high transmission, the integrated, multi-level metal sintering that lower resistance and Gao Rongchen lead crosses filter dish.

Background technology

Along with fine definition plastic sheeting need of production, metal mesh filter in the past cannot meet the needs of high filtering precision already.Metal sintering felt, with high temperature resistant, high filtering precision, high appearance dirt efficiency and lower resistance are that the filtering material of characteristic is extensively attracted attention, simultaneously in order to the needs of applicable production application, the metal filtrate of in-depth exploitation high accuracy multilayer different structure just seems very important further.

The existing filter dish excessively that Japan develops, with two-sided pair of net sintering felt for main filtration material, centre adds stamping forming concave-convex surface gripper shoe, between concavo-convex gripper shoe and filter material, put into punched-plate again simultaneously, implant the compressive sealed ring having aperture inside middle circle bore portion again, the complicated structure that last outer rim carries out welding forms.The filter dish product of crossing of this high price is applicable to repeatedly clean utilization, but the impurity being deposited on the inside is difficult to clean up.

This patent is considered and is thoroughly improved existing filter dish structure of crossing, thus Development and Production goes out anti-stress by force, high temperature resistant and lower resistance multilayer composite filter material, and after making single use, filter dish crossed by recuperable multilayer metal sintering felt simultaneously.

Summary of the invention

Cross the filter element (Fig. 6) that filter dish is made up of filtering material A and backing material B, the requirement of passage gaps of necessity and the intensity of fid during in order to meet high-pressure filteration, the wire diameter of its backing material is 0.82mm.

Backing material part, wire bent projection and bending C part can cause larger local pressure (Fig. 3), when sintering first by metal net surface passivation, increasing the contact area with filter felt, then carrying out integral sintered.

In addition, except main filtering medium metal felt, middle support and filter liquide are the keys of filter lower resistance high flow capacity by the gap of part, adopt the backing material of double helix mesh grid or special shape, make it to ensure that liquid being filtered can be passed through in graticule intermediate space.

But in order to increase the intensity of support section, can increase the line number of mesh grid graticule, increase line number and the passage gaps of liquid can be made to reduce, filtering full-bodied polymer cannot pass through.

In addition, in order to increase flow pass gap adjustment P1 and P2 spacing (Fig. 3), reducing graticule line number and circulation gap can be made to increase, but the strong point supporting filter material is reduced, filter felt surface pressure can be caused to increase, and point branch causes distortion infringement to filter surface.

Structure in the past makes the dregs of a large amount of cake filtration of meeting in fid to clean.Even also having residual dregs after cleaning is as possible stored in the gap of multi-layer sintering, uses middle meeting to make residue be mixed in product, product quality is worsened.

Crossed filter dish dull and stereotyped for fid with metal piercing in the past, punching resistance to compression version, the multi-ply constructions such as metal handstand arrangement fid, all can make the weight of filter material increase, simultaneously inner liquid communication is subject to impact in various degree, and particularly when ratio of viscosities is larger, circulating resistance increases.

The present invention is a kind of sintering filtering integral lamination metal filtration material, and thickness is 2/3 of present product, and weight is 1/2 of present product.For this purpose to complicated structure in the past with to improve, meets and under lower resistance, process molten polymer lower resistance filter, and employing meets disposable simple structure makes.

[specific implementation method]

The present invention is to for the purpose of claim 1, and in order to make sintering felt surface more have intensity, the two sides of sintering material is with the multiple net of 48 and 40 order number metals, middle for supporting the filtering material of the simple structure of the sandwich style of material.Support material graticule, jog weaves repeatedly, is formed with the multilayer integral sinter layer integration filter felt in section gap.

The present invention is to sintering the upper and lower surface elder generation of felt and high density 48 order and 40 object wire nettings for the purpose of claim 2, sinter when fusing point compares and taps into, then carry out double sintering with the special-shaped wire netting that 8 orders weave as intermediate standard wire netting or the special order number of fid.In order to improve the anti-pressure ability of fid and sintered filter material, first the metal net as support material being carried out to the passivation sintering of jog during sintering, then carrying out integral sintering.The part of the punched-plate of eliminating over, makes weight and filtration resistance lower.

The present invention is to integral sintering filter material for the purpose of claim 3, and because mesh grid and sintering felt one sinter, concavo-convex net and felt surface form internal rigid triangle rock-steady structure, make multi-layer sintering filter material have stronger compressive resistance ability.

[invention illustrates]

Fig. 1, Fig. 2 show the sintered filter dish 1 of integrated, multi-level sintering metal, are the filter materials 2 being gone out circular hole by heartcut, (fid 3 is made up of the graticule 5.6 of Fig. 3, Fig. 4 in detail) is formed with as 3 of backing material, in Fig. 5, filter material 2 and graticule 5,6 carry out overall double sintering simultaneously.

Filtering material 2 and backing material 3 integral sintered after material, through laser cutting, punching press sealing moulding is carried out to outer rim.

Outer support frame 4 shown in multi-layer sintering metal filtration dish 1, Fig. 2, is used as the support of middle segmentation to use in multi-filtering dish overlap.The outer surface that high polymer flows through this entered filter dish and filtered.

The support material 3 of upper note, is shown in Fig. 3, Fig. 4, the wire netting of standard, warp 5, the supporting network that parallel 6 is formed, and this tinsel can be the refractory metal silks such as stainless steel wire, nickel wire, the circle of wire diameter between 0.82mm and special-shaped wire.According to different service conditions, the material of various line and shape can adjust arbitrarily.Can place 25 graticules in usual 10mm, line number can increase the thickness of graticule while reducing.

Owing to improving structure, the support ring partial removal with perforation in the middle of traditional (Japanese Patent Laid-Open 11-76721), the more original situation of circulation area of this part adds about 1.5 times, makes flow resistance reduce simultaneously.

Specific embodiment, as shown in Figure 1, filtering material 2, backing material 3, filtering material 2 is that filter material fibrofelt and reinforcement fine metal net sinter and form, and carries out double sintering with the support material 3 of wire netting.The wire diameter of backing material wire netting is the warp 5 of 0.82mm, and parallel 6 knitting forming machine braiding forms.

510 order wire nettings of support material 3 available standards, or the double helix mesh grid of equivalent order number.

If overall weight can be made can to alleviate about 30 grams under adopting double helix mesh grid situation according to backing material 3.Most sags and crests makes the strong point increase compared with common plain net in the past, is increased by gap.Due to the lower thickness of mistake filter dish, originally the filter space of 60 pieces can hold the filter dish excessively of 90 pieces.

Special braiding backing material and common woven metal net support that material compares, and between concavo-convex graticule, gap rate increases successful.Special braided material is, stainless steel wire (diameter 0.8 millimeter), is made thickness 4mm.Pitot loss is 67.9kg/mm ², compare the pressure loss than goods always and reduce 10%.

[invention effect]

In sum, the present invention is owing to eliminating fid and the punched-plate filtered, and own wt alleviates, lower thickness, and operable filter dish piece number of crossing, under same space, can hold 1.5 times in the past.In same filtering traffic situation, extend the replacement cycle of filter, filter flowing resistance reduces flow behavior and improves.At 10001200kg/Hr phosphorus (polypropylene) polymer melt, carry out in technological process testing and being verified.

Owing to adopting single use structure, cleaned residual impurity problem compared with recycling with the past and improve completely.Filtering product is made to have more higher reliability.

[0026] owing to adopting single use structure, the rigidity of integral filter dish obviously strengthens, thus may be used for high pressure resistant high temperature, the filter material of high filtering precision.

Because crossing filter dish entirety is that same stainless steel material makes, used filter dish of crossing can directly reclaim, and dissolves recycling.

Accompanying drawing explanation

Fig. 1 was the sectional schematic diagram of filter dish; Fig. 2 was the floor map of filter dish; Fig. 3 was filter dish inner support material structure schematic diagram; Fig. 4 was filter dish inner support material spiral woven net graticule sectional schematic diagram; Fig. 5 was the filtering material structural map section of filter dish; Fig. 6 was that the finished product section of filter dish forms detail drawing.

Claims (4)

1. the multiple net metal sintering filter felt in two sides, crosses filter dish with middle 1 layer as the unitary metallic that the metal filter screen of backing material is integral sintered.

2. sintered metal filtration material is according to claim item 1, the special-shaped wire netting that net weaves as supporting layer or special order number is worked out by metal sintering felt and double helix standard metal, longitude and latitude, it is recessed that line weaves, male portion forms filter liquide, and through the integral sintered multilayer metal sintering screen pack be integrated.

3. sintered metal filtration material is according to claim item 1, first carries out once sintered to filter felt and protecting wire net, sintering temperature 500 DEG C; The special-shaped wire netting double sintering woven by multilayer metal sintering felt and 8 order wire nettings or special order number again, knot sintering temperature 700 DEG C.

4. the metal filtration dish described in claim 1, the fid in the middle of it can be plain weave metal net or spiral metal mesh grid.