CN87106060A - Special-shaped filter press sheet frame and mould pressing process - Google Patents
Special-shaped filter press sheet frame and mould pressing process Download PDFInfo
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- CN87106060A CN87106060A CN87106060.4A CN87106060A CN87106060A CN 87106060 A CN87106060 A CN 87106060A CN 87106060 A CN87106060 A CN 87106060A CN 87106060 A CN87106060 A CN 87106060A
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- sheet frame
- filter press
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Abstract
The present invention is the production technology of a kind of special-shaped filter press sheet frame and this sheet frame.The present invention has changed the production technology that sheet frame is laminated by sheet material hot pressing, employing is with glass fibre, the polypropylene granules of calcium carbonate, filling is extruded into plasticizing group material with extruder, this group's material is directly put into the sheet frame die cavity, compression moulding, special-shaped filter press sheet frame blank is made in the pressurize setting, is processed into the sheet frame of required specification through a small amount of machine cut.Production technology of the present invention is simple, made solid-liquid of heterotypic plate frame good separating effect, and production cost is low, has significantly economic benefit.
Description
The present invention relates to a kind of special-shaped filter press plate and frame or sheet frame assembly that strengthens with metal wire rod and be exclusively used in the mould pressing process of making this sheet frame; belong to chemical industry, departments such as environmental protection do the transformation of solid-liquid suspension two device for phase saparation and this equipment manufacturing technology.
In the prior art, the filter press sheet frame kind that is used for department's solid-liquid two device for phase saparation such as chemical industry, environmental protection is more, as casting property, wooden filter, rubber and fiberglass equipment etc., but uses polypropylene sheet frame comparatively generally.The shape of filter press Solid-Liquid Separation efficient and quality and durability and sheet frame, structure and material have direct relation, polypropylene filter press sheet frame production technology mainly adopts the hot pressing sheet layer to build up type (seeing Japan Patent J76026944) or huge injection machine injection mo(u)lding in the prior art, just by predetermined proportioning polypropylene, calcium carbonate, help to squeeze and drop into high-speed kneader, put into banbury after fully mixing and carry out internal mixing and plasticizing; Group's material after the plasticizing carries out secondary plasticizing through several multiple roll banburies and is made 0.2～0.6 millimeter flat sheets again by multi-rolling mill.Sheet layer builds up certain thickness, again with the large-sized hydraulic press pressurization, and heats in pressurization, makes each ply adhesion of sheet material, forms the polypropylene flat board of different-thickness.This flat board is carried out machine cut processing, make the filter press sheet frame of all size.Because the restriction of above-mentioned technology, the shape structure of filter press passage section is dull, striped linearly often, and solid-liquid separation effect is undesirable, the stacked sheet frame of making of sheet material hot pressing, and it is uneconomical to need heating again to waste energy, and plate easily produces delamination; Moreover the machine cut processing capacity is big, and production efficiency is not high.Though can adopt the above huge injection machine of myriagram to produce special-shaped filter press sheet frame, equipment investment is big, applies to also have certain limitation.
Task of the present invention is to overcome existing above-mentioned deficiency in the prior art, and a kind of special-shaped filter press sheet frame that strengthens with metal wire rod is provided, to reach sheet frame intensity height, the purpose of good effect of separating solid from liquid; Another task of the present invention just provides a kind of mold pressing production technology of making this abnormity filter press sheet frame that is exclusively used in, and is simple to reach technology, the purpose of low cost of manufacture.
The task that the present invention proposes solves by following technical proposal, and the present invention will be expected with the sheet frame group that extruder extrudes into plasticizing by glass fibre, calcium carbonate, polyolefin pellets, directly put into the sheet frame die cavity, extrusion forming after this group's material is taken out.After the pressurize setting, promptly make special-shaped filter press sheet frame blank.In order to improve sheet frame intensity, except that glass fibre strengthens, also can when die forming, embed steel, copper, aluminium alloy wires.Make the sheet frame blank through a small amount of machine cut processing by above-mentioned technology, or set up rubber seal and reduce the machining amount, make the filter press sheet frame of required specification at last.
The present invention will do at length to introduce by embodiment.
Fig. 1 is the sheet frame schematic diagram that the present invention adopts the reinforcing bar inserts to strengthen.
Fig. 2 is the A-A profile of Fig. 1.
Fig. 3 is that sheet frame of the present invention surface is the schematic diagram of reticulate pattern column.
Fig. 4 is the local enlarged diagram of reticulate pattern column.
Fig. 5 is the generalized section of reticulate pattern column.
Special-shaped polypropylene filter press sheet frame as shown in Figure 1 and Figure 2, at first polypropylene granules is mixed with glass fibre, calcium carbonate, auxiliary agent, under 200～320 ℃ temperature, extrude or roll pelletizing, under the temperature these are being mixed pellets input extruder extrusion plasticizings group material equally then, a certain amount of plasticizing is rolled into a ball material and is directly put into the compression moulding of sheet frame die cavity.This sheet frame die cavity can design according to required specification shape, structure, has changed and has adopted the linearly restriction of striped in the prior art, except that special-shaped level, can also be molded into box type stereo shape, has bigger flexibility.In order to improve the intensity of sheet frame, increase the service life, when compression moulding, can embed metal wire rods 1 such as steel, copper, aluminium alloy along the periphery of sheet frame, and also can reduce polyacrylic consumption relatively.The pressure of a general compacting plasticizing material can be controlled at 4～10Mpa, and keeps this pressure 10～20 minutes, makes the sheet frame cooling shaping.Sheet frame blank after the demoulding can't directly use, and must just can become finished product through a spot of finishing processing such as planer saws.If in order to reduce the cutting output of machining, also can on sheet frame, add rubber ring, to avoid phenomenon because of poor sealing between sheet frame out-of-flatness or sheet frame that burr were caused.
As Fig. 3～sheet frame reticulate pattern column 2 shown in Figure 5, the cross section of its column can other form such as square, circular, but the cross section that general drilling is processed to form is for circular, so cylindric comparatively convenient to adopt.This reticulate pattern column 2 on sheet frame surface can be improved to the solid-liquid separation efficiency of filter press.
The present invention compared with prior art has following advantage: because adopt compression molding technology, thereby the passage section of filter press frame can design according to the solid-liquid separating effect and reaches best, and production technology is greatly simplified than the stacked moulding of sheet material hot pressing, machine cut processing sword reduces, production cost greatly reduces, embed simultaneously the metal wire rod in sheet frame the mechanical strength of sheet frame is improved, prolong service life. Thereby the sheet frame that adopts technology of the present invention to produce has comparatively significantly economic benefit.
Claims (7)
1, a kind of filter press sheet frame mainly contains polyolefin, calcium carbonate, glass fibre and auxiliary agent, through hot-forming, it is characterized in that: be embedded with the metal wire rod 1 in order to gain in strength in the sheet frame.
2, filter press sheet frame as claimed in claim 1 is characterized in that, embeds the material of the metal wire rod 1 in the sheet frame, can be in the middle of steel, copper or the aluminium alloy any one.
3, filter press sheet frame as claimed in claim 1, it is characterized in that: the contact surface of sheet frame is reticulate pattern column 2 except that periphery.
4, as claim 1 or 3 described filter press sheet frames, it is characterized in that: the cross section of reticulate pattern column is for circular.
5, a kind of mould pressing process of filter press sheet frame, the composition pellet of sheet frame is extruded into soft plasticizing group material through extruder, it is characterized in that: this plasticizing material is directly sent into die cavity heating compression moulding, and the sheet frame of making required form, structure is repaired in the demoulding after pressurize setting cooling through machine cut.
6, the mould pressing process of filter press sheet frame as claimed in claim 5 is characterized in that: the dwell time is 10～20 minutes, and the pressure of maintenance is between 4～10Mpa.
7, the mould pressing process of filter press sheet frame as claimed in claim 5 is characterized in that: when extruder extrusion plasticizing group expected, temperature was controlled between 200～320 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87106060.4A CN1003424B (en) | 1987-08-29 | 1987-08-29 | Nonconventional type plate frame of filter press and its moulding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87106060.4A CN1003424B (en) | 1987-08-29 | 1987-08-29 | Nonconventional type plate frame of filter press and its moulding process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87106060A true CN87106060A (en) | 1988-03-16 |
| CN1003424B CN1003424B (en) | 1989-03-01 |
Family
ID=4815556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87106060.4A Expired CN1003424B (en) | 1987-08-29 | 1987-08-29 | Nonconventional type plate frame of filter press and its moulding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1003424B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708388B (en) * | 2009-08-06 | 2012-03-07 | 海宁通和复合材料有限公司 | Method for manufacturing pressure filtering plate |
-
1987
- 1987-08-29 CN CN87106060.4A patent/CN1003424B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1003424B (en) | 1989-03-01 |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |