CN106930156A - A kind of preparation method of fiber tubulose profiled member - Google Patents

Abstract

A kind of preparation method of fiber tubulose profiled member, its material is fiber or fiber and the adhesive with water as carrier, mould composition include two molded surfaces altogether with the outer surface identical half module of made tubular moulding part, it is initially in separated position, one surface configuration and made tubular moulding part inner surface identical core are placed between them, two half modules are molded by fiber pulp with the drainage with difference water pressure of air chamber, in lamination to core relative motion after enough fibrages or during lamination, until the die joint of two half modules is brought into close contact, core reaches setting gap with the gap of half module molded surface, the fiber of lamination is set fully to be dehydrated and be combined closely at die joint integral, then uniform temperature extraction core is cooled to after heated drying is together removed with core；The tubular moulding part that is produced of the present invention is with low cost, accurate size and closely knit firm, is adapted to the making production of the tubular moulding part of all use paper pulp raw materials.

Description

A kind of preparation method of fiber tubulose profiled member

Technical field

The present invention relates to by the fiber or fiber with water as carrier and adhesive by pile up, extrude and drying process be made tubulose into The method of type part, alleged fiber includes：Paper fiber and other organic fibers, also including inorfil；Alleged adhesive is included Machine and inorganic bond.

Background technology

Fiber tubulose profiled member kind is more, and two kinds that inventor pays close attention to the most are only enumerated herein, and one is transformer wet moulding Papery tubular dielectric part, making the tubular moulding part needs first to be ferreted out thick flat l Water Paper base on paper machine, then by being molded technician by l Water Paper base It is molded on fetalism by hand, production efficiency is extremely low, and product quality depends on the experience and skill of shaping technician, therefore its valency Lattice are sufficiently expensive；Another to be in casting industry, the paper runner channel pipe that the forming technique invented by Japanese Kao company is produced (is awarded Power notification number：CN100363127C), this kind of paper runner channel pipe is promoted the use of, but its forming technique is without departing from opening conventional paper The slurry molding half module of shaping hollow products technology, i.e., two synthesizes a die cavity, and paper fiber is made by slip casting in opening portion first backward die cavity Accumulation molding, injecting compressed air are dehydrated shaping paper fiber, then insert elastomer core by opening portion and be allowed to expansion to extrude Shaping paper fiber make it is sturdy with mould, and then hot shaping station also need to opening portion insert elastomer core and be allowed to expansion to obtain Excellent in shape, the shortcoming of above-mentioned technique be it is excessively cumbersome cause high cost, so as to seriously hinder the popularization of paper runner channel pipe to make With.

The content of the invention

In view of the present situation of existing transformer tubulose molded insulator process efficiency very low and paper runner channel pipe high cost, this Invention proposes that a kind of fiber or fiber by with water as carrier is made tubular moulding with adhesive by accumulation, extruding and drying process The method of part, alleged fiber includes：Paper fiber and other organic fibers, also including inorfil；Alleged adhesive includes organic And inorganic bond；The method can make the making of transformer tubulose insulating part realize that whole molds are produced by based on craft, carry The production efficiency and product quality of high transformer tubular dielectric part, make cost of manufacture become cheap；The method is applied to papery simultaneously Simplified flowsheet step so that product cost is significantly reduced, and can be made the intensity and outward appearance of paper runner channel pipe by the making of pouring channel tube More optimize, be advantageous to the popularization of paper runner channel pipe.

The tubular moulding part that the technology is adapted to make is not limited in transformer tubulose molded insulator and paper runner channel pipe, owns This technology can be used by the fiberizing part of wet moulding.

What technical solution of the invention was realized in：

1st, fiber or fiber and adhesive of the materials'use of tubular moulding part with water as carrier, mould composition include two into Type surface altogether with the outer surface identical half module of made tubular moulding part, the air chamber of each half module can respectively lead to big by setting Gas, vacuum or compressed air, air chamber have aperture or gap to communicate with molded surface, and molded surface is also covered with can be passed water through simultaneously The net or porous material layer of decorating film in paper pulp are intercepted, two half modules are initially in separated position, a surface configuration and institute's tubulation Shape profiled member inner surface identical core is placed between two half modules；

2nd, two half modules can be after its molded surface be immersed in the slurry that fiber or fiber and adhesive and water are formed by fibre Dimension slurry is molded with the drainage with difference water pressure of air chamber, and the core and two initial distances of half module will disclosure satisfy that two half module drainage blankets The requirement not hindered of product fiber；

3rd, two half modules can in lamination after enough fibrages or during lamination to core relative motion, until The die joint of two half modules is brought into close contact, while core reaches setting gap with the gap of half module molded surface；Core and half module Collective effect makes the fiber of lamination fully be dehydrated；After two half modules are brought into close contact, the fibrage of molded surface is in 0.01 to 40Mpa Combined closely at die joint under pressure effect integral, economic pressure is 0.5 to 10Mpa；

4th, it is negative pressure that the lamination shaping of two half modules can be relied on and set its air chamber, so as to form vacuum forming mode；

5th, mode in addition is：One half module is arranged on upper mold mounting plate as upper mould, and another is arranged on down for lower mould It is enclosed within lower mould (or upper mould) installing plate with also including a dynamic sealing on mold mounting plate, in mould composition, its upper end (lower end) With the cylinder cylinder that upper mould (or lower mould) installing plate forms static seal, upper mold mounting plate, lower mold mounting plate and the cylinder cylinder three's group Into a sealing space, under external force upper and lower mold mounting plate can move toward one another, be now enclosed within lower mould (or upper mould) installing plate On cylinder cylinder also and then relative to lower mould (or upper mould) installing plate slide so that three composition sealing space volume constantly contract It is small, so as to produce pressure to sealing fiber pulp therebetween, the water in fiber pulp is constantly extruded from half module molded surface and fine Dimension is layeredly deposited in half module molded surface, and this mode is referred to as sealed extruded shaping；Make in core and half module collective effect Before the fiber of lamination is fully dehydrated, fiber pulp pressure limit under which is 0.01 to 40Mpa, it is most economical be 0.01 to 8Mpa。

6th, to increase bond strength of two paper fiber layers of mold half surface at die joint, can be by the shaping table of each half module Face extends the flange parallel with die joint to form both sides, and the width of its flange is mutually suitable with the radial dimension of tubular moulding part；Turn over The width on side is with the radial dimension of ratio of tubular moulding part about 1/100 to 1/5 or so；The fin of the tubular moulding part being consequently formed While the bending strength and local sag resistant ability to tubular moulding part significantly increase effect, the fin of the insertion end of tubular moulding part While can use suitable instrument to remove.

7th, the method that core is arranged between two half modules is：The certain length of core at least one end is in half module molded surface Coverage outside, core relies together with the termination of this certain length removably connects firmly with core support, core support and two There is one or more locating rod to position between at least one of individual half mold mounting plate, core support can be enclosed within locating rod On slide up and down, with realize core relative to two half modules close to or away from motion.

8th, same upper and lower mold mounting plate and cylinder cylinder composition mould in or vacuum forming mode same forming machine Can be laid in structure more than two sets more half modules and core combination, they can be it is duplicate can also be that shape is different, It is preferred that the wall thickness of the tubular moulding part being molded has identical or approximate thickness requirement.

9th, core is made up of the larger plastic material of thermal coefficient of expansion, core can be it is solid can also have axial long hole , the core of L-shaped pipe and three-way pipe can be made up of the intersecting connection of two pieces sticking plaster, and four-way pipe is then by be generally aligned in the same plane three The intersecting connection composition of sticking plaster；Described intersecting connection is plug type；

10th, core is together removed with the wet base of tubular moulding part coated outside it, is placed to moisture content in ventilation at normal temperatures Send into dryer to dry or be placed in hot-die when dropping to 25-50% and dry, it is also possible to be directly entered drying machine drying or be placed in heat Dried in mould；When moisture content be down to less than 10% (preferably less than 6%) take out be cooled to smoothly can extract core needed for temperature When spending, core is extracted out reuse；

Compared with prior art, advantage of the invention is obvious：

Present invention successfully solves the low problem of transformer tubulose molded insulator production efficiency, especially by tubular moulding part To be changed with the wet base offhand of flat board be, by forcing press straight forming, to substantially reduce production cost in paper pulp die；Mould is high It is molded to make that insulating part density is higher, shape is more accurate, thus dielectric strength is higher.Simultaneously this invention also solves paper runner channel Plumber's skill is excessively complicated, causes high cost to promote ineffective problem, and the present invention can make paper runner channel pipe remain original Have more closely knit, firmer under the premise of light weight, easy-operating advantage, so that breakage rate will also be significantly reduced；It is adapted to make for all Produced with the making of the tubular moulding part of paper pulp raw material, the present invention has low cost product, accurate size and closely knit firm Advantage.

Brief description of the drawings：

Accompanying drawing of the present invention page 2, i.e.,：

Fig. 1 to Fig. 3 is that the mould structure of the sealed extruded molding mode for making tubular moulding part is illustrated：Respectively：Shape during slip casting State when state and sealed extruded are ended when state, sealed extruded start；

Fig. 4 is that L-type casting pouring channel tube is illustrated；

Fig. 5 is that the mould of one-shot forming multiple tubular moulding part is illustrated.

In figure：11 is upper mold section；12 is upper half mold mounting plate；21 is female die；22 is lower half mold mounting plate；31 is core； 32 is core support；33 is core support locating rod；41 is cylinder cylinder；51 is paper runner channel pipe.

Specific embodiment

The L-type papery of embodiment 1 casts the forming method of pouring channel tube：

Step one：Slip casting quantifies the mixed slurry that the concentration with old and useless newspaper, carbon fiber and adhesive as waste is 1% Ground is injected in the mould cavity volume made by sealed extruded molding mode, as shown in figure 1, sealed extruded mould composition includes into Type surface with flange upper mold section 11 and female die 21, can lift upper half mold mounting plate 12, be fixed on profiled member work Core 31, core support 32, core support locating rod 33 and dynamic sealing that lower half mold mounting plate 22, nylon 6 on platform are made Be enclosed within circular cylinder cylinder 41 on lower mold mounting plate 22, now upper half mold mounting plate 12 and cylinder 41 upper surface separate, Cylinder cylinder 41 is in maximum volume state with the cavity volume that lower mold mounting plate 22 is formed；

Step 2：Shaping is as shown in Fig. 2 the descending contact cylinder cylinder of Schilling upper half mold mounting plate 12 and sets up close at 41 upper surfaces Envelope, while making core 31 be in apart from upper mold section 11 and female die 21 close to equal position；Then proceed to that upper mold section is installed Plate 12 is descending cause it is continuous by upper mold mounting plate 12, lower mold mounting plate 22 and cylinder the cylinder sealing space volume that constitutes of 41 threes Reduce, so as to the mixed slurry to sealing therebetween produces pressure, the water in mixed slurry is constantly squeezed from half module molded surface Go out and be deposited in half module molded surface fibre layeredly, until the die joint of upper mold section 11 and female die 21 is brought into close contact, while The distance of core 31 and half module molded surface is constantly reduced until reach setting gap, core 31 and two half modules 11 and 21 Collective effect makes the fiber of lamination fully be dehydrated, and after two half modules 11 and 21 are brought into close contact, the fibrage of molded surface is most The effect of 10Mpa pressure is lower greatly is fully dehydrated and is combined closely at die joint integrally, as shown in Figure 3；

Step 3：Mold mounting plate 12 is up in drying opens mould cavity volume, takes out molded moisture content and is about 48% or so L-type paper runner channel pipe 51 (as shown in Figure 4) wet base and the core 31 coated by it are simultaneously sent in dryer with 120 degree of temperature Taken out within drying to moisture content 6%, the density of dried L-type paper runner channel pipe is 0.8 to 1.0 gram/cc；

Step 4：L-type paper runner channel pipe 51 after drying and core 31 are placed in air-cooled decline and warmed to room temperature by extraction core, Due to the thermal coefficient of expansion of the thermal coefficient of expansion more than the tubular moulding part that density is more than 0.8 of nylon 6, so now L-type paper Gap is produced between the inwall of matter pouring channel tube 51 and the outer surface of core 31, can respectively from two mouths of pipe of L-type paper runner channel pipe 51 Take out two cores 31 of the orthogonal grafting composition of nylon rod in place.

The forming method of the transformer tubulose insulating part of embodiment 2：

Step one：The slurry that concentration with true qualities insulation pulps as waste is 0.3% is quantitatively injected and is squeezed by sealing by slip casting In the mould cavity volume that molded mode is made, (wherein upper mold section 11 and female die 21 in addition to the shape and size of molded surface The flange width of molded surface is less than embodiment 1 with the ratio of caliber), mould composition is same as Example 1.

Step 2：After shaping is brought into close contact except two half modules 11 and 21, maximum pressure ratio suffered by the fibrage of molded surface 10Mpa is reached outside 15Mpa more greatly, and remaining is same with embodiment 1；

Step 3：Mold mounting plate 12 is up in drying opens mould cavity volume, takes out molded moisture content and is about 46% or so The wet base of transformer tubulose insulating part and the core 31 coated by it and being sent in hot pressing die is dried to aqueous with 120 degree of temperature Taken out within rate 6%, the density of dried transformer tubulose insulating part is 1.0 to 1.2 grams/cc；

Step 4：Extract core similar to Example 1, slightly.

Embodiment 3：Can be with the mould of one-shot forming multiple tubular moulding part

As shown in figure 5, one by be provided with cylinder cylinder and the die cavity that constitutes of upper and lower mold mounting plate many set upper mold sections 11, under Half module 21 and core 31 are combined, and can once be molded multiple tubular moulding parts.

Claims (9)

1. fiber or fiber and adhesive of the materials'use of tubular moulding part with water as carrier, mould composition include two into Type surface altogether with the outer surface identical half module of made tubular moulding part, the air chamber of each half module can respectively lead to big by setting Gas, vacuum or compressed air, air chamber have aperture or gap to communicate with molded surface, and molded surface is also covered with can be passed water through simultaneously Intercept the net or porous material layer of decorating film in paper pulp, it is characterised in that：Two half modules are initially in separated position, a surface Shape and made tubular moulding part inner surface identical core are placed between two half modules.

2. as the forming method described in claim 1, it is characterised in that：Two half modules can immerse fine in its molded surface After in the fiber pulp that dimension or fiber are formed with adhesive and water, the drainage with difference water pressure by fiber pulp and air chamber is molded；Two half module energy To core relative motion after enough enough fibrages in lamination or during lamination, until the die joint of two half modules is tight Laminating, while core reaches with the gap of half module molded surface sets gap, the collective effect of core and half module makes the fibre of lamination Dimension fully dehydration；After two half modules are brought into close contact, the fibrage of molded surface is under the effect of 0.01 to 40Mpa pressure in die joint Place combines closely integrally, and economic pressure is 0.5 to 10Mpa.

3. as the forming method described in claim 2, it is characterised in that：One half module is installed as upper mould installed in upper mould On plate, another is that lower mould is arranged on lower mold mounting plate, be enclosed within while dynamic sealing is also included in mould composition lower mould (or on Mould) on installing plate, its upper end (lower end) forms the cylinder cylinder of static seal with upper mould (or lower mould) installing plate, upper mold mounting plate, Lower mold mounting plate and the cylinder cylinder three constitute a sealing space, under external force upper and lower mold mounting plate can move toward one another, this When be enclosed within lower mould (or upper mould) installing plate cylinder cylinder also and then relative to lower mould (or upper mould) installing plate slide so that three The sealing space volume of person's composition constantly reduces, and so as to produce pressure to sealing fiber pulp therebetween, makes water in fiber pulp not Disconnected being extruded from half module molded surface and fibre layered be deposited in half module molded surface.

4. as the forming method described in claim 2, it is characterised in that：The lamination shaping of two half modules can rely on setting Its air chamber is negative pressure, so as to form vacuum forming mode.

5. the forming method as described in claim 3 and 4, it is characterised in that：To increase by two paper fibers of mold half surface Bond strength of the layer at die joint, the molded surface of each half module can be extended the flange parallel with die joint to form both sides, The radial dimension of the width of its flange and tubular moulding part is mutually suitable, the width of flange and the radial dimension of ratio of tubular moulding part About 1/10 to 1/5 or so, the fin side of tubular moulding part is consequently formed, the fin side of the insertion end of tubular moulding part is available suitable Instrument is removed.

6. the forming method as described in claim 3 to claim 5, it is characterised in that：Core is arranged on two half modules Between method be：Outside the coverage of half module molded surface, core relies this certain to the certain length of core at least one end Together with the termination of length removably connects firmly with core support, between at least one of core support and two and half mold mounting plates There is one or more locating rod to position, core support can cover and slide up and down on the securing lever, with realize core relative to Two half modules close to or away from motion.

7. as the forming method described in claim 6, it is characterised in that：Same shaping mechanism can install more than two sets more Many half modules and core are combined, they can be it is duplicate can also be that shape is different, it is preferred that the pipe being molded The wall thickness of shape profiled member has identical or approximate thickness requirement.

8. the forming method as described in claim 6 and 7, it is characterised in that：Core is by the larger plastics of thermal coefficient of expansion Material is made, and core can be the solid axial long hole that can also have, and the core of L-shaped pipe and three-way pipe can be by two pieces plastics The intersecting connection composition of rod, four-way pipe is then made up of the intersecting connection of three sticking plasters being generally aligned in the same plane；Described intersecting connection is Plug type.

9. as the forming method described in claim 8, it is characterised in that：Core with cladding its outside the wet base of tubular moulding part Together it is removed, is sent into when ventilation is placed and drops to 25-50% to moisture content at normal temperatures in dryer and dry or be placed in hot-die Middle drying, it is also possible to be directly entered drying machine drying or be placed in hot-die dry；When moisture content is down to less than 10% (preferably 6% When taking-up is cooled to and can smoothly extract temperature needed for core below), core is extracted out reuse.