CN114101589A - Method for manufacturing paper runner pipe combined by half pipes - Google Patents
Method for manufacturing paper runner pipe combined by half pipes Download PDFInfo
- Publication number
- CN114101589A CN114101589A CN202111291677.1A CN202111291677A CN114101589A CN 114101589 A CN114101589 A CN 114101589A CN 202111291677 A CN202111291677 A CN 202111291677A CN 114101589 A CN114101589 A CN 114101589A
- Authority
- CN
- China
- Prior art keywords
- adhesive
- wet blank
- semi
- pipe
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000005520 cutting process Methods 0.000 claims abstract description 52
- 238000009998 heat setting Methods 0.000 claims abstract description 48
- 239000000853 adhesive Substances 0.000 claims abstract description 40
- 230000001070 adhesive effect Effects 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 238000013007 heat curing Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000004537 pulping Methods 0.000 claims abstract description 13
- 239000011268 mixed slurry Substances 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 5
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 28
- 229920001568 phenolic resin Polymers 0.000 claims description 28
- 239000005011 phenolic resin Substances 0.000 claims description 28
- 239000003292 glue Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 20
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims description 17
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 17
- 238000001723 curing Methods 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 13
- 229920003986 novolac Polymers 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 6
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 6
- 239000012943 hotmelt Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052850 kyanite Inorganic materials 0.000 claims description 2
- 239000010443 kyanite Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920003987 resole Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000007666 vacuum forming Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2233—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- B22C1/2246—Condensation polymers of aldehydes and ketones
- B22C1/2253—Condensation polymers of aldehydes and ketones with phenols
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
A method for manufacturing a paper runner pipe combined by half pipes comprises the following steps: the method comprises the following steps: pulping: crushing and dispersing the raw materials weighed in advance, and pulping by using circulating water to obtain mixed pulp; step two: molding: injecting the mixed slurry obtained in the step one into a forming machine to form a semi-pipe wet blank of at least two pipe fittings which are connected together at a flange; step three: and (3) drying a wet blank: drying the formed wet blank obtained in the step two until the water content is 0-35%; step four: die cutting, heat setting and curing to obtain a semi-tube finished product; step five: bonding: gluing the adhesive surfaces of the two semi-tube finished products, then respectively putting the adhesive surfaces into two semi-molds of a pair of adhesive molds, and aligning the adhesive surfaces accurately and then pressing the adhesive surfaces; step six: and (3) dividing: and finally cutting the residual joints after die cutting. The paper pouring pipe prepared by the preparation method can ensure the performance of the paper pouring pipe and also can greatly reduce the production cost, thereby widely popularizing the paper pouring pipe.
Description
Technical Field
The invention belongs to the field of preparation of a runner pipe, and particularly relates to a method for manufacturing a paper runner pipe formed by combining half pipes.
Background
The runner pipe is a common consumable material for casting, paper runner pipes, ceramic runner pipes, foam runners and the like are common in the market, the wet-forming paper runner pipe of the japanese king patent CN100363127C has certain market share in china and is produced by multiple factories, but the wet-forming paper runner pipe faces the problem that the paper runner pipe cannot compete with the ceramic runner pipe and the foam runner due to overhigh manufacturing cost caused by two reasons of raw materials and processes, so that the casting consumable material of the paper runner pipe, which has the advantages of being convenient to use, effectively improving the casting quality, reducing solid waste emission and the like, cannot be widely popularized.
The paper runner pipe manufactured by the method of manufacturing the half pipe by the wet method and then combining the half pipe with the complete pipe meets the requirements of users in service performance, and compared with the paper runner pipe manufactured by the King of flowers technology, the process has the advantages of cost advantage and suitability for manufacturing pipes with complex shapes, but still faces the problem that the cost needs to be further reduced if large-area popularization is desired, such as the following aspects:
1. selection of raw materials: in order to meet the requirements of normal temperature strength and high temperature strength of a runner pipe in the prior art, a certain proportion of expensive carbon fiber needs to be added in practice, so that the raw material cost is increased.
2. The proportion of the linear phenolic resin to the curing agent urotropine is as follows: in the prior art, when the linear phenolic resin is used as a bonding agent, the urotropine and the linear phenolic resin are generally mixed according to the weight ratio of 1:9, and practice proves that the urotropine amount is too small at the ratio for a half-pipe combined paper runner pipe manufacturing process, and the time in a heat setting die must be prolonged for the linear phenolic resin to be cured to establish the necessary normal temperature strength, so that the production efficiency is greatly reduced.
3. The method for dividing the pipe fittings in each die comprises the following steps: in the prior art, after half pipes are subjected to heat setting and curing and glued and bonded into a whole, the half pipes are divided by adopting methods such as saw cutting, engraving and milling by a woodwork engraving and milling machine and the like, and practice proves that the method has low efficiency and large dust.
4. The adhesive surface sizing method comprises the following steps: in the prior art, a glue rolling machine is used for rolling hot melt glue, but the problem of how to roll a hard, non-smooth and discontinuous adhesive surface with hot melt glue uniformly is not solved, so a dispensing machine is only adopted, and the efficiency of the dispensing machine is far lower than that of a glue rolling machine.
Disclosure of Invention
The invention provides a method for manufacturing a paper runner pipe combined by half pipes, which is used for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
a method for manufacturing a paper runner pipe combined by half pipes comprises the following steps:
the method comprises the following steps: pulping: crushing and dispersing the raw materials weighed in advance, and pulping by using circulating water to obtain mixed pulp;
step two: molding: injecting the mixed slurry obtained in the step one into a forming machine, and forming a semi-pipe wet blank of at least two pipe fittings connected together at a flange by adopting a negative pressure or positive pressure method;
step three: and (3) drying a wet blank: drying the formed wet blank obtained in the step two until the water content is 0-35%;
step four: die cutting, heat setting and curing: putting the dried formed wet blank into a heat setting die provided with a cutter for die cutting, heat setting and curing to obtain a semi-tube finished product;
step five: bonding: gluing the adhesive surfaces of the two semi-tube finished products, then respectively putting the adhesive surfaces into two semi-molds of a pair of adhesive molds, and aligning the adhesive surfaces accurately and then pressing the adhesive surfaces;
step six: and (3) dividing: and finally cutting the residual joints after die cutting.
In the method for manufacturing the paper runner pipe combined by the half pipes, the concentration of the mixed slurry is 0.3-2%.
The manufacturing method of the paper runner pipe combined by the half pipes comprises the following raw materials in parts by weight: aluminosilicate fibers and/or aluminosilicate fibers: 20-80 parts; paper fiber: 5-30 parts; adhesive: 5-40 parts; refractory powder: 0-60 parts.
In the method for manufacturing the paper runner pipe combined by the half pipes, the refractory powder is any one or a mixture of two or more of high-alumina powder, kyanite powder, crystalline flake graphite powder and the like in any proportion.
In the method for manufacturing the paper runner pipe combined by the half pipes, the adhesive is the novolac resin.
According to the manufacturing method of the paper runner pipe formed by combining the half pipes, the linear phenolic resin and other raw materials are crushed or dispersed in the step one, and the linear phenolic resin curing agent urotropine is added into the circulating water in the step one.
The concentration of the curing agent urotropine is more than or equal to (1-moisture content of a wet blank) and 5 percent of the linear phenolic resin per moisture content of the wet blank.
In the method for manufacturing the paper runner pipe combined by the half pipes, the wet blank is dried until the water content is 8-35%.
According to the manufacturing method of the paper runner pipe formed by combining the half pipes, the cutting edge angle of the cutter on the heat setting mould is 15-60 degrees, and the height of the cutter exposed out of the surface of the heat setting mould is approximately equal to the minimum clearance set by the heat setting male and female dies during hot pressing.
The method for manufacturing the paper runner pipe combined by the half pipes comprises the following steps that glue is applied by adopting a glue rolling method of hot melt glue in the fifth step, the half pipe finished product is placed into a mould with the upper and lower surfaces parallel, glue is applied between a glue roller and a press roller of a glue rolling machine, and the mould comprises a hard matrix and an elastic material layer which can be tightly attached to the back surface of the adhesive surface of the half pipe finished product.
According to the manufacturing method of the paper runner pipe formed by combining the half pipes, the adhesive further comprises silica sol or soluble phenolic resin, and the silica sol or the soluble phenolic resin is applied by adopting a spraying or dipping method after the wet blank is dried until the water content is 0-30%.
The invention has the advantages that:
1. the paper pouring pipe prepared by the preparation method can ensure the performance of the paper pouring pipe and also can greatly reduce the production cost, thereby widely popularizing the paper pouring pipe.
2. When the adhesive is the linear phenol formaldehyde resin, the invention presets the concentration of the urotropine in the circulating water, so that the linear phenol formaldehyde resin obtains sufficient and evenly distributed urotropine, thereby shortening the primary curing time in a heat setting mould from 2 minutes to 40 seconds at the fastest and obviously improving the production efficiency.
3. When the adhesive is silica sol, the product of the invention obtains higher fire resistance and can be suitable for cast steel production.
4. Compared with other existing cutting methods, the die cutting method has the advantages that the die cutting is performed in the heat setting-curing process, the material is in a water-containing soft state, so that the die cutting method is easy to cut through, efficient, energy-saving and environment-friendly, and meanwhile, the die cutting enables the width of the bonding edge of the runner pipe to be accurate and is convenient for mutual socket connection.
5. The soft and hard two-layer design of the rubber rolling tire material can ensure that the rubber layer is uniformly coated, so that the rubber rolling method of the hot melt adhesive is successfully applied to the production of paper runner pipes, the production efficiency of gluing is improved by more than 10 times, and the rubber rolling tire material is more environment-friendly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is one of the production diagrams of the present invention;
FIG. 2 is a second product diagram of the present invention;
FIG. 3 is a third product diagram of the present invention;
FIG. 4 is a fourth illustration of the product of the present invention;
FIG. 5 is a fifth illustration of the product of the present invention;
FIG. 6 is one of the assembly views for use of the paper runner tube made by the present invention;
FIG. 7 is a second assembly view of the paper runner tube made in accordance with the present invention;
FIG. 8 is a third illustration of the assembly of the paper runner tube made in accordance with the present invention;
FIG. 9 is one of the schematic drawings of a paper runner tube made in accordance with the present invention after use;
FIG. 10 is a second schematic view of the paper runner tube made in accordance with the present invention after use;
FIG. 11 is a third schematic view of a paper runner tube made in accordance with the present invention after use;
FIG. 12 is a fourth schematic view of a paper runner tube made in accordance with the present invention after use;
FIG. 13 is one of the cutter mounting illustrations of the present invention;
FIG. 14 is a second schematic view of the cutter mounting of the present invention;
fig. 15 is a schematic view of a rubber rolling die of the present invention.
Reference numerals: 11. a trench; 12. a cutter; 13. pressing a plate; 14. a screw; 15. mounting holes; 20, a mould; 21 a carcass; 22. a layer of elastomeric material.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for manufacturing a paper runner pipe combined by half pipes comprises the following steps:
the method comprises the following steps: pulping: crushing and dispersing the raw materials weighed in advance, and pulping by using circulating water to obtain mixed pulp;
step two: molding: injecting the mixed slurry obtained in the step one into a forming machine, and forming a semi-pipe wet blank of at least two pipe fittings connected together at a flange by adopting a negative pressure or positive pressure method;
step three: and (3) drying a wet blank: drying the formed wet blank obtained in the step two until the water content is 0-35%;
step four: die cutting, heat setting and curing: putting the dried formed wet blank into a heat setting die provided with a cutter for die cutting, heat setting and curing to obtain a semi-tube finished product;
step five: bonding: gluing the adhesive surfaces of the two semi-tube finished products, then respectively putting the adhesive surfaces into two semi-molds of a pair of adhesive molds, and aligning the adhesive surfaces accurately and then pressing the adhesive surfaces;
step six: and (3) dividing: and finally cutting the residual joints after die cutting.
In the method for manufacturing the paper runner pipe combined by the half pipes, the concentration of the mixed slurry is 0.3-2%.
Preferably, the weight parts of the raw materials in the step one are as follows: aluminosilicate fibers and/or aluminosilicate fibers: 20-80 parts; paper fiber: 5-30 parts; adhesive: 5-40 parts; refractory powder: 0-60 parts.
Preferably, the refractory powder is any one or a mixture of two or more of high-alumina powder, sapphire powder, crystalline flake graphite powder and the like mixed in any proportion.
Preferably, the binder is a novolac resin.
The linear phenolic resin and other raw materials are crushed or scattered in the first step, urotropine serving as a linear phenolic resin curing agent is added into circulating water in the first step, and the concentration of the urotropine is more than or equal to (1-wet blank water content) × 5% of the percentage content of the linear phenolic resin per wet blank water content; the derivation process of the above equation:
the concentration of urotropine is more than or equal to 5 percent (the minimum dosage of curing agent) of the weight of the novolac resin in each wet blank/the water content of each wet blank
Dry weight of novolac resin per wet blank 5%/moisture content per wet blank dry weight/(1-moisture content)
Percent content of ═ linear phenolic resin 5%/wet blank water content/(1-wet blank water content)
(1-wet green moisture content) novolac percentage content 5%/wet green moisture content;
the upper limit of the urotropine concentration can be obtained according to the maximum dosage of the curing agent.
When the linear phenolic resin is used as the adhesive, the moisture content of the wet blank formed by adopting a negative pressure method is preferably 50-55%; the moisture content of the wet blank formed by adopting a positive pressure method is preferably 42-50%.
Preferably, when the linear phenolic resin is used as the adhesive, the wet blank formed by the negative pressure method is dried by a dehydration mode such as natural airing or a dehumidifying room or a tunnel dryer and the like until the water content is 8-35%, the wet blank is easy to be pulled apart and cannot reach the required density during heat setting after being over-dried, and the wet blank is easy to be adhered to a mold and prolongs the curing time so as to reduce the use efficiency of equipment;
preferably, the binder is silica sol or soluble phenolic resin.
When silica sol or soluble phenolic resin is used as the binder, the adding method comprises the following steps: drying the formed wet blank until the water content is in the range of 0-30%, and adding by a dipping method or a spraying method (namely the adding amount of the adhesive in the pulping step is 0%), wherein the adding amount is generally 5-40% of the weight of the cured adhesive in terms of solid content. If a silica sol having a solid content of 30% is used and the amount of the silica sol after curing is 15% or more of the total weight of the product, the amount of the silica sol added A ≧ 0.5882, which is the theoretical weight of the dry preform before impregnation. Note: according to the set conditions: 30% of A ≧ 30%/(W + 30%) of ≧ 15%.
When silica sol or soluble phenolic resin is used as a binder, the initial moisture content of the wet green formed by the negative pressure method is generally 30-50%.
Preferably, when the silica sol or the soluble phenolic resin is used as the adhesive, the moisture content of the wet blank after the silica sol or the soluble phenolic resin is added is controlled to be 8-35%;
preferably, the cutting edge angle of the cutting knife embedded on the heat setting die is 15-60 degrees, the height of the exposed die surface is approximately equal to the minimum clearance set by the heat setting convex-concave die during hot pressing, half pipes of at least two pipe fittings after die cutting and heat setting curing can be not completely cut mutually, or a part of a connecting part is still reserved at a place without the cutting edge, or the height of the cutting edge exposed on the die surface is 0.1-0.5mm smaller than the minimum clearance set by the heat setting convex-concave die during hot pressing although the cutting edge is arranged, so that the half pipes of at least two pipe fittings after die cutting still keep a whole.
Preferably, the blade life can be prolonged by using a high-speed steel blade with the edge angle of 30-52 degrees and the thickness of 1.5-3 mm;
preferably, grooves 11 of rectangular cross section are machined on the concave (convex) die surface of the heat setting die; placing the cutter 12 in the groove 11; the cutter 12 is fixed in a groove 11 formed on a concave (convex) die of the heat setting die by a steel pressing plate 13 and a screw 14.
Preferably, a groove 11 with a rectangular cross section is processed on the surface of a concave (convex) die of the heat setting die, a mounting hole 15 is formed in the groove 11, the cutter 12 is knocked into the groove 11 during mounting, and the cutter 12 can be detached by knocking after the cutter 12 extends into a steel bar from the mounting hole 15 on the bottom surface during detaching.
Preferably, the glue is applied by a glue rolling method of hot melt glue, the semi-pipe finished product is placed into a mould 20 with parallel upper and lower surfaces, glue is applied between a glue roller and a press roller of a glue rolling machine, and the mould 20 comprises a matrix 21 made of hard materials and an elastic material layer 22 which can be tightly attached to the back surface of the adhesive surface of the semi-pipe finished product;
most of the connections between two or more bonded tubes have been cut off by die cutting, and only a few of the connections need to be finally cut in the cutting step, such as by sawing (for four-sided connections), routing (for intermediate connections) and hand-breaking.
EXAMPLE 1 production of paper-based pouring tube suitable for cast iron
[ washing of aluminum silicate fiber ] the content of slag balls of the aluminum silicate fiber is reduced to below 10% by a two-stage rinsing process, and the aluminum silicate fiber is dehydrated by a centrifugal drier until the water content is 15%.
The raw materials of the pulping are proportioned as follows: the raw materials comprise the following components in percentage by mass:
waste newspaper: 13 kg; aluminum silicate fiber: 40 kg; high aluminum powder: 23 kg; phenol novolac resin: 24 kg.
The raw materials are added into urotropine aqueous solution with required concentration, and mixed pulp with the raw material concentration of 0.65 percent is prepared by crushing and stirring.
The concentration of the desired urotropine in water is (1-52%) 24%. 13.5%/52%. 3.0%
The weight ratio of urotropin/resin here was taken to be 0.135.
The mixed slurry is injected into a slurry tank of a vacuum forming machine, a plurality of half-pipe forming dies are immersed into the slurry tank for vacuum adsorption forming, and the moisture content of a formed wet blank is about 52 percent.
Wet green drying the wet green was dried from an initial water content of about 52% by natural drying to a water content of about 14%.
[ die cutting-heat setting-curing ] the formed wet blank is transferred into a die cutting-heat setting-curing die to be subjected to die cutting, heat setting and curing, a cutter is installed on a female die, the cutting edge angle is 40 degrees, the exposed die surface height is 1.6mm (keeping a part of a joint) and 1.8mm (completely cutting off), the set minimum clearance of the heat setting male die and the heat setting female die is 1.8mm during hot pressing, and the heat setting pressure is 3.5 MPa.
[ bonding ] (1) each half pipe is rubberized by a hot melt adhesive rubberizing machine by using a rubberizing tire, and the rubberizing tire consists of a hard material layer and an elastic material layer which are respectively manufactured according to the shape of the half pipe; (2) the bonding surfaces of the two half pipes are oppositely and respectively arranged in an upper bonding die and a lower bonding die on a bonding press machine and then are pressed to a set pressure, the upper bonding die and the lower bonding die are accurately aligned by a positioning and guiding device of the press machine, and the two half pipes are prevented from being misplaced and fully pressed after being bonded.
Cutting most of the connections between two or more bonded tubes are cut off by die cutting, and only a sawing and trimming and a hand breaking method are needed in the cutting step.
Embodiment 2 manufacturing paper runner pipe suitable for wind power equipment casting
Generally, the paper runner pipe cannot be used for wind power equipment castings, and even the fire resistance of the runner pipe which is made of carbon fibers and is mainly made of the carbon fibers of the Kao corporation is not enough, the runner pipe made by the embodiment can meet the use requirements of wind power castings with pouring time of 5 minutes and water head height of 4.5 meters.
The raw materials of the pulping are proportioned as follows: the raw materials comprise the following components in percentage by mass:
waste newspaper: 13 kg; high-aluminum fiber: 36 kg; high aluminum powder: 21 kg; cyanite powder: 7 kg; phenol novolac resin: 23 kg;
the raw materials are added into urotropine aqueous solution with the concentration of 3.1 percent, and mixed pulp with the raw material concentration of 0.6 percent is prepared by crushing and stirring.
The mixed slurry is injected into a mold cavity of a positive pressure forming machine, a plurality of half-pipe forming molds are formed under the pressure effect, and the moisture content of a formed wet blank is about 47 percent.
[ die cutting, heat setting and curing ] the formed wet blank is transferred to a die cutting and heat setting die for die cutting, heat setting and curing when being dried until the moisture content is 25%. The cutter is arranged on the female die, the cutting edge angle is 45 degrees, the height of the exposed surface of the die is 1.7mm (keeping a part of the connection part) and 1.9mm (completely cutting part), the minimum clearance is 1.9mm during the hot pressing set by the heat setting male die and the heat setting female die, and the heat setting pressure is 5 MPa.
[ adhesion ] [ division ] the same as example 1, but omitting.
The main points of this embodiment are: fully curing the resin; high density of the product obtained under high pressure of molding and higher moisture content of the wet blank of heat setting.
EXAMPLE 3 production of paper-based Runner tube suitable for Steel castings
The paper runner pipe can not be used for steel castings, and even the runner pipe made by Kao corporation and using carbon fiber as a main raw material has insufficient refractoriness, the runner pipe made by the embodiment can meet the use requirement of steel castings at the pouring temperature of 1600 ℃.
The raw materials of the pulping are proportioned as follows: the raw materials comprise the following components in percentage by mass:
waste newspaper: 14 kg; mullite fiber (Al)2O3Content in 72-80%): 80 kg; high aluminum powder: 6 kg;
adding the raw materials into clear water, and crushing and stirring to obtain mixed slurry with the raw material concentration of 0.6%.
The mixed slurry is injected into a mold cavity of a positive pressure forming machine, a plurality of half-pipe forming molds are formed under the action of pressure, and the moisture content of a formed wet blank is about 30 percent.
Drying the wet blank until the water content is 3%, then spraying silica sol with the solid content of 30% on the concave surface of the horizontally placed semi-tube wet blank, wherein the spraying amount is 0.6 times of the weight of the wet blank before spraying, and the water content of the wet blank after spraying is increased to 35%.
[ die cutting, heat setting and curing ] the wet blank impregnated with the silica sol by the spray coating method is transferred into a die cutting and heat setting mold for die cutting, heat setting and curing. The cutter is arranged on the female die, the cutting edge angle is 45 degrees, the height of the exposed surface of the die is 1.7mm (keeping a part of the connection part) and 1.9mm (completely cutting part), the minimum clearance is 1.9mm during the hot pressing set by the heat setting male die and the heat setting female die, and the heat setting pressure is 5 MPa.
[ adhesion ] [ division ] the same as example 1, but omitting.
In this example, a paper-based runner tube mainly composed of an inorganic material and having a silica sol content of about 15%, a paper fiber content of 12%, and a mullite fiber content of approximately 68% was obtained.
Example 4 use of resol as a binder
The raw materials of the pulping are proportioned as follows: the raw materials comprise the following components in percentage by mass:
waste newspaper: 13 kg; high-aluminum fiber: 46 kg; high aluminum powder: 24 kg; cyanite powder: 7 kg;
adding the raw materials into clear water, and crushing and stirring to obtain mixed slurry with the raw material concentration of 0.6%.
The mixed slurry is injected into a slurry tank of a vacuum forming machine, a plurality of half-pipe forming dies are immersed into the slurry tank for vacuum adsorption forming, and the moisture content of a formed wet blank is about 35%.
[ impregnating soluble phenol resin ] the wet green was dried to a water content of 3%, and then immersed in a soluble phenol resin having a solid content of 50% for 20 seconds to increase the water content of the wet green to about 30%.
The wet blank impregnated with the resol is transferred into a die-cutting and heat-setting die to be subjected to die-cutting, heat-setting and curing. The cutter is arranged on the female die, the cutting edge angle is 45 degrees, the height of the exposed surface of the die is 1.7mm (keeping a part of the connection part) and 1.9mm (completely cutting part), the minimum clearance is 1.9mm during the hot pressing set by the heat setting male die and the heat setting female die, and the heat setting pressure is 5 MPa.
The following is omitted.
In this example, a paper runner pipe mainly made of an inorganic material was obtained, in which the content of a resol resin was about 15%, the content of a paper fiber was about 11%, the content of a high alumina fiber was about 39%, and the content of a refractory powder was about 26%.
As shown in fig. 1-12, the paper-based runner pipe prepared in the above embodiment can be well formed, and after actual use by manufacturers, the runner pipe prepared by the present invention can maintain a complete shape after use, and the heat resistance of the runner pipe completely meets the standard after practice and inspection.
Claims (8)
1. A method for manufacturing a paper runner pipe combined by half pipes is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: pulping: crushing and dispersing the raw materials weighed in advance, and pulping by using circulating water to obtain mixed pulp;
step two: molding: injecting the mixed slurry obtained in the step one into a forming machine, and forming a semi-pipe wet blank of at least two pipe fittings connected together at a flange by adopting a negative pressure or positive pressure method;
step three: and (3) drying a wet blank: drying the formed wet blank obtained in the step two until the water content is 0-35%;
step four: die cutting, heat setting and curing: putting the dried formed wet blank into a heat setting die provided with a cutter for die cutting, heat setting and curing to obtain a semi-tube finished product;
step five: bonding: gluing the adhesive surfaces of the two semi-tube finished products, then respectively putting the adhesive surfaces into two semi-molds of a pair of adhesive molds, and aligning the adhesive surfaces accurately and then pressing the adhesive surfaces;
step six: and (3) dividing: and finally cutting the residual joints after die cutting.
2. The method of claim 1, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: the semi-tube finished product comprises the following raw materials in parts by weight: aluminosilicate fibers and/or aluminosilicate fibers: 20-80 parts; paper fiber: 5-30 parts; adhesive: 5-40 parts; refractory powder: 0-60 parts.
3. The method of claim 2, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: the refractory powder is any one or a mixture of two or more than two of high-alumina powder, kyanite powder, crystalline flake graphite powder and the like which are mixed in any proportion.
4. The method of claim 2, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: the adhesive is any one of novolac resin, silica sol and soluble phenolic resin.
5. The method of claim 4, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: the adhesive is novolac resin;
the linear phenolic resin and other raw materials are crushed or dispersed in the first step, and the linear phenolic resin curing agent urotropine is added into the circulating water in the first step;
the concentration of the urotropine is not less than (1-moisture content of the wet blank) and 5 percent of the linear phenolic resin per moisture content of the wet blank;
and drying the wet blank in the third step until the water content is 8-35%.
6. The method of claim 4, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: the adhesive is silica sol or soluble phenolic resin;
the silica sol or the soluble phenolic resin is applied by adopting a spraying or dipping method after the wet blank is dried to the water content of 0-30 percent.
7. The method of claim 1, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: the cutter is arranged on the heat setting concave die, the cutting edge angle of the cutter is 15-60 degrees, and the height of the cutter exposed out of the surface of the die is approximately equal to the minimum clearance set by the heat setting concave-convex die during hot pressing.
8. The method of claim 1, wherein the paper runner tube is formed by combining half tubes, and the method comprises the following steps: and the glue applying in the fifth step adopts a glue rolling method of hot melt glue, the semi-pipe finished product is placed into a mould with the upper and lower surfaces parallel, glue is applied between a glue roller and a press roller of a glue rolling machine, and the mould comprises a hard matrix and an elastic material layer which can be tightly attached to the back surface of the adhesive surface of the semi-pipe finished product.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011645713 | 2020-12-31 | ||
| CN2020116457135 | 2020-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114101589A true CN114101589A (en) | 2022-03-01 |
Family
ID=80380541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111291677.1A Pending CN114101589A (en) | 2020-12-31 | 2021-11-03 | Method for manufacturing paper runner pipe combined by half pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114101589A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117602868A (en) * | 2024-01-22 | 2024-02-27 | 中建八局西南建设工程有限公司 | Slag soil regeneration method and slag soil regeneration material |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2417191Y (en) * | 2000-02-18 | 2001-01-31 | 周自兴 | Non edge cutting and combination type mould for fibre article |
| CN106903025A (en) * | 2015-12-22 | 2017-06-30 | 财团法人金属工业研究发展中心 | The bar apparatus for coating of tool surface adaptability energy |
| CN106930157A (en) * | 2015-12-31 | 2017-07-07 | 郎旗 | A kind of preparation method of paper runner channel pipe |
| CN107529570A (en) * | 2017-09-22 | 2018-01-02 | 广州华工环源绿色包装技术股份有限公司 | A kind of paper pulp model formation machine with automatic trimming |
| CN107774912A (en) * | 2016-08-24 | 2018-03-09 | 郎旗 | A kind of paper runner channel pipe with fin side and preparation method thereof |
| CN109047666A (en) * | 2018-07-27 | 2018-12-21 | 宁夏共享能源有限公司 | A kind of paper pouring channel tube for casting and preparation method thereof |
| CN109353034A (en) * | 2018-12-13 | 2019-02-19 | 郑州大学 | Thermoplasticity is punched hot pressing die and its application method certainly |
| CN111136213A (en) * | 2019-09-21 | 2020-05-12 | 郎旗 | Paper pouring gate pipe for casting and manufacturing method thereof |
| JP2020132511A (en) * | 2019-02-13 | 2020-08-31 | 皇廣鑄造發展股▲ふん▼有限公司Ｔｅｍｃ Ｍｅｔａｌ ＆ Ｃｈｅｍｉｃａｌ Ｃｏｒｐ． | Runner protective tube for casting, and its manufacturing method |
| CN111774534A (en) * | 2020-07-23 | 2020-10-16 | 宝鸡华光铸造材料科技有限公司 | Method for manufacturing paper pouring gate pipe for metal casting |
-
2021
- 2021-11-03 CN CN202111291677.1A patent/CN114101589A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2417191Y (en) * | 2000-02-18 | 2001-01-31 | 周自兴 | Non edge cutting and combination type mould for fibre article |
| CN106903025A (en) * | 2015-12-22 | 2017-06-30 | 财团法人金属工业研究发展中心 | The bar apparatus for coating of tool surface adaptability energy |
| CN106930157A (en) * | 2015-12-31 | 2017-07-07 | 郎旗 | A kind of preparation method of paper runner channel pipe |
| CN107774912A (en) * | 2016-08-24 | 2018-03-09 | 郎旗 | A kind of paper runner channel pipe with fin side and preparation method thereof |
| CN107529570A (en) * | 2017-09-22 | 2018-01-02 | 广州华工环源绿色包装技术股份有限公司 | A kind of paper pulp model formation machine with automatic trimming |
| CN109047666A (en) * | 2018-07-27 | 2018-12-21 | 宁夏共享能源有限公司 | A kind of paper pouring channel tube for casting and preparation method thereof |
| CN109353034A (en) * | 2018-12-13 | 2019-02-19 | 郑州大学 | Thermoplasticity is punched hot pressing die and its application method certainly |
| JP2020132511A (en) * | 2019-02-13 | 2020-08-31 | 皇廣鑄造發展股▲ふん▼有限公司Ｔｅｍｃ Ｍｅｔａｌ ＆ Ｃｈｅｍｉｃａｌ Ｃｏｒｐ． | Runner protective tube for casting, and its manufacturing method |
| CN111136213A (en) * | 2019-09-21 | 2020-05-12 | 郎旗 | Paper pouring gate pipe for casting and manufacturing method thereof |
| CN111774534A (en) * | 2020-07-23 | 2020-10-16 | 宝鸡华光铸造材料科技有限公司 | Method for manufacturing paper pouring gate pipe for metal casting |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117602868A (en) * | 2024-01-22 | 2024-02-27 | 中建八局西南建设工程有限公司 | Slag soil regeneration method and slag soil regeneration material |
| CN117602868B (en) * | 2024-01-22 | 2024-04-09 | 中建八局西南建设工程有限公司 | Slag soil regeneration method and slag soil regeneration material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1757383B1 (en) | Molded body | |
| JP4002200B2 (en) | Papermaking parts for casting production | |
| JP4601531B2 (en) | MANUFACTURING METHOD AND DEVICE FOR FIBER MOLDED ARTICLE, FIBER MOLDING INTERMEDIATE AND FIBER MOLDED | |
| CN107716843B (en) | The structural bodies such as the manufacturing method of structure for casting production and casting mold | |
| CN114101589A (en) | Method for manufacturing paper runner pipe combined by half pipes | |
| CN103103868B (en) | High-performance paper base frication material and preparation technology thereof | |
| CN111015937A (en) | Method for producing laminated floor slab with smooth surface and without slurry leakage | |
| CN108312261B (en) | Regenerated recombined thick-core bamboo plywood and manufacturing method thereof | |
| JP4907326B2 (en) | Casting manufacturing structure and casting manufacturing method | |
| CN104337292A (en) | Frame strip and frame strip producing method | |
| CN211640321U (en) | Wear-resistant composite wood floor | |
| CN110587808A (en) | Production process of heat-preservation and decoration integrated board | |
| JP4407962B2 (en) | Papermaking parts for casting production | |
| CN220539086U (en) | Decorative board | |
| CN219338658U (en) | Carbon fiber shell forming die | |
| CN110732635B (en) | Casting method of wood chip pump lining plate | |
| JP4694347B2 (en) | Manufacturing method of casting mold | |
| CN211564442U (en) | Sand shooting device for automobile brake disc mould | |
| CN208896328U (en) | A kind of tire-mold steel disc Overbridge device | |
| CN100513104C (en) | Medium density thin plate flat pressing method and device for single layer hot press | |
| CN201998280U (en) | Impregnated paper laminated wood floor blank mould-pressing locating slot | |
| CN207841933U (en) | A kind of polychrome mold pins insert structure | |
| JP2007191823A (en) | Fiber molded article for producing cast, method and apparatus for producing the same | |
| JPH07323412A (en) | Pressure casting molding die | |
| JPH0631730A (en) | Manufacture of ligneous forming base material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |