CN109014017A - A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method - Google Patents
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method Download PDFInfo
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- CN109014017A CN109014017A CN201811190100.XA CN201811190100A CN109014017A CN 109014017 A CN109014017 A CN 109014017A CN 201811190100 A CN201811190100 A CN 201811190100A CN 109014017 A CN109014017 A CN 109014017A
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- gypsum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- 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
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/08—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for decreasing shrinkage of the mould, e.g. for investment casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Abstract
The invention discloses a kind of preparation methods based on the natural plant type metal handicrafts for burning mistake method, it is using alpha semi-hydrated gypsum as gypsum mould basis material, gypsum mould surface layer and gypsum mould reinforcing layer in the present invention is using bauxite, kaolin, corundum as gypsum mould filler, these three fillers have the features such as chemical stability is good, linear expansivity is small, and refractoriness and fusing point are high, gas forming amount is few.In roasting, because dihydrate gypsum is gradually dehydrated, phase transformation, the linear shrinkage of gypsum mould is larger, easily cracks, and intensity declines to a great extent.So adding filler in gypsum mixture, to improve the crackle tendency and linear shrinkage of gypsum mould, keep the performance of gypsum mould more stable.The present invention is based on the investment pattern precision casting gypsum moulds for burning mistake method to have the advantages that intensity height, good permeability, at low cost.The present invention is the reproduction that ancient Chinese burns mistake method, is with natural plants directly as prototype, without designing and producing model, metal handicrafts produced has the characteristics that restoration, uniqueness.
Description
Technical field
The present invention relates to hot investment casting fields, more particularly, to a kind of based on the natural plant type metal handicrafts for burning mistake method
Preparation method.
Background technique
It burns mistake method to be also known as lost pattern casting or lose rope casting, is a kind of block mold technique, use can burn the material of mistake, such as restrict
Rope, beeswax, starch etc are moulded, and are coated with outside model material (refractory mix), and the whole model block without parting line is formed, and are delayed
Slowly after drying in the shade, entering kilning and roast, the ashes of mould melted by heat or burning can be discharged from cast gate, i.e., and it is pourable, and obtain without model line
Cord-like bale handle, such as the river Pinggu County, beijing Liu Jia in 1977 be unearthed quotient's mid-term ewer with a loop handle.It burns mistake method and sees evening in the Shang dynasty earliest
Phase, the implements for making no model line are the origins of ancient Chinese lost-wax casting technology, and this technology occurs in no model line lost-wax process
It gradually withers away later.Burning the casting of mistake method and solving certain can not be not only lost-wax casting with the molding technical difficulty of combination block model
One much progress of technology early forms and foundry engieering, this advanced technology that quotient's mid-term occurs are cast in Chinese precision-investment
It makes significant in history.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods based on the natural plant type metal handicrafts for burning mistake method, originally
Invention is the reproduction that ancient Chinese burns mistake method, is produced directly as prototype without designing and producing model with the natural original
Metal handicrafts have the characteristics that restoration, uniqueness.
The object of the present invention is achieved like this:
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, be characterized in: specific step is as follows:
A, natural plants prototype selects: select the natural plants of aesthetic for prototype, the size of natural plants prototype:
Length is no more than 300mm, and for the wall thickness of natural plants between 1-60mm, thickness should be not less than 1mm, if excessively thin, is formed
Gypsum mould type chamber very little, the defects of when deashing is relatively difficult, and when casting is also easy to produce misrun；Thickness is not more than 60mm, wall mistake
The defects of thickness, casting metal is also easy to produce contraction when solidifying；
B, prepare gypsum mould surface layer solid powder (gypsum and filler): alpha semi-hydrated gypsum is basis material, bauxite, kaolin,
Corundum is filler；Take 30-50 parts of alpha semi-hydrated gypsum, 10-20 parts of bauxite, 10-20 parts of kaolin, 10-20 parts of corundum, α type half
Water gypsum, bauxite, kaolin, corundum granularity in 200-300 mesh, by alpha semi-hydrated gypsum, bauxite, kaolin, corundum
It is uniformly mixed, obtains surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, water 30-50 parts is added in solid powder, be uniformly mixed,
Surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in natural plants prototype, and gypsum mould surface layer is made；
D, gypsum mould face formable layer: using natural plants as prototype, directly natural plants prototype is embedded in gypsum mould surface layer, one
Secondary roasting, making the combustion of the natural original is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from splitting
Gypsum mould surface layer is pried open at line, after clearing up residual ash, then gypsum mould surface layer is repaired and is restored；
E, prepare gypsum mould reinforcing layer solid powder (gypsum and filler): alpha semi-hydrated gypsum is basis material, bauxite, kaolinite
Soil, corundum are filler；Take 30-50 parts of alpha semi-hydrated gypsum, 10-30 parts of bauxite, 10-30 parts of kaolin, 10-30 parts of corundum, α
Type semi-hydrated gypsum, bauxite, kaolin, corundum granularity in 80-120 mesh, by alpha semi-hydrated gypsum, bauxite, kaolin,
Corundum is uniformly mixed, and obtains reinforcing layer solid powder；
F, it prepares reinforcing layer additive: taking 30-50 parts of silica solution (industrial model S-40), 50-100 parts are added in silica solution
Water, be added 1-3 part sodium chloride (for industrial sodium chloride nacl >=95%), be uniformly mixed, sufficiently dissolution, obtain reinforcing layer and add
Add agent, it is spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, reinforcing layer addition is added in reinforcing layer solid powder
It 30-50 parts of agent, is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry
It is wrapped on the gypsum mould surface layer of reparation outside, gypsum mould reinforcing layer is made, carry out after baking；
H, natural plant type metal handicrafts forms: last smelting metal, after casting is cooling, clears up gypsum mould, casts natural plant
Object type metal handicrafts.
Natural plants prototype in step A is the natural plants such as spray, rotten wood, the pinecone, corn, grape, strawberry.
Working principle:
Gypsum mould surface layer is added without any additive, and the intensity of gypsum mould surface layer is low, easy to crack, therefore is easier to break apart, and is convenient for
Residual ashes after clearing up prototype high temperature；Gypsum mould reinforcing layer can be improved gypsum mould and add using silica solution, sodium chloride as additive
Gu the intensity of layer enhances gas permeability, the cracking of gypsum mould reinforcing layer is effectively prevented.
During being blended gypsum mould slurry, using water as curing agent, hydration reaction occurs for gypsum and water:
Silica solution, sodium chloride this two kinds of additives is added preparing gypsum mould reinforcing layer, sodium chloride is strong electrolyte, electrolyte
Addition reduces the current potential of silica sol particle, while removing the solvation film of silica sol particle；Silica solution is silicic acid molecule molten
A kind of colloidal solution made of gradually polymerization is big in liquid, silicic acid molecule are combined with each other to form long-chain molecule, and long-chain molecule into
One step is crosslinked mutually, forms reticular structure Silica hydrogel.
It chemically reacts as follows:
2H4SiO4⇌H6Si2O7+ H2O
H4SiO4+H6Si2O7⇌H8Si3O10+ H2O
The particle dehydration at high temperature in roasting process, Silica hydrogel discontinuously can be condensed to form Si-O-Si key, have system
Certain rigidity improves the intensity of gypsum mould reinforcing layer.
It chemically reacts as follows:
H4SiO4= SiO2 +2H2O
H6Si2O7= 2SiO2 +3H2O
H8Si3O10= 3SiO2 +4H2O。
The present invention is that directly natural plants prototype is embedded in gypsum mould surface layer using natural plants as prototype, primary to roast
It burns, making natural plants combustion is ashes, is formed as prototype shape cavity, after breaking the residual ash of gypsum mould surface layer cleaning, then by gypsum mould surface layer
Repairing reduction, then makes gypsum mould reinforcing layer, assembles dead head, after baking, and smelting metal after casting is cooling, clears up stone
Paste type finally casts natural plant type metal handicrafts.It is this with natural plants directly as prototype, without carving great master's design
Prototype, casting out metal handicrafts has the characteristics that moulding is true to nature, uniqueness.
The present invention is substituted using modern investment pattern precision casting gypsum mould to burn mistake method as base and makes traditional chamotte mould model block.Fusible pattern essence
Cast stone paste type, which refers to, produces fusible pattern with required part shape and adjoining dimensions using fusible material, records casting with gypsum slurry
Type, after drying, dewaxing, roasting be pourable casting method.Gypsum mixture based on semi-hydrated gypsum, filler, additive,
The cast(ing) surface cast out is smooth, and surface smoothness is high, and replication capacity is good, can obtain shape fineness, the decorative pattern clearly art work.
The present invention is that the gypsum mould surface layer using alpha semi-hydrated gypsum as gypsum mould basis material, in the present invention adds with gypsum mould
Gu layer, using bauxite, kaolin, corundum as gypsum mould filler, these three fillers are good with chemical stability, linear expansivity is small,
The features such as refractoriness and fusing point are high, gas forming amount is few.In roasting, because dihydrate gypsum is gradually dehydrated, phase transformation, the linear shrinkage of gypsum mould
It is larger, it easily cracks, and intensity declines to a great extent.So adding filler, in gypsum mixture to improve splitting for gypsum mould
Line tendency and linear shrinkage, keep the performance of gypsum mould more stable.
Therefore, the present invention is based on the investment pattern precision casting gypsum moulds for burning mistake method to have intensity height, good permeability, at low cost excellent
Point.The present invention is the reproduction that ancient Chinese burns mistake method, is with natural plants directly as prototype, without designing and producing model,
Metal handicrafts produced has the characteristics that restoration, uniqueness.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the schematic diagram that natural plants prototype is natural rotten wood；
Fig. 3 is the flow diagram that natural plants prototype is rotten wood brass craftwork；
Fig. 4 is the flow diagram that natural plants prototype is spray aluminium alloy craftwork；
Fig. 5 is the flow diagram that natural plants prototype is corn aluminium alloy craftwork；
Fig. 6 is the flow diagram that natural plants prototype is pinecone brass craftwork；
Fig. 7 is the flow diagram that natural plants prototype is grape, strawberry aluminium alloy craftwork.
Specific embodiment
It below with reference to embodiment and compares attached drawing the present invention is further elaborated, it should be noted that based on mistake method is burnt
The gypsum mould of natural plant type metal handicrafts includes: solid powder (gypsum and filler), additive, curing agent: water, following
Kind material is technical pure.
Embodiment 1:
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, the specific steps are as follows:
A, the selection of natural plants prototype: rotten wood, size are about 220 × 80 × 40mm, wall thickness 3-25mm；
B, it prepares gypsum mould surface layer solid powder (gypsum and filler): taking 50 parts of alpha semi-hydrated gypsum, 20 parts of bauxite, kaolin
20 parts, 10 parts of corundum, alpha semi-hydrated gypsum, bauxite, kaolin, corundum granularity in 200 mesh, by alpha semi-hydrated gypsum, fill out
Expect that (bauxite, kaolin, corundum) is uniformly mixed, obtains surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, be added 50 parts of water in surface layer solid powder, mixing is equal
It is even, surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in rotten wood prototype, and gypsum mould surface layer is made；
D, gypsum mould face formable layer: using natural plants as prototype, directly natural plants prototype is embedded in gypsum mould surface layer, one
Secondary roasting, making the combustion of the natural original is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from splitting
Gypsum mould surface layer is pried open at line, after clearing up residual ash, then gypsum mould surface layer is repaired and is restored；
E, it prepares gypsum mould reinforcing layer solid powder (gypsum and filler): taking 50 parts of alpha semi-hydrated gypsum, 30 parts of bauxite, kaolinite
Native 30 parts, 10 parts of corundum, alpha semi-hydrated gypsum, bauxite, kaolin, corundum granularity alpha semi-hydrated gypsum is filled out in 80 mesh
Expect that (bauxite, kaolin, corundum) is uniformly mixed, obtains reinforcing layer solid powder；
F, it prepares reinforcing layer additive: taking 50 parts of silica solution (industrial model S-40), 50 parts of water is added, 1 part of chlorination is added
Sodium (for industrial sodium chloride nacl >=95%) is uniformly mixed, and is sufficiently dissolved, is obtained reinforcing layer additive, spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, reinforcing layer additive is added in reinforcing layer solid powder
It 50 parts, is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry are wrapped up in outside
On the gypsum mould surface layer of reparation, gypsum mould reinforcing layer is made, carries out after baking；
H, natural plant type metal handicrafts forms: melting brass, after casting is cooling, clears up gypsum mould, casts rotten wood brass work
Skill product, as shown in Figure 2 and Figure 3.
Embodiment 2:
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, the specific steps are as follows:
A, the selection of natural plants prototype: corn, size are about 250 × 50 × 45mm, wall thickness 10-50mm；
B, it prepares gypsum mould surface layer solid powder (gypsum and filler): taking 30 parts of alpha semi-hydrated gypsum, 10 parts of filler bauxite, height
Ridge soil 10 parts, 20 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 200 mesh, by half water of α type
Gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, 30 parts of water are added in surface layer solid powder, mixing is equal
It is even, surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in corn prototype, and gypsum mould surface layer is made；
D, gypsum mould face formable layer: using natural plants as prototype, directly natural plants prototype is embedded in gypsum mould surface layer, one
Secondary roasting, making the combustion of the natural original is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from splitting
Gypsum mould surface layer is pried open at line, after clearing up residual ash, then gypsum mould surface layer is repaired and is restored；
E, prepare gypsum mould reinforcing layer solid powder (gypsum and filler): take 30 parts of alpha semi-hydrated gypsum, 20 parts of filler bauxite,
20 parts of kaolin, 20 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 100 mesh, by α type half
Water gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain reinforcing layer solid powder；
F, it prepares reinforcing layer additive: taking 30 parts of silica solution (industrial model S-40), 80 parts of water is added, 1.5 parts of chlorine are added
Change sodium (for industrial sodium chloride nacl >=95%), be uniformly mixed, sufficiently dissolves, obtain reinforcing layer additive, it is spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, be added 30 parts of reinforcing layer additive in solid powder,
It is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry are wrapped in reparation outside
Gypsum mould surface layer on, be made gypsum mould reinforcing layer, carry out after baking；
H, natural plant type metal handicrafts forms: smelting aluminium alloy, after casting is cooling, clears up gypsum mould, casts the conjunction of spray aluminium
Gold process product, as shown in Figure 4.
Embodiment 3:
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, the specific steps are as follows:
A, the selection of natural plants prototype: spray, size are about 100 × 90 × 30mm, wall thickness 1-3mm；
B, it prepares gypsum mould surface layer solid powder (gypsum and filler): taking 40 parts of alpha semi-hydrated gypsum, 20 parts of filler bauxite, height
Ridge soil 10 parts, 20 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 300 mesh, by half water of α type
Gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, 40 parts of water are added in surface layer solid powder, mixing is equal
It is even, surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in spray prototype, and gypsum mould surface layer is made；
D, natural plants prototype: using natural plants as prototype, being directly embedded in gypsum mould surface layer by gypsum mould face formable layer,
Primary roasting, making natural original combustion is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from
Cracks pry open gypsum mould surface layer, after clearing up residual ash, then gypsum mould surface layer are repaired and is restored；
E, prepare gypsum mould reinforcing layer solid powder (gypsum and filler): take 40 parts of alpha semi-hydrated gypsum, 20 parts of filler bauxite,
20 parts of kaolin, 30 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 120 mesh, by α type half
Water gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain reinforcing layer solid powder；
F, it prepares reinforcing layer additive: taking 40 parts of silica solution (industrial model S-40), 100 parts of water is added, 2 parts of chlorine are added
Change sodium (for industrial sodium chloride nacl >=95%), be uniformly mixed, sufficiently dissolves, obtain reinforcing layer additive, it is spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, be added 40 parts of reinforcing layer additive in solid powder,
It is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry are wrapped in reparation outside
Gypsum mould surface layer on, be made gypsum mould reinforcing layer, carry out after baking；
H, natural plant type metal handicrafts forms: smelting aluminium alloy, after casting is cooling, clears up gypsum mould, casts the conjunction of corn aluminium
Gold process product, if Fig. 5 is shown.
Embodiment 4:
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, the specific steps are as follows:
A, the selection of natural plants prototype: the pinecone, size are about 60 × 60 × 90mm, wall thickness 1-3mm；
B, it prepares gypsum mould surface layer solid powder (gypsum and filler): taking 45 parts of alpha semi-hydrated gypsum, 13 parts of filler bauxite, height
Ridge soil 17 parts, 15 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 250 mesh, by half water of α type
Gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, 45 parts of water are added in surface layer solid powder, mixing is equal
It is even, surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in pinecone prototype, and gypsum mould surface layer is made；
D, prepare gypsum mould reinforcing layer solid powder (gypsum and filler): take 45 parts of alpha semi-hydrated gypsum, 15 parts of filler bauxite,
15 parts of kaolin, 15 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 100 mesh, by α type half
Water gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain reinforcing layer solid powder；
E, natural plants prototype: using natural plants as prototype, being directly embedded in gypsum mould surface layer by gypsum mould face formable layer,
Primary roasting, making natural original combustion is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from
Cracks pry open gypsum mould surface layer, after clearing up residual ash, then gypsum mould surface layer are repaired and is restored；
F, it prepares reinforcing layer additive: taking 50 parts of silica solution (industrial model S-40), 70 parts of water is added, 2.5 parts of chlorine are added
Change sodium (for industrial sodium chloride nacl >=95%), be uniformly mixed, sufficiently dissolves, obtain reinforcing layer additive, it is spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, be added 45 parts of reinforcing layer additive in solid powder,
It is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry are wrapped in reparation outside
Gypsum mould surface layer on, be made gypsum mould reinforcing layer, carry out after baking；
H, natural plant type metal handicrafts forms: melting brass, after casting is cooling, clears up gypsum mould, casts pinecone brass work
Skill product, if Fig. 6 is shown.
Embodiment 5:
A kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, the specific steps are as follows:
A, the selection of natural plants prototype: grape, size are about 100 × 30 × 35mm, wall thickness 1-12mm；Strawberry, size are about
30 × 30 × 25mm, wall thickness 1-30mm；
B, it prepares gypsum mould surface layer solid powder (gypsum and filler): taking 35 parts of alpha semi-hydrated gypsum, 15 parts of filler bauxite, height
Ridge soil 15 parts, 15 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 300 mesh, by half water of α type
Gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, 35 parts of water are added in surface layer solid powder, mixing is equal
It is even, surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in pinecone prototype, and gypsum mould surface layer is made；
D, prepare gypsum mould reinforcing layer solid powder (gypsum and filler): take 50 parts of alpha semi-hydrated gypsum, 30 parts of filler bauxite,
30 parts of kaolin, 30 parts of corundum, alpha semi-hydrated gypsum, filler bauxite, kaolin, corundum granularity in 120 mesh, by α type half
Water gypsum, filler (bauxite, kaolin, corundum) are uniformly mixed, and obtain reinforcing layer solid powder；
E, natural plants prototype: using natural plants as prototype, being directly embedded in gypsum mould surface layer by gypsum mould face formable layer,
Primary roasting, making natural original combustion is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from
Cracks pry open gypsum mould surface layer, after clearing up residual ash, then gypsum mould surface layer are repaired and is restored；
F, it prepares reinforcing layer additive: taking 45 parts of silica solution (industrial model S-40), 90 parts of water is added, 3 parts of chlorinations are added
Sodium (for industrial sodium chloride nacl >=95%) is uniformly mixed, and is sufficiently dissolved, is obtained reinforcing layer additive, spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, be added 45 parts of reinforcing layer additive in solid powder,
It is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry are wrapped in reparation outside
Gypsum mould surface layer on, be made gypsum mould reinforcing layer, carry out after baking；
H, natural plant type metal handicrafts forms: smelting aluminium alloy, after casting is cooling, clears up gypsum mould, casts grape, grass
Certain kind of berries aluminium alloy craftwork.As shown in fig. 7, having carried out spray painting simulation process for grape and wherein two strawberries.
Claims (2)
1. a kind of preparation method based on the natural plant type metal handicrafts for burning mistake method, it is characterised in that: specific step is as follows:
A, natural plants prototype selects: select the natural plants of aesthetic for prototype, the size of natural plants prototype:
Length is no more than 300mm, and for the wall thickness of natural plants between 1-60mm, thickness should be not less than 1mm, if excessively thin, is formed
Gypsum mould type chamber very little, the defects of when deashing is relatively difficult, and when casting is also easy to produce misrun；Thickness is not more than 60mm, wall mistake
The defects of thickness, casting metal is also easy to produce contraction when solidifying；
B, prepare gypsum mould surface layer solid powder: alpha semi-hydrated gypsum is basis material, and bauxite, kaolin, corundum are filler；
Take 30-50 parts of alpha semi-hydrated gypsum, 10-20 parts of bauxite, 10-20 parts of kaolin, 10-20 parts of corundum, alpha semi-hydrated gypsum, aluminium alum
Soil, kaolin, corundum granularity in 200-300 mesh, alpha semi-hydrated gypsum, bauxite, kaolin, corundum are uniformly mixed, obtained
To surface layer solid powder；
C, it prepares gypsum mould surface layer: taking 100 parts of surface layer solid powder, water 30-50 parts is added in solid powder, be uniformly mixed,
Surface layer gypsum mould slurry is formed, vacuum tank slurry is outer to be wrapped in natural plants prototype, and gypsum mould surface layer is made；
D, gypsum mould face formable layer: using natural plants as prototype, directly natural plants prototype is embedded in gypsum mould surface layer, one
Secondary roasting, making the combustion of the natural original is ashes, is formed as prototype shape cavity, and gypsum mould surface layer is easy to crack after primary roasting, from splitting
Gypsum mould surface layer is pried open at line, after clearing up residual ash, then gypsum mould surface layer is repaired and is restored；
E, prepare gypsum mould reinforcing layer solid powder: alpha semi-hydrated gypsum is basis material, and bauxite, kaolin, corundum are to fill out
Material；Take 30-50 parts of alpha semi-hydrated gypsum, 10-30 parts of bauxite, 10-30 parts of kaolin, 10-30 parts of corundum, alpha semi-hydrated gypsum,
Bauxite, kaolin, corundum granularity in 80-120 mesh, alpha semi-hydrated gypsum, bauxite, kaolin, corundum are mixed equal
It is even, obtain reinforcing layer solid powder；
F, it prepares reinforcing layer additive: taking 30-50 parts of silica solution of industrial model S-40,50-100 is added in silica solution
The water of part, is added 1-3 parts of sodium chloride of industrial sodium chloride nacl >=95%, is uniformly mixed, and sufficiently dissolves, obtains reinforcing layer and add
Add agent, it is spare；
G, it prepares gypsum mould reinforcing layer: taking 100 parts of reinforcing layer solid powder, reinforcing layer addition is added in reinforcing layer solid powder
It 30-50 parts of agent, is uniformly mixed, forms reinforcing layer gypsum mould slurry；Design and assembly dead head, vacuum tank reinforcing layer gypsum mould slurry
It is wrapped on the gypsum mould surface layer of reparation outside, gypsum mould reinforcing layer is made, carry out after baking；
H, natural plant type metal handicrafts forms: last smelting metal, after casting is cooling, clears up gypsum mould, casts natural plant
Object type metal handicrafts.
2. the preparation method according to claim 1 based on the natural plant type metal handicrafts for burning mistake method, feature exist
In: natural plants prototype in step A be spray, rotten wood, the pinecone, corn, grape, strawberry these natural plants.
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