CN1177533A - Embossed decorative plate frame of polyurethane and method for making mould thereof - Google Patents
Embossed decorative plate frame of polyurethane and method for making mould thereof Download PDFInfo
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- CN1177533A CN1177533A CN 97107104 CN97107104A CN1177533A CN 1177533 A CN1177533 A CN 1177533A CN 97107104 CN97107104 CN 97107104 CN 97107104 A CN97107104 A CN 97107104A CN 1177533 A CN1177533 A CN 1177533A
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Abstract
The present invention relates to a polyurethane relief plate frame mould forming process and its manufacturing method for same. Said mould-forming process includes the following steps: spray-coating and applying clay skin to model; spreading gypsum slurry on the clay skin applied on the model; romoving model and tearing off the clay skin from model; don't correct gypsum mouldi preparing silica gel mould material; making mould; removing gypsum outer mould and making polyurethane mould carrier. The manufacturing method of polyurethane relief plate frame includes: making back plate, making gypsum core plate, applying releasing agent to the mould, preparing polyurethane foaming material, injecting mould, pressing back plate with gypsum core plate on the silica gel mould, closing mould, curing and demoulding, and finishing product.
Description
What embossed decorative plate frame of polyurethane of the present invention and mould making method thereof related to is the backboard one-piece forming technique of a kind of polyurethane (PU) foaming raised table, frame mould moulding process and polyurethane foam raised table, frame and embossment sheet frame.Affiliated technical field is applicable to light industry, industrial art, building materials.
Polyurethane foam material (PU) is applied to bossage line plate and more original woodwork of escutcheon based article and plastering, and it is clear to have an any surface finish decorative pattern, fast, the impact-resistant characteristics of intensity high efficiency in light weight.But owing to polyurethane foaming body is compared with the timber of equal value, its nail-holding ability, the creep resistance of lock seaming resistance to impact, clothes-hook load-bearing is all good not as good as log.But in order to utilize the foaming body model forming, work efficiency is higher and nail-holding power is strong, the advantage manufacturer that creep resistance is good often is used in combination two kinds of materials, be that decorative pattern is partly used polyurethane foaming body, tongue and groove backboard etc. is eaten the nail part and is then adopted natural or artificial material, and modification was serious when these two kinds of materials caused once-combined moulding owing to its heat effect is different with constriction coefficient when moulding, the moulding respectively of often having to, and then revise nail joint and splicing so that increase operation, strengthen cost.
The objective of the invention is to have weak point at existing embossed decorative plate frame of polyurethane forming process, a kind of embossed decorative plate frame of polyurethane and mould making method thereof are provided, with three kinds of once-combined moulding of inhomogeneous material, bright and clean decorative pattern fine definition of polyurethane foam relief surface and quick shaping process have been kept, combine the nail-holding ability of wood substrate and the superperformance of clothes-hook intensity again, overcome the shortcoming of the multiple tracks subsequent handling that insoluble contraction distortion phenomenon of one-shot forming and post forming caused.
Embossed decorative plate frame of polyurethane and mould making method thereof take following scheme to realize: embossed decorative plate frame of polyurethane and mould making method thereof comprise the embossed decorative plate frame of polyurethane mould molding process, the embossed decorative plate frame of polyurethane preparation method.Make polyurethane bossage line plate and escutcheon based article and at first will make polyurethane decoration plate with relief sculpture, frame mould, utilize Mold Making polyurethane decoration plate with relief sculpture, frame again.
The embossed decorative plate frame of polyurethane mould molding process:
1, is ready to model before the Mold Making earlier and also claims female parent, make maternal material and can use timber, gypsum, resin mold etc.Maternal surface must be bright and clean smooth, no open defect.
2, revising on the good model (female parent), with polyester varnish its surface spray 1-2 time, with increase the fineness of model surface, make do mould inner wall bright and clean more smooth.
3, according to product-forming and production quantity, with refining good pottery mud, resembling and roll system musculus cutaneus sample, roll into the thick mud skin of 2-8mm, be divided into the wide mud bar of 1-4cm by the certain orientation order successively along with the convex-concave of embossment, decorative pattern, apply ointment or plaster at model surface, the good thickness of GPRS is consistent as far as possible when applying ointment or plaster, and is coated with the dense liquid soap of last layer on the mud skin that posts uniformly.
4, model is after posting the mud skin, just can above calcium plaster, get a container and put water, land plaster is sprinkled in the water uniformly, up to land plaster install to can not see water till.Slightly static treat that land plaster soaks into moisture content after, begin again to stir and rapidly calcium plaster is splashed on the mud skin of model, thickness is looked product and differently is advisable at 1.5-5cm, as to increase gypsum external mold intensity can be in land plaster fusion 20-30% (weight ratio) white cement or in calcium plaster, be blended into the fiber of 4-10% (weight ratio).Can both strengthen external mold intensity and service life.
5, after treating 10-15 minute, treat that the gypsum heating gets final product the demoulding, carry out plaster mold and pattern board alignment mark before the demoulding earlier, carefully take the mud skin that is attached on the model then off, profile in plaster mold, repair bright and clean, stamp demoulding wax, and, open 1-2 the charge door that 3-6cm is square in the higher point of this gypsum external mold, on all the other embossment peaks, get out the steam vent of diameter 3-4mm, more than work ready after, can be with the gypsum external mold alignment mark during according to molding, reset on the model of cleaning out, for preventing that running material uses the calcium plaster caulking joint between gypsum external mold and pattern board, with the whole good pattern die that resets, 30 degree that tilt are put, and notice that charging aperture should be aloft.
6, after the model model is handled well, by formula rate and preparation technology's requirement that silica gel is deployed, the silica gel mould material prescription is a mould silica gel: curing agent=100: 1～5 (component weight ratio), mould silica gel can adopt DOW CORNING mould silica gel, curing agent can adopt di lauric dibutyl alkene, consumption should be decided on actual needs, in allocation process, to stir sizing material with homogenizer, curing agent and silica gel are fully mixed thoroughly, put into vacuum (-tight) housing and take out wherein bubble, getting rid of the bubble time is 5～10 minutes.After stirring, wants sizing material timely molding, the mode of glue with drip is poured in the charge door of the high-order bit of model, 30～90 minutes operating times, allow it trickle naturally and be covered with whole model, along with the gas in the trickling die cavity of glue is progressively discharged by steam vent, when overflowing, glue illustrates that this position glue has been full of die cavity from steam vent, can block up the steam vent of the glue that overflows with pottery mud, till the full whole die cavity of glue stream, about 2-4 hour glue tentatively solidifies, left standstill 6-12 hour, treat that its curing fully gets final product the demoulding, colloid solidifies fully needs 7 2～168 hours, still can drop into normal use, after silica gel mould is finished, manage to make do the hand-made polyurethane die shoe of doing.
Should scalp edge sealing material on every side earlier successively when 7, sloughing the gypsum external mold, and then prize the gypsum external mold gently, treat that it takes off whole gypsum external mold more gently when all loosening, whole process is as the criterion with not loosening rubber moulding and model (female parent).
8, take off the gypsum external mold after, promptly make on the model of rubber moulding (female parent) base plate with clamping plate around impale rubber moulding is trapped among in the middle of, make wooden frame, wooden frame should exceed mould peak 2-4cm and will the maintenance level.
The polyurethane die shoe material that 9, will quantitatively mix up; be poured on rapidly and uniformly on the colloid mould in the wooden frame, and cover base plate or plastic sheeting rapidly, push the clapper die spotting press increased pressure board and cover completely and treat its foaming; polyurethane foam finished in about 6-25 minute, can open clapper die spotting press and take out unitary mould.
Polyurethane die shoe material prescription is acetyl acid esters (PAP1): combined polyether=1～1.5: 1～2 (component weight ratio), and add catalyst, and catalyst adds 0.02～0.03 gram for per 1 kilogram by gross weight, stirs, and catalyst can adopt stannous octoate.
10, the demoulding: after treating the cooling of polyurethane foam die shoe, can take off die shoe gently, from model (female parent), take off the silica gel mould gently successively, note firmly not pullling or prizing rubber moulding firmly in order to avoid destroy maternal moulding, model behind the mold removal (female parent) can be cleaned out, keep and treat to use next time, production mould preparation work is so far all finished, and next step will carry out embossed decorative plate frame of polyurethane and make production.
The embossed decorative plate frame of polyurethane preparation method:
1, makes backboard: according to the product design requirement, can select various natural wood, glued board, wood-based plate, plastic plate, inorganic clad plate for use, as the backboard of embossment sheet frame.The making of backboard is different because of product, but must match with the tongue and groove that is connected of silica gel mould, in order to avoid during polyurethane foam, produce leakage phenomenon.
2, make the gypsum central layer: make soft or dental stone central layer production mould by designing requirement, the ratio of land plaster and water should be controlled between 1.2～1.5: 1 (the component weight ratio) during the modulation calcium plaster, mixing mixing time should be controlled at about 1～3 minute, for increasing central layer intensity, can add 3～5% (accounting for the percentage of gypsum central layer gross weight), long short glass fiber silk and the interpolation of 2-3mm accounts for gypsum central layer gross weight 2%～8% polyvinyl alcohol aqueous solvent, be poured into mould, wipe off with scraper plate, got final product molding in 5-20 minute, after placement is dried, by dimensional requirement and backboard is gluing or stitching is integral.
3, coating release agent: at first that mold cleaning is clean before the injection molding, in mold cavity, spray releasing agent.
4, injection molding: preparation polyurethane foam material, the polyurethane foam material formula is acetyl acid esters (PAP1): combined polyether=1～1.5: 1～2 (component weight ratio), add 5 ‰～1% distilled water by gross weight, preparation technology is 1) take by weighing the each component material respectively, pour a container into, 2) be that 3000 rev/mins spiral agitator stirred for 6～12 seconds with rotating speed, mixing of materials is even.
Polyurethane material dosing after mixing is injected in the embossed decorative plate frame of polyurethane mould fast, and the mould temperature keeps the 35-40 degree.
5, mold closing:
The previously prepared backboard embedding that the gypsum central layer is housed is pressed on the silica gel mould, sends into clapper die spotting press, the locking mould.
6, slaking:
Under 120 degree-180 degree, kept 6-15 minute.
7, the demoulding:
Treat that embossed decorative plate frame of polyurethane solidifies the back and takes out from rubber moulding, mold cleaning is clean, and be cooled to the 40-50 degree.
8, carry out deburring after the embossed decorative plate frame of polyurethane depanning, arrangement again through surface treatment, is finished product after the assay was approved.
Embossed decorative plate frame of polyurethane and mould making method thereof are made and are gone up the skill advanced person, backboard, gypsum central layer, three kinds of inhomogeneous materials of polyurethane embossment foaming decoration plate are passed through the once-combined moulding of mould, the embossed decorative plate frame of polyurethane of making is than woodwork, plastering, have surface smoothness, decorative pattern is clear, in light weight, intensity is high, the energy rapid shaping, work efficiency is fast, and is shock-resistant; Also have the nail-holding ability of wood substrate and the superperformance of clothes-hook intensity, and overcome the shortcoming of the multiple tracks subsequent handling that one-shot forming insoluble embossed decorative plate frame of polyurethane contraction distortion phenomenon and post forming caused, process time, short cost was low.
Embodiment 1:
Process on the embossed decorative plate frame of polyurethane mould molding:
1, is ready to model before the Mold Making earlier and also claims female parent, make maternal material and can use timber, gypsum, resin mold etc.Maternal surface must be bright and clean smooth, no open defect.
2, revising on the good model (female parent), with polyester varnish its surface spray 1-2 time, with increase the fineness of model surface, make do mould inner wall bright and clean more smooth.
3, according to product-forming and production quantity, with refining good pottery mud, resembling and roll system musculus cutaneus sample, roll into the thick mud skin of 2-8mm, be divided into the wide mud bar of 1-4cm by the certain orientation order successively along with the convex-concave of embossment, decorative pattern, apply ointment or plaster at model surface, the good thickness of GPRS is consistent as far as possible when applying ointment or plaster, and is coated with the dense liquid soap of last layer on the mud skin that posts uniformly.
4, model is after posting the mud skin, just can above calcium plaster, get a container and put water, land plaster is sprinkled in the water uniformly, up to land plaster install to can not see water till.Slightly static treat that land plaster soaks into moisture content after, begin again to stir and rapidly calcium plaster splashed on the mud skin of model, thickness is looked product and differently is advisable at 1.5-5cm, as increasing the white cement that gypsum external mold intensity can fusion 25% (weight ratio) in land plaster.Can strengthen external mold intensity and service life.
5, after treating 12 minutes, treat that the gypsum heating gets final product the demoulding, carry out plaster mold and pattern board alignment mark before the demoulding earlier, carefully take the mud skin that is attached on the model then off, profile in plaster mold, repair bright and clean, stamp demoulding wax, and, open 1-2 the charge door that 3-6cm is square in the higher point of this gypsum external mold, on all the other embossment peaks, get out the steam vent of diameter 3-4mm, more than work ready after, can be with the gypsum external mold alignment mark during according to molding, reset on the model of cleaning out, for preventing that running material uses the calcium plaster caulking joint between gypsum external mold and pattern board, with the whole good pattern die that resets, 30 degree that tilt are put, and notice that charging aperture should be aloft.
6, after the model model is handled well, by formula rate and preparation technology's requirement that silica gel is deployed, the silica gel mould material prescription is a mould silica gel: curing agent=100: 1 (component weight ratio), mould silica gel can adopt DOW CORNING mould silica gel, and curing agent can adopt di lauric dibutyl alkene, in allocation process, to stir sizing material with homogenizer, curing agent and silica gel are fully mixed thoroughly, put into vacuum (-tight) housing and take out wherein bubble, getting rid of the bubble time is 5 minutes.After stirring, wants sizing material timely molding, the mode of glue with drip is poured in the charge door of the high-order bit of model, 40 minutes operating times, allow it trickle naturally and be covered with whole model, along with the gas in the trickling die cavity of glue is progressively discharged by steam vent, when overflowing, glue illustrates that this position glue has been full of die cavity from steam vent, can block up the steam vent of the glue that overflows with pottery mud, till the full whole die cavity of glue stream, glue tentatively solidified in about 3 hours, left standstill 8 hours, treat that its curing fully gets final product the demoulding, colloid solidifies fully needs 168 hours, still can drop into normal use, after silica gel mould is finished, manage to make do the hand-made polyurethane die shoe of doing.
Should scalp edge sealing material on every side earlier successively when 7, sloughing the gypsum external mold, and then prize the gypsum external mold gently, treat that it takes off whole gypsum external mold more gently when all loosening, whole process is as the criterion with not loosening rubber moulding and model (female parent).
8, take off the gypsum external mold after, promptly make on the model of rubber moulding (female parent) base plate with clamping plate around impale rubber moulding is trapped among in the middle of, make wooden frame, wooden frame should exceed mould peak 2cm and will the maintenance level.
The polyurethane die shoe material that 9, will quantitatively mix up; be poured on rapidly and uniformly on the colloid mould in the wooden frame, and cover base plate or plastic sheeting rapidly, push the clapper die spotting press increased pressure board and cover completely and treat its foaming; polyurethane foam finished in about 10 minutes, can open clapper die spotting press and take out unitary mould.
Polyurethane die shoe material prescription is acetyl acid esters (PAP1): combined polyether=1: 1.5 (component weight ratio), and add catalyst, and catalyst adds 0.02 gram for per 1 kilogram by gross weight, stirs, and catalyst can adopt stannous octoate.
10, the demoulding: after treating the cooling of polyurethane foam die shoe, can take off die shoe gently, from model (female parent), take off the silica gel mould gently successively, note firmly not pullling or prizing rubber moulding firmly in order to avoid destroy maternal moulding, model behind the mold removal (female parent) can be cleaned out, keep and treat to use next time, production mould preparation work is so far all finished, and next step will carry out embossed decorative plate frame of polyurethane and make production.
The embossed decorative plate frame of polyurethane preparation method:
1, makes backboard: according to the product design requirement, can select various natural wood, glued board, wood-based plate, plastic plate, inorganic clad plate for use, as the backboard of embossment sheet frame.The making of backboard is different because of product, but must match with the tongue and groove that is connected of silica gel mould, in order to avoid during polyurethane foam, produce leakage phenomenon.
2, make the gypsum central layer: make soft or dental stone central layer production mould by designing requirement, the suitable chamber of the ratio of land plaster and water is between 1.2: 1 (component weight ratio) during the modulation calcium plaster, mixing mixing time should be controlled at about 2 minutes, for increasing central layer intensity, can add 4% (accounting for the percentage of gypsum central layer gross weight), long short glass fiber silk and the interpolation of 2-3mm accounts for gypsum central layer gross weight 8% polyvinyl alcohol aqueous solvent, be poured into mould, wipe off with scraper plate, got final product molding in 10 minutes, after placement is dried, by dimensional requirement and backboard is gluing or stitching is integral.
3, coating release agent: at first that mold cleaning is clean before the injection molding, in mold cavity, spray releasing agent.
4, injection molding: preparation polyurethane foam material, the polyurethane foam material formula is acetyl acid esters (PAP1): combined polyether=1: 1 (component weight ratio), add 8 ‰ distilled water by gross weight, preparation technology is 1) take by weighing the each component material respectively, pour a container into, 2) be that 3000 rev/mins spiral agitator stirred for 8 seconds with rotating speed, mixing of materials is even.
Polyurethane material dosing after mixing is injected in the embossed decorative plate frame of polyurethane mould fast, and the mould temperature keeps 38 degree.
5, mold closing:
The previously prepared backboard embedding that the gypsum central layer is housed is pressed on the silica gel mould, sends into clapper die spotting press, the locking mould.
6, slaking:
Under 120 degree, kept 6 minutes.
7, the demoulding:
Treat that embossed decorative plate frame of polyurethane solidifies the back and takes out from rubber moulding, mold cleaning is clean, and be cooled to 48 degree.
8, carry out deburring after the embossed decorative plate frame of polyurethane depanning, arrangement again through surface treatment, is finished product after the assay was approved.
Embodiment 2:
The embossed decorative plate frame of polyurethane mould molding process:
1, is ready to model before the Mold Making earlier and also claims female parent, make maternal material and can use timber, gypsum, resin mold etc.Maternal surface must be bright and clean smooth, no open defect.
2, revising on the good model (female parent), with polyester varnish its surface spray 1-2 time, with increase the fineness of model surface, make do mould inner wall bright and clean more smooth.
3, according to product-forming and production quantity, with refining good pottery mud, resembling and roll system musculus cutaneus sample, roll into the thick mud skin of 2-8mm, be divided into the wide mud bar of 1-4cm by the certain orientation order successively along with the convex-concave of embossment, decorative pattern, apply ointment or plaster at model surface, the good thickness of GPRS is consistent as far as possible when applying ointment or plaster, and is coated with the dense liquid soap of last layer on the mud skin that posts uniformly.
4, model is after posting the mud skin, just can above calcium plaster, get a container and put water, land plaster is sprinkled in the water uniformly, up to land plaster install to can not see water till.Slightly static treat that land plaster soaks into moisture content after, begin again to stir and rapidly calcium plaster splashed on the mud skin of model, thickness is looked product and differently is advisable at 1.5-5cm, as increasing gypsum external mold intensity can be blended into 8% (weight ratio) in calcium plaster fiber.Can strengthen external mold intensity and service life.
5, after treating 12 minutes, treat that the gypsum heating gets final product the demoulding, carry out plaster mold and pattern board alignment mark before the demoulding earlier, carefully take the mud skin that is attached on the model then off, profile in plaster mold, repair bright and clean, stamp demoulding wax, and, open 1-2 the charge door that 3-6cm is square in the higher point of this gypsum external mold, on all the other embossment peaks, get out the steam vent of diameter 3-4mm, more than work ready after, can be with the gypsum external mold alignment mark during according to molding, the summer position is to the model of cleaning out, for preventing that running material uses the calcium plaster caulking joint between gypsum external mold and pattern board, with the whole good pattern die that resets, 30 degree that tilt are put, and notice that charging aperture should be aloft.
6, after the model model is handled well, by formula rate and preparation technology's requirement that silica gel is deployed, the silica gel mould material prescription is a mould silica gel: curing agent=100: 5 (component weight ratio), mould silica gel can adopt DOW CORNING mould silica gel, and curing agent can adopt di lauric dibutyl alkene, in allocation process, to stir sizing material with homogenizer, curing agent and silica gel are fully mixed thoroughly, put into vacuum (-tight) housing and take out wherein bubble, getting rid of the bubble time is 10 minutes.After stirring, wants sizing material timely molding, the mode of glue with drip is poured in the charge door of the high-order bit of model, 80 minutes operating times, allow it trickle naturally and be covered with whole model, along with the gas in the trickling die cavity of glue is progressively discharged by steam vent, when overflowing, glue illustrates that this position glue has been full of die cavity from steam vent, can block up the steam vent of the glue that overflows with pottery mud, till the full whole die cavity of glue stream, glue tentatively solidified in about 4 hours, left standstill 10 hours, treat that its curing fully gets final product the demoulding, colloid solidifies fully needs 72 hours, still can drop into normal use, after silica gel mould is finished, manage to make do the hand-made polyurethane die shoe of doing.
Should scalp edge sealing material on every side earlier successively when 7, sloughing the gypsum external mold, and then prize the gypsum external mold gently, treat that it takes off whole gypsum external mold more gently when all loosening, whole process is as the criterion with not loosening rubber moulding and model (female parent).
8, take off the gypsum external mold after, promptly make on the model of rubber moulding (female parent) base plate with clamping plate around impale rubber moulding is trapped among in the middle of, make wooden frame, wooden frame should exceed mould peak 3cm and will the maintenance level.
The polyurethane die shoe material that 9, will quantitatively mix up; be poured on rapidly and uniformly on the colloid mould in the wooden frame, and cover base plate or plastic sheeting rapidly, push the clapper die spotting press increased pressure board and cover completely and treat its foaming; polyurethane foam finished in about 20 minutes, can open clapper die spotting press and take out unitary mould.
Polyurethane die shoe material prescription is acetyl acid esters (PAP1): combined polyether=1.2: 2 (component weight ratio), and add catalyst, and catalyst adds 0.03 gram for per 1 kilogram by gross weight, stirs, and catalyst can adopt stannous octoate.
10, the demoulding: after treating the cooling of polyurethane foam die shoe, can take off die shoe gently, from model (female parent), take off the silica gel mould gently successively, note firmly not pullling or prizing rubber moulding firmly in order to avoid destroy maternal moulding, model behind the mold removal (female parent) can be cleaned out, keep and treat to use next time, production mould preparation work is so far all finished, and next step will carry out embossed decorative plate frame of polyurethane and make production.
The embossed decorative plate frame of polyurethane preparation method:
1, makes backboard: according to the product design requirement, can select various natural wood, glued board, wood-based plate, plastic plate, inorganic clad plate for use, as the backboard of embossment sheet frame.The making of backboard is different because of product, but must match with the tongue and groove that is connected of silica gel mould, in order to avoid during polyurethane foam, produce leakage phenomenon.
2, make the gypsum central layer: make soft or dental stone central layer production mould by designing requirement, the ratio of land plaster and water should be controlled between 1.5: 1 (component weight ratio) during the modulation calcium plaster, mixing mixing time should be controlled at about 2 minutes, for increasing central layer intensity, can add 4% (accounting for the percentage of gypsum central layer gross weight), long short glass fiber silk and the interpolation of 2-3mm accounts for gypsum central layer gross weight 2%～8% polyvinyl alcohol aqueous solvent, be poured into mould, wipe off with scraper plate, got final product molding in 15 minutes, after placement is dried, by dimensional requirement and backboard is gluing or stitching is integral.
3, coating release agent: at first that mold cleaning is clean before the injection molding, in mold cavity, spray releasing agent.
4, injection molding: preparation polyurethane foam material, the polyurethane foam material formula is acetyl acid esters (PAP1): combined polyether=1.5: 2 (component weight ratio), add 1% distilled water by gross weight, preparation technology is 1) take by weighing the each component material respectively, pour a container into, 2) be that 3000 rev/mins spiral agitator stirred for 10 seconds with rotating speed, mixing of materials is even.
Polyurethane material dosing after mixing is injected in the embossed decorative plate frame of polyurethane mould fast, and the mould temperature keeps 40 degree.
5, mold closing:
The previously prepared backboard embedding that the gypsum central layer is housed is pressed on the silica gel mould, sends into clapper die spotting press, the locking mould.
6, slaking:
Under 160 degree, kept 12 minutes.
7, the demoulding:
Treat that embossed decorative plate frame of polyurethane solidifies the back and takes out from rubber moulding, mold cleaning is clean, and be cooled to 48 degree.
8, carry out deburring after the embossed decorative plate frame of polyurethane depanning, arrangement again through surface treatment, is finished product after the assay was approved.
Claims (5)
1, a kind of embossed decorative plate frame of polyurethane mould molding process is characterized in that mould molding process is:
(1) be ready to model before the Mold Making earlier,
(2) on the good model of correction, spray 1～2 time on its surface with polyester varnish, with the fineness of increase model surface,
(3) according to product-forming and production quantity, with the good pottery mud of refining, roll into the thick mud skin of 2～8mm, be divided into the wide mud bar of 1～4cm by the certain orientation order successively along with the convex-concave of impression, apply ointment or plaster at model surface, thickness unanimity is as far as possible grasped in credit when applying ointment or plaster, and is coated with the dense liquid soap of last layer on the training skin that posts uniformly
(4) model is after posting the mud skin, the calcium plaster of making is splashed on the mud skin of model, thickness is looked product and differently is advisable at 1.5～5cm, increase the white cement that gypsum external mold intensity can fusion 20～30% (weight ratio) in land plaster or in calcium plaster, be blended into the fiber of 4～10% (weight ratios)
(5) treat to treat after 10～15 minutes that the gypsum heating gets final product the demoulding, carry out plaster mold and pattern board alignment mark before the demoulding earlier, carefully take the mud skin that is attached on the model then off, profile finishing in the plaster mold is bright and clean, stamp demoulding wax, and in the higher point of this gypsum external mold, open 1～2 charge door that 3～6cm is square, on all the other embossment peaks, get out the steam vent of diameter 3-4mm, more than work ready after, can be with the gypsum external mold alignment mark during according to molding, reset on the model of cleaning out, for preventing that running material uses the calcium plaster caulking joint between gypsum external mold and pattern board, with the whole good pattern die that resets, inclination is put
(6) after the model model is handled well, by formula rate and preparation technology's requirement that silica gel is deployed, the silica gel mould sizing compound formula is a mould silica gel: curing agent=100: 1～5 (component weight ratio), in allocation process, with homogenizer sizing material and curing agent are stirred, putting into vacuum (-tight) housing takes out and wants timely molding after wherein the bubble sizing material stirs, the mode of sizing material with drip is poured in the charge door of the high-order bit of model, 30～90 minutes operating times, when overflowing, glue illustrates that this position glue has been full of die cavity from steam vent, can block up the steam vent of the glue that overflows with pottery mud, till the full whole die cavity of glue stream, about 2-4 hour glue tentatively solidifies, and leaves standstill 6～12 hours, treat that its curing fully gets final product the demoulding
Should scalp edge sealing material on every side earlier successively when (7) sloughing the gypsum external mold, and then prize the gypsum external mold gently and treat that it takes off whole gypsum external mold again when all loosening,
(8) take off the gypsum external mold after, promptly make on the model of rubber moulding (female parent) base plate with clamping plate around impale rubber moulding is trapped among in the middle of, make wooden frame, wooden frame should exceed mould peak 2-4cm and will the maintenance level,
The polyurethane die shoe material that (9) will quantitatively mix up is poured on rapidly and uniformly on the colloid mould in the wooden frame, and covers base plate or plastic sheeting rapidly; pushing the clapper die spotting press increased pressure board covers completely and treats its foaming; polyurethane foam finished in about 6-25 minute, can open clapper die spotting press and take out unitary mould
(10) demoulding: after treating the cooling of polyurethane foam die shoe, can take off die shoe gently, take off the silica gel mould gently successively from model (female parent), the model behind the mold removal (female parent) can be cleaned out, keep and treat to use next time, production mould preparation work is so far all finished.
2, embossed decorative plate frame of polyurethane mould molding process according to claim 1 is characterized in that the mould silica gel in the silica gel mould material prescription adopts DOW CORNING mould silica gel, and curing agent adopts di lauric dibutyl alkene.
3, embossed decorative plate frame of polyurethane mould molding process according to claim 1, it is characterized in that polyurethane die shoe material formula is acetyl acid esters (PAP1): combined polyether=1～1.5: 1～2 (component weight ratio), and adding catalyst, catalyst adds 0.02～0.03 gram for per 1 kilogram by gross weight, stirs.
4, a kind of embossed decorative plate frame of polyurethane preparation method is characterized in that decorating the sheet frame preparation method and is:
(1), make backboard: according to the product design requirement, can select various natural wood for use, glued board, wood-based plate, plastic plate, inorganic clad plate, as the backboard of embossment sheet frame,
(2), make the gypsum central layer: make soft or dental stone central layer production mould by designing requirement, the ratio of land plaster and water should be controlled between 1.2～1.5: 1 (the component weight ratio) during the modulation calcium plaster, mixing mixing time was controlled at about 1～3 minute, be poured into mould, wipe off with scraper plate, got final product molding in 5-20 minute, after placement is dried, by dimensional requirement and backboard is gluing or stitching is integral
(3), coating release agent: at first that mold cleaning is clean before the injection molding, in mold cavity, spray releasing agent,
(4), injection molding: preparation polyurethane foam material: the polyurethane foam material formula is acetyl acid esters (PAP1): combined polyether=1～1.5: 1～2 (component weight ratio), add 5 ‰～1% distilled water by gross weight, preparation technology is 1) take by weighing the each component material respectively, pour a container into, 2) mixed for 6～12 seconds with spiral agitator, mixing of materials is even, the polyurethane material dosing after mixing is injected in the embossed decorative plate frame of polyurethane mould fast, the mould temperature keeps 35～40 degree
(5), mold closing: the previously prepared backboard embedding that the gypsum central layer is housed is pressed on the silica gel mould, sends into clapper die spotting press, locking mould,
(6), slaking: under 120 degree～180 degree, kept 6-15 minute,
(7), the demoulding: treat that embossed decorative plate frame of polyurethane solidifies the back and takes out from rubber moulding, be cooled to the 40-50 degree,
(8), carry out deburring after the embossed decorative plate frame of polyurethane depanning, arrangement again through surface treatment, is finished product after the assay was approved.
5, embossed decorative plate frame of polyurethane preparation method according to claim 4 is characterized in that making the gypsum central layer and can add 3～5% (accounting for the percentage of gypsum central layer gross weight), 2～3mm long short glass fiber silk and interpolation and account for gypsum central layer gross weight 2%～8% polyvinyl alcohol aqueous solvent for increasing central layer intensity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN97107104A CN1057486C (en) | 1997-09-02 | 1997-09-02 | Embossed decorative plate frame of polyurethane and method for making mould thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107104A CN1057486C (en) | 1997-09-02 | 1997-09-02 | Embossed decorative plate frame of polyurethane and method for making mould thereof |
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| Publication Number | Publication Date |
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| CN1177533A true CN1177533A (en) | 1998-04-01 |
| CN1057486C CN1057486C (en) | 2000-10-18 |
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