CN104321185A - Cast molding method using polyurethane - Google Patents
Cast molding method using polyurethane Download PDFInfo
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- CN104321185A CN104321185A CN201380002022.5A CN201380002022A CN104321185A CN 104321185 A CN104321185 A CN 104321185A CN 201380002022 A CN201380002022 A CN 201380002022A CN 104321185 A CN104321185 A CN 104321185A
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- Prior art keywords
- polyurethane
- casting
- molding method
- mould
- fabric
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/52—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
Abstract
The present invention relates to a cast molding method using polyurethane, which is more environmentally friendly than existing PVC by using polyurethane resin, minimizes resin consumption, allows a polyurethane resin mixture to be used even after not being used for a long time, and can express even delicate parts of products such as a triple structure molding. According to the present invention, provided is the cast molding method using polyurethane, comprising: a preparation step of preparing polyurethane and a mold that are required for a casting work; a mold preheating step of preheating the mold at a predetermined temperature; a polyurethane application step of applying the polyurethane to the mold by using an automatic fixed-quantity feeder; a polyurethane curing step of thermally curing the polyurethane applied on the mold, by using a press; a heat-pressing step of putting a raw sheet on the cured polyurethane and thermally pressing the raw sheet and the polyurethane by using the press; a cold-pressing step of cold-pressing the raw sheet and polyurethane that are thermally pressed, by using the press; and a drying and aging step of separating the raw sheet and polyurethane that are cold-pressed, from the mold and drying and aging the pressed raw sheet and polyurethane, wherein the polyurethane is a two-component polyurethane in which polyurethane and a curing agent are mixed.
Description
Technical field
The present invention relates to a kind of utilize polyurethane casting (
) forming method, more specifically, relate to a kind of by utilizing polyurethane resin, than the more environmental protection of PVC in the past, resin consumptions is minimized, polyurethane resin composition also can use after long-time placement simultaneously, also can show the casting and molding method utilizing polyurethane waiting the meticulous part of product as shaping in ternary structural.
Background technology
Generally, formed product method major part adopt common printed or foaming printing process carry out outstanding shaping.But described common printed or foaming be printed on performance product fine portion time have limitation.
In order to improve the problems referred to above, there has been proposed injection molding method.Described injection molding method is that the resin of producing high-molecular is carried out melt-processed resin material liquid under high temperature (200 DEG C), by this kinds of resin material liquids by utilizing the pressure of screw rod to transfer mode or utilizing the pressure injection mode of piston to apply certain pressure, carried out the method for injection mo(u)lding by the inlet of mould.Therefore, when needing the situation of the distinctive physical property of product and function, such as, when there is high requirement to bending, elongation, wearability, bonding strength etc., there is the problem be not too applicable to.
Thus propose the binary/ternary being difficult to showing in common printed operation and give prominence to the casting and molding method be applicable in shaping structures, in described casting and molding method, the main resin used has polyvinyl chloride resin, but PVC becomes problem owing to strengthening the control of phthalate (or ester), is therefore badly in need of developing a kind of environmental protection and the method for the casting of the resin utilizing the bonding strength between a kind of fabric and resin good.
In No. 2003-0089257th, Korean Patent Laid, particularly disclose the casting and molding method of polyurethane resin, but the method needs to reclaim remaining resin by handwork, therefore, there are the following problems, namely, not only resin consumptions is large, and resin is placed long-time the solidification afterwards of more than 24 hours and be difficult to use.
Summary of the invention
Goal of the invention
The present invention proposes to solve the problem, its object is to, a kind of casting and molding method utilizing polyurethane is provided, by utilizing polyurethane resin, than the more environmental protection of PVC in the past, resin consumptions is minimized, polyurethane resin composition also can be used after long-time placement simultaneously, also can show the fine portion of product as shaping in ternary structural.
Technical scheme
According to the invention provides a kind of casting and molding method utilizing polyurethane, the method comprises: preparation process, prepares polyurethane required in casting manipulations and mould; Mould and die preheating step, carries out preheating at a certain temperature by described mould; Polyurethane-coated step, utilizes quantitative automatic discharger by described polyurethane-coated to described mould; Urethane cures step, utilizes punch press to make the polyurethane being coated in described mould carry out heat cure; Hot compression step, places fabric on the top of the polyurethane of described solidification, utilizes punch press to make to carry out hot compression between fabric and polyurethane; Cooled compressed step, utilizes punch press to make the fabric of described hot compression and polyurethane carry out cooled compressed; And dry maturation stage, by the demoulding carry out dry slaking from described mould of the fabric of described cooled compressed and polyurethane, described polyurethane is the two-fluid polyurethane being mixed with polyurethane and curing agent.
In addition, the mould prepared in described preparation process is the mould utilizing sand to complete sand coating.
In addition, described polyurethane is relative to 100 parts by weight of polyurethane, is mixed with the two-fluid polyurethane of 7.3 weight portion curing agent.
In addition, the state that described two-fluid polyurethane is utilizing vacuum defoamation machine to remove bubble is under vacuum conditions formed.
In addition, described urethane cures step is at the temperature conditions of 130-190 DEG C and 50-180kgf/cm
2pressure condition under carry out the heat cure of 30-80 second.
In addition, described hot compression step is at the temperature conditions of 130-190 DEG C and 50-180kgf/cm
2pressure condition under carry out the hot compression of 30-80 second.
In addition, described cooled compressed step is at the temperature conditions of 0-30 DEG C and 50-180kgf/cm
2pressure condition under carry out the cooled compressed of 30-80 second.
In addition, described dry maturation stage is the dry slaking carried out under the temperature conditions of 60-90 DEG C 6-24 hour.
Invention effect
The present invention is by using polyurethane thus having more environmental protection than PVC in the past, resin consumptions is minimized, polyurethane resin composition also can use after long-time placement simultaneously, also can show the effect of the fine portion of product as shaping in ternary structural.
In addition, the present invention utilizes quantitative automatic discharger, thus has and make the consumption of polyurethane minimize and reduce cost, shortens manufacturing process again simultaneously and improves productive effect.
In addition, the shaping product completed after mold releasability, is carried out high temperature drying by the present invention, thus has the uniformity of maintenance product and fraction defective is minimized, and can keep the effect of high physical property Effect value.
Accompanying drawing explanation
Fig. 1 is the flow chart of the process illustrating the casting and molding method utilizing polyurethane according to an embodiment of the invention.
Fig. 2 represents in the casting and molding method of Fig. 1, the equipment photo of the quantitative automatic discharger that urethane composition is quantitatively discharged.
Fig. 3 a and Fig. 3 b is the photo representing nylon facing material and the polyurethane fabric produced by the casting and molding method of Fig. 1.
Fig. 4 a and Fig. 4 b is by the fabric of the casting and molding method manufacture of Fig. 1 and the fabric of described manufacture is intercepted the test report that different piece carries out physical property measurement.
Preferred embodiment
According to the invention provides a kind of casting and molding method utilizing polyurethane, the method comprises: preparation process, prepares polyurethane required in casting manipulations and mould; Mould and die preheating step, carries out preheating at a certain temperature by described mould; Polyurethane-coated step, utilizes quantitative automatic discharger by described polyurethane-coated to described mould; Urethane cures step, utilizes punch press to make the polyurethane being coated in described mould carry out heat cure; Hot compression step, places fabric on the top of the polyurethane of described solidification, utilizes punch press to make to carry out hot compression between fabric and polyurethane; Cooled compressed step, utilizes punch press to make the fabric of described hot compression and polyurethane carry out cooled compressed; And dry maturation stage, by the demoulding carry out dry slaking from described mould of the fabric of described cooled compressed and polyurethane, described polyurethane is the two-fluid polyurethane being mixed with polyurethane and curing agent.
Detailed description of the invention
With reference to the accompanying drawings the preferred embodiments of the present invention are described in detail.First, in the Reference numeral that the inscape of each accompanying drawing is additional, it should be noted that for identical inscape, when illustrating in different drawings, employ identical Reference numeral as much as possible.In addition, in the process that the present invention will be described, if judge relevant known features or function illustrate when may obscure main idea of the present invention, eliminate detailed description thereof.
Fig. 1 is the flow chart of the process illustrating the casting and molding method utilizing polyurethane according to an embodiment of the invention; Fig. 2 represents in the casting and molding method of Fig. 1, the equipment photo of the quantitative automatic discharger that urethane composition is quantitatively discharged; Fig. 3 a and Fig. 3 b is the photo representing nylon facing material and the polyurethane fabric produced by the casting and molding method of Fig. 1; Fig. 4 a and Fig. 4 b is by the fabric of the casting and molding method manufacture of Fig. 1 and the fabric of described manufacture is intercepted the test report that different piece carries out physical property measurement.
With reference to Fig. 1, utilize the process of urethane foundry forming method as follows according to an embodiment of the invention.
1st step prepares polyurethane required in casting manipulations and the preparation process (S110) of mould.Described preparation process comprises: to the selection of the design of required performance, mould preparation afterwards and mould coating etc.
Described polyurethane is preferably mixed with the two-fluid polyurethane of polyurethane and curing agent.Wherein, described polyurethane, preferably relative to the polyurethane of 100 weight portions, is mixed with the two-fluid polyurethane of 7.3 weight portion curing agent.When exceeding above-mentioned scope and adding too much curing agent, may have a negative impact to physical property, therefore preferably in proper range, add curing agent.
In addition, described two-fluid polyurethane is preferably formed in the state utilizing vacuum defoamation machine to remove bubble under vacuum conditions, its reason is that when being made up of high viscosity fluids such as polyurethane, usual bubble is not easy upwards to discharge, now applying vacuum can make bubble easily discharge, thus can improve reactivity.
In addition, the mould prepared in described preparation process preferably utilizes sand to complete the mould of sand coating.Its reason can keep semi-permanent coating state by described sand coating, makes the demoulding after carrying out punch press become easy, thus can maintain excellent quality.
Described 2nd step is the mould and die preheating step (S120) of described mould being carried out at a certain temperature preheating.Carry out under the state that the temperature of mould is preferably maintained 40-60 DEG C by described mould and die preheating step.By making the temperature of mould maintain 40-60 DEG C, the good fluidity of the resin on mould when polyurethane resin applies, can be made, thus the tacky state of fabric after can making it and polyurethane resin is in best state.
3rd step utilizes quantitative automatic discharger by the polyurethane-coated step (S130) of described polyurethane-coated to described mould.As shown in Figure 2, described quantitative automatic discharger is not applied one by one by polyurethane by the handwork of people, but automatically carry out resin-coating quantitatively to discharge polyurethane, thus not only there is the advantage improving speed of production, also there is the advantage of carrying out resin-coating with standardization state.In addition, utilize quantitative automatic discharger can also Accurate Prediction manage hardening time of polyurethane resin.
4th step utilizes punch press to make the polyurethane being coated in described mould carry out the urethane cures step (S140) of heat cure.Described urethane cures step is preferably at temperature conditions and the 50-180kgf/cm of 130-190 DEG C
2pressure condition under carry out the heat cure of 30-80 second.
Described urethane cures step, as step before making the polyurethane resin of semi-cured state carry out on fabric to permeate and compress, can regard the process that the resin of liquid condition is cured as.In this step, post-job surface quality and bonding strength is determined according to temperature conditions, pressure condition and time conditions.Therefore, Poor cohesion and shape defect (dip-dye) can be prevented in advance by described temperature conditions, pressure condition and time conditions.
5th step places fabric on the top of the polyurethane of described solidification, utilizes punch press to make to carry out between fabric and polyurethane the hot compression step (S150) of hot compression.Described hot compression step is by forcing hot compression by polyurethane with infiltration and the mode that is compressed on fabric, is to obtain high adherence and required step.Described fabric is not by the restriction of its kind, as long as the fabric in fact for using in the actual field such as clothes, footwear, cushions, any one fabric can use.Such as, the fabric as tissue occlusion such as leather (natural leather) or dermatines can not only be used, and can the open fabric (such as fabric, mesh fabric etc.) of using-system.
Described hot compression step is preferably at temperature conditions and the 50-180kgf/cm of 130-190 DEG C
2pressure condition under carry out the hot compression of 30-80 second.
When exceeding the temperature conditions of described hot compression step, the bonding between polyurethane resin and fabric may be bad; When not reaching described temperature conditions, the shape being bonded with the fabric of polyurethane resin may be bad because of contaminating.In addition, when exceeding the pressure condition of described hot compression step, then the shape being bonded with the fabric of polyurethane resin may be bad because of contaminating; When not reaching described pressure condition, the bonding between polyurethane resin and fabric may be bad.
In addition, when exceeding the time conditions of described hot compression step, the bonding between polyurethane resin and fabric may be bad; If when not reaching described time conditions, the shape being bonded with the fabric of polyurethane resin may be bad because of contaminating.
6th step utilizes punch press to make the fabric of described hot compression and polyurethane carry out the cooled compressed step (S160) of cooled compressed.Described cooled compressed step is after the hot compression of polyurethane resin, prevents the deformation of products in normal temperature cooling procedure in casting, and shortens the necessary step of activity time.
Described cooled compressed step is preferably at temperature conditions and the 50-180kgf/cm of 0-30 DEG C
2pressure condition under carry out the cooled compressed of 30-80 second.
When exceeding the temperature conditions of described cooled compressed step, the bonding between polyurethane resin and fabric may be bad; When not reaching described temperature conditions, the shape being bonded with the fabric of polyurethane resin may be bad because of contaminating.
In addition, when exceeding the pressure condition of described cooled compressed step, the shape being bonded with the fabric of polyurethane resin may be bad because of contaminating; When not reaching described pressure condition, the bonding between polyurethane resin and fabric may be bad.
In addition, when exceeding the time conditions of described cooled compressed step, the bonding between polyurethane resin and fabric may be bad; When not reaching described time conditions, the shape being bonded with the fabric of polyurethane resin may be bad because of contaminating.
7th step is by the demoulding carry out the dry maturation stage (S170) of dry slaking from described mould of the fabric of described cooled compressed and polyurethane.Described dry maturation stage is the definite shape in order to maintain product in outside environmental change (weather, humidity etc.), and maintains the step needed for uniformity of product.Particularly, described dry maturation stage preferably in curing chamber with the dry slaking carrying out 6-24 hour under the temperature conditions of 60-90 DEG C.Its reason is by carrying out dry slaking under described temperature conditions and time conditions, thus can maintain the uniformity of product, and can maintain high physical property Effect value.That is, when the not enough above-mentioned scope of dry cooking conditions, inside or the overall possibility of the polyurethane resin of coating cannot carry out drying; When exceeding above-mentioned scope, need the fabric of coating may cause serious distortion.
Therefore, the fabric being bonded with polyurethane of casting by described preparation process (S110)-mould and die preheating step (S120)-polyurethane-coated step (S130)-urethane cures step (S140)-hot compression step (S150)-cooled compressed step (S160)-dry maturation stage (S170), it can realize the shaping of the ternary structural that cannot be showed by common printing process or foaming printing process.
The casting and molding method utilizing polyurethane of the present invention is described in detail below by embodiment 1 and embodiment 2.
Embodiment 1
Preparation need show mould (mould applies sand) and the polyurethane (being mixed with the curing agent of 7.3 weight portions relative to 100 parts by weight of polyurethane) on nylon facing material surface.Then, under the state that the temperature of mould is maintained 50 DEG C, utilize quantitative automatic discharger, by the coated weight of polyurethane accurately to be quantitatively coated on mould.Then utilize punch press by the polyurethane that is coated in mould mechanical temperature be 150 DEG C, pressure is 150kgf/cm
2, the time is under the condition of 45 seconds, carries out the heat cure of polyurethane.Then fabric is placed on the top of polyurethane, utilize punch press mechanical temperature be 150 DEG C, pressure is 110kgf/cm
2, the time is under the condition of 50 seconds, carries out the hot compression between fabric and polyurethane.Then utilize punch press by the fabric of hot compression and polyurethane mechanical temperature be 0 DEG C, pressure is 150kgf/cm
2, the time is under the condition of 30 seconds, carries out cooled compressed.Finally, the demoulding from described mould by the fabric of cooled compressed and polyurethane, in dry curing chamber, carries out the dry slaking of 12 hours with indoor temperature 70 DEG C.
Embodiment 2
Preparation need show mould (mould applies sand) and the polyurethane (being mixed with the curing agent of 7.3 weight portions relative to 100 parts by weight of polyurethane) on nylon facing material surface.Then, under the state that the temperature of mould is maintained 50 DEG C, utilize quantitative automatic discharger, by the coated weight of polyurethane accurately to be quantitatively coated on mould.Then utilize punch press by the polyurethane that is coated in mould mechanical temperature be 150 DEG C, pressure is 150kgf/cm
2, the time is under the condition of 45 seconds, carries out the heat cure of polyurethane.Then fabric is placed on the top of polyurethane, utilize punch press mechanical temperature be 180 DEG C, pressure is 110kgf/cm
2, the time is under the condition of 50 seconds, carries out the hot compression between fabric and polyurethane.Then utilize punch press by the fabric of hot compression and polyurethane mechanical temperature be 0 DEG C, pressure is 150kgf/cm
2, the time is under the condition of 30 seconds, carries out cooled compressed.Finally, the demoulding from described mould by the fabric of cooled compressed and polyurethane, in dry curing chamber, carries out the dry slaking of 12 hours with indoor temperature 70 DEG C.
Fig. 3 a and Fig. 3 b represents by embodiment 1 and embodiment 2 photo by nylon facing material shaping for urethane foundry and polyurethane fabric, shows consistent uniform Product Status on the whole.
In addition, Fig. 4 a and Fig. 4 b is by the fabric of the casting and molding method manufacture of Fig. 1 and the described fabric of described manufacture is intercepted the test report that different piece carries out physical property measurement.
With reference to Fig. 4 b, by manufacture fabric according to different piece with 10mm(1cm) wide cut intercept five carry out strippings test, its result, be judged as when usually reaching more than 2.5kg/cm that bonding strength is excellent, in this result five all considerably beyond 2.5kg/cm, thus can confirm to have excellent bonding strength.Particularly, in achievement, " test piece destruction " is when representing that bonding force is peeling by force and not, and the situation that product itself or fabric are destroyed, can confirm that bonding strength reaches more than 5kg/cm, demonstrate very good state.
Therefore, by the casting and molding method utilizing polyurethane according to the embodiment of the present invention, it has following effect, that is, can shorten flow chart and improve productivity, shortened by operation and produce consistent product, the fabric of high-quality can be prepared, in operation process, ensure that the hardening time accurately of polyurethane resin, after resin solidification, place fabric, by hot compression by the resin-dipping of semi-cured state and be compressed on fabric, have and can realize high adherence.In addition, the product completing casting is carried out high temperature drying after the demoulding from mould in curing chamber, thus in outside environmental change (weather, humidity etc.), also can maintain the uniformity of product, and high physical property Effect value (especially bonding strength) can be guaranteed.
More than illustrate that those skilled in the art can carry out various deformation in the scope not departing from intrinsic propesties of the present invention just to exemplary illustration of the present invention.Therefore, embodiment disclosed in description of the present invention is not intended to limit the present invention but for illustration of the present invention, and thought of the present invention and scope also be can't help these embodiments and limited.Therefore scope of the present invention should be explained by the claims of enclosing, and should be interpreted as being included in right of the present invention with all technology in its equivalency range.
Industrial applicibility
The present invention relates to a kind of casting and molding method utilizing polyurethane, and method of the present invention can extensively be used in as environmental protection and in the moulding process of polyurethane of the resin of bonding strength excellence between fabric and resin etc.
Claims (8)
1. utilize the casting and molding method of polyurethane, it is characterized in that, the method comprises:
Preparation process, prepares polyurethane required in casting manipulations and mould;
Mould and die preheating step, carries out preheating at a certain temperature by described mould;
Polyurethane-coated step, utilizes quantitative automatic discharger by described polyurethane-coated to described mould;
Urethane cures step, utilizes punch press to make the polyurethane being coated in described mould carry out heat cure;
Hot compression step, places fabric on the top of the polyurethane of described solidification, utilizes punch press to make to carry out hot compression between fabric and polyurethane;
Cooled compressed step, utilizes punch press to make the fabric of described hot compression and polyurethane carry out cooled compressed; And
Dry maturation stage, by the demoulding carry out dry slaking from described mould of the fabric of described cooled compressed and polyurethane,
Described polyurethane is the two-fluid polyurethane being mixed with polyurethane and curing agent.
2. the casting and molding method utilizing polyurethane according to claim 1, is characterized in that, the mould prepared in described preparation process is the mould utilizing sand to complete sand coating.
3. the casting and molding method utilizing polyurethane according to claim 1 and 2, is characterized in that, described polyurethane is relative to 100 parts by weight of polyurethane, is mixed with the two-fluid polyurethane of 7.3 weight portion curing agent.
4. the casting and molding method utilizing polyurethane according to claim 3, is characterized in that, the state that described two-fluid polyurethane is utilizing vacuum defoamation machine to remove bubble is under vacuum conditions formed.
5. the casting and molding method utilizing polyurethane according to claim 1 and 2, is characterized in that, described urethane cures step is at the temperature conditions of 130-190 DEG C and 50-180kgf/cm
2pressure condition under carry out the heat cure of 30-80 second.
6. the casting and molding method utilizing polyurethane according to claim 5, is characterized in that, described hot compression step is at the temperature conditions of 130-190 DEG C and 50-180kgf/cm
2pressure condition under carry out the hot compression of 30-80 second.
7. the casting and molding method utilizing polyurethane according to claim 6, is characterized in that, described cooled compressed step is at the temperature conditions of 0-30 DEG C and 50-180kgf/cm
2pressure condition under carry out the cooled compressed of 30-80 second.
8. the casting and molding method utilizing polyurethane according to claim 7, is characterized in that, described dry maturation stage is the dry slaking carried out under the temperature conditions of 60-90 DEG C 6-24 hour.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0156621 | 2012-12-28 | ||
| KR1020120156621A KR101282505B1 (en) | 2012-12-28 | 2012-12-28 | Casting formation method using polyurethane |
| PCT/KR2013/006177 WO2014104508A1 (en) | 2012-12-28 | 2013-07-11 | Cast molding method using polyurethane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104321185A true CN104321185A (en) | 2015-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380002022.5A Pending CN104321185A (en) | 2012-12-28 | 2013-07-11 | Cast molding method using polyurethane |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101282505B1 (en) |
| CN (1) | CN104321185A (en) |
| WO (1) | WO2014104508A1 (en) |
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| CN108927460A (en) * | 2017-05-23 | 2018-12-04 | 成都飞机工业（集团）有限责任公司 | A kind of deep U type sheet metal component molding die processing method |
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| KR102048061B1 (en) | 2018-12-14 | 2019-11-22 | 주식회사동보에스엠 | Shoe upper using polyurethane casting and method of manufacturing thereof |
| KR102222689B1 (en) * | 2019-08-07 | 2021-03-04 | 배정희 | a synthetic caster machine |
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| JP2870718B2 (en) * | 1993-02-22 | 1999-03-17 | 河西工業株式会社 | Manufacturing method for automotive interior parts |
| KR20030089257A (en) * | 2002-05-17 | 2003-11-21 | 주식회사 동성화학 | Polyurethane resin for using molding |
| KR20070102064A (en) * | 2006-04-13 | 2007-10-18 | 유니월드오토테크주식회사 | Three liquid-typy polyurethane casting system |
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2012
- 2012-12-28 KR KR1020120156621A patent/KR101282505B1/en not_active IP Right Cessation
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2013
- 2013-07-11 WO PCT/KR2013/006177 patent/WO2014104508A1/en active Application Filing
- 2013-07-11 CN CN201380002022.5A patent/CN104321185A/en active Pending
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| CN2105484U (en) * | 1991-11-11 | 1992-05-27 | 杨祖良 | Ration feeding device |
| KR20040104443A (en) * | 2004-11-22 | 2004-12-10 | 목동엽 | manufacturing method for label and ornament using polyurethane resin |
| KR100879980B1 (en) * | 2008-09-19 | 2009-01-23 | (주)자이로 | One -liquid type curable polyurethane resin composition for key-pad and its making method |
| KR101026724B1 (en) * | 2009-01-14 | 2011-04-08 | (주)자이로 | Making method for one-liquid type curable polyurethane resin composition for logo label for clothing |
| CN101948616A (en) * | 2010-09-13 | 2011-01-19 | 安徽大学 | Microporous polyurethane elastomer shock absorption element for high-speed railway and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927460A (en) * | 2017-05-23 | 2018-12-04 | 成都飞机工业（集团）有限责任公司 | A kind of deep U type sheet metal component molding die processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014104508A1 (en) | 2014-07-03 |
| KR101282505B1 (en) | 2013-07-04 |
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