CN101544777A - Rigid urethane foam moulded foaming device and method for foaming using same - Google Patents
Rigid urethane foam moulded foaming device and method for foaming using same Download PDFInfo
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- CN101544777A CN101544777A CN200910031311A CN200910031311A CN101544777A CN 101544777 A CN101544777 A CN 101544777A CN 200910031311 A CN200910031311 A CN 200910031311A CN 200910031311 A CN200910031311 A CN 200910031311A CN 101544777 A CN101544777 A CN 101544777A
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Abstract
The invention relates to a rigid urethane foam mould foaming device and a method for foaming using the same, which can effectively reduce air lock during forming, foaming cavities and surface cavities. The rigid urethane foam mould foaming device comprises a forming mould which is provided with an exhaust pipe and is also internally provided with accessory material, wherein the accessory material is provided with an air passage, and a ventilation hole communicated with the air passage is arranged on the surface of the accessory material; when the accessory material bears negative pressure, the air passage can keep smooth; the air passage is communicated with the exhaust pipe; and air in the foaming mould enters the accessory material by the ventilation hole and is discharged by the exhaust pipe. The method for foaming with the rigid urethane foam mould foaming device is as follows: urethane foaming material is injected in the cavity of the foaming mould, a negative pressure generator communicated with the exhaust pipe is used for vacuumizing, and air in the foaming mould is enabled to enter the accessory material by the ventilation hole and be discharged by the exhaust pipe. The invention is simple and easy to implement, uses the accessory material of low cost and has obvious application effect.
Description
Technical field
The method that the present invention relates to a kind of rigid urethane foam moulded foam device and use this device to foam.
Background technology
Hard polyurethane foams normally adopts the molding foaming forming technique.The raw material of polyurethane foam injects in the foaming mould behind the rifle head thorough mixing of high pressure foaming machine, and reacting liquid temperature raises, and a spot of gas (whipping agent) is constantly overflowed from reaction solution; On the other hand, because the continuous expansion of reaction solution makes that the die cavity space is more and more littler.If the exhaust of foaming die cavity is not smooth, just easily cause the rising or the interior voltage rise height of regional area of pressing in the die cavity.Like this, interior voltage rise height is unfavorable for flowing of reaction solution, and the foam internal pressure increases simultaneously, and gas is compressed, and influences the foamy filling performance, has increased the foamy fill-up.
In addition, because when die cavity was complicated, expanding foam solution flowed also can produce and comes together mouth, very easily feels suffocated in the foaming process, produces phenomenons such as foam hole; When die cavity was very big, the material feeding time was longer, easily produced and wrapped up in the gas phenomenon, produced phenomenons such as foam surface cavity.
Summary of the invention
The invention provides a kind of rigid urethane foam moulded foam device, use this device foaming, can effectively reduce the vapour lock in the foaming process, reduce foam hole and surface hole.
The present invention also provides the method for using the said apparatus foaming, can effectively reduce the vapour lock in the foaming process, reduces foam hole and surface hole.
Described rigid urethane foam moulded foam device, comprise foaming mould, foaming mould is provided with vapor pipe, also is provided with subsidiary material in the foaming mould, and described subsidiary material have gas passage, the surface is provided with the breather hole that communicates with gas passage, when subsidiary material bear negative pressure, can keep gas passage unobstructed, described gas passage is communicated with vapor pipe, gas in the foaming mould enters subsidiary material through breather hole, is discharged by vapor pipe again.
The breather hole on described subsidiary material surface can be macroscopic hole, also can be the ventilative microvoid structure of various poromeric materials.
As preferred version, described subsidiary material are made up of materials A and/or B, described materials A is made up of air guide thing and air-permeable envelope, be provided with gas passage in the air guide thing, described gas passage has at least one opening on the wall of air guide thing, and described opening is covered by air-permeable envelope, be distributed with breather hole on the air-permeable envelope, described material B is the venting bags that has gas passage, the material that filling can make gas pass through in the venting bags, and the venting bags surface arrangement has breather hole.
The air guide thing can be the metalwork or the plastic component of band gas passage in the described materials A.As preferred version, the air guide thing is the metalwork or the duroplasts spare of band groove.As another kind of preferred version, the air guide thing is hollow porous metal pipe or hard plastic tube.
In the described materials A material of air-permeable envelope can be for air-permeable paper, sponge, weave cotton cloth or sponge plastics paper.
Venting bags can be air-permeable paper bag or sponge plastics bag in the described material B.The material that the made gas of filling in the venting bags passes through can be sponge, glass, fabric or mineral wool.Described gas passage is preferably and is plastic hose.
As preferred version, described subsidiary material are located at the place that is easy to generate vapour lock in the foaming mould, and these places can be determined according to simple experiment.Subsidiary material can adopt known manner to be fixed in the foaming mould, as fixing with double faced adhesive tape.As required, described subsidiary material can comprise the materials A and/or the B of a plurality of serial or parallel connections.
As improvement of the present invention, described rigid urethane foam moulded foam device also comprises voltate regulator and the negative pressure generation device that is communicated with the vapor pipe order, and the exhaust lay out between described vapor pipe and the negative pressure generation device is provided with tensimeter.
Use the method for described rigid urethane foam moulded foam device foaming as follows: the polyurethane foam material is injected in the foaming mould chamber, vacuumize by the negative pressure generation device that is communicated with vapor pipe, make the gas in the foaming mould enter subsidiary material, discharge by vapor pipe again through breather hole.
During exhaust, should guarantee neither to destroy the foaming process in the foam, guarantee that again the gas passage in the subsidiary material is smooth and easy, can discharge the gas that is unfavorable for foaming smoothly.As preferred version, during exhaust, negative pressure is less than 0.03MPa in the vapor pipe.
Vacuumize and when injecting the polyurethane foam material in the foaming mould chamber, to carry out, also can after injecting the polyurethane foam material in the foaming mould chamber, carry out.
The present invention is by the subsidiary material is communicated with the negative pressure generation device are set in foaming mould, by suitable negative pressure, will be unfavorable for that the gas that foams discharges, and reduces pressure in the film chamber, helps the mobile of reaction solution, so can reduce foamy fill-up 1～10%.In addition, discharge owing to be unfavorable for the gas that foams, vapour lock reduces greatly, is not easy in the foaming process to produce to feel suffocated and wrap up in the gas phenomenon, thereby has significantly reduced phenomenons such as foam hole and surface hole.Owing to only need in foaming mould, easily produce the place of vapour lock subsidiary material are set, determine subsidiary material according to actual row tolerance simultaneously, so the volume of subsidiary material can be very little.Subsidiary material can be according to practical situation, take out or it is stranded in the hard polyurethane foams after the moulding of decision hard polyurethane foams, as for sheet material, general subsidiary material are located at the foaming mould inner side-wall, take out subsidiary material after the hard polyurethane foams moulding; And for the water-heater cylindrical shell, then subsidiary material are stranded in the hard polyurethane foams of moulding.
The present invention is simple, and used subsidiary materials cost is cheap, and very practical, implementation result is obvious.According to the retrieval, the patent documentation report that does not still have characteristics of the present invention both at home and abroad.
Description of drawings
Fig. 1 is a rigid urethane foam moulded foam device of the present invention;
Fig. 2 is the structural representation of embodiment 1;
Fig. 3 is the C-C cutaway view Amplified image of Fig. 2;
Fig. 4 is the structural representation of embodiment 2;
Fig. 5 is the D-D cutaway view Amplified image of Fig. 4;
Fig. 6 is the front view of embodiment 3;
Fig. 7 is the E-E cutaway view Amplified image of Fig. 6;
Fig. 8 is the structural representation of embodiment 4;
Fig. 9 is the structural representation of embodiment 5;
Figure 10 is the structural representation of embodiment 6 (omission subsidiary material);
Figure 11 is the vertical view of Figure 10;
Figure 12 is the F-F sectional view (subsidiary material are arranged) of Figure 10;
Figure 13 is the front view (subsidiary material are arranged) of Figure 10;
Figure 14 is the front view of embodiment 7;
Figure 15 is the upward view of embodiment 7;
Figure 16 is the H-H sectional view of Figure 15.
Embodiment
Describe the present invention in more detail below by embodiment, but the present invention is not limited in these examples.
As shown in Figure 1, rigid urethane foam moulded foam device comprises foaming mould 1, voltate regulator 4 and negative pressure generation device 5, foaming mould 1 is provided with vapor pipe 2, sprue 3, vapor pipe 2 orders are communicated with voltate regulator 4 and negative pressure generation device 5, vapor pipe 2 is connected by pipe connecting 6 with voltate regulator 4, and pipe connecting 6 is provided with tensimeter 7.On the foaming mould 1 except that sprue 3 and vapor pipe 2, integral sealing.
For the clear concrete structure that shows subsidiary material, Fig. 3 is with the signal of coming of each parts branch.As shown in Figures 2 and 3, materials A is made up of air-permeable envelope 8 and air guide thing 9, air guide thing 9 is a quadrate hollow metal part for the cross section, internal cavities is a gas passage 10, be evenly equipped with through hole 11 on one sidewall, air-permeable envelope solid 8 fixes on the outside surface of air guide thing 9, to cover all through holes 11, be distributed with breather hole 12 on the air-permeable envelope 8, breather hole 12 communicates with gas passage 10.
For the clear concrete structure that shows subsidiary material, Fig. 5 is with the signal of coming of each parts branch.As shown in Figure 4 and Figure 5, materials A is made up of air-permeable envelope 8 and air guide thing 9, air guide thing 9 is circular hollow metal part for the cross section, internal cavities is a gas passage 10, be evenly equipped with through hole 11 on the sidewall vertically, air-permeable envelope 8 is fixed on the outside surface of air guide thing 9, to cover all through holes 11, be distributed with breather hole 12 on the air-permeable envelope 8, breather hole 12 communicates with gas passage 10.
For the clear concrete structure that shows subsidiary material, Fig. 7 is with the signal of coming of each parts branch.As shown in Figure 6 and Figure 7, materials A is made up of air-permeable envelope 8 and air guide thing 9, air guide thing 9 is the metalwork of band groove, groove is a gas passage 10, air-permeable envelope 8 is fixed on the outside surface of air guide thing 9, to cover the opening of groove on air guide thing 9 surfaces, be distributed with breather hole 12 on the air-permeable envelope 8, breather hole 12 communicates with gas passage 10.
Embodiment 4
As shown in Figure 8, material B is the venting bags 13 that has gas passage 10, the material that filling can make gas pass through in the venting bags 13, as sponge, glass, fabric or mineral wool, venting bags 13 surface arrangement have breather hole 12, and described gas passage 10 is a plastic hose, communicates with breather hole 12.Venting bags 13 can be ventilative paper bag, also can be the sponge plastics bag.
Embodiment 5
For the rigid urethane foam moulded foam device of sheet material, generally adopt materials A as subsidiary material 14.As shown in Figure 9, foaming mould 1 surrounds a cavity by top plate, lower bolster and metal frame, and subsidiary material 14 are located at the inboard of metal frame, and the gas inside passage is communicated with vapor pipe 2.During foaming, foaming mould 1 suitably can be tilted, make 2 of vapor pipes at one end be higher than 3 of sprues at one end, easy to exhaust.
The contrast of table 1 polyurethane plate foaming situation
When using rigid urethane foam moulded foam device shown in Figure 9 to foam, negative pressure generation device 5 is connected with foaming mould 1 by shown in Figure 1, the sprue 3 of high-pressure foam agent rifle head and foaming mould 1 is tightly connected.When high pressure foaming machine injects foaming mould 1 with the polyurethane foam material by sprue 3, vacuumize then,, make vapor pipe 2 interior negative pressure less than 0.03MPa with the gauge pressure that voltate regulator 4 is regulated tensimeter 7 by negative pressure generation device 5.After the foam slaking, stop to vacuumize, gained hard polyurethane foam board material is dissected in the demoulding, observes and the detection foaming properties, the results are shown in Table shown in 1.
Embodiment 6
For columnar rigid urethane foam moulded foam device, generally adopt material B as subsidiary material 14.Shown in Figure 10-12, the foaming of cylindrical shells such as water-heater does not need anchor clamps usually, just can foam by molding but the inner bag of dependence water-heater and shell surround cavity.There is hamper 15 the cylindrical shell middle and lower part of water-heater 1, and the top of cylindrical shell is the mouth that comes together of polyurethane foam, and this two place easily produces the hole, can add subsidiary material 14, venting bags 13 is located at the top of hamper 15 tops and cylindrical shell, and two material B are composed in series, and is communicated with vapor pipe 2.
Use when rigid urethane foam moulded foam device foams shown in Figure 10-11, negative pressure generation device 5 is connected with foaming mould 1 by shown in Figure 1, the sprue 3 of high-pressure foam agent rifle head and foaming mould 1 is tightly connected.When high pressure foaming machine injects foaming mould 1 with the polyurethane foam material by sprue 3, vacuumize then,, make vapor pipe 2 interior negative pressure less than 0.03MPa with the gauge pressure that voltate regulator 4 is regulated tensimeter 7 by negative pressure generation device 5.After the foam slaking, stop to vacuumize, the gained rigid polyurethane foam is dissected in the demoulding, observes and the detection foaming properties, the results are shown in Table shown in 2.
The contrast of table 2 water-heater foaming situation
Embodiment 7
For the used rigid urethane foam moulded foam device of refrigerator, generally adopt material B as subsidiary material 14.Refrigerator mouth frame foams mode down shown in Figure 13-15, and refrigerator is complex-shaped, and reaction solution flows to produce and comes together mouth, and air-resistance phenomenon easily takes place.Subsidiary material 14 are composed in series by 4 material B.
Use when rigid urethane foam moulded foam device foams shown in Figure 10-11, negative pressure generation device 5 is connected with foaming mould 1 by shown in Figure 1, the sprue 3 of high-pressure foam agent rifle head and foaming mould 1 is tightly connected.When high pressure foaming machine injects foaming mould 1 with the polyurethane foam material by sprue 3, vacuumize then,, make vapor pipe 2 interior negative pressure less than 0.03MPa with the gauge pressure that voltate regulator 4 is regulated tensimeter 7 by negative pressure generation device 5.After the foam slaking, stop to vacuumize, the gained rigid polyurethane foam is dissected in the demoulding, observes and the detection foaming properties, the results are shown in Table shown in 3.
The contrast of table 3 refrigerator body foaming situation
Claims (17)
1. rigid urethane foam moulded foam device, comprise foaming mould, foaming mould is provided with vapor pipe, it is characterized in that also being provided with subsidiary material in the foaming mould, and described subsidiary material have gas passage, the surface is provided with the breather hole that communicates with gas passage, subsidiary material can bear negative pressure, keep gas passage unobstructed, and described gas passage is communicated with vapor pipe, gas in the foaming mould enters subsidiary material through breather hole, is discharged by vapor pipe again.
2. rigid urethane foam moulded foam device as claimed in claim 1, it is characterized in that described subsidiary material are made up of materials A and/or B, described materials A is made up of air guide thing and air-permeable envelope, be provided with gas passage in the air guide thing, described gas passage has at least one opening on the wall of air guide thing, described opening is covered by air-permeable envelope, be distributed with breather hole on the air-permeable envelope, described material B is the venting bags that has gas passage, the material that filling can make gas pass through in the venting bags, the venting bags surface arrangement has breather hole.
3. rigid urethane foam moulded foam device as claimed in claim 2 is characterized in that the air guide thing is the metalwork or the plastic component of band gas passage in the described materials A.
4. rigid urethane foam moulded foam device as claimed in claim 3 is characterized in that metalwork or the duroplasts spare of air guide thing for the band groove.
5. rigid urethane foam moulded foam device as claimed in claim 3 is characterized in that the air guide thing is hollow porous metal pipe or hard plastic tube.
6. as each described rigid urethane foam moulded foam device among the claim 2-5, it is characterized in that the material of air-permeable envelope in the described materials A is air-permeable paper, sponge, weave cotton cloth or sponge plastics paper.
7. rigid urethane foam moulded foam device as claimed in claim 2 is characterized in that venting bags is ventilative paper bag or sponge plastics bag in the described material B.
8. as each described rigid urethane foam moulded foam device in the claim 2,3,4,5 or 7, it is characterized in that the material that interior the made gas of filling of venting bags passes through is sponge, glass, fabric or mineral wool.
9. as each described rigid urethane foam moulded foam device in the claim 2,3,4,5 or 7, it is characterized in that the gas passage in the described material B is a plastic hose.
10. as each described rigid urethane foam moulded foam device in the claim 2,3,4,5 or 7, it is characterized in that described subsidiary material comprise the materials A and/or the B of a plurality of serial or parallel connections.
11. as each described rigid urethane foam moulded foam device in the claim 1,2,3,4,5 or 7, it is characterized in that also being provided with sprue on the foaming mould, except that sprue and vapor pipe, integral sealing.
12., it is characterized in that described subsidiary material are located at the place that is easy to generate vapour lock in the foaming mould as each described rigid urethane foam moulded foam device in the claim 1,2,3,4,5 or 7.
13. as each described rigid urethane foam moulded foam device in the claim 1,2,3,4,5 or 7, it is characterized in that also comprising the voltate regulator and the negative pressure generation device that are communicated with the vapor pipe order, the exhaust lay out between described vapor pipe and the negative pressure generation device is provided with tensimeter.
14. the method for each described rigid urethane foam moulded foam device foaming among use such as the claim 1-13, it is characterized in that the polyurethane foam material is injected in the foaming mould chamber, vacuumize by the negative pressure generation device that is communicated with vapor pipe, make the gas in the foaming mould enter subsidiary material, discharge by vapor pipe again through breather hole.
15. as the method for foaming as described in the claim 14, when it is characterized in that exhaust, negative pressure is less than 0.03MPa in the vapor pipe.
16., when it is characterized in that injecting the polyurethane foam material in the foaming mould chamber, vacuumize by the negative pressure generation device as the method for foaming as described in the claim 14.
17., after it is characterized in that injecting the polyurethane foam material in the foaming mould chamber, vacuumize by the negative pressure generation device as the method for foaming as described in the claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100313113A CN101544777B (en) | 2009-05-08 | 2009-05-08 | Rigid urethane foam moulded foaming device and method for foaming using same |
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| CN2009100313113A CN101544777B (en) | 2009-05-08 | 2009-05-08 | Rigid urethane foam moulded foaming device and method for foaming using same |
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| CN101544777A true CN101544777A (en) | 2009-09-30 |
| CN101544777B CN101544777B (en) | 2011-08-24 |
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| CN2009100313113A Expired - Fee Related CN101544777B (en) | 2009-05-08 | 2009-05-08 | Rigid urethane foam moulded foaming device and method for foaming using same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101905505A (en) * | 2010-07-06 | 2010-12-08 | 杭州长命乳胶海绵有限公司 | Production method of slow-rebound sponge |
| CN102173057A (en) * | 2011-01-05 | 2011-09-07 | 合肥美的荣事达电冰箱有限公司 | Foaming equipment, foaming process and foaming process for refrigeration equipment |
| CN102320166A (en) * | 2011-07-15 | 2012-01-18 | 江西际海制冷设备有限公司 | Fabrication method of polyurethane insulation board of mortuary refrigerator |
| CN102372854A (en) * | 2010-08-13 | 2012-03-14 | 深圳市国志汇富高分子材料股份有限公司 | Preparation method for super macroporous polyurethane reticulated foam plastic |
| CN102529004A (en) * | 2010-12-27 | 2012-07-04 | 南京红宝丽股份有限公司 | Method and device for improving foaming process of refrigerator body or refrigerator door body |
| CN104309141A (en) * | 2014-10-20 | 2015-01-28 | 北京汽车股份有限公司 | Manufacturing method of magnesium alloy pipe and magnesium alloy pipe |
| CN105216208A (en) * | 2015-10-31 | 2016-01-06 | 山东合力冷冻设备有限公司 | Hard polyaminoester negative pressure moulded from foam device |
| CN105985503A (en) * | 2016-06-20 | 2016-10-05 | 海信容声(广东)冰箱有限公司 | Polyurethane reaction composition for negative pressure foaming and method for preparing polyurethane foam by using composition |
| CN106881804A (en) * | 2015-12-15 | 2017-06-23 | 浙江衢州祥光橡塑有限公司 | Process the mould of Yoga rod |
| CN107214904A (en) * | 2017-06-27 | 2017-09-29 | 湖南亚太实业有限公司 | A kind of closed pore PU foaming mould structures |
| CN111421734A (en) * | 2020-03-06 | 2020-07-17 | 青岛海尔电冰箱有限公司 | Refrigerator body foaming method |
| CN114102957A (en) * | 2020-08-31 | 2022-03-01 | 青岛海尔特种制冷电器有限公司 | Box body, preparation method of box body and refrigerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4090105B2 (en) * | 1998-03-31 | 2008-05-28 | 株式会社ダイセン工業 | Foam molding method |
| US7481637B2 (en) * | 2004-05-12 | 2009-01-27 | Woodbridge Foam Corporation | Vented mold and method for producing molded article |
| DE102006056228A1 (en) * | 2006-11-29 | 2008-06-05 | Nordenia Deutschland Gronau Gmbh | Production of molded parts, e.g. sandwich panels with a polyurethane foam core, involves foaming polymer in a closed, vented mold with a flexible, gas-permeable membrane on the inner surface of the mold |
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2009
- 2009-05-08 CN CN2009100313113A patent/CN101544777B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101905505A (en) * | 2010-07-06 | 2010-12-08 | 杭州长命乳胶海绵有限公司 | Production method of slow-rebound sponge |
| CN102372854A (en) * | 2010-08-13 | 2012-03-14 | 深圳市国志汇富高分子材料股份有限公司 | Preparation method for super macroporous polyurethane reticulated foam plastic |
| CN102372854B (en) * | 2010-08-13 | 2013-04-03 | 深圳市国志汇富高分子材料股份有限公司 | Preparation method for super macroporous polyurethane reticulated foam plastic |
| CN102529004A (en) * | 2010-12-27 | 2012-07-04 | 南京红宝丽股份有限公司 | Method and device for improving foaming process of refrigerator body or refrigerator door body |
| CN102529004B (en) * | 2010-12-27 | 2015-05-27 | 南京红宝丽股份有限公司 | Method and device for improving foaming process of refrigerator body or refrigerator door body |
| CN102173057A (en) * | 2011-01-05 | 2011-09-07 | 合肥美的荣事达电冰箱有限公司 | Foaming equipment, foaming process and foaming process for refrigeration equipment |
| CN102320166A (en) * | 2011-07-15 | 2012-01-18 | 江西际海制冷设备有限公司 | Fabrication method of polyurethane insulation board of mortuary refrigerator |
| CN104309141B (en) * | 2014-10-20 | 2016-08-24 | 北京汽车股份有限公司 | Magnesium-alloy tube manufacture method and magnesium-alloy tube |
| CN104309141A (en) * | 2014-10-20 | 2015-01-28 | 北京汽车股份有限公司 | Manufacturing method of magnesium alloy pipe and magnesium alloy pipe |
| CN105216208A (en) * | 2015-10-31 | 2016-01-06 | 山东合力冷冻设备有限公司 | Hard polyaminoester negative pressure moulded from foam device |
| CN106881804A (en) * | 2015-12-15 | 2017-06-23 | 浙江衢州祥光橡塑有限公司 | Process the mould of Yoga rod |
| CN106881804B (en) * | 2015-12-15 | 2019-02-19 | 浙江衢州祥光橡塑有限公司 | Process the mold of Yoga stick |
| CN105985503A (en) * | 2016-06-20 | 2016-10-05 | 海信容声(广东)冰箱有限公司 | Polyurethane reaction composition for negative pressure foaming and method for preparing polyurethane foam by using composition |
| CN105985503B (en) * | 2016-06-20 | 2019-04-02 | 海信容声(广东)冰箱有限公司 | A kind of negative-pressure foaming polyurethane reaction composition and the method using the composition preparation polyurethane foam |
| CN107214904A (en) * | 2017-06-27 | 2017-09-29 | 湖南亚太实业有限公司 | A kind of closed pore PU foaming mould structures |
| CN111421734A (en) * | 2020-03-06 | 2020-07-17 | 青岛海尔电冰箱有限公司 | Refrigerator body foaming method |
| CN114102957A (en) * | 2020-08-31 | 2022-03-01 | 青岛海尔特种制冷电器有限公司 | Box body, preparation method of box body and refrigerator |
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