CN1839025A

CN1839025A - Expandable resin coated heat insulation board and its manufacture method and apparatus

Info

Publication number: CN1839025A
Application number: CNA038271540A
Authority: CN
Inventors: M·莫兰迪
Original assignee: Metecno SpA
Current assignee: Metecno SpA
Priority date: 2003-08-01
Filing date: 2003-09-29
Publication date: 2006-09-27
Also published as: WO2005011951A1; AU2003253303A1; AU2003274717A1; WO2005011950A3; AU2003274717A8; WO2005011950A2; EP1651416A2

Abstract

There is disclosed an insulating panel (20) and a method for continuous manufacturing thereof, wherein a polyurethane expansible resin (13) of the quick-reaction type is sprayed on a strip (4); after the sprayed resin has expanded, another resin (17) is poured in liquid condition, thereby obtaining the insulating core of the panels. The invention also concerns the apparatus for carrying out the method.

Description

Thermal insulation board and manufacture method and equipment with the expandable resin spraying

Technical field

The present invention relates generally to the production of Combined thermal insulative panel (insulating panels).

Background technology

People are known, and these plates are also referred to as " sandwich " plate usually, are widely used in civil buildings and industrial construction fields such as structure wall, roof, covering, flat board, composite door; This plate also is applied to construct used refrigerating chamber of low temperature or cold storage container.

The plate of Kao Lving comprises two opposite faces substantially herein, is the heat insulation core of being made by the expandable resin that is also referred to as foam usually between these two faces; This core generally is a polyurethane foam, but also can be the foam of phenol formaldehyde foam or other form.

The industrial production of these plates can be carried out in continuous or discontinuous mode.

First kind of situation, particularly useful for a large amount of productions of plate with outer metallic surface; For this reason, two laths of metals self are advanced along the production equipment of array, launch from their reels separately.

After the initial die mould step of these laths, coated with resins on lower strip expands then, and these laths are by a continous pressing machine simultaneously, and this forcing press makes them keep separately one section distance that equals production board thickness.

This continuous production processes is known already, because for a long time ought to be with reference to existing publication and the application's applicant as proprietary many patents for the further understanding of this respect.

On the other hand, the discontinuous production of plate is more suitable in mini-series or special plate; The latter can have by metal or other material, the outer surface of making such as plastic material (Merlon or other analog) or other material (being timber etc.) for instance.

Prepare respectively on the surface of plate, is placed on then in the mould of the coating of carrying out polymer resin and expansion, forms heat barrier foam thus.

Can see that this production technology needs the long time with respect to continuous production processes, because some invalid times will be arranged inevitably when the surface must be placed in the mould and therefrom take out the plate of finishing.

But, except above-mentioned different production method, it is pointed out that it is very important that polymer resin expands equably for production high-quality plate; For this reason, be near bubble or other gas that the outer surface of plate, does not have and to cause problem with one of its condition that will follow.

One of problem that causes is the delamination of plate, that is to say, the surface of plate breaks away from.

In fact, in the time of daytime and evening or summer and the variation of winter temperature condition, contained gas periodically expands in the bubble, causes the tired gradually and inner cavity district expansion of foam; In the long term, this situation can cause the surface of plate to break away from.

Therefore, German patent application No.19741523 is known a kind of method of continuous production plate, and wherein the liquid resin from jet stem (nozzle bar) cast is evenly distributed on the surface of lath by air jet.

The effect of this air jet is in order to eliminate the bubble in most of liquid resin, thereby obtains the product that needs.

As if yet the method for this application of resin is difficult for implementing, because air can not be consistent on the width of whole lath to the influence of resin; Equipment described in this German patent application in fact has suitable device for coming the Restricted edge edge effect, that is to say, because air is inconsistent in the effect in this zone, so form the accumulation of resin along the edge of lath.

As if in addition, the method for this known application depends on the viscosity of resin to a great extent, because according to the resin flow difference, obviously the effect of air on resin is also just different.

In other words, the type according to the plate that will produce may be difficult to carry out this known method; Therefore, for example do not show that adopting uses the same method can produce polyurethane resin plate and phenolic resins plate effectively.

If, improve pace,, may be difficult to carry out equally if, improve the quantity of application of resin perhaps because need to make thicker plate to the laths of metal of its application of resin in order to improve the plate output.

Summary of the invention

In view of these arguments, therefore, the problem to be solved in the present invention provides a kind of method that is used for producing continuously thermal insulation board, wherein by this way polymer resin is coated at least one lath equably, promptly not only prevent near lath, to form bubble, and between foam and lath surface, realize the raising of adhesion strength.

The solution of this problem is, at lath surface spraying ground floor resin; Therefore in fact, described surface is covered equably, may produce bubble if lack uniformity.

In case the layer of spraying expands, and can pour into a mould second layer liquid resin upward, so produce the heat insulation core of required thickness and density.

Description of drawings

These and other feature of the present invention is set forth in the appended claims; From the explanation of following non-limiting embodiment of the present invention shown in the accompanying drawings, they will become clearer, wherein:

Description of drawings

Fig. 1 briefly shows the continuous production equipment according to plate of the present invention,

A details of Fig. 2 presentation graphs 1 equipment,

Fig. 3 cuts open the sectional view of getting along III-III line among Fig. 1,

Fig. 4 is the perspective view of the plate made according to the present invention, and

Fig. 5 and 6 representation class respectively is similar to the modification of the said equipment of looking in Fig. 2 and 3;

The perspective view and the sectional view of a kind of modification of Fig. 7 and 8 expressions plate of the present invention;

Fig. 9 and 10 is Fig. 7, and plate is at sectional view and the perspective view of fabrication stage in 8;

Figure 11 is the modification of fabrication stage among Fig. 9.

The specific embodiment

First figure in these accompanying drawings represents two reels, 2,3 beginnings from laths of

metal

4 and 5, is used for making continuously the equipment according to plate of the present invention, generally represents with 1.

In this equipment 1, lath is processed by forming machine 6 and 7 separately after expansion, forms common limit, rib, section bar etc. in known manner in forming machine.

In the downstream of forming machine,

lath

4 and 5 is to close together, up to the zone of coating expandable resin; This operation is implemented in two steps suddenly.

Particularly, first step is made up of head 9 spraying fast reaction resins; For this reason, the crossbeam 10 of head 9 above being arranged in lath 4 moves around (shown in arrow among Fig. 3), and the nozzle that is provided with a known type own and does not illustrate in the drawings.The pace of lower strip 4 is set by this way, and promptly the resin (at least in part) that sprays in the above forms the layer 13 that evenly covers lath 4 before expanding into certain position, second crossbeam, 11 belows.

The pouring nozzle 12 of known type (it can be single-nozzle or such as the comb type nozzle among the German publication No.19741523) moves around along second crossbeam, and the same with the resinous type of spraying previously but be the resin of liquid state by cast on the layer 13 that expands, carry out the step (vertical dotted line among Fig. 3 is represented teeming line) of second application of resin.

Liquid resin expands then, when lath 4 and 5 when itself also being known continous pressing machine 14, just be full of the gap between them.

In the downstream of continous pressing machine, obtain thus having the lath 4 of expansion-injection layer 13 and the semi-finished product 16 that the heat insulation core 17 of 5 and second resin foam constitutes by two; These semi-finished product are by cutting machine 18 cuttings, so obtain to be similar to the production board 20 of Fig. 4 then.

Above-mentioned production technology has solved the problem to be solved in the present invention.

In fact, the spraying resin distributes it equably on lath 4 whole surfaces, so do not have hole or bubble in the layer 13 that obtains.

This is because the result of the resin atomizing of spraying system supply, and atomizing makes and the surface coverage droplet film of lath 4 be similar to the paint film of using with the quadrat method japanning that wherein bubble can not focus on.

In order to realize good spraying resin, according to various parameters, the width of lath for example, its pace, the bleed type of adorning on the head 9, the supply pressure of nozzle, the distance of nozzle and lath, the types of application of resin etc. suitably select head 9 just to be enough to satisfy the demand along the movement velocity of crossbeam 10.

In addition, because resin is a quick-reaction type, thereby produces foam film 13, on this film, can apply liquid resin in known manner subsequently; The size that the hole occurs in whole inside and/or reduce the hole has advantageously been reduced when second resin expands at interface between two resins.

Compare with the above-mentioned prior art that relates to, this production method is reliable, easy to implement and do not need complicated adaptability revision when the speed of resin, lath 4 or other manufacturing parameter change.

In fact, all basically polymer resins (polyurethane or other analog), no matter a kind of component type still is two kinds of component type can both apply with spraying technique; This technology is well-known, and has been used muchly, thereby the type of change resin can not change the efficient of production method of the present invention.

Equally, if the pace of lath changes (for example in order to improve the plate output), upstream mobile a little shower nozzle 9 and crossbeam 10 just are enough to satisfy the demand, just to cause the fast reaction resin can expand before arriving second jet stem 11.

At last, should be understood that another favourable outcome that obtains as the present invention, it has prevented foam relatively poor or inadequate adhesion strength on the plate surface, because it is relatively poor or insufficient to tend to take place adhesion strength when liquid resin is deposited on the lath.

Naturally, the modification of the above embodiment of the present invention is possible.

At first, should be pointed out that the type of plate and shape can be different from shown in Fig. 4; Therefore, can be the one side or the plate of two sides moulding, or with the plate of the even bending of the mould of applicant's exploitation of the application and method production.

In addition, this production method also can comprise the heating steps of using the baker arranged along the operating path of

lath

4 and 5 or lamp to carry out, and this is well known in making sheet; For example, quicken to expand in order to make the resin that is injected on the lower strip 4, baker or lamp can be arranged in the upstream of resin coating region, promptly before shower nozzle 9 and crossbeam 10.

For the injection of resin, should be pointed out that except said nozzle, with regard to the type of nozzle and shape, there are various solutions; Therefore, can in the nozzle that is suitable for most existing operating condition, select, these conditions such as the size and dimension of plate (special-shaped, corrugated, the plane, crooked etc.), produce the device type (continuous, discontinuous) of plate, as heat insulation resin etc.

Shower nozzle 9 another alternative plans that move along the crossbeam 10 of previous embodiment are illustrated in Fig. 5 and 6, and for for simplicity, same element is still used same numbering.

As can be seen, in this embodiment, adopt fixed nozzle bar 30 to replace head 9, wherein a plurality of nozzles jet flow sprayed resin on lath 4, jet flow covers the surface of lath equably.

Equally, for liquid resinous coating, not to adopt the pouring nozzle 12 that moves along crossbeam 11, but in this modification, be provided with the fixed bar 31 (vertical dotted line is represented teeming line) of Strip casting nozzle.

Should be pointed out that at last as a kind of selection, also can on top bars, carry out the injection of resin, perhaps combine with injection on lower strip; Therefore, these can be the method and apparatus that is used to produce according to plate of the present invention, wherein only go up at a lath (promptly only at top bars or lower strip) and spray or all spray on two laths.

The injection of expandable resin also with method no-float at beginning institute's section discontinuous production plate of pointing out; May have several solutions of carrying out this operation, these schemes are mainly based on adopting which kind of mould.

For example, can adopt the shower nozzle that is similar among Fig. 3 or as the jet stem among Fig. 6; In both of these case, after jetted layers expands, pouring liquid resin and close die, so that its expansion, thereby the plate of acquisition desired thickness.

Equally, can see in the quantity-produced situation in front, make plate, equally also prevent between heat barrier foam and outer surface, to form harmful region of no pressure or bubble according to discontinuous mode of the present invention.

This result is especially for building slab, and it is quite important promptly to be used for the plate that facade is used shown in Fig. 7 summary; In fact, because the used specific purposes of this plate, so be appreciated that the outward appearance of plate is extremely important.

As we can see from the figure, the characteristic feature that is expressed as 40 building slab is that they have

outer surface

41 and 42, do not have chrysal (fretting), rib shape striped or other similar characteristics; Therefore, they are level and smooth, and this makes manufacture process become strict, because exist bubble can cause blemish between the foam of outer surface and heat insulation core 43, and this defective may be damaged the appearance of the facade of used this plate.

In fact in addition, lack rib shape striped and make the outer surface rigidity of plate not enough and be easier to distortion, so when there was defective in the core of the heat barrier foam of plate, they can not keep flat shape.

Another characteristic feature of plate noted earlier is that this plate generally is installed on the structure that is made of post and beam 45,46 by bolt 47, carriage 48 and analog; Therefore, their periphery is formed with long and thin annex 49, so that plate can be connected with installation component.

Yet these annexes go wrong in the production process of plate, because heat barrier foam always can not fill up all inner spaces of plate; In fact, these plates by in mould, prepare outer surface and upward the pouring liquid resin make, but liquid resinous viscosity can not make its interior zone that arrives all annexes fully, thereby leaves the problem that region of no pressure and all fronts have been stated and mentioned in annex inside.

Otherwise spraying one deck resin makes resin arrive the innermost zone of annex 49 equably on the one side of plate or two

sides

41,42, thereby forms thin swollen resin layer 50, and the institute that this resin bed fills up near the surface has living space.

Therefore, pourable liquid resin on this swollen resin layer 50, acquisition meets the heat insulation core 42 of the plate of desired thickness thus.

In addition, in this embodiment of the present invention, sprayed resin also is preferably quick-reaction type, because the result shows, can obtain better result like this.

In addition, as mentioned above, also can be on the another side 42 of plate 40 sprayed resin, form one deck (among Fig. 8 shown in the dotted line) near this face thus, prevent from annex, to form bubble or region of no pressure like this.

At last, in the embodiment shown in Fig. 9 and 10 summarys, for fear of unevenness occurs on the metallic plate on surface, use vacuum supporting plane (plane) or pedestal 52 carry out the discontinuous manufacture method of plate, the metallic plate on placing plate 40 surfaces 41 on plane or pedestal.

This internal plane is provided with passage 54, by this passage suction air in a manner known way, therefore below surface 41 acquisition with its vacuum that is attached to plane 52 and eliminates above-mentioned unevenness.

Plane 52 also can move horizontally (shown in arrow in Fig. 8 and 9) with respect to the jet stem 30 of type shown in Fig. 5 and 6 examples: the result is by carrying out once or repeatedly, resin being injected on the surface 41.

Certainly, this situation also can change; For example can use the porous supporting plane, the passage that need form in inside not is because by the possible suction air of these passages: can mention the plane of being made by particieboard, the plastic material that has perforate or sponge material for this reason.

No matter can operate on all types of surfaces for the pneumatic vacuum system that keeps the flatness on sprayed resin surface, resemble considering previously, be metal, plastics or other type.

However, but be appreciated that and can replace with other system, for example under the situation of metallic plate based on the use of magnet, the perhaps use of hood or other similar bracing or strutting arrangement.

First kind of these available schemes is illustrated among Figure 11, and wherein supporting plane 52 is provided with the magnet that is integrated with it in inside, and described magnet is attractive to the surface 41 of being made by metallic plate; Described magnet can be native magnet or electromagnet, and as mentioned above, they can be replaced with hood or other bracing or strutting arrangement that is equal to.

All these modification all belong to the scope of following claim.

Claims

1. a thermal insulation board is characterized in that, it comprises two facing surfaces (4,5; 41,42), be injected at least one described lip-deep first polymerization swollen resin layer (13; 50), by the heat insulation core of making in abutting connection with described layer (13) second polymerization swollen resin (17; 43).

2. plate as claimed in claim 1, wherein, facing surfaces (4,5; 41,42) be level and smooth basically.

3. as claim 1 and 2 described plates, comprise the peripheral annex (49) of filling by the swollen resin layer (50) of described spraying along the edge.

4. the described plate of claim as described above, wherein, surface (4,5; 41,42) be metallic plate.

5. method that is used for producing continuously thermal insulation board, this method may further comprise the steps:

-vertically advance top bars (5) and lower strip (4) with overlapping basically state;

-between lath (4,5), apply the expanded polymeric resin that is essentially liquid; And

Resin is expanded, and the preset distance with the plate thickness that is substantially equal to produce is spaced apart from each other lath (4,5) simultaneously;

It is characterized in that this method comprises the step that goes up injection expanded polymeric resin at least one lath (4,5).

6. method as claimed in claim 5 wherein, applies the resin that is essentially liquid state on by that spray and layer (13) that resin demi-inflation at least forms.

7. as claim 6 and 7 described methods, wherein, the resin of injection is a quick-reaction type.

8. as the described method of claim 5 to 7, wherein, the lath that sprays the fast reaction expandable resin thereon is lower strip (4).

9. the described method of claim as described above, wherein, lath (4,5) is made of metal.

10. the described method of claim as described above, wherein, the resin that applies is the polyurethane resin of a kind of component or two kinds of components.

11. produce the equipment of plate according to the method for aforementioned claim, it is characterized in that this equipment comprises the device (9,10 that is used to spray the first expanded polymeric resin; 30) and be used at least one lath (4), applying basic device (11,12 for the second liquid expanded polymeric resin; 31).

12. equipment as claimed in claim 11 wherein, is used to spray the device (9,10 of first resin; 30) be arranged in and be used to apply basic device (11,12 for the second liquid resin; 31) upstream.

13. as claim 11 and 12 described equipment, wherein, the device that is used to spray first resin comprises the shower nozzle (9) that the direction of advance with respect to the lath (4) of sprayed resin on it can laterally move back and forth.

14. as claim 11 and 12 described devices, wherein, the device that is used to spray first resin comprises fixed nozzle bar (30), its direction of advance transverse to lath (4,5) that should sprayed resin is extended.

15. be used for the discontinuous production method according to the described thermal insulation board of claim 1 to 4, this method may further comprise the steps:

-go up injection expanded polymeric resin bed (50) at least one surface (41,42);

-apply the expanded polymeric resin that is essentially liquid condition;

-liquid resin is expanded, simultaneously outer surface (41,42) is remained in the mould and be spaced apart from each other with the preset distance of the thickness that is substantially equal to produce plate.

16. method as claimed in claim 15 wherein, applies the resin that is essentially liquid on that spray and resin bed (50) demi-inflation at least.

17. as claim 15 and 16 described methods, wherein, the resin of injection is a quick-reaction type.

18. as the described method of claim 15 to 17, wherein, expandable resin is the polyurethane resin of a kind of component or two kinds of components.

19. as the described method of claim 15 to 18, wherein, the surface of sprayed resin (41) are supported by supporting plane (52) thereon, this plane is provided with and is used at the vacuum device of described lower face (54), to avoid occurring from the teeth outwards unevenness.

20. as the described method of claim 15 to 18, wherein, the surface of sprayed resin (41) are supported by supporting plane (52) thereon, this plane is provided with the magnet type device (64) that works in described lower face, to avoid occurring from the teeth outwards unevenness.

21. as claim 19 and 20 described methods, wherein, supporting plane (52) can move with respect to the nozzle (30) of sprayed resin.