CN1127187A

CN1127187A - Method and apparatus for making mold pressed products

Info

Publication number: CN1127187A
Application number: CN95116649A
Authority: CN
Inventors: E·蒙克; H·胡伯
Original assignee: Werzalit AG and Co KG
Current assignee: Werzalit AG and Co KG
Priority date: 1994-08-27
Filing date: 1995-08-24
Publication date: 1996-07-24
Also published as: DE4430528A1; DE4430528C2; TR199501062A2; KR100354811B1; KR960007129A; TW299277B; JPH08169027A; MY119246A

Abstract

The invention relates to a method and a device which can press molded parts by using a non-fluid mixture that is prepared by wood chips or fibers and thermosetting bonding agents. One part of the heat energy which is needed for thermosetting is provided by the hot gas or steam which is input into the mixture during the pressing process. The hot gas or the steam is input along the direction which is tilted with the pressure direction.

Description

Make the method and apparatus of molding

The present invention relates to a kind of illiquidity mixture that is made into wood chip and/or fiber and thermohardening binding agent and make the method for molding.Compacting of the pressing mold of sealing and sclerosis around this mixture is put on the forming press, the required heat energy at least a portion of hardening is to provide by hot gas or the steam that is input in pressing process in the mixture.

EP-A-0 443 053 has proposed a kind of said method.This method is that the mixture with illiquidity is pressed into molding in hot pressing under the effect of pressure and heat.In this known method proposes hot gas or steam mainly is input to mixture in the pressing mold along a direction vertical with direction of exerting pressure.This measure can be input to hot gas or steam in the pressing mold of sealing fast and equably, thereby can make the time of exerting pressure and firm time drop to bottom line.

Though having facts have proved this method is gratifying substantially, but may occur that: when hot gas or steam are defeated by mixture by air inlet pipe, part mixture is attached on the air inlet mouth of pipe and may stops up the mouth of pipe, thereby hinder the input uniformly rapidly of hot gas or steam, during particularly when the mouth of pipe sizableness of the wood chip of mixture or fiber and air inlet pipe or less than the mouth of pipe, easier this thing happens.

Task of the present invention is to improve said method, and the mouth of pipe of air inlet pipe is not stopped up.

According to the present invention, this technical problem is to solve like this: in hot gas or steam mainly are input to mixture in the pressing mold along a direction with the direction of exerting pressure inclination.

Prove that in the practice of this know-why gas or steam both can be input in the mixture in the pressing mold quickly and evenly, can reduce the air inlet pipe possibility of jamming greatly again.This obviously is owing to act on the little of the above-mentioned known method of branch force rate on the mixture particulate, thereby the also less cause of the particulate that adheres on the air inlet mouth of pipe.In addition, even still might take away attached to the forming press parts that the particulate on the mouth of pipe also can be slipped over the mouth of pipe.

Favourable details more of the present invention, the device of particularly implementing this method will be included among the claim 2-9.Below in conjunction with Fig. 1-3 in detail the present invention is described in detail:

Fig. 1 represents to have an embodiment of the forming press of feature of the present invention;

Fig. 2 represents to have another embodiment of the forming press of feature of the present invention;

Fig. 3 represents another embodiment with reference to Fig. 1 forming press.

Forming press shown in Figure 1 is made up of counterdie 1 and punch die 2, and its present position is: oneself use the mixture filling die cavity of counterdie 13, and punch die 2 is just along the decline of direction shown in the arrow 4, and the mixture in the compacting die cavity 3.Mixture after the compacting, the height of the molding that promptly is pressed into is shown in dotted line among the figure 5.Forming press shown in Figure 1 is used for suppressing block or tabular molding.

The illiquidity mixture is preferably mixed by the fiber that closes lignocellulosic (as the dried wood chips of fragmentation, sugarcane fiber etc.) and a kind of artificial resin (as melamine urea-formaldehyde resin or phenolic resins) of thermohardening.If the molding that requires to make has certain elasticity, then binding agent also can contain the composition of thermoplastic.Substitute broken dried wood chips or sugarcane fiber, the fiber of available other materials, as glass fibre, asbestos fibre etc., separately with or with the mixture of multiple this fibrid, and add suitable binding agent, preferably organic binder bond.

As can be seen from Figure 1, in counterdie 1 and the punch die 2 conduit 6 is arranged all, the vapours that adds hot-pressing machine is sent into by these conduits.In addition, have in the counterdie 1 and be responsible for 7, pick out the hot gas that links to each other with die cavity 3 or the air inlet pipe 8 of steam thus.The air inlet pipe 8 of dotted line more than 5 is downward-sloping, promptly with the about inclination angle at 45 of the direction of exerting pressure shown in the arrow 4.Have only the air inlet pipe 9 of dotted line 5 belows to be only level.

Fig. 2 represents another embodiment of forming press, for example is used for suppressing the molding of annular.As shown in the figure, die cavity 10 has filled the preceding mixture of molding compacting.Forming press is made up of for example punch die 11, patrix 12 and the die cap 13 of annular.When packing mixture into die cavity 10, die cap 13 can be opened.When power vertically acted on die cap 13, patrix 12 moved downward, and punch die 11 is pressed in the die cavity 10 simultaneously, thus compacting mixture.Arrow 14 expression direction of exerting pressure.And for example shown in Figure 2, in the punch die 11 of this forming press, patrix 12 and the die cap 13 conduit 6 is arranged all, the effect of these conduits is identical with Fig. 1 forming press.In addition, in patrix 12, be responsible for 7 and air inlet pipe 8 in addition.The air inlet pipe 8 same and about inclinations angle at 45 of direction of exerting pressure (arrow 14).

Device shown in Figure 3 is another embodiment of Fig. 1 forming press, and for example this forming press can be used to suppress the pallet that EP-A-0 179 927 proposes.This pallet mainly is made up of a levelling bench that has several tapers or the hollow leg of pyramid.Fig. 3 forming press is made up of the fixing counterdie 15 and the patrix 16 of vertical motion.The position of forming press shown in the figure represents that patrix 16 has entered counterdie 15, and promptly molding is repressed finishes.As shown in Figure 3, counterdie 15 has several recesses 17, and its number is identical with supporting plate leg number, and patrix 16 then has the protuberance 18 of respective number.Can find out that also counterdie 15 also image pattern 1 is provided with the person in charge 7 and air inlet pipe 8 like that.16 of patrixes are provided with a person in charge 19 who always reaches protuberance 18, are responsible for the

air inlet pipe

20 and 21 of stretching out the die cavity 22 that feeds counterdie 15 from this root.The air inlet pipe 20 of this embodiment is inclined upwardly, and air inlet pipe 21 is then downward-sloping.

Claims

1. the illiquidity mixture that is made into wood chip and/or fiber and a kind of thermohardening binding agent is made the method for molding, this method is the pressing mold that mixture is put into sealing around the forming press is suppressed and to be hardened, the required heat energy at least a portion of hardening is that hot gas or the steam by input mixture in pressing process provides, it is characterized in that, in hot gas or steam are input to mixture in the pressing mold along a direction that tilts with direction of exerting pressure.

2. method according to claim 1 is characterized in that, airintake direction and direction of exerting pressure inclination angle at 45 approximately.

3. implement device, it is characterized in that as method as described in claim 1 and 2:

A) a fixed cup-shaped counterdie (1) has a die cavity (3);

B) punch die of an activity (2) is vertically by die cavity (3);

C) on the wall of the counterdie (1) parallel with direction of exerting pressure many air inlet pipe (8) are arranged, they are being connected a hot gas or steam air accumulator at least with one the person in charge (7) links to each other.

4. device according to claim 3 is characterized in that, is contained in air inlet pipe 8 and direction of exerting pressure (4) inclination angle at 45 approximately in the inwall scope of the counterdie that punch die (2) passed through.

5. according to claim 3 and 4 described devices, it is characterized in that, be contained near the air inlet pipe (9) in counterdie (1) bottom perpendicular to direction of exerting pressure (4).

6. implement device, it is characterized in that as method as described in claim 1 and 2:

A) patrix that moves both vertically (12) has a die cavity (10);

B) a fixing punch die (11) is by die cavity (10);

C) on the wall of the patrix (13) parallel with direction of exerting pressure (14) many air inlet pipe (8) are arranged, they are being connected a hot gas or steam air accumulator at least with one the person in charge (7) links to each other.

7. device according to claim 6 is characterized in that, punch die (11) the air inlet pipe (8) and direction of exerting pressure (14) inclination angle at 45 approximately in the inwall scope of patrix (12) of process.

8. device according to claim 3, it is characterized in that, a plurality of recesses (17) are arranged at the bottom of counterdie (15), the lower surface of patrix (16) then has the protuberance (18) of as much corresponding with recess (17) respectively, and in each protuberance (18), have a person in charge (19) at least, be responsible for the edge that the air inlet pipe (20,21) that connects extends to protuberance (18) always therewith.

9. device according to claim 8 is characterized in that, the air inlet pipe (20) in protuberance (18) upper extent is inclined upwardly, and the air inlet pipe (21) on protuberance (18) top is then downward-sloping.