KR101688216B1 - Method and Apparatus for Vacuum Crushing the Foam - Google Patents

Abstract

A foam foam vacuum crushing apparatus and method are provided.
The present invention relates to an apparatus for vacuum crushing foam foam, comprising: a conveyor belt on which at least one foam foam is placed on an upper surface; A vacuum chamber in which a lower end opened on an upper surface of the conveyance belt is in contact with the conveyance belt to form a closed space; A vacuum source connected to the vacuum chamber so as to generate an external force that destroys the cell of the foamed foam to convert the closed space into a vacuum atmosphere; And at least one suction hole communicating with a space between the close plate and the conveyance belt and the closed space is formed through the conveyance belt so as to correspond to the lower surface of the conveyance belt, The vacuum suction force generated in the vacuum cleaner is converted into a close contact force by which the conveyance belt is tightly fixed to the close plate. .

Description

FIELD OF THE INVENTION [0001] The present invention relates to a vacuum crushing apparatus,

The present invention relates to an apparatus and a method for crushing a foamed foam by a vacuum method. More particularly, the present invention relates to an apparatus and method for crushing a foamed foam by a simple design deformation of a conveyance belt to convert a vacuum suction force, To a foam foam vacuum crushing apparatus and method capable of preventing excessive expansion and contraction and maximizing the vacuum pressure.

Generally, polyurethane foam is foamed due to the carbon dioxide generated during the course of the crosslinking reaction, has high mechanical strength, and is excellent in heat resistance, solvent resistance, aging resistance and adhesiveness. It is manufactured from very soft elasticity to hard abrasion resistance.

The polyurethane foam is divided into three types of soft, semi-rigid, and rigid, depending on its hardness. The soft foam is used for cushion materials for automobiles, fillers, filters and the like.

However, a settling phenomenon occurs in which the height of the foam is reduced to an observable level immediately after the maximum degree of swelling in the process of free foaming of the flexible foam. This phenomenon occurs when a crossing cell closing cell is excessively increased, which is a cause of defects in the articles produced after the foaming molding.

Therefore, in order to prevent the settling phenomenon, a crushing process is required to artificially open the cells inside the foamed foamed product (hereinafter referred to as foamed foam) to discharge the gas inside the foamed foamed product .

Conventionally, by injecting a foamed foam drawn out from a mold into a vacuum crusher and operating a vacuum generator connected to the vacuum crusher by a pipe, the interior of the vacuum crushing is converted into a vacuum atmosphere, And then the gas was broken out by an external force to discharge the gas to the outside.

The vacuum crusher is provided in cooperation with a belt conveyor facility in which the circulation belt is circulated in an infinite track manner, thereby switching the upper space of the circulation belt on which the foam foam is placed to a vacuum pressure atmosphere, and then circulating the crushed foam foam And transferred to the next process by a belt.

However, when the foamed foam is lifted and the vacuum crushing device is brought into contact with the circulating belt, the circulating belt is sucked into the vacuum crushing device by the vacuum pressure generated in the crushing process, and is stretched and deformed. Since the expansion and contraction is repeated, the service life is shortened and the replacement cycle is shortened, which is a factor for raising the facility maintenance cost.

Also, since the vacuum crushing apparatus has a limitation in raising the internal pneumatic pressure, the crushing process for a foamed foam having a large volume within a limited space is not performed smoothly, which has limitations in increasing the crushing efficiency.

In the case of applying a belt having a high hardness and a thick thickness to extend the service life of the circulating belt by reducing the expansion and contraction amount due to the vacuum pressure during the crushing process, the belt circulation in the infinite track is not smoothly performed, There is a problem in that productivity of the work transferred to the process is lowered.

In addition, since the belt material having a large thickness or a high hardness is relatively higher than the price of a general belt member, it has a factor of raising the overall manufacturing cost.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a vacuum cleaner which is capable of reducing a vacuum suction force generated in a belt member upon vacuum crushing, And to provide a foam foam vacuum crushing apparatus and method capable of maximizing the vacuum pressure.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

As a specific means for accomplishing the above object, a preferred embodiment of the present invention is an apparatus for vacuum crushing foam foam, comprising: a conveyance belt on which at least one foam foam is placed on an upper surface; A vacuum chamber in which a lower end opened on an upper surface of the conveyance belt is in contact with the conveyance belt to form a closed space; A vacuum source connected to the vacuum chamber so as to generate an external force that destroys the cell of the foamed foam to convert the closed space into a vacuum atmosphere; And at least one suction hole communicating with a space between the close plate and the conveyance belt and the closed space is formed through the conveyance belt so as to correspond to the lower surface of the conveyance belt, The vacuum suction force generated in the vacuum cleaner is converted into a close contact force by which the conveyance belt is tightly fixed to the close plate. The present invention also provides a foamed foam vacuum crushing apparatus.

Preferably, the suction hole may be formed to pass through the upper surface of the conveyance belt so that the lower end of the suction hole is located in the closed space.

Preferably, the suction holes may be formed in a plurality of through holes at predetermined intervals along the conveying direction on both side edges of the conveyance belt spaced from the central area of the conveyance belt on which the foamed foam is stacked.

Preferably, the fastening plate may be a plate having both side ends fixed to the first conveyor frame on which the conveyance belt is installed so as to be spaced apart from the lower surface of the conveyance belt by a predetermined distance.

Preferably, the fastening plate may be a plate having both ends thereof vertically movably assembled to slots formed in a first conveyor frame on which the conveyance belt is installed so as to be spaced apart from the lower surface of the conveyance belt.

Preferably, the vacuum chamber includes an up-and-down operation part for vertically moving the vacuum chamber so as to contact with or away from the conveyance belt, wherein the up-and-down operation part comprises: an upper cylinder for assembling a rod end to the vacuum chamber; A cylinder frame having a fixing plate extending upward from the frame and fixed to the upper and lower cylinders and a plurality of guide bars connected to a lower end of the vacuum chamber to be movable up and down on a guide bush provided on the fixing plate, .

More preferably, the up-and-down operation unit may include a connection ring connecting the upper ends of the plurality of guide bars.

Preferably, the vacuum chamber may have a contact member which is uniformly in surface contact with the upper surface of the conveyance belt at an open bottom edge.

Further, a preferred embodiment of the present invention is a method of vacuum crushing a foam foam, comprising the steps of: placing at least one foam foam on the upper surface of the conveyance belt; Forming an airtight space on the upper surface of the conveyance belt by contacting an open lower end of the vacuum chamber; Converting the closed space into a vacuum atmosphere by a vacuum generating source communicating with the vacuum chamber to generate an external force that destroys the cell of the foamed foam; And

And a vacuum generated in the closed space by at least one suction hole formed in the conveyance belt so as to communicate between the space and a space formed between the close contact plate and the conveyance belt corresponding to the lower surface of the conveyance belt, Closing the lower surface of the conveyance belt by tightly attaching the conveyance belt to the upper surface of the fastening plate by switching the suction force to a close fixing force; The present invention also provides a foamed foam vacuum crushing method.

Preferably, the tightening and fixing step is carried out by a pressure drop generated due to a discharge speed of the gas passing through the spacing space, and is conveyed to a fastening plate having both side ends fixed to the first conveyor frame on which the conveyance belt is installed The belt can be relatively moved and tightly fixed.

Preferably, the step of adhering and fixing may be performed by a pressure drop generated due to a discharge velocity of the gas passing through the spacing space, Can be relatively moved toward the conveyance belt side and can be tightly fixed.

Preferably, after the closing and fixing step, external air is forcedly injected into the closed space in a state of releasing the vacuum atmosphere of the closed space to separate the open lower end of the vacuum chamber from the upper surface of the conveyance belt .

The present invention as described above has the following effects.

(1) Since the suction hole for discharging the gas is formed on the conveyance belt on which the foam foam is placed, the conveyance belt can be closely fixed to the fastening plate by the vacuum suction force generated inside the vacuum chamber, so that the foam foam is vacuum crushed It is possible to prevent excessive deformation of the belt member in the process, thereby extending the service life of the belt member and reducing maintenance and maintenance costs.

(2) The vacuum crushing process that converts the closed space between the vacuum chamber and the transfer belt into a vacuum atmosphere can maximize the vacuum pressure of the closed space, thereby enhancing the process efficiency of vacuum crushing the foam foam.

1 is a perspective view showing a foam foam vacuum crushing apparatus according to a preferred embodiment of the present invention.
FIG. 2 is a perspective view of a foam foam vacuum crushing apparatus according to a preferred embodiment of the present invention, viewed from a different angle. FIG.
3 is a plan view showing a conveyance belt and a fastening plate used in a foam foam vacuum crushing apparatus according to a preferred embodiment of the present invention.
4 is a front view showing a foam foam vacuum crushing apparatus according to a preferred embodiment of the present invention.
5 is a side view showing a foam foam vacuum crushing apparatus according to a preferred embodiment of the present invention.
6A to 6D are process drawings showing a foam foam vacuum crushing apparatus according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

1 to 5, a foam foam vacuum crushing apparatus 100 according to a preferred embodiment of the present invention breaks a cell of a foamed foam foam by an external force caused by a vacuum pressure, A vacuum chamber 120, a vacuum generating source 130, and an adhesion fixing unit 140 so as to perform a vacuum crushing process for discharging the vacuum chamber 120 to the outside.

The conveyor belt 110 is a belt member on which at least one foam foam F, which is a subject of vacuum crushing, is raised on the upper surface.

The conveyor belt 110 is disposed on the exit side of a process for producing a foamed foam such as a seat pad, and is capable of conveying the vacuum-crushed foamed foam to a post-process in addition to the vacuum crushing process for the foamed foam (F) And a belt member circulated in an endless track manner in one direction by a first driving source.

The conveyor belt 110 includes a driven shaft 112 rotatably assembled to one end of the first conveyor frame 113 and a driven shaft 112 connected to the first drive source 111 to rotate at the other end of the first conveyor frame 113 And is connected between drive shafts 114 that are assembled as much as possible.

The main conveyor belt 115 is circulated in an infinite track manner in one direction by a second driving source so that the foamed foam F that has been vacuum-crushed can be conveyed to a post-process, The frame 116 can be disposed.

Accordingly, the foamed foam placed on the upper surface of the conveyance belt 110 is vacuum-crushed in a sealed space between the vacuum chamber 120 and the conveyance belt 110 in a suspended state, Can be transported to the main transport belt 115 and transported to a subsequent process.

The vacuum chamber 120 is in contact with a lower end opened on the upper surface of the conveyance belt 110 temporarily stopped for vacuum crushing, thereby forming a closed space with the conveyance belt.

The vacuum chamber 120 may be formed of a box body having a lower end opposed to the conveyor belt 110. The upper and lower operation parts 120a may be vertically movable such that the lower end of the conveyor belt contacts or separates from the conveyor belt. And may be provided directly above the conveyance belt 110.

The upper and lower actuating part 120a includes upper and lower cylinders 121 to which a rod end is assembled via a joint 121a at an upper portion of the vacuum chamber 120. A first conveyor And a cylinder block 122 extending upward from the frame 113 and having a fixing plate 122a fixedly installed with the upper and lower cylinders 121. A lower end of the cylinder frame 122 is connected to an outer surface of the vacuum chamber 120, A plurality of guide bars 123 mounted on the guide bushes 123a provided on the guide bushes 122a so as to be vertically movable and a connecting ring 124 connecting the upper ends of the plurality of guide bars 123, .

The vacuum chamber 120 may be provided with a contact member 125 at an upper end of the conveyor belt 110 so as to be uniformly in contact with the upper surface of the conveyor belt 110.

At this time, the contact member 125 may be made of a rubber material and an elastic body so as to be elastically deformed when the vacuum chamber is brought into close contact with the conveyance belt due to the fall of the vacuum chamber, thereby increasing the adhesion.

In addition, a pressure gauge (not shown) is installed on the upper outer surface of the vacuum chamber 120 to measure the internal vacuum pneumatic pressure in the vacuum crushing process in real time, and to transmit the measured pressure value to the control panel 127 provided on one side of the cylinder frame 126).

Accordingly, when the upper and lower cylinders 121, which have been waiting for a rise in a state where the conveyance belt 110 on which the foam foam F is mounted, are temporarily stopped, the vacuum chamber 120, The foamed foam is brought into contact with the upper surface of the transport belt on which the foamed foam is placed, thereby forming a closed space S1 for receiving the foamed foam.

The vacuum generating source 130 includes a vacuum suction line 132 connected to one end of the vacuum chamber 120 so as to generate an external force for destroying the inner cell of the foam foam F and discharging the gas to the outside Thereby converting the closed space S1 into a vacuum atmosphere lower than atmospheric pressure.

The vacuum generating source 130 includes at least one vacuum suction line 132 having one end communicated with an upper outer surface of the vacuum chamber to generate a vacuum suction force during operation by power application to force the gas filled in the closed space And the inside of the closed space is switched to a vacuum atmosphere having a vacuum of a certain size by suction.

Accordingly, the foam foam (F) disposed in the closed space between the conveyance belt and the vacuum chamber is contracted in volume due to external force due to the vacuum pressure lower than atmospheric pressure, and at the same time, the cell formed therein is broken, The vacuum crushing process is performed.

The tightly adhered portion 140 includes a tightly coupled plate 142 horizontally fixed to the first conveyor frame 113 to correspond to the lower surface of the conveyor belt 110 at a predetermined distance, (S1) formed between the conveyance belt and the vacuum chamber and a spacing space S2 formed between the conveyance belt 110 and the conveyance belt 110. [ And at least one suction hole (141).

At this time, the suction hole 141 is formed through the conveyance belt so as to be positioned in a closed space S1 formed by contacting a lower end opened on the upper surface of the conveyance belt, and the foam foam F is raised, And a plurality of conveyance belts spaced apart from each other in the longitudinal direction of the conveyance belt are formed at both sides of the conveyance belt spaced apart from the central area of the conveyance belt.

In order to form a spacing space through which the gas escapes through the suction hole during the vacuum crossing process by the vacuum generator, the adhesion plate 142 is spaced apart from the lower surface of the conveyance belt by a predetermined distance, 113) having a substantially rectangular plate shape and both side ends thereof being replaceably assembled.

Accordingly, when the gas in the closed space formed between the conveyance belt 110 and the vacuum chamber 120 is forcibly sucked by the vacuum generating source 130 and discharged from the inside of the vacuum chamber to the outside, The gas in the spacing space S2 formed between the conveyance belt and the closing plate through the holes 141 is also discharged to the outside through the closed space S1.

When the gas in the spacing space S2 formed between the lower surface of the conveyance belt 110 and the upper surface of the tightening plate 142 is discharged to the outside through the suction hole 141, The conveyance belt 110 is moved to the lower side with respect to the fastening plate 142 to be fixed to the upper surface of the fastening plate 142 because the pressure of the conveyance belt 110 is lowered due to the gas velocity, It is in close contact.

When the conveyance belt 110 is brought into close contact with the upper surface of the fastening plate, the suction hole formed through the conveyance belt is closed by the fastening plate, so that the spacing space formed between the vacuum chamber and the conveyance belt is the external space Is a completely enclosed space that can not be introduced.

In this state, when the gas filled in the closed space S1 is forcedly sucked to the outside by the vacuum generating source, the internal atmosphere of the closed space S1 is switched to a vacuum atmosphere lower than the atmospheric pressure, So that the shell formed inside the foamed foam is blown up by the vacuum pressure, and the vacuum crushing process for discharging the gas to the outside can be stably performed.

At this time, since the lower surface of the conveyance belt is firmly fixed to the upper surface of the close plate due to the vacuum suction force transmitted to the closed space, during the process of vacuum crushing the foam foamed on the conveyance belt, The horizontal state can be maintained without being elastically deformed or broken up to the upper part.

Since the tight fitting force of the conveyance belt closely fixed to the close plate can increase in proportion to the vacuum suction force generated in the closed space between the vacuum chamber and the conveyance belt, the vacuum pressure inside the closed space can be increased to the maximum The maximum value corresponding to the output value can be raised, and the vacuum crushing efficiency can be increased.

Meanwhile, the number of suction holes and the total opening area located inside the closed space are determined by the time when the lower surface of the conveyance belt is tightly fixed to the upper surface of the close plate, or between the lower surface of the conveyance belt and the upper surface So as to take into account the discharge speed of the gas exiting through the suction hole.

6A, the process of crushing the foamed foam F by the vacuum suction force using the apparatus 100 according to the preferred embodiment of the present invention is performed by using a conveyor belt 110) is placed on the upper surface of the foaming foam (F).

As shown in FIG. 6B, the vacuum chamber 120 is lowered by the operation of the upper and lower cylinders of the upper and lower operation parts, so that the lower end of the vacuum chamber is opened Thereby forming a closed space S1 in which the foamed foam is disposed between the vacuum chamber 120 and the conveyance belt 110. [

6 (c), when the gas in the closed space is forcibly sucked to the outside by the operation of the vacuum generating source 130 communicating with the vacuum chamber 120 through the vacuum suction line 132, The closed space is converted into a vacuum atmosphere, and an external force for breaking the cell of the foamed foam is generated to perform a vacuum crushing process.

At this time, a gas exiting through the suction hole 141 formed through the conveyance belt 110 is separated from the conveyance belt by a gap S2 formed between the lower surface of the conveyance belt and the upper surface of the close- The pressure of the spacing space S2 becomes lower than the atmospheric pressure so that the lower surface of the conveying belt is brought into close contact with the upper surface of the conveying belt and at the same time the suction hole is blocked .

The conveyance belt 110 is tightly fixed to the upper surface of the tightening plate 142 by increasing the tightening force of the lower surface of the conveying belt in close contact with the upper surface of the conveying belt in proportion to the vacuum suction force generated in the closed space S1, 142, the vacuum crushing process for the foamed foam can be performed stably.

In this case, the conveyance belt 110 is illustrated as being moved in close contact with the fixed plate 142, but the present invention is not limited thereto. The gas discharged through the suction holes may pass through the spacing space S2 The adhesion plate 142 is moved upward by a pressure drop caused by the discharge speed and is brought into close contact with the lower surface of the conveyance belt 110 and the suction hole can be closed when the conveyance belt is closely contacted.

Here, the upper and lower contact plates 142 can be vertically movably mounted on the vertical frames formed through the horizontal frame of the first conveyor frame 113 provided with the conveyance belt, The height at which the conveying belt 142 is moved up to the maximum can be restricted by the slot so as to be moved to a height corresponding to the horizontal conveying line of the conveyance belt 110.

6D, when the vacuum suction operation of the vacuum generating source 130 is stopped to release the vacuum atmosphere generated in the sealed space between the conveyance belt 110 and the vacuum chamber 120, The suction hole 141 is opened because the conveyance belt 110 is spaced apart from the close contact plate 142 to form a spacing S2.

At this time, external air is forcibly injected into the closed space S1 while the vacuum atmosphere of the closed space is released, so that the lower end of the vacuum chamber 120, which is opened on the upper surface of the conveyance belt 110, And the conveyance belt 110 can be forced apart.

At the same time, the vacuum chamber 120 is raised and lowered by the upper and lower cylinders of the upper and lower operation parts, and the vacuum foamed foam is conveyed to the adjacent main conveyance belt by the circulation operation of the conveyance belt, The foamed foam is loaded on the upper surface of the conveyance belt to repeatedly perform the vacuum crushing operation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

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110: conveying belt
111: first driving source
112:
113: first conveyor frame
114: drive shaft
115: Main conveying belt
120: vacuum chamber
120a:
121: Upper and lower cylinder
122: Cylinder frame
122a: Fixing plate
123: Information Bar
124: connecting ring
130: Vacuum source
132: Vacuum suction line
140:
141: suction hole
142: Clamping plate
S1: Enclosed space
S2: Spacing space

Claims (12)

An apparatus for vacuum crushing foamed foam,
A conveyor belt on which at least one foam foam is placed on an upper surface;
A vacuum chamber in which a lower end opened on an upper surface of the conveyance belt is in contact with the conveyance belt to form a closed space;
A vacuum source connected to the vacuum chamber so as to generate an external force that destroys the cell of the foamed foam to convert the closed space into a vacuum atmosphere; And
At least one suction hole communicating with a space between the close plate and the conveyance belt and the closed space is formed through the conveyance belt so as to be in contact with the lower surface of the conveyance belt, A vacuum tightening unit for converting the generated vacuum suction force into a close fixing force for tightly fixing the conveyance belt to the close plate; Wherein the foamed foam crushing device comprises a foamed foam vacuum crushing device. The method according to claim 1,
Wherein the suction hole is formed so as to be located in a closed space formed by contacting a lower end opened on an upper surface of the conveyance belt. The method according to claim 1,
Wherein the suction holes are formed in a plurality of through holes at regular intervals along the conveying direction on both side edges of the conveyance belt spaced from the central area of the conveyance belt on which the foamed foam is stacked. Device. The method according to claim 1,
Wherein the fastening plate is formed of a plate having both side ends fixed to a first conveyor frame on which the conveyance belt is installed so as to be spaced apart from the lower surface of the conveyance belt by a predetermined distance. The method according to claim 1,
Characterized in that the tightening plate is made of a plate having both ends thereof vertically movably assembled to slots formed in a first conveyor frame on which the conveyance belt is installed so as to be spaced apart from the lower surface of the conveyance belt by a predetermined distance Crushing device. 6. The method according to any one of claims 1 to 5,
And an up-down operation portion for vertically operating the vacuum chamber to contact or separate the vacuum chamber from the conveyance belt,
Wherein the upper and lower operation portions include a cylinder block having an upper and lower cylinder in which a rod end is assembled to the vacuum chamber, a cylinder frame extending upward from a first conveyor frame on which the conveyance belt is installed and having a fixed plate fixedly installed thereon, And a plurality of guide bars connected to the guide bushes and vertically movably mounted on the guide bushes provided on the fixing plate. The method according to claim 6,
Wherein the up-and-down operation part includes a connection ring connecting upper ends of the plurality of guide bars. 6. The method according to any one of claims 1 to 5,
Wherein the vacuum chamber comprises a contact member that evenly contacts an upper surface of the conveyor belt at an open bottom edge thereof. A method for vacuum crushing foam foam,
Placing at least one foam foam on the upper surface of the transfer belt;
Forming an airtight space on the upper surface of the conveyance belt by contacting an open lower end of the vacuum chamber;
Converting the closed space into a vacuum atmosphere by a vacuum generating source communicating with the vacuum chamber to generate an external force that destroys the cell of the foamed foam; And
And a vacuum generated in the closed space by at least one suction hole formed in the conveyance belt so as to communicate between the space and a space formed between the close contact plate and the conveyance belt corresponding to the lower surface of the conveyance belt, Closing the lower surface of the conveyance belt by tightly attaching the conveyance belt to the upper surface of the fastening plate by switching the suction force to a close fixing force; Wherein the foaming foam comprises a foamed foam. 10. The method of claim 9,
Wherein the step of adhering and fixing the transfer belt is performed by a pressure drop generated due to a discharge speed of the gas passing through the spacing space so that the conveyance belt is opposed to the fastening plate having both side ends fixed to the first conveyor frame on which the conveyance belt is installed And is fixed in close contact with the foamed foam. 10. The method of claim 9,
Wherein the tightening and fixing step is performed by a pressure drop generated due to a discharge velocity of the gas passing through the spacing space, whereby a closing plate, whose both ends are moved up and down in a long hole formed in the first conveyor frame on which the conveying belt is installed, And then is tightly fixed. 10. The method of claim 9,
After the vacuum tightening of the closed space is released, external air is forcedly injected into the closed space to separate the opened lower end of the vacuum chamber from the upper surface of the conveyance belt Of the foamed foam.

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