JP2900904B2 - Method and apparatus for crushing reinforced plastic - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing method and a crushing apparatus for crushing waste material reinforced plastic to be discarded, and particularly to a so-called hardly crushable reinforced plastic which is considered difficult to crush, for example, typical examples. The present invention relates to a pulverization method and a pulverization apparatus used for pulverizing hard-to-pulverize hard-to-grind waste material-reinforced plastic into a uniform powder form, which is difficult to pulverize such as fiber-reinforced plastic using glass fiber as a reinforcing material.

[0002]

2. Description of the Related Art Waste material reinforced plastic (hereinafter referred to as waste material FRP), which is difficult to grind, has excellent properties such as durability, high strength and light weight, and is widely used in various fields (industry). At the same time, the amount of waste is increasing year by year. Therefore, in recent years, a pulverizing method and a pulverizing apparatus for mechanically pulverizing the waste material FRP have been developed (for example, see JP-A-63-3964).
No. 8). Incidentally, examples of the waste material FRP include fiber reinforced plastic (GFRP) using glass fiber as a reinforcing material, fiber reinforced plastic (CFRP) using carbon fiber as a reinforcing material, and fiber reinforced plastic using organic fiber as a reinforcing material.

[0003]

However, a conventionally known pulverizing method and a pulverizing apparatus, for example, a method disclosed in
In the case of the crushing device disclosed in Japanese Patent No. 39648, the front edge of the support for feeding the waste material FRP to be crushed while mounted on a grindstone (referred to as a processing tool),
Since it is a structure that crushes waste FRP while simply approaching the cutting surface of the grindstone, it is impossible to crush all the waste particles to a uniform particle size, and it becomes a crushed residual piece such as a cut piece or a coarse crushed piece. And mixed into the regenerated powder ground to a uniform particle size. For this reason, conventionally, it is necessary to perform post-processing to remove the remaining crushed pieces mixed in the regenerated powder after the crushing process, and the time and labor required for the subsequent processing are immeasurable, which increases the processing cost. It is a fact that the cost increase is a major problem as a cause. However, the reuse of the crushed waste material FRP as a recycled powder resource is used, for example, by mixing it with cement-based inorganic material or recycling it to FRP, etc., but especially by mixing it with cement-based inorganic material. In the case of compounding or the like which is also reused together, if the particle size of the pulverized regenerated powder is not uniform, there is a possibility that the properties such as the original strength of the cement-based inorganic material are adversely affected. For this reason, the use of waste material FRP, which is discarded in a grinding process in which regenerated powder is not mixed with remnants and the like of which shapes and sizes are greatly different from each other as much as possible and in which the variation in particle size does not occur as much as possible, will be considered in the future. It was just what I wanted.

[0004] The present invention has been made in view of such a conventional situation, and an object thereof is to provide a pulverization method and a pulverization apparatus improved so as to be able to pulverize waste FRP into powder having a uniform particle size. To provide.

[0005]

Means for Achieving the Object In order to achieve the object, a technical measure taken by the present invention is to press a front edge of a guide base made of waste material FRP against a vertically rotating grindstone so that the front edge has an irregular shape on the surface of the grindstone. This is a grinding method in which the waste material FRP is fed along a guide base to a rotating grindstone and then plunge-ground while being pressed against the guide base after grinding to a suitable contact state. According to such a pulverizing method, when the waste material FRP is sent to a vertically rotating grindstone along the guide base and pressed, the waste material FRP is ground into a powder having a uniform particle size while being plunge-ground by the grindstone. At this time, the grinding powder of the waste material FRP plunge-ground by the grindstone, that is, the reclaimed powder passes through the fitting unevenness of the front edge of the guide base, which fits in contact along the uneven shape formed of the abrasive grains protruding from the grinding surface of the grindstone surface. Collected. Thereby,
Only the regenerated powder plunge-ground with a uniform particle size is collected. In addition, since the guide base is made of the same material as the waste material FRP to be pulverized, even if its front edge is ground by a grindstone, it does not become a foreign material of a different material and does not mix with the recovered recycled powder.

In addition, a feed path for sequentially feeding a large number of waste materials FRP toward a grindstone rotating in a longitudinal direction is provided, and in the grinding process in which the last waste material FRP fed through the feed path is plunge-ground, the feed path is opened. This is a pulverization method in which a dummy FRP made of waste material FRP having substantially the same cross-sectional shape as the cross-sectional shape is fed so that plunge grinding of the last waste material FRP is completed. According to such a pulverizing method, a large number of waste materials FRP are fed through a feed path toward a grindstone that rotates vertically, and in the process of plunge grinding the finally sent waste material FRP, the waste material FRP is connected to the waste material FRP, and the same material is used. By sending the dummy FRP into the feed path, all the waste material FRP sent last can be sent to the grindstone, pressed, and crushed into powder by plunge cutting. At this time, the front end of the dummy FRP is ground into a cylindrical shape along the surface of the grindstone that rotates vertically, but is made of the same material as the waste material FRP. Absent. The dummy FRP whose front end has been ground into a cylindrical shape is reused at the time of the next pulverization processing of the waste material FRP.

Further, a state in which a vertically rotating grindstone and a guide base made of waste material FRP are held horizontally and the front edge thereof is pressed against the vertically rotating grindstone, and a suitable contact is made along the uneven shape of the grindstone surface. A base feed mechanism that fixes and holds the guide base at the same position when the front edge of the guide base is ground, and a material automatic feed mechanism that feeds the waste material FRP toward the grindstone along the guide base. It is a crushing device provided. According to such a crusher,
The guide base made of waste material FRP is pressed by a base feed mechanism against a grindstone that rotates vertically until its front edge fits along the uneven shape of the grindstone surface, and the front edge is ground by the grindstone and protrudes from the grinding surface of the grindstone surface At the time when they are fitted and contacted along the uneven shape composed of the scattered abrasive grains, they are fixed and held at the same position by the base feed mechanism. In other words, the front edge of the guide base is kept in a state of being fitted and contacted along the uneven shape of the grindstone surface. Thereby, in a state where the plunge is not ground into a powder having a uniform particle size by the grindstone, for example, it does not pass between the guide base and the grindstone in a state of a crushed residual piece such as a cut piece or a coarse crushed piece. After being pulverized into a powder having a uniform particle size, the powder is recovered through the matching unevenness at the front edge of the guide base, which fits along the uneven shape of the grinding wheel surface. Then, the waste material FRP is pressed against the whetstone while being automatically fed toward the whetstone by the automatic material feeding mechanism, and is crushed by plunge grinding.

In addition, a feed path for sequentially feeding waste materials FRP having an appropriate cross-sectional shape and at least a bottom opening from the casing portion covering the vertically rotating grindstone toward the grindstone is horizontally connected. This is a crushing device provided with a guide base held by a base feeding mechanism along the bottom of the opening so as to be horizontally movable in the front-rear direction of the feeding path.
According to such a crushing device, the waste material FRP is pressed while being automatically fed to the grindstone by the material automatic feed mechanism as described above through the feed passage horizontally connected from the casing portion covering the grindstone, and is uniformly pressed by plunge cutting. It is pulverized into a powder. In the process of completing the plunge grinding of the finally sent waste material FRP, a dummy FRP made of the waste material FRP formed to have substantially the same cross-sectional shape as the opening cross-sectional area of the feed path.
Is fed into the feed path in tandem with the last waste material FRP, so that all the finally sent waste material FRP can be pulverized to be pulverized into powder having a uniform particle size.

Further, the pulverizing device is provided with a collecting port provided at a lower side of the casing portion which covers the grindstone, and a suction device is connected to the collecting port. The recovery port is ground by the rotation of the grindstone through the matching irregularities on the front edge of the guide base, where the grinding powder, which has been ground into a powder of uniform particle size by plunge grinding, that is, the regenerated powder conforms to the irregularities on the surface of the grindstone. It is preferably provided on the lower side of the casing. According to such a crushing device, as described above, the regenerated powder of the waste FRP which is pressed while being automatically fed toward the grindstone through the feed path by the material automatic feed mechanism and crushed into a powder having a uniform particle size by plunge cutting is used. The suction is collected by a suction device from the recovery port of the casing through the suitable unevenness of the front edge of the guide base, which is in conformity with the unevenness of the whetstone surface. As a result, the crushed regenerated powder is scattered in the air and does not harm the human body.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional front view showing an example of a pulverizing apparatus for carrying out a method of pulverizing waste FRP of the present invention. Reference numeral 1 denotes a grindstone which is rotatably supported inside a casing portion 2 of the apparatus, and 3 denotes a waste material FRP4. The guide base 5 is made up of the front edge 3 and the guide base 3 held horizontally.
1 is pressed against the rotating grindstone 1, and the front edge of the guide base 3 is brought into a state in which it fits in contact with the grinding surface 1-1 of the surface of the grindstone 1 along the irregular shape composed of a group of abrasive grains 1-2 protruding and dotted.
3-1 is a base feed mechanism for fixing and holding the guide base 3 at the same position at the time of grinding, 6 is an automatic material feed mechanism for feeding the waste material FRP4 to the grindstone 1 along the guide base 3, While being automatically fed and pressed toward the grindstone 1 by the automatic material feed mechanism 6 through a feed path 7 described later, the waste material FRP4 is ground into a powder having a uniform particle size by plunge grinding with the grindstone 1. .

The grinding wheel 1 has a conventionally known structure, is fixed to a drive shaft of a motor 9 installed on a machine frame base 8 of the apparatus, and is entirely covered by a casing 2. In this state, the motor 9 rotates longitudinally.

A caging unit 2 for covering the grindstone 1 hermetically seals the whole grindstone 1 so that grinding powder of the waste material FRP4 crushed by plunge grinding, that is, regenerated powder M, does not scatter around the apparatus. The feed path 7 is horizontally provided and a recovery port 10 for recovering the regenerated powder M is opened at the lower side to connect to a suction device 11.

The feed path 7 is a material supply port for sequentially feeding the waste material FRP 4 toward the vertically rotating grindstone 1 in the casing portion 2 and has a plate shape having various cross-sectional shapes and lengths, for example, various widths and thicknesses. Or a waste material FRP4 having a bar shape having various cross-sectional shapes and thicknesses is formed by grinding the grinding wheel 1 in the casing portion 2.
The casing is provided with a horizontal section extending forward from the casing portion 2 with an appropriate opening cross-sectional shape that can be sequentially fed toward the housing, and a bottom surface from the opening to the casing portion 2 is opened, and a guide base is provided on the opening bottom surface. The guide base 3 is provided so as to be horizontally movable while the base 3 is held by the base feed mechanism 5. On both sides of the feed path 7, windows 12 for allowing a feed roller 6-1 to be described later of the automatic material feed mechanism 6 to face the feed path 7 are opened. A feed mechanism 6 is provided.

The guide base 3 is made of a regenerated powder M of the waste material FRP4 pulverized into a powder having a uniform particle size by plunge grinding.
Only the role of maintaining the relationship with the grinding surface 1-1 of the surface of the grinding wheel 1 so that only the grinding wheel 1 is passed to the collecting port 10 side of the casing portion 2 by the rotation of the grinding wheel 1 is used. 7. Close the bottom of the opening. Specifically, the waste material FRP has a base width (plate width) that blocks the opening width direction of the opening bottom surface of the feed path 7.
4 was formed in a plate shape having an appropriate thickness not to be destroyed during the pulverization process, and was held on a slide portion 5-1 to be described later of the base feed mechanism 5 by an appropriate fastening means such as a screw 13 stop. In this state, it is provided so as to be horizontally movable along the bottom of the opening of the feed path 7.

The guide base 3 has a front-rear two-part structure in which a front end side pressed against the grindstone 1 is separated, and the separated front end piece 3-10 is attached to the slide portion 5-1 by an appropriate screw 13 or the like. The front end piece 3-10 alone can be appropriately replaced by being held by the fastening means. In other words, the front edge 3-1 of the grinding wheel 1 that is in contact with the grinding surface 1-1 along the uneven shape of the grinding surface 1 is pressed by the abrasive grains 1-10 of the grinding wheel 1 when the recycled powder M of the crushed waste material FRP4 is pressed by the abrasive grains 1-10. As it is rubbed and worn by the load action when it is scraped out to the 10 side, the guide base 3 is pressed against the grindstone 1 with the consumption and the front edge 3-1 is ground.
It is necessary to repeat the action of conforming to the uneven shape of 1-1. Then, the length of the front end piece 3-10 gradually decreases each time the above-mentioned action is performed, and the length is longer than the range of the pressing force applied to the grindstone 1 by the base feeding mechanism 5 (the moving distance of the slide portion 5-1). Only the front end piece 3-10 that separates when it becomes shorter can be replaced as appropriate. Further, the base width of the guide base 3 may be narrower than the width of the grindstone 1 so that the grinding process of the waste material FRP4 by plunge grinding is surely performed.

Before starting the grinding process of the waste material FRP4, the base feed mechanism 5 rotates the grindstone 1 longitudinally until the front edge of the guide base 3 fits along the uneven shape of the grinding surface 1-1 of the grindstone 1 surface. At the time when the front edge fits along the uneven shape formed of the abrasive grains 1-10 which are ground by the grindstone 1 and protrude on the ground surface 1-1, while pressing the guide base 3 toward ( The state shown in FIG. 5) serves to fix and hold the guide base 3 at the same position. The slide part 5-1 is provided so as to be horizontally movable in the recess 14 provided at the bottom of the feed path 7 described above. A drive unit 5-2 composed of air or a hydraulic cylinder or the like for moving the slide unit 5-1 back and forth is provided. Presses the guide base 3 held in the part 5-1 against the grindstone 1. It is configured to.

The slide part 5-1 is provided with bolts 16 at two front and rear holes (four in total) provided on both side walls of the recess 14.
It is movably mounted inside the concave portion 14 while being held by fastening means such as a stopper, and is horizontally moved back and forth (sliding) by the driving portion 5-2 within the length range of the long hole 15. Become

The automatic material feed mechanism 6 serves to feed and press the waste material FRP 4 fed into the feed path 7 toward the grindstone 1 at a constant speed, and the windows 13 on both sides of the feed path 7.
From the same route 7 and the waste material FRP4
A pair of left and right feed rollers 6-1 for feeding toward the grindstone 1 while being sandwiched from the left and right at each location, and the same set of rollers 6-1 for synchronizing the drive rollers 6-1 to drive and rotate at a rotational speed. And a motor 6-4 connected via a power transmission means 6-3. The motor 6-4 drives a pair of right and left front and rear feed rollers 6-1 in a synchronized rotation to drive the feed path. The waste material FRP4 supplied to the inside 7 is fed at a constant speed toward the grindstone 1 and pressed.

The feed roller 6-1 is a material such as rubber which can feed the waste material FRP4 at a constant speed without slipping toward the grindstone 1 while maintaining an appropriate frictional resistance with respect to the waste material FRP4. From the roller shaft 6-10. This roller shaft 6-10 is a motor
A pair of left and right transmission shafts around which a chain or a timing belt 6-31 described later of the power transmission means 6-3 is wound around from 6-4.
6-5, a pair of left and right roller arms 6-2, each of which is provided so as to be swingable in the front-rear direction of the feed path 7 and in the cross-sectional direction of the opening of the feed path 7, respectively. Be prepared.

The power transmission means 6-3 is a pair of right and left motor motors 6-4, which can be switched between forward and reverse, and is provided at two front and rear positions (total of 4 motors).
The power is transmitted and distributed at a rotational speed synchronized with each feed roller 6-1. The motor 6-4 has a sprocket or pulley 6-30 mounted on one of a pair of left and right transmission shafts 6-5. And the timing belt 6-31 is wound around and the gears 6-6 provided on the transmission shafts 6-5 are connected to each other. Each sprocket or pulley provided with two shafts on each of the transmission shafts 6-5.
A chain or timing belt 6-34 is wound around a sprocket or pulley 6-33 provided on each of the roller shafts 6-10 from 6-32 to the front and rear, respectively. This is transmitted to one of the transmission shafts 6-5.
6-5 and the other transmission shaft 6--6 linked by gear 6-6
Conveyed to 5. Then, the power transmitted to both transmission shafts 6-5 is transmitted to each roller shaft 6-10 linked to each other by a chain or a timing belt 6-34, and a pair of right and left is transmitted at two positions in front and rear (a total of four positions). The roller 6-1 is formed so as to be driven and rotated at a synchronized rotation speed.

A pair of left and right transmission shafts 6-5 are mounted on a support frame 17 erected on the machine frame base 8 in a substantially gate-shaped side so as to straddle the feed path 7 and stand on both sides of the feed path 7 in an upright state. Controls the axis so that it can rotate, and has a roller shaft 6-10 rotatably supported at the other end. One end of each of the upper and lower roller arms 6-2 can swing to the upper and lower parts of the transmission shaft 6-5 respectively. It will be pivoted to.

In the drawing, reference numeral 18 denotes a pair of right and left feed rollers.
A roller arm 6 that rotatably supports a roller shaft 6-10 of each feed roller 6-1 so as to sandwich the waste material FRP4 in the feed path 7 from the right and left with an appropriate pressing force. 2 is a resilient member composed of a tension or compression spring provided on each roller arm 6-2 so as to resiliently urge the roller 2 (applied to the compression spring in the illustrated example). A pair of left and right feed rollers 6-1 are pressed against the waste material FRP4 in the feed path 7 by the force of force so that the waste material FRP4 is reliably fed toward the grindstone 1 and pressed.

In FIG. 19, the process of finishing the plunge grinding of the last waste material FRP4 sent to the feed path 7 in which the crushing process of a large number of waste materials FRP4 is completed is completed. The dummy FRP 19 is a dummy FRP which serves to send all the waste material FRP4 sent into the feed path 7 and finally sent to the grindstone 1 so as to be pressed and crushed into a powder by plunge cutting. To form the same cross-sectional shape as that of the opening of the feed path 7, and all the waste material FRP 4 finally sent to the feed path 7 is sent to the grindstone 1 and pressed (the state of FIGS. 8 and 9), All the FRRP4s are designed to be pulverized to a powder by plunge cutting. The dummy FRP 19 is pulled out of the feed path 7 by the feed roller 6-1 by reversing the motor 6-4 after a series of processing operations is completed.

The dummy FRP19 is replaced with a thin plate-like waste material FR.
In the case of using P4, as shown in the drawing, a large number of sheets are laminated and integrated to form a sectional shape substantially the same as the sectional shape of the opening of the feed path 7, or a rectangular rod corresponding to the sectional shape of the opening of the feed path 7 When there is the waste material FRP4, the forming method thereof is arbitrary, such as forming the waste material FRP4 into a substantially same cross-sectional shape as the opening cross-sectional shape of the feed path 7 by cutting or the like.

Next, a method of pulverizing the waste material FRP4 by the pulverizer configured as described above will be described.
After the screw 13 is fixed to the slide portion 5-1 of the base feed mechanism 5 with a screw 13 and provided on the bottom of the opening of the feed path 7, the drive portion 5-2 is operated and the slide portion 5-1 is driven by the drive portion 5-2. Whetstone 1
The front edge 3-1 of the front end piece 3-10, which enables the guide base 3 to be replaced by sliding in the direction, is pressed against the grindstone 1 which rotates longitudinally, and the front edge 3-1 is ground by the grindstone 1 and the surface of the grindstone 1 The work is continued until the contact is made along the uneven shape consisting of the group of abrasive grains 1-10 protruding from the grinding surface 1-1 of the front edge 3-
At the point when 1 is ground to the appropriate unevenness that conforms to the unevenness along the uneven shape, the operation of the drive unit 5-2 is stopped, and the guide base 3 is fixedly held at the corresponding position (the state of FIG. 5). Whether or not the front edge 3-1 of the guide base 3 has been ground to the appropriate unevenness which fits along the unevenness of the grinding surface 1-1 of the grinding wheel 1 is determined from the transparent part of the casing part 2 which is made of a half transparent material. An operator can visually confirm the information.

Then, the automatic material feed mechanism 6 is operated to feed the waste material FRP4 into the feed path 7, and is sandwiched between the feed rollers 6-1 facing the same path 7. As a result, the waste material FRP4 is pressed against the grindstone 1 while being automatically fed toward the grindstone 1 along the guide base 3 by the driving rotation of the feed roller 6-1 and is crushed into powder having a uniform particle size by plunge grinding. The pulverized regenerated powder M is collected from the recovery port 10 by the suction action of the suction device 11 through the suitable unevenness of the front edge 3-1 of the guide base 3 which is in contact with the unevenness of the grinding surface 1-1 of the surface of the grinding wheel 1. Is what is done.

Thereafter, a large number of waste materials FRP4 are sequentially fed into the feed path 7 while checking the state of the grinding process of the waste materials FRP4, and the grinding processes are continuously performed (the state of FIGS. 6 and 7). Then, the last waste material F, in which the crushing process of a large number of waste materials FRP4 is completed and the processing operation is completed.
RP4 is sent to the feed path 7, and the last waste material FRP
In the process in which the plunge grinding of No. 4 is completed, the above-mentioned dummy FRP19 made of the same material is placed in the feed path 7 as the last waste material FRP.
4 and fed into the feed path 7 (state of FIG. 8). Then, the waste material FRP4 sent last and all the waste material FRP4 remaining without being pulverized into a powder having a uniform particle size are pressed to the grinding wheel 1 to the end by the dummy FRP19 (FIG. 9).
), All of which are pulverized into a powder having a uniform particle size by plunge cutting, and the regenerated powder M is pulverized, and the leading edge of the guide base 3 is in contact with the uneven surface of the grinding surface 1-1 on the surface of the grinding wheel 1. It is collected from the collection port 10 by the suction device 11 through the irregularities of 3-1 (state in FIG. 10). After a series of processing operations is completed, the motor 6-4 is rotated in the reverse direction and pulled out from the feed path 7 by the feed roller 6-1 in order to reuse the dummy FRP 19 at the next pulverization processing (the state shown by the two-dot chain line in FIG. 10). ).

The rod 20 is attached to the dummy FRP 19 so that the dummy FRP 19 can be easily handled when the dummy FRP 19 is fed into the feed path 7 or when the dummy FRP 19 is removed from the feed path 7 and stored. It is good to

FIG. 11 is a longitudinal sectional front view showing another embodiment of the crushing apparatus for carrying out the crushing method of the waste FRP 4 of the present invention. In this embodiment, the front edge 30-1 is pressed against the grindstone 1. Guide base 30 and slide part of base feed mechanism 5
The configuration of 5-3 is changed, and the other components are basically the same as the details of the embodiment described above.
The description is omitted by using the same reference numerals for the same components. In addition, since the operation is basically the same, the description of the pulverizing method using the apparatus of the embodiment is omitted.

The guide base 30 is held on the front portion of the slide portion 5-3 by an appropriate fastening means such as a screw 13 as described in the above-described embodiment, and is pressed against the grindstone 1 by a front end piece 30-. 1
0, the rear end piece 30-11 held at the rear of the slide portion 5-3 at the same thickness as the front end piece 30-10, and the front and rear end pieces 30-1
The middle piece 30-12 is divided into three parts, and the middle piece 30-12 is a pair of left and right feed rollers 6-1.
A support column that stands upright from the machine frame base 8 with it positioned between
It is held in a cross-linked state between 21 to prepare for immobility. In other words, the front and rear end pieces 3-20 and 3-21 can move in the front and rear direction of the feed path 7 by the front and rear movement of the slide portion 5-3 which is disposed so as to be able to move horizontally, while the intermediate piece 30 -12 is supported by the machine frame base 8 of the apparatus via the support column 21, so that it is provided so as not to move together with the front and rear end pieces 30-10, 30-11.

As described in detail in the above-described embodiment, the slide portion 5-3 is provided at two front and rear portions (total of 4 portions) provided on both side walls of the concave portion 14.
The same is true of the mounting configuration in which the hole is movably mounted in the recess 14 while being held in the long hole 15 by a fastening means such as a bolt 16 or the like, but the overall shape is made larger. And inside it, a pair of left and right feed rollers
1 is provided with a notch 22 that is opened in such a size that it does not contact with the roller arm 6-2 inside the notch 22 that supports the roller shaft 6-10 of each feed roller 6-1. Let me do it.

[0032]

The method and apparatus for crushing reinforced plastics of the present invention are constructed as described above, and have the following effects. . According to the pulverization method of claim 1, when the waste material FRP is fed to a vertically rotating grindstone along the guide base and pressed, the waste material FRP is pulverized by the grindstone and pulverized into powder having a uniform particle size. , Crushed waste material F
Recycled powder of RP is collected through the matching unevenness of the front edge of the guide base, which fits along the uneven shape consisting of the abrasive grains protruding and scattered on the grinding surface of the grindstone surface, so that it has a uniform particle size. Only the regenerated powder plunge-ground can be recovered. In addition, since the guide base is made of the same material as the waste material FRP to be pulverized, even if its front edge is ground by a grindstone, it does not become a foreign material of a different material and does not mix with the recovered recycled powder.

[0033] According to the pulverizing method according to the second aspect, a large number of waste materials FRP are fed through the feed path toward the grindstone that rotates vertically, and in the process of plunge grinding the finally sent waste material FRP, the waste material FRP is connected to the waste material FRP. Since the dummy FRP made of the same material is fed into the feed path, all the waste material FRP sent last can be sent to the grindstone, pressed and crushed into a powder by plunge cutting. The front end of the dummy FRP is ground into a cylindrical shape along the surface of the grindstone that rotates vertically, but the waste material FR
Since it is made of the same material as P, it does not become a foreign material having a different material and is not mixed with the recovered regenerated powder.

[0034] According to the crushing device of the third aspect, the guide base made of the waste material FRP is pressed by the base feed mechanism against the grindstone that rotates longitudinally until the front end edge thereof fits along the uneven shape of the grindstone surface. The front edge of the guide base fits along the uneven shape of the grinding wheel surface because it is fixed and held by the base feed mechanism at the same point when it is ground and fits along the uneven shape of the grinding wheel surface In a state where it is kept in contact with it and is not plunge ground into a powder of uniform particle size by a grindstone,
For example, it does not pass between the guide base and the grindstone in a state of a crushed residual piece such as a cut piece or a crushed piece. That is, after all the waste materials FRP are ground into powder having a uniform particle size by plunge grinding, the waste materials can be recovered through the matching projections and depressions of the front end edge of the guide base, which fits along the contours of the grinding wheel surface. The waste material FRP is pressed against the whetstone while being automatically fed toward the whetstone by the automatic material feed mechanism and is crushed by plunge grinding, so that the processing operation is greatly improved.

[0035] According to the crushing device of the fourth aspect, the waste material FRP is pressed while being automatically fed to the grindstone by the automatic material feeding mechanism as described above through the feed path horizontally connected from the casing portion covering the grindstone, and the plunge cutting is performed. In the process of finishing the plunge grinding of the waste material FRP sent in at the same time,
Waste material F formed in substantially the same cross-sectional shape as the opening cross-sectional area of the feed path
Since the dummy FRP made of RP was fed into the feed path in connection with the last waste material FRP, the last sent waste material FRP was pressed against the grindstone by the dummy FRP, and the last waste material FRP was uniformly sized by plunge cutting. Can be crushed into a powder.

[0036] According to the crushing device of the fifth aspect, as described above, the waste FRP which is pressed while being automatically fed toward the grindstone through the feed path by the automatic material feed mechanism and crushed into powder having a uniform particle size by plunge cutting is used. Since the regenerated powder is sucked and collected from the collection port of the casing by the suction device, the pulverized regenerated powder is not scattered in the air and does not harm the human body. Therefore, the working environment can be improved.

Therefore, according to the present invention, only the regenerated powder of the waste material FRP pulverized into a powder having a uniform particle size through the suitable unevenness of the front edge of the guide base adapted to be in contact with the unevenness of the grinding surface of the grinding wheel surface. Because it is made to recover, compared with the conventional pulverizing method and its pulverizing equipment, waste material FRP
Can be reliably and efficiently pulverized into a powder having a uniform particle size, and an epoch-making pulverizing method and a pulverizing apparatus which are friendly to the working environment can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an example of a crushing apparatus for performing a reinforced plastic (waste FRP) crushing method of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional plan view taken along the line III-III of FIG.

FIG. 4 is a side view taken along line IV-VI of FIG. 1;

FIG. 5 is a view showing a state in which a guide base is pressed against a rotating grindstone by a base feeding mechanism and a front edge thereof is adapted to conform to the uneven shape of the grindstone surface. Longitudinal front view of the main part showing the process

FIG. 6 is a crushing process performed by plunge grinding while automatically feeding and pressing a reinforced plastic to a rotating grindstone by an automatic material feeding mechanism along a guide base having a front edge adapted to the uneven shape of the grindstone surface. Front view of the main part showing the grinding process

FIG. 7 is a longitudinal sectional front view of a main part showing a grinding process in which a large number of reinforced plastics are continuously fed and pressed by a plunge grinding while being automatically pressed against a grindstone which is sequentially rotated by a material automatic feeding mechanism.

FIG. 8 shows a process in which the plunge grinding of the reinforced plastic finally fed through the feed path is completed, while the dummy reinforced plastic having substantially the same cross-sectional shape as the opening of the feed path is automatically fed by the automatic material feed mechanism. Longitudinal view of the main part showing the crushing process in which the crushing process by plunge grinding of reinforced plastic is performed

FIG. 9 shows a state in which the final pulverization processing by plunge grinding is performed while pressing the reinforced plastic remaining without being pulverized into a powder having a uniform particle size with a dummy reinforced plastic against a grindstone, and FIG. (B) is a cross-sectional plan view of the main part showing

FIG. 10 is a longitudinal sectional view of a main part showing the grinding step after a series of processing operations is completed.

FIG. 11 is a longitudinal sectional front view showing another embodiment of the crushing apparatus for performing the reinforced plastic (waste FRP) crushing method of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Whetstone 1-1 ... Grinding surface 2 ... Casing part 3, 30 ... Guide base 3-1 and 30-1 ... Front edge of guide base 4 ... Waste material FRP 5 ... Base feed mechanism 6 ... Automatic material feed mechanism 7 ... Feed Road 10… Recovery port 11… Suction device 18… Dummy FR
P

Claims (5)

(57) [Claims] 1. A guide base made of reinforced plastic is pressed against a rotating grindstone to grind the front end to a state in which the front end fits along the uneven shape of the grindstone surface. A method of grinding reinforced plastics, characterized in that plunge grinding is performed while feeding and pressing against a rotating grindstone. 2. A grinding method according to claim 1, wherein a feed path is provided for sequentially feeding a large number of reinforced plastics toward the grindstone, and the reinforced plastic finally fed through the feed path is subjected to plunge grinding in the grinding process. ,
A reinforced plastic crushing method, characterized in that a dummy reinforced plastic having substantially the same cross-sectional shape as the opening cross-sectional shape of the feed path is fed so that plunge grinding of the last reinforced plastic is completed. 3. A whetstone and a guide base made of reinforced plastic are pressed horizontally against the rotating whetstone while holding the guide base made of reinforced plastic horizontally, and the guide base is brought into contact with the whetstone along the uneven shape of the whetstone surface. It is characterized by comprising a base feed mechanism that fixes and holds the guide base at the same position when the front edge is ground, and a material automatic feed mechanism that feeds reinforced plastic to the grindstone in a state along the guide base. Crushing equipment for reinforced plastics. 4. A grinding device according to claim 3, wherein a feed path for sequentially feeding reinforced plastic having an appropriate cross-sectional shape and having at least a bottom opening from the casing portion covering the grindstone toward the grindstone is provided horizontally. In addition, a crushing device for reinforced plastics, wherein a guide base is provided so as to be horizontally movable along the bottom surface of the feed path. 5. The crushing device for reinforced plastic according to claim 4, wherein a recovery port is provided in a casing portion covering the grindstone, and a suction device is connected to the recovery port.