JPH02136228A - Method and apparatus for continuously producing frp molding - Google Patents

Abstract

PURPOSE:To continuously and efficiently mold laminated FRP composed of a plurality of layers in a narrow space by feed conveyors mounted in a multistage fashion and the transfer conveyor devices mounted to both end parts of the conveyors. CONSTITUTION:A resin mold is successively transferred to two or more stages of upper and lower feed conveyors 3, 4, 5, 6 to be fed and, during this period, the coating of a resin by coating devices 10 - 13 and the heat-curing thereof by a heating device 8 are applied to mold laminated FRP. Continuously, the laminated FRP molding is taken out of the resin mold by a demolding conveyor apparatus 51 and the resin mold is washed to be again fed to the feed conveyors to be recirculated and used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a continuous manufacturing method and apparatus for FRP molded products.

[Prior Art] In recent years, FRP (fiber reinforced plastic) made of thermosetting resin has been used as general building materials, various structural members,
It is also being used in a wide range of applications, such as as a material for the body of refrigerated vehicles by making it into panels, and its scope of use is expanding.

Conventionally, the manufacturing method for FRP flat plates has relied heavily on manual labor, and a mat made of inorganic or organic fibers is produced by coating resin on a stainless steel surface plate and cutting it to the required length. (Typically, a glass chopped strand mat is impregnated and degassed, then the mat is stretched, resin is applied, and the impregnation and defoaming process is repeated.Finally, the entire surface is covered with a film to prevent contact with oxygen in the air. A method of naturally curing after defoaming to prevent this (hand lay-up method)
was the mainstream.

However, since this method is done manually, the quality depends on the skill of the worker, making it difficult to obtain stable products, making mass production impossible, and resulting in high costs.

For this reason, an FRP flat plate continuous fabrication device as shown in FIG. 8 has been proposed. That is, after spraying the FRP resin d from a nozzle C onto the lower film b unwound from a roll a wrapped with polyethylene film, etc., impregnation and defoaming are performed using a pressure roll C, and then the upper surface is separated. roll r
After covering it with the upper film q unwound from the film, it is introduced into a heating device and cured by heating, and then the films b and 9 are peeled off and wound up using film winding rolls 1 and j. The formed FRP flat plate is cut into required dimensions using a flat plate cutter.

[Problems to be Solved by the Invention] However, while the conventional continuous manufacturing apparatus described above is advantageous in that mass production is possible when manufacturing FRP flat plates of the same size, it is limited to the manufacture of flat plates, and unevenness may occur. It is difficult to continuously manufacture certain types of FRP molded products, and in cases where a box shape is formed by combining panels of different sizes, such as in a refrigerator car, the flat plate size varies depending on the size of the car etc. Therefore, in such cases, the material is cut according to size, resulting in a problem of extremely low yield. Furthermore, the cutting waste generated during the production of FRP flat plates using the above-mentioned thermosetting resin cannot be republished, and the only way to dispose of it is to shred it using a crusher or the like.

Therefore, efficient manufacturing with as little waste as possible is desired.

In addition, when trying to manufacture a multilayer FRP flat plate using the conventional continuous fabrication equipment, the line becomes extremely long, and heating devices corresponding to the number of layers are required, making the equipment extremely large. There is a problem that a large amount of film such as polyethylene b. What were they doing to solve the problem of increasing costs because 9 was disposable?

The present invention has been made by focusing on the problems of the conventional method described above, and is an FRP molding method that enables continuous and efficient production of FRP molded products of arbitrary shapes and sizes and consisting of multiple layers using small-sized equipment. The purpose of this invention is to provide a method and apparatus for continuous production of products.

[Means for Solving the Problems] The present invention involves coating the upper surface of the resin mold with resin and curing it by heating without transporting the resin mold, and then transferring the resin mold in the vertical direction and performing the same operation as above. By repeating this process, after molding the required number of layers of laminated FRP, the laminated FRP and the resin mold are demolded, the laminated FRP molded product is taken out, the resin mold is cleaned, and the cleaned resin mold is A continuous manufacturing method for an FRP molded product, characterized in that it is subjected to molding of laminated FRP,
and equipment.

[Function] While the resin mold is sequentially transferred and conveyed to multiple upper and lower transport conveyors, a laminated FRP is formed by coating and heating hardening the resin, and then a mold removal conveyor device is used to mold the laminated FRP molded product or resin. The resin mold is removed from the mold, cleaned, and sent to the conveyor again for circulation use.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1.2 shows an example of the present invention, in which an FRP molding device 1 and a resin mold supply device 2 constitute a continuous mounting device for FRP molded products.

The FRP molding apparatus 1 has a plurality of conveyors 3.4, 5.8 in the vertical direction, and the conveyors 3, 4, 5.6 in each stage are arranged as shown by arrows in FIG. The resin mold 7 (see FIG. 3) is driven to be conveyed alternately in opposite directions.

A heating device 8 that surrounds the conveyors 3, 4, 5.8 is provided in the middle of the conveyors 3, 4, 5.8. A heating chamber 8a is partitioned so that 8 can pass through.

8b, 8c, 8d are formed, and the heating chambers 8a, 8b
, 8c.

The temperature of the heating chambers 8d can be set separately, and the temperature can be adjusted by dividing each heating chamber 8a, 8b, 8c, and 8d into a preheating zone A, a heating zone opening, and a heat removal zone C, as shown in FIG. A heating unit 9 is provided.

A first coating device 10 for spraying resin A, which will become the surface layer of the FRP molded product, onto the upper surface of the resin mold 7 is provided at an upper position on the entry side of the heating device 8 in the first stage conveyor 3. , a heating device 8 in the second stage conveyor 4
A second coating device 11 for spraying resin B is provided at the upper part of the entrance side of the conveyor 5, and a third coating device 11 for spraying resin C is provided at the upper part of the entrance side of the heating device 8 in the third-stage conveyor 5.
A coating device 12 is provided. Furthermore, if necessary, a similar coating device 13 for spraying resin may be provided on the fourth stage conveyor θ as well.

Further, the heating device 8 includes heating chambers 8a, 8b, 8c, 8.
If the polymerization of the resin sprayed onto the resin mold 7 conveyed through the conveyor 3.4 is inhibited by contacting with oxygen in the air, the upper surface of the resin is covered and conveyed onto the conveyor 3.4.
, 5.6, an endless releasable coated belt 14 having heat-resistant strength is provided. Release coated belt 1
4 is a polyester canvas 15 as shown in FIG.
One side (back side) of the two-layered product is coated with polyurethane resin 16, and the other side (front side) is coated with silicone 17.
A silicon coated belt coated with Teflon 19 or a glass cloth 18 coated with Teflon 19 as shown in FIG.
A heating device 8 in the releasable coated belt 14 is used.
A brush roll 20 and an air wiper 21 are provided at the unloading side position of the releasable coating belt 14, which rotates in a direction opposite to the direction in which the belt travels to wash the surface of the releasable coated belt 14 that has been peeled off from the FRP resin. A belt cleaning device 22 is provided so that the releasable coated belt 14 can be used continuously and repeatedly.

Further, at one end position of the transport conveyors 3, 4, 5.6, there is an upper fixed conveyor 23 fixed at the same height as the first stage transport conveyor 3, and an upper fixed conveyor 23 fixed at the same height as the fourth stage transport conveyor 6. The lower fixed conveyor 24 is fixed to the lower fixed conveyor 23. An elevating conveyor 27 that can move
At the other end, there is provided a transfer conveyor device 28 having an upper elevating conveyor 23' and a lower elevating conveyor 24' which can be raised and lowered by an elevating device 25.

The resin mold supply device 2 is adjacent to the transfer conveyor device 28 by extension, and has an upper fixed conveyor 30 and a lower fixed conveyor 3 at a height that matches the upper and lower fixed conveyors 23 and 24.
1, and mold storage shelves 3 provided in multiple stages vertically between them.
It has a mold storage conveyor device 33 for carrying out two operations.

Further, on the extension of the mold storage conveyor device 33, a No. 6.7
As shown in the figure, a lower conveyor 35 is supported by a cylinder device 34 so as to be able to sink down a required amount from the same height as the lower fixed conveyor 31, and An elevating conveyor 38 that can be raised and lowered via a hanging cable 37 by an elevating device 36 provided at the upper part is connected between the matched position and the mold storage shelf 32 of the mold storage conveyor device 33 and the upper fixed conveyor 30 of the uppermost stage. , a lifting conveyor device 40 having a height slightly lower than the lower fixed conveyor 31 and a shift conveyor 39 provided perpendicularly to the lower conveyor 35 portion.

Further, on the extension of the lifting conveyor device 40, there is a lifting conveyor 44 that moves up and down along a vertical axis 43 that is rotationally driven by a drive motor 42 provided on a pedestal 41, and a lifting conveyor 44 that extends along the pedestal 41 and is perpendicular to the lifting conveyor 44. A suction device 4 having suction pads 47, 48a, and 48b moves via a rail 46 between the upper side of the conveyor 44 and an FRP molded product conveying device 45 (FIG. 1) provided on one side.
9, and a resin mold shift conveyor 50 provided at the lower part in a direction orthogonal to the lifting conveyor 44. Incidentally, the elevating conveyor 44 is configured to be able to descend to a position slightly lower than the lower resin type shift conveyor 50.

On the opposite side of the demolding conveyor device 51 from the FRP molded article conveying device 45, there is a resin mold shift receiving conveyor 52 provided at the same height as an extension of the resin mold shift conveyor 50; A feed conveyor 54 parallel to the elevating conveyor 44 is movable up and down via a cylinder device 53 relative to the resin type shift receiving conveyor 52, and a spray nozzle 55 and a buff roll 5 are provided on the feed conveyor 54.
A cleaning conveyor device 58 having a cleaning device 57 consisting of 6 etc. is provided.

Further, on the same side as the cleaning conveyor device 58 of the lifting conveyor device 40, there is a resin mold feeding conveyor 59 extending at the same height as an extension of the shift conveyor 39.
The cylinder device 6 is connected to the resin mold feeding conveyor 59.
A return conveyor device 62 is provided which can be raised and lowered through the cleaning conveyor device 58 and has a receiving conveyor 61 which is connected in parallel with the cleaning conveyor device 58.

Further, in the above, the cleaning conveyor device 58 may be provided with a cleaning device using liquid, and in that case, the return conveyor device 62 is provided with a drying device or the like that performs drying by spraying air or the like.

Next, the action will be explained.

The resin mold 7, which has been conveyed in the direction of the arrow by the upper fixed conveyor 23 of the transfer conveyor device 28, onto the first-stage conveyor 3 is coated with resin A by the coating device IO, and then the resin A is applied by the coating device IO. It is heated and cured while passing through the heating chamber 8a, and then sent to the upper elevating conveyor 23° of the transfer conveyor device 29, and then the upper elevating conveyor 23° is lowered to match the second stage transport conveyor 4. Transfer onto the transport conveyor 4.

Subsequently, resin B is applied via the coating device 11 onto the resin mold 7 in which the resin A is cured and is moved on the conveyor 4.
After further heating and curing in the heating chamber 8b of the heating device 8, the resin C is transferred onto the third stage transport conveyor 5 by the lifting conveyor 27 of the transfer conveyor 28, and then the resin C is applied by the coating device I2 in the same manner as described above. The coating is applied and cured by heating when passing through the heating chamber 8C, and then transferred to the fourth stage conveyor 6 by the lower elevating conveyor 24° of the transfer conveyor device 29 and conveyed.

In the above, a case is shown in which a three-layer FRP resin layer is formed on the resin mold 7, but it is also possible to form four layers by applying resin with the coating device 13, and each resin A, B, C, and D may be different substances or may be the same substance; in the case of Fig. 2, resin B,
Since C is made of a substance that inhibits polymerization of the resin when it comes into contact with oxygen in the air, its upper surface is covered with a releasable covering belt 14. Further, the resin on the resin mold 7 that is heated and hardened by the heating device 8 and comes out from each chamber is sufficiently cured while being transferred to the lower transport conveyor by the transfer conveyor devices 28 and 29. I have to.

The resin mold 7 integrally having the laminated FRP laminated and heat-cured on the upper surface by the FRP molding apparatus 1 is transferred from the fourth stage transport conveyor 6 to the lower fixed conveyor 24 of the transfer conveyor device 28 and the mold. It is sent via the lower fixed conveyor 31 of the storage conveyor device 33 onto the lifting conveyor 44 of the demolding conveyor device 51 located at the bottom by the lifting conveyor 38 of the lifting conveyor device 40 located at the bottom.

In the demolding conveyor device 51, after the elevating conveyor 44 is raised to the imaginary line position, the suction roses H7, 48a of the suction device 49 descend from the upper part.

48b is attracted to the laminated FRP on the upper surface of the resin mold 7, and then the suction pad 47 is first lifted to peel off the end of the laminated FRP, and then the entire suction pads 47° 48a and 48b are lifted. The laminated FRP is peeled off from the resin mold 7! (demolded). The peeled laminated FRP molded product is taken out to the FRP molded product conveying device 45 side by the movement of the suction device 49.

On the other hand, the resin mold 7 from which the laminated FRP has been peeled is transferred to the resin mold shift conveyor 50 by lowering the lifting conveyor 44 by the operation of the drive motor 42, and is further transferred to the cleaning conveyor by driving the resin mold shift conveyor 50. The mold is sent onto the resin mold shift receiving conveyor 52 of the device 58 .

At this time, the feed conveyor 54 is replaced by the resin type shift receiving conveyor 5.
It is lower than 2.

Subsequently, the feed conveyor 5 is moved by the extension of the cylinder device 53.
4 is raised to support the resin mold 7, and the return conveyor device 6
At the same time, the upper surface of the resin mold 7 is cleaned by the cleaning device 57. At this time, the feed conveyor 54 is located above the resin mold feed conveyor 59.

Subsequently, by reducing the size of the cylinder device 60, the resin mold 7 that has been cleaned and sent to the return conveyor device 62 is supported by the resin mold feed conveyor 59, and the resin mold feed conveyor 59 is driven to transport the resin mold 7 to the lifting conveyor device 40. is sent to the shift conveyor 39. At this time, the elevating conveyor 38 is lowered below the shift conveyor 39.

Subsequently, the elevating conveyor 38 that has received the resin mold 7 is raised to the position shown by the two-dot chain line by the elevating device 36, and the resin mold 7 is delivered to the upper fixed conveyor 30 of the mold storage conveyor device 33. Thereby, the resin mold 7 is again conveyed to the upper fixed conveyor 23 of the transfer conveyor device 28 and used for circulation.

When changing the size of the resin mold 7 according to a request to change the size of the laminated FRP, in the state shown in Fig. 6,
The height of the elevating conveyor 38 is changed by the elevating drive device 36, and the resin molds 7 on any mold storage shelf 32 are moved to the elevating conveyor 38.
After taking it out, the lifting conveyor 38 is aligned with the upper fixed conveyor 30 of the mold storage conveyor device 33 and the mold is sent to the upper fixed conveyor 30.

When the used resin molds 7 are returned to the mold storage shelf 32 for storage, the lifting conveyor 38 of the lifting conveyor device 40 is lowered below the shift conveyor 39, and the returned conveyor device after cleaning is carried out. After taking the resin mold 7 from 62 onto the shift conveyor 39, the elevating conveyor 38 is moved to the required height and placed on the target mold storage shelf 32.
Return to

According to the above, the resin mold is sequentially transferred to a conveyor provided in multiple stages above and below, and the resin is coated and cured by heating to form a laminated FRP, and the mold is continuously removed and the resin mold is returned. Since the resin molds are used repeatedly, the equipment can be consolidated and the space occupied can be kept small while continuous work can be carried out. Furthermore, when changing the resin mold to be used, the lifting conveyor device 40 can automatically take out the resin mold from the mold storage shelf 32 provided on the conveyor line and store it there. It can reduce the space occupied and save labor.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be implemented even when the laminated FRP has various uneven shapes, and the number of stages of the conveyor and the number of layers of the laminated FRP may vary. The resin molds may be transferred from the lower transport conveyor toward the upper stage, various methods may be adopted for the operation of each conveyor such as raising and lowering, and other features of the present invention include: Of course, various changes may be made without departing from the spirit of the invention.

[Effects of the Invention] As described above, according to the continuous manufacturing method and apparatus for FRP molded products of the present invention, the following various excellent effects can be achieved.

(1) By using the multi-stage transport conveyor and the transfer conveyor devices provided at both ends thereof, it is possible to continuously and efficiently form a plurality of layers of laminated FRP within a narrow space.

(n) By one of the upper and lower conveyor lines,
The resin mold that molded the laminated FRP is carried in and demolded, and the resin mold after demolding is taken out to the side, cleaned, and then returned to the other side of the conveyor line for circulation use. The whole can be effectively consolidated to reduce the occupied space.

(b) Laminated FRP molded products having various sizes and shapes can be efficiently produced.

[Co., Ltd.] Since all the movement of the resin mold is carried out by a conveyor device, it is possible to prevent the resin mold from being damaged.

[Brief explanation of the drawing]

Fig. 1 is an overall plan view showing an embodiment of the present invention, Fig. 2 is a view taken in the direction of the ■ arrow in Fig. 1, and Fig. 3 is a detailed enlarged view of a part of the heating device in Fig. 2. Cross-sectional view, Figures 4 and 5
The figure is a sectional view showing an example of the material of the releasable coated belt, Figure 6 is an enlarged view of Figure 1 viewed from the ■ direction, and Figure 7 is an enlarged view of Figure 1 viewed from the ■ direction. , FIG. 8 is a side view showing an example of a conventional continuous manufacturing apparatus for FRP flat plates. I is FRP molding equipment, 2 is resin mold supply equipment, 3.4, 5
．． 6 is a conveyor, 7 is a resin mold, 8 is a heating device, 10
, 11, 12.13 is a coating device, 14 is a releasable coating belt, 28.29 is a transfer conveyor device, 33 is a mold storage conveyor device, 40 is a lifting conveyor device, 51 is a demolding conveyor device, and 58 is a cleaning device. The conveyor device 62 indicates a return conveyor device.

Claims (1)

[Claims] 1) By applying a resin to the upper surface of the resin mold and heating and curing it while transporting the resin mold, then transferring the resin mold in the vertical direction and repeating the same operation as above, Lamination F of required number of layers
After molding the RP, the laminated FRP and the resin mold are demolded to take out the laminated FRP molded product, the resin mold is cleaned, and the cleaned resin mold is used for molding the laminated FRP. Continuous manufacturing method for FRP molded products. 2) A plurality of upper and lower transport conveyors for transporting resin molds, a transfer conveyor device for sequentially transferring in the vertical direction at the end of the transport conveyor, and each transport conveyor at an intermediate position of the transport conveyor. A heating device that surrounds the conveyor, a resin coating device that is placed on the resin mold loading side to the heating device in each conveyor, and a demolding conveyor that removes the laminated FRP molded on the resin mold from the resin mold. 1. A continuous manufacturing apparatus for FRP molded products, comprising: a cleaning conveyor apparatus for cleaning the resin mold after being demolded; and a lifting conveyor apparatus for returning the cleaned resin mold to the transport conveyor.