JP6895038B2 - Manufacturing method and manufacturing equipment for composite sheet materials - Google Patents

Description

The present invention relates to a manufacturing method and a manufacturing apparatus for obtaining a composite sheet material in the form of a sheet by impregnating or welding a fiber material such as carbon fiber or glass fiber with a resin material such as an epoxy resin, a polyamide resin or a polyether ether ketone resin. ..

Conventionally, a fiber-reinforced composite material using a thermosetting resin or a thermoplastic resin as a matrix resin is lighter than a metal material, has excellent specific strength and specific rigidity, and has higher elasticity and higher strength than a resin material alone. is there. Therefore, it is a material that is attracting attention in a wide range of fields such as aerospace field, automobile field, civil engineering / building field, and exercise equipment field.

A molded product of a fiber-reinforced composite material is formed into a laminate in which a sheet-shaped composite sheet material obtained by welding a resin material as a matrix to a fiber material made of reinforcing fibers such as carbon fiber and glass fiber is laminated in various directions. Then, in many cases, the laminate is manufactured as a laminate molded body having a required shape by impregnating the fiber material with a resin material serving as a matrix by a method such as heat and pressure molding.

The composite sheet material is roughly classified according to the reinforcing direction of the fiber material, the state of the fiber material, and the impregnated state indicating the degree of penetration of the resin material serving as a matrix into the voids in the fiber material. When viewed from the reinforcing direction of the fiber material, it is roughly classified into a unidirectional reinforcing sheet material, a woven fabric reinforcing sheet material, and a multi-axis reinforcing sheet material. Further, the state of the fiber material is roughly classified into a continuous fiber form and a short fiber form. Then, from the impregnated state of the resin material into the fiber material, the resin material is not impregnated so as to hardly penetrate into the voids in the fiber material, the resin material is semi-impregnated into the voids in the fiber material, and the resin material is partially impregnated. It is roughly classified into impregnation that penetrates so as to fill the voids in the fiber material.

When a composite sheet material is produced by adhering, semi-impregnating or impregnating a resin material to be a matrix to a fiber material, heating and pressurizing is performed in most cases. At this time, in order to prevent the resin material from adhering to the portion to be heated and pressed and the continuous processing cannot be performed, a release sheet is placed between the material to be molded of the fiber material and the resin material and the member to be heated and pressed. Provide materials. However, auxiliary materials such as the release sheet material are expensive, and due to the finite length of the release sheet material, the obtained length of the composite sheet material is affected by the length of the release sheet material. There is a problem that it is difficult to obtain a long composite sheet material.

In order to deal with such a problem, in Patent Document 1, instead of the release sheet material, two transport belts are paired to run between the heating and pressurizing rolls and then the cooling rolls. A method of continuously producing a composite sheet material while sandwiching a fiber material and a resin material to be molded material between two transport belts and impregnating or semi-impregnating the resin material in the fiber material is described. ing. In the above device, since the transport belt is used instead of the release sheet material, the length of the composite sheet material to be produced is not limited, and it is possible to produce a long composite sheet material.

Japanese Unexamined Patent Publication No. 2017-31342

In Patent Document 1, a transport belt is used instead of the release sheet material, but as an apparatus configuration, a heating / pressurizing roll and a cooling roll must be inserted and installed inside the transport belt. In order to insert and install the rolls inside the transport belt, a process such as removing all the rolls once is required, which is a time-consuming work.

Further, since the composite sheet material must be separated from the transport belt and proceed to the next process, it is necessary to perform a mold release process on the portion where the transport belt and the composite sheet material come into contact with each other. Fluorine-based demolding treatment belts are available on the market up to a heating temperature of about 300 degrees, but when the heating temperature is 300 degrees or higher, especially around 400 degrees, it is suitable for that temperature. There is a problem that it is difficult to obtain a transport belt that has been subjected to a mold release process because it is not distributed.

Therefore, the present invention obtains a long sheet-like composite sheet material in which a resin material is attached to a fiber material, semi-impregnated or impregnated, without using an auxiliary material such as a release sheet material or a transport belt. It is an object of the present invention to provide a manufacturing method and a manufacturing apparatus.

In the method for producing a composite sheet material according to the present invention, a composite sheet material is formed by heating and pressurizing a material to be molded composed of a fiber material and a resin material to attach, semi-impregnate or impregnate the resin material to the fiber material. In the method for producing a sheet material, the periphery of a plurality of heating regions arranged at intervals in the molding region is set to a cooling state in which the temperature is lower than the melting temperature of the resin material, and the covering in the heating region in the cooling state. The molding material is heated and pressed to melt the resin material, and the resin material is attached to, semi-impregnated or impregnated with the fiber material. Further, the molding region is relatively moved with respect to the material to be molded, and the material to be molded is molded by sequentially heating and pressurizing the heating region in accordance with the relative movement of the material to be molded. Further, the heat treatment unit that sets the periphery of the heating region to the cooling state is cooled by approaching, contacting, or after contacting the material to be molded with pressure, and the heat treatment unit that heats and pressurizes the heating region is to be molded. The resin material is attached to, semi-impregnated or impregnated with the fiber material by contacting or after contacting the material, and after separating the heat-treated part from the material to be molded, the cooling-treated part is separated from the material to be molded. Separate. Further, a plurality of the molding regions are arranged. Further, the pressing force is adjusted in each of the heating regions of the plurality of molded regions to be heated and pressurized.

The apparatus for producing a composite sheet material according to the present invention includes a heat treatment unit that heats and pressurizes a material to be molded, which is composed of a fiber material and a resin material, to melt the resin material, and attaches the melted resin material to the fiber material. In a composite sheet material manufacturing apparatus for semi-impregnating or impregnating to form a composite sheet material, the heat treatment unit includes a plurality of heating bodies arranged at predetermined intervals, and is provided around the heating body. A cooling treatment unit that sets the temperature to a cooling state lower than the melting temperature of the resin material, and an operation process of moving the heat treatment unit and the cooling treatment unit in a direction approaching or separating from the surface of the material to be molded. It has a department. Further, the operation processing unit sets the surface to a cooled state by approaching, contacting, or after contacting the surface of the material to be molded with the cooling processing unit to set the surface in a cooled state, and the surface of the material to be molded is set to a cooled state. Is set to be brought into contact with the heat treatment unit to heat and pressurize. Further, it is provided with a moving portion that moves at least the heat treatment portion and the cooling treatment portion relative to the material to be molded. Further, in the heating body, the heating surface in contact with the material to be molded is formed in a round shape, and the area of the heating surface is 1000 mm ² or less. Further, in the heating body, the heating surface in contact with the material to be molded is formed in a square shape, and the area of the heating surface is 1000 mm ² or less. Further, in the heating body, the heating surface in contact with the material to be molded is formed in an elongated shape, the long side length of the heating surface is more than twice the short side length, and the short side length is 30 mm. It is as follows.

Since the present invention has the above-mentioned structure, it can be formed as a long sheet in which a resin material is attached, semi-impregnated or impregnated with a fiber material without using an auxiliary material such as a release sheet material or a transport belt. It becomes possible to obtain the resulting composite sheet material.

It is a schematic side view about the manufacturing apparatus of the composite sheet material which concerns on this invention. It is explanatory drawing concerning the production of the composite sheet material by the manufacturing apparatus of the composite sheet material which concerns on this invention. It is explanatory drawing about the heating body and the cooling processing part which concerns on this invention. It is explanatory drawing about a plurality of heating bodies and a cooling treatment part which concerns on this invention. It is explanatory drawing about the production of the composite sheet material by the manufacturing apparatus of another composite sheet material which concerns on this invention. It is explanatory drawing about the production of the composite sheet material by the manufacturing apparatus of another composite sheet material which concerns on this invention. It is explanatory drawing about the structure of the plurality of heating bodies and cooling treatment part which concerns on embodiment of this invention.

Hereinafter, embodiments according to the present invention will be described in detail. Since the embodiments described below are preferable specific examples for carrying out the present invention, various technical restrictions are made, but the present invention clearly states that the invention is particularly limited in the following description. Unless otherwise specified, it is not limited to these forms.

FIG. 1 is a schematic side view of an apparatus for manufacturing a composite sheet material according to the present invention. The composite sheet material manufacturing apparatus 1 of the present invention is composed of at least a heat treatment unit 2, a cooling treatment unit 3, and an operation processing unit 4.

In the composite sheet material manufacturing apparatus 1 of FIG. 1, the heat treatment unit 2 is composed of a plurality of heating bodies 21. The heating body 21 has a rod shape, and its cross-sectional shape is round, square, or the like. In FIG. 1, the cross-sectional shape is round. Although not shown, a heater and a temperature sensor are set in each of the heating bodies 21 and are controlled to reach a certain fixed temperature. The heating temperature may be controlled by incorporating a heater and a sensor into each of the heating bodies, or by incorporating a sensor only in a certain heating body and controlling a plurality of the heating bodies at once. Although each control method can perform heating with high accuracy, the equipment cost is high. The batch control method may cause variations in the heating temperature, but the equipment cost can be suppressed. The heating temperature may be set to a temperature at which the resin material melts or a temperature at which the viscosity of the resin decreases when the resin material is heated and pressurized so that the resin material can adhere to, semi-impregnated or impregnated with the fiber material. As a guideline for the heating temperature, the temperature above and below the glass transition temperature (Tg) or melting point (Tm) of the resin is used.

The cooling processing unit 3 is composed of one cooling body 31. The plate-shaped cooling body 31 is provided with a through hole through which the heating body 21 can pass. Then, as a method of cooling the cooling body 31, the cooling pipe 32 is penetrated so that cooling air, cooling water, cooling oil, or the like can be circulated. The cooling temperature may be set to a temperature at which the resin material does not melt or a temperature at which the resin material does not adhere to the cooling body 31 when heated and pressurized. The cooling temperature is preferably equal to or lower than the glass transition temperature (Tg) of the resin. The cooling temperature may be controlled to a set temperature by measuring the temperatures of circulating air, water, and oil with a sensor or the like. In FIG. 1, one cooling body 31 allows the periphery of each heating region (heating body 21) to be set as a cooling body, but one cooling body 31 is arranged in one heating body 21. It is also possible to control.

The operation processing unit 4 is a mechanism for raising and lowering the heat processing unit 2 and the cooling processing unit 3. A pressurizing cylinder 41 for raising and lowering the heat treatment unit 2 and the cooling treatment unit 3, a pressurizing rod 42 for accurately transmitting the operation of the pressurizing cylinder, a fixing plate 43 for fixing the pressurizing cylinder 41, and the heat treatment unit 2 and cooling. The movement of the pressure plate 45 and the pressure plate 45 that fix the guide rod 44, the heat treatment unit 2 and the cooling treatment unit 3 to smoothly and accurately move the processing unit 3 up and down, and transmit the movement of the pressurizing cylinder 41. A spring 46 that transmits heat to the heating body 21 and the cooling body 31, and fasteners 47, 48, etc. that prevent the amount of movement of the heat treatment unit 2 and the cooling treatment unit 3 due to pressurization from exceeding a certain fixed amount. It is composed of.

FIG. 2 is an explanatory diagram for manufacturing the composite sheet material S from the fiber material T and the resin material R by using the composite sheet material manufacturing apparatus 1 shown in FIG.

In FIG. 2, the resin material R is arranged on both surfaces of the fiber material T, and in that state, the resin material R is overlapped while passing between the pair of guide rollers 61 to form the material to be molded M, and the material M to be molded is continuously formed. It is supplied on the transport belt 63. The belt 63 is in a state of being tensioned by one of the guiding roller 61 and the driving roller 62. The belt 63 is driven by rotating the drive roller 62 at a certain speed by a drive mechanism (not shown). The material of the belt may be metal or resin. Further, the state of the belt may be either a sheet shape or a net shape.

As shown in FIG. 2A, the composite sheet material manufacturing apparatus 1 is arranged on the upper surface of the material to be molded M. That is, the material to be molded M is arranged between the transport belt 63 and the composite sheet material manufacturing apparatus 1. Then, from the state shown in FIG. 2A, the pressurizing cylinder 41 fixed to the fixing plate 43 operates to lower the pressurizing rod 42, that is, the heat treatment section 2 and the cooling treatment section 3 are made of the material to be molded. It operates in the direction of pressurizing M. As the pressurizing rod 42 descends, the pressurizing plate 45 descends. At this time, since the guide rod 44 fixed to the fixing plate 43 is passed through the pressure plate 45, the pressure plate 45 descends smoothly and accurately. Then, the pressurizing plate 45 pressurizes the spring 46 connected to the plurality of heating bodies 21 and one cooling body 31, thereby lowering the heating body 21 and the cooling body 31.

In the state shown in FIG. 2B, the pressurizing cylinder 41 operates and the pressurizing rod 42 is lowered, so that the pressurizing plate 45 lowers the heating body 21 and the cooling body 31, but is connected to the cooling body 31. The stopper 47 attached to the upper part of the guide rod 44 comes into contact with the fixing plate 43 so that the cooling body 31 does not descend any further. The position of the stopper determines the distance between the cooling body and the material to be molded.

In the state shown in FIG. 2C, the pressurizing cylinder 41 operates and the pressurizing rod 42 is lowered to further lower the pressurizing plate 45, lowering the heating body 21 through the spring 46, and only the heating body 21. Is in contact with the material M to be molded. At this time, the reason why the cooling body 31 does not lower any more is that the stopper 47 for the cooling body is in contact with the fixing plate 43. Further, in the figure, a plurality of heating bodies 21 are arranged, and a spring 46 is arranged in each heating body 21. By doing so, each heating body 21 receives the pressing force from the pressure plate 45 through the spring 46, but when the material M to be molded is pressed, even if the material M to be molded has a difference in thickness. By the action of the spring 46, each of the heating bodies 21 can pressurize the material M to be molded.

When the heating body 21 contacts or pressurizes the material M to be molded, the resin material R constituting the material M to be molded softens or melts and adheres to the fiber material T, is semi-impregnated or impregnated, and the material M to be molded is composited. It is molded into the sheet material S.

Here, the adhesion means a state in which the resin material is attracted to the fiber located on the surface of the fiber material, and the resin material hardly penetrates into the inside of the fiber material. Further, semi-impregnation means a state in which the resin material partially permeates the inside of the fiber material, and impregnation means a state in which the resin material completely permeates the inside of the fiber material.

Adhesion, semi-impregnation or impregnation can be controlled by controlling the time for the heating body 21 to contact or pressurize the material M to be molded, the pressing force, the temperature of the heating body, and the like. For example, if the temperature of the heated body is higher than the melting temperature of the resin, the force to pressurize the material to be molded is large, and the pressurizing time is sufficiently long, the resin material melts and completely penetrates into the fiber material. It becomes possible. Further, when the temperature of the heated body is set to such that the resin does not melt or the resin is pressed in a short time, the resin material can adhere to the surface of the fiber material.

Then, although not shown, the pressurizing rod 42 is raised by the operation of the pressurizing cylinder 41, and the pressurizing plate 45 is raised. That is, it operates in the direction of separating the heat treatment unit and the cooling treatment unit from the composite sheet material. The pressurizing plate 45 rises to the stopper 48 connected to the heating body 21 and the cooling body 31, respectively, and when further raised, the stopper 48 is fixed to the guide rod 44, so that the heating body 21 and the cooling body 31 rise. That is, it operates in a direction further away from the composite sheet material. Then, the state shown in FIG. 2A is obtained.

In FIG. 2 of the present invention, there is a moving portion 5 that moves the composite sheet material manufacturing apparatus 1 according to the movement of the material M to be molded. The moving unit 5 is covered with a moving cylinder 51 for moving the composite sheet material manufacturing apparatus 1, a moving rod 52 for accurately transmitting the operation of the moving cylinder, a heat treatment unit 2, a cooling processing unit 3, and an operation processing unit 4. The operation of the moving rail 53 for moving one side of the molding material M, the moving roller 54 for smooth movement, and the moving rod 52 is accurately applied to the heat processing unit 2, the cooling processing unit 3, and the operation processing unit 4. It is composed of a connecting rod 55 that conveys to.

As the operation of the moving unit 5, for example, when the material M to be molded is continuously moving, the heat treatment unit 2, the cooling treatment unit 3, and the operation processing unit 4 are moved at the same speed and in the same direction as the material M to be molded. The heat treatment unit 2, the cooling treatment unit 3, and the operation processing unit 4 are moved to a predetermined original position at the moment when the heating body 21 of the heat treatment unit 2 is separated from the composite sheet material S. Then, from that location, the heat treatment unit 2, the cooling treatment unit 3, and the operation processing unit 4 are moved at the same speed as the material M to be molded and in the same direction. During this movement, the operation processing unit 4 is operated to lower the heat treatment unit 2 and the cooling treatment unit 3 so as to approach the material M to be molded, and further, the heating body 21 is brought into contact with the material M to be molded. ..

In FIG. 2, the material to be molded M is arranged between the transport belt and the apparatus for manufacturing the composite sheet material, and heating and pressurizing is performed from one side of the material M to be molded to manufacture the composite sheet material S. However, the composite sheet material manufacturing apparatus may be arranged on both surfaces of the material M to be molded, and heating and pressurizing may be performed from both surfaces of the material M to be molded to manufacture the composite sheet material S.

In FIG. 2, the resin material R is arranged on the surface of the fiber material T as the material M to be molded. The fiber material T is a sheet-like material in which a plurality of reinforcing fiber bundles such as carbon fiber bundles, glass fiber bundles, and aramid fiber bundles are arranged and aligned in one direction, and a cloth-like material obtained by weaving and knitting the reinforcing fiber bundles. It is a non-woven material in which the reinforcing fiber bundle is made into short fibers and entwined. It should be noted that these materials may be used alone or in combination to form the fiber material T.

Examples of the resin material R include thermosetting resins such as epoxy resin and unsaturated polyester resin, or polyamide (PA), polycarbonate (PC), polyphenylene sulfide (PPS), polyethersulfone (PES), and polyether. Thermoplastic resins such as imide (PEI) and polyetheretherketone (PEEK). The form includes a film, a non-woven fabric, and the like.

The material M to be molded is a state in which fibers and resin are already integrated, that is, a plurality of sheets in which the resin is impregnated or semi-impregnated in the fiber bundle are stacked in the same direction or in different directions. It may be a pseudo-isotropic laminate in which a prepreg sheet impregnated or semi-impregnated with a resin in a fiber bundle is cut into a strip shape and the strip shape is scattered in a sheet shape.

FIG. 3 shows the relationship between the heat treatment section and the cooling treatment section of the composite sheet material manufacturing apparatus described with reference to FIG. FIG. 3 is a view seen from a portion of the heating body 21 in contact with the material to be molded. A cooling body 31 is arranged around the heating body 21.

A heating region is set by the heating body 21, and the surrounding area is set to a cooling state by the cooling body 31. In FIG. 3A, the heating surface of the heating body 21 in contact with the material to be molded is round, in FIG. 3B, the heating surface of the heating body 21 in contact with the material to be molded is square, and in FIG. 3C, The heating surface of the heating body 21 in contact with the material to be molded has an elongated shape. The cooling state may be set so as to surround the periphery of the heating body as shown in FIGS. 3A and 3B, or along the long side of the elongated heating body as shown in FIG. 3C. A cooling state may be set.

When the heated surface of the heated body comes into contact with the material M to be molded and pressurized, the resin material R melts and adheres to the fiber material T, is semi-impregnated or impregnated, and then the heated body is separated from the material M to be molded. At this time, by setting the cooling state around the heating surface of the heating body, it is possible to prevent the molten resin or fiber from adhering to the heating surface of the heating body. When the area of the heated surface of the heating body is increased, the area where the resin is melted or softened becomes large, and the resin and fibers are likely to adhere to the heating surface of the heating body.

As a result of examination by the inventors, when the heating surface of the heating body is round, the area is about 800 mm ² or less, the diameter is about 30 mm or less, and the diameter is preferably in the range of about 3 mm to 15 mm. If the diameter is 3 mm or less, the area of heating and pressurizing the resin is narrow, and the adhesion, semi-impregnation or impregnation of the resin material R to the fiber material T becomes insufficient. If the diameter is 15 mm or less, the resin and fibers can be more reliably prevented from adhering to the heating surface of the heating body.

When the heating surface of the heating body is square, the area should be about 900 mm ² or less, the length of vertical x horizontal should be about 30 mm or less x 30 mm or less, and the length of one side should be in the range of about 3 mm to 15 mm. Is preferable. If the length of one side is 3 mm or less, the area of resin adhesion, semi-impregnation or impregnation is narrow, and the adhesion, semi-impregnation or impregnation of the resin material R to the fiber material T becomes insufficient. When the length of one side is 15 mm or less, it is possible to more reliably prevent the resin and fibers from adhering to the heating surface of the heating body.

It is possible to more reliably prevent resin and fibers from adhering to the heating surface of the heating body. When the heated body has an elongated shape, the long side length of the shape is at least twice the short side length, the short side length is 30 mm or less, and the length is in the range of about 3 mm to 15 mm. Is preferable. If the short side length is 3 mm or less, the resin adhesion, semi-impregnation or impregnation area is narrow, and the resin material R adhesion to the fiber material T, semi-impregnation or impregnation is insufficient. When the short side length is 15 mm or less, the resin and fibers can be more reliably prevented from adhering to the heating surface of the heating body.

As for the gap between the heating body 21 and the cooling body 31, the wider the gap between the heating body 21 and the cooling body 31, the more the resin material R of the material M to be molded receives heat from the heating body and melts, and the area of the heating surface of the heating body 21. It becomes more widely melted. As the molten area of the resin becomes wider, the molten resin easily adheres to the heating surface of the heating body 21. However, if the gap between the heating body 21 and the cooling body 31 becomes too narrow, it becomes difficult to maintain the set temperature of the heating body 21 due to the influence of the cooling body 31. Further, the movement of the heating body 21 such as ascending / descending may come into contact with the cooling body 31, and the smooth and accurate movement of the heating body 21 may be hindered. Therefore, as a result of examination by the inventors, it is preferable that the gap between the heating body 21 and the cooling body 31 is set in the range of 0.1 mm to 10 mm, more preferably in the range of 0.5 mm to 2 mm.

In addition, in FIGS. 3A and 3B, the cooling state is configured without interruption around the heating body 21, but the cooling state is configured while interrupting the surroundings set by the heating body. Is also good.

FIG. 4 shows the relationship between the heat treatment section and the cooling treatment section of the composite sheet material manufacturing apparatus described with reference to FIG. A plurality of through holes are provided in one cooling body 31, and the heating body 21 is arranged in the through holes. In FIG. 4, as the heating body 21, a heating body 21 having a quadrangular cross-sectional shape is used.

By doing so as shown in FIG. 4, a cooling body is formed around the heating region obtained by each heating body 21. Then, in order to cool the cooling body 31, a cooling pipe 32 is passed through the cooling body 31, cooling water or cooling oil flows from one of them, and the cooling water or cooling oil is discharged from the other pipe. However, it is controlled to reach a constant temperature by circulating the cooling water.

The plurality of heating bodies 21 are arranged at regular intervals in the vertical direction and the horizontal direction, but may be arranged in a staggered pattern. Further, in FIG. 4, the heating surface of the heating body has a quadrangular shape, but it may have a round shape or an elongated shape, and a plurality of them may be arranged. In FIG. 4, one cooling body is used, but one cooling body may be provided for each heating body, and a plurality of combinations thereof may be arranged.

FIG. 5 is an apparatus having a configuration different from that of the composite sheet material manufacturing apparatus 1 described with reference to FIGS. 1 and 2. In FIGS. 1 and 2, the tip portion of the heating body 21 protrudes from the bottom surface of the cooling body 31, that is, the surface facing the material M to be molded, but in FIG. 5, the tip portion of the heating body 21 is projected. Is located in the cooling body 31.

From this state, the pressurizing cylinder 41 fixed to the fixing plate 43 is operated to lower the pressurizing rod 42, that is, the heat treatment section 2 and the cooling process section 3 are pressed against the material M to be molded. Let me. As the pressurizing rod 42 descends, the pressurizing plate 45 descends, and the heating body 21 and the cooling body 31 also descend. At this time, by attaching the position of the stopper 47 attached to the guide rod 44 to the fixing plate 43 at a sufficient distance, the cooling body 31 can be lowered until it comes into contact with the material M to be molded, and further, the pressurizing cylinder 41. By the operation of, the cooling body 31 can be pressed against the material to be molded and pressurized.

When the pressure plate 45 is further lowered by the operation of the pressurizing cylinder 41 while the cooling body 31 is in contact with or pressed against the material M to be molded, the heating body 21 is further lowered through the spring 46 and comes into contact with the material M to be molded. I will be pressured. When the heating body 21 contacts or pressurizes the material M to be molded, the resin material R constituting the material M to be molded softens or melts and adheres to the fiber material T, is semi-impregnated or impregnated, and the material M to be molded is composite. It is molded into the sheet material S. At this time, the spring 46 that pushes the cooling body 31 further contracts, and the material M to be molded can be firmly pressed.

Then, when the pressurizing cylinder 41 is operated to raise the pressurizing rod 42 and the pressurizing plate 45 is raised, that is, when the heat treatment section 2 and the cooling process section 3 are operated in a direction to be separated from the composite sheet material S, the pressurizing plate is operated. The 45 rises to the stopper 48 connected to the heating body 21 and the cooling body 31, respectively. At this time, there is a difference between the pushing amount of the spring 46 pushing the cooling body 31 and the pushing amount of the spring 46 pushing the heating body 21. Since the spring 46 that pushes the cooling body 31 is more contracted, the heating body 21 is separated from the composite sheet material S before the cooling body 31. Separating the heating body 21 from the composite sheet material S in a state where the cooling body 31 is in contact with the composite sheet material S means that resin or fibers are attached to the heating surface of the heating body and the fibers meander. Can be prevented more

In FIG. 5, the cooling body 31 is attached to the heat insulating plate 33 to form the cooling processing unit 3. By providing the heat insulating plate 33, the heating body 21 and the cooling body 31 are less likely to be affected by heat, and each of them can be easily controlled with respect to the set temperature.

FIG. 6 is an apparatus having a configuration different from that of the composite sheet material manufacturing apparatus 1 described with reference to FIGS. 1, 2 and 5. Although not shown in FIGS. 1, 2, and 5, the heater 21 is a mechanism in which a heater and a temperature sensor are set and controlled so as to reach a certain fixed temperature. In the embodiment, a method is adopted in which a plurality of heating bodies 21 are brought into contact with the heating plate 22 to heat them.

A plurality of heating bodies 21 are arranged, and each is set so as to penetrate the heating plate 22 and the cooling body 31. A heat insulating plate 32 is arranged between the heating plate 22 and the cooling body 31 so that heat transfer does not occur between the heating plate 22 and the cooling body 31. Then, the space between the heating plate 22 and the heat insulating plate 32 is set so as to provide a gap equal to or larger than the distance between the cooling body 31 and the material M to be molded.

Then, the heating body 21 is in contact with the heating plate 22 by the spring 46, and the heating body 21 is heated by the heating plate 22. By enlarging the portion of the heating body 21 that comes into contact with the heating plate 22, the heating body 21 is stably heated in a short time. Further, although not shown, a temperature sensor is provided at the tip of the heating body 21, and the heating plate 22 is heated by a bar heater 23 incorporated therein so that the heating body 21 reaches a predetermined temperature. The temperature sensor provided on the heating body 21 may be installed on all the heating bodies 21, or may be installed only on the heating body 21 located in a typical portion. By providing the heating plate 22 and heating the plurality of heating bodies 21 as shown in FIG. 6, it is possible to reduce the device cost.

From this state, the pressurizing cylinder 41 fixed to the fixing plate 43 is operated to lower the pressurizing rod 42, that is, the heat treatment section 2 and the cooling process section 3 are pressed against the material M to be molded. First, the cooling body 31 contacts the material M to be molded and pressurizes it through the spring 46 that pushes the heat insulating plate 32. Then, when the pressure plate 45 is lowered by the pressurizing cylinder 41 while the cooling body 31 pressurizes the material M to be molded, the heating body 21 is further lowered through the spring 46 that pushes the heating body 21 and the material M to be molded is further lowered. Comes in contact with. When the heating body 21 contacts or pressurizes the material M to be molded, the resin material R constituting the material M to be molded softens or melts and adheres to the fiber material T, is semi-impregnated or impregnated, and the material M to be molded is composite. It is molded into the sheet material S.

Then, when the pressurizing cylinder 41 is operated to raise the pressurizing rod 42 and the pressurizing plate 45 is raised, that is, the heat treatment section 2 and the cooling treatment section 3 are operated in a direction to be separated from the composite sheet material S, first, The heating body 21 is separated from the composite sheet material S, and then the cooling body 31 is separated from the composite sheet material S. Separating the heating body 21 from the composite sheet material S in a state where the cooling body 31 is in contact with the composite sheet material S means that the resin or fiber adheres to the surface of the heating body and the fibers meander. It will be possible to prevent more

<Manufacturing equipment> A composite sheet material was manufactured by the manufacturing equipment shown in FIG. As shown in FIG. 7, the heating body 21 of the composite sheet material manufacturing apparatus penetrates the cooling body 31, and the composite sheet material has 10 lines at intervals of 30 mm in the traveling direction and 6 lines at intervals of 50 mm in the width direction. , Arranged side by side in a staggered pattern. In the cooling body 31, a cooling pipe penetrates between the heating body 21 and the heating body 21, and cooling water circulates. A thermocouple is set at the tip of a certain heating body 21 among the plurality of heating bodies 21, and the temperature of the plurality of heating bodies 21 is controlled. The tip of the heating body 21 has a circular shape and a diameter of 5 mm.

<Materials used and materials to be molded> As materials used, carbon fiber bundles (manufactured by Mitsubishi Chemical Corporation; TR50S-15K-GF 15,000 / bundle single yarn diameter 7 μm) are used as fiber materials, and thermoplastic resin material PA6 is used as resin materials. Using a resin film (manufactured by Mitsubishi Chemical Co., Ltd .; Diamilon thickness 20 μm), fiber graining of about 43 g / m on both surfaces of the PA6 resin film by the method for producing a semi-prepreg sheet material of Example 1 of JP2016-027956 ^{A semi-prepreg sheet having a width of 180 mm, which was semi-impregnated with 2,} was produced, and five sheets of the semi-prepreg sheets in the thickness direction were continuously stacked as a material to be molded.

<Manufacturing Conditions> The temperature of the tip of the heating body 21 of the composite sheet material manufacturing apparatus was controlled so as to be 300 degrees. The material to be molded was run at a speed of 3 m / min by a transport belt. In the composite sheet material manufacturing equipment, the heat treatment unit and the cooling treatment unit move down at the same speed as the material to be molded while they are in contact with and contact with the material to be molded, and then the heat treatment unit and the cooling treatment unit move. It was set to repeat the operation of raising and returning to the initial position. The repetition was 1 cycle in 6 seconds. The time for the heat treatment unit to contact and contact the material to be molded was set to 2 seconds. Further, the spring was selected so that the force with which the heating body 21 pressurizes the material to be molded is about 20 N.

<Manufacturing state of composite sheet material> When this production was carried out, it was confirmed that the heated body of the composite sheet material manufacturing apparatus contacted the material to be molded and repeatedly separated from each other smoothly. In addition, it was confirmed that there was no problem of carbon fibers and resin adhering to the heated body during the production, and that a continuous composite sheet material was produced. In addition, as a result of checking the state of the manufactured composite sheet material, the semi-prepreg sheet in which five sheets were stacked was in a state where the carbon fiber bundle was impregnated with resin at the portion contacted by the heating body, and as a sheet. It was confirmed that they were integrated.

1 Composite sheet material manufacturing equipment 2 Heat treatment unit 21 Heating unit 22 Heating plate 23 Bar heater 3 Cooling processing unit 31 Cooling body 32 Cooling body 32 Cooling pipe 33 Insulation plate 4 Operation processing unit 41 Pressurizing cylinder 42 Pressurizing rod 43 Fixing plate 44 Guide rod 45 Pressurizing plate 46 Spring 47, 48 Stopper 5 Moving part 51 Moving cylinder 52 Moving rod 53 Moving rail 54 Moving roller 55 Connecting rod 6 Seat transport part 61 Guide roller 62 Drive roller 63 Transport belt T Fiber material R Resin material M Molded material S Composite sheet material

Claims (11)

In the method for producing a composite sheet material in which a material to be molded composed of a fiber material and a resin material is heated and pressed to adhere the resin material to the fiber material, semi-impregnated or impregnated to form the composite sheet material, intervals are provided in the molding region. The periphery of the plurality of vacant heating regions is set to a cooling state where the temperature is lower than the melting temperature of the resin material, and the resin material is melted by heating and pressurizing the material to be molded in the heating region in the cooling state. A method for producing a composite sheet material, in which the resin material is adhered to, semi-impregnated or impregnated with the fiber material. The composite sheet according to claim 1, wherein the molding region is relatively moved with respect to the material to be molded, and the material to be molded is sequentially heated and pressed in the heating region in accordance with the relative movement of the material to be molded. Material manufacturing method. A cooling treatment unit that sets the periphery of the heating region to the cooling state is brought close to, or in contact with, or after contact with the material to be molded, pressed to cool, and a heat treatment unit that heats and pressurizes the heating region is used as the material to be molded. The resin material is adhered to, semi-impregnated or impregnated with the fiber material by contacting or pressurizing after the contact, and the heat-treated portion is separated from the material to be molded, and then the cooling-treated portion is separated from the material to be molded. The method for producing a composite material according to claim 1 or 2. The method for producing a composite sheet material according to any one of claims 1 to 3, wherein a plurality of molding regions are arranged. The method for producing a composite sheet material according to claim 4, wherein the pressing force is adjusted to heat and pressurize in each of the heating regions of the plurality of molded regions. A heat treatment unit is provided which heats and pressurizes a material to be molded, which is composed of a fiber material and a resin material, to melt the resin material, and the melted resin material is attached to the fiber material, semi-impregnated or impregnated to form a composite sheet material. In the composite sheet material manufacturing apparatus, the heat treatment unit includes a plurality of heating bodies arranged at predetermined intervals, and the periphery of the heating bodies is cooled to a temperature lower than the melting temperature of the resin material. A device for manufacturing a composite sheet material including a cooling treatment unit for setting a state, and an operation processing unit for moving the heat treatment unit and the cooling treatment unit in a direction approaching or separating from the surface of the material to be molded. .. The operation processing unit sets the surface in a cooled state by approaching, contacting, or after contacting the surface of the material to be molded with the cooling processing unit to set the surface to a cooled state, and the surface of the material to be molded is set to a cooled state. The apparatus for producing a composite sheet material according to claim 6, wherein the heat treatment unit is brought into contact with the heat treatment unit to be set to heat and pressurize. The apparatus for producing a composite sheet material according to claim 6 or 7, further comprising a moving portion for moving at least the heat treatment portion and the cooling treatment portion relative to the material to be molded. The apparatus for producing a composite sheet material according to any one of claims 6 to 8, wherein the heated body has a round heating surface in contact with the material to be molded, and the area of the heating surface is 800 mm ^{2 or less.} .. The apparatus for producing a composite sheet material according to any one of claims 6 to 8, wherein the heated body has a square heating surface in contact with the material to be molded, and the area of the heating surface is 900 mm ^{2 or less.} .. In the heated body, the heating surface in contact with the material to be molded is formed in an elongated shape, and the long side length of the heating surface is twice or more the short side length and the short side length is 30 mm or less. The apparatus for producing a composite sheet material according to any one of claims 6 to 8.

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