JP3351155B2 - SMC sheet and method and apparatus for manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet molding compound (SMC) sheet in which a reinforcing fiber material is impregnated with a matrix resin, and a method and an apparatus for producing the sheet.

[0002]

2. Description of the Related Art SMC sheets obtained by impregnating a matrix resin into a reinforcing fiber material such as glass fiber are used in many fields such as automobile panels as molding materials for FRP (fiber reinforced thermosetting resin) molded products. ing. The method of manufacturing this SMC sheet is described in, for example, Japanese Patent Application Laid-Open No. 5-220742, and its outline is shown in FIG. Diameter 1-5
A roving 1 in which a number of 0 μm glass monofilaments are converged is cut by a chopper 2, and a chopped strand 3 having a length of 5 to 50 mm is dropped on a carrier film 5. The surface of the carrier film 5 is coated with a paste of a matrix resin such as an unsaturated polyester resin, and the chopped strands 3 are overlaid on another carrier film on which the paste of the matrix resin is applied. And wound up with a roll to form an SMC sheet.

An SMC sheet can be efficiently manufactured by the above-described method. The SMC sheet manufactured by this method is cut by the chopper 2 into a predetermined length, and the length of the dropped chopped strand 3 is random. Therefore, an FRP product molded by heating and pressing with a mold using this SMC sheet has strength and rigidity F of each part as shown in FIG.
Is approximately pseudo-isotropic in all directions of the product.
This pseudo-isotropic property is a preferable property for general FRP products, but has the following problem depending on the type of FRP products.

FIG. 4 shows the front panel of a truck in FRP.
In this case, three points indicated by broken lines A in the figure are supported and attached to the body. When this front panel is manufactured using the above-mentioned SMC sheet, since the strength and rigidity of each part become pseudo-isotropic with a uniform thickness, a part B far away from the support attachment part A (one point in the figure) (Indicated by a dashed line), the amount of deformation increases when pressed from the surface. As a countermeasure, a cushion is attached to the back side of the part B of the product, or the entire front panel is formed by increasing the wall thickness.

[0005] It is advantageous to use an SMC sheet which is not quasi-isotropic but has a strength and rigidity inclining function as a molding material for FRP products such as the front panel. As shown in FIG. 5, the strength and rigidity of the molded product in the width direction D and the rigidity thereof have inclination characteristics, that is, the strength and rigidity of the 6L portion are large FL, the intermediate portion 6M is the middle FM, and the other side 6S is the Small F
As shown in FIG. 6, the direction of the three SMC sheets 6 cut into the cavity 8 of the molding die 7 was determined by using the SMC sheet serving as the S, and by changing the direction requiring strength and rigidity (B in FIG. 4). )), Set the 6L side with strength and rigidity large FL side by side, close the mold and mold. Since this molded product has the required strength and rigidity at each portion with a uniform thickness, the molded product can be reduced in weight and the need for an extra support member is eliminated.

[0006] Also, when ribs are formed on a part of an FRP product as shown in Fig. 7, it is advantageous to use an SMC sheet having a tilting function. 7B is a plan view of the FRP product, and FIG. 7A is a cross-sectional view taken along line XX of FIG. 7B. In order to mold the FRP product 9, as shown in FIG. 8, the SMC sheet 6 is put in the cavities of the molding dies 10A and 10B, the mold is closed, and heating and pressing are performed. At the time of molding, the molding portion 6S of the rib 9a of the SMC sheet 6 needs to flow more than the other portions 6L. Therefore, the pseudo-isotropic S
When an MC sheet is used, the rib 9a may be underfilled. The width direction D of the molded product as shown in FIG.
By using the SMC sheet 6 whose strength and rigidity have inclination characteristics, the material property of the molding portion 6S of the rib 9a is set such that the fluidity during molding is larger than the fluidity of the other portions 6M and 6L. The occurrence of underfill in the rib 9a of the product can be prevented.

Japanese Unexamined Patent Publication (Kokai) No. 5-460 discloses that reinforcing fibers to be mixed into an SMC sheet are composed of short fibers having a length of 1 to 5 mm, 5 to 30% by weight of the total reinforcing fibers, and long fibers having a length of 12 to 50 mm. 95 to 70% by weight, the reinforcing fibers are oriented in a specific direction at the terminal portion where the resin in the mold flows during molding, and FR
A description is given of a P molded product in which the direction is not generated in the strength.

[0008] JP-A-5-9301 discloses a layer composed of a thermoplastic resin and a non-directional short fiber reinforcement.
A molded article formed by laminating a layer composed of a thermoplastic resin and a short fiber reinforced material oriented in one direction and using this molding material to give directionality of strength and elastic modulus is described. Have been.

Japanese Patent Application Laid-Open No. Sho 60-125428 discloses a method in which a unidirectional reinforcing fiber which is linearly aligned at a longitudinal middle portion of a leaf spring is used, and has a non-linear shape having no directivity on both sides in the width direction. An FRP leaf spring is described that uses reinforced fibers to prevent cracking on both sides of the product leaf spring.

[0010] JP-A-4-216905 discloses SM
The length of the reinforcing fibers mixed into the C sheet is 3 to 10 mm,
It describes that the flowability of the molding material in the mold at the time of molding is good, and also describes that the length of the reinforcing fiber can be of two types within the above range.

JP-A-63-268604 discloses that S
The reinforcing fiber content in the vicinity of the end portion in the width direction of the MC sheet is increased by 5 to 10% by weight as compared with the reinforcing fiber content in the central portion in the width direction,
By using this molding material, an SMC molding material that compensates for the fluidity of the material in the mold at the time of molding so that the reinforcing fiber content of the FRP molded product is substantially the same at the terminal portion and the central portion is obtained. Has been described.

Japanese Patent Application Laid-Open No. 4-71827 discloses that
A method of manufacturing an SMC sheet in which a lightweight filler such as a glass microballoon is sprayed on a carrier film coated with a compound following a step of spraying a reinforcing fiber is described. An FRP molded product using this SMC sheet can be reduced in weight. It is.

[0013]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 5-220 is disclosed.
742, JP-A-5-460, JP-A-4-4-2
Since the strength and rigidity of the FRP molded product molded using this molding material are pseudo-isotropic, the SMC sheet described in Japanese Patent No. 16905 and Japanese Patent Application Laid-Open No. 4-71827
As in the case of the truck front panel and the molded product with ribs described above, it is necessary to change the thickness of each part and take measures to prevent the occurrence of underfill. Further, Japanese Patent Application Laid-Open Nos. Hei 5-9301, Hei.
The molding material described in Japanese Patent No. 268604 has different reinforcing fiber lengths and filling ratios in the width direction, but nothing is described about an efficient production method and apparatus thereof.

The present invention provides a manufacturing method and apparatus capable of efficiently manufacturing an SMC sheet having a tilting function in which the length and the filling ratio of reinforcing fibers and the like are changed in the width direction with a simple structure. It is an object of the present invention to provide a molding material capable of molding a lightweight molded article having a desired strength and rigidity with a desired thickness.

[0015]

According to the present invention, there is provided an SMC sheet manufacturing apparatus which cuts and scatters a reinforcing fiber on a carrier film coated with a matrix resin, and the other carrier film coated with a matrix resin thereon. In the apparatus for manufacturing an SMC sheet by combining the same, a chopper having the same outer diameter, in which the number of cutting blades is varied stepwise in the width direction of the carrier film for cutting the reinforcing fibers, is integrally rotated at a constant speed. It was done. In this chopper, the number of cutting blades is varied stepwise in the width direction, and choppers having different outer diameters in which the interval length between the cutting blades is all constant are integrally rotated at a constant speed, or the same in the width direction. A chopper having the same number of blades as the outer diameter may be provided in a divided manner, and each of the divided choppers may be driven at a different rotation speed.A conical feed roller for supplying the reinforcing fiber is provided, and the reinforcing fiber is provided. A chopper having a conical shape and the same number of cutting blades and a conical rubber roller facing the chopper may be provided for cutting, and the chopper may be driven at a constant speed. Also, a chopper having the same outer diameter and the same number of cutting blades is installed so as to rotate at a constant speed along the width direction of the carrier film, and the density of the reinforcing fiber bundle supplied to the chopper is stepwisely changed in the longitudinal direction of the chopper. It is possible to provide a guide for changing the temperature. Furthermore,
Instead of the chopper, it is also possible to install a sprinkler having a slot for storing reinforcing fibers cut to a predetermined length and having holes of different widths in the width direction of the carrier film.

The method for producing an SMC sheet according to the present invention uses a sprayer which stores reinforcing fibers cut to a predetermined length and has an equal hole width along the longitudinal direction of the carrier film. The spraying speed is changed continuously or stepwise in the width direction of the sprayer, and a sprayer having a slot having a uniform hole width along the longitudinal direction of the carrier film containing the glass microballoons is used, A glass micro-balloon spraying step of continuously or stepwise changing the spray moving speed of the carrier film in the width direction of the carrier film may be added in parallel to a normal reinforcing fiber spraying step.

The SMC sheet of the present invention contains reinforcing fibers cut to a predetermined length uniformly, and the filling amount of the glass microballoons is changed continuously or stepwise in the width direction of the sheet. .

[0018]

According to the first aspect of the present invention, an SMC sheet in which the length of the reinforcing fiber in the width direction is changed stepwise can be obtained. In the apparatus according to claims 2 to 4 and 7, an SMC sheet in which the filling factor of the reinforcing fibers in the width direction is changed continuously or stepwise can be obtained with a simple apparatus. The apparatus according to claim 5, wherein the length and the filling rate of the reinforcing fiber in the width direction are continuously changed.
A sheet is obtained. According to the manufacturing method of claims 8 and 9, an SMC sheet in which the filling rate of the reinforcing fibers or glass microballoons in the width direction is changed continuously or stepwise can be easily obtained. Further, the SMC sheet according to the tenth aspect enables molding of a lightweight molded article having a desired thickness and rigidity with a uniform thickness.

[0019]

FIG. 1 is an explanatory view showing a step of spraying reinforcing fibers having different lengths in the width direction on a carrier film.
FIG. 1A is a perspective view, and FIG. 1B is an explanatory view of a chopper. Diameter 1
A roving 1 in which a large number of glass monofilaments of about 50 .mu.m are bundled is cut by a chopper 2 and has a length of 5 to 5 .mu.m.
The chopped strand having a thickness of 0 mm is dropped and sprayed on the carrier film 5 coated with the matrix resin paste, and overlaid on the chopped strand in a sandwich shape with the carrier film coated with the matrix resin paste, and wound up with a roll. This is basically the same as the conventional manufacturing method shown in FIG. As shown in FIG. 1A, a large number of rovings 1 supplied at a constant speed between a rubber roller 4 and an auxiliary roller (not shown) facing the rubber roller 4 are passed between the rubber roller 4 and the chopper 2, and the chopper 2 is moved. The chopped strand cut by the blade is dropped on the carrier film 5 coated with the matrix resin paste, and scattered non-oriented.

The chopper 2 is shown as having two blades 2a in the width direction portion 2A, four blades 2b in 2B, and eight blades 2c in 2C, but actually increases the number by several times. The outer diameter of each cutting edge is the same and rotated integrally,
The length of the chopped strand cut at each cutting edge of the chopper 2 is changed in the width direction. The chopped strand that is dropped and sprayed on the carrier film 5 moving in the direction of the arrow has a long fiber length in the portion SL below the blade 2a,
In the case of SM below b, the length is short in the case of SS below 2c. In the figure, a small number of rovings 1 are exemplarily shown. However, since dozens to thousands of rovings 1 are actually cut, the carrier is cut. The chopped strands of each part spread on the film 5 are mixed at the boundary and randomly oriented.

In the SMC sheet manufactured by the above method, the length of the reinforcing fiber changes stepwise from long to short in the width direction. Therefore, FR using this SMC sheet
As shown in FIG. 5, the P-shaped product has strength and rigidity in the width direction D of the molded product having a slope characteristic, the strength and rigidity of the long fiber 6L portion is large FL, and the medium fiber portion 6M is medium FM. Other short fiber part 6S
When the front panel of the truck shown in FIG. 4 is formed, the SMC sheet is cut into appropriate dimensions and the cavity 8 of the forming die 7 is formed as shown in FIG.
The direction of the three SMC sheets is set in a portion (B in FIG. 4) where strength and rigidity are required, and the 6L side where strength and rigidity are large FL is set side by side and molded. Since this molded product has the necessary strength and rigidity in each part with a uniform thickness,
The weight can be reduced, and an unnecessary support member is not required.

When forming the FRP product 9 with ribs shown in FIG. 7, the above-mentioned SMC sheet is cut and the long fiber side is formed into the molded portion 6L of the main body, and the short fiber side is formed into the rib molded portion 6S. As shown in FIG. 8, the molding dies 10A, 10A
Set in the cavity of B, close the mold, and heat and pressurize. At the time of forming, the forming portion 6 of the rib 9a of the SMC sheet 6
Since S is a short fiber, it flows more than other parts 6L,
As in the case of using a quasi-isotropic SMC sheet, there is no danger that the ribs 9a of the molded product will be underfilled.

Next, SMC is performed by a method different from the above-described embodiment.
An example of a method and an apparatus for manufacturing an SMC sheet for imparting a tilt characteristic to the sheet will be described. The method of the first embodiment is based on S
The filling amount of the reinforcing fibers in the width direction of the MC sheet is constant and the length thereof is changed stepwise. However, in the method of the second embodiment, the length of the reinforcing fibers is all constant and the SMC sheet The filling amount of the reinforcing fibers is changed stepwise or continuously in the width direction.

FIG. 9 shows a chopper according to the second embodiment.
9A is a plan view, FIG. 9B is a side view, and parts other than the chopper are the same as those of the conventional SMC sheet manufacturing apparatus shown in FIG. The outer diameter of the blade edge of the chopper 12 is set to three stages of large, medium and small in the width direction, and the number of the blades 12L, 12M, 12S is changed according to the outer diameter. Increase the number of each blade several times), make all the intervals L between the blade edges equal,
Rotate coaxially together. Each blade 12 of this chopper 12
Each rubber roller 11S, 11M, facing L, 12M, 12S,
The outer diameter of 11L is changed according to the outer diameter of the cutting edge of the chopper 2 so as to be freely rotatable coaxially. A drive roller (not shown) of which size is changed to large, medium or small according to the diameter is provided.

When the chopper 12 rotates, each blade 12L, 1
2M, 12S and each rubber roller 11S, 1 facing these
Cut the rovings 1L, 1M, 1S with 1M, 11L respectively. Since the edge distance L between the blades 12L, 12M, and 12S is all constant, the fiber length to be cut is constant.
Since 2L has a large number of blades per rotation, a large amount is sprayed on VL on the carrier film 5, and a small amount is sprayed on VS. That is, the filling amount of the reinforcing fibers changes stepwise in the width direction of the carrier film 5. In this case, since the feed amount of the rovings 1L, 1M, 1S differs for each blade 12L, 12M, 12S according to the outer diameter of each cutting edge, a guide 13 for partitioning the rovings 1L, 1M, 1S is provided for each portion. I do.

In the SMC sheet manufactured by the above method, the filling factor of the reinforcing fibers changes stepwise in the width direction.
Since the FRP molded product using the sheet has a gradient characteristic in strength and rigidity in the width direction of the molded product, the strength and rigidity of the portion VL having a high filling rate are large, and the portion VS having a low filling rate is small. When the front panel of the truck shown in FIG. 4 is formed, it is advantageous similarly to the SMC sheet manufactured in the first embodiment. Further, the portion VS where the filling ratio of the SMC sheet is low has good fluidity at the time of molding, so that it is also advantageous when molding the ribbed FRP product 9 shown in FIG.

FIG. 10 shows a modification of the second embodiment shown in FIG. 9, in which blades 12L and 12M having large and medium outer diameters are provided on both sides in the width direction of the chopper 12, and blades 12S having a small outer diameter are provided in the middle. In this case, the filling rate of the reinforcing fibers on the carrier film 5 is the lowest filling rate VS in the middle part. In addition,
As a modification of the second embodiment shown in FIG. 9, the chopper is divided into three parts in the width direction with the same number of blades and the same outer diameter, and each is rotated coaxially at a different rotation speed, and each chopper is divided into three parts. Even if the rubber rollers of the same diameter that are driven to face each other are installed so as to be freely rotatable on the same axis, an SMC sheet in which the filling rate in the width direction of the reinforcing fibers of the same length is gradually changed can be obtained. .

FIG. 11 shows a third embodiment. A chopper 22 having the same number of blades and the same outer diameter is installed in opposition to the cylindrical rubber roller 21, and the density of the rovings 1 supplied to the chopper at a constant speed is made dense and narrow in the width direction of the carrier film 5. , Guide 20L of roving 1 on one side
When the spacing between the guides 20S on the opposite side is made coarse and the same number of rovings 1 are supplied to each guide, the filling ratio of reinforcing fibers of the same length in the width direction is changed stepwise. Is obtained.

FIG. 12 shows a fourth embodiment. 12A is a perspective view, FIG. 12B is a plan view of a chopped-strand sprayer, and FIG. 12C is an explanatory view of a modification of a spray hole. A funnel-shaped sprayer 30 is installed on the width direction of the carrier film 5, and the chopped strand 3 is supplied to the sprayer 30. The chopped strands 3 may be supplied from the hopper by installing the sprayer 30 below the chopper 2 shown in FIG. . A slot 3 is formed in the bottom of the sprayer 30 in the width direction of the carrier film 5.
1 and the slot width is large on one side 31a and 3 on the opposite side.
In 1b, it is continuously changed so as to be small.

A lid for opening and closing is attached to the bottom slot 31 of the sprayer 30. When the chopped strand is sprayed on the carrier film 5, the bottom lid is opened and the spreader 30 is vibrated. And the chopped strand 3 is hard to fall from the slot 31b, so that the amount of the chopped strand 3 to be spread on the carrier film 5 is reduced, and the filling rate of the reinforcing fibers of the same length in the width direction is increased by V.
An SMC sheet changed continuously like L-VM-VS is obtained. The shape of the slot 31 is changed as shown in (a), (b), and (c) of FIG.
By making the shape shown in (1), the filling factor of the reinforcing fibers in the width direction can be adjusted as desired.

FIG. 13 shows a fifth embodiment. A funnel-shaped sprayer 40 is installed along the longitudinal direction of the carrier film 5, and a chopped strand obtained by separately cutting roving into a predetermined same length is supplied to the sprayer 40 from a hopper. A hole 41 having the same width is formed in the bottom of the sprayer 40, and a lid that opens and closes is attached. When spraying the chopped strand on the carrier film 5, the lid at the bottom of the sprayer 40 is opened, and the sprayer 40 is moved in the width direction of the carrier film 5.
When the moving speed of the sprayer 40 is controlled to be high on one side H of the carrier film 5 and low on the other side L, the amount of chopped strands spread on the carrier film 5 becomes:
As shown on the right side of the figure, an SMC sheet is obtained in which the density in the width direction becomes dense and dense, and the filling factor in the width direction of the reinforcing fibers of the same length is continuously changed like VS-VL.

FIG. 14 shows a sixth embodiment. FIG. 14A is a front view, and FIG. 14B is a side view. Conventional SM shown in FIG.
In the C sheet manufacturing apparatus, roving 1 is replaced with chopper 2
A funnel-shaped disperser 50 is installed along the longitudinal direction of the carrier film 5 on the upstream side of the portion where the chopped strand 3 is dropped onto the carrier film 5. Put from supply. A hole groove 51 having the same width is formed at the bottom of the sprayer 50, and a lid that opens and closes is attached.

When spraying the glass microballoon 52 on the carrier film 5, the lid at the bottom of the sprayer 50 is opened, and the sprayer 50 is moved in the width direction of the carrier film 5. If the moving speed of the sprayer 50 is controlled to be slow on one side L of the carrier film 5 and high on the other side H, the amount of the glass microballoons 52 sprayed on the carrier film 5 becomes continuous in the width direction. Changes to The carrier film 5 moves to the right, and the chopped strands are evenly spread from the chopper 2 thereon.

As shown on the right side of FIG. 14B, an SMC sheet is obtained in which the chopped strands are uniformly scattered and the filling rate in the width direction of the glass microballoon 52 is continuously changed like BS-BL. Can be When the glass microballoon 52 is filled, the strength of the FRP molded product at that site is reduced, but the weight can be reduced. Therefore, this S
By using the MC sheet, it is possible to obtain a lightweight FRP molded product having a required strength and rigidity at each portion with a uniform thickness.

FIG. 15 shows a seventh embodiment. 15A is a front view, FIG. 15B is a side view, and FIG. 15C is a view seen from the X direction in FIG. 15A. The roving 1 is supplied to the opposing portion of the conical chopper 63 having the same number of blades as the conical rubber roller 62 by a pair of conical feed rollers 61, 61 that rotate at a constant speed. The supply amount of roving 1 is
In the large diameter side of the chopper 63, the fibers are cut into long fibers because the distance between the teeth is wide. On the other hand, on the small diameter side of the feed roller 61, the supply amount of the roving 1 is small, and on the small diameter side of the chopper 63, the spacing between the teeth is narrow, so that the fiber is cut into short fibers. A chopped strand is supplied. Therefore, it is possible to obtain an SMC sheet in which the length and the filling rate of the reinforcing fibers in the width direction are continuously changed from the side where the reinforcing fibers are long and the filling rate is large to the side where the reinforcing fibers are short and the filling rate is small.

FIG. 16 shows an eighth embodiment. FIG. 16 is a plan view of a cutting portion of the roving. Two pairs of conical feed rollers 61, 61 shown in FIG. 15 are used, and the large diameter portions of the pair of conical feed rollers of each set face each other. The roving 1 is provided so as to be positioned on one plane to constitute a supply unit (not shown) of the roving 1. The roving 1 from this supply unit is supplied to a pair of conical rubber rollers 71, 72 opposed to a pair of conical choppers 73, 74 having the same number of blades and facing large-diameter portions. . The supply amount of the roving 1 increases on the large-diameter side of the choppers 73 and 74, and the choppers 73 and 74 rotating at a constant speed ω cut the fiber into long fibers because the tooth spacing is wide. on the other hand,
On the small diameter side of the choppers 73 and 74, the supply amount of the roving 1 is small, and the interval between the teeth is narrow, so that the short fibers are cut. You. Therefore, the length and the filling rate of the reinforcing fibers in the width direction change from the central part where the reinforcing fibers are long and the filling rate is large to the both sides where the reinforcing fibers are short and the filling rate is small, and the SMC sheet in which the inclination function is largely changed is provided. can get.

In each of the above embodiments, an SMC sheet using a thermosetting resin as a matrix resin has been described.
The present invention can also be applied to a stampable sheet for FRTP molding using a thermoplastic resin as a matrix resin, and the reinforcing fibers are not limited to glass fibers, but may be carbon fibers, boron fibers, Kepler, or the like.

[0038]

According to the present invention, there is provided an SM having a simple structure and having a tilting function in which the length and filling rate of reinforcing fibers and the like are changed in the width direction.
A C sheet can be manufactured efficiently, and a lightweight molded article having the required strength and rigidity at each part with a uniform thickness can be obtained using the manufactured SMC sheet.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory view of a conventional method for manufacturing an SMC sheet.

FIG. 3 is an explanatory diagram of characteristics of a conventional SMC sheet.

FIG. 4 is an explanatory view of a molded product using an SMC sheet.

FIG. 5 is an explanatory diagram of characteristics of the SMC sheet of the present invention.

FIG. 6 is an explanatory view of a molding method using the SMC sheet of the present invention.

FIG. 7 is an explanatory view of another molded product using an SMC sheet.

FIG. 8 is an explanatory view of a molding method of the molded article of FIG. 7;

FIG. 9 is an explanatory view of a second embodiment of the present invention.

FIG. 10 is an explanatory view of a modification of FIG. 9;

FIG. 11 is an explanatory view of a third embodiment of the present invention.

FIG. 12 is an explanatory view of a fourth embodiment of the present invention.

FIG. 13 is an explanatory view of a fifth embodiment of the present invention.

FIG. 14 is an explanatory view of a sixth embodiment of the present invention.

FIG. 15 is an explanatory view of a seventh embodiment of the present invention.

FIG. 16 is an explanatory view of an eighth embodiment of the present invention.

[Explanation of symbols]

1 Roving 2, 12, 22 Chopper 3
Chopped strand 4, 11, 21 Rubber roller 5 Carrier film 40, 50 Sprayer 52 Glass micro balloon

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-460 (JP, A) JP-A-55-60531 (JP, A) JP-A-50-108372 (JP, A) JP-A-4- 71827 (JP, A) JP-A-5-9301 (JP, A) JP-A-63-268604 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29B 11/16

Claims (10)

(57) [Claims] 1. An apparatus for manufacturing an SMC sheet by cutting and dispersing reinforcing fibers on a carrier film coated with a matrix resin and combining another carrier film coated with a matrix resin thereon. An apparatus for manufacturing an SMC sheet, wherein a chopper having the same outer diameter and having the same number of cutting blades in the width direction of the carrier film for cutting the reinforcing fibers is integrally rotated at a constant speed. . 2. An apparatus for manufacturing an SMC sheet by cutting and dispersing reinforcing fibers on a carrier film coated with a matrix resin, and combining another carrier film coated with a matrix resin thereon to produce an SMC sheet. For cutting the reinforcing fibers, the number of cutting blades is varied stepwise in the width direction of the carrier film, and choppers having different outer diameters in which the interval length between the cutting blades is all constant are integrally rotated at a constant speed. An SMC sheet manufacturing apparatus characterized by being installed. 3. An apparatus for producing an SMC sheet by cutting and dispersing reinforcing fibers on a carrier film coated with a matrix resin, and combining another carrier film coated with a matrix resin thereon to produce an SMC sheet. Choppers having the same outer diameter and the same number of blades are provided in the carrier film in the width direction for cutting the reinforcing fibers, and the divided choppers are installed so as to be driven at different rotational speeds. SMC sheet manufacturing equipment. 4. An apparatus for producing an SMC sheet by cutting and dispersing reinforcing fibers on a carrier film coated with a matrix resin and combining another carrier film coated with a matrix resin thereon. A chopper having the same outer diameter and the same number of cutting blades for cutting the reinforcing fibers is installed so as to rotate at a constant speed along the width direction of the carrier film, and the density of the reinforcing fiber bundle supplied to the chopper is determined by the chopper. An apparatus for manufacturing an SMC sheet, comprising a guide that changes stepwise in a longitudinal direction of the sheet. 5. An apparatus for manufacturing an SMC sheet by cutting and dispersing reinforcing fibers on a carrier film coated with a matrix resin and combining another carrier film coated with a matrix resin thereon to produce an SMC sheet. A conical feed roller for supplying fibers is provided, and a chopper having a conical and the same number of cutting blades for cutting reinforcing fibers and a conical rubber roller facing the chopper are provided, and the chopper is driven at a constant speed. SMC characterized by the following:
Sheet manufacturing equipment. 6. A pair of conical feed rollers for supplying the reinforcing fibers are provided so as to oppose each other so that each generatrix is located on one plane, and the chopper and the conical rubber roller opposing the chopper oppose each other. The SMC sheet manufacturing apparatus according to claim 5, wherein a pair is installed. 7. A reinforcing fiber cut to a predetermined length is sprayed on a carrier film coated with a matrix resin,
In an apparatus for manufacturing an SMC sheet by combining another carrier film coated with a matrix resin thereon, a reinforcing fiber cut to a predetermined length is accommodated, and a groove having a different hole width in the width direction of the carrier film. An apparatus for manufacturing an SMC sheet, comprising a sprayer having holes. 8. Reinforcing fibers cut to a predetermined length on a carrier film coated with a matrix resin,
In a method of manufacturing an SMC sheet by combining another carrier film having a matrix resin applied thereon, a reinforcing fiber cut to a predetermined length is stored, and a hole width is equal along the longitudinal direction of the carrier film. A method for producing an SMC sheet, characterized by using a sprayer having a sprayer, and continuously or stepwise changing a spraying moving speed of the sprayer in the width direction of the carrier film. 9. A reinforcing fiber cut to a predetermined length is sprayed on a carrier film coated with a matrix resin,
In a method of manufacturing an SMC sheet by combining another carrier film coated with a matrix resin thereon, a glass microballoon is housed, and has a slot having an equal width along the longitudinal direction of the carrier film. A method for producing an SMC sheet, further comprising a step of using a sprayer and adding a glass microballoon spraying step of continuously or stepwise changing a spraying moving speed of the carrier film in the width direction of the sprayer. 10. An SMC sheet characterized by uniformly containing reinforcing fibers cut to a predetermined length and changing the filling amount of glass microballoons continuously or stepwise in the width direction of the sheet.