JPH0585333B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Fields>> The present invention has excellent appearance and gloss, and also has electrical insulation properties.In recent years, the present invention has also been used in the production of artificial marble, architectural wall materials, kitchen counters, and washroom counters. A method for producing BMC (bulk molding compound) molding material, whose uses are expanding, such as furniture tops, bathroom units, bathtubs, etc.
SMC (Sheet Molding Compound) is not only manufactured as a BMC molding compound, but also used as a structural material for automobile parts, housing equipment, etc.
The present invention relates to the provision of a dual-purpose manufacturing device that can also be used for manufacturing molding materials.

《Prior art》 Conventionally, in order to manufacture this type of molding material,
Since dedicated manufacturing equipment for SMC and BMC must be prepared, the entire equipment is extremely expensive, and when a dedicated manufacturing equipment for the BMC molding material is used, its configuration is not appropriate as described below. Therefore, there are defects that make it difficult to obtain a fully satisfactory product.

In other words, the manufacturing equipment dedicated to SMC molding materials is the second
As shown in the figure, A liquid resin compound a for SMC
is sent to flow jet mixer b, where SMC
The mixed liquid resin compound d for SMC obtained by mixing with liquid resin compound C for SMC was placed on the synthetic resin film f that was drawn into the lower conveyor belt e for impregnation, and was drawn into the upper conveyor belt g for impregnation. A predetermined amount of the synthetic resin film h is supplied onto the synthetic resin film f, and a glass chop k obtained by the glass lobbing i and the robing cutter j is provided onto the synthetic resin film f, and the glass chop k is transferred to the lower conveyor belt for impregnation e and the glass chop k obtained by the impregnating lower conveyor belt e. The glass chop k is fed into the impregnation gap l formed between the upper conveyor belt g and the glass chop k is fully impregnated with the SMC mixed resin compound d by the roll pressure of the impregnation roller m. The impregnated material sandwiched between f and h is wound together by a winder n.

On the other hand, as shown in Figure 3, the BMC molding material manufacturing equipment supplies BMC A-liquid resin compound o, BMC B-liquid resin compound p, and various powders q from a screw feeder r. The mixed powder sent out through the machine s is supplied to the mixer t, and in the process of kneading these o, p, and q by the mixer t, the glass chops obtained by the glass lobing u and the roving cutter v are added to the mixer t. The glass chop w is impregnated with a kneaded mixture of o, p, and q, and the mixture obtained from the mixer t is kneaded and extruded by an extruder It was designed to be weighed by tilting it.

Therefore, the above-mentioned SMC and BMC molding material production equipment are each expensive, and not only do these two equipments have to be installed, but the latter
When trying to manufacture BMC molding material using a dedicated BMC molding material manufacturing device, the glass chop w must be introduced in the middle of the mixer t as described above.
It is difficult to obtain a satisfactory product in which liquid resin compounds o, p and powder q are not sufficiently impregnated and uniformly mixed.

<<Problems to be Solved by the Invention>> In the method of manufacturing BMC molding material according to claim 1 of the present application, in the manufacturing method using the above-mentioned conventional manufacturing equipment exclusively for BMC molding material, sufficient amount of various predetermined raw materials is required. In view of the fact that it is not possible to obtain an impregnated state by kneading, the kneading means not only adopts the impregnation process using the lower conveyor belt for impregnation and the upper conveyor belt for impregnation in the manufacturing process of the SMC molding material, but also the above-mentioned method. As a preliminary step to the kneading process using the mixer, various raw materials to be mixed are allowed to fall, and at the stage of being supplied to the mixer by the falling motion, the various raw materials can be mixed uniformly, and the various raw materials are uniformly mixed. The purpose is to carry out kneading by means of the same mixer after the viscosity mixing to obtain the ideal product.

<Means for Solving the Problems> In Claim 1 of the present application, a mixed liquid resin compound of a predetermined A liquid resin compound and a B liquid resin compound, which are raw materials for manufacturing a BMC molding material, is combined with a lower conveyor belt for impregnation. A reinforcing fiber reinforcing agent is supplied onto the mixed liquid resin compound of either the upper or lower conveyor belt for impregnation, and this is supplied to the lower conveyor belt for impregnation and the above-mentioned impregnation conveyor belt. and the upper conveyor belt to obtain a rough impregnated product of the mixed liquid resin compound and reinforcing fiber reinforcing agent,
This is peeled off from the lower surface of the lower conveyor belt for impregnation and the upper conveyor belt for impregnation extending from the terminal end, and is dropped into a continuous kneading extruder for BMC.
The rough impregnated material is kneaded, then molded and cut into predetermined dimensions.
A method for manufacturing a BMC molding material is provided, and claim 2 provides a lower conveyor belt for impregnation, an upper conveyor belt for impregnation, which can freely draw in respective synthetic resin films from a lower feeder and an upper feeder, and the synthetic resin film. On top, there is a raw material liquid supply device for supplying a mixed resin compound of a predetermined A-liquid resin compound and a B-liquid resin compound, and on the synthetic resin film of either the upper or lower conveyor belt for impregnation, a reinforcing fiber reinforcement is provided. an impregnating gap path is formed between the terminal end side of the lower impregnating conveyor belt and the starting end side of the impregnating upper conveyor belt; Pull out and wind up both the synthetic resin films of the upper conveyor belt for impregnation.
A winder for SMC, a lower winder for BMC that separately pulls out and winds each synthetic resin film, and BMC.
an upper stage winder for impregnation, and a narrow passageway for rear stage impregnation with rolls interposed between the winder for SMC and the upper stage winder for BMC, and the upper stage conveyor belt for impregnation is connected to the lower stage conveyor for impregnation. A continuous kneading extruder for BMC capable of receiving debris from the lower surface of the extension extending from the end of the belt is installed below, and a molding machine is sequentially attached to this continuous kneading extruder for BMC. The present invention aims to provide a manufacturing device for both BMC and SMC molding materials, which is characterized by being equipped with a BMC cutting machine.

<<Function>> In the method for producing a BMC molding material according to claim 1, between the lower and upper conveyor belts for impregnation adopted in the production of SMC molding materials, the reinforcing fiber reinforcement is added to the reinforcing fiber reinforcement. Impregnation with the mixed liquid resin compound is first carried out to obtain a rough impregnated material, and the rough impregnated material is further peeled off from the extending lower surface of the upper conveyor belt for impregnation, and in the falling process, the entire material is well coated. It will be mixed,
After this process, the mixture is dropped and stored in a continuous kneading extruder for BMC, so a uniform mixture can be obtained by kneading in the extruder, and thus a satisfactory uniform BMC molding material can be obtained. Obtainable.

Next, when using the dual-purpose manufacturing apparatus of claim 2,
Whether you are trying to obtain BMC molding materials or manufacturing SMC molding materials, you will need a raw material liquid supply device, a lower and upper feeder for supplying synthetic resin film, and fiber reinforcement for reinforcement such as glass chops. A reinforcing agent supply device capable of supplying a reinforcing agent onto the synthetic resin film on either the upper or lower conveyor belt for impregnation, and a reinforcing agent supply device that is formed between the lower conveyor belt for impregnation and the upper conveyor belt for impregnation, An impregnating gap path in which a mixed resin compound is impregnated to form a rough impregnated material can be commonly used.

When manufacturing SMC molding materials, the synthetic resin films of the lower conveyor belt for impregnation and the upper conveyor belt for impregnation are pulled out and rolled up.
A winder for SMC and a gap path for impregnation with rolls placed in front of it are used as special components.
When manufacturing BMC molding materials, in place of the above-mentioned dedicated members, a lower winder for BMC, an upper winder for BMC, and a continuous winder for BMC that can receive debris from the extending lower surface of the upper conveyor belt for impregnation are installed. It is only necessary to operate the kneading extruder, molding machine, and BMC cutting machine as dedicated parts. Therefore, by arranging a considerable number of common parts, it is possible to provide extremely inexpensive equipment, and the production of SMC molding materials can also be performed using rolls. Satisfactory impregnation is achieved by adding a gap path for impregnation in the latter stage, and as a BMC molding material, the mixing action accompanying the falling of flakes is interposed in the earlier stage of the continuous kneading extruder for BMC, making it possible to achieve satisfactory impregnation compared to conventional BMC. This results in a product that is better than the molding material.

<<Example>> A manufacturing apparatus according to claim 2 which can carry out the manufacturing method according to claim 1 of the present application will be explained first with reference to the example shown in FIG.

By providing the lower conveyor belt 1 for impregnation and the upper conveyor belt 2 for impregnation disposed above the terminal end thereof, there is a gap between the terminal end side of the lower conveyor belt 1 for impregnation and the starting end side of the upper conveyor belt 2 for impregnation. , impregnation gap paths 3 are formed at equal distances, and therefore, an extending lower surface 2a extending from the terminal end of the impregnation lower conveyor belt 1 is formed on the terminal end side of the impregnation upper conveyor belt 2. In the illustrated example, a required number of impregnating rollers 2b are provided below the upper impregnating conveyor belt 2 and exerting roll pressure.

Furthermore, on the lower conveyor belt 1 for impregnation,
The synthetic resin film 4a is drawn in from the lower feeder 1a, and the synthetic resin film 4b from the upper feeder 2c is drawn onto the impregnating upper conveyor belt 2. These synthetic resin films 4
a and 4b can be pulled out along the upper and lower sides of the lower conveyor belt 1 for impregnation and the upper conveyor belt 2 for impregnation, respectively, or they can be pulled out as they are by operating the lower winder 1b for BMC and the upper winder 2d for BMC, respectively. It can also be rolled up.

As mentioned above, both synthetic resin films 4a,
4b in a parallel state, an SMC winder 5 is provided on the leading side to wind up both together, and the SMC winder 5 and the end of the impregnating upper conveyor belt 2 are provided. Between the sides, from the front stage side, a gap passage 6 for rear stage impregnation with rolls is installed.
A spacer roll 7 is provided to make the thickness of the SMC molding material uniform, and 6a and 6b indicate the rear impregnating rolls provided in the gap path 6 for impregnation with the rolls.

Next, the raw material liquid supply device 8 is an in-line mixer 8.
a, A liquid tank 8b, B liquid tank 8c and pump 8
d and 8e are connected by piping, and A liquid tank 8
8g of liquid A resin compound obtained by operating the motor 8f in tank b is transferred to the liquid B tank 8 by pump 8d.
The B liquid resin compound 8i obtained by operating the motor 8h in c is sent to the above-mentioned inline mixer 8a by a pump 8e, where the motor 8h is operated.
By operating the compound 8g and 8i, a mixed liquid resin compound 8k is obtained.

Here, as the synthetic resin films 4a and 4b, polyethylene film, polypropylene, polyvinyl alcohol film, etc. are used as is known, and as the A-liquid resin compound 8g, as is also known, non-containing film is used. B-liquid resin compound 8i contains saturated polyester resin, low-shrinkage additives, curing catalysts, fillers, colorants, internal mold release agents, etc. In contrast, liquid B resin compound 8i uses styrene and magnesium oxide as a thickener. In order to prevent precipitation of the monomer or magnesium oxide, a structure constructed using a solution in which styrene polymer is partially dissolved in styrene monomer can be used as a low shrinkage agent.

The mixed liquid resin compound 8k is
The synthetic resin film 4a of the lower conveyor belt 1 for impregnation and the upper conveyor belt 2 for impregnation, respectively.
4b, it can be supplied via a delivery pipe 81, and 8m and 8n in the figure are the respective conveyor belts 1,
This is a doctor knife disposed on the top of the liquid resin compound 8k, thereby making it possible to freely adjust the supply amount of the mixed liquid resin compound 8k.

In the figure, reference numeral 9 denotes a reinforcing agent feeding device, which feeds glass chops as reinforcing fiber reinforcing agent 9a onto the synthetic resin film 4a in the lower conveyor belt 1 for impregnation in the illustrated example, and is used to feed glass lobings 9b and glass cutters. 9c, but it may of course be supplied onto the synthetic resin film 4b.

Furthermore, in the case of this apparatus, a continuous kneading extruder 10 for BMC is temporarily installed below the extending lower surface 2a of the above-mentioned upper conveyor belt 2 for impregnation, with a required step difference. The rough impregnated material A peeled off from the extended lower surface 2a, which will be described later, is received by the kneading extruder 10 and kneaded there, and then
It is extruded by a molding machine 11 provided at the end thereof and cut into a predetermined size by a BMC cutting machine 12, so that a product, which is actually a BMC molding material 13 that is packaged, is obtained.

Here, 14 in the figure indicates a hopper for guiding the peeled material A to the continuous kneading extruder 10 for BMC;
c, 2e are the lower conveyor belt 1 for mating impregnation;
In order to remove the mixed liquid resin compound 8k and the reinforcing fiber reinforcing agent 9a attached to each synthetic resin film 4a, 4b of the upper stage conveyor belt 2 for impregnation,
A knife coater for removing compound adhesion made of neoprene rubber, Teflon plate material, etc. is shown, and is installed at the end of each of the conveyor belts 1 and 2. In Fig. 1, 15 is a packaging device;
a shows the packing sheet.

Therefore, the case where an SMC molding material is obtained using the above-mentioned apparatus will be explained below.

First, in the A liquid tank 8b, 85 parts of unsaturated polyester resin, 15 parts of a low shrinkage agent, 5 parts of zinc stearate as an internal mold release agent, and a coloring agent (paste pigment)
8 parts, 140 parts of calcium carbonate as a filler, 1 part of t-butyl perbenzoate as a curing catalyst.
In the B liquid tank 8c, 8 g of A liquid resin compound consisting of 10 parts of styrene monomer was prepared, and in the B liquid tank 8c, B liquid was mixed with 5 parts of styrene monomer, 1 part of magnesium oxide, and 6 parts of a low shrinkage agent/magnesium oxide sedimentation prevention agent. Resin compound 8i was obtained, and desired amounts of both compounds were added to inline mixer 8.
a and mix well to prepare 8k of mixed liquid resin compound, and transfer this to 8l of delivery pipe.
The solution was applied via doctor knives 8m and 8n onto the synthetic resin films 4a and 4b attached to the operating lower impregnation conveyor belt 1 and impregnation upper conveyor belt 2, respectively, to a coating width of about 1000 mm, and further The reinforcing agent supply device 9 feeds a glass chop, which is the reinforcing fiber reinforcing agent 9a, to a length of approximately 20 mm.
Adjust the amount and drop it onto the synthetic resin film 4a so that it is uniform.

Of course, at this time, the SMC winding machine 5 and the rear-stage impregnation gap passage 6 with rolls are also in operation, and the above-mentioned glass chop and mixed liquid resin compound 8k are distributed between the lower impregnation stage and the upper stage conveyor belts 1 and 2. The mixed liquid resin compound 8k enters the impregnation gap 3 formed between the glass chips and impregnates the glass chop with the roll pressure of the impregnating roller 2b, so that the coarse impregnated material A becomes the synthetic resin film 4a, 4.
Furthermore, by passing through the gap passage 6 for subsequent impregnation with rolls, the impregnating action here is sufficiently performed, and the defoaming action is also complete, and then the spacer By passing through the roll 7, the thickness of the product is adjusted,
The SMC molding material is wound up on the SMC winder 5, and is actually put into a 40° C. aging chamber and treated for 48 hours to form a final product.

Next, the BMC according to claim 1 using the same device as above.
To carry out the method for producing a molding material, the following steps are followed.

As well as manufacturing the SMC molding material mentioned above,
First, a mixed resin compound consisting of a predetermined A-liquid resin compound and a B-liquid resin compound is supplied to the lower conveyor belt 1 for impregnation and the upper conveyor belt 2 for impregnation, and the upper and lower conveyor belts 1 and 2 for impregnation are A reinforcing fiber reinforcing agent 9a is applied onto the mixed liquid resin compound (or both are acceptable), and the reinforcing fiber reinforcing agent 9a is introduced into the gap path 3 for impregnation formed by the lower conveyor belt 1 for impregnation and the upper conveyor belt 2 for impregnation. It is.

Of course, the following will be used as the A-liquid resin compound and the B-liquid resin compound here.

That is, the former compound contains 80 parts of unsaturated polyester resin, 20 parts of low shrinkage additive, 180 parts of aluminum hydroxide as filler, 5 parts of zinc stearate as internal mold release agent, and 8 parts of colorant (paste pigment). , consisting of 1 part of t-butyl perbenzoate and 10 parts of styrene monomer as a curing agent,
The latter compound contains styrene monomer 5
1 part of magnesium oxide, and 5 parts of a magnesium oxide sedimentation inhibitor that also serves as a low-shrinkage agent.

In addition, when manufacturing the BMC molding material, the coating width of the mixed liquid resin compound was approximately 400 mm, and 35 parts of a glass tip with a length of 13 mm was added.

The following process is different from the above-mentioned manufacturing procedure for SMC molding materials, and the operation status of the equipment is such that the SMC winder 5, the rear stage impregnation gap passage 6 with rolls, and the spacer roll 7 are stopped, and the BMC lower winder 1
By operating the upper winder 2d for BMC, the synthetic resin films 4a and 4b that are unwound from the lower unwinder 1a and the upper unwinder 2c are wound up.

By doing this, the rough impregnated material A obtained by the impregnation gap path 3 as described above has a large filler content in the mixed liquid resin compound 8k, unlike the case of the SMC molding material. Therefore, the viscosity of the rough impregnated material A is high, so that the rough impregnated material A, which has passed through the gap path 3 for impregnation without being in a sufficiently mixed state, is transferred to the lower extending surface 2a of the upper conveyor belt 2 for impregnation. It peels off into the hopper 14 due to its own weight, and also falls into the hopper 14 from the lower conveyor belt 1 for impregnation, and as it falls, mixing progresses, and it falls into the continuous kneading extruder 10 for BMC arranged below. Those that are collected but do not peel off due to their own weight as described above are peeled off by knife coaters 1c and 2e for removing compound adhesion.

In the subsequent steps, as in the case of the conventional dedicated equipment shown in Fig. 3, the fallen rough impregnated material A is
Kneaded by continuous kneading extruder 10 for 200mm
A continuous bar-shaped strip is sent to a stamping machine 11 having an opening of 100 mm x 100 mm, and is extruded into a constant shape onto a packaging film 15a of a packaging device 15, which is then cut by a BMC cutting machine 12. is,
As a result, BMC molding material 13 as a product is obtained.

<<Effects of the Invention>> When using the method for producing a BMC molding material according to claim 1 of the present application, a rough impregnated product of a mixed liquid resin compound and a reinforcing fiber reinforcement is introduced between the lower stage for impregnation and the upper stage conveyor belt, and After mixing during the dropping process, it is kneaded by a continuous kneading extruder for BMC, resulting in a high quality product with a uniform mixture of various raw materials.
BMC molding material can be obtained.

Furthermore, when using the manufacturing apparatus according to claim 2,
It is possible to selectively produce both SMC molding materials and BMC molding materials with one device, and since there are many components that can be used for the production of both molding materials, it is extremely inexpensive compared to conventional methods. In addition to making it possible to manufacture BMC molding materials of higher quality than conventional manufacturing equipment dedicated to BMC molding materials.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the overall configuration of a manufacturing apparatus according to claim 2 that can be used to carry out the method for manufacturing a BMC molding material according to claim 1 of the present application, and FIGS. 2 and 3 are each a conventional SMC , is a schematic diagram showing the overall configuration of a BMC molding material manufacturing apparatus. 1...lower conveyor belt for impregnation, 1a...lower feeder, 1b...lower winder for BMC, 2...
Upper conveyor belt for impregnation, 2a...extending lower surface,
2c...Upper stage feeder, 2d...Upper winder for BMC, 2e...Knife coater for compound adhesion removal, 3...Gap path for impregnation, 4a...Synthetic resin film, 4b...Synthetic resin film, 5... …SMC
Winding machine for use, 6... Gap path for rear stage impregnation with roll, 8
... Raw material liquid supply device, 8a ... In-line mixer, 8g ... A liquid resin compound, 8i ... B
Liquid resin compound, 8k...Mixed liquid resin compound, 9...Reinforcing agent supply device, 9a...Fiber reinforcing agent for reinforcement, 10...Continuous kneading extruder for BMC,
11...Stamping machine, 12...BMC cutting machine, A...
...Rough impregnation.

Claims (1)

[Claims] 1. Supplying a mixed liquid resin compound of a predetermined A-liquid resin compound and a B-liquid resin compound, which are raw materials for manufacturing a BMC molding material, to a lower conveyor belt for impregnation and an upper conveyor belt for impregnation,
Providing a reinforcing fiber reinforcing agent onto the mixed liquid resin compound of either the upper or lower conveyor belt for impregnation, and sending this between the lower conveyor belt for impregnation and the upper conveyor belt for impregnation, A rough impregnated product of the mixed liquid resin compound and the reinforcing fiber reinforcing agent is obtained, and this is peeled off from the lower surface of the upper conveyor belt for impregnation extending from the end of the lower conveyor belt for impregnation, and then continuously kneaded for BMC. 1. A method for producing a BMC molding material, characterized in that the rough impregnated material is introduced into an extruder, kneaded therein, and then molded and cut into predetermined dimensions. 2 A lower conveyor belt for impregnation, an upper conveyor belt for impregnation, which can freely draw in the respective synthetic resin films from the lower feeder and the upper feeder, and a predetermined liquid A resin compound and liquid B onto the synthetic resin film. A raw material liquid supplying device for supplying a mixed liquid resin compound of a resin compound, and a reinforcing agent supplying device for supplying a reinforcing fiber reinforcing agent onto the synthetic resin film of either the upper or lower conveyor belt for impregnation. , an impregnation gap path is formed between the terminal end side of the lower impregnation conveyor belt and the starting end side of the impregnation upper conveyor belt, and both synthetic resin films of the impregnation lower conveyor belt and the impregnation upper conveyor belt are formed. A winding machine for SMC that pulls out and winds up, a lower winding machine for BMC that pulls out and winds each synthetic resin film separately,
Upper winder for BMC and winder for SMC above
a narrow gap path for impregnation with a roll interposed between the upper winder for BMC, and the upper conveyor belt for impregnation is located below the extending lower surface extending from the terminal end of the lower conveyor belt for impregnation. is characterized in that a continuous kneading extruder for BMC capable of receiving flakes from the lower surface of the extension is installed, and a molding machine and a BMC cutting machine are successively installed in this continuous kneading extruder for BMC. BMC and SMC molding material manufacturing equipment.