JPH03164218A - In-mold molding method - Google Patents

Abstract

PURPOSE:To obtain a molded product to which homogenous and smooth in-mold coating is applied by a method wherein a flowable resin material is emitted to the surface of the molded product obtained in a cavity while vacuum suction is performed to cover the surface of the molded product. CONSTITUTION:The flowability of the urethane resin from a resin material emitting unit 10 is enhanced on the surface of a primary molded product 50' by the vacuum suction through the fine gap of the fitting part between the shearing edge part 3c of an upper mold 3 and the shearing edge part 2B of a lower mold 2. Further, the surface of the primary molded product 50' can be covered with the urethane resin in such a state that the penetration of air or that of the 'burr' from the shearing edge parts 2B, 3C is prevented. After the thin layer covering the whole surface of the primary molded product 50' is formed, the engaged state of the lower and upper molds 2, 3 is held for a predetermined period as it is to perfectly cure the urethane resin and the in-mold coating 51 with the urethane resin is formed to the surface of the primary molded product 50' to obtain a homogenous and smooth surface.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a molding method in which a resin molding material is pressure molded using a mold to form a shape, and an in-mold coating is applied to the surface of the resin molding material. This invention relates to an in-mold molding method for obtaining products.

(Prior art) By press-molding a resin material such as sheet molding compound (SMC) using a mold,
In order to obtain various molded products, pressure is applied to the resin-forming material in order to obtain molded products of high quality with no minute irregularities or pinholes formed on the surface. It has been proposed to apply an in-mold coating to the surface of a molded product obtained by molding. In order to obtain a molded product having a surface portion coated with in-mold coating,
For example, first, a resin molding material is placed between the lower mold and the upper mold in a pressure molding device composed of a lower mold and an upper mold, and the resin molding material is molded by moving the upper mold toward the lower mold. By pressure-molding the material, a molded product is obtained in the cavity formed between the upper mold and the lower mold, and then the molded product is formed in the cavity by slightly moving the upper mold in a direction away from the lower mold. A slit is provided between the surface of the mold and the inner surface of the cavity forming part in the upper mold, and a fluid resin material is injected into the slit so that the surface of the molded body within the cavity is covered with the fluid resin material. After this, a method is adopted in which the fluid resin material is cured to provide a surface coating layer of the resin material, that is, an in-mold coating, on the surface of the molded article.

Furthermore, for example, in Japanese Patent Application Laid-open No. 61-273921, after obtaining a molded product in a cavity formed between an upper mold and a lower mold, a fluid resin material is applied to the cavity under extremely high pressure. The surface of the crystal is coated with a flowable resin material, and the flowable resin material is then cured to form an in-mold coating on the surface of the molded product. Disclosed.

When in-mold coating is applied to the surface of a molded article as described above, polyester resin or urethane resin is selected as the fluid resin material used to form the in-mold coating.

(Problem to be Solved by the Invention) However, in providing the in-mold coating on the surface of the molded product obtained in the cavity formed between the upper mold and the lower mold as described above, A slit is provided between the surface of the molded product and the inner surface of a cavity-shaped part of the upper mold, and when a fluid resin material is injected into the slit, the surface of the molded product and the inner surface of the cavity forming part of the upper mold are Air enters the gap between the mold and the sheared edge of the lower mold or the upper mold, and this creates a smooth surface without pinholes. There is a risk that the shaping of the in-mold coating, which is supposed to have a In addition, air that has entered the gap between the surface of the molded product and the inner surface of the cavity forming part in the upper mold reduces the fluidity of the fluid resin material injected into the gap, resulting in a uniform There is also a possibility that it will not be possible to obtain a suitable in-mold coating.

In view of the above, the present invention provides a method for obtaining a molded product in a cavity formed inside the pressure molding device by pressurizing and shaping a resin molding material using a pressure molding device, Thereafter, an in-mold coating formed by curing the fluid resin material is provided on the surface of the molded product in the cavity, thereby obtaining a molded product having a surface portion coated with the in-mold coating. In this process, the resulting molded product is made homogeneous and smooth without any appearance of pinholes, etc. by preventing the contamination of "burrs" etc. from the air or the shearing section of the pressure molding machine. It is an object of the present invention to provide an in-mold molding method that allows a product to be coated with an in-mold coating having a surface.

(Means for Solving the Problems) In order to achieve the above object, the in-mold molding method according to the present invention includes a first mold and a second mold movable with respect to the first mold. By moving the second molding die and pressurizing the resin molding material placed between the mold and the mold,
A molded product is obtained in the cavity formed between the first mold and the second mold, and then, while vacuum suction is applied to the inside of the cavity, the surface of the molded product placed in the cavity is The fluid resin material is discharged, the fluid resin material is cured, and in-mold coating is applied to at least a portion of the surface of the molded product.

(Function) In such an in-mold molding method according to the present invention, after a molded product is obtained in the cavity formed between the first mold and the second mold, the pressure inside the cavity is reduced. While performing suction, a fluid resin material is discharged onto the surface of the molded product placed in the cavity, so that at least a portion of the surface of the molded product is covered with the fluid resin material. Vacuum suction for
For example, the cavity is formed through a shearing edge in the first mold or the second mold, coupled to a vacuum pump. As a result, when the fluid resin material is discharged onto the surface of the molded product placed in the cavity and at least a portion of the surface of the molded product is covered with the fluid resin material, the surface side of the molded product is This prevents air and "burrs" from entering from the sheared edges of the first mold or the second mold, and improves the fluidity of the fluid resin material on the surface of the molded product. As a result, the incorporation of "burrs" etc. from air or the sheared edge part of the first mold or the second mold is prevented, and the mold is homogeneous without pinholes etc. A molded article is obtained which has a surface portion with an in-mold coating which is supposed to have a smooth surface.

(Example) Hereinafter, the process of obtaining a molded product having a surface portion coated with an in-mold coating according to an example of the in-mold molding method according to the present invention will be described, and the pressure molding equipment used to carry out the example will be described. This includes an explanation of the following.

FIG. 1 shows an example of a pressure mold apparatus used to carry out an example of the in-mold molding method according to the present invention. This example of a pressure molding device is configured to include a lower mold 2 that is fixed and an upper mold 3 that is movable relative to the lower mold 2. The lower mold 2 has a base portion 4A and a cavity forming portion 4B that projects upward from the base portion 4A.
A ceiling member 5 is attached to the side surface of the base portion 4A, and is arranged to surround the base portion 4A. Further, the upper mold 3 is supported by a cylinder rod 6 in a pressurizing cylinder constituting a drive section and is moved up and down, and is fitted into the cavity shaped portion 4B of the lower mold 2 from above. The cavity forming part 7A, which is made of
A contact detector is provided on the inner surface of the cylindrical portion 7B to detect the sealing rubber member 5 by coming into contact with the sealing rubber member 5 attached to the side surface of the base portion 4A of the lower mold 2. 8 are buried.

Then, the upper surface portion 2A of the cavity-shaped portion 4B in the lower mold 2 and the lower surface portion 3 of the cavity-shaped portion 7A in the upper mold 3.
A and A respectively have a surface shape corresponding to the outer shape of the molded product to be obtained, and are opposed to each other in the vertical direction, and a state in which the cavity forming part 7A fits into the cavity shape or part 4B. under the upper surface part 2 of the cavity forming part 4B.
A cavity 9 is formed between A and the lower surface portion 3A of the cavity forming portion 7A. Further, the two upper surfaces of the cavity forming portion 4B in the lower mold 2 are formed with shearing edge portions 2B at their outer peripheral edge portions, and furthermore, the two upper surfaces of the cavity forming portion 4B in the upper mold 3 are formed with a shearing edge portion 2B. shape part 7
The step portion 3B following A forms a shearing edge portion 3C at its inner peripheral edge portion. A resin material discharging unit 10 equipped with a movable shirt-off rod 10a that is movable in the vertical direction is provided in the cavity-shaped portion 7A of the upper mold 3. thermosetting fluid resin material,
For example, a resin material delivery device (P
P) 12 are connected through a resin passage 13. The resin material discharge unit 10 has a nozzle 1 that opens into the cavity 9 at the lower surface 3A of the cavity-shaped portion 7A.
is arranged, one end of the resin passage 13 is connected to this nozzle (1), and the supply state and supply cut-off state of the urethane resin from the resin passage 13 to the nozzle 11 can be selectively controlled by the movable shirt off rod 10a. It is made to be taken for granted.

On the other hand, in the cavity forming part 4B of the lower mold 2, a plurality of air supply/discharge units 15 (only one is shown in the figure) are provided. Inside the air supply/discharge unit 15, there is a pressure chamber l6 that operates a movable shutoff rod l9 that can move in the vertical direction, and one end that opens into the cavity 9 at the upper surface 2A of the cavity forming part 4B. At the same time, the other end opens to the upper part of the pressure chamber 16, and a passage 17 in which a movable shirt off rod 19 is moved is disposed, and one end opens to the upper part of the pressure chamber 16.
A passage 18A opens at the lower surface of the air supply/discharge unit 15 at the other end, and a pressure chamber l6 at one end.
The air supply/discharge unit 1 opens at the top and the other end
5, and a passage 18C that opens at one end at the bottom of the pressure chamber l6 and at the other end at the bottom of the air supply unit l5.

A decompression passage 20 and air passages 21, 22 and 23 are formed in the base portion 4A of the lower mold 2. The decompression passage 20 forms a plurality of branch passage parts, and the cavity forming part 7A in the upper mold 3 is connected through the branch passage parts.
The base portion 4A is opposite to the lower surface portion of the stepped portion 3B provided in the
It opens at the upper surface of the air supply valve 30 and is connected to the passage 18A in the air supply/discharge unit 15 via the on-off valve 30. Further, the depressurization passage 20 is connected to a vacuum pump (VP) 25 outside the base portion 4A through a depressurization passage 24 provided with an on-off valve 3l. The air passage 21 opens through the on-off valve 32 to a portion between the on-off valve 30 and the air supply/discharge unit 15 in the branch passage section of the decompression passage 20 in which the on-off valve 30 is provided, and Outside the base portion 4A, the air passage 2
6 to an air delivery pump (AP) 27. The air passage 22 is connected to the passage 18C in the air supply unit 15, and is also connected to the air delivery pump 27 through an air passage 28 provided with an on-off valve 33 outside the base portion 4A. Furthermore, the air passage 23 has an air supply channel. Passage 18B in knit l5
It is also connected to the air delivery pump 27 through an air passage 29 provided with an on-off valve 34 outside the base portion 4A.

The above-mentioned resin material discharging unit to, resin material discharging device 1
2. The vacuum pump 25, the air delivery bomb 27, and the on-off valves 30 to 34 are each controlled in operation by a control unit 35.

The control unit 35 controls the lower mold 2 obtained from the contact detector 8.
A detection output signal Sa representing the holding state of the upper mold 3 with respect to
, and drive signals Co and C to the on-off valves 30 to 34 based on a position detection output signal Sp representing the position of the upper die 3 obtained from a drive unit for the upper die 3 (not shown).
selectively supplying I, C2, C3 and C4, respectively, and
Drive signals Ca, Cb, and Cc are selectively supplied to the resin material delivery device 12, vacuum pump 25, and air delivery pump 27, respectively, and furthermore, a drive signal Cd is selectively supplied to the resin material discharge unit 10.

Although not shown, the cavity forming part 4B in the lower mold 2 and the cavity forming part 7 in the upper mold 3
A is provided with heating means for heating the cavity 9.

In implementing an example of the in-mold molding method according to the present invention using such a pressure molding mold apparatus and obtaining a molded product having a surface portion coated with an in-mold coating,
First, as shown in FIG. 2, the upper mold 3 is placed in a raised position and is separated from the lower mold 2, and the vacuum pump 25 and the air delivery pump 27 are respectively driven by the control unit 35. The signals cb and Cc are supplied to take the operating state, and the resin material delivery device 1
2 is not supplied with the drive signal Ca from the control unit 35 and is in an inoperative state, and furthermore, the resin material discharging unit 10 is not supplied with the drive signal Cd from the control unit 35, so that the movable shunt off-road 10
It is assumed that a is placed at a position that blocks the supply of urethane resin from the resin passage 13 to the nozzle 11. At this time, the on-off valves 30, 31, 32, and 34 are controlled by drive signals CO, CI, and C2 from the control unit 35, respectively.
and C4 are not supplied and are kept in the closed state, and the on-off valve 33 is supplied with the drive signal C3 from the control unit 35 and kept in the open state, so that the air supply unit l5 In the pressure chamber 16 at
Air from the air delivery pump 27 flows through the air passages 28 and 22.
The passages 17 and 18A are closed by the movable shirt-off rod 19 so that the movable shirt-off rod 19 assumes the upper position. Under such conditions, the cavity forming portion 4B in the lower mold 2
A sheet molding compound (SMC) 50 of the resin molding material fL is placed on the upper surface portion 2A,
The SMC 50 is placed between the upper surface portion 2A of the cavity-shaped portion 4B in the lower mold 2 and the lower surface portion 3A of the cavity forming portion 7A in the upper mold 3.

Next, the cavity-shaped part 4B in the lower mold 2 and the upper mold 3
The heating means provided in the cavity forming part 7A is activated to heat the SMC 50 placed on the upper surface part 2A of the cavity forming part 4B in the lower mold 2, and the driving part for the upper mold 3 is activated. The upper mold 3 is lowered by operating the pressurizing cylinder that constitutes the upper mold 3. Then, the upper mold 3 is lowered, and as shown in FIG. When the contact detector 8 embedded in the part contacts the ceiling member 5 attached to the base part 4A, the contact detector 8 indicates that the upper mold 3 is connected to the lower mold 2.
A detection output signal S indicating that the
a is supplied to the control unit 35. Control unit 3
5 sends a drive signal CI to the on-off valve 3l when the detection output signal Sa from the contact detector 8 is supplied, and the on-off valve 31
Open. As a result, a branch passage portion opens at the upper surface of the base portion 4A in the decompression passage 20, and
The pressure in the space formed between the lower mold 2 and the upper mold 3 is reduced through the pressure reduction passage 24 until the pressure in the space reaches, for example, 260 to 160 mmllg.

During this time, the upper mold 3 is continuously lowered, and the cavity forming part 7A of the upper mold 3 fits into the cavity forming part 4B of the lower mold 2, so that the upper surface part 2 of the cavity forming part 4B
The cavity 9 is formed between A and the lower surface part 3A of the cavity forming part 7A, and then the upper mold 3
is lowered to apply pressure to the SMC 50 placed on the upper surface 2A of the cavity forming part 4B, and to harden the pressure molded SMC 50 to form the upper surface 2 of the cavity forming part 4B. A primary molded product of 50° is obtained in the cavity 9 formed between the person and the cavity-shaped portion 7A and the lower surface portion 3A.

After obtaining the primary molded product 50' in the cavity 9 in this way, as shown in FIG.
In order to form a narrow gap between the surface of the next molded product 50° and the lower surface portion 3A of the cavity forming portion 7A of the upper mold 3, the pressurizing cylinder is caused to slightly raise the upper mold 3. In this case, the upper mold 3 is used to form the primary molded product 50' in the cavity 9.
When the upper die 3 starts to rise to form a narrow gap between the surface of the upper mold 3 and the lower surface 3A of the cavity forming part 7A, a position detection output signal sp representing this is supplied to the control unit 35.

The control unit 35 supplied with the position detection output signal Sp supplies drive signals CO and C4 to the on-off valves 30 and 34, respectively, to open the on-off valves 30 and 34, and
The supply of the drive signal C3 to the on-off valve 33 is stopped, the on-off valve 33 is closed, and the air passage 22 side thereof is opened to the atmosphere. Continue vacuum suction operation.

As a result, air from the air delivery bomb 27 is supplied through the air passages 29 and 23 into the pressure chamber 16 in the air supply unit 15 provided in the cavity-shaped hole 4B of the lower mold 2, and the movable shirt off rod 19 assumes the lower position, and the passages 17 and 18A are opened, whereby the passage 17 facing the lower surface of the primary molded product 50' disposed in the cavity 9 becomes the passage 18A and the vacuum passage. The pressure is reduced through 20 and 24, and the primary molded product 5
0'' is the upper surface part 2 of the cavity forming part 4B in the lower mold 2
The primary molded product 5 in the cavity 9 is sucked by A.
A slit is formed between the surface of 0゛ and the lower surface portion 3A of the cavity forming portion 7A in the upper mold 3.

At the same time, the control unit 35 supplies drive signals Cd and Ca to the resin material discharging unit 10 and the resin material discharging device l2, respectively, and
is caused to perform an operation of delivering the urethane resin, and the movable shirt off rod 10a in the resin material discharging unit IO is made to take a raised position so that the urethane resin is supplied from the resin passage 13 to the nozzle l1. As a result, a space is formed between the stepped portion 3B provided in the cavity-shaped portion 7A of the upper mold 3 and the base portion 4A of the lower mold 2 facing the stepped portion 3B in the cavity 9, and Upper mold 3 for communicating space and cavity 9
Through a minute gap formed at the fitting part between the cavity-shaped part 4B in the lower mold 2 and the cavity forming part 7A in the upper mold 3 between the shearing edge part 3C and the shearing edge part 2B in the lower mold 2. Under reduced pressure suction, the urethane resin sent out from the resin material delivery device 12 passes through the resin passage 13 and the resin material delivery unit 10, and is connected to the surface of the primary molded product 50' placed in the cavity 9. A state is obtained in which the liquid is discharged into the gap formed between the cavity forming part 7A and the lower surface part 3A in the upper mold 3.

After the urethane resin is discharged from the resin material discharge unit 10 onto the surface of the primary molded product 50'' placed in the cavity 9 as described above, the control unit 35
However, the resin material discharging unit 10 and the resin material discharging device I
2, the movable shirt off rod 10a in the resin material discharging unit 10 takes a lowered position that cuts off the supply of urethane resin from the resin passage l3 to the nozzle 11, and The material delivery device l2 is made to stop delivering the urethane resin.

Subsequently, the pressure cylinder is operated again to lower the upper mold 3 as shown in FIG.
Resin material discharging unit I-1 is inserted into the gap formed between A and A.
The urethane resin discharged from 0 forms a thin layer that completely covers the surface of the primary shaped product 50'. At this time, when the upper mold 3 starts to descend, a position detection output signal SP representing this is supplied to the control unit 35.

Then, the control unit 35 to which the position detection output signal Sp has been supplied stops sending out the drive signal CO to the on-off valve 30 to bring the on-off valve 30 into the closed state.
Stop sending out the drive signal C4 to the on-off valve 34, close the on-off valve 34, open the air passage 18B side to the atmosphere, and send the drive signal C3 to the on-off valve 33 to open the on-off valve 33. Make it.

Thereby, in the pressure chamber l6 in the air supply unit 15 provided in the cavity-shaped part 4B of the lower mold 2,
Air from the air delivery pump 27 flows through the air passages 28 and 22.
The movable shirt off rod 19 assumes an upper position which closes the passages 17 and 18A. In addition, also in this case, the space formed between the step part 3B provided in the cavity-shaped part 7A of the upper mold 3 and the base part 4A of the lower mold 2 facing therewithin the cavity 9. , and a lower mold 2 between the shearing edge portion 3C of the upper mold 3 and the shearing edge portion 2B of the lower mold 2, which communicates this space with the cavity 9.
The vacuum suction through the minute gap formed at the fitting portion between the cavity forming section 4B and the cavity forming section 7A of the upper mold 3 continues through the vacuum passages 20 and 24.

In this way, the primary formed crystal 50 arranged inside the cavity 9
Discharging the urethane resin from the resin material discharging unit 10 into the gap formed between the surface of ゛ and the lower surface portion 3A of the cavity-shaped portion 7A in the upper die 3, and then discharging the urethane resin from the resin material discharging unit 10. The shape of the thin layer that entirely covers the surface of the primary molded product 50'' made of the discharged urethane resin forms the cutting edge portion 3C of the upper die 3 and the shearing edge portion 2B of the lower die 2 with respect to the inside of the cavity 9. By making it so that vacuum suction is carried out through a fine gap formed at the fitting part between the cavity-shaped part 4B in the lower mold 2 and the cavity-forming part 7A in the upper mold 3. , the fluidity of the urethane resin discharged from the resin material discharge unit IO is improved on the surface of the L-formed product 50', and "burrs etc." from air and the shearing engine parts 2B and 3C are prevented from entering. The surface of the primary molded product 50'' can be covered with a state in which this is prevented. After lowering the upper mold 3 to form a thin layer of the urethane resin discharged from the resin material discharging unit 10 to completely cover the surface of the primary molded product 50, the lower mold 2
The engagement state of the upper mold 3 is maintained for a predetermined period of time, and the urethane resin placed on the surfaces of the primary molded products 50" and 50' in the cavity 9 is completely cured, and the primary molding is completed. An in-mold coating 51 made of urethane resin is formed on the surface of the product 50''. Thereby,
A molded product having a surface portion coated with an in-mold coating 5l of urethane resin is obtained, and the in-mold coating 51 prevents contamination by air or “burrs” from the sheared edge portions 2B and 3C. It has a homogeneous and smooth surface without peeling or forming holes or the like.

After the molded product having the surface portion coated with the in-mold coating 51 is obtained, the heating means provided in the cavity-shaped portion 4B of the lower mold 2 and the cavity-forming portion 7A of the upper mold 3 are inactivated. At the same time, the pressurizing cylinder is actuated to raise the upper mold 3, and as shown in FIG. 6, the upper mold 3 is brought to a raised position in which it is disengaged from the lower mold 2. At this time, when the contact detector 8 embedded in the inner surface of the cylindrical part 7B of the upper mold 3 comes into contact with the sealing rubber member 5 attached to the base part 4A of the lower mold 2, contact is detected. A detection output signal S from the device 8 indicates that the engagement of the upper mold 3 with the lower mold 2 is released.
a is supplied to the control unit 35. Control unit 3
5, when the detection output signal Sa from the contact detector 8 is supplied when the 12 type 3 is raised, stops sending out the drive signal Cl to the on-off valve 3l to close the on-off valve 3l, and Stop sending the drive signal C3 to the valve 33,
The on-off valve 33 is closed to open the air passage 18C side to the atmosphere, and drive signals C2 and C4 are supplied to the on-off valves 32 and 34 to open the on-off valves 32 and 34.

As a result, the vacuum suction to the space formed between the lower mold 2 and the upper mold 3 is stopped, and the air supply/discharge unit 1 provided in the cavity forming part 4B of the lower mold 2 is stopped.
Air from an air delivery pump 27 is supplied into the pressure chamber 16 in the pressure chamber 5 through two air passages and 23, and one movable shut-off rod is assumed to be in a downward position, so that the passages 17 and 18A are in an open state. Therefore, the lower mold 2
In-mold coating 5i1if! disposed on top surface portion 2A of cavity forming portion 4B in ! Air from the air delivery pump 27 is supplied through the air passages 26 and 21 and the passage 18A to the passage 17 which is in contact with the lower surface of the molded product having the curved surface part, and the surface part on which the in-mold coating 51 has been applied is supplied. The molded product having the molded product is peeled off from the upper surface portion 2A of the cavity forming portion 4B in the lower mold 2, so that the molded product can be easily taken out.

In the above-described example of the in-mold molding method according to the present invention, the urethane resin discharged from the resin material discharging unit 1-10 onto the surface of the primary molded product 50' The urethane resin discharged from the resin material discharging unit 0 to the surface of the first molded product 50° is applied to the surface of the first molded product 50°. A thin layer may be formed which partially covers the surface of the molded article, in which case a molded article having a partially coated surface is obtained.

(Effects of the Invention) As is clear from the above explanation, according to the in-mold molding method according to the present invention, by pressure-molding a resin molding material using a pressure-molding molding device, A molded product is obtained in a cavity formed inside the device, and then an in-mold coating formed by curing and applying a flowable resin material is provided on the surface of the molded product in the cavity. To obtain a molded product with a coated surface, after the molded product is placed in the cavity, vacuum suction is applied to the inside of the cavity, and the surface of the molded product placed in the cavity is The flowable resin material is discharged by the molded product so that at least a part of the surface of the molded product is covered with the flowable resin material, so that at least a part of the surface of the molded product placed in the cavity is covered with the flowable resin material. When molded, it is possible to prevent air and burrs from entering the surface of the molded product from the shearing edges of the pressurizing molding device, and to prevent the flowable resin material on the surface of the molded product. As a result, the incorporation of "burrs" etc. from the air or the sheared edge part of the pressure molding machine is prevented, and the molding material is homogeneous and free of pinholes etc. It is possible to obtain a molded article having a surface portion that is coated with an in-mold coating and has a smooth surface.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a pressure molding mold apparatus used for carrying out an example of the in-mold molding method according to the present invention;
FIGS. 2 to 6 are diagrams for explaining each step in an example of the in-mold molding method according to the present invention. In the figure, 2 is the lower mold, 3 is the upper mold, 4A is the base, 4B and 7
A is a cavity-shaped part, 7B is a cylindrical part, 9 is a cavity, 10 is a resin material discharging unit 1-, 12 is a resin material delivery device, 15 is an air supply unit 1-, 20 and 24 are pressure reducing passages, 2l ~23, 26, 28 and 29 are air passages, 2
5 is a vacuum pump, 27 is an air delivery pump, 30 to 34 are on-off valves, 35 is a control unit, 50 is an SMC, 50 is a primary molded product, and 51 is an in-mold coating. Figure 2 Figure 3 Figure 10: Resin #feeding = unit Figure 2

Claims (1)

[Scope of Claims] A resin molding material placed between a first mold and a second mold movable with respect to the first mold is a step of obtaining a molded product in a cavity formed between the first mold and the second mold by moving and pressure molding; A fluid resin material is discharged onto the surface of the molded product placed in the cavity while vacuum suction is applied to the cavity, and the fluid resin material is cured to form at least a portion of the surface of the molded product. An in-mold molding method characterized by comprising: a step of applying an in-mold coating;