JP2018043367A - Molding device and molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding device and a molding method capable of shortening cycle time.SOLUTION: A device has a first seal member 21, a second seal member 22, a rib 31, an intake air flow passage 301 and a vacuum device, the second seal member 22 and the rib 31 get into a contact from a state that a lower die 20 and an upper die 30 open, the intake air flow passage 301 is released from the second seal member 22, a second state that the first seal member 21 and the upper mold 30 get into a contact is arranged through a first state that the first seal member 21 and the upper mold 30 are separated.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a molding apparatus and a molding method.

  There is known an RTM (Resin Transfer Molding) method in which a preform formed from a fiber reinforced base material is disposed in a cavity of a mold, and a resin is injected into the cavity from a plurality of injection ports to impregnate the preform. (For example, refer to Patent Document 1). In this RTM method, vacuum molding may be performed in which a resin is injected into a cavity whose pressure has been reduced in advance.

International Publication No. 2013/125641

  When vacuum forming is performed by the RTM method, there is a problem that the cycle time becomes long because decompression in the cavity cannot be started unless the upper and lower molds are closed and the cavity is sealed. .

  The problem to be solved by the present invention is to provide a molding apparatus and a molding method capable of reducing the cycle time.

  In the present invention, the first seal member is provided in the first molding die so as to surround the molding space, the second seal member is enclosed in one of the first molding die and the second molding die, Provided so that the protruding height from the parting line is higher than that of one seal member, and the contact portion is provided in an annular shape on the other of the first mold and the second mold so as to face the second seal member; An intake passage is provided in the other of the first mold and the second mold so as to open on the inner peripheral side of the abutting portion, and a vacuum device for evacuating through the intake passage is provided to contact the second seal member. The first sealing member and the first sealing member through the first state in which the contact portion is in contact with each other, the intake flow path is opened by the second sealing member, and the first sealing member and the second mold are separated from each other. The first mold and the second mold so that the second mold comes into contact with the second mold. By shifting to the closed state from the opened the door, to solve the above problems.

  ADVANTAGE OF THE INVENTION According to this invention, the shaping | molding apparatus and shaping | molding method which can shorten cycle time can be provided.

It is a front view which shows the shaping | molding apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of FIG. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of FIG. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of FIG. It is a longitudinal cross-sectional view which expands and shows a part of FIG. It is a top view which shows the upper surface of the lower mold | type of FIG. It is a bottom view which shows the lower surface of the upper mold | type of FIG. It is process drawing of the shaping | molding method which shape | molds the molded article of FRP with the wet press construction method using the shaping | molding apparatus of FIG. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of the shaping | molding apparatus which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of the shaping | molding apparatus which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of the shaping | molding apparatus which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of the shaping | molding apparatus which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows the lower mold | type and upper mold | type of the shaping | molding apparatus which concerns on other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a molding apparatus 10 according to an embodiment of the present invention. The molding apparatus 10 shown in this figure corresponds to the molding of fiber reinforced plastics (FRP), and further, a method of injecting (applying) the resin to the fibers outside the mold (hereinafter referred to as wet press (wet press)). ) Method).

  The molding apparatus 10 includes a bolster 11, a slide 12, a molding die temperature control device 13, a vacuum device 14, a lower die 20, and an upper die 30. The slide 12 is provided above the bolster 11 so as to be movable up and down, and is moved up and down by a lifting device (not shown). The lower mold 20 is fixed to the upper surface of the bolster 11, and the upper mold 30 is fixed to the lower surface of the slide 12, and the lower mold 20 and the upper mold 30 are closed from the open state by the lowering of the slide 12. Become.

  The mold temperature control device 13 includes oil supply pipes 131 and 132, and a pump and a heater (not shown). The lower mold 20 and the upper mold 30 are formed with an oil flow path, the oil supply pipe 131 is connected to the oil flow path of the lower mold 20, and the oil supply pipe 132 is connected to the oil flow path of the upper mold 30. ing. The mold temperature control device 13 supplies oil as a heating medium to the oil passages of the lower mold 20 and the upper mold 30 through the oil supply pipes 131 and 132 and adjusts the temperatures of the lower mold 20 and the upper mold 30.

  The vacuum device 14 includes a pipe 141 and a vacuum pump 142. The pipe 141 connects the intake passage 301 (see FIG. 2 and the like) formed in the upper mold 30 and the vacuum pump 142. The vacuum pump 142 evacuates the first cavity C1 (see FIG. 4) through the pipe 141 and the intake passage 301.

  2 to 4 are longitudinal sectional views showing the lower mold 20 and the upper mold 30, FIG. 5 is a longitudinal sectional view showing a part of FIG. 2 in an enlarged manner, and FIG. FIG. 7 is a plan view showing the upper surface, and FIG. 7 is a bottom view showing the lower surface of the upper mold 30. As shown in FIGS. 2 to 4, the lower mold 20 is a female mold (cavity), and the upper mold 30 is a male mold (core). As shown in FIGS. 2 and 6, the fiber F into which the resin is injected is placed on the upper surface of the lower mold 20 in a state of following the uneven shape of the upper surface of the lower mold 20. In the following description, the center of the lower mold 20 and the upper mold 30 is referred to as a mold center, and the outer periphery of the lower mold 20 and the upper mold 30 is referred to as a mold outer periphery.

  An annular first seal member 21 is provided on the upper surface of the lower mold 20 so as to surround the fibers F. The first seal member 21 is made of a rubber material such as silicon rubber, fluorine rubber, butyl rubber, or ethylene propylene rubber. Whereas the cross-sectional shape of the first seal member 21 is elliptical, an arc-shaped groove 201 is formed on the upper surface of the lower mold 20 so as to surround the fiber F, and the bottom of the first seal member 21 The side portions are bonded in a state of being fitted into the grooves 201.

  Here, as shown in FIG. 4, the first cavity surrounded by the upper surface of the lower mold 20, the lower surface of the upper mold 30, and the first seal member 21 in a state where the lower mold 20 and the upper mold 30 are closed. Part C1 is formed. When the fiber F is disposed in the first cavity C1, the fiber F is pressed by the upper surface of the lower mold 20 and the lower surface of the upper mold 30. At this time, the first seal member 21 seals the outer periphery of the first cavity C1 in a compressed state.

  As shown in FIGS. 2 and 6, an annular second seal member 22 is provided on the upper surface of the lower mold 20 so as to surround the first seal member 21. The second seal member 22 is formed of a rubber material such as silicon rubber, fluorine rubber, butyl rubber, or ethylene propylene rubber. Whereas the cross-sectional shape of the second seal member 22 is elliptical, an arc-shaped groove 202 is formed on the upper surface of the lower mold 20 so as to surround the first seal member 21. The bottom portion of 22 is bonded in a state where it is fitted in the groove 202.

  The second seal member 22 can be a solid structure or a hollow structure. For example, when the second seal member 22 is formed of a rubber material having excellent impact resilience such as ethylene propylene rubber, the second seal member 22 can have a solid structure. On the other hand, when the second seal member 22 is formed of a rubber material such as butyl rubber which is inferior in impact resilience compared to ethylene propylene rubber, the second seal member 22 has a hollow structure and has a filler such as oil inside. It is preferable to fill with air or the like. Even when the second seal member 22 is formed of a rubber material having excellent resilience, the second seal member 22 may have a hollow structure. Moreover, when making the 2nd seal member 22 into a hollow structure, it is not essential to fill a filler, air, etc. inside.

  Here, as shown in FIG. 5, the first seal member 21 and the second seal member 22 protrude upward from the same height of the upper surface of the lower mold 20, and the parting line (the lower mold 20 and the upper mold 20 A height H2 (for example, 10 to 15 mm) from the partitioning surface 203 to the upper end of the second seal member 22 is a height H1 from the parting line 203 to the upper end of the first seal member 21 (for example, 3-5 mm). In other words, when the first seal member 21 and the second seal member 22 are provided on the upper surface of the lower mold 20, the upper mold 30 is parted when the upper mold 30 is lowered with respect to the lower mold 20. When the surface including the line first contacts the second seal member 22 and then the upper mold 30 is further lowered, the surface including the parting line of the upper mold 30 contacts the first seal member 21.

  As shown in FIG. 2, the upper mold 30 is formed with a plurality of intake passages 301. Each intake passage 301 is a through-hole penetrating the upper mold 30 in the vertical direction, and is disposed at a position overlapping the second seal member 22 in plan view. A pipe 141 is connected to the upper opening of the intake passage 301. In addition, two or more intake flow paths 301 are provided, and at least two intake flow paths 301 are spaced apart so as to sandwich the first cavity C1 on the left and right.

  As shown in FIGS. 2 and 7, an annular rib 31 is formed on the lower surface of the upper mold 30 so as to surround the first cavity C1. The rib 31 is disposed at a position overlapping the second seal member 22 in plan view. Each intake passage 301 is disposed at a position closer to the outer periphery of the mold than the first seal member 21 and closer to the center of the mold than the ribs 31. Here, a lower end (hereinafter referred to as an intake port) 301A of the intake passage 301 is arranged closer to the center of the mold than the center of the second seal member 22 in the width direction, whereas the rib 31 The seal member 22 is disposed closer to the outer periphery of the mold than the center in the width direction.

  As shown in FIGS. 2 to 4, the rib 31 is a protrusion that protrudes downward from the lower surface of the upper mold 30. On the other hand, the inlet 301 </ b> A is disposed on the lower surface of the upper mold 30. That is, the tip (lower end) of the rib 31 is disposed at a lower position than the lower surface of the upper mold 30 and the intake port 301A. Therefore, as shown in FIG. 3, when the upper mold 30 is lowered, first, the tip of the rib 31 and the second seal member 22 come into contact with each other. Here, the second cavity surrounded by the upper surface of the lower mold 20, the lower surface of the upper mold 30, the second seal member 22, and the rib 31 when the tip of the rib 31 and the second seal member 22 abut. Part C2 is formed. When the upper die 30 is further lowered, as shown in FIG. 4, the lower surface of the upper die 30 and the first seal member 21 are brought into contact with each other to form the first cavity C <b> 1. Pressurization (clamping) is performed by the lower surface and the upper surface of the lower mold 20.

  Here, the vacuum apparatus 14 is operated before the lowering of the upper mold 30 is started. Therefore, as shown in FIG. 3, the vacuum device 14 evacuates the second cavity C2 in a state where the tip of the rib 31 is in contact with the second seal member 22 and the intake port 301A is opened. Is done. Thereafter, as shown in FIG. 4, the air inlet 301 </ b> A is closed by the second seal member 22, but the vacuum state of the second cavity C <b> 2 is maintained.

  As shown in FIGS. 3 and 4, the rib 31 contacts the position closer to the outer periphery of the mold than the center of the second seal member 22 in the width direction and deforms the second seal member 22. Accordingly, the second seal member 22 is reduced in thickness and deformed so as to spread toward the center side of the mold, that is, the first seal member 21 side. The second seal member 22 spreading toward the first seal member 21 abuts on the first seal member 21. Thereby, there is no gap between the first seal member 21 and the second seal member 22, and the second seal member 22 fills the space between the lower mold 20, the upper mold 30, the first seal member 21, and the rib 31. It becomes a state.

  As shown in FIG. 4, when the second seal member 22 is further reduced in thickness from the state shown in FIG. 3 by the ribs 31, the upper die 30 and the first seal member 21 are allowed to come into contact with each other. The first cavity C <b> 1 is formed by the upper mold 30, the first mold 30, and the first seal member 21. Here, even after the first cavity C1 is formed, the state where the second seal member 22 fills the space between the lower mold 20, the upper mold 30, the first seal member 21, and the rib 31 is maintained.

  FIG. 8 is a process diagram of a molding method for molding a molded product of FRP by a wet press method using the molding apparatus 10. First, in step S1, a step of injecting (applying) resin into the fibers F outside the molding apparatus 10 is performed. At this time, the resin injected into the fiber F may contain air.

  Next, as shown in FIGS. 2 and 8, in step S <b> 2, a process of placing the fiber F injected with resin on the upper surface of the lower mold 20 is performed. In this step, the fiber F is placed inside the first seal member 21 on the upper surface of the lower mold 20 and is fitted into the lower mold 20 so as to follow the uneven shape. At this time, the air contained in the resin remains.

  Next, as shown in FIG. 8, a evacuation process is performed in step S3. In this step, the operation of the vacuum device 14 is started and the upper mold 30 is lowered as shown in FIG. At this time, the second cavity C2 is evacuated by the vacuum device 14 in a state where the tip of the rib 31 and the second seal member 22 are in contact with each other and the air inlet 301A is opened. Thereby, before the mold clamping by the lower mold | type 20 and the upper mold | type 30, the air contained in resin is discharged | emitted out of the 2nd cavity part C2. Therefore, it can suppress that a void arises in a molded article.

  Here, the air inlet 301A opened to the second cavity C2 is separated from the resin injected into the fibers F. This prevents the resin injected into the fiber F from being sucked from the intake port 301A. The state where the tip of the rib 31 and the second seal member 22 are in contact with each other and the intake port 301A is opened may be continued for a predetermined time.

  Thereafter, the upper mold 30 is further lowered, and the air inlet 301A is closed by the second seal member 22, but the second cavity C2 is maintained in a vacuum state. The state before the inlet 301A is closed by the second seal member 22 and the mold clamping by the lower mold 20 and the upper mold 30 is started may be continued for a predetermined time.

  Next, as shown in FIG. 8, a mold clamping process is performed in step S4. In this step, as shown in FIG. 4, the lower die 20, the upper die 30, and the first seal member 21 are further lowered by lowering the upper die 30 and bringing the lower surface of the upper die 30 into contact with the first seal member 21. And form the first cavity C1. Then, by lowering the upper mold 30 further, the fiber F into which the resin is injected is clamped by the lower mold 20 and the upper mold 30.

  Here, in a state where the lower mold 20 and the upper mold 30 are clamped, the second seal member 22 compressed by the lower mold 20 and the upper mold 30 is in close contact with the first seal member 21, The space between the lower mold 20, the upper mold 30, the first seal member 21, and the rib 31 is filled. Thereby, since the 1st sealing member 21 and the 2nd sealing member 22 exhibit high sealing performance with respect to the resin inject | poured into the fiber F, it can prevent that resin leaks out of the 1st sealing member 21 outside. . Moreover, since the internal pressure of the 1st cavity part C1 can be kept high, the impregnation property to the fiber F of the resin at the time of mold clamping can be improved.

  Next, as shown in FIG. 8, a curing step is performed in step S5. In this step, the resin impregnated in the fiber F is cured by heating the lower mold 20 and the upper mold 30 to a predetermined temperature by the mold temperature controller 13. In addition, it is not essential to cure the resin by a thermosetting treatment, and the resin may be cured at normal temperature.

  Next, in step S6, a demolding process is performed. In this step, after the resin is cured, the upper mold 30 is raised, and then the molded product is removed from the lower mold 20.

  As described above, in the molding apparatus 10 according to the present embodiment, the first seal member 21 is provided in the lower mold 20 so as to surround the first cavity C1, and the second seal member is provided in the lower mold 20. It is provided so as to surround the first seal member 21 in plan view (see FIGS. 2 to 6). Here, the protrusion height H2 of the second seal member 22 from the parting line 203 is higher than the protrusion height H1 of the first seal member 21 from the parting line 203. On the other hand, the rib 31 is annularly provided on the upper mold 30 so as to face the second seal member 22, and the intake flow path 301 is formed on the upper mold 30 on the inner peripheral side of the rib 31. Are provided so as to open in the second cavity C2 between them. Further, a vacuum device 14 is provided, and this vacuum device 14 evacuates the first cavity portion C1 or the second cavity portion C2 between the lower mold 20 and the upper mold 30 through the intake passage 301. .

  Here, in the molding apparatus 10 according to the present embodiment, when the lower mold 20 and the upper mold 30 are in the closed state, the second state in which the first seal member 21 and the upper mold 30 are in contact with each other. Before reaching, the following first state is passed. In this first state, the second seal member 22 and the rib 31 are in contact with each other, the intake port 301A of the intake passage 301 is opened by the second seal member 22, and the first seal member 21 and the upper mold 30 are also opened. Are separated from each other (see FIG. 3). Therefore, the second die surrounded by the lower die 20, the second seal member 22, the rib 31, and the upper die 30 in a state before the lower die 20 and the upper die 30 are completely closed (that is, the first state). The second cavity C 2 can be evacuated by the vacuum device 14. Therefore, since the space between the lower mold 20 and the upper mold 30 can be evacuated earlier than when the second seal member 22 is not provided, the cycle time can be shortened.

  Further, in the present embodiment in which a fiber reinforced resin molded product is obtained by the wet press method, the second cavity C2 can be evacuated in the first state before the fiber F into which the resin is injected is clamped. Thus, it is possible to suppress voids generated in the molded product while preventing the resin from being sucked.

  In the molding apparatus 10 according to the present embodiment, in the second state where the first seal member 21 and the upper mold 30 are in contact, the second seal member 22 is the first seal member 21, the lower mold 20, and the rib. It is embedded between 31 and the upper mold | type 30 (refer FIG. 4). Thereby, since the sealing performance of the outer periphery of the 1st cavity part C1 can be improved, it can suppress effectively that resin leaks out of the 1st cavity part C1 at the time of mold clamping. Moreover, since the sealing performance of the outer periphery of the first cavity C1 can be improved, the internal pressure of the first cavity C1 increases, so that the resin impregnation into the fiber F during mold clamping can be improved, and the resin in the fiber F Can be suppressed.

  Further, in the molding apparatus 10 according to the present embodiment, the intake flow path 301 is provided so as to open on the outer peripheral side of the first seal member 21 and on the inner peripheral side of the rib 31, and in the first state, It is closed by the second seal member 22. Thereby, it is possible to prevent the resin from coming into contact with the intake port 301A during mold clamping, and it is possible to prevent the intake flow path 301 from being blocked by the resin.

  Further, in the molding apparatus 10 according to the present embodiment, the lower mold 20 is provided with a groove 202 into which a part of the second seal member 22 is fitted. Accordingly, the second seal member 22 is deformed by a sufficient amount at the time of mold clamping without causing the upper mold 30 to stop descending due to the interference between the rib 31 and the lower mold 20, and the first state is changed from the second state. It becomes possible to shift to the state.

  FIG. 9 is a longitudinal sectional view showing a lower mold 120 and an upper mold 30 of a molding apparatus according to another embodiment. As shown in this figure, the lower mold 120 of this embodiment is provided with an annular third seal member 123. The third seal member 123 is provided closer to the center of the mold than the first seal member 21 and in the vicinity of the outer peripheral edge of the fiber F along the outer peripheral edge of the fiber F.

  The third seal member 123 is formed of a rubber material such as silicon rubber, fluorine rubber, butyl rubber, or ethylene propylene rubber. While the cross-sectional shape of the third seal member 123 is elliptical, an arc-shaped groove is formed in an annular shape on the upper surface of the lower mold 20, and the bottom side of the third seal member 123 is fitted into this groove. It is adhered in the state.

  As described above, in the molding apparatus according to this embodiment, in addition to the first seal member 21 and the second seal member 22, the third seal member 123 is provided on the inner peripheral side of the first seal member 21 in the lower mold 20. Is provided in a ring shape. Thereby, since the internal pressure of the 1st cavity part C1 is raised further, the impregnation property of the resin to the fiber F can be improved further.

  10 and 11 are longitudinal sectional views showing a lower mold 220 and an upper mold 230 of a molding apparatus according to another embodiment. As shown in this figure, the lower mold 220 of this embodiment is provided with a second seal member 222 instead of the second seal member 22 in the above-described embodiment. The second seal member 222 has an elliptical cross-sectional shape, and is provided on the upper surface of the lower mold 120 so that the length in the vertical direction is larger than the length in the horizontal direction. Here, the height dimension (for example, 40 mm) of the second seal member 222 is larger than the height dimension (for example, 20 mm) of the second seal member 22 of the above-described embodiment. That is, the height (for example, 24 mm) from the upper surface (parting line) of the lower mold 120 to the upper end of the second seal member 222 is from the upper surface of the lower mold 20 to the upper end of the second seal member 22 in the above-described embodiment. It is larger than the height (for example, 12 mm).

  The upper mold 230 of this embodiment is provided with a rib 231 that can be expanded and contracted instead of the rib 31 in the above-described embodiment. The rib 231 includes a fixed rib 2311 provided on the lower surface of the upper mold 230, a hollow movable rib 2312, and an elastic member 2313. An annular groove 2301 is formed on the lower surface of the upper mold 230, and the base end (upper end) of the fixing rib 2311 is coupled to the bottom of the groove 2301. The front end (lower end) of the fixing rib 2311 is disposed at substantially the same height as the lower surface of the upper mold 230.

  The cross-sectional shape of the movable rib 2312 is U-shaped (U-shaped), the upper end of the movable rib 2312 is opened, and the lower end of the movable rib 2312 is closed. The movable rib 2312 having such a shape is fitted to the fixed rib 2311 so as to be slidable in the vertical direction. The movable rib 2312 and the fixed rib 2311 are provided with stoppers (not shown) to prevent the movable rib 2312 from being detached from the fixed rib 2311.

  The elastic member 2313 is, for example, a compression coil spring as illustrated, and is provided inside the movable rib 2312. When the movable rib 2312 rises relative to the fixed rib 2311 due to a load from below, the elastic member 2313 elastically compresses and deforms. On the other hand, when the load from below on the movable rib 2312 decreases, the elastic member 2313 lowers the movable rib 2312 relative to the fixed rib 2311 by the elastic return force. The elastic member 2313 is not limited to a compression coil spring, and may be another elastic member such as rubber or a leaf spring.

  The rib 231 and the second seal member 222 are arranged so that the positions of the centers in the width direction coincide with each other in plan view. For this reason, when the upper mold 230 is lowered, the rib 231 contacts the center of the second seal member 222 in the width direction.

  As shown in FIG. 10, when the upper mold 230 is lowered and the rib 231 comes into contact with the second seal member 222, the movable rib 2312 is relative to the fixed rib 2311 against the elastic force of the elastic member 2313. To rise. At this time, the movable rib 2312 contacts the center of the second seal member 222 in the width direction and elastically deforms the second seal member 222. Accordingly, as shown in FIG. 11, the second seal member 222 is reduced in thickness and elastically deformed so as to spread on both sides in the width direction. At this time, the inner peripheral side of the second seal member 222 contacts the first seal member 21. Thereby, there is no gap between the first seal member 21 and the second seal member 222, and the second seal member 222 fills the space between the lower mold 220, the upper mold 230, the first seal member 21, and the rib 231. It becomes a state.

  As described above, in the molding apparatus according to the present embodiment, the rib 231 provided on the upper mold 230 can be expanded and contracted, so that the protruding amount of the rib 231 from the parting line can be set large, or the second seal The protrusion amount of the member 222 from the parting line can be set large. Thereby, compared with the above-mentioned embodiment, it becomes possible to set widely the space | interval of the lower mold | type 220 and the upper mold | type 230 in the state (1st state) in which the 2nd cavity part C2 is formed. Thus, it becomes possible to start evacuation of the second cavity C2 even earlier.

  12 and 13 are longitudinal sectional views showing a lower mold 320 and an upper mold 330 of a molding apparatus according to another embodiment. As shown in this figure, the lower mold 320 of this embodiment is provided with a second seal member 322 instead of the second seal member 22 in the above-described embodiment. The second seal member 322 has an elliptical cross-sectional shape, and is provided on the upper surface of the lower mold 320 so that the length in the vertical direction is larger than the length in the horizontal direction. Here, the height dimension of the second seal member 322 is larger than that of the second seal member 22 of the above-described embodiment. That is, the height from the upper surface of the lower mold 320 to the upper end of the second seal member 322 is larger than the height from the upper surface of the lower mold 20 to the upper end of the second seal member 22 in the above-described embodiment. .

  In the upper mold 330 of this embodiment, a groove 331 is provided instead of the rib 31 in the above-described embodiment. The width of the groove 331 is larger than the width of the second seal member 322. One end in the width direction of the groove 331 (end on the outer periphery side of the mold) and one end in the width direction of the second seal member 322 (end on the outer periphery side of the mold) coincide with each other in plan view. . On the other hand, the other end in the width direction of the groove 331 (end on the center side of the mold) and one end in the width direction of the first seal member 21 (end on the outer periphery side of the mold) have a single position in plan view. I'm doing it. Here, the intake port 301 </ b> A is arranged at the bottom of the groove 331.

  As shown in FIG. 12, when the upper mold 330 is lowered and the second seal member 322 contacts the side wall of the groove 331, the side wall of the groove 331 deforms the second seal member 322. Here, when the second seal member 322 comes into contact with the side wall of the groove 331, the air inlet 301A is open, so that the second cavity C1 is evacuated.

  As shown in FIG. 13, when the upper die 330 is further lowered, the second seal member 322 is brought into contact with the bottom of the groove 331 to be reduced in thickness and deformed so as to spread toward the center of the mold. At this time, the second seal member 322 contacts the first seal member 21. As a result, there is no gap between the first seal member 21 and the second seal member 322, and the second seal member 322 fills the space between the lower mold 320, the upper mold 330, the first seal member 21, and the groove 331. It becomes a state.

  As described above, in the molding apparatus according to the present embodiment, in the first state, the side wall of the groove 331 provided in the upper mold 330 and the second seal member 322 abut, and in the second state, The two seal members 322 are deformed so as to fill the groove 331. Thereby, compared with the above-described embodiment in which the second seal members 22 and 222 are deformed by the ribs 31 and 231, the deformation of the second seal member 322 can be simplified, and the design of the seal structure can be facilitated.

  By the way, the inventor of the present application conducted an experiment for confirming the effect of the molding apparatus 10 according to the above-described embodiment. Hereinafter, this experiment and its results will be described.

  In this experiment, as shown in Table 1 below, a CFRP molded product was prepared by setting the molding method, temperature, amount of resin to be used, presence / absence of the second seal member 22, and presence / absence of the third seal member 123. . The presence / absence and degree of voids generated in the produced CFRP molded product, the thickness of the molded product, and the strength of the molded product were evaluated. Here, when a resin leak occurs from the first cavity C1 or the second cavity C2, the thickness of the molded product becomes smaller than the design value. Therefore, in this experiment, the presence or absence of resin leakage during molding was evaluated by evaluating the thickness of the molded product.

  No. in Table 1 above. 6-No. The eleven samples correspond to the examples of the present invention and include the second seal member 22. In contrast, No. 1 in Table 1 below. 1-No. Sample 5 corresponds to a comparative example for explaining the effect of the present invention, and does not include the second seal member 22 and the rib 31. The second seal member 22 is provided on the lower mold 20 so as to surround the first seal member 21 and to have a protruding height from the parting line larger than that of the first seal member 21 as in the above-described embodiment. . Moreover, the rib 31 was provided in an annular shape so as to face the second seal member 22 in the upper mold 30 as in the above-described embodiment. Further, the third seal member 123 is provided in an annular shape closer to the center of the mold than the first seal member 21 of the lower mold 20, as in the above-described embodiment.

  No. In the comparative example 1, the RTM method, that is, a molding method in which the inside of the cavity between the upper mold and the lower side is evacuated after the mold is closed, and then the resin is filled in the cavity, and the temperature is kept constant. Conditions and the amount of resin used were constant. No. In the comparative example 1, the second seal member 22 and the third seal member 123 were not provided in the mold.

  No. In Comparative Example 1, no void was generated. No. The thickness of the molded product in one comparative example was within the tolerance of the design value. That is, NO. About 1 comparative example, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In Comparative Example 1, the molded product did not have insufficient strength.

  No. In the comparative example 2, a wet press method, that is, a resin in which resin is injected into the fiber outside the mold and the fiber is placed in the lower mold and clamped is used, and the resin is used at a constant temperature. The amount of was constant. No. In the comparative example of 2, the second sealing member 22 and the third sealing member 123 were not provided in the mold, and the evacuation of the cavity between the upper mold and the lower side was not performed.

  No. In Comparative Example 2, voids exceeding the allowable range were generated. On the other hand, NO. The thickness of the molded product in Comparative Example 2 is NO. Although the error with respect to the design value was larger than that of the comparative example 1, it was within the tolerance of the design value. That is, NO. About the comparative example of 2, it can be evaluated that the resin leakage from the hollow portion between the upper mold and the lower mold did not occur or was within an allowable range. Furthermore, NO. Although the strength of the molded product in Comparative Example 2 is not insufficient in terms of product quality, no. No. 1 and a No. 1 described later. It was low compared with the comparative example of 3.

  No. In the comparative example 3, the wet press method was adopted, the temperature was set to a steady condition, and the amount of resin used was set to be larger than the steady value. No. In the comparative example 3, the second sealing member 22 and the third sealing member 123 were not provided in the mold, and the evacuation of the cavity between the upper mold and the lower side was not performed.

  No. In the comparative example of No. 3, although it cannot be said that the product quality is unacceptable, No. 1 and a later-described No. 1 Compared with the comparative examples of 4 and 5, a large amount of voids occurred. No. As for the thickness of the molded product in the comparative example No. 2, although it is within the tolerance of the design value, No. 1 and a later-described No. 1 Compared with the comparative example of 5, the error with respect to the design value became large. That is, no. For the comparative example No. 3, Compared with the comparative examples 1, 2, and 4, it can be evaluated that the amount of resin leakage from the cavity between the upper mold and the lower mold was large. Furthermore, no. For the strength of the molded product in the comparative example of No. 3, Although it was low compared with the comparative example 1, it was sufficient.

  No. In Comparative Example 4, the wet press method was adopted, the temperature was set to a steady condition, and the amount of resin used was set to a steady state. No. In the comparative example 4, the second seal member 22 is not provided in the mold, whereas the third seal member 123 is provided in the mold. Furthermore, no. In the comparative example of 4, the evacuation of the cavity between the upper mold and the lower mold was not performed.

  No. The void in the comparative example 4 Although it was a large amount when compared with the comparative example of 1, it was within the allowable range. No. About the thickness of the molded product in the comparative example of 4, it exceeded the range of the tolerance of the design value. That is, NO. About the comparative example of 2, it can be evaluated that the resin leaked from the cavity between the upper mold and the lower mold. Furthermore, no. As for the strength of the molded product in the comparative example of No. 4, although it cannot be said that the product quality is insufficient, It was low compared with the comparative examples 1 and 3.

  No. In the comparative example of 5, the wet press method was adopted, the temperature was set to a steady condition, and the amount of resin used was set to be larger than the steady value. No. In the comparative example of 5, the second seal member 22 is not provided in the mold, whereas the third seal member 123 is provided in the mold (lower mold). Furthermore, no. In the comparative example of 5, the cavity between the upper mold and the lower mold was not evacuated.

  No. The voids in the comparative example of No. 5 Although it was large compared with the comparative example 1, it was within the allowable range. No. No. 5 regarding the thickness of the molded product in the comparative example. Although the error with respect to the design value was larger than that of the comparative example 1, it was within the tolerance of the design value. That is, NO. About the comparative example of 2, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur, or even if it occurred, it was a trace amount so as not to affect the product quality. Furthermore, no. No. 4 regarding the strength of the molded product in the comparative example. Although it was low compared with the comparative example 1, it was sufficient.

  No. In Example 6, the wet press method was adopted, the temperature was a steady condition, and the amount of resin used was a steady. No. In the sixth embodiment, the second seal member 22 and the rib 31 are provided in the mold, whereas the third seal member 123 is not provided in the mold. Furthermore, no. In Example 6, the cavity between the upper mold and the lower mold was evacuated in the same manner as in the above-described embodiment.

  No. In the example of No. 6, no. As in the comparative example 1, no void was generated. No. No. 6 regarding the thickness of the molded article. Like the comparative example 1, it was within the tolerance of the design value. That is, NO. About 1 comparative example, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In the comparative example of No. 6, Similar to the comparative example 1, the molded product did not have insufficient strength.

  No. In Example 7, the wet press method was adopted, the temperature was a steady condition, and the amount of resin used was a steady. No. In Example 7, the second seal member 22 and the rib 31 were provided on the mold, and the third seal member 123 was provided on the mold (lower mold 130). Furthermore, no. In Example 7, the inside of the cavity between the upper mold 30 and the lower mold 130 was evacuated as in the above-described embodiment. That is, no. Example 7 has the same configuration as that of the embodiment shown in FIG.

  No. In the embodiment of No. 7, no. As in the comparative example 1, no void was generated. No. No. 7 regarding the thickness of the molded article. Like the comparative example 1, it was within the tolerance of the design value. That is, NO. About Example 7, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In the embodiment of FIG. Similar to the comparative example 1, the molded product did not have insufficient strength.

  No. In Example 8, the wet press method was adopted, the temperature was a steady condition, and the amount of resin used was small. No. In the eighth embodiment, the second seal member 22 and the rib 31 are provided on the mold, whereas the third seal member 123 is not provided on the mold. Furthermore, no. In Example 8, the cavity between the upper mold and the lower mold was evacuated in the same manner as in the above-described embodiment.

  No. The voids in Example 8 were within the allowable range although they were large compared to other Examples. No. No. 8 regarding the thickness of the molded article. Like the comparative example 1, it was within the tolerance of the design value. That is, NO. About Example of 8, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In the example of No. 8, no. Similar to the comparative example 1, the molded product did not have insufficient strength.

  No. In Example 9, the wet press method was adopted, the temperature was a steady condition, and the amount of resin used was increased. No. In the ninth embodiment, the second seal member 22 and the rib 31 are provided on the mold, whereas the third seal member 123 is not provided on the mold. Furthermore, no. In Example 9, the cavity between the upper mold and the lower mold was evacuated as in the above-described embodiment.

  No. In the embodiment of No. 9, no. As in the comparative example 1, no void was generated. No. No. 9 regarding the thickness of the molded product. Like the comparative example 1, it was within the tolerance of the design value. That is, NO. About Example 9, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In the embodiment of No. 9, no. Similar to the comparative example 1, the molded product did not have insufficient strength.

  No. In the ten examples, the RTM method was adopted, the temperature was a steady condition, and the amount of resin used was a steady. No. In the tenth embodiment, the second seal member 22 and the rib 31 are provided in the mold, whereas the third seal member 123 is not provided in the mold.

  No. In the tenth embodiment, no. As in the comparative example 1, no void was generated. No. Regarding the thickness of the molded product in the tenth embodiment, Like the comparative example 1, it was within the tolerance of the design value. That is, NO. About 10 Examples, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In the tenth embodiment, no. Similar to the comparative example 1, the molded product did not have insufficient strength.

  No. In Example 11, the PCM (Pre-preg Compression Molding) method was adopted, the temperature was a steady condition, and the amount of resin used was steady. No. In the eleventh embodiment, the second seal member 22 and the rib 31 were provided in the mold, whereas the third seal member 123 was not provided in the mold. Furthermore, no. In the example of 11, the cavity between the upper mold and the lower mold was evacuated as in the above-described embodiment.

  No. In the eleventh embodiment, no. As in the comparative example 1, no void was generated. No. No. 11 regarding the thickness of the molded article. Like the comparative example 1, it was within the tolerance of the design value. That is, NO. About 11 examples, it can be evaluated that the resin leakage from the cavity between the upper mold and the lower mold did not occur. Furthermore, no. In the eleventh embodiment, no. Similar to the comparative example 1, the molded product did not have insufficient strength.

The following items (1) to (3) were confirmed from this experiment.
(1) In Examples 6 to 11 in which the second seal member 22 is provided using the wet press method, the RTM method, or the PCM method, the RTM method is used to evaluate the presence / absence of voids and the generation amount and resin leakage. Even when compared with Comparative Example 1 in which the second seal member 22 was not used, it was as good as the same or comparable.
(2) In Examples 6, 7, 9, and 10 in which the second seal member 22 is provided using the wet press method, and the amount of resin used is constant or large, the presence or absence of voids and the amount generated, and resin leakage And No. using the RTM method. The same high evaluation as in Comparative Example 1 was obtained. Even in Example 8 where the second seal member 22 was provided using a wet press method and the amount of resin used was small, the evaluation of the presence or absence of voids and the amount of generated resin and the leakage of the resin were No. Even if it compared with the comparative example of 1, it was so favorable that there was no inferiority.
(3) About Comparative Examples 2-5 which uses the wet press construction method and does not provide the 2nd sealing member 22, at least one evaluation of the presence or absence and generation amount of a void and resin leakage is No. It was inferior compared with the comparative example 1.

  The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

  For example, in the above-described embodiment, the first seal member 21 is provided on the lower mold 20, 120, 220, 320, but may be provided on the upper mold 30, 230, 330. In addition, the second seal member 22 is provided in the molding die provided with the first seal member 21 (lower die in the above embodiment), but the molding die not provided with the first seal member 21 (upper in the above embodiment). Type). In this case, the ribs 31 and 231, the groove 331, and the intake passage 301 may be provided in a molding die (the lower die in the above-described embodiment) provided with the first seal member 21.

  In the above-described embodiment, the present invention has been described by taking the molding apparatus and the molding method for obtaining a molded article made of fiber reinforced resin as an example, but for obtaining a molded article made only of resin. The present invention can also be applied to an injection molding apparatus and an injection molding method. Even in such a case, evacuation of the cavity between the upper mold and the lower mold can be started at an early stage, and the effect that the cycle time can be shortened can be obtained.

DESCRIPTION OF SYMBOLS 10 Molding apparatus 14 Vacuum apparatus 20 Lower mold | type 21 1st seal member 22 2nd seal member 202 Groove 203 Parting line 30 Upper mold | type 31 Rib 301 Intake flow path 120 Lower mold | type 123 3rd seal member 220 Lower mold | type 222 2nd seal member 230 Upper mold 231 Rib 320 Lower mold 322 Second seal member 330 Upper mold 331 Groove C1 First cavity C2 Second cavity F Fiber

Claims (6)

A molding apparatus for molding a molded article containing a resin,
Forming a molding space corresponding to the shape of the molded product, a first molding die and a second molding die provided so as to be relatively close to and away from each other; and
A first seal member provided in the first mold so as to surround the molding space; and provided in one of the first mold and the second mold so as to surround the first seal member; Compared with the seal member, a second seal member having a high protruding height from the parting line of the first mold and the second mold,
An abutting portion provided annularly on the other of the first mold and the second mold so as to face the second seal member;
An intake air flow provided to the other of the first mold and the second mold so as to open into a space between the first mold and the second mold on the inner peripheral side of the contact portion. Road,
A vacuum device that evacuates the space between the first mold and the second mold through the intake flow path;
From the state where the first mold and the second mold are opened, the second seal member and the contact portion are in contact with each other, and the intake passage is opened by the second seal member, and A molding apparatus that enters a second state in which the first seal member and the second molding die come into contact with each other via a first state in which the first sealing member and the second molding die are separated from each other.   2. The molding apparatus according to claim 1, wherein, in the second state, the second seal member is embedded between the first seal member, the first molding die, the contact portion, and the second molding die. .   The molding apparatus according to claim 1, wherein the intake flow path is provided so as to open on an outer peripheral side of the first seal member, and is closed by the second seal member in the first state.   The molding apparatus according to claim 1, wherein a groove into which a part of the second seal member is fitted is formed on the other of the first mold and the second mold. Forming a molding space corresponding to the shape of the molded product, a first molding die and a second molding die provided so as to be relatively close to and away from each other; and
A first seal member provided in the first mold so as to surround the molding space; and provided in one of the first mold and the second mold so as to surround the first seal member; Compared with the seal member, a second seal member having a high protruding height from the parting line of the first mold and the second mold,
An abutting portion provided annularly on the other of the first mold and the second mold so as to face the second seal member;
An intake air flow provided to the other of the first mold and the second mold so as to open into a space between the first mold and the second mold on the inner peripheral side of the contact portion. Road,
Preparing a molding apparatus comprising a vacuum device for evacuating a space between the first molding die and the second molding die through the intake passage;
The first mold and the second mold are brought relatively close to bring the second seal member and the contact portion into contact with each other, and the intake passage is opened by the second seal member. And in the first state in which the first seal member and the second mold are separated from each other, the first mold, the second mold, the second seal member, and the contact portion are surrounded. After evacuating the space with the vacuum device,
A molding method for clamping the first mold and the second mold. The resin-injected fiber is disposed on the inner peripheral side of the first sealing member of the first mold,
The molding method according to claim 5, wherein the first mold and the second mold are brought relatively close to each other.

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