JPH0325328B2 - - Google Patents

Description

Detailed Description of the Invention A. Purpose of the Invention (1) Industrial Field of Application The present invention is directed to the production of a synthetic resin laminate molded product formed by integrally joining first and second molded products that are polymerized with each other. The present invention relates to a method and a manufacturing apparatus.

(2) Conventional technology Conventionally, in manufacturing this type of laminated molded product, an intermediate mold is sandwiched between opposing surfaces of an upper mold and a lower mold that can be moved close to each other and separated from each other, and a screen is formed between the upper mold and the intermediate mold. a molding step of simultaneously compression molding a first molded body in a semi-cured state through a first cavity formed and a second molded body in a semi-hardened state through a second cavity defined between a lower mold and an intermediate mold; ;separating the first and second molded bodies from the intermediate mold with the upper mold and the lower mold respectively attached;
an intermediate mold removing step in which the intermediate mold is separated from the opposing gap between the upper mold and the lower mold to directly face the first and second molded bodies;
and a joining step of joining the second molded bodies in a polymerized state and completely curing them. Public bulletin). In these proposals, the molding of the first and second molded bodies and the polymerization bonding can be performed efficiently and accurately using a common mold device, and the equipment cost can be reduced. There are advantages.

(3) Problems to be Solved by the Invention By the way, in the molding process of the first and second molded bodies, the molding material in a semi-hardened state flows to various parts of the cavity in the heated cavity. If air is drawn in, pores will be generated in both molded bodies, and there is a risk that the quality of the laminated molded body will deteriorate.

In addition, after the molding process is completed, in order to reliably release the first and second molded bodies from the intermediate mold when separating the upper mold and the lower mold from the intermediate mold, there is a knob for mechanically pushing the molded bodies. It is conceivable to provide an extrusion means such as an out pin in the intermediate die, but in that case, there are problems such as the thickness and weight of the intermediate die being significantly increased due to the special provision of the extrusion means.

The purpose of the present invention is to provide a method for manufacturing a synthetic resin laminate molded product and an apparatus for manufacturing the same, which can solve such problems without major design changes to mold equipment or significant increases in cost. do.

B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a synthetic resin laminate molded body formed by integrally joining first and second molded bodies that are polymerized with each other. In manufacturing, an intermediate mold is sandwiched between opposing surfaces of an upper mold and a lower mold that can be approached and separated from each other. 1
a molding step of simultaneously compression molding the molded body and the second molded body in a semi-cured state through a second cavity defined between a lower mold and an intermediate mold; The molds are separated from the intermediate mold while attached to the upper mold and the lower mold, and separated from within the opposing gap between the intermediate mold and the upper mold and the lower mold, so that the first and second molded bodies directly face each other. a joining step of closing the upper mold and the lower mold to join the first and second molded bodies in a polymerized state and completely curing them;
In the method for manufacturing a synthetic resin laminate molded body, the intermediate mold is provided with ventilation holes on the first and second molding surfaces facing the first and second cavities, respectively, and the In the molding process, the first and second
Vacuum suction is carried out in the cavity, and pressurized air is blown into the first and second cavities through the ventilation hole when separating the upper mold and the lower mold from the intermediate mold after the completion of the molding process. The first feature is that the first and second molded bodies are released from the intermediate mold, and the upper mold and the lower mold are movable toward and away from each other, and the operation of being sandwiched between the two molds is provided. and an intermediate mold that is movable between the upper mold and the standby position separated from the opposing space between the two molds, and a first cavity for compression molding the first molded body between the upper mold and the intermediate mold. , a second cavity for compression molding a second molded body to be polymerized with the first molded body is defined between the lower mold and the intermediate mold, and the first molded body is placed in the upper mold, and By closing the lower mold with the second molded body attached thereto without using an intermediate mold between the two molds,
In the apparatus for manufacturing a synthetic resin laminate molded body, in which the first and second molded bodies are joined together in a polymerized state, the intermediate mold includes:
Vent holes are provided in the first and second molding surfaces facing the first and second cavities, respectively, and these vent holes are connected in parallel to a suction pump and a blower via a switching valve. A second feature is that an attachment mechanism is provided for attaching the first molded body to the upper mold when the intermediate mold is separated from the mold.

(2) Effect The vacuum suction from the vent hole in the intermediate mold effectively prevents air from being entrained in the fluid molding material during the molding process, and by extension, the generation of pores in the molded product. Furthermore, when the upper mold and the lower mold are separated from the intermediate mold after the completion of the molding process, pressurized air is blown into the first and second cavities through the ventilation holes. 2
Since the molded product can be released from the intermediate mold more easily, there is no need to provide a special extrusion device such as a knockout pin for mechanically pushing the molded product in the intermediate mold for releasing the molded product.

Furthermore, due to the fact that the ventilation holes are opened in the first and second molding surfaces of the intermediate mold, the first and second
The surface of the molded body may have irregularities corresponding to the ventilation holes, but since the surface is the facing surface of the first and second molded bodies, the appearance can be seen from the outside by joining the molded bodies to each other. Well hidden. Furthermore, since the ventilation holes are collectively provided in the intermediate mold, piping can be concentrated and simplified compared to the case where the ventilation holes are provided separately in the upper and lower molds.

In particular, according to the above manufacturing apparatus, the upper mold is provided with an attachment mechanism for adhering the first molded body to the upper mold when the upper mold is separated from the intermediate mold, so that the upper mold is separated from the intermediate mold. However, the first molded body is accurately held in the upper die against its own weight.

(3) Example FIG. 1 shows a fiber-reinforced synthetic resin laminate molded body L, in which first and second molded bodies m ₁ and m ₂ are joined together by polymerizing each other. It consists of Glass fiber is used as the reinforcing fiber, and unsaturated polyester resin is used as the synthetic resin that is the matrix.

The manufacturing apparatus for the laminated molded body L is mainly constructed as shown in FIGS. 2, 2A, 2B, and 3.

That is, a lower mold 1 2 as a second mold is disposed below an upper mold 1 ₁ as a first mold, and an intermediate mold _{1 3 is} disposed below an upper mold 1 1 as a first mold.
It is horizontally movable so that it can be inserted and removed between ₁ and 1 ₂ . These upper and lower molds 1 ₁ , 1 ₂ and intermediate mold 1 ₃ constitute a compression mold 1 . The upper mold 1 ₁ is connected to a piston rod 3 ₁ of a pneumatic or hydraulic first actuating cylinder 2 ₁ via a support plate 4 and can be moved up and down, while the lower mold 1 ₂ is connected to a base via a support plate 5. 6 ₁ Fixed on the top surface.

When the upper mold 1 ₁ is raised and opened, an intermediate mold holding frame 7 is disposed between the upper mold 1 ₁ and the lower mold 1 ₂ , and the lower mold 1 ₂ is attached to the outer edge of the holding frame 7 . Support plate 5
A plurality of guide pins 8 erected therethrough are slidably inserted therethrough. A cushion spring 9 loosely fitted to each guide pin 8 is compressed between the holding frame 7 and the support plate 5, and when the mold is opened, the holding frame 7 is moved by the springing force of each cushion spring 8 to the enlarged head 8a of each guide pin 8. It is located above the lower mold 1 2 in contact with the lower mold 1 ₂ .

As clearly shown in FIG. 3, the holding frame 7 has a substantially U-shape in plan view with one side open, and both opposing parts 7a,
7a and the connecting portion 7b of the opposing portions 7a, 7a
A retaining groove 10 that opens inward is formed on the inner surface of the housing.

On the opening side of the holding frame 7, an intermediate mold guide frame 11 is mounted on the base ₆₂ so as to face the holding frame 7 and to be located on the same water surface as the supporting member 12.
Fixed via. The guide frame 11 includes a pair of opposing parts 11a, 11a parallel to both opposing parts 7a, 7a of the holding frame 7, and the opposing parts 11a, 11a.
It is formed into a substantially U-shape in plan with one side on the holding frame 7 side open. Guide grooves 13 that open inward are formed on the inner surfaces of both opposing portions 11a, 11a and connecting portion 11b. A pneumatic or hydraulic second actuating cylinder 2 ₂ is fixed to the outer surface of the connecting portion 11 b of the guide frame 11 with its axis oriented in the longitudinal direction of the opposing portions 11 a, 11 a, and its piston rod 3 ₂ connects the guide frame 11. The space between the opposing parts 11a, 11a and the opposing parts 7a, 7a of the holding frame 7 can be expanded and contracted by penetrating the part 11b.

Both opposing parts 11a, 11a in the guide frame 11
Both sides of the intermediate mold 1 ₃ are slid into the guide groove 13 of the
The intermediate mold 1 ₃ and the piston rod 3 ₂ are respectively provided with radii 14 ₁ and 14 ₂ of the coupling mechanism 14 which can be in a blocking state. Thus half 1 of the coupling mechanism 14
4 ₁ , 14 ₂ are in a connected state and the intermediate mold 1 ₃ is located within the guide frame 11 , when the piston rod 3 ₂ of the second working cylinder 2 ₂ is extended, the intermediate mold 1 ₃ is moved from the guide frame 11 . It slides into the holding groove 10 of the holding frame 7 and comes into contact with the connecting portion 7b, thereby positioning the intermediate mold 1 ₃ with respect to the upper mold 1 ₁ and the lower mold 1 ₂ . half body 14 ₁ of the coupling mechanism 14;
14 ₂ is shut off and the piston rod 3 ₂ is retracted, the intermediate mold 1 ₃ is left in the holding frame 7. When removing the intermediate mold 1 ₃ from the holding frame 7, the piston rod 3 ₂ is extended again and the halves 14 ₁ of the coupling mechanism 14 are removed.
14 ₂ are connected and then the piston rod 3 ₂ is contracted, the intermediate mold 1 ₃ is moved from the holding frame 7 to the guide frame 11.
The position of the intermediate mold 1 ₃ is the connecting member 1
4 is regulated by contacting the connecting portion 11b of the guide frame 11.

A large recess 15 is formed on the lower surface of the upper mold 1 ₁ facing the intermediate mold _{1 3} , and a large recess 15 is loosely fitted into the recess 15 on the upper surface of the intermediate mold 1 ₃ facing the upper mold 1 1.
A convex portion 16 is formed as a first molding surface. When the upper mold 1 ₁ and the intermediate mold 1 ₃ are closed, the concave portion 15 and the convex portion 16 define a first cavity c ₁ (FIG. 4) for compression molding the first molded body m ₁ .

A protrusion 17 is provided on the upper surface of the lower mold 1 ₂ facing the intermediate mold 1 ₃ . Three small protrusions 17a and a small recess 17b located between the adjacent small protrusions 17a are formed on the upper surface of the protrusion 17, and the lower surface of the intermediate mold ₁₃ facing the lower mold ₁₂ is , three small recesses 18b into which each of the small projections 17a is loosely fitted, and a small projection 18a into which each of the small projections 17a is loosely fitted are formed. It constitutes the second molding surface 18. When the lower mold 1 ₂ and the intermediate mold 1 ₃ are closed, their small convex portions 17a and small concave portions 18b
and a second cavity c ₂ for compression molding the second molded body m ₂ by the small recess 17b and the small protrusion 18a.
(Fig. 4) is defined.

Further, on the lower surface of the intermediate mold 1 ₃ , an edge to be trimmed is formed on the second molded body m ₂ on the outside of the small recesses 18b on both sides in cooperation with the outer surface of the protrusion 17 of the lower mold 1 2 _. A protruding portion 18c is provided.

Heaters 19 ₁ to 19 ₃ for heating the upper mold 1 ₁ , the lower mold 1 ₂ and the intermediate mold 1 ₃ are embedded therein.

In addition, three knockout pins 20 that can protrude from the top surface of each small convex portion 17a are slid onto the lower mold ₁₂ ,
Each knockout pin 20 is connected via a support plate 21 to a piston rod ₃₃ of a third pneumatic or hydraulic working cylinder ₂₃ .

On the lower surface of the upper mold 1 ₁ on both sides of the recess 15, there are biting protrusions 3 that bite into the edges to be trimmed during molding of the first molded body m ₁ .
A cam slide 35 with 5a is provided. Since the support structure and movement mechanism of these cam slides 35 are the same, the cam slides 35 are
According to figure A, the right cam slide 3 in figure 2
5 will be explained.

As clearly shown in FIGS. 2A and 2B, a pair of guide protrusions 36 (only one is shown in the figure) having a T-shaped cross section are formed on the upper surface of the cam slide 35, and each guide protrusion 36 is formed on the upper surface of the cam slide 35. The _cam slide 36 slides into the guide groove 37 having a T-shaped cross section that opens on the lower surface of the upper mold ₁
It is designed to be able to move forward and backward relative to the opening.

On the outside of each guide protrusion 36, a hook-shaped recess 38 that opens downward and toward the side of the upper mold ₁ is formed in the cam slide 35, and the top wall of the recess 38 is formed on the outer side of the upper mold ₁ . A cutout groove 39 that is cut deeper is formed. A suspension bolt 40 is inserted into the notch groove 39, and the suspension bolt 40 is screwed onto the upper die ₁₁ . A retaining plate 41 through which a suspension bolt 40 is passed is applied to the top wall of the recess 38, and the suspension bolt 40 is loosely fitted between the retaining plate 41 and a washer 42 applied to the suspension bolt head 40a. The spring 43 that has been compressed is then contracted. In this case, the set load of the spring 43 is set so as not to hinder the movement of the cam slide 35 back and forth.

Inside each guide protrusion 36, the cam slide 35 is provided with a window 44 that is open at the top and bottom, as clearly shown in FIGS. 2A, 4A, and 6A.
The first one near the biting protrusion 35a in the window 44
The slope 45 ₁ slopes from the top to the bottom so that its lower edge approaches the lower corner of the biting convex portion 35 a, and the second slope 45 ₂ that is far from the biting convex portion 35 a has its lower edge. is inclined from the top toward the bottom so that it is farther away from each corner below the biting convex portion 35a.

As shown in FIGS. 2 and 4A, the first slope 4 of the cam slide 35 is placed on both sides of the convex portion ₁₆ of the intermediate mold 13.
A first cam driver 47 ₁ having a slope 46 that slides on the cam slide 35 and advances the cam slide ₃₅ is protruded from the lower mold 1 as shown in FIG. 6A.
_{The second} cam driver 4 is provided with slopes 48 on both sides of the protrusion 17 of the cam slide 35 that slide against the second slope 45 ₂ of the cam slide 35 to move the cam slide 35 backward.
7 ₂ is installed protrudingly.

As shown in FIG. 2B, cam slide 35
In the top wall of the hook-shaped recess 38, a through hole 49 is formed between the biting convex portion 35a and the notch groove 39, a steel ball 50 is slid into the upper part of the through hole 49, and a set screw 51 is installed at the lower part. is screwed on.
Place the steel ball 50 between the steel ball 50 and the set screw 51 in the upper die 1 ₁
A spring 52 is contracted so as to spring toward the opposite direction. Upper mold 1
Two first and second engaging recesses 53 ₁ , 53 on the lower surface of _1
2 is formed along the forward and backward direction of the cam slide 35.

When the steel ball 50 engages with the first engaging recess 53 ₁ of the upper die 1 ₁ which is closer to the recess 15, the cam slide 35 engages the biting protrusion 35a as shown in FIG. 4A.
It is held in an advanced position in which the tip protrudes from the edge of the recess 15 in the upper die ₁₁ into the opening. Also steel ball 5
0 engages with the other second second engaging recess 53 ₂ , the cam slide 35 holds the tip of the biting convex portion 35 a in the retracted position where the tip of the biting convex portion 35 a is retracted from the edge of the recess 15 as shown in FIG. 6A. be done.

The cam slide 35 and the first cam driver 47
₁ , steel ball 50, spring 52, and first engagement recess 53 ₁
constitutes an attachment mechanism A ₁ of the present invention that attaches the first molded body m ₁ to the upper die 1 ₁ .

The intermediate mold 1 ₃ includes an airtight chamber 22 and its airtight chamber 2.
A large number of ventilation holes 26 are formed extending from the convex portion 16 and opening on the outer surface (first molding surface) of the convex portion 16 and the inner surface (second molding surface) of the small recess 18b, respectively. It is connected in parallel to the vacuum pump 24 and the blower 28 via 27.

These airtight chambers 22, all ventilation holes 26, and vacuum pumps 24 are connected to the first and second molded bodies m ₁ ,
A vacuum suction mechanism V is configured to apply vacuum suction to the first and second cavities c ₁ and c ₂ during compression molding of m ₂ .

A conveyor 29 for conveying the laminated molded product L is disposed near the base 6 ₂ of the guide frame 11 . Further, a moving rod 32 of a transfer machine 31 for transferring the laminated molded product L from the lower die ₁₂ to the conveyor 29 is slid onto a support 30 erected on a base ₆₂ near the conveyor 29. Lower mold 1 at the tip of
A plurality of vacuum suction cups 33 are provided so that they can face _each other.

Next, manufacturing of the laminate molded body L using the manufacturing apparatus will be explained.

When the compression mold 1 is opened, as shown in FIG. 2, the upper mold 1 ₁ is located above the holding frame 7, the intermediate mold 1 ₃ is located within the guide frame 11, and the linking member 14 is in a connected state. . Each knockout pin 20 is recessed into the lower mold 1 ₂ , and its tip end surface is held on the same plane as the top surface of each small convex portion 17 a of the lower mold 1 ₂ . The moving rod 32 of the transfer machine 31 is moving so that its suction cup 33 is located above the conveyor 29.
The vacuum pump 24 and the blower 28 are inactive, and the switching valves 27 are switched to the vacuum pump 24 side. The cam slide 35 is in the retracted position, and this position is maintained by the steel ball 50 engaging with the second engaging recess 53 ₂ .

Before the molding operation, the upper mold 1 ₁ , the lower mold 1 ₂ and the intermediate mold 1 ₃ are heated to the molding temperature by respective heaters 19 ₁ to 19 ₃ . In addition, _{glass fibers} ,
Putty-like molding materials COM ₁ and COM ₂ made of unsaturated polyester resin mixed with fillers, thickeners, etc. are placed, respectively.

The second actuating cylinder ₂₂ is operated to extend its piston rod ₃₂ , and the intermediate mold ₁₃ is slid into the holding frame 7 through the guide frame 11 and positioned as shown by the chain line in FIG.

The connecting member 14 is cut off, the second actuating cylinder 2 ₂ is operated again to contract the piston rod 3 ₂ , and only the piston rod 3 ₂ is moved to the guide frame 11 .
move inside.

As shown in FIG. 4, the first actuating cylinder ₂₁ is operated to extend its piston rod ₃₁ and lower the upper die ₁₁ . This allows each cam slide 3
The first slope 45 ₁ of the first cam driver 47 ₁ slides on the slope 46 of each first cam driver 47 1 to move each cam slide 35 forward, and as shown in FIG.
The lower surface of is in contact with the upper surface of intermediate mold 1 ₃ , and then upper mold 1
₁ , the intermediate mold 1 ₃ and the holding frame 7 descend while compressing each cushion spring 9, and the protrusion 18 of the intermediate mold 1 ₃
c Place the bottom surface against the top surface of the lower mold 1 ₂ . In this way, the compression mold 1 is closed.

There is a first cavity between the upper mold 1 ₁ and the middle mold 1 ₃ .
c ₁ is defined and the molding material is contained within the cavity c ₁ .
Since COM ₁ is heated and flows to fill the first cavity c ₁ , the first molded body m ₁ is compression molded. Further, as shown in FIG. 4A, a predetermined gap _g1 is formed between the tip of the biting convex part 35a of each cam slide 35 and each side of the convex part 16 of the intermediate mold ₁₃ , and the molding material _COM1 is filled in the gap _g1 . flows in, so that the edge f ₁ connected to the first molded body m ₁ is formed. Since each edge f ₁ is formed so as to surround the tip of each biting convex portion 35a, the tip thereof bites into the edge f ₁ . Further, a second cavity _c2 is defined between the lower mold ₁₂ and the intermediate mold ₁₃ , and a second molded body _m2 is compression-molded by the flow of the molding material _COM2 in the same manner as described above. Further, as shown in FIG. 4B, each protrusion 18 of the intermediate mold 1 ₃
A predetermined gap _g2 is formed between the inner surface c and each outer surface of the protrusion 17 of the lower mold ₁₂ , and the molding material is filled in the gap _g2.
As COM ₂ flows in, the edge f ₂ connected to the second molded body m ₂ is formed. In this way, two molded bodies m ₁ and m ₂ are molded simultaneously by the first-stage mold closing operation.

Since the molding materials COM ₁ and COM ₂ contain glass fibers, the molding materials under heating during the above molding process
When COM ₁ and COM ₂ flow, the glass fibers impede the flow of the unsaturated polyester resin, so the molding materials COM ₁ and COM ₂ do not flow smoothly.
As a result, air is likely to be drawn into the molding materials COM ₁ and COM ₂ .

Therefore, during compression molding, the vacuum pump 24 is operated to apply vacuum suction to the first and second cavities c ₁ and c ₂ to prevent air from getting caught in the flowing molding materials COM ₁ and COM ₂ . , second molded body m ₁ ,
Preventing the formation of pores in m ₂ .

The operation of the vacuum pump 24 is stopped, the switching valve 27 is switched to the blower 28 side, and the closed mold state is maintained until both molded bodies m ₁ and m ₂ are semi-hardened. Both molded bodies m ₁ and m ₂ have not yet lost their tackiness in the semi-cured state.

The blower 28 is operated to supply pressurized air to the first and second molds through the airtight chamber 22 of the intermediate mold ₁₃ and each ventilation hole 26.
Inject into cavities c ₁ and c ₂ . The first and second molded bodies m ₁ and m ₂ are released from the intermediate mold 1 ₃ by the pressing action of the pressurized air.

As shown in FIG. 5, the first actuating cylinder ₂₁ is actuated to retract its piston rod ₃₁ , and the upper mold ₁₁ is raised to the position before the molding operation. As a result, the holding frame 7 and the intermediate mold 1 ₃ are moved to each guide pin 8 by the tension force of each cushion spring 9.
It returns to the position before the molding operation where it comes into contact with the enlarged head 8a of. After this mold opening, the operation of the blower 28 is stopped, the switching valve 27 is prepared for the next process, and the vacuum pump 28 is
switch to the side or hold in neutral position.

The tip of the biting convex portion 35a of each cam slide 35 bites into each edge _f1 of the first molded body _m1 , and the engagement of the steel ball 50 and the first engaging recess ₅₃₁ causes each cam slide 35 is held in the forward position, so
The biting state is reliably maintained, and as a result, the first molded body m ₁ remains attached to the upper mold 1 ₁ .
It rises with ₁ . On the other hand, the second molded body m ₂ is released from the intermediate mold 1 ₃ by the pressing action of the pressurized air as described above, and each of its edges f ₂ is attached to each outer surface of the protrusion 17. Since they are in close contact, the lower mold 1 ₂
will be left behind.

The second actuating cylinder ₂₂ is actuated to extend its piston rod ₃₂ and bring the connecting member 14 into the connected state. Then, the second actuating cylinder ₂₂ is operated again to contract the piston rod ₃₂ , and the intermediate mold ₁₃ is slid into the guide frame 11, and the upper and lower molds ₁₁ ,
I will leave between 1 _{and 2} . As the intermediate mold 1 ₃ is removed, the first and second molded bodies m ₁ and m ₂ face each other with the holding frame 7 in between.

As shown in FIG. 6, the first actuating cylinder ₂₁ is actuated to extend its piston rod ₃₁ and lower the upper die ₁₁ . As a result, the end stepped surface 1a of the upper mold ₁₁ comes into contact with the upper surface of the holding frame 7, and further the upper mold 1
₁ and the holding frame 7 descend while compressing each cushion spring 9 to some extent. Further, the second slope 45 ₂ of each cam slide 35 is the slope 4 of each second cam driver 47 _2.
8, each cam slide 35 retreats, and the biting convex portion 35a is inserted into the first molded body as shown in FIG. 6A.
It separates from the edge f ₁ of m ₁ . Each cam slide 35
When the lower surface of the lower mold ₁ comes into contact with the upper surface of the lower mold 1, the upper and lower mold 1
The closed molds of ₁ and 1 ₂ are completed.

In the above closed mold case, the first molded body adheres to the upper mold ₁ .
The second molded body m ₁ and the second molded body _{m 2 attached} to the lower mold 1 2 are polymerized with each other, and both molded bodies m ₁ and m ₂ are joined under heating and completely cured, thereby both molded bodies m ₁ and m ₂ can be accurately polymerized, and a high-quality laminate molded product L without generation of pores can be obtained.

During this heat bonding, the molding material COM ₁ for the first molded body to be used in the next process is applied to the top surface of the convex portion 16 of the intermediate mold 1 ₃ .
is placed (Fig. 7).

As shown in FIG. 7, the first actuating cylinder ₂₁ is operated to contract its piston rod ₃₁ , and the upper mold ₁₁ is raised to the position before the molding operation. In this case, in particular, each edge f ₂ of the second molded body m ₂ is in close contact with each outer surface of the protrusion 17 of the lower mold 1 ₂ , and the second molded body
Since the first molded body m ₁ is joined to m ₂ , the laminated molded body L is reliably left in the lower mold 1 ₂ . As the upper die ₁₁ rises, the holding frame 7 also rises and returns to the above position.

The third actuating cylinder ₂₃ is actuated to extend its piston rod ₃₃ , and each knockout pin 20 is
Make it protrude from the lower mold 1 ₂ . As a result, the laminated molded body L is supported by each knockout pin 20 above the lower mold ₁₂ .

The transfer device 31 is operated to slide the moving rod 32 toward the lower mold ₁₂ , so that each suction cup 33 is opposed to the laminated molded product L. After the laminated molded body L is sucked by each suction cup 33, the moving rod 32 is slid toward the conveyor 29 side, and the laminated molded body L is transferred above the conveyor 29. The suction ability of each suction cup 33 is released, and the laminated molded body L is dropped onto the conveyor 29 and conveyed to a predetermined position. The third actuating cylinder ₂₃ is actuated again to retract its piston rod ₃₃ , thereby forcing each knockout pin 20 into the lower mold ₁₂ .

Both edges f ₁ and f ₂ of the laminate molded body L are removed by trimming, thereby obtaining the laminate molded body L shown in FIG. 1.

As mentioned above, compression molding of the first and second molded bodies m ₁ and m ₂ and polymerization bonding of both molded bodies m ₁ and m ₂ are performed in a series of steps, so mass productivity of the laminated molded body L is good. It is.

In the above embodiment, the upper mold 1 ₁ is raised and lowered relative to the lower mold 1 ₂ to bring the molds 1 ₁ and 1 ₂ into contact with each other, but the lower mold 1 ₂ is raised and lowered relative to the upper mold 1 ₁ . lower the upper mold 1 ₁ and raise the lower mold 1 ₂ at the same time,
Modifications such as arranging both molds 1 ₁ and 1 ₂ on the left and right and moving one or both of them horizontally can be implemented. In addition to the above-mentioned glass fibers, carbon fibers, aramid fibers, etc. are used as reinforcing fibers. Further, as a heating source for the upper mold 1 ₁ , the lower mold 1 ₂ , and the intermediate mold 1 _{3 ,} steam, heated oil, or the like is used in addition to the heaters 19 ₁ to 19 ₃ . Furthermore, the present invention is also applicable to the case where a laminate molded body is manufactured using a molding material that does not contain glass fibers or the like as reinforcing fibers.

C. Effects of the Invention As described above, according to the method of the present invention, an intermediate mold having ventilation holes opened in the first and second molding surfaces facing the first and second cavities, respectively, is used, and the first and second molding In the molding process of the body, vacuum suction is performed in the first and second cavities through the ventilation holes of the intermediate mold, so that the vacuum suction prevents air from being drawn into the fluid molding material in the molding process and spreading. In this case, the formation of pores in the molded product can be effectively prevented, and a high-quality laminate molded product can be obtained. Further, when separating the upper mold and the lower mold from the intermediate mold after the completion of the molding process, pressurized air is blown into the first and second cavities through the ventilation holes to remove the first and second molded bodies. Since the molded bodies are released from the intermediate mold, the first and second molded bodies can be easily released from the intermediate mold by blowing the pressurized air into each cavity. Since it is not necessary to specially provide the intermediate mold with extrusion means such as a knockout pin for mechanically pushing the molded product, the intermediate mold can be made flat and lightweight.

Furthermore, due to the fact that the ventilation holes are opened in the first and second molding surfaces of the intermediate mold, the first and second
The surface of the molded body may have irregularities corresponding to the ventilation holes, but since the surface is the facing surface of the first and second molded bodies, the appearance can be seen from the outside by joining the molded bodies to each other. This is advantageous because it can be well hidden, and therefore, the above-mentioned irregularities do not appear on the outer surface of the laminate molded product as a final product, and there is no need for any special subsequent treatment. Furthermore, since the ventilation holes for vacuum suction and pressurized air blowing for mold release are all set in the middle mold, piping is concentrated and unnecessary compared to when the ventilation holes are provided separately in the upper and lower molds. It is simplified, and only the middle mold among the upper, lower, and middle molds needs to be processed for the ventilation hole and the ventilation path connected to it, so the ventilation hole can be used as an air suction hole for vacuum suction and for mold release. Coupled with the effect that the pressurized air outlet also serves as a pressurized air outlet, the structure of the device as a whole can be simplified, which can greatly contribute to cost reduction.

Further, according to the apparatus of the present invention, in addition to the effect that the method of the present invention can be carried out without any trouble, the attachment mechanism provided on the upper mold allows the first mold to be attached even when the upper mold is separated from the intermediate mold.
An effect is achieved in which the molded body can be accurately held in the upper die against its own weight.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of a laminated molded product, FIG. Figure 2A is a view in the direction of the arrow a in Figure 2, Figure 2B is an enlarged sectional view taken along line b-b in Figure 2A, and Figure 3 is a view in the direction of the arrow 2A in Figure 2.
4 is a vertical sectional view of the main part of the device in the molding process, FIGS. 4A and 4B are partially enlarged views of FIG. 4, and FIG. 5 is the device when the mold is opened after the molding process. FIG. 6 is a vertical cross-sectional view of the main part of the device in the bonding process, FIG. 6A is a partially enlarged view of FIG. 6, and FIG. 7 is a vertical cross-section of the device when the mold is opened after the bonding process. It is a diagram. A ₁ ... Adhesion mechanism, c ₁ , c ₂ ... First and second cavities, L ... Laminated molded product, m ₁ , m ₂ ... First and second molded products, 1 ₁ ... Upper mold, 1 ₂ ... lower mold, 1 ₃ ...
Intermediate mold, 16...Convex portion as first molding surface, 18
...Second molding surface, 24...Vacuum pump as suction pump, 26...Vent hole, 27...Switching valve, 2
8...Blower.

Claims (1)

[Claims] 1. First and second molded bodies m ₁ and m ₂ that are polymerized with each other
In manufacturing the synthetic resin laminate molded product L formed by integrally joining the molds, the intermediate mold 1 ₃ is sandwiched between the opposing surfaces of the upper mold 1 ₁ and the lower mold 1 ₂ that can be approached and separated from each other. , the first molded body m ₁ in a semi-cured state is formed by the first cavity c ₁ defined between the upper mold 1 1 and the intermediate mold 1 ₃ , and the first molded body m ₁ is defined between the lower mold 1 ₂ and the intermediate mold 1 ₃ . _a molding _step of simultaneously compression molding _the second molded bodies m ₂ in a semi-cured state in a second cavity c ₂ ; The molds m ₁ and m ₂ are separated from the intermediate mold 1 ₃ while attached to the molds 1 and ₂ respectively, and
The intermediate mold 1 ₃ is placed between the upper mold 1 ₁ and the lower mold 1 ₂ 〓
The first and second molded bodies m ₁ are separated from the inside,
An intermediate mold removal process in which m ₂ are directly faced; Upper mold 1 ₁
and the first and second molded bodies by closing the gap between the lower mold 1 and ₂ .
In a method for producing a synthetic resin laminate molded body, the method includes sequentially performing a joining step of joining m ₁ and m ₂ in a polymerized state and completely curing;
The intermediate mold 1 3 is used in which ventilation holes 26 are opened in the first and second molding surfaces 16 and 18 facing the first and second cavities c ₁ and c ₂ , respectively, and the intermediate mold _{1 3 is} used in the molding process. Vacuum suction is performed inside the first and second cavities c ₁ and c ₂ through the ventilation holes 26 of the mold, and after the molding process is completed, the upper mold 1 ₁ and the lower mold 1 ₂ are separated from the intermediate mold 1 ₃ . the first and second cavities through the ventilation hole 26 when
Synthetic resin laminate molding, characterized in that the first and second molded bodies m ₁ and m ₂ are released from the intermediate mold 1 ₃ by blowing pressurized air into c ₁ and c ₂ How the body is manufactured. 2 Upper mold 1 ₁ and lower mold 1 ₂ that can approach and separate from each other
and an intermediate mold ₁ 3 that is movable between an operating position sandwiched between the molds 1 ₁ and 1 ₂ and a standby position separated from the opposing gap between the molds 1 1 _{and 1 2} , Upper mold 1 ₁
A first cavity c 1 for compression molding the first molded body m ₁ is provided between the intermediate mold 1 ₃ and a first cavity c ₁ for compression molding the first molded body m ₁ between the lower mold 1 ₂ and the intermediate mold 1 ₃ . The second molded body m ₂ to be compression molded is
Cavities c ₂ are defined respectively, and both molds 1 are attached with the first molded body m ₁ attached to the upper mold 1 ₁ and the second molded body m ₂ attached to the lower mold 1 ₃ respectively.
A synthetic resin laminate molded body, in which the first and _second molded bodies m ₁ and m ₂ are joined in a mutually polymerized state by closing the space between 1 and 1 2 without intervening an intermediate mold 1 _{3 .} In the manufacturing apparatus, the intermediate mold 1
₃ includes first and second molding surfaces 1 facing the first and second cavities c ₁ and c ₂ of the intermediate mold 1 _3, respectively.
6 and 18 are bored, and these ventilation holes 26 are connected to the suction pump 24 via a switching valve 27.
and a blower 28 in parallel, and the upper mold 1 ₁ includes an attachment mechanism A ₁ for attaching the first molded body m ₁ to the upper mold 1 1 when the upper mold 1 1 and the intermediate mold _{1 3} are separated from each other.
1. An apparatus for producing a synthetic resin laminate molded article, characterized in that it is provided with: