JP2001138391A - Method and apparatus for molding resin molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To house a resin molded product part A by accurately positioning the resin molded product part A molded on a resin sheet S irrespective of change of shrinkage percentage of the resin sheet S in a recessed part of a trimming die. SOLUTION: A female mold 1 in which a plurality of cavities 3 are formed, a male mold 2 made freely separable from and contactual to relatively to the female mold 1 opposed to those cavities 3, and a pressure generation means wherein a pressure difference is generated between the female mold 1 side and the male mold 2 side of the cavity by putting a resin sheet S between are provided. On at least one end surface of the mutually opposed end surfaces 1A and 2A of the female mold 1 and the male mold 2, a cutting edge 13 protruding to the other end surface side is intermittently provided in each space between the cavities in a part between the mutually neighbouring cavities 3. Thereby, between resin molded product parts A molded mutually adjacent to each other on the resin sheet S, a cut notch M passing through the resin sheet S is formed without being continued to the cut notch M between that and another resin molded product part A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for molding a resin molded article made of a thermoplastic resin such as polystyrene or polypropylene.

[0002]

2. Description of the Related Art For example, Japanese Patent Application Laid-Open No. 9-48065 discloses a molding method (a female mold) having a cavity and a hot plate (a female plate) facing the cavity. Male mold), the resin sheet sandwiched between these molds and the hot plate is heated and softened by the hot plate, and then the inside of the cavity is evacuated through a plurality of small holes formed in the inner surface of the cavity. By exhausting air between the resin sheet and the inner surface of the cavity and blowing compressed air from the hot plate side, pressure is applied so that the hot plate side is higher than the mold side with the resin sheet interposed in the cavity. It describes that a resin sheet is brought into close contact with an inner surface of a cavity by making a difference to form a predetermined molded product.

Here, when molding a resin molded product that is not so large by such a molding apparatus, a plurality of cavities are formed in one female mold so as to be opened vertically and horizontally on the end face thereof, and many cavities are formed at one time. It is general to mold the resin molded product into a resin sheet. After the molding step, the plurality of resin molded products molded on the resin sheet are provided with a plurality of concave portions capable of accommodating the resin molded product portions in the same manner as the female mold cavity. It is set and positioned in a punching die that is opened at the position, and is sandwiched between a blade die that is relatively detachable from the punching die. Separated from sheet.

[0004]

However, the resin sheet heated and softened during molding as described above shrinks due to cooling after molding, thereby causing the plurality of resin sheets molded on the resin sheet to shrink. When the resin molded product portion is also punched from the resin sheet, the pitch between adjacent resin molded products is smaller than that at the time of molding. This shrinkage is about ten thousandths in terms of ratio, and is small as a pitch between individual resin molded products. However, for example, a resin sheet having a width of 1 m is tens of mm as a whole. If the pitch of the concave portion of the punching die is set to be the same as the pitch of the cavity of the female die of the molding device, the resin molded product set in the punching die will be displaced, and will be located at the periphery of the opening of the molded resin molded product. On the other hand, the cutting edge punched by the blade die is eccentric, and the accuracy as a product is impaired, and in some cases, the resin molded product molded on the resin sheet can not be accommodated in the recess of the punch die I get lost. However, on the other hand, the contraction rate of the resin sheet at the time of punching depends on its material and composition,
It is extremely difficult to set the pitch of the concave part of the die so that the resin molded product is always accurately positioned because it changes slightly depending on the thickness, the temperature at the time of heating, the temperature at the time of punching, the outside temperature, etc. Becomes

The present invention has been made under such a background, and irrespective of the change in the shrinkage of the resin sheet, the resin molded part formed on the resin sheet is accurately placed in the recess of the punching die. It is an object of the present invention to provide a method and an apparatus for molding a resin molded product that can be positioned and accommodated.

[0006]

Means for Solving the Problems In order to solve the above problems and achieve such an object, a molding method of the present invention comprises:
In a method of molding a resin molded article in which a heated and softened resin sheet is brought into close contact with the inner surfaces of a plurality of cavities formed in a female mold and molded into a molded article shape, the resin sheets are molded adjacent to each other on the resin sheet. A cut that penetrates the resin sheet is formed between the resin molded product parts without being continuous with a cut between other resin molded product parts. Therefore, according to such a molding method, the notch formed between the resin molded product portions of the resin sheet causes shrinkage of the resin sheet when the resin molded product portion is punched from the resin sheet. Also, by expanding the cut portion, the pitch between the adjacent resin molded products is adjusted to the pitch between the concave portions of the punching die, and it is possible to accurately position the resin molded product portion.

Further, the molding apparatus of the present invention comprises a female mold having a plurality of cavities formed therein, a male mold facing the cavities and capable of being relatively separated from and connected to the female mold, Pressure generating means for generating a pressure difference between the female mold side and the male mold side of the cavity with a resin sheet sandwiched between the male mold and the male mold, wherein the female mold and the male mold face each other. At least one end face of the end faces is provided with a cutting blade projecting toward the other end face intermittently provided at a portion between the cavities adjacent to each other, between the cavities. The cutting method of the present invention can be carried out by forming a cut between the resin molded product portions of the resin sheet, and the resin sheet is sandwiched between the female mold and the male mold, and at the same time, the cut is made by the cutting blade. Formed Runode, it is efficient. Further, in this molding apparatus, at least the other end face of the female mold and the male mold facing each other is provided with a blade receiving portion formed of an elastic material and contacting the cutting edge of the cutting blade. This allows the cutting edge to be reliably cut into the resin sheet to form the cut, and also prevents the cutting edge of the cutting blade from being chipped.

In the molding apparatus of the present invention, when a pressure difference is generated between the female mold side and the male mold side of the cavity with the resin sheet sandwiched between the female mold and the male mold therebetween. Supplies compressed air to the male side in the same manner as described in JP-A-9-48065 described above.
The female side may perform vacuum suction to exhaust the air in the cavity, and the female side does not perform vacuum suction, but expands the resin sheet with the compressed air supplied to the male side. The air inside the cavity on the female mold side may be pushed out and exhausted by being brought into close contact with the inner surface of the cavity. Further, when sandwiching the resin sheet between the female mold and the male mold, the male mold is fixed and the female mold is moved, or conversely, the female mold is fixed and the male mold is moved. By moving both the male mold and the female mold, the male mold can be moved toward and away from the female mold facing the cavity.

[0009]

1 to 4 show one embodiment of a molding apparatus according to the present invention.
3 shows a female mold 1, and FIGS. 3 and 4 show a male mold 2, respectively. The resin molded product A molded according to the present embodiment
As shown in FIG. 5, a disc-shaped bottom B and this bottom B
A bottomed cylindrical cup-shaped body having a conical surface-shaped body periphery C whose diameter is gradually reduced toward the side.
The bottom B side is formed into a conical surface, and the opening side is formed into a polygonal conical surface. In addition, this trunk circumference C
A cylindrical portion D is formed on the opening side of the cylindrical portion D so as to increase the diameter by one step, and an annular plate-shaped flange portion E is formed on the peripheral edge of the opening portion of the cylindrical portion D so as to spread outward. .

The female mold 1 is attached to a table (not shown) so as to be able to advance and retreat toward the male mold 2 (downward in FIG. 1), and an end face 1 of the female mold 1 facing the male mold 2 side.
A is provided with a cavity 3 so as to be recessed from the end face 1A. The cavity 3 is formed in the resin molded product A
The inner periphery of which is formed of a circular bottom surface 3A, a conical surface whose inner diameter gradually decreases toward the bottom surface 3A, and a polygonal conical surface. Surface 3B, and a cylindrical surface 3C formed so as to increase the diameter of the inner peripheral surface 3B by one step and reaching the end surface 1A.
Further, an annular plate-shaped convex portion 1B slightly protruding from the end surface 1A is formed at the periphery of the opening of the cavity 3 on the end surface 1A where the cylindrical surface 3C is open. The female mold 1 has a plurality of such cavities 3 (20 in this embodiment) as shown in FIG.
The end face 1A is arranged vertically and horizontally (in FIG. 2, 4
(5 laterally).

Here, in the present embodiment, the female mold 1 is configured such that a plurality of blocks 5 of the same number as the cavities 3 are attached to the female mold main body 4 in the form of a box in the same arrangement as the cavities 3. One cavity 3 is formed in each block 5. The block 5 has a flange portion 5A whose outer shape is a square flat plate.
Are formed coaxially at the center of the two square surfaces of the above, and the cavity 3 is formed so as to open at the end face of one of the cylindrical portions 5B, and the periphery of the opening is formed. On the other hand, a concave groove 5D having a wide U-shaped cross section and a pair of seal grooves 5E are formed on the body peripheral portion of the other cylindrical portion 5C. An O-ring 6 is attached to the groove 5E. Further, an opening is further formed in the body peripheral portion of the other columnar portion 5C on the end face side of the columnar portion 5C with respect to the concave groove 5D and the seal groove 5E so as to be flush with the bottom surface 3A of the cavity 3. Slit 7 communicating with the cavity 3
Are formed.

On the other hand, the female die body 4 has a side plate 9 supported by the table attached around a rectangular flat cooling plate 8 having a cooling water passage 8A formed therein as described above. The cooling base 10 is mounted on the cooling plate 8 in the female main body 4, and the block 5 is mounted on the cooling base 10. The cooling base 10 is formed to have a thickness equal to the length of the other columnar portion 5C of the block 5, and the cooling base 10 has a through hole 10A having an inner diameter into which the columnar portion 5C can be inserted. Each of the blocks 5 is formed vertically and horizontally at the same pitch as the length of one side of the flange portion 5A in the same manner as the arrangement of the cavities 3.
0A, the columnar portion 5C is fitted into the columnar portion 5C.
The flange 5A is attached to the cooling base 10 with the end faces of the flanges 5A and the cooling base 10 being in close contact with the cooling plate 8, respectively.

The wall defined between the adjacent through-holes 10A of the cooling base 10 is provided with two rows of through-holes 10A in a "U" -shape as shown in FIG. A horizontal hole 10B extending so as to be connected to is formed. The lateral hole 10B is formed so as to open at the position of the concave groove 5D of the block 5 in the thickness direction of the cooling base 10, as shown in FIG. The annular space defined between the inner peripheral surface and the lateral hole 10B communicates with each other, so that two cooling water passages 10C circulating through the outer periphery of each cavity 3 are provided in the cooling base 10. Are formed for each of the two rows of through holes 10A in the horizontal direction. The cooling plate 8 has a cooling base 10.
From the exhaust hole 1 communicating with the slit 7 of each block 5
1 is formed.

Further, the block 5 attached to the cooling base 10 of the female main body 4 is provided with a through-hole 12 through which the cylindrical portion 5B can be inserted.
A is one of the flange portions 5A, similarly to the through hole 10A.
Plate-like lids 1 arranged vertically and horizontally at the same pitch as the side length
2 is attached to the opening of the box-shaped female main body 4. The lid 12 has a thickness equal to the length of the columnar portion 5B from the flange portion 5A of the block 5, and the block 5 is formed on the end face of the columnar portion 5B. The cylindrical portion 5B is fitted into the through hole 12A by making the portion 1B slightly protrude from the end face of the lid 12 and making the flange portion 5A adhere to the lid 12 so that the columnar portion 5B is inserted into the through hole 12A. The end face of the lid 12 facing the male mold 2 side is the end face 1A of the female mold 1. Then, all the through holes 1 adjacent to each other vertically and horizontally on the end face 1A of the lid 12
The cutting blade 13 is provided between 2A.

The cutting edge 13 is a rectangular flat plate having a tapered cross section of an acute isosceles triangle with a tapered cross section, and has a mounting groove 12 formed in the lid 12 as shown in FIG.
By being implanted in B, the cutting edge is attached so as to project vertically from the end face 1A. In addition, this cutting blade 1
3, the cutting edge length is shorter than the inner diameter of the through hole 12A. As shown in FIG. 2, when viewed from the end face 1A side, such a cutting edge 13 has the center line of each vertically and horizontally adjacent through hole 12A. With respect to a line segment L connecting O, they are arranged so that their midpoints coincide and are orthogonal to the line segment L. Therefore, these cutting blades 13 are arranged on the end face 1 </ b> A such that all the cutting blades 13 are separated from each other without being continuous, and are intermittently provided between the cavities 3.

On the other hand, the male mold 2 shown in FIGS. 3 and 4 is also attached to a table (not shown), facing the cavity 3 of the female mold 1 and facing the female mold 1 (upward in FIG. 3). A side plate 22 supported by the table around a bottom plate 21 having a rectangular flat plate shape.
Is mounted and has a box-shaped male main body 23 that opens toward the female mold 1 side, and a rectangular flat lid 24 is also attached to the opening of the male main body 23. Here, circular openings 25 are formed in the lid 24 so as to be coaxial with the center line O at positions corresponding to the openings of the cavities 3 of the female mold 1. The body 24 has the same number of openings 25 as the cavities 3 of the female mold 1 arranged vertically and horizontally. The inner diameter of the openings 25 is slightly smaller than the inner diameter of the opening of the cavity 3. In addition, an annular concave portion 2B is formed on the end face of the lid 24 facing the female mold 1 side, that is, the end face 2A of the male mold 2 facing the female mold 1 side, at the periphery of the opening of the opening 25. The outer diameter of the concave portion 2B is slightly larger than the outer diameter of the annular convex portion 1B of the female mold 1, and the depth is slightly deeper than the height of the convex portion 1B projecting from the end face 1A. Have been.

Further, in the bottom plate 21 of the male main body 23, through holes 21A are respectively formed around the center line O of each cavity 3, and these through holes 21A are formed.
A, a push rod 27 is inserted into the push rod 27 via a bush 26 so as to be able to advance and retreat and airtightly.
A plug 28 is mounted in the male body 23 at the seven ends. On the other hand, the rear end of each push rod 27 is attached to a flat knockout plate 29 provided between the bottom plate 21 of the male main body 23 and the table, and the knockout plate 29 is provided with an air cylinder or the like (not shown). Of the bottom plate 21, ie, the female mold 1
By moving the plug 28 back and forth, the plug 28 can be made to come into and out of the cavity 3 of the female mold 1 through the opening 25 via the push rod 26.

A stopper bolt 30 is screwed into the knockout plate 29 so as to protrude toward the bottom plate 21, and the stopper bolt 30 comes into contact with the back surface of the bottom plate 21, so that the plug 28 moves forward and backward. The stroke is specified. Also, this knockout plate 29
The stopper bolt 30 and the push rod 26
A cylindrical spring support 31 is protruded so as to avoid the above, and the rear end of the coil spring 32 is loosely inserted on the outer periphery thereof,
Another through hole 21B is formed in the bottom plate 21 on an extension of the center line of the spring support 31, and the bottom plate 21
And a cylindrical spring stopper 3 with a bottom
3 is attached so that the inner peripheral portion thereof faces the through hole 21B so as to close the through hole 21B, and the distal end of the coil spring 32 passes through the through hole 21B and the inner peripheral portion of the spring stopper 33. , Whereby the knockout plate 29 is urged toward the opposite side (the lower side in FIG. 3) from the female mold 1 side. Furthermore, male body 2
The bottom plate 21 is connected to pressure generating means such as a compressed air source (not shown), and compressed air is supplied to a space in the male main body 23 defined by the bottom plate 21, the side plate 22, and the lid 24. A supply hole 34 for supplying is provided.

Further, in the present embodiment, the lid 2
The elastic material is provided between all the opening holes 25 adjacent to each other vertically and horizontally in accordance with the position of the cutting blade 13 provided on the end face 1A of the female mold 1 on the end face 2A facing the female mold 1 side of the female mold 1. A blade receiving portion 35 is provided. In the present embodiment, the blade receiving portion 35 is formed of a rubber material such as Teflon rubber and has a rectangular cross section, and is a concave groove having a “U” cross section formed between the opening holes 25 of the end surface 2A. 36, the width is larger than the thickness of the cutting edge 13 and the length is also larger than the thickness of the cutting edge 1A.
3, as viewed from the end face 2A side of the male die 2, as shown in FIG. 4, a line segment L connecting the center lines O of the adjacent opening holes 25 as in the case of the cutting edge 13. On the other hand, they are arranged so that their midpoints coincide with each other and are orthogonal to the line segment L.

Next, an embodiment of the molding method of the present invention when the above-described resin molded article A is molded by the molding apparatus of the embodiment configured as described above will be described. First, in the present embodiment, a resin sheet S made of a thermoplastic resin such as polystyrene or polypropylene is made of a material,
It is heated to a predetermined moldable temperature based on the thickness, the outside air temperature and the like to soften it, and is arranged between the female mold 1 and the male mold 2.
Next, in a state where the knockout plate 29 of the male mold 2 is retracted and the plug 28 is accommodated in the male body 23, the female mold 1 and the male mold 2 are advanced by the respective tables and approach each other, The resin sheet S is sandwiched between the end surfaces 1A and 2A. At this time, the circular portion of the resin sheet S located on the concave portion 2B formed on the end surface 2A of the male mold 2 is formed by the convex portion 1B of the end surface 1A of the female mold 1 formed in accordance with the position of the concave portion 2B. The flange portion E is formed on the periphery of the opening of the resin molded product A by being recessed and clamped by one step so as to be pushed into the concave portion 2B.

Further, at this time, in a portion between the cavity 3 and the opening hole 25 adjacent to each other, the cutting edge of the cutting blade 13 provided on the end face 1A of the female mold 1 as shown in FIG. The sheet S is cut open and cut into the blade receiving portion 35 provided on the end surface 2A of the male mold 2, whereby a cut penetrating the resin sheet S is formed between all the circular portions adjacent to each other of the resin sheet S. M
Is formed. Here, the notches M are arranged such that the cutting blades 13 are intermittently provided between the cavities 3 without being continuous at the end face 1A. However, the resin sheet S is formed so as to be intermittently interposed between the circular portions with a length shorter than the diameter of the circular portion, so that the cut M does not cause the resin sheet S to be divided and broken.

Next, when the resin sheet S is sandwiched between the female mold 1 and the male mold 2 in this manner, the knockout plate 29 of the male mold 2 is advanced to the female mold 1 side, whereby the push rod 27 is moved. The resin sheet S positioned in the opening of the cavity 3 is pushed into the cavity 3 by projecting the plug 28 from the opening hole 25 through the opening. When the stopper bolt 30 further contacts the back surface of the bottom plate 21 and the protrusion of the plug 28 reaches its stroke end, compressed air is supplied from the supply hole 34 to push the resin into the cavity 3. A pressure difference is generated so that the male mold 2 side in the cavity 3 is higher in pressure than the female mold 1 side in the cavity 3 with the sheet S interposed therebetween.
Is adhered to the inner surface of the cavity 3 to form a resin molded product A having the above-described shape. At this time, the resin sheet S
The air remaining between the cavity 3 and the inner surface of the cavity 3 is exhausted from the slit 7 through the exhaust hole 11. At this time, a vacuum suction means such as a vacuum pump may be connected to the exhaust hole 11 as another pressure generating means to generate a negative pressure on the female mold 1 side in the cavity 3.

Further, the resin molded article A thus formed on the resin sheet S is cooled by the cooling water flowing through the cooling water passages 8A, 10C formed on the cooling plate 8 of the female die 1 and the cooling base 10. After being hardened, the table is retracted to separate the female mold 1 and the male mold 2 from each other, thereby being extracted from the cavity 3 and a plurality of resin molded product A portions are left in a plate shape. After being discharged while being integrated with the resin sheet S, the resin sheet S is cut and punched from the outer periphery of the flange portion E to be provided as a product. However, at the time of this punching, as described above, the resin sheet S is set and positioned in a punching die in which a plurality of recesses capable of accommodating the respective resin molded products A are formed vertically and horizontally like the cavity 3. Then, the outer periphery of the flange portion E is cut by a blade die capable of being separated from and connected to the punching die. In the resin sheet S on which the resin molded product A is formed by the molding apparatus and the molding method of the present embodiment, Since the cuts M are formed between the resin molded products A adjacent to each other, even if the resin sheet S shrinks due to the above-mentioned cooling, the resin molded products A are adjusted to the pitch of the concave portions of the punching die.
The pitch between them can be adjusted.

That is, the resin sheet S according to the present embodiment
Then, even if the pitch between the resin molded products A is reduced due to the contraction due to the cooling, the cuts M formed between the resin molded products A are widened, so that the resin moldings adjacent to each other with the cut M therebetween. The pitch between the products A can be widened and adjusted to match the pitch between the concave portions of the punching die, so that these resin molded products A can be accurately positioned and accommodated in the concave portions of the punching die. This makes it possible to reliably cut the outer peripheral edge of the flange portion E into a coaxial circle without eccentricity with respect to the center line of the resin molded product A. In addition, the amount of adjustment of the pitch between the resin molded products A is such that the cut M is adjusted in accordance with the pitch between the concave portions of the punching die irrespective of the change in shrinkage due to the material and thickness of the resin sheet S and the molding temperature. According to the molding apparatus having the above-described configuration and the molding method using the molding apparatus, all the resin molded products A molded on the resin sheet S can be reliably set in the recesses of the die. , And can be punched at a predetermined position, so that a resin molded product A with higher product accuracy can be provided.

In the above-mentioned molding apparatus, the cutting edge 13 is formed on the end face 1A of the female die 1 in which the cavity 3 is formed, so that the resin sheet S is provided between the female die 1 and the male die 2. Is sandwiched, a cut M is formed between the resin molded products A formed on the resin sheet S by the cavity 3. However, in this regard, in the molding method of the present invention, it is sufficient that the cut M is formed before the resin molded product A is punched out of the resin sheet S by a punching die or the like. Without providing the blade 13, for example, before setting the resin sheet S in the molding apparatus, a cut M was previously formed between the portions where the resin molded product A was molded, or the resin molded product A was molded. It is also possible to form the cut M after the resin sheet S is discharged from the molding apparatus, but in these methods, it is necessary to prepare a means and a step for forming the cut M separately from the molding apparatus. In order to promote more efficient molding work, it is desirable to form the cut M simultaneously with the molding of the resin molded article A by the molding apparatus as in the present embodiment.

Further, in the molding apparatus of the present embodiment, a blade receiving portion made of an elastic material such as Teflon rubber is provided on the end surface 2A of the male die 2 facing the cutting edge 13 of the female die 1 in accordance with the position of the cutting blade 13. When the cut M is formed, the cutting edge of the cutting blade 13 that has penetrated the resin sheet S abuts on the blade receiving portion 35 and is received. The cutting edge 13 is not damaged due to chipping or the like of the cutting edge as in the case of directly contacting the end face 2A, and the cutting is cut into the resin sheet S before the cutting edge contacts the blade receiving portion 35. Thereby, the cut M can be reliably formed in the resin sheet S. In particular, in the present embodiment, the blade receiving portion 35 slightly protrudes from the end surface 2A of the male mold 2 and the resin sheet S
Is the cutting blade 1 in a state in which it is supported in close contact with the blade receiving portion 35.
3, the notch M can be formed more reliably.

In the molding apparatus of this embodiment, the cutting blade 13 is provided on the female die 1 side and the blade receiving portion 3 is provided on the male die 2 side.
5 is provided, but on the contrary, the blade receiving portion 3 is provided on the female mold 1 side.
5 is provided with the cutting blades 13 on the male mold 2 side, respectively, or a part of the cutting blades 13 is provided on the female mold 1 side, and the remaining cutting blades 13 are provided on the male mold 2 side. Alternatively, the blade receiving portions 35 may be provided on the male mold 2 side and the female mold 3 side, that is, the cutting blades 13 may be provided on both the female mold 1 and the male mold 2. Further, in the present embodiment, as shown in FIG.
Are provided so as to extend linearly when viewed from the direction facing the end face 1A of the female mold 1 so that a linear cut M is formed between the resin molded products A of the resin sheet S. Formed in an arc along the periphery of the opening of the resin sheet S, or the resin sheet S between the resin molded products A
The cutting edge 13 may be provided so that the sheet is punched with a predetermined width or shape.

[0028]

As described above, according to the molding method of the present invention, between a plurality of resin molded parts formed on a resin sheet, the cuts between other resin molded parts are continuous with each other. By forming notches that do not
When this resin molded part is punched out of a resin sheet by a punching die or the like, the notch is widened so that the pitch between the resin molded parts is accurately aligned with the pitch between the concave parts of the punching die. It is possible to provide a resin molded product with higher product accuracy. Further, according to the molding apparatus of the present invention, such cuts can be formed at the same time as the molding of the resin molded product portion, so that an efficient molding operation can be promoted.

[Brief description of the drawings]

FIG. 1 shows a female mold 1 showing an embodiment of a molding device of the present invention.
FIG.

FIG. 2 is a view of the female mold 1 shown in FIG. 1 viewed from a direction facing an end face 1A.

FIG. 3 is a male mold 2 showing an embodiment of the molding apparatus of the present invention.
FIG.

4 is a view of the male mold 2 shown in FIG. 3 as viewed from a direction facing an end face 2A thereof.

FIG. 5 is a side sectional view showing a state where a resin sheet S is sandwiched between the female mold 1 shown in FIG. 1 and the male mold 2 shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Female mold 1A End face of female mold 1 2 Male mold 2A End face of male mold 3 Cavity 4 Female main body 11 Exhaust hole 13 Cutting blade 23 Male main body 34 Compressed air supply hole 35 Blade receiver S Resin sheet A Resin molding Product M Notch

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F202 AA11 AA24 AC03 AG07 AH58 AJ05 CA17 CB01 CK84 CK89 CL02 CN01 4F208 AA11 AA24 AC03 AG07 AH58 AJ05 MA02 MA03 MA05 MB01 MC03 MG01 MH06 MH19 MH20 MH20 MH30

Claims (3)

[Claims] 1. A method of molding a resin molded product in which a heated and softened resin sheet is brought into close contact with the inner surfaces of a plurality of cavities formed in a female mold to form a molded product. Forming a cut through the resin sheet between the resin molded product parts to be formed without being continuous with a cut between other resin molded product parts. Method. 2. A female mold having a plurality of cavities formed therein,
A male mold which is relatively opposed to the female mold in opposition to these cavities, and a female sheet side of the cavity with a resin sheet sandwiched between the female mold and the male mold therebetween. Pressure generating means for generating a pressure difference with the male mold side,
At least one end face of the female mold and the male mold facing each other, at a portion between the cavities adjacent to each other, a cutting blade projecting toward the other end face is intermittently interposed between the cavities. A molding device for a resin molded product, which is provided. 3. A blade receiving portion formed of an elastic material and contacting the cutting edge of the cutting blade is provided on at least the other end surface of the female mold and the male mold facing each other. The molding apparatus for a resin molded product according to claim 2, wherein: