JPH0214122A - Continuous press molding device - Google Patents

Abstract

PURPOSE:To manufacture a continuous molded product of uniform thickness all over the whole length and without thin flashes of resin by dividing a top force into a pressing mold and a press mold at least adjacent to the front of the former in a continuous press molding device provided with the top force and a bottom force. CONSTITUTION:A pressing mold 1 of a top force 3 is fixed to an upper section mounting plate 14, while a press mold 2 is hung movably up and down by inserting a bolt 16 hanging down from the upper section mounting plate 14 through a hanging plate 15 at the upper surface of the press mold and fixing by a nut, and pressed always downward by means of a number of compression coil springs 17 installed between said upper section mounting plate 14 and the hanging plate 15. Said press mold 2 is in the position lower than the pressing mold 1. When the upper section mounting plate 14 is lowered and a lowering material is press molded by the pressing mold 1, first the press mold 2 is brought into contact with the press molding material located right below, and relatively lifted up resisting to the resilient force of the springs 17 while pressing the molding material so that the recessed press surface 38 of the press mold 2 and the recessed molding surface of the pressing mold 1 are on the same level to make a space (s) zero.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, synthetic resin rain gutters, U-shaped grooves, pipes,
This invention relates to a device for continuous press forming of long molded products such as flat plates.

(Conventional technology) When obtaining a long molded product by continuous press forming, the third
As shown in Fig. 4, a continuous press molding device 103 is used, which is equipped with an upper mold 101 for press that moves up and down using hydraulic pressure, etc., and a lower mold 102 fixed directly below it, and the mold is softened and melted by heating. A method is adopted in which a synthetic resin sheet 104 made of a different material is intermittently fed between the upper and lower molds 101 and 102 at a predetermined movement pitch, and pressing is repeated by moving the upper mold 101 up and down.

[Problem to be solved by the invention]

However, when continuous press molding is performed using the above-mentioned apparatus 103, as shown in FIG.
The softened molten resin of the synthetic resin sheet 104, which was compressed at 02, is first press-molded and solidified with the front ends of the upper and lower molds 101, 102 by the press pressure.
04a flows out from the gap with the rear end of the press-formed part 10.
There is a problem in that thin resin burrs 105 are formed on both the front and back surfaces of 4a, resulting in poor appearance.

In addition, during pressing, as shown in FIG. 36, the softened molten resin of the synthetic resin sheet 104 also flows out from the rear ends of the upper and lower molds 101, 102 due to the press pressure, so that a raised portion 106 is formed on the trailing portion of the sheet 104. , and this raised part 1
06 is slightly cooled by air during pressing and becomes semi-solid. When the raised portion 106 in a semi-solidified state is formed on the trailing portion of the resin sheet 104, the trailing portion of this sheet 104 is placed in the upper and lower molds 101 as shown in FIG.
．． When the molds 102 and 102 are pressed again, the raised portion 106 gets caught and the gap between the upper and lower molds 101 and 102 becomes slightly wider, and the thickness of the press-formed part increases accordingly, so each time the press is repeated. There is a problem in that the thickness of the molded part gradually increases, making it impossible to obtain a long molded product with a uniform thickness over the entire length.

As a result of various studies, the present inventors have found that, regarding the latter problem of increased thickness, before press-molding the succeeding portion of the synthetic resin sheet 104 in which the raised portion 106 has been formed, the inventors have determined that the raised portion 106 can be sufficiently removed by reheating the subsequent portion of the synthetic resin sheet 104. We have discovered that this problem can be solved by softening and melting. However, there was no solution to the former problem of resin spalling, and it was concluded that it was necessary to improve the continuous press molding equipment in order to solve this problem.

The present invention has been made under the above circumstances, and its object is to provide a continuous press molding apparatus that does not cause resin thinning.

[Means to solve the problem]

In order to achieve such an object, the present invention provides a continuous press molding apparatus equipped with an upper mold and a lower mold, in which the upper mold is
The gist is that the press mold is divided into a press mold and a presser mold adjacent at least in front of the press mold.

[For production]

The apparatus of the present invention having the above configuration uses a short or long synthetic resin sheet as a molding material, and operates as follows to continuously press-form a long molded product.

That is, when using a short molding material such as a synthetic resin sheet, firstly, the short molding material is supplied between the press mold of the upper mold and the lower mold, and the entire upper mold is lowered to form a short sheet. The molding material is press-molded into a predetermined shape using a press mold. Then, the entire upper mold is raised, and this press-formed body is pulled forward so that at least the rear part is located directly under the holding mold, and the next short molding material is supplied between the press mold and the lower mold. do. When the supply is finished, the entire upper mold is lowered, and while pressing and fixing the previous press-formed body with the press mold, the short molding material is press-formed into a predetermined shape with the press mold, and the front end of the short molding material is pressed and fixed. Join it to the rear end of the previous press-formed body. Thereafter, this operation is repeated to press-form the short molding material one after another and simultaneously join it to the previous press-formed body to obtain a long molded product. In this way, when press-forming the next short molding material by pressing and fixing at least the rear part of the previous press-formed body with the presser die, both the front and back sides of the rear part of the previous press-formed body are pressed and fixed by the pressing force of the presser die. Since the presser mold and the lower mold are closely attached and there is no gap, when the next short molding material is press-molded with the press mold, the softened molten resin of the molding material cannot flow out into the gap due to the press pressure. Thin resin flakes are no longer formed.

In addition, when using a long synthetic resin sheet or other molding material, the long molding material is intermittently fed one after another at a predetermined movement pitch between the press mold of the upper mold and the lower mold. The upper mold is moved up and down to press and fix at least the rear part of the press-formed part of the elongate molding material with a presser mold, and the subsequent parts are press-molded one after another with the press mold to form the elongate material. get goods. In this case as well, due to the pressing force of the presser die, both the front and back surfaces of the previously press-molded part come into close contact with the presser die and the lower die, eliminating any gaps, so that thin resin flakes are not formed.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a perspective view of the main parts of a continuous press molding device according to an embodiment of the present invention, Fig. 2 is a side view of the main parts of the same machine showing the upper mold in cross section, and Fig. 3 is a rear end cutout section. 4 is an explanatory diagram of a manufacturing line for long molded products incorporating the same device, and FIG. 5 is an explanatory diagram of the mold operation of the same device. .

As shown in FIG. 4, this continuous press molding device D1 is
It is equipped with an upper mold 3 divided into two parts: a press mold 1 and a presser mold 2 adjacent to the front thereof, and a lower mold 4 located directly below the upper mold 3. is attached via an upper mounting plate 14 to a lifting drive mechanism 6 containing a hydraulic cylinder etc., and the lower mold 4 is fixed onto a base 5 via a lower mounting plate 7.

The upper mold 3 and the lower mold 4 of this embodiment are molds for press-molding a long molded product having a substantially U-shaped cross section, such as a U-shaped groove or a rain gutter. As shown in FIG. 3, a convex molding surface 36 is formed in the widthwise center of the lower mold 4 and is raised in a substantially trapezoidal shape, and the press mold l and the presser foot of the upper mold correspond to this. A concave molding surface 37 recessed into a substantially trapezoidal shape and a concave pressing surface 38 are formed in the widthwise central portion of the mold 2 .

Along the rear edge, in the center, and near the front edge of the convex molding surface 36 of the lower mold 4, there are small rib forming grooves 8 and large rib forming grooves 9, respectively.
, positioning grooves 10 identical to the large rib molding grooves 9 are recessed at equal intervals, and inside the lower mold 4, a lifting plate 1 is provided.
) is equipped with a plurality of large and small eject pins (or eject pieces) 12 and 13 for demolding. These eject pins 12 and 13 are designed to move in and out of the convex molding surface 36 of the lower mold 4 as the elevating plate 1) moves up and down.

The press mold 1 of the upper mold 3 is fixed to the upper mounting plate 14, and the presser mold 2 is made into a Nando by inserting bolts 16 hanging from the upper mounting plate 14 into the hanging plate 15 on the upper surface thereof. As a result, it is suspended so as to be movable up and down, and is constantly pressed downward by a large number of compression coil springs 17 interposed between the upper mounting plate 14 and the suspension plate 15. This presser die 2 is located at a lower position than the press die 1,
The difference in height between the two is determined by the spacer 18 on the bottom surface of the upper mounting plate 14.
and the hanging plate 15 on the upper surface of the presser die 2 is set to be equal to the gap S. Therefore, as will be described later, when lowering the upper mounting plate 14 and press-molding a molding material with the press mold 1, the presser mold 2 first comes into contact with the press-formed body located directly below it, and the molding material is pressed. While pressing the body, it rises relatively against the elastic force of the spring 17, and the concave pressing surface 3B of the presser die 2 and the concave molding surface of the press die l become flush, and the gap 3 becomes zero. Become. The coil spring 17 is inserted into the spring insertion hole 1 bored in the spacer 18.
Both ends of the spring are inserted into the spring insertion holes 20 drilled in the spring 9 and the suspension plate 15 to install the spring, but in order to prevent the coil spring 17 from falling or breaking, eight additional rods are inserted into the coil spring 17. may be configured.

There are guide pins 2 at the four corners of this press die l and presser die 2.
1 protrudes downward, and correspondingly,
Pin insertion holes 22 are formed in both side edges 40, 40 of the lower mold 4. Therefore, the press mold 1 and the presser mold 2 can be moved up and down in the horizontal direction without wobbling.

Also, along the rear edge of the concave molding surface 37 of the press mold 1,
Near the front edge of the concave pressing surface 38 of the presser die 2, a small rib forming groove 23 corresponding to the small rib forming groove 8 of the lower die 4 and a positioning groove 25 corresponding to the positioning groove 10 of the lower die 4 are provided. Further, at the front end edge of the concave molding surface 37 and the rear end edge of the concave pressing surface 38, a quarter-circular notch groove 24a,
24b is provided. These notch grooves 24a and 24b merge with each other during press molding when the concave molding surface 37 of the press mold 1 and the concave pressing surface 38 of the presser mold 2 are flush with each other, and the large rib molding grooves 9 of the lower mold 4 merge with each other. A corresponding large rib forming groove 24 is formed (see FIG. 5(E)).

Further, a cut-out portion 27 with a built-in hole 26 is provided at the rear end of the press mold 1, and a cut-out receiving portion 28 for receiving the cut-out portion 27 is provided.
is provided at the rear end of the lower mold 4. Therefore, during press molding, the cutout portion 27 prevents the softened molten resin of the molding material from flowing backward, and the heater 26
The rear end of the press-formed body is kept warm by this.

The side edges 39, 39 of the press mold 1 serve as cutouts to prevent the softened molten resin from flowing out to both sides during press molding, and the side edges 40, 40 of the lower mold 4 serve as cutouts to prevent the softened molten resin from flowing out to both sides during press molding. Needless to say, it will be the Kikiri Uke section.

The continuous press molding apparatus D1 configured as described above is used, for example, by being incorporated into a manufacturing line for long molded products as shown in FIG. This production line includes a cutting machine 29,
Material supply machines 30, 33, conveyor belt 31, heating furnace 32,
It is equipped with a continuous press molding device 0, a take-up roll 34, a molded product cutting machine 35, etc. First, a long molding material such as a long synthetic resin sheet S is cut into a predetermined size by the cutting machine 29, and then The cut short molding material X is delivered to the material feeder 3
The material is supplied to a conveyor belt 31 at 0, is heated to a softening and melting temperature while passing through a heating furnace 32, and is fed into a continuous press molding device one after another by a material feeder 33. The continuous press molding device operates as described later to continuously press mold the short molding material The molded product cutting machine 35 cuts the product into predetermined product dimensions.

The molding material used here only needs to have a certain degree of fluidity during press molding, and therefore, PVC and other various molding plastic material sheets, SMC (sheet molding compound), etc. can be used. However, when obtaining a long molded product with high strength, it is desirable to use a glass fiber-containing sheet. Suitable glass fiber-containing sheets include polypropylene, polycarbonate, polyethylene, and polyethylene having a softened melt viscosity of 100,000 poise or less. Polystyrene, polyethylene terephthalate, nylon, acrylic, polybutylene terephthalate,
A thermoplastic resin layer made of polyphenylene sulfide or an alloy thereof, and a mat of long glass fibers with an average fiber length of 10 mm or more (preferably a mat made by stacking continuous spiral long glass fibers, such as a mat made by Asahi Fiberglass). "Glaslon Continuous Strand Mat" etc.) sheets with a structure of three or more layers laminated alternately, sheets with a breathable structure made by combining 7 to 50 mm glass fiber and granular or powdered plastic material, etc. can be mentioned. The former sheet has the advantage that the thermoplastic resin layer is made of a resin with a low softening melt viscosity, so it has the advantage of excellent weldability with the previous molded product during press molding and high strength, while the latter sheet has the advantage of high strength. Structured sheets have the advantage of excellent moldability, and both are extremely preferable for obtaining long molded products by continuous press molding.

Next, we will explain the operation of this continuous press molding device in the fifth section.
To explain with reference to the figure, first, with the entire upper die 3 raised as shown in Fig. 5(a), the heated initial molding material X is applied to the press die 1 and the lower die 4. supplied in between.

When the molding material X is supplied, the entire upper die 3 is lowered by the above-mentioned elevating drive mechanism 6, and the press die 1 continues to descend even after the presser die 2 is closed, as shown in FIG. 5(B). Then, as shown in FIG. 5(c), the molding material X is pressed using the concave molding surface 37 to form a substantially U-shaped cross-sectional shape. When press-molded in this way, small ribs 41 and 42 that protrude vertically by the small lip forming grooves 23 and 8 are formed at the rear end of the molding material X, and the large rib forming groove 9 and notch grooves 24a and 2
4b, a large lip 44 projecting downward and a large lip 43° in the shape of an Ushiku angle projecting upward are molded on the front end of the molding material X. During press molding, the softened molten resin of the molding material blocked by both side edges 39.39 of mold 1;
Since outflow to the front is prevented by the presser die 2, no outflow occurs.

When the first press molding is completed and the entire upper mold 3 is raised by the lifting drive device as shown in FIG. After fitting the large lip 44 into the positioning groove 10 of the lower mold 4 and positioning it, the next heated molding material
A is supplied between the press die 1 and the lower die 4. When the large rib 44 is fitted into the positioning groove 1o as described above to position the Fuss molded body It becomes possible to accurately position the large rib molding groove 9 so that it is located exactly on the center line of No. 4.

When the second molding material x2 is supplied, the entire upper mold 3 is lowered again by the elevating drive mechanism, and as shown in FIG. After firmly pressing and fixing the previous molded body X, the press mold 1 is pressed with the molding material X.

is pressed to form a substantially U-shaped cross section. When press-forming is performed in this way, the small ribs 41 that protrude vertically by the small-rib forming grooves 23 and 8 are formed as in the case of the first press-forming.
．． 42 is molded on the rear end of the molding material x. At the same time,
The softened molten resin of the molding material xt is applied to the gap between the large rib forming groove 24 where the notched grooves 24a and 24b are combined and the small rib 41 at the rear end of the press-formed body X, and the large rib of the lower mold. Groove 9 and the small rib 42 at the rear end of the press-formed body X
Large ribs 43 and 44 that flow into the gaps between the small ribs 41 and 42 and hold the small ribs 41 and 42 from above and below are molded on the front end of the molding material x3, and the two are fused together in a mechanically secured state. It will be worn. This fusion will be incomplete or almost no fusion will occur when a synthetic resin sheet with a high softened melt viscosity is used as the molding material, but as mentioned above, the softened melt viscosity of the resin is When using a synthetic resin sheet containing glass fiber with a low poise or less, it will be sufficiently fused.
Coupled with the joining structure in which the small ribs 41.42 and the large ribs 43.44 are mechanically engaged, a satisfactory joining strength can be obtained. In particular, with this continuous press molding equipment,
The heater 26 built into the rear end cutout 27 keeps the small ribs 41 and 42 at the rear end of the press-formed body X warm until just before they are moved forward, reducing the temperature drop.
The fusion properties are good.

In addition, during this press molding, the softened molten resin of the molding material Since both the front and back sides of the presser die 2 and lower die 4 are in close contact with the presser die 2 and the lower die 4, leakage to the rear and both sides is reliably prevented, and as in the case of the first press molding, the rear end of the press die 1 The cutout part 27 and both side edges 3 of the press die 1
It will definitely be stopped on 9.39. Therefore, thin flakes of the outflowing resin do not occur on the front and back surfaces of the rear part of the press-formed body X, and the molding material x8 is molded into a press-formed body having a predetermined thickness and a substantially U-shaped cross section.

During this press molding, the previous press molded body X is pushed forward by the resin pressure of the molding material x8, but as described above, the large rib 44 of the previous press molded body X is inserted into the positioning groove 1.
0 and is pressed from above with the presser die 2 so that it does not come out, so the press-formed body X does not move forward at all. Therefore, the small lips 41 and 42 at the rear end of the press-formed body This small rib 41 is located on the center line of the large rib forming groove 9.24 as determined and does not deviate forward.
．． There is no fear that the engagement between the large ribs 43 and 44 at the front end of the molding material X will be incomplete, resulting in a decrease in joint strength.

When press molding of molding material X is completed, the entire upper mold 3 rises as shown in FIG.
t is pulled forward and positioned in the same manner as described above, and the next heated molding material X is supplied between the press mold 1 and the lower mold 4.

Thereafter, by repeating the above-mentioned operations, the molding material is press-molded one after another and joined to the previous press-formed body, and a long molded article A having a substantially U-shaped cross-section is continuously manufactured.

As shown in FIG. 6, the long molded product A thus obtained is formed into individual press molded products X, X, , x, .・・・
Since the ribs 41 and 4 are integrally joined, the joint strength, especially the tensile strength in the longitudinal direction, is high.
Since the 2.43.44 serves as reinforcing ribs, the mechanical strength is also high. In addition, since the outflow of the softened molten resin of the molding material during press molding is prevented, this long molded product A has a beautiful appearance without any thin particles of resin flowing out, and each of the press molded products X, Xt, X3, . . . has a substantially constant thickness over its entire length.

The continuous press molding apparatus DI of this embodiment has a structure in which the presser die 2 is pressed by the coil spring 17 as described above, and the press die 1 and the presser die 2 are interlocked by a single lifting drive mechanism 6. Since the device is configured to move up and down by moving the press die 1 and the presser die 2, it has the advantage that the entire device is not complicated and the operation can be easily controlled. This continuous press molding device may be configured to move up and down independently by a mechanism, and includes small rib forming grooves 8 and 23, large lip forming grooves 9, notch grooves 24a and 24b, and positioning groove 10. Since .25 is provided, each press molded body x, xt,
It is possible to obtain a long molded product A with a high bonding strength between x, . However, these grooves are not essential (and may be omitted.

FIG. 7 is a cross-sectional view of essential parts showing the mold operation of a continuous press molding apparatus according to a second embodiment of the present invention, which shows the press mold l of the upper mold 3 divided into two parts and the press mold l and the presser mold. 2 are configured to be raised and lowered independently by separate raising and lowering drive mechanisms 6a and 6b. The molding surfaces 37 of this press mold 1 and lower mold 4
．． 36 is a flat surface so that a flat plate-like elongated molded product can be obtained, and similarly, the pressing surface 38 of the presser die 2 is also a flat surface. A notch 27° 39 is provided along the rear edge and along both side edges of the molding surface 37 of the press mold 1 to protrude downward, and correspondingly, the molding surface 36 of the lower mold 4 There are cutout receiving parts 28 along the rear edge and along both side edges.
．． 40 is formed in a concave step shape. Although not shown in the figure, side wall portions similar to the above-mentioned cutout portions 39 are also formed along both side edges of the pressing surface 38 of the presser die 2.

When obtaining a flat long molded product using the continuous press molding apparatus equipped with the upper mold 3 and the lower mold 4 as described above, the press molded product
is moved forward as shown in FIG. 7(a), and the rear part of the molded body X is pressed and fixed with the presser mold 2, and then the next molding material As shown in FIG. 7(b), the molding material All you have to do is repeat the operation of joining them together.

In the case of this continuous press molding device as well, the pressing force of the presser die 2 causes both the front and back surfaces of the previous press molded body X to be brought into close contact with the presser die 2 and the lower die 4 without any gaps, and then the next molding material xt is pressed. Since the molding is performed, the softened molten resin of the molding material x2 will not flow forward due to press pressure and cause thin resin flakes on both the front and back surfaces of the press-formed body X, and will not flow backward or to both sides. Since it is blocked by the cutout portions 27 and 39, the molding material x2 is press-molded into a flat plate having a constant thickness. Therefore, it is possible to obtain a beautiful flat plate-like long molded product that has a substantially uniform thickness over its entire length and is free from thin flakes.

When the press die 1 and the presser die 2 are configured to be moved up and down by separate lifting drive mechanisms 6a and 6b as in the apparatus of the second embodiment, the advantage is that the pressing force of the presser die 2 can be freely adjusted. There is.

FIG. 8 is a rear view of essential parts of a continuous press molding apparatus according to a third embodiment of the present invention, and FIG. 9 is an explanatory view of the mold operation of the same apparatus, showing the upper mold 3 and the lower mold of this apparatus. The mold 4 differs from that of the first embodiment in the following points. That is, one of the differences is that the molding surfaces 36 and 37 of the press mold 1 and the lower mold 4 are flat surfaces in order to obtain a flat plate-like long molded product containing a reinforcing wire, and the press mold 2 is adjusted accordingly. The pressing surface 38 is also a flat surface. Another difference is that along the upper edge of the cut-out part 27 at the rear end of the press mold l, there are a plurality of wire supply holes for supplying reinforcing wire y. 45 are provided at equal intervals. The wire supply hole 45 is formed so as to pass through the back side of the cutout portion 27 and reach the rear end of the molding surface 37 of the press die 1 . Since the other configurations are substantially the same as those of the first embodiment, corresponding symbols are attached to each member and explanation thereof will be omitted. Although not shown in FIGS. 8 and 9, a cutout part and a cutout receiving part are provided along both side edges of the press die 1 and the lower die 4, respectively, and the presser die 2 has a cutout part and a cutout receiving part, respectively. Side wall portions similar to the cut-out portions are also provided along both side edges.

When obtaining a flat plate-like long molded product containing a reinforcing wire using a continuous press molding apparatus equipped with the upper mold 3 and lower mold 4 as described above, first the upper mold is The entire mold 3 is raised by a single lifting drive mechanism (not shown),
The heated first short molding material are supplied from each wire supply hole 45 and placed on the molding material X in a parallel state.

Next, the entire upper mold 3 is lowered, and as shown in FIG. 9 (b), the presser mold 2 is closed, and the molding material At the same time as X is formed into a flat plate shape, a reinforcing wire y is embedded in its surface layer.At this time, the softened molten resin of the molding material X tries to flow out due to the press pressure, but the forward flow is prevented by the presser mold 2. Since outflow to both sides is prevented by the notches on both sides of the press mold 1, and outflow to the rear is prevented by the notches 27 at the rear end of the press mold, there is no resin outflow, and therefore the molding Material X is press-molded into a flat plate with a predetermined thickness. Moreover, during this press molding, since the reinforcing wire rod y is drawn out to the outside of the mold through the wire rod supply hole 45, the reinforcing wire rod y is drawn out from the cutout part 27 at the rear end of the press mold 1.
It will not be disconnected.

When the first press molding of molding material X is completed, Fig. 9 (c)
As shown in FIG.
The first press-formed body X is moved forward while supplying the reinforcing wire y through the reinforcing wire y, and the next molding material xt is supplied between the reinforcing wire y and the lower mold 4. Then, the entire upper mold 3 is lowered again, and as shown in FIG. 9(d), the press-formed body X is pressed and fixed with the presser mold 2, and the reinforcing wire y and the molding material The molding material xt is pressed into a flat plate shape with the mold 1, and the reinforcing wire y is embedded in its surface layer, and the front end of the molding material x2 is butted against the rear end of the previously press-formed body X. Weld them together to form a single piece. At this time, the softened molten resin of the molding material
There is no gap between the front and back sides of the presser die 2 and the lower die 4 (because they are in close contact with each other, it is reliably prevented, and leakage to the rear and both sides is also prevented.
As in the case of the first press molding, it is reliably blocked by the cutout part 27 at the rear end of the press mold 1 and the cutout parts on both sides. Therefore,
The molding material xt can be press-molded into a flat plate shape of a predetermined thickness without producing thin resin flakes on the front and back surfaces of the rear part of the press-formed body X.

Thereafter, by repeating the above operations, the molding material and the reinforcing wire are successively press-molded and joined to the previous press-formed body, thereby obtaining a flat plate-like elongated molded product containing the reinforcing wire.

The long molded product obtained in this way has a nearly uniform thickness over its entire length, is beautiful with no resin flakes, and has multiple reinforcing wires embedded in the surface layer of the molded product over its entire length. Therefore, the bonding strength, especially the tensile strength, between the press-formed bodies is high.

In the above embodiment, the wire supply hole 45 is cut out by the cutout part 27.
If provided in the middle, reinforcing wire y such as a metal wire that is difficult to bend can be smoothly supplied, and if rib forming grooves and positioning grooves are provided in the upper mold 3 and lower mold 4, ribbed It is also possible to obtain long molded products.

FIG. 10 is a rear view of essential parts of a continuous press molding apparatus according to a fourth embodiment of the present invention, and FIG. The lower mold 4 differs from that of the first embodiment in the following points. That is, one of the differences is that in order to obtain a ribbed flat plate-like long molded product laminated with a coating film, the molding surfaces 37 and 36 of the press mold 1 and the lower mold 4 and the press mold 2 are Pressing surface 38
are all flat surfaces, and small rib molding grooves 8 are provided along the rear edge, in the center, and near the front edge of the molding surface 36 of the lower mold 4, respectively.
In addition to providing large rib forming grooves 9 and positioning grooves 10 at equal intervals, small rib forming grooves 23 and notch grooves 2 are provided along the front and rear edges of the forming surface 37 of the press die 1 in correspondence with these grooves.
4a, and a notch groove 24b and a positioning groove 25 are provided along the rear edge and near the front edge of the molding surface 28 of the presser die 2, respectively. Another difference is that the small rib forming groove 23 starts from the part along the upper edge of the cutout 27 at the rear end of the press die 1
, and a film supply slit 47 that leads from a portion along the lower edge of the cut-out receiver 28 at the rear end of the lower mold 4 to a portion along the front edge of the small rib forming groove 8. This is what we have set up. Since the other configurations are substantially the same as those of the first embodiment, corresponding symbols are attached to each member and explanation thereof will be omitted. Although not shown in Figures 10 to 1), a cutout part and a cutout receiving part are provided along both side edges of the press die 1 and the lower die 4, respectively.
Further, side wall portions similar to the cutout portions are provided along both side edges of the presser die 2.

When obtaining a ribbed flat plate-like long molded product laminated with a covering film using a continuous press molding apparatus equipped with the upper mold 3 and lower mold 4 as described above, first, the molded product shown in FIG.
As shown in b), the entire upper mold 3 is moved by a single elevating drive mechanism (
(not shown), and feed the upper and lower two covering films z and z from the film supply slits 46.47 between the press mold 1 and the lower mold 40, and the heated first short molding material X. Supplied and sandwiched between upper and lower films 2゜2. As the covering films z and z, various plastic films that are compatible with the resin of the molding material suitable.

Next, the entire upper mold 3 is lowered, and as shown in Figure 1) (B), after closing the presser mold 2, the molding material , the molding material X is molded into a flat plate shape, and at the same time coating films Z, Z are laminated on both the front and back surfaces thereof. At this time, the small ribs 41.42 protrude vertically by the small rib forming groove 23°8.
is formed on the rear end of the molding material In addition, during this press molding, the softened molten resin of the molding material 1. Since the outflow to the rear is prevented by the notches 27 on both sides of the press mold 1, the resin does not flow out, and therefore the molding material X is formed into a ribbed flat plate of a predetermined thickness. The covering films z and z are drawn out of the mold through the film supply slits 1-46 and 47, so during this press molding, the films z and z are pressed after the press mold 1. There is no need to worry about it being cut off by the notch 27 at the end.

When the press molding of the first molding material X is completed, Fig. 1) (
As shown in c), the entire upper mold 3 is raised, and the first press-formed body X is moved forward while supplying the covering films z and z from the film supply slits 46 and 47, and the large rib 44 at the front end is moved forward. After fitting into the positioning groove 10 and positioning, the next molding material Xfi is applied to the upper and lower covering films z.
, z.

Then, the entire upper mold 3 is lowered again, and as shown in FIG. 9(d), the press molded body X is pressed and fixed by the presser mold 2, and the molding material xt and the covering film 2.2 are sealed. The molding material xt is pressed into a flat plate shape by pressing it together with a press mold l, and at the same time, the covering film 2.2 is laminated on the front and back surfaces of the molding material xt.

When press-forming is performed in this manner, small ribs 41 and 42 that protrude vertically by the small lip-forming grooves 23 and 8 are formed on the rear end of the molding material xtO, as in the case of the first press-forming.

At the same time, molding material X! Notch grooves 24a, 2 are provided at the front end of the
The small rib 41 at the rear end of the press-formed body
．． Large ribs 43 and 44 are molded to hold 42 from above and below, and the two are fused and joined together in a state in which they are mechanically engaged with each other. In that case, if the covering film 2.2 is rolled up between the large ribs 43.44 and the small ribs 41.42, both ribs will not be fused to each other, resulting in a decrease in bonding strength. In this case, the film supply slits 46 and 47 are provided so as to communicate along the front edges of the small rib forming grooves 23 and 8, so that when the first molding material X is press-molded, the covering films z and z are
We took measures to prevent the small ribs 41, 42 at the rear end from being laminated, and when press-molding the next molding material x8, the small ribs 41, 42 at the rear end of the previous press-formed body Molding material x3 between ゜2
Since the softened molten resin flows in and molds the large ribs 43, 44, there is no concern that the covering films z and z will get caught up in the molding material xt. The softened molten resin of x8 tries to flow out due to the press pressure, but the forward flow is blocked by the covering films z, z and the holding mold 2, and the backward and both sides of the resin are prevented from flowing out after the press mold 1. It is blocked by the notched portion 27 at the end and the notched portions on both sides. Therefore, the previous press-formed body
The molding material x8 can be press-molded into a ribbed flat plate of a predetermined thickness without producing thin resin flakes on the front and back surfaces of the rear part.

Thereafter, by repeating the above operations, the molding material and the covering film are press-molded one after another and joined to the previous press-formed body, creating a ribbed flat plate-like long molded product with the covering film laminated on both the front and back sides. obtain.

The long molded product obtained in this way has a substantially uniform thickness over its entire length, and has high joint strength because each press molded product is joined with a joining structure by engagement and fusion of large ribs and small ribs. Moreover, since there is no resin flakiness and the front and back surfaces are laminated with a covering film such as an acrylic resin film or a decorative film, the weather resistance and appearance are excellent. In addition, when laminating a covering film only on one side of a long molded product, for example, a molding device provided with a film supply slit only on the press mold 1 side may be used.

FIG. 12 is an explanatory diagram of the mold operation of a continuous press molding device according to a fifth embodiment of the present invention, and FIG. 13 is an explanatory diagram of a manufacturing line for long molded products incorporating the same device. The upper mold 3 and lower mold 4 of the continuous press molding apparatus are different from those of the first embodiment in the following points. That is, one of the differences is that the molding surfaces 37 and 36 of the press mold 1 and the lower mold 4 are flat surfaces in order to obtain a flat plate-shaped long molded product, and the pressing surface of the presser mold 2 is changed accordingly. 38 is also a flat surface, and another difference is that the cutout part 2 at the rear end of the press die l
7 and the cutout receiving part 28 at the rear end of the lower mold 4 are not provided, but a preliminary pressing convex part 48 is provided downwardly protruding along the rear edge of the molding surface 37 of the press mold 1, and a preliminary pressing part 48 facing this is provided. The pressing convex portion 49 is provided to protrude upward along the rear edge of the molding surface 36 of the lower mold 4. Since the other configurations are substantially the same as those of the first embodiment, corresponding symbols are attached to each member and explanation thereof will be omitted. Although not shown in FIGS. 12 and 13, a cut-out part and a cut-out receiving part are provided along both side edges of the press die 1 and the lower die 4, respectively, and the press die 2 has a cut-out part and a cut-out receiving part, respectively. Side wall portions similar to the cut-out portions are also provided along both side edges.

Such a continuous press molding apparatus DB is used by being incorporated into a manufacturing line for long molded products as shown in FIG. 13, for example. This manufacturing line is equipped with a material supply roll 50, a conveyor belt 31, a heating furnace 32, a continuous press molding device Ds, a take-up roll 34, a molded product cutting machine 35, etc. According to this, the material supply roll 50 A long molding material zfJ is fed out from the conveyor belt 31 and transferred to the heating furnace 32.
While passing through, it is heated to a softening and melting temperature, and is intermittently fed into a continuous press molding device between an upper mold 3 and a lower mold 4 at a predetermined feed pitch, and press-molded one after another. Then, the formed flat plate-like long molded product A is intermittently taken up by a take-up roll 34, and finally cut into a predetermined product size by a molded product cutter 35 to become a product.

This continuous press molding apparatus DS operates as shown in FIG. 12 to continuously press mold a flat plate-like elongated molded product from the elongated molding material X.

First, when the entire upper mold 3 is lowered by the lifting drive mechanism from the raised position shown in FIG. 12 (a) to the intermediate position shown in FIG. 12 (b) and the presser mold 2 is closed, the heated molding material is sent between the press die 1 and the lower die 4. Then,
As shown in FIG. 12 (c), the press die 1 is lowered a little, and the part of the molding material X located at the rear end of the die is the press die 1.
and respective preliminary press convex portions 48 and 49 of the lower mold 4.
is pre-pressed, and that part is cooled to become a thin-walled part 51 in a semi-solidified state.

When the preliminary pressing is finished, the press mold 1 is further lowered slightly as shown in FIG. 12(d), and the molding material X is actually pressed and formed into a flat plate shape. At this time, the softened molten resin of the molding material Since the outflow to the rear is blocked by the thin wall portion 51 in a semi-solidified state,
It is press-molded into a flat plate of a predetermined thickness without any leakage. It goes without saying that this thin wall portion 51 is completely solidified by this pressing.

When the main press is finished, the entire upper mold 3 rises as shown in FIG. 12 (e), the first press-formed part X of the molding material and the lower mold 4. Then, the 12th
As shown in the figure, the entire upper mold 3 is lowered again, and the press-formed part X is first pressed and fixed by the presser mold 2.
Subsequently, a portion of the molding material X located at the rear end of the mold is pre-pressed by the pre-press convex portions 48 and 49 to form the second thin-walled portion 51 in a semi-solidified state.

After the thin wall portion 51 is formed by preliminary pressing, the press mold 1 is further lowered slightly as shown in FIG. At this time, the softened molten resin of the molding material
Since it flows into the gap between the thin wall portion 51 of the previous press molded part The thickness is the same as that of the press-formed part X. In addition, during this main press molding, both the front and back sides of the previous press molded part
Since the softened molten resin is in close contact with the press die 1 without any gaps, the softened molten resin does not flow out to the front, and the outflow to both sides and the rear is prevented by the cutout portions on both sides of the press mold 1 and the second thin wall portion 51 in a semi-solidified state. thwarted. Therefore, the molding material X can be press-molded into a flat plate of a predetermined thickness without causing thin patches of outflowing resin on the front and back surfaces of the press-molded portion X.

Thereafter, by repeating the feeding of the molding material shown in Fig. 12 (E), the preliminary press shown in Fig. 12 (F), and the main press forming shown in Fig. 12 (G), a flat plate-like long molded product is continuously pressed. Shape.

The long molded product obtained in this way is beautiful without any resin flakes, and has high tensile strength because the long molding material is continuously press-molded without cutting.

Furthermore, by means of the pre-press convex portions 48 and 49 provided on the press die 1 and the lower die 4, the portion of the molding material located at the rear end of the die is made into a semi-solidified thin wall portion 51 before main press molding, This thin part 51 prevents the softened molten resin from flowing backward during main press molding and prevents the flowing resin from forming a bulge, so that the thickness of the long molded product is approximately uniform over the entire length.
Therefore, the thickness does not gradually increase like conventional products.

FIG. 14 is an explanatory diagram of the mold operation of the continuous press molding apparatus according to the sixth embodiment of the present invention, and is an explanatory diagram of the upper mold 3 of this apparatus.
is a press die 1 in the center and a presser die 2 adjacent to the front.
and a cooling mold 52 adjacent to the rear. This cooling mold 52 is vertically movably suspended on the upper mounting plate 14 in the same way as the presser mold 2.
A coil spring 53 is interposed between the cooling mold 52 and the cooling mold 52 . Then, as shown in FIG. 14(B), when the press molding die 2 presses and fixes the press-molded part X at the tip of the molding material It is adjusted so that it contacts the located portion 54 in a pressureless state and only performs cooling. Further, the rear end edge of the molding surface 37 of the press mold 1 and the rear end edge of the molding surface 36 of the lower mold 4 are
All of them are flat and are not provided with the preliminary press protrusions 48 and 49 as described above. The rest of the configuration is substantially the same as the device of the fifth embodiment, so a description thereof will be omitted.

According to such a continuous press molding apparatus, as shown in FIG. 14(A), while the entire upper mold 3 is raised by the elevating drive mechanism, the press molded portion X at the end of the long molding material X is moved forward. While pulling out, the subsequent part is fed between the press mold 1 and the lower mold 4, and the entire upper mold 3 is lowered halfway to the presser mold 2 as shown in FIG. 14(b).
a step of press-fixing the previous press-molded part As shown in Figure (C), by repeating the process of further lowering the press mold 1 and press-molding the molding material X, the long molding material X is continuously press-molded one after another, and the long molding material You can get the goods. In this case as well, before press pressure is applied, both the front and back surfaces of the press-formed part No forward flow occurs, and the notches and semi-solidified or solidified portions 54 on both sides of the press die 1 prevent flow to both sides and rearward.

Therefore, the obtained long molded product is beautiful without resin burrs and has a substantially uniform thickness over its entire length. In addition, when the part 54 of the molding material X located at the rear end of the mold is cooled in a non-pressure state by the cooling mold 52 and semi-solidified or solidified as in this continuous press molding apparatus, the bending There is an advantage that the strength is improved compared to the case of the fifth embodiment described above in which the thin wall portion 51 is formed by preliminary pressing.

Note that in order to semi-solidify or solidify the portion 54 of the molding material X located at the rear end of the mold by cooling, a cooling belt operated by a separate elevating drive mechanism may be used instead of the cooling mold 52 of the above embodiment. etc. may be provided, and the cooling belt may be brought into contact with the molding material X in a non-pressure state to cool it before press-molding the molding material X with the press mold 1.

FIG. 15 is a rear view of the upper mold and lower mold of the continuous press molding apparatus according to the seventh embodiment of the present invention, and FIG. ) indicates the state in which the upper mold is lowered. In addition, Fig. 16 is a partial perspective view showing the press molding of the molding material in the upper and lower molds of the same device, and Fig. 17 is an explanatory diagram of a manufacturing line for long molded products incorporating the same device. Figure 18 is an explanatory diagram of the mold operation of the same device, Figure 19
The figure is a partial perspective view of a long molding material used for continuous press molding using the same apparatus.

This continuous press molding device uses the molding surfaces 37 of the press mold 1 and the lower mold 4 to obtain a flat plate-like long molded product with lips.
．． 36 and the pressing surface 38 of the presser die 2 are flat surfaces, and the molding surfaces 36, 37 and the pressing surface 38 are provided with the small rib molding grooves 8, 23, the large rib molding groove 9, and the notch grooves 24a, 24.
b. A positioning groove 10.25 is provided. A cutout part 27 and a cutout receiving part 28 are provided at the rear end of the press die 1 and the rear end of the lower die 4, and cutout parts 39, 39 and a cutout receiving portion 40°40 are provided. Further, although not shown, side wall portions similar to the cutout portions 39 and 39 at the pJ end of the press mold are formed at both ends of the presser mold 20.

As shown in FIG. 15, the cutout portion 27 at the rear end of the press mold 1 is not provided over the entire width of the molding surface 37, but is provided at both ends of the molding surface 37 (it is provided in the center). As shown in FIG. 16, the cutout portion 27 is
passes through the cut groove 55 of the molding material X. Correspondingly, the cutout receiving portion 28 at the rear end of the lower mold 4
is also provided at the center in the width direction. The reason why the cutout part 27 at the rear end of the press mold l is provided at the center in the width direction is that during press molding, a large amount of softened molten resin flows out from the center in the width direction, but from both ends. This is because the amount of outflow is the minimum, so if the central part where the amount of outflow is large is cut off by the cutout part 27, it is possible to substantially prevent the softened molten resin from flowing out to the rear. This makes it possible to perform continuous press molding without completely cutting the molding material X while leaving the ends on both sides of the kerf 55 of the molding material X as connecting portions 57 and 57. This is because it is possible to suppress a decrease in joint strength due to 55, and maintain ease of manufacturing such as transportation of molding material X.

In order to substantially prevent the resin from flowing out, it is necessary to provide the cutout portion 27 at the rear end of the press mold l so as to exclude the portion where the resin fluidity during press molding is the lowest and the amount of resin flowing out is the smallest. Since the location where the amount of outflow is the minimum differs depending on the shape of the mold, it is natural that the location where the cutout portion 27 is provided must be changed accordingly.

The other configuration of this continuous press molding apparatus is substantially the same as that of the first embodiment described above, and therefore the explanation thereof will be omitted.

The continuous press molding device as described above is, for example, the 17th
It is used by being incorporated into a production line for long molded products as shown in the figure. This production line includes a material supply roll 50,
Grooving device 56, conveyor belt 31, heating furnace 32, continuous press molding device 1, take-up roll 34, molded product cutting machine 3
According to this, the material supply roll 5
The long molding material
6, and as shown in FIG. 19, cutting grooves 55 in the width direction are formed one after another, leaving connecting portions 57 and 57 at both ends of the molding material X. This cut groove 55 is into which the cut portion 27 at the rear end of the press mold 1 is inserted during press molding, so the molding material X is transferred to the continuous press molding machine D? upper mold 3
Each time it is fed between the lower die 4 and the lower die 4, the cut groove 55 is formed at a predetermined feed pitch interval 3 so that it is located directly below the cut portion 27. The molding material X with the cut grooves 55 formed therein is heated while passing through the heating furnace 32 on the conveyor belt 31, and then transferred to the continuous press molding device D? The molds are intermittently fed between the upper mold 3 and the lower mold 4 at a predetermined feed pitch and press-molded one after another.

Then, the formed elongated molded product A in the form of a flat plate with ribs is intermittently taken up by a take-up roll 34, and finally cut into a predetermined product size by a molded product cutter 35 to become a product. Note that the cutting grooves 55 may be formed after the molding material X passes through the heating furnace 2.

This continuous press molding apparatus operates as shown in FIG. 18, and continuously press molds a long molded product in the form of a flat plate with ribs from the long molding material X in which the cut grooves 55 have been formed.

That is, as shown in FIG. 18(a), when the entire upper mold 3 is raised by the lifting drive device, the first press-molded part X of the molding material X is pulled out to the lower part of the front presser mold 2, and The large rib 44 at the front end of the press-formed portion X is fitted into the positioning groove 10 and positioned. When the first press-formed part X moves forward and is positioned in this way,
The subsequent part of the molding material X connected to this press-formed part
The th kerf 55 is located directly below the cutout 27 at the rear end of the press mold 1. In addition, during the first press forming, the cutout part 27
The first cut groove 55 into which was inserted has not yet disappeared at this stage and remains along the rear edge of the press-formed portion X.

When the subsequent part of the molding material The part The subsequent part is press-molded into a flat plate. At this time, the softened molten resin of the molding material X completely fills the first cut groove 55 due to the press pressure, and furthermore, the small rib 41.
2 and the large rib forming grooves 9 and 24, the cut groove 55 disappears, and large ribs 43 and 44 are formed that hold the small ribs 22 and 23 from above and below, and mechanically prevent each other. They are fused in the engaged state, and the previous press-formed part X and its successor part are seamlessly joined. At the same time, the softened molten resin also flows into the small rib forming grooves 8 and 23, so that small ribs 41 and 42 are formed at the rear end of the trailing portion of the molding material X.

Also, during this press molding, the softened molten resin of the molding material X tends to flow out of the mold due to the press pressure.
Outflow to the front is reliably prevented because the previous press-formed part Mold 1
It is blocked by cutouts 39.39 on both sides. The rear end of the press mold 1 passes through the second kerf 55 of the molding material The connecting portions 57 and 57 at both ends of the molding material
Since the portions other than the connecting portions 57 and 57 are closed, only a small amount of softened molten resin flows out from the connecting portions 57 and 57.

Therefore, the outflow of the resin is substantially prevented, so that the succeeding part of the molding material X can be press-molded into a ribbed flat plate of a predetermined thickness without causing thin resin flakes on the front and back surfaces of the previous press-molded part X. be able to.

Thereafter, by repeating the same operation, the elongated molding material X having the cut grooves 55 formed therein is successively press-molded to obtain a ribbed flat plate-like elongated molded product.

In the long molded product obtained in this way, the cut groove 55 has disappeared, and each press-formed part is joined to each other with a joint structure in which the small ribs 41, 42 and large ribs 43 and 44 are engaged and fused. Moreover, since the connecting portions 57° 57 are completely continuous, the joint strength is greater than that of a long molded product in which short molding materials are joined simultaneously with press molding. Furthermore, since the outflow of the softened molten resin is substantially prevented during press molding, there is no resin flakiness and the thickness is of course substantially constant over the entire length.

Incidentally, the continuous press molding apparatus D? of this embodiment is Now, cutting part 2
Since the lower end of 7 is shaped like a blade, in some cases,
The long molding material X is fed in as it is without forming the kerf 55, and at the same time as press forming, the molding material
It may be arranged to substantially prevent the softened molten resin from flowing backward.

In the continuous press molding apparatuses of the second to seventh embodiments described above, the molding surfaces 37 of the press die 1 and the lower die 4 are used to obtain a flat plate-like elongated molded product with or without ribs.
36 is flat, and the pressing surface 38 of the presser die 2 is also flat, but in these continuous press molding devices,
Molding surface 37 of press mold 1 and pressing surface 38 of presser mold 2
If the molding surface 36 of the lower mold 4 is made concave and convex, it is possible to continuously press mold a long molded product having a substantially U-shaped cross section, such as a U-shaped groove or a rain gutter. The molding surface 36
．． It goes without saying that by changing the uneven shapes of the pressing surface 37 and the pressing surface 38, a long molded product having an arbitrary cross-sectional shape can be continuously press-molded.

FIG. 20 is a rear view of essential parts of a continuous press molding apparatus according to an eighth embodiment of the present invention, FIG. 21 is an explanatory diagram of the operation of the mold of the same apparatus, and FIG. 22 is a partial sectional view of the mold of the same apparatus. , FIG. 23 is a partial perspective view of a cylindrical long molded product that is continuously press-formed using the same apparatus.

This continuous press molding apparatus is an apparatus for obtaining a long cylindrical molded product as shown in FIG. It includes an upper mold 3, a lower mold 4, and a cylindrical core mold 58 surrounded by the upper and lower molds 3.4. The molding surface 37 of the press mold 1 and the pressing surface 38 of the presser mold 2 are semicircular concave surfaces corresponding to the cylindrical core mold 58, and similarly, the molding surface 36 of the lower mold 4 is also semicircular. It is considered to be a circular concave surface. There are small lip forming grooves 23.8 along the rear edge of this press mold forming surface 37 and along the rear edge of the lower mold forming surface 36, and along the front edge of the press mold forming surface 37 and the presser mold. Quarter-circular notch grooves 24a and 24b are provided along the rear edge of the pressing surface 38, and large rib forming grooves 9 are provided at locations corresponding to the notch grooves on the lower mold forming surface 36. There is. The above-mentioned cutout grooves 24a and 24b are combined to form the large rib forming groove 24 during press molding. In addition, press mold molding surface 3
7 has a flange molding surface 59°59 and a cutout part 3 on both left and right sides.
9.39 is formed, and the lower mold molding surface 36 corresponds to this.
A flange molding surface 60 and a cut receiving portion 40.4 are provided on both left and right sides of the
0 is formed.

On the other hand, at the rear end of the core mold 58, there is a notched portion 61 extending vertically.
are provided, and retaining step portions 62 are provided at both upper and lower ends of the cutout portion 61.
．． 63 is formed. A pair of left and right hooks 64, 64 that engage with the engagement stepped portion 62 at the upper end of the cutout portion 61 are provided to protrude downward from the rear end of the press mold 1, and the engagement step portion 62 at the lower end of the cutout portion 61 A pair of left and right fishing rods 65, 65 that engage with the connecting step portion 63 are provided to protrude upward from the rear end of the lower mold 4. Therefore, the second
When the entire upper mold 3 is raised as shown in Figure 1 (a),
The engagement step portion 62 at the upper end of the cut-out portion 61 of the core mold 58 engages with the hooks 64, 64 of the press mold 1 and pulls up the core mold 58, so that the upper mold 3, the core mold 58, and the lower A sufficient gap is created between the molds 4 to supply the short molding material The engagement of the hooks 64 and 64 is released, and the upper mold 3, core mold 58, and lower mold 4 are closed to perform press molding.

Incidentally, the method of attaching the presser die 2 to the upper mounting plate 14 and other configurations are substantially the same as those of the first embodiment, so a description thereof will be omitted.

When obtaining a long cylindrical molded product using such a continuous press molding device, first, as shown in FIG. Molding materials x, x are supplied between the press die 1 and the core die 58, and between the lower die 4 and the core die 58, respectively. Then, as shown in FIG. 21(b), the entire upper mold 3 is lowered, and the upper molding material X is poured into the press mold 1 and the core mold 5.
At the same time, the lower molding material X is pressed between the core mold 58 and the lower mold 4 to perform press molding. In this way, the softened molten resin of the molding materials x and x flows under the press pressure between the flange forming surfaces 59 and 60 of the press mold 1 and the lower mold 4, and flanges are formed on both the left and right sides, while the upper and lower The side edges of the molding materials x and x are fused together to form a cylindrical press-formed body X. At the same time, small ribs 41.4 are formed at the rear end of the press-formed body X by small rib forming grooves 8 and 23.
2 is formed into an annular shape, and large ribs 43", 44' are formed into an annular shape at the front end of the press-formed body X by the large rib forming grooves 9, 24. Note that the first molding materials x, x are press-formed. When the molding material x,
The softened molten resin x is prevented from flowing backward and to the left and right, but as shown in FIG. 4 large rib molding groove 9
Since the space between the front part and the front part is open, the softened molten resin flows forward from there. Therefore, the front end portion of the first press-formed body X will be defective in molding, so that portion will be cut out later.

When the first press molding is finished, as shown in FIG.
is simultaneously raised, and the first cylindrical press-formed body X is moved forward so that the small ribs 41 and 42 at the rear end are located on the center line of the large rib forming groove 9, and then the next molding material! ! +
X! between the press die 1 and the core die 58, and between the press die 1 and the core die 58.
and the lower mold 4. In this case, the press formed body
In order to position the small ribs 41 and 42 on the center line of the large rib forming groove 9, the press-formed body X must be accurately taken up by a take-up roll or the like, or another mold having a positioning groove may be used. The large rib 43' of the press-formed body X is installed in the groove.
, 44' may be used to accurately position the parts.

Next molding material X! +X! When is supplied, Figure 21 (d)
As shown in the figure, the entire upper mold 3 is lowered, and the pressing mold 2 presses the press-formed body X to press the inner and outer surfaces of the molded body X. The mold 2, the core mold 58, and the lower mold 4 At the same time, the upper and lower molding materials x2°xt are pressed between the press die 1, the core die 58, and the lower die 4 to perform press molding. In this way, as in the case of the first press molding, the upper and lower molding materials
2. Both ends of xt are fused while forming flanges to form a cylindrical press molded body, and the rear end is formed with small ribs 41. 42 is formed into an annular shape. At the same time, the large rib forming groove 24.9 at the front end of the press-formed body allows the small rib 4 at the rear end of the previous press-formed body
The large ribs 43 and 44 that embrace 1.42 are formed into an annular shape and are fused and joined together in a fixed state. During this press molding, the softened molten resin of the molding material Xt+xt tries to flow out of the mold, but the forward flow is
Before press pressure is applied, the inner and outer surfaces of the press-formed body The outflow is from the cutouts 39 and 39 on both sides of the press mold 1 and the core mold 58.
Since it is reliably blocked by the cut-out part 61 at the rear end, no outflow occurs. Therefore, the molding material x2
t can be press-molded into a cylindrical shape with a predetermined thickness.

Thereafter, by repeating the same operation, the upper and lower molding materials are successively supplied and press molding is repeated to obtain a cylindrical long molded product. In the long molded product thus obtained, each cylindrical press molded product X, Xt... has a small lip 41.
．． 42 and the large ribs 43 and 44 are joined together by a bonding structure in which they are engaged and fused, so the bonding strength is high.
Since 6°66 serves as reinforcement, it has high pressure resistance. Furthermore, since the outflow of the softened molten resin is prevented during press molding, it goes without saying that there are no thin burrs of the resin and the thickness is approximately constant over the entire length.

FIG. 24 is a schematic overall configuration diagram of a continuous press molding apparatus according to a ninth embodiment of the present invention, and FIGS. 25 to 31 are sectional views of essential parts for explaining the mold operation of the same apparatus. (a) represents a longitudinal section, and (b) represents a cross section. Moreover, FIG. 32 is a partial perspective view of a large-diameter cylindrical elongated molded product that is continuously press-formed using the same apparatus, and FIG. 33 is a schematic explanatory diagram of the continuous press-forming method using the same apparatus.

This continuous press-forming apparatus is an apparatus for continuously press-molding a large-diameter cylindrical long molded product as shown in FIG. 32, and as shown in FIG. is erected, and the lower mold 4 is fixed on the intermediate support base 68 of the support column 67 via the lower mounting plate 7. An elevating drive mechanism 6 is provided on the upper support base 69 of this column 67.
The upper mold 3 is attached to this elevating drive mechanism 6 via an upper mounting plate 14.

This upper mold 3, as shown in FIGS. 25(a) and (b),
It is divided into four parts: a press die 1, a presser die 2 at the front, and presser dies 70.71 on both left and right sides, and these presser dies 2, 70, and 71 are all suspended so as to be movable up and down. A coil spring 17 is interposed between the upper mounting plate 14 and the upper mounting plate 14 . The molding surface 37 of this press mold 1 and the pressing surface 38 of the front presser mold 2 are both 1/8 arc-shaped concave surfaces,
The pressing surfaces of the presser molds 70 and 71 on both sides are also arcuate concave surfaces with the same radius of curvature as the press mold forming surface 37. and,
Correspondingly, the molding surface 36 of the lower mold 4 is an arcuate convex surface.

A small lip molding groove 23.8 is provided along the rear edge of this press mold forming surface 37 and the rear edge of the lower mold molding surface 36, and along the front edge of the press mold forming groove 37. Along the rear end edge of the pressing surface 38 of the presser mold, there is a quarter-circular notch groove 24a that is combined with the large lip molding groove 24 during press molding,
24b are provided respectively. On the other hand, a large lip molding groove 9 corresponding to the large lip molding groove 24 is provided in a portion of the lower mold molding surface 36 immediately below the notch grooves 24a, 24b. Furthermore, a cutout portion 27 and a cutout receiving portion 28 are provided at the rear ends of the press die 1 and the lower die 4, respectively.

Moreover, as shown in FIG. 25(b), this press mold 1
There are small, approximately quarter-circular grooves along the left and right edges of the The nesting molds 73 and 74 provided with the molds 2a are each removably fitted, and correspondingly, along the inner edges of the left and right presser molds 70 and 71, there are small notches in the shape of a roughly quarter circle. A nesting mold 75° 76 provided with a groove 72b is removably fitted. These small notch grooves 72a and 72b are combined to form a small lip molding groove 72 during press molding, as shown in FIG. 26(b). Further, near both ends of the lower mold 4, insert molds 78 and 79 are removably fitted, each having a small lip forming groove 77 corresponding to the small lip forming groove 72 described above.

The nested molds 73 and 74 fitted along the left and right edges of the press mold 1 are used during continuous press molding as shown in FIG. 27(b) and FIG. 28(b). , is designed to be replaced with a nesting die 81,82 having a large substantially quarter-circular notch groove 80a. The installed nesting molds 75, 76 are also replaced with nesting molds 83, 84 provided with large substantially quarter-circular notched grooves 80b.

These cutout grooves 80a and 80b are combined to form the large lip molding groove 80 during press molding.

Similarly, the nested molds 78 are fitted near both ends of the lower mold 4.
79, as shown in FIG. 27(b) and FIG. 28(b), is a molded insert in which a large lip forming groove 85 corresponding to the above-mentioned large lip forming groove 80 is provided in a step in the middle of continuous press molding. It is intended to be replaced with type 86.87.

The continuous press molding apparatus having the above structure operates as follows to continuously press mold a long molded product having a large diameter cylindrical shape as shown in FIG. 32 from a short molding material X.

First, as shown in FIGS. 25(a) and 25(b), with the entire upper mold 3 raised, the heated first short molding material
is supplied between the press die 1 and the lower die 4. Then, as shown in FIGS. 26(a) and 26(b), the entire upper mold 3 is lowered by the elevating drive mechanism, and the presser mold 2 in front of the thread mold 1 and the presser molds 70 and 71 on both sides are lowered. At the same time as closing, the molding material X is pressed by the press mold 1 while preventing the outflow of the softened molten resin by the notched part 27 at the rear end of the press mold 1, and is formed into a curved plate shape of 1/8 arc. At this time, the front end of the curved plate-shaped press molded body X has a notch groove 24 on the front edge of the press die 1
a and the large lip forming groove 9 of the lower mold 4, an upwardly directed Ushiku large lip 43' and a downwardly directed large lip 44 are formed, and at the rear end of the press molded body X, the rear edge of the press mold 1 is formed. Small ribs 41 and 42 that protrude vertically are formed by the small lip forming groove 23 and the small lip forming groove 8 on the rear end edge of the lower mold 4.

At the same time, nesting molds 73 are installed at both left and right ends of the press-formed body X.
．． 75 and each small notch groove 72 of the nested type 74 and 76
A small lip forming groove 72.72 where parts a and 72b are combined, and a small lip forming groove 77.
77, small ribs 88 and 89 that protrude vertically are formed.

When the first press molding is finished, the entire upper mold 3 is raised, the insert mold 79 near the right end of the lower mold 4 is replaced with the insert mold 87, and the insert mold 79 near the right end of the press mold 1 is replaced with the insert mold 87. The mold 74 and the nesting mold 76 of the right presser mold 71 are replaced with the nesting mold 82 and the nesting mold 84, respectively, and the first press-formed body X is rotated 1/8 turn clockwise as shown in FIG. The small lips 88 and 89 at the left end of the press-formed body
The next molding material is supplied between the press mold 1 and the lower mold 4 after being positioned so that it is approximately on the center line of the large lip molding groove 85. Then, the entire upper die 3 is lowered, and the previous press-formed body Press molding the molding material using mold 1,
When press-formed in this way to form a press-formed body X2 in the shape of a curved plate having an arc of 1/8, large lips 43' and 44 are formed at the front end of the press-formed body X8, as in the case of the first press-forming.
However, there are small ribs 41 and 42 on the rear end, and small ribs 8 on the left end.
8.89 are respectively molded.

At the same time, a nesting mold 82 is placed on the right end of the press molded body X8.
．． The small ribs 88 and 89 at the left end of the press-formed body X are held from above and below by the large rib forming grooves 80 and the large lip forming grooves 85 of the nesting die 87, in which the respective notch grooves soa and sob of 84 are combined. Large lips 90, 91 are molded, and these large and small lips are fused and joined together in a state where they are held together.

During this press molding, the softened molten resin of the molding material tends to flow out of the mold, but this flow to the right side is because the previous press molded body X is pressed and fixed by the presser mold 71 on the right side without any gap. Further, outflow to the front is prevented by the front presser die 2, outflow to the left side is prevented by the left presser die 70, and outflow to the rear is prevented by the cutout portion 27. Therefore, the molding material can be press-molded into a curved plate shape of a predetermined thickness without producing thin resin burrs on the front and back surfaces of the press-formed body X.

After that, the above press-forming operation is repeated five times to join the first press-formed body X to the seventh press-formed body At the same time, the nesting die 73 at the left end of the press die 1 and the nesting die 75 of the left presser die 71 were replaced with the nesting die 81 and the nesting die 83, respectively, as shown in FIG. , so that the small ribs 88 and 89 on the right side of the first press-formed body small rib 88
．． 89 are positioned approximately on the center line of the large rib forming groove 85 of the nesting mold 87. Then, the molding material for the 8th sheet is supplied between the press mold l and the lower mold 4, and the entire upper mold 3 is lowered as shown in FIG. Press and fix the press-formed body X with the left and right presser molds 70 and 71, and
Close the mold, press mold the molding material with press mold 1, and press 1/
When press-formed in this way to form a press-formed body Xl in the shape of a curved plate with an 8-arc arc, large ribs 43' and 44 are formed at the front end of the press-formed body X□, and large ribs 43' and 44 are formed at the rear end, as in the case of the press-forming described above. Small ribs 41 and 42 are formed respectively. At the same time, a nesting mold 81.83 is placed at the left end of the press molded body X.
The large rib molding 80 in which the respective notch grooves 80a and 80b of Ribs 90, 91 are formed, and a large rib 9 is formed on the right end of the press-formed body
0.91 is molded, and these large and small ribs are engaged and fused to each other and joined together. Therefore, as shown in FIGS. 32 and 33, eight curved plate-shaped press molded bodies XX,
A short large-diameter cylindrical molded body X1° is obtained which is joined to each other with a joining structure by engagement and fusion of the small ribs (not shown in FIGS. 32 and 33) at both ends and the large ribs 90 and 91.

After obtaining the first short large-diameter cylindrical molded body xis in this way, the entire upper mold 3 is raised, and the nesting molds 81 and 82 on both sides of the press mold 1 are turned into nesting molds 73° and 74. The nesting molds 8384 of the left and right presser molds 70.71 are replaced with the nesting molds 75.76, and the nesting molds 86.87 of the lower mold 4 are replaced with the nesting molds 78.79. Move the molded body Xll forward so that the small ribs 41 and 42 formed at the rear end of the first curved plate-shaped press molded body X are on the center line of the large rib forming groove 9 of the lower mold 4. After positioning, the next ninth sheet of molding material is supplied between the press mold 1 and the lower mold 40.

Then, as shown in FIG. 29, the entire upper mold 3 is lowered, and the press-formed body X is pressed and fixed by the front presser mold 2, and the molding material is press-molded by the press mold 1. , 1/8 arc curved plate-shaped press molded body X,
At this time, at the front end of the press molded body X, there is a press mold 1.
Notch groove 24a on the front edge and notch groove 24 on the rear edge of the presser die 2
The small lip 41 at the rear end of the press-formed product
．． Large ribs 43 and 44 that hold 42 from above and below are formed, and are engaged and fused to each other and joined together. At the same time, small ribs 41.42 protrude vertically from the rear end of the press-formed body X through small rib forming grooves 23 and 8, and small ribs 41.42 protrude vertically from both left and right ends through small rib forming grooves 72.77. Small ribs 88,89 are formed respectively. During this press molding, the softened molten resin of the molding material tends to flow out of the mold, but the forward flow is ensured because the previous press molded body X is pressed and fixed by the front presser mold 2 without any gaps. The leakage to both sides is prevented by the left and right presser molds 7.
0.71, and the outflow to the rear is also prevented by the cutout part 27.
will be blocked. Therefore, the press-formed product X can be press-molded into a curved plate shape of a predetermined thickness without producing thin resin burrs on the front and back surfaces.

Next, the entire upper mold 3 is raised, each nesting mold is replaced in the same manner as in the press molding of the second press-formed body X2, and this curved plate-shaped press-formed body X9 is rotated by 1/8 rotation. Move and supply the 10th sheet of molding material. Then, the entire upper mold 3 is lowered, and as shown in FIG. 30, the front curved plate-shaped press molded body X, are pressed and fixed with the presser die 71 on the right side without any gaps, the presser die 70 on the left side is closed, and the 10th sheet of molding material is press-molded with the press die 1 to form a 1/8 arc curve. A plate-shaped press molded body XI6 is formed. When press-formed in this way, at the front end of this curved plate-shaped press-formed body X1°, there is also a large lip 43.44 that holds the small lip 41.42 at the rear end of the curved plate-like press-formed body Xt from above and below. A large lip 90.91 is formed on the right end to hold the small ribs 88, 89 on the left end of the curved plate-shaped press molded body X from above and below, and these large and small lips are fused together and integrated. is joined to. Also,
Since the outflow of the softened molten resin is also prevented in the same manner as described above, thin flakes of the resin are not generated (the press-formed product X having a predetermined thickness is obtained).

After that, repeat the above press molding operation 5 times to make 155
After joining up to the 8th press-formed body XIS, replace each nesting mold as in the case of the 8th press-formed body X,
Press molded bodies X on both left and right sides.

After positioning XI5, the 166th sheet of molding material is supplied and press-formed as shown in FIG. 31 to form a curved plate-shaped press-formed body X0 of 1/8 arc.

When press-formed in this way, the press-formed body X I b
At the front end of O and both left and right ends, there are large lips 43.44 that hold small ribs 41.42 at the rear end of the front press molded body X teeth from above and below.
and the small ribs 88 of the press-formed bodies x and l xis on both sides.
．． Large lips 90 and 91 that hold 89 from above and below are molded, and are engaged and fused to each other to form a large diameter short cylindrical molded body X□.

Thereafter, by repeating the above operation, eight curved plate-shaped molded bodies XI? -Large diameter short cylindrical molded body XI consisting of ~Xz4? ! 4 and the previous large-diameter short cylindrical molded body X
9+6, and in the same manner, a large-diameter short cylindrical molded body consisting of 8 curved plate-shaped molded bodies is formed one after another, and joined to the previous large-diameter short cylindrical molded body to form a large-diameter cylindrical molded body. Manufacture long molded products.

The long cylindrical molded product obtained in this way has no thin flakes because the outflow of the softened molten resin during press molding is prevented, the thickness is almost constant over the entire length, and the size in the circumferential direction is Since the lips 41, 42, 43, 44 and the large and small rips 88, 89, 90, 91 in the longitudinal direction serve as reinforcement, the pressure resistance is high. Furthermore, in the apparatus of the above embodiment, the molding surfaces of the press mold 1) presser mold 2, lower mold 4 or Although the pressing surface is a 1/8 arc concave or convex surface, by changing the shape of the molding surface or pressing surface of these molds, it is possible to obtain a molded product with any diameter and number of divisions. If this continuous press molding apparatus is used, there is an advantage that even long cylindrical molded products with large diameters, which cannot be obtained using conventional continuous extrusion molding apparatuses or continuous blow molding apparatuses, can be produced relatively easily. In addition, in this apparatus, if the molding surfaces of the press mold and the lower mold and the pressing surface of the presser mold are flat surfaces, a wide elongated flat molded product can be obtained.

〔Effect of the invention〕

As can be understood from the above explanation, the continuous press molding apparatus of the present invention divides the upper die into a press die and a presser die adjacent at least in front of the upper die, so that the presser die is used to perform the previous press. The molded body or press-formed part is pressed and fixed without any gaps, and then the next molding material is pressed with a press mold to form the desired shape, so that the softened molten resin of the molding material is applied to the previous press-formed body by the press pressure. Alternatively, it is possible to reliably prevent the resin from flowing out to the front and back surfaces of the press-molded part, and it is possible to obtain a long molded product that is beautiful and has high commercial value without any thin particles of the resin flowing out.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a continuous press molding apparatus according to the first embodiment of the present invention, FIG. 2 is a side view of the main parts of the same apparatus showing the upper mold in cross section, and FIG. A rear view of the main parts of the same device with the cutout part and cutout receiving part omitted, Figure 4 is an explanatory diagram of a manufacturing line for long molded products incorporating the same device, and Figures 5 (a) to (f).
6 is a partial perspective view of a long molded product that is continuously press-molded by the same device, and FIGS. An operation explanatory diagram explaining the mold operation of the continuous press molding device according to the second embodiment, FIG. 8 is a rear view of the main part of the continuous press molding device according to the third embodiment of the present invention, and FIG. 9 (A) ~(D) is an operation explanatory diagram explaining the mold operation of the same device, FIG. 10 is a rear view of the main part of the continuous press molding device according to the fourth embodiment of the present invention, and 1) FIG. (D) is an operation explanatory diagram explaining the mold operation of the same device, and FIGS. An explanatory diagram, FIG. 13 is an explanatory diagram of a manufacturing line for long molded products incorporating the same device, and FIGS. 14 (a) to (c) are molds of a continuous press molding device according to a sixth embodiment of the present invention. FIG. 15 is a rear view of the main parts of the continuous press molding apparatus according to the seventh embodiment of the present invention, and FIG.
Figure 16 shows the state in which the upper mold is raised, Figure 16 shows the state in which the upper mold is lowered, and Figure 16 shows the molding material being press-molded with the upper and lower molds of the same device. A partial perspective view, FIG. 17 is an explanatory diagram of a manufacturing line for long molded products incorporating the same device, FIGS. 20 is a rear view of the main parts of the continuous press molding device according to the eighth embodiment of the present invention, and FIGS. ) is an operation explanatory diagram explaining the operation of the mold of the same device, FIG. 22 is a partial sectional view of the mold of the same device, and FIG. 23 is a partial perspective view of a cylindrical long molded product that is continuously press-formed by the same device. FIG. 24 is a schematic overall configuration diagram of a continuous press molding apparatus according to a ninth embodiment of the present invention,
25 to 31 are operational explanatory diagrams sequentially explaining the mold operation of the same device, in each figure (a) represents a vertical cross section of the mold, and (b) represents a cross section of the mold. In addition, Fig. 32 is a partial perspective view of a large diameter cylindrical long molded product that is continuously press-formed by the same device, Fig. 33 is a schematic explanatory diagram of the continuous press-forming method using the same device, and Fig. 34 is a conventional continuous press-forming method. The explanatory drawings of the press forming apparatus, FIGS. 35 to 37, are partial views for explaining the problems of the conventional apparatus. (Brief explanation of the drawings) 1... Press die, 2.70.71... Presser die, 3... Upper die, 4... Lower die.

Claims (1)

[Claims] (1) A continuous press molding apparatus equipped with an upper mold and a lower mold, characterized in that the upper mold is divided into a press mold and a presser mold adjacent at least in front of the upper mold. Molding equipment.