JP2560394B2 - Molding manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a plurality of long moldings having different cross-sectional shapes.

[Conventional technology]

A long synthetic resin molded product is used as other moldings for vehicles. Some of them have the same basic structure but different cross-sectional shapes in detail. Conventionally, these moldings have been manufactured by different manufacturing processes using different extrusion molds.

Hereinafter, the molding for the vehicle will be mainly described. First
FIG. 15 is a perspective view of the vehicle. In the figure, 1 is a vehicle body, 2
Is a front window, 3 is a door, 4 is a side window, 5 is a window molding, and 6 is a side molding.

FIG. 16 is a sectional view taken along line AA of FIG. 15 showing a conventional window molding 5 disclosed in, for example, Japanese Patent Laid-Open No. 61-135824, FIG. 17 is a sectional view taken along line BB, and FIG. It is a figure. The window molding 5 has an upper portion 7 and a side portion 8 which are synthetic resin extruded products and are joined by a corner joint 9. As shown in FIG. 16, the upper portion 7 includes a molding main body 5a that covers a gap between the window plate 10 and the vehicle body panel 11,
Lip 5b that abuts 10 and lip that abuts body panel 11
5b ', the leg portion 5c extending into the gap, and the window plate 10 and the vehicle body panel 11 extending from the leg portion 5c to both sides.
A fin 5d is provided, which is formed by extrusion with a synthetic resin. Decorative film on the molding body 5a
12, a core 13 is embedded in the leg 5c.

The side part 8 is a common part having the same cross-sectional shape as the upper part 7
A ridge 16 is provided as an additional portion 15 on the base 14, and a crest 17 is formed so that rainwater flowing on the window plate 10 is collected and made to flow down to prevent lateral flow to the side window 4. The corner joint 9 connects and integrates the upper portion 7 and the side portion 8 having different cross-sectional shapes as described above.

As described above, the window molding 5 is composed of the upper portion 7 and the side portion 8 having different cross-sectional shapes, and both have a structure in which the protrusion 16 as the additional portion 15 is added to the common portion 14 corresponding to the upper portion 7. There is.

Fig. 19 shows another window molding 5 Fig. 15
FIG. 20 is a sectional view taken along the line A-A in FIG. In this window molding 5, the decorative film 12 of the molding 5 of FIGS. 16 and 17 is omitted, and the outer surface of the molding body 5a is a uniform surface.

21 and 22 are perspective views showing the side molding 6. The side molding 6 has a structure in which a molding body 6a made of a synthetic resin extruded product in which a decorative film 12 and a core material 13 are embedded is used as a common portion 14, and a plurality of protrusions 16 are added as additional portions 15 depending on the vehicle type. Has become. 23 and 24 show another side molding 6, which has a structure in which the decorative film 12 is omitted from those shown in FIGS. 21 and 22.

FIG. 25 is a system diagram showing a conventional molding manufacturing method. The conventional manufacturing method uses extrusion molding dies 21 having different cross-sectional shapes for each molding 20 having different cross-sectional shapes, and supplies the decorative film 12, the core material 13 and the like to this, and also supplies the resin from the extruder 22. Perform extrusion molding, cool the extruded material 23 in the cooling tank 24, and take it by the take-off machine 25,
The cutting machine 26 cuts to manufacture the molding 20.

[Problems to be Solved by the Invention]

However, in such a conventional manufacturing method, an extrusion molding die is prepared for each type of molding having a different cross-sectional shape, and extrusion molding of the molding is performed in separate steps, so that the manufacturing cost of the extrusion molding die is high. Become. Further, it takes time to replace the extrusion mold, and it also takes time until the extrusion can be stably carried out to an accurate dimension after the start of extrusion, during which time materials such as resin and core material are wasted.

On the other hand, during extrusion molding, near the exit of the extrusion mold,
A method of welding a resin portion is known (for example, Japanese Patent Publication No.
-11829, JP-A-54-93055, 57-185133, 60
-116423, 58-205746, 59-59426). However, such a method is also used for manufacturing moldings having the same cross-sectional shape, and in the case of manufacturing different moldings having different cross-sectional shapes, it is necessary to use the same number of extrusion molds for each type of molding. is there.

An object of the present invention is to continuously manufacture a plurality of types of long moldings having different cross-sectional shapes in a simple operation and in a short time by using one extrusion mold to solve the above-mentioned problems. It is to propose a molding method which can be performed.

[Means for solving the problem]

This invention, in a method of manufacturing a plurality of types of long moldings having different cross-sectional shapes, a common portion extrusion hole formed in a state of partially covering the common portion of each molding, and the addition portion of each molding. A resin is supplied from an extruder to an extrusion mold having one or more additional portion extrusion holes to be formed in close proximity to each other, and the resin is extruded synchronously from each extrusion hole, and the extruded common portion and additional portion are in a softened state. Occasionally, the first molding is manufactured in a state of being joined or separated, and after the production of the first molding reaches a predetermined amount, the extruded common portion and the additional portion are kept in a state of being separated or joined. In some steps of the process of manufacturing the second molding and manufacturing the first or second molding, the coating part that covers the common part is cut off to remove the third or third molding. A method for producing a molding, characterized in that to produce a fourth molding.

As the covering portion, for example, one covering the decorative member embedded in the common portion can be cited. The extruders for supplying the resin to the common-portion extrusion holes and the additional-portion extrusion holes may be the same or different.

In manufacturing the molding, the order of joining and separating the common part and the additional part is arbitrary, but after manufacturing the first molding while keeping the common part and the additional part bonded, the common part and the additional part are added. It is preferable to manufacture the second molding while keeping the parts separated, and in this case, the covering part is cut off to remove the third or fourth molding at a step before the step of manufacturing the first or second molding. It is preferable to manufacture the molding. Alternatively, a plurality of additional portion extrusion holes may be provided, and switching may be performed so that another additional portion is selectively combined and joined. It is preferable that the additional portion is joined from the lower side upward so that the additional portion falls by its own weight at the time of separation and separates. Further, it is preferable to cut the additional portion at the time of starting the joining or separation of the additional portion, because the additional portion immediately joins and separates, so that the additional portion does not pull and deform the extruded product.

As the molding to be manufactured in the present invention, in addition to moldings for vehicles such as window moldings and side moldings, fittings such as sashes for construction, ornaments for home appliances, trim edges of furniture, etc.
General moldings other than those for vehicles are included.

[Action]

In the method for producing a molding of the present invention, when producing a plurality of types of long moldings having different cross-sectional shapes, the same or different extrusion is performed in an extrusion mold having a common part extrusion hole and an additional part extrusion hole. The resin is supplied from the machine and synchronously extruded from each extrusion hole. The common part and the additional part having the extruded covering part are joined in a softened state in the vicinity of the outlet, or the first molding while keeping the separated state. To manufacture. After the production of the first molding reaches a predetermined amount, the second molding is produced while keeping the extruded common part and the additional part separated or joined. Then, at some stage of the manufacturing process of the first or second molding, the covering portion of the common portion is cut off,
Alternatively, the fourth molding is manufactured. The additional portion extruded in the separated state is recovered and used again.

〔Example〕

Hereinafter, the present invention will be described based on embodiments of the drawings. FIG. 1 is a schematic system diagram showing a manufacturing method of an embodiment for manufacturing the molding shown in FIGS. 16 to 20, FIG. 2 is a sectional view of an essential part showing a joined state, and FIG. 3 is an essential part showing a separated state. Sectional view, FIG. 4 is a sectional view taken along line DD of FIG. 2 and FIG.
FIG. 6 and FIG. 6 are EE sectional views of FIG. 2, FIG. 7 and FIG. 8 are FF sectional views of FIG. 3, and FIG. 9 is a partially enlarged view of FIG. 6 and FIG. FIG. 10 is a sectional view taken along line HH of FIG.
FIG. 11 is a sectional view taken along the line I--I of FIG. 6, FIG. 12 is an enlarged view of a portion G of FIG. 3, FIG. 13 is a perspective view thereof in the J direction, and FIG. 2 is HK of FIG. FIG. 3 shows a section taken along the line L--L in FIG. 7, and the same reference numerals as those in FIGS. 15 to 25 designate the same or corresponding parts.

The extrusion mold 21 includes an adapter 27 and an extrusion die 28, and forms a common portion 14 of the molding 20 with the decorative film 12 covered with the coating portion 12a.
9, and has an additional portion extrusion hole 30 forming the additional portion 15,
Separate extruders 22, 22a through different resin flow paths 31, 31a respectively
It is connected to. A guide 32 for supporting the common portion 14 from above is provided on the outlet side of the extrusion die 28, and a joining member 33 is provided on the lower side to face the guide 32, and is reciprocated by a fluid pressure cylinder 34. . The joining member 33 has a cutting blade 37 made of a metal wire attached by a frame 36a to an upper portion of a portion of the receiving base 36 having the sliding groove 35 in proximity to the extrusion die 28. The pedestal 36 is preferably made of metal, hard resin, or the like, and has a flat surface and the resin of the additional portion 15 does not adhere thereto.

A cutting member 60 is provided so as to face the covering portion 12a so as to cut the covering portion 12a. The cutting member 60 is the covering portion 12
Two parallel rotary cutters 61 that come into contact with both ends of a and cut are reciprocated by a fluid pressure cylinder 62.

The manufacturing method of the molding 20 (the upper part 7 and the side part 8 of the window molding 5)
The resin raw material is supplied from the supply pipe 41 to the extruder 22 via the hopper 42, and the raw material resin of the addition section 15 is supplied from the supply pipe 41a to the extruder 22a via the hopper 42a, where the molten resin
43, 43a are supplied to the resin flow paths 31, 31a of the extrusion mold 21.
On the other hand, the decorative film 12, the core material 13 and the like are supplied from the uncoiler 44 to the common portion extrusion hole 29 of the extrusion molding die 21 to perform extrusion molding. Although the decorative film 12 and the core material 13 are supplied to different positions, they are shown by a single line for simplification.

The resin 43, 43a forming the molding 20 is A
BS resin, acrylonitrile resin, vinyl chloride resin, methyl methacrylate resin, ionomer resin, etc. can be used. As the decorative film 12, a transparent fluororesin film having poor adhesion (good releasability) with the covering portion 12a of the molding body 5a formed on the outer surface side, and a molding body 5a formed on the back surface It is preferable that a colored resin sheet, a metal vapor deposition layer, and the like are laminated between the resin sheet having compatibility and being capable of being welded.

In the extrusion mold 21, the resins 43 and 43a supplied from the extruders 22 and 22a are respectively sent from different resin flow paths 31 and 31a to the common part extrusion hole 29 and the addition part extrusion hole 30 and extruded, respectively coated. The common portion 14 having the portion 12a and the additional portion 15 are formed in a separated state. At the start of extrusion molding, as shown in FIG. 3, while the joining member 33 is retracted, the resins 43 and 43a are extruded and a test run is performed, and the addition portion 15 is dropped. The dropped additional unit 15 is pelletized and collected by the collection machine 45, and can be returned from the return pipe 46 to the hopper 42a for reuse.

When the common part 14 and the additional part 15 are extruded in a stable state with accurate dimensions, the first step is to join the common part 14 and the additional part 15 shown in FIG. 16 to expose the decorative film 12 to the molding. In order to manufacture 20 (in the embodiment, the side portion 8 of the window molding 5), as shown in FIG. 2 and FIG.
33 is moved forward, the additional portion 15 is joined to the common portion 14, and the rotary cutter 61 is moved forward by the fluid pressure cylinder 62, and a continuous cut reaching the outer surface of the decorative film 12 is formed in the covering portion 12a. To remove. In this case, the additional portion 15 is cut by the rise of the cutting blade 37, the additional portion 15 extruded before cutting naturally falls by its own weight, and the additional portion 15 extruded after cutting is the sliding groove 35 of the pedestal 36. And is welded to the common portion 14 as the pedestal 36 rises. At this time, the common portion 14 is supported from above by the guide 32, and deformation is prevented. Further, the cutting of the covering portion 12a in the width direction is performed by the rotary cutter 61 by the cutting blade attached to the cutting member 60.
It is supposed to be done in synchronization with the forward and backward movement of
Illustration is omitted.

Since the common part 14 and the additional part 15 are joined in a softened state,
Immediately welded and integrated, the joined state is maintained, the two are joined, and the extruded material 23 with the covering portion 12a cut off is obtained. After that, it is cooled in the cooling tank 24 and solidifies, and the take-up machine 25
And the cutting machine 26 while detecting the position with the sensor 47.
It is cut to length with the molding 20 shown in Fig. 17.
(Side part 8) is manufactured. At this time, the molding 20 can also be obtained by winding onto the winding drum 50 while detecting the position with the sensor 49 via the idler 48 without cutting with the cutting machine 26, and cutting later.

After the production of the molding 20 shown in FIG. 17 by the first step reaches the planned amount, as shown in FIG.
Thus, the rotary cutter 61 is retracted, the common portion 14 and the additional portion 15 are joined together without cutting off the covering portion 12a, and the molding 20 (side portion 8) having a shape corresponding to FIG. 20 is manufactured.

After the production of the molding 20 in which the additional portion 15 is joined in the first and second steps reaches the planned amount, the additional portion is added as the third step.
In order to manufacture the molding 20 of FIG. 16 (the upper portion 7 of the window molding 5 in the embodiment) in which 15 is not joined, the joining member 33 is retracted by the fluid pressure cylinder 34 as shown in FIGS. 3 and 7. The additional portion 15 is dropped while keeping it separated, and the rotary cutter 61 is advanced by the fluid pressure cylinder 62 to cut off the covering portion 12a. In this case, the additional portion 15 is cut by the lowering of the cutting blade 37, and the additional portion 15 extruded after the cutting falls along the sliding groove 35 by its own weight. Here, the supply of the resin 43a by the extruder 22a may be stopped, but when it is necessary to restart the joining later, the extrusion can be continued as it is. In this case, the addition unit 15 is recovered from the recovery machine 45 and returned to the hopper 42a. In this way, the extruded material 23 including only the common portion 14 obtained by cutting off the covering portion 12a is obtained, and the additional portion 15 is formed in the same manner as described above.
The molding 20 (upper part 7) of FIG.

After that, as the fourth step, by retreating the cutting member 60 as in the previous time, the additional portion 15 is not joined and the covering portion is not joined.
Molding 20 corresponding to FIG. 19 without cutting off 12a
(Upper part 7) is manufactured.

In the above description, the decorative film is used in the second and fourth steps.
12 is unnecessary, but if you omit it, it may not be possible to maintain a normal shape, so it is the same shape as the decorative film 12,
It is preferable that an inexpensive resin film having a good weldability with the molding body 5a is supplied and embedded instead of the decorative film. In this case, when switching between both films, the ends of both films can be connected by a connecting tape and supplied.

The resin 43 forming the common portion 14 and the resin 43a forming the additional portion 15 may be the same or different, and those having different color tones, transparency and hardness can be freely selected. For example, in the case of the window molding 5 according to the embodiment, if a ridge 16 having a high hardness is used as the additional portion 15, deformation of the ridge 16 during use can be prevented.

In the above embodiment, the extrusion mold 21 is fed from another extruder 22, 22a.
Although the resin is supplied to the common-portion extrusion hole 29 and the additional-portion extrusion hole 30, the resin flow path may be branched from the same extruder and supplied in the extrusion molding die 21. Further, although the test run is performed in a state where the common portion 14 and the additional portion 15 are separated from each other, the test run may be performed in a state where both are joined. In addition, in the first and second steps, the molding 20 (side section 8) in which the common section 14 and the additional section 15 are joined is manufactured, and in the third to fourth steps, the molding 20 (upper section 7) in which the additional section 15 is not joined is manufactured. This is preferable because the extrusion moldability is stable, but it may be reversed.

Further, as a drive source for the joining member 33 and the cutting member 60, reciprocation may be performed by ball drive or the like instead of the fluid pressure cylinder.

The side molding 6 shown in FIGS. 21 to 24 is manufactured in the same manner. In addition, a plurality of additional portion extrusion holes 30 are provided, connected to the same or different extruders, and a plurality of joining members 33 are provided correspondingly, and different additional portions 15 are joined to form different cross-sectional shapes. Various types of moldings can be manufactured.

FIG. 14 is a sectional view showing a joining member 33 in another embodiment. The joining member 33 is of a roller type in which two rollers 51 and 52 having sliding grooves 35 are attached to a guide frame 53, and the rollers 51 and 52 rotate so as to press the additional portion 15. Has become.

〔The invention's effect〕

According to the present invention, a resin is supplied from an extruder to the common part extrusion hole and the additional part extrusion hole of the extrusion mold and extruded, and the common part having the extruded covering part and the additional part are joined or separated. The first molding is manufactured to reach a predetermined amount, and the second common molding is manufactured by keeping the extruded common part and the additional part separated or joined. At some stages of the process of manufacturing the first or second molding, the coating part that covers the common part is cut off to manufacture the third or fourth molding, so that one extrusion is performed. Multiple types of moldings with different cross-sectional shapes can be continuously and efficiently manufactured using a molding die, eliminating the need to replace the extrusion die and the accompanying test run. There is reduced, it is shortened manufacturing time.

[Brief description of drawings]

FIG. 1 is a schematic system diagram showing a manufacturing method of an embodiment, FIG. 2 is a cross-sectional view of an essential part showing a joined state, FIG. 3 is a cross-sectional view of an essential part showing a separated state, and FIG. 3 is a sectional view taken along line DD of FIG. 3, FIGS. 5 and 6 are sectional views taken along line EE of FIG. 2, and FIG.
8 and 9 are sectional views taken along line FF in FIG. 3, and FIG.
Fig. 8 and Fig. 8 are partially enlarged views, and Fig. 10 is HH of Fig. 5.
A sectional view, FIG. 11 is a sectional view taken along the line II of FIG. 6, and FIG. 12 is a sectional view of FIG.
FIG. 13 is an enlarged view of part G in FIG. 13, FIG. 13 is a perspective view of the same in the J direction, FIG. 14 is a cross-sectional view of a joining member of another embodiment, FIG. 15 is a perspective view of a vehicle body, and FIGS. 15 is a sectional view taken along the line AA of FIG. 15, showing a window molding of FIG. 17, FIG. 17 and FIG. 20 is a sectional view taken along the line BB of FIG. 18, FIG. 18 is an enlarged view of a portion CC, and FIGS. A perspective view showing the side molding,
FIG. 25 is a system diagram showing a conventional molding manufacturing method. In the drawings, the same reference numerals indicate the same or corresponding parts, and 5,
6, 20 are moldings, 12 is a decorative film, 12a is a covering part, 14 is a common part, 15 is an adding part, 21 is an extrusion mold, 22,
22a is an extruder, 23 is an extruded material, 24 is a cooling tank, 25 is a take-off machine, 26 is a cutting machine, 29 is a common part extrusion hole, 30 is an additional part extrusion hole, 33 is a joining member, and 60 is a cutting member. is there.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 63-112138 (JP, A) JP 61-44617 (JP, A) JP 53-132061 (JP, A)

Claims (4)

(57) [Claims] 1. A method of manufacturing a plurality of types of elongated moldings having different cross-sectional shapes, wherein a common portion extrusion hole formed by partially covering a common portion of each molding and an addition portion of each molding. Forming 1
The resin is supplied from the extruder to the extrusion mold that has the above-mentioned additional portion extrusion holes in close proximity, and the resin is extruded synchronously from each extrusion hole, and the extruded common portion and additional portion are joined when in a softened state. Alternatively, the first molding is manufactured in a separated state, and after the manufacturing of the first molding reaches a predetermined amount, the second common molding is maintained in a state in which the extruded common part and the additional part are separated or joined. And a third or a fourth molding is manufactured by cutting off a coating part that covers the common part in a part of the step of manufacturing the first or the second molding. Molding manufacturing method. 2. A first molding is manufactured by joining a common part and an additional part to manufacture a first molding, and then manufacturing a second molding while keeping the common part and the additional part separated. 2. The method according to claim 1, wherein the third or fourth molding is manufactured by cutting off the coating portion at a step before the step of manufacturing the molding. 3. The method according to claim 1, wherein the covering portion covers the embedded decorative member. 4. The method according to claim 1, wherein the extruders for supplying the resin to the common-portion extrusion holes and the additional-portion extrusion holes are the same or different.