JPS6025724A - Manufacture of synthetic resin gutter with reinforcing core - Google Patents

Abstract

PURPOSE:To reduce remarkably the occurrence of wrinkles or imbalance of the configuration of lug sections, by separating a reinforcing core for a gutter into a core material for reinforcing a barrel section and core materials for reinforcing lug sections, and associating them before a step of covering with a synthetic resin. CONSTITUTION:A belt-shaped core material 10 is formed by a molder A into the shape of a gutter, that is, a core material 1 for reinforcing a barrel section, the core material 1 having opposite side sections 11, 11. Rodlike core materials 2 having longitudinal recesses 21 for reinforcing lug sections are fitted onto the side sections 11, 11 of the core material 1. Then all the circumferences of the core materials 1, 2 in a synthetic resin extruder are covered with an extruding synthetic resin material.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing synthetic eaves gutters with reinforced sleeves.

In recent years, various rain gutter components have been extremely often made of synthetic resin, but for rain gutter components that require mechanical strength, such as eaves gutters, metal cores etc. are used within the thickness. Enclosing and reinforcing it has also become a common practice. A typical example of such a reinforcing core synthetic resin eaves gutter is the eaves gutter t shown in the longitudinal cross-sectional view of FIG. This eaves gutter t is made by continuously introducing a belt-shaped metal plate into a roll forming machine, and gradually bending it as it progresses, forming ears ml and ml on both sides in the width direction, and shaping the whole into a core of the desired eaves gutter shape. It is generally manufactured by molding the material m, then introducing it into a synthetic resin extrusion molding machine represented by a cross die, and coating the entire circumference with synthetic resin r.

The manufacturing method for such eaves gutters is very important! Although it is superior to the fourth grade in that it can be produced efficiently, it also has the following problems in terms of manufacturing work. In other words, when introducing the core material into a roll forming machine, if it deviates slightly in the width direction from the normal introduction position, the edges of both (lits ml
, an unbalance occurs in the shape of the ml, which affects the quality of the product, so the work involved in this introduction process is
A high degree of skill was required of those in charge, which placed an excessive mental burden on them.

In addition, the core material moving inside the roll forming machine is applied in the advancing direction,
The strain stress is concentrated at the sharply bent ears, as shown in Figure 2 (c).
Wrinkles m2 as shown in the figure often appear. These wrinkles m2... remain as uneven surfaces even after synthetic resin coating and cause a significant decrease in product value, so various measures have been taken at the manufacturing site to reduce the occurrence of wrinkles rn9... is done, but its valid iI
L't: There were no mistakes, and the reality was that we had no choice but to rely solely on the skill of the workers.

The present invention was made in view of the above, and by dividing the reinforcing core of the eaves gutter into a trunk reinforcing core material and an ear reinforcing core material, and combining the two before the synthetic resin coating process, The aim is to eliminate the above manufacturing problems.

Embodiments of the present invention will be explained based on page 1 of the attached book.
Figure 4 shows a 70-chart diagram showing a typical example of the method of the present invention.
Figure tX), (Yl, (Z) are the lines x-X and Y-
FIG. 5 is an enlarged view of the Y line section in FIG. This is a similar figure to Figure 5. That is, the present invention involves a step (υ) of forming a belt-shaped core material 1O into an eave gutter shape using a molding machine to form a trunk reinforcing core material 1 (υ) and the above-mentioned reinforcing core material 1.
A cavity 21ff into which both widthwise ends 11.11 can be inserted:
A process (10 and,
It is characterized by comprising a step 0Il) of covering the entire periphery of the core material 1 for reinforcing the torso and the core material 2 for reinforcing the ear portions with a synthetic resin extrusion material 30 in a synthetic resin extrusion molding machine B. This is a method for manufacturing a reinforced container made of resin eaves gutter. In FIG. 3, a core 44' introduced into a molding machine (I: I-L molding machine) A is shown.
Reference numeral 10 indicates a wrapped long strip-shaped thin iron plate, but other reinforcing core materials such as paper or glass fibers or resin-supported core materials may also be used. The core material 1O that is heated is introduced into the roll forming machine A, and as it progresses, it is gradually formed into a semicircular or square shape by forming rolls a... to form the core material 1 for reinforcing the body part. The two ear reinforcing core materials 2゜2 are also introduced into the body reinforcing core materials 1, and are fitted onto both widthwise ends 11.11 of the trunk reinforcing core materials 1 through their cavities 21.21. FIG. 4 (3), (YJ, (see ZJ). This core material 2 for reinforcing the ear portion is made by bending a band-shaped iron plate to form an open ring-shaped cylinder (not shown), or the inner surface of this cylinder is covered with a synthetic resin 22 (Fig. 5), and a solid body of hard synthetic resin with groove-shaped cavities 21 recessed in the longitudinal direction (Fig. 6).
In addition, the sixth cause is a core material 2 in which a rod-shaped iron core 28 is buried (Fig. 7), or, although not shown in the figure, a cylindrical body or a frame made by bending the above iron plate (Fig. 5). A material in which the hollow part of the core material 2 shown in FIG. The trunk reinforcing core material 1 and the ear reinforcing core material 2 are made using synthetic resin extrusion molding machine B [
For example, before introducing the cross-die extrusion molding machine (M), they are combined as described above, and the two proceed cooperatively, and the outer periphery thereof is covered with a synthetic resin extrusion material 80 in the molding machine B, and the synthetic resin layer 3
Incidentally, such a core material 1. ? Obtain a synthetic resin eaves gutter Tf with reinforcement embossed.

In the above manufacturing process, even if the core material 10 introduced into the roll forming machine A is slightly shifted in the width direction from the normal introduction position, both ends 11, 11 in the width direction of the molded core material 1 for reinforcing the body part is inserted into the cavity 21, j21 of the ear part sleeve strength core (No. 2.
1, and the entire circumference is covered with an extruded synthetic resin material 80, thereby creating a continuous eave gutter T with a constant appearance and quality. In addition, since the forming of the core material l for reinforcing the trunk does not involve forming the ears that require sharp bending, the concentration of strain stress as described above is less likely to occur, and the occurrence of wrinkles is significantly reduced. However, since it is accommodated within the cavity 21 of the ear reinforcing core material 2, this does not affect the appearance of the product. Therefore, workers engaged in such a manufacturing process are not required to have the same level of skill as in the past, and the mental burden of maintaining consistent Yume 5 quality is greatly reduced.

In the figure, the core material 2 for reinforcing the ear part is introduced into the roll forming machine A and the two are combined together with the molding of the core material 1 for reinforcing the body part, but the roll forming machine and synthetic resin extrusion molding If there is a space between aB and aB, they may be combined together along this space. In addition, when using a material with poor flexibility such as ceramics as the core material 2 for reinforcing the ear part, it is naturally desirable to make this into a standard size material and combine it before the synthetic resin extrusion molding aB. It is.

As described above, in the method of the present invention, the core material sealed in the resin layer of the synthetic resin eaves gutter is divided into the core material for reinforcing the trunk and the core material for reinforcing the ears, and the core material for reinforcing the trunk is molded. After that, by combining the two, the above-mentioned manufacturing problems are significantly reduced and smooth production is guaranteed. Furthermore, since a material different from that of the core material for reinforcing the trunk can be selected as the core material for reinforcing the ears, the characteristics of the ears can be set without being affected by the core material for reinforcing the trunk. In particular, eaves gutters made by Kujobei's method, in which ears are also formed by bending a band-shaped iron plate, have a major drawback in that the base of the iron plate is exposed inside the ears, making it susceptible to rust. In the present invention, as described above, a metal cylinder whose inner surface is coated with resin, a synthetic resin or ceramic solid body, etc. can be freely selected as the core material for reinforcing the ear portion. Even if it is made of metal, the conventional drawbacks of the ears are eliminated, and the quality of the resulting eaves gutter is also greatly improved. As described above, the present invention has many benefits, and it can be said that the present invention is extremely useful industrially.

[Brief explanation of the drawing]

Figure 1 is a longitudinal cross-sectional view of a synthetic resin eaves gutter with a reinforced core made by the conventional method, and Figures 2 (a) and (b) are enlarged longitudinal cross-sectional views showing an example of the core material ears made by the conventional method. (C) is a partially enlarged perspective view showing an example of the function, FIG. 3 is a 70-chart showing a typical example of the method of the present invention, and FIG. Figure 5 is an enlarged view of the V line section in Figure 8, and Figures 6 and 7 are eaves gutters obtained by the method of the present invention. The fifth example shows another example of
It is a figure similar to the figure. (Explanation of symbols) l... Core material for trunk reinforcement, 10... Band-shaped core material, 11
... Both ends in the width direction, 2... Core material for reinforcing the ear portion, 21.
- Cavity, 80...Synthetic resin extrusion material, A...Roll molding machine, B...Synthetic resin extrusion molding machine 6 One or more- Applicant Takiron Co., Ltd. Agent Patent attorney Hidehiko Matsuno

Claims (1)

[Claims] A step of forming a round belt-shaped core material into an ail shape using a molding machine to form a trunk reinforcing core material, and having a cavity in the longitudinal direction into which both widthwise ends of the reinforcing core material can be inserted. A step of fitting a hollow or solid rod-shaped ear reinforcing core material into the cavity along both ends in the width direction of the body reinforcing core material, and a step in a synthetic resin extrusion machine. Covering the entire circumference of the core material for reinforcing the body and the core material for reinforcing the ears with synthetic resin extrusion]-
■ A method for manufacturing eaves gutters made of synthetic resin with a reinforced core, characterized by comprising the following steps.