JP2003340839A - Cast molding apparatus and molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new cast molding apparatus capable of corresponding to a molded article different in situations left and right or front and rear in common without generating trouble in the quality of the molded article and reducing the load of equipment or production, and a molding method using the same. <P>SOLUTION: A profile part molding part (7) is arranged to the almost central part of the cross section of a casting mold and resin injection parts (10) and (11) are arranged to both ends of the left and right or front and rear sheetlike part molding parts (8) and (9) while the left and right or front and rear sheetlike part molding parts (8) and (9) are made alternately tiltable upwardly and downwardly to provide a mold tiltable mechanism. A resin flow stop member (6) arranged to the sheetlike part molding part positioned upwardly by inclination is provided to be able to correspond to the left and right or front and rear situations in common by the injection of the resin from the resin injection port of the end part of the sheetlike part molding part positioned downward by inclination. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The invention of this application relates to a casting apparatus and a casting method. For more details,
TECHNICAL FIELD The invention of this application relates to a new cast molding apparatus and a cast molding method using the same, which can commonly perform molding of resin molded products having different right and left or front and rear.

[0002]

2. Description of the Related Art Conventionally, a cast molding method in which a thermosetting resin in a mold or a mixture of these and a filler or the like is injected and heated or heated and pressurized, and a molding apparatus therefor are known as various forms. Has been.

In this cast molding, a resin (including a resin mixture) (usually a resin mixture) is usually provided in the upper mold (1) and the lower mold (2) as shown in FIG. When injecting 3), in order to fill the resin (3) into the die without any air gaps, the die is lifted by the hydraulic jacking mechanism (4) or the like to raise the end side by about 2 to 3 The resin is injected from the resin injection port (5) located below by inclining by about 0 ° and molded. A resin flow stop member (6) made of EPDM resin, rubber or the like is arranged on the end side, and air is released from the air bleeding portion provided in this member, and this can be moved to change the size of the molded product. I am ready to respond.

[0004]

In the case of a flat plate-shaped part molded product, the above-mentioned conventional method can be sufficiently dealt with, but in the case of this conventional method, the deformed plate-shaped part is molded. There were problems to be improved in molding the product.

For example, as a kitchen counter or the like in recent years, for example, as shown in FIG. 4, for example, plate-shaped portions (B1) (B2) on the left and right sides or before and after the deformed portion (A) having steps.
Asymmetric resin molded products with different lengths have been cast-molded.However, in the case of such molded products, problems occur due to the difference in left / right or front / rear hand. is there.

For example, as illustrated in FIG. 5, in accordance with the conventional method, the longer plate-shaped portion (B1) side of FIG. 4 is inclined downward and resin is injected from the resin injection port (5) at the end thereof. And the plate-shaped part (B
In the case of molding a molded product having a length of 2) longer than that of the plate-like portion (B1) and having different left / right or front / rear directions, it is provided at the end of the shorter plate-like portion (B1) as illustrated in FIG. It is conceivable to inject a resin from another resin injection port (50) to perform molding. That is, as shown in FIG. 5 and FIG. 6, by performing the same mold forming apparatus and using the resin injection ports (5) and (50) provided at different positions properly, left and right or front and rear different molded products can be obtained. Molding is conceivable.

However, in the molding shown in FIG. 5, the presence of the resin injection port (50) provided separately causes insufficient heating due to circulation of hot water in this portion, resulting in poor temperature rise and uneven curing. There is a problem. On the other hand, FIG.
In the molding of, although the resin (3) can be injected from the resin injection port (50) provided separately, since the resin injection port (50) is close to the odd-shaped portion (A), the odd-shaped portion (A) However, there is a problem in that the pattern material easily accumulates, resulting in uneven pattern.

From the above, when molding a molded product as shown in FIG. 6, it is necessary to use a molding device having an inclination direction opposite to that of FIG. That is, each molding device is required depending on the left / right or front / rear.
This makes the production equipment and the burden of production extremely large.

Therefore, the invention of this application solves the conventional problems as described above, and even in the case of molded products having different left and right or front and rear, the quality of the molded products is commonly dealt with without any defect. It is an object of the present invention to provide a new cast-molding apparatus and a molding method using the same, which can reduce the burden of equipment and production.

[0010]

SUMMARY OF THE INVENTION The invention of this application is to solve the above-mentioned problems. Firstly, a resin molded product in which the lengths of the plate-shaped portions on the left and right or the front and rear of the deformed portion are asymmetric is poured. A molding device for mold molding, in which a deformed portion molding portion is arranged at a substantially central portion of a cross section of a casting mold, and resin injection ports are arranged at both ends of the left and right or front and rear plate portion molding portions. In addition, a mold inclining mechanism that allows one of the left and right or front and rear plate-shaped portion forming portions to alternately incline upward and the other downward, and is detachably arranged on the plate-shaped portion forming portion located above due to the inclination. It is equipped with a resin flow stop member, and it is possible to commonly handle left and right or front and back by injecting resin from the resin injection port at the end of the plate-shaped portion molding portion that is located downward due to the inclination. There is provided a cast molding apparatus characterized by the following.

Secondly, the invention of this application is a cast molding method using the above apparatus, wherein the plate-shaped portion of the die for molding a longer plate-shaped portion is tilted downward. And a resin is injected from a resin injection port at the end thereof to perform molding.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention of this application has the characteristics as described above, and the embodiments thereof will be described below.

1 and 2 of the accompanying drawings are schematic cross-sectional views illustrating the invention of this application. For example, as illustrated in FIG. 1 and FIG. 2, the casting apparatus of the invention of this application casts a resin molded product in which the lengths of the plate-shaped portions on the left and right sides or the front and rear sides of the deformed portion are asymmetrical. In the molding apparatus of the above, a deformed portion molding portion (7) is arranged substantially at the center of the cross section of the casting dies of the upper die (1) and the lower die (2), and the plate-shaped portion is formed on the left, right, front or rear thereof The resin injection ports (10) and (11) are arranged at both ends of the portions (8) and (9), and
One of the left and right or front and rear plate-shaped part forming parts (9: FIGS. 1, 8:
The mold inclining mechanism is provided so that the other (8: FIG. 1, 9: FIG. 2) can be alternately tilted downward (FIG. 2) and upward. The tilting mechanism may be of various types. For example, FIGS. 1 and 2 illustrate a hydraulic jacking mechanism (4) and a pivotal rotation mechanism (12) whose tilt can be changed alternately. Has been done.

In the casting apparatus of the invention of this application, for example, in the example of FIG. 1, the resin flow stop member (6) is detachably arranged in the plate-shaped portion molding portion (9) located above due to the inclination. ) Is provided, and molding is performed by injecting the resin from the resin injection port (10) at the end of the plate-shaped portion molding portion (8) located below due to the inclination. On the other hand, an inclination opposite to this is performed as shown in FIG. 2 and is used for molding. From the above, the casting apparatus of the invention of this application can be commonly used for left and right or front and rear.

In the above-described molding apparatus, in the invention of this application, for example, in the example of FIG. 1, the plate-shaped portion molding portion (8) for molding a longer plate-shaped portion is positioned downward by an inclination, and its end is formed. The resin (3) is injected from the resin injection port (10) of the part to be molded. Further, in the example of FIG. 2, the plate-shaped portion molding portion (9) for molding a longer plate-shaped portion is positioned at the lower side by inclining it opposite to that of FIG. 1, and the resin injection port ( 1
Resin (3) is injected from 1) and molded.

Although the resin molded product according to the example of FIG. 1 and the resin molded product according to the example of FIG. 2 have a left-right or front-rear handedness reverse relationship, the molding apparatus can be shared by changing the inclination. You can By using this device, even if the same common device is used, uneven curing and pattern unevenness as in the past do not occur, and a molded product with no defect in performance and quality can be molded. Become.

It should be noted that, in the molding in both cases of FIG. 1 and FIG. 2, the inclination can be about 2 to 3 ° as a standard as in the conventional case, but the inclination is not limited to this. It can be appropriately determined in consideration of the type and composition of the resin (mixture thereof) and conditions such as heating temperature.

Further, as illustrated in FIG. 1 and FIG.
A resin flow stop member (6) that also has an air bleeding function by connecting tubes etc. is arranged on the end side that is located above due to the inclination.
It can be made of DM resin or rubber.

By the molding apparatus and molding method of the invention of this application as described above, vinyl ester, polyester,
In molding a resin molded article such as a kitchen counter from a mixture of an acrylic resin or the like and a filler such as aluminum hydroxide or calcium carbonate, for example, an injection pressure of 3 to 4 k
Depending on the g / cm ^{2 level,} it is possible to commonly deal with cases where the right and left or the front and rear are different in handedness.

Of course, without being limited to the above examples, it goes without saying that the present invention of this application allows various forms in its details.

[0021]

As described above in detail, according to the invention of this application, the conventional problems are solved, and even if the molded products are different in right and left or front and back, the quality of the molded products is common without any trouble. Provided are a new cast-molding apparatus and a molding method using the cast-molding apparatus, which can cope with the burden on equipment and production.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view illustrating an embodiment of the invention of this application.

FIG. 2 is a schematic cross-sectional view illustrating an embodiment in which the inclination is opposite to that in the case of FIG.

FIG. 3 is a schematic cross-sectional view illustrating the molding of a conventional flat plate-shaped molded product.

FIG. 4 is a perspective view illustrating a kitchen counter as an example of a molded product having a deformed portion (A).

FIG. 5 is a schematic cross-sectional view exemplifying the molding of a deformed shaped product by a conventional device.

FIG. 6 is a schematic cross-sectional view illustrating, together with FIG. 5, molding of a conventional irregularly shaped product.

[Explanation of symbols]

1 Upper mold 2 Lower mold 3 resin 4 Hydraulic jack mechanism 5 Resin injection port 6 Resin flow stop member 7 Deformed part forming part 8, 9 Plate shaped part 10, 11 Resin injection port 12 Shaft support rotation mechanism A variant section B1, B2 Plate part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masato Sano             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works             Within the corporation F-term (reference) 4F202 CA01 CB01 CC07 CK06 CK11                 4F204 AA41 AA43 AB11 EA03 EF01                       EF27 EF49

Claims (2)

[Claims] 1. A molding apparatus for casting a resin molded product in which plate-shaped portions on the left and right or front and back of the deformed portion have asymmetric lengths, wherein the deformed portion is formed substantially at the center of the cross section of the casting die. The resin injection ports are arranged at both ends of the left and right or front and rear plate-shaped portion molding portions, and one of the left and right or front and rear plate-shaped portion molded portions can be alternately inclined upward and the other downward. And a resin flow stop member detachably arranged in the plate-shaped portion molding portion located above due to the inclination, and the end portion of the plate-shaped portion molding portion located below due to the inclination is provided. A cast molding apparatus characterized in that it is possible to commonly handle right and left or front and rear by injecting resin from a resin injection port. 2. The casting method by the apparatus according to claim 1, wherein a plate-shaped portion of a die for molding a longer plate-shaped portion is positioned downward by an inclination, and a resin of an end portion thereof is provided. A casting method in which a resin is injected from a pouring port for molding.