JPH07214241A - Molded goods formed by using pressure resistant collapsible core for molding - Google Patents

Abstract

PURPOSE:To obtain molded goods by using a pressure resistant collapsible core consisting of a collapsible material and specifying a method of removing this core. CONSTITUTION:The pressure resistant collapsible core 1 is formed by using the collapsible material, such as paper and grains, and is disposed between a cope 2 and a drag 3 to form a mold 4. A molding material, such as molten aluminum, synthetic resin or ceramic material is poured according to the material quality of molded goods into a cavity part 5, by which the desired molded goods are formed. The removal of the pressure resistant collapsible core 1 is executed by removing the removable parts and removing the remaining heat of the parts where the remaining heat is removable. The remaining parts are almost completely removed and dissipated by dissolution using a solvent, such as water, or combustion by heating, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product formed by using a pressure-resistant collapse core for molding, and in particular, a pressure-resistant collapse core without using a sand core which has been conventionally generally used as a core. By using a core, the range of core materials to be selected can be expanded, and molding products with a pressure-resistant collapse core for molding can be used to efficiently form a wide range of molded products without being restricted by the shape. The present invention relates to molded products such as cast products, plastic molded products, and ceramic molded products.

[0002]

2. Description of the Related Art Molding by molding methods such as casting adopted as a part of machine work, injection molding adopted as a part of plastic molding, and injection molding adopted as a part of ceramic molding In order to form a hollow part, an undercut part, etc., a product has heretofore been molded using a non-disintegrating core or a disintegrating core to obtain the molded product.

By the way, as the former (non-disintegrating core), there is a metal core, which is used not only in casting but also as a molding method such as injection molding adopted as a part of plastic molding or a part of ceramic molding. However, it has a problem that it cannot be used except for those that can be directly punched or deformed, and the range of use is limited to that of a specific shape.

As the latter (disintegratable core), a sand core is generally used in casting for obtaining a cast product among the above-mentioned molded products, but it is difficult to mold and easily disintegrates. Not only is it difficult to handle, but it is also difficult to meet the conflicting conditions of pressure resistance during casting and disintegration after casting.

Therefore, in recent years, in the casting, it has been proposed to obtain a cast product by casting using a core having a disintegrating coating on the surface of the sand core. Because of the points, I could not solve the problem.

That is, it is difficult and time-consuming to form a plurality of coating layers, and it is difficult to achieve the purpose. Further, it is difficult to completely remove after molding, and sand-baking is required. It takes time and money. In addition, sand cores are difficult to mold, require equipment and man-hours, are fragile, difficult to handle, require man-hours, have poor yield, require complicated pressure adjustment to prevent collapse, and after casting Since it is difficult to completely disintegrate, it requires a heat treatment process, a sand drop process, and a sand drop inspection, which requires man-hours and takes time and money. In addition, defective products such as cavities are generated in the cast product due to the insertion of the molten metal during casting and the penetration of sand core components into the cast product, resulting in poor casting yield, poor productivity, and the core after casting. It was difficult to completely remove the sand, and adhesion caused problems such as product wear and damage. Also,
Complex shapes and large ones are difficult or impossible to cast and have a limited range of applications, which hinders design and production. Furthermore, the sand of the sand core to be reused contains a coating layer and a binder, which is difficult to completely remove, which is time-consuming and expensive. In addition, since the sand core is difficult to mold, handle, and disintegrate after casting, many steps are required, the yield is poor, and it takes a lot of time and cost.

[0007] Further, in the same way as the above-mentioned casting, various molded articles can be molded by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding. There was a problem.

For example, the core must be formed of a specific material having pressure resistance and heat resistance during molding, which makes core molding difficult and costly. There was a problem.

For this reason, in order to solve these problems, during molding used to first form a hollow shape or an undercut shape into a molded product such as a cast product, a plastic molded product or a ceramic molded product. In a child, the molding core is formed of a synthetic resin (plastic), a molding special core, a molding method using the molding special core, and the special core Molded molded products have been proposed, but depending on the size and shape of the molded product, the cost may increase, and depending on the properties of the molded product such as the wall thickness of the molded product, sink marks, wrinkles, and porosity There is a problem that molding defects such as the above may occur.

Therefore, as a result of continued research, an optimum pressure resistant collapse core for molding which can solve these various problems, a molding method using the pressure resistant collapse core for molding, and the pressure resistance It was possible to investigate a molded product molded using the disintegrating core.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by adopting the following constitution.

That is, for example, in casting to obtain a cast product among the above-mentioned molded products, a molding die is formed using a core having pressure resistance formed of a collapsible material, and the molding die is used. By forming a molded product using a pressure resistant collapse core for molding, the conditions such as pressure resistance and heat resistance required are relaxed, and the selection range of core materials is expanded. The pressure resistance and heat resistance can be adjusted by selecting the material and quantity, and the core molding and the handling are facilitated to reduce man-hours, time and cost.

Further, by using a pressure-resistant disintegrating core that does not use a permeating component such as a binder, and preventing the core component from penetrating into a cast product, the occurrence of defects such as cavities is prevented, Prevents the occurrence of defective castings, contributes to yield improvement and productivity improvement, and also avoids the occurrence of problems such as molten metal insertion during molding while maintaining pressure resistance (non-collapseability),
Further, it facilitates the disintegration of the core after molding and the removal of the core component, prevents the core from adhering to the molded product, and prevents the molded product from failing such as abrasion or damage.

Furthermore, a pressure-resistant collapse core for molding is used,
By making it easy to form hollow parts and undercut parts, and improving core strength, it is possible to cast all shapes and sizes regardless of shape and size, expanding the range of application and increasing the viscosity. The absence of binders and other difficult-to-remove components facilitates the collapse and removal of the core after casting, prevents the occurrence of pollution, reduces the number of steps, and reduces the time and cost.

Further, even when a molded article is obtained by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding, the above-mentioned pressure resistance for molding is obtained. By using the disintegrating core, a desired molded product is obtained, and a molded product excellent in quality is efficiently obtained.

With the structure of the pressure-resistant collapse core for molding, even in the case of plastic molding or ceramic molding, by forming a molded product using the pressure-resistant collapse core for molding, productivity is improved. To increase the scope of application and expand the scope of application, and to use pressure-resistant collapse cores for molding, as in the case of the above casting, to facilitate the molding of the core, simplify the molding equipment, and In addition to reducing the time and cost, facilitating handling, facilitating transportation and storage, and reducing the number of man-hours such as not requiring pressure adjustment during molding, the time and cost can be reduced. Resolve conventional problems.

The present invention prevents molding defects such as sink marks, wrinkles, and porosity with a simple structure and has a hollow shape, an undercut shape, or the like, or a large-sized molded article or a molded article having a complicated shape. In addition to enabling the molding of a wide variety of molded products, the quality of the molded products is improved, and the productivity of the molded products is dramatically improved, resulting in significantly lower costs and casting products. Another object of the present invention is to provide a molded product formed by using a pressure-resistant collapse core for molding, which enables efficient molding of a molded product such as a plastic molded product and a ceramic molded product.

[0018]

According to the present invention, such an object is to use a pressure-resistant core formed of a collapsible material such as paper, fiber or grain as the core, It is formed by forming a molding die such as a mold, a plastic molding die or a ceramic molding die, and molding a molding product such as a cast product, a plastic molding product or a ceramic molding product using the molding die. It is achieved by providing a molded article molded using the pressure-resistant collapse core for molding.

[0019]

According to the present invention as described above, there are the following actions.

That is, according to the present invention, a molded article is molded by using a molding pressure-resistant collapse core as a core, and a molded article is molded using the molding pressure-resistant collapse core. The idea is to improve productivity and expand the scope of application, and to efficiently obtain molded products of excellent quality.Using collapsible materials such as waste paper, which is often discarded, as raw materials, By molding and using the pressure resistant collapse core for molding, it is possible to significantly reduce the material cost compared to the case of using a conventional sand core or resin core. In addition, there is, for example, a molding pressure-resistant collapse for molding to obtain a cast product among the molding pressure-resistant collapse cores used to form molded products such as the above-mentioned cast products, plastic molded products, and ceramic molded products. Molded using a core Shaped piece, in the case of uses molding pressure resistance collapsible core, relaxes the required pressure resistance and conditions such as heat resistance, in addition to be a larger selection of core material,
The pressure resistance and heat resistance of the core can be adjusted by selecting the material and its amount, and the time and cost can be reduced by facilitating the core molding, simplifying the molding equipment, and reducing the process. You can

Further, since the pressure-resistant collapse core is used and the strength is improved, the man-hours such as handling, transportation and storage are facilitated, the time and cost can be reduced, and the pressure-resistant collapse core is a binder. Since it does not contain permeation components such as, the core components are prevented from permeating into the molded product, which prevents the occurrence of defects such as cavities, prevents the defective products from forming, and improves the yield. Therefore, productivity can be improved.

Further, using a pressure resistant collapse core for molding,
It is easy to form hollow parts and undercut parts that were not possible in the past, and since core strength is improved, it is possible to mold all shapes and sizes regardless of shape and size. Can be expanded. In addition, by using a core that has the reciprocal conditions of pressure resistance during molding and disintegration such as disappearance after molding, it is possible to avoid problems such as inserting molten metal during molding and to withstand pressure (non-collapse). Property), and facilitates the disintegration such as the disappearance of the core after molding and the removal of core components, prevents the adherence to the molded product, and prevents the molded product from being worn or damaged. It is possible to prevent the occurrence of defects.

Furthermore, since the pressure-resistant disintegrating core does not contain a difficult-to-remove component such as a binder and has a disintegrating property after molding, the core can be easily removed to prevent pollution. In addition, the number of steps can be reduced and the time and cost can be reduced.

Furthermore, even when a molded product is obtained by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding, the above-mentioned molding pressure resistance is used. By using a disintegrating core, and by further specifying the method for removing the pressure-resistant disintegrating core for molding, the desired molded product is obtained, and a molded product with excellent quality can be efficiently obtained. You can

Further, according to the constitution of the molded product molded by using the molding pressure-resistant collapse core, it is possible to improve the productivity and expand the applicable range even in the case of plastic molding or ceramic molding. As in the case of the above casting, by using the pressure resistant collapse core for molding, molding of the core becomes easy, molding equipment is simplified, and the process is reduced, and the time and cost are reduced. That you can
It has various effects such as easy handling, easy transportation and storage, reduced man-hours such as no need for pressure adjustment during molding, and time and cost reduction.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

1 to 4 show a first embodiment of a molded product molded using the molding pressure-resistant collapse core of the present invention.

That is, the present invention does not use a sand core, which is generally widely used as a core, and is a collapsible material such as paper, fiber or grain which is usually considered to be difficult or unusable. Molding dies such as molds, plastic molding dies, and ceramic molding dies are formed by using a molding core having pressure resistance formed from, and the molding dies are used for castings, plastic moldings, and ceramic moldings. A molded product formed by molding a molded product such as a molded product using a pressure-resistant collapse core for molding.

In the present invention, as the pressure-resistant collapse core for molding, a pressure-resistant molding core formed of a collapsible material is used, and a mold, a plastic molding die, or a ceramic is used. A molding die such as a molding die is formed, and a desired molded article is obtained using the molding die.

Then, a molded product such as a cast product, a plastic molded product or a ceramic molded product is molded by molding using a mold using the pressure resistant collapse core for molding.

Therefore, the pressure-resistant collapse core for molding used in the present invention has non-disintegration properties such as heat resistance and pressure resistance at the time of molding for molding a molded product, and after molding,
It is also required to have a disintegrating property such as disappearance (removability) that is removed by a solvent such as water.

Further, the pressure-resistant collapse core for molding is required to have a condition that does not exert a bad influence on a molded product such as generation of a large amount of gas at the time of molding.

As a result of continuing research, the applicant of the present invention has found that a disintegratable material is suitable as the pressure-resistant disintegrating core for molding. A molded product molded by using the pressure-resistant collapse core for molding will be described.

A core 1 made of a disintegratable material as a pressure-resistant disintegrating core which is the molding core (hereinafter referred to as "pressure-resistant disintegrating core") 1 is a disintegratable material such as paper, fiber or grain. Are formed from.

The pressure-resistant collapsing core 1 is formed of a collapsible material into a solid shape having pressure resistance, as shown in FIG.

Therefore, the pressure-resistant pressure-resistant collapse core 1 has non-disintegration properties such as heat resistance and pressure resistance at the time of molding for molding a molded product, and after molding, a solvent such as water is used. It is formed to have a disintegrating property such as disappearance (removability) that is eliminated and removed by.

The pressure-resistant collapse core 1, which is the pressure-resistant collapse core for molding, can be used to form a molded product such as a cast product, a plastic molded product, or a ceramic molded product.

For example, when a pressure-resistant collapse core 1 which is the pressure-resistant collapse core for molding is used to mold a molded product such as a cast product, a plastic molded product or a ceramic molded product, it is often possible to obtain the result shown in FIG. As shown, the pressure-resistant collapse core 1 can be disposed between the upper mold 2 and the lower mold 3 to form the mold 4 having the cavity 5.

Next, as best shown in FIGS. 1 and 2, a material suitable for the material of the molded product is injected into the cavity 5 formed in the molding die 4 while pressurizing.

At this time, the pressure-resistant disintegrating core 1 contributes to the formation of a desired molded product 6 by maintaining its shape at the time of molding, and is dissolved by a solvent such as water after molding. Since it is removed and eliminated, no residue remains, which can contribute to the molding of a molded product having excellent quality such as smoothing the inner surface.

Subsequently, as well shown in FIGS. 2 and 3, the molded product 6 formed as described above is taken out from the molding die 4 to complete the molding.

Although not shown in the drawing, unnecessary parts such as burrs of the molded product 6 can be removed to obtain a finished product.

In the molded product 6 thus formed, the pressure-resistant collapse core 1 which is the pressure-resistant collapse core for molding is formed of a collapsible material such as paper, fiber, grain, and the like. Since the pressure-resistant collapse core 1 has a smooth surface, the inner surface of the hollow portion or the undercut portion is formed into a smooth surface without a rough surface. Therefore, the secondary processing for smoothing the inner surface is not necessary, and it is possible to prevent the occurrence of defects in the molded product such as wear and damage of the molded product. Can be improved. Further, even if the conventional die-cast casting is impossible, the die-cast casting can be performed, so that the cost can be significantly reduced by reducing the weight and improving the productivity. Furthermore, by preventing adverse effects on the molded product by eliminating adverse effects on the molded product and improving dimensional accuracy, it becomes possible to obtain a molded product with excellent quality.

The pressure-resistant collapse core 1 used to obtain the molded product 6 is as follows.

That is, first, there is a core made of a paper material such as waste paper. For example, a paper material such as waste paper is dispersed with water or the like as a medium, and then pressure-molded to form a predetermined shape. ,
Further, it can be dehydrated and dried to form the pressure-resistant collapse core 1 having a predetermined shape.

The pressure-resistant disintegrating core 1 thus formed becomes rigid and has a non-disintegrating property such as pressure resistance and heat resistance at the time of molding a molded product, and after molding, It has disintegration such as disappearance (removability), and when the molded product is molded, it retains its shape to contribute to the formation of the desired molded product 6, and after molding, Due to the disintegration property, it is dissolved and removed by a solvent such as water so that no residue remains.

In this case, the pressure-resistant disintegrating core 1 has a non-disintegrating property such as pressure resistance and heat resistance at the time of molding of a molded product, and has a disintegrating property such as disappearance (removability) after molding. Since it is provided with the condition that the molded product is not adversely affected such that a large amount of gas is generated at the time of molding, it can contribute to efficiently obtain a molded product having excellent quality.

The pressure-resistant collapse core 1 which is the pressure-resistant collapse core for molding can be used to form a desired molded product 6.

At this time, since the pressure resistant collapse core 1 has a large heat capacity, it has high heat resistance against injection of a molding material such as molten metal, and also has high pressure resistance. The initial shape can be maintained without thermal deformation or pressure deformation even by pouring or the like.

Further, the temperature of the molten metal or the like is an initial temperature (for example, by the time it reaches the cavity 5 of the molding die 4 such as the above-mentioned mold).
Since the temperature of aluminum molten metal is much lower than that of approximately 660 ° C, the pressure-resistant collapse core 1 is
Even if the molten metal or the like acts due to its own temperature and heat capacity, the initial shape can be maintained without immediately disappearing due to the reflection effect and the temperature effect.

Therefore, the molded product 6 having a shape corresponding to the shape of the hollow portion 5 is molded in a state where the original shape is maintained without deforming the pressure resistant collapse core 1.

In this case, for removing the pressure-resistant collapse core 1, for example, water is supplied to the pressure-resistant collapse core 1 in the casting 6 which is a molded product, and the pressure-resistant collapse core 1 is immersed in water. Then, the pressure-resistant disintegrating core 1 is dissolved with water, and in a muddy state, it is discharged to the outside of the cast product 6 which is a molded product, whereby the cast product 6 can be removed and eliminated.

The pressure-resistant collapsible core 1 is not limited to the core made of paper material such as waste paper described above, but can be made of other collapsible materials.

For example, as the pressure-resistant disintegrating core 1, there is a core made of grains such as rice, which includes grains such as rice, millet, acne and corn, which are heated with water or the like. After imparting viscosity, pressure molding is performed to form a predetermined shape, and further cooling is performed to form the pressure resistant collapse core 1 having pressure resistance of the predetermined shape.

At this time, for example, in the case of using glutinous rice, after heating with water or the like to give viscosity, pressure molding is performed to form a predetermined shape, and further cooling is performed to collapse pressure resistance of the predetermined shape. Since the child 1 can be formed, and the pressure-resistant collapsing core 1 becomes rigid so that it does not break unless it is broken with a hammer, it does not collapse in pressure resistance and heat resistance during molding of a molded product. In addition to having the property, after molding,
It has disintegration such as disappearance (removability) and conditions that does not adversely affect the molded product such as generating a large amount of gas at the time of molding. Be able to contribute to gaining.

Then, the pressure-resistant collapse core 1 which is a pressure-resistant collapse core for molding can be used to form a desired molded article.

Further, there is a core made of a material obtained by mixing a plurality of disintegratable materials, for example, a material obtained by mixing a paper material such as waste paper and a grain such as rice. The pressure-resistant collapse core 1 having pressure resistance of a predetermined shape can be formed by pressure molding.

The pressure-resistant collapsible core 1 is not limited to these, and may be any pressure-resistant collapsible molding core made of a collapsible material. The pressure-resistant collapse core 1 having pressure resistance of a predetermined shape can be formed by pressure molding.

In the present embodiment, the pressure-resistant collapse core for molding is characterized in that a molded product such as a cast product, a plastic molded product, or a ceramic molded product is molded using the above-mentioned pressure-resistant collapse core for molding. A case will be described in which a cast product is obtained by casting using a pressure-resistant collapse core among the molded products formed by using the child.

Here, there will be described a case where die casting is performed as one of the cases where the casting is performed, and a case where a pressure resistant collapse core is used as the molding core.

That is, in this embodiment, casting is performed in the following steps.

First Step First, although not shown in the drawings, a solid shape pressure-resistant collapse core having pressure resistance as shown in FIG. 4 using a material capable of collapsing in the same manner as described above is used. Mold 1.

The pressure-resistant disintegrating core 1 has non-disintegrating properties such as heat resistance and pressure resistance at the time of molding a molded product, and is removed and disappears by a solvent such as water after molding. It is formed to have a disintegrating property such as property (removability).

Second Step Subsequently, as shown in FIG. 1, the pressure-resistant collapse core 1 is disposed between the upper mold 2 and the lower mold 3, and the cavity 5 is formed.
Forming a mold 4 having

Third Step Next, as best shown in FIGS. 1 and 2, pressure is applied to the molten metal such as aluminum molten metal in the cavity 5 formed in the mold 4 depending on the material of the cast product. Pouring while adding.

At this time, since the pressure-resistant collapse core 1 has a large heat capacity, it has a high heat resistance to the molten metal, and also has a high pressure resistance, so that even if the high-pressure molten metal is poured during molding, The initial shape can be retained without deformation or pressure deformation.

Further, the temperature of the molten metal is considerably lower than the initial temperature (for example, about 660 ° C. in the case of aluminum molten metal) by the time it reaches the cavity 5 of the mold 4, so that Due to its own temperature and heat capacity, the pressure-resistant collapse core 1 can maintain its initial shape without immediate melting due to the reflection effect and the temperature effect even if the molten metal acts.

Therefore, the casting 6 having a shape corresponding to the shape of the cavity 5 is cast in a state where the original shape is maintained without deforming the pressure-resistant collapse core 1.

The pressure-resistant collapsible core 1 contributes to the formation of a desired casting 6 by maintaining its shape during casting, and is dissolved by a solvent such as water after casting. Since it is removed and eliminated, no residue remains, which can contribute to the casting of a cast product having excellent quality such as smoothing the inner surface.

In this case, in the present embodiment, the pressure resistant collapse core 1 is removed by, for example, supplying water to the pressure resistant collapse core 1 in the cast product 6 which is a molded product, By immersing the core 1 in water, dissolving the pressure-resistant collapse core 1 with water, and leaving it in a muddy state, it is discharged to the outside of the cast product 6 that is a molded product, so that it is removed from the cast product 6 and disappears. You can

The pressure-resistant disintegrating core 1 is removed by burning the residual heat alone or in combination with the residual heat or the heating or the heating alone depending on the shape and size thereof. It is also possible to remove and disappear from within 6.

At this time, as a heating and removing method, there are heating by a burner, heating in a heating tank, and other heating methods. In any case, the pressure-resistant collapse core for molding after molding is completely heated by heating. Can be removed.

Further, the pressure-resistant disintegrating core after the molding can be removed by using both the removal by the solvent such as water and the removal by the heating.

The pressure-resistant disintegrating core 1 can be dissolved and removed by using other solvent, particularly an organic solvent, in combination with residual heat or heating, or by itself, in addition to the removal and disappearance by the water.

As the solvent, normal alkylbenzene (trade name "Nonion" or the like) was sufficiently satisfactory in terms of function and cost, and there was no problem in actual use.

Other solvents include the following.

For example, tetrachloroethane, methylene chloride, chloroform, 1,1,2 trichloroethane, etc. were used, and similar effects could be obtained.

The solvent of the present invention is not limited to the solvent of the above-mentioned examples as long as it can dissolve the pressure-resistant collapse core for molding, and it goes without saying that various solvents can be used. The same effect as that of the above-described embodiment can be obtained by performing the heating with the residual heat or the heating alone.

Subsequently, as well shown in FIGS. 2 and 3, the casting 6 formed as described above is taken out from the mold 4, thereby completing the casting.

Fourth Step Further, although not shown, a finished product can be obtained by removing unnecessary parts such as burrs of the cast product 6.

Therefore, compared with the conventional casting method which required the following 10 steps, only 4 steps are required and 6 steps are omitted.

That is, the conventional method using the sand core is as follows.
It looks like this: (1) Core molding → (2) Core coating mold → (3) Core drying → (4) Mold formation → (5) Casting by pouring molten metal →
(6) Casting sand removal → (7) Casting sand heat treatment (sand baking) → (8) Casting sand removal inspection → (9) Casting deburring → (10) Finished product.

As described above, in the case of die casting which is the first embodiment of the molding method using the pressure resistant collapse core for molding of the present invention, the pressure resistant collapse core 1 has a shape By holding the above, it contributes to the formation of the desired casting product 6, and after casting, it is dissolved and removed by a solvent such as water, so that there is no residual portion, so that the inner surface is smoothed. It can contribute to the casting of high-quality cast products.

By casting the pressure-resistant collapse core 1 in a state where the original shape is maintained without being deformed, a cast product 6 having a shape corresponding to the shape of the cavity 5 can be obtained. .

In the cast product 6 which is the molded product thus formed, the pressure resistant collapse core 1 which is the pressure resistant collapse core for molding is formed from a paper material such as waste paper or a grain such as rice. Since the surface of the pressure-resistant collapse core 1 is formed to be smooth, the inner surface such as the hollow portion or the undercut portion which is in contact with the pressure-resistant collapse core 1 is also a cast product obtained by casting with a conventional sand core. The residual core component is prevented from adhering to form a smooth surface without a rough surface. Therefore, secondary processing such as mechanical processing for smoothing the inner surface is unnecessary, and the number of steps is reduced.
The labor and cost can be reduced. Therefore,
When the casting 6 is used, the smooth inner surface
It is possible to prevent the occurrence of molding defects such as wear and breakage of the molded product, and to improve the performance of the product using the cast product 6 by reducing the resistance of circulating liquid or gas. You can

Further, according to the present invention, even a cast product which has been conventionally impossible to be die cast can be die cast, so that the weight of the cast product is higher than that of the cast product which is cast by the conventional gravity casting method. In addition to significantly reducing production costs, the production rate per hour can be improved, defective products can be prevented from occurring, and yields and productivity can be improved. it can.

Furthermore, by forming a molded product using the pressure-resistant collapse core for molding of the present invention, it is possible to avoid problems such as insertion of molten metal during molding, and
Since the core can be completely removed easily and the adverse effect on the molded product can be eliminated, it is possible to prevent occurrence of defective molded product such as wear and damage of the molded product.

Further, since the shape-retaining function of the pressure-resistant collapse core for molding at the time of molding is improved, the shape can be held more reliably at the time of molding, so that a molded product having excellent dimensional accuracy and quality You can

Further, according to the present invention, the molding pressure-resistant collapse core used in the molded article molded using the molding pressure-resistant collapse core is removed by removing the part that can be extracted and by removing residual heat. Remaining heat is removed from the removable parts, and almost all of the remaining parts can be removed and dissolved by dissolving with a solvent such as water or burning by heating, so it is easy regardless of the type and shape of the cast product. Moreover, there is an excellent effect that the pressure-resistant collapse core for molding can be removed.

Further, the pressure-resistant disintegrating core 1 is prepared by pouring the molten metal into the hollow portion 5 and, after a predetermined time has passed, after the molten metal has cooled and solidified, the solvent such as water or residual heat or heating. Since it is removed and eliminated, the pressure-resistant collapse core 1 is removed from the molded product 6.
Can be easily removed.

At this time, since the pressure-resistant disintegrating core 1 is basically removed by a solvent such as water or residual heat or heat, no residue remains. However, depending on the shape, the solvent such as water or residual heat is removed. It can be reused by extracting the whole or a part and reprocessing it as the material of the pressure-resistant collapse core 1 without melting the whole by heating or heating, and can reduce the material cost.

When the pressure-resistant disintegrating core 1 is not fully removed or is difficult or impossible to remove due to residual heat, the pressure-resistant disintegrating core 1 can be completely removed by removing it with a solvent such as water or by heating. it can.

In this case, in this embodiment, the part that can be extracted is extracted, and the part that can remove residual heat is removed by residual heat, and the remaining part is removed by a solvent such as water or by heating. Disappear.

The pressure-resistant collapse core 1, particularly the pressure-resistant collapse core 1 that is removed and eliminated by a solvent such as water or heating,
A core with pressure resistance made of paper materials such as waste paper, for example, after dispersing paper materials such as waste paper with water as a medium,
There is a pressure-resistant core formed by press-molding to a predetermined shape and then dehydrated and dried, or a pressure-resistant core made of grains such as rice. ,
There are grains such as millet, acne, corn, etc., which are heated with water etc. to give viscosity and then formed into a predetermined shape,
There is a core with pressure resistance formed by further cooling,
Alternatively, a pressure-resistant core made of a material obtained by mixing a plurality of disintegratable materials, for example, a pressure-resistant core made of a paper material such as waste paper and grains such as rice, However, the invention is not limited to this, and any pressure-resistant collapse core made of a collapsible material and having pressure resistance may be used.

Each of these pressure-resistant collapse cores for molding is
The part that can be taken out is taken out, and the part that can remove residual heat is removed, and the remaining part can be almost completely removed by dissolution with a solvent such as water or combustion by heating.

Not only these pressure-resistant collapse cores,
Of course, if it is disintegratable by a solvent such as water or by heating, it can be applied to a pressure-resistant disintegrating core made of another material.

As described above, according to the molded product molded using the molding pressure-resistant collapse core of the present invention, it is possible to prevent defects such as wear and damage of the cast product 6, and to improve the quality. At the same time, the occurrence of defects such as porosity is prevented and the appearance quality and functional quality are excellent.
The yield is improved, and the man-hours are greatly reduced, so that the cast product 6 having excellent quality can be efficiently obtained. Therefore, time and cost can be saved and productivity can be improved. become able to do.

The molded article molded using the pressure-resistant collapse core for molding of the present invention is not limited to die casting as one of the casting methods shown in the above-mentioned examples, and is not limited to the die casting method. It is possible to further improve the quality of the cast product by adding a specific process, and the present invention is not limited to the above-mentioned embodiment, and many modifications can be considered.

In the above embodiment, the case of performing die casting as one of the casting methods was described, but the molding method using the pressure resistant collapse core for molding of the present invention is limited to the die casting. Needless to say, it can be applied to a cast product cast by a sand mold gravity casting method, a mold gravity casting method, a low pressure casting method, a precision casting method, or another casting method, and is as excellent as the above embodiment. You can get the effect.

In this case, the effect of the present invention is particularly great in the gravity casting method.

That is, in the gravity casting method, the residence time of the molten metal during casting is longer than that of other casting methods, the time in which the molten metal contacts the core is long, and the temperature of the molten metal is relatively high. In particular, the core is required to have pressure resistance and heat resistance, but when the molding pressure resistant collapse core 1 is used, it has a large heat capacity and is used for molding when pouring molten metal. Since the temperature rise of the pressure-resistant collapse core 1 is relatively small, the heat resistance to the molten metal is high, and the pressure resistance is also high, so that even if the molten metal having a long residence time at the time of casting is poured, thermal deformation or pressure deformation does not occur. In addition, the initial shape can be retained, and it can contribute to the formation of the intended casting product 6.

Even in this case, the pressure-resistant collapse core 1
Has a non-disintegrating property such as heat resistance and pressure resistance when casting a cast product, and has a disintegrating property such as disappearance (removability) that is removed and removed by a solvent such as water after casting. Since it is provided with the condition that it does not adversely affect the cast product such as generation of a large amount of gas at the time of casting, it can contribute to efficiently obtain a cast product having excellent quality.

The pressure-resistant collapse core 1 which is the pressure-resistant collapse core for molding can be used to form a desired cast product.

In this case, the pressure-resistant collapse core 1 is disposed between the upper mold 2 and the lower mold 3 to form the mold 4 having the cavity 5, and then the mold is prepared in the same manner as in the above-mentioned embodiment. The target molded product 6 can be molded by injecting the molding material into the hollow portion 5 formed inside 4.

In this case, since the temperature of the molten metal is considerably lower than the initial temperature by the time it reaches the cavity 5 of the mold 4, the pressure resistant collapse core 1 has improved pressure resistance. In combination with this, the temperature rise of the pressure resistant collapse core 1 when pouring the molten metal is relatively small due to its own temperature and heat capacity, the heat resistance to the molten metal is high, and the pressure resistance is also improved. Even when pouring the high-pressure molten metal at that time, the initial shape can be maintained without thermal deformation or pressure deformation such as immediate melting due to the reflection effect and the temperature effect.

Further, the pressure-resistant collapse core 1 is usually provided with the hollow portion 5
After pouring the molten metal into the molten metal for a predetermined time, the molten metal is cooled and solidified and then discharged and removed.

Thus, the removal of the pressure-resistant collapse core 1 is
Basically, the part that can be extracted is extracted, and the part that can remove residual heat is removed by residual heat, and the part remaining by these is removed and eliminated by a solvent such as water or by heating.

As a result, the pressure-resistant collapse core 1 is completely removed and disappeared without leaving a residue. However, depending on the shape, the whole or a part thereof is extracted and reprocessed as the material of the pressure-resistant collapse core 1. It can be reused and the material cost can be reduced.

Further, not only these pressure-resistant collapse cores for molding but also those having a disintegrating property can be applied to the pressure-resistant collapse core 1 made of other collapsible material.

The solvent of the present invention is not limited to the solvent of the examples as long as it can dissolve the pressure-resistant collapse core for molding, and it is needless to say that various solvents can be used. Alternatively, the same effects as those in the above-described embodiment can be exhibited by performing heating or heating alone.

The molded product molded using the pressure-resistant collapse core for molding of the present invention is not limited to the casting method of the above-mentioned embodiment, and many modifications are conceivable. Applicable to molding cores used in molding methods such as injection molding that is adopted as part of plastic molding, which is the molding method of, and molding methods such as injection molding that is adopted as part of ceramic molding. Similarly, various problems can be solved.

The pressure-resistant collapse core 1, which is the molding core, has non-disintegration properties such as pressure resistance and heat resistance at the time of molding of a molded product, and is extinguishable after molding. It has a disintegrating property such as (removability), and has a condition that does not adversely affect the molded product such as generating a large amount of gas at the time of molding. By maintaining the shape at the time of molding, It contributes to the efficient production of the desired molded product of excellent quality, and after molding, it is removed and eliminated by a solvent such as water or by heating, etc. It is possible to prevent defects such as damage and breakage, improve the quality of molded products, improve yield, save time and cost, and improve productivity. Become

Furthermore, the molded product molded by using the pressure-resistant collapse core for molding of the present invention is not limited to the case obtained by each of the above-mentioned molding methods, and the quality of the molded product is further improved by the addition of specific steps. It can be improved, and is not limited to the case of being obtained by the above-mentioned molding method, and many modified examples are possible.

Next, referring to FIGS. 1 to 4, a part of plastic molding which is a molding method other than the casting method which is the second embodiment of the molded article molded using the pressure resistant collapse core for molding of the present invention. A molded article formed by using a pressure-resistant collapse core for molding which is applied to a molding method such as injection molding adopted as above or a molding method such as injection molding adopted as a part of ceramic molding will be described.

That is, in this embodiment, as one of the molding methods using the pressure-resistant collapse core for molding, the pressure-resistant collapse core 1 is used as a molding method other than the casting method, such as plastic molding or ceramics. A case of applying to molding will be described.

First Step First, although not shown, in the same manner as in the above-described embodiment, as shown in FIG. 4 using paper materials such as waste paper or grains such as rice and other collapsible materials. First, the pressure-resistant collapse core 1 having a solid shape and pressure resistance is molded.

Second Step Subsequently, as shown in FIG. 1, the pressure-resistant collapse core 1 is disposed between the upper die 2 and the lower die 3 to form the cavity 5
Forming mold 4 having

Third Step Next, as shown in FIG. 1 and FIG. 2, a cavity 5 formed in a molding die 4 using the pressure resistant collapse core 1 is shown.
Depending on the material of the molded product, synthetic resin (plastic)
By injecting a molding material such as or ceramics while applying pressure, a molded product 6 having a shape corresponding to the shape of the cavity 5 is injection molded.

At this time, since the pressure-resistant collapse core 1 has a large heat capacity, the temperature rise upon injection of a molding material such as synthetic resin (plastic) or ceramic is relatively small, and the heat resistance is high. Moreover, since the pressure resistance is high, the initial shape can be maintained without thermal deformation or pressure deformation even by the high temperature at the time of molding, which can contribute to the formation of the intended molded product 6.

Further, since the temperature at the time of injecting the molding material is considerably lower than the initial temperature by the time it reaches the cavity 5 of the molding die 4, the pressure-resistant collapse core 1 is
Even if the high temperature acts due to its own temperature and heat capacity, the initial shape can be maintained without immediate melting due to the reflection effect and the temperature effect.

Therefore, the molded product 6 having a shape corresponding to the shape of the cavity 5 can be obtained in a state where the original shape is maintained without deforming the pressure-resistant collapse core 1.

Next, after the molding is completed, the molded product 6 formed as described above is taken out from the molding die 4.

At this time, the pressure-resistant disintegrating core 1 is basically removed by a solvent such as water or by residual heat or heating as in the case of the above-mentioned embodiment. Can be reused by extracting it in whole or in part and reprocessing it as a material for the pressure-resistant collapse core 1 without dissolving it in a solvent such as water or residual heat or heating, and reducing the material cost. Can be planned.

When the pressure-resistant disintegration core 1 is not fully removed or is difficult or impossible to remove due to residual heat, it can be removed entirely by being removed by a solvent such as water or by heating. it can.

In this case, in this embodiment, as in the case of the previous embodiment, the part that can be extracted is extracted, the part that can remove residual heat is removed, and the part remaining by these is treated with water. It can be easily removed from the molded product 6 by being removed and disappeared by a solvent such as or by heating.

As described above, since the pressure-resistant collapse core 1 retains its shape during molding, it contributes to the formation of the desired molded product 6 and is removed and eliminated after molding. It can be removed without leaving any residue.

Therefore, it is possible to prevent defects such as wear and damage of the product, improve the quality of the molded product, improve the yield, and further save time and cost. It becomes possible to improve the sex.

Fourth Step Further, as well shown in FIG. 3, the molded product 6 formed as described above is taken out from the molding die 4 and is subjected to pressure resistance collapse by a solvent such as water or heating as described above. Since the molding is completed when the child 1 is removed and disappears, unnecessary parts such as burrs of the molded product 6 are removed to form the molded product 6 as a desired final product.

The molded product 6 thus formed is a molded product in which the occurrence of defects is prevented and which is excellent in appearance quality and functional quality.

That is, the molded product 6 thus formed has a smooth inner surface with no rough surface, like the cast product 6 of the above-mentioned embodiment, and can improve the performance of the product. By reducing the weight and improving the productivity, it is possible to significantly reduce the cost, it is possible to prevent the occurrence of defects in the molded product, and it is possible to obtain a molded product having excellent dimensional accuracy and excellent quality.

The molding method using the pressure-resistant collapse core for molding according to the present invention includes a molding method such as injection molding adopted as a part of plastic molding and an injection molding adopted as a part of ceramic molding. Even when it is applied to various molding methods, it has an excellent effect as in the case of the pressure resistant collapse core for casting used in the casting, and the conventional problems can be solved.

Therefore, by casting using a metal core that is widely used as a conventional molding core, the size and shape of the molded product is not restricted as compared with the case where a molded product is obtained. All shapes and sizes can be molded, the man-hours can be significantly reduced, and a molded product with excellent quality can be efficiently obtained.

As described above, according to the molding method using the pressure-resistant collapse core for molding of the present invention, the pressure-resistant collapse core for molding retains its shape at the time of molding to achieve the desired purpose. In addition to contributing to the formation of a molded product, after molding, the molded product is melted and removed by residual heat or heating to be removed and no residue remains to facilitate removal of the molding pressure-resistant collapse core 1 from the molded product 6. The range of selection can be significantly expanded, core molding becomes easier, cost can be reduced, and defects such as wear and damage of products can be prevented, and the quality of molded products can be improved. The yield can be improved, time and cost can be saved, and productivity can be improved.

Also, when the molding method using the pressure-resistant collapse core for molding as one of the embodiments of the present invention is applied to plastic molding or ceramic molding, which is a molding method other than the casting method, Not limited to the injection molding of the embodiment, it is of course applicable to other molding methods,
Many modifications are conceivable, and the same effect as the above embodiment can be obtained.

The pressure-resistant collapse core 1 which is the molding core used in this example has non-disintegration properties such as pressure resistance and heat resistance at the time of molding for molding a molded product, and after molding. Has a disintegrating property such as disappearance (removability),
Moreover, it is required to have a condition that does not adversely affect a molded product such as generation of a large amount of gas at the time of molding, but as a core material having this condition, it is possible to disintegrate paper, grain or the like. There are the following materials.

That is, the pressure-resistant disintegrating core 1 has a pressure-resistant core made of a paper material such as waste paper, for example, after the paper material such as waste paper is dispersed with water as a medium. There is a pressure-resistant core formed by pressure-molding into a predetermined shape and further dehydrated and dried, or a pressure-resistant core made of grains such as rice, which includes, for example, Rice,
There are grains such as millet, acne, corn, etc., which are heated with water etc. to give viscosity and then formed into a predetermined shape,
There is a core with pressure resistance formed by further cooling,
Alternatively, a pressure-resistant core made of a material obtained by mixing a plurality of disintegratable materials, for example, a pressure-resistant core made of a paper material such as waste paper and grains such as rice, However, the invention is not limited to this, and any pressure-resistant collapse core made of a collapsible material and having pressure resistance may be used.

Each of these pressure-resistant collapse cores for molding is
The part that can be taken out is taken out, and the part that can remove residual heat is removed, and the remaining part can be almost completely removed by dissolution with a solvent such as water or combustion by heating.

Not only these pressure-resistant collapse cores,
Of course, if it is disintegratable by a solvent such as water or by heating, it can be applied to a pressure-resistant disintegrating core made of another material. In each of the pressure-resistant collapse cores 1, the extractable part is extracted, and the residual heat is removable from the residual heat, and the remaining part is dissolved or heated by a solvent such as water. Almost all of them can be removed and disappeared by burning due to.

Not only these pressure-resistant collapse cores,
Of course, if it is disintegratable by a solvent such as water or by heating, it can be applied to a pressure-resistant disintegrating core made of another material.

Next, the operation of the molded product molded using the pressure resistant collapse core for molding according to this embodiment will be described.

That is, according to the present invention, a molded article is formed by using a molding pressure-resistant collapse core as a core, and a molded article is molded using the molding pressure-resistant collapse core. The idea is to improve productivity and expand the scope of application, and to efficiently obtain molded products of excellent quality.Using collapsible materials such as waste paper, which is often discarded, as raw materials, By molding and using the pressure resistant collapse core for molding, it is possible to significantly reduce the material cost compared to the case of using a conventional sand core or resin core. In addition, for example, pressure resistance for molding used to form moldings such as castings, plastic moldings, and ceramic moldings. Molding using disintegrating core In the case of the molded article, there are effects below. (1) By using the pressure resistant collapse core for molding, conditions such as pressure resistance and heat resistance required for the core can be relaxed and the selection range of the core material can be expanded. (2) By using the pressure resistant collapse core for molding, the pressure resistance and heat resistance of the core can be adjusted by selecting the material and the amount thereof. (3) By using the pressure-resistant collapse core for molding as the core, molding of the core becomes easy, and molding equipment is simplified.
Moreover, the number of steps can be reduced, and the time and cost can be reduced. (4) Since the molding pressure-resistant collapse core is used as the core,
It will not break even if dropped or thrown, so it will be easy to handle,
Man-hours such as easy transportation and storage are reduced, and time and cost can be reduced. (5) Since the pressure-resistant disintegrating molding core to be used does not contain a permeating component such as a binder, the core component is prevented from permeating into the molded product, so that a defect such as a porosity may occur. It is prevented, defective products of molded products are prevented from occurring, yield is improved,
Productivity can be improved. (6) By using the pressure-resistant collapse core for molding as the core, it becomes easy to form the hollow portion and the undercut portion, and the core strength is improved. The shape and the whole size can be molded, and the application range can be expanded. (7) By using a core that has the reciprocal conditions of pressure resistance during molding and disintegration after molding, it is possible to avoid problems such as molten metal insertion during molding and to improve pressure resistance (non-disintegration). Maintaining and facilitating core disintegration after molding and complete removal of core components, prevent adhesion to molded products, and prevent molded product defects such as abrasion and damage of molded products be able to. (8) The pressure-resistant disintegrating core for molding does not contain components that are difficult to remove, such as a binder, and has disintegrating properties after molding, so that the core can be completely removed easily and no pollution occurs. In addition to being able to prevent it, the number of steps can be reduced, and the time and cost can be reduced. (9) The pressure-resistant collapse core for molding can be withdrawn from the molded product after molding a part or most of it depending on the shape, and thus the extracted core can be reused without discarding. Not only is it possible to prevent pollution, but it is also possible to reduce material costs due to reuse.

Further, in the present invention, the pressure-resistant collapse core for molding is removed by removing the part that can be removed and removing the remaining heat by removing the remaining heat. It can be removed and eliminated by a solvent such as water or by heating, and the molding pressure-resistant collapse core can be easily removed regardless of the type and shape of the cast product.

Further, since the pressure-resistant collapse core is made of a disintegratable material, it is possible to dissolve and remove the pressure-resistant collapse core in combination with residual heat or heating or alone with a solvent such as water.

For example, when the pressure-resistant collapse core for molding is a pressure-resistant collapse core made of a disintegratable material, the solvent is, for example, water, with residual heat or heating, or alone. It can be melted and removed, and the pressure-resistant collapse core for molding can be easily discharged and removed.

Even when a molded product is obtained by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding, the molding pressure resistance of the present invention is obtained. By applying a molded product molded using a disintegrating core, the pressure-resistant disintegrating core for molding can be easily discharged and removed, and the same effect as in the case of the above casting can be exhibited. In addition, it is possible to contribute to the efficient production of a desired molded product having excellent quality.

Furthermore, even when a molded product is obtained by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding, the molding pressure resistance of the present invention is obtained. By using a molded product molded using the disintegrating core, it is possible to efficiently obtain a desired molded product having excellent quality.

The productivity can be improved and the range of application can be increased. By using the pressure resistant collapse core for molding, molding of the core can be facilitated and molding equipment can be simplified.
In addition, the number of processes is reduced, time and cost can be reduced, handling is easy, transportation and storage are easy, and pressure adjustment during molding is not required. There are various advantages such as reduction of

Next, FIG. 5 shows a third embodiment of a molded article molded by using the pressure-resistant collapse core for molding of the present invention. The pressure-resistant collapse core 1 which is a pressure-resistant collapse core for molding is shown in FIG. Has a filling space S formed therein, and the filling space S is filled with a heat-resistant powdery, granular, or lumpy filling material F.

That is, the pressure-resistant collapse core 1, which is the pressure-resistant collapse core for molding of the present invention, is filled with the heat-resistant packing material F in the form of powder, particles, or lumps.

First, although not shown in the drawings, a core body H having one end opened and a filling space S formed in a hollow shape is molded using a collapsible material such as waste paper or grain, The filling space S is filled with a heat-resistant powdery, granular, or lumpy filling material F, and the opening is closed, as shown in FIG.
As well shown in FIG. 1, a pressure resistant collapse core 1 having pressure resistance in which the filling space S is filled with the filling material F is formed.

Then, by molding using the mold 4 using the pressure-resistant collapse core 1 which is the pressure-resistant collapse core for molding in which the filling substance F is filled, a cast product, a plastic molded product, The molded product 6 such as a ceramic molded product is molded.

For this reason, the pressure-resistant collapse core 1 used in the present invention, when filled with the filling substance F inside as described above, has no pressure resistance or heat resistance when molding the molded product. In addition to having disintegration property, it has disintegration property such as extinction property (removability) after molding, and has a condition that does not give adverse effects to the molded product such as generation of a large amount of gas at the time of molding. Therefore, it is required to be able to contribute to efficiently obtain a molded product having excellent quality.

Then, the filling material F is
Unrestricted state (free state) after the core body H is removed and disappeared
Therefore, it is required that the molded product 6 can be easily discharged and removed. Examples of materials that satisfy this condition include powder, granules, and lumps, which can be easily removed without leaving a residue, and the quality of the molded product 6 can be improved.

Further, the filling material F is required to have a condition that does not give a bad influence to the molded product such as generation of a large amount of gas during the molding.

Further, the filling substance F is required to have heat resistance at the time of molding, and as the material satisfying the above conditions, molding sand or resin sand or calcium carbonate (mold sand containing resin mixed with resin) is used. (White ink), silica stone, metal, ceramic and others.

By using the pressure-resistant collapse core 1 for molding, a molded product such as a cast product, a plastic molded product or a ceramic molded product can be formed.

For example, when a pressure-resistant collapse core 1 which is the pressure-resistant collapse core for molding is used to mold a molded product such as a cast product, a plastic molded product, or a ceramic molded product, it is often possible to obtain the result shown in FIG. As shown, the pressure-resistant collapse core 1 can be disposed between the upper mold 2 and the lower mold 3 to form the mold 4 having the cavity 5.

Next, as shown in FIGS. 1 and 2, in the cavity 5 formed in the mold 4, in the case of aluminum die casting, molten metal such as aluminum molten metal is used depending on the material of the cast product. A molded product 6 such as a cast product is molded by pouring molten metal while applying pressure.

At this time, since the pressure-resistant collapse core 1 has a large heat capacity, it has a high heat resistance to the molten metal, and also has a high pressure resistance, so that even if the high-pressure molten metal is poured during molding, The initial shape can be retained without deformation or pressure deformation.

Further, the temperature of the molten metal is considerably lower than the initial temperature (for example, about 660 ° C. in the case of aluminum molten metal) by the time it reaches the cavity 5 of the mold 4, Due to its own temperature and heat capacity, the pressure-resistant disintegrating core 1 can retain its initial shape without being immediately melted due to the reflecting action and the temperature action even if the molten metal acts.

Therefore, a molded product 6 such as a cast product having a shape corresponding to the shape of the hollow portion 5 is formed in a state where the original shape is maintained without deforming the pressure resistant collapse core 1.

Subsequently, as well shown in FIGS. 2 and 3, the molded product 6 such as the cast product formed as described above is taken out from the molding die 4, thereby completing the molding.

Further, the finished product can be obtained by removing unnecessary portions such as burrs of the molded product 6.

At this time, as well shown in FIGS. 1 and 2, by using the pressure-resistant collapse core 1 in which the filling space S is filled with the filling substance F, molding such as pouring of molten metal is performed. The pressure resistance at the time can be maintained, the deformation can be prevented and the original shape can be maintained, and the heat resistance at the time of the molding can be improved to contribute to the molding.

Also in this embodiment, the formed molded product 6 is formed.
In the same manner as the molded product 6 of the above-mentioned embodiment, the smooth inner surface having no rough surface can improve the performance of the product, and can significantly reduce the cost by reducing the weight and improving the productivity. In addition to this, it is possible to prevent the occurrence of defects in the molded product, and it is possible to obtain a molded product having excellent dimensional accuracy and excellent quality.

Next, FIG. 6 shows a fourth embodiment of a molded article molded using the pressure-resistant collapse core for molding of the present invention, which is used in a molding method using the pressure-resistant collapse core for molding. The pressure-resistant collapse core 1 which is a molding core has a filling space S inside a core body H having a pressure resistance formed of a collapsible material.
And the filling space S is filled with a heat-resistant powdery, granular, or lumpy filling material F, and a protective layer 7 is formed on the surface (outer surface) thereof.

The core body H fulfills the contradictory conditions of non-disintegration such as pressure resistance and heat resistance during molding and disintegration such as disappearance after molding, and generates a large amount of gas during molding. It is required to satisfy the conditions that do not adversely affect the molded product.

The protective layer 7 is required to satisfy the reciprocal conditions of non-disintegration such as heat resistance during molding and disintegration such as heat dissipation after molding. It is integrally formed with a predetermined thickness on the surface of H.

The protective layer 7 is, for example, a heat resistant protective layer made of a heat resistant resin or the like.

As the material for forming the heat resistant protective layer 7, heat resistant rubber such as silicon rubber and fluorine rubber, heat resistant synthetic resin resin such as silicon resin and fluorine resin, low melting point metal, old ceramics and new resin. There are ceramics such as ceramics (fine ceramics) and other heat resistant materials.

That is, as the synthetic resin (plastic) as a material for forming the heat-resistant protective layer 7, a thermoplastic synthetic resin (thermoplastic) is most suitable and satisfies all the above conditions. It is possible to obtain a cast product or other molded product that sufficiently satisfies the intended purpose.

The most suitable one of the thermoplastic synthetic resins (thermoplastics) is a polycarbonate synthetic resin (polycarbonate plastic), which has both of the above conditions, and has the intended purpose. It is possible to obtain a sufficiently satisfactory cast product or other molded product.

Further, next to this, a fluorine resin (polyfluorethylene resin) such as tetrafluoroethylene resin, a polyimide resin (polyimide plastic), a polyamideimide resin (polyamideimide plastic)
There is a polysulfone resin (polysulfone plastic), which has all of the above conditions, and a cast product or other molded product satisfying the intended purpose can be obtained.

Next to this, there are polyamide resin (nylon resin) and polypropylene resin (polypropylene plastic), which meet all of the above conditions and obtain a cast product which satisfies the initial purpose. You can

Further, as other materials, polyethylene resin (polyethylene plastic) and polyester resin (tetron resin) can be mentioned, which have all of the above conditions, and a cast product satisfying the initial purpose is obtained. be able to.

Further, the protective layer 7 formed on the surface (outer surface) of the pressure-resistant collapse core 1 used in the molding core of this embodiment is not limited to the above synthetic resin, but the molded product 6 is molded. In addition to having non-disintegration such as heat resistance during molding,
After molding, it has a disintegration property such as heat dissipation (removability) that is removed and lost by residual heat or heating of the molded product, and does not give adverse effects to the cast product such as generating a large amount of gas during casting. If so, it goes without saying that a synthetic resin other than the above-mentioned examples can also be used, and the same effects as the above-mentioned examples can be obtained.

In the pressure-resistant collapse core 1 of the present invention, the filling space S is formed inside the above embodiment, and the filling space S is formed.
Is not limited to one having a heat-resistant powdery, granular, or lumpy filling material F and a protective layer 7 formed on the surface (outer surface) thereof. It goes without saying that the protective layer 7 may be formed on the surface (outer surface) of the solid core body H without the filling substance F. According to such a pressure-resistant collapse core 1 for molding, it is possible to further improve the pressure resistance (non-disintegration) during molding without impairing the disintegration property such as heat dissipation property (removability) after molding. In addition, since it is provided with the condition that the molded product is not adversely affected such that a large amount of gas is generated at the time of molding, it is possible to efficiently contribute to a molded product having excellent quality.

Then, using the pressure-resistant collapse core 1 having the protective layer 7 formed on the surface (outer surface) in this manner, in the same manner as in the above-mentioned embodiment, a cast product, a plastic molded product, or a ceramic molded product is obtained. A molded product such as a product can be formed.

In this case, the pressure-resistant collapse core 1 having the protective layer 7 formed on the surface (outer surface) is arranged between the upper mold 2 and the lower mold 3, and the molding die having the cavity 5 is formed. After forming 4,
By injecting a molding material into the cavity 5 formed inside the molding die 4 in the same manner as in the above-described embodiment, the desired molded product 6 can be molded.

Also in this embodiment, the formed molded product 6 is formed.
In the same manner as the molded product 6 of the above-mentioned embodiment, the smooth inner surface having no rough surface can improve the performance of the product, and can significantly reduce the cost by reducing the weight and improving the productivity. In addition to this, it is possible to prevent the occurrence of defects in the molded product, and it is possible to obtain a molded product having excellent dimensional accuracy and excellent quality.

Next, FIG. 7 shows a fifth embodiment of a molded article molded using the pressure resistant collapse core for molding of the present invention, which is used in a molding method using the pressure resistant collapse core for molding. A pressure-resistant collapse core 1 as a pressure-resistant collapse core for molding, which is a pressure-resistant collapse core for molding, has a filling space S formed therein, and the filling space S has a powdery or heat-resistant shape. Filled with a filling material F in the form of granules or lumps, and its surface (outer surface)
Further, the coating layer 8 is formed on the surface (outer surface) thereof.

The coating layer 8 protects the core without melting due to high heat during molding and residual heat after molding.

The pressure-resistant collapsible molding core 1 used in this example is composed of a core body H having pressure resistance formed of a collapsible material, a molten metal during casting, and residual heat after casting. And a coating layer 8 having a predetermined thickness integrally formed on the surface of the core body so as to protect the core body while maintaining the original shape without melting.

Further, the core body H has the conflicting conditions of non-disintegration such as pressure resistance and heat resistance during molding and disintegration such as extinction after molding, and at the same time a large amount of gas is formed at the time of molding. It is required to satisfy the condition that the molded product is not adversely affected such as generation.

Further, the coating layer 8 protects the core body by maintaining its original shape without melting due to high heat during molding and residual heat after molding, and is a heat resistant coating made of, for example, a heat resistant resin. There are layers.

Further, as a material for forming the heat resistant coating layer 8, there is silicon having excellent heat resistance such as silicon resin or silicon rubber, and the original shape thereof is not melted by high heat during molding and residual heat after molding. It can be held to protect the core body H.

In the pressure-resistant collapse core 1 of the present invention, the filling space S is formed inside the above embodiment, and the filling space S is formed.
Is not limited to the one in which the heat-resistant powdery, granular, or lumpy filler material F is filled, and the coating layer 8 is formed on the surface (outer surface) thereof. It goes without saying that the coating layer 8 can be formed on the surface (outer surface) of the solid core body H without the filling substance F. According to such a pressure-resistant collapse core 1 for molding, the pressure resistance (non-collapsibility) during molding can be further enhanced without impairing the disintegration property such as disappearance (removability) of the core body H after molding. Can be improved,
Moreover, it is possible to further improve the conditions that do not adversely affect the molded product, such as generating a large amount of gas during molding, to make it perfect, which can contribute to efficiently obtaining a molded product with excellent quality. .

Then, using the pressure-resistant collapse core 1 having the coating layer 8 formed on the surface (outer surface) thereof, a cast product, a plastic molded product, or a ceramic molded product is manufactured in the same manner as in the above embodiment. And the like can be formed.

In this case, the pressure-resistant collapse core 1 as a molding core having the coating layer 8 formed on the surface (outer surface) thereof is disposed between the upper mold 2 and the lower mold 3 to form a cavity. After forming the molding die 4 having the molding die 5, the target molding 6 can be molded by injecting the molding material into the cavity 5 formed inside the molding die 4 in the same manner as in the above-described embodiment. You can do it.

Then, the core body H is removed by a solvent such as water or residual heat or heating after a predetermined time has elapsed after the molding material was injected into the cavity 5 and molded.

However, the heat-resistant coating layer 8 is very excellent in heat resistance, and retains its original shape without being melted by the residual heat or the heating of the molded product 6 not only during molding but also after molding. Therefore, the core body H is wrapped in a sealed state to protect it, and the core body H is melted and removed by residual heat or heating of the molded product 6, so that the core body H contains an organic synthetic resin. Even if the core body H generates gas due to, for example, it is possible to completely prevent the generation of gas from the pressure-resistant collapse core 1 for molding, and prevent the components of the core body H from penetrating into the molded product 6. It is possible to prevent the adverse effect on the molded product, prevent the defective molded product 6 from occurring, prevent the defective product of the molded product 6, and contribute to the formation of the desired molded product 6. You can

Since the heat-resistant coating layer 8 is melted and removed by the internal core body H due to residual heat or heating of the molded product 6, the content of the molded product 6 is in the form of an empty bag (balloon state). It can be easily taken out from inside.

Also in this embodiment, the formed molded product 6 is formed.
In the same manner as the molded product 6 of the above-mentioned embodiment, the smooth inner surface having no rough surface can improve the performance of the product, and can significantly reduce the cost by reducing the weight and improving the productivity. In addition to this, it is possible to prevent the occurrence of defects in the molded product, and it is possible to obtain a molded product having excellent dimensional accuracy and excellent quality.

The present embodiment has the following actions.

(1) The heat-resistant coating layer that protects the core body so as to wrap it inside prevents the components of the core body from penetrating into the molded product, thereby preventing adverse effects on the molded product. However, it is possible to prevent the occurrence of defects in the molded product and prevent the generation of defective molded products, thereby improving the yield and improving the productivity. (2) Since the heat-resistant coating layer of a predetermined thickness made of a synthetic resin such as silicon having excellent heat resistance is integrally formed on the surface of the core body, the core body can be protected so as to be wrapped inside. The shape-retaining function of the pressure-resistant collapse core for molding during injection of the molding material has been improved, and the initial shape can be retained more reliably without melting in the molding material, resulting in excellent dimensional accuracy and quality of the molded product. It can be better. (3) In particular, since synthetic resins such as silicon are excellent in flexibility and elasticity, they can form a uniform wall thickness from thin to thick ones, and from small to large ones regardless of size. A heat-resistant coating layer can be formed on the surface of the child body with a predetermined thickness, and even complicated shapes can be easily integrally formed, the molding work is simplified, and the finished product can be easily obtained.
Furthermore, the quality of the molded product can be further improved. (4) In particular, since silicon has excellent heat resistance and releasability, it does not adhere to molded products, and it does not melt not only during molding but also after heat and heating after casting. Since the core body is protected by holding the core, the molding is easy and the core can be easily removed after molding, and a finished product having excellent quality can be easily obtained. (5) Especially, since the main element of silicon is inorganic silicon (Si), no gas is generated at the time of molding, and even if the core body contains an organic synthetic resin, it is not necessary at the time of molding. It retains its original shape without melting even with residual heat or heat after molding and protects the core body by wrapping it in a sealed state inside, so that gas generation from the pressure-resistant collapse core for molding can be completely prevented, and the molded product Can be prevented and the quality of the finished product can be improved. (6) In particular, since silicon is excellent in flexibility, elasticity, and releasability and has high strength, it can be used as a non-disintegrating core not only for direct punching but also for deformation punching. It becomes easy to pull out the pressure-resistant collapse core, and the molded product can be easily molded.

Incidentally, the pressure-resistant collapse core for molding of the present invention is not limited to the above-mentioned embodiments, and many modifications can be considered.

The molded articles molded using the pressure-resistant collapse core for molding of the present invention are not limited to the materials and shapes of the above-mentioned examples, but various shapes using various materials. The present invention is not limited to the above-mentioned embodiment, and many modifications can be considered.

For example, although the pressure-resistant collapse core for molding of the above-mentioned embodiment has a solid shape in view of non-disintegration at the time of molding, it is not limited to this, and weight reduction, cost reduction, Also, from the viewpoint of ease of disintegration / removal after molding, it is needless to say that a hollow shape can be used.

The molded article molded using the pressure-resistant collapse core for molding of the present invention is suitable for various molding methods such as plastic molding and ceramic molding, which are molding methods other than the above-mentioned casting. Also, the present invention is not limited to the materials and shapes of the above-mentioned examples, but can be applied to various shapes using composite materials and other materials other than the above-mentioned examples to improve the quality of molded products. Can be done.

Furthermore, the material of the pressure-resistant collapse core for molding used in the molded article molded using the pressure-resistant collapse core of the present invention is limited to the pressure-resistant collapse core shown in the above-mentioned Examples. When the molded product is molded, it has non-disintegration properties such as pressure resistance and heat resistance, and disintegration property such as heat loss (removability) that is removed and removed by residual heat or heating of the molded product after molding. Any collapsible material may be used, and it can be a single material or a mixed material of a plurality of materials, or a composite material, and a pressure resistant collapse core for molding using various materials is conceivable. The same effect as can be obtained.

The molded article molded using the pressure-resistant collapse core for molding of the present invention is not limited to the above-mentioned examples, and many modifications are conceivable.

Further, as the material of the pressure-resistant collapse core for molding used for molding a molded article molded using the pressure-resistant collapse core for molding of the present invention, the collapsible materials shown in the above-mentioned examples are used. Without being limited, it has non-disintegration properties such as pressure resistance and heat resistance when molding a molded product, and disintegrates heat loss property (removability) etc. that is removed and lost by residual heat or heating of the molded product after molding. As long as it is a disintegrating material, it can be a single material or a mixture of multiple materials, or a composite material, and molding using various materials such as calcium carbonate (white ink), calcium chloride, silica stone, etc. A pressure-resistant collapse core for use is conceivable, and the same effect as that of the above-mentioned embodiment can be obtained.

[0203]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the molded product is formed by using the molding pressure-resistant collapse core as the molding core, thereby improving the productivity and expanding the range of application and the quality. The idea is to obtain a molded product that is excellent in terms of quality, and using a collapsible material such as waste paper, which is usually discarded, as the raw material to mold and use the pressure-resistant collapse core for molding. By doing so, there is a great effect that the material cost can be significantly reduced compared to the case of using a conventional sand core or resin core. Molding using a pressure resistant collapse core for molding, which is used to form molded products such as ceramics and ceramics. In the case of molded products, UNA there is an excellent effect. (1) By using the pressure resistant collapse core for molding, there is an advantage that conditions such as pressure resistance and heat resistance required for the core can be relaxed and the selection range of the core material can be expanded. (2) By using the pressure resistant collapse core for molding, there is an advantage that the pressure resistance and heat resistance of the core can be adjusted by selecting the material and the amount thereof. (3) By using the pressure-resistant collapse core for molding as the core, molding of the core becomes easy, and molding equipment is simplified.
Moreover, there is an advantage that the number of steps is reduced and time and cost can be reduced. (4) Since the molding pressure-resistant collapse core is used as the core,
It will not break even if dropped or thrown, so it will be easy to handle,
There is an advantage that man-hours such as easy transportation and storage are reduced, and time and cost can be reduced. (5) Since the pressure-resistant disintegrating molding core to be used does not contain a permeating component such as a binder, the core component is prevented from permeating into the molded product, so that a defect such as a porosity may occur It is prevented, defective products of molded products are prevented from occurring, yield is improved,
There is an advantage that productivity can be improved. (6) By using the pressure-resistant collapse core for molding as the core, it becomes easy to form the hollow portion and the undercut portion, and the core strength is improved. There is an advantage that the shape and the whole size can be formed and the applicable range can be expanded. (7) By using a core that has both the pressure resistance during molding and the disintegration property after molding, the occurrence of problems such as molten metal insertion during molding can be avoided and pressure resistance (non-disintegration) can be achieved. Maintaining and facilitating core disintegration after molding and complete removal of core components, prevent adhesion to molded products, and prevent molded product defects such as abrasion and damage of molded products There is an advantage that can be. (8) The pressure-resistant disintegrating core for molding does not contain components that are difficult to remove, such as a binder, and has disintegrating properties after molding, so that the core can be completely removed easily and no pollution occurs. In addition to being able to prevent it, there is an advantage that the number of steps is reduced and the time and cost can be reduced. (9) The pressure-resistant collapse core for molding can be withdrawn from the molded product after molding a part or most of it depending on the shape, and thus the extracted core can be reused without discarding. In addition to the prevention of pollution, the material cost can be reduced by reuse.

Furthermore, the pressure-resistant collapse core for molding used in a molded article molded using the pressure-resistant collapse core for molding of the present invention has high heat during molding and residual heat after molding on the surface (outer surface). In the case of forming the coating layer that protects the core body by maintaining the original shape without melting by heating, the following excellent effects are obtained.

(10) The coating layer protecting the core body so as to wrap it inside prevents the components of the core body from penetrating into the molded article, thereby preventing adverse effects on the molded article. There are advantages that it is possible to prevent the occurrence of defects in the molded product, prevent the defective product from being generated, and improve yield and productivity. (11) In particular, since a coating layer of a predetermined thickness made of synthetic resin such as silicon having excellent heat resistance is integrally formed on the surface of the core body, the core body can be protected so as to be wrapped inside, and molding The shape retention function of the pressure-resistant collapse core for molding at the time of molding is improved, and the initial shape is more reliably retained without melting during molding, resulting in superior dimensional accuracy and better quality of molded products. There is an advantage that can be. (12) In particular, since synthetic resin such as silicon is excellent in flexibility and elasticity, it is possible to form a uniform thickness from thin to thick ones, and medium to large and small ones A coating layer can be formed on the surface of the child body with a predetermined thickness, and even complicated shapes can be easily formed integrally, molding work is easy, and finished products can be obtained easily, and the quality of molded products is even better. There is an advantage that can be done. (13) In particular, since silicon has excellent heat resistance and releasability, it does not adhere to the molded product and melts not only in the molten metal during molding but also in the residual heat and heat after molding. Since the original shape is retained and the core body is protected, molding has a merit that the core can be easily removed after molding, and a finished product with excellent quality can be easily obtained. (14) In particular, the main element of silicon is inorganic silicon (Si).
Therefore, of course, there is no gas generation at the time of molding, even if the core body contains an organic synthetic resin, it retains its original shape without being melted by residual heat or heating after molding as well as during molding. Since the core body is wrapped in a sealed state for protection, gas generation from the core can be completely prevented, adverse effects on the molded product can be prevented, and the quality of the finished product can be improved. (15) In particular, since silicon is excellent in flexibility, elasticity, and releasability, and also has high strength, it can be used as a non-disintegrating core not only for direct punching but also for deformation punching. It is easy to pull out the pressure resistant collapse core for use, and there is an advantage that molding of a molded product can be facilitated.

Further, according to the present invention, the molding pressure-resistant collapse core used for the molded article molded by using the molding pressure-resistant collapse core is removed by removing the part that can be extracted and by removing the residual heat. Remaining heat can be removed from the removable parts, and almost all of the remaining parts can be removed and dissolved by dissolving with a solvent such as water or burning by heating, so it is easy regardless of the type and shape of the cast product. There is an excellent effect that the pressure resistant collapse core for molding can be removed.

Even when a molded article is obtained by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding, the molding pressure resistance of the present invention is obtained. By applying the method for removing the disintegrating core, the pressure-resistant disintegrating core for molding can be easily discharged and removed, and the same effect as the above casting can be exerted, so that the quality is excellent. There is an excellent effect that it can contribute to the efficient production of a desired molded product.

Furthermore, even when a molded product is obtained by a molding method such as injection molding adopted as a part of plastic molding or a molding method such as injection molding adopted as a part of ceramic molding, the molding pressure resistance of the present invention is obtained. The use of the molded product molded using the sex-disintegrating core has an advantage that a desired molded product excellent in quality can be efficiently obtained.

[0209] The productivity can be improved and the range of application can be increased. By using the pressure resistant collapse core for molding, molding of the core is facilitated and molding equipment is simplified.
In addition, the number of processes is reduced, time and cost can be reduced, handling is easy, transportation and storage are easy, and pressure adjustment during molding is not required. There are various excellent advantages such as reduction of

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a method for forming a molding die using a pressure resistant collapse core of a molded article molded using a pressure resistant collapse core for molding according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a method for molding a molded product by injecting a molding material among molded products molded using the pressure-resistant collapse core for molding according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a molded product taken out from a molding die among molded products molded using the pressure resistant collapse core for molding according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a first embodiment of a molding collapse core used for molding a molded article molded using the molding pressure-resistant collapse core of the present invention.

FIG. 5 is a cross-sectional view showing a third embodiment of a molding pressure-resistant collapse core used for molding a molded article molded using the molding pressure-resistant collapse core.

FIG. 6 is a cross-sectional view showing a fourth embodiment of a molding pressure-resistant collapse core used for molding a molded article molded using the molding pressure-resistant collapse core.

FIG. 7 is a cross-sectional view showing a fifth embodiment of a molding pressure-resistant collapse core used for molding a molded article molded using the molding pressure-resistant collapse core.

[Explanation of symbols]

1 Molding pressure-resistant collapse core (pressure-resistant collapse core) 2 Upper mold 3 Lower mold 4 Mold (mold) (plastic mold) (ceramic mold) 5 Cavity 6 Molded product (casting) (plastic molding) Product) (Ceramic molded product) 7 Protective layer (heat resistant protective layer) 8 Covering layer (heat resistant coating layer) H Core body S Filling space F Filling substance

[Procedure amendment]

[Submission date] October 24, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0139

[Correction method] Change

[Correction content]

Not only these pressure-resistant collapse cores,
Of course, as long as it is disintegratable by a solvent such as water or by heating or cooling , it can be applied to a pressure-resistant disintegrating core made of another material.

Claims (34)

[Claims] 1. A molding die such as a mold, a plastic molding die, or a ceramic molding die is formed by using a pressure-resistant core made of a collapsible material such as paper, fiber or grain as the core. Formed by molding a molded product such as a cast product, a plastic molded product, or a ceramic molded product using the mold, and a molded product molded using a pressure-resistant collapse core for molding. . 2. A molding core having a pressure resistance made of a disintegratable material has both conditions of non-disintegration such as pressure resistance during molding and disintegration such as disappearance after molding. A molded article formed using the pressure-resistant collapse core for molding according to claim 1, which is a child and is formed by molding using the core. 3. A molding core made of a collapsible material and having pressure resistance is a core made of a paper material such as waste paper, and is formed by molding using the core. A molded article molded using the pressure-resistant collapse core for molding according to claim 1 or 2. 4. A core made of a paper material such as used paper is formed by dispersing the paper material such as used paper through water or the like, press-molding it into a predetermined shape, and then dehydrating and drying it. A core, formed by molding using the core,
A molded product molded using the pressure-resistant collapse core for molding according to claim 3. 5. A pressure-resistant molding core made of a collapsible material is a core made of grains such as rice, millet, acne, corn, etc., and is molded by using the core. It is formed, Claim 1 or Claim 2 characterized by the above-mentioned.
A molded article molded using the pressure-resistant collapse core for molding described. 6. A core made of grains such as rice is produced by heating grains such as rice, millet, acne and corn together with water to impart viscosity, and then press-molding to form into a predetermined shape. A molded product formed by using a pressure-resistant collapse core for molding according to claim 5, which is a core formed by cooling and formed by molding using the core. 7. A pressure-resistant molding core made of a collapsible material is a core made of a mixture of a plurality of collapsible materials, and is molded by using the core. It is formed, Claim 1 or Claim 2 characterized by the above-mentioned.
A molded article molded using the pressure-resistant collapse core for molding described. 8. A core made of a material in which a plurality of disintegratable materials are mixed is a core made of a paper material such as waste paper and a grain such as rice. By molding the core, A molded article molded using the pressure-resistant collapse core for molding according to claim 7, which is formed. 9. A pressure-resistant molding core made of a collapsible material has a filling space formed therein, and the filling space is filled with heat-resistant powder, granules, lumps, or the like. A core filled with a substance, which is formed by molding using the core, wherein the pressure-resistant collapse for molding according to any one of claims 1 to 8. A molded product molded using a child. 10. A core made of foundry sand as a filling material,
The molded article molded using the pressure-resistant collapse core for molding according to claim 9, which is formed by molding using the core. 11. The molding according to claim 9, wherein the filling substance is a core made of a resin sand in which a molding sand is mixed with a resin, and the core is formed by molding using the core. A molded product molded using a pressure-resistant collapse core. 12. The molding pressure-resistant collapse according to claim 9, wherein the filling substance is a core made of calcium carbonate (white ink), and the core is formed by molding using the core. A molded product molded using a core. 13. The pressure-resistant collapse core for molding according to claim 9, wherein the filling material is a core made of silica stone, and the core is formed by molding using the core. Molded product 14. The pressure-resistant collapse core for molding according to claim 9, wherein the filling material is a core made of a metal, and the core is formed by molding using the core. Molded product 15. The filling material is a core made of a ceramic such as old ceramics or new ceramics (fine ceramics), and is formed by molding using the core. A molded article molded using the pressure-resistant collapse core for molding described. 16. A molding core made of a collapsible material and having pressure resistance is a core having a protective layer formed on its surface, and is formed by molding using the core. A molded article molded using the pressure-resistant collapse core for molding according to any one of claims 1 to 15. 17. A core comprising a protective layer which has both conditions of non-disintegration such as heat resistance during molding and disintegration such as heat dissipation after molding. The core is used. 17. A molded article molded using the pressure-resistant collapse core for molding according to claim 16, which is formed by molding. 18. A core, wherein the protective layer is a heat-resistant protective layer, and formed by molding using the core.
A molded article molded using the pressure-resistant collapse core for molding according to claim 16 or 17. 19. The pressure-resistant collapse for molding according to claim 18, wherein the heat-resistant protective layer is a core made of heat-resistant rubber, and is formed by molding using the core. A molded product molded using a core. 20. The pressure-resistant collapse for molding according to claim 18, wherein the heat-resistant protective layer is a core made of a low melting point metal, and is formed by molding using the core. A molded product molded using a core. 21. A heat-resistant protective layer is a core made of a ceramic such as old ceramic or new ceramic (fine ceramic), and is formed by molding using the core. Item 18. A molded product molded using the pressure-resistant collapse core for molding according to item 18. 22. The heat resistant protective layer is a core made of a thermoplastic synthetic resin (thermoplastic), and is formed by molding using the core. A molded product molded using the pressure-resistant collapse core for molding. 23. A thermoplastic synthetic resin (thermoplastic) is a core made of a heat resistant synthetic resin (heat resistant plastic), and is formed by molding using the core. A molded article molded using the pressure resistant collapse core for molding according to claim 22. 24. A heat-resistant synthetic resin is a core which is a polycarbonate synthetic resin (polycarbonate plastic), and is formed by molding using the core.
A molded product molded using the pressure-resistant collapse core for molding according to claim 23. 25. A heat-resistant synthetic resin is a core which is a fluororesin (polyfluoroethylene resin) such as tetrafluoroethylene resin, and is formed by molding using the core. A molded product molded using the pressure-resistant collapse core for molding according to claim 23. 26. The molding according to claim 23, wherein the heat-resistant synthetic resin is a core which is a polyimide resin (polyimide plastic), and is formed by molding using the core. A molded product molded using a pressure-resistant collapse core. 27. The heat-resistant synthetic resin is a core which is a polyamide-imide resin (polyamide-imide plastic), and is formed by molding using the core.
A molded product molded using the pressure-resistant collapse core for molding according to claim 23. 28. The molding according to claim 23, wherein the heat-resistant synthetic resin is a core which is a polysulfone resin (polysulfone plastic), and is formed by molding using the core. A molded product molded using a pressure-resistant collapse core. 29. The heat-resistant synthetic resin is a core which is a polyamide resin (nylon resin), and is formed by molding using the core.
A molded article molded using the pressure-resistant collapse core for molding described. 30. A pressure-resistant molding core made of a collapsible material is a core having a coating layer formed on the surface thereof, and is formed by molding using the core. A molded article molded using the pressure-resistant collapse core for molding according to any one of claims 1 to 15. 31. A core comprising a core which protects a core without being melted by high heat during molding and residual heat after molding, and is formed by molding using the core.
31. A molded product molded using the pressure-resistant collapse core for molding according to claim 30. 32. A core having a coating layer made of silicon,
32. A molded article molded using the pressure-resistant collapse core for molding according to claim 30 or 31, which is formed by molding using the core. 33. A core made of silicon resin, wherein the core is formed by molding the core.
33. A molded product molded using the pressure-resistant collapse core for molding according to claim 32. 34. A core made of silicone rubber, wherein the core is formed by molding the core.
33. A molded product molded using the pressure-resistant collapse core for molding according to claim 32.