JP5925102B2 - Casting press molding apparatus, casting press molding method and metal molded product - Google Patents

Description

  The present invention relates to a casting press molding apparatus, a casting press molding method, and a metal molded product that press-press a molten metal stored in a mold to suppress the occurrence of internal defects and maintain the dimensional accuracy of a manufactured product. About.

  Among metal products, metal products made of low-melting-point metal materials, such as tin products, are generally cast using mold casting or porous stone, centrifugal casting using rubber molds, etc. Yes. Since these casting methods cast products directly from the mold, they are very economical in the case of a low melting point metal such as tin or a low melting point alloy.

  The low melting point metal or low melting point alloy is a metal or alloy characterized by a low melting point, and is an alloy mainly composed of zinc, indium, gallium, tin, bismuth, lead or the like. There are solder, tin metal alloy, wood metal, rose alloy and galinstan. In particular, solder is stable in the air, and is widely used for joints that do not require strength, such as electronic parts and daily necessities, temperature sensitive materials such as thermal fuses and fire-extinguishing sprinkler heads, and fillers when bending pipes. ing.

  Tin or tin (Sn atomic number 50 atomic weight 118.70) used as this low melting point metal or low melting point alloy is reduced by mixing and melting tin, carbon, silica, fluorite or limestone in a furnace. Crude tin is made and refined by dry method or electrolytic method. The purity of the metal is about 99.9% to 99.5% as shown in the JIS standard, and the main impurities are Pb, Sb, As, Cu, Fe and the like. (See JIS H2108).

As a metal product using such tin, Patent Document 1 discloses a metal container that can be easily and finely changed with a finger or a hand, and does not elute metal components that are harmful to hygiene. A metal container with an effect and excellent design was proposed. This Patent Document 1 proposes a manufacturing method for die casting using a metal material having a content of Sn 98.0 wt% or more as a manufacturing method thereof.
JP 2006-16681 A

  The production method for green casting shown in Patent Document 1 has the following problems. In other words, even if the green mold itself can be made easily, it is necessary to consider the pouring gate and runner, and there are many hot points, hot water amount, pouring speed, and other points to be careful of, and a manufacturing space is required for mass production of large lots. . In addition, casting sand used for green molds is susceptible to caking, drag, fluidity, and moisture, and it is not easy to prevent problems such as sinkholes, pinholes, and rough skin, and the quality is not stable. The hot water method is generally the gravity type, and the hot water flows from top to bottom due to gravity and solidifies naturally after casting, but the hot water temperature is low (above the melting point) and the molten metal is highly viscous to fine parts. The hot water doesn't turn. Moreover, although the green mold itself can be used any number of times, it is necessary to recreate the green mold for each product. On the other hand, there is also a problem that much time is required for finishing the obtained product.

  In view of the above problems in the prior art, the present invention has a high productivity, a low defect rate, a reasonable metal container, a metal product manufacturing apparatus and a manufacturing method and a casting press forming apparatus, a casting press forming method, and a metal. The object is to provide a molded product.

  The casting press molding apparatus of the present invention has a mold frame having a recess for storing molten metal, and a press part that can be inserted into the recess, and the press cover of the press part uses an organic tissue material, and the mold The molten metal stored in the frame is pressurized by the press unit.

  An organic tissue material can be used as the material of the mold. The organic tissue material may be Japanese paper or other paper processed products, pulp mold, wood, or wood processed products.

  The casting press molding method of the present invention presses and pressurizes the molten metal stored in the mold by a step of storing the molten metal in the recess of the mold and a pressing means having a press part that can be inserted into the recess. And a process.

  The molten metal is a molten metal of a low melting point metal, and in particular, the low melting point metal can be tin. The metal molded product obtained by such a casting press molding method is characterized by having flexibility and antibacterial properties.

  The casting press molding apparatus, the casting press molding method and the metal molded product of the present invention are a reasonable metal container and a metal product manufacturing apparatus and manufacturing method with high productivity and low defect rate.

Embodiments of the present invention will be described below.
1 and 2 are schematic views of the casting press molding apparatus 1 of the present invention, and FIG. 3 is a partial perspective view thereof. As shown in the figure, the casting press molding apparatus 1 has a mold 4 having a flat recess 3 for storing a molten metal 2 and a flat press portion 5 that can be inserted into the recess 3, and is stored in the mold 4. The molten metal 2 has a pressing means 6 that presses and presses the molten metal 2 with a pressing unit 5. The pressing means 6 can be manually operated by a lever type (not shown), and an existing air type, hydraulic type, or sliding type driving force using a motor can be used. In the present embodiment, the press unit 5 is driven in a vertical direction with respect to the molten metal surface spreading horizontally in the molten metal 2 stored in the mold 4.

  The mold 4 and the press part 5 are made of an organic tissue material, so that air can easily escape, and the air is retained in the fibers, so that the heat insulation is high. In particular, the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5 are made of the same or different organic tissue materials. As this organic tissue material, Japanese paper or other paper processed products, pulp mold, wood or wood processed products can be used. In particular, when using a processed wood product, the surface can be designed by hand-carving, surface processing using a file, CAD, CAM, or die pressing.

Hereinafter, Japanese paper and other paper processed products used for the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5 will be described.
(1) When using hand-made Japanese paper or mechanical Japanese paper (i) For the surface of the Japanese paper where fibers or wrinkles, particles or other patterns or irregularities can be seen, make use of the Japanese paper expression as it is, the concave part of the form 4 3 and the surface of the press cover 5b of the press unit 5 are used.
(Ii) When the surface of the Japanese paper is flat and there are very few irregularities (a) After moistening with moisture, a pattern such as wrinkles is made by hand or mechanical kneading and dried to form a recess 3 in the mold 4 And used as a material for the surface of the press cover 5b of the press portion 5.
(A) A pattern or unevenness is intentionally formed on the surface of Japanese paper by embossing and used as a material for the surface of the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5.
(2) In the case of using a pulp mold At the time of pulp mold molding, a textured process (fibrous, wrinkle, satin, particulate, etc.), and other designs are applied to the concave portion 3 and press portion 5 of the mold 4 Used as a material for the surface of the cover 5b.

Next, natural wood / synthetic wood / artificial wood (chemical wood, cork, synthetic cork, balsa, wood board (MDF), particle board) used for the recess 3 of the mold 4 and the press cover 5b of the press part 5 will be described.
(1) For those with a relatively fine grain pattern or unevenness on the surface of the wood, the surface of the recess 4 of the mold 4 and the surface of the press cover 5b of the press portion 5 are used as they are, making use of the expression of the wood.
(2) When the wood surface is flat and has very few irregularities, wood processing by hand carving, wood processing by CAD and CAM or CAM alone, surface processing using a file, press processing on the wood surface with a die, other special tools Is used as a material for the surface of the concave portion 3 of the mold 4 and the surface of the press cover 5b of the press portion 5.

Next, the casting press molding method of the present invention performed using the above casting press molding apparatus 1 will be described.
The casting press molding method of the present invention presses the molten metal stored in the mold 4 by the step of storing the molten metal 2 in the concave portion 3 of the mold 4 and the pressing means 6 having the press portion 5 that can be inserted into the concave 3. And a step of applying pressure. As the molten metal 2, it is convenient to use a molten metal of low melting point metal, particularly tin. As the tin ingot, 3.5N (purity of 99.95% or more) or 4.0N (purity of 99.99% or more) can be conveniently used. According to the casting press molding method of the present invention, although it is necessary to prepare the mold 4 having the recess 3 and the press portion 5 having the press cover 5b, the gates, runners and the like can be provided as in the case of performing mold casting. Need not be considered, and the molten metal 2 may be stored in the recess 3 of the mold 4. In addition, precise management of the molten metal 2 is unnecessary, and only the temperature of the molten metal need be managed. It can also handle large lots, and even when mass production is performed, it is not necessary to prepare a particularly large space. Also, even if the temperature of the molten metal 2 is low (above the melting point), the hot water can be turned to a fine part by pressing with the press part 5, and depending on the shape of the product, the hot water can be turned from the bottom to the top by the press pressure. As soon as it is molded, solidification begins. Further, the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5 can be reused if they are not damaged, and the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5 can be used even in mass production by repeated use. It can be dealt with just by detaching. There are also advantages that the quality of the product is stable and the time required for finishing is reduced.

In particular, in the casting press molding method of the present invention, it is possible to leave the characteristics of tin crystal structure unlike ordinary press molding, and tin cry (Tin Cry) which is the characteristic of tin is observed in the obtained product.
That is, in conventional press molding, it was punched with a mold and crushed with a roller, but in that method the tin crystal structure itself was crushed, and tin cry (Tin Cry), which is a characteristic of tin, can be seen. There was no. In other words, even if precision molding is possible with conventional press molding, it is not casting, and the product obtained cannot be evaluated as a casting product having characteristics as a casting. However, by using the casting press molding method of the present invention, it is possible to leave the characteristics as the casting.
In addition, in a normal press molding, a die having a high cost is required every time a product having a single design shape is molded. In addition, vibration, impact, and noise caused by punching out a metal have been problems during pressing. However, such a problem does not occur in the casting press molding method of the present invention.

  Specifically, in the casting press molding method of the present invention, unlike ordinary press molding, by using cheap Japanese paper for the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5 in comparison with the mold, Cost reduction. Further, since the pressure applied during pressing by the concave portion 3 of the mold 4 and the press cover 5b of the press portion 5 is relatively weak, there is almost no vibration, impact and noise. In addition, Japanese paper itself can be recycled even if it becomes unusable after long-term use. Furthermore, text information such as names and design patterns can be pressed onto products by simply pasting Japanese paper or other organic tissue material.

  The shape of the manufactured product is a thin plate of about 0.1mm to 2.0mm with intentionally designed patterns such as Japanese paper pattern, embossing, embossing, etc., so it can be bent easily and even with scissors Can be cut into In addition, when tin is used, it is a metal that has very high antibacterial and antifungal properties, so it becomes a product that can be used in a myriad of ways, depending on the way the person picks it up from a single tin plate.

  Therefore, by using it as a partition in the balun / lunch box, the propagation of germs and the like in the lunch box can be suppressed. Moreover, by using it for the antibacterial sheet in the refrigerator, there is an advantage that the thermal conductivity is good and it is easy to cool, and the mold does not propagate. Furthermore, the shape can be freely changed, and the antibacterial performance is high.

The shape can be freely changed, the antibacterial performance is high, and it is easy to spread and wash, so it can be used for squeezing mouths such as fresh cream.
It can be cut into thin strips that can be easily wound and used as a binding band.
You can use it as a chopstick rest because it is easy to cut it into an appropriate size.

It has high antibacterial properties, is silvery and has a high-class feeling, and can be easily changed in shape, so it can be used as a Buddhist accessory for Buddhist altars.
Since it can be easily cut with scissors, it can be used as an insole for shoes because it can be cut into a sole and spread on the sole to suppress the growth of bacteria.
Since it can be bent easily, it can be used in place of a high-grade wrapping paper to improve the sense of quality.
It can be cut into any size and can be bent easily, so it can be used for small vessels that serve appetizers at restaurants.

4 and 5 are schematic views of a casting press molding apparatus 1a according to another embodiment of the present invention, and FIG. 6 is a partial perspective view thereof. The difference from the above-described embodiment is that the concave portion 3a and the press portion 5a are not a flat shape formed by a flat surface but a curved shape formed by a curved surface. The casting press molding apparatus 1a can also carry out the casting press molding method of the present invention in the same manner as the above-described casting press molding apparatus 1, and can produce a product having a curved surface.
In the present embodiment, the press portion 5a is driven in the vertical direction with respect to the horizontal molten metal surface of the molten metal 2 stored in the mold 4.

It is a schematic diagram of the casting press molding apparatus of one embodiment of this invention. It is another schematic diagram of the casting press molding apparatus of one embodiment of this invention. It is a fragmentary perspective view of the casting press molding apparatus of one embodiment of this invention. It is a schematic diagram of the casting press molding apparatus of other embodiment of this invention. It is another schematic diagram of the casting press molding apparatus of other embodiment of this invention. It is a fragmentary perspective view of the casting press molding apparatus of other embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 ... Casting press molding apparatus, 4 ... Formwork, 3 ... Recessed part, 2 ... Molten metal, 5 ... Press part, 5b ... Press cover, 6 ... Press means.

Claims (2)

A mold having a recess for storing a molten tin, and a press part that can be inserted into the recess, and the mold and the press part are made of Japanese paper or a processed wood product, and are stored in the mold A casting press molding apparatus, wherein pressurization is performed by bringing the moved pressing portion into contact with the molten tin. A step of storing the molten tin in the recess of the mold, and a step of bringing the moved press portion into contact with the molten tin stored in the mold by pressing means having a press portion that can be inserted into the recess; and A casting press molding method, wherein the mold and the press part are made of Japanese paper or a processed wood product.

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