KR20050109693A - Mold for sinker and manufacture method using that mold - Google Patents

Abstract

The present invention relates to a rod casting mold for forming a fishing hook combined with a dore or a pin, and more particularly, a center groove formed at a center, fixed and separated on a turntable that is vertically rotated, and spaced apart from a center by a predetermined distance. A lower mold including a plurality of cavity portions formed at predetermined intervals at a predetermined position, a dore or pin-shaped groove formed on the side of the cavity, and a runner connecting the central groove and the cavity portion;

An upper mold consisting of the lower center groove, the cavity portion, the dore or pin-shaped groove, and the spouts corresponding to the runners, the cavity portion, the groove of the dore shape, and the runner; It relates to a casting mold of a fishing weight consisting of.

The casting mold of the fishing weight as described above can be produced by using natural rubber and synthetic rubber which is cheap and easy to mold, and can easily manufacture the mold and greatly reduce the manufacturing cost. Since it can produce a large amount in a short time, it can maximize the productivity, and also manufacture the fishing weight using a centrifugal casting molding apparatus has the effect of minimizing the defect rate because the structure of the casting is dense and there are no defects such as pore generation.

Description

Casting mold of fishing weight and fishing method using same. {MOLD FOR SINKER AND MANUFACTURE METHOD USING THAT MOLD}

The present invention relates to a casting mold of a fishing weight for forming a fishing hook combined with a dore or a pin, and more particularly, a central groove fixed and separated on a turntable that is vertically rotated, and formed in the center, and fixed from the center. A lower mold including a plurality of cavity portions formed at predetermined intervals at a distance spaced apart, a dore or pin-shaped groove formed on the side of the cavity, and a runner connecting the central groove and the cavity;

An upper mold consisting of the lower center groove, the cavity portion, the dore or pin-shaped groove, and the spouts corresponding to the runners, the cavity portion, the groove of the dore shape, and the runner; It relates to a casting mold of a fishing weight consisting of.

In general, fishing rods do not allow the fishing line to sink quickly to stay in the desired position, and also to prevent the fishing needles from being swept away by the flow of water. It is widely used for fishing.

As a method of manufacturing such fishing weight, in the past, molten metal was manufactured by pouring molten metal into a mold having a space portion that looks like the shape of the fishing weight. However, the manufacturing method of the fishing weight increases the manufacturing cost by consuming a lot of working manpower and time. There was.

In order to solve this problem, Utility Model Registration Application No. 89-6810 has been proposed, which shows a mold 130 showing the shape of a weight as shown in FIG. 4, and a spout for injecting molten metal into the mold 130. 140 and the inner surface of the mold 130 and the tapping hole 150 having the spouts 140 are formed at the same time, and at the same time, the exhaust hole 160 which communicates from the upper end of each mold 130 to the outside is formed. It relates to a mold for manufacturing fishing net weights, and because the molten metal is filled in the mold 130 depending on gravity alone, the blurring of the molten metal is slow and there is a high possibility that pores or the like may occur on the surface of the casting, and there is a limit in increasing the number of the mold 130. There is a problem such as not greatly improving the productivity.

The present invention for solving the above problems can easily manufacture a fishing weight, in particular a fishing weight combined with a pin or a dore, it is possible to minimize the defective rate, to provide a casting mold of the fishing weight that can maximize productivity There is a purpose.

The present invention devised to achieve the above object is a method for manufacturing a fishing weight, the lower groove is formed with a central groove, a cavity portion corresponding to the shape of the fishing weight, and a runner connecting the central groove and the cavity portion; Seating on a turntable; mating the upper mold having the spouts, cavity portions, and runners corresponding to the central groove, the cavity portion, and the runner of the lower mold, respectively, with the lower mold; vertically rotating the turntable on which the lower mold and the upper mold are seated And a step of injecting molten metal, such as lead and copper into the tuyere of the upper mold.

And grooves or pin-shaped grooves are further provided on the side portions of the lower and upper cavity portions, and the dore or pins are seated in the lower-shaped grooves or pin-shaped grooves. It further provides a method of manufacturing a fishing weight, characterized in that for manufacturing a fishing hook combined with a dore or pin.

On the other hand, it is fixed and separated on the turntable rotated vertically, the central groove formed in the center, a plurality of cavity parts formed at a predetermined interval at a predetermined distance from the center, and a pin or dole shape formed on the side of the cavity A lower mold comprising a groove and a runner connecting the central groove and the cavity;

An upper die formed of a central groove of the lower die, a cavity portion, a groove of a dore shape, and a spout corresponding to each of the runners, the cavity portion, the groove of a doe shape, and a runner; It provides a casting mold of the fishing weight consisting of.

And it provides a casting mold of the fishing weight which is further provided with a conical projection in the center groove of the lower mold.

In addition, it provides a casting mold of the fishing weight formed with two or more fixing grooves on the edge of the upper and lower molds.

The materials of the lower mold and the upper mold are synthetic rubber such as natural rubber or styrene butadiene rubber (SBR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene propylene rubber (EPDM), butadiene rubber (BR), and silicone rubber. It provides a casting mold of the fishing weight consisting of any one of.

In addition, the material of the lower mold and the upper mold provides a casting mold of a fishing weight made of any one of metal such as carbon steel, alloy steel, beryllium steel, aluminum, cast iron, cast iron.

Hereinafter, a preferred embodiment of the casting mold of the fishing weight of the present invention will be described in detail with reference to the drawings, the present invention is not limited to this embodiment.

Figure 1a is a schematic perspective view showing a first embodiment of the casting mold of the fishing weight of the present invention, Figure 1b is a view showing a fishing weight cast by the first embodiment of the present invention, Figure 2a of the present invention 2 is a view showing a part of the casting mold of the fishing weight of the second embodiment, Figure 2b is a view showing a fishing weight cast by the second embodiment of the present invention.

On the other hand, the basic mechanical elements, such as bolts and nuts for coupling and fixing the major elements in each drawing are parts that can be commonly known to those skilled in the art, so the illustration is omitted, mainly shown in the parts related to the present invention. In particular, the size ratio between the components are somewhat different, but the differences in these drawings are easily understood by those skilled in the art, so a separate description is omitted.

According to a first preferred embodiment of the casting mold of the fishing weight of the present invention, as shown in FIG. 1A, the lower mold 20 has a central groove 210, a plurality of cavity portions 230, and a plurality of central grooves 210 and a plurality of cavities. The upper mold 10 is composed of a runner 220 connecting the portion 230, the upper mold 10, the plurality of cavity 130, and the runner 120, the upper mold 10 and the lower mold 20 is formed to form a space portion of a fishing weight shape to be manufactured.

The upper mold 10 is formed in the center in order to inject the molten lead or copper melt into the cavity 130, the center of the upper mold 10 is rotated by the rotation of the turntable of the centrifugal casting apparatus The runner 120 is formed to allow the molten metal injected into the mouthpiece 110 by the centrifugal force to flow into the cavity 130. A plurality of cavity portions 130 are formed at positions spaced apart from the center by a predetermined distance.

The shape of the cavity portion 130 corresponds to the shape of the fishing weight to be manufactured, the cavity 130 in the first embodiment of the present invention is a groove corresponding to the body shape of the fishing weight shown in Figure 1b ( 130 is formed, and grooves 142 corresponding to the tore are formed at both ends.

In addition, the gate 135, which is a connection portion between the runner 120 and the cavity part 130, is preferably located in the cavity part closest to the center, so that the molten metal is squeezed out of the cavity part 130 without empty space. . In addition, the gate portion 135 may be formed to have a narrower diameter toward the cavity 130 so that a more beautiful casting can be obtained.

In addition, the lower mold 20 has a central groove 210 temporarily receiving the molten metal injected through the molten iron 110 of the upper mold 10 at a position corresponding to the molten iron 110 of the upper mold 10. The runner 220 and the cavity part 230 corresponding to the runner 120 and the cavity part 30 of 10 are formed.

A conical protrusion 210a is formed on the bottom surface of the central groove 210, so that molten metal injected through the spout 110 of the upper mold 10 smoothly around the central groove 210. It is preferable to allow the molten metal to more easily flow to the runner 220.

Meanwhile, in the first embodiment of the present invention, rubber is used as the material of the upper mold 10 and the lower mold 20, and the rubber which can be used here is natural rubber and styrene higher than the melting point of 327 ° C of lead used to manufacture the fishing weight. Butadiene rubber (SBR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene propylene rubber (EPDM), butadiene rubber (BR), silicone rubber, and the like, and more particularly, heat resistance It is preferable to use chloroprene rubber and silicone rubber.

In the first embodiment of the present invention, the rubber is used as the material of the upper mold 10 and the lower mold 20, but the carbon tool steel, alloy tool steel, beryllium steel, aluminum, cast iron, alloy are generally used as materials of the mold. Metal such as cast iron can be used.

In addition, when manufacturing the fishing weight made of copper, it is preferable to use the material of the upper mold 10 and the lower mold 20 of the casting mold of the fishing weight of the present invention as graphite.

Figure 2a is a view showing a part of the casting mold of the fishing weight of the second embodiment of the present invention, as shown in Figure 2b grooves 130, 230 corresponding to the fishing weight coupled pins 325 on both sides, that is, the cavity portion ( 130 and 230 are formed in the upper mold | type 10 and the lower mold | type 20. As shown in FIG. By using the casting mold of the fishing weight as described above it can be manufactured a fishing weight 320 coupled to the pin 325 as shown in Figure 2b.

Hereinafter, a method of casting a fishing weight by installing a casting mold of a fishing weight of the present invention in a centrifugal casting molding apparatus will be described with reference to FIGS. 1A and 3.

3 is a view showing a state in which the casting mold of the fishing weight of the present invention is fixed to the centrifugal casting apparatus.

The manufacturing method of the fishing weight using the casting mold of the fishing weight of the present invention is large

1) mounting the lower die 20 on the turntable 40;

2) combining the upper mold 10 on the lower mold 20;

3) vertically rotating the turntable 40 on which the lower mold 20 and the upper mold 10 are seated;

4) injecting molten metal into the molten metal 110 of the upper mold 10

Is made of.

In addition, in order to manufacture the fishing rods 310 and 320 to which the dore or the pin is coupled, the step of seating the dore or the pin in the groove or the pin-shaped grooves 142 and 144 of the lower die after the step of mounting the lower die is further included.

When it is described in detail with respect to the first of the casting mold of the fishing weight of the present invention seating the dore 315 or the pin 325 in the grooves (142, 144) corresponding to the dore or the pin of the lower mold 20, the lower mold ( 20) is fixed on the turntable 40 coupled with the rotating shaft 420 of the centrifugal casting apparatus.

At this time, two or more fixing pieces 410 are formed on the edge of the turntable 40, and fixing grooves 150 and 250 corresponding to the fixing pieces 410 are formed in the upper mold 10 and the lower mold 20. It is preferable to make it. This is to prevent the lower mold 20 and the upper mold 10 from being separated on the turntable 40 during the high speed rotation of the turntable 40.

The upper die 10 is then mated with the lower die 20, and then the drive of the turntable 40 is driven to rotate the turntable 40 at high speed. In this way, the molten metal melted with lead or copper in the state in which the turntable 40 rotates at high speed is injected into the spout 110 of the upper mold 10.

The molten metal injected into the molten iron 110 flows into the central groove 210 of the lower mold 20, and the molten metal flows through the runners 120 and 220 through the centrifugal force generated by the high speed rotation of the turntable 40. 130, 230). When the turntable 40 is driven and stopped until the molten metal injected into the cavities 130 and 230 is solidified, the fishing weights 310 and 320 to which the tore or the pin are coupled are completed.

When the fishing weight is formed by the centrifugal force as described above, the molten metal is bathed in the cavity 230 so that the structure of the casting is dense and there are no defects such as the occurrence of pores. By doing so, there is an advantage that can greatly improve productivity.

By manufacturing the casting mold of the fishing weight of the present invention as described above using natural rubber and synthetic rubber, there is an effect that can easily produce a mold and greatly reduce the production cost.

In addition, the fishing weight, in particular, can be produced in large quantities in a short time the fishing weight combined with a dore or fin has another effect to maximize productivity.

In addition, since the fishing weight is manufactured using a centrifugal casting molding apparatus, there is another effect of minimizing the defective rate because the structure of the casting is dense and there are no defects such as the occurrence of pores.

Figure 1a is a schematic perspective view showing a first embodiment of the casting mold of the fishing weight of the present invention.

1B is a view showing a fishing weight cast by the first embodiment of the present invention.

Figure 2a is a view showing a part of the casting mold of the fishing weight of the second embodiment of the present invention.

Figure 2b is a view showing a fishing weight cast by the second embodiment of the present invention.

Figure 3 is a view showing a state in which the casting mold of the fishing weight of the present invention fixed to the centrifugal casting molding apparatus.

4 is a view showing a conventional fishing casting die.

※ Explanation of symbols about main part of drawing ※

10: Pictograph 110: Tanggu

120, 220: Runner 130, 230: Cavity

150, 250: fixing groove

20: lower mold 210: central groove

210a: protrusion

40: turntable 410: fixed piece

Claims (7)

In the method of manufacturing a fishing weight, Mounting a lower die having a central groove, a cavity portion corresponding to the shape of the fishing weight, and a runner connecting the central groove and the cavity portion on a turntable; Combining the upper mold with the spouts, cavity portions, and runners corresponding to the central groove, the cavity portion, and the runner of the lower mold, respectively; Vertically rotating the turntable on which the lower mold and the upper mold are seated; And injecting molten metal such as lead and copper into the hot water spout of the upper mold. The method according to claim 1, further comprising a groove or pin-shaped groove on the side of the lower mold and the upper mold cavity, and the step of seating the sole or pin on the lower mold or pin-shaped groove; The method of manufacturing a fishing weight, further comprising manufacturing a fishing hook combined with a dore or a pin. It is fixed and separated on the turntable to be vertically rotated, the center groove formed in the center, a plurality of cavity parts formed at a predetermined interval at a predetermined distance from the center, and a dore or pin shape formed on the side of the cavity A lower mold comprising a groove and a runner connecting the central groove and the cavity; An upper die formed of a spout, a cavity portion, a recessed groove, and a runner corresponding to the lower center groove, the cavity portion, the groove or the fin-shaped groove, and the runner, respectively; Casting mold of fishing weight, characterized in that consisting of. 4. The casting mold of a fishing weight according to claim 3, wherein a conical protrusion is further provided in the central groove of the lower die. The casting mold of claim 4, wherein two or more fixing grooves are formed at edges of the upper mold and the lower mold. The material of any one of claims 3 to 5, wherein the material of the lower mold and the upper mold is natural rubber or styrene butadiene rubber (SBR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), and ethylene propylene rubber (EPDM). , Butadiene rubber (BR), the casting mold of the fishing weight, characterized in that made of any one of synthetic rubber, such as silicone rubber. The fishing rod according to any one of claims 3 to 5, wherein the lower mold and the upper mold are made of any one of metal such as carbon steel, alloy steel, beryllium steel, aluminum, cast iron, and cast iron. Casting mold.