JPS63246108A - Key holder, its production and die cast - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a key chain for automobiles, door keys, etc. More specifically, it relates to a key chain that connects metal coin-shaped medals with a chain and attaches a name, various commemorative characters, marks, or product trademarks to the medals, a manufacturing method thereof, and a die-casting mold thereof. .

[Prior art] For example, the prior art shown in FIG. 6 is known.

(Refer to Utility Model Application Publication No. 180580/1983) A hole is made in a part of the disc-shaped medal (50〉), and the chain 52
is the through line. Both ends of the chain 52 are connected to open ends of a ring 51 made of an annular metal plate with a concave cross section. After the chain 52 and ring 51 are passed through the hole of the key, they are inserted against the annular elasticity to elastically fix the medal 1. As shown in FIG. 7, the medal 50 does not have an uneven surface on its outer circumferential surface 9 Therefore, a groove 53 is formed on the inner circumferential surface of the ring 51 to form the medal 50.
Hold it so that it does not move. This medal 50 is made by punching with a press. In order to create irregularities on this outer periphery, machining such as turning is required. In addition, in order to add an uneven pattern such as a mark or trademark to the front and back of the medal (50), it is necessary to make a mold for the medal with the pattern, place the medal in this mold, and apply pressure with a press machine to form the medal. There is a need to.

[Problems to be Solved by the Invention] The method for manufacturing medals described above is efficient for producing large quantities of medals, such as coins, that have the same shape and do not have an uneven pattern on the outer periphery. Even if a pattern is added, it is only a matter of creating streaks in the punching direction. Furthermore, in order to add patterns to the front and back sides of medals, it is necessary to prepare as many molds as there are patterns for each type of pattern. That is, machining alone requires two or more steps of punching and stamping, and it is necessary to prepare many types of stamping dies for each punching die pattern. The present invention provides a key holder that can meet the demand for key holders in a wide variety of small quantities, a manufacturing method thereof, and a die-cast mold thereof.

[Means for Solving the Problems] The present invention takes the following means for solving the above problems.

■, a partially open annular ring (10) and a ring (10)
) connected to both open ends of M (7) and chain (7)
In a key chain having a disk-shaped medal (1) connected to
This key holder is characterized in that the inner peripheral surface of the ring (10) has a concave groove (16) that engages with the outer peripheral protrusion (3) of the medal.

■, a partially open annular ring (10) and a ring (10)
) chain (7) connected to both open ends of chain (7)
A method for manufacturing and using a key chain having a medal (1) with a protruding disk-shaped outer periphery that is connected to a die-casting die-casting die-casting method by placing the outer circumferential protrusion of the medallion (1) at the joint between a fixed die-casting die and a movable die-casting die. This is a medal manufacturing method characterized by casting.

01 A die-casting mold for manufacturing disc-shaped medals (1), rings (20), etc., which includes a fixed die (21) and the fixed die (22) arranged opposite to the fixed die (22).
1), a movable die that approaches and separates from the fixed die and the movable die (22), and a member (36) that is removably attached to and facing the fixed die and the movable die (22) and is provided to form the shape of the medal (1) or the like.
).

(41), and both members (36) and (41). This is a guy cast mold for manufacturing medals and the like, which is provided with an injection port and a runner for pressurized injection of molten metal into the space provided between the two members (36) and (41).

[First embodiment of key chain] What is shown in FIG. 1 shows the first embodiment of the present invention. The medal 1 has a disk shape and is made of metal such as zinc by die-casting as described later. An uneven mark is attached to the end face 2 of the medal 1, and this uneven mark is a registered trademark.

Create the necessary uneven shapes such as pet marks and initials.

Furthermore, these marks may be colored.

Instead of using uneven marks, the surface may be flattened and the marks and the like may be printed thereon.

At the center of the circumferential surface of the medal 1 in the thickness direction, there is a convex outer circumferential protrusion 3.
is provided. This outer peripheral protrusion 3 fits into a groove 16 of a ring 10, which will be described later. A ring attachment part 4 is provided on the outer periphery of the medal 1, and a small hole 5 is bored in the ring attachment part 4. A ring 6 is attached to this small hole 5 through the hole of the small hole 5. Furthermore, the chain 7 is attached to the ring 6.
is the through line. M7 is a twisted oval-shaped ring in the figure, but it is not limited to this; it can be any type of chain that is normally used for decoration or accessories worn on the body, such as an oval circle. good.

The ring 10 is made by bending a metal plate. Both ends of this ring 10 are flat, and a small hole 12 is made in the flat part 11. The flat tip is chamfered 13. This is to prevent it from getting caught on clothing during use. A small ring 14 is passed through the small hole 12, and the chain 7 is passed through this small ring 14. The inner circumferential hole 15 of the annular ring 10 is provided with a groove 16 along the inner circumference of the inner circumferential hole 15 . The outer peripheral protrusion 3 has a ring 10
It gets stuck in the concave groove 16 and cannot be easily removed.

−Holder tag When using this key chain as a name, please use it on your bag,
Pass the medal 1 or the ring 10 through the handle of a bag or the like, and after passing it through, use the chain 7 part as the handle and insert the medal 1 into the inner peripheral hole 15 of the ring 10 against the elasticity of the ring 10. The outer peripheral protrusion 3 of the medal 1 fits into the groove 16 of the ring 10 and cannot be easily removed.

When used as a key chain, the ring 10 and the chain 7 are passed through the key hole at the same time, and then the medal 1 is inserted into the ring 10 to form the state shown in FIG.

[Second embodiment of medal] What is shown in FIG. 3 shows an embodiment in which the medal 1 is composed of a ring 20. The entire medal 1 of the embodiment described above is made of the same metal, but in this embodiment, only the annular ring 20 is made of metal. The casting mold for the ring 20 is one in which the 36° cylinder 41 of the die-casting mold 30 described later is replaced, and the end surface 37 of the cylinder 36 and the end surface 42 of the cylinder 41 are brought into direct contact (FIG. 5(b)). , there is no need to manufacture a special mold for the ring 20.

A mold hole 21 is formed in the ring 20, and the insertion cylinder 23 portion of the lid 22 made of synthetic resin is inserted and fixed into the mold hole 21 from both sides of the mold hole 21.

When inserted, the collar 26 of the lid 22 stops at the end surface of the ring 20. The lid 22 and M22 are fixed to the ring 20 by interposing an adhesive on the inner end surface 24. Since the inner end surfaces 24 are flat, even if no adhesive is used, if the inner end surfaces 24 are pressed together, there will be no air between them, creating a vacuum state, allowing them to be pressed together using atmospheric pressure.

Moreover, if the lid 22 is made of transparent synthetic resin, both molds 22.
If a photo, picture, etc. is placed between the 22 and fixed with adhesive or vacuum suction, it can function not only as a key chain but also as a pendant. Outer end surface 25 of lid 22
By performing printing or other processing on the material, there is no need for press molds or die-cast molds for each pattern, and trademarks, marks, etc. can be easily displayed.

[Method for manufacturing the medal of the first embodiment] A hot I-chamber type die-casting machine is used to manufacture the medal 1 of the present invention. The hot chamber type has a molten metal heat-retaining furnace built into the casting machine, and the pressurized chamber for injecting the molten metal forms part of this furnace and is constantly heated. Molten metal injection is sometimes performed using compressed air, but in recent years, injection is performed using hydraulic pressure via a flagger, and the pressure is as high as 70 to 350 atm. Mold clamping.

All operations in one casting cycle, such as pouring, opening the mold, and peeling off the product, are automated, and casting is performed at a high speed of 100 to 1,000 shots (number of castings) per hour. However, since the pressurized chamber is always immersed in the molten metal, this is a GI machine for low fusion alloys such as zinc alloys and below.

What is shown in FIG. 4 is a die-casting die of the die-casting machine for producing medals 1 made of zinc alloy. The die-casting mold 30 is divided into a fixed mold 31 and a movable mold 32, which are usually used side by side. Guide pins 33 are provided at the four corners of the fixed mold 31, and the guide pins 33 are inserted into and positioned in the guide pins 634 of the movable mold 32, and both molds are used while being clamped. At approximately the center of the fixed mold 31, a removable mold 39 is fixed to the fixed mold 31 by screws or the like.

A cylindrical hole 35 is bored in each of the three removable molds, and a cylinder 36 is fitted into this hole 35. End face 3 of cylinder 36
7 is engraved with a pattern in which the unevenness of the pattern on the end surface 2 of the medal 1 is reversed. On the opposite end surface of the cylinder 36,
There is a screw hole, and the cylinder 36 can be attached to the removable type 34 in this screw hole.
A bolt 38 is screwed in for fixing to. By turning the bolt 38, the cylinder 36 is firmly fixed to the removable mold 39. To adjust the thickness of the medal 1, a washer or the like is interposed between the surface of the cylinder 36 where the screw hole is provided and the bottom surface of the hole 35 to adjust the thickness of the medal.

Moreover, when changing the pattern of the medal 1, it is only necessary to replace the cylinder 36, and there is no need to replace the entire die-cast mold 30. The medal 1 described above is often used for sales promotions, souvenirs, etc., and the end face 2 of the medal 1 is required to have various patterns such as trademarks, marks, initials, etc. of the orderer. In this embodiment, these orders can be met by simply replacing the cylinder 36. A removable mold 40 identical to the fixed mold 31 is provided on the movable mold 32 at a position opposite to the fixed mold 31. The cylinder 41 also has a similar structure to the cylinder 36 and is provided facing each other. A pattern is formed on the end surface of the cylinder 41 similarly to the end surface 37. Various patterns can be created by combining with the above patterns.

The diagram shown in FIG. 5(a) shows the state in which the medal 1 is cast. The molten zinc alloy is pressurized with the fixed mold 31 and the movable mold 32 combined, but since there is a mating surface 43, it is inevitable that cracks will appear on the outer periphery of the medal 1. A special process is required to remove this paris. For this reason, the medal 1 of the present invention is provided with an outer peripheral protrusion 3 on the outer periphery. The outer circumferential protrusion 3 is thinner than the main body of the medal 1, so the flow of hot water is slightly impaired due to flow resistance and cooling, so there is less flaking. Further, although the outer periphery of the outer peripheral protrusion 3 is slightly larger, it is reduced to such an extent that there is no problem in practical use, so there is no need for a special process of shaving off the outer periphery. This outer peripheral protrusion 3 is located at the concave portion of the ring 10 as described above.
? It also functions to fit into the ring 416 and securely fix the medal 1 to the ring 10.

[Method 1 for manufacturing the ring 20 of the second embodiment The casting mold for the ring 20 is the cylinder 3 of the die-casting mold 20 described above.
61 Replace the cylinder 41 and connect the end face 37 of the cylinder 36 and the cylinder 4.
1 (Fig. 5(b)).
), there is no need to manufacture a special mold for this example.

In this way, this die-casting mold 30 has a medal 1 and a ring 2.
0 can be cast in the same mold.

[Other Manufacturing Methods] The above-mentioned embodiments are all related to the manufacturing method of the medal 1, but the die-cast mold 30 described above can also be manufactured into a three-dimensional shape. What is shown in FIG. 8 is an example thereof. A die-cast product 60 having a three-dimensional shape and an opposite groove 61 are formed in the cylinder 41.36. Cylinder 41
When the cylinder 36 and the cylinder 36 face each other and are brought into contact with each other, the cylinder 41 and the flat part 62 of the cylinder 36 come into close contact. Concave groove 61 of cylinder 41
and the concave groove of the cylinder 36, creating the same space as the three-dimensional die-cast product 60, into which molten metal is supplied from the runner 63 and the three-dimensional die-cast product 60 is cast. Furthermore, the cylinders 36 and 41 have a cylindrical shape,
The cross section is not limited to a cylinder, and may have a rectangular or elliptical shape.

[Effects of the Invention] As described in detail below, since the medal of the key chain of the present invention has protrusions on the outer periphery, the medal 1 can be easily attached and removed, and will not come off. Furthermore, since the medals are cast using the die-casting method described above, a wide variety of shapes can be manufactured with fewer steps. Furthermore, since a cylinder that can be replaced with a die-cast mold is provided, the number of types of guy-cast molds can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an overview diagram showing the implementation of Fig. 1 of the present invention, Fig. 2 is a sectional view taken along the line ■-■ of Fig. 1, Fig. 3 is a second embodiment of the key chain, and Fig. 4 is for manufacturing medals. Die-casting mold, Figure 5 is a cross-sectional view of the medal casting part of the die-casting type, Figure 6 is a conventional key holder technology, Figure 7 is a cross-sectional view of Figure 6, and Figure 8 is a diagram showing the manufacturing method of other products. It is. 1... Medal, 3... Outer periphery protrusion, 7... Chain, 10
···ring. 20... Circular ring, 30... Die-casting type, 36.41
・・・Cylinder

Claims (1)

[Claims] 1. A partially open annular ring (10);
) chain (7) connected to both open ends of chain (7)
In a key chain having a disk-shaped medal (1) connected to
A key holder characterized in that the inner peripheral surface of the ring (10) has a concave groove (16) that engages with the outer peripheral protrusion (3) of the medal. 2. A partially open annular ring (10) and a ring (10)
) chain (7) connected to both open ends of chain (7)
In the method for manufacturing a key chain having a medal (1) with a protruding disk-shaped outer periphery connected to a key chain, the outer circumferential protrusion of the medal (1) is placed at the joint between a fixed mold and a movable die-cast mold, and die-casting is performed. A medal manufacturing method characterized by the following. 3. A die-casting mold for producing disk-shaped medals (1), rings (20), etc., which includes a fixed die (21) and the fixed die (22) arranged opposite to the fixed die (22).
1), a movable die that approaches and separates from the fixed die and the movable die (22), and a member (36) that is removably attached to and facing the fixed die and the movable die (22) and is provided to form the shape of the medal (1) or the like.
), (41), and both members (36), (41), and a cast mold for manufacturing medals, etc., provided with an injection port and a runner for pressurized injection of molten metal into the space provided between both members (36), (41).