JPH11104810A - Metallic glass-made formed product and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic glass-made formed product and a method for easily producing the metallic glass-made formed product. SOLUTION: In a lower die 5' in a pressing die 6 composed of an upper die 4 and the lower die 5 having no fitting part mutually fitted, a metallic material is set. The metallic material is melted with a high energy heat source and the obtd. molten metal at a m.p. or higher is pressed with the pressing die 6 and deformed into a prescribed shape. At the same time of deforming or after deforming, the molten metal is cooled at a critical cooling speed or more to produce a metallic glass-made formed product having a prescribed shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product made of metallic glass and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, in order to produce a molded product made of metallic glass (amorphous alloy material), a metallic material is melted and rapidly solidified from a liquid state to obtain a quenched metal (alloy) powder.
There are various methods such as solidifying the obtained quenched metal powder into a predetermined shape at a crystallization temperature or lower to obtain a true density, and quenching and solidifying a molten metal or alloy to directly obtain a molded product made of metallic glass having a predetermined shape. Proposed.

[0003]

However, most of the molded products made of metallic glass obtained by these conventional methods have a small mass. For example, the molded products are bulky enough to be used for the face of a golf club head. It was difficult to obtain wood. For this reason, a method of obtaining a bulk metallic glass molded product by solidification of quenched powder has been attempted, but a bulk material having sufficient properties such as high strength and high toughness required for the face of a golf club head has been developed. Could not be obtained.

Further, as shown in FIG. 17 (a), a press die composed of an upper die a and a lower die b having fitting parts to be fitted to each other, ie, an upper die a and a lower die b. Is a method in which a molten metal c is pressed and quenched in a press mold 有 す る having vertical surfaces g and g respectively to the parting line to produce a metal glass molded article having a predetermined shape (for details, The present inventor has conducted experiments by repeating a great deal of trial and error with respect to a method of melting the metal material set in b using a high-energy heat source and pressing the obtained molten metal c into a predetermined shape. Was. However, when the molten metal c is pressed by the upper die a and the lower die b, as shown in FIGS.
Excess molten metal c flows between the vertical surface g of the lower mold b and the vertical surface g of the lower mold b (small gap d in the fitting portion), whereby the molten metal c entering the gap d is rapidly increased. The burr portion f is cooled and solidified, and the burr portion f causes various adverse effects. That is, the upper die a
And the vertical surfaces g, g of the lower mold b are damaged {causing "galling"), and when the molten metal c flows into the fitting portion (gap d), the mold cannot be closed. It was found that it was not possible to obtain a product e (molded product made of metallic glass) having a shape h and a predetermined thickness h. Further, it has been found that when the mold closing is poor, the mold itself wears out and the life is shortened.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a molded product made of metallic glass having excellent strength properties and a method of easily producing a molded product made of metallic glass. I do.

[0006]

In order to achieve the above-mentioned object, a molded product made of metallic glass according to the present invention comprises a press formed of an upper die and a lower die having no fitting portion for fitting each other. A metal material is placed on the lower mold of the mold, and the metal material is melted using a high-energy heat source capable of melting the metal material. The molten metal is deformed into a predetermined shape by pressing to cool the molten metal at or above the critical cooling rate at the same time as or after the deformation, thereby producing the metal in the predetermined shape. Also, the golf club head is manufactured as a face body.

Further, in the method of manufacturing a metallic glass molded product according to the present invention, a metal material is placed on the lower die of a press die composed of an upper die and a lower die which does not have a fitting portion to be fitted to each other. Then, using a high-energy heat source capable of melting the metal material, the metal material is melted, and the molten metal having a melting point equal to or higher than the obtained melting point is removed from the upper mold.
The molten metal is deformed into a predetermined shape by pressing with a lower die, and the molten metal is cooled at a critical cooling rate or higher at the same time as or after the deformation to produce the predetermined shape.

The lower mold has a cavity and the upper mold has a smooth surface. The lower mold has a radius of curvature of 5in.
The upper die is a smooth surface having a convex curved surface or a flat surface having a radius of curvature of 5 inches or more, while having a concave curved surface or a planar cavity portion of ch or more.

In addition, a gap having a gap size of 0.1 mm to 3.0 mm and a width size of 4.0 mm to 20.0 mm is provided at a portion along the parting surface of the upper mold or the lower mold so as to be formed during molding. Excess molten metal is allowed to escape to the gap. The golf club head is manufactured as a face body.

[0010]

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

FIG. 1 shows a manufacturing apparatus F for producing a metallic glass molded article of the present invention. The metallic glass molded article produced by the producing apparatus F is, for example, shown in FIGS. It is used as the face body 1 of the wood type golf club head 2 and the face body 1 of the iron type golf club head 2 as shown. The metal glass molded product of the present invention is characterized by being produced by the production method described below.

First, the manufacturing apparatus F will be described. As shown in FIGS. 1 and 2, the manufacturing apparatus F includes a press die 6 including an upper die 4 and a lower die 5 and a cavity 7 of the lower die 5.
An arc electrode (tungsten electrode) 8 for arc-melting the metal material installed in the metal mold; a cooling water supply device 9 for circulating cold water to the upper die 4 and the lower die 5 of the pressing die 6 and the arc electrode 8; A vacuum chamber 10 for accommodating the mold 6 and the arc electrode 8, a lower mold moving mechanism 11 driven by a motor 13 and moving the lower mold 5 in a horizontal direction,
And an upper die moving mechanism 12 that is driven by 14 and moves the upper die 4 in the vertical direction.

The lower die moving mechanism 11 is not particularly limited, and a conventionally known translation mechanism or reciprocating mechanism can be used. For example, a drive screw using a ball screw and a traveling nut or an air cylinder can be used. A hydraulic mechanism such as a pneumatic mechanism or a hydraulic cylinder can be suitably used. Also, the upper die moving mechanism 12 is not particularly limited, and may be any conventionally known press die mechanism, such as a hydraulic mechanism or a pneumatic mechanism. Further, other cooling medium (for example, refrigerant gas) may be used other than the cooling water.

The arc electrode 8 is connected to an arc power supply 15 and is arranged at a slight angle to the depth of the cavity 7 of the lower mold 5. The X-axis, Y-axis and Z-axis are driven by a stepping motor 16. It is configured to be adjustable in the axial direction. Further, the position of the metal material is measured by the semiconductor laser sensor 17 in order to keep the distance (Z-axis direction) between the metal material on the lower die 5 and the arc electrode 8 constant. The movement may be automatically controlled. This is because if the gap between the arc electrode 8 and the metal material is not constant, the arc becomes unstable and the melting temperature varies. Further, a cooling gas (for example, Ar gas) injection port may be provided in the vicinity of the arc generating portion of the arc electrode 8, and a cooling gas may be injected from a gas supply source (gas cylinder) 18 to promote rapid cooling after heating. .

The vacuum chamber 10 has a water cooling jacket structure made of SUS, and an oil diffusion vacuum pump (diffusion pump) 19 and an oil rotary vacuum pump (rotary pump) 20 are connected by a vacuum exhaust port to evacuate. The gas supply source (gas cylinder) 21 is connected by an argon gas inlet so that replacement with an inert gas is possible. Further, the cooling water supply device 9 cools the circulation return cooling water with the coolant, and then supplies the cooling water to the upper mold 4, the lower mold 5, and the arc electrode 8 again as cooling water.

As shown in FIGS. 2 and 3, the press die 6 has no fitting portion. More specifically, the lower surface of the upper die 4 is a smooth surface having a flat parting surface 22 and a convex curved surface 23, and the convex curved surface 23 has a radius of curvature of 5 inches or more. Note that a part of the convex curved surface 23 is also a parting surface.

The lower mold 5 has a concave curved cavity portion 7 having a radius of curvature of 5 inches to 100 inches, and overlaps a part of the parting surface 22 and a part of the convex curved surface 23 of the upper mold 4 (flat portion).
24a and a concave surface portion 24b). Also, the parting surface 24 of the lower mold 5 (the concave curved surface portion)
In the part along 24b), the gap dimension T is 0.1 mm to 3.0 mm (in the mold closed state) and the width dimension W is 4.0 mm to 2 mm.
A gap 25 of 0.0 mm is provided, so that excess molten metal during molding is released into the gap 25. In addition,
The press die 6 is not limited to this shape, and may have the shape shown in FIGS. 11 to 14, but will be described later in detail.

The method for manufacturing a molded product made of metallic glass will now be described. First, as shown in FIGS.
The metal material 26 is placed in the cavity 7 of the lower die 5 set below the upper die 4. In addition, as this metal material 26, Ln-Al-TM, Mg-Ln-TM, Zr-
Ternary alloys such as Al-TM, Zr-Al-Ni-Cu,
Zr-Ti-Al-Ni-Cu, Zr-Nb-Al-N
It can be applied to alloys composed of almost any combination of elements, including Zr-based alloys such as i-Cu, and quaternary or higher alloys. It is preferable to use the alloy in the form of powder or pellets, so that it can be easily melted.However, if rapid melting is possible, a metal material having a shape such as a wire, a band, a rod, or a lump may be used. Good.

On the other hand, the position of the arc electrode 8 in the X-axis, Y-axis and Z-axis directions is adjusted by a laser sensor 17 and a stepping motor 16 via an adapter 8a, and a metal material is used.
26 (in the Z-axis direction) is set to a predetermined value.

The interior of the chamber 10 is set to a high vacuum, for example, 5 × by using an oil diffusion vacuum pump 19 and an oil rotary vacuum pump 20.
After setting the pressure to 10 ⁻⁴ Pa (using a liquid nitrogen trap), an Ar gas is supplied from an Ar gas supply source 21 so that the inside of the chamber 10 is Ar.
Replace with gas. The upper mold 4, the lower mold 5, and the arc electrode 8 are cooled by cooling water supplied from a cooling water supply device 9.

After the above preparation is completed, FIGS.
(B) As shown in (b), the lower die moving mechanism 11 is
Is driven to move the lower mold 5 in the horizontal direction (the direction of arrow A) and stop at a position below the arc electrode 8. And
When the arc power supply 15 is turned on, a plasma arc 27 is generated between the tip of the arc electrode 8 and the metal material 26, and the metal material
26 is completely dissolved to form molten metal 28.

Thereafter, as shown in FIGS. 1 and 4 (b) and (c), the arc power supply 15 is turned off to extinguish the plasma arc 27. Then, the lower die 5 was promptly moved to a position below the upper die 4 (in the direction of arrow B), and the upper die 4 was lowered (in the direction of arrow C) by the motor 14 and the upper die moving mechanism 12 to obtain the lower die 5. The molten metal 28 having a melting point or higher is pressed by the upper mold 4 and the lower mold 5 to be deformed into a predetermined shape. Simultaneously with or after the deformation, the molten metal 28 is cooled by the cooled press die 6 at a speed higher than the critical cooling rate, whereby the molten metal 28 is rapidly solidified and the molded product 3 made of metallic glass having a predetermined shape is formed. Is produced.

As shown in FIG. 5, during molding of the molded article 3, excess molten metal flows into the void 25 (described above) provided in the lower mold 5, and is cooled and solidified. It becomes the burr part 29 of the molded product 3. In other words, the press die 6 has no fitting portion, and the gap 25 for absorbing excess molten metal is provided, so that the flow of the molten metal during pressurization by the press die 6 is reduced. There is no synergistic effect that the molded product 3 having a predetermined thickness can be reliably obtained without being stopped, thereby preventing the closing of the mold. Further, the mold 6 is not damaged by the burr portion 29, and the mold 6 can be used for a long time.

As described above, the thin plate-shaped molded product 3 made of metallic glass produced by the above-described method is obtained by deforming molten metal having a melting point or higher at a stretch into a predetermined shape and cooling it, so that it is uniformly cooled. It is a metallic glass molded product (amorphous alloy material) that is solidified, has no crystal phase due to heterogeneous solidification or heterogeneous nucleation, and has excellent strength characteristics such as high strength and high toughness without defects such as hot junctions. It can be said that there is. That is, after melting the metal material, the molten metal having the melting point or higher can be pressed and formed without joining the cooling interfaces having the melting point or lower of the molten metal.

FIG. 6 (a) shows the molded article 3 in a state where the molded article 3 is cut out from the press die 6. In the present embodiment, the molded article 3 corresponds to the case of the face body 1 of the golf club head. An example is shown. This face body 1 has an outer peripheral edge thereof.
43 has a burr portion 29, and as shown in FIG.
To finish. In addition, 1a is a convex-curved face surface.

As described with reference to FIGS. 3 and 5,
The gap dimension T of the gap 25 is set to 0.1 mm to 3.0 mm, and the width dimension W
Is set to 4.0 mm to 20.0 mm, a space capable of sufficiently absorbing the molten metal is secured, and the burr portion 29 can be easily cut. The gap size T
If it is less than 0.1 mm, the molten metal is less likely to flow into the gap 25, and if it is more than 3.0 mm, the burr 29 becomes thicker and harder to cut. On the other hand, if the width W is less than 4.0 mm, it is difficult to sufficiently absorb the molten metal, and if it exceeds 20.0 mm, the mold becomes large.

When the radius of curvature of the lower die 5 forming the face surface 1a is 5 inches to 100 inches and the radius of curvature of the upper die 4 is 5 inches or more, when used for a wood type club head, the metal mold after molding is used. Glass face body 1
Does not require post-processing for adjusting the bulge. If the radius of curvature of the lower mold 5 is less than 5 inches, post-processing such as cutting and polishing to reduce the bulge of the face body 1 is required,
If it is larger than 100 inches, post-processing to attach the bulge is required.

FIGS. 7 and 8 show a case where a hollow wood type (metal head) golf club head 2 is manufactured using the above-mentioned face body 1 made of metallic glass. More specifically, the head 2 includes a head body 30 made of titanium, a titanium alloy, stainless steel, or the like, and a fitting recess provided on the face surface 1a side of the head body 30.
It comprises a metallic glass face body 1 fitted to 31. 32 is a sole, 33 is a side part, 34 is a crown part, and 35 is a neck part. The face body 1 is a head body.
It is fitted into the fitting recess 31 of the fitting 30 and is fixed by adhesive, welding, caulking, press-fitting (at the time of fitting), or the like. Although FIG. 8 shows the case where the bottom surface of the fitting concave portion 31 is connected to the whole, it is not always necessary, and the central portion may be hollow (penetrated).

FIGS. 9 and 10 show a case where a metal iron-type golf club head 2 is manufactured by using the metal glass face body 1 described above. This head 2
Is composed of a head body 36 made of titanium, a titanium alloy, stainless steel, or the like, and a face body 1 fitted into a fitting recess 37 provided on the face surface 1a side of the head body 36. , 39 is the back face, and 40 is the neck. The face body 1 is fitted into the fitting concave portion 37 of the head main body 36 (as in the case described above), and is fixed by an adhesive, welding, caulking, press fitting (at the time of fitting), or the like. Note that FIG.
In the figure, the bottom surface of the fitting concave portion 37 is shown as being connected to the whole, but this is not always necessary, and the central portion may be hollow (penetrated).

The golf club provided with the club head 2 having the metallic glass face body 1 obtained as described above does not vary in characteristics, has excellent strength characteristics such as high strength and high toughness, and has a high yield. Well reduced manufacturing costs,
Using a metal glass face that is manufactured stably, it can maintain reproducibility stably even when the golf ball hits the face, resulting in flight distance, directionality, impact properties, strength, toughness, etc. Excellent characteristics can be exhibited.

Next, other shapes of the press die 6 will be described. In the press die 6 shown in FIG. 11, the parting surface 22 of the upper die 4 and the convex curved surface 23 are formed as a continuous smooth surface, and the parting surface 24 of the lower die 5 is formed as a concave curved surface. Things. In the press die 6 shown in FIG. 12, the entire lower surface of the upper die 4 is formed as a continuous flat surface 41, and the parting surface 24 of the lower die 5 is formed in a flat shape.

The press die 6 shown in FIG.
Is formed in a continuous flat surface 41, and the parting surface 24 of the lower mold 5 is formed in a planar shape and has a planar cavity portion 7 (having a bottom surface). In this case, in order to prevent the molten metal from flowing (spreading) before being pressed between the upper mold 4 and the lower mold 5, a flow-stop recess 44 is formed in the cavity 7 of the lower mold 5. It is preferable to provide it in a part.

Further, a gap 25 provided in the press die 6 is provided.
The shape of is other than the shape shown in FIG.
As shown in FIG. 2B, a groove-shaped void portion 25 may be used. A gap 25a is provided so that the groove-shaped gap 25 communicates with the cavity 7 when the mold is closed.

Also, as shown in FIG.
May be provided. More specifically, the cavity 7 of the lower mold 5 and the parting surface 24 are formed into a continuous concave curved surface (smooth surface), and a concave portion 42 having a lower opening is provided on the lower surface of the upper mold 4. A cavity 25 is provided at a position along the convex curved parting surface 22 of the upper mold 4.

Further, it may be formed in a shape as shown in FIG. That is, in the press die 6, the lower die 5 has a radius of curvature of 5in.
The upper mold 4 has a convex curved surface 23 having a radius of curvature of 5 inches or more, while having the cavity portion 7 having a concave curved surface of ch or more.
The convex curved surface 23 of the upper die 4 is provided with a lower opening-shaped concave portion 42 having a larger width dimension than the cavity portion 7. A cavity 25 is formed by the concave curved parting surface 24 of the lower die 5 and the outer peripheral edge of the concave portion 42 of the upper die 4.

The present invention is not limited to the above-described embodiment. For example, in a method for producing a metallic glass molded product, a metallic glass molded product 3 (face body 1) is produced at one time. The number may be one or more than one, and the predetermined shape in the present invention may be one or a plurality of continuous shapes, and may be a completely completed molded product 3. Not only the (face body 1) but also a shape leaving a simple process, for example, a finish process such as deburring may be used.

The high-energy heat source for dissolving the metal material is not particularly limited. For example, typical examples include a high-frequency heat source, an arc heat source, a plasma heat source, an electron beam, a laser beam, and the like. These heat sources are supplied to the lower die 5 of the press die 6 by one.
The number may be one or more.

[0038]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the present invention, the molded article made of metallic glass of the present invention is excellent in high strength, high toughness, high impact resistance and the like, and has a relatively large mass in the form of a bulk. It can be widely used for structural materials requiring high mechanical strength.

According to the second aspect, the bulk face body 1 excellent in high strength, high toughness, high impact resistance and the like can be obtained. In particular, the face surface 1 colliding with the golf ball
Since the golf club head provided with the face body 1 has a high strength characteristic, the golf club head can stably maintain reproducibility even in the event of a collision between the golf ball and the face. Excellent properties such as properties, impact properties, strength, and toughness can be exhibited, and uniform properties can be exhibited without variation in properties.

According to the third aspect of the present invention, a molten metal having a melting point or higher can be transformed into a predetermined shape at once, and rapidly cooled and solidified to produce a molded product made of metallic glass. To obtain a molded product (amorphous alloy material) made of metallic glass with excellent strength characteristics, such as high strength and high toughness, free of crystal phases due to non-uniform solidification and non-uniform nucleation and free from defects such as hot junctions. Can be. Further, a molded product made of metallic glass can be produced at a stretch with a simple process with good reproducibility.

Further, since the press die 6 does not have a fitting portion, excess molten metal flows into the gap between the upper die and the lower die during molding (as in the conventional case) and solidifies by cooling. This prevents the mold from being damaged or the molten metal from flowing into the damaged gaps ("galling" can be prevented) and the mold cannot be closed. Therefore, a molded product made of metallic glass having a predetermined shape and a predetermined thickness can be obtained, and the mold can be used for a long period of time.

When the metal material 26 placed in the cavity 7 of the lower mold 5 is melted by a high-energy heat source (according to claim 4 or 5), the molten metal 28 hardly flows (spreads),
Heat energy from a high energy heat source can be effectively applied to the metal material 26.

According to the fifth aspect of the present invention, it is possible to form a metallic glass molded article having a gentle curved surface or a flat surface. When the face body 1 is manufactured, post-processing such as polishing and cutting for adjusting the bulge of the face body 1 is not required.

(According to claim 6) Since the excess molten metal can be sufficiently absorbed at the time of molding by the gap 25 provided in advance in the press mold 6, the mold can be closed (without hindrance). 3.) It is smooth and a molded product made of metallic glass having a predetermined thickness can be reliably obtained. Also, the burr section
29 can be cut easily.

(According to claim 7) The face body 1 of the golf club head 2 excellent in high strength, high toughness, high impact resistance and the like can be manufactured and obtained at a stretch with simple steps with good reproducibility. .

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view of a manufacturing apparatus for manufacturing a molded product made of metallic glass of the present invention.

FIG. 2 is a sectional front view showing a press die.

FIG. 3 is an enlarged sectional view of a main part showing a press die.

FIG. 4 is an explanatory diagram showing a manufacturing process of a metallic glass molded product by a manufacturing apparatus.

FIG. 5 is an enlarged sectional view of a main part showing a closed state of a press die.

FIG. 6 is a sectional view showing a molded product made of a metallic glass of the present invention.

FIG. 7 is a front view showing a wood type golf club head.

FIG. 8 is a sectional side view showing a wood type golf club head.

FIG. 9 is a front view showing an iron type golf club head.

FIG. 10 is a sectional side view showing an iron type golf club head.

FIG. 11 is a sectional front view showing another shape of the press die.

FIG. 12 is a sectional front view showing another shape of the press die.

FIG. 13 is a sectional front view showing still another shape of the press die.

FIG. 14 is an enlarged sectional view of a main part showing another shape of the gap.

FIG. 15 is a cross-sectional front view showing a press die having a gap in the upper die.

FIG. 16 is a cross-sectional front view showing another shape of the press die having a gap in the upper die.

FIG. 17 is an operation explanatory view showing a conventional example.

FIG. 18 is an enlarged sectional view of a main part showing an incompletely closed state of the press die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Face body 2 Golf club head 4 Upper die 5 Lower die 6 Press die 7 Cavity part 22 Parting surface 23 Convex surface 24 Parting surface 25 Void part 26 Metal material 28 Molten metal 41 Plane T Gap dimension W Width dimension

────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code FI B21K 17/00 B21K 17/00 C22C 1/00 C22C 1/00 A (72) Inventor Tetsuo Yamaguchi 3 Ishizaicho, Nishinomiya City, Hyogo Prefecture -4 (72) Inventor Akihisa Inoue 35-1 Kawauchi Moto Hasekura, Aoba-ku, Sendai-shi, Miyagi Prefecture 11-806 Kawauchi Residence

Claims (7)

[Claims] 1. An upper mold 4 having no fitting portion for fitting with each other.
A metal material 26 is placed on the lower die 5 of the press die 6 composed of the lower die 5, and the metal material 26 is melted using a high-energy heat source capable of melting the metal material 26, and the obtained melting point is obtained. The above molten metal 28 is pressed by the upper mold 4 and the lower mold 5 to be deformed into a predetermined shape. Simultaneously with or after the deformation, the molten metal 28 is cooled at a critical cooling rate or higher to be formed into the predetermined shape. A molded product made of metallic glass. 2. The metallic glass molded product according to claim 1, which is produced as the face body 1 of the golf club head 2. 3. An upper mold 4 having no fitting portion for fitting with each other.
A metal material 26 is placed on the lower die 5 of the press die 6 composed of the lower die 5, and the metal material 26 is melted using a high-energy heat source capable of melting the metal material 26, and the obtained melting point is obtained. The above-mentioned molten metal 28 is pressed by the upper mold 4 and the lower mold 5 to be deformed into a predetermined shape, and simultaneously with or after the deformation, the molten metal 28 is cooled at a critical cooling rate or higher to produce the predetermined shape. A method of manufacturing a molded product made of metallic glass. 4. The method according to claim 3, wherein the lower mold 5 has the cavity 7 and the upper mold 4 has a smooth surface. 5. The lower mold 5 has a concave or flat cavity portion 7 having a curvature radius of 5 inches or more, and the upper mold 4 is a smooth surface having a convex curved surface 23 to a flat surface 41 having a curvature radius of 5 inches or more. A method for producing a metallic glass molded product according to claim 3. 6. Parting surface 2 of upper mold 4 or lower mold 5
The gap T is 0.1mm to 3.0mm along the area along 2,24.
6. The metallic glass according to claim 3, wherein a gap 25 having a width W of 4.0 mm to 20.0 mm is provided so that excess molten metal 28 during molding is released into the gap 25. Manufacturing method for molded products. 7. The method for producing a metallic glass molded product according to claim 3, wherein the molded product is produced as the face body 1 of the golf club head 2.