JP2002264184A - Apparatus for molding cylinder having notched grooves - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for molding a cylinder having notched grooves making it easy to draw out a molded cylinder from a mold by making the outer peripheral surfaces of twelve divided male mold units narrow and by shortening the projected parts for forming the notched grooves of the cylinder, making the draft angle of the projected parts acute to set the upper and lower edge parts of the notched grooves of the molded cylinder to an angle near to a right angle and smoothly performing the advance and retreat of the cylinder. SOLUTION: A male mold 1 forming a molding gap 10 with respect to a female mold 7 is divided into twelve parts of form male mold units 1A and 1B of two shapes and the inner surfaces of the molding parts 1f of the male mold units 1B are set to taper surfaces 1g and bosses 2 are arranged in these male mold units 1A and 1B and projected parts 1a and 1b, of which the upper and lower edge parts are formed into inclined surfaces 1m having an acute angle, are provided to the outer peripheral surfaces of the molding parts 1e and 1f of the male mold units 1A and 1B and one male mold units 1A are formed into a fan shape on a plan view and the outer peripheral surfaces of the other male mold units 1B are formed into an almost arcuate hexagonal shape and these male mold units 1A and 1B are alternately arranged in a peripheral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a cylinder having a cutout groove such as a zoom for autofocus of a camera for adjusting the distance of a lens of the camera.

[0002]

2. Description of the Related Art FIGS. 14 to 18 show a conventional molding apparatus of this type, for example. This is shown in FIG.
And a cylinder such as an auto-focusing zoom Z of the camera shown in Fig. 1, wherein the cylinder such as the auto-focusing zoom Z has three notched grooves Z2, Z3, Z4 on the peripheral wall of a cylindrical main body Z1. Are formed at the time of molding.

The conventional molding apparatus 100 is configured such that an upper mold 114 and a lower mold 115 can be brought into contact with and separated from each other, and a male mold 101 and a female mold 106 for forming a molding space in the lower mold 115 are provided. Yes, the male mold 101 is shown in FIG. 14 and FIG.
As shown in the figure, the male
01A and 101B are substantially L-shaped when viewed from the side and have two types of shapes, and one male mold 101A has a molded part 101b that stands vertically upward from a horizontally oriented base 101a. The portion 101b has a sector shape in a plan view, and the arm portion 1 protrudes inward toward the center from this sector portion.
01c is integrally extended. Further, the other male unit 101B is separated from the horizontal base 101d by the molding unit 101B.
e is erected vertically upward, and the molded portion 101
e has a substantially hexagonal shape in plan view with an arcuate outer surface, and the arm portion 10 protrudes from the substantially hexagonal portion toward the center.
1 g is extended.

[0004] The male single body 1 having these two shapes is used.
01A and 101B are alternately combined three by three, and the outer peripheral surface has a circular shape in plan view. On its outer peripheral surface, three notched grooves Z2 on the peripheral wall of the cylindrical main body Z1,
Protrusions 101z for forming Z3 and Z4 are protruded, respectively. The protruding ridge 101z is provided for each male unit 1
Projections are individually provided so as to be continuous with the outer peripheral surfaces of 01A and 101B.

FIG. 16 shows each male unit 101A,
This shows a molding apparatus 100 in which 101B is incorporated in a central portion, and a plurality of support columns 103 are erected outside a center portion of a disk-shaped base 102 by a predetermined distance, and the inner surface of the support column 103 is upward. It is formed on the tapered surface 103a so that the side becomes narrower. A disk-shaped mounting board 104 is arranged inside these support columns 103, and a guide board 105 shown in FIG.
Is arranged. This guide board 105 has a central hole 1
Mold guide groove 1 radially outward from 6a toward 6 directions
05b is formed.

The bases 101a, 101 of the above-mentioned male main bodies 101A, 101B are inserted into these die guide grooves 105b.
d are slidably inserted alternately. On the upper surface side of the male mold bodies 101A and 101B, a disk-shaped mold mounting board 107 for mounting the female mold 106 combined in a disk shape is arranged. The female mold 106 has a through hole 106a in the vertical direction near the outer edge thereof, which is inclined outward.
The upper portion of the through hole 106a has an upper mold 11
4 is inserted through the pin 116. further,
A spring 117 for urging the female mold 106 outward is provided inside the female mold 106. Further, a boss 108 having a tapered surface 108a whose outer peripheral surface is narrower is provided upright on the base 102 at the center side of each of the male single bodies 101A and 101B.

Further, the inner peripheral surface of the female mold 106 and the above-mentioned molded portions of the male molds 101A and 101B are located, and a molding gap 110 is provided between the female mold 106 and the male molds 101A and 101B. Have been. Furthermore, these female molds 106
A disc-shaped cover plate 111 having a resin injection path 111a communicating with the molding gap 110 is mounted on the upper die 114 mounted on the upper portions of the male molds 101A and 101B.

An upper holding plate 112 having a resin injection passage 112a communicating with the resin injection passage 111a is arranged on the upper surface side of the lid plate 111. The upper holding plate 112 communicates with the resin injection passage 112a above the upper holding plate 112. Resin injection hole 113a
Is disposed. Then, in a state where the molding apparatus 100 is assembled and set, the molten resin is press-fitted from the resin injection hole 113a and each resin injection path 11
When the molding gap 110 is filled with resin through 2a and 111a, a cylinder Z having notched grooves Z2, Z3 and Z4 shown in FIG. 13 is formed between the female mold 106 and the male mold 101.

That is, the cylindrical main body Z1 is formed at the vicinity 110 of the molding of the female mold 106 and the male mold 101, and the notch grooves Z2, Z3, Z4 is formed. After the molding, as shown in FIG.
By separating the molds 5 from each other, the female mold 106 is opened, the male mold 101 is gathered at the center, and a molded product such as the auto-focusing zoom Z is taken out to complete the molding.

However, in the above-mentioned conventional molding apparatus,
The male mold 101 is divided into six parts, and two types of male single bodies 101A are provided.
Since only the male mold 101B is formed, the molded portions 101b and 101e of these male single bodies 101A and 101B are formed.
Since the width of the outer peripheral surface is large and the protruding portion 101z is long, there is a problem that it is difficult to remove a cylinder such as an autofocus zoom Z which is a molded product from the mold even if the male mold 101 is concentrated at the center, As shown in FIG. 15B, in order to facilitate the extraction, the extraction angle θ1 of the projection 101z must be increased.

However, in this way, when the molded article is assembled to a camera or the like, and the zoom Z is moved forward and backward to adjust the distance, the angle of the inner edge surface of the upper and lower edges is wide and oblique. When the forward / backward moving pin moves to Z2, Z3, Z4, the pin moves at this time to the notch groove Z2,
There was a problem that the upper and lower edges of Z3 and Z4 could be caught or the pins could easily come off the notch groove, and the cylinder Z having the notch groove could not be smoothly moved forward and backward.

[0012]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and divides a male die into at least 12 parts, narrows the outer peripheral surface of each male die alone, and cuts a cylindrical notch such as a camera zoom. The length of the ridge for forming the groove can be shortened, so that a cylinder such as a zoom for autofocus, which is a molded product, can be easily extracted from the mold, and the angle for extracting the projection is reduced. The upper and lower edges of the notched groove of the cylinder such as an autofocus zoom formed at the time of molding can be formed at an angle close to a right angle, so that the cylinder can smoothly move forward and backward. An object of the present invention is to provide a cylindrical molding device having a notched groove that can be performed.

[0013]

Means for Solving the Problems The present invention has been proposed to solve the above-mentioned problems, and the invention according to claim 1 comprises a female mold and a plurality of divided female molds. A male die arranged so that a molding gap is provided between the male die and a male die constituting the male die. A boss is provided, and on the outer peripheral surface of each of the male molds, a notch groove is formed, and a ridge portion formed on an inclined surface having a steep angle close to a right angle at the upper and lower edges is continuously formed. Provided, the male mold is divided into at least 12 parts, and the ridge portion is provided continuously on the outer peripheral surface of the molded portion of each male mold, and each male mold is formed in two types of shapes, One male unit is formed in a fan shape in a plan view, and the other male unit is formed in a substantially hexagonal shape with an arc-shaped outer peripheral surface. The two types of male molds are arranged alternately in the circumferential direction, are formed into a substantially L-shape in side view, and a molded portion extends vertically upward from a lower base portion. The inner surface of the molded portion of the male element having a substantially hexagonal shape in plan view, which is in contact with the male member, is formed as an upwardly tapered surface.

According to a second aspect of the present invention, the two types of male molds, which are alternately arranged in the circumferential direction, can be moved further inward than at the time of molding when the molding is completed, so that a cylindrical product as a molded product can be formed. It is characterized in that the cutout groove is positioned outside the ridge on the outer peripheral surface of each of the male molds.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cylindrical molding device having a notched groove according to an embodiment of the present invention. FIG. 1 is a perspective view showing a cylinder such as a zoom for autofocus of a camera formed by a cylindrical molding device having a notched groove according to an embodiment of the present invention. FIG. 2 is a perspective view showing a cylindrical molding device having a notched groove according to the present embodiment. FIG. 3 is a schematic perspective view of a male mold, FIG. 3 is a longitudinal sectional view showing the entire structure of a cylindrical molding device having a notched groove of the present embodiment, and a sectional line (oblique line) is shown only in a main part;
FIG. 4 is a partial cross-sectional view showing a state in which a molded product is taken out of the cylindrical molding device having a notched groove according to the present embodiment. FIG. 5 is a diagram showing a male unit and a guide plate in the cylindrical molding device having a notched groove according to the present embodiment. FIG. 6 is a plan view showing one of the male dies alone in the cylindrical molding device having a notched groove according to the present embodiment, and FIG. 7 is the other male die in the cylindrical molding device having a notched groove according to the present embodiment. FIG. 8 is a plan view showing a single unit, and FIG. 8 is a plan view showing a positional relationship between one male mold and the other male mold in the cylindrical molding device having a notched groove according to the present embodiment.
(A), (b), (c) and (d) are side and plan views of one male mold and the other male mold in the cylindrical molding device having a notched groove of the present embodiment, and FIG. FIG. 11 is a plan view showing the position of the male mold in the cylindrical molding device having a groove at the time of molding, and FIG. 11 is a plan view showing the position of removing the molded product after the molding is completed in the cylindrical molding device having the notched groove of the present embodiment. FIG. 12A is a horizontal cross-sectional view of a main part showing a state of molding by a male mold and a female mold in the cylindrical molding device having a notched groove of the present embodiment, and FIG. FIG. 4 is an enlarged vertical sectional view showing a male ridge in a cylindrical molding device having a groove.

As shown in FIG. 1, a cylindrical body formed by the cylindrical forming apparatus having a notched groove according to the present embodiment is a cylindrical body such as an auto-focus zoom Z of a camera, and has a cylindrical main body Z1. Three notched grooves Z2, Z3, Z4 in the peripheral wall of
Are formed at the time of molding. As shown in FIG. 2, the male mold of the cylindrical molding apparatus having a notched groove according to the present embodiment for molding the cylindrical body Z is divided into 12 parts, and each of the male molds 1A and 1B has two types. One male unit 1A is formed in a fan shape in a plan view, and the other male unit 1B
The outer peripheral surface is formed in a substantially hexagonal arc shape, and these two types of male single bodies 1A and 1B are alternately arranged in the circumferential direction. As shown in FIG. 7 to FIG. 11, a portion near the upper end of the other male mold 1B is formed so as to be constricted in a substantially V-shape from both left and right sides toward the inside. That is, the double-sided flat portions connected to the arc-shaped portion of the substantially hexagonal male single unit 1B alternately abut on the substantially flat side portion of the V-shape in plan view of one male unit 1A having a fan shape in plan view. The outer peripheral surface is circular when viewed from above.

Then, in order to form notched grooves Z2, Z3, Z4 of the cylinder Z on the outer peripheral surface of each male unit 1A, 1B,
Protrusions 1a and 1b are formed continuously on the inclined surfaces having a steep angle near the right and upper edges, respectively.
Further, each of the male molds 1A, 1B is formed in a substantially L-shape in side view, and molded portions 1e, 1f extend vertically upward from lower bases 1c, 1d.
Forming part 1 of male unit 1B having a substantially hexagonal shape in a plan view and abutting on
The inner surface of f is formed as an upper tapered surface 1g.
Further, the lower bases 1c and 1d are each formed with a notch recess 1h having a U-shape in a side view at substantially the center of the bottom surface in the longitudinal direction. In addition, the outwardly facing steps 1 are formed at the lower ends of the moldings 1d and 1e.
i, 1j are formed, and the outwardly facing steps 1i, 1j
Slopes 1k, 1 extending downward from the base toward the bases 1c, 1d.
m is formed.

The cylindrical forming apparatus having a notch groove according to the present embodiment shown in FIG. 3 includes an upper die 16A and a lower die 15A which can be separated from each other, and an upper base 20 disposed on the upper die 16A. , And a lower base 3 arranged below the lower mold 15A, and these members are integrated so as to be separable at respective boundary surfaces. In FIG. 3, hatching is applied only to the vicinity of the center to make the figure easier to see. A plurality of support columns 4 are provided upright on the disc-shaped lower base 3 outward from the center by a predetermined distance, and the inner surface of the support column 4 is formed in a tapered surface 4a so that the upper side becomes narrower. . A disk-shaped mounting board 5 is arranged inside these support columns 4, and a guide board 6 shown in FIG. 5 is arranged on the upper surface of the mounting board 5. In this guide panel 6,
A die guide groove 6b is formed radially outward from the center hole 6a toward the twelve directions, and its outer peripheral surface is formed as a tapered surface whose diameter increases downward.

The bases 1c and 1d of the above-described male main bodies 1A and 1B and the bases 1c and 1c are inserted into these die guide grooves 6b.
Sliding bodies 9 in which projections 9a at the center of the upper surface are fitted alternately so as to be slidable in notch recesses 1h of 1c, and the outer peripheral surface of the sliding body 9 is continuous with the outer peripheral tapered surface of the guide plate 6. It is formed on a tapered surface whose diameter increases downward. On the upper surface side of the male die bodies 1A and 1B, a disk-shaped die mounting plate 8 for mounting the female die 7 that is divided and assembled in a disk shape is disposed. Further, a boss 2 having an outer peripheral surface formed on a tapered surface 2a whose upper surface is narrower is provided upright on the lower base 3 at the center of each of the male molds 1A and 1B.

Further, the inner peripheral surface of the female mold 7 and the above-mentioned molded portions of the male molds 1A and 1B are located, and a molding gap 10 is provided between the female mold 7 and the male molds 1A and 1B. Have been. The female mold 7 has a vertical through-hole 7a inclined outwardly in the vicinity of the outer edge thereof.
A pin 21 having an upper portion fixed to the upper die 16A is inserted through the upper portion. Further, a spring 22 for urging the female mold 7 outward is provided inside the female mold 7. Further, the female mold 7 and the upper mold 16A placed above the male molds 1A and 1B are provided with a resin injection path 1 communicating with the molding gap 10.
A disk-shaped lid 11 having 1a is placed.

A resin injection path 1 is provided on the upper surface side of the lid plate 11.
An upper holding plate 12 made of a disc having a resin injection passage 12a communicating with the resin injection passage 1a is arranged. Above the upper holding plate 12, a nozzle portion 13 having a resin injection hole 13a communicating with the resin injection passage 12a is arranged. ing. Then, with the molding device assembled and set, the resin injection hole 13a
When the molding resin is filled into the molding gap 10 through the respective resin injection paths 12a and 11a by press-fitting the molten resin, the notched grooves Z2, Z3 and Z4 shown in FIG. Is formed. That is, the cylindrical main body Z1 of the cylinder Z is formed at the vicinity of the molding die 10 of the female die 7 and the male die 1, and the notch grooves Z2, Z3 and Z4 are formed.

After the cylinder Z is formed, as shown in FIG. 11, the two types of male molds 1A and 1B are moved inward (center side) to form the cutout Z2 of the cylinder Z as a molded product. , Z
The cylindrical body Z is taken out by positioning 3, Z4 outside the ridges 1a, 1b of each of the male single bodies 1A, 1B.

Here, the method of removing the cylinder will be described in more detail with reference to FIG. When the molding of the cylinder Z is completed, as shown in FIG.
A, the upper base 20 and the lower base 3 are separated from each other. When the upper die 16A and the upper base 20 are separated, the pins 21
Is removed from the through hole 7a and the upper mold 16A is
Is urged outward. Therefore, upper die 1
6A moves outward and separates from a cylindrical body (not shown) which is a molded product. Further, when the lower mold 15A and the lower base 3 are separated from each other, the boss 2 formed on the tapered surface 2a whose upper surface is narrowed down together with the lower base 3 so that the lower mold 15A and the lower mold 3 are separated from each other. At the same time, a supporting column 4 formed on the tapered surface 4a descends together with the lower base 3 so that the inner surface becomes narrower on the upper side, so that the outer peripheral surfaces of the guide plate 6 and the slide body 9 are tapered. The male body 1A, 1B is moved inward (center side) by the surface 4a to be pressed inward by the surface 4a, and a gap is generated between the male body 1A and the cylindrical body. By the above operation, the cylinder is separated from the mold on both the inside and the outside, so that the cylinder can be taken out.

At this time, as shown in FIG. 12B, each of the male molds 1A forming the notched grooves Z2, Z3, Z4 of the cylinder Z,
Since the upper and lower edges of the ridges 1a and 1b of 1B are formed on an inclined surface having a steep angle θ close to a right angle, the notch groove Z is formed.
The upper and lower inner edge surfaces of 2, Z3 and Z4 are formed as steep surfaces having a steep angle close to a right angle. Therefore, when assembling this cylinder Z to a camera or the like and moving the cylinder made of the zoom Z forward and backward to adjust the perspective, the oblique grooves Z2, Z3, and the oblique grooves with the inner edges of the upper and lower edges being wide in angle. When the forward / backward movement pin moves to Z4, the pin moves to the notch groove Z2,
The cylinder Z can be smoothly moved forward and backward without being caught or disengaged from the upper and lower edges of Z3 and Z4. The male mold 1 is divided into 12 parts, and each male mold 1
A, 1B, the outer peripheral surfaces are narrowed, and the notched grooves Z2, Z of the cylinder Z are formed.
3, the length of the ridges 1a and 1b for forming Z4 can be reduced, and the cylinder Z as a molded product can be easily removed from the male mold 1.

In the above embodiment, the zoom Z for auto-focusing of the camera has been described as an example of the cylinder Z. However, the present invention is not limited to this, and it is needless to say that the present invention can be applied to other types of cylinders having notched grooves.

[0026]

As described above, the first aspect of the present invention relates to a female mold and a male mold divided into a plurality of parts and provided with a molding gap between the female mold and the female mold. A boss is provided at the center of the male unit constituting the male unit to hold these male units in a state at the time of molding, and is provided on the outer peripheral surface of each male unit. The ridges forming the notch grooves, the ridges formed on the inclined surface having a steep angle close to a right angle with the upper and lower edges are respectively provided continuously, and the male mold is divided into at least 12 parts, and the ridges are formed. Are continuously provided on the outer peripheral surface of the molding portion of each male unit, and each male unit is formed in two types of shapes, one male unit is formed in a fan shape in plan view, and the other male unit is formed. The outer surface of the single unit is formed in an approximately hexagonal arc shape, and these two types of male units are alternately arranged in the circumferential direction. The molded portion is formed in a substantially L-shape when viewed from the side, and a molded portion extends vertically upward from the lower base portion, and is formed into a substantially hexagonal male unit alone in a plan view and abuts against the boss. Since the inner surface is formed as an upwardly tapered surface, the following effects are obtained.

That is, the male mold is divided into at least 12 parts, which is at least twice as large as the conventional six divisions, and the outer peripheral surface of each male mold is narrowed to form a cutout groove of a cylinder such as a zoom for automatic focusing of a camera. Can be shortened, so that the cylinder as a molded product can be easily removed from the mold. Furthermore, since the angle of the upper and lower edges of the cylindrical ridge is formed on an inclined surface having a steep angle close to a right angle, the upper and lower edges of the cutout groove of the cylinder formed by this ridge are formed at an acute angle close to a right angle. Since the pin can be formed and the pin inserted into the notch groove does not get caught or disengaged from the notch groove, the cylinder can be smoothly moved forward and backward.

According to a second aspect of the present invention, the two types of male molds, which are alternately arranged in the circumferential direction, can be moved further inward than at the time of molding when the molding is completed, so that the notch of the cylinder as a molded product is formed. Since the groove is located outside the protrusion on the outer peripheral surface of each male unit, the protrusion moves inward (center side) from the cutout groove of the cylinder formed at the time of molding with this protrusion. As a result, the cylinder can be easily removed from the male mold, and the working efficiency can be improved. This does not occur, and the quality of the molded cylinder can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cylinder having an autofocus zoom of a camera formed by a cylindrical forming apparatus having a notched groove according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a male mold of a cylindrical molding device having a notched groove according to the present embodiment.

FIG. 3 is a longitudinal sectional view showing an entire structure of a cylindrical forming apparatus having a notched groove according to the present embodiment, in which a sectional line (oblique line) is shown only in a main part.

FIG. 4 is a partial cross-sectional view showing a state in which a molded product is taken out in a cylindrical molding device having a notched groove according to the present embodiment.

FIG. 5 is a perspective view showing a single male die and a guide plate in the cylindrical molding device having a notched groove according to the present embodiment.

FIG. 6 is a plan view showing one of the male molds alone in the cylindrical molding device having notched grooves according to the present embodiment.

FIG. 7 is a plan view showing the other male unit alone in the cylindrical molding device having a notched groove according to the present embodiment.

FIG. 8 is a plan view showing a positional relationship between one male die and the other male die in the cylindrical molding device having a notched groove according to the present embodiment.

9 (a), (b), (c) and (d) are a side view and a plan view of one male mold and the other male mold in the cylindrical molding device having a notched groove of the present embodiment.

FIG. 10 is a plan view showing the position of the male mold in the cylindrical molding device having a notched groove according to the present embodiment at the time of molding.

FIG. 11 is a plan view showing a position at which a molded product after the completion of molding of the male mold in the cylindrical molding device having a notched groove of the present embodiment is taken out.

FIG. 12A is a horizontal cross-sectional view of a main part showing a state in which a male mold and a female mold are used in a cylindrical molding apparatus having a notched groove according to the present embodiment, and FIG. FIG. 4 is an enlarged vertical sectional view showing a male ridge in a cylindrical molding device having a groove.

FIG. 13 is a perspective view showing a cylinder having an auto-focus zoom of a camera molded by a cylinder molding apparatus having a notched groove according to a conventional embodiment.

FIG. 14 is a schematic perspective view of a male mold of a conventional cylindrical molding device having a notched groove.

FIG. 15A is a partial horizontal sectional view showing a state in which a conventional mold for forming a cylinder having a notched groove is formed by a male mold and a female mold in a cylinder forming apparatus having a notched groove, and FIG. FIG. 3 is an enlarged vertical sectional view showing a male ridge in the device.

FIG. 16 is a longitudinal sectional view showing the entire structure of a conventional cylindrical molding device having a notched groove, and partially showing a sectional line (oblique line).

FIG. 17 is a partial cross-sectional view showing a state in which a molded product is taken out in a conventional cylindrical molding device having a notched groove.

FIG. 18 is a perspective view showing a single male die and a guide plate in a conventional cylindrical molding device having a notched groove.

[Explanation of symbols]

 Z Autofocus zoom (cylindrical) Z2 Notch groove Z3 Notch groove Z4 Notch groove 1 Male 1A Male single 1B Male single 1a Projection 1b Projection 1c Base 1d Base 1e Mold 1f Mold 1g Boss 7 Female mold 10 Molding gap

[Procedure amendment]

[Submission date] July 26, 2001 (2001.7.2)
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

[0013]

DISCLOSURE OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and the invention according to claim 1 comprises an upper mold, a lower mold, and an upper mold which can be separated from each other. Top of
And the lower base located at the bottom of the lower mold
With a base, male and female molds are placed on the upper part of the lower mold.
The male mold is divided into a plurality and a molding gap is formed between the male mold and the female mold.
The male unit that is arranged so as to be
In the center of the body, the outer peripheral surface is formed as an upwardly tapered surface
To hold these male molds in their original condition.
The male die is provided on a lower base, and a projection is formed continuously on the outer peripheral surface of each male die. The ridges are provided continuously on the outer peripheral surface of the molded portion of each male unit, and each male unit is formed in two types of shapes, one male unit is formed in a fan shape in plan view, and the other The male unit has an outer peripheral surface formed in a substantially hexagonal arc shape, and these two types of male units are arranged alternately in the circumferential direction, are formed in a substantially L-shape in side view, and are formed from a lower base. have been upward vertically shaped portion extends, and the inner surface of the forming portion of the male alone of the plan view hexagonal shape which abuts is formed on the tapered surface of the narrowing upper to the boss, the female is Near its outer edge
It has a vertical through-hole that slopes outward.
The pin whose upper part is fixed to the upper die is inserted into this through hole.
The inside of the female mold has a bag that urges the female mold outward.
It is characterized by having been installed .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026]

As described above, the first aspect of the present invention provides an upper mold and a lower mold that can be separated from each other, and an upper mold and an upper mold.
The upper base placed and the lower base placed below the lower mold
With a board, a male mold and a female mold are arranged on the upper part of the lower mold,
The male mold is divided into a plurality and a molding gap is provided between the male mold and the female mold.
Are arranged in such a way that the male
In the center, the outer peripheral surface is formed as an upper tapered surface.
A boss for holding these male molds in their original condition
The male die unit is erected on a lower base, and the male die unit is provided on the outer peripheral surface thereof with a ridge portion forming a cutout groove, and the male die is divided into at least 12 parts. Are continuously provided on the outer peripheral surface of the molding portion of each male unit, and each male unit is formed in two types of shapes, one male unit is formed in a fan shape in a plan view, and the other male unit is formed. The single body has an outer peripheral surface formed in a substantially hexagonal shape with an arc shape. These two types of male single bodies are alternately arranged in the circumferential direction, are formed in a substantially L-shape in side view, and face upward from the lower base. It has extended vertical shaped portion, the boss and the inner surface of the forming portion of the male alone of the plan view hexagonal shape which abuts is formed on the tapered surface of the thinned top to the female its outer edge Outside near the part
It has a vertical through hole inclined toward the direction,
A pin whose upper part is fixed to the upper die is inserted into this through hole.
Inside the female mold, a spring that urges the female mold outward.
Are provided , the following effects can be obtained.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Deleted ───────────────────────────────────────────── ────────

[Procedure amendment]

[Submission date] October 26, 2001 (2001.10.
26)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

[0013]

DISCLOSURE OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and the invention according to claim 1 comprises an upper mold, a lower mold, and an upper mold which can be separated from each other. An upper base arranged on the upper part of the lower mold and a lower base arranged on the lower part of the lower mold, a male mold and a female mold are arranged on the upper part of the lower mold, and the male mold is divided into a plurality of female molds. Is arranged so that a molding gap is provided between the male die and the male die constituting the male die. A boss is provided on the lower base to hold the boss in a state, and a cutout groove is formed on the outer peripheral surface of each of the male molds.
Protrusions formed on a steep surface having a steep angle are respectively provided continuously, the male mold is divided into at least 12 parts, and the protrusions are provided continuously on the outer peripheral surface of the molded portion of each male mold alone. Together, each of the male molds is formed into two different shapes,
One male unit has a fan shape in plan view, the other male unit has an outer peripheral surface formed in a substantially hexagonal shape with an arc shape, and these two types of male units have a male shape in the one plan view. Simple
The other approximately hexagonal shape is formed on the substantially flat surface of the V-shaped side surface of the body.
The double open flat part connected to the arc-shaped part of the male unit comes in contact
As described above, they are alternately arranged in the circumferential direction, are formed in a substantially L-shape when viewed from the side, and have a molded portion extending vertically upward from the lower base and contacting the boss in the approximately hexagonal shape in plan view. Only the inner surface of the molded part of the male unit of the shape is formed as an upper tapered surface, and the female die has a through hole in the vertical direction inclined outward in the vicinity of the outer edge thereof, A pin having an upper part fixed to the upper die is inserted into the through hole, and a spring for urging the female die outward is provided inside the female die.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026]

As described above, according to the first aspect of the present invention, an upper mold and a lower mold that can be separated from each other, an upper base arranged on an upper part of the upper mold, and a lower part of the lower mold are arranged. Male base and female base are arranged on the upper part of the lower die,
The male mold is divided into a plurality of parts and arranged so that a molding gap is provided between the male mold and the female mold. A boss for holding these male dies alone in a state at the time of molding is erected on the lower base, and a cutout groove is formed on the outer peripheral surface of each of the male dies , and the angles of the upper and lower edges are formed. Steep near a right angle
Protrusions formed on the inclined surface of the angle are respectively provided continuously, and the male mold is divided into at least 12 parts, and the protrusions are continuously provided on the outer peripheral surface of the molding portion of each male mold alone, Each of the male molds is formed into two types of shapes, one male mold is formed in a sector shape in a plan view, and the other male mold is formed in a substantially hexagonal shape having an outer peripheral surface in an arc shape. The two types of male single bodies are the male single bodies in the fan shape in plan view.
The other approximately hexagonal male type is formed on the substantially flat side portion of the V-shaped side view in plan view.
Make sure that the two-sided flat part connected to the single arc-shaped part abuts
A substantially hexagonal shape in a plan view, which is alternately arranged in the circumferential direction and is formed in a substantially L-shape in a side view, and a molding portion extends vertically upward from a lower base portion and abuts on the boss. Only the inner surface of the molded portion of the male mold unit is formed as an upwardly tapered surface, and the female mold has a through hole in the vertical direction in the vicinity of the outer edge thereof, which is inclined outward. A pin having an upper portion fixed to the upper die is inserted into the through hole, and a spring for urging the female die outward is provided inside the female die, so that the following effects are obtained. ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 7, 2002 (2002.2.7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

[0013]

DISCLOSURE OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and the invention according to claim 1 comprises an upper mold, a lower mold, and an upper mold which can be separated from each other. An upper base arranged on the upper part of the lower mold and a lower base arranged on the lower part of the lower mold, a male mold and a female mold are arranged on the upper part of the lower mold, and the male mold is divided into a plurality of female molds. Is arranged so that a molding gap is provided between the male die and the male die constituting the male die. A boss for holding in a state is provided on the lower base, and a cutout groove is formed on the outer peripheral surface of each of the male molds. The formed ridges are respectively provided continuously, and the male mold is divided into at least 12 parts, and the ridges are separated from each male mold by itself. Together provided continuously to the outer circumferential surface of the shaped part, wherein each male alone, formed in two kinds of shapes,
One male unit has a fan shape in plan view, the other male unit has an outer peripheral surface formed in a substantially hexagonal shape with an arc shape, and these two types of male units have a male shape in the one plan view. The double-sided flat portions connected to the arc-shaped portion of the other substantially hexagonal male single piece are alternately arranged in the circumferential direction so as to abut on the substantially flat side portion of the V-shape of the single die in plan view. A molded part is formed in an L shape, and a molded part extends vertically upward from a lower base part, and is a molded part of a male unit having a substantially hexagonal shape in plan view.
Taper so that only the inner surface of the boss contacts the boss
Surface, the female mold has a through hole in the vertical direction in the vicinity of the outer edge portion thereof, which is inclined outward.
A pin having an upper part fixed to the upper die is inserted into the through hole, and a spring for urging the female die outward is provided inside the female die.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

[0026]

As described above, according to the first aspect of the present invention, an upper mold and a lower mold that can be separated from each other, an upper base arranged on an upper part of the upper mold, and a lower part of the lower mold are arranged. Male base and female base are arranged on the upper part of the lower die,
The male mold is divided into a plurality of parts and arranged so that a molding gap is provided between the male mold and the female mold. A boss for holding these male dies alone in a state at the time of molding is erected on the lower base, and a cutout groove is formed on the outer peripheral surface of each of the male dies, and the angles of the upper and lower edges are formed. Are formed on the inclined surface at a steep angle close to a right angle, respectively, are provided continuously, and the male mold is divided into at least 12 parts, and the protrusion is continuously formed on the outer peripheral surface of the forming part of each male unit. Each of the male molds is formed in two types of shapes, one male mold is formed in a sector shape in a plan view, and the other male mold is formed in a substantially hexagonal shape having an outer peripheral surface in an arc shape. These two types of male units are the V-shaped side in plan view of the one male unit in plan view. The two open flat portions connected to the arc-shaped portion of the other substantially hexagonal male unit are alternately arranged in the circumferential direction so as to abut on the substantially flat portion, and are formed in a substantially L-shape in a side view. A molded part extends vertically upward from the base, and is formed of a male part having a substantially hexagonal shape in plan view.
A tapered surface that is thinner so that only the surface contacts the boss
The female die has a vertical through hole near its outer edge that is inclined outwardly, and a pin whose upper part is fixed to the upper die is inserted into this through hole. Since a spring for urging the female die outward is provided inside the female die, the following effects are obtained.

Claims (2)

[Claims] 1. A female die, a male die divided into a plurality of portions and provided with a molding gap between the female die, and a male die constituting the male die. And a boss for holding these male dies alone in a molding state, and forming a cutout groove on the outer peripheral surface of each of the male dies, making the angles of the upper and lower edges perpendicular to each other. Protrusions formed on the inclined surface at a steep angle close to are respectively provided continuously, the male mold is divided into at least 12 parts, and the protrusions are continuously formed on the outer peripheral surface of the molding portion of each male mold alone. At the same time, each male unit is formed in two types of shapes, one male unit is formed in a sector shape in plan view, and the other male unit is formed in a substantially hexagonal shape with an outer peripheral surface in an arc shape. The two types of male molds are alternately arranged in the circumferential direction, are formed into a substantially L-shape in side view, and have a lower base portion. The molded portion extends vertically upward from above, and the inner surface of the molded portion of the male unit having a substantially hexagonal shape in a plan view, which is in contact with the boss, is formed as a tapered surface with an upper taper. Forming apparatus having a notched groove. 2. Upon completion of molding, each of the two types of male molds, which are alternately arranged in the circumferential direction, can be moved further inward than at the time of molding, so that a cutout groove of a cylinder as a molded product is inserted into each of the male molds. The cylindrical molding device having a notched groove according to claim 1, wherein the cylindrical member is positioned outside the protrusion on the outer peripheral surface of the single body.