JPH09183127A - Locating ring of forming mold and forming mold equipped therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locating ring which can be manufactured simply at a low cost and facilitate handling and management of a mold. SOLUTION: This locating ring 1 has a doughnut-like shape and comprises an outside wall face 3, an inside wall face 4, and a rib 5. As a material for forming the locating ring 1, a thermoplastic resin of a polyamide or a thermosetting resin is used, and the material itself can be easily colored. By forming the locating ring 1 out of the resin material, it can be worked simply, the cost of it can be reduced, and it can be light in weight when it is completed comparing with a conventional locating ring formed of a metal material. In addition, by changing the color of the locating ring 1, it can be used for management of a forming mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die used for resin molding or die cast molding,
In particular, the present invention relates to a locate ring mounted on a molding die and used for positioning when mounting the molding die on a holder of a molding machine, and a molding die having the locate ring mounted thereon.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a molding die which has been conventionally used, and is a view showing a molding die for injection molding. The molding die B has a fixed side mounting plate 10 mounted on a stationary side holder of the molding machine and a movable side mounting plate 11 mounted on a movable side holder of the molding machine. A fixed mold plate 12 having a female cavity 12a is mounted on the fixed mount plate 10, and a movable core plate 13a is formed on the movable mount plate 11.
The movable side mold plate 13 provided with is attached via a receiving plate 14 and a spacer block 15.

The molding die B is constructed so that it can be divided at the boundary between the fixed mold plate 12 and the movable mold plate 13 in accordance with the movement of the holder of the molding machine. Further, a nozzle of a molding machine abuts on the fixed side mounting plate 10 and serves as a sprue 16 for injecting a molten resin into the molding die B and a positioning means for mounting the molding die on the molding machine. A locate ring 17 is attached. Further, the fixed side mold plate 12 and the movable side mold plate 13 have guide bushes 1 respectively.
9 and a guide post 18 are provided, and when the fixed side mold plate 12 and the movable side mold plate 13 are closed by this guide device, the cavity 12a and the core 1 are
Positioning is performed so that 3a is located at an accurate position.

Reference numeral 21 denotes an ejector plate, which is a return pin 22 for returning the ejector plate 21 to a predetermined position when the molding die B is closed, and a movable side mold plate for sprue when the mold is opened. 13, a sprue lock pin 23 for drawing the molded product, and an ejector pin 24 for ejecting a molded product from the movable mold plate 13 as the mold opening progresses.
have. Then, with the molding die B closed,
The molten resin is injected into the space formed by the cavity 12a and the core 13a, and after cooling, the mold is opened and taken out to form a molded product of a desired shape.

Next, the locate ring 17 will be described with reference to FIG. In FIG. 4, (a) shows a locate ring 17.
FIG. 3B is a plan view of the same, FIG.
6 is a cross-sectional view taken along line CC of FIG. Locate ring 17
Is substantially doughnut-shaped, and has a pair of counterbore holes 17a formed at positions facing the central axis. This counterbore 1
It is attached to the fixed side attachment plate 10 of the molding die B shown in FIG. 3 by utilizing 7a. Further, the locate ring 17 is made of a metal material such as carbon steel for machine structure, and its processing is performed by cutting a cylindrical tube into a circle with a lathe or the like.
After finishing the end face by chamfering, etc., it is finished by machining a counterbore hole into which a mounting bolt is inserted with a milling machine or a drilling machine.

[0006]

Conventionally, in a locate ring mounted on a molding die, the base material of the molding die is mainly a metal material, and the metal material is in an environment where it is easily available. Generally, it is formed of a metal material because it is excellent in durability and heat resistance. And, as far as the function of positioning for mounting the molding die on the holder of the molding machine was satisfied, the locate ring made of metal material was enough, so whether it can be replaced with other material or not. No specific research has been done. In recent years, with the increasing demand for cost reduction of products, and the tendency of high-mix low-volume production, the cost of molding dies has a large impact on product costs, and the cost of molding dies can be reduced. There is an increasing demand for cost reduction even for parts that compose a molding die such as a locate ring. However, a locate ring made of a metal material must be cut into a cylindrical tube, beveled, or beveled, or beveled for a mounting bolt, as described above. It took a lot of time and was an obstacle in reducing the cost of the locate ring. Further, compared to the total weight of the molding die, the proportion of the weight of the locate ring is small, but since the locate ring itself is distributed as a part, it has been desired to make it as light as possible. Furthermore, the molding dies have almost the same external shape when performing the same type of molding, such as injection molding, so it is possible to judge the delivery destination of the finished molded product at first glance only by the external shape. Since it is not possible, it is managed by the following methods, but each has problems. As a management method, it is common to directly write the molding name etc. on the molding die with white paint or to stamp the molding name etc. on the molding die, but in the case of the former,
It peels off due to the heat applied to the mold during the molding operation and the change with time such as rust generated in the mold during storage. In the latter case, there is a problem that it is difficult to judge at first glance.
In any case, the above management method has a problem that it is difficult to judge at first glance.

The present invention has been made in view of the above-described problems, and provides a locate ring which is easy to process and can be manufactured at low cost, and which is easy to handle, and a molding die to which the locate ring is attached. The first purpose is to provide. In addition to the function of positioning the molding die with respect to the holder of the molding machine in the locate ring,
A second object is to provide a molding die that has a new function and is easy to manage.

[0008]

The locate ring described in claim 1 is mounted on a molding die for injecting a resin or the like into a cavity from a molding machine to form a molded article having a predetermined shape, In the locate ring used for positioning when the molding die is attached to the holder of the molding machine, the locate ring is formed of resin. Further, the locate ring according to claim 2 is colored. Further, the locate ring according to claim 3 is prepared in advance by the number of the molding dies to be mounted, and is colored in a different color for each molding dies to be mounted or for each group of molding dies. It is characterized by that. The molding die according to claim 4 is a molding die for injecting a resin or the like into a cavity from a molding machine to mold a molded article having a predetermined shape, and is mounted on the molding die. The locate ring used for positioning when mounting the molding die in the holder of the molding machine is formed of resin. Further, the molding die described in claim 5 is characterized in that the locate ring is colored.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is a view showing a locate ring of the present invention, (a) is a plan view thereof, and (b) is A of (a).
FIG. 4 is a cross-sectional view taken along a line A. FIG. 2 is a rear view of the locate ring of the present invention. The locate ring 1 is formed by molding a resin material having high heat resistance, excellent corrosion resistance, and high strength by injection molding or the like. As the resin material, thermosetting resins are excellent in terms of heat resistance, and these resins can be used. In addition, thermoplastic resin is excellent in impact resistance, although it is slightly inferior in heat resistance,
Polyamide-based crystalline resin (for example, Teijin Amoco's trade name Amodel), nylon 46, polyphenylene sulfide, and the like can also be used as the material of the locate ring 1. The locate ring 1 has a pair of counterbore holes 2 formed diagonally, and is attached to the fixed side mounting plate of the molding die with bolts or the like through the counterbore holes 2. .

The locate ring 1 has a substantially donut shape, and a pair of counterbore holes 2 are formed at positions facing the central axis. Through the counterbore holes 2, the locate ring 1 is molded with a bolt or the like. It is attached to the fixed side mounting plate of the mold. Further, it has an outer wall surface 3 and an inner wall surface 4, and has a substantially inverted U-shaped cross section in which an opening portion 6 opening in a direction to be attached to the fixed side mounting plate is provided. Inside the opening 6, ribs 5 are formed that extend radially from the inner wall surface 4 toward the outer wall surface 3. The outer wall surface 3, the inner wall surface 4, and the rib 5 have a substantially uniform thickness.

In addition, when molding the locate ring 1, an ejector pin for taking out the locate ring 1 from the molding die is used as a base portion of the rib 5 (a contact portion between the outer wall surface 3 and the inner wall surface 4 and the rib 5). ), It is possible to prevent deformation when the locate ring 1 is taken out from the molding die. Further, by reinforcing the ribs 5, the thickness of the locate ring 1 can be reduced. Further, by reducing the thickness of the locate ring 1, it is possible to save the molding material, and by making the thickness of the locate ring 1 uniform, sinking of the material at the time of molding or deformation after molding. Can be suppressed.

By forming the locate ring 1 with the resin material in this manner, it is possible to easily mass-produce the locate ring 1 by using a technique such as injection molding and to reduce the manufacturing cost of the locate ring 1. Further, by using a resin material, the weight can be significantly reduced as compared with a metal material. Further, by using a resin material, coloring can be easily performed by mixing a pigment or the like into the material, so that the locate ring 1 of different colors can be manufactured.

The locate ring 1 thus formed can be incorporated into the molding die by replacing it with the locate ring of the conventional molding die shown in FIG.
By doing so, it is possible to easily use many locate rings 1 of different colors, and when installing the locate ring 1 on the molding die, use the locate ring 1 of different colors for each molded product, When using locate ring 1 that is color-coded for each delivery destination, or when assembling multiple molded products into one product, locate ring 1 of the same color is used for the molding dies of molded products that are the same product. If the color of the locate ring 1 is changed for each molding die or each group of molding dies, such as use, the use of the molding die can be easily identified simply by observing the color of the locate ring 1. It can be used for type management.

As described above, since the inside of the locate ring 1 is colored by using the colored resin material, unlike the one coated on the surface of the molding die, rust or the like is generated to make the coloring unclear. No effect of aging. In the above-described embodiment, the locate ring has a substantially donut shape, but the outer shape such as an elliptical shape, a triangular shape, a polygonal shape such as a quadrangle, or a cutout shape such as a substantially U-shaped shape is used. It can be variously modified as long as the mold can be positioned in the holder of the molding machine.

[0015]

As described above, by forming the locate ring mounted on the molding die from the resin material, the manufacturing cost can be reduced and the locate ring can be made lightweight. Further, by forming the locate ring with a resin material, the material itself can be easily colored, and the locate ring of many colors can be formed. And, it is easy to make many locate rings of different colors, and when installing the locate ring in the molding die, you can use different locate rings for each molded product or use different colors for each delivery destination of the molded product. When using a locate ring that has been used or when assembling multiple molded products into one product, if the locate ring of the same color is used in the molding die of the molded product that becomes the same product, The usage of the molding die can be easily identified simply by looking at the color, and it can be used for die management.

[Brief description of the drawings]

FIG. 1 is a view showing a locate ring of the present invention,
(A) is the top view, (b) is the sectional side view.

FIG. 2 is a rear view showing a locate ring of the present invention.

FIG. 3 is a side sectional view showing a conventional molding die.

FIG. 4 is a view showing a locate ring mounted on a conventional molding die, (a) is a plan view thereof, (b) is a side view thereof, and (c) is a CC line in (a). FIG.

[Explanation of symbols]

 1 locate ring 2 counterbore 3 outer wall 4 inner wall 5 rib 6 opening

Claims (5)

[Claims] 1. Positioning when a resin or the like is injected from a molding machine into a cavity to be mounted on a molding die for forming a molded product having a predetermined shape, and the molding die is mounted on a holder of the molding machine. A locate ring for a molding die, wherein the locate ring is formed of resin. 2. The locate ring of a molding die according to claim 1, wherein the locate ring is colored. 3. The locate ring is prepared in advance for the number of molding dies to be mounted, and is colored in a different color for each molding dies to be mounted or for each group of molding dies. The locate ring of the molding die according to claim 2, 4. A molding die for injecting a resin or the like into a cavity from a molding machine to mold a molded article having a predetermined shape, the molding die being mounted on the molding die, and the molding die of the molding machine. A molding die characterized in that a locate ring used for positioning when mounted on a holder is made of resin. 5. The molding die according to claim 4, wherein the locate ring is colored.