JP2005014543A - Mold equipment for injection molding and method for alteration of specifications of injection molded article using the equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide mold equipment for injection molding which enables the alteration of the specifications of a molded article without replacement of a nest. <P>SOLUTION: The mold equipment 8 for injection molding is used in common for molding a plurality of resin molded articles different at least in the number of holes. The mold equipment 8 has a stationary-side mold 1, a movable-side mold 2 which is movable in relation to the stationary-side mold 1 and has a vacant space inside, a cavity 10 which is a molded article molding part formed by the stationary-side mold 1 and the movable-side mold 2, a control block 4 which is held in the movable-side mold 2 and has at least one control pin 12, and at least one spring 5 which urges the control block 4 against the stationary-side face of the vacant space 7 in the movable-side mold 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an injection mold apparatus in which a mold is molded by filling a resin in a cavity formed by a fixed mold and a movable mold, and a fixed mold and a movable mold. In particular, the present invention relates to an injection mold apparatus that can change the specifications of a molded product without replacing the insert.
[0002]
[Prior art]
Conventionally, regarding the ejection of an injection molded product having an undercut, the injection molded product having an undercut has been ejected using a control block, a spring or the like. (For example, see Utility Model Registration Document 1)
[0003]
[Utility model registration document 1]
Real registration No. 2600593 [0004]
However, for example, if you want to manufacture a resin injection molded product with two holes and then make three holes, you will need to prepare two nestings and replace the nesting. It was. If the nesting is exchanged in this way, it takes time and effort from the removal of the nesting to the installation, resulting in extra costs and increased costs.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and it is an object of the present invention to provide an injection mold apparatus that does not require a step of exchanging inserts, saves labor and time, and does not increase costs. And
[0006]
[Means for Solving the Problems]
An injection mold apparatus according to claim 1 of the present invention for solving the above-mentioned problem is an injection mold apparatus for molding a resin molded product having at least one hole, which is a fixed side. A mold, a movable mold that is movable with respect to the fixed mold, and has a space therein, and a cavity that is a molded part formed by the fixed mold and the movable mold. An injection mold apparatus having a control block housed in the movable mold and having a control pin, and at least one spring pressing the control block against a fixed side surface of a space in the movable mold. is there.
[0007]
According to invention of Claim 1, it is an injection mold apparatus for shape | molding the resin molded product which has at least 1 hole, Comprising: It is movable with respect to a stationary mold and the said stationary mold. And a movable mold having a space therein, a cavity that is a molded part formed by the fixed mold and the movable mold, and a control pin that is housed in the movable mold. Since it is an injection mold apparatus having a control block and at least one spring that presses the control block against a fixed side surface of the space in the movable mold, the control block having the control pin is fixed to the fixed mold. By moving in the direction and bringing the tip of the control pin into contact with the cavity surface of the fixed mold, it is possible to increase at least one hole in the injection-molded product, eliminating the need to replace the insert.
[0008]
The invention according to claim 2 has at least two springs for pressing the control block against the fixed side surface of the space in the movable mold, and a positioning bolt for controlling the position of the control block. It is in the mold equipment for injection molding.
[0009]
According to a second aspect of the present invention, there is provided at least two springs for pressing the control block against a fixed side surface of the space in the movable mold, and a positioning bolt for controlling the position of the control block. Therefore, it is possible to reliably increase the number of holes in the injection-molded product without changing the insert, and at the same time increase the number of holes with high accuracy in the injection-molded product.
[0010]
The invention according to claim 3 is a method for manufacturing a plurality of resin molded products having at least different numbers of holes in the same mold apparatus in common without exchanging the mold apparatus or mold parts, A side mold, a movable mold, a space in the movable mold, a control block installed in the space, and at least one control pin on the fixed mold side of the control block; By moving the control block in the direction of the fixed mold and bringing the tip of the control pin into contact with the cavity surface of the fixed mold or protruding partway through the cavity, at least one through-hole or depression or There is an injection molding specification change method that can increase the number of non-through holes and change the specification of the injection molding product.
[0011]
According to the invention described in claim 3, a method of manufacturing a plurality of resin molded products having at least different numbers of holes in the same mold apparatus in common without exchanging mold apparatuses and mold parts, A fixed-side mold and a movable-side mold, a space in the movable-side mold and a control block installed in the space, and at least one control pin on the fixed-side mold side of the control block; The control block is moved toward the fixed mold, and the tip of the control pin is brought into contact with the cavity surface of the fixed mold or protruded to the middle of the cavity, so that at least one through-hole or depression is formed in the injection molded product. Because it is an injection molding specification change method that can change the specifications of injection molded products by increasing the number of non-through holes, the specification of molded products can be changed without replacing the insert, reducing the number of parts and man-hours and reducing costs. Can
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of an injection mold apparatus according to the present invention will be described with reference to the drawings.
[0013]
(Example 1)
FIG. 1 shows an injection mold apparatus 8 for producing an injection molded product having two holes shown in FIG. FIG. 2 shows an injection mold apparatus for producing an injection molded product having the three holes shown in FIG. 3 and 4 are both produced by the same injection molding die device 8.
[0014]
First, as shown in FIG. 1, an injection molded product (A specification product) having two holes is manufactured in the cavity 10, the product is released from the mold, and then injection having three holes 9 as the next product specification. A molded product 13 is manufactured. At the stage of moving from FIG. 1 to FIG. 2, the control block 4 is moved to the fixed mold 1 side while the spring 5 is contracted by tightening the positioning bolt 3. FIG. 2 shows a state in which the positioning bolt 3 has been tightened.
[0015]
In FIG. 2, the tip of the control pin 12 of the control block 4 is in contact with the cavity surface 14 of the stationary mold 1, and the spring 5 is housed in the space 7. When resin injection molding is performed in this state, a resin molded product (B specification product) having three holes is obtained.
[0016]
Further, when returning from the B specification product of FIG. 2 to the manufacture of the A specification product of FIG. 1, the control block 4 is returned by the force of the spring 5 if the positioning bolt 3 is loosened, and the cavity structure for manufacturing the A specification product. Become. Further, the movement method of the control block 4 is not limited to the tightening of a bolt or the like, but can be moved by an operating mechanism such as a cylinder, and is not particularly limited to these movement methods.
[0017]
In the control block used in the present invention, for example, the control pin may be a polygonal shape instead of a cylindrical shape, or the control block may be stopped halfway to form a recess in the molded product instead of a through hole. Further, if a plurality of control blocks are installed in the mold, it is possible to change the specification of a molded product in which a plurality of holes are increased when the specification is changed. The present invention is not limited to the above-described embodiment, but includes changes in the specifications of molded products that change the shape of the holes or increase a plurality of holes at once.
[0018]
【The invention's effect】
According to invention of Claim 1, it is the injection mold apparatus used in common in order to shape | mold the several resin molded product from which the number of holes differs at least, Comprising: A fixed side metal mold | die and the said fixed side metal mold | die A movable mold having a space inside thereof, a cavity that is a molded product forming part formed by the fixed mold and the movable mold, and the movable mold. A control pin comprising: a control block having at least one control pin; and at least one spring pressing the control block against a fixed side surface of the space in the movable mold. By moving the control block with a fixed mold toward the fixed mold and bringing the tip of the control pin into contact with the cavity surface of the fixed mold, at least one hole can be added to the injection molded product, and the insert can be replaced. Need to There is an effect that disappears.
[0019]
According to a second aspect of the present invention, there is provided at least two springs for pressing the control block against a fixed side surface of the space in the movable mold, and a positioning bolt for controlling the position of the control block. Therefore, it is possible to reliably increase the number of holes in the injection molded product without exchanging the insert, and at the same time, increase the number of accurate holes in the injection molded product.
[0020]
According to a third aspect of the present invention, there is provided a method of manufacturing a plurality of resin molded products having different numbers of holes at the same time in the same mold apparatus without exchanging mold apparatuses and mold parts, A mold, a movable mold, a space in the movable mold, a control block installed in the space, and at least one control pin on the fixed mold side of the control block; By moving the block in the direction of the fixed mold and bringing the tip of the control pin into contact with the cavity surface of the fixed mold or protruding partway through the cavity, at least one through-hole is formed in the injection molded product, Because it is an injection molding specification change method that can increase the number of through-holes and change the specifications of the injection molding, the specification of the molding can be changed without replacing the insert, reducing the number of parts and man-hours, and reducing costs. That There is a result.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an injection molding apparatus according to the present invention for producing an A-shaped injection molded product.
FIG. 2 is an injection mold apparatus according to the present invention, and shows a state in which a control block protrudes into a cavity in order to change to manufacturing an injection molded product of B specification.
FIG. 3 is an example of an injection molded product manufactured in the state of the injection molding die apparatus of FIG. 1;
4 is an example of an injection molded product manufactured in the state of the injection molding die apparatus of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed side metal mold 2 Movable side metal mold 3 Positioning bolt 4 Control block 5 Spring 7 Space 8 Injection mold device 9 Hole 10 Cavity 11 Injection molded product 12 having two holes Control pin 13 Injection having three holes Molded product 14 Cavity surface of fixed mold

Claims (3)

An injection mold apparatus that is commonly used to mold a plurality of resin molded products having different numbers of holes,
A fixed mold,
A movable mold that is movable relative to the fixed mold and has a space therein;
A cavity that is a molded part forming part formed by the fixed side mold and the movable side mold,
A control block housed in the movable mold and having at least one control pin;
At least one spring pressing the control block against a fixed side surface of the space in the movable mold,
A mold apparatus for injection molding, comprising: The injection mold apparatus according to claim 1, further comprising at least two springs for pressing the control block against a fixed side surface of a space in the movable mold and a positioning bolt for controlling the position of the control block. A method of manufacturing at least a plurality of resin molded products having different numbers of holes in the same mold apparatus without exchanging mold apparatuses and mold parts, and comprising a stationary mold and a movable mold The movable side mold has a space, a control block is installed in the space, the control block has at least one control pin on the fixed side mold side, and the control block is directed toward the fixed side mold. By moving the tip of the control pin into contact with the molded part molding part surface (cavity surface) of the fixed mold or by protruding partway through the molded part molding part (hereinafter referred to as cavity), at least the injection molded product A method for changing the specification of an injection-molded product, wherein the specification of an injection-molded product can be changed by increasing one through hole, or by increasing the number of depressions or non-through holes.

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