JP2522143Y2 - Air poppet valve in synthetic resin mold - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air poppet valve in a synthetic resin molding die.

[0002]

2. Description of the Related Art At the time of injection molding of a synthetic resin material, since a product after heat molding is closely attached to a core or a cabin while being hugged, a conventional mold is used to cool the product and easily remove it. From outside to the right place for the product inside
By floating the poppet valve blowing compressed air, a method of not floating the formed article portion in contact with the valves liberate the entire finished product has been taken.

However, according to such an air blowing method, since the pressure input of the air is extremely large, even the valve body fixed by crimping in the fitting groove of the mold floats, and sometimes the valve body floats. In some cases, the valve body is detached from the fitting groove. If the body in which the valve is installed is in such a state, it is technically difficult to install the body again in the fitting groove of the mold, which has been a problem in the injection molding industry. .

[0004]

An invention To solve the above problems, the present invention is to eliminate such drawbacks of the air poppet valve, to provide a mechanism which is improved as only the regulating by floating inclusive to the valve fractures reliably row It is the purpose.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an upper end of an upper die.
Is provided with a fitting groove perpendicular to the peripheral surface.
Keep a slight gap around it and fit the bottom with the fitting groove
Installed via a key on the bottom, center of the top of the valve body
Bottom of valves as well as Hama置the valve groove provided in the section
A horizontal plate is provided at the end of the facet, and the lower portion is
The concave part where the notch is inserted and the stopper at the bottom of the
Moving space is provided, and the empty space is provided at the base of the valve body.
A spiral opening is provided through the space, and the upper die
A through hole in the direction, and the lower part of the through hole
A space that is larger than the diameter is provided, and the spiral end of the hollow bolt
Into the helical opening of the valve body base through the through hole.
And lock the head to the hole entrance.
It consists of

[0006]

[Action] Now the heating after molding completion, the blown-products cooling air to be removed from the mold from the lower mold air passage of the air above the valve present in from space to the hollow bolt
Reach the space in the body . Then, since the push <br/> same against the support plate to the bullet machine, the valve via the projections for fixing the support plate
Floating from the groove . Since this formed article by floating valves ing to be pushed up, the entire finished product comes to free floating from the upper <br/> mold.

When returning the floated valve to its original position, if the blowing of the compressed air is stopped , the pressurizing force that has pushed up the support plate is lost, and the stretcher is extended again to push down the support plate. , the valve is to match the return mold surface a concave groove of the original position via the projections.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 1 is a lower mold, and compressed air is partially applied to the lower mold.
There is an air passage 2 for feeding , and this air passage is a space 3 inside the lower mold.
Lead to.

Reference numeral 4 denotes an upper mold. The lower end of the upper mold in contact with the lower mold 1 has the same diameter (for example, 30 m) that fits the space 3 of the lower mold.
m) of the space portion 5 is provided.

Reference numeral 6 denotes a through hole formed above the space portion 5 of the upper die 4, and a long hollow 7 'bolt 7 is installed in this through hole. The head 8 of the hollow bolt 7 is also hollow 8 '.
The head is locked at the entrance of the through hole at the upper end of the space 5.

Reference numeral 9 denotes a fitting groove (having a diameter of, for example, 30 mm ^H7 ) provided on the upper die 4 and having a vertical peripheral surface , and the depth of the fitting groove is, for example, 50 mm. “H7” is a tolerance symbol, which is the basic dimension plus 2/100 mm. This is the gap between the valve body 14 and the inner peripheral surface of the upper mold 4 to be fitted.

Reference numeral 10 denotes a fitting fixed to the lower portion of the fitting groove 9 .
The spiral port 11 is formed at the center of the base of the valve body 14. The spiral tip 12 before Symbol in <br/> empty bolts 7 to the helical opening 11 is screwed, the internal space portion 13 of the open mouth end of the hollow bolt 7 the valve body 14
To be installed. The base 10 of the valve body 14 is
Fixed by key 21 in the bottom portion.

Reference numeral 14 denotes a valve body which is fitted and fixed in the fitting groove 9. This valve body is provided with the fitting groove 9 as described above.
Is fitted with a clearance fit to the peripheral surface .

Reference numeral 15 denotes a groove provided at the center of the upper end of the valve body 14, and a valve 16 is fitted into the groove. This is the bottom surface of the valve 16 provided projections 17, the ends of the projections provided horizontal plate 18 to move up and down inside the space 13.

On the horizontal plate 18, a stretcher 20 is interposed in a concave portion 19 through which the projection 17 penetrates.

[0016]

According to the present invention, the valve body is supported so that it is always pulled downward by screwing the hollow bolt.
From being fixed to the inside of the upper mold by a key with the, when blown in compressed air to promote release from the mold in the removal initial heating moldings, all in the body to be installed the valve impact without giving the, Ki de be allowed to float the this affects only the valve,
The floating withdrawal of the valve body by blowing up of the compressed air will be able to completely prevent, Ru can be taken out of heating the molded article smoothly and quickly.

Further, the valve body is fitted into the fitting groove of the mold with a gap , and a hollow bolt is formed from below using a wrench.
Release the screw to release the valve from the top of the mold.
The main body can be picked up, so if it is necessary to repair or replace parts due to failure, place it on the upper part of the mold.
Can be easily replaced by
To eliminate the disadvantage of having to dismantle all the molds
And a highly economical mold apparatus.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part of the apparatus.

FIG. 2 is a front sectional view of a main part of FIG. 1;

[Description of Signs ] 4 Upper Die 6 Through Hole 7 Hollow Bolt 8 Head 9 Fitting Groove 10 Base 11 of Valve Body 11 Spiral Port 13 Space 14 Valve Body 15 Concave Groove 16 Valve 17 Protrusion 18 Horizontal Plate 19 Recess 20 Stretching ammunition

Claims (1)

(57) [Scope of request for utility model registration] 1. A fitting groove having a vertical peripheral surface is provided at an upper end of an upper die.
The valve body into this fitting groove with a slight gap around it.
Hold and set the bottom on the bottom of the fitting groove via a key
And a valve provided in a central groove provided in a central portion of an upper end of the valve body.
And a horizontal plate at the end of the bottom protrusion of the valve.
And a recess into which the projection is fitted below the recessed groove.
And a space in which the horizontal plate moves up and down,
At the base of the body, a spiral opening is provided through the space,
A through hole is provided downward from the spiral opening in the upper mold and below it.
A space portion larger than the diameter of the through hole is provided in the
The spiral end of the empty bolt is passed through the through-hole to the valve body.
Engage with the screw hole of the base and let the head through
Air poppet valve in the synthetic resin molding mold composed so as to engage with the.