JPH08284B2 - Mold structure of degassing device in injection molding machine and jig for taking out degassing device body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degassing device for an injection molding machine such as die casting. More specifically, the degassing apparatus main body is constructed by separating the degassing apparatus main body from a fixed die or a movable die, and is detachable from the die, and the degassing apparatus main body. The present invention relates to a degassing device main body take-out jig for easily taking out the gas from the fixed or moving mold.

[0002]

2. Description of the Related Art As an injection molding machine, one disclosed in, for example, Japanese Patent Laid-Open No. 63-313645 is known. The injection molding machine disclosed in the above publication will be described with reference to FIG.

FIG. 8 is a sectional view showing the outline of the configuration of a conventional injection molding machine. The injection molding machine has a fixed mold 1 and a movable mold 3, and a cavity 9 is formed between the fixed mold 1 and the movable mold 3. The lower end of the cavity 9 is connected to the runner 5 via the gate 7. One end of the casting sleeve 11 is inserted into the lower portion of the fixed mold 1, and the inserted one end communicates with the lower end of the runner 5. At the other end of the casting sleeve 11, there is a pouring port 13
Are formed, and the molten metal is poured through the pouring port 13. A plunger 15 is housed in the casting sleeve 11 so as to be slidable in the axial direction of the sleeve 11. This plunger 15 has an injection cylinder 19 via a shaft 17.
The plunger 15 slides in the casting sleeve 11 by driving the injection cylinder 19.

A striker 21 is attached to the end of the shaft 17 on the injection cylinder 19 side. Further, the injection cylinder 19 is activated to move the striker 2 together with the shaft 17.
At the position where the striker 21 passes when 1 moves,
A vacuum start limit switch 23 and a high speed limit switch 25 are arranged.

The contact surfaces of the fixed movable dies 1 and 3 are divided surface portions 2.
7, a gas vent passage 29 is formed above the dividing surface portion 27. The gas vent passage 29 is provided with a pipe 31.
It is connected to the vacuum suction device 33 via. The vacuum suction device 33 includes an electromagnetic switching valve 35, a tank 37, a vacuum pump 39, and a drive motor 41. The electromagnetic switching valve 35 has a first switching position 35a and a second switching position 35a.
Of the first switching position 3b.
When switching to 5a, the gas vent passage 29 and the vacuum suction device 33 are communicated.

An on-off valve 43 is inserted in the gas vent passage 29. The open / close valve 43 is configured to be opened / closed by a valve drive mechanism 45. The on-off valve 43 is composed of a valve body 47 and a valve rod 49. This valve rod 49
Is connected to a piston 53 slidably accommodated in a valve driving cylinder 51. The valve drive mechanism 45 has a valve drive compressor 55 and an electromagnetic switching valve 57 which are located outside the injection molding machine. The compressor 55 is connected to the valve driving cylinder 5 via pipes 59 and 61 via the electromagnetic switching valve 57.
Connected to 1. Compressed air from the valve driving compressor 55 is selectively supplied into the front chamber 63 or the rear chamber 65 of the valve driving cylinder 51 through the electromagnetic switching valve 57 and the pipes 59 and 61.

With this compressed air, the piston 53 slides back and forth in the valve driving cylinder 51. By the sliding of the piston 53, the valve element 47 is brought into and out of contact with the seat portion 67 to open and close the valve. The electromagnetic switching valve 57 has a first switching position 57a and a second switching position 57b. At the first switching position 57a, the compressed air passes through the pipe 59 and the front chamber 63.
The valve body 47 is seated on the seat 67 and the communication between the gas vent passage 29 and the pipe 31 is cut off. On the other hand, at the second switching position 57b, the compressed air is supplied to the rear chamber 65 via the pipe 61 to move the piston 53 forward so that the valve element 47 is separated from the seat portion 67, and the gas vent passage 29 and the pipe 31 are communicated with each other. It

A molten metal detection rod 69 is installed in the gas vent passage 29. This molten metal detection rod 69 is the plunger 15
The molten metal pushed up from the direction of the sleeve 11 is detected by and the molten metal detection signal is sent to an electric circuit (not shown). According to this signal, the electric circuit controls the electromagnetic switching valve 57,
The on-off valve 43 is opened and closed.

Next, the operation of the injection molding machine having the above construction will be described. First, with the on-off valve 43 open, the molten metal is poured into the sleeve 11 through the pouring port 13. Then,
The injection cylinder 19 is driven to slide the plunger 15 in the sleeve 11 in the fixed mold 1 direction. The slide of the plunger 15 closes the pouring port 13, and the striker 21 actuates the vacuum start limit switch 23. In response to the operation of the vacuum start limit switch 23, the electromagnetic switching valve 35 is switched to the first switching position 35a by an electric circuit (not shown). By the operation of the electromagnetic switching valve 35, the gas vent passage 29 and the vacuum suction device 33 are communicated with each other, and the gas in the casting sleeve 11, the runner 5, and the cavity 9 is sucked through the gas vent passage 29 and the pipe 31 to the outside of the mold. Exhausted to.

When the plunger 15 further slides in the sleeve 11, the molten metal fills the cavity 9, is further pushed into the gas vent passage 29, and comes into contact with the molten metal detection rod 69. This contact causes the molten metal detection rod 69 to generate a molten metal detection signal. This signal causes the electric switching circuit 5
7 is switched to the first switching position 57a. The electromagnetic switching valve 5
7, the compressed air from the valve driving compressor 55 is supplied into the front chamber 63 of the valve driving cylinder 51, and the piston 53 moves backward in the cylinder 51 (valve element 4).
7) in the direction opposite to the direction in which 7 is connected. When the piston 53 retracts to a predetermined position, the valve body 47 is seated on the seat 67 and the valve is closed. By closing the opening / closing valve 43, the communication of the gas vent passage 29 with the vacuum suction device 33 is cut off, and the vacuum suction from the vacuum suction device 33 toward the cavity 9 and the gas vent passage 29 is stopped.

[0011]

Generally, in an injection molding machine, the gas vent passage 29 and the open / close valve 43 are used during injection molding.
Molten metal penetrates into the vicinity. Then, when injection molding is repeatedly performed, a small casting residue adheres to the vicinity of the valve rod 49 and accumulates as an adhered substance. Mataabura etc. is both deposited child as deposits with baked on the valve stem 49. If malfunctions of the degassing equipment occur due to these deposits, the degassing equipment should be maintained and inspected to remove adhering as-cast, etc., or to replace the parts with new ones. Need to be replaced.

However, in the conventional injection molding machine having the above-described structure, the gas vent passage 29 is formed directly on the molds 1 and 3, and the on-off valve 43 and members in the vicinity thereof are fixed. Since it is not configured to be easily attached to and detached from the mold 1 or the movable mold 3, maintenance of the degassing device
There was a problem that inspection and parts replacement work was difficult.

To solve such a problem, the structure near the gas vent passage 29 and the opening / closing valve 43 may be a separate unit so that it can be attached to and detached from the fixed mold 1 or the movable mold 3. It is conceivable that, in that case, it is expected that the unit will be difficult to remove due to casting, deformation of the mutual surfaces, etc., and maintenance / inspection work, etc. will not be easily performed.

The present invention has been made in view of the above-mentioned problems, and the structure in the vicinity of the gas vent passage and the on-off valve is a separate unit, which is detachable from the fixed mold 1 or the movable mold 3, and An object of the present invention is to provide a die structure and a jig for a degassing device in an injection molding machine, which can facilitate the work of taking out the unit.

[0015]

In order to achieve the above object, the present invention provides a mold having a cavity therein, a gas vent passage for communicating the cavity with the outside air, and selectively interrupting the communication. In a mold structure of a degassing device in an injection molding machine, which comprises a shutoff means, a die body having a fitting opening and the shutoff means are provided inside and separately and independently of the die body. And a degassing device body having a constant outer contour, and having the same contour as the outer contour of the degassing device body together with the fitting opening by being fitted into the fitting opening. A nest that forms a degassing device body fitting recess into which the degassing device body is detachably inserted, and the degassing device body that is fitted into the degassing device body fitting recess Fixing means for fixing It provides a mold structure of the degassing device in an injection molding machine having a.

According to the present invention, further, a mold body having a cavity therein, a gas vent passage for communicating the cavity with the outside air and having a fitting opening formed therein, and a breaking means for selectively blocking the communication are provided. By being fitted inside the degassing device main body, which is provided separately from the mold main body and has an exhaust pipe mounting hole on the upper end surface and has a constant outer contour, and is fitted into the fitting opening, A nest having a contour that is the same as the outer contour of the degassing apparatus main body in combination with the fitting opening, and that forms a degassing apparatus main body fitting insertion recess into which the degassing apparatus main body is detachably inserted; The fitting recess of the mold structure of the gas venting device in the injection molding machine, which has a fixing means for fixing the gas venting device body fitted in the gas venting device main body fitting recess. Against the degassing device body A jig for ejecting a main body of a gas venting device, which is installed on the mold body so as to face the exhaust pipe mounting hole of the main body of the gas venting device. A jig body having a hole formed at a position facing the hole, a head, and a shaft end portion that can be inserted into the hole portion of the jig body and screwed into the exhaust pipe mounting hole. And a bolt-shaped moving member having a shaft portion that is integral with the head, and a bolt-shaped moving member that is provided between the bolt-shaped moving member and the jig body for vertically moving the bolt-shaped moving member. A moving member driving means, the jig body is installed on the degassing device body, and the shaft end of the bolt-shaped moving member is screwed into the exhaust pipe mounting hole of the degassing device. By driving the driving means to move the degassing apparatus main body in the vertical direction with respect to the jig main body, the degassing is performed. It provides a venting apparatus body extraction jig that enables Remove the device body.

[0017]

In the mold structure of the present invention having the above structure, the main body of the degassing device including the on-off valve is unitized, and is defined by the main mold body (fixed mold or moving mold) and the nest. Since it is configured such that it can be easily attached to and detached from the recess for fitting the degassing device body, the degassing device body can be easily attached to and detached from the mold body. For this reason, it becomes possible to easily perform maintenance / inspection work of the degassing device such as removal of cast ashes adhering near the on-off valve, and replacement work of damaged parts.

Further, in the degassing apparatus main body take-out jig of the present invention having the above-mentioned structure, the end portion of the bolt-shaped moving member supported by the take-out jig body is screwed into the degassing apparatus body. By pulling up the moving member by the driving means, the degassing apparatus main body can be easily taken out from the mold main body.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mold structure of a degassing device in an injection molding machine according to a first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is an exploded perspective view showing the configuration of the main part of the mold structure of the gas venting device of this embodiment.

The mold structure of the degassing apparatus of this embodiment has a T-shaped opening (fitting opening) 103 having a T-shaped cross section at the upper part of the joint surface with a moving mold (not shown). The fixed mold 101 and the nest 105 fitted into the T-shaped opening.
And a degassing device main body 113 and the like which is detachably inserted into an opening portion (recessed portion for inserting the degassing device main body) 111 having a cross-shaped cross section defined by the T-shaped opening 103 and the nest 105. It

The T-shaped opening 103 having a T-shaped cross section is formed on the uppermost portion of the fixed mold 101 on the side of the joint surface with the moving mold (not shown). The T-shaped head of the T-shaped opening 103 has the same depth as the height of the nest 105. Further, the T-shaped foot portion of the T-shaped opening 103 has the same depth as the height of the degassing apparatus main body 113. Further, contact surfaces d ′ and f ′ are formed on the T-shaped head of the T-shaped opening 103.

The nest 105 is fitted into the T-shaped head of the T-shaped opening 103. This nest 105 is the T
A T-shaped groove portion 109 having the same width as the T-shaped head portion of the character-shaped opening 103 and having a T-shaped cross section is formed. A contact surface g ′ is defined on the bottom surface of the T-shaped groove portion 109. Further, the depth of the T-shaped groove 109 is the same as the height of the degassing apparatus main body 113.
Contact surfaces a ′ and b ′ are formed on the left and right sides of the T-shaped foot of 9 and contact surfaces c ′ and e ′ are formed on the lower side of the T-shaped head. A gas vent passage 107 is formed on the joint surface side of the insert 105 with the moving die. Further, a pair of screw holes 127 into which bolts 121 described later can be screwed are formed on the upper surface of the insert 105. When this nest 105 is fitted into the T-shaped head of the T-shaped opening 103, the T-shaped opening 103 of the fixed mold 101 and the T-shaped groove 109 of the nest 105 form a cross-shaped cross section. -Shaped cross-shaped groove (recess for fitting the main body of the degassing device) 1
11 is formed (FIG. 1).

The degassing device main body 113 is detachably fitted into the cross-shaped groove portion 111. Although not shown inside the degassing apparatus main body 113, the same cylinder, piston, valve body, and the like as those described in the section of the prior art,
The seat etc. are incorporated. The degassing apparatus main body 113 has a cross-shaped cross section, and a lateral positioning protrusion 113c formed so as to project from the direction of the fixed mold 101 in the direction of the joint surface with the moving mold (not shown), and the lateral positioning. Front-rear direction positioning protrusions 113a and 113b are formed so as to protrude from the base portion of the protrusion 113c at right angles to the protrusion 113c.

The width and depth of the lateral projection positioning projection 113c are the same as the width and depth of the T-shaped foot portion of the T-shaped groove portion 109 of the insert 105. The contact surfaces a and b are provided on the lateral side surfaces of the lateral positioning protrusion 113c.
Is formed, and a contact surface g is formed on the lower surface thereof. Further, the front-back direction positioning protrusions 113a and 113b
The contact surfaces e, f and c, d are formed on each of the contact surfaces. The widths of the front-rear direction positioning projections 113a and 113b are determined by the contact surfaces c'and e'of the T-shaped groove portion of the insert and the contact surfaces d'and f'of the T-shaped opening portion 103 of the fixed mold 103. It is equal to the distance. Also, the degassing device body 1
The width of the cross-shaped sleeve portion 13 (the distance between the widthwise end faces of the protrusion 113a and the protrusion 113b widthwise end face) is T of the nest 105.
It is formed to be slightly smaller than the widthwise distance of the head portion of the character-shaped groove portion 109. Further, the width and length of the cross-shaped foot portion of the degassing apparatus main body 113 are formed to be slightly smaller than the width and length of the T-shaped foot portion of the T-shaped opening 103 of the fixed mold 101. . That is, the degassing device main body 113
The outer shape of is substantially the same as the shape of the cross-shaped groove portion 111 defined by the T-shaped opening portion 103 of the fixed mold 101 and the T-shaped groove portion 109 of the insert 105, and is formed as described above. The degassing device main body 113 is removably and positioned and fitted into the cross-shaped groove portion 111.

Further, the valve hole 1 is formed on the surface of the degassing apparatus main body 113 on the moving die side (the side surface of the lateral positioning protrusion 113c).
15 is formed, and an exhaust pipe mounting hole 117 is formed on the upper surface thereof. The valve hole 115 and the exhaust pipe mounting hole 117 are in communication with each other inside the degassing apparatus main body. The above-mentioned valve body and seat portion (not shown) are arranged in this communicating portion. Further, a female screw portion is formed on the inner circumference of the exhaust pipe mounting hole 117, and the mounting hole 117 is connected to a vacuum pump (39 in FIG. 8) through an electromagnetic switching valve (35 in FIG. 8). The air distribution pipe (31 in FIG. 8) is screwed.

The mold structure of this embodiment further includes fixing means 119 for fixing the degassing apparatus main body 113 to the fixed mold 101. The fixing means 119 is a bolt 121.
And the plate 125, and the plate 125 has bolts 12
A long hole 123 having a size that allows the shaft portion 1 to be inserted therein is formed. The plate 125 has a bolt 1
When it is fixed on the insert 105 by 21, a part thereof comes into contact with the upper end surface of the degassing device body 113, and has a size large enough to fix the degassing device body 113 in the cross-shaped groove portion 111. ing.

Next, the assembling of the mold structure of the degassing apparatus of this embodiment having the above-mentioned structure will be described. First, the insert 105 is fitted into the head of the T-shaped opening 103 of the fixed mold 101. As a result, the T-shaped opening of the fixed mold 101 and the T-shaped groove 109 of the insert 105 define the cross-shaped groove 111 having a cross-shaped cross section. Next, the degassing device main body 113 is fitted into the cross-shaped groove portion 111. At this time, the positioning of the cross-shaped groove portion 111 in the left-right direction (X direction in the drawing) is performed by contacting the contact surfaces a and b on the degassing apparatus body 113 with the contact surfaces a ′ and b ′ of the cross-shaped groove portion 111. By doing. Further, the positioning in the front-rear direction (Y direction in the drawing) is performed by using the contact surfaces c, d, and
e and f are contact surfaces c ′, d ′ in the cross groove portion 111,
It is carried out by bringing them into contact with e'and f ', respectively. Further, the vertical positioning is performed by bringing the contact surface g of the degassing device body 113 into contact with the contact surface g ′ of the bottom of the cross groove 111.

The degassing device main body 113 has a cross-shaped groove 111.
Then, the degassing apparatus main body 113 is pressed and fixed in the cross-shaped groove 111 by the fixing means 119. First, the plate 125 is brought into contact with the upper end surface of the insert 105. At this time, the long hole 123 of the plate 125 is inserted into the nest 10.
5 corresponding to the screw hole 127 on the upper surface,
A part of 5 also contacts the upper end surface of the degassing device main body 113. Further, the bolt 121 is inserted into the elongated hole 123 of the plate body 125 and screwed into the screw hole 127 on the upper portion of the insert 105. This operation is also performed on the other screw-in hole portion 127 of the pair of screw-in hole portions 127. By tightening the bolt 121, the plate members 125, 125
Firmly contacts the upper end surface of the insert 105 and the degassing device main body 113 to prevent the degassing device main body 113 from coming off.

The degassing device main body 113 is fixed to the fixed mold 1
When removing from 01, first loosen the bolt 121 and move the plate body 125 to the movable range by the long hole 123 of the plate body 125.
125 is moved to release the contact between the plate body 125 and the upper surface of the degassing device 113. Then, the degassing device 113 is pulled out from the fixed mold 101 using a take-out jig described later.

Next, the mold structure of the second embodiment of the present invention will be described with reference to FIG. Since the components of the mold structure of this embodiment are the same as those of the first embodiment, the fixing means 119 and the like are omitted in FIG. The difference between this embodiment and the second embodiment is the shape of the gas venting device body 113 'and the cross-shaped groove portion 11 into which the gas venting device body 113' is fitted.
The shape is 1 '.

The fixed die 101 'of this embodiment has a T-shaped cross section.
It has a T-shaped opening with a T-shape, and the nest 105 'also has a T-shaped groove with a T-shaped cross section. Then , as in the case of the first embodiment, when the insert 105 'is fitted into the T-shaped opening of the fixed mold 101', the T-shaped opening and the insert 10 are inserted.
5'forms a cross-shaped groove portion (recess for fitting the degassing device main body) 111 'having a cross-shaped cross section.

As shown in FIG. 2, the degassing apparatus main body 113 'of this embodiment is the degassing apparatus main body 11 of the first embodiment.
3 has a cross-shaped cross section. That is, the degassing device main body 113 ′ includes a lateral positioning protrusion 113c ′ formed in the direction of a movable mold (not shown), and a direction perpendicular to the lateral positioning protrusion from a root portion of the lateral positioning protrusion 113c ′. Front and rear direction positioning protrusions 113a 'and 113b' that are respectively formed to project. The respective positioning protrusions 113a ', 113b', 113
c'has a shape tapering toward the lower end surface of the degassing apparatus main body 113 '(FIG. 2). Corresponding to the shape of each of the positioning protrusions, the cross-shaped groove portion 111 ′ into which the degassing apparatus main body 113 ′ is fitted is also configured to taper toward the lower side of the fixed mold 101.

That is, the contact surfaces a and b provided on the lateral positioning protrusion 113'c of the degassing apparatus main body 113 'are formed as inclined surfaces having a draft. The contact surfaces a'and b'of the insert 105 'with which the contact surfaces a and b of the gas vent apparatus body 113' come into contact when the gas vent apparatus body 113 'is fitted into the cross-shaped groove portion 111' are It is formed as an inclined surface corresponding to the draft of the contact surfaces a and b of the lateral positioning protrusion 113 '. Similarly, the front-rear direction positioning protrusions 113a ', 11 of the degassing apparatus main body 113' are
The contact surfaces c and e provided on 3b 'are also formed as inclined surfaces having a draft, and the nest 1 with which these contact surfaces contact
The contact surfaces c ′ and e ′ of 05 ′ are also formed as inclined surfaces corresponding to the contact surfaces c and e.

In the above embodiment, the contact surfaces a, b, c, e and a ', b', c ', e'are formed as inclined surfaces having a draft, but the contact surfaces c, e. And c ′, e ′, not the contact surfaces d, f of the front-rear direction positioning projections 113a ′, 113b ′ and the contact surfaces d ′, f of the fixed mold 101 ′ with which the contact surfaces d, f abut. 'May be formed on the inclined surface. In this case, the contact surfaces a, b, d, f and a ′, b ′,
d'and f'are formed on the inclined surface. Also, the contact surfaces a to f,
Alternatively, all of a ′ to f ′ may be formed on an inclined surface having a draft. With this configuration, the degassing device body 11
When the 3'is fitted into the fitting recess 111 ', focusing on, for example, the slopes a and b of the lateral positioning protrusion 113c' and the slopes a'and b'of the fitting recess 113 ', the slope a', Since the distance between the upper end openings of b'is larger than the distance between the lower ends of the inclined surfaces a and b, the lateral positioning protrusion 113c 'can be easily inserted into the fitting recess, and when the insertion is completed. As in the first embodiment, the degassing body 113 'is closely fitted into the fitting recess.

Next, a third embodiment of the present invention will be described with reference to FIG. Since the mold structure of the third embodiment is basically the same as the mold structure of the first embodiment, the fixing means 11 is used.
9 and the like are omitted in FIG. The difference from the first embodiment is the cross-sectional shape of the degassing apparatus main body 213, the T-shaped opening of the fixed mold 201, and the T of the insert 205.
4 is a cross-sectional shape of a groove portion (recessed portion for inserting the gas venting device main body) formed by the V-shaped groove portion 209. The details will be described below.

The fixed mold 201 of this embodiment has a T-shaped opening 203 having a T-shaped cross section similar to the fixed mold 101 of the first embodiment. A nest 205 having a T-shaped groove 209 having a T-shaped cross section is fitted into the T-shaped head of the T-shaped opening 203. Here, T of the T-shaped groove portion 209
The direction of the character is opposite to that of the first embodiment. A contact surface a′b ′ is formed on the side surface of the T-shaped groove of the T-shaped groove portion 209, and contact surfaces c ′ and e ′ are formed on the lower surface of the head.

When inserting the nest 205 into the T-shaped opening 203 of the fixed mold 201, the T of the nest 205 is inserted.
The T-shaped foot portion of the V-shaped groove portion 209 is made to be in the same direction as the T-shaped foot portion direction of the T-shaped opening portion 203 of the fixed mold 201. As a result, the T-shaped opening 203 and the nest 205
The combination of the T-shaped groove portions forms the fitting insertion groove portion 211 having a shape in which a rectangular cutout portion is formed in the long side portion of the rectangle (substantially I-shaped cross section). At this time, contact surfaces d ′ and f ′ are formed on the outer surface of the insert 205.

The degassing apparatus main body 213 of this embodiment also has a cross section of the same size and shape as the cross section of the fitting insertion groove portion 211. That is, it has a cross-sectional shape in which symmetrical notches 213b and 213c are formed on one end side of each long side of the rectangle. The notch portions 213b and 213c have contact surfaces c,
d, e, f are formed. Furthermore, this notch 213
A T-shaped end portion 213a having a T-shaped cross section, which is divided by a and 213b, is formed. This T-shaped end 213
Contact surfaces a and b are formed on the side surface of the T-shaped head of a. Also in this embodiment, since the shape and size of the cross section of the degassing apparatus main body 213 and the fitting insertion groove portion 211 are the same, the degassing apparatus main body 213 is placed inside the fitting groove portion 211 as in the first embodiment. Can be inserted.

Fitting groove portion 21 of the degassing device main body 213
The attachment / detachment to / from 1 is performed in the same manner as in the case of the first embodiment. In this embodiment, the contact surfaces a and b of the degassing apparatus main body 213 in the left-right direction (X direction in the drawing) are aligned with the contact surface a ′ of the T-shaped groove portion of the insert 205,
This is done by abutting on b '. Further, the alignment in the front-back direction (Y direction in the drawing) is performed by the degassing device main body 21.
The contact surfaces c ′, d ′, e ′, and f ′ of No. 3 are brought into contact with the contact surfaces c, d, e, and f of the nest 205.

Next, the mold structure of the fourth embodiment of the present invention will be described with reference to FIG. The mold structure of this embodiment is basically the same as the mold structure of the third embodiment, except that the contact surfaces a, b, d of the degassing apparatus main body 213 of this embodiment are different. , F and the contact surfaces a ′, b ′ of the nest 205,
As in the second embodiment, d'and f'are formed on an inclined surface having a draft. Furthermore, the contact surfaces c and e of the degassing device main body 213 and the contact surface c ′ of the insert 205,
e ′ may also be formed on an inclined surface having a draft.

In the above embodiment, each unit is detachably attached to the fixed die 101, but each unit may be attached to the movable die.

Next, regarding the take-out jig for taking out the main body of the degassing apparatus from the main body of the mold, the case where the take-out jig is applied to the first embodiment of the mold structure will be described with reference to FIGS. It will be described based on 6.

The take-out jig 129 is screwed to the take-out bolt 137 and the take-out bolt 137 inserted in the jig body 131 having an inverted U shape (gate shape). It consists of nuts 135 etc. The inverted U-shaped (gate-shaped) jig body 131 has two pillar portions 131b, 1
31c and the beam part 131a which connects these pillar parts 131b and 131c. Two pillars 131b and 131c
Are separated from each other by a distance at least longer than the width of the front-rear direction positioning projections 113a and 113b of the degassing device main body 113. A hole 131d having an inner diameter larger than the outer diameter of the threaded shaft portion 137b of the take-out bolt (bolt-shaped moving member) 137 is bored at approximately the center of the beam portion 131a.

The take-out bolt 137 comprises a head portion 137a having a hexagonal cross section and a shaft portion 137b formed integrally with the head portion 137a. The shaft portion 137b is longer than the pillar portions 131b and 131c of the jig body 131,
The end portion has a screw shape that can be screwed into an exhaust pipe mounting hole 117 formed in the degassing device body 113. Furthermore, a male screw is formed on the shaft portion 137b, and the beam portion 13
A take-out nut (bolt-shaped moving member driving means) 135 arranged on the la 1a can be screwed. Further, in this state, the shaft portion 137b is connected to the beam portion 131a of the jig body 131.
Is inserted through the hole 131d. At this time, a washer 133 is inserted between the extraction nut 135 and the beam portion 131a.

Next, the take-out operation of the degassing apparatus main body 113 using the take-out jig 129 will be described. First, the jig body 131 is attached to the pillar portions 131b, 131
It is installed on the fixed mold 101 so that c extends over the degassing apparatus main body 113. At the same time, the bolts 121 of the fixing means 119 are loosened so that the plate body 125 falls within the slot 123.
Is moved to avoid interference between the plate 125 and the degassing apparatus main body 113, and the degassing apparatus main body 113 can be taken out. Next, the take-out bolt 137 is rotated, and the tip of the shaft portion 137b is screwed into the exhaust pipe mounting hole 117 of the degassing apparatus main body 113 (FIG. 5). Then, by rotating the take-out nut 135, the take-out bolt 137 is lifted upward together with the degassing apparatus main body 113 (FIG. 6).

As described above, the tip of the shaft portion 137b of the take-out bolt 137 is attached to the exhaust pipe of the degassing apparatus main body 113.
Since it is screwed into the mounting hole 117 , the degassing device body 113 also rises as the take-out bolt 137 rises, and the degassing device body 113 can be taken out upward from the inside of the cross-shaped groove portion 111. . After that, attach the exhaust pipe to the tip of the shaft portion 137b of the take-out bolt 137.
The valve 117 , the seat, etc. in the degassing apparatus main body 113 are maintained and inspected, parts are replaced, etc.

Next, another embodiment of the take-out jig will be described with reference to FIG. Extraction jig 1 of this embodiment
Reference numeral 29 'is a degassing apparatus main body 1 using a lever member (bolt-shaped moving member driving means) 140 to which the lever principle is applied.
Take-out bolt (bolt-shaped moving member) in which the tip of the shaft portion 137b 'is screwed into the exhaust pipe mounting hole 117 of No. 13
It is configured to lift 137 '. Also in this embodiment, an inverted U-shaped jig body 1 similar to the above embodiment is used.
31 is used. Beam portion 131a of the jig body 131
A hole 131d is formed near the center of the. Similar to the first embodiment, the take-out bolt 13 is inserted into the hole 131d.
The shaft portion 137b 'of 7'is inserted. The shaft portion 137b ′ of the take-out bolt 137 ′ according to the present embodiment may be threaded only in a portion that is screwed into the exhaust pipe mounting hole 117 of the degassing device body 113.

In addition to this, in the present embodiment, a lever member 140 as a moving member driving means is used. This lever member 14
As shown in FIG. 7, 0 has an L-shaped longitudinal section, and an action end portion 140 having a function as a lever action point.
a, a force point portion 140b having a function as a force point, and a central fulcrum portion 140c having a function as a fulcrum.
Further, a take-out bolt 137 'is attached to the working end 140a.
A notch 140d through which the shaft portion 137b 'is inserted is formed. The opening width of the notch 140d is larger than the diameter of the shaft portion 137'b of the take-out bolt 137 '.
Moreover, it has a width smaller than the diameter of the head portion 137'a of the take-out bolt 137 '.

In this embodiment, the working end portion 1 of the lever member 140 is used.
40a is located between the head portion 137'a of the take-out bolt 137 'and the beam portion 131a of the jig body 131, and the take-out bolt 13 is attached to the notch 140d of the lever member 140.
The shaft portion 137'b of 7'is inserted and used.
In the lever member 140 of this embodiment, when the shaft portion 137′b of the take-out bolt 137 ′ is inserted into the cut portion 140d of the working end portion 140a in this manner, the upper surface of the working end portion 140a is taken out. It has such a size that it comes into contact with the lower surface of the head portion 137'a of the'and the fulcrum portion 140c comes into contact with the upper surface of the beam portion 131a of the jig body 131 (FIG. 7).

Next, the take-out jig 129 'of this embodiment.
The process of taking out the degassing apparatus main body 113 from the cross-shaped groove portion by using will be described. First, as in the case of the embodiment shown in FIGS. 5 and 6, the take-out jig 129 ′ is installed on the fixed mold 101 so that the jig body 131 straddles the degassing apparatus body 113. Further, the fixing of the degassing device main body 113 by the fixing means 119 is released, and the tip of the shaft portion 137′b of the take-out bolt 137 ′ is screwed into the exhaust pipe mounting hole 117 of the degassing device main body 113. next,
The notch 140d of the working end 140a of the lever member 140 is inserted into the shaft portion 137b 'of the bolt portion 137', and the force point portion 140b of the lever member 140 is pushed down in the direction of the fixed mold (the arrow direction in FIG. 7). By this pushing-down operation, the working end 140a of the lever member 140 lifts the head 137'a of the take-out bolt 137 ', and the take-out bolt 137' is lifted upward. Along with this, the degassing device main body 113 screwed into the shaft portion 137b 'of the bolt 137' is also lifted upward and taken out from the fitting recess. In addition, in the other embodiments described above, the lever member 140 is used and the take-out bolt 13
I disclosed a take-out jig for lifting 7 ',
As a device to push up the take-out bolt 137 ',
It is also possible to use a jack type. Furthermore,
In the above description, the case where the take-out jig of the present invention is used for the mold structure according to the first embodiment of the present invention has been taken as an example, but the take-out jig of the present invention is the same as the second to fourth embodiments. It is needless to say that it can also be used for the mold structure according to. Furthermore, the present invention is not limited to the examples,
Various improvements and modifications are possible within the scope of technical matters described in the claims.

[0051]

As described above, according to the mold structure of the degassing device for the injection molding machine according to the present invention, the following effects can be obtained.

First, a separate insert is provided in the fitting opening formed in the mold main body so that it can be taken out, and the degassing device main body is inserted into the fitting main body and the fitting recess defined by the core. Since it is attached so that it can be taken out freely, maintenance / inspection work such as removal of as-cast casting and replacement work of parts can be facilitated by appropriately taking out the degassing device body and the insert.

When constructing the fitting recess, for example, a T-shaped opening portion and a T-shaped groove portion are formed in the mold body and the insert, respectively, and they are constructed by combining them. The recess for fitting can be easily provided, and the mold structure can be easily manufactured.

Further, since the taper-shaped inclined surface is formed on the degassing apparatus main body and the inclined surface having an inclination angle corresponding to the inclined surface is formed on the fitting insertion recess, the degassing apparatus main body can be attached and detached more easily. Become.

Further, according to the take-out jig of the present invention, the degassing device main body can be easily removed from the fitting recess formed in the fixed mold by rotating the take-out nut or lifting the take-out bolt by the lever member. Therefore, even if casting or deformation is caused between the degassing apparatus main body and the fixed mold or the movable mold, the degassing apparatus main body can be easily taken out. Therefore, maintenance / inspection work and replacement work of the gas venting device are facilitated, and the work efficiency is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a mold structure of the present invention.

FIG. 2 is an exploded perspective view showing a second embodiment of the mold structure of the present invention.

FIG. 3 is an exploded perspective view showing a third embodiment of the mold structure of the present invention.

FIG. 4 is an exploded perspective view showing a fourth embodiment of the mold structure of the present invention.

FIG. 5 is a side view showing a first embodiment of a take-out jig of the present invention.

6 is a side view showing an operation of the take-out jig shown in FIG.

FIG. 7 is a side view showing a second embodiment of a take-out jig of the present invention.

FIG. 8 is a schematic cross-sectional view of a conventional injection molding machine.

[Explanation of symbols]

101 Fixed Mold 103 T-Shaped Opening (Opening for Fitting) 105 Nesting 109 T-Shaped Groove 111 Cross-shaped Groove (Recess for Inserting Main Body of Venting Device) 113 Venting Device Main Body 117 Exhaust Pipe Mounting Hole 119 Fixing Means 129 Removal jig 131 Jig body 135 Removal nut (bolt-shaped moving member driving means) 137 Removal bolt (bolt-shaped moving member) 140 Lever member (bolt-shaped moving member driving means)

Claims (3)

[Claims] 1. A mold for a degassing device in an injection molding machine, comprising a mold having a cavity inside, a gas vent passage for communicating the cavity with the outside air, and a shut-off means for selectively shutting off the communication. In the structure, a mold main body having a fitting opening formed therein, a shutoff means provided inside the mold main body, which is provided separately from the mold main body and has a constant outer contour, and the fitting main body. The degassing device main body fitting, which has the same outline as the external contour of the degassing device main body by being fitted into the gas opening device opening part, and in which the degassing device main body is detachably inserted Injection molding, comprising: a nest forming an insertion recess, and a fixing means for fixing the degassing device main body fitted in the degassing device main body fitting insertion recess into the recess. Gas in the machine Mold structure of the feeder apparatus. 2. At least two surfaces which are symmetrical to each other and define the outer contour of the degassing apparatus main body are formed by taper-shaped inclined surfaces, and the fitting recesses are formed so as to face the inclined surfaces. 2. The defining surface is formed by an inclined surface having an inclination angle corresponding to the inclined surface.
The mold structure of the degassing device in the described injection molding machine. 3. A mold body having a cavity and a gas vent passage for communicating the cavity with the outside air and having a fitting opening formed therein, and a blocking means for selectively blocking the communication. A gas venting device main body that is provided separately from the mold main body, has an exhaust pipe mounting hole in the upper end surface thereof, and has a constant outer contour; and by fitting the gas venting device main body into the fitting opening, A nest having a contour that is the same as the outer contour of the degassing apparatus main body in combination with the gas opening, and that forms a degassing apparatus main body fitting insertion recess into which the degassing apparatus main body is detachably inserted; With respect to the fitting recess of the mold structure of the degassing device in the injection molding machine, which has a fixing means for fixing the degassing device main body fitted in the device main body fitting recess into the recess. To take out the degassing device body Of the degassing apparatus main body, which is installed on the die main body so as to face the exhaust pipe mounting hole of the gas venting apparatus main body, and faces the exhaust pipe mounting hole of the degassing apparatus main body. A jig main body having a hole formed at a position, a head part, and a shaft end part that can be inserted into the hole part of the jig main body and screwed into the exhaust pipe mounting hole. -Shaped moving member having a shaft and an integral shaft portion, and a bolt-shaped moving member drive provided between the bolt-shaped moving member and the jig body for vertically moving the bolt-shaped moving member. The jig main body is installed on the degassing apparatus main body, and the shaft end of the bolt-shaped moving member is screwed into the screw hole of the degassing apparatus, and then the driving means is driven. Then, by moving the degassing apparatus main body in the vertical direction with respect to the jig main body, the degassing apparatus main body Degassing apparatus main body is taken out jig, characterized in that to allow extraction.