JP2011079047A - Die fitting structure, die set, and shell mold molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shell mold molding machine in which a planning change operation upon the change of a die is facilitated, further, an operation time is shortened, and further, the generation of a defective die can be prevented by preventing the generation of an accident of separating a die at an un-scheduled place or timing. <P>SOLUTION: The moving die fitting structure 14 has a constitution in which a tension pin 3a is pressed toward a moving die 2 by a press unit 3 using a coil spring 3b, and, by the reaction force, a moving connection plate 7 is extruded toward a movement extrusion plate 9, and has a spring-fitted planning set assembled with the moving die 2, the moving connection plate 7, a moving extrusion pin 7a, a moving return pin 7c and the press unit 3. Then, only when the moving extrusion plate 9 is extruded by a cylinder 15, the moving connection plate 7 extruded by the moving extrusion plate 9 is made to come close to the moving die 2, the moving extrusion pin 7a fitted to the moving connection plate 7 protrudes a tip 7b from the cavity face 2a of the moving die 2, and the die is separated from the cavity face 2a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to the production of molds used in the manufacture of castings, particularly shell mold molding, which is often used in the production of cores, and facilitates the work of replacing molds and prevents the occurrence of defective molds. The present invention relates to a mold mounting structure, a mold set, and a shell mold making machine.

In shell mold making, resin-coated sand (hereinafter simply referred to as “RCS”) is blown into a cavity of a mold set heated to a predetermined firing temperature, and a mold is manufactured by firing RCS in the mold set. Yes. The mold set is a combination of a fixed mold and a moving mold.
Both the fixed mold and the movable mold constitute part of the mold mounting structure. The conventional mold mounting structure has a mold mounted on a die plate and a connecting plate provided between the mold and the die plate. It was. Further, an extrusion plate is provided between the connection plate and the die plate, the connection plate and the extrusion plate are fastened with bolts, and the connection plate is moved by pushing and pulling the extrusion plate.
In addition, when an extruding pin is attached to the connecting plate and the connecting plate is brought close to the mold, the extruding pin penetrates the die and projects its tip from the cavity surface, and the mold is pushed by the extruding pin and separated from the cavity surface. I was trying to do it. Further, when a return pin having a head is attached to the connection plate and the connection plate is brought close to the mold, the return pin penetrates the mold and protrudes the head from the mating surface of the mold. On the other hand, when the connecting plate is moved away from the mold, the head of the return pin is placed in a recess provided on the mating surface of the mold.
When the mold set is configured, the head of the return pin is pushed by the mating surface of the counterpart mold, and the connecting plate is positioned at the position where the head of the return pin is pushed into the recess ( (Hereinafter referred to simply as “pushing position determination state”), and in the pressing position determination state, the tip of the extrusion pin coincides with the cavity surface of the mold, and the surface of the tip of the extrusion pin corresponds to the cavity surface of the mold. I was trying to make a part of it.
In the conventional mold mounting structure as described above, when the mold to be manufactured is changed to a set in which the extrusion pin, the return pin, and the connecting plate are previously mounted on the mold (hereinafter simply referred to as “setup set”). Took the work of removing the set-up of the used mold and attaching the set-up of the mold to be used next (hereinafter simply referred to as “setup change work”).

In the conventional setup change work, after the mold of the setup set is bolted to the die plate and attached, the hand is put in the narrow gap between the extrusion plate and the die plate, from the extrusion plate side toward the connecting plate. Bolts were inserted and the connecting plate was fastened to the extruded plate by bolting.
However, the conventional bolting operation to fasten the connecting plate and the extrusion plate is a difficult task of inserting a hand into a narrow space and tightening a large number of bolts, and the setup change operation. Since the time required is excessive, there is a problem of reducing the operating rate of the shell mold molding machine.
Furthermore, even if the bolts that fasten the connecting plate and the extrusion plate are strongly tightened, when many molds are produced, there is a problem that the bolts loosen with time. If the bolts that fasten the connecting plate and the extrusion plate are loosened, the extrusion pin protrudes from the cavity surface while the mold moves, causing an accident that pushes the mold at an unplanned location and timing. There was a problem that the dropped mold became a defective product.
In particular, in a shell mold making machine where the moving mold is turned over and the moving mating surface is directed downward in the direction of gravity, the connecting plate moves due to its own weight when the bolt that fastens the connecting plate and the extrusion plate is loosened. As a result, an accident occurred in which the mold fell away from the moving mold before the extruding pin pushed the mold and the moving mating surface completely turned downward.
In addition, when searching for keywords in the patent digital library using the keywords “shell mold”, “mold” and “spring”, the upper main mold and the lower main mold were selected from the upper mold and the lower mold. Although there was an invention of a sand casting apparatus for tilt casting that is supported by a spring (see, for example, Patent Document 1), it is considered that the invention is completely different from the present invention.

JP 2004-34080 A

  The purpose of the present invention is to facilitate setup change work when changing the mold to be manufactured, shorten the time required for setup change work, improve the operating rate of the shell mold molding machine, and do not plan The purpose is to prevent the occurrence of a defective mold by preventing the occurrence of an accident of pushing out the mold at a place or timing.

  The connecting plate is pushed toward the extrusion plate by a spring or a pushing unit using a spring (hereinafter simply referred to as “spring etc.”), and the pushing plate is pushed by the pushing plate only when the pushing plate is forcibly pushed by the push-pull mechanism. The connected connecting plate approaches the mold, the extrusion pin attached to the connecting plate protrudes from the cavity surface of the mold, and the mold is separated from the cavity surface.

Since the connecting plate is pushed toward the extrusion plate by a spring, etc., even if the die is turned over and the mating surface is directed downward in the direction of gravity, the extrusion pin does not protrude from the cavity surface, but at a predetermined position. The mold is not separated from the mold at a position other than the above and at a timing other than the predetermined timing, and generation of a defective mold can be prevented.
Because it is a set in which a mold, a connecting plate, an extrusion pin, a return pin, a spring, and the like are attached in advance (hereinafter simply referred to as “a setup with spring”), and the setup with a spring is attached to the die plate, The difficult task of putting a hand in a small space and inserting and tightening a large number of bolts is unnecessary, and the setup change work becomes easier. Furthermore, the time required for the setup change work was shortened, and the operating rate of the shell mold molding machine could be improved.

It is sectional drawing of the state which left | separated the fixed mold attachment structure and the moving mold attachment structure. It is sectional drawing of the state which comprised the metal mold | die set. It is sectional drawing of a moving mold attachment structure.

A die is attached to the die plate, a connecting plate is provided between the die and the die plate, an extrusion pin and a return pin are attached to the connecting plate, and the extrusion pin can penetrate the die and protrude its tip from the cavity surface The return pin has a head, and the return pin penetrates the mold so that the head can be taken out from the mating surface.
The length of the return pin, the length of the extrusion pin, and the shape of the tip surface differ depending on the size of the mold and the position and shape of the cavity, and the position and number of the return pins and extrusion pins are also different. Therefore, it is preferable to prepare a combination of a return pin, an extrusion pin, and a connecting plate for each mold.
Further, an extrusion plate is provided between the connection plate and the die plate, and a push-pull mechanism for pushing and pulling the extrusion plate is provided, and a die mounting structure in which the connection plate is pushed toward the mold by the extrusion plate. As the push-pull mechanism, a cylinder such as a hydraulic cylinder, a hydraulic cylinder, or a pneumatic cylinder can be used, or an electric cylinder or a ball screw can be used.
In addition, the connecting plate is configured to push the connecting plate toward the extrusion plate by a spring, and the connecting plate is positioned by the head portion of the return pin being stopped by the mating surface of the mold or the bottom surface of the recess provided in the mating surface (hereinafter referred to as the positioning plate). It is simply referred to as the “stop position determination state”.) In the stop position determination state, the end of the extrusion pin coincides with the cavity surface of the mold, and the end surface of the extrusion pin is a part of the cavity surface of the mold. It is set as the metal mold | die mounting structure which comprised these.

Although there is a configuration in which a spring is provided between the connection plate and the extrusion plate, it is preferable to provide a spring between the mold and the connection plate because a simple configuration is obtained. As the spring, a coil spring, a leaf spring, a disc spring, or the like can be used, and the type of the spring is not particular. A plurality of springs are provided, and 4 to 12 springs are particularly suitable.
A recess for accommodating the head of the return pin is provided on the mating surface of the mold. In many cases, a depression is provided in the mold on the side where the return pin is attached, but it is also possible to provide a depression on the other side constituting the mold set. If a recess is provided on the other side, the head of the return pin is stopped by the mating surface of the mold on your side so that it is in the stop position position, and if a recess is provided on your own mold, the recess It is only necessary that the head of the return pin is stopped by the bottom surface of the lens so that it reaches the stop position determination state position.
Then, by pushing the extrusion plate toward the mold by the push-pull mechanism, the connecting plate pushed by the extrusion plate approaches the mold, and the tip of the extrusion pin protrudes from the cavity surface of the mold, and the mold is removed from the mold. Separate and allow the mold to be removed from the mold.
With the above configuration, when changing the mold to be manufactured with the push / pull plate always attached to the die plate together with the push / pull mechanism, the die, the return pin, the push pin, the connecting plate, and the spring attached are attached. By preparing a setup set and replacing the spring-loaded setup set together, the setup change work can be performed.

A moving die is attached to the moving die plate, a moving connecting plate is provided between the moving die and the moving die plate, a moving extruding pin and a moving return pin are attached to the moving connecting plate, and the moving extruding pin penetrates the moving die. A configuration in which the tip can be taken out from the cavity surface, the movable return pin has a head, and the movable return pin penetrates the movable mold and the configuration in which the head can be taken out from the movable mating surface To do.
In addition, a moving extrusion plate is provided between the moving connecting plate and the moving die plate, a push-pull mechanism for pushing and pulling the moving extruding plate is further provided, and the moving connecting plate is pushed toward the moving mold by the moving push plate. A moving mold mounting structure is adopted.
Then, the moving connecting plate is configured to push the moving connecting plate toward the moving pushing plate by a spring, and the moving connecting plate is stopped by the bottom surface of the moving mating surface or the depression provided in the moving mating surface. In the fixed position, the tip of the moving push pin coincides with the cavity surface of the moving mold, and the tip surface of the moving push pin forms a part of the cavity surface of the moving die. A moving mold mounting structure is adopted.
The invention of this paragraph represents the mold mounting structure described in paragraphs 0009 and 0010 as a moving mold mounting structure. This is because the present invention can be used also when a fixed mold is attached, but is particularly useful when a moving mold is attached.

In the above-described mold mounting structure or moving mold mounting structure, a pressing unit incorporating a spring is provided, and the connecting plate or the moving connecting plate is pushed toward the extruded plate or the moving extruded plate by the pressing unit. It is preferable to provide a plurality of pressing units, particularly 4 to 12 sets.
The pushing unit includes a coil spring, a case that houses the coil spring, and a projecting pin that is pushed by the coil spring toward the mold or the moving mold. A mold mounting structure or a moving mold mounting structure is adopted that protrudes toward the mold.
It is also preferable to insert a heat insulating material between the mold and the spring, attach a spring between the heat insulating material and the connecting plate, and press the connecting plate directly with the spring, but by providing a tension pin and pressing the mold with the tension pin, The structure in which the connecting plate is pushed toward the extrusion plate by the reaction force is preferable because the amount of heat transmitted from the heated mold to the coil spring is reduced, and the spring rope is not altered by heat.

A mold set is formed by combining a movable mold mounting structure and a fixed mold mounting structure. The fixed die mounting structure has a fixed die attached to a fixed die plate, a fixed connecting plate provided between the fixed die and the fixed die plate, a fixed push pin and a fixed return pin attached to the fixed connecting plate. The fixed push-out pin and the fixed return pin are attached through the fixed mold.
In addition, a spring that pushes the fixed connecting plate toward the fixed mold is provided, and in a free state, the fixed push pin protrudes from the cavity surface of the fixed mold, and the fixed return pin pushes its head from the fixed mating surface. Shall stick out.
And when the fixed mating surface of the fixed mold and the moving mating surface of the moving mold are combined to form a mold set, the head of the fixed return pin is moved by the bottom surface of the moving mating surface or the depression provided in the moving mating surface. When pressed, the fixed connecting plate is in a pressed position determination state, and in the pressed position determination state, the tip of the fixed push pin coincides with the cavity surface of the fixed mold, and the fixed push pin The movable die mounting structure is such that the front end surface of the metal plate constitutes a part of the cavity surface of the fixed die.
In the fixed mold, the connecting plate is always pushed toward the mold by a spring, and when the moving mold leaves the fixed mold after the mold is baked, the head of the fixed return pin moves to the moving mating surface or moving mating surface. The fixed return pin moves with the movement of the movable mold while in contact with the bottom surface of the recess provided on the surface, and with the movement of the fixed return pin, the tip of the fixed push pin protrudes from the cavity surface, and the mold is moved to the fixed mold. It is configured to be separated from the cavity surface.

The above-mentioned mold set is provided, a guide shaft and a guide attached to the guide shaft are further provided, the moving die plate is attached to the guide, and the moving die plate is configured to be slidable on the guide shaft. A mold set with a slide mechanism provided with a slide drive unit for sliding movement is provided.
In addition, a bearing part is provided between the moving die plate and the guide, and the moving mold mounting structure is turned 90 degrees around the bearing part, and the moving mating surface of the moving mold can be directed downward in the direction of gravity. A die set with a falling mechanism is used.
In addition, a reversing device for vertically reversing the mold set is provided, and a mold set with a reversing mechanism configured to be able to collect unnecessary RCS in the mold set.
Further, a blower for blowing RCS into the cavity of the mold set, an RCS supply device for supplying RCS to the blower, and heating for heating the fixed mold and the moving mold in order to fire the RCS in the mold set A shell mold molding machine having a mechanism is provided.
The invention described in this paragraph includes a mold set described in paragraph 0013, a known slide mechanism, a known tipping mechanism, a known reversing mechanism, a known blowing device, a known RCS supply device, and a known heating mechanism. It is a combined invention.

A first embodiment of the present invention will be described below with reference to FIGS. The mold set 11 according to the first embodiment includes a fixed mold mounting structure 12 and a movable mold mounting structure 14. The fixed die attachment structure 12 is attached between the fixed die plate 4, the fixed die 1 attached to the bracket 4 a of the fixed die plate 4 by bolting, and the fixed die plate 4 and the fixed die 1. The fixed connection plate 6 and the fixed extrusion plate 8 are provided.
The mounting block 8c is inserted between the fixed connection plate 6 and the fixed extrusion plate 8, and the fixed connection plate 6 and the fixed extrusion plate 8 are bolted to be integrated. Also, a slide pin 8a and a spring 8b are provided between the fixed die plate 4 and the fixed push plate 8, and the slide pin 8a is pushed toward the fixed mold 1 by the spring 8b, and the slide pin 8a is stopped by the stopper 8d. It was.
A plurality of fixed push-out pins 6a and four fixed return pins 6c are attached to the fixed connection plate 6 through the fixed mold 1, respectively, and a recess in which the head 6d of the fixed return pin 6c is accommodated on the fixed mating surface 1b. 1c was provided.
In the free state shown in FIG. 1, the fixed pusher plate 8 is pushed by the fixed spring 8b via the slide pin 8a, and the fixed connecting plate 6 is at a predetermined position closest to the fixed mold 1, At the position, the fixed push pin 6a protrudes its tip 6b from the cavity surface 1a, and the fixed return pin 6c protrudes the head 6d from the fixed mating surface 1b.
When the mold set 11 shown in FIG. 2 is configured, the head 6d of the fixed return pin 6c is pushed by the moving mating surface 2b of the movable mold 2 and is placed in the recess 1c, and the fixed connecting plate 6 is positioned. Thus, the pressing position is determined, and the tip 6b of the fixed push pin 6a coincides with the cavity surface 1a, and the surface of the tip 6b of the fixed push pin 6a constitutes a part of the cavity surface 1a.

The moving mold mounting structure 14 is mounted between the moving die plate 5, the moving mold 2 attached to the bracket 5 a of the moving die plate 5 by bolting, and the moving die plate 5 and the moving mold 2. The movable connecting plate 7 and the movable extrusion plate 9 are provided.
A push block 7e is attached to the movable connecting plate 7 on the movable push plate 9 side, and the push block 7e and the movable push plate 9 are not coupled.
Six sets of push units 3 were provided between the moving mold 2 and the moving connecting plate 7. The pushing unit 3 is composed of a coil spring 3b placed in a case 3c and a projecting pin 3a pushed toward the moving mold 2 by the coil spring 3b, and a retaining ring 3d is attached so that the projecting pin 3a does not come off. .
The movable connecting plate 7 is provided with a plurality of movable push pins 7a and movable return pins 7c, penetrating the movable mold 2 respectively, and the movable mating surface 2b is provided with a recess 2c in which the head 7d of the movable return pin 7c is received. It was.
In addition, it is assumed that a push-pull mechanism composed of a cylinder 15 is provided to push and pull the movable push plate 9, and when the movable push plate 9 is pulled by the cylinder 15 as shown in FIGS. Separated from the block 7e, a gap was formed between them.
The projecting pin 3a is pushed toward the moving mold 2 by the coil spring 3b, and the moving connecting plate 7 is pushed toward the moving push plate 9 by the reaction force. When the cylinder 15 is pulled, the head portion 7d of the moving return pin 7c is stopped on the bottom surface of the recess 2c of the moving mold 2, and the moving connecting plate 7 is positioned to be in the stop position determination state. At this time, the tip 7b of the moving push pin 7a coincides with the cavity surface 2a, and the surface of the tip 7b of the move push pin 7a constitutes a part of the cavity surface 2a.
On the other hand, when the movable push plate 9 is pushed by the cylinder 15 as shown in FIG. 3, the movable push plate 9 pushes the push block 7e, and the pushed movable connecting plate 7 shrinks the coil spring 3b while moving the movable mold 2. To approach. At this time, the moving push pin 7a protrudes its tip 7b from the cavity surface 2a, and the moving return pin 7c protrudes the head 7d from the moving mating surface 2b.

In the moving mold mounting structure 14, the projecting pin 3 a is pushed toward the moving mold 2 by the coil spring 3 b of the pushing unit 3, and the moving connecting plate 7 is pushed toward the moving push plate 9 by the reaction force. Therefore, even if the moving mold 2 is turned over 90 degrees and the moving mating surface 2b is directed downward in the direction of gravity, the moving connecting plate 7 does not move, and the moving push pin 7a does not protrude the tip 7b from the cavity surface 2a. .
For this reason, it is possible to always separate the mold from the mold by pushing the movable extrusion plate 9 by the cylinder 15 at a predetermined position and at a predetermined timing. The mold is no longer separated from the mold at a timing that is not, and the accident that the mold falls and a defective mold occurs can be prevented.
In the moving mold mounting structure 14, the moving push pin 7 a is attached to the moving connecting plate 7, the push unit 3 is inserted into the hole of the moving connecting plate 7, and the moving push pin 7 a is inserted into the moving die 2. A spring set-up set is prepared for each mold by inserting the movable return pin 7c into the movable mold 2 from the movable mating surface 2b side and attaching the movable return pin 7c to the movable connecting plate 7.
In the setup change work when changing the mold to be manufactured, the setup set with spring to be used next is performed after removing the setup set with spring used before the change. In the moving mold mounting structure 14, the setup set with a spring is attached to the moving die plate 5 only by the fastening bolt 5 b that is bolted between the moving mold 2 and the bracket 5 a of the moving die plate 5. After the bolt 5b is loosened once and the spring-loaded setup set is replaced, the fastening bolt 5b is tightened again.
For this reason, it is a conventional operation to loosen or tighten the bolts for fastening the connecting plate and the extrusion plate, and it is difficult to loosen or tighten many bolts by inserting a hand into a narrow space. No need to do work. Furthermore, since the time required for the setup change work could be shortened, the operating rate of the shell mold molding machine could be improved.

A shell mold molding machine having the mold set 11 of Example 1 will be described as Example 2. In the shell mold making machine of Example 2, the guide shaft 17 and the guide 18 attached to the guide shaft 17 were provided, and the movable die plate 5 was attached to the guide 18.
In this way, the movable die mounting structure 14 together with the movable die plate 5 is configured to be slidable on the guide shaft 17, and a slide drive mechanism (not shown) for driving the movable die plate 5 is provided.
Further, a bearing portion 16 is provided between the movable die plate 5 and the guide 18, and the movable mold mounting structure 14 is turned 90 degrees around the bearing portion 16, so that the movable mating surface 2 b and the cavity surface of the movable mold 2 are tilted. From the state of FIGS. 1 and 2 with 2a facing in the horizontal direction, a tipping mechanism (not shown) is provided to turn the moving mating surface 2b and the cavity surface 2a downward in the direction of gravity.
In addition, an upside down device (not shown) for turning the mold set 11 upside down is provided, and an unnecessary RCS in the RCS blown into the cavity of the mold set 11 is dropped and collected in a collection hopper. did.
Further, a blower (not shown) for blowing RCS into the cavity of the mold set 11, an RCS supply device (not shown) for supplying RCS to the blower, and a burner 10a for jetting combustible gas are attached, and the combustible gas burns. A shell mold making machine provided with a heating mechanism for heating the fixed mold 1 and the movable mold 2 by the flame 10b was obtained.

In the shell mold making machine of Example 2, the fixed mold 1 and the movable mold 2 are heated to a predetermined temperature by a heating mechanism in advance, and the RCS is blown into the cavity of the mold set 11 shown in FIG. Infuse. Thereafter, a firing step is performed to fire the RCS in the mold set 11. Further, the mold set 11 is inverted by the upside down device in the middle of the combustion process, and unnecessary RCS is dropped and collected in the collection hopper.
When the moving mold mounting structure 14 is slid following the firing step to open the mold set 11, the head 6d of the fixed return pin 6c moves away from the fixed mating surface 1b as the moving mating surface 2b moves away from the fixed mating surface 1b. At the same time, the tip 6b of the fixed push pin 6a protrudes from the cavity surface 1a, and the mold is separated from the cavity surface 1a by pushing out the mold.
The mold slides together with the movable mold 2 in contact with the cavity surface 2a, and the movable mold mounting structure 14 is in the state shown in FIG. As shown in FIGS. 1 and 2, since the movable extrusion plate 9 is pulled by the cylinder 15, the movable extrusion pin 7a does not protrude its tip 7b from the cavity surface 2a.
Thereafter, the moving mold mounting structure 14 is turned 90 degrees by the turning mechanism, the moving mating surface 2b and the cavity surface 2a of the moving mold 2 are directed downward in the gravity direction, and the moving push plate 9 is pushed by the cylinder 15. . Since the movable pushing plate 9 contacts the pushing block 7e and pushes the pushing block 7e, the moving connecting plate 7 approaches the moving mold 2 while compressing the coil spring 3b. Then, with the movement of the movable connecting plate 7, the tip 7b of the movable push pin 7a protrudes from the cavity surface 2a and is in the state shown in FIG. At this time, since the tip 7b of the moving push pin 7a pushes out the mold, the mold is separated from the cavity surface 2a.
After the mold is taken out, the moving mold mounting structure 14 is reversed 90 degrees by the overturning mechanism, and the movable extrusion plate 9 is pulled back to the state shown in FIG. 1 by the cylinder 15 to attach the moving mold mounting structure 14 to the fixed mold mounting. The mold set 11 is configured by sliding toward the structure 12.

  The present invention is used not only in an industry for manufacturing a core, a main mold and the like using a shell mold molding method but also in an industry for manufacturing and selling a shell mold molding machine.

DESCRIPTION OF SYMBOLS 1: Fixed metal mold | die 1a: Cavity surface 1b: Fixed mating surface 1c: Depression 2: Moving mold 2a: Cavity surface 2b: Moving mating surface 2c: Depression 3: Push unit 3a: Stretching pin 3b: Coil spring 3c: Case 3d : Retaining ring 4: Fixed die plate 4a: Bracket 5: Moving die plate 5a: Bracket 5b: Fastening bolt 6: Fixed connecting plate 6a: Fixed pushing pin 6b: Tip 6c: Fixed return pin 6d: Head 7: Moving connecting plate 7a: Move push pin 7b: Tip 7c: Move return pin 7d: Head 7e: Push block 8: Fixed push plate 8a: Slide pin 8b: Spring 8c: Mounting block 8d: Stopper 9: Move push plate 10a: Burner 10b: Flame 11: Mold set 12: Fixed mold mounting structure 14: Moving mold mounting structure 15: Cylinder 16: Bearing portion 17: Guide Shift 18: A Guide

Claims (9)

A die is attached to the die plate, a connecting plate is provided between the die and the die plate, and an extruding pin and a return pin are attached to the connecting plate. The extruding pin penetrates the die and extends from the cavity surface to the tip. The return pin has a head, and the head can be taken out from the mating surface through the mold.
Further, an extrusion plate is provided between the connection plate and the die plate, a push-pull mechanism for pushing and pulling the extrusion plate is further provided, and the connection plate is pushed toward the die by the extrusion plate. In the mold mounting structure,
The connecting plate is configured to push the connecting plate toward the extrusion plate by a spring, and the connecting plate is positioned at a position where the head portion of the return pin is stopped by the mating surface or a bottom surface of a recess provided in the mating surface. In this stop position state, the tip surface of the push pin constitutes a part of the cavity surface of the mold. The mold mounting structure according to claim 1, wherein The mold mounting structure according to claim 1, wherein a pressing unit incorporating a spring is provided, and the connecting plate is pushed toward the extrusion plate by the pressing unit,
The pushing unit includes a coil spring, a case that houses the coil spring, and a projecting pin that is pushed toward the mold by the coil spring, and the projecting pin has one end portion extending from the case to the mold. The mold mounting structure according to claim 1, wherein the mold mounting structure is configured to protrude toward the surface. A moving mold is attached to the moving die plate, a moving connecting plate is provided between the moving mold and the moving die plate, a moving push pin and a moving return pin are attached to the moving connecting plate, and the moving push pin is connected to the moving die. It is configured that the tip can be taken out from the cavity surface through the mold, the moving return pin has a head, and the head can be taken out from the moving mating surface through the moving mold. Possible configurations,
Further, a movable push plate is provided between the movable connecting plate and the movable die plate, and a push / pull mechanism for pushing and pulling the movable push plate is further provided. The movable push plate is used to move the movable connecting plate to the movable mold. In the moving mold mounting structure configured to push toward the
The moving connecting plate is configured to push the moving connecting plate toward the moving pushing plate by a spring, and the head of the moving return pin is stopped by the moving mating surface or the bottom surface of the depression provided in the moving mating surface. The movable connecting plate is in a stop position determination state, and the tip surface of the movable push pin in the stop position determination state constitutes a part of the cavity surface of the moving mold. The moving mold mounting structure. The moving mold mounting structure according to claim 3, wherein a pressing unit incorporating a spring is provided, and the moving connecting plate is pushed toward the moving extrusion plate by the pressing unit,
The pushing unit includes a coil spring, a case that houses the coil spring, and a projecting pin that is pushed toward the moving mold by the coil spring, and the projecting pin moves one end from the case to the moving The moving mold mounting structure according to claim 1, wherein the structure is configured to project toward the mold. A mold set comprising a combination of the movable mold mounting structure and the fixed mold mounting structure according to claim 3,
The fixed mold mounting structure includes a fixed mold attached to a fixed die plate, a fixed connection plate provided between the fixed mold and the fixed die plate, a fixed push pin attached to the fixed connection plate, and a fixed return. It shall have a pin, and the fixed push pin and the fixed return pin shall each penetrate the fixed mold,
A spring that pushes the fixed connecting plate toward the fixed mold is provided. In a free state, the fixed push pin protrudes from the cavity surface of the fixed mold, and the fixed return pin is the fixed mold. The head should protrude from the fixed face of
When the fixed mating surface of the fixed mold and the moving mating surface of the moving mold are combined to form a mold set, the fixed pin is moved by the moving mating surface or the bottom surface of the recess provided in the moving mating surface. When the head is pressed, the fixed connecting plate is positioned (hereinafter, simply referred to as “pushing position determination state”). The mold set is the fixed mold mounting structure which constitutes a part of the cavity surface of the fixed mold.   6. The mold set according to claim 5, further comprising a guide shaft and a guide attached to the guide shaft, and the movable die plate is slidable on the guide shaft by attaching the movable die plate to the guide. A mold set with a slide mechanism, further comprising a slide drive unit for slidingly moving the movable die plate.   7. A mold set with a slide mechanism according to claim 6, wherein a bearing portion is provided between the movable die plate and the guide, and the movable mold mounting structure is turned 90 degrees around the bearing portion to move the movable die. A die set with a tipping mechanism that allows the moving mating surface of the mold to be directed downward in the direction of gravity.   8. The mold set according to claim 6, further comprising an upside down device that flips the mold set upside down, and an unnecessary resin-coated sand (hereinafter simply referred to as “RCS”) in the mold set. ”). A mold set with a reversing mechanism that can be collected.   Among the mold sets having the mold set according to any one of claims 6 to 8, further blowing an RCS into a cavity of the mold set, an RCS supply apparatus supplying the RCS to the blow apparatus, and the mold set A shell mold making machine having a heating mechanism for heating a stationary mold and a moving mold in order to fire the RCS.

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