JPH08332549A - Setscrew type die separating device - Google Patents

Abstract

PURPOSE: To enable the separation of dies by screwing in a small amount of pushing bolts, by providing slits for vertically penetrating an upper die and guiding the pushing bolts and holes for inserting nuts from side parts under the condition when the screw holes are along the slits. CONSTITUTION: The slits 10 for vertically penetrating the upper die 1 and guiding the pushing bolts 3 are formed and the insert holes 11 for inserting split nuts 4 from the side parts under the condition where the screw holes of the split nuts 4 are along the slits 10. The split nut 4 is composed of the split nut composed of two divided dies 41, 42 at the right and the left parts connected with a hinge pin. The two divided dies 41, 42 are opened and set so that the tip part of the pushing bolt 3 becomes the small projecting condition from the split nut 4, and the split nut 4 is inserted into the push-in hole 11. Separation of the upper die 1 can be executed by screwing the pushing bolts 3 into the nuts 4 by a necessary sizes to a gap between the tip part of the pushing bolts 3 and a lower die 2 and to the float-up of the upper die 1. The number of turnings of the screw of the pushing bolt 3 is made to extremely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a push-bolt type mold separating device for separating upper and lower molds by a push bolt. More specifically, the present invention provides a plurality of push bolts, such as when separating a finished mold and a model after filling a space composed of the model and the mold with sand, gypsum slurry or other mold material. The present invention relates to a mold separating device suitable for separating the lower mold from the lower mold by arranging the upper mold at a proper position and screwing each of the push bolts to cause the upper mold to float substantially uniformly throughout.

[0002]

2. Description of the Related Art Conventionally, for example, when manufacturing a mold, a mold separating apparatus as shown in FIG. 4 has been used to separate the model from the mold when the model is removed without damaging the completed mold. In FIG. 4, reference numeral 20 denotes a mold obtained by filling and molding a mold material such as sand or gypsum slurry into the space between the mold (lower mold) 2 and the upper mold 1, and at the time of filling the mold material,
The state is upside down from the state of FIG.

When the mold 20 is completed, it is reversed to the state shown in the figure, and the model 1 is separated from the mold 2 by the four push bolts 3 as follows. Since the upper and lower molds 1 and 2 are rectangular in plan view, the model 1 is formed with female screws 12 penetrating in the vertical direction near each corner, and the push bolt 3 is screwed into each female screw 12. Has been. Each push bolt 3
If they are screwed into the respective female screws 12 until their tips come into contact with the upper surface of the mold 2, by screwing each push bolt 3 into the female screws 12 as evenly as possible,
The model 1 is floated from the mold 2 so as to be almost uniform as a whole, and the model 1 is separated from the mold 2 and the mold 20.

When the model 1 is repeatedly used, the push bolts 3 are unscrewed from the female screw 12 of the model 1 and removed, and the model 1 is turned upside down and the mold 2 is placed on the inside. Fill with mold material. Further, since the push bolts 3 are commonly used for models having female screws of the same screw size, when there are models of the same screw dimensions, the push bolts 3 are unscrewed after the mold separation and the female screws are Remove from 12.

[0005]

According to the above-mentioned conventional apparatus, when the mold is separated, the push bolt 3 is formed by the sum of the thickness of the model 1 and the required separation amount of the model 1 with respect to the mold 2. There was a problem of having to screw in and unscrew. The time required to screw in and unscrew the push bolt 3 becomes longer as the frequency of mold manufacturing operations increases. An object of the present invention is to manufacture a mold, for other purposes, by using a push bolt to separate the upper mold from the lower mold by almost uniformly levitating the mold as a whole in a much shorter time than a conventional separating device. It is an object of the present invention to provide a mold separating device capable of screwing or unscrewing a necessary working amount.

[0006]

The mold separating apparatus according to the present invention is configured as follows in order to achieve the above-mentioned object. That is, the mold separating apparatus according to the invention of claim 1 is the push-screw type mold separating apparatus as described above, wherein each nut 4 having a screw hole 40 adapted to each push bolt 3 and the proper position of the upper mold 1 are provided. In addition, the slits 10 formed so as to penetrate the upper mold 1 in the vertical direction and guide the push bolts 3 from the side in a vertical posture, and the slits 10 of the upper mold 1 are formed. Each of the insertion holes 11 formed in such a state that the nut 4 can be inserted from the side with the screw hole 40 along the slit 10.
It has and. The required number of the push bolts 3 varies depending on the planar shapes and sizes of the molds 1 and 2, but at least three are required to make the upper mold 1 as a whole evenly float above the lower mold 2.

A mold separating apparatus according to a second aspect of the present invention is the mold separating apparatus according to the first aspect, wherein the nut 4 has left and right halves 41, one end of which is connected by a hinge pin 43.
It is composed of a split nut 42.

[0008]

According to the mold separating apparatus of the first aspect, the push bolts 3 are screwed into the screw holes 40 of the nuts 4 so that the tips of the nuts 4 are slightly projected. The push bolts 3 are guided to the slits 10 from the side of the upper mold 1 while being inserted into the slits 11. In this state, since the tips of the push bolts 3 are close to the upper surface of the lower mold 2, the amount corresponding to the gap between the tips of the push bolts 3 and the upper surface of the lower die 2 and the upper die The upper mold 1 is separated from the lower mold 2 by screwing the push bolts 3 into the nuts 4 by the amount required to float the required amount of 1 above. Therefore, the number of times the push bolt 3 is screwed when the upper die 1 is levitated by a required amount is much smaller than that in the conventional die separating device, and the time required for repeated use of the upper and lower dies 1 and 2 is small. It becomes extremely short.

Push bolt 3 from upper mold 1 separated from lower mold 2
When removing, the push bolts 3 together with the nuts 4 may be moved laterally of the upper mold 1 until the push bolts 3 come out of the slits 10. When each push bolt 3 is reused, the nut 4 may be unscrewed until the tip of the push bolt 3 slightly projects from the nut 4. Compared to the conventional device in which the push bolt 3 is unscrewed from the female screw 12 of the upper die 1, the number of times the nut 4 is screwed is much smaller, and the push bolt 3 is screwed. By screwing 4 onto the push bolt 3, the latter is much faster and easier, so that the push bolt 3 can be reusable in a much shorter time.

According to the mold separating apparatus of the second aspect, the nut 4 is composed of a split nut composed of left and right split molds 41 and 42, one end of which is connected by a hinge pin 43. By opening and closing the molds 41 and 42 around the hinge pin 43, the nut 4 can be easily removed from the push bolt 3, or the nut 4 can be easily removed.
Can be attached to a desired position of the push bolt 3.
Therefore, the time required to reuse the push bolt 3 and the upper and lower molds 1 and 2 is further shortened.

In the mold separating device according to each of the claims, the tip end portion of the nut 4 in the insertion direction is moved forward in the tip end direction so that the nut 4 can be smoothly inserted when being inserted into the insertion hole 11. It is preferable to form the tapered surface so as to have a downward shape.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the mold separating apparatus according to the present invention will be described with reference to FIGS. 1 and 2 illustrate the nut 4 used in the mold separating apparatus of this embodiment.

The nut 4 is divided into left and right halves 41, 42.
A split nut composed of a split mold 41,
42 is configured to be separated from the center of the screw hole 40 to the left and right. A push bolt 3 shown in FIG. 3, which will be described later, is screwed into the screw hole 40. A groove-shaped portion 41a is formed on the base end surface of one split mold 41, and a portion of the groove-shaped portion 41a connected to another split mold 42 is
A planar semi-circular arc-shaped connecting portion 41b is formed. A ridge portion 42a is formed on the base end surface of the other split die 42 so as to correspond to the groove portion 41a, and a flat half is formed in a portion of the ridge portion 42a connected to the other split die 41. An arcuate connecting portion 42b is formed.

The two halves 41 and 42 are provided with the groove portion 41a.
The connecting portion 41b, which is a part of the ridge, is overlapped with the connecting portion 42b, which is a part of the ridge 41a, is inserted. The overlapped connecting portions 41b, 42b are caulked. The hinge pins 43 interconnect each other. Therefore, the split molds 41 and 42 are moved from the use state in which they are closed as shown in FIG. 1 to each other as shown in FIG.
It can be opened to a strong 0 °. Split mold 41,
42 tip (tip in the direction of insertion into the insertion hole 11)
As shown in FIG. 2, other portions except the bottom portion are formed on the tapered surfaces 41c and 42c which are inclined downward.

FIG. 3 shows a model (upper mold) similar to FIG.
1 shows a state in which a mold (lower mold) 2 is overlaid, and a mold (not shown) similar to that in FIG. 4 is formed inside the mold 2.

In the vicinity of each corner of the rectangular model 1 which is the upper mold, the model 1 is vertically penetrated and the push bolt 3 can be guided from the side in a vertical posture. The slit 10 is formed. In the portion where the slits 10 of the upper die 1 are formed, the insertion holes 11 are formed so that the nuts 4 can be inserted from the side with the screw holes 40 of the nuts 4 along the slits 10. Are formed. It is preferable that the insertion hole 11 is formed at a position as close as possible to the bottom surface of the upper mold 1 within a range allowable for strength.

When the model 1 is floated and separated from the mold 2 by the mold separating device of this embodiment, the push bolts 3 are attached to the push bolts 3 so that the tips of the push bolts 3 are slightly projected from the nuts 4. Attach nuts 4 respectively. In this state, as shown in FIG. 3, each push bolt 3 is pushed from the side of the model 1.
Are guided to the respective slits 10 and, at the same time, the nuts 4 are inserted into the respective insertion holes 11. Then, the push bolts 3 are screwed little by little so that the downward projection amounts thereof are substantially uniform, so that the lower part of the model 1 is removed from the unillustrated mold (reference numeral 3 in FIG. 4) in the mold frame 2. The model 1 is lifted almost uniformly from the mold 2 until it completely floats and separates, and the model 1 is separated from the mold 2. When the push bolt 3 is reused for separation of other molds, if the push bolt 3 is pulled out from the sill 10 to the side of the model 1, the nut 4 follows the insertion hole 1 as well.
The two halves 41 and 42 open and come off the push bolt 3.

According to the mold separating apparatus of this embodiment, the model 1
When setting each push bolt 3 to the state shown in Fig. 3,
Since the work of screwing each push bolt 3 from the top of the model 1 to the bottom thereof can be omitted, it is possible to separate the molds 1 and 2 from each other much more easily and in a shorter time than the conventional mold separating device of FIG. it can. Further, when the push bolts 3 are removed from the model 1, it is not necessary to unscrew the push bolts 3 until the push bolts 3 come out of the model 1. Therefore, the push bolts 3 can be removed much easier and in a shorter time. Further, since the tip end portion of the nut 4 in the insertion direction into the insertion hole 11 is formed into the tapered surfaces 41c and 42c which are inclined downward in the insertion direction, the nut 4 can be smoothly inserted into the insertion hole 11. .

The mold separating apparatus according to the present invention can be implemented even when the nut 4 is not a split nut. If the nut 4 is not a split nut, when setting the push bolt 3 on the model 1 as shown in FIG. 3, turn the nut 4 until the tip of the shaft of the push bolt 3 slightly protrudes from the nut 4. Attach to the push bolt 3. When the push bolt 3 is reused, the nut 4 is rotated in the screw returning direction until the tip of the push bolt 3 slightly protrudes from the nut 4.

In the mold separating apparatus of the present invention, the positions and the numbers of the slits 10 and the insertion holes 11 formed in the model 1 mainly depend on the planar shape and weight of the model 1. Normal,
When the model 1 is a quadrangle or a triangle in a plane, the slit 10 and the insertion hole 11 are formed at least near each corner of the model 1. Therefore, the slits 10 and the insertion holes 11 are formed at a minimum of three places in the model 1.

The mold separating apparatus according to the present invention not only separates the model from the mold and the mold during the mold manufacturing as in the above-described embodiment, but also floats the upper mold almost uniformly over the lower mold. It can also be used to separate other molds as long as they can be separated.

[0022]

According to the mold separating apparatus of the first aspect of the present invention, when separating the upper and lower molds, it is not necessary to screw the push bolt from the upper surface of the upper mold to the bottom surface. The molds can be separated from each other in a much shorter time. Also, when the push bolt is reused, it is not necessary to unscrew in the screw return direction until the push bolt comes out of the upper mold, so the push bolt can be reused in a much shorter time than the conventional technology. be able to.

According to the mold separating apparatus of the second aspect of the invention, since the nut is a split nut, the time required for separating the molds from each other and the time required to put the push bolt into a reused state are further shortened. Become.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a nut used for implementing a mold separating apparatus according to the present invention.

FIG. 2 is a rear view of the nut of FIG. 1 in a state where the split mold is opened 180 °.

FIG. 3 is a perspective view showing an example in which the mold separating apparatus according to the present invention is applied to mold separation in mold manufacturing.

FIG. 4 is a perspective view of a mold separating apparatus in conventional mold manufacturing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Model (upper mold) 10 Slit 11 Insertion hole 12 Female screw 2 Guide part of form 20 20 Mold 3 Push bolt 4 Nut 40 Screw hole 41, 42 Split mold 41a Groove 41b, 42b Connecting part 42a Convex ridge 41c, 42c Tapered surface 43 Hinge pin

Claims (2)

[Claims] 1. A mold for separating an upper mold 1 overlapping a lower mold 2 from the lower mold 2 by a plurality of push bolts 3 arranged at appropriate positions of the upper mold 1 so as to be almost evenly floated as a whole. In the separating device, each nut 4 having a screw hole 40 that matches each of the push bolts 3, and the upper die 1 vertically penetrates the upper die 1 at the appropriate place, and the push bolts 3 laterally. To each slit 10 formed so that it can be guided in a more vertical posture, and to the portion where each slit 10 of the upper die 1 is formed,
A push-screw type mold separating device comprising: each insertion hole 11 formed so that the nut 4 can be inserted from the side while the screw hole 40 is along the slit 10. 2. The nut 4 has a hinge pin 43 at one end.
2. The push-screw type mold separating device according to claim 1, which is a split nut composed of left and right half-split dies 41 and 42 connected by.