JPH0422533A - Device for manufacturing pattern - Google Patents

Abstract

PURPOSE:To surely hold a bar-like member with a carrying robot by forming V shaped cross sectional groove parts at both end faces of the bar-like member to cross shape and fitting fingers having wedge-like claw parts corresponding to the groove parts to a hand of the bar carrying robot. CONSTITUTION:The bar carrying robot 3 holds the bar-like member 2 put to the prescribed waiting position and superposes the bar-like members 2 to the designated position in a mounting device 4 based on the shaped data of the forming pattern surface 18a. Then, as the bar-like member 2 is held under condition of engaging the wedge-like claw parts 31 in the hand 6 side with the V shaped cross sectional groove parts 2a at the both end faces of bar-like member 2, even if position of the bar-like member 2 at waiting position is not controlled with high accuracy, the bar-like member 2 can be surely held.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mold manufacturing device, and particularly for manufacturing a mold suitable for use as a model when manufacturing a press mold or a mold for resin molding. Regarding the device.

Conventional technology In order to reduce the number of man-hours and time required to produce molds such as press molds, the mold itself is made from an assembly of rod-shaped members, and an arbitrary mold surface shape can be created on one end surface of the assembly. For example, Japanese Patent Application Publication No. 56-3634.3, Japanese Patent Application Publication No. 61-47217, and Japanese Patent Application Publication No. 61-276
It is known from Publication No. 741 and the like.

In all of these conventional techniques, each rod-shaped member constituting the aggregate as a whole is displaced in the axial direction by an ultrasonic vibrator or other driving means in a predetermined restraint state, and one end face of the aggregate is moved. The basic idea is to create an arbitrary mold surface shape corresponding to the envelope surface of the tip of each rod-shaped member.

Problems to be Solved by the Invention In the conventional mold manufacturing technology as described above, each of the rod-shaped members, which are assembled in advance and in a predetermined restrained state, is displaced in the axial direction. When a member is displaced, several rod-like members adjacent to it move simultaneously due to frictional force, and there is a limit to the improvement in the shape accuracy of the created mold surface.

Furthermore, if a predetermined gap is provided between adjacent rod-shaped members as in JP-A No. 61-276741, although several rod-shaped members will not move at the same time, as a result, the gap will be reduced. As a result, the aggregate density of the rod-shaped members decreases accordingly, and the shape accuracy of the mold surface created similarly to the above decreases. Moreover, if there is a gap between adjacent rod-shaped members, it cannot be applied to a mold manufacturing method in which, for example, a created mold surface is used as a model and molten metal is poured into it to produce an inverted mold.

The present invention was made in view of the above problems.
The purpose is to provide a mold manufacturing apparatus that can improve the accuracy of the mold surface shape and can also sufficiently handle the production of inverted molds as described above.

Means for Solving the Problems The present invention is an apparatus for manufacturing a mold in which a large number of rod-like members are assembled in a predetermined positional relationship, and a surface created on one end surface of the assembly has a mold surface shape. Then, based on the loading device and the shape data of the mold surface to be created, the rod-like members at a predetermined standby position are grasped and stacked in multiple rows and stages on the loading device, and a mold surface is created on one end surface. a bar material conveying robot that produces an assembly of rod-shaped members, and a groove portion having a V-shaped cross section is formed in a cross shape on both end surfaces of the rod-like member, and a hand of the bar material conveying robot is provided with a cross-shaped groove portion. It is characterized by a finger having a wedge-shaped claw corresponding to the cross-sectional shape of the finger.

Function: According to this structure, the bar material transfer robot grasps the bar-like members at a predetermined standby position based on the shape data of the mold surface to be created, and then sequentially arranges the bar-like members at specified positions on the loading device. Stack.

Since the bar member is gripped with the wedge-shaped claws on the hand side engaged with the grooves having a V-shaped cross section on both end faces of the bar member, the position of the bar member at the standby position can be determined with high precision. It is possible to reliably grip the bar-shaped member without having to carefully manage it.

Example FIG. 1 is a schematic explanatory diagram showing an embodiment of the present invention.

In FIG. 1, 1 is a magazine in which a large number of prismatic bars 2, 2... of the same size are arranged, 3 is a bar transport robot (hereinafter simply referred to as robot), and 4 is a loading device. As shown in FIGS. 7 and 8, grooves 2a each having a V-shaped cross section are formed in advance in the shape of a cross on both end faces of the bar 2. As shown in FIGS.

The robot 3 is equipped with a hand 6 at the tip of its arm 5, and after grasping the bar material 2 in the magazine 1 with the hand 6, the robot 3 uses the loading device 4 based on the shape data of the mold surface to be created as described later. It serves to sequentially arrange the bars 2 at the designated positions above.

As shown in FIGS. 2 and 3 in addition to FIG. 1, the loading device 4 includes a horizontal substrate 7, and is provided on the substrate 7 and is intermittently lowered by a predetermined amount by the action of a lift cylinder 8. Lifter table 9 and a pair of side plates 10.1 facing each other on both sides of Lifter table 9.
1 and a removable top plate 12. The top plate 12 is removed in advance, as shown in FIG. 1, so as not to become an obstacle during loading of the bars 2 onto the lifter table 9 until the loading of the bars 2 onto the lifter table 9 is completed.

The pair of side plates 10, 1.1 are each connected to a piston rod 15.16 of a cylinder 13.14 on the base plate 7, so that the telescoping action of the cylinders 13, 14 causes the pair of side plates 1.0.11 to move toward each other. It will move closer and further away.

The hand 6 is attached to the bracket 2 as shown in FIGS. 4 to 6.
A frame 24 connected to the tip of the arm 5 via a frame 24, a horizontal support f: to the frame 24, a pair of guide rods 25, and a pair of guide rods 25, which are guided by the guide rods 25 and approach each other as the clamp cylinder 26 expands and contracts. It includes a pair of sliders 27 and 28 that perform separation operations (clamping and unclamping operations), and a support par 29 that is suspended from the frame 24.

Fingers 30 for gripping the bar 2 are individually attached to the sliders 27 and 28, and the tips of the fingers 30 fit into the grooves 2a of the bar 2 as shown in FIGS. 7 and 8. A corresponding wedge-shaped claw portion 31 is formed with a step.

Therefore, when the fingers 30.30 grip the bar 2 by the clamping action of the pair of fingers 30.30, the groove 2a on the bar 2 side and the claw 31 engage, resulting in a so-called centering effect. Therefore, the relative positioning error between the hand 6 and the bar 2 can be absorbed and the bar 2 can be reliably gripped. Furthermore, the height of the lower end surface of the support par 29 is greater than the height of the claw portion 31. ．． Since the support par 29 is set so as to come into contact with the bar 2 held by the pair of fingers 30 and 31, this support par 29 serves to prevent the bar 2 held by the pair of fingers 30 and 30 from buckling.

Note that 32 in FIGS. 5 and 6 indicates the guide rod 25.
This is a guide block that guides the sliders 27 and 28.

In such a structure, when loading the bars 2 onto the lifter table 9, the lifter table 9 is waiting at the upper limit position as shown in FIG. Lid between lid and table 9
A slight gap C is secured to allow the table 9 to move up and down.

On the other hand, the robot 3 moves the bar 2 onto the lifter table 9 based on the shape data of the three-dimensional mold surface to be created.
Loading operation is carried out, and one bar material 2 in magazine 1 is loaded.
The operation of gripping, placing, and arranging at designated positions on the lifter table 9 is repeated multiple times.

That is, for example, suppose that the press mold 17 having the mold surface 17a to be created is subdivided into mesh shapes with a width corresponding to the thickness of the bar 2, as shown in FIG. Based on the shape data of the inverted shape of 17a, -layers N,,N! of the bars 2, 2... ...The bars 2, 2, etc. are sequentially arranged in a plane so as to reproduce the mold surface shape for each Nn on the lifter table 9, and when one layer (step) is finished, as shown in Fig. 10. Then, the next layer of bars 2, 2, etc. are stacked one after another on top of it.

Then, as shown in Fig. 10, one stage of bar material 2゜2...
・The ladle table 9 descends by the thickness of the bars 2. Therefore, by repeating the above-described loading of the bars 2, 2, etc. onto the lifter table 9 by the robot 3 and the intermittent lowering of the lid table 9, the required number of bars can be achieved as shown in FIG. Bar material 2, 2・
are stacked to form a mold 18 consisting of an aggregate of bars 2, 2-..., and one end surface of the mold 18 has each bar 2,
The mold surface 18 corresponds to the envelope surface of the tip surface of 2...
a is created. At this time, the shape of mold surface 1.8a is 9th
The shape is an inversion of the mold surface 17a in the figure.

After loading a predetermined number of bars 2, 2... on the lifter table 9, the pair of side plates 1, 0, 11 are advanced as shown in FIG. While aligning the aggregates 18, the side plates 10 and 11 and the lid table 9 are tightened and fixed with bolts 19. Similarly,
As shown in FIG. 12, the side plates 1.0, 1.1 and the top plate 12 are tightened and fixed with the poles 1-20. As a result, the mold 18 consisting of the aggregate of the bars 2, 2... is clamped and securely restrained, and the shape of the mold surface 18a created on one end surface thereof is maintained (see Fig. 13). .

After this, the entire loading device 4 is tilted down as shown in FIG. 13 so that the created mold surface 1.8a faces upward, and the mold surface of the mold 18 made of an aggregate of bars 2, 2... Molten metal (molten metal) 21 is poured onto 18a and is cooled and solidified to obtain an inverted mold 22 on which the mold surface 18a is transferred as shown in FIG. This inverted mold 22 is finished into a press mold 17 having the shape shown in FIG. 9 by cutting in a later process, but the mold surface 22a of the inverted mold 22 is a mold made of an aggregate of bars 2, 2... Since the surface 18a is transferred, it has a rough shape that is relatively close to the final product shape, and therefore can be finished into a predetermined shape with only a minimum amount of cutting.

In this way, according to this embodiment, the press mold 17 can be manufactured by substantially the same method as the mold casting method, so the molten metal 21
By rapid cooling, it is expected that the metal structure of the inverted mold 22 itself will become more dense, and in addition to improving the surface hardness, defects such as blowholes can be prevented.

In the above embodiment, the molten metal 21 is poured into the mold surface 18H to finally produce the press mold 17, but the mold can be manufactured by pouring styrene beads into the mold surface 18A using the same method. It is also possible to make a vanishing model made of Styrofoam for use.

In addition, instead of the method described in ``2'', for example, a surface plate is placed between the magazine 1 and the loading device 4, and one stage of bars 2,
2... are lined up and put together, and this - stage of bars 2, 2
... and the lifter table 9 is moved by the robot 3.
You may also put it on top.

Effects of the Invention As described above, according to the present invention, the bar-shaped members are arranged at specified positions on the loading device by the bar-material conveying robot, and the bar-shaped members are stacked one after another while creating the required mold surface shape. Since the mold is made from an assembly of members, there is less error in the positional accuracy of each rod-like member compared to the conventional method of displacing the restrained rod-like members one by one, and the resulting mold surface is Shape accuracy is significantly improved.

In addition, since the rod-shaped members are in perfect contact with each other, this also improves the shape accuracy of the mold surface, and it is also possible to create an inverted mold by directly pouring molten metal into the created mold surface. Become.

Furthermore, when gripping a bar-shaped member with the hand, the figure-7-shaped groove on the bar-shaped member side and the wedge-shaped claw at the tip of the finger engage, so there is an error in relative positioning between the hand and the bar-shaped member. can be absorbed.

As a result, the rod-shaped member can be reliably gripped without having to control the positional accuracy of the rod-shaped member at the standby position with high precision.
The reliability of the entire device is improved by preventing troubles caused by poor positioning accuracy of the rod-like members by preventing them from loading the rod-like members into the loading device with their positions deviated or from failing to grasp the rod-like members. can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of the entire device showing an embodiment of the present invention, FIG. 2 is a plan view of the loading device, FIG. 3 is a front view of the loading device, and FIG. 4 is a front view of the hand. 5 is a plan view of FIG. 4, FIG. 6 is a right side view of FIG. 5, FIG. 9 is a horizontal sectional view of the figure, and FIG. 10 is a perspective view of the press mold. Figures 11 and 12 are explanatory diagrams of the operation of the loading device when loading bars, Figure 13 is an explanatory diagram when pouring molten metal, and Figure 14 is a sectional view showing the rough shape of the manufactured mold. . 2... Bar material (rod-shaped member), 2a... Groove, 3...
Bar material transfer robot, 4... Loading device, 6... Hand, 9... Lifter table, 18... Model, 18a.
...Mold surface, 30...Finger, 31...Claw portion. Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 2a 31 (3 (J)) Fig. 9 Fig. 10!-1!-Isumoto

Claims (1)

[Claims] (1) A device for manufacturing a mold in which a large number of rod-shaped members are assembled in a predetermined positional relationship, and a surface created on one end surface of the assembly has a mold surface shape, comprising: a loading device; A rod that grasps rod-like members at a predetermined standby position based on the shape data of the mold surface to be processed, stacks them in multiple rows and stages on a loading device, and creates a mold surface on one end surface of the rod-like members to create an assembly of rod-like members. A material conveying robot is provided, in which grooves having a V-shaped cross section are formed in a cross shape on both end surfaces of the rod-shaped member, and a wedge-shaped groove corresponding to the cross-sectional shape of the groove is formed in the hand of the rod material conveying robot. A mold manufacturing device characterized in that a finger having a claw portion is attached.