JPS61103660A - Metal pattern exchanger - Google Patents

Abstract

PURPOSE:To exchange safely and easily a metal pattern by joining the pattern to a bracket by means of connectors, joining the same to a hoisting plate which can slide in the direction perpendicular thereto and hoisting the pattern via a cushion device by a hoisting block adjustable of the centroid position. CONSTITUTION:The metal pattern 18 is connected to the bracket 22 by means of the connectors 60. The metallic pattern is joined by the connectors 60 to the plate 23 intersecting horizontally and orthogonally with the bracket 22. The right and left centroid positions are adjusted by a handle 28 and a screw shaft. The centroid position of the sliding block 19 of the bracket 22 is adjusted by a handle 27 and a screw shaft 24 and the metal pattern is hoisted and moved by a hook 3 of a crane, etc. via the cushion device 40. The metal pattern 18 is hoisted while the centroid position thereof is adjusted and therefore the attachment and detachment thereof are made safe and easy and the time for exchanging the metal pattern is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mold changing device that can be used to change molds of injection molding machines, Guicast machines, and the like.

(Prior art) Fig. 7 is a perspective view of the conventional device in a state in which the mold is suspended using a crane, etc., Fig. 8 is a front view illustrating the installation of the conventional device to an injection molding machine, etc., and Fig. 9 is the same. FIG. 10 is a side view illustrating the attachment, and is a detailed cross-sectional view taken from A to A in FIG. 9.

The mold changing method and device for conventional injection molding machines, etc. are as follows:
There are various methods, ranging from methods that simply suspend the mold using a crane or the like, to complex and expensive methods such as an automatic mold exchange system that combines a mold carrier, a guide roller, a die clamper using a hydraulic cylinder, etc.

In the former case, when the mold 1 is suspended with a hook 3 of a crane or the like, the mounting surface 1a of the mold 1 is attached to the mold mounting plate (fixed plate) 10 of the injection molding machine or the like as shown in FIG. mounting surface 10a of
In many cases, they are not necessarily parallel to each other, but are inclined. Therefore, the sling is the mold 1 in work (wire hanging, hanging, etc.)
The leveling work required a certain level of skill and careful attention.

During this leveling work, if the Y-axis is not level, please align the locate ring 2 and reference ring 8, or if the Y-axis is not level, check the mold mounting bolt 7 as shown in Figure 10. Since the holes 9 in the mold into which the bolts are inserted and the screw holes 12 in the fixed block 10 and movable platen 11 are misaligned and do not match, inserting and tightening the bolts 7 is very difficult and requires a lot of time and effort. Ta. Moreover, the larger the weight of the mold (several tons to several tens of tons), the more remarkable this problem became. Even if the above-mentioned leveling has been sufficiently performed, the centering (positioning) of the locate ring 2 and reference ring 8 can be done by slightly lifting the mold with the hook 3 of a crane or the like.
After lowering and traversing the movable plate 11 and performing accurate centering, it was necessary to move the movable plate 11 forward and tighten the mold l.

Conversely, when removing the mold 1 from the injection molding machine, attach the shackle 5 and wire 6 to the hanging bolt 4 attached to the mold 1, and use the hook 3 of a crane etc. to attach the mold by intuition. Apply a force that is considered to be commensurate with the weight in advance, loosen the mounting bolt 7, and remove it.
~When loosening the two bolts, the mold 1 would tilt or the locate ring 2 would suddenly come off, which could be dangerous.

As described above, the conventional method has the disadvantage that it requires great care and a lot of time and effort for leveling, centering, inserting and removing bolts, etc.

(Problems to be Solved by the Invention) The present invention solves the problem that conventional mold replacement requires careful attention and a lot of time and effort for leveling, centering, inserting and removing bolts, etc. This is an attempt to solve such problems.

(Means for Solving the Problems) For this reason, the present invention provides a mold changing device such as an injection molding machine, which includes a hanging block that is slidable in one direction along a bracket that has a connector with the mold; A center of gravity movement adjustment device consisting of a hanging plate that can be slid along the bracket in a direction perpendicular to the sliding direction of the block and has a connection tool with the mold, and between the adjustment device and the hook of a crane, etc. The apparatus is equipped with a shock absorber containing a built-in spring, and is configured to perform leveling and centering in the vertical direction.

(Function) The center of gravity movement adjustment device and the shock absorbing device are hung from a hook of a crane, etc., and the bracket and suspension plate of the center of gravity movement adjustment device are connected to the mold using a connecting tool. Then, the suspension block and the suspension plate are respectively slid along the bracket in directions orthogonal to each other to perform leveling. Next, when removing the mold, lift the hook using a crane, etc., make sure that the spring position scale of the shock absorber is almost the same as the scale when the mold is installed, and open the mold until the mold can be removed. Then, hoist the mold up with a crane, etc.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Figs. 1 to 6 show an embodiment of the present invention, and a center of gravity movement adjusting device 20 is installed between a hook 3 of a crane or the like and a mold 18. , a shock absorber 40 that also serves as a scale, and a chain 60 with a one-touch hook are provided, and the mold 18 is provided with a total of two positioning pins 55 with a taper instead of the locate ring 2 shown in FIG. 7, or from this as shown in FIG. A total of two protrusions are provided, one each of a tapered stepped positioning pin 56 having a stepped portion at the long end and a tapered positioning pin 55.

Next, details of the scale-cum-shock device 40 will be explained with reference to FIG. 5. The eye bolt 7 is engaged with the outer cylinder 50 by a screw and is integrated therewith. The outer cylinder 50 is provided with a long hole 51 and a scale 52. In addition, the inand 48 is threadedly connected to a bolt 44 provided slidably in the longitudinal axis direction with respect to the outer M50, and is locked with a nut 46. Between the outer cylinder 50 and the bolt 44, there is a Washer 42 with groove 49 and spring 4
3 is set up and held at camp 41. 45
is a ring nut for locking the camp 41 and the outer cylinder 50 to prevent loosening. Further, when weight (tensile force) acts between the eye bolt 47 and the eye nut 48, the spring 43 is compressed, and the amount of movement is proportional to the weight and is indicated by the scale 52 by the display groove 49. Note that the spring 43 is preferably a compression spring in consideration of safety in case it breaks. Alternatively, the function may be removed.

Next, the center of gravity movement adjustment device 20 will be explained with reference to FIGS. able to slide into,
It also has a structure that can support loads in the direction perpendicular to the Y axis. A bracket 22 with a T-shaped structure has a rail 16 and a bolt 1.
5, and the slide bearing 25 is fixed to a vertical plate 22a integral with the bracket 22 with bolts (not shown). Also, the rail 14 integrated with the hanging plate 23
is slidably connected to the slide bearing 25. In this way, the hanging block 19 and the hanging plate 23 are free to move relative to the T-shaped bracket 22 in directions perpendicular to each other.

On the other hand, there is a handle 2 between the hanging block 19 and the vertical plate 22H.
A threaded rod 24 having a handle 28.
A screw stud 26 having a diameter 28a is provided. These screws 24 and 26 restrict free movement in the above-mentioned right angle direction, and by turning the handle 27, the hanging block 19 moves in the Y-axis direction, changing the relative relationship between the hanging block 19 and the T-shaped bracket 22. The amount of change is determined by the index 29 attached to the slide bearing 21 and the scale 31 (rail 1
6).

Similarly, by turning the handle 28 or 28a, the relative relationship between the hanging plate 23 and the T-shaped bracket 22 changes, and the amount of change is determined by the index 30 attached to the slide bearing 25 and the indicator 30 attached to the hanging plate 23. This can be determined by the scale 32. The guide 23a is a member that is integrated with the suspension plate 23 and has an internal thread that engages with the screw stud 26. As shown in FIG. 10, 57 is a mating hole for the tapered positioning pin 55 and the stepped positioning pin 56, which replaces the conventional reference ring 8.

Next, the operation of the embodiment configured as above will be explained. First, to explain the mold installation, each of the above-mentioned devices 4
0.20.60 is hung with hook 3 of a crane or the like.

Next, the chain 60 with one-touch hooks of each device 40, 20, and 60 is hung on the eye port of the mold 18 (three places), and a crane or the like is hoisted up to suspend the mold 18.

At this time, the spring 43 is deflected by an amount corresponding to the mold (iW),
Spring forces T and W are balanced. Next, the X-axis, Y-axis direction,
Leveling is performed by turning the handles 27, 28, 28a, and the mold is moved to the mold platen 10.11 of the molding machine shown in FIG. 8, so that the mounting surfaces of the mold 18 and the mold platen 10.11 are opposed to each other. Next, by operating the crane etc.), the mold 18
The pins 55 and 56 of the mold plate are aligned with the pin holes 57 of the mold plate, and if the pins 55 and 56 are even slightly aligned with the bottle holes 57 (it is okay if they are not completely aligned), the mold of the molding machine is clamped. As a result, the mold 18 is light and positioned at a predetermined position.

As a result, as shown in FIG.
T=kz). Next, place the mold 18 into the mold ff1lo, 11, tighten it with the bolt 7, lower the hook 3 of a crane, etc., and connect the device 40, 20, 60 and the mold 18.
Remove the chain 60 with one-touch hook that connects the .

Next, to explain mold removal, each of the above-mentioned devices 40.
20.Hang the 60 with hook 3 of a crane, etc. Next, a crane or the like is moved to the molding machine, and the chain 60 with the one-touch hook of this device is attached to the eye bolt of the mold 18. Next, the hook 3 of a crane or the like is hoisted up so that the scale 49.52 of the shock absorber 40 is almost the same as the scale when the mold is installed. That is, britension is applied. Next, remove the bolt 7 to install the mold shown in Figure 10.
The molding machine is caused to open the mold to a position where the mold 18 can be taken out. Next, after confirming that the pins 55 and 56 are removed from the bottle holes 57, the hook 3 of a crane or the like is hoisted up.

(Effects of the Invention) As explained in detail above, the present invention provides a shock absorbing device with a built-in spring between the center of gravity movement adjustment device having a connection tool with the mold and the hook of a crane, etc. It is easy to level the Y axis, and it is possible to absorb misalignment during alignment, and conversely, when removing the mold, the weight of the mold appears to be zero until the load corresponds to the weight of the mold. Alternatively, it can be set to almost zero to prevent excessive force (load) from being applied to the mold mounting bolt in the direction perpendicular to the axis, and to facilitate the removal of the bolt. Therefore, according to the present invention, mold replacement work is safe and easy.
Also, the time required to replace molds can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a mold changing device showing an embodiment of the present invention;
Figure 2 is a partial cross-sectional front view of the main part in Figure 1, Figure 3 is a left side view of the same, Figure 4 is a right side view of the same, and Figure 5 is a partial cross-sectional front view of the RI device in Figure 1. Fig. 6 is an explanatory view of the action of the taper pin in Fig. 1, Fig. 7 is a perspective view showing the hanging state of the conventional mold, and Fig. 8 is a diagram showing the hanging state of the mold in Fig. 1. FIG. 9 is a front view showing the attached state, FIG. 9 is a side view of the same, and FIG. 10 is a sectional view taken along line AA in FIG. 9. Explanation of main parts of the figure 3 - Hook for crane etc. 18 - Mold 19 - Hanging block 20 - -
Center of gravity movement adjustment device 22- Bracket 23-... Hanging plate 24
．． 26 - Threaded rod 40 - Shock absorber 43 - Spring 60 - Chain with wonton hook (coupling tool) Patent Applicant Mitsubishi Heavy Industries, Ltd. Figure 5 Figure 7

Claims (1)

[Claims] In a mold changing device such as an injection molding machine, there is provided a hanging block that can be slid in one direction along a bracket that has a connector for connecting to the mold, and a hanging block that can be slid in one direction along the bracket in a direction perpendicular to the sliding direction of the block. It is equipped with a center-of-gravity movement adjustment device consisting of a hanging plate that is movable and has a connection tool with the mold, and a buffer device with a built-in spring installed between the adjustment device and the hook of a crane, etc. A mold changing device that performs centering in the vertical direction.