JPS6322900B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fully automatic cold box integrally bonded core making machine, and the present invention relates to an "integratedly bonded core".
This means that a part of the core with a complex shape or structure is molded separately, and this molded core (joint core) is placed in a mold in advance, filled with molding material, and joined together. This refers to the completed core.

Conventionally, for cores with complex shapes or structures, that is, cores that are difficult to mold in a single molding operation, a part of the core is separately molded in advance, and this molded part is completed. Currently, a completed core is produced by placing it in a mold for molding the core and molding it. However, it is well known to those skilled in the art that such a conventional method requires labor, has an inconsistent molding cycle, is dangerous, and has poor workability in the molding operation.

The present inventor has successfully developed the present invention as a result of various studies and experiments aimed at improving this type of conventional system, and the technical structure of the present invention is as specified in each claim.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the accompanying drawings showing a specific example of the present invention.

Fig. 1 is a front view of the molding machine of the present invention, and Fig. 2 is a front view of the molding machine of the present invention.
Although it is a left side view of the figure, the joining core feeding device is omitted from the illustration. FIG. 3 is a plan view of FIG. 1.

In the drawings, reference numeral 9 denotes a blowhead truck which is suspended from the upper platen 21 of the molding machine frame and can freely traverse on rails by the operation of the blowhead truck traverse cylinder 12. is usually attached as shown in the figure. 5 is a lower mold trolley, and lower mold 2
Lower mold trolley lifting device 7 mounted on the machine base
This mechanism is equipped with a core push-up cylinder 15 and can be moved laterally by the operation of the lower mold carriage traverse cylinder 6. Reference numeral 23 denotes an upper mold, which is detachably disposed on the machine frame as is well known.

On the upper platen 21 of the molding machine, a crimping cylinder 13 having a blow valve 19, a molding material mixer 24, a molding material warmer, and other necessary equipment are arranged.

Reference numeral 1 denotes a welding core lifting device, which is suspended from a welding core transfer cart 2 that moves on a rail provided parallel to the front surface of the upper board 21, as shown in FIG. The welding core 25 is raised and lowered by the welding core chuck cylinder, and the welding core 25 set in the welding core feeding device 17 is grasped by the action of the welding core chucking cylinder, and the welding core 25 is moved onto the lower mold 22 by the action of the welding core transfer vehicle traverse cylinder 4. It is a mechanism for moving and fitting the joining core 25 into a predetermined position in the molding cavity of the lower mold 22.

14 is a reversing unloader, and a lower mold 22
The unloader 1 is moved between the surface and the core conveyor 26 by the operation of the rotary actuator 20.
The chucking section 4 has the function of reciprocating and placing the completed core on the core conveyor 26.

In addition, in the drawing, 18 is a blow plate, A
is the machine center, B is the blowing side center, C is the ejecting side center, D is the sand supply center, E is the welding core chucking center, F is the welding core device rotation center, 27 is the mold exchange trolley, Reference numeral 28 indicates a blow plate exchange mechanism, and 29 indicates a mold transfer cylinder.

The operating mode of the fully automatic cold box integrally bonded core molding machine, which is an example of the present invention and has the above-mentioned configuration, will be described below.

A large number of previously formed bonding cores 25 are set in the bonding core feeding device 17 as shown in the figure.

(a) Welding core setting process: The welding core lifting device 1 is lowered, and the welding core chucking cylinder 3 is operated to set the welding core 2 at the position of the welding core chucking center E.
5 is held by the joining core lifting device 1. While holding the joining core 25, the joining core lifting device is raised. Next, the welding core transfer truck 2 is moved to the molding machine center A by the actuation of the welding core transfer truck traverse cylinder 4 while holding the welding core 25. The welding core lifting device 1 is adjusted so that it stops at the welding core chucking center E and the molding machine center A.

At the same time as the welding core lifting device 1 stops at the molding machine center A, a built-in cylinder is activated to insert the welding core 25 into a predetermined position of the lower mold 22. After the insertion is completed, the welding core chucking cylinder is operated to release the welding core 25, raise the welding core lifting device 1, and move the welding core transfer cart 2 to the welding core chuck. Move to Yatsuking Center E and return. still,
The lower mold cart 5 in FIG.
When inserting the die, the lower mold carriage 5 is positioned above the center C on the removal side.

(b) Molding sand blowing process: After completing the setting of the joining core in the lower mold 22, the vise, mandrel, insert, etc. of the mold are closed, and the lower mold trolley traverse cylinder 6 is operated to blow the lower mold. The mold cart 5 is moved from the center C on the take-out side to the center B on the blow-in side. At this time, the rod tip of the lower mold truck traverse cylinder 6 is attached to the terminal truck 8, and the terminal truck 8 and the lower mold truck 5 are connected by a hook. Next, the lower mold cart 5 located at the center B on the blowing side is raised by the operation of the lower mold cart lifting device 7, and the lower mold 22 and the upper mold 23 are brought into close contact with each other. Note that the hook connecting portion between the terminal truck 8 and the lower mold truck is a sliding mechanism, and the terminal truck 8 does not rise.

The blowhead truck 9 is moved by the operation of the blowhead truck traverse cylinder 12, and the blowhead 10 is moved from the sand supply center D to the molding machine center A. The blow head 10 located on the center A is lowered by the operation of the pressure cylinder 13 until the blow plate 18 comes into close contact with the upper mold. With the blow plate 18 and the lower mold 22 lifted by the lower mold truck 5 in close contact with the upper mold 23, the blow valve 19 is opened to blow the molding sand in the blow head 10 into the mold cavity in the mold. After the blowing is completed, the residual pressure of the blowing air in the flow head 10 is exhausted. After this evacuation is completed, the blow head 10 is opened by the operation of the crimp cylinder 13.
to rise. At this time, the blow head 10 is raised by a spring (not shown) built into the blow head truck 9.

(c) Gugging process: The blow head truck 9 is moved by the operation of the cylinder 12, and the gashing head 11 is moved onto the machine center A and stopped. In this case, the blow head 10 is located on a sand supply center D, and the blow head is supplied with molding sand from a hopper.

The gushing head 11 located on the machine center A is lowered by the operation of the crimping cylinder 13 until it comes into close contact with the back surface of the upper mold 23, and then the extrusion shaping pin (not shown) built in the gushing head 11 is moved. The upper mold 23 is lowered, and the molding sand remaining at the blowing port of the upper mold 23 is shaped to shape the surface of the molding core. After shaping the injection port, the molding sand filled in the mold cavity is hardened by blowing hardening gas or reaction gas supplied from a gas generator (not shown), and the molding sand is inserted first. A completed core is integrally joined with the joined core 25.

After the curing reaction is completed, the curing gas is expelled and the gassing head 11 is raised and returned to its original position.

(d) Mold release/carry-out process: The lower mold cart lifting device 7 is operated to lower the lower mold cart 5 holding the molded integrally bonded core to a predetermined position and stop it.

By operating the rotary actuator 20, the reversing unloader 14 is reversed 90 degrees from the neutral position shown in FIG. Move from B to center C on the extraction side and stop. Next, the core extrusion cylinder 15 attached to the lower mold trolley 5 is operated to cause the extrusion pin (not shown) to protrude into the lower mold 22, and to integrate it into the frame of the unloader 14 that was previously inverted. Push up the joining core and release it from the mold.

The integrally bonded core pushed up into the frame of the reversing unloader 14 is clamped by the operation of the reversing unloader core chucking cylinder 16, and the reversing unloader 14 is rotated 180 degrees and placed on the core conveyor 26. Then, the chucking cylinder 16 is opened, and the integrally bonded core is placed on the core carrying-out conveyor 26 and carried out. The reversing unloader 14 is reversed 90 degrees and returned to the neutral position,
At the same time, return the core push-up cylinder 15,
Move on to the next molding cycle.

The molding cycle of the molding machine of the present invention has been described above, and the main attached mechanisms installed in the molding machine of the present invention will now be explained.

(e) The mechanism of the welding core feeding device 17 is described in detail in the patent application filed concurrently by the present applicant. It is mounted on a rack so as to be movable laterally, and is equipped with a mechanism for always arranging the welding core 25 at the welding core chucking center E, and two pallet groups, with the welding core feeding device rotating center F being the center. The structure also includes a mechanism that allows easy rotation and setting of the pallet of joining cores.

(f) The mold exchange trolley 27 is arranged as shown in FIGS. 2 and 3, and receives the upper mold 23 removed from the machine frame by raising the lower mold trolley 5. 5 is lowered to a predetermined position (as shown in Figure 2), the lower mold trolley 5 on which the upper mold 23 is placed is moved to the removal center C by the operation of the lower mold trolley traverse cylinder 6, and the hook is released. Then, the mold transfer cylinder 29 is operated to place it on the mold exchange cart 27, and a new lower mold cart 5 is set by operating in the reverse order.

(g) If the mold is replaced with a different type of mold, the blow plate must also be replaced. Raise the blow plate exchange mechanism 28 to receive the blow plate detached from the blow head 10, rotate the blow plate exchange mechanism 28 horizontally, replace it with a new blow plate, and replace the blow plate with the blow plate by reversing the above operation. There is a mechanism to attach it to.

The molding machine of the present invention has the configuration and operation as described above, and the functions and effects achieved are as follows: (1) Rotary welding core feed for supplying the welding core 25 The cores can be automatically fed by the device 17 without stopping the molding operation. (2) The cores 25 are sequentially and intermittently fed to the feeding position by the bonding core feeding device 17. (3 ) The core 25 on the joining core device 17 is accurately positioned and loaded into the mold 22 by the core transfer devices 1 and 2. (4) The core 25 on the joining core device 17 is accurately positioned and loaded into the mold 22. This is a labor-saving mechanism that automatically shapes and takes it out onto a conveyor.

(5) Not only the molding work, but also work such as mold replacement, blow plate replacement, and blow plate removal/removal is automated (labor saving).

(6) A mixer is installed to constantly mix and supply the appropriate amount of cold box sand, which can be used for a short period of time.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of the molding machine of the present invention, Fig. 2 is a side view with the joining core feeding device of Fig. 1 omitted, and Fig. 3 is a plan view of Fig. 1. 1 is a welding core lifting device, 2 is a welding core transfer truck, 3 is a welding core chucking cylinder, 4 is a cylinder for the welding core transfer truck, 5 is a lower mold truck, and 6 is a lower mold. 1. Cart traversing cylinder, 7 lower mold cart lifting device, 8 terminal cart, 9 blow head cart, 10 blow head, 11 gassing head, 12 flow head cart traversing cylinder, 1
3 is a crimping cylinder, 14 is a reversing unloader,
15 is a core push-up cylinder, 16 is a reversing unloader core chuck cylinder, 17 is a joining core feeding device, 18 is a blow plate, 19 is a blow valve, 20 is a rotary actuator, 21 is an upper plate, 22 23 is a lower mold, 23 is an upper mold, 24 is a mixer, 25 is a joining core, 26 is a core conveyor, 27 is a mold exchange trolley, 28 is a blow plate exchange mechanism, and 29 is a mold transfer cylinder. be.

Claims (1)

[Scope of Claims] 1. A cold box having a sand blowing mechanism and a gassing mechanism that are suspended from the upper plate of the molding machine frame and can move freely, and a lower mold carriage that can be raised and lowered is provided on the molding machine frame. The child molding machine is equipped with a rotatable integrally bonded core feeding device on one side outside the molding machines, a reversible unloader on the other side, and a This is a fully automatic cold box integrated bonding core making machine that has a bonding core transfer cart with an integrated bonding core lifting device on the upper plate that is freely suspended. 2. A fully automatic cold box integrally bonded core molding machine according to claim 1, which is equipped with a sand replenishment mechanism and a molding material mixer on the upper plate of the molding machine frame. 3. The fully automatic cold box integral joining core making machine according to claim 1, which is equipped with a mold quick attachment/detachment mechanism and a blow plate quick attachment/detachment mechanism.