JPS59220249A - Flaskless type molding machine - Google Patents

Abstract

PURPOSE:To perform a core setting process in parallel with other molding process and to reduce the cycle time for molding by replacing alternately two drag flasks with a pair of lower flask receiving flasks with a flaskless type molding machine. CONSTITUTION:Two drag flasks 6 are replaced alternately between a flask plate station II and a core setting station III by means of a pair of drag flask receiving flasks 21,22 provided repeatedly turnably around the axial line of a perpendicularly disposed rotating column 19 with a flaskless type molding machine which forms a casting mold by using one cope flask 5 and two drag flasks 6. A core setting process is thus accomplished in parallel with the other molding stage.

Description

[Detailed Description of the Invention] Technical Field The present invention provides a method for squeezing molding sand filled into molding molds by applying squeezing pressure to the molding sand filled in the molding molds in the order in which a match plate is sandwiched between the upper and lower molding molds. It is related to a frameless mold making machine that produces a frameless mold by compacting and then removing the frame, specifically, a frameless mold that is effective when one of the molding processes includes a core placement process. Regarding the construction fPJ#ll.

Prior Art FIG. 5 shows a conventional frameless mold making machine. To do this, first, in the molding station, a match plate 31 having a model on both sides or one side is held between upper and lower mold frames 32 and 33, and then the molding sand is compacted using a pair of squeeze plates 34 and 65. After that, both formworks 32 and 33 are rotated 90 degrees along the horizontal axis together with the mating plate 61, and moved to the frame extraction stage ■, where the core is manually inserted and the cylinders 56 and 57 are used to remove the core. Frame punching is performed by a mold receiving plate 68 and a mold pressing plate 69 that are moved up and down. In other words, the core is placed by hand.
Separate (cut out) the upper and lower formworks 32 and 33 as shown in the figure,
The process is carried out with the match plate 61 being received by the match plate receiving frame 40 and horizontally retracted to the side, but while the core is being inserted, the drawing board 38, which is the next step, is
．． In conventional frameless mold making machines, it is not possible to shift to the frame punching operation using 39, which causes the cycle time of the molding operation to be increased due to the certain amount of time spent on inserting the core. ing.

Purpose of the Invention The purpose of the present invention is to provide a frameless mold making machine that can eliminate the above-mentioned conventional drawbacks and shorten the mold making cycle time including the core placement process. be.

Structure of the Invention The frameless mold making machine of the present invention performs mold making using one upper frame and two lower frames, and the two lower frames repeatedly rotate around a vertical axis. The structure is such that the frame extraction station and the core storage station can be exchanged alternately by a pair of lower frame receiving frames, which are provided so that the core installation process can be performed in parallel with other molding processes. It is considered possible to do so.

Embodiment FIGS. 1 and 2 show the entire lip frame type time molding machine of the present invention. In the figure, 1 is a frame erected on the floor 2, and the core frame 1 has a A guide means 6 constituted by two parallel bars is mounted so as to be rotatable repeatedly through 90 degrees via a horizontal rotation shaft 4. Upper and lower 1F9 frames 5 and 6 are respectively attached to the guide means 5 so as to be able to slide in the axial direction via an underframe Otsu 8, and these formworks 5 and 6 are connected to each other by hydraulic cylinders (not shown). Approach/Rumor 1/- each is possible.

Here, the position where the guide means 6 is horizontal (parallel to the floor surface 2) is defined as the molding stage I, and the position where the guide means is vertical (perpendicular to the floor surface 2) is defined as the frame punching station ■. The stop position of " in the station 1.11 is determined by a part of the guide means 5 coming into contact with the strike, /1.10. Of the upper and lower formworks 5.6, the upper frame 5 is the underframe. 7, the lower frame 6 is positioned with positioning pins against the underframe 8, supported on it, and is removable (
do. Also, between the upper and lower formworks 5 and 6, both sides (or one side [
A match plate 11 having a four-piece shape is disposed in III), and the match plate 11 is held between the two plastic frames 5 and 6 and is connected to the station 1 in O1J. It is repeatedly moved between N.

The molding station 1 is equipped with a pair of squeeze devices ff! that are equipped with squeeze plates 12 and 13 that can be fitted into the upper and lower formworks 5 and 6 from the back side. 14.15 power! The squeeze plates 12 and 13 are attached to the frame 1 so as to face each other, and are moved back and forth 81j by squeeze cylinders 16 and 17. The molding station also includes a molding sand supply device 18 that supplies molding sand into the upper and lower mold frames 5.6.
is supported by the frame 1, and the squeeze plates 12, 13 are lowered while being fitted into the molds 5, 6 to supply molding sand through the inlets 5a+6a.

On the other hand, near the frame punching station page, there is a rotating column 19.
is vertically arranged and rotatably held by the frame 1, and the rotating column 19 is connected to a rotary cylinder 20 (
It can be rotated repeatedly by 180 degrees using a swing motor. A pair of lower frame receiving frames 21.22 formed symmetrically with the column 19 in between are horizontally fixed to the rotating column 19.
It is formed in a U-shape so that the lower frame 6 can be received from the underframe 8 when the lower frame 5.6 is separated (during mold removal). Then, the lower frame receiving frames 21 and 22 are repeatedly rotated between the frame extraction stage paddle ■ and the core insertion stage groove which are set at symmetrical positions with the rotating column 19 in between, and the two lower frames 6 are rotated repeatedly. It is designed to alternate between both stations 1.1. Also,
Above the lower frame receiving frames 21 and 22, the rotary column 19 is provided with a U-shaped U-shape for mounting and supporting the match plate 11 when separating the upper and lower formworks 5.6, and for temporarily retracting it from the entire frame removal station I. A match plate 9 frame 26 is attached via a receiving frame holder 24. That is,
@4 As shown in Figure 4, the receiving frame holder 24 is attached to the rotary column 19 so that it can be repeatedly rotated in a range of about 90 degrees by the evacuation cylinder 25, and the match plate receiving frame 25 is rotatably mounted to the receiving frame holder 24. cylinder 26
It is installed so that it can be raised and lowered within a range of approximately 90 degrees using a swing motor.

Further, in the frame removal station 1, a mold receiving plate 28 is disposed below the frame and can be moved up and down by a pressure cylinder 27 and fit into the lower frame 6, and above the frame is arranged by a pressure cylinder 29. A mold pressing plate 60 that can be fitted into the upper and lower mold frames 5 and 6 is installed at the end, and the frame of the tank chamber is removed by the cooperative action of these two plates 28 and 30. It has become.

The wood stud embodiment is constructed from KIi4 as described above, and its function will be explained below. Figure 1 is!・Indicates a stopped type 1 state. In other words, the upper and lower formworks 5 and 6 are matched V
- It is located at the molding station I, holding the sheet 11 between the two sides. Both squeeze devices in this state! When 14 and 15 are cut out and squeeze play) 12 and 13 are fitted to the set positions in the molds 5 and 6, respectively, and a closed molding cavity is formed,
Thereafter, the molding sand supply device 18 is lowered and its lower end surface is brought into contact with the side surfaces of the molds 5 and 6, and the molding sand is introduced into the molding holes 5a and 6a using a known blower type or the like. Supply within the facility.

Next, for example, the squeeze device 15 is operated while the squeeze device 14 is kept in a fixed state, and the squeeze spray M2 is
．． The molding sand is compacted by Step 13. However,
When tamping is complete, both squeeze plates 12.13
are respectively retreated back to their original positions, and the foundry sand supply device 18 is also raised and returned, and then the guide means 3 rotates @
4 and rotate 90 degrees, and formworks 5 and 6 move to frame removal station run ■.

In frame removal stage 1, as shown in Fig. 2, the frame 8 is moved away along the guide means 6, and the upper and lower formworks 5.6 are separated. So-called die cutting is performed, and at this time, the match plate 26 is mounted and supported on the waiting match plate receiving frame 26 in a state where it is positioned by positioning pins.

Further, during the lowering which is the separating operation, the lower frame 6 is mounted and supported on one of the lower frame receiving frames 21 which is on standby in a state where it is positioned by positioning pins. That is, the lower frame 6 is detached from the underframe 8 and received by the lower frame receiving frame 21. Next, the rotary cylinder 20 is operated, and the lower frame receiving frame 21, 22 is horizontally rotated 180 degrees together with the rotary column 19, and the lower frame 6 that has been cut out is transferred to the core storing stage Ron ■, while the previous The lower frame 6 that has been molded in the step 2 and to which the core has already been delivered is transferred (returned) to the frame removal stage 1. At this time, the evacuation cylinder 25 operates simultaneously or in advance, and the receiving frame holder 2
4, the match plate receiving frame 23 is horizontally rotated by 90 degrees to temporarily retract the match plate 11 from the frame extraction stage 1, and at the retracted position, the rotary cylinder 26 is actuated to move the match plate receiving frame 26 along the horizontal axis. The match plate 11 is erected by rotating it approximately 90 degrees.

When the above operations are completed, the core is placed in the lower frame 6 and the mold is inspected in the core placement stay Vwn amount.

The mold removal inspection of the upper frame 5 is performed by checking the match plate 11 which has been raised as described above. On the other hand, at the frame removal station, the lower frame 6, which has completed inserting the core,
After being carried in, both underframe inserts 8 operate in the approaching direction, and the underframe 8 receives the lower frame 6 on the lower frame receiving frame 22, positioned with the positioning pin 1, and rises. Then, upper and lower formwork 5.
6 are joined and the mold matching is completed, a frame punching operation is performed.

That is, with both mold frames 5.6 fixed at the mold matching position, the barrel-shaped receiving plate 28 is raised, while the mold pressing plate '50 is lowered and fitted into the mold frames 5.6, and the mold is removed. After pressing from above and below, both plates 28 and 30 are lowered synchronously, thereby pushing the mold downward and forming the mold frame 5.
, 6. After 7, the mold suppressing plate 60 is raised and returned, and the light chamber from which the frame has been removed is transported to the next step, the pouring step, by a known conveyance device. Continued above,
The lower formworks 5 and 6 are spaced apart again, and during this time the match plate receiving frame 25, which has been rotated back to the horizontal position by the operation of the rotary cylinder 26, is horizontally rotated by 90 degrees by the operation of the evacuation cylinder 25, and the frame is removed. Returned to the removal stay F, N■. Therefore, the match plate 11 is installed between both formworks 5, 6, and in this state both formworks 5, 6 move in the approaching direction to clamp the match plate 11, and then the guide means 6 rotates 90 degrees along with the rotating shaft 4, and the inner frames 5 and 6
The match plate 11 is then transferred to the creation station 1.

In this way, one cycle of rolling molding by the wooden mold molding machine is completed.

Effects of the Invention As described in detail above, the present invention reduces the cycle time of time molding by making it possible to carry out the core loading process in parallel with all f steps in a series of time molding processes. The time required for inserting the core can be reduced.
This is extremely effective in improving productivity.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view when the upper and lower formworks are on the molding stationary run, FIG. 2 is a front view when the upper and lower formworks are on the molding stationary run, and FIG. 6 is a plane 14g for receiving a lower frame receiving frame, FIG. 4 is a plan view showing a match plate receiving frame, and FIG. 5 is a front view showing a conventional example. 1... Frame 3... Guide means 4... Rotating shaft 5, 6... Form frame 7.8... Stand frame 11... Match plate 14.15... Squeeze device 18...・Casting sand supply device 19... Rotating column 21.22... Lower frame receiving frame 2
5...Matsuchi plate receiving frame

Claims (1)

[Claims] A stand that holds a pair of upper and lower formworks that are supported by a guide shaft member so as to be movable in the same diameter in the axial direction, and that can be repeatedly rotated around a horizontal axis between the molding station and the frame-cutting stage. A frame, a match plate with a width of 1 piece between the two formworks, a pair of squeeze stubs (V-) that can be inserted into the formworks from the back sides of the upper and lower formworks at the molding station, and a frame punching plate. A match plate receiving frame that is rotatable repeatedly around the vertical axis in order to receive the match plate at the interval between the upper and lower formworks and to once retreat it from the frame punching station at the step V. and a lower frame spaced apart from the matching plate and a lower frame to which the cores are delivered are provided so as to be rotatable repeatedly around a vertical axis for alternately replacing the lower frame with the core delivered therebetween. a pair of lower frame receiving frames, and a mold receiving plate and a mold pressing plate that are inserted into the mold frame to clamp the mold and extract it from the mold in the frame removal stage. This is a frameless mold making machine that is characterized by: