JPS6013572Y2 - Mold clamping device for vertical molding machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold clamping device that can be easily adjusted to changes in mold thickness in a vertical casting machine or the like.

The forming plate of a vertical casting machine, etc. consists of a lower mold on a lower fixed plate, and an upper mold under a movable plate that is slidably mounted on a tie bar erected on the fixed plate. The lock cylinder on the upper fixed plate pressurizes the lock bar set up on the movable plate to clamp the mold.

In the conventional mold clamping device described above, when the mold thickness is changed and the mold height is changed, this is dealt with by changing the length of the lock bar or changing the mold lifting platform, etc. Such conventional methods are laborious and complicated.

The present invention was developed in view of the above, and its purpose is to provide a change arm on the upper fixed plate so that it can move up and down and rotate freely, and to set a mold thickness adjustment spacer on this, and to adjust the spacer when opening the mold. Add to or remove from lock bar,
To provide a mold clamping device in which the length of a lock bar can be changed and mold thickness can be quickly changed with simple work.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a cutaway side view of the main part of the molded plate in the open state, and Figure 2
The figure shows a plan view, and FIG. 3 shows a front view with a main part cut away in a mold closed state.

In the figure, a molding plate 1 includes a lower fixing plate 3 which is a substrate mounted and supported on a base 2, and a lower mold 4 is fixedly supported on this.

Tie bars 5 are vertically installed at the four corners of the fixed plate 3, and a movable plate 6 is fitted onto these so that it can slide up and down while being guided by the bars 5. The rod 7a of the mold opening/closing cylinder 7 installed upright in the section is connected to the movable plate 6 via the bracket 7b, and the cylinder 7 is driven to stroke the rod 7a, moving the movable plate 6 up and down to open and close the mold. A ring-shaped rotating base plate 8 is provided on the movable plate 6 via a support base 9, and as shown in FIG. 4, there are guide members 10 and 11 that guide the inner and outer diameters to ensure rotation, and rollers that guide the inner diameter. 12..., and a rod 13a of a rotary cylinder 13 provided on the movable plate 6 on the fixed side is pivotally connected to the base plate 8 via a bracket 8a.

Therefore, by driving the cylinder 13, the rod 13a is moved back and forth,
The substrate 8 is rotated by a predetermined angle.

On the rotating board 8, four locking holes 14 are set up at equal angular intervals, for example, every 906.

An upper die 15 is attached and supported on the lower surface of the movable plate 6 having the above mechanism.

An upper fixing plate 16 is fixedly supported at the upper end of the tie bar 5, and mold clamping cylinders 17 are installed at appropriate positions on this plate every 90'.
is attached downward, and its rod 17a moves vertically downward to rotate the rotary base plate 8 to the lock position.Thereby, the lock par 14 and the rod 17a are positioned coaxially, and the downward movement of the rod 17a causes the lock par 14 to rotate. This allows the movable plate 6
Pressure is applied downward to perform mold clamping when closing the mold as shown in Fig. 3.

A guide hole 18 is vertically provided between the mold clamping cylinders 17 of the upper fixing plate 16, and when the mold is opened, the rotary base plate 8 is rotated to the release position. In view of the position directly below the hole 18, move the movable plate 6 upward and open the guide hole 1.
The locking pars 14 were passed through the molds 8 and 8, and the mold opening operation was performed, as shown in Fig. 1.

A support cylinder 19 is provided on the center of the upper fixing plate 16, and a support cylinder 19 is provided on a rod 19a of the support cylinder 19. A support shaft 20 is concentrically erected on the rod 19a of the support cylinder 19, and a change arm 21 is attached to the support cylinder 19. The arm 21 is rotatably supported and includes four arm parts 22...

A support recess 23 that is open at both ends in the rotational direction is provided at the tip of each arm portion 22 of the arm 21, and the constricted intermediate portion 24a of the spacer 24 is engaged and held in the support recess 23.
An engaging protrusion 24a is provided at the lower end of the lock par 4, and an engaging recess 24b is provided concentrically at the upper end of the lock par 14.

The support cylinder 19 is provided with a rotation prevention cylinder 25, which engages and disengages from the arm portion 22 by advancing and retracting the rod 25a, thereby regulating or permitting the rotation of the cylinder. The stopper prevents the spacer 24 from coming off.

Next, to explain the operation in detail, when the mold thickness is changed, the mold thickness is changed via the arm portion 22 of the arm 21 onto the locking par 14 that protrudes onto the upper fixing plate 16 through the guide hole 18 when the mold is opened. A suitable spacer 24 is faced.

1 and 3 show two types of spacers, a long spacer A and a short spacer B, for the sake of explanation.

The arm 21 is moved up and down by the cylinder 19, so that it matches the length of the spacer 24 and the protrusion length of the lockper 14.
On the other hand, the arm 21 is rotatable, and thereby aligns the spacer 24 and the lockper 14, moves the cylinder 19 downward, engages the engagement protrusion 24b of the spacer 24 with the engagement recess 14a of the lockper 14, and then The arm 21 is rotated in the removal direction, and the lockper 14 is thereby
This means that the length has been changed by 4, which means that the mold thickness has been adjusted.

Thereafter, the mold is clamped, and in the case of changing the mold thickness, the spacer 24 can be removed from the locking member 14 by locking the intermediate portion 24a of the spacer 24 in the recess 23 and moving the cylinder 19 upward.

In this way, when changing mold thickness or mold height, it is possible to easily change the length of the lockper by attaching and removing the spacer and selecting the spacer, and mold clamping can be adjusted easily and quickly. The above can be planned with a simple mechanism.

The present invention has many advantages as mentioned above.

[Brief explanation of drawings]

Figure 1 is a broken side view of the main part after molding, Figure 2 is a plan view of the same,
Fig. 3 is a front view of the same, Fig. 4 is a sectional view taken along the line 4-4 in Fig. 3, Fig. 5 is a view of the main parts showing the change work, Fig. 6 is an enlarged plan view of the change arm, and Fig. 7 is a FIG. 6 is a view taken in the 7th direction of arrows. In the drawings, 1 is after molding, 5 is a tie bar, 6 is a movable plate, 14
is a lock par, 16 is a fixing plate, 17 is a mold clamping cylinder, 2
Reference numeral 1 designates a change arm, 19 a means for raising and lowering the change arm, 20 a support shaft, 23 an engaging/disengaging portion, and 24 a spacer.

Claims (1)

[Scope of utility model registration request] In a mold clamping device for a vertical mold plate, in which a lock bar and a mold clamping cylinder are provided between a movable plate for supporting the upper mold, which is provided on the tie bar so as to be able to move up and down, and a fixed plate provided at the upper end of the tie bar. Mold clamping for a vertical molding board, characterized in that a change arm device is provided at the upper end of the lock bar to freely engage and disengage the spacer so that it can be raised and lowered and rotatably supports the spacer. Device.