JPH036907U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 6 show one embodiment of the mold clamping device according to the present invention, and Figure 1 shows the threaded part or groove on the tie bar and the half nut at the stage when the movable mold and the fixed mold come into contact. A vertical cross-sectional view of the plane showing the meshing;
Figure 2 shows how the stroke of the mold clamping cylinder allows the threaded part or groove on the tie bar to engage with the half nut, and when the movable mold and fixed mold come into contact, the threaded part or groove on the tie bar and the half nut are engaged. Fig. 3 is a vertical cross-sectional plan view showing the nut being engaged, and Fig. 3 shows the operating state of the tie bar locking device. Fig. 3b is a plan longitudinal sectional view when the half nut and tie bar are engaged with each other by supplying pressure oil to the piston head chamber side of the half nut opening/closing cylinder, and Fig. 4 is the fifth when a spring is used as the pressing member of the half nut.
The figures each show the case where a ram cylinder is used as the pressing member of the half nut, and Fig. 6 shows the case where a gear is used instead of the sprocket of the screw mesh adjustment device shown in Figs. 1 to 5. Other examples will be shown. Further, FIG. 7 shows a plan longitudinal sectional view showing an example of a conventional device similar to the present invention. 1... Machine base, 2... Moving cylinder, 3
... Clamping cylinder, 4, 5 ... Piston, 6 ...
Piston rod, 7... Tie bar, 8... Threaded portion or groove, 9... Recess, 10... Fixed plate, 11...
...Screw mesh adjustment device, 13...Adjustment shaft, 14...
Half nut opening/closing cylinder, 17... Pressing member, 1
9... Sprocket part, 20... Movable plate, 21...
... Nutbox, 22...Half-split nuts, 26...
... Tie bar locking device, 30a... Fixed mold, 30b
...Movable mold, 33...Stopper box, 34
... Stopper member, 50 ... Connection plate, 60 ... Gear, 61 ... Holding plate.

Amendment 1992.9.7 The brief description of the drawing is amended as follows. From page 21, line 19 to page 22, line 4 of the specification, ``Figure 1 shows how the threaded part or groove on the tie bar and the half nut are engaged when the movable mold and the fixed mold come into contact. Fig. 2 is a cross-sectional plan view showing that the movable mold and fixed mold are in contact with each other by allowing the half nut to engage with the threaded part or groove on the tie bar at the stroke end of the mold clamping cylinder. A cross-sectional plan view showing a case where mold thickness adjustment is provided in the threaded part or groove on the tie bar, and the half nut is engaged with the threaded part or groove on the tie bar when the movable mold and the fixed mold are in contact with each other. , Fig. 2 shows a case where the mold thickness adjustment is applied to the stroke of the mold clamping cylinder, and the movable mold and the fixed mold are corrected to be in contact with each other.

Claims (1)

[Scope of utility model registration request] A fixed platen for holding fixed molds having a plurality of mold clamping cylinders was fixed on one end of the machine base, and a movable platen for holding movable molds was opposite to the fixed platen on the other end side of the machine base. One end of the plurality of tie bars passing through the movable platen is used as a piston part that is slidably provided in each mold clamping cylinder, and the tie bar is placed at the approximately center in the axial direction of the mold clamping cylinder. A molding machine in which a threaded part is provided, a device for moving the movable platen back and forth toward the fixed platen is provided between the fixed platen and the movable platen, and a half-split nut which is provided so as to be able to engage with the threaded part on the tie bar is attached to the movable platen. In the mold clamping device, when the mold thickness of both molds of the fixed mold and the movable mold is divided by the screw pitch of the halving nut and no fraction is found below the decimal point, the piston part is positioned at the retraction limit position. The structural dimensions are such that the threaded part of the half nut engages with the tie bar threaded part in advance, and a screw engagement adjustment device is provided between the movable platen and the end face of the half nut, and the mold When the thickness is divided by the thread pitch of the half nut and a fraction less than a decimal point is generated, the thread engagement adjustment device can be operated to move the half nut to a position where it engages with the threaded portion on the tie bar. A mold clamping device for a molding machine with a structure.