JPS6343047Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold clamping device that enables smooth replacement of molds in a mold-filling machine.

Conventionally, molds of mold-filling machines are generally fixed with bolts.

However, this type of mold needs to be replaced constantly due to changes in the production type, such as the number and depth of molding containers, or due to maintenance, inspection, etc., so the conventional technology using bolts not only takes a long time to install and remove. , the work was troublesome.

An object of the present invention is to semi-automate the clamping and unclamping of a mold to eliminate the drawbacks of the prior art using bolts.

The present invention will be explained below with reference to the drawings.

1, 2, and 3 show an embodiment of the present invention, in which four support shafts 2 are attached to a fixed frame 1 so as to be slidable in the vertical direction.

Each of the support shafts 2 has a lower end fixed to a single connecting plate 3, and is connected via the connecting plate 3 to a fluid pressure cylinder 4 which is a driving source. A mold holder 5 for an upper mold is provided at the upper end of the support shaft 2.

A lower mold 6 is fixed to the upper surface of the fixed frame 1, and an upper mold 7 is detachably attached to the lower surface of the mold holder 5 via a clamp device 8.

The clamp device 8 includes a cylinder chamber 9, a clamp shaft 12, a clamp claw 16, and a clamp groove 17, and four sets of the clamp devices 8 are provided near each support shaft 2. The cylinder chambers 9 are formed in a block 5' fixed on the mold holder 5, and air is supplied to each cylinder chamber 9 through a port 10 formed in the mold holder 5 and connected to a fluid pressure source C, and a flow path 11. Fluid pressures such as these are supplied and discharged synchronously. The clamp shafts 12 are provided passing through the cylinder chamber 9 and are attached to the mold holder 5 so as to be able to slide and rotate, and a handle 13 for rotational operation is provided at the upper end of each clamp shaft 12. is,
A piston 1 inserted into a cylinder chamber 9 is located in the middle part.
4 is fixed. Further, the clamp shaft 12 is fed under pressure from the fluid pressure source C, and is connected to the port 10 and the flow path 1.
The piston 14 is pushed upward by the fluid pressure supplied to the cylinder chamber 9 through the cylinder chamber 1, and is slid in the clamping direction. By pushing downward, a sliding operation is performed in the unclamping direction. The clamp claw 16 is formed into a substantially semicircular shape and is provided at the lower end of the clamp shaft 12. On the other hand, the clamp groove 17 is formed on the lower surface of the upper mold 7 in a substantially semicircular shape corresponding to the clamp claw 16.

Note that guide pieces 18 are formed at both ends of the upper mold 7 in the width direction, and a guide member 19 into which the guide pieces 18 are fitted is attached to the lower surface of the mold holder 5. The upper mold 7 can be guided in the longitudinal direction via a guide piece 18 and a guide member 19 when being pulled out or attached.

The clamping device having the above-mentioned configuration uses the fluid pressure cylinder 9 to close the connecting plate 3, when replacing the upper mold 7.
The upper mold 7 is raised via the support shaft 2 and the mold holder 5.

When the fluid pressure in the cylinder chamber of the clamp device 8 is switched to the discharge side, the piston 14 is pushed downward by the action of the compression spring 15 interposed in the cylinder chamber 9, and the clamp shaft 12 is moved in the unclamping direction. A sliding operation is performed, and the clamp claw 16 is released from the clamp groove 17 of the upper mold 7.

Next, operate the handle 13 and tighten the clamp shaft 12.
After rotating the clamp claw 16 from the configuration shown in FIG. 3a to the unclamping position as shown in FIG. By pulling out the upper mold 7 from the mold holder 5 as shown by arrow B, the upper mold 7 can be removed.

Next, when attaching the upper mold 7 to the mold holder 5, the procedure described above is reversed.

In the above-described embodiment, the clamp claws 16 and the clamp grooves 17 may be completely disengaged from each other by simply sliding the clamp shaft 12 in the unclamping direction, allowing the upper molding die 7 to be pulled out. Furthermore, a positioning means may be provided between the mold holder 5 and the upper molding die 7 for aligning the clamp claws 16 with the clamp grooves 17 when the upper molding die 7 is attached.

The present invention has the structure and operation described above, and the upper mold is attached to and detached from the mold holder by engaging and disengaging the clamp claw and the clamp groove in cooperation with the clamp shaft and fluid pressure. Since the upper molding die can be replaced with ease, the upper molding die can be replaced easily and in a short period of time.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing a clamped state in an embodiment of the present invention, Fig. 2 is a perspective view of an unclamped state, and Figs. FIG. 3 is an enlarged bottom view showing a dissociated state. 1: Fixed frame, 2: Support shaft, 3: Connecting plate,
4: Fluid pressure cylinder, 5: Mold holder, 6: Lower mold, 7: Upper mold, 8: Clamp device, 9: Cylinder chamber, 12: Clamp shaft, 14: Piston, 1
5: Compression spring, 16: Clamp claw, 17: Clamp groove.

Claims (1)

[Scope of utility model registration request] In a molding and filling machine having a fixed lower mold and a movable upper mold, a mold holder for the upper mold is provided at the upper end of a support shaft that is slidably mounted in the vertical direction, and the mold holder is attached to the upper mold. A cylinder chamber is formed, and a clamp shaft is attached slidably in the axial direction by penetrating the cylinder chamber, and a piston fitted into the cylinder chamber is provided in the middle part of the clamp shaft, and the lower end of the clamp shaft and 1. A mold clamping device for a mold filling machine, characterized in that a clamp claw and a clamp groove each having a shape that can be engaged with each other are provided on the lower end of the upper mold.