JPH0353864Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a mold clamping method used in liquid reaction molding to produce a foam molded material by injecting a liquid material into a cavity formed by an upper mold and a lower mold. This invention relates to a mold clamping device for liquid reaction molding.

[Prior art] This type of mold clamping device for liquid reaction molding was developed in 1983.
It is known from Japanese Patent Publication No. 33789, Japanese Patent Publication No. 54-29542, etc. The mold clamping machine can be tilted in multiple directions with the upper and lower molds clamped in order to exhaust the gas in the mold cavity, and can be tilted in multiple directions with the upper and lower molds clamped together to exhaust the gas in the mold cavity. It is necessary to tilt it back and forth with the two separated.

Conventional mold clamping machines have a structure in which the entire mold clamping machine body with the upper mold and lower mold attached is tilted back and forth and left and right.

[Problems to be solved by the invention] For this reason, the weight of the structure to be tilted becomes extremely large, the size of the device increases, and the electric power required to drive the device becomes large, making it uneconomical. There was a problem. In addition, the space for installing and tilting the mold clamping machine was large, which caused problems in terms of space.

In reality, it is necessary to tilt the upper and lower molds for degassing and for cleaning, and the upper and lower surface plates to which they are attached, and there is no need to tilt the other parts. Since no such structure could be found, conventionally the entire mold clamping machine body was tilted.

The present invention uses a tilting structure for the minimum number of members, in other words, prevents the entire mold clamping machine from tilting.
The objective is to alleviate the economic and space problems mentioned above.

[Means for solving the problems] According to the present invention, the means for solving the above problems are as follows: (a) a fixed upper support and a lower support; (b) a fixed upper support and a lower support; (c) A movable platen located on the side and moved up and down with respect to the upper support by a platen lifting cylinder; (d) an upper surface plate, on which the upper mold is removably attached via an upper mold die clamp, and which is tilted by an upper surface plate tilting cylinder; (e) a sub-plate which is tiltably connected to the lower support and is tilted by a sub-plate tilting cylinder; The lower surface plate is pivotally connected to the upper mold, the lower mold is attached to the upper side, and the lower surface plate is tilted by the lower surface plate tilting cylinder, and (f) the upper mold and the lower mold can be clamped and opened. A mold clamping device for liquid reaction molding includes a mold clamper attached to a lower surface plate for clamping the mold; and a mold clamping device for liquid reaction molding.

[Function] In the mold clamping device for liquid reaction molding of the present invention, the original clamping of the upper and lower molds is performed by lowering the movable platen, upper surface plate, and upper mold until the upper mold contacts the lower mold, and This is done by tightening the mold and the lower mold using a mold clamper, and injection molding is performed in this state.

To vent gas in the cavity formed by the upper and lower molds, with the upper and lower molds still clamped by the mold clampers, open the upper mold die clamp, remove the upper mold from the upper surface plate, and remove the upper mold from the upper surface plate. The surface plate and the movable platen are lifted upward by a platen lifting cylinder, and in this state, the lower surface plate to which the upper and lower molds are attached is tilted in the front and back direction by a lower surface plate tilting cylinder, This is done by tilting the lower surface plate along with the sub-plate in the left-right direction using a sub-plate tilting cylinder. This multi-directional tilting eliminates the need to tilt the entire molding machine main body by tilting only the upper and lower molds and lower surface plate or sub-plate.

To clean the upper and lower molds, remove the clamps of the upper and lower molds using the mold clamper, lift the movable platen, upper surface plate, and upper mold upward and away from the lower mold. The lower mold side is tilted in the front and back direction around the upper surface plate tilting main pin by the upper surface plate tilting cylinder, and the lower mold side is tilted downward around the surface plate tilting main pin. The surface plate is tilted back and forth using a tilting cylinder, and each mold is cleaned in this state. The respective tilting movements of the upper mold and the lower mold involve the tilting of the upper surface plate and the lower surface plate, and there is no need to tilt the entire molding machine main body.

[Embodiments] Hereinafter, preferred embodiments of the mold clamping device for liquid reaction molding according to the present invention will be described with reference to the drawings.

1 to 5 show the structure of the device of the present invention and its operating state.

In FIGS. 1 to 4, the upper support 1 and the lower support 2 are arranged in a vertical relationship with each other,
They are immovably connected to each other via guide rods 21 to form a fixed frame. A movable platen 3 is located below the upper support 1, and a guide rod 2
It can be moved up and down by sliding it to position 1. A platen lifting cylinder 10 is fixed to the upper support 1, and its rod is connected to the movable platen 3.
The movable platen 3 is moved up and down by driving the platen lift cylinder 10.

An upper surface plate 4 is disposed below the movable platen 3, and the upper surface plate 4 is pivotally connected to the movable platen 3 by an upper surface plate tilting main pin 18 so as to be tiltable in the front-rear direction. An upper surface plate tilting cylinder 11 is fixed to the movable platen 3, and its rod is connected to the upper surface plate 4.
, the upper surface plate 4 is tilted in the front-rear direction around the upper surface plate tilting main pin 18.

An upper die 5 is removably attached to the lower side of the upper surface plate 4 by an upper die clamp 9. The upper die 5 is fixedly held on the upper surface plate 4 by the clamp of the upper die clamp 9, and the upper die 5 is unclamped.
is removed from the upper surface plate 4.

A sub-plate 17 is placed above the lower support 2, and one end of the sub-plate 17 in the left-right direction is pivotally connected to the lower support 2 by a sub-plate main pin 15 so as to be tiltable in the left-right direction. The upper end of the rod of the sub-plate tilting cylinder 16 is connected to the other end. By driving the sub-plate tilting cylinder 16, the sub-plate 17 is tilted in the left-right direction around the sub-plate main pin 15.

A lower surface plate 6 is disposed above the sub-plate 17, and the lower surface plate 6 is pivotally connected to the sub-plate 17 by a lower surface plate tilting main pin 14 so as to be freely tiltable in the front and rear direction. The upper end of a rod of a lower surface plate tilting cylinder 12 is connected to the lower surface plate 6, and the lower surface plate 6 is tilted in the front and rear direction by driving the lower surface plate tilting cylinder 12. Ru.

A lower mold 7 is attached and fixed to the upper side of the lower surface plate 6. A mold clamping clamper 8 is attached to the lower surface plate 6, and the mold clamping clamper 8 holds the upper mold 5 and the lower mold 7.
The mold is clamped, and the mold is clamped so that it can be opened.

In addition, on the lower surface side of the lower surface plate 6, a lower surface plate vertical guarantee piece 19 is connected to a lower surface plate guarantee piece drive cylinder 2.
It is set in place by 0.

Next, the operation of the above embodiment will be explained.

Full original position...FIG. 5A The movable platen 3 is raised by the platen lifting cylinder 10 and stopped at the lifting end. The upper surface plate 4 attached to the movable platen 3 can be tilted at a certain angle from the center of the mold clamping machine by the upper surface plate tilting cylinder 11 using the upper surface plate tilting main pin 18 as a fulcrum. Since the upper die 5 is fastened to the upper die surface plate 4 by the upper die clamp 9, it is also in an inclined state. The lower die is fastened to the lower surface plate 6 and is located on the center line of the mold clamping machine.

Start of upper mold closing...Fig. 5B The upper mold surface plate 4 returns to the center position of the mold clamping machine. Next, the lower surface plate 6 uses the lower surface plate tilting main pin 14 as a fulcrum,
The lower surface plate is tilted by a tilting cylinder 12 at a certain angle from the center position of the mold clamping machine. At this point, the lower mold 7 can be cleaned and a release agent can be applied.

Start of automatic operation...Fig. 5C By pressing the automatic operation start button, the lower surface plate 6 returns to the center position of the mold clamping machine. The movable platen 3, upper surface plate 4, and upper mold 5 are guided by a guide rod 21 and lowered by a platen lifting/lowering cylinder 10, and the upper and lower molds 5, 7 meet at the center of the mold clamping machine. Next, the upper die clamp 9 becomes unclamped. At this point, the upper surface plate 4 and the upper die 5 are uncoupled. When the upper and lower molds 5 and 7 are in the mating state, the clamping clamper 8 attached to the lower surface plate 6 is activated to enter the clamping state and firmly fasten the upper and lower molds 5 and 7. do.

During automatic operation...FIG. 5D The movable platen 3 and upper surface plate 4 are raised to the upper end by the platen lifting cylinder 10.
Next, the lower mold 7 and the upper mold 5, which are fastened to the lower surface plate 6 by the mold clamper 8, are moved to the lower surface plate tilting cylinder 12 using the lower surface plate tilting main pin 14 as a fulcrum. Therefore, it tilts in the front-back direction.

During automatic operation...Fig. 5E In addition, tilting to the left or right is performed using the sub-plate tilting cylinder 16 using the sub-plate main pin 15 as a fulcrum.
The sub-plate 17 is tilted by. Naturally, the lower surface plate 6 on the sub-plate and the upper and lower molds fastened thereto are also inclined. In this state,
A reactive mixture is poured into the mold.

During automatic operation...Figure 5F When the injection of the reactive mixture into the mold is completed, the lower surface plate 6, the lower mold 7 and the upper mold 5 fastened thereto return vertically to the center position of the mold clamping machine. At that point, the lower surface plate verticality guaranteeing piece 19 has already been set in place on the lower surface of the lower surface plate 6 by the lower surface plate verticality ensuring piece driving cylinder 20, so that the mold clamping machine is centered. However, verticality is always guaranteed. Next, moveable platen 3
The upper surface plate 4 attached thereto descends, contacts the top surface of the upper mold, and stops at the same time as the mold clamper 8.
is unclamped, and at the same time, the upper mold die clamp 9 operates to clamp the upper mold.

End of automatic operation...Fig. 5G With the upper die 5 clamped to the upper surface plate 4,
A platen lifting cylinder 10 together with a movable platen 3
and stops at the rising end. Since the lower mold 7 is fastened to the lower surface plate 6, the upper mold 5 clamped to the upper mold surface plate 4 is tilted about the upper surface plate tilting main pin 18 as a fulcrum. At this point, the molded article can be demolded from the upper mold 5, the upper mold 5 can be cleaned, and a mold release agent can be applied at the same time.

This completes one cycle of operation, and again
The state returns and the next cycle begins.

Depending on the molded product, angled injection may not be necessary. At that time, in state C in FIG. 5, by pressing the automatic operation start button, the lower surface plate 6 returns to the center position of the mold clamping machine.

Next, the movable platen 3, upper surface plate 4, and upper die 5 are guided by the guide rod 21 and lowered by the platen lifting/lowering cylinder 10, so that the upper and lower dies meet at the center of the mold clamping machine. The movable platen 3, upper surface plate 4, and upper die 5 are in contact with the lower die 7 and maintain a pressurized state.

Thereafter, the mold clamper 8 enters the clamping state and firmly clamps the upper and lower molds 5 and 7. The upper die clamp 9 is kept in a clamped state, and there is no need to unclamp it. In this state, injection of the reactive mixture into the mold can begin. When the injection is completed, the mold clamper 8 becomes unclamped, and the movable platen 3, upper surface plate 4 and upper mold 5
is lifted up by the platen lift cylinder 10 and enters the state G in FIG. 5, allowing the cycle to continue.

[Effects of the invention] The longitudinal and horizontal inclinations of conventional mold clamping machines were structured so that the mold clamping machine body was tilted.

In this embodiment, the upper and lower molds 5 and 7 are fitted and clamped, and instead of tilting the mold clamping machine body, only the mold portion is tilted.

Therefore, (a) the weight of the structure to be tilted is extremely reduced, which is economically advantageous;

(b) Since the tilted part is inside the mold clamping machine body,
It has a compact structure and is advantageous in terms of space.

(c) Conventionally, the mold clamping force relied on the platen lifting cylinder, but in this invention, the mold clamping force is applied to the mold clamping clamper 8 used for the upper and lower molds 5 and 7 clamps, so the capacity of the platen lifting cylinder 10 is reduced. Up·
The capacity is sufficient to overcome the separation force of the lower molds 5 and 7, the weight of the movable platen 3, the upper surface plate 4, the upper mold 5, and the frictional force between the guide rod 21. Moreover, the structure of the upper support body 1, movable platen 3, upper surface plate 4, and guide rod 21 can be simplified, and a mold clamping machine that is extremely economically advantageous can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of a mold clamping device for liquid reaction molding according to an embodiment of the present invention, Fig. 2 is a side view of the device shown in Fig. 1, and Fig. 3 is a top and bottom view of the device shown in Fig. 1 showing back and forth tilting. 4 is a side view of the vicinity of the mold; FIG. 4 is a front view of the vicinity of the upper and lower molds showing left and right tilting in the apparatus of FIG. 1; FIGS. 5A, B,
C, D, F, and G are side views of the vicinity of the upper and lower molds showing the operating order of the apparatus shown in FIG. 1, and FIG. 5E is a front view of the vicinity of the upper and lower molds showing the operating order of the apparatus shown in FIG. 1...Upper support, 2...Lower support, 3...
Movable platen, 4...Upper surface plate, 5...Upper mold, 6
... lower surface plate, 7 ... lower mold, 8 ... mold clamper, 9 ... upper mold die clamp, 10 ... platen lifting cylinder, 11 ... upper surface plate tilting cylinder,
12...Lower surface plate tilting cylinder, 14...Lower surface plate tilting main pin, 18...Upper surface plate tilting main pin.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) A fixed upper support and a lower support, and (b) A platen lifting cylinder located below the upper support that moves up and down with respect to the upper support. (c) A movable platen located below the movable platen, pivotally connected to the movable platen by an upper surface plate tilting main pin, and an upper mold attached to the lower side removably via an upper die clamp. (d) a sub-plate tilting cylinder 16 located above the lower support and tiltably connected to the lower support;
(e) The sub-plate 17 is located above the sub-plate and is pivotally connected to the sub-plate by the main pin for tilting the lower surface plate, the lower die is attached to the upper side, and the lower mold is attached to the lower surface plate. A lower surface plate that is tilted by a tilting surface plate cylinder; A mold clamping device for liquid reaction molding, comprising: a clamper;