JPH0415447Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a resin sheet molding machine equipped with an intermittent-moving clamp chain having triangular jaws, and the resin sheet is forced to bite into the triangular jaws. This invention relates to a sheet biting forcing device for a clamp chain that has triangular claws that prevent relative backward movement that delays feeding.

(Prior art) In a device for feeding a resin sheet using a clamp chain that protrudes a triangular claw with a vertical front edge in the feeding direction, when the temperature of the resin sheet is high and the sheet rigidity is low, as shown in FIG. resin sheet a
is only deformed and does not stick into the triangular pawl b, and it becomes easier to slide backwards in the feeding direction and in the direction crossing the feeding direction, so the amount of movement of the resin sheet is less than the amount of movement of the clamp chain, ensuring synchronous conveyance. This has the disadvantage that it is not possible to do so, and this causes misalignment between the molding die and the resin sheet, and the misalignment accumulates over a long period of time during the molding operation. In order to eliminate this drawback, there is a device in which a freely rotating presser roll r is provided at the starting end of the clamp chain and a groove into which the triangular claws are inserted is formed on the circumferential surface of the roll, as shown in Fig. 8, but in this case, Because the insertion is forced very rapidly, the resin sheet a stretches and does not pierce completely as shown in the figure, but after the resin sheet a passes through the presser roll r, it floats up in the direction of coming out from the triangular claw. As in the case of FIG. 7, the transfer cannot be stabilized, so the disadvantage is that it is necessary to check the degree of penetration between the clamp chain and the resin sheet and to adjust the presser roll r during the molding operation.

(Problems to be Solved by the Invention) The present invention eliminates the drawbacks of the conventional techniques described above, and eliminates the loss of melting heat during sheet extrusion, especially in large-scale equipment that combines a sheet extruder and a resin molding machine. The problem is to improve the above-mentioned poor alignment which has become extremely noticeable due to the resin sheet being inserted in contact with the triangular claws of the clamp chain.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems. Specifically, the leading edge in the feeding direction is made almost vertical, and the leading edge is In a resin sheet feeding device equipped with an intermittent-moving clamp chain having a back surface that slopes downward in sequence and a large number of triangular claws, a large number of pressing members are provided with biting grooves that span the triangular claws of the clamp chain. The clamp chain is provided so as to face a plurality of triangular jaws in the feed direction from the feed side starting end of the chain, and the pressing members are arranged in an inclined arrangement so as to sequentially increase biting into the triangular claws as they move from the start end toward the feed direction of the clamp chain. It is characterized by the fact that

(Example) Embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 3 shows the arrangement positions of a large number of pressing members 10 of the present invention, in which a resin sheet a extruded from an extruder nozzle b and whose thickness has been adjusted by a calender roll c is stretched and contracted with a dancing roll e. The roll f is sent to a telescopic clamp chain d which is connected to a telescopic mechanism that moves in unison, and an endless clamp is connected to sprockets 1 and 2 provided at the front (left side in Fig. 3) and the same rear of the forming device k. The pressing member 10 is placed above the starting end 4 of the chain 3.

Resin sheet a extruded from extruder nozzle b
Since the thickness is not suitable for forming from the beginning of extrusion, the detection roll pair g is applied to the sheet a at the beginning of the extrusion operation, and the telescopic clamp chain d is detected by the signal generated while the detection roll pair g is applied. The table h that sends out the resin sheet a is lowered, and the cutter device i is operated at regular time intervals to cut the resin sheet a into a fixed length, and the cut resin sheet a' is placed from the lowered table h into the collection box j. is discharged and collected, and when the resin sheet a stabilizes at a thickness suitable for molding, it is detected by the detection roll g, and the roll pair g is separated from the resin sheet a as shown in FIG. 3, and at the same time, the table h is The cutter i is returned to the horizontal position and stopped, and this operation is shown in FIG.

As shown in FIG. 2, the clamp chain 3 has a reciprocating running part fitted into the guide rail 5, and is provided in pairs on the left and right sides perpendicular to the feeding direction.
As shown in FIG. 1, triangular claws 7 are protruded from every other chain link 6, with the front edge 8 in the feeding direction being almost vertical, and the rear part of the front edge 8 having a spine 9 that slopes sequentially downward. do.

A large number of pressing members 10 are arranged in a group, and a pair of pressing members 10 are provided at every other chain link 14 of a short endless chain 13 which is connected to the starting end 4 of the clamp chain 3 and the sprockets 11 and 12 provided in the feed direction thereof. A holding piece component 16 is attached between the pinching pieces 15, 15, and as shown in FIGS. With the provided sprocket 1
Between 1 and 12, the chain roller 18 is guided by upper and lower guide rails 19 and 20, and the endless chain 1
About 8 to 12 biting grooves 17 are provided in the lower running part between the sprockets 11 and 12 of No. 3, and the lower guide rail 19 is inclined to form the biting grooves 17 at the starting end 4.
A gap 21 for inserting the resin sheet a is created between the and the triangular pawl 7, thereby creating an inclined arrangement 22 in which biting into the triangular pawl 7 increases sequentially in the feeding direction of the chain link 6.

In this embodiment, when the resin sheet a has a thickness suitable for molding and the table h changes its angle from the angle shown in FIG. 4 to the angle shown in FIG. 3 is sent out to the starting end 4 of 3. However, at the starting end 4, a large number of pressing members 10 are arranged in the feeding direction, and these pressing members 10 are provided with biting grooves 17 that respectively straddle the triangular claws 7 of the clamp chain 3. Starting end 4 of clamp chain 3
Since the biting grooves 17 are arranged in an inclined manner so that the biting depth of the biting grooves 17 into the triangular pawls 7 increases sequentially in the feeding direction, the biting grooves 17 do not straddle the triangular pawls all at once, and the resin sheet a is pressed against the pressing member 10. Since the triangular pawl 7 is loosely fitted into the biting groove 17 and the resin sheet a is gradually inserted into the triangular pawl 7, even after it is separated from the pressing member 10, the resin sheet a remains in the triangular pawl 7 due to its repulsive force. The transfer shown in Figures 5 and 6 is carried out without floating up.

(Operations and effects of the invention) The functions of the invention are as described in the Examples section.

As clarified above, the present invention includes a plurality of pressing members 10 facing in the feeding direction from the starting end 4 of the known clamp chain 3, which has a protruding triangular claw 7 that penetrates the edge of the resin sheet. The resin sheet a is not inserted into the triangular claws 7 all at once, but is inserted gradually into the triangular claws 7 by the biting grooves 17 provided on each of the pressing members 10 so as to straddle the triangular claws. Therefore, even if the resin sheet has repulsive elasticity that makes it difficult to penetrate the triangular nail, this elasticity can be canceled and the insertion can be performed, and even if the resin sheet becomes soft due to heat, it can be easily inserted during feeding. This has the effect that the resin sheet is not lifted up toward the sharp tip of the triangular claw, and the clamp chain 3 can be moved quietly and accurately in the feeding direction of the resin sheet a. .

[Brief explanation of the drawing]

Figures 1 to 6 of the accompanying drawings show an embodiment of the present invention, with Figure 1 being a partially cutaway side view and Figure 2 being a side view of Figure 1A.
-A longitudinal sectional view, FIG. 3 is a schematic side view showing the arrangement position of the pressing member 10, and FIGS. 4 to 6 are action explanatory views. FIG. 7 is a front view showing the drawbacks of the conventional device, and FIG. 8 is a side view of the conventional device equipped with a pressure roll r. 3...clamp chain, 4...starting end, 7...
Triangular claw, 8... Front edge, 9... Spinal surface, 10... Pressing member, 17... Biting groove, 21... Gap, 22...
Tilt array.

Claims (1)

[Scope of utility model registration request] In a resin sheet feeding device equipped with an intermittent-moving clamp chain having a front edge in the feeding direction that is substantially vertical and a rear part of the front edge having a back surface that slopes downward in sequence, the clamp chain is A large number of pressing members each having a biting groove extending over the claws are provided from the starting end on the feeding side of the chain to face the plurality of triangular claws in the feeding direction, and these pressing members are inserted from the starting end in the feeding direction of the clamp chain. A sheet biting forcing device for a clamp chain having a triangular pawl, characterized in that the biting groove of the biting groove toward the triangular pawl is arranged in an inclined manner so as to gradually increase the biting depth toward the triangular pawl.