JP2968576B2 - Solidification extrusion equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a solidification extrusion molding apparatus, and more particularly, to a method of adjusting the thickness of a melt-softened crystalline thermoplastic synthetic resin (hereinafter referred to as “resin”) plate. The present invention relates to a solidification extrusion molding device that can be freely molded.

[Prior art and its problems] Conventionally, there has been known a solidification extrusion molding method in which a resin, particularly a crystalline resin is melt-extruded and a back pressure is applied to form a predetermined shape by a former. When the thickness of the product is changed, the gap between the inner fossae of the former, that is, the space between the inner wall of the upper plate and the inner wall of the lower plate of the former is adjusted by replacing the side spacer constituting the former.

However, in the above method of adjusting the thickness, the former is first removed from the extruder and the take-off machine, and then the fixing bolts for fixing the upper plate, the lower plate and the side spacer of the former are removed, and then the spacer is adjusted. Then, since the fixing bolt must be screwed and the former must be connected to the extruder and the take-off machine, a large number of setup steps are required, and the operation loss of the extrusion molding equipment is enormous.

[Means for Solving the Problems] The present invention is an apparatus for solving the above problems,
The main point is that in a molding machine for applying a back pressure to a molten resin to form and solidify while extruding thermoplastic synthetic resin from an extruder, the former installed between the adapter at the extruder tip and the take-off machine is extruded. The fixed block, the connecting block, and the movable block are sequentially pivotally connected to each other via a connecting rod from the machine side, and at least one of the upper plate and the lower plate constituting the movable block is adjusted in thickness. A solidified extrusion molding apparatus characterized in that the apparatus is moved up and down by the apparatus to adjust the gap of the inner fossa of the movable block.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a side sectional view of the apparatus of the present invention, and FIG.
FIG. 3 is a front view taken along the line II-II in FIG.
FIG. 4 is an enlarged view of a section surrounded by line IV-IV in FIG.

As shown in the side sectional view of FIG. 1, the present invention melts and extrudes a resin A by an extruder 1 while braking a take-off machine 3 to apply a back pressure to the molten resin to form and solidify a plate-like body A ′. In the molding apparatus, the former 2 installed between the adapter 11 at the tip of the extruder 1 and the take-off machine 3 includes a fixed block 21, a connecting block 22, a movable block 23 and the like from the side of the extruder 1 as shown in FIG. As shown in an enlarged view, at least one of an upper plate 231 and a lower plate 231 'which are connected to each other via a connecting rod 212 and which constitutes the movable block 23 is connected to a thickness adjusting device. The movable block 23 can be moved up and down by 25, 25 'to adjust the gap of the inner fossae b of the movable block 23.

Fixed block 21 and connecting block 22 of the former 2
Are provided with an upper plate and a lower plate (211 and 211 ', 221 and 221') in which a cartridge heater or the like of a heating medium is provided, and an upper plate in which a cooling medium path is provided in the movable block 23. And the lower plates (231 and 231 ') are arranged in pairs vertically.

As shown in a plan sectional view in FIG. 3, the fixed block 21 is developed from the nozzle hole a opened from the adapter 11 side to the width of the inner cavity b by the spreader 210, and the upper plate 211 and the lower plate 211 'of the fixed block 21 are formed. The distance between is fixed.

As shown in FIG. 4, connecting rods 212 are attached to the connecting block 22 adjacent to the fixed block 21 at both ends of the upper and lower plates 221 and 221 'via appropriate number of key bolts 213, respectively. The distance between the upper plate 231 and the lower plate 231 'of the movable block 23 is adjusted in the direction of the arrow by pivotally connecting the concave block 214 formed in the fixed block 21 and the movable block 23 provided on both sides of the connecting block 22. I can do it.

Side plates 24 are attached to both sides of the former 2 to which the above blocks are connected, and the inner surface of the side plates 24 has at least a vertical width corresponding to the maximum adjustment interval and is at least A seal plate 241 is provided along the length range extending to the middle of the movable block 23, and the seal plate 241 can be finely adjusted in the horizontal direction by a push bolt 242 attached to the side plate 24.

Further, a membrane plate 20 is provided on the upper and lower inner wall surfaces from the fixed block 21 to the end of the movable block 23.

The seal plate 241 has a stainless steel plate surface bonded or coated with a fluorine-based resin such as Teflon, and the membrane plate 20 is made of a flexible Teflon sheet or a Teflon plate formed of upper and lower plates of each block. Laminated on the inner wall.

As shown in FIGS. 1 and 2, the thickness adjusting device of the present invention
25, 25 'move at least one of the upper plate 231 and the lower plate 231' of the movable plate 23 in the vertical direction, and rotate the adjustment bolts 252, 252 'to fix the fixed frames 251, 251' and the universal joint. One or both of the upper plate 231 and the lower plate 231 'can be moved up and down via 253, 253'.

The universal joints 253 and 253 'are used to move the upper plate 231 of the movable block 23 upward or the lower plate 231' downward to widen the gap in the cavity portion b. When the movable plate 231 is slid so as to absorb the shift to the left of the 221 'and the movable plate 231 is moved downward or the movable plate 231' is moved upward to narrow the internal cavity b, the connecting block 22 is The upper plate 221 or 221 'is configured to slide so as to absorb the rightward shift movement.

The solidification extrusion by the apparatus of the present invention will be described below.

As shown in FIG. 1, the molten resin A passes from the extruder 1 through the adapter 11 and the fixed block 21 of the former 2 which is heated, and is discharged from the nozzle hole a as shown in FIG. The movable block 23 is expanded to a portion b, and reaches the connection block 22 while being braked by the take-off machine 3, and then is formed to have a predetermined thickness in the cooled movable block 23. When the thickness of the molded product is to be increased during molding, the extruder 1 is stopped first, the take-off machine 3 is released to release the braking, and the push bolt 242 shown in FIGS. 2 and 3 is loosened. After releasing the seal plate 241, the adjustment bolt 252 is turned to raise (down) the upper plate 231 (lower plate 231 ′) of the movable block 23 to adjust the opening of the inner fossae b. And drive the extruder 1 and take it out at the same time. If the back pressure is adjusted by the take-off braking by the machine 3, the upper and lower surfaces of the molten resin A are smoothly guided by the membrane plate 20, and both side surfaces are smoothly guided by the seal plate 241. A high quality molded article can be obtained.

When the thickness of the molded product is changed to be thin, the resin A ′ formed and solidified in the former 2 is forcibly extracted by the take-off machine 3 after releasing the seal plate 241 in the above procedure, and then, By turning the adjustment bolt 252, the upper plate 231 (lower plate 231 ') of the movable block 23 is lowered (raised) to adjust the inner cavity b narrow, and then the push bolt 242 is tightened in the same manner as described above, and the extruder 1 and the take-off machine By driving 3 to adjust the back pressure to a predetermined value, it is possible to obtain a molded product of excellent quality which is switched to a thinner wall thickness.

[Effects of the Invention] The present invention has the above-described configuration, and thus has the following effects.

That is, the former used in the present invention has a fixed block, a connecting block, and a movable block connected in series, and when the movable block is moved up and down by a thickness adjusting device, a connecting rod mechanism for pivotally connecting the blocks, and The gap between the upper plate and the lower plate of the movable block can be easily and smoothly changed by the membrane plate, seal plate, etc. attached to the inner cavity of the former, so that a plate having the desired thickness can be efficiently solidified and extruded and produced. As described above, there is an effect that there is no need for a large number of setup man-hours and operation loss when changing the wall thickness, which greatly contributes to improvement in productivity.

[Brief description of the drawings]

1 is a side sectional view of the device of the present invention, FIG. 2 is a front view taken along the line II-II of FIG. 1, and FIG. 3 is a line III-III of FIG.
FIG. 4 is an enlarged view of a portion surrounded by a line IV-IV in FIG. 1 ... Extruder, 11 ... Adapter, 2 ... Former, 20 ... Film plate, 21 ... Fixed block, 211,221,231 ... Top plate, 211 ', 221', 231 '... Bottom plate, 212 ... Connecting rod, 22 ... Connecting block, 23 ... Movable block, 24 ... Side plate, 241 ... Seal plate, 242 ... Push bolt, 25,25 '... Thickness adjusting device, 252 ... Adjusting bolt 253: Universal joint, 3: Pick-up machine, a: Nozzle hole, b: Internal cavity

Claims (1)

(57) [Claims] In a molding apparatus for forming and solidifying a thermoplastic synthetic resin by applying a back pressure to a molten resin while extruding a thermoplastic synthetic resin from an extruder, a former installed between an adapter at an extruder tip and a take-up machine is provided. From the extruder side, a fixed block, a connecting block, and a movable block are sequentially pivotally connected to each other via a connecting rod, and at least one of an upper plate and a lower plate constituting the movable block is A solidified extrusion molding apparatus characterized in that a gap in an inner cavity of the movable block is adjustable by being moved up and down by a thickness adjusting device.