DE1479461C3 - A press consisting of an upper and a lower mold with a press table for the production of large-area plastic parts - Google Patents

Description

3 4

As a result, individual compression generators form double-acting generators 3 with a speed of around 2 cm /, which means that they pull the press table at the same speed as the two mold halves 5 and 7 come closer to each other after the press process is complete, until the filled one draws. These pistons, consisting of several cylindrical bodies of synthetic resin over the entire remaining molds, are distributed as a so-called stepped piston cavity and put under pressure, which is known per se. shot displaced from the closing joint and this training of a press according to the invention for finally has been closed with it. The counter-large plastic molded parts therefore provide for the idle paths, which are already heated in advance and permanently separated from the press paths, and the upper part of the further heated mold causes the heat to harden the molded material through the pressure and a mold half with detachable tension elements,
to be provided so that it can be closed quickly and then removed again after the hardening time has elapsed, although the locking position according to the clock, in mass production by Promente during demolding, cleaning and control of the loading program, the pressure effect of the pressure of the mold does not are bothersome in the way. The generator 3 is canceled, the press table 4 including the lower part, ie the form 5 known from conventional presses, sinks under its own weight or the columns and yokes are replaced by detachable connecting elements with the aid of retraction elements provided with stepped pistons. In doing so, the upper mold half is slowly brought downwards to cylinders 3 ', the next one being brought up in a straight line or hinge-like hardened pressed product loosing itself from the mold,
folded in and by means of the locking elements After loosening the tension elements 8, the lower mold is coupled with the holder 6, the upper mold 7 immediately starting the actual pressing stroke at high speed, so that both mold halves 5 and 7 are used below an embodiment of the removal of the pressed product, cleaning the hand of drawings described. See Fig. 1 form and reloading of the form with reinforcement and 2. ring and synthetic resin are freely accessible.

The press consists of a press frame 1 and 2, 25 The movement of the upper mold 7 can be hinge-like

which carries several pressure generator 3 on wel- take place; the pivot axis 10 can with adaptation

chen by means of a press table 4 a lower mold S to the height of the mold used higher and

can be raised and lowered. be set lower. The

A holder 6 carries an upper mold 7 and tension elements 8 can be adjusted. The pivot axis

this in a straight line or hinge-like movement 30 10 is during the pressing stroke of the pressing forces

to the lower mold 5. In this sub-form S not loaded at all.

the necessary reinforcements are inserted beforehand and the tension elements 8, which are used in conventional replace the necessary amounts of liquid synthetic resin and kata presses and the usual columns or yokes lysators have been introduced. make it possible that the upper mold 7 with the holding-In a certain distance from the lower mold 5 35 tion 6 can be moved quickly are either as If the upper mold 7 reaches a hook or eye that is exactly parallel to the fold-down hook, which mechanically, ren (5) running position and is actuated pneumatically or hydraulically by pulling elements 8 locked in this position. formed or consist of oversized ring dies The first phase of the closing movement must be screws with matching forks, which are more extraordinary Quickness take place until the outside 40 adjustable in the holder 6 and the press tool Point 9 the upper mold 7 the mirror of the liquid-stell 1 are installed. Through these eye bolts gen resin has almost reached. From then on, the fork openings slide mechanically the actual press stroke initiated, which by means of or pneumatically or hydraulically locking the on the press frame 1 arranged press bolt.

1 sheet of drawings

Claims (7)

Claims · mixed not already polymerized before counter-shape y; in, the position is, in. the dex.Preßhub begins. at 1. All known ones consisting of upper and lower form; Tressön is just a lock press with a press table to produce large-area speed up to a maximum of 17 cm / sec, what ger parts made of curable, preferably reinforced 5 are not sufficient to polymerize the resin Plastic compound with a large number of large-area pieces before the actual pressing process divided short-stroke pressure generator to prevent He-. ben and lowering of the lower mold, it is known to use the working and empty indicates that the upper mold (7) lift stroke run at different speeds or can be swiveled, can be left with the io during the pressing process, but the locking speed lower mold (5) with releasable tension elements of known devices, as outlined above, is sufficient. is lockable and. that the Preßdruckerzeü ^ - ,. leads, by far, to insert and remove large pressed pieces ger (3) individually or in groups. One mold half can be pressed into the press . ■, · ■ ·· - - ■: ■■; ■ immersed well, the speed should be about 2 cm / 2. Press' according to claim 1, characterized in that 15 see reduced so that a spillage of the marks that the upper mold (7) to a material and a shift of the glass fiber inlet plane of the press table (4). parallel axis (10) gene is avoided. The opening path should be equally pivotable. ^!; At high speeds, but in reverse 3. Press after. Claim 1 and 2, thereby being covered. indicates that in the press frame (1) sockets are already known, in the case of presses several relatively are arranged in which with the underside of the short-stroke pressing pressure generator over the pressing surface Slide the press table (4) firmly connected bolts. to distribute. In these known presses, the 4. Press according to claim 1 to 3, characterized in that the lower mold is filled outside the press station, it is indicates that the releasable Zugele- then the upper mold is lowered and the closed one elements are arranged around the press table (4). 25 form driven into the press station, whereupon the press 5. Press according to claim 1 and 4, characterized in that the lower mold is pressure generator against the supported one indicates that the pressure generator (3) and upper mold press. This version is for the Presdie Tension elements in relatively small parts perpendicular to the length of the mold are suitable, but not Axis planes are arranged. . for the manufacture of wagon roofs, caravans, 6. Press according to claim 1 and an ore 30 boats and the like, because such presses are excessively large several of the following claims, are characterized in that in addition to the charging station, they also have a indicates that the press table (4) have a fle- emptying station. The bumps on the xible plate. Forming tools, which are particularly useful for large-area 7. Press according to claim 1 and one or parts can occur in the known press several of the following claims, dadurch.ge- 35 are compensated, since the pressing force by several indicates that individual compression generators are applied distributed compression generators (3) as a pulling and pushing piston (stepped piston) (3 '). But it would be used today are trained. coming, hot-pressed raw materials because of the long period of time from filling in the synthetic resin 40 zes in the form up to the actual pressing process passes, the polymerization has already occurred, ■: ·: '.. · ■■ - before the pressing process even starts. With the present invention the object The subject of the invention is a top and can be solved with compensation of unevenness Lower mold of an existing press with a press table for the production of 45 molding tools the succession of empty spaces Large-area parts from hardenable, preferred and working stroke for presses for large-area parts wise reinforced plastic compound, shorten with a multitude. flatly distributed short-stroke pressure generator for The solution is that the upper mold Raising and lowering the lower mold. . can be raised or pivoted during the pressing process with the Polymerization resins have gained considerable significance with releasable tension elements because they can be used in conjunction with gel and that the pressure generators can be switched on and off individually, either in parts or in groups, for reinforcing materials such as glass fibers or the like,
can be processed, the advantageous property of the of some materials. So far press table can be pivoted parallel axis. However, there was a lack of devices which would enable the press table to be guided precisely in the press frame, and even larger pieces to be produced in the press process, advantageously provided with sockets in which with the gene , firmly ^ connected bolts, strengthened plastic parts should slide freely accessible molds. A preferred arrangement provides for having halves, od by column yokes Holme tension elements for holding together the upper and. The like. Neither the feed nor in the tire ⁶ ° lower mold during the actual pressing operation nigung and demolding disturbing and are in the way. to arrange the press table.
The idle paths of opening and closing the mold It is also advantageous to use the pressure generator and should, in particular, after the resin has been fed in front of the tension elements, be arranged in planes which run over the actual pressing process very quickly at right angles to the longitudinal axis of the mold. Consists of Preßden, since it only is possible, ⁶ 5 table here of a flexible plate, he can produce large parts in the pressing process. This fast closing of the surface of the lower mold during the pressing process is therefore necessary so that it fits and thus eliminates any shape irregularities during the hot pressing process, the resin-catalyst-giving. You can in the training according to the invention