DE19546522A1 - Locking device for moulds used to support casings being foamed-out e.g. in refrigerator manufacture - Google Patents

Abstract

This new closure locks supportive moulds used in foaming-out refrigerator casings or doors. The lower section comprises base plate, side walls and contouring sections. The upper section carries moulding or contouring profiles. On the two opposite long side walls (3) of the lower section (2) a longitudinal torsion shaft (10) is mounted. It carries several swinging levers (4) with pressure rollers (6) at their far ends. In the upper section of the mould there are matching rests (7). These each have an undercut recess (9) accepting the roller (6). A run-on inclination (15) leads to a dead point (16) where the closure clips into position. Preferably a system of adjustment is included. This comprises bearing blocks for the torsion shafts which are adjusted by tie bars with turnbuckle sleeves, which are anchored low in the side walls.

Description

The invention relates to support molds for foaming refrigerators houses or doors, especially on support forms that are in one transport cycle system are used. Such known support forms exist at all essentially from two mold halves, the lower fixed mold half and the upper retractable mold half.

The lower half of the mold is firmly mounted on a base frame and settles preferably from a base plate with contour elements for the cabinet back wall and from side or end walls, some with contour elements are provided together.

The upper half of the mold that can be opened consists mainly of the upper mold part with the attached core for the inner contour of the housing. There is a Plenty of other variations and constructive solutions for design and opening construction of the support forms. For example, there are support forms in which one or more rere side parts are hinged, slidable or exchangeable. With all support molds, the mold is closed before foaming, i.e. H. the support form top part with the parts and elements arranged on it is based on the lower one Half of the mold on, all foldable parts are in their original, preferably brought vertical position. The upper mold part is then with the lower For half of the menu is locked to prevent the mold from tearing open during the foaming process avoid.

In the previously known solutions, the locking of the lower Half of the mold with the upper part of the supporting mold, as in OS 34 21 362 wrote, solved by means of spindles and screw connections. It is very time consuming dig and especially for a large number of shapes, such as. B. at one Transport circulation system very uneconomical.

Applications for locking slide systems are also known insert, which are attached to a mold half, when moving in Intervene with the corresponding counterparts of the other mold half and through then turn to create a positive connection.

The disadvantages of this solution are the high wear sensitivity of the friction pairing and unfavorable friction conditions due to sliding friction, which are high Exertion of force, especially when opening the mold.

The aim of the invention is a quick, low-wear locking of the two forms halves without much effort.

According to the invention the object is achieved in that in the upper area of the tenwalls of the lower support part, preferably on the two opposite several swivel levers with pressure rollers are arranged on the long sides, which are on a common torsion shaft. The swivel levers are on the upper part of the support mold with corresponding recesses, in the pressure rollers of the swivel levers when turning or swiveling the torsion snap the shaft into place. In this position, the upper and lower part of the support mold are together locked. The recesses are preferably designed with an undercut, i. H. that the pressure roller in the counter bearing after exceeding a top dead center continuous It is advantageous to use a thrust piece as the lower surface of the recess zen, which is adjustable in height and slightly inclined, and a run-on slope with top dead center, when the pressure roller is exceeded Takes locking position.

The turning or swiveling of the torsion shaft with the arranged on it Swivel levers are preferably via lever arms at the end of the torsion shaft realized, which are operated for example via working cylinders.

The torsion shafts are with the swivel levers in bearing blocks in the upper part richly stored the side wall. These bearing blocks are attached with a vertical arranged height-adjustable tie rod connected, its opposite End is anchored in the lower area of the side wall. Relieve the tension rods the side walls of the mold base by directly in the area of the swivel lever to absorb the tear forces during the foaming process.

There are overlaps on the upper part of the support mold to absorb the lateral forces with run-on bevels which, when the mold is closed, bring it into the vertical position press and hold there.

The invention is in the following embodiment with reference to drawing explained. In it show:

Fig. 1 supporting mold side view,

Fig. 2 supporting shape in section by locking mechanism,

Fig. 3 locking elements.

For locking the lower mold part 2 with the upper mold part 1 is in the upper region of the side walls 3 , preferably on the two opposite longitudinal sides, each one along the side wall 3 , supported by a torsion shaft 10 , on which several pivot levers 4 are fixedly arranged.

The pivot lever 4 is designed so that it sits rigidly with one leg on the gate sionswelle 10 , while there is a pressure roller 6 on the other leg. As a counterpart to the pivot levers 4, there are counter bearings 7 on the upper support part 1 , each with a pressure roller 6 of the pivot lever 4 receiving the recess 9 . When turning / pivoting of the torsion shaft 10, and thus when swinging of the pressure roller 6 in this recess 9 sitting support mold upper part 1 and supporting the lower mold part 2 firmly against each other and are locked together in this position.

Furthermore, the lower contact surface of the recess 9 is provided with a run-on slope 15 for the pressure roller 6 and an upper dead center 16 , which is to be overcome when locking the pressure roller 6 and causes the pressure roller 6 in when foaming and further transporting the support form this position is fixed.

As a lower contact surface of the recess, a wear-resistant run-on piece 8 with the aforementioned run-up slope 15 and the top dead center 16 is advantageously used, which is preferably arranged at a slightly inclined height. For adjustment and height adjustment is in the counter bearing under the thrust piece 8 after a set screw 14th

The torsion shaft 10 is supported by bearing blocks 5 which are attached to the side wall 3 or in recesses in the side wall 3 . It is expedient for the pivot lever 4 in the area of the bearing block 5 on the torsion shaft 10 is Stigen to BEFE. In addition, this bearing block 5 is connected to the upper end of an adjustable tie rod 12 which is anchored at its opposite lower end in the lower region of the side wall 3 . The height adjustment is implemented, for example, with turnbuckle nuts 13 . At the same time the tearing forces on the support form are intercepted via this pull rod 12 .

Each torsion shaft 10 projects with one end beyond the side walls 3 of the support mold. At this end there is a two-sided lever arm 11 which is actuated by a working cylinder and via which the torsion shaft 10 is rotated or pivoted.

With this inventive solution is a simple, quick and safe locking gels possible with little effort.

Reference list

1 support mold top
2 support mold lower part
3 side wall / lower support part
4 swivel levers
5 bearing block
6 pressure roller
7 counter bearing
8 thrust piece
9 recess
10 torsion shaft
11 two-sided lever arm
12 tie rod
13 turnbuckle nut
14 adjuster screw
15 bevels
16 top dead center
17 changes

Claims (7)

1. Locking for foam molds, in particular support molds, for foaming refrigeration cabinet housings or doors, which consists of a lower mold part, which consists of a base plate, the side walls or part of the side walls and contour elements, and an upper mold part with the mold or Assembling the contour parts, characterized in that a torsion shaft ( 10 ) guided along at least two side walls ( 3 ) of the lower support part ( 2 ), preferably on the two opposite longitudinal sides, is mounted on the upper region of the side wall ( 3 ) and preferably has a plurality of pivot levers ( 4 ), which are rigidly attached to the torsion shaft with one leg, a pressure roller ( 6 ) is located on the opposite leg of the swivel lever ( 4 ) and is used as a counterpart to each swivel lever ( 4 ) in the upper support part ( 1 ) counter bearing ( 7 ) are the one, the pressure roller ( 6 ) receiving, rear have cut-out recess ( 9 ), the lower bearing surface of the recess ( 9 ) having a run-on slope ( 15 ) and an upper dead center ( 16 ) to be overcome for engagement. 2. Device according to claim 1, characterized in that for mounting the torsion shaft ( 10 ) in the upper part of each side wall bearing blocks ( 5 ) are attached. 3. Apparatus according to claim 1 and 2, characterized in that to intercept the tearing forces, the bearing blocks ( 5 ) are each connected to a pull rod ( 12 ) which is anchored at its opposite end in the lower part of the side wall. 4. Apparatus according to claim 1 to 3, characterized in that the pull rod ( 12 ) is preferably adjustable in height by means of turnbuckle nuts ( 13 ). 5. The device according to claim 1, characterized in that a wear-resistant thrust piece ( 8 ) is used by means of inclination height adjustable in the counter-surface ( 7 ) as the lower contact surface of the recess ( 9 ). 6. The device according to claim 5, characterized in that at least one adjusting screw ( 14 ) is arranged for height adjustment in the counter bearing ( 7 ) under the thrust piece ( 8 ). 7. The device according to claim 1 to 5, characterized in that for absorbing the lateral forces on the mold upper parts ( 17 ), preferably with bevels, are arranged so that they protrude above the upper part of the side walls.