DE10340959A1 - Positive tool for vacuum forming stud plates used to lay heating and cooling pipes has pegs comprising a sleeve and upper flexible disc with radial segments fitted onto pins on tool baseplate - Google Patents

Abstract

Pegs(13) on the tool comprise a cylindrical sleeve(14), a flexible disc(15) with radial strip-like segments(16,18) and a downward facing cylindrical extension(20) with radial ring(22). The disc is inserted from above into a broadened upper section(24) of a bore(23) in the sleeve. The ring(22) engages an annular groove(25) in the bore. Pegs(13) on the tool comprise a cylindrical sleeve(14), a flexible disc(15) with radial strip-like segments(16,18) and a downward facing cylindrical extension(20) with radial ring(22). The disc is inserted from above into a broadened upper section(24) of a bore(23) in the sleeve. The ring(22) engages an annular groove(25) in the bore. Disc segments(16,18) positively engage recesses in the sleeve upper edge and the disc upper side is flush with the latter. Each sleeve fits a peg(30) on a baseplate(12) and is secured. The segments(16,18) of the flexible disc(15), face radialy outwards and produce outward facing projections on each stud on a stud plate. Each sleeve(14) with a disc is attached to a baseplate pin(30) with a grub screw.

Description

The The invention relates to a positive mold for vacuum forming a cam plate from a plastic film for laying plastic pipes of the heating or cooling circuits of area heating and cooling installations, with massive, upstanding from a base plate in a grid Mold cam, at the upper peripheral edge at least two outwardly projecting Form segments are arranged, wherein the mold segments by a flexurally elastic, attached to the form cam disc can be formed and the flexural rigidity of the disc is set such that their Mold segments their outward directionally maintained position substantially when a plastic film through vacuum over the shape cam is pulled, creating a cam plate with hollow Holding cam is formed, which protrudes at the upper peripheral edge to the outside Fixing tabs for the too having laying tubes, and the mold segments of the shape cam the positive mold when pulling a finished molded cam plate with up the hollow holding cam to release it.

At one in the EP 0 581 092 B1 described positive form of this type, the mold segments of the shape of cams are formed by a flexurally elastic disc, which is divided into four mutually perpendicular strips which emanate radially from a central part with a central hole. A bolt with a molded flat head is used to attach the disc to the end face of the mold cam by the bolt is driven through the central hole of the disc in an axial bore of the mold cam.

The Production of this known positive mold and the replacement required by a damage the flexurally elastic disks of the mold forming the mold segments of Forming shape cam is relatively expensive. Furthermore, the construction of the positive mold requires that the head surface of the hollow cams of the manufactured cam plates imprints of the Head of the fixing bolt of the shape cam and footprints of the disc Strip of the disc has.

Of the Invention is based on the object, the generic positive form for vacuum forming of cam plates with a view to simplified production to improve.

These The object is achieved by a positive mold with the features of claim 1.

The under claims include advantageous and expedient developments of the invention.

The The invention is explained below with reference to drawing figures which represent:

1 a fragmentary perspective view of a cam plate,

2 a side view of a retaining cam the cam plate,

3 a side view of a mold cam of the positive mold according to the invention with a plastic film section at the beginning of the vacuum forming process,

4 one of the 3 corresponding side view during removal of the finished cam plate,

5 a partially broken, perspective, enlarged view of a mold cam of the positive mold for the production of cam plates and the

6 and 7 perspective views of the individual parts of a mold cam of the positive mold.

The cam plate 1 made of plastic after the 1 and 2 for laying plastic pipes 2 the heating circuits of a room heating system has a base plate 3 with this towering, hollow holding cam 4 for the pipes 2 on.

The retaining cams 4 have a cylindrical jacket 5 , The laid plastic pipes 2 lie on the base plate 3 the cam plates 1 on and through the cylindrical coats 5 and through at the upper peripheral edge 7 the retaining cam 4 radially outwardly directed fixing projections 8th - 10 arranged in a certain grid retaining cam 4 on the cam plates 1 fixed.

The in the 3 and 4 partially represented positive form 11 made of metal or plastic for the production of the cam plates 1 is through a base plate 12 and on this arranged in a particular grid massive shape cam 13 educated.

The shape cams 13 the positive form 11 consist of a cylindrical sleeve 14 and a flexurally elastic disc 15 with three radially outwardly directed, strip-shaped mold segments 16 - 18 and one to the middle part 19 the disc 15 molded, downwardly directed, cylindrical approach 20 with one at the bottom 21 is molded, outwardly directed retaining ring 22 ,

The disc 15 is with the cylindrical approach 20 from the top into an extended, upper section 24 the cylindrical bore 23 the sleeve 14 used, with the retaining ring 22 the disc 15 in a corresponding annular groove 25 the sleeve bore 23 snaps over the sleeve circumference 26 radially outwardly projecting mold segments 16 - 18 the disc 15 from corresponding recesses 28 in the upper sleeve edge 27 be received positively and the top 29 the disc 15 flush with the upper edge of the sleeve 27 concludes.

The pods 14 the shape cam 13 are together with the the form segments 16 - 18 having discs 15 positive fit to corresponding massive pin 30 the base plate 12 the positive form 11 pushed on and on the pin 30 by means of grub screws 31 attached.

The with the shape segments 16 - 18 equipped windows 15 the shape cam 13 the positive form 11 are manufactured as plastic injection molded parts.

The flexural rigidity of the disc 15 the shape cam 13 the positive form 11 is set so that the mold segments 16 - 18 the disc 15 their radially outward position substantially retained when a clamped in a mold frame plastic film 32 by a suction channels, not shown in the base plate 12 the positive form 11 generated vacuum in the direction of arrow a on the shape cam 13 is pulled, creating a cam plate 1 with hollow cradles 4 is formed at the upper peripheral edge 7 radially outwardly projecting Fixiervorsprünge 8th - 10 for the pipes to be laid 2 have, and the mold segments 16 - 18 the shape cam 13 the positive form 11 when removing a finished shaped cam plate 1 with the hollow cams 4 up in the direction of arrow b to release the retaining cams ( 3 and 4 ).

1

cam plate

2

Plastic pipe

3

baseplate

4

holding cams

5

cylindrical jacket of 4

7

upper peripheral edge of 4

8th

Fixing projection on 7

9

Fixing projection on 7

10

Fixing projection on 7

11

positive mold

12

Base plate of 11

13

Shape cams of 11

14

cylindrical sleeve of 13

15

Slice of 13

16

Shape segment of 15

17

Shape segment of 15

18

Shape segment of 15

19

Middle part of 15

20

cylindrical approach 19

21

lower end of 20

22

retaining ring

23

cylindrical bore of 14

24

upper section of 23

25

Ring groove of 23

26

Scope of 14

27

upper sleeve edge of 14

28

Recess in 27

29

Top of 15

30

Tang on 12

31

grub screw

32

plastic film

a

Deformation direction of 32

b

Stripping direction of 1

Claims (4)

Positive mold for vacuum forming a cam plate of a plastic film for laying plastic pipes of the heating or cooling circuits of surface heating and cooling installations, with a base plate in a grid upstanding, solid shape cam, at the upper peripheral edge at least two outwardly projecting mold segments are arranged wherein the mold segments are formed by a flexurally elastic disk secured to the mold cam and the flexural rigidity of the disk is determined such that its mold segments substantially maintain their outward position when a plastic film is vacuum drawn over the mold cams, thereby forming a cam plate is formed with hollow retaining cams having at the upper peripheral edge outwardly projecting fixing projections for the pipes to be laid, and the mold segments of the positive shape mold cams when removing a finished shaped cam plate with the hollow retaining cams for release d up the same, characterized in that the shape cams ( 13 ) of the positive form ( 11 ) a cylindrical sleeve ( 14 ) and a flexurally elastic disc ( 15 ) with at least two outwardly directed, strip-shaped mold segments ( 16 . 17 ) and one to the middle part ( 19 ) formed, downwardly directed, cylindrical approach ( 20 ) with one at the lower end ( 21 ) formed, outwardly directed retaining ring ( 22 ), the disc ( 15 ) with the cylindrical approach ( 20 ) into an extended upper section ( 24 ) of the cylindrical bore ( 23 ) of the sleeve ( 14 ) is inserted from above, wherein the retaining ring ( 22 ) of the disc ( 15 ) in a corresponding annular groove ( 25 ) of the sleeve bore ( 23 ) engages over the sleeve circumference ( 26 ) outwardly projecting mold segments ( 16 - 18 ) the shit be ( 15 ) of corresponding recesses ( 28 ) in the upper sleeve edge ( 27 ) are positively received and the top ( 29 ) of the disc ( 15 ) flush with the upper sleeve edge ( 27 ) and that the sleeves ( 14 ) of the shape cam ( 13 ) together with the mold segments ( 16 - 18 ) having discs ( 15 ) positively on corresponding pins ( 30 ) of the base plate ( 12 ) of the positive form ( 11 ) and pushed on the pin ( 30 ) are secured against loosening by retaining elements. Positive mold according to claim 1, characterized in that the mold segments ( 16 - 18 ) of the discs ( 15 ) of the shape cam ( 13 ) for the production of cam plates ( 2 ) with retaining cams ( 4 ), the radially outwardly projecting fixing projections ( 8th ), are directed radially outward. Positive mold according to claims 1 and 2, characterized in that the sleeves ( 14 ) the shape cams ( 13 ) with which the shape segments ( 16 - 18 ) having discs ( 15 ) with grub screws ( 31 ) on the pins ( 30 ) of the base plate ( 12 ) are attached. Positive mold according to one of claims 1 to 3, characterized in that the mold segments ( 16 - 18 ) equipped discs ( 15 ) of the shape cam ( 13 ) are produced as plastic injection molded parts.