DE8535923U1 - Date stamp for injection molding tools - Google Patents

Description

for r *

U.Z. 1679.1

Manfred Jackle

Berta-Suttner-Str. 16

7730 VS-Schwenningen

Date stamp for injection molding tools

The innovation concerns a date stamp for injection molding tools according to the preamble of claim 1.

Such date stamps are generally inserted into a bore of a mold plate in such a way that the face marked with the dates is flush with the inner surface of the mold plate, so that the date is imprinted on the surface of the molded part during the injection molding process.
10

In the case of a known date stamp, the one known at the beginning Art is the inner part of the punch compared to the outer part

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Stamp part in its position by means of a ball fastener
fixed and secured * This ball counting is, however
on the one hand because of the twelve for each monastic position
drilling recess as well as further individual parts in the construction

relatively complicated / what makes the production

the same is made more expensive; on the other hand it is with this one
Ball lock required to change the date display
to remove the date stamp from the mold plate, which is what the
time required to change significantly longer *

The innovation is therefore based on the task of one
To create date stamps for injection molding tools * the
with the simplest structure, inexpensive manufacture and
enables quick and easy actuation.

I This task is carried out with a date stamp of the initially f named type according to the new by the characterizing 1

Part of claim 1 solved. s

The O-ring used here can be of standard commercial quality

made of rubber or similar material, e.g. plastic |

exist and cause, as has been shown by experiments, |

a sufficient definition of the inner stamp xls |

opposite the outer stamp part. He has a sufficient |

appropriate resistance and temperature resistance I

on. The adjustment takes place without any dismantling. f

Advantageous embodiments of the innovation according to the invention

direction are evident from the subclaims. |

I.

The measure specified in claim 2 facilitates essential {

borrowed the insertion of the inner punch member with einge- \

put O-ring in the outer punch part when assembling J

menbau. I.

An example of the innovation is shown on the basis of the figures explained in more detail. It shows:

Fig. 1 is an elevation of an inner stamp part according to the innovation,

Fig. 2 is an elevation of an outer stamp part according to the innovation in section,

3 shows a section through a mold plate with inserted, assembled date stamp according to FIG Innovation.

Fig. 4 is a perspective view of an inner stamp part according to the innovation with a visible Arrow with year, and

Fig. 5 is a perspective view of a complete stamp according to the innovation with visible Month numbers as well as arrow and year number.

As best seen in FIGS. 1 and 4, there is the inner punch portion generally designated 10 at a preferred embodiment of the date stamp for injection molding tools according to the innovation from a cylindrical Shank 12 and an enlarged cylindrical extension 14, whose shoulder-like transition to the shank 12 a stop surface for the precise determination of the depth of penetration in the outer sleeve-shaped, generally designated 16 Forms stamp part. An annular groove 18 is formed in the shaft 12, into which an O-ring 20 is inserted will.

The outer punch part 16 consists of a narrower part 22 with a cylindrical cavity 24 for receiving the

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- 5 shafts 12 Uitd an adjoining enlarged one

j Part 26 2U to include the corresponding section 14

j of the inner stamp part 10 * Between the two

sections 22 and 26 of the outer punch part 16 is shown in FIG 5 of the inner wall has a conical entry part

28 is provided, which allows the insertion of the O-ring 20 'provided shaft 12 allows.

A year and an arrow are engraved on the circular end face 30 of the inner stamp part 10, whose straight section is designed as a slot 32 for inserting a screwdriver. In the ring-shaped End face 34 of the outer stamp part 16 are engraved with month numbers arranged in a circle, and through Rotation of the inner stamp part 10 in relation to the outer stamp part 16 by means of an in the slot 32 inserted screwdriver, the arrow on the inner part of the stamp points to the corresponding month number of the outer punch part aligned. The fit between the outer and inner Steir.pelteil is included chosen so that the friction of the O-ring 20 is sufficient to avoid accidental displacement of the two parts in the To effectively prevent relationship to one another. The interaction of the two end faces 30 and 34 is shown in FIG.

evident.

For the intended use of the date stamp according to the innovation, this is, as shown in Fig. 3, after assembly of the inner and outer punch parts 10, 16 z. B. inserted into a mold plate 36 in such a way that j that the end faces 30, 34 with the inner surface 38 of the

Form plate 36 either close flush or are slightly withdrawn in relation to this, so that on finished casting of the date imprint on a protruding ' the base disk appears. The mold plate 36 is closed

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provided for this purpose with a corresponding receiving bore, which in adaptation art the narrow and the enlarged section 22 _t 26 of the outer punch part 16 also has a narrower and a widened section. If necessary, a spacer tube 40 of an appropriate height can be used to achieve the desired level ratio of the end faces 30, 34 in relation to the inner surface 38 of the mold plate 36. Likewise, if the thickness of the mold plate 36 is greater than the height of the punch parts 10, 16, a spacer 42 with corresponding dimensions must be inserted into the bore of the mold plate 36 to compensate. This spacer 42 also forms a stop which effectively prevents axial displacement of the inner stamp part 10 in relation to the outer stamp part 16, in particular when axial pressure is exerted on the inner stamp part 10 when the date display is adjusted.

The design of the date stamp in accordance with the innovation results in a contrast to conventional date stamps of the type mentioned, much simplified structure, which significantly reduces the manufacturing price can be adorned. The adjustment of the date display can be done in the installed state of the date stamp z. Am the mold plate take place without any further assembly operations would be required, and the set The date display is reliably secured against unintentional adjustment.

Claims (3)

PROTECTION CLAIMS 10 Date stamp for injection molding tools consisting of two concentrically nested stamp parts, an inner cylindrical punch part of the year carries on its end face with an arrow and an outer sleeve-shaped stamp member, the month figures and the two punch parts are provided for Aufrechteriialtung a desired position to each other stlegungseinrichtung with a F ', characterized in that the fixing device consists of an O-ring (20) inserted into an annular groove (Iß) provided in the cylindrical shaft (12) of the inner punch part (10). 2. Apparatus according to claim 1, characterized in that the sleeve-shaped outer punch part (16) on its inner surface has a conically extending entry part (28). 3. Apparatus according to claim 1 or 2, characterized in that the rectilinear portion of the on the End face (30) of the inner stamp part (10) provided as a slot for inserting an arrow Screwdriver is formed. Poslschockkonto: Ka / fSrjJhö'7ß979; 75't ', Ba.fjlikc) nJ6: Datsche Bank AG Vllllf / gon (BLZ 69470039) 146332