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Agathon Mini Fine Centering
Standard: 7981 (with bushing)
Guide pillar with ball cage for high-precision and smooth centering processes. For static and dynamic tasks.
Advantages
- Preloaded and therefore backlash-free centering for maximum precision
- Freely positionable with low space requirement
- Smooth and jerk-free movement, minimal wear
- Available in diameters of 8 and 10 mm
- Bushing and pillar unit do not need to be paired and can therefore be replaced separately
- A separate bushing (standard 7989) is also available if required
Particularly suitable for: Multi-cavity molds
Multi-cavity mold with floating mold insert
Multi-cavity mold with floating mold insert
Maximum precision for floating mold inserts
- Floating mold inserts are traditionally centered using sliding cubic centering devices. However, centering devices of this type are not backlash-free
- Accommodating cubic centering devices takes up a lot of space and their adjustment is time-consuming. Furthermore, the production of the locating pockets is expensive and imprecise
- The mold inserts are centered backlash-free every time they are closed. Only one of the two inserts is floating
- This is achieved by mini fine centering including ball cages and holding system from Agathon
- Centering is smooth and backlash-free with maximum precision thanks to preload
- The mini fine centering devices can be positioned anywhere and take up very little space. This enables a compact, space-saving design of the tool
- Centering bushes can be dispensed with if the mold insert is sufficiently hard. Centering then takes place through a hole in the opposite mold insert
- The small space requirement allows more room for cooling and ejector. This allows up to 30 % more cavities on the same surface area
- Drilling the required holes is more precise and less expensive than producing cubic pockets. The cost saving is up to 50 %
- Instead of four flat centering devices, only at least two fine centering devices are required
Previous approach
The Agathon concept
Comparison of concepts
Fixed mold insert
Advantages of the Agathon concept
- Small footprint, thus more space for cooling and ejector and up to 30% more cavities on the same surface area
- Machining of the holes is more precise and cheaper than pocket machining
- High design freedom: can be placed anywhere on the surface
- Four flat centering devices can be replaced by at least two fine centering devices
- Up to 50% cost and 30% space savings thanks to simpler machining and smaller installation space
Variant injection molding
Stem shape with four inserts
Center quick-change mold inserts
- In order to fit mold inserts into the master mold with high precision, pockets and inserts had to be machined in a complex process
- Changing mold inserts was complicated, time-consuming and only possible with special expertise
- Mold inserts and master mold are connected via a plug-in connection
- Mini fine centering devices from Agathon serve as plug-in connectors
- In this way, mold inserts can be easily rolled off and centered without play and thus with high precision
- In addition, the change can be carried out quickly and without jamming, even without special know-how
- If the material of the mold insert is sufficiently hard, centering bushes can be dispensed with. The centering pillar and ball cage are held directly by the opposite mold insert
Previous approach
The Agathon concept
Positioning concepts in comparison
Conventional state of the art vs. Agathon concept
Advantages of the Agathon concept
- Repetitive centering accuracy < 0.26µm
- Gentle and easy assembly and disassembly
- Smooth-running without jerky sliding
- Significantly reduced assembly time
- Plates cannot tilt. The precision of the mounting hole is maintained
- Assembly can be carried out without bushing, thus saving even more space
Supplied with: 1x M4x16 (A-07000180), 2x M4x8 (A-07007530) Material of balls: 100Cr6 - 1.3505, hardened 62 to 64 HRC; Centering column material: 16MnCr5, hardened 61 to 63 HRC.
Technical data
d1
=
Centering pillar l Diameter tolerance ISO h3 l Superfinish ground
d2
=
Bushing inner diameter
d3
=
Outer diameter of the centering bushing
d4
=
Pitch circle for fastening screw M4x10
l1
=
Nominal length of the closed fine centering l including from cage end l collapsed
l2
=
Overall length of the centering bushing
l3
=
Installation depth of the centering bushing
l4
=
Total length of the fine centering
l5
=
Entry into the centering (preload), or guided distance
l6 (mm)
=
Immersion depth of the centering
Entrance C
=
Basic dynamic load rating in N - Initial load capacity
Closed C0
=
Basic static load rating in N - Tool closed
Dynamic installation variant
Static installation variant
Short stroke
Positioning of gripping tools
Slide and jaw centering
Downloads
- Brochure Mini Finecentering: norms 7980_7981_7989
- Flyer Mini Fincentering: norms 7980_7981_7989
- Catalogue Standard Parts for mold construction: norms 7990_7992_7993
- Miniature guide elements: norms 7800_7801_6500_6501_7650_7651
- Installation and maintenance of fine centering units
- Factsheet Thermal Expansion
| Application type 1 | Center, Quick change |
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