Rubber seals
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Catalog excerpts

Rubber seals - 1

Techné Shanghai Techné Turquie BUREAU VERITAS BUREAU VERITAS Edition juillet 2018, Crédits photos : Techné. Imprimerie : Pretext Communication

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Techné Catalogues Le groupe Techné Techné group Die Techné Gruppe Etanchéité & Glissement Sealing & Sliding division Dichtungen & Buchsen Surface treatment Oberflächenbehandlung Vannes Valves Ventiltechnik 40 allée des Haies 69480 Morancé Chromex | Paris Production de joints découpés Cut gasket factory Produktion von Stantzteilen H+ valves | Lyon Fabrication de soupapes de sécurité Safety valves factory Produktion von Sicherheitsventilen Techné | Shanghai Succursale commerciale Sales office Verkaufsbüro Rampini | Milano Fabrication de soupapes de sécurité Safety valves factory Produktion...

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very day for the past 30 years, Techné has developed its knowledge in sealing and sliding parts. Technical and human investments coupled with external growth allow us today, to be a reliable partner for many renowned companies, without compromising the historical values of a family group. We invest in Asia as well as in Europe to be able to continually modernise our production units, in order to keep up with the evolution of our customers. We implement the most advanced technologies like surface treatments to increase the eco-efficiency of your systems. We set up a development policy which...

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Table of content PART I Know-how 6 Processes 18 Development 26 Materials 50 Coatings Standard products 62 O-Rings 78 JT4 X-Rings 84 Backup Rings (BAE) 94 Rubber Cord 96 JR Fitting Seals 100 Bonded Seals 108 Triclover Clamp Seals 114 D-Ring - milk coupling Seals 118 SMS Seals 122 Macon Seals 126 Aseptic O-Rings DIN 11864

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The information in this catalogue is based on the experience gained by Techné in the last decade of research on the development and manufacture of seals and other rubber components. It represents the current state of our knowledge and know-how. The sealing properties of the seals in this catalogue do no rely only on the component itself, but on the other parameters such as the applied pressure, contact area, operating temperature, mechanical stress, media to be sealed and any kind of outside dirt. Because of those high numbers of parameters, it is not possible to give general statements on...

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10 Deflashing process 11 Cutting process 12 Machining process 13 Comparison of methods Quality monitoring 14 Dimensional inspection 15 Inspection 16 Packaging

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Rubber Sealing | Processes a) Moulding process 99 Injection he material is received in the form of raw rubber, called “masterbatch”. If necessary, curing agents, accelerators and activators are mixed in the raw rubber with the help of two rollers. After several runs through the rollers, the material acquires its homogeneity, is calibrated in thickness and cut into strips. It consists of an elastomer base mixed with plasticizers and carbon black (or mineral fillers, usually for coloured mixtures). Semi-finished material acquires its properties of process-ability and hardness. Curing agents,...

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Rubber Sealing | Processes Rubber cutting lozenge The procedure of reception and mixing of the masterbatch is the same as by injection moulding. The masterbatch is cut into strips. The weight of those strips is 100% controlled to ensure that the operators have the exact needed quantity. Rubber cutting lozenge 0.1 With the help of a specific tool, the operator places the strips into the open mould. When the mould shuts the vulcanisation begins. Vulcanisation (or reticulation) is the trigger of the chemical reactions during which the monomer bases bind and form a cross-linked chain. The...

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Rubber Sealing | Processes 9 Transfer moulding Transfer moulding uses a press similar to the one used for compression moulding. It is generally chosen to manufacture parts with bounded or over-moulded metal inserts (See TBS bonded seals page 100). Preparation To obtain such parts, a 3-plates tool is manufactured: a lower plate, a middle plate and a perforated upper plate. The cavities are machined in the middle and lower plates. Vulcanisation The metal inserts are placed on the lower plate. The middle plate is placed on the latter. The rubber strips are placed on the middle plate just above...

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Rubber Sealing | Processes b] Moulding tolerances Techne's moulded parts are made according to ISO 3302. Depending on the selected process, feasibility and customer requirements, a M1 grade (precision part) or a M2 grade will be applied. Even tighter tolerances can be proposed on specific request. Tolerances according to ISO 3302 standard C : Tolerances impacted by the closure of the mold F : Fixed tolerances.

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Rubber Sealing | Processes c) Deflashing process 99 Cryogenic deflashing To perform a manual deflashing, a properly adapted tool must be used. During the manufacture of the mould, the “rubber cutting lozenges” are placed around the cavities (see box on page 7). During the deflashing process, the operator pulls on the “rubber cutting lozenges”. The forces are transmitted, due to the lozenge profile, on a fragility line, so that part can be torn off from the sheet. he parts in the form of either clusters or sheets, are placed in a rotating sieve, and are sprayed with polymer balls or pellets....

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Rubber Sealing | Processes d) Cutting process 99 Press cutting o manufacture gaskets (flat seals), Techné and its division, Chromex, use an automatic process to cut rubber sheets. The gaskets (flat seals) are widely used for static sealing. Two different processes exist : with a cutting blade or with a punch press. The material comes either in rolls or in sheets and is placed on the cutting table. The press is equipped with a cutting tool made specifically according to the wished 2D profile. The piston moves down and the tool separates the parts from the rubber sheet. This process is...

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