What do DNA sample tubes & sewage systems have in common?

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You might guess, but we better give you the answer straight away: they both need plastic injection moulds to create the plastic parts which are used in both applications. And even though the dimensions are completely different, AMS has been making plastic injection moulds for both.

The plastic mould team of AMS has been very busy in 2016 and as a result we forgot to regularly share some highlights with you. With this article we want to show you two completely different projects, which both have a totally different ‘tube’ as the basis of the product. The first one is a small 2K tube to store tissue samples in, and the other example is a huge tube being implemented in sewage systems in large infrastructural projects.

Small tube – 2k – small high precision mould

The first example is a small precision mould that was engineered, built and tested by a subcontractor of AMS. A complex mould with interchangeable parts. The mould needed to produce 2K tubes. Next to the tube mould another mould was built for the accompanying 2K cap.



The complexity of this project arises from the concurrent engineering process that took place. Since the client wanted to apply all kinds of marking technologies on the sample storage tubes for track and trace purposes, materials were still under consideration when we started with the mould building process. The extreme freezing tests that the client performed on the products caused some challenges as well.

After various production runs with different material combinations, conducted by AMS’ subcontractor, the final material choices for the tubes and caps were made by the client. Based on the characteristics of the materials chosen the moulds were finished. Tolerances on the parts were extremely critical, since the aim of the tubes is to store samples 100% air and water tight. Eventually, after a final test run, the moulds were shipped to the client’s R&D Department in The Netherlands.

Big tube – very big high precision mould

The other mould we want to show you has arrived a few weeks ago in The Netherlands. The mould measures 2,36 x 1,90 x 1,18mtrs and weights 9.681kgs. It is equipped with an Incoe hot runner, features 3 hydraulic sliders. This mould produces sewage system parts with a shot weight of 3,7kgs. Part material used is low melt index Polypropylene.


The lead time from approval mould drawing to first mould test was 8 weeks. Tolerances in the part’s upper tube diameter of 40cms are maximum 0,5 mm. The tube feature at the lower side of the part has a tolerance of only 0,4mm.

First out of tool samples were of such a high quality, that client immediately instructed to ship this mould, together with the other mould from the same project, via The Netherlands, to its plastic injection production facility in Poland. A special container was made to ship these 2 moulds by seafreight from S-China.



Prior of being shipped to Europe, AMS conducted a 3 hours mould trial run in China, to make sure that all mould features were operating properly, as well as to make sure that the parts being produced were according to drawing. All machine settings to achieve this were shared with the customer, in order to allow customer to start production immediately upon arrival of the moulds in Poland.


It was not the first mould package AMS made for Pipelife International (www.pipelife.com). Due to the competitive cost/quality ratio, the short delivery lead times and scalable AMS infrastructure & total quality management systems in S-China, an increasing number of operating companies from this global customer order their plastic injection moulds at AMS.

Plastic injection mould making is an important pillar within AMS

Plastic injection mould engineering & procurement has always been one of the pillars in AMS proposition. Not based on ‘cheap China’ routing, but focussing on quality, complexity, diversity and reliable lead times at reasonable pricing levels. With over 1.800 moulds being delivered by AMS globally, made in S-China, a continuously growing customer base and a very strong AMS injection mould project & engineering team, we are almost sure that we can add value to your plastic injection business as well.

Get in touch, and learn how AMS can make your injection moulds

Therefore, feel free to get in touch and discuss your projects with Mr Bas Pot, senior project engineer plastics, at bpot@ams-site.com or call him at +31 20 4940354.

Prior to joining AMS, Bas Pot has been a buyer of injection moulds at AMS for over 10 yrs. Bas was  managing director of a modern plastic injection moulding company in The Netherlands. Bas is already active in the plastics industry for over 25 yrs. So no worries, he talks your language!