* In order to be able to produce ring caps made of soft PVC reliably, we require a Minimum wall thickness of 1.0 mm.
The essential Advantages dipped ring caps are both their quick and Easy to install on round tubes, the rubber-flexible Covytec ® soft PVC types the ideal material for the Use as pipe protection caps, pipe end caps, pipe cover caps
Pipe caps or cap for Protection from the weather.
The shock-absorbing properties of the PVC used and the choice of a signal colour also make ring caps a Product in the field of occupational safety.
The production of ring caps using the dip moulding process is economically very interesting. Compared to expensive injection moulding tools, only simple and therefore cost-effective dipping tools are required for the production of ring caps. HAMCO already has more than 50 standard moulds in accordance with Product table, which can be used to produce variants in usable length, colour and also hardness setting.
The multiple dip mould with its tubular dip cores is heated in an oven and then immediately dipped into a bath of liquid PVC. When the hot mould cores come into contact with the PVC paste, also known as plastisol, a skin forms simultaneously on the outer and inner contours of the moulding cores, which forms the desired wall thickness s of the ring caps by the end of a defined dwell time in the dipping bath.
The wall thickness that can be achieved depends on the temperature of the mould, the dwell time of the mould in the dip tank and the viscosity of the PVC material. The usable height of the pipe protection and pipe end caps for pipes is controlled by the immersion depth of the mould cores.
After removing the dipping tool from the dipping bath, the excess PVC material runs and drips off, whereby flow marks and drop formation cannot be avoided.
The multi-cavity mould with the PVC layer is then heated again to achieve the rubber-elastic properties of the PVC material. This work step is often referred to as gelling.
After cooling, the ring caps are manually removed from the cores using an auxiliary tool.
*Light colours that are exposed to outdoor weathering can be made UV-stable by adding a formulation ingredient. Dark colours such as black and anthracite grey are generally UV-resistant.
As both the base material (PVC plastisol) and a UV stabiliser have a yellowish inherent colour, the accuracy of the RAL colour shade is minimally affected. We confirm the colour shade similar to the RAL number.
The standard soft PVC used by HAMCO from the Covytec® material serieswhich is predominantly processed in 68 Shore A, but also in other hardness grades, has a high degree of hardness regardless of the selected hardness. Standard or special colour has sufficient elasticity for secure installation.
Dipped, ring-shaped protective caps for round pipes are manufactured slightly undersized so that they can be easily stretched to the outer diameter of the pipe during installation. The flexibility of the Covytec® PVC materials ensures that the barely noticeable expansion is immediately cancelled out after installation and that the technically smooth inner contour of the PVC ring cap fits snugly against the outer diameter of the pipe end to be protected.
Both the Static friction as well as from the elongation of the material centrally acting compressive forces already provide a captive hold of the fitted ring caps. However, it is important, that the Slot width sB greater than the wall thickness of the pipe section was selected to prevent the inner and outer contours of the ring caps from spreading.
An important prerequisite that may need to be taken into account from the environment of the food industry is the detectability of the PVC material used in the Blog post Detectable caps is discussed in detail.
Are you looking for protective caps for hollow chamber profiles that deviate from the idealised cross-section of a round tube?
HAMCO offers customised solutions for such requirements. Edge protection caps which can be realised very quickly and cost-effectively. A simple structure of the Dipping tools ensures that we can offer you the best possible service with our excellently equipped In-house toolmaking measurable Cost and time benefits in the realisation of new dimensions.
The Wall thickness is measured non-destructively at the open end of the cap.
Due to the process, it continuously increases towards the closed end of the immersed caps.
Drain marks and drain drops At the closed end, they cannot be completely avoided due to the nature of the process.
In your role as a strategic buyer, as a contact person in the design and development department, as a technician, quality engineer, production or operations manager, you are involved in other areas of the company, detailed information about the process of PVC dipped parts production interested?
On the product pages of the PVC round capsthe Rectangular caps, the product page of the Coating of metallic components and in the knowledge section under Manufacturing processes we provide detailed information including generally applicable design, assembly and quality instructions.
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To reading sample
| Designation | D | sB | s | Suitable for inch | max. height |
|---|---|---|---|---|---|
| Ring cap 15.0 x 1.0 x H | 15,0 | 1,0 | 1,0 | 20 | |
| Ring cap 16.0 x 1.0 x H | 16,0 | 1,0 | 1,0 | 20 | |
| Ring cap 18.0 x 1.2 x H | 18,0 | 1,2 | 1,0 | 20 | |
| Ring cap 18.6 x 1.1 x H | 18,6 | 1,1 | 1,0 | 20 | |
| Ring cap 19.5 x 1.0 x H | 19,5 | 1,0 | 1,0 | 20 | |
| Ring cap 20.0 x 1.2 x H | 20,0 | 1,2 | 1,0 | 20 | |
| Ring cap 20.0 x 1.2 x H | 20,0 | 1,2 | 1,1 | 20 | |
| Ring cap 20.4 x 1.2 x H | 20,4 | 1,2 | 1,1 | 20 | |
| Ring cap 22.0 x 1.2 x H | 22,0 | 1,2 | 1,1 | 20 | |
| Ring cap 22.5 x 1.3 x H | 22,5 | 1,3 | 1,1 | 20 | |
| Ring cap 25.0 x 1.2 x H | 25,0 | 1,2 | 1,1 | 20 | |
| Ring cap 26.8 x 2.5 x H | 26,9 | 1,2 | 1,8 | 3?4? | 40 |
| Ring cap 26.9 x 2.5 x H | 26,9 | 1,2 | 1,2 | 3?4? | 40 |
| Ring cap 26.9 x 2.5 x H | 26,9 | 1,2 | 1,7 | 3?4? | 40 |
| Ring cap 28.0 x 1.5 x H | 28,0 | 1,5 | 1,2 | 20 | |
| Ring cap 28.3 x 1.4 x H | 28,3 | 1,4 | 1,2 | 20 | |
| Ring cap 30.0 x 1.5 x H | 30,0 | 1,5 | 1,2 | 40 | |
| Ring cap 30.0 x 1.7 x H | 30,0 | 1,7 | 1,2 | 40 | |
| Ring cap 31.5 x 1.5 x H | 31,5 | 1,5 | 1,2 | 25 | |
| Ring cap 33.7 x 3.0 x H | 33,7 | 3,0 | 1,2 | 1? | 40 |
| Ring cap 33.7 x 3.0 x H | 33,7 | 3,0 | 1,5 | 1? | 40 |
| Ring cap 33.7 x 3.0 x H | 33,7 | 3,0 | 1,8 | 1? | 40 |
| Ring cap 33.7 x 3.1 x H | 33,7 | 3,1 | 1,2 | 1? | 40 |
| Ring cap 33.7 x 3.1 x H | 33,7 | 3,1 | 1,5 | 1? | 40 |
| Ring cap 33.7 x 3.1 x H | 33,7 | 3,1 | 1,8 | 1? | 40 |
| Ring cap 36.5 x 1.4 x H | 36,5 | 1,4 | 1,2 | 25 | |
| Ring cap 40.0 x 1.5 x H | 40,0 | 1,5 | 1,2 | 25 | |
| Ring cap 42.4 x 3.1 x H | 42,4 | 3,1 | 1,3 | 1 1?4? | 22 |
| Ring cap 42.4 x 3.1 x H | 42,4 | 3,1 | 1,8 | 1 1?4? | 22 |
| Ring cap 42.4 x 3.2 x H | 42,4 | 3,2 | 2,2 | 1 1?4? | 22 |
| Ring cap 45.5 x 2.4 x H | 45,5 | 2,4 | 1,3 | 25 | |
| Ring cap 45.5 x 2.4 x H | 45,5 | 2,4 | 1,5 | 25 | |
| Ring cap 47.0 x 1.5 x H | 47,0 | 1,5 | 1,3 | 25 | |
| Ring cap 48.3 x 3.2 x H | 48,3 | 3,2 | 1,5 | 1 1?2? | 40 |
| Ring cap 48.3 x 3.2 x H | 48,3 | 3,2 | 2,0 | 1 1?2? | 40 |
| Ring cap 48.3 x 3.3 x H | 48,3 | 3,3 | 1,3 | 1 1?2? | 40 |
| Ring cap 48.3 x 3.3 x H | 48,3 | 3,3 | 1,8 | 1 1?2? | 40 |
| Ring cap 50.0 x 1.7 x H | 50,0 | 1,7 | 1,3 | 25 | |
| Ring cap 54.0 x 1.5 x H | 54,0 | 1,5 | 1,3 | 25 | |
| Ring cap 59.3 x 1.75 x H | 59,3 | 1,8 | 1,3 | 25 | |
| Ring cap 60.3 x 2.9 x H | 60,3 | 2,9 | 1,3 | 2? | 40 |
| Ring cap 60.3 x 2.9 x H | 60,3 | 2,9 | 1,6 | 2? | 40 |
| Ring cap 60.3 x 2.9 x H | 60,3 | 2,9 | 1,8 | 2? | 40 |
| Ring cap 60.3 x 2.9 x H | 60,3 | 2,9 | 2,0 | 2? | 40 |
| Ring cap 63.0 x 1.8 x H | 63,0 | 1,8 | 1,3 | 25 | |
| Ring cap 75.0 x 2.0 x H | 75,0 | 2,0 | 1,3 | 40 | |
| Ring cap 75.0 x 2.0 x H | 75,0 | 2,0 | 2,0 | 40 | |
| Ring cap 76.1 x 3.65 x H | 76,1 | 3,7 | 1,3 | 2 1?2? | 40 |
| Ring cap 76.1 x 3.65 x H | 76,1 | 3,7 | 1,6 | 2 1?2? | 40 |
| Ring cap 101.6 x 2.8 x H | 101,6 | 2,8 | 1,3 | 3 1?2? | 35 |
| Ring cap 101.6 x 2.8 x H | 101,6 | 2,8 | 2,0 | 3 1?2? | 35 |
Large and small quantity requirements Direct processing
Large and small quantity requirements
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