Pointless using a UK firm for making small parts?

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richard256

Hi. I'm a newbie to business. I have a product idea where one component will require the design and manufacture of a small plastic part and a small metal part. By default I always want to spend my money with UK contract manufacturers. But, am I going to discover that it is pointless approaching a UK firm, in the sense that costs are going to be, well, daft i.e. prohibitive, or hopelessly uncompetitive? Anyone have experience that you can relate? Thanks. Rich
 

Gecko001

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Apr 21, 2011
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Hi. I'm a newbie to business. I have a product idea where one component will require the design and manufacture of a small plastic part and a small metal part. By default I always want to spend my money with UK contract manufacturers. But, am I going to discover that it is pointless approaching a UK firm, in the sense that costs are going to be, well, daft i.e. prohibitive, or hopelessly uncompetitive? Anyone have experience that you can relate? Thanks. Rich

Have you thought about buying the equipment to make them yourself? Small lathes or injection moulding equipment, new and second hand, can be found on ebay.
 
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D

Deleted member 226268

Hi. I'm a newbie to business. I have a product idea where one component will require the design and manufacture of a small plastic part and a small metal part. By default I always want to spend my money with UK contract manufacturers. But, am I going to discover that it is pointless approaching a UK firm, in the sense that costs are going to be, well, daft i.e. prohibitive, or hopelessly uncompetitive? Anyone have experience that you can relate? Thanks. Rich

.

It is completely irrelevant whether it is a UK firm, or a Chinese firm that you approach.

The cost of manufacturing your widget is usually proportional to the quantity that you ask them to make,
and the choice of materials.

But, no company, anywhere, is really going to bother with order quantities for small parts of less than 100.

It is just not worth their time and effort, setting up machinery up for manufacture of your part,
unless there is a chance of larger quantity, repeat orders of the same part in the future.

You may find a small engineering company to make a few prototype pieces for you, but that's when costs are quite often ..Daft, prohibitive, or hopelessly uncompetitive.

New product design and development, this is what I do.
( Quite often tweaking existing designs to get the future manufacturing costs down )

Chinese companies will be cheaper, but only when you have an established production run in place.
But then you have the importing costs, time delays and maybe language misunderstandings.

There is a whole list of other not so obvious aspects to consider, all of which affect the final cost.

The methods of manufacture.
A metal part can be machined from solid block, or the same functioning part can be made by using flat sheet steel, laser cut to shape and then bent into the final form.

Plastic parts cut from sheet, heat formed into shape, up to injection moulding ( expensive tooling )

The materials.
Metal part can be from stainless steel down to aluminium.
Plastic parts can be anywhere from cheap to expensive ... ABS to Nylon.
All dependent on the required working properties of the widget when it is in use.

The order quantities of parts that you can offer to the manufacturer for each batch.

Finishing.
Polished, chrome plated, colour anodised..

All of these attributes need to be decided before you start production.
Later changes will be expensive.


In reality, designing and producing a new product is a big commitment.
You have to throw yourself and your deep pockets into producing hundreds of widgets, designed and tested so they do the job without failing.

All production will have to be paid for before the first widget is sold.
While you are hoping that they will sell.

.
 
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richard256

Hi. What I actually need is a component that is called a square tube connector. They already exist, but (as far as I know), there is not a series that fits 1/2" box section tube, made of plastic and electrically connects all the tubes. I ask myself, to what degree I need to have a component designed and tooling commissioned, in contrast to an already made part being modified. As if there is mileage (in terms of reduced costs) in a manufacturer producing a bespoke and modified component of a product on sale already. I'm not sure whether there is mileage to think in these terms for the component I mention. I'd be wanting hundreds made at least.
 
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Deleted member 226268

Is 3D printing a potential solution?
.

3D printing is an excellent and cheap method for making prototypes,
making sure all dimentions are correct and holes are in the right place,
everything fits, etc.
But it is not strong enough for production items.

Plastic is usually laid down in pipe-like layers, like the walls of a log cabin,
built up layer after layer until the correct heights are reached.
There is no real strength between those layers, low shear strength, will split apart easily.

It is also a very slow process, hours just to make one piece.

Only injection moulding will produce a solid plastic part, in just a few seconds for each part.

But that means expensive metal dies have to be made, and thousands of plastic components
have to be made to justify the cost of the moulding dies.

.
 
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D

Deleted member 226268

Hi. What I actually need is a component that is called a square tube connector. They already exist, but (as far as I know), there is not a series that fits 1/2" box section tube, made of plastic and electrically connects all the tubes. I ask myself, to what degree I need to have a component designed and tooling commissioned, in contrast to an already made part being modified. As if there is mileage (in terms of reduced costs) in a manufacturer producing a bespoke and modified component of a product on sale already. I'm not sure whether there is mileage to think in these terms for the component I mention. I'd be wanting hundreds made at least.


.

You mean something similar to these ?

https://www.cotel.co.uk/c/23/tube-connectors
 
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Hi. I'm obviously thinking that if I could only identify the actual manufacturer of square tube connectors, that it might be financially beneficial, for them to modify one of their products or to make a component to my specification. But that could be wishful nonsense I guess. :) I mean in terms of saving money.
 
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Yes, that Cotel link shows pretty much the components. The issue for me is how would you proceed in terms of who would you approach. A general plastic parts manufacturer, or someone who is already at least, manufacturing the type of product - but not the exact requirement.

Self manufacture the component! Now that's a thing. :) A bit intimidating.
 
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D

Deleted member 226268

Hi. I'm obviously thinking that if I could only identify the actual manufacturer of square tube connectors, that it might be financially beneficial, for them to modify one of their products or to make a component to my specification. But that could be wishful nonsense I guess. :)


No manufacturer is going to be interested in modifying their own products for small fry like you :D
( no insult intended ):) for just a few hundred parts.

The easiest option is .... You will have to buy their stock components and modify them yourself.

.
 
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Mr D

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Feb 12, 2017
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There may be machine shops who can alter an existing part to suit. Could that work?

Depending on the machinery required, skill required etc. May have to source the part yourself for them to modify but they are perhaps more likely to be set up to deal with small number of orders than manufacturer is.

Any current or ex machine shop people here able to tell me if I'm talking out of my ass with this idea or where the OP can try.
 
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pentel

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  • Mar 12, 2011
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    I wonder how easy it would be for me to injection mold my own tube connector parts

    There are lots of things to consider and a VERY steep learning curve.

    For a basic moulding set up you will need a moulding machine, some sort of water cooling system, possibly a material dryer, possibly a mould temperature controller.

    There is then the part and tool design to consider both of which are not as simple as it first appears. Tool costs can multiply by factors of 4 or more for the same part depending on the designer.

    Do you have any designs? I would be more than happy to give you some feedback and costs.
     
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    Deleted member 315997

    I currently have a low cost moulding machine (in the UK) that would be more than capable of producing these items, tooling could be relatively cheap with removable inserts to create the through hole, let me know if you would like a quote, would just need a drawing and a sample of a similar component to clarify what material is to be used. Send me a PM if you want to your idea to be brought to life.
     
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    JEREMY HAWKE

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    It is a myth that Britain is unable to make things Every town in this country has a good metal work shop or engineers that work with plastics . The problem is nobody wants to pay their very reasonable prices
     
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