5 Must-ask Questions Before You Buy Molds

Get the answers to these questions and find out

what you need to know before selecting a mold for your project



      1.Does the mold supplier offer a reasonable price?

When you make your enquiries, you may find that there is a big difference in price between different suppliers.

Can you get a good quality mold from a cheap mold maker?

  • Can you get a good quality mold from a cheap mold maker?
  • Does the most expensive mold mean the best quality?

Because there are so many types of molds, there will be differences in pricing. You will need to consider the cost and quality of every part of the plastic mold, as follows.

  1. The mold base. This is the whole frame of the mold structure. You will need to consider that the base affects all stages of production. The mold base generally accounts for 10% -30% of the mold standard.
  1. The core and cavity. You can choose the steel depending on the type of raw material to be injected and the time you need. The general types of steel for plastic mold are 718,718H,S136,8407,NAK80,P20 and 2083.
  1. The hot runner.
  1. The copper.
  1. The slider.
  1. The machine processing: the cost for a lathe machine, a milling machine, a surface grinder machine, the cost for CNC, the cost for EDM and any other machine processing costs.

       7.The mold design.

  1. Factory management.


        2.Do you know which mold material you need?

Consider the following three points when choosing your mold material:

(1)     The plastic material you need

Avoid PVC plastic, because it produces corrosive acid gas during production.  Ordinary steel rusts easily and damages the mold, so it’s better to choose corrosion-resistant steel, such as 2083, H136H.

(2)     Your product requirements

Very fine transparent products such as optical lenses and glasses require a very good polished steel.  For S136, if someone chooses the wrong steel, when you test the mold you will find obvious material lines.  These can not be eliminated by polishing, and so the product would not meet your requirements.

(3)      The shot time

When you buy the mold, you should consider what the mold will be used for, the shot time and the cost of the mold.  If the requirements are not strict, you can choose a cheaper material mold.

      3.Does the company have an experienced designer?

Using an injection molder with the in-house capability to steer your project through from concept to completion has several advantages.  In the early stages of development, refinements in design are often made.  When you work with a one-stop shop molder, these changes can be made, reviewed, and refined within a short time frame.  Design engineers are trained to build the best possible design for the project and they work directly with the toolmakers to produce the highest quality parts.

 Bravan Mold’s designers always liaise with our customers to establish every detail of their requirements before designing the mold.  When the customer receives the drawing, we revise the design at that point if required, according to their needs.  We have over 10 years’ experience.  Therefore we completely understand the process of designing molds to meet our customers’ needs.  We consider every aspect of your requirements while ensuring maximum quality.


        4.Do you know to choose a good quality mold?

The mold’s quality and your intended use for it are important factors, however you should also consider the manufacturer’s professional standards.

Bravan Mold has a strict quality assurance process.  When the mold is finished,we use precision instruments to test the pass rate of a sample and make sure that it meets quality standards and our customer’s requirements.  Then we send the sample to our customer.  Before shipping the finished product, we do a final test on the mold.  We use high quality packaging to make sure the mold is well protected.

You can place an order for shipment using our order form.

      5.Do you know how a mold is structured?

The mold consists of the following parts:

The runner system, forming system, temperature control system, exhaust system, eject system and reset system.