LSR Injection mold common problems and solutions?

Published on: 2020-06-03

Share:

In the following paragraphs, we will describe some of the main problems (finished product defects) of LSR injection mold and the possible causes of defective products. The following questions are from the observation and collection of different product evaluations by LSR injection mold. All data (problems and some improved processes)

LSR injection molding defects one: Flash, burr

The silicone material flows out of the LSR injection molding machine mold cavity and produces a film at the edge line of the component. Cause of burr:

The clamping force of the LSR injection mold is too small and the mold closing is not tight

● injection mold speed and pressure are too high (pressure is usually combined with LSR injection speed and is generally specified)

● mold temperature too high

● the temperature retained is too high

● it is too late to close the LSR injection point, and the injection pressure should be the most appropriate within the whole injected volume. The time to maintain the pressure phase is useful to complete the filling of the cavity. (low pressure)

● LSR injection volume is too large

● the mold is stained at the edge line of the part

LSR injection molding products with bubble

Possible causes of bubbles

● LSR injection machine speed and pressure are too high

● mold temperature too high

● the exhaust passage is blocked by dirt (phenomenon: bubble occurs far away from the gate)

LSR injection molding products with burning

The white defect appears at the end of the part due to air compression

● injection pressure and speed are too high

● mold temperature too high

● exhaust passage blocked by pollution

If the above parameters can not be improved, it may be necessary to adjust the clamping mold force (in the closed mold stage), in order to obtain the minimum clamping force in the LSR injection stage. (low pressure in the cavity), let the air run away from the cavity and then increase the clamping force to the most appropriate, then fixed phase. Avoid burrs. (maximum pressure into cavity)

Scorch

The product has started to solidify during the LSR injection phase, possibly due to

● injection molding speed is too slow

● injection mold temperature too high


For more about rubber molding machine,rubber machine.

Welcome contact Ms Helen Xu

Whatsapp:+8617700296990

Email:info@huayijx.com

Latest Release

2024-02-23

CHINAPLAS 2024 The 36th International Exhibition on Plastics and Rubber Industries

2024-02-23

RubberTech China: the trade show The International Exhibition on Rubber Technology, also known as RubberTech China, has multiple characters ranging from enabling enterprises to develop trade opportunities and realize your brand promotion. In addition, it takes the role of an essential access to information exchange and technical communication, as well as a weather vane and propeller for the global rubber industry. With the rapid growth in the international rubber industry,

2024-2-23

Middle East Energy, the region's most anticipated energy event is all set to be back with its 49th edition, running from the 16th to the 18th of April 2024 at Dubai World Trade Centre. The flagship energy event of the year will be the epicenter of opportunities for energy professionals from all over the world! And keeping in line with COP28, Middle East Energy 2024 will be bigger, better, and more focused on sectors that will cater to your energy needs.

2024-01-09

How to make rubber bushes by steps? Not only how to mold rubber bushes, but a full consideration for how to set up a rubber bushes plant from zero.

2021-08-11

Rubber tracks Preforming Line,China top one supplier, new created production in the world to save labor cost and improve rubber tracks quality, only used for rubber tracks manufacturing plant to acchieve automatic and smart proudction.

2021-10-12

How to make rubber insulators? Or how to make insulator with silicone rubber?

Get Your Free Quote

We will contact you within 24 hours,thanks very much for your inquiry!