Importance and maintenance process of injection molding

Time：2020-09-30 09:55:01 / Popularity： / Source：

Today let's talk about mold. Everyone knows that a set of molds is all precious. Injection molding are the most important molding equipment for injection moulding products, and their quality is directly related to quality of products. Molds account for most of cost of manufacturing, and require large quantities of production to share cost of mold. Therefore, for mould in this manufacturing process, of course, we must pay great attention to it, so maintenance of mold is particularly important.

Because of variety of products and frequent replacement of molds, injection moulding products processing enterprises, after completing a production cycle, molds are generally stored in warehouse until next production cycle comes out. However, some processing enterprises pay insufficient attention to preservation of molds, causing rust and surface roughness during storage period, resulting in a decline in product quality and high scrap rate. Some molds are even difficult to reuse, and it is necessary to reinvest a large amount of money to set up a new mold, causing great waste.
Therefore, maintenance of injection molding is very important, Gud Mould collected some operations on mold maintenance, specifically to share with you as follows:
1. Processing enterprise should first equip each pair of molds with a resume card, detailedly account its use, care (lubrication, cleaning, rust prevention) and damage, according to which data of damaged components and degree of wear and tear can be provided for discovering and solving problems, as well as molding process parameters of mold and materials used in product, so as to shorten test time of mold and improve production efficiency.
2. Processing enterprise should test various properties of mold under normal operation of injection molding machine, and measure size of final plastic mold parts. Through this information, existing state of mold can be determined, damage of cavity and core, cooling system, parting surface can be found. According to information provided by plastic mold parts, damage state of mold and maintenance measures can be judged.
3. It is necessary to carry out key tracking and inspection on several important parts of mold: function of ejection and guiding parts is to ensure opening and closing movement of mold and ejection of plastic mold parts. If any part is stuck due to damage, it will lead to production stoppage. Always keep mold thimble and guide column lubrication (use the most suitable lubricant), and regularly check thimble, guide column for deformation and surface damage. Once found, it should be replaced in time;
After completing a production cycle, it is necessary to apply professional anti-rust oil to working surface, movement and guiding parts of mold, especially to protect elastic strength of bearing parts with gears, racks and spring molds to ensure that they are always In optimal working condition;
As production time continues, cooling channel is easy to deposit scale, rust, sludge and algae, which makes cooling passage section smaller, cooling passage narrows, greatly reduces heat exchange rate between coolant and mold, and increases production cost of enterprise. Therefore, cleaning of flow channel should be paid attention; for hot runner mold, maintenance of heating and control system is beneficial to prevent occurrence of production failure, so it is especially important.
Therefore, after each production cycle, belt heater, rod heater, heating probe and thermocouple on mold should be measured with an ohmmeter. If it is damaged, it should be replaced in time and make records so that problems can be discovered at the right time and countermeasures can be taken.

4, We should pay attention to surface maintenance of mold, it directly affects surface quality of product. Focus is to prevent corrosion, therefore, selection of a suitable, high-quality, professional anti-rust oil is particularly important. After mold has completed production task, residual injection molding should be carefully removed according to different injection molding methods. Residual injection molding and other deposits in mold can be removed by using copper rods, copper wires and professional mold cleaning agents, and then air-dried.

5. Disable hard objects such as iron wire and steel bars to avoid scratching surface. If there is rust caused by corrosive injection molding, use a grinder to grind and polish, spray professional anti-rust oil, and then store mold in a dry, cool, dust-free place.
A well-maintained and maintained mold can shorten mold assembly, test time, reduce production failures, stabilize production, ensure injection moulding products quality, reduce waste loss, and reduce operating costs and fixed asset investment. At the beginning, company was able to produce quality products. Therefore, for injection moulding products processing enterprises, in current fierce market competition, maintenance of good molds can help a lot for enterprise.

Gud Mould Industry Co., Ltd

Importance and maintenance process of injection molding

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