Quickly understand the common sense of maintenance

For newcomers to material procurement, cosmetic packaging material mold maintenance and repair are more professional, so you need to understand some basic common sense, understand the cosmetic packaging material mold maintenance time, and focus on controlling the time variable factors in the delivery of the packaging material finished product. The controllability of the product delivery date effectively guarantees the immediate delivery of orders. Therefore, this article briefly describes the basic knowledge of cosmetic packaging mold maintenance for your reference:





1. Why do we need to maintain the cosmetic packaging material mold?



Due to the variety of products in the processing of injection molded products, the cosmetic packaging material molds are replaced frequently. After a production cycle is completed, the cosmetic packaging material molds are generally stored in the warehouse until the next production cycle comes. Insufficient attention to the preservation of cosmetic packaging material molds will cause the cosmetic packaging material molds to rust and decrease surface finish during the storage period, resulting in a decline in product quality and a high rejection rate. Some cosmetic packaging molds are even difficult to reuse and need to be re-used. Investing a lot of money to set up new molds, causing great waste.



The use and maintenance of cosmetic packaging material molds account for 15% to 20% of the factors affecting the life of cosmetic packaging material molds. The service life of injection molded cosmetic packaging material molds can generally reach 800,000 times. Some well-maintained cosmetic packaging material molds abroad can even be extended. 2 to 3 times. However, due to neglect of maintenance by domestic enterprises, the service life of injection-molded cosmetic packaging material molds is relatively short, which is only 1/5 to 1/3 of that of foreign companies. Therefore, it is very important to maintain the injection mold for cosmetic packaging materials.



A pair of well-maintained cosmetic packaging material molds can shorten the assembly and debugging time of cosmetic packaging material molds, reduce production failures, make production run smoothly, ensure product quality, reduce waste losses, and reduce enterprise operating costs and fixed assets Investment, when the next production cycle begins, the company can successfully produce products of qualified quality. Therefore, for the processing of injection molded products, in the current fierce market competition, well-maintained cosmetic packaging molds can help companies.





Second, the basic knowledge of cosmetic packaging mold maintenance



Due to the short service life of cosmetic packaging material molds, steel processing man-hours and energy waste, as well as huge economic losses caused by the impact on product quality, are caused. Therefore, it is very important to maintain the injection molding cosmetic packaging material mold, as follows:



1. Find problems through plastic parts

Under the normal operation of the injection molding machine and the cosmetic packaging material mold, test the various properties of the cosmetic packaging material mold, and measure the size of the final molded plastic part. The current state of the cosmetic packaging material mold can be determined through this information, and the shape can be found. The damage to the cavity, core, cooling system and parting surface can be judged according to the information provided by the plastic part to determine the damage status and repair measures of the cosmetic packaging material mold.



2. Maintenance of cosmetic packaging material mold parts

The technical content of the injection molding cosmetic packaging material mold is very high, and there are many various parts. If the maintenance and maintenance of various parts are not paid attention to during the use process, damage and corrosion are very easy to occur, causing tens of thousands or even millions of dollars in economic losses. . Therefore, special attention should be paid to the care and maintenance of the cosmetic packaging material mold during use to ensure the long-term use quality of the cosmetic packaging material mold. To this end, each pair of cosmetic packaging material molds should be equipped with a resume card to record and count its use, care (lubrication, cleaning, rust prevention) and damage in detail. Based on this, you can find out which parts and components have been damaged and the degree of wear. To provide information on discovering and solving problems, as well as the molding process parameters of the cosmetic packaging material mold, and the materials used in the product, so as to shorten the trial time of the cosmetic packaging material mold and improve production efficiency.



3. Pay attention to the surface maintenance of cosmetic packaging material molds

It directly affects the surface quality of the product, and the focus is on preventing rust. Therefore, it is particularly important to choose a suitable, high-quality, and professional anti-rust oil. After the cosmetic packaging material mold has completed the production task, different methods should be adopted to carefully remove the residual injection molding according to different injection molding. Copper rods, copper wires and professional cosmetic packaging material mold cleaning agents can be used to remove the residual injection molding and other deposits in the cosmetic packaging material mold. Blow dry. It is forbidden to clean up hard objects such as iron wires and steel bars to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, they should be polished and sprayed with professional anti-rust oil, and then store the cosmetic packaging mold in a dry, cool, and dust-free place.



4. Focus on tracking and testing several important parts of cosmetic packaging material molds:

The function of ejector and guide components is to ensure the opening and closing movement of the cosmetic packaging material mold and the ejection of the plastic parts. If any part of them is stuck due to damage, it will cause production to stop. Therefore, the ejector pin and guide post of the cosmetic packaging material mold should be maintained frequently. Lubricate (select the most suitable lubricant), and regularly check whether the thimble, guide post, etc. are deformed and surface damaged. Once found, they must be replaced in time; after completing a production cycle, the working surface, movement, and The guide parts are coated with professional anti-rust oil. In addition, the cleaning of the cooling channel is of great importance to production efficiency and product quality. As the production time continues, the cooling channel is prone to deposit scale, rust, silt and algae, which reduces the cross-section of the cooling channel and narrows the cooling channel, greatly reducing the heat exchange rate between the coolant and the cosmetic packaging material mold, and increasing the workshop The production cost, therefore, the cleaning of the water cooling runner should be paid attention to.



For hot runner cosmetic packaging material molds, the maintenance of the heating and control system helps prevent production failures, so it is particularly important. Therefore, after the end of each production cycle, the heater, heating probe and thermocouple on the cosmetic packaging material mold should be measured with an ohmmeter. If damaged, it should be replaced in time and compared with the cosmetic packaging material mold resume. , Make records so that problems can be discovered in time and countermeasures can be taken.



After the cosmetic packaging material mold completes the production task, attention should be paid to the surface maintenance of the cosmetic packaging material mold, which directly affects the surface quality of the product. The focus is to prevent rust and scale removal. Different methods should be used to carefully remove residual injection molding according to different injection molding. Copper rods can be used. , Copper wire and detergent to remove the residual injection molding and other deposits in the cosmetic packaging material mold, and then air-dry. It is forbidden to clean up hard objects such as iron wires and steel bars to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, use a grinder to grind and polish or use a special, and apply anti-rust oil, and then store the cosmetic packaging mold in a dry, cool, and dust-free place.



Third, the primary and secondary maintenance of cosmetic packaging material molds



1. Primary maintenance of cosmetic packaging material mold

The primary maintenance of the cosmetic packaging material mold refers to the daily maintenance of the cosmetic packaging material mold by the operators during production, and the main content is cleaning, lubrication and inspection.



A. Maintenance during mold installation:

Clean the upper and lower surfaces of the cosmetic packaging material mold before installation to ensure that the installation surface of the cosmetic packaging material mold and the working table of the press are not crushed and the parallelism of the upper and lower installation surfaces of the cosmetic packaging material mold during production; cosmetic packaging materials After the mold is installed, open the cosmetic packaging material mold, and clean all parts of the cosmetic packaging material mold, especially the guide mechanism. For the cosmetic packaging material mold of the surface part, the surface of the cosmetic packaging material mold must be cleaned to ensure the quality of the product; Lubricate and apply lubricating grease to the sliding parts of cosmetic packaging material molds; check all parts of cosmetic packaging material molds, especially safety parts. Such as: safety side pins, safety screws, side guards, punching waste passages, etc.



B. Maintenance during production:

During production, the corresponding parts of the cosmetic packaging material mold are regularly oiled. Such as: the press ring and fillet of the drawing die; the knife edge of the trimming die; the part of the flanging knife block, etc.; the small hole waste channel of the trimming punching die is regularly cleaned up.



C. Maintenance after production:

After the end of production, a comprehensive inspection of the cosmetic packaging material mold is required; the cosmetic packaging material mold shall be thoroughly cleaned to ensure the cleanliness of the cosmetic packaging material mold; the waste materials in the cosmetic packaging material mold shall be cleaned up to ensure that there is nothing in the waste box Waste; truthfully feedback the use status and post-use conditions of cosmetic packaging material molds to the 'Working Voucher for Use of Cosmetic Packaging Material Moulds'.



2. Secondary maintenance of cosmetic packaging material molds

The secondary maintenance of the cosmetic packaging material mold refers to the regular and systematic maintenance of the cosmetic packaging material mold based on the technical status and complexity of the cosmetic packaging material mold. This maintenance work is completed by mold repair personnel, and records are made according to the maintenance situation. The following describes the requirements and methods of the second warranty for different parts:



A. Drawing dies, punches and dies:

The main problem of the convex and concave molds of the drawing die is the napping and the pressing pits of the molding surface. During maintenance, the rounded napping part of the cosmetic packaging material mold is mainly polished. If there is a pressure pit, the cosmetic packaging material mold must be repaired and then repaired;



B. Guide parts (guide posts, guide sleeves and guide plates, etc.):

Strain marks and other phenomena may appear in cosmetic packaging material molds during work. The main reasons are dirty lubricating oil and guide gap deviation. When the guide parts produce pull marks, use oilstone to smooth them and polish them to eliminate them;



C. Trimming edge:

The knife edge part of the cosmetic packaging material mold is prone to chipping and cutting edge collapse during the use process. At this time, the damaged part of the cosmetic packaging material mold should be repaired by welding;



D. Elastic parts such as springs:

During use, the spring is one of the most vulnerable parts of the cosmetic packaging mold, and it usually breaks and deforms. The method adopted is to replace, but during the replacement process, you must pay attention to the specifications and models of the springs. The specifications and models of the springs are determined by the three items of color, outer diameter and length. Only when these three items are the same can they be replaced;



E. Punch and sleeve:

Most of the punches and sleeves used on cosmetic packaging material molds are made of standard parts. During the use of cosmetic packaging material molds, the punches are prone to breakage, bending and gnawing, and the punching sleeves are generally broken. The damage of the punch and sleeve is generally replaced with parts of the same specification. The parameters of the punch mainly include the size of the working part, the size of the installation part, the length dimension, etc.;



F. Fastening parts:

Check whether the fastening parts are loose or damaged. The method adopted is to find parts of the same specification for replacement;



G. Pressing and unloading parts:

Pressing parts such as pressing plates, Uniglue, etc., unloading parts such as unloading plates, pneumatic ejector devices, etc. During maintenance, check whether the assembly relationship of each part is damaged, and repair the damaged part. Check whether the pneumatic jacking material is leaking, and take measures for the specific situation. If the trachea is damaged, replace it.



4. Maintenance instructions for key components of cosmetic packaging material molds

Take the injection mold as an example, talk about the maintenance of the key components of the cosmetic packaging mold



1. Public model



The mold surface (including male BLOCK, guide post, sliding seat, sliding rail, etc.) should be clean and free of rust, and check the appearance for obvious damage



2. Master model



Die surface (including female BLOCK, oblique guide post, oblique pressure block, guide sleeve, etc.) should be clean and free of rust, and check the appearance for obvious damage



3. The placement of the slider on the male mold



The slider should maintain the initial position when the mold is opened on the male mold, and manually check whether the slider slides smoothly on the sliding seat.



4. The placement of the slider on the master model



The slider should not be placed on the edge of the master mold casually, and should be set on the inclined guide post to prevent the slider from falling, falling, or being injured.



5. Male and female BLOCK



The slider should not be placed on the edge of the master mold casually, and should be set on the inclined guide post to prevent the slider from falling, falling, or being injured.



6. Maintenance of the guide post and guide post



The guide post serves as a guide on the cosmetic packaging material mold, and the male and female molds cooperate with positioning. The guide post must be thoroughly cleaned of residual oil (remaining oil in the oil ring) before maintenance, and then use your fingers to evenly apply the butter on the guide Around the column.



7. Oblique guide pin and oblique pressure block



The oblique guide pin and the oblique pressure block must be kept clean and clean. The angle of the oblique guide pin mainly determines the stroke of the slider. The oblique pressure block plays the role of positioning the slider when the mold is closed.



8. Maintenance of the slider



After cleaning the surface of the slider, use your fingers to evenly spread the butter on the bottom and sides of the slider, paying attention not to apply too much butter



9. Maintenance of sliding seat



Wipe the surface of the sliding seat clean with a rag, then use your fingers to evenly spread the butter on the surface of the sliding seat, and pay attention to clean the oil groove of the sliding seat.



10. Slide rail



The slide rail is the in and out rail that the slider and the cosmetic packaging material mold cooperate with. The size and height of the track not only determine the sliding tightness of the slider, but also determine whether the slider and the BLOCK fit in place



11. Limit steel ball



The limit steel ball prevents the slider from sliding out of the slide rail when the cosmetic packaging material mold is opened. The limit steel ball is installed on the sliding seat to limit the position. The limit steel ball is generally a standard part



12. Adjustment of limit steel ball



The adjustment of the limit steel ball is achieved by screwing in or out from the bottom of the sliding seat. The adjustment of the limit steel ball should be moderately tight, not too tight or too loose



13. Limit hole



The limit hole is used in conjunction with the limit steel ball. The position of the limit hole determines the position of the slider on the slide rail after the cosmetic packaging material mold is opened.



14, thimble



The thimble has standard and non-standard parts; the thimble must not be bent or burrs; the head of the thimble must not be damaged to prevent burrs; the method of maintaining the thimble is to wipe the thimble clean with a rag before spraying the thimble oil



15. Spring



The spring is the part of the ejection system of the cosmetic packaging material mold. The different appearance colors of the spring represent different elastic coefficients. The dimensions of the spring include loop diameter, pitch, length, etc., and the two ends of the spring must be ground into a flat surface.



16. Mold clamping for cosmetic packaging materials



When clamping the mold, pay attention to the guide post, guide sleeve, oblique guide post, and the holes of the oblique guide post must be aligned at the same time. The mold clamping should be smooth, and the mold clamping cannot be forced.