Do I need to protect the mold during the injection molding process of precision gears?

As far as I know, the market for this product is relatively small, the automated factory purchases are generally German and Japanese machines, a more than 1 million, the protection function may be better than yours, if it is a general machine to buy a more than 100,000, spend 40,000 or 50,000 protectors should not be cost-effective, it is recommended that you seek injection molding machine manufacturers, to see if the machine can be equipped when the machine leaves the factory, ** of course it is too expensive, you should seek how to reduce costs, there will be a larger market.

There are tens of thousands of mold protectors. Is it possible to protect a mold? Or for most mold protection.

If it is just a mold, most domestic factories cannot afford to use it. You're looking for high-end users.

It is not necessary to install this thing in the mold generally. Frequent mold removal is not normal, product residue, and in most cases, there is a problem with the mold.

Generally, there is residual material or something for the parts, and in most cases, there is not much damage to the mold in a short time, and it is very troublesome if it is a fragile part.

In addition, low-voltage protection can be set on the injection molding machine to prevent some residual materials and demoulding problems in injection molding.

It should be more cost-effective, and it is generally used for injection molding manufacturers in automated production, and your kind of equipment is generally installed on the injection molding machine that picks up parts by manipulator, and the precision injection molding beer machine is the most used.

How can you admit that the mold is always short of materials or residues, this is an unqualified mold. Maybe I'm a loner, I don't think there's a market. I can't afford it.

When people are staring at the mold test, there must be no such problems in mass production. So you have a very small market for that product.

During the production process, the Zhijue Mold Monitor can do it for you:

1. Before closing the mold, test whether there is any residue in the mold cavity, mold core and product.

2. The position of the slider, the return of the thimble, and the insert are in place for detection.

3. Check whether the plug-in is inserted correctly.

4. Check whether the thimble is less broken.

5. Whether the product has a lack of material or burr for testing.

6. Check whether the product is completely demoulded.

7. For products with high precision requirements, test whether the product size is qualified.

8. Detect whether the multi-cavity product is missing.

Note that lubrication is the best protection for the mold, and some damaged molds are strained and pulled because of poor lubrication, resulting in the stuckness of the mold.

Chuangzhi Plastic has a special person to maintain the mold, regularly oil and clean.

In the new industrialized road construction plan proposed by the 12th Five-Year Plan of the country, the mold industry will move towards large-scale, precise, complex and long in the future.

Answer: The direction of life and standardization, and for the design of precision injection molds, although the progress is very fast, there are still many problems that need to be improved and should be paid attention to.

In precision injection molding, molds are one of the keys to obtain precision plastic products that meet quality requirements, and the molds used for precision injection molding should meet the requirements of product size, accuracy and shape. This requires that appropriate mold dimensional tolerances should be used first to prevent molding shrinkage errors; At the same time, it is necessary to prevent injection deformation and demoulding deformation, so as to improve the error of mold accuracy and maintain mold accuracy.

The knowledge of the mold itself is very simple: try to use a simple mold structure to achieve the function, can not stick the master mold, and the mold material is used correctly.

The key is to understand the product

1.When the production structure is designed, it can be designed into an interpenetrated structure without affecting the appearance, and it is necessary to achieve the required product function with the simplest mold structure.

2.The degree of understanding of plastic performance determines the reasonable degree of materials used when you design products (including: plasticity, hardness, transparency, high temperature resistance, fire prevention, ultrasonic, etc.), if you do not understand this aspect, the product may be designed with expensive materials, or the product strength is not enough, and some other problems, so when designing the structure to meet the needs of the product, another consideration is the first factor of plastic, because the cost of materials for the product is directly related to the product.

3.The degree of understanding of the surface process determines whether the post-surface treatment of the product you design is easy (especially for audio-visual digital products), such as: multi-color oil injection to make a groove, hot stamping to make a high surface, aluminum alloy fixing method, product to add electroplating hooks, etc

4.The level of knowledge of the machinery determines whether the structure of the product you design is superior, whether the mechanism is feasible, and whether the user is easy to operate when using the product (this is called ergonomics), such as the placement of buttons, the size, the shape of the hand hold, etc.

5.The familiarity with mechanical drawing determines whether your output product engineering drawings are standard and whether there are wrong annotations and identifications, which will directly affect whether the mold manufacturing personnel are easy to understand the engineering drawings you output.

6.The understanding of the production and assembly process determines whether the product you design is easy to assemble, and whether it seems to be easy to assemble on the surface seems to have nothing to do with the design, in fact, this point is particularly important for products with more parts, because it is not easy to assemble is to increase the product assembly man-hours, which also increases the cost of the product.

7.Mastering the knowledge of quality and safety regulations is mainly used to make their own or assist others to make some inspection and testing standards, such as product drop test standards, product inspection and testing standards need structural designers to make or assist others to make, the understanding of safety regulations is more important, especially toy products: such as whether the accessories of small products are easy to be swallowed by children, whether the parts with metal sheets or blades are easy to loosen, etc., will affect whether the safety certificate of the product is easy to pass.

See what kind of injection molded parts are specific, medical, mobile phones?

The accuracy of precision injection gears is mainly guaranteed by the mold, as long as the accuracy and shape of the mold are detected well before production, generally in normal production, there is no need to detect the common normal, the influencing line can not be detected by conventional means, and the normal detection only needs to do the appearance inspection of the parts. However, after the mold is used for a period of time, the accuracy of the mold should be reviewed to avoid batch defective products.

Precision injection gears should also measure the relevant parameters of the gears at any time during normal production to prevent the batch scrapping of products, and it is also a means to check the accuracy of the mold. However, since it is a "plastic" gear, it is advisable to use two detection parameters that are simple and economical to measure, namely the common normal and ring gear runout. As for the tooth shape and tooth direction error, because it requires expensive special equipment to measure, it is recommended:

If necessary, send outside for testing at regular intervals.

Gear molds generally use more nylon materials, but they are easy to deform, remember to pay attention to pressure retention and cooling when injection molding.

Because the mold has the characteristics of specificity, precision, fragility, etc., it is very important to protect the safety of the mold, which is generally summarized as follows.

The following aspects:

1.Anti-rust: Prevent the rust caused by dust cultivation caused by water leakage, condensation, rain, handprints, etc.

2.Anti-collision: Prevent the mold from being damaged due to the fracture of the thimble and the failure to fall back into place.

3.Deburring: Prevent the mold from burrs caused by the touch of the cloth trowel and the nozzle.

4.Missing parts: Prevent the mold from being damaged during the use of the mold due to the lack of tie rod washers and other parts.

5.Anti-pressure: Prevent mold crush caused by mold locking due to residual product.

6.Undervoltage: Prevent damage to the mold caused by excessive low pressure protection pressure. Contact i57576io232

1.A flow regulating valve is made on the runner to make the glue feed of each gate evenly distributed consistent.

2.Make the exhaust grooves along the circumference of the gears, as well as the exhaust grooves at the ends of each runner.

3.Larger gears can do 4, 6, 8....The point gates are all glued. For gears with a diameter of 100 or more, it is possible to make up for the reduction by using a thimble pre-order.

4.The mold temperature of precision gears (above level 4) should be set at about 80 degrees.

5.The cooling channel should be annular and evenly cooled. The front and back molds are consistent. The hole in the middle should also be made as a fountain type waterway.

Our factory already has such a product is very practiced, every time it is always different, the speed is slow, the pressure is high, and the molding time is longer.

The long point of the injection pressure holding time is set, such as 10 seconds, cooling for 15 seconds, and the product is as full as possible. Because the shrinkage of POM is very large, first of all, make sure that your mold is concentric, theoretically as long as the injection molded product copies the concentric mold is good. Gate three points are also OK, because I have made a lot of gear products in HP printers.

There is also a kind of pin in the middle of your mold that is not centered with the outer circle, then the mold needs to replace the pin, which is also a common problem.

The product can be measured with a gear tester for meshing.

It is better to use the DC channel to fill the gate, that is, the place of the round hole in the middle should not be completely touched, so that the rubber material can flow into the mold cavity evenly, which is a little troublesome to repair the gate.

This is the uneven thickness of the glue leading to different shrinkage, we directly 4 points, the angle of 90 degrees. Glue mouth. In many cases, the injection parameters are not adjusted, and the holding time, pressure, and temperature can be increased or lowered.

Disc gates are used. or spoke-sprues.

Try reducing the rate of fire and the pressure of fire.

There are three main points in the maintenance skills of injection molds:

2.Regular maintenance of injection molds: regular maintenance includes the cleaning of exhaust grooves in addition to daily maintenance, the black level of trapped gas burning and exhaust, and the correction of damage and wear parts.

3.Appearance maintenance of injection mold: the outside of the mold base is painted to avoid rust, when the mold is lowered, the fixed mold moving mold should be coated with anti-rust oil, and the mold should be closed tightly when stored to prevent dust from entering the cavity.

1.Focus on tracking and testing several important parts of the injection mold: the role of the ejection and guide parts is to ensure the opening and closing movement of the mold and the ejection of the injection molding product, if any of the product structures are stuck due to damage, it will lead to production stoppage, so it is necessary to keep the lubrication of the mold thimble and guide pillar (use suitable lubricants), 2Regularly check whether the thimble, guide pillar, etc. are deformed and the surface is damaged, and once found, they should be replaced in time; After the completion of a production cycle process, the most reasonable anti-rust oil should be applied to the working surface, movement and guide parts of the injection mold, and special attention should be paid to the protection of the elastic strength of the bearing parts of the gear, rack and pinion mold and spring mold to ensure that it is always in the best working condition;

3.As the production time continues, the cooling channel is easy to deposit scale, rust, etc., which makes the cross-section of the cooling channel smaller and the cooling channel narrower, which greatly reduces the heat exchange rate between the coolant and the injection mold, and increases the production cost of the enterprise, so the cleaning of the runner should be paid attention to; For Sino hot runner injection molds, it is particularly important that the maintenance of the heating and control system helps to prevent production failures.