Hot runner cannot be combined with insert molding technology-Mold|Connector|Automotive Hot Runner

Hot runner cannot be separated from insert molding technology, co-injection molding technology and multi-component injection molding technology. Due to the limitations of the runner, the ratio of wall thickness and the problem of welded joints, a large number of parts such as automobile bumpers can only be processed by hot runner molds. 

2022-09-19

Environmental Protection and Efficiency of Hot Runners

The application of the hot runner does not generate waste, so there is no problem of waste and waste in the hot runner. Waste means waste of resources, and the hot runner system is a low-carbon product, and it will not produce factors that are harmful to the environment. Due to the wide variety of plastics and often different colors, the material heads accumulated during the injection molding process must be classified, dehumidified, dried and sealed for storage. At the same time, the noise generated by shredding will also have a negative impact on the environment. Therefore, the application of hot runner has the following advantages:

2022-09-19

Influence of plastic temperature and flow on hot runner mold

A successful hot runner mold application project requires multiple links to ensure it. The most important of which are two technical factors: one is the control of the temperature of the plastic, and the other is the control of the flow of the plastic. 1. Control of plastic temperature Control of plastic temperature is extremely important in hot runner mold applications. Many processing and product quality problems in the production process directly stem from the poor temperature control of the hot runner system. For example, the problem of poor product gate quality when using the hot pin gate method for injection molding, the difficulty in closing the valve pin when the valve gate method is used, and the inconsistency of the filling time and quality of parts in multi-cavity molds. If possible, a hot runner system with multi-zone temperature control should be selected as far as possible to increase the flexibility and adaptability of use. 2. Control of plastic flow.

2022-09-19

What are the ways of feeding the mold hot runner?

Hot runner glue feeding method 1: "point gate", the point gate method is the most common glue feeding method. It is determined by several factors such as gate size, gate cooling and nozzle tip temperature. It is suitable for almost all known plastics, and its glue inlet will leave a small gate mark on the surface of the product, the size of which is determined by the size of the gate and different plastics. Hot runner feeding method 2: "large nozzle", the nozzle of the large nozzle is an open hot nozzle, and there will be a small shank on the surface of the injection molded product, which can provide a large gate size and achieve excellent pressure holding effect. In order to reduce the product stress, it can be used in the way of not demanding gate marks or shunting runner feeding.

2022-09-19

What is the working principle of the hot runner-temperature control box?

What is the working principle of the hot runner temperature control box? The hot runner temperature control box is a continuous hot runner system that needs to maintain the temperature value of the equipment. The utility model is composed of a temperature control card, an air switch, a box body, a fan, a connection terminal and a cable. Rotary thermostat? The hot runner temperature control box is a device that can continuously maintain the required temperature. Use an intelligent computer chip (mcu) to detect the temperature of the hot runner, and then output the appropriate proportional current through the internal data processing of the intelligent computer. The stability of temperature control accuracy mainly depends on the following important factors:

2022-09-19

What are the hot runner molds?

Hot runner molds can be divided into open hot runner molds and needle valve hot runner molds. Because the open hot runner is injected into the mold by breaking through the condensation gate when the injection machine screw advances, on the contrary, when the screw retreats in the injection machine, the glue outlet can be closed with the gate condensing. Therefore, it is usually very important to choose the size of the gate. Otherwise, due to the temperature in the gate area, either condensation will block the hot nozzle and no glue will be injected, or there will be wire drawing at the gate of the hot nozzle and drooling. In addition, if the gate cannot be condensed at the same time when the screw retreats, a reverse suction force will be formed on the mold cavity, which is not conducive to maintaining the cavity pressure. Commonly used gate hot runners, straight gate hot runners, and submerged gate hot runners with split runners. Due to the simple structure of the open hot runner, the mold processing is simple and the maintenance cost is low, and the requirements for the appearance of the injection product are not too high or the purchase cost is considered, there is no nozzle or few nozzles after use, so use this kind of There are still many users of hot runners. Commonly used gate hot runners, straight gate hot runners, and submerged gate hot runners with split runners.

2022-09-19

How many links does a successful hot runner mold application project need to be guaranteed?

Plastic temperature control Control of plastic temperature is extremely important in hot runner mold applications. Many processing and product quality problems in the production process are directly caused by the poor temperature control of the hot runner system. For the problem of difficulty in closing and the problem of inconsistent filling time and quality of parts in multi-cavity molds, if possible, a hot runner system with multi-zone segmented temperature control should be selected to increase the flexibility and adaptability of use.

2022-09-19

What problems of injection pressure must be considered in the hot runner system?

Customers may not be very careful about the application of the hot runner system. Today, Dent Hot Runner tells you that the injection pressure should be considered when selecting the hot runner system. The injection pressure loss in the hot runner system cannot be ignored. Many hot runner mold customers have a misunderstanding: the plastic melt in the hot runner is always hot, so the injection pressure loss of the hot runner is much smaller than that of the cold runner.

2022-09-19