The cross-sectional dimensions of the cavity inlet are to be trimmed to achieve the balance of the runner system: the balance of the runner system passes through the cavity inlet BGV value (DalancedGate Value To design and determine the cross-section size of the corresponding cavity inlet, when the runner system is strictly balanced, the BGV value should meet the following requirements: When multi-cavity of the same specification product, the BVG疽 calculated by each cavity inlet must be equal. It can be determined only by cutting it off. The flow plate type automatic injection mold has a simple and compact structure, and does not spray or suck the material during the pressing process, and is convenient to use. The injection tip on the cavity wall, the excess slurry is returned to the storage chamber 7, and the slurry in the cavity is gradually formed into a part blank, and the pressure is maintained after the set maximum pressure is reached, and the pressure holding delay ends.
This design can be stopped to achieve uniformity of each cavity. The layout of the runner system is divided into two categories: balanced and unbalanced.2 flow channel system The design of the runner system for designing the runner-type automatic injection mold includes the processing plastic products https://www.nbtianke.com/product/ layout of the runner system and the determination of relevant parameters.2 There is a complicated structure of the burr-type cavity automatic injection mold, which is inconvenient to install and use; the sealing condition of the core 6 and the cavity 4 The gap between the core 6 and the cavity 4 determines not only the high precision of the mold manufacturing, but also the sealing effect is generally long, and the compression cycle is long; all the cores are immersed in the storage chamber 7 to ensure the material during the pressing process.1 Mold structure characteristics and molding process Figure 1 is the material cavity automatic injection mold structure, the mold is more complicated, all the lower mold is immersed in a large storage chamber 7, the core 6 and the cavity 4 sealing condition towel core The size of the gap between the chamber 6 and the chamber 4 determines that the entire slurry is sealed by a seal between the reservoir chamber 7 and the center column 15.
Therefore, this paper only focuses on the design and correction of the flow channel system in the 1 mode multi-cavity flow path plate type automatic injection mold. The volume of the slurry is constant, otherwise there will be a spray or suction phenomenon, that is, the sum of the cross-sectional areas of all the cores must be equal to the cross-sectional area of the middle column, and the size of the middle column is limited to some extent, possibly to the mold. For the purpose of filling at the same time, it is necessary to design the cavity inlets to different sizes. In one case, the cavity inlet section A1 is assumed, the diameter is known, and the reference value is ∮10mm. As an indispensable tool for Dingye Chemical Production, mold plays an important role in the formation of wet-pressure oriented permanent magnet ferrite magnets. Storage chamber 8,12,16 sealing ring 9 core pad 10 intermediate connecting plate 11. It can be obtained from Table 1: In the case of stable press and injection system, the large deviation value of the same mold forming gross weight is 2%, and the maximum deviation of the same cavity forming blank weight is 1. The rest of the structure is designed with reference to the cavity type automatic injection mold. 2 Feed chamber type automatic injection mold The material chamber automatic injection mold is a commonly used wet-pressure oriented hydromagnet oxygen magnet forming mold. Pressure 匪 14 fixed ring 15 punching column 17 pressure ring 18 injection screw plug 19 mold frame 2. 1 upper mold bottom plate 2 water nozzle 3 water absorption plate 4, 10 seal 圏 5 cavity 6 flow channel plate 7 injection screw plug 8 plug 9 core 11 core plate 12 intermediate connection plate 13 mold frame 3. (2) The process is short and easy to form. The flow channel system of Figure 3 is arranged in an unbalanced arrangement. The flow of the plate type automatic injection mold is short, only 1/3 of the automatic cavity injection mold, which is easy to form, especially for a multi-cavity. The runner system consists of a main flow channel, a split runner, a runner, and a cavity feed port. The dimension LG identified in Figure 2 is the cavity system inlet K degree LG of the runner system, which is determined by the mold cavity height dimension. So far, the whole The design of the runner system is over.3 Correction of the flow channel system Although the flow plate type automatic injection mold has strict design calculation of the parameters of the flow channel system, it may not achieve the desired effect due to processing and other reasons.
The cavity has a maximum deviation of 5. The arrangement (see Figure 3) is the key. When the mold clamping pressure reaches the pressure set by the press, the injection pump starts to feed, and the press machine The magnetization orientation is started, and the slurry injection screw plug 18 flows through the center pillar 15 to reach the storage chamber 7, and then is distributed to each cavity through the injection tank on the wall of the cavity 4 (in a 1-mode multi-cavity, pull-down type) The demolding method is an example).5%, even if different modes are different. At the same time, the vacuum system of the press starts to pump water. 1). The BCV value of the multi-cavity molding of the same specification can be expressed by the following formula: where A is the cross-sectional area of the injection port of the cavity, mm2 L - the total length of the flow channel from the injection screw plug on the main channel to the cavity inlet port, Mm - cavity inlet length, mm Figure 3 is the corresponding cavity inlet section. After the demagnetization, after the demagnetization delay is over, the lower cylinder of the press is pulled down to expose the blank of the part, the slider on the press is quickly retracted, the blank is removed, and a press forming cycle is completed. It is not difficult to obtain the corresponding section diameter by the previously determined channel system parameters and the BCV must be equal. Balanced type means that the cross-sectional size and length of the shunting channel, the runner and the cavity inlet of the main channel are correspondingly equal. 1. Taking the weight of the blank of the 1st 6-cavity flow path plate type automatic injection mold designed and used by our factory as an example, the statistical analysis of the weight of the formed blank is shown in Table 1. The biggest difference between the flow plate type automatic injection mold and the cavity automatic injection mold is that the flow channel system is different. It is necessary to determine the parameters such as the cross-section ruler 10 and the length of the main channel, the runner, and the runner from the cavity feed door.Design of automatic magnet injection mould for permanent magnet ferrite flow passage
This design can be stopped to achieve uniformity of each cavity. The layout of the runner system is divided into two categories: balanced and unbalanced.2 flow channel system The design of the runner system for designing the runner-type automatic injection mold includes the processing plastic products https://www.nbtianke.com/product/ layout of the runner system and the determination of relevant parameters.2 There is a complicated structure of the burr-type cavity automatic injection mold, which is inconvenient to install and use; the sealing condition of the core 6 and the cavity 4 The gap between the core 6 and the cavity 4 determines not only the high precision of the mold manufacturing, but also the sealing effect is generally long, and the compression cycle is long; all the cores are immersed in the storage chamber 7 to ensure the material during the pressing process.1 Mold structure characteristics and molding process Figure 1 is the material cavity automatic injection mold structure, the mold is more complicated, all the lower mold is immersed in a large storage chamber 7, the core 6 and the cavity 4 sealing condition towel core The size of the gap between the chamber 6 and the chamber 4 determines that the entire slurry is sealed by a seal between the reservoir chamber 7 and the center column 15.
Therefore, this paper only focuses on the design and correction of the flow channel system in the 1 mode multi-cavity flow path plate type automatic injection mold. The volume of the slurry is constant, otherwise there will be a spray or suction phenomenon, that is, the sum of the cross-sectional areas of all the cores must be equal to the cross-sectional area of the middle column, and the size of the middle column is limited to some extent, possibly to the mold. For the purpose of filling at the same time, it is necessary to design the cavity inlets to different sizes. In one case, the cavity inlet section A1 is assumed, the diameter is known, and the reference value is ∮10mm. As an indispensable tool for Dingye Chemical Production, mold plays an important role in the formation of wet-pressure oriented permanent magnet ferrite magnets. Storage chamber 8,12,16 sealing ring 9 core pad 10 intermediate connecting plate 11. It can be obtained from Table 1: In the case of stable press and injection system, the large deviation value of the same mold forming gross weight is 2%, and the maximum deviation of the same cavity forming blank weight is 1. The rest of the structure is designed with reference to the cavity type automatic injection mold. 2 Feed chamber type automatic injection mold The material chamber automatic injection mold is a commonly used wet-pressure oriented hydromagnet oxygen magnet forming mold. Pressure 匪 14 fixed ring 15 punching column 17 pressure ring 18 injection screw plug 19 mold frame 2. 1 upper mold bottom plate 2 water nozzle 3 water absorption plate 4, 10 seal 圏 5 cavity 6 flow channel plate 7 injection screw plug 8 plug 9 core 11 core plate 12 intermediate connection plate 13 mold frame 3. (2) The process is short and easy to form. The flow channel system of Figure 3 is arranged in an unbalanced arrangement. The flow of the plate type automatic injection mold is short, only 1/3 of the automatic cavity injection mold, which is easy to form, especially for a multi-cavity. The runner system consists of a main flow channel, a split runner, a runner, and a cavity feed port. The dimension LG identified in Figure 2 is the cavity system inlet K degree LG of the runner system, which is determined by the mold cavity height dimension. So far, the whole The design of the runner system is over.3 Correction of the flow channel system Although the flow plate type automatic injection mold has strict design calculation of the parameters of the flow channel system, it may not achieve the desired effect due to processing and other reasons.
The cavity has a maximum deviation of 5. The arrangement (see Figure 3) is the key. When the mold clamping pressure reaches the pressure set by the press, the injection pump starts to feed, and the press machine The magnetization orientation is started, and the slurry injection screw plug 18 flows through the center pillar 15 to reach the storage chamber 7, and then is distributed to each cavity through the injection tank on the wall of the cavity 4 (in a 1-mode multi-cavity, pull-down type) The demolding method is an example).5%, even if different modes are different. At the same time, the vacuum system of the press starts to pump water. 1). The BCV value of the multi-cavity molding of the same specification can be expressed by the following formula: where A is the cross-sectional area of the injection port of the cavity, mm2 L - the total length of the flow channel from the injection screw plug on the main channel to the cavity inlet port, Mm - cavity inlet length, mm Figure 3 is the corresponding cavity inlet section. After the demagnetization, after the demagnetization delay is over, the lower cylinder of the press is pulled down to expose the blank of the part, the slider on the press is quickly retracted, the blank is removed, and a press forming cycle is completed. It is not difficult to obtain the corresponding section diameter by the previously determined channel system parameters and the BCV must be equal. Balanced type means that the cross-sectional size and length of the shunting channel, the runner and the cavity inlet of the main channel are correspondingly equal. 1. Taking the weight of the blank of the 1st 6-cavity flow path plate type automatic injection mold designed and used by our factory as an example, the statistical analysis of the weight of the formed blank is shown in Table 1. The biggest difference between the flow plate type automatic injection mold and the cavity automatic injection mold is that the flow channel system is different. It is necessary to determine the parameters such as the cross-section ruler 10 and the length of the main channel, the runner, and the runner from the cavity feed door.Design of automatic magnet injection mould for permanent magnet ferrite flow passage
