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The design of the injection molding processing mold gate
by：CSSSLD
2021-02-03
Side gate called standard gate abroad, side gate generally opened in the parting surface, plastic melt from the medial or lateral fill mold cavity injection molding processing, the cross section shape of rectangular, change the width of the gate and thickness can be adjusted by the shear rate of melt and gate freeze time.
This type of gate can choose according to the characters of the shape of the plastic parts of its location, convenient processing and repair, so it is applied more widely a form of gate, widely used in small and medium, the multi-cavity mould and adapted to all kinds of plastic molding are stronger.
gate also known as the feeding port, is connected to the distributary channel and cavity of the melt channel. Design and the location of the gate are appropriate or not, is directly related to the plastic parts can be in good condition, high quality injection molding. Gate can be divided into restrictive gate and nonrestrictive gate two kinds big. Restrictive gate is the pouring system section size of the smallest parts, by a sudden change in the cross-sectional area, the shunt way from the plastic melt mutated velocity increased, to improve the shear rate, viscosity reduction, makes it the ideal state of flow, balanced with cavity thus and quickly.
at the bottom of the class when the cylinder or shell plastic parts center or close to the center hole, the gate will open at the orifice, center set shunt operation at the same time, this type of watering the brash center gate. Center gate is actually the gate of a kind of special form directly, it has a series of advantages of direct gate, and overcome the direct gate defects such as shrinkage cavity, deformation. Center gate is part of a transverse feeding ring gate, when the design, the thickness of the ring is generally not less than zero. 5mm。 When the area is larger than the mainstream way small end of the inlet ring area, gate is a restrictive type gate, on the other hand, the gate as restrictive type gate.
for multi-cavity mould, adjust the size of the gate, still can make the balance layout of cavity to achieve the purpose of the feed at the same time, improve the quality of plastic parts. In addition, restrictive gate plays an early curing to prevent the reverse melt in the cavity. A nonrestrictive gate is the section size of the largest in the runner system, it is mainly for large cylinder, shell plastic parts plays a role of guide and feeder after cavity.
direct gate is also called the mainstream type gate, he belongs to a nonrestrictive gate. Plastic melt into the cavity directly by the mainstream way of the big end, and therefore has a small flow resistance, flow path, short and feeding time is long, etc. Due to direct effect on the plastic injection molding pressure, so easier to create a larger residual stress in the feed and cause plastic parts warp distortion. This form of gate section, remove the gate is difficult, will leave big gate after removing trace, effect the beauty of the plastic parts.
distributary channel in the parting surface decorate a form to the layout of the cavity in the parting surface and form are closely related, if the cavity is round shape distribution, the distributary channel in radial layout. If the cavity rectangular shape distribution, the shunt way generally USES & other Throughout the &; Word form layout. Although there are a number of different shunt way decorate a form, but should follow two principles: one is the arrangement should be compact, reduce the template size. The other is a process to short as far as possible, symmetrical layout, force at the center of the expansion mould and injection molding processing equipment the center of the clamping force. Distributary channel of the commonly used decorate a form to have a balanced and non-equilibrium type two kinds, the multi-cavity balanced and unbalanced type of arrangement is the same.
when designing sprue directly, in order to reduce contact with plastic parts in the gate area and prevent it from defects such as shrinkage cavity, deformation, on the one hand, should choose as far as possible the mainstream of smaller taper cone Angle, on the other hand try to narrow the template and the fixed mould plate thickness. Direct runner gating system has a good state of melt flow, plastic melt flowing from cavity bottom center parting surface, is conducive to eliminate the deep cavity of gas discharge faults not easily, the exhaust flow. Such form of gate, make plastic parts and gating system in the parting plane projection of the smallest, the mould structure is compact, to receive strength evenly in injection molding machine.
more excellent articles: processing injection molding pressure, click directly.
http://www。 csssld。 cn//html/2017/Info_0514/576。 HTML
nantong on suye's official website: http://www. csssld。 Cn / /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
gate also known as the feeding port, is connected to the distributary channel and cavity of the melt channel. Design and the location of the gate are appropriate or not, is directly related to the plastic parts can be in good condition, high quality injection molding. Gate can be divided into restrictive gate and nonrestrictive gate two kinds big. Restrictive gate is the pouring system section size of the smallest parts, by a sudden change in the cross-sectional area, the shunt way from the plastic melt mutated velocity increased, to improve the shear rate, viscosity reduction, makes it the ideal state of flow, balanced with cavity thus and quickly.
at the bottom of the class when the cylinder or shell plastic parts center or close to the center hole, the gate will open at the orifice, center set shunt operation at the same time, this type of watering the brash center gate. Center gate is actually the gate of a kind of special form directly, it has a series of advantages of direct gate, and overcome the direct gate defects such as shrinkage cavity, deformation. Center gate is part of a transverse feeding ring gate, when the design, the thickness of the ring is generally not less than zero. 5mm。 When the area is larger than the mainstream way small end of the inlet ring area, gate is a restrictive type gate, on the other hand, the gate as restrictive type gate.
for multi-cavity mould, adjust the size of the gate, still can make the balance layout of cavity to achieve the purpose of the feed at the same time, improve the quality of plastic parts. In addition, restrictive gate plays an early curing to prevent the reverse melt in the cavity. A nonrestrictive gate is the section size of the largest in the runner system, it is mainly for large cylinder, shell plastic parts plays a role of guide and feeder after cavity.
direct gate is also called the mainstream type gate, he belongs to a nonrestrictive gate. Plastic melt into the cavity directly by the mainstream way of the big end, and therefore has a small flow resistance, flow path, short and feeding time is long, etc. Due to direct effect on the plastic injection molding pressure, so easier to create a larger residual stress in the feed and cause plastic parts warp distortion. This form of gate section, remove the gate is difficult, will leave big gate after removing trace, effect the beauty of the plastic parts.
distributary channel in the parting surface decorate a form to the layout of the cavity in the parting surface and form are closely related, if the cavity is round shape distribution, the distributary channel in radial layout. If the cavity rectangular shape distribution, the shunt way generally USES & other Throughout the &; Word form layout. Although there are a number of different shunt way decorate a form, but should follow two principles: one is the arrangement should be compact, reduce the template size. The other is a process to short as far as possible, symmetrical layout, force at the center of the expansion mould and injection molding processing equipment the center of the clamping force. Distributary channel of the commonly used decorate a form to have a balanced and non-equilibrium type two kinds, the multi-cavity balanced and unbalanced type of arrangement is the same.
when designing sprue directly, in order to reduce contact with plastic parts in the gate area and prevent it from defects such as shrinkage cavity, deformation, on the one hand, should choose as far as possible the mainstream of smaller taper cone Angle, on the other hand try to narrow the template and the fixed mould plate thickness. Direct runner gating system has a good state of melt flow, plastic melt flowing from cavity bottom center parting surface, is conducive to eliminate the deep cavity of gas discharge faults not easily, the exhaust flow. Such form of gate, make plastic parts and gating system in the parting plane projection of the smallest, the mould structure is compact, to receive strength evenly in injection molding machine.
more excellent articles: processing injection molding pressure, click directly.
http://www。 csssld。 cn//html/2017/Info_0514/576。 HTML
nantong on suye's official website: http://www. csssld。 Cn / /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
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