CN215791453U - Hot runner seals glue structure, hot runner system and injection molding machine - Google Patents
Hot runner seals glue structure, hot runner system and injection molding machine Download PDFInfo
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- CN215791453U CN215791453U CN202120998924.0U CN202120998924U CN215791453U CN 215791453 U CN215791453 U CN 215791453U CN 202120998924 U CN202120998924 U CN 202120998924U CN 215791453 U CN215791453 U CN 215791453U
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Abstract
The utility model provides a hot runner sealing compound structure, a hot runner system and a hot runner sealing compound structure of an injection molding machine, wherein the hot runner sealing compound structure comprises: a hot nozzle and a cavity; the hot nozzle comprises: the hot nozzle comprises a hot nozzle body, at least one hot runner penetrating through the hot nozzle body, a valve needle arranged in the hot runner, and a nozzle sleeve arranged at the discharge end of the hot runner and extending out of the hot nozzle body, wherein the valve needle can penetrate through the nozzle sleeve; the hot nozzle also comprises: the glue sealing sleeve is sleeved on the outer side of the nozzle sleeve, one end of the glue sealing sleeve, extending out of the nozzle sleeve, is a glue outlet end, the valve needle can seal or open a glue outlet hole of the glue outlet end, and the glue outlet end is inserted into a pouring gate of the cavity during glue sealing. The utility model provides a straight-face glue sealing mechanism of a hot runner valve needle aiming at crystalline material injection, and simultaneously a feed back groove is designed on the surface of the valve needle, so that glue generated by sealing the valve needle is enabled to flow back into a hot nozzle, and the situation that the valve needle is prevented from moving to the bottom due to material cooling crystallization is avoided, thereby ensuring stable sealing of the valve needle, solving the defect of high breakpoint of a product and improving the production efficiency.
Description
Technical Field
The utility model belongs to the technical field of hot runners, and particularly relates to a hot runner sealing compound structure, a hot runner system and an injection molding machine.
Background
In the injection molding process of high-crystalline materials, such as PA66 plastic material, a hot runner valve needle molding structure is usually used to seal the injection mold. A conventional hot runner valve needle sealing structure is shown in fig. 1, and includes: the hot body 1 of chewing is run through this hot body 1 and is equipped with at least one hot runner 3, is equipped with needle 4 in hot runner 3, and the working end of needle 4 is the most advanced that a external diameter shrinks gradually, and the terminal surface at most advanced is a straight surface to and the inclined plane of gradual transition of the outer fringe of this straight surface to the lateral wall of needle 4. The end, far away from the working end, of the valve needle 4 is a driving end and is used for being connected with a valve needle 4 driving device of an injection molding machine, and the valve needle 4 can reciprocate along the axial direction of the hot runner 3 under the driving of the driving device; one end of the hot runner 3 is a discharge end and is provided with a nozzle sleeve 5 extending out of the hot nozzle body 1, the end part of the nozzle sleeve 5 far away from the hot nozzle is provided with a glue outlet 51, and the working end of the valve needle 4 can extend out of the hot runner 3 through the glue outlet 51 at the end part of the nozzle sleeve 5 to the sprue 7 of the fixed die outside the hot nozzle body 1, the sprue 7 penetrates through the fixed mold insert 9 and is communicated with the cavity, a funnel-shaped glue injection groove 8 is arranged on the periphery of the sprue, the inclined slope surface of the sprue 7 is matched with the inclined surface of the outer side of the tip end of the valve needle 4, when the end surface of the tip of the valve needle 4 is flush with the bottom surface of the fixed mold insert 9, the outer side inclined plane of the tip of the valve needle 4 is just completely attached to the inclined slope surface of the pouring gate 7, so that the pouring gate 7 is closed to realize injection molding and glue sealing, after the sealing is finished, the hot nozzle is taken in from the outside of the hot nozzle through the glue outlet 51 and the nozzle sleeve 5 returns to the hot runner 3 for the next injection molding and sealing.
The hot runner valve needle sealing structure further comprises a temperature control device and a flow distribution device (not shown in the figure), the other end of the hot runner 3 is a feeding end, the outflow end of the flow distribution device is communicated with the feeding ends of one to a plurality of hot runners 3, the inflow end of the flow distribution device is communicated with an injection port of a heating injection device of an injection molding machine, rubber is heated from the heating injection device of the injection molding machine to be molten and flows into the hot runner 3 in the hot nozzle body 1 from the injection port through the flow distribution device, finally flows out of the hot nozzle body 1 through a rubber outlet 51 opened by the hot runner 3 and the valve needle 4 and enters a cavity through a sprue 7 on a fixed mold insert 9, and the molten rubber is continuously injected into the cavity through the valve needle hot runner sealing structure and gradually fills the whole cavity to realize injection molding of high-crystalline materials. The temperature control device is used for controlling the temperature of the molten colloid in the shunting device so as to meet the injection molding requirements of different crystalline materials.
When the normal valve needle 4 performs the sealing action in the injection molding process: as shown in fig. 2, after the valve needle 4 moves upward (in the direction in which the hot runner 3 is far away from the glue outlet 51) and opens the glue outlet 51, the molten glue material continuously flows from the hot runner 3 inside the hot nozzle body 1 to enter the sprue 7 on the fixed mold insert 9, and then the molten glue material is introduced into the product cavity and starts to perform injection molding on the product; at the end of injection molding: as shown in fig. 3, the valve needle 4 moves downward (in a direction in which the hot runner 3 is close to the glue outlet 51) to penetrate through and close the glue outlet 51 until the working end of the valve needle 4 completely extends into the gate 7 on the fixed mold insert 9, at this time, the end surface of the working end of the valve needle 4 is flush with the bottom surface of the fixed mold insert 9, and the inclined surface of the outer side of the tip end of the valve needle 4 is just completely attached to the inclined slope surface of the gate 7, so that the gate 7 is closed to realize injection molding and glue sealing; because the bottom surface of the fixed mold insert 9 is connected with the cavity, when the end surface of the working end of the valve needle 4 is flush with the bottom surface of the fixed mold insert 9, the break point of the glue opening of the product formed by injection molding is smooth, and the defect of high break point is avoided.
However, since the working end of the conventional valve needle 4 is a pointed end, and the end surface of the pointed end is a straight surface, and a slope gradually transits from the outer edge of the straight surface to the outer sidewall of the valve needle 4, when the working end of the valve needle 4 moves downward through the glue outlet 51, the slope moves downward at the same time, as shown in fig. 4, glue flows along the direction of the arrow in fig. 2, the glue here enters the cavity of the fixed mold plate, and cannot flow back into the hot runner 3 of the hot nozzle body 1 through the gap between the inner sidewall of the glue outlet 51 and the outer sidewall of the valve needle 4, as the temperature of the glue in the cavity decreases, the molten glue of the high-crystalline material solidifies and crystallizes, adheres to and accumulates on the slope outside the straight surface of the working end of the valve needle 4 to form a crystalline layer 10, so that the working end of the valve needle 4 enters the glue sealing groove, and when the slope moves to the position shown in fig. 5, the crystal layer 10 of a layer of high-crystalline material attached and accumulated on the inclined surface is blocked, the inclined surface on the outer side of the tip end of the valve needle 4 cannot enter the position attached to the inclined slope surface of the sprue 7, a gap exists between the inclined surface on the outer side of the tip end of the valve needle 4 and the inclined slope surface of the sprue 7, the straight surface of the working end of the valve needle 4 cannot continuously move downwards until the bottom of the sprue 7 is flush with the bottom of the fixed mold insert 9, the problem that the sprue 7 cannot be sealed due to the fact that the working end of the valve needle 4 does not reach the bottom of the sprue 7 in a product injection molding part is caused, namely the valve needle 4 is unsmooth in sealing, and the injection molding product is connected with residual rubber materials 11 at the sprue 7, namely the defect of high product breaking point is caused.
Therefore, the problems of unsmooth sealing of the valve needle and high breaking point of an injection molding product caused by accumulation of crystallization layers on two side faces of the working end of the valve needle of the traditional hot runner valve needle sealing structure are urgent to solve in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hot runner sealing compound structure, a hot runner system and an injection molding machine, aiming at solving the technical problems of unsmooth sealing compound of a valve needle and high breaking point of an injection molding product caused by accumulation of crystalline layers on two side surfaces of a working end of the valve needle of the existing hot runner sealing compound structure.
In order to solve the problems, the utility model adopts the technical scheme that: a hot runner sealing compound structure is provided, which comprises: a hot nozzle and a cavity; the hot nozzle comprises: the hot nozzle comprises a hot nozzle body, at least one hot runner penetrating through the hot nozzle body, a valve needle arranged in the hot runner, and a nozzle sleeve arranged at the discharge end of the hot runner and extending out of the hot nozzle body, wherein the valve needle can penetrate through the nozzle sleeve;
the hot nozzle also comprises: the glue sealing sleeve is sleeved on the outer side of the nozzle sleeve, one end of the glue sealing sleeve, extending out of the nozzle sleeve, is a glue outlet end, the valve needle can seal or open a glue outlet hole of the glue outlet end, and the glue outlet end is inserted into a pouring gate of the cavity during glue sealing.
Furthermore, go out to glue the end and be straight tube type, go out to glue when the end inserts the runner, go out to glue the first lateral wall of end and be one with the first terminal surface looks vertically straight face of end that glues, and the first inside wall of runner is pressed close to first lateral wall.
Furthermore, the working end of the valve needle can penetrate through the glue outlet at the bottom of the nozzle sleeve and is pushed into the glue outlet at the bottom of the glue sealing sleeve.
Preferably, the working end of the valve needle gradually shrinks through the first transition surface to form a convex column, and the first transition surface is abutted with the second transition surface on the inner side of the rubber sealing sleeve to limit the valve needle.
Preferably, the second outer side wall of the convex column is a straight surface perpendicular to the second end surface of the convex column, the valve needle seals the glue outlet hole by abutting the second outer side wall of the convex column against the second inner side wall of the glue outlet hole of the glue sealing sleeve, and the second end surface is flush with the first end surface.
Furthermore, the periphery of the pouring gate is provided with a funnel-shaped glue injection groove, the pouring gate is connected to the bottom of the glue injection groove, the outer diameter of the bottom of the glue outlet end gradually shrinks towards the direction close to the glue outlet hole to form a third transition surface, and the third transition surface is abutted against the third inner side wall of the glue injection groove to limit the glue sealing sleeve.
Preferably, the protruding column is close to the second outside wall and is provided with at least one feed back groove along the axial direction, and when the protruding column seals the glue outlet, a feed back channel is formed between the feed back groove and the fourth inside wall of the glue outlet.
Furthermore, the end of the rubber sealing sleeve between the mouth sleeve and the hot mouth body is a connecting end, and the connecting end is detachably connected with the hot mouth body.
The utility model also provides a hot runner system, which comprises a temperature control device, a flow distribution device and the hot runner glue sealing structure, wherein the flow distribution device is communicated with the feeding end of the hot runner.
The utility model also provides an injection molding machine, which comprises a heating injection device and the hot runner system, wherein the heating injection device is connected with the flow dividing device; and the driving device is used for driving the valve needle to move along the axial direction of the hot runner.
Compared with the prior art, the hot runner sealing glue structure, the hot runner system and the injection molding machine provided by the utility model have the following beneficial effects:
the hot runner sealing glue structure, the hot runner system and the injection molding machine provided by the utility model have the advantages that the straight-surface sealing glue mechanism of the hot runner valve needle is provided aiming at the injection molding of crystalline materials, and meanwhile, the material return groove is designed on the surface of the valve needle, so that a glue material generated by the sealing glue of the valve needle flows back into the hot nozzle, the phenomenon that the valve needle is prevented from moving to the bottom due to the cooling crystallization of the materials is avoided, the sealing glue of the valve needle is ensured to be stable, the defect of high breakpoint of products is overcome, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional hot runner molding compound;
FIG. 2 is a schematic view of a prior art hot runner adhesive construction with molten compound flowing from the hot runner into the sprue;
FIG. 3 is a schematic diagram illustrating a normal operation of fully inserting a valve pin into a gate to perform a molding operation of a conventional hot runner molding structure;
FIG. 4 is a schematic view illustrating the flow direction of the glue under the inclined surface of the valve needle of the conventional hot runner sealing structure when the inclined surface moves downward;
FIG. 5 is a schematic diagram illustrating a product with a high breaking point defect of a conventional hot runner molding compound structure;
FIG. 6 is a top view of the open state of the valve needle of the hot runner sealing compound structure according to the present invention;
FIG. 7 is a schematic cross-sectional view taken along plane E-E of FIG. 6;
fig. 8 is an enlarged schematic view of a portion G in fig. 7;
FIG. 9 is a top view of the valve pin of the hot runner molding compound structure according to the present invention;
FIG. 10 is a schematic cross-sectional view taken along plane C-C of FIG. 9;
fig. 11 is an enlarged schematic view of a portion F of fig. 10;
FIG. 12 is a schematic perspective view of a valve pin of the hot runner molding compound structure according to the present invention;
FIG. 13 is a front view of a valve pin of the hot runner adhesive sealing structure provided by the present invention;
fig. 14 is a side view of a valve pin of the hot runner molding compound structure provided by the present invention.
Wherein, in the drawings, the reference numerals are mainly as follows:
1-hot nozzle body; 2-a cavity; 3-a hot runner; 4-valve needle; 41-a first transition surface; 42-convex column; 421-a second outer sidewall; 422-a second end face; 423-material return groove; 5-chewing the sleeve; 51-a glue outlet; 52-a fourth inner side wall; 6-sealing a rubber sleeve; 61-glue outlet holes; 62-a first outer side wall; 63-a first end face; 64-a second transition surface; 65-a second inner side wall; 66-a third transition surface; 7-pouring gate; 71-a first inner side wall; 8-glue injection groove; 81-a third inner side wall; 9-fixing the mold insert; 10-a crystalline layer; 11-residual size.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to fig. 5 to 14 and the embodiments.
Referring to fig. 5-14, the present invention provides a hot runner sealing compound structure, which includes a hot nozzle, the hot nozzle includes: a hot nozzle body 1, at least one hot runner 3 (preferably a plurality of hot runners 3 arranged uniformly, as shown) extending through the hot nozzle body 1; in this embodiment, one end of the hot runner 3 is a discharge end, a hollow nozzle sleeve 5 connected to the hot nozzle body 1 is arranged between the discharge end of the hot runner 3 and the hot nozzle body 1, the nozzle sleeve 5 extends out of the hot nozzle body 1 from the periphery of the discharge end of the hot runner 3, the hot runner 3 is extended to the outside of the hot nozzle body 1 by using the hollow channel of the nozzle sleeve 5, the outer diameter of one end of the hot nozzle body 1, which is far away from the hot nozzle body 1, is gradually shrunk, and the end part of the hot nozzle sleeve is provided with a glue outlet 51 communicating the hollow channel of the nozzle sleeve 5 with the hot runner 3 of the hot nozzle body 1. The nozzle sleeve 5 is preferably made of beryllium copper, the beryllium copper has good heat-conducting property, and the molten colloid can be prevented from being retained and condensed at the discharge end of the hot runner 3 of the hot nozzle body 1, so that the glue can be rapidly injected.
The hot runner glue sealing structure provided by the utility model further comprises a cavity 2, in the embodiment, a fixed die is arranged between the cavity 2 and the hot nozzle, and a movable die (not shown in the figure) is arranged at one end of the cavity 2, which is opposite to the fixed die; the fixed die comprises a fixed die insert, the top end of the fixed die insert faces the hot nozzle body 1, and the bottom end of the fixed die insert is connected with the cavity 2; the fixed die insert is provided with a pouring gate 7 which penetrates through the fixed die insert and is communicated with the cavity 2.
The hot runner glue sealing structure provided by the utility model further comprises a valve needle 4 arranged in the hot runner 3, in the embodiment, one end of the valve needle 4 is a working end, the other end of the valve needle 4 is a driving end and is used for being connected with a valve needle 4 driving device of an injection molding machine, the valve needle 4 can be driven by the driving end to reciprocate along the axial direction of the hot runner 3 under the driving of the driving device, the driving device is preferably a hydraulic driving device, and the hydraulic driving device can form a hydraulic loop to drive the driving end of the valve needle 4, so that the movement of opening and closing the hot runner 3 of the valve needle 4 is realized, and the injection of molten sizing materials into the cavity 2 is controlled or stopped. The working end of the valve needle 4 can extend out of the hot runner 3 to the outside of the hot nozzle body 1 through the end glue outlet 51 of the nozzle sleeve 5.
The hot runner glue sealing structure provided by the utility model further comprises a glue sealing sleeve 6 sleeved outside the nozzle sleeve 5, wherein one end of the glue sealing sleeve 6, which extends out of the nozzle sleeve 5, is a glue outlet end, and the glue outlet end is provided with a glue outlet 51 communicated with the nozzle sleeve 5, a hollow channel and a glue outlet hole 61 of the hot runner 3 of the hot nozzle body 1. The working end of the valve needle 4 can be pushed into and closed or withdrawn and open the glue outlet 61 after passing through the glue outlet 51. When the glue is sealed, the glue outlet end of the glue sealing sleeve 6 is inserted into the sprue 7 of the fixed mould insert and communicated with the cavity 2.
In this embodiment, the glue discharging end is straight, when the glue discharging end is inserted into the gate 7, the first outer sidewall 62 of the glue discharging end is a straight surface perpendicular to the first end surface 63 of the glue discharging end, the first outer sidewall 62 is adjacent to the first inner sidewall 71 of the gate 7, the first inner sidewall 71 is a straight surface perpendicular to the bottom of the stationary mold insert, and the first end surface 63 is parallel to the bottom of the stationary mold insert, i.e. the first inner sidewall 71 is parallel to the first outer sidewall 62, and the first outer sidewall 71 and the first outer sidewall are closely arranged with a slight gap, so that the glue discharging end is inserted into the gate 7 during assembly, and the glue discharging end exits from the gate 7 during disassembly, meanwhile, because the first end surface 63 is parallel to the bottom of the stationary mold insert, the first inner sidewall 71 and the first outer sidewall 62 are straight surfaces perpendicular to the bottom of the stationary mold insert, and the bottom of the stationary mold insert is connected to the cavity 2, so that the first inner sidewall 71 and the first outer sidewall 62 are both perpendicular to the cavity 2, therefore, the molten colloid in the cavity 2 is difficult to flow out through the fine gap between the first inner side wall 71 and the first outer side wall 62, and the joint of the glue outlet end of the glue sealing sleeve 6 and the fixed die insert is ensured to meet the blocking effect on the molten colloid in the cavity 2. In a preferred embodiment, the first end surface 63 is flush with the bottom end of the fixed mold insert, so that after the injection molding material is molded in the cavity 2, the molded product is kept flat at the position corresponding to the first end surface 63 of the glue outlet end of the glue sealing sleeve 6 and the bottom end of the adjacent corresponding fixed mold insert.
In a preferred embodiment, the working end of the valve needle 4 is gradually contracted by the first transition surface 41 to form a convex column 42, and the first transition surface 41 is abutted with the second transition surface 64 on the inner side of the sealing sleeve 6 to limit the valve needle 4. As a more preferable embodiment, the protruding pillar 42 is a cylinder, the second outer sidewall 421 of the protruding pillar 42 is a straight surface perpendicular to the second end surface 422 of the protruding pillar 42, the valve needle 4 abuts against the second inner sidewall 65 of the glue outlet hole 61 of the glue sealing sleeve 6 through the second outer sidewall 421 of the protruding pillar 42 to seal the glue outlet hole 61, and the second end surface 422 is flush with the first end surface 63, that is, flush with the bottom of the glue outlet hole 61, so as to ensure that after the glue injection molding material is molded in the cavity 2, the molded product is kept flush with the second end surface 422 of the adjacent corresponding protruding pillar 42 at the corresponding position of the first end surface 63 of the glue outlet end of the glue sealing sleeve 6.
In a preferred embodiment, at least one material return groove 423 is axially formed in the second outer side wall 421 of the valve needle 4 close to the protruding column 42, and when the protruding column 42 seals the glue outlet 61, a material return channel is formed between the material return groove 423 and the fourth inner side wall 52 of the glue outlet 51 of the chewing gum 5. In a preferred embodiment, the outer diameter of valve needle 4 is smaller than the inner diameter of glue outlet 51 of nozzle sleeve 5 to provide clearance between valve needle 4 and glue outlet 51 for backflow of glue.
In this embodiment, a funnel-shaped glue injection groove 8 is formed around the gate 7, the glue injection groove 8 is formed in one end, away from the cavity 2, of the gate 7 and is a groove recessed from the surface of the fixed mold, the outer diameter of the glue injection groove 8 gradually shrinks in the direction close to the cavity 2, the gate 7 is connected to the bottom of the glue injection groove 8, the outer diameter of the bottom of the glue outlet end gradually shrinks in the direction close to the glue outlet hole 61 to form a third transition surface 66 (the third transition surface 66 is preferably a conical surface), and the third transition surface 66 abuts against a third inner side wall 81 of the cavity to limit the glue sealing sleeve 6.
In this embodiment, one end of the sealing rubber sleeve 6 between the nozzle sleeve 5 and the hot nozzle body 1 is a connecting end, and the connecting end is detachably connected with the hot nozzle body 1. The connecting end is preferably connected with the hot nozzle body 1 through threads, and can also be clamped.
The working principle of the hot runner sealing adhesive structure provided by the utility model is as follows:
referring to the drawing, the working end of the valve needle 4 can extend out of the hot runner 3 through the glue outlet 51 at the end of the nozzle sleeve 5 to the gate 7 of the fixed mold insert outside the hot nozzle body 1 for sealing, and the second end surface 422 of the convex column 42 of the valve needle 4 is made to enter into the position flush with the first end surface 63 of the sealing sleeve 6, that is, flush with the bottom of the glue outlet hole 61, so as to ensure that the molded product keeps flush with the second end surface 422 of the adjacent corresponding convex column 42 at the position corresponding to the first end surface 63 of the glue outlet of the sealing sleeve 6 after the injection molding material is molded in the cavity 2. After the sealing is finished, the valve needle 4 is withdrawn from the pouring gate 7, and then is taken in from the outside of the hot nozzle body 1 through the glue outlet 51 and the nozzle sleeve 5 to return to the hot runner 3 for the next injection molding and sealing.
When the valve needle 4 passes through the glue outlet 51 of the nozzle sleeve 5 to move towards the glue outlet 61 of the glue sealing sleeve 6, because the glue sealing sleeve 6 is sleeved outside the nozzle sleeve 5, the first outer side wall 62 of the glue sealing sleeve 6 is a straight surface and is close to the first inner side wall 71 of the sprue 7, and the second inner side wall 65 of the glue sealing sleeve 6 extends from the glue outlet end of the glue sealing sleeve 6 extending out of the nozzle sleeve 5 to the glue outlet 51 facing the nozzle sleeve 5, the molten glue flowing out of the glue outlet 51 of the nozzle sleeve 5 is improved from a traditional cavity gradually shrinking along the second inner side wall 65 of the glue sealing sleeve 6 to enter the glue outlet 61 at the bottom of the glue outlet end of the glue sealing sleeve 6 through the whole sprue 7, at the moment, the flow direction of the glue at the mouth part of the glue outlet 51 of the nozzle sleeve 5 is shown in the figure, the molten glue at the mouth part of the glue outlet 51 can pass through the backflow channel between the glue return groove 423 of the valve needle 4 and the glue outlet 51 of the nozzle sleeve 5 along the second inner side wall 65 of the glue sealing sleeve 6 under the extrusion effect of downward movement of the working end of the valve needle 4, is extruded back into the hot nozzle body 1, and because the hot nozzle body 1 is always in the heating and heat preservation, the high-crystalline materials can not block the glue outlet 51 due to the temperature reduction, so that the valve needle 4 can not move downwards continuously and the breaking point of the product is high.
Meanwhile, the glue outlet 51 of the mouth sleeve 5 is separated from the glue injection groove 8 of the fixed mold insert by the glue sealing sleeve 6, and under the extrusion action of downward movement of the working end of the valve needle 4, molten glue at the mouth of the glue outlet 51 cannot flow between the third transition surface 66 outside the glue sealing sleeve 6 and the third inner side wall 81 of the glue injection groove 8, so that the downward movement of the glue sealing sleeve 6 due to crystallization and accumulation of the third transition surface 66 of the glue sealing sleeve 6 is not blocked, and the high defect of product breakpoints caused by the fact that the first end surface 63 of the glue outlet end of the glue sealing sleeve 6 cannot be leveled with the bottom end of the fixed mold insert is avoided. In addition, the working end of the valve needle 4 is gradually contracted by the first transition surface 41 to form a convex column 42, after the first transition surface 41 extends out of the glue outlet 51 of the mouth sleeve 5, even though the crystalline material layer may be deposited on the inclined first transition surface 41, since the second outer sidewall 421 of the convex pillar 42 is a straight surface perpendicular to the second end surface 422 of the convex pillar 42, the valve needle 4 seals the glue outlet hole 61 by the abutment of the second outer sidewall 421 of the convex pillar 42 and the second inner sidewall 65 of the glue outlet hole 61 of the glue sealing sleeve 6, whether the first transition surface 41 is accumulated with the crystallization material layer or not does not affect the abutting of the second outer side wall 421 of the convex column 42 and the second inner side wall 65 of the glue outlet hole 61 of the glue sealing sleeve 6 and seals the glue outlet hole 61, so that the second end surface 422 can enter into the same level with the first end surface 63 without being hindered, and the quality defect of high breaking points of the crystallization material, especially the high crystallization material, such as a PA66+ glass fiber plastic-coated rotor product, is solved.
The hot runner valve needle sealing compound structure further comprises a temperature control device and a flow dividing device, the other end of the hot runner 3 is a feeding end, the outflow end of the flow dividing device is communicated with the feeding ends of one to a plurality of hot runners 3, the inflow end of the flow dividing device is communicated with an injection port of a heating injection device of an injection molding machine, glue is heated from the heating injection device of the injection molding machine to be molten and flows into the hot runner 3 in the hot runner body 1 from the injection port through the flow dividing device, finally flows out of the hot runner body 1 through a glue outlet 51 opened by the hot runner 3 and the valve needle 4 and flows into the cavity 2 through a pouring gate 7 on the fixed mold insert, and the molten glue is continuously injected into the cavity 2 through the hot runner valve needle sealing compound structure and gradually fills the whole cavity 2 to realize the injection molding of high-crystalline materials. The temperature control device is used for controlling the temperature of the molten colloid in the shunting device so as to meet the injection molding requirements of different crystalline materials.
The utility model also provides a hot runner system, which comprises a temperature control device and a flow dividing device, wherein the flow dividing device comprises the hot runner glue sealing structure, and the flow dividing device is connected with the feeding end of the hot runner 3.
The utility model also provides an injection molding machine, which comprises a heating injection device and the hot runner system, wherein the heating injection device is connected with the flow dividing device; and a driving device for driving the valve needle 4 to move along the axial direction of the hot runner 3.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A hot runner seals and glues structure, includes: a hot nozzle and a cavity; the hot nozzle comprises: the hot nozzle comprises a hot nozzle body, at least one hot runner penetrating through the hot nozzle body, a valve needle arranged in the hot runner, and a nozzle sleeve arranged at the discharge end of the hot runner and extending out of the hot nozzle body, wherein the valve needle can penetrate through the nozzle sleeve; the method is characterized in that:
the hot nozzle further comprises: the glue sealing sleeve is sleeved on the outer side of the nozzle sleeve, one end of the glue sealing sleeve, extending out of the nozzle sleeve, is a glue outlet end, the valve needle can seal or open a glue outlet hole of the glue outlet end, and the glue outlet end is inserted into a pouring gate of the cavity during glue sealing.
2. The hot runner molding compound structure of claim 1, wherein the glue outlet end is a straight cylinder, and when the glue outlet end is inserted into the gate, a first outer sidewall of the glue outlet end is a straight surface perpendicular to a first end surface of the glue outlet end, and the first outer sidewall is proximate to a first inner sidewall of the gate.
3. The hot runner adhesive sealing structure of claim 2, wherein the working end of the valve needle can pass through the adhesive outlet at the bottom of the sprue bushing and push into the adhesive outlet at the bottom of the adhesive sealing bushing.
4. The hot runner sealant structure of claim 3, wherein the working end of the valve needle is gradually contracted to form a convex column by a first transition surface, and the first transition surface abuts against a second transition surface on the inner side of the sealant sleeve to limit the valve needle.
5. The hot runner molding compound structure of claim 4, wherein the second outer sidewall of the protruding pillar is a straight surface perpendicular to the second end surface of the protruding pillar, the valve needle abuts against the second inner sidewall of the glue outlet hole of the sealing compound sleeve through the second outer sidewall of the protruding pillar to seal the glue outlet hole, and the second end surface is flush with the first end surface.
6. The hot runner molding compound structure of claim 2, wherein a funnel-shaped molding compound groove is formed around the gate, the gate is connected to the bottom of the molding compound groove, an outer diameter of the bottom of the molding compound outlet end gradually shrinks in a direction approaching the molding compound hole to form a third transition surface, and the third transition surface abuts against a third inner side wall of the molding compound groove to limit the molding compound sleeve.
7. The hot runner molding compound structure of claim 5, wherein at least one material return groove is axially disposed on the protruding pillar near the second outer sidewall, and when the protruding pillar seals the glue outlet hole, a material return channel is formed between the material return groove and a fourth inner sidewall of the glue outlet.
8. The hot runner adhesive sealing structure according to any one of claims 1 to 7, wherein one end of the adhesive sealing sleeve between the nozzle sleeve and the hot nozzle body is a connecting end, and the connecting end is detachably connected with the hot nozzle body.
9. The hot runner system comprises a temperature control device and a flow dividing device, and is characterized by further comprising the hot runner sealing compound structure as claimed in any one of claims 1 to 8, wherein the flow dividing device is communicated with a feeding end of the hot runner.
10. An injection molding machine comprising a heated injection apparatus, further comprising the hot runner system of claim 9, wherein said heated injection apparatus is connected to said manifold; and the driving device is used for driving the valve needle to move along the axial direction of the hot runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120998924.0U CN215791453U (en) | 2021-05-11 | 2021-05-11 | Hot runner seals glue structure, hot runner system and injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120998924.0U CN215791453U (en) | 2021-05-11 | 2021-05-11 | Hot runner seals glue structure, hot runner system and injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215791453U true CN215791453U (en) | 2022-02-11 |
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|---|---|---|---|
| CN202120998924.0U Active CN215791453U (en) | 2021-05-11 | 2021-05-11 | Hot runner seals glue structure, hot runner system and injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215791453U (en) |
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2021
- 2021-05-11 CN CN202120998924.0U patent/CN215791453U/en active Active
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