CN217514471U - Pre-molding powder screw injection mechanism of injection molding machine - Google Patents
Pre-molding powder screw injection mechanism of injection molding machine Download PDFInfo
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- CN217514471U CN217514471U CN202220885086.0U CN202220885086U CN217514471U CN 217514471 U CN217514471 U CN 217514471U CN 202220885086 U CN202220885086 U CN 202220885086U CN 217514471 U CN217514471 U CN 217514471U
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Abstract
The utility model provides a formula powder screw rod injection mechanism is moulded in advance of injection molding machine relates to the injection molding machine field. The powder screw injection mechanism comprises an injection unit, a pre-molding unit and a transition unit; the injection unit comprises an injection tube and a plunger rod, the injection tube is provided with a nozzle, the injection tube is provided with a first feed inlet, and the injection tube is provided with a first heating unit; the pre-molding unit comprises a pre-molding cylinder and a powder screw, the pre-molding cylinder is provided with a second feeding hole and a discharging hole, and the pre-molding cylinder is provided with a second heating unit; the transition unit comprises a flow guide straight pipe, the flow guide straight pipe is communicated with a discharge hole of the pre-plastic cylinder, the annular side of the flow guide straight pipe is communicated with a flow guide bent pipe, the flow guide bent pipe is communicated with a first feed hole of the injection cylinder, an adjusting piston used for sealing a port of the flow guide bent pipe is slidably arranged on the flow guide straight pipe, the flow guide straight pipe is provided with a telescopic rod driving the adjusting piston to slide, and the flow guide straight pipe and the flow guide bent pipe are both provided with third heating units. The utility model discloses can avoid the injection unit and mould the problem of blockking up between the unit in advance.
Description
Technical Field
The utility model relates to an injection molding machine technical field particularly, relates to a formula powder screw rod injection mechanism is moulded in advance of injection molding machine.
Background
An injection molding machine is also known as an injection molding machine or an injection machine. It is a main forming equipment for making various shaped plastic products from thermoplastic plastics or thermosetting plastics by using plastic forming mould. The device is divided into a vertical type, a horizontal type and a full-electric type. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity.
The injection system is one of the most important components of an injection machine and is generally divided into three main forms of plunger type, screw type and screw pre-molded plunger injection type. The currently used screw pre-plastic plunger injection type mainly comprises an injection mechanism and a pre-plastic mechanism which are matched with each other, wherein the pre-plastic mechanism is communicated with the injection mechanism, the pre-plastic mechanism is used for plasticizing and melting raw materials, and a melt after the plasticizing and melting flows into the injection mechanism and is injected into a mold through the injection mechanism. In order to prevent the melt in the injection mechanism from flowing back to the pre-molding mechanism in the process, a check valve is arranged between the pre-molding mechanism and the injection mechanism to prevent the melt from flowing back, the melt can be condensed when flowing into the check valve, and the check valve is slightly limited and is blocked. And when the injection mechanism and the pre-molding mechanism are communicated through the runner, the temperature at the runner is low, so that the condensation of the melt in the runner is easy to cause, and the conveying of the melt is not facilitated.
In summary, we propose a pre-molding powder screw injection mechanism of an injection molding machine to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a formula powder screw rod injection mechanism is moulded in advance of injection molding machine, when the material stream of fuse state entered water conservancy diversion return bend and water conservancy diversion straight tube, through the continuous heating of third heating unit, the condensation of interior fused material of traditional runner has been avoided, and adopts the cooperation mode of water conservancy diversion straight tube, water conservancy diversion return bend, adjusting piston and telescopic link, for traditional check valve, can avoid the injection unit and mould the problem of blockking up between the unit in advance.
The embodiment of the utility model is realized like this:
the embodiment of the application provides a pre-molding powder screw injection mechanism of an injection molding machine, which comprises an injection unit, a pre-molding unit and a transition unit;
the injection unit comprises an injection tube and a plunger rod matched with the injection tube in an injection manner, the injection tube is provided with a nozzle matched with the injection tube in an injection manner, the injection tube is provided with a first feeding hole, and the injection tube is provided with a first heating unit;
the pre-molding unit comprises a pre-molding cylinder and a powder screw matched with the pre-molding cylinder in a processing manner, the pre-molding cylinder is provided with a second feeding hole and a discharging hole, the second feeding hole is formed in the discharging section of the powder screw, the discharging hole is formed in the tail end of the metering section of the powder screw, and the pre-molding cylinder is provided with a second heating unit;
the transition unit comprises a flow guide straight pipe with one sealed end, the open end of the flow guide straight pipe is communicated with a discharge hole of the pre-plastic barrel, the annular side of the flow guide straight pipe is communicated with a flow guide bent pipe, one end, far away from the flow guide straight pipe, of the flow guide bent pipe is communicated with a first feed hole of the injection barrel, the flow guide straight pipe is slidably provided with an adjusting piston used for sealing a port of the flow guide bent pipe, the flow guide straight pipe is provided with a telescopic rod driving the adjusting piston to slide, and the flow guide straight pipe and the flow guide bent pipe are both provided with third heating units.
In some embodiments of the present invention, the first heating unit, the second heating unit and the third heating unit are heating wires, the first heating unit is disposed inside the injection tube, the second heating unit is disposed inside the pre-molding tube, and the third heating unit is disposed inside the diversion straight tube or the diversion bent tube.
In some embodiments of the present invention, the connection between the flow guiding straight tube and the pre-plastic cylinder and the connection between the flow guiding bent tube and the injection cylinder are detachable through a bolt assembly.
In some embodiments of the present invention, a gasket is disposed between the diversion straight pipe and the pre-plastic cylinder, and between the diversion bent pipe and the injection cylinder.
In some embodiments of the present invention, the above-mentioned telescopic rod is a hydraulic telescopic rod.
The utility model discloses an in some embodiments, above-mentioned second feed inlet is provided with the toper and fights, and the small-bore end that above-mentioned toper was fought docks with above-mentioned second feed inlet.
In some embodiments of the present invention, the diversion straight pipe and the diversion bent pipe are integrally formed.
In some embodiments of the present invention, the diversion straight pipe and the diversion bent pipe are made of a heat insulating material.
In some embodiments of the present invention, the powder screw transmission is connected to a pre-molding motor, and the pre-molding motor is a common three-phase motor.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:
a pre-molding type powder screw injection mechanism of an injection molding machine comprises an injection unit, a pre-molding unit and a transition unit; the injection unit comprises an injection tube and a plunger rod matched with the injection tube in an injection manner, the injection tube is provided with a nozzle matched with the injection tube in an injection manner, the injection tube is provided with a first feeding hole, and the injection tube is provided with a first heating unit; the pre-molding unit comprises a pre-molding cylinder and a powder screw matched with the pre-molding cylinder in a processing manner, the pre-molding cylinder is provided with a second feeding hole and a discharging hole, the second feeding hole is formed in the discharging section of the powder screw, the discharging hole is formed in the tail end of the metering section of the powder screw, and the pre-molding cylinder is provided with a second heating unit; the transition unit comprises a flow guide straight pipe with one sealed end, the open end of the flow guide straight pipe is communicated with a discharge hole of the pre-plastic barrel, the annular side of the flow guide straight pipe is communicated with a flow guide bent pipe, one end, far away from the flow guide straight pipe, of the flow guide bent pipe is communicated with a first feed hole of the injection barrel, the flow guide straight pipe is slidably provided with an adjusting piston used for sealing a port of the flow guide bent pipe, the flow guide straight pipe is provided with a telescopic rod driving the adjusting piston to slide, and the flow guide straight pipe and the flow guide bent pipe are both provided with third heating units.
The utility model discloses when injecting, make the telescopic link drive the adjusting piston and slide, the adjusting piston can not form the jam to water conservancy diversion return bend port, add the raw materials to the pre-plastic cylinder through the second feed inlet of pre-plastic cylinder, make the powder screw rod rotate, and make third heating unit, second heating unit and first heating unit heating, the powder screw rod makes the material that falls into the spiral shell groove impel to the discharge gate continuously, the second heating unit transmits the heat to the material in the spiral shell groove, the material is under heating and the rotatory shearing dual function of powder screw rod, reach plastify and fused purpose; the molten material enters the diversion straight pipe through the discharge hole, flows into the diversion bent pipe and finally flows into the injection cylinder through the diversion bent pipe; when injection is to be carried out, the telescopic rod is adjusted, the telescopic rod enables the adjusting piston to achieve sealing of the diversion elbow, backflow of molten materials is avoided, and then the plunger rod pushes the molten materials to be ejected directionally from the nozzle. In the process, when the molten materials flow into the diversion elbow pipe and the diversion straight pipe, the third heating unit continuously heats the materials, so that the condensation of the molten materials in the traditional flow channel is avoided, and the blockage problem can be avoided compared with the traditional check valve by adopting the matching mode of the diversion straight pipe, the diversion elbow pipe, the adjusting piston and the telescopic rod.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a pre-molding powder screw injection mechanism of an injection molding machine according to an embodiment of the present invention;
fig. 2 is a partially enlarged view of a in fig. 1.
Icon: 1-nozzle, 2-injection tube, 3-telescopic rod, 4-flow guiding straight tube, 5-premold tube, 6-powder screw, 7-conical hopper, 8-first heating unit, 9-second heating unit, 10-flow guiding bent tube, 11-third heating unit, 12-plunger rod and 13-regulating piston.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "suspended" and the like do not require that the components be absolutely horizontal or suspended, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" means at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "set", "mounted", "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Examples
Referring to fig. 1 and fig. 2, the present embodiment provides a pre-molding powder screw 6 injection mechanism of an injection molding machine, which includes an injection unit, a pre-molding unit and a transition unit;
the injection unit comprises an injection tube 2 and a plunger rod 12 matched with the injection tube 2 in an injection manner, the injection tube 2 is provided with a nozzle 1 matched with the injection tube 2 in an injection manner, the injection tube 2 is provided with a first feeding hole, and the injection tube 2 is provided with a first heating unit 8;
the pre-molding unit comprises a pre-molding cylinder 5 and a powder screw 6 matched with the pre-molding cylinder 5 in a processing way, the pre-molding cylinder 5 is provided with a second feeding hole and a discharging hole, the second feeding hole is formed in the discharging section of the powder screw 6, the discharging hole is formed in the tail end of the metering section of the powder screw 6, and the pre-molding cylinder 5 is provided with a second heating unit 9;
the transition unit comprises a flow guide straight pipe 4 with one sealed end, the open end of the flow guide straight pipe 4 is communicated with the discharge hole of the pre-plastic cylinder 5, the annular side of the flow guide straight pipe 4 is communicated with a flow guide bent pipe 10, one end, far away from the flow guide straight pipe 4, of the flow guide bent pipe 10 is communicated with the first feed inlet of the injection cylinder 2, the flow guide straight pipe 4 is provided with an adjusting piston 13 used for sealing the port of the flow guide bent pipe 10 in a sliding mode, the flow guide straight pipe 4 is provided with an expansion link 3 driving the adjusting piston 13 to slide, and the flow guide straight pipe 4 and the flow guide bent pipe 10 are both provided with a third heating unit 11.
The utility model discloses when injecting, make telescopic link 3 drive adjusting piston 13 and slide, adjusting piston 13 can not form the jam to water conservancy diversion return bend 10 port, add the raw materials in to the premolded section of thick bamboo 5 through the second feed inlet of premolded section of thick bamboo 5, make powder screw 6 rotate, and make third heating unit 11, second heating unit 9 and first heating unit 8 heat, powder screw 6 makes the material that falls into the spiral shell groove impel to the discharge gate continuously, second heating unit 9 transmits the heat to the material in the spiral shell groove, the material reaches plastify and fused purpose under heating and the rotatory shearing dual function of powder screw 6; the molten material enters the diversion straight pipe 4 through the discharge hole, flows into the diversion bent pipe 10, and finally flows into the injection tube 2 through the diversion bent pipe 10; when injection is to be performed, the telescopic rod 3 is adjusted, the telescopic rod 3 enables the adjusting piston 13 to achieve sealing of the diversion elbow 10, backflow of molten materials is avoided, and then the plunger rod 12 pushes the molten materials to be directionally sprayed out from the nozzle 1. In the process, when the molten material flows into the diversion elbow pipe 10 and the diversion straight pipe 4, the third heating unit 11 continuously heats the molten material, so that the condensation of the molten material in the traditional flow channel is avoided, and the matching mode of the diversion straight pipe 4, the diversion elbow pipe 10, the adjusting piston 13 and the telescopic rod 3 is adopted, so that the problem of blockage can be avoided compared with the traditional check valve.
In some embodiments of the present invention, the first heating unit 8, the second heating unit 9 and the third heating unit 11 are heating wires, the first heating unit 8 is disposed inside the injection tube 2, the second heating unit 9 is disposed inside the pre-molding tube 5, and the third heating unit 11 is disposed inside the diversion straight tube 4 or the diversion bent tube 10.
In the above embodiment, the heating wire is disposed inside the injection tube 2, the pre-plastic tube 5, the flow guiding straight tube 4 or the flow guiding bent tube 10, and can be directly contacted with the melt material, so that the heating effect of the melt material is better.
In some embodiments of the present invention, the diversion straight tube 4 and the pre-plastic cylinder 5, and the diversion bent tube 10 and the injection cylinder 2 are detachably connected by a bolt set.
In the above embodiment, the opposite sides of the diversion straight pipe 4 and the pre-plastic cylinder 5 are provided with flanges, the opposite sides of the diversion bent pipe 10 and the injection cylinder 2 are provided with flanges, and the two sets of flanges are detachably connected through the bolt set, so that the detachable design of the transition unit is realized, and the transition unit is convenient to maintain and overhaul.
In some embodiments of the present invention, gaskets are disposed between the diversion straight pipe 4 and the pre-plastic cylinder 5, and between the diversion bent pipe 10 and the injection cylinder 2.
In the above embodiment, the gasket can increase the sealing performance between the flow guide straight pipe 4 and the pre-plastic cylinder 5 and between the flow guide bent pipe 10 and the injection cylinder 2, and avoid the leakage of the molten material.
In some embodiments of the present invention, the above-mentioned telescopic rod 3 is a hydraulic telescopic rod 3.
In the above embodiment, the hydraulic telescopic rod 3 is used as a power source for the adjusting piston 13, and has the advantage of stable power output.
The utility model discloses an in some embodiments, above-mentioned second feed inlet is provided with the toper and fights 7, and the small-bore end and the butt joint of above-mentioned second feed inlet of above-mentioned toper fill 7.
In some embodiments of the present invention, the diversion straight tube 4 and the diversion bent tube 10 are integrally formed.
In the above embodiment, the straight diversion pipe 4 and the bent diversion pipe 10 are integrally formed, so that the structure of the transition unit is more stable.
In some embodiments of the present invention, the diversion straight pipe 4 and the diversion elbow 10 are made of a heat insulating material.
In the above embodiment, the diversion straight pipe 4 and the diversion elbow pipe 10 made of the heat insulating material avoid heat loss, so that the heating effect of the third heating unit 11 of the diversion straight pipe 4 and the diversion elbow pipe 10 is better.
In some embodiments of the present invention, the powder screw 6 is connected to a pre-molding motor, and the pre-molding motor is a common three-phase motor.
To sum up, the embodiment of the utility model provides a formula powder screw 6 injection mechanism is moulded in advance of injection molding machine, it has following technological effect at least:
the utility model discloses when injecting, make telescopic link 3 drive adjusting piston 13 and slide, adjusting piston 13 can not form the jam to water conservancy diversion return bend 10 port, add the raw materials in to the premolding section of thick bamboo 5 through the second feed inlet of premolding section of thick bamboo 5, make powder screw 6 rotate, and make third heating unit 11, second heating unit 9 and first heating unit 8 heat, powder screw 6 makes the material that falls into the spiral groove impel to the discharge gate continuously, second heating unit 9 transmits the heat to the material in the spiral groove, the material is under heating and the rotatory shearing dual function of powder screw 6, reach plastify and fused purpose; the molten material enters the diversion straight pipe 4 through the discharge hole, flows into the diversion bent pipe 10, and finally flows into the injection tube 2 through the diversion bent pipe 10; when injection is to be performed, the telescopic rod 3 is adjusted, the telescopic rod 3 enables the adjusting piston 13 to achieve sealing of the diversion elbow 10, backflow of molten materials is avoided, and then the plunger rod 12 pushes the molten materials to be directionally sprayed out from the nozzle 1. In the process, when the molten material flows into the diversion elbow pipe 10 and the diversion straight pipe 4, the third heating unit 11 continuously heats the molten material, so that the condensation of the molten material in the traditional flow channel is avoided, and the matching mode of the diversion straight pipe 4, the diversion elbow pipe 10, the adjusting piston 13 and the telescopic rod 3 is adopted, so that the problem of blockage can be avoided compared with the traditional check valve.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A pre-molding type powder screw injection mechanism of an injection molding machine is characterized by comprising an injection unit, a pre-molding unit and a transition unit;
the injection unit comprises an injection tube and a plunger rod matched with the injection tube in an injection manner, the injection tube is provided with a nozzle matched with the injection tube in an injection manner, the injection tube is provided with a first feeding hole, and the injection tube is provided with a first heating unit;
the pre-molding unit comprises a pre-molding cylinder and a powder screw matched with the pre-molding cylinder in a processing manner, the pre-molding cylinder is provided with a second feeding hole and a discharging hole, the second feeding hole is formed in the discharging section of the powder screw, the discharging hole is formed in the tail end of the metering section of the powder screw, and the pre-molding cylinder is provided with a second heating unit;
the transition unit comprises a flow guide straight pipe with one sealed end, the open end of the flow guide straight pipe is communicated with a discharge hole of the pre-plastic barrel, the annular side of the flow guide straight pipe is communicated with a flow guide bent pipe, one end of the flow guide bent pipe, which is far away from the flow guide straight pipe, is communicated with a first feed hole of the injection barrel, the flow guide straight pipe is slidably provided with an adjusting piston for sealing a port of the flow guide bent pipe, the flow guide straight pipe is provided with a telescopic rod for driving the adjusting piston to slide, and the flow guide straight pipe and the flow guide bent pipe are both provided with a third heating unit.
2. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 1, wherein the first heating unit, the second heating unit and the third heating unit are all electric heating wires, the first heating unit is disposed inside the injection cylinder, the second heating unit is disposed inside the pre-molding cylinder, and the third heating unit is disposed inside the flow guide straight pipe or the flow guide bent pipe.
3. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 1, wherein the flow guide straight pipe and the pre-molding cylinder, and the flow guide bent pipe and the injection cylinder are detachably connected through bolt sets.
4. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 3, wherein gaskets are disposed between the flow guide straight pipe and the pre-molding cylinder and between the flow guide bent pipe and the injection cylinder.
5. The pre-molding powder screw injection mechanism of an injection molding machine of claim 1, wherein the telescoping rod is a hydraulic telescoping rod.
6. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 1, wherein the second feed port is provided with a tapered funnel, and a small-caliber end of the tapered funnel is butted against the second feed port.
7. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 1, wherein the guide straight pipe and the guide bent pipe are of an integrally molded structure.
8. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 7, wherein the flow guide straight pipe and the flow guide bent pipe are made of a heat insulating material.
9. The pre-molding powder screw injection mechanism of an injection molding machine according to claim 1, wherein the powder screw is connected with a pre-molding motor in a transmission manner, and the pre-molding motor is a common three-phase motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220885086.0U CN217514471U (en) | 2022-04-15 | 2022-04-15 | Pre-molding powder screw injection mechanism of injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220885086.0U CN217514471U (en) | 2022-04-15 | 2022-04-15 | Pre-molding powder screw injection mechanism of injection molding machine |
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| CN217514471U true CN217514471U (en) | 2022-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220885086.0U Active CN217514471U (en) | 2022-04-15 | 2022-04-15 | Pre-molding powder screw injection mechanism of injection molding machine |
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- 2022-04-15 CN CN202220885086.0U patent/CN217514471U/en active Active
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