CN218660271U - Hot runner mechanism capable of conveniently increasing and decreasing nozzle number - Google Patents

Abstract

A hot runner mechanism capable of conveniently increasing and decreasing the number of nozzles comprises a plurality of hot runner bodies, a stabilized voltage power supply, a plug and a power switch, and is characterized by further comprising a prompt circuit; each hot runner body is matched with a set of prompting circuit and an electric driving mechanism, the heights of the hot runner bodies are different, and each electric driving mechanism is arranged at the outer end of one side of the middle part of each hot runner body; the lower end of the shell of the hot runner body is provided with a plurality of internal thread seats, and the lower ends of the two sides of each internal thread seat are respectively provided with an upper contact piece; the upper end of each hot runner body is provided with an external thread, and the hot runner bodies and the internal thread seats are installed together; the voltage-stabilizing power supply and the power switch are arranged in the electric cabinet and are electrically connected. This is novel through threaded connection hot runner body and casing, and installation and dismantlement are all very convenient, have prevented hot runner body and the higher position mutual interference of mould upper end height, and the nozzle lower extreme that can realize corresponding hot runner body and the upper end interval of a corresponding runner of mould are suitable.

Description

Hot runner mechanism capable of conveniently increasing and decreasing nozzle number

Technical Field

The utility model relates to a corollary equipment technical field, especially a hot runner mechanism that can conveniently increase and decrease nozzle quantity moulds plastics.

Background

In the injection molding industry, a hot runner generally refers to a pipeline between heating and melting equipment (such as a screw extruder) and a casting mold, and plastic raw material fluid output by the heating and melting equipment in the previous process is ensured by a method of heating (the outer side of the hot runner is divided into two layers, an annular electric heating mechanism is arranged between the two layers, the electric heating mechanism keeps the temperature of about 200 ℃, and the power of the electric heating mechanism is about 300W, and the plastic raw material fluid enters the mold through a mold plastic raw material inlet (pouring gate) and keeps a molten state (a plurality of pouring gates can correspond to one mold and a plurality of molds), so that the fluid raw material entering the mold is uniformly dispersed, and powerful technical support is provided for ensuring the quality of a poured plastic product.

Under normal conditions, a plurality of hot runners are provided, the upper parts of the plurality of hot runners are respectively arranged at the lower end outside a shell, the upper ends of the plurality of hot runners are connected with a hollow shell in parallel, the lower end of a feed pipe is arranged outside the upper end of the shell and communicated with the shell, the upper ends of the feed pipes are connected with a discharge pipe of heating and melting equipment, the lower ends of nozzles of the plurality of hot runners are arranged at the upper parts of a plurality of mould raw material inlets, a valve rod driven by an electric driving mechanism (generally an electric driving mechanism for driving the valve rod to move by an electric push rod) is vertically arranged in each hot runner (the electric driving mechanism is arranged outside the upper end of the shell, the upper end of the valve rod is welded with a lower movable shaft of the electric driving mechanism, the valve rod enters the hot runners through the upper ends of the hot runners), during work, a worker controls the electric driving mechanism to drive the valve rod to move downwards through a power switch to close the lower ends of the inner ends of the hot runner nozzles and close fluid raw materials entering the moulds (the upper ends of the nozzles are arranged at the lower ends of the hot runners and the lower middle parts of the hot runners and have a fluid hole), or the lower ends of the hot runner nozzles are opened to control fluid to enter the moulds (the next work, the lower ends of the hot runner and the hot runner can melt the raw materials remained in the moulds normally. The existing hot runners are limited by the structure, the number of the hot runners is fixed, and the upper ends of a plurality of hot runners are fixedly connected with the lower end of a shell, so that when the upper end of a mold has different appearances and different heights, one or more hot runners with the same height at the lower end can interfere with the higher part of the upper end of the mold, namely, a nozzle at the lower end of one or more corresponding hot runners cannot align with one or more mold gates with relatively lower height, when the spacing distance between the lower end of the nozzle and the upper end of the gate is larger, the subsequent fluid raw materials flowing out through the nozzle are easily influenced by surrounding air flow and cannot vertically and effectively enter the gate, and escape out of the gate to bring adverse effects to the casting work of the mold, correspondingly, because the spacing is larger, the fluid raw materials are also easily influenced by cold air and have poor flowability, and further bring adverse effects to the subsequent product quality. In summary, it is necessary to provide a hot runner mechanism which can increase or decrease the number of hot runners conveniently and prevent the gap between the mold gate and the lower end of the nozzle from being too large.

SUMMERY OF THE UTILITY MODEL

In order to overcome current hot runner because of the structure limit exists as the background drawback, the utility model provides a based on many hot runner bodies, many hot runner bodies highly differ, through threaded connection between hot runner body and the casing, can conveniently increase and decrease the casing lower extreme and have not co-altitude hot runner body only, the high position mutual interference in hot runner body and mould upper end height has been prevented, the upper end interval that can realize the nozzle lower extreme of corresponding one or more hot runner bodies and the corresponding one or more runner of mould is suitable, the hot runner mechanism that can conveniently increase and decrease nozzle quantity has been played the product quality after guaranteeing the mould pouring.

The utility model provides a technical scheme that its technical problem adopted is:

a hot runner mechanism capable of conveniently increasing and decreasing the number of nozzles comprises a plurality of hot runner bodies, a stabilized voltage power supply, a plug and a power switch, and is characterized by further comprising a prompt circuit; the electric driving mechanism and the plug of the prompting circuit and the hot runner body are respectively provided with a plurality of sets, each hot runner body is matched with one set of prompting circuit and electric driving mechanism, the heights of each hot runner body are different, each electric driving mechanism is transversely arranged at the outer end of one side of the middle part of each hot runner body, and a valve core of each electric driving mechanism is positioned in the hot runner body; the lower end of the shell of the hot runner body is provided with a plurality of internal thread seats at intervals, and the lower parts of the two side ends of each internal thread seat are respectively provided with an upper contact piece in an insulated manner; the upper end of each hot runner body is provided with an external thread, and each hot runner body and each internal thread seat are installed together through threads; the power supply and the power switch are arranged in the electric cabinet, and the plurality of prompting circuits are respectively arranged at the outer side ends of the plurality of hot runner bodies; the power output end of the stabilized voltage power supply is electrically connected with the upper contact pieces of the internal thread seats, and the power output ends of the power switches are respectively electrically connected with the power input ends of the electric driving mechanisms.

Further, the outer diameter of the upper part of the hot runner body is consistent with the outer diameter of the internal thread seat.

Furthermore, the two sides of the upper end of each hot runner body are respectively provided with a lower contact piece in an insulating way, and the two lower contact pieces are electrically connected with the power supply input end of the electric heating mechanism of the hot runner body.

Further, each set of prompting circuit comprises a resistor, a light emitting diode, NPN triodes, a buzzer and a capacitor which are electrically connected, a first lower contact piece is connected with one end of the first resistor, one end of a second resistor, one end of a third resistor and the positive power input end of the buzzer, two NPN triode emitting electrodes, a negative electrode of the capacitor and the negative power input end of the light emitting diode are connected with a second lower contact piece, the other end of the first resistor is connected with the positive electrode of the light emitting diode, the other end of the second resistor is connected with the positive electrode of the capacitor and one end of a fourth resistor, the other end of the fourth resistor is connected with the base electrode of the first NPN triode, an NPN collector electrode of the first NPN triode is connected with one end of the third resistor and the base electrode of the second NPN triode, and a collector electrode of the second NPN triode is connected with the negative power input end of the buzzer.

Further, the electric driving mechanism is a reciprocating electric telescopic rod.

The utility model has the advantages that: this is novel based on hot runner body, and the user chooses for use as required to connect between the hot runner body and the casing lower extreme of different length and difference number in the application, because this is novel through threaded connection hot runner body and casing, installs and dismantles all very conveniently. This is novel in, indicating circuit can pass through reputation suggestion user after hot runner body installation targets in place, has guaranteed this internal electric heating mechanism of hot runner like this and has reached the electricity and keep warm for fluid heating. This is novel has prevented high position mutual interference in hot runner body and mould upper end, can realize that the nozzle lower extreme of corresponding one or more hot runner body and the upper end interval of the corresponding one or more runner of mould are suitable, has played favourable technical support for guaranteeing mould pouring back product quality. Based on the above, so this novel application prospect that has.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of the overall structure and a partially enlarged structure of the present invention;

fig. 2 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, a hot runner mechanism capable of conveniently increasing or decreasing the number of nozzles comprises a plurality of hot runner bodies 1 (an annular hollow electric heating mechanism 2 is installed between an outer layer and an inner layer of the outer layer, a PTC constant temperature electric heating plate finished product is adopted, the power is about 300W, the working voltage direct current is 12V), a voltage stabilizing power supply A1, a shell 3, a feeding pipe 4, an electric driving mechanism (in this embodiment, an electric driving mechanism 7 for driving a valve rod to move by an electric push rod is adopted, and a movable rod of the electric push rod is provided with a cylindrical valve core), a plug 5, a power switch SN and a prompting circuit 6 are matched with the plurality of hot runner bodies 1; the prompting circuit 6, the electric driving mechanism 7, the plug 5 and the power switch SN are respectively provided with a plurality of sets, each hot runner body 1 is matched with one set of prompting circuit 6, the electric driving mechanism 7, the plug 5 and the power switch SN, the heights of each hot runner body 1 are different, a cylindrical channel tube 8 which is hermetically isolated from the inner layer and the outer layer of the outer side of the hot runner body is arranged in the lower part of each hot runner body 1, a cylindrical fluid channel 9 which is communicated with the channel tube is arranged in the middle of the upper end and the lower end of the channel tube 8, an electric push rod M cylinder of each electric driving mechanism is transversely installed at the left outer end of the channel tube 8 through a screw nut, and a cylindrical valve core 71 which is connected with an electric push rod is positioned between the upper end and the lower end of the three-dimensional channel 9 to seal the fluid channel; a plurality of internal thread seats 31 communicated with the shell are welded at a certain distance at the lower end of the shell 3, the middle parts of the two side ends of each internal thread seat 31 are respectively provided with an upper concave mounting groove 32 (the upper mounting groove 32 is isolated from the shell 3), each upper mounting groove 32 is matched with an electric contact mechanism, each electric contact mechanism comprises a ceramic insulating seat 101 with a hole in the middle and a circular contact upper copper sheet T1, the upper end of the middle part of the upper copper sheet T1 is vertically welded with a screw, the middle part of the ceramic insulating seat 101 is provided with a hole, the screw is led out upwards through the holes of the ceramic insulating seat 101 and is fixed by a nut to mount the upper copper sheet T1 at the lower end of the ceramic insulating seat 101 (the nut is positioned on the ceramic insulating seat 101), the ceramic insulating seat 101 is tightly sleeved at the upper end in the upper mounting groove 32, the upper ends of the screw rods in the two upper mounting grooves 32 at the side ends of each screw are respectively connected with a lead, the lead is led out through the holes in the middle parts of the lower ends of the two sides of the internal thread seats 31, and a plurality of the lead is sleeved with a plurality of insulating ceramic tubes; a screw tube 11 with an external thread is vertically welded in the middle of the upper end of each hot runner body 1, and each hot runner body is screwed into the internal thread of each internal thread seat 31 through the external thread of the screw tube 11 and the external thread of the upper end of a plurality of plugs 5 and is installed at the lower end of the shell 3; the stabilized voltage power supply A1 and the power switch SN are installed on a circuit board in the electric cabinet 12, and the plurality of prompting circuits 6 are respectively installed on the outer portions of the left side ends of the plurality of hot runner bodies 1.

As shown in fig. 1 and 2, the left end of the channel tube 8 is an open structure, the right end is a sealed structure, the space between the inner side of the channel tube 8 and the outer side of the valve core 71 is just in a sealed and rotatable state, when the movable rod of the electric push rod M drives the valve core 71 to move leftwards to a dead point, the upper end and the lower end of the fluid channel 9 are communicated, and when the movable rod of the electric push rod M drives the valve core 71 to move rightwards to the dead point, the upper end and the lower end of the fluid channel 9 are closed by the valve core 71. The outer diameter of the hot runner body 1 is identical to the outer diameter of the female screw seat 31. The lower end of an upper copper sheet T1 is positioned at a certain height (1 mm) outside the lower end of an upper mounting groove 32, the middle parts of two sides of the upper end of each hot runner body 1 are respectively provided with a concave lower mounting groove 13, a round U-shaped structure and a supporting ceramic seat 14 with the same height as the upper end of the lower mounting groove are tightly sleeved in each lower mounting groove 13, the inner upper end of the supporting ceramic seat 14 is tightly sleeved with a contact lower copper sheet T2 with the same height as the upper end of the ceramic seat, wires connected with the lower copper sheets T2 are respectively sleeved at the outer side ends of a plurality of sections of ceramic insulating tubes (the wires are led out from two outer sides of the outer layer at the upper end of the hot runner body 1), when a screwed pipe 11 of each hot runner body rotates to a stop point along an internal thread of an internal thread seat 31, the upper ends of the two lower copper sheets T2 and the lower ends of the two upper copper sheets T1 are respectively contacted and electrically conducted (the two power supply input ends of the two lower copper sheets and the electric heating mechanism are respectively connected). The outer diameter of the upper copper sheet T1 is 1 mm smaller than the inner diameter of the upper mounting groove 32, and the outer diameter of the lower copper sheet T2 is 1 mm smaller than the outer diameter of the lower mounting groove 13. The upper end of each plug 5 is provided with an annular concave fixing groove, a ceramic annular hollow insulating seat 51 (for preventing two upper copper sheets T1 from being short-circuited) is tightly sleeved in the fixing groove, and the height of the ceramic annular hollow insulating seat 51 is higher than that of the fixing groove. Each set of prompting circuit comprises resistors R1, R2, R3 and R4 which are arranged in an element box and connected through circuit board wiring, a light-emitting diode VL, NPN triodes Q1 and Q2, a buzzer B, a capacitor C1, a first lower copper sheet T2, one end of the first resistor R1, one end of the second resistor R2, one end of the third resistor R4 and an anode power supply input end of the buzzer B, two NPN triodes Q and Q2 emitting electrodes, a cathode of the capacitor C1 and a cathode power supply input end of the light-emitting diode VL are connected with the second lower copper sheet T2, the other end of the first resistor R1 is connected with an anode of the light-emitting diode VL, the other end of the second resistor R2 is connected with the positive electrode of the capacitor C1, one end of the fourth resistor R3 is connected, the other end of the fourth resistor R3 is connected with the base electrode of the first NPN triode Q1, the collector electrode of the first NPN triode Q1 is connected with one end of the third resistor R4, the base electrode of the second NPN triode Q2 is connected, the collector electrode of the second NPN triode Q2 is connected with the power input end of the negative electrode of the buzzer B (the light emitting surface of the light emitting diode VL is positioned outside the opening at the left end of the component box), a plurality of fixing screws are welded on the left outer side of the upper end of the hot runner body, and the component box 15 is mounted together with the component box 15 and the left side end of the hot runner body 1 through nuts and the fixing screws at intervals. The stabilized voltage supply A1 is a finished product of a 220V/212V/5KW AC-to-DC 12V switching power supply module; the electric push rod M is a reciprocating electric telescopic rod. The power input ends 1 and 2 of a stabilized voltage power supply A1 are respectively connected with the two poles of an alternating current 220V power supply through leads, the power output ends 3 and 4 of the stabilized voltage power supply A1 and the electric contact structures at the two side ends of a plurality of mounting grooves are respectively connected with the two upper copper sheets T1 and the two power input ends 1 and 2 of a plurality of power switches SN through leads, and the power output ends 3, 4 pins and 5, 6 pins of the plurality of power switches SN are respectively connected with the positive and negative and positive pole power input ends of a plurality of sets of electric push rods M through leads.

As shown in fig. 1 and 2, after the main power switch is turned on and the regulated power supply A1 inputs ac, the pins 3 and 4 of the regulated power supply A1 output stable dc 12V power to the power input terminals 1 and 2 of the plurality of power switches SN and to the plurality of sets of two upper copper sheets T1. The novel hot runner body 1 is based on, the using method of the novel hot runner body 1 is completely consistent with that of the existing hot runner, fluid raw materials flowing out of heating and melting equipment (such as a screw extruder) enter a plurality of hot runner bodies 1 through a feeding pipe 4 and a shell 3 during working, then enter a plurality of pouring molds through a plurality of nozzles at the lower ends of the plurality of hot runner bodies 1 through a plurality of pouring gates of the molds, and the plurality of hot runner bodies 1 ensure that raw material fluid output by the heating and melting equipment in the previous process is kept in a molten state before entering the molds through a mold plastic raw material inlet (pouring gate) by using an electric heating method (the electric heating mechanism 2 heats the fluid flowing through the inside after being electrified), so that the fluid raw materials entering the molds are uniformly dispersed, and powerful technical support is provided for ensuring the quality of cast plastic products; in practical situations, if a worker dials a corresponding power switch SN left or right, such that pins 1, 2, 3, 4, 5, and 6 of the corresponding power switch SN are respectively communicated, the positive and negative or positive poles of a corresponding set of electric push rod M are energized, and the movable rod of the electric push rod M of the corresponding set of electric drive mechanism drives the valve element 71 to move left to a stop point after the positive and negative poles of the electric push rod M are energized, the upper end and the lower end of the fluid channel 9 are communicated with each other, such that fluid raw materials can enter the mold, and when the movable rod drives the valve element 71 to move right to the stop point after the negative and positive poles of the electric push rod M of the corresponding set of electric drive mechanism are energized, the upper end and the lower end of the fluid channel 9 are closed by the valve element 71, such that the fluid raw materials do not enter the mold any more. Before use, workers select hot runner bodies 1 with different lengths and different numbers to be connected with the lower end of the shell according to needs, the upper end of each hot runner body 1 is connected with an internal thread seat 31 at the lower end of the shell through a solenoid 11, and the position where the hot runner bodies 1 are not installed is screwed into the internal thread seat at the lower end of the shell through an external thread at the upper end by a plug to seal the internal thread seat; when the screw tube of a corresponding hot runner body 1 rotates to a dead point along the internal thread of the internal thread seat 31, the upper ends of the two lower copper sheets T2 and the lower ends of the two upper copper sheets T1 are respectively contacted and electrically conducted, so that the electric heating mechanism in each hot runner body 1 can be electrically operated to generate heat. In this is novel, a corresponding hot runner body installs behind a corresponding internal thread seat 31 lower extreme, if do not have the rotatory installation to target in place, then copper sheet T2 under two and two go up copper sheet T1 between the interval distance nonconducting, corresponding one set of suggestion circuit also can not be with electric work. When the corresponding hot runner body is installed in place and the two lower copper sheets T2 and the two upper copper sheets T1 are respectively communicated, the prompt circuit can be electrified to work. After the prompting circuit works when power is on, a 12V power supply enters the input end of the positive power supply of the light emitting diode VL through the voltage reduction and current limitation of the resistor R1, then the light emitting diode VL is powered to emit light, meanwhile, the 12V power supply is charged for the capacitor C1 through the voltage reduction and current limitation of the resistor R2, at the beginning time (such as 5 seconds), when the capacitor C1 is not fully charged, the base voltage of the NPN triode Q1 is lower than 0.7V, the collector electrode of the NPN triode Q1 cannot output low level to enter the base electrode of the NPN triode Q2, the base electrode of the NPN triode Q2 obtains proper forward bias voltage conduction from the positive electrode of the 12V power supply through the voltage reduction and current limitation of the resistor R4, the collector electrode outputs low level to enter the input end of the negative power supply of the buzzer B, and then the buzzer B is powered to sound. After the capacitor C1 is fully charged after charging for a period of time, a 12V power supply is subjected to voltage reduction and current limitation through the resistors R2 and R3, enters the base electrode voltage of the NPN triode Q1 which is higher than 0.7V, is higher than 0.7V, is conducted, the collector electrode of the NPN triode Q1 is output, is in low level and enters the base electrode of the NPN triode Q2, the base electrode of the NPN triode Q2 is not properly biased forward and is cut off, and then the buzzer B cannot be electrified and sounded. Through the above, after a corresponding hot runner body 1 is installed in place, the buzzer B can sound and the light emitting diode VL together prompt the worker to install the hot runner body in place, otherwise, the worker needs to continue rotating the hot runner body 1 until the prompt circuit gives out an audible and visual prompt (the buzzer B only gives out sound for 5 seconds, and unnecessary interference brought to the worker by long-time sound production can be prevented). Under above-mentioned all mechanisms and circuit combined action, this is novel through threaded connection hot runner body and casing, and installation and dismantlement are all very convenient, have guaranteed that this internal electric heating mechanism of hot runner has got the electricity and has kept warm for the fluid heating, have prevented hot runner body and mould upper end high position mutual interference, can realize that the nozzle lower extreme of corresponding one or more hot runner bodies and the upper end interval of the corresponding one or more runner of mould are suitable, have played favourable technical support for guaranteeing mould pouring back product quality. In fig. 2, the electric push rod M is a reciprocating electric telescopic rod finished product, the power is 20W, and the working voltage is direct current 12V; the type of the capacitor C1 is 1 mu F/25V; the resistances of the resistors R1, R2, R3 and R4 are respectively 4.2K, 2.7M, 470K and 100K; the buzzer B is an active continuous sound buzzer alarm finished product with the model SF 12V; the light emitting diode VL is a red light emitting diode; the model of the NPN triodes Q1 and Q2 is 9013.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims (5)

1. A hot runner mechanism capable of conveniently increasing and decreasing the number of nozzles comprises a plurality of hot runner bodies, a stabilized voltage power supply, a plug and a power switch, and is characterized by further comprising a prompt circuit; the electric driving mechanism and the plug of the prompting circuit and the hot runner body are respectively provided with a plurality of sets, each hot runner body is matched with one set of prompting circuit and electric driving mechanism, the heights of each hot runner body are different, each electric driving mechanism is transversely arranged at the outer end of one side of the middle part of each hot runner body, and a valve core of each electric driving mechanism is positioned in the hot runner body; the lower end of the shell of the hot runner body is provided with a plurality of internal thread seats at intervals, and the lower parts of the two side ends of each internal thread seat are respectively provided with an upper contact piece in an insulated manner; the upper end of each hot runner body is provided with an external thread, and each hot runner body and each internal thread seat are installed together through threads; the power supply and the power switch are arranged in the electric cabinet, and the plurality of prompting circuits are respectively arranged at the outer side ends of the plurality of hot runner bodies; the power output end of the stabilized voltage power supply is electrically connected with the upper contact pieces of the internal thread seats, and the power output ends of the power switches are respectively electrically connected with the power input ends of the electric driving mechanisms.

2. The hot runner mechanism capable of increasing or decreasing the number of nozzles conveniently as claimed in claim 1, wherein an outer diameter of an upper portion of the hot runner body is identical to an outer diameter of the female screw holder.

3. The hot runner mechanism of claim 1, wherein two sides of the upper end of each hot runner body are respectively provided with a lower contact piece in an insulated manner, and the two lower contact pieces are electrically connected with the power input end of the electric heating mechanism of the hot runner body.

4. The hot runner mechanism as claimed in claim 3, wherein each prompting circuit comprises a resistor, a light emitting diode, an NPN transistor, a buzzer and a capacitor, the first lower contact piece is connected with one end of the first resistor, one end of the second resistor, one end of the third resistor and a positive power input end of the buzzer, the emitters of the two NPN transistors, the cathode of the capacitor and the negative power input end of the light emitting diode are connected with the second lower contact piece, the other end of the first resistor is connected with the anode of the light emitting diode, the other end of the second resistor is connected with the anode of the capacitor and one end of the fourth resistor, the other end of the fourth resistor is connected with the base of the first NPN transistor, the collector of the first NPN transistor is connected with one end of the third resistor and the base of the second NPN transistor, and the collector of the second NPN transistor is connected with the negative power input end of the buzzer.

5. The hot runner mechanism of claim 1, wherein the electric drive mechanism is a reciprocating electric telescopic rod.

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