CN218111571U

CN218111571U - Hot runner device with adjustable nozzle height

Info

Publication number: CN218111571U
Application number: CN202221759366.3U
Authority: CN
Inventors: 钟文昆; 王文英
Original assignee: Shanghai Morui Electromechanical Equipment Co ltd
Current assignee: Shanghai Morui Electromechanical Equipment Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-12-23
Anticipated expiration: 2032-07-08

Abstract

A hot runner device with adjustable nozzle height comprises a plurality of hot runner bodies, a stabilized voltage power supply, a power supply switch, an electric push rod, a relay, a temperature switch, a sleeve, a temperature detection circuit and a detection mechanism; the upper end of the nozzle of each hot runner body is arranged at the lower end of a sleeve, and the upper end of the sleeve is sleeved outside the hot runner body; the upper end of the electric push rod is arranged on one side of the upper end of the hot runner body, and the lower end of the electric push rod is arranged with one side of the sleeve; the detection mechanism comprises an insulating seat and a conducting strip, the conducting strip is arranged at the lower end of the insulating seat, and the insulating seat is arranged on one side of the lower end of the sleeve; relay and constant voltage power supply, switch, temperature detection circuit install and electric connection in the electric cabinet, and temperature switch installs in the sleeve pipe outside. This novel raw materials import that can make nozzle lower extreme and mould when the mould height changes contacts, has realized intelligent control, has played favourable technical support in order to guarantee that the fluid gets into the mould.

Description

Hot runner device with adjustable nozzle height

Technical Field

The utility model relates to a corollary equipment technical field, especially a hot runner device of adjustable nozzle height 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 to be kept in a molten state before entering the mold through a mold plastic raw material inlet (pouring gate) by a method of heating (the outer side of the hot runner is divided into two layers, a hollow annular electric heating mechanism is arranged between the two layers, and the electric heating mechanism keeps the temperature of more than 200 degrees), so that the fluid raw material entering the mold is uniformly dispersed, and powerful technical support is provided for ensuring the quality of a cast plastic product.

Generally, a plurality of hot runners are arranged in a shell, a discharge port is arranged at the lower end outside the shell, the upper ends of a plurality of hot material channels are connected with a feed pipe outside the upper end of the shell in parallel through a communicating pipe (an electric heating mechanism is arranged between an outer layer and an inner layer of the outer side), the upper end of the feed pipe is connected with a discharge pipe of heating and melting equipment together, the lower ends of nozzles of the plurality of hot runners are movably connected with raw material inlets at the upper ends of a plurality of dies, a valve rod driven by an electric driving mechanism (such as an electric driving mechanism based on 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 rod of the electric driving mechanism, the valve rod enters the hot runner through the upper end of the hot runner), and 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 nozzles of the hot runners and close fluid raw materials entering the dies (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 have a fluid hole), or opens the lower ends of the nozzles of the hot runners to control fluid to enter the dies. The existing hot runner nozzle is in a fixed structure, in practical application, the distance between the lower end of the existing hot runner nozzle and a raw material inlet of a mold is fixed, when the size and the height of the mold change, when the distance between the raw material inlet of the mold and the lower end of the nozzle is too small, the nozzle and the raw material inlet cannot be combined, fluid raw materials output by the nozzle cannot enter the mold, when the distance between the raw material inlet of the mold and the lower end of the nozzle is too large, the fluid raw materials flowing into the nozzle from the lower end of the nozzle and the upper end of the raw material inlet can be caused to flow out, the fluid raw materials can not effectively enter the raw material inlet easily affected by the surrounding environment (such as flowing air), and various impurities in the air can enter the mold easily, and adverse effects are brought to the product quality. Finally, the existing hot runners have no effective temperature control monitoring device, so that when one or more electric heating mechanisms in the hot runner fails, the temperature of the hot runner with the problem cannot be guaranteed, the fluid raw materials entering the mold cannot be effectively in a molten state, and the product quality is also adversely affected. In summary, it is necessary to provide a hot runner apparatus capable of conveniently realizing height change of a nozzle and effectively monitoring temperature.

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 the hot runner body, under relevant mechanism and circuit combined action in using, can conveniently change the height of nozzle, and can the temperature of many hot runner bodies of real-time supervision, can in time indicate the staff to deal with according to particular case when the temperature is unusual, played a hot runner device of adjustable nozzle height that favourable technique supported for guaranteeing injection moulding product quality from this.

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

a hot runner device with adjustable nozzle height comprises a plurality of hot runner bodies, a stabilized voltage power supply, a power switch, an electric push rod, a relay, a temperature switch and a sleeve, and is characterized by also comprising a temperature detection circuit and a detection mechanism; the upper end of the nozzle of each hot runner body is arranged at the lower end of a sleeve, and the upper end of the sleeve is sleeved outside the hot runner body; the upper end of the electric push rod is arranged on one side of the upper end of the hot runner body, and the lower end of the electric push rod and one side of the sleeve are arranged together; the detection mechanism comprises an insulating seat and a conducting strip, the conducting strip is arranged at the lower end of the insulating seat, and the insulating seat is arranged on one side of the lower end of the sleeve; the relay, the voltage-stabilizing power supply, the power switch and the temperature detection circuit are arranged in the electric cabinet, and the temperature switch is arranged outside the sleeve; one end of the temperature switch is electrically connected with the signal input end of the temperature detection circuit, the first path and the second path of power output ends of the power switch are respectively electrically connected with the power input end of the electric push rod and the power input end of the relay, and the normally closed contact end of the relay is electrically connected with the other power input end of the electric push rod.

Further, the temperature switch is a kick type normally closed contact temperature switch.

Further, the electric push rod is a reciprocating electric telescopic rod.

Furthermore, the temperature detection circuit comprises a buzzer, a resistor, an NPN triode and a capacitor which are electrically connected, wherein a collector of the NPN triode is connected with a negative power input end of the buzzer, one end of the first resistor is connected with one end of the second resistor and a positive electrode of the capacitor, the other end of the second resistor is connected with a base electrode of the NPN triode, and an emitter of the NPN triode is connected with a negative electrode of the capacitor.

The utility model has the advantages that: this is novel based on the hot runner body, under relevant mechanism and circuit combined action in the application, can control electric putter through adjusting switch and drive the sleeve pipe and rise or descend the height, can make the raw materials import contact of nozzle lower extreme and mould when the mould height changes, in the actual operation, can automatic control nozzle stop motion after nozzle lower extreme and mould feed inlet upper end contact, intelligent control has been realized, and effectively guaranteed the effective combination of nozzle lower extreme and mould feed inlet upper end (the nozzle is whole to get into in the mould, the sleeve pipe lower extreme is located mould feed inlet upper end), played favourable technical support in guaranteeing that the fluid gets into the mould. In this is novel, can in time indicate the staff through buzzer sound production when the heating mechanism of one or more hot runner body goes wrong, the temperature reduces wherein, and like this, the staff can deal with according to particular case, has guaranteed injection moulding product production quality from this. 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 device capable of adjusting the height of a nozzle comprises a plurality of hot runner bodies 1, a stabilized voltage power supply A1, a power switch SN, an electric push rod MN, a relay KN and a temperature switch WN; the upper ends of a plurality of hot runner bodies 1 are arranged in a shell 2, the lower ends of the hot runner bodies 1 are positioned at the lower end outside the shell 2, the upper ends of the plurality of hot runner bodies 1 are connected in parallel with the lower part of a feed pipe 4 outside the upper end of the shell 2 through a communicating pipe 3, the upper ends of the feed pipes 3 are connected with a discharge pipe of heating and melting equipment, an electric drive 5 or a hydraulically driven valve rod 6 is vertically arranged in each hot runner body, and when the valve rod 6 is controlled by relevant equipment (a power switch) to move downwards during work, a lower end fluid hole 71 of a hot runner body nozzle 7 is closed to feed fluid raw materials into a mold, or the lower end of the hot runner nozzle is opened to control fluid to feed into the mold; also has a temperature detection circuit 8 and a detection mechanism; the upper end of a nozzle 7 of each hot runner body is welded at the lower end of a hollow sleeve 9, the lower middle part of the nozzle 7 is provided with a fluid hole 71, the outer side of the sleeve 9 is of an inner-outer layer hollow structure, the upper end of the sleeve 9 is sleeved at the outer side of the lower end of the hot runner body 1, and the inner end of the inner layer of the sleeve 9 and the outer side of the hot runner body 1 are in a close contact movable state; the outer side of the hot runner body 1 is of a hollow structure with an inner layer and an outer layer, an annular PTC ceramic electric heating plate RTN is arranged between the inner layer and the outer layer of the outer side of the hot runner body 1, leads connected with the electric heating plate RTN are respectively sleeved on the outer sides of a plurality of sections of ceramic insulating pipes, and the leads are led out outwards through the upper part of the right end of the hot runner body 1; the electric push rod MN is provided with a plurality of sets, a temperature switch WN, a power switch SN, a relay KN, a detection mechanism and a temperature detection circuit 8 which are respectively provided with a plurality of paths, the electric push rod MN, the temperature switch WN, the power switch SN, the relay KN, the detection mechanism, the temperature detection circuit and the hot runner bodies 1 are consistent in quantity, each hot runner body 1 is matched with one set of electric push rod MN, one temperature switch WN, the power switch SN, the relay KN, the detection mechanism and the temperature detection circuit, the upper end of a cylinder body of each set of electric push rod MN is vertically distributed and installed on the left side outside the upper end of the hot runner body 1 through a screw nut, and the lower end of a movable rod of each set of electric push rod MN is welded with the middle part of the left outer side of each hot runner sleeve 9; the middle of the right lower end of the sleeve 9 of each hot runner body 1 is provided with an opening 91, the detection mechanism comprises a circular ceramic seat 11 and a circular contact copper sheet JN, the middle of the upper end of the copper sheet JN is welded with a screw rod, the screw rod is led out upwards through the opening in the middle of the ceramic seat 11 and is fixed by a nut, the outer side of the ceramic seat 11 of each detection mechanism is tightly sleeved on the inner side of each opening 91, the lower end of the copper sheet and the lower end of the sleeve 9 are positioned on the same plane, conducting wires connected with the screw rod are respectively sleeved on the outer sides of a plurality of sections of ceramic insulating tubes, and the conducting wires are led out outwards through the lower part of the right end of the sleeve 9; the plurality of relays KN, the voltage-stabilized power supply A1, the plurality of power switches SN and the temperature detection circuit 8 are arranged on the circuit board in the electric cabinet 12, and the plurality of temperature switches WN are respectively arranged in the middle of the outer side of the right end of the sleeve of the plurality of hot runner bodies 1 through screw and nut fixing clamps and the like.

As shown in fig. 1 and 2, the temperature switch WN is a kick type normally closed contact temperature switch; the electric heating plate RTN is a PTC constant temperature ceramic electric heating plate with working voltage of 220V and power of 300W, and the heating temperature is 260 ℃. The electric push rod MN is a finished product of a reciprocating electric telescopic rod, the power switch SN is provided with two power input ends 1 and 2 pins, two

power output ends

3 and 4 pins, 5 and 6 pins and a toggle power switch, and handles of a plurality of power switches SN are positioned outside a plurality of holes at the front end of the electric cabinet; the lower end of a copper sheet JN of each detection mechanism and the lower end of the sleeve are positioned on the same plane; the stabilized voltage supply U1 is a finished product of a 220V/12V/1KW type switching power supply module converting alternating current 220V into direct current 12V. The temperature detection circuit comprises a buzzer B, resistors R1 and R2, an NPN triode Q1 and a capacitor C1 which are connected through circuit board wiring, wherein a collector of the NPN triode Q1 is connected with a negative power input end of the buzzer B, one end of the first resistor R1 is connected with one end of the second resistor R2 and a positive electrode of the capacitor C1, the other end of the second resistor R2 is connected with a base electrode of the NPN triode Q1, and an emitting electrode of the NPN triode Q1 is connected with a negative electrode of the capacitor C1.

As shown in fig. 1 and 2, power input terminals 1 and 2 of a regulated power supply U1 and two poles of an alternating current 220V power supply are respectively connected through a wire, a positive power output terminal 3 pin of the regulated power supply U1 and a positive power input terminal 1 pin of a power switch SN, a housing T of a mold, one end of a temperature switch WN, the other end of a positive power input terminal resistor R1 of the temperature detection circuit is respectively connected through a wire, a negative power output terminal 4 pin of the regulated power supply U1 and a negative power input terminal 2 pin of the power switch SN, a negative power input terminal of a relay KN, a negative power input terminal capacitor C1 of the temperature detection circuit are respectively connected through a wire, the other end of the temperature switch WN and a positive power input terminal buzzer B of the temperature detection circuit are connected through a wire, negative and positive

power output terminals

3 and 4 pin of the power switch SN and a negative and positive power input terminal of an electric push rod MN are respectively connected through a wire, positive and negative power output terminals 5 and 6 pin of the power output terminal of the power switch SN and a positive power input terminal of the relay KN are respectively connected through a wire, a negative power input terminal KN and a positive power input terminal of the relay KN are respectively connected through a wire.

Fig. 1 and 2 show that the novel hot runner body is based on the hot runner body, 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 a heating and melting device (such as a screw extruder) enter a plurality of hot runner bodies 1 through a communicating pipe 3 and a feeding pipe 4 during work, then enter a plurality of casting molds through the lower ends of the plurality of hot runner bodies 1, and the plurality of hot runner bodies 1 ensure that raw material fluid output by the heating and melting device in the previous process is kept in a molten state before entering the molds through a mold plastic raw material inlet (sprue) by a heating method (heating the fluid flowing through the inside after an electric heating plate RTN is electrified), so that the fluid raw materials entering the molds are uniformly dispersed, and powerful technical support is provided for ensuring the quality of the plastic products after casting; in practical situations, when the power switch controls the valve rod 6 to move downwards, a worker closes the lower end in the hot runner body 1, closes the fluid raw material entering the mold, or controls the valve rod 6 to move upwards to open the amount of liquid fluid entering the mold. After the main power switch is turned on, and the 220V power enters the power input end of the stabilized voltage power supply A1, the

pins

3 and 4 of the stabilized voltage power supply A1 can output stable direct current 12V power to enter the temperature detection circuit, the power input ends of the power switches SN and one end of the temperature switches WN. When the height between the lower end of the nozzle of one or more corresponding hot runner bodies 1 and one or more raw material inlets at the upper end of the die is too low or too high and needs to be adjusted, a worker shifts the handle of one or more power switches SN leftwards or rightwards, so that the 1 and 2 feet and the 3 and 4 feet or the 5 and 6 feet of one or more power switches SN are respectively communicated, and thus the negative and positive poles or the positive and negative poles of one or more sets of electric push rods MN can be electrified. After the negative and positive electricity of one or more sets of electric push rods MN is obtained, the movable rods can drive one or more sleeves 9 to move upwards, the space between the movable rods and one or more raw material inlets at the upper end of the mold is separated, and the power switch SN is turned off after the movable rods are in place, so that the proper space between the lower end of the nozzle of one or more hot runner bodies 1 and one or more raw material inlets at the upper end of the mold can be ensured. After the positive and negative of one or more sets of electric push rods MN are electrified, the movable rods thereof can drive one or more sleeves 9 to move downwards and gradually approach to one or more raw material inlets at the upper end of the die; in practical situations, when the sleeve 9 descends, if the lower end of the sleeve is not effectively contacted with the upper end of the die, the relay KN can continue to lose power, the positive power supply output by the 5 pins of the power switch SN continues to enter the positive power supply input end of the electric push rod MN through the relay KN control power supply input end and the normally closed contact end, and the electric push rod MN continues to push the sleeve 9 to descend; when the sleeve 9 moves downwards, if the lower end of the sleeve is effectively contacted with the upper end of the die, the anode of a 12V power supply enters the anode power supply input end of the relay KN through the shell of the metal die T and the contact copper sheet JN, so that a corresponding relay KN can be electrified to attract the control power supply input end and the normally closed contact end of the relay KN to be open, and a corresponding set of electric push rods MN can lose electricity and do not work any more; through the above, among this novel actual operation, can automatic control nozzle stop motion after nozzle lower extreme and mould feed inlet upper end contact, realized intelligent control, and effectively guaranteed effective combination (the nozzle is whole to get into the mould, and the sleeve pipe lower extreme is located mould feed inlet upper end) of nozzle lower extreme and mould feed inlet upper end, played favourable technical support in order to guarantee that the fluid gets into the mould.

As shown in fig. 1 and 2, after the temperature detection circuit works by being electrified, the 12V power supply can be subjected to voltage reduction and current limitation through the resistor R1 to charge the capacitor C1, when the capacitor C1 is not fully charged in a period of time at the beginning, the 12V power supply enters the NPN triode Q1 through the resistor R1 and the resistor R2 by being subjected to voltage reduction and current limitation, the base voltage of the NPN triode Q1 is lower than 0.7v, and the NPN triode Q1 is in a cut-off state, so that the negative electrode of the buzzer B cannot be electrified, and the buzzer B cannot sound even if the temperature of the hot runner body is insufficient. After the capacitor C1 is fully charged after charging for a period of time (for example, 2 minutes), the 12V power supply is subjected to voltage reduction and current limiting through the resistors R1 and R2, the base voltage of the NPN triode Q1 is higher than 0.7V, and the NPN triode Q1 is in a conducting state, so that the cathode of the buzzer B can be electrified, and the buzzer B can be electrified to sound when the temperature of the hot runner body is insufficient. In practical situations, when the temperature of any temperature switch WN installed at the outer end of the hot runner body 1 is normally higher than a certain temperature (for example, higher than 200 ℃), two normally closed contacts inside the temperature switch WN are opened, and the buzzer B cannot be electrified to sound; when any one hot runner body 1 inside electric heating plate goes wrong and no longer generates heat, install the temperature switch WN in covering hot runner body 1 outside because the temperature that detects is less than 200 ℃, its inside contact can be closed, like this, the 12V power positive pole can get into the anodal power input end of buzzer B, then, buzzer B can get electric sound production suggestion staff and have hot runner body 1 heating heat preservation unusual, in time overhaul, the staff can deal with according to particular case, injection moulding product production quality has been guaranteed from this. The time delay of the resistor and the capacitor is 2 minutes, because the time period of starting the machine is short, the heating temperature of the RTN of the electric heating plate needs a certain time, the temperature of the hot runner body 1 does not rise to about 200 ℃, and the buzzer B can sound unnecessarily if the time delay is not delayed, so that unnecessary interference is generated for workers; after 2 minutes, as the temperature rises to more than 200 ℃, the alarm sound can not be generated as long as all the hot runner bodies 1 are normally heated. In fig. 2, the resistances of the resistors R1 and R2 are 0.9M and 470K, respectively; the model of the NPN triode Q1 is 9013; the relay KN is a DC12V relay; the buzzer B is an active continuous audible alarm finished product with the type SF 12V; the electric push rod MN is a finished product of a reciprocating electric telescopic rod with the working voltage of direct current of 12V and the power of 20W; the capacitor C1 is an electrolytic capacitor with the model number of 20 muF/25V; the temperature switch WN is a normally closed contact type snap-through temperature switch finished product (temperature is controlled to be 200 ℃) of a model KSD 301.

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 specification describes embodiments, these embodiments are not intended to encompass only a single embodiment, and such description is merely for clarity, and those skilled in the art will be able to refer to the specification as a whole, and the embodiments may be suitably combined to form other embodiments as will be appreciated by those skilled in the art.

Claims

1. A hot runner device with adjustable nozzle height comprises a plurality of hot runner bodies, a stabilized voltage power supply, a power switch, an electric push rod, a relay, a temperature switch and a sleeve, and is characterized by also comprising a temperature detection circuit and a detection mechanism; the upper end of the nozzle of each hot runner body is arranged at the lower end of a sleeve, and the upper end of the sleeve is sleeved outside the hot runner body; the upper end of the electric push rod is arranged on one side of the upper end of the hot runner body, and the lower end of the electric push rod and one side of the sleeve are arranged together; the detection mechanism comprises an insulating base and a conducting strip, the conducting strip is installed at the lower end of the insulating base, and the insulating base is installed on one side of the lower end of the sleeve; the relay, the voltage-stabilized power supply, the power switch and the temperature detection circuit are arranged in the electric cabinet, and the temperature switch is arranged on the outer side of the sleeve; one end of the temperature switch is electrically connected with the signal input end of the temperature detection circuit, the first path and the second path of power supply output end of the power supply switch are electrically connected with the power supply input end of the electric push rod and the power supply input end of the relay respectively, and the normally closed contact end of the relay is electrically connected with the other power supply input end of the electric push rod.

2. The nozzle height adjustable hot-runner apparatus according to claim 1, wherein the temperature switch is a snap-off normally closed contact temperature switch.

3. The nozzle height adjustable hot runner apparatus of claim 1, wherein the power rod is a reciprocating power rod.

4. The hot-runner apparatus with adjustable nozzle height as claimed in claim 1, wherein the temperature detection circuit comprises a buzzer, a resistor, an NPN transistor and a capacitor, the two resistors are electrically connected, the collector of the NPN transistor is connected with the power input terminal of the negative electrode of the buzzer, one end of the first resistor is connected with one end of the second resistor and the positive electrode of the capacitor, the other end of the second resistor is connected with the base of the NPN transistor, and the emitter of the NPN transistor is connected with the negative electrode of the capacitor.