CN218111568U

CN218111568U - Can drive hot runner device dismantled that mechanism carries out protection to electricity

Info

Publication number: CN218111568U
Application number: CN202221732614.5U
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: 2022-07-05
Filing date: 2022-07-05
Publication date: 2022-12-23
Anticipated expiration: 2032-07-05

Abstract

A detachable hot runner device capable of protecting an electric drive mechanism comprises a plurality of hot runner bodies; the water level detection mechanism and the cooling mechanism are also arranged; the cooling mechanism comprises a cylinder body and an exhaust valve, the cylinder body is arranged on the outer side of the electric driving mechanism of each hot runner body, and the exhaust valve is arranged on an upper cover of the cylinder body; the water level detection mechanism comprises at least two metal rods and a control circuit, and the two metal rods are arranged at one end of the inner side of the cylinder in an insulating way; the hot runner body comprises an upper shell and a lower shell, wherein the lower end of the upper shell and the upper end of the lower shell are installed together. The novel hot runner body is based on the hot runner body, the upper shell and the lower shell can be conveniently disassembled and assembled together, so that after various conditions including blockage and the like occur in the shell, workers can conveniently maintain the interior of the shell; this novel electrically drive mechanism that constitutes through water-cooling mode to electric putter dispels the heat, can the very first time suggestion staff filling when lack of water in the barrel, has improved electrically and has driven mechanism life.

Description

Can drive mechanism to electricity and carry out dismantling hot runner device protected

Technical Field

The utility model relates to a corollary equipment technical field, especially a can carry out the hot runner device dismantled of protecting to electricity driving mechanism.

Background

In the injection molding industry, a hot runner generally refers to a pipeline between a heating and melting device (such as a screw extruder) and a casting mold, and plastic raw material fluid output by the heating and melting device 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 installed between the two layers, the temperature of the electric heating mechanism is kept at about 200 ℃, an annular hollow PTC constant-temperature electric heating plate finished product is generally adopted, the power is about 300W), and the plastic raw material fluid is kept in a melting state before entering the mold through a mold plastic raw material inlet (sprue) (a plurality of sprues can correspond to one mold, or a plurality of sprues can correspond to 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 runner is of a fixed structure due to the limitation of the structure, and therefore when the shell is blocked, the shell cannot be cleaned, and adverse effects can be brought to normal application. In addition, the electric driving mechanism matched with the existing hot runner has no cooling measure, so that heat at about 200 ℃ in the shell can be conducted into the motor at the upper end of the electric push rod cylinder through the electric push rod cylinder, the insulating layer of the coil winding of the motor can be damaged due to the long-term high-temperature action, the output power of the motor is reduced, even the motor is burnt out due to short circuit, the production is influenced, and unnecessary economic loss can be brought to a machine owner. In summary, it is very necessary to provide a hot runner device capable of separating the housing from the hot runner body and effectively cooling the electric driving mechanism.

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 combined action in using, can conveniently dismantle between hot runner body and the casing, do benefit to the staff and maintain in the casing to can effectively dispel the heat through the electricity that water-cooling mode constitutes to electric drive mechanism, improved one kind of the mechanism life of electricity drive can drive the removable hot runner device that the mechanism carries out the protection to the electricity.

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

a detachable hot runner device capable of protecting an electric drive mechanism comprises a plurality of hot runner bodies; it is characterized by also comprising a water level detection mechanism and a cooling mechanism; the cooling mechanism and the water level detection mechanism are respectively provided with a plurality of sets, each hot runner body is matched with one set of cooling mechanism and one set of water level detection mechanism, the cooling mechanism comprises a cylinder body and an exhaust valve, the cylinder body is arranged on the outer side of the electric drive mechanism of each hot runner body, the upper end of the cylinder body is provided with an upper cover, and the exhaust valve is arranged on the upper cover of the cylinder body; the water level detection mechanism comprises at least two metal rods and a control circuit, and the two metal rods are arranged at one end of the inner side of the cylinder in an insulating way; the hot runner body comprises a shell, a hot runner body and a heat exchanger, wherein the shell of the hot runner body is divided into an upper shell and a lower shell, and the lower end of the upper shell and the upper end of the lower shell are installed together; and the power output end of the stabilized voltage power supply is electrically connected with the power input end of the water level detection mechanism.

Furthermore, water is filled in the cylinder.

Furthermore, the outer diameters of the upper shell and the lower shell are consistent, and the joint part of the upper shell and the lower shell is of a sealed structure.

Further, the control circuit comprises a resistor, NPN triodes and a buzzer which are electrically connected, wherein the positive power supply input end of the buzzer is connected with one end of the first resistor, the other end of the first resistor is connected with the base electrode of the second NPN triode and the collector electrode of the first NPN triode, one end of the second resistor is connected with the base electrode of the first NPN triode, the emitting electrodes of the two NPN triodes are connected, and the collector electrode of the second NPN triode is connected with the negative power supply input end of the buzzer.

The utility model has the advantages that: the novel hot runner body is based on the hot runner body, the upper shell and the lower shell can be conveniently disassembled and assembled together, so that after various conditions including blockage and the like occur in the shell, workers can conveniently maintain the interior of the shell; this novel electrically drive mechanism that constitutes through water-cooling mode to electric putter dispels the heat, can the very first time suggestion staff filling when lack of water in the barrel, has improved electrically and has driven mechanism life. 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 of the present invention;

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

Detailed Description

As shown in figures 1 and 2, a detachable hot runner device capable of protecting an electric driving mechanism comprises a plurality of hot runner bodies 1 (an annular electric heating mechanism 2 is arranged between an outer layer and an inner layer of the outer side), a stabilized voltage power supply A1 and a power switch S, wherein the plurality of hot runner bodies 1 are matched with a shell 4, a feeding pipe 5 and an electric driving mechanism 6, a valve rod 7 driven by the electric driving mechanism 6 (the electric driving mechanism 6 based on an electric push rod is adopted in the embodiment) is vertically arranged in each hot runner body 1 (the electric driving mechanism 6 is positioned outside the upper end of the shell, the upper end of the valve rod 7 is welded with a movable rod at the lower end of the electric driving mechanism 6, the valve rod 7 enters the hot runner body 1 through the upper end of the hot runner body), a worker controls the electric driving mechanism 6 to drive the valve rod 7 to move downwards through the power switch to close the inner lower end of a nozzle 8 of the hot runner body 1 and close fluid raw material entering the mold (the upper end of the nozzle 8 is arranged at the lower end of the hot runner body 1 and a fluid hole is arranged in the middle part of the lower part), or the lower ends of nozzles 8 of the hot runner bodies 1 are opened to control fluid to enter the mold (the solidified raw materials remained in the hot runner bodies 1 and the like are melted by an electric heating mechanism applied next time, so that normal injection molding in the mold is ensured), the upper parts of a plurality of hot runner bodies 1 are respectively arranged at the outer lower ends of the shell 4 (communicated with the inside of the shell 4), the upper ends of a plurality of hot runner bodies 1 are connected with the hollow shell 4 in parallel, the lower end of a feed pipe 5 is arranged at the outer upper end of the shell 4 and communicated with the inside of the shell 4, the upper ends of the feed pipe 5 are connected with a discharge pipe of heating melting equipment, and the lower ends of the nozzles of a plurality of hot runner bodies 1 are positioned at the upper parts of a plurality of mold raw material inlets; a water level detection mechanism and a cooling mechanism 9 are also arranged; the cooling mechanism 9 and the water level detection mechanism are respectively provided with a plurality of sets, each hot runner body 1 is matched with one cooling mechanism 9 and one water level detection mechanism, each cooling mechanism comprises a hollow cylindrical barrel 91 and an exhaust valve 92, the lower end and the upper end of each barrel 91 are both of an open structure, the lower end of each barrel 91 is welded on a shell 4 positioned at the side end of each hot runner body electric driving mechanism 6, the upper end of each barrel 91 is provided with an external thread, each barrel is matched with an upper cover 93 (opened to be filled with water in the barrel) with an internal thread at the lower end, the upper cover 93 is screwed into the external thread of the barrel through the internal thread and is installed on the barrel 91, the middle part of the upper cover 93 at the upper end of the barrel 91 is provided with an opening, an air inlet pipe of the exhaust valve 92 is installed outside the upper end of the upper cover opening of the barrel 91 through the external thread and a nut, the air inlet pipe is communicated with the barrel 91, and a lead connected with the electric push rod 6 is led out through the opening at the right upper end of the barrel 91 and the opening is sealed by sealant; the water level detection mechanism comprises two copper rods T and a control circuit 10, the left sides of the two copper rods T are respectively welded on a plastic plate in a hot melting mode at intervals of 2 mm in the vertical direction, the plastic plate is installed in the middle of the inner portion of the cylinder 91 through screw nuts, and a lead connected with the two copper rods T is led out through an opening in the upper end of the right side of the cylinder 91; the housing 4 is divided into an upper portion and a lower portion, rectangular fixing plates are respectively arranged on the outer side of the lower end of the upper housing 41 and the outer side of the upper end of the lower housing 42, a plurality of fixing holes are formed in the fixing plates at intervals, and the fixing plates at the lower end of the upper housing 41 and the upper end of the lower housing 42 are installed together through the fixing holes through screw nuts. The stabilized voltage supply A1 and the control circuit 10 are arranged in the electric cabinet 11.

As shown in fig. 1 and 2, the cylinder 91 is filled with water. The outer diameters of the upper shell 41 and the lower shell 42 are consistent, and the joint part of the upper shell and the lower shell is of a sealing structure. The stabilized voltage supply A1 is a finished product of a switching power supply module with the type of 220V/12V/1KW, namely, 220V AC to 12V DC. The control circuit comprises resistors R1 and R2, NPN triodes Q1 and Q2 and a buzzer B which are connected through circuit board wiring, wherein the positive power input end of the buzzer B is connected with one end of a first resistor R2, the other end of the first resistor R2 is connected with the base electrode of a second NPN triode Q2 and the collector electrode of the first NPN triode Q1, one end of a second resistor R1 is connected with the base electrode of the first NPN triode Q1, the emitting electrodes of the two NPN triodes Q1 and Q2 are connected, and the collector electrode of the second NPN triode Q2 is connected with the negative power input end of the buzzer B. Pins 1 and 2 of a power input end of a stabilized voltage power supply A1 are respectively connected with two poles of an alternating current 220V power supply through leads, and

pins

3 and 4 of a power output end of the stabilized voltage power supply A1, a positive power input end of a buzzer B of the power input end of the water level detection mechanism and an emitting electrode of an NPN triode Q1 are respectively connected through leads.

As shown in fig. 1 and 2, in the present novel hot runner body 1, a using method of the novel hot runner body 1 is completely consistent with that of an existing hot runner, when the hot runner is in use, 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 shell 4 and a feed pipe 5, and then enter a plurality of casting molds through a plurality of gates of the molds through nozzles 8 at the lower ends of the plurality of hot runner bodies 1, and the plurality of hot runner bodies 1 ensure that raw material fluids output by the heating and melting device in the previous process are kept in a molten state before entering the molds through a plastic raw material inlet (gate) of the molds by a method of an electric heating mechanism 2 (the electric heating mechanism heats the fluid flowing through the inside after being electrified), so that the fluid raw materials entering the molds are uniformly dispersed, thereby playing a powerful technical support for ensuring the quality of the poured plastic products; in actual conditions, if the staff drives the valve rod to move downwards through another power switch control electric drive mechanism 6, the lower end in the hot runner body 1 is closed and the fluid raw material entering the mold is closed, and if the electric drive mechanism 6 controls the valve rod to move upwards, the lower end in the hot runner body 1 is not closed any more, and the fluid raw material enters the mold through the nozzle. After the main power switch S is turned on, 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 power input end of the water level detection mechanism, and the water level detection mechanism works when power is supplied. In this is novel, the heat that the during operation fluid raw materials produced acts on the water in the barrel 91 through the casing, and water absorbs the heat, and the heat that acts on electric putter 6 like this is lower relatively, and electric putter inside motor has not highly improved life because the temperature rise. Under the actual conditions, after the great pressure of the relatively higher production of the interior water temperature of barrel 91, discharge valve 92's case can be opened and then with pressure release, and pressure recovery normal back case is closed (this is novel because fluid raw materials temperature is higher, and also has certain heat after the temperature risees, and it can not exert an influence to the fluid mobility that gets into in the casing).

As shown in fig. 1 and 2, in the water level detection mechanism, when the water level in the cylinder is high, the two copper rods T are submerged by water, so that the positive electrode of the 12V power supply passes through the water and the resistor R1 (voltage reduction and current limitation), the base voltage of the two copper rods T entering the NPN triode Q1 is higher than 0.7v, the NPN triode Q1 is conducted, the collector output low level enters the base of the NPN triode Q2, the base of the NPN triode Q2 is not properly biased and is cut off, and the rear buzzer B does not sound. When the water level in the cylinder is low, the water does not submerge the two copper rods T any more, so that the resistance between the two copper rods T is infinite, the voltage of the base electrode entering the NPN triode Q1 is lower than 0.7V, the cut-off collector electrode of the NPN triode Q1 does not output low level to enter the base electrode of the NPN triode Q2, the base electrode of the NPN triode Q2 is subjected to voltage reduction and current limitation through the resistor R2 to obtain proper forward bias voltage to conduct the collector electrode and output low level to enter the negative electrode power input end of the buzzer B, and then the buzzer B is electrified to give a loud warning sound to prompt a worker to open the upper cover in time to add water. In fig. 2, the resistances of the resistors R1 and R are 1K and 47K, respectively; the model of the NPN triode Q1 and Q2 is 9013; the buzzer B is an active continuous sound buzzer alarm finished product with the model SF 12V; the electric push rod 6 is a finished product of a reciprocating electric telescopic rod with working voltage of direct current 12V and power of 10W; the exhaust valve is a finished product of a pressure valve with the model BK-315P, and a pressure relief valve (1 Mpa) is arranged in the cylinder body.

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

1. A detachable hot runner device capable of protecting an electric drive mechanism comprises a plurality of hot runner bodies and a stabilized voltage power supply; it is characterized by also comprising a water level detection mechanism and a cooling mechanism; the cooling mechanism and the water level detection mechanism are respectively provided with a plurality of sets, each hot runner body is matched with one set of cooling mechanism and one set of water level detection mechanism, the cooling mechanism comprises a cylinder body and an exhaust valve, the cylinder body is arranged on the outer side of the electric driving mechanism of each hot runner body, the upper end of the cylinder body is provided with an upper cover, and the exhaust valve is arranged on the upper cover of the cylinder body; the water level detection mechanism comprises at least two metal rods and a control circuit, and the two metal rods are installed at one end of the inner side of the cylinder in an insulating mode; the hot runner body comprises a shell, a hot runner body and a heat exchanger, wherein the shell of the hot runner body is divided into an upper shell and a lower shell, and the lower end of the upper shell and the upper end of the lower shell are installed together; and the power output end of the stabilized voltage power supply is electrically connected with the power input end of the water level detection mechanism.

2. The removable hot runner apparatus that protects an electric drive mechanism of claim 1 wherein the barrel is filled with water.

3. The removable hot runner apparatus that protects an electric drive mechanism of claim 1, wherein the upper housing and the lower housing have the same outer diameter and the combination of the two is of a sealed construction.

4. The removable hot runner apparatus for protection of electric drives of claim 1, wherein the control circuit comprises a resistor, an NPN transistor, and a buzzer electrically connected to each other, wherein the positive power input of the buzzer is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the second NPN transistor and the collector of the first NPN transistor, one end of the second resistor is connected to the base of the first NPN transistor, the emitters of the two NPN transistors are connected, and the collector of the second NPN transistor is connected to the negative power input of the buzzer.