Variable frequency mold temperature controller

Abstract

The utility model relates to the technical field of mould temperature adjustment, propose a kind of frequency conversion mould temperature machine, including the water pump, heater, water storage unit and cooling unit being arranged in machine storehouse;Water storage unit inlet end is used to connect the liquid outlet of water inlet device and mould, and water storage unit outlet end is used to connect water pump input end and cooling unit, and cooling drainage on-off pipeline is equipped between water storage unit and cooling unit;Water pump output end is used to connect heater water inlet, and heater water outlet is used to connect the liquid inlet of mould;In mould temperature adjustment process, liquid internal circulation heating waterway is formed between water storage unit, water pump, heater and mould;In mould cooling adjustment process, water storage unit, cooling drainage on-off pipeline and cooling unit are sequentially communicated, to make that hot fluid in liquid internal circulation heating waterway into water storage unit passes through cooling drainage on-off pipeline and enters cooling unit.

Description

Technical Field

[0001] This utility model relates to the technical field of mold temperature control, specifically to a variable frequency mold temperature controller. Background Technology

[0002] As a core temperature control device in the injection molding industry, the development of mold temperature controllers is closely related to the advancement of plastic processing technology. In traditional injection molding production, the stability of mold temperature directly affects the product molding quality, surface finish, and internal structural integrity. Early mold temperature controllers used a simple on-off temperature control method, adjusting the temperature by starting and stopping the heater. However, this control method suffered from significant temperature fluctuations and high energy consumption. Therefore, variable frequency mold temperature controllers emerged, adjusting the operating conditions of the water pump and heater to replace the frequent start-stop of traditional machines, thus achieving energy savings. Utility Model Content

[0003] This invention proposes a variable frequency mold temperature controller. During mold heating, the internal liquid circulation heating water circuit formed by the water storage unit, water pump, heater, and mold provides a continuous and stable supply of heat to the mold. During mold cooling, the water storage unit, cooling drain pipe, and cooling unit are sequentially connected. The hot fluid output from the mold to the water storage unit enters the cooling unit for cooling before being discharged outside the cooling unit, avoiding direct discharge of hot fluid and thus preventing damage to the drain pipe connected to the cooling unit's outlet connector. Since some liquid in the internal liquid circulation heating water circuit is released, the water inlet device needs to supply water to the water storage unit to replenish the liquid and prevent the heater from dry burning. The electrical control box is equipped with a frequency converter electrically connected to the water pump and a three-phase solid-state relay electrically connected to the heater. The operating conditions of the water pump and heater are adjusted according to the mold temperature, solving the problem of frequent start-stop of traditional machines and achieving energy saving.

[0004] A variable frequency mold temperature controller designed for this purpose includes a water pump, a heater, a water storage unit and a cooling unit installed in the machine compartment;

[0005] The water inlet of the water storage unit is used to connect the water inlet device and the liquid outlet of the mold, and the water outlet of the water storage unit is used to connect the water pump input and the cooling unit. A cooling drainage on / off pipe is provided between the water storage unit and the cooling unit.

[0006] The water pump output is used to connect to the heater inlet, and the heater outlet is used to connect to the mold inlet.

[0007] During the mold heating and regulation process, a liquid internal circulation heating water circuit is formed between the water storage unit, water pump, heater and mold;

[0008] During the mold cooling adjustment process, the water storage unit, cooling drain on / off pipe and cooling unit are connected in sequence so that the hot fluid entering the water storage unit in the liquid internal circulation heating water circuit enters the cooling unit through the cooling drain on / off pipe.

[0009] The water inlet device includes a filter connected to the water inlet of the water storage unit via a pipe. A first Y-type filter valve is provided at the front end of the filter inlet. The liquid enters the water storage unit after passing through the first Y-type filter valve and the filter. The water storage unit is provided with a first water inlet connected to the filter.

[0010] The cooling drain on / off pipeline includes a drain solenoid valve installed on the cooling drain pipe to switch the cooling drain on / off pipeline, and a second Y-type filter valve installed at the rear end of the drain solenoid valve inlet. When the drain solenoid valve is open, the liquid enters the cooling unit through the second Y-type filter valve and the drain solenoid valve. The water storage unit is provided with a first water outlet end connected to the cooling drain on / off pipeline.

[0011] The water storage unit is provided with a second water inlet, and a mold water outlet pipe connected to the liquid outlet of the mold is provided on the second water inlet. A third Y-type filter valve is provided on the water inlet of the mold water outlet pipe. The liquid output from the mold enters the water storage unit through the third Y-type filter valve and the mold water outlet pipe.

[0012] The water storage unit is equipped with a second water outlet that is connected to the water pump input.

[0013] The mold outlet pipe is equipped with a first temperature detector for detecting the temperature of the mold outlet water, and the first temperature detector is equipped with a first temperature probe that extends into the mold outlet pipe.

[0014] The connecting pipe between the water inlet device and the water storage unit is equipped with a water inlet pressure detector for detecting water inlet pressure, and a first connecting pipe connected to the water inlet pressure detector.

[0015] The heater outlet is equipped with a mold water inlet pipe connected to the mold inlet. The mold water inlet pipe is equipped with a second temperature detector for detecting the mold water inlet temperature, an outlet pressure detector for detecting the heater outlet pressure and the mold inlet water pressure, and a second connecting pipe connected to the outlet pressure detector.

[0016] The machine compartment is equipped with a mechanical pressure gauge for users to observe, and the mold water inlet pipe is equipped with a third connecting pipe that is connected to the mechanical pressure gauge.

[0017] The machine compartment is equipped with a pressure relief safety valve, and the mold water inlet pipe is equipped with a connecting valve that is connected to the pressure relief safety valve. The pressure relief output end of the pressure relief safety valve is equipped with an exhaust pressure relief pipe that extends out of the machine compartment.

[0018] The water pump is equipped with a fixing block for fixing to the bottom wall inside the machine compartment;

[0019] The heater is provided with a connecting block for fixing to the inner wall of the cabin;

[0020] The cooling unit is provided with a mounting block for fixing to the bottom wall of the engine compartment, and the cooling unit is provided with a water inlet connector for the cooling drainage on / off pipe. The water inlet connector is located on the side of the cooling unit and close to the bottom of the cooling unit.

[0021] The cooling unit is equipped with a water outlet connector, one end of which is connected to a drain pipe that extends out of the engine compartment.

[0022] An electrical control box is located on the outside of the machine compartment. Inside the electrical control box is a frequency converter that is electrically connected to the water pump and a three-phase solid-state relay that is electrically connected to the heater.

[0023] The machine compartment is equipped with a rotary over-temperature protector. The rotary over-temperature protector has a temperature detection end that extends into the heater to detect the heater's operating temperature. The knob of the rotary over-temperature protector is used to set the heater's protection temperature.

[0024] The beneficial technical effects of this utility model are as follows:

[0025] When the mold is heated, the internal liquid circulation heating water circuit formed by the water storage unit, water pump, heater, and mold can continuously and stably provide heat to the mold. During the mold cooling process, the water storage unit, cooling drain on / off pipe and cooling unit are connected in sequence. The hot fluid output from the mold to the water storage unit enters the cooling unit for cooling and then is discharged outside the cooling unit, avoiding direct discharge of hot fluid and thus avoiding damage to the drain pipe connected to the cooling unit's outlet connector. Since some liquid in the internal liquid circulation heating water circuit is released, the water inlet device needs to add water to the water storage unit to replenish the liquid and prevent the heater from burning dry. The electrical control box is equipped with a frequency converter electrically connected to the water pump and a three-phase solid-state relay electrically connected to the heater. According to the temperature adjustment status of the mold, the operating conditions of the water pump and heater are adjusted to solve the problem of frequent start-stop of traditional machines and achieve energy saving. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the internal structure of the cabin according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the internal structure of the cabin from another angle according to an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the initial water inlet structure of a mold temperature controller according to an embodiment of the present invention.

[0029] Figure 4This is a schematic diagram of the structure for depressurization during the internal circulation heating of liquid between the mold temperature controller and the mold, according to an embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram of a mold temperature controller used to cool a mold, according to an embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of a heater according to an embodiment of the present invention.

[0032] Figure 7 This is a schematic diagram of the structure of a water pump according to an embodiment of the present invention.

[0033] Figure 8 This is a schematic diagram of the structure of a water storage unit according to an embodiment of the present invention.

[0034] Figure 9 This is a schematic diagram of the cooling unit according to an embodiment of the present invention. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] See Figures 1-9 A variable frequency mold temperature controller includes a water pump 2, a heater 3, a water storage unit 4 and a cooling unit 5 installed in a machine compartment 1;

[0037] The water inlet of the water storage unit 4 is used to connect the water inlet device and the liquid outlet of the mold, and the water outlet of the water storage unit 4 is used to connect the input end 2.1 of the water pump 2 and the cooling unit 5. A cooling drainage on / off pipe 8 is provided between the water storage unit 4 and the cooling unit 5.

[0038] The output end 2.2 of the water pump 2 is used to connect to the inlet 3.1 of the heater 3, and the outlet 3.2 of the heater 3 is used to connect to the liquid inlet of the mold;

[0039] During the mold heating and adjustment process, the water storage unit 4, water pump 2, heater 3 and the mold form a liquid internal circulation heating water circuit;

[0040] During the mold cooling adjustment process, the water storage unit 4, the cooling drainage on / off pipe 8 and the cooling unit 5 are connected in sequence so that the hot fluid entering the water storage unit 4 in the liquid internal circulation heating water circuit enters the cooling unit 5 through the cooling drainage on / off pipe 8.

[0041] During mold heating, the internal liquid circulation heating water circuit formed by the water storage unit 4, water pump 2, heater 3, and mold can continuously and stably provide heat to the mold. During mold cooling, the water storage unit 4, cooling drain on / off pipe 8, and cooling unit 5 are connected in sequence. The hot fluid output from the mold to the water storage unit 4 enters the cooling unit 5 for cooling and then is discharged from the cooling unit 5, avoiding direct discharge of hot fluid and thus avoiding damage to the drain pipe connected to the water outlet 5.3 of the cooling unit 5. Since some liquid in the internal liquid circulation heating water circuit is released, the water inlet device needs to supply water to the water storage unit 4 to replenish the liquid and prevent the heater from burning dry. The electrical control box 25 is equipped with a frequency converter electrically connected to the water pump 2 and a three-phase solid-state relay electrically connected to the heater 3. According to the temperature adjustment status of the mold, the operating conditions of the water pump and heater are adjusted to solve the problem of frequent start-stop of traditional machines and achieve energy saving.

[0042] The water inlet device includes a filter 9 connected to the water inlet end of the water storage unit 4 via a pipe. A first Y-type filter valve 10 is provided at the front end of the water inlet of the filter 9. The liquid enters the water storage unit 4 through the first Y-type filter valve 10 and the filter 9. The water storage unit 4 is provided with a first water inlet end 4.1 connected to the filter 9.

[0043] The inclined channel structure of the first Y-type filter valve 10 can effectively capture large particulate impurities, and the filter 9 is an activated carbon filter, which reduces impurities in the pipeline and avoids pipeline blockage. The first Y-type filter valve 10 and the filter 9 constitute a dual impurity interception and filtration system.

[0044] The cooling drain on / off pipeline 8 includes a drain solenoid valve 11 installed on the cooling drain pipe to switch the on / off state of the cooling drain on / off pipeline 8, and a second Y-type filter valve 12 installed at the rear end of the water inlet of the drain solenoid valve 11. When the drain solenoid valve 11 is open, the liquid enters the cooling unit 5 through the second Y-type filter valve 12 and the drain solenoid valve 11. The water storage unit 4 is provided with a first water outlet 4.2 connected to the cooling drain on / off pipeline 8.

[0045] During the mold heating and adjustment process, the drain solenoid valve 11 is in the closed state, and the cooling drain on / off pipe 8 is equipped with a second Y-type filter valve 12, which plays a filtering role to prevent impurities from entering the cooling unit 5.

[0046] The water storage unit 4 is provided with a second water inlet 4.3. The second water inlet 4.3 is provided with a mold water outlet pipe 7 connected to the liquid outlet of the mold. The water inlet of the mold water outlet pipe 7 is provided with a third Y-type filter valve 13. The liquid output from the mold enters the water storage unit 4 through the third Y-type filter valve 13 and the mold water outlet pipe 7.

[0047] The water storage unit 4 is provided with a second water outlet 4.4 connected to the input end 2.1 of the water pump 2.

[0048] Since the customer's mold may be old and contain impurities, when the liquid output from the mold enters the water storage unit 4, the liquid needs to be filtered first through the third Y-type filter valve 13 to prevent impurities from entering the water storage unit 4.

[0049] The mold outlet pipe 7 is equipped with a first temperature detector 16 for detecting the temperature of the mold outlet water, and the first temperature detector 16 is equipped with a first temperature probe that extends into the mold outlet pipe 7.

[0050] The connecting pipe between the water inlet device and the water storage unit 4 is equipped with a water inlet pressure detector 14 for detecting water inlet pressure, and a first connecting pipe 18 connected to the water inlet pressure detector 14.

[0051] The water inlet pressure detector 14 can detect whether the water inlet device is effectively inletting water, and the first temperature detector 16 can detect the water outlet temperature of the mold in real time, so that the mold temperature controller can accurately adjust the mold temperature.

[0052] The heater 3 outlet 3.2 is provided with a mold water inlet pipe 6 connected to the mold inlet. The mold water inlet pipe 6 is provided with a second temperature detector 17 for detecting the mold water inlet temperature, an outlet pressure detector 15 for detecting the heater 3 outlet pressure and the mold inlet water pressure, and a second connecting pipe 19 connected to the outlet pressure detector 15.

[0053] The water pressure detector 15 can detect whether liquid has entered the mold, and the second temperature detector 17 can detect the water temperature entering the mold in real time, so that the mold temperature controller can accurately adjust the mold temperature.

[0054] The outer side of the machine compartment 1 is equipped with a mechanical pressure gauge 20 for user observation, and the mold water inlet pipe 6 is equipped with a third connecting pipe 21 that is connected to the mechanical pressure gauge 20.

[0055] The machine compartment 1 is equipped with a pressure relief safety valve 22, and the mold water inlet pipe 6 is equipped with a connecting valve 23 connected to the pressure relief safety valve 22. The pressure relief output end of the pressure relief safety valve 22 is equipped with an exhaust pressure relief pipe 24 extending out of the machine compartment 1.

[0056] During the mold heating and adjustment process, the water storage unit 4, water pump 2, heater 3 and mold form a liquid internal circulation heating water circuit; the liquid is repeatedly heated by the heater 3, generating a large amount of hot steam. When the gas pressure in the pipeline is too high, the pressure relief safety valve 22 opens, and the hot steam is discharged out of the machine compartment through the pressure relief safety valve 22 and the exhaust pressure relief pipe 24. The exhaust pressure relief pipe 24 extends out of the machine compartment 1 to prevent the accumulation of condensate in the machine compartment 1.

[0057] The water pump 2 is equipped with a fixing block 2.3 for fixing to the bottom wall of the machine compartment 1;

[0058] The heater 3 is provided with a connecting block 3.3 for fixing to the inner wall of the machine compartment 1;

[0059] The cooling unit 5 is provided with a mounting block 5.1 for fixing to the bottom wall of the engine compartment 1, and the cooling unit 5 is provided with a water inlet connector 5.2 for the cooling drain pipe 8. The water inlet connector 5.2 is located on the side of the cooling unit 5 and close to the bottom of the cooling unit 5.

[0060] The cooling unit 5 is equipped with a water outlet connector 5.3, one end of which is connected to a drain pipe, which extends out of the machine compartment 1;

[0061] An electrical control box 25 is provided on the outside of the machine compartment 1. The electrical control box 25 contains a frequency converter that is electrically connected to the water pump 2 and a three-phase solid-state relay that is electrically connected to the heater 3.

[0062] The frequency converter and the three-phase solid-state relay each control a separate component, reducing interference from the current signal and improving stability.

[0063] The cooling unit 5 may be equipped with a spiral flow channel to increase the liquid flow time and achieve natural heat dissipation during the liquid flow process.

[0064] In this embodiment, the fixing block 2.3, the connecting block 3.3 and the mounting block 5.1 are all provided with mounting holes for inserting screws.

[0065] In this embodiment, the second water inlet 4.3 connected to the mold water outlet pipe 7 is located above the first water inlet 4.1, so that the mold water outlet pipe 7 and the water inlet pipe of the water inlet device are arranged vertically at intervals and reasonably distributed. The second water outlet 4.4 is located below the first water outlet 4.2. Cold water has a high density and is generally located at the bottom of the water storage unit 4. Therefore, when the mold is cooled and adjusted, since the second water outlet 4.4 is located below the first water outlet 4.2, it is convenient for the hot water inside the water storage unit 4 to enter the cooling drainage on / off pipe 8 through the first water outlet 4.2.

[0066] The machine compartment 1 is equipped with a rotary overheat protector 26. The rotary overheat protector 26 has a temperature detection end that extends into the heater 3 to detect the working heating temperature of the heater 3. The knob of the rotary overheat protector 26 is used to set the protection temperature of the heater 3 and set the upper limit of the maximum heating temperature of the heater 3 during operation, so as to play a protective role.

[0067] The housing 1 contains a support block for fixing the rotary over-temperature protector 26. The housing 1 also contains a bracket for fixing the pressure detector, and the bracket and the support block are fixed to the housing 1 by welding.

[0068] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A variable frequency mold temperature controller, characterized by: Includes a water pump (2), a heater (3), a water storage unit (4), and a cooling unit (5) installed in the machine compartment (1); The water inlet of the water storage unit (4) is used to connect the water inlet device and the liquid outlet of the mold. The water outlet of the water storage unit (4) is used to connect the input end (2.1) of the water pump (2) and the cooling unit (5). A cooling drainage on / off pipe (8) is provided between the water storage unit (4) and the cooling unit (5). The output end (2.2) of the water pump (2) is used to connect to the inlet (3.1) of the heater (3), and the outlet (3.2) of the heater (3) is used to connect to the liquid inlet of the mold; During the mold heating and adjustment process, the water storage unit (4), water pump (2), heater (3) and the mold form a liquid internal circulation heating water path; During the mold cooling adjustment process, the water storage unit (4), the cooling drain on / off pipe (8) and the cooling unit (5) are connected in sequence so that the hot fluid entering the water storage unit (4) in the liquid internal circulation heating water circuit enters the cooling unit (5) through the cooling drain on / off pipe (8).

2. The variable frequency mold temperature controller according to claim 1, characterized in that: The water inlet device includes a filter (9) connected to the water inlet of the water storage unit (4) via a pipe. A first Y-type filter valve (10) is provided at the front end of the water inlet of the filter (9). The liquid enters the water storage unit (4) through the first Y-type filter valve (10) and the filter (9). The water storage unit (4) is provided with a first water inlet (4.1) connected to the filter (9).

3. The variable frequency mold temperature controller according to claim 1, characterized in that: The cooling drain on / off pipeline (8) includes a drain solenoid valve (11) installed on the cooling drain pipe to switch the on / off state of the cooling drain on / off pipeline (8), and a second Y-type filter valve (12) installed at the rear end of the water inlet of the drain solenoid valve (11). When the drain solenoid valve (11) is open, the liquid enters the cooling unit (5) through the second Y-type filter valve (12) and the drain solenoid valve (11). The water storage unit (4) is provided with a first water outlet (4.2) connected to the cooling drain on / off pipeline (8).

4. The variable frequency mold temperature controller according to claim 1, characterized in that: The water storage unit (4) is provided with a second water inlet (4.3), and a mold water outlet pipe (7) connected to the liquid outlet of the mold is provided on the second water inlet (4.3). A third Y-type filter valve (13) is provided on the water inlet of the mold water outlet pipe (7). The liquid output from the mold enters the water storage unit (4) through the third Y-type filter valve (13) and the mold water outlet pipe (7). The water storage unit (4) is provided with a second water outlet (4.4) connected to the input end (2.1) of the water pump (2).

5. The variable frequency mold temperature controller according to claim 4, characterized in that: The mold outlet pipe (7) is equipped with a first temperature detector (16) for detecting the temperature of the mold outlet water. The first temperature detector (16) is equipped with a first temperature probe that extends into the mold outlet pipe (7).

6. The variable frequency mold temperature controller according to claim 1, characterized in that: The water inlet device and the water storage unit (4) are connected by a water inlet pressure detector (14) for detecting water inlet pressure and a first connecting pipe (18) connected to the water inlet pressure detector (14).

7. The variable frequency mold temperature controller according to claim 1, characterized in that: The outlet (3.2) of the heater (3) is provided with a mold water inlet pipe (6) connected to the liquid inlet of the mold. The mold water inlet pipe (6) is provided with a second temperature detector (17) for detecting the mold water inlet temperature, an outlet pressure detector (15) for detecting the outlet pressure of the heater (3) and the inlet pressure of the mold, and a second connecting pipe (19) connected to the outlet pressure detector (15).

8. The variable frequency mold temperature controller according to claim 7, characterized in that: The machine compartment (1) is provided with a mechanical pressure gauge (20) for users to observe, and the mold water inlet pipe (6) is provided with a third connecting pipe (21) connected to the mechanical pressure gauge (20).

9. The variable frequency mold temperature controller according to claim 7, characterized in that: The machine compartment (1) is equipped with a pressure relief safety valve (22), and the mold water inlet pipe (6) is equipped with a connecting valve (23) connected to the pressure relief safety valve (22). The pressure relief output end of the pressure relief safety valve (22) is equipped with an exhaust pressure relief pipe (24) extending out of the machine compartment (1).

10. The variable frequency mold temperature controller according to claim 1, characterized in that: The water pump (2) is provided with a fixing block (2.3) for fixing to the bottom wall of the machine compartment (1). The heater (3) is provided with a connecting block (3.3) for fixing to the inner wall of the machine compartment (1). The cooling unit (5) is provided with a mounting block (5.1) for fixing to the bottom wall of the machine compartment (1), and the cooling unit (5) is provided with a water inlet connector (5.2) for the cooling drain pipe (8). The water inlet connector (5.2) is located on the side of the cooling unit (5) and close to the bottom of the cooling unit (5). The cooling unit (5) is equipped with a water outlet connector (5.3), one end of which is connected to a drain pipe, which extends out of the machine compartment (1); The outer side of the machine compartment (1) is provided with an electrical control box (25), which is equipped with a frequency converter electrically connected to the water pump (2) and a three-phase solid-state relay electrically connected to the heater (3). The machine compartment (1) is equipped with a rotary overheat protector (26). The rotary overheat protector (26) is equipped with a temperature detection end that extends into the heater (3) to detect the working heating temperature of the heater (3). The knob of the rotary overheat protector (26) is used to set the protection temperature of the heater (3).

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