CN206374106U

CN206374106U - A kind of melamine dishware forming machine

Info

Publication number: CN206374106U
Application number: CN201621196947.5U
Authority: CN
Inventors: 吴登勇
Original assignee: Shanghai Mei'er Amine Products Co Ltd Its
Current assignee: Shanghai Mei'er Amine Products Co Ltd Its
Priority date: 2016-11-05
Filing date: 2016-11-05
Publication date: 2017-08-04
Anticipated expiration: 2026-11-05

Abstract

The utility model discloses a kind of melamine dishware forming machine, machine die holder, workbench, the mould on workbench being slidably connected including guide pillar, with guide pillar, also include the electric hot plate being arranged between workbench and machine die holder, soft heat-conducting layer is provided between workbench and mould, electric hot plate couples a thermostat, thermostat includes, power subsystem；Temperature detecting unit, for detecting the temperature of mould, and exports thermometric voltage signal；Control unit, for receiving thermometric voltage signal and according to the break-make of thermometric voltage signal control electric hot plate and power subsystem；With automatic temperature-controlled, mould preheating speed is fast, hommization prompting and the adjustable advantage of mold work temperature.

Description

A kind of melamine dishware forming machine

Technical field

The utility model is related to tableware processing and forming field, more specifically, it relates to a kind of melamine dishware forming machine.

Background technology

Melamine dishware is also known as Ceramic-imitated tableware, compressing by the heating pressurization of melamine resin powder.With its light and handy, attractive in appearance, ability The performance such as low temperature, resistant to cook, non-friable, is widely used in fast food and Pediatric diet industry etc. and uses.Melamine dishware is by melamine Kitchenware moulding machine high-temperature molding is obtained, and traditional melamine dishware forming machine is to be heated using electric hot plate to mould, and electric hot plate is installed Between workbench and machine die holder, mould is then arranged on workbench, during the arrangement works, the heat that electric hot plate is sent Mould is passed to by workbench, mould is reached the temperature required for shaping work, machine die holder is arranged on guide pillar, can Moved up and down along guide pillar, meet mould molding work.And traditional electric hot plate is continued using relatively low firm power to mould Heating, when the heat that mould absorbs from electric hot plate and the heat outwardly distributed arrival thermal balance, the temperature of mould no longer rises, The specified preheating temperature that now temperature can just start working for mould, electric hot plate keeps original power to realize insulation Effect.But this preheating method speed is slower, and electric hot plate can be accelerated reduction of service life under continuous firing state.

A kind of melamine dishware processing machine, melamine meal are disclosed in Publication No. CN203063015U Chinese patent Have fuselage of the processing machine by base, on base, the fuel tank on base, the motor on fuel tank, located at motor The electric cabinet composition of top, the fuselage is made up of hydraulic means and thermoforming processing unit (plant), the thermoforming processing unit (plant) by Heating plate, the heating plate located at fuselage upper end being fixedly arranged on piston rod are constituted.Heating plate is added indirectly by the way of motor heat Heat, and can be hit mutually when mold is pressed with lower mould, it is produced space between workbench, 2 points more than Cause that the heat conduction efficiency between workbench and mould is not high, preheating speed is slow.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is that offer one kind can be quick to mould progress pre- The melamine dishware forming machine of heat.

To achieve the above object, the utility model provides following technical scheme：

A kind of melamine dishware forming machine, including guide pillar, the machine die holder being slidably connected with the guide pillar, workbench, peace Mould on the workbench, in addition to the electric hot plate between the workbench and the machine die holder, Soft heat-conducting layer is provided between the workbench and mould, the electric hot plate couples a thermostat, the automatic warm Control device includes：Power subsystem；Temperature detecting unit, for detecting the temperature of mould, and exports thermometric voltage signal；Control is single Member, for receiving the thermometric voltage signal and controlling the electric hot plate and the power subsystem according to the thermometric voltage signal Break-make.

By using above-mentioned technical proposal, when the melamine dishware forming machine works, the heat that electric hot plate is sent passes through work Platform passes to mould, mould is reached the temperature required for shaping work, and machine die holder is arranged on guide pillar, can be along along guide pillar Lower movement, so as to meet mould molding work；Soft heat-conducting layer is provided between workbench and mould, work on the one hand can be improved Make the heat conduction efficiency between platform and mould, on the other hand, because the flexible nature of soft heat-conducting layer allows it well The gap between workbench and mould is filled, makes to remain good heat transfer, Er Qieyou between workbench and mould In the buffering of soft heat-conducting layer, the sound that mold hits mutually and sent with lower mould is reduced；Thermostat can be certainly It is dynamic to control electric hot plate to be heated to disconnection of the predetermined temperature again with power subsystem by control unit, when mold temperature is less than pre- constant temperature The connection of turn on automatically electric hot plate and power subsystem again when spending, from electric hot plate power when, without consider mould reach shaping The heat that mould absorbs from electric hot plate during temperature needed for work wants equal requirement with the heat outwardly distributed, can select times The electric hot plate of meaning power, when from powerful electric hot plate, so as to can reach the mesh that rapidly pre-warming and insulation are carried out to mould 's.

Further, the melamine dishware forming machine also abuts the workbench and described respectively including upper and lower surface The heat-conducting plate of machine die holder, the side wall of the heat-conducting plate is provided with thermal trough, and the electric hot plate is arranged in the thermal trough.

By using above-mentioned technical proposal, by setting heat-conducting plate to add the heat-conducting area to workbench, so that It is more uniform and quick to the heat transfer of workbench.

Further, the temperature detecting unit includes temperature sensor, and the temperature for detecting mould, its output end is defeated Go out the thermometric voltage signal.

Further, described control unit includes：Lower limit comparison circuit, is coupled to the output end of the temperature sensor, The thermometric voltage signal received is compared with a lower limit reference voltage and exports one first comparison signal；Upper limit comparison circuit, The output end of the temperature sensor is coupled to, the thermometric voltage signal received is compared output with a upper limit reference voltage One second comparison signal；State output circuit, is coupled to lower limit comparison circuit and upper limit comparison circuit, is received to basis First comparison signal and the second comparison signal export a corresponding temperature condition signal；Circuit is opened and closed, the state is coupled to defeated Go out circuit, to control the break-make between the electric hot plate and power subsystem according to the temperature condition signal.

Further, the lower limit comparison circuit includes：Lower limit reference voltage generation circuit, with a first resistor R1, Its one end is coupled to the second direct current Vout_2 of a high level, and the other end is grounded after being connected with a second resistance R2, from first The lower limit reference voltage is produced between resistance R1 and second resistance R2；First comparator A, with an in-phase input end, one anti- Phase input and an output end, the in-phase input end are coupled between first resistor R1 and second resistance R2, inverting input The output end of temperature sensor is coupled to, output end exports first comparison signal.

Further, the upper limit comparison circuit includes：Upper limit reference voltage generation circuit, with a 3rd resistor R3, Its one end is coupled to the second direct current Vout_2, and the other end is grounded after being connected with one the 4th resistance R4, from 3rd resistor R3 and the The upper limit reference voltage is produced between four resistance R4；Second comparator B, with an in-phase input end, an inverting input and One output end, the inverting input is coupled between 3rd resistor R3 and the 4th resistance R4, and in-phase input end is coupled to temperature The output end of sensor, output end exports second comparison signal.

Further, the state output circuit includes：OR gate OR_1, with two inputs and an output end, its First input end is coupled to first comparator A output end, and the second input is coupled to the second comparator B output end；T is triggered Device T_1, with control end T, input end of clock CK and output end Q, its control end T is coupled to the second direct current Vout_2, at that time Clock input CK is coupled to the output end of the OR gate OR_1, and exports the temperature condition signal in its output end Q.

Further, the keying circuit includes：NPN triode Q1, its grounded emitter, base stage passes through one the 5th resistance R5 be coupled to the output end Q of the T triggers T_1 and by one the 6th resistance R6 and emitter stage altogether；Normally opened relay KM1, The first end of its coil is coupled to one first direct current Vout_1, and the second end of its coil is coupled to the current collection of NPN triode Q1 Pole, its normally opened contact switch S1 one end is coupled with power subsystem, and its normally opened contact switch S1 other ends are coupled with the electric hot plate； First diode D1, its positive pole is coupled to the first end of normally opened relay KM1 coil, and negative pole is coupled to normally opened relay KM1 Coil the second end.

Further, the thermostat also includes temperature prompt unit, and the temperature prompt unit includes, and first LED 1, its negative pole is coupled to first comparator A output end, plus earth；NOT gate NOT_1, it is defeated with one Enter end and an output end, its input is coupled to first comparator A output end；Second LED 2, its negative pole It is coupled to NOT gate NOT_1 output end, plus earth.

By using above-mentioned technical proposal, when thermostat is started working, originally mold temperature is less than shaping work Temperature needed for making, the thermometric voltage signal of temperature sensor output end output is less than lower limit reference voltage and upper limit reference voltage, First comparator A output end exports the first comparison signal of high level, and the of the second comparator B output end output zero level Two comparison signals, OR gate OR_1 output end output high level, T triggers T_1 control end T is coupled to the height electricity of power subsystem The second flat direct current Vout_2, its output end Q initial equilibrium states output zero level, its input end of clock CK receives OR gate OR_1 outputs High level, then T triggers T_1 output end Q upset for output high level, after amplifying through NPN triode Q1, turn on it is normally opened after Electrical equipment KM1, closes its normally opened contact switch S1, and then turns on the connection of heat-conducting plate and power subsystem, makes heat-conducting plate start to add Heat, meanwhile, the negative pole of the first LED 1 receives the high level of first comparator A outputs and turned on, for pointing out work Make personnel's mold temperature and not yet reach lower working temperature, the high level of first comparator A outputs through NOT gate NOT_1 it is anti-phase after, The negative pole of second LED 2 receives the zero level of NOT gate NOT_1 output ends and ended；When mold temperature is just above under When limiting the corresponding lower working temperature of temperature reference voltages, the thermometric voltage signal of temperature sensor output end output is higher than lower limit Reference voltage simultaneously exports zero level, OR gate OR_1 outputs less than upper limit reference voltage, first comparator A and the second comparator B Zero level, T triggers T_1 receives the zero level of OR gate OR_1 outputs due to input end of clock CK, and output end Q will keep original State, output end Q continues to output high level, after amplifying through NPN triode Q1, makes normally opened relay KM1 normally opened contact switch S1 is remained closed, heat-conducting plate continue heat, meanwhile, first comparator A output zero level through NOT gate NOT_1 it is anti-phase after, second The negative pole of LED 2 receives the zero level of NOT gate NOT_1 output ends and turned on, for pointing out staff mould temperature Degree is higher than lower working temperature, can proceed by mould molding work, and the negative pole of the first LED 1 receives first Comparator A output zero level and end；When mold temperature upper limit working temperature corresponding just above ceiling temperature reference voltage When, the thermometric voltage signal of temperature sensor output end output is higher than lower limit reference voltage and upper limit reference voltage, and first compares Device A still exports zero level, and the second LED 2 is remain on, and the first LED 1 keeps extinguishing, the second ratio High level is exported compared with device B, OR gate OR_1 output high level, T triggers T_1 is defeated because input end of clock CK receives OR gate OR_1 The high level gone out, output end Q upsets are output zero level, end NPN triode Q1, and then normally opened relay KM1's is normally opened Contact switch S1 disconnects, and heat-conducting plate stops heating, it is achieved thereby that to the purpose of mould rapidly pre-warming.

When mould is just cooled to lower working temperature, under the thermometric voltage signal of temperature sensor output end output is less than Limit reference voltage and upper limit reference voltage, first comparator A output high level, NOT gate NOT_1 output zero levels, second luminous two Pole pipe LED2 ends, and the first LED 1 is turned on, and the second comparator B still exports zero level, the high electricity of OR gate OR_1 outputs Flat, T triggers T_1 output end Q upsets are output high level, and heat-conducting plate is begun to warm up；When mold temperature is just above lower limit work When making temperature, the thermometric voltage signal of temperature sensor output end output is higher than lower limit reference voltage and less than upper limit reference electricity Pressure, first comparator A and the second comparator B export zero level, NOT gate NOT_1 output high level, the second light emitting diode LED2 ends, and the first LED 1 is turned on, and OR gate OR_1 output zero levels, T trigger T_1 output ends Q keeps output High level, after amplifying through NPN triode Q1, remains closed normally opened relay KM1 normally opened contact switch S1, and heat-conducting plate continues Heating；When mold temperature upper limit working temperature corresponding just above ceiling temperature reference voltage, temperature sensor output end is defeated The thermometric voltage signal gone out is higher than lower limit reference voltage and upper limit reference voltage, and first comparator A still exports zero level, the second hair Optical diode LED2 is remain on, and the first LED 1 keeps extinguishing, the second comparator B output high level, OR gate OR_ 1 output high level, T trigger T_1 output ends Q upsets are output zero level, end NPN triode Q1, and then normally opened relay Device KM1 normally opened contact switch S1 disconnects, and heat-conducting plate stops heating, it is achieved thereby that the purpose being incubated to mould.

Further, the first resistor R1 and 3rd resistor R3 are variable resistance.

By using above-mentioned technical proposal, lower limit reference voltage and upper limit reference voltage correspond to the lower limit work of mould respectively Make temperature and upper limit working temperature, first resistor R1 and 3rd resistor R3 are variable resistance, the electricity of regulation first can be passed through Hinder R1 and 3rd resistor R3 resistance to change the size of lower limit reference voltage and upper limit reference voltage respectively, and then realize mould The adjustable purpose of operating temperature of tool.

Compared with prior art, the utility model has the advantages that：

（1）Electric hot plate couples a thermostat, mould can be entered by thermostat automatic controlled electric heating plate Row rapidly pre-warming is simultaneously incubated；

（2）Soft heat-conducting layer and heat-conducting plate are set, the preheating speed of mould is further improved；

（3）First comparator A output end couples a temperature prompt unit, for representing the state of temperature residing for mould, And then reaching whether prompting staff can proceed by the purpose of mould molding work, hommization is high；

（4）First resistor R1 and 3rd resistor R3 is variable resistance, and then it is adjustable to realize the operating temperature of mould The purpose of section.

Brief description of the drawings

Fig. 1 is the structural representation of the present embodiment；

Fig. 2 is the circuit diagram of thermostat；

Fig. 3 is the circuit diagram of power subsystem.

Reference：1st, guide pillar；2nd, machine die holder；3rd, workbench；4th, mould；5th, heat-conducting plate；51st, soft heat-conducting layer； 6th, electric hot plate；7th, L-shaped fixture；8th, thermal trough；9th, thermostat；10th, power subsystem；11st, temperature detecting unit；12、 Control unit；13rd, lower limit comparison circuit；14th, upper limit comparison circuit；15th, state output circuit；16th, circuit is opened and closed；17th, temperature Tip element.

Embodiment

In the prior art, electric hot plate using relatively low firm power come to mould continuous heating, when mould is inhaled from electric hot plate The heat of receipts and the heat outwardly distributed reach thermal balance, and the temperature of mould no longer rises, and now temperature just can for mould With the specified preheating temperature of start-up operation, electric hot plate keeps original power to realize the effect of insulation.But this preheating side Formula speed is slower, and electric hot plate can be accelerated reduction of service life under continuous firing state.And in mold and lower mould pressure It can mutually be hit during conjunction, it is produced space between workbench, cause the heat conduction efficiency between workbench and mould Further reduction.

With reference to the accompanying drawings and examples, the utility model is described in detail.

A kind of melamine dishware forming machine, as shown in figure 1, the machine die holder 2 being slidably connected including guide pillar 1, with guide pillar 1, work Make platform 3, the mould 4 on workbench 3, in addition to upper and lower surface abuts workbench 3 and machine die holder 2 respectively Heat-conducting plate 5, soft heat-conducting layer 51 is installed, soft heat-conducting layer 51 uses the soft heat conduction of GLPOLY between workbench and mould Silica gel piece is made, and mould 4 is fixed on workbench 3 by two L-shaped fixtures 7 being arranged on machine die holder 2, heat-conducting plate 5 side wall, which is provided with thermal trough 8, thermal trough 8, is provided with electric hot plate 6, and electric hot plate 6 couples a thermostat 9, such as Fig. 2 institutes Show, thermostat 9 includes：Power subsystem 10；Temperature detecting unit 11, for detecting the temperature of mould 4, and exports thermometric Voltage signal；Control unit 12, for receiving thermometric voltage signal and controlling electric hot plate 6 and power supply list according to thermometric voltage signal The break-make of member 10.

When the melamine dishware forming machine works, the heat that electric hot plate 6 is sent passes to mould 4 by workbench 3, makes mould Tool 4 reaches the temperature required for shaping work, and machine die holder 2 is arranged on guide pillar 1, can moved up and down along guide pillar 1, so as to meet The shaping work of mould 4；Between workbench 3 and mould 4 be provided with soft heat-conducting layer 51, on the one hand can improve workbench 3 with Heat conduction efficiency between mould 4, on the other hand, because the flexible nature of soft heat-conducting layer 51 allows it to fill work well Make the gap between platform 3 and mould 4, make to remain good heat transfer between workbench 3 and mould 4, and due to The buffering of soft heat-conducting layer 51, reduces the sound that mold hits mutually and sent with lower mould；And thermostat 9 can Disconnection of the upper limit working temperature again with power subsystem 10 is heated to automatically by the control electric hot plate 6 of control unit 12, when the temperature of mould 4 Degree connection of turn on automatically electric hot plate 6 and power subsystem 10 again when being less than lower working temperature, from electric hot plate 6 power when, Without consider mould 4 reach shaping work needed for temperature when the heat that absorbs from electric hot plate 6 of the mould 4 and heat that outwardly distributes Equal requirement is wanted, the electric hot plate 6 of any power can be selected, when from powerful electric hot plate 6, so as to can reach to mould Tool 4 carries out the purpose of rapidly pre-warming and insulation.

Lower limit reference voltage and upper limit reference voltage correspond to the lower working temperature and upper limit operation temperature of mould 4 respectively Degree, the temperature between lower working temperature and upper limit working temperature is the temperature required for the shaping work of mould 4.

The circuit diagram of power subsystem 10 is as shown in figure 3, its input is coupled to 220V AC powers, through over commutation decompression filtering After export the first direct current Vout_1, first direct current Vout_1 be 12V；Second direct current Vout_2, second direct current Vout_2 is 5V, so that thermostat 9 is used, in addition, directly powered from the input of power subsystem 10 to electric hot plate 6, I.e. the power supply of electric hot plate 6 is 220V AC powers.

Temperature detecting unit 11 includes temperature sensor, the temperature for detecting mould 4, its output end output thermometric voltage Signal.

Control unit 12 includes：Lower limit comparison circuit 13, is coupled to the output end of temperature sensor, by the thermometric received Voltage signal exports one first comparison signal compared with a lower limit reference voltage；Upper limit comparison circuit 14, is coupled to temperature biography The output end of sensor, the thermometric voltage signal received is compared with a upper limit reference voltage and exports one second comparison signal； State output circuit 15, is coupled to lower limit comparison circuit 13 and upper limit comparison circuit 14, to compare according to receive first Signal and the second comparison signal export a corresponding temperature condition signal；Circuit 16 is opened and closed, state output circuit 15 is coupled to, used To control the break-make between electric hot plate 6 and 220V AC powers according to temperature condition signal.

Lower limit comparison circuit 13 includes：Lower limit reference voltage generation circuit, with a first resistor R1, its one end is coupled to Second direct current Vout_2, the other end is grounded after being connected with a second resistance R2, between first resistor R1 and second resistance R2 Produce lower limit reference voltage；First comparator A, with an in-phase input end, an inverting input and an output end, homophase input End is coupled between first resistor R1 and second resistance R2, and inverting input is coupled to the output end of temperature sensor, output end Export the first comparison signal.

Upper limit comparison circuit 14 includes：Upper limit reference voltage generation circuit, with a 3rd resistor R3, its one end is coupled to Second direct current Vout_2, the other end is grounded after being connected with one the 4th resistance R4, between 3rd resistor R3 and the 4th resistance R4 Produce upper limit reference voltage；Second comparator B, with an in-phase input end, an inverting input and an output end, anti-phase input End is coupled between 3rd resistor R3 and the 4th resistance R4, and in-phase input end is coupled to the output end of temperature sensor, output end Export the second comparison signal.

State output circuit 15 includes：OR gate OR_1, with two inputs and an output end, its first input end coupling First comparator A output end is connected to, the second input is coupled to the second comparator B output end；T trigger T_1, with control End T processed, input end of clock CK and output end Q, its control end T are coupled to the second direct current Vout_2, its input end of clock CK couplings OR gate OR_1 output end is connected to, and in its output end Q output temperature status signals.

Opening and closing circuit 16 includes：NPN triode Q1, its grounded emitter, base stage is coupled to T by one the 5th resistance R5 and touched Send out device T_1 output end Q and by one the 6th resistance R6 and emitter stage altogether；Normally opened relay KM1, the first end coupling of its coil The first direct current Vout_1 is connected to, the second end of its coil is coupled to the colelctor electrode of NPN triode Q1, its normally opened contact switch S1 One end and 220V AC power sources, its normally opened contact switch S1 other ends are coupled with electric hot plate 6；First diode D1, it is just Pole is coupled to the first end of normally opened relay KM1 coil, and negative pole is coupled to the second end of normally opened relay KM1 coil.

Thermostat 9 also includes temperature prompt unit 17, and temperature prompt unit 17 includes, the first light emitting diode LED1, its negative pole is coupled to first comparator A output end, plus earth；NOT gate NOT_1, with an input and one Output end, its input is coupled to first comparator A output end；Second LED 2, its negative pole is coupled to NOT gate NOT_1 output end, plus earth.

First resistor R1 and 3rd resistor R3 is variable resistance.

When thermostat 9 is started working, originally the temperature of mould 4 is less than temperature, TEMP needed for shaping work The thermometric voltage signal of device output end output is less than lower limit reference voltage and upper limit reference voltage, first comparator A output end The first comparison signal of high level is exported, the second comparator B output end exports the second comparison signal of zero level, OR gate OR_1 Output end output high level, T triggers T_1 control end T is coupled to the second direct current Vout_2 for high level, and it is exported Q initial equilibrium states output zero level is held, its input end of clock CK receives the output of the high level, then T triggers T_1 of OR gate OR_1 outputs It is output high level to hold Q upsets, after amplifying through NPN triode Q1, turns on normally opened relay KM1, makes its normally opened contact switch S1 Closure, and then heat-conducting plate 5 and the connection of 220V AC powers are turned on, heat-conducting plate 5 is begun to warm up, meanwhile, the first light-emitting diodes Pipe LED1 negative pole receives the high level of first comparator A outputs and turned on, for pointing out the temperature of staff's mould 4 not yet to reach To lower working temperature, the high level of first comparator A outputs through NOT gate NOT_1 it is anti-phase after, the second LED 2 is negative Pole receives the zero level of NOT gate NOT_1 output ends and ended；When the temperature of mould 4 is corresponding just above lower limit temperature reference voltage During lower working temperature, the thermometric voltage signal of temperature sensor output end output is higher than lower limit reference voltage and less than upper limit ginseng Examine voltage, first comparator A and the second comparator B export zero level, OR gate OR_1 output zero levels, T triggers T_1 due to Input end of clock CK receives the zero level of OR gate OR_1 outputs, and output end Q will keep original state, and output end Q is continued to output High level, after amplifying through NPN triode Q1, remains closed normally opened relay KM1 normally opened contact switch S1, heat-conducting plate 5 after Continuous heating, meanwhile, the zero levels of first comparator A outputs through NOT gate NOT_1 it is anti-phase after, the negative pole of the second LED 2 connects Receive the zero level of NOT gate NOT_1 output ends and turn on, for pointing out the temperature of staff's mould 4 to be higher than lower working temperature, The shaping work of mould 4 can be proceeded by, the negative pole of the first LED 1 receives the zero level of first comparator A outputs And end；When the temperature of mould 4 upper limit working temperature corresponding just above ceiling temperature reference voltage, temperature sensor output end The thermometric voltage signal of output is higher than lower limit reference voltage and upper limit reference voltage, and first comparator A still exports zero level, second LED 2 is remain on, and the first LED 1 keeps extinguishing, the second comparator B output high level, OR gate OR_1 exports high level, and T triggers T_1 receives the high level of OR gate OR_1 outputs due to input end of clock CK, and output end Q is turned over Switch to export zero level, end NPN triode Q1, and then normally opened relay KM1 normally opened contact switch S1 disconnects, heat-conducting plate 5 stop heating, it is achieved thereby that to the purpose of the rapidly pre-warming of mould 4；When mould 4 is just cooled to lower working temperature, temperature The thermometric voltage signal of sensor output output is less than lower limit reference voltage and upper limit reference voltage, first comparator A outputs High level, NOT gate NOT_1 output zero levels, the second LED 2 ends, and the first LED 1 is turned on, and second Comparator B still exports zero level, and OR gate OR_1 output high level, T triggers T_1 output end Q upsets are led to export high level Hot plate 5 is begun to warm up；When the temperature of mould 4 is just above lower working temperature, the thermometric voltage of temperature sensor output end output Signal is higher than lower limit reference voltage and less than upper limit reference voltage, and first comparator A and the second comparator B export zero level, NOT gate NOT_1 exports high level, and the second LED 2 ends, and the first LED 1 is turned on, and OR gate OR_1 is defeated Go out zero level, T trigger T_1 output ends Q keeps output high level, after amplifying through NPN triode Q1, makes normally opened relay KM1 Normally opened contact switch S1 remain closed, heat-conducting plate 5 continue heat；When the temperature of mould 4 is just above ceiling temperature reference voltage pair During the upper limit working temperature answered, the thermometric voltage signal of temperature sensor output end output is joined higher than lower limit reference voltage and the upper limit Voltage is examined, first comparator A still exports zero level, and the second LED 2 is remain on, the first LED 1 Keep extinguishing, the second comparator B output high level, OR gate OR_1 output high level, T trigger T_1 output ends Q upsets are output Zero level, ends NPN triode Q1, and then normally opened relay KM1 normally opened contact switch S1 disconnects, and heat-conducting plate 5 stops adding Heat, it is achieved thereby that the purpose being incubated to mould 4.

In addition, lower limit reference voltage and upper limit reference voltage correspond to the lower working temperature and upper limit work of mould 4 respectively Make temperature, lower limit reference voltage and upper limit reference electricity can be changed respectively by adjusting first resistor R1 and 3rd resistor R3 resistance The size of pressure, and then reach the purpose of the operating temperature of regulation mould 4.

It the above is only preferred embodiment of the present utility model, protection domain of the present utility model is not limited merely to above-mentioned Embodiment, all technical schemes belonged under the utility model thinking belong to protection domain of the present utility model.It should be pointed out that pair For those skilled in the art, some improvements and modifications under the premise of the utility model principle is not departed from, These improvements and modifications also should be regarded as protection domain of the present utility model.

Claims

1. a kind of melamine dishware forming machine, including guide pillar (1), the machine die holder (2) being slidably connected with the guide pillar (1), work Platform (3), the mould (4) on the workbench (3), it is characterised in that also including installed in the workbench (3) electric hot plate (6) between the machine die holder (2), is provided with soft heat conduction between the workbench (3) and mould (4) Layer（51）, the electric hot plate (6) couples a thermostat (9), and the thermostat (9) includes,

Power subsystem (10)；

Temperature detecting unit (11), for detecting the temperature of mould (4), and exports thermometric voltage signal；

Control unit (12), for receiving the thermometric voltage signal and controlling the electric hot plate according to the thermometric voltage signal (6) with the break-make of the power subsystem (10).

2. melamine dishware forming machine according to claim 1, it is characterised in that the melamine dishware forming machine also includes upper Lower surface abuts the heat-conducting plate (5) of the workbench (3) and the machine die holder (2), the side of the heat-conducting plate (5) respectively Wall is provided with thermal trough (8), and the electric hot plate (6) is arranged in the thermal trough (8).

3. melamine dishware forming machine according to claim 1, it is characterised in that the temperature detecting unit (11) includes temperature Sensor is spent, the temperature for detecting mould (4), its output end exports the thermometric voltage signal.

4. melamine dishware forming machine according to claim 3, it is characterised in that described control unit (12) includes：

Lower limit comparison circuit (13), is coupled to the output end of the temperature sensor, by the thermometric voltage signal received and one Lower limit reference voltage, which compares, exports one first comparison signal；

Upper limit comparison circuit (14), is coupled to the output end of the temperature sensor, by the thermometric voltage signal received and one Upper limit reference voltage, which compares, exports one second comparison signal；

State output circuit (15), is coupled to lower limit comparison circuit (13) and upper limit comparison circuit (14), is received to basis The first comparison signal and the second comparison signal export a corresponding temperature condition signal；

Circuit (16) is opened and closed, the state output circuit (15) is coupled to, to according to temperature condition signal control Break-make between electric hot plate (6) and power subsystem (10).

5. melamine dishware forming machine according to claim 4, it is characterised in that the lower limit comparison circuit (13) includes：

Lower limit reference voltage generation circuit, with a first resistor R1, its one end is coupled to the second direct current of a high level Vout_2, the other end connected with a second resistance R2 after be grounded, produced between first resistor R1 and second resistance R2 it is described under Limit reference voltage；

First comparator A, with an in-phase input end, an inverting input and an output end, the in-phase input end is coupled to Between first resistor R1 and second resistance R2, inverting input is coupled to the output end of temperature sensor, and output end output is described First comparison signal.

6. melamine dishware forming machine according to claim 5, it is characterised in that the upper limit comparison circuit (14) includes：

Upper limit reference voltage generation circuit, with a 3rd resistor R3, its one end is coupled to the second direct current Vout_2, the other end It is grounded after being connected with one the 4th resistance R4, the upper limit reference voltage is produced between 3rd resistor R3 and the 4th resistance R4；

Second comparator B, with an in-phase input end, an inverting input and an output end, the inverting input is coupled to Between 3rd resistor R3 and the 4th resistance R4, in-phase input end is coupled to the output end of temperature sensor, and output end output is described Second comparison signal.

7. melamine dishware forming machine according to claim 6, it is characterised in that the state output circuit (15) includes：

OR gate OR_1, with two inputs and an output end, its first input end is coupled to first comparator A output End, the second input is coupled to the second comparator B output end；

T trigger T_1, with control end T, input end of clock CK and output end Q, its control end T is coupled to the second direct current Vout_2, its input end of clock CK are coupled to the output end of the OR gate OR_1, and export the state of temperature in its output end Q Signal.

8. melamine dishware forming machine according to claim 7, it is characterised in that the keying circuit (16) includes：

NPN triode Q1, its grounded emitter, base stage is coupled to the output end of the T triggers T_1 by one the 5th resistance R5 Q and by one the 6th resistance R6 and emitter stage altogether；

Normally opened relay KM1, the first end of its coil is coupled to one first direct current Vout_1, and the second end of its coil is coupled to The colelctor electrode of NPN triode Q1, its normally opened contact switch S1 one end is coupled with power subsystem (10), and its normally opened contact switch S1 is another One end is coupled with the electric hot plate (6)；

First diode D1, its positive pole is coupled to the first end of normally opened relay KM1 coil, and negative pole is coupled to normally opened relay Second end of KM1 coil.

9. melamine dishware forming machine according to claim 8, it is characterised in that the thermostat (9) also includes Temperature prompt unit (17), the temperature prompt unit (17) includes,

First LED 1, its negative pole is coupled to first comparator A output end, plus earth；

NOT gate NOT_1, with an input and an output end, its input is coupled to first comparator A output end；

Second LED 2, its negative pole is coupled to NOT gate NOT_1 output end, plus earth.

10. melamine dishware forming machine according to claim 9, it is characterised in that the first resistor R1 and 3rd resistor R3 is variable resistance.