CN1417023A - Press and its control method - Google Patents

Abstract

The present invention provides a press device comprising a heat plate provided between a pair of approachable and detachable planar plates. A heater provided on a heat plate and a heat medium oil which circulates in a heat medium oil circulating circuit formed in the heat plate are used to heat the heat plate, such that there is not need to increase the pressure resistant capability even if the workpiece is formed by a resin having an extremely high forming temperature. The present invention is realized by using a silicone heat medium oil as the heat medium oil which circulates in a heat medium oil circulating circuit.

Description

The control method of pressure setting and pressure setting

Technical field

The present invention relates to a kind of pressure setting of shaping resin system machined object.

Background technology

In the past, for Production Example such as plastics system IC-card (integrated circuit card), printed circuit board (PCB) (PWB) etc., adopted the pressure setting of shaping plastics system machined object.This pressure setting heats the solid operation of hot pressing that machined object pressurizes while have by hot plate.

In the aforesaid pressure setting, there is a kind of pressure setting to possess the pair of plates up and down that hot plate is installed by thermal insulation barriers respectively.In this pressure setting, the heating of hot plate is to be undertaken by the heater that is installed on each hot plate, and its control is with controllable silicon (thyristor) unit and controller control.In addition, in the pressure setting that the real fair 6-27364 communique of Japan discloses, form heating channel between heater and hot plate, indirectly with the hot plate heating, aforementioned hot medium oil circulates in comprising the thermal medium closed circuit of heating channel by thermal medium oil.

In recent years, develop the various resins that forming temperature reaches 400 ℃, these resins use as heat-resisting building material.When the pressure setting of communique adopts pressure setting by thermal medium oil indirect hot plate to be shaped this resin as described above, thermal medium oil need be heated to forming temperature, promptly 400 ℃.

But when the organic thermal medium oil that adopts was heated to 400 ℃ usually, its vapour pressure was high, reaches more than the 1MPa.Therefore, must fully guarantee the withstand voltage properties of pipe arrangement, thereby cause device to maximize.

Again, in the pressure setting that above-mentioned communique is put down in writing,, therefore high-tension distribution need be installed on Gao Re and the hot plate that moves up and down, therefore need to dispose the mechanism that distribution is used safely because of being formation at the built-in electric heater of hot plate.

Summary of the invention

In view of the above problems, the purpose of this invention is to provide a kind of pressure setting,, also need not improve the withstand voltage properties of piping system even when the higher resin of this pressure setting shaping forming temperature is shaped machined object.

Solve the means of problem

For solving the above problems, pressure setting of the present invention is the thermal medium oil of silicon system as its thermal medium oil employing.With the thermal medium oil ratio of organic system, even silicon is thermal medium oil temperature be 400 ℃ of its vapour pressures also be 1～1.5kPa therefore than low degree, even also need not improve the withstand voltage properties of its piping system when forming machined object in being shaped by the resin of forming temperature up to 400 ℃.

The preferably, the principal component of aforementioned hot medium oil is a dimethicone.

Pressure setting preferably has pressure with thermal medium oil and remains on the thermal medium oil vapour and press pressure regulating mechanism in the above prescribed limit.By the pressure of thermal medium oil being adjusted to more than the thermal medium oil vapour pressure, thermal medium oil does not gasify, so, in the pump that makes the circulation of thermal medium oil, do not produce pump cavitation (cavitation).

The aforementioned pressure governor motion is preferably by inert gas pressurized heat medium oil.Because silicon is thermal medium oil meeting deterioration when the condition of high temperature contacts with oxygen isoreactivity gas, so, by inert gas pressurized heat medium oil, can prevent the deterioration of thermal medium oil.Aforementioned inert gas is nitrogen preferably.

In addition, inert gas preferably is accumulated in the expansion tank that is being connected with the thermal medium closed circuit by the pipe arrangement from thermal medium closed circuit branch, in aforementioned expansion tank, and inert gas pressurized heat medium oil.Preferably the aforementioned pressure governor motion is controlled at the pressure of the inert gas in the expansion tank in the preset range.Pressure regulating mechanism preferably has the inert gas controlling organization, this inert gas controlling organization, when the pressure of the inert gas in the aforementioned expansion tank is lower than first pressure, inject aforementioned inert gas to aforementioned expansion tank, when the pressure of the inert gas in the aforementioned expansion tank is higher than second pressure, from expansion tank, emit inert gas.Aforementioned first pressure is 2kPa, and aforementioned second pressure is 5kPa.

In addition, pressure setting preferably has the gas dump valve that the gas that produces in the thermal medium closed circuit is discharged.Silicon be thermal medium oil by long-time heating after, the one portion of hot is decomposed and is produced gas, so, with the gas dump valve this gas is emitted from the thermal medium closed circuit, prevent pump cavitation.This gas dump valve preferably is installed on the gas recycling can, and this gas recycling can is located in the thermal medium closed circuit, is used for reclaiming the gas that the thermal medium closed circuit produces.Preferably when the gas pressure of aforementioned gas recycling can surpasses the 3rd pressure, aforementioned gas dump valve is opened, and emits gas from the gas recycling can, after aforementioned gas dump valve is opened, when the gas pressure of gas recycling can was lower than the 4th pressure, aforementioned gas dump valve cut out.Aforementioned the 3rd pressure is 4kPa, and aforementioned the 4th pressure is 2kPa.

Have but mechanism of thermal medium oil cooling, this thermal medium oil cooling is mechanism but, and when cooling off after aforementioned pressure setting is with machined object hot pressing admittedly, the temperature of regulating thermal medium oil makes aforementioned hot plate cool off with the cooling velocity in the prescribed limit.When hot pressing is solid, the temperature of hot plate is the high temperature up to 400 ℃ sometimes, if at this state hot plate is sharply cooled off, then produces non-uniform temperature in oil hydraulic circuit, especially the flange portion thermal gradient at pipe arrangement increases, and can produce the problem that thermal medium oil leaks from sealing gasket.In addition, resin also produces thermal stress because of non-uniform temperature, and this thermal stress makes the resin forming product distortion and the dimensional accuracy of reduction formed products.Therefore, regulate the temperature of thermal medium oil, so that hot plate with the cooling velocity cooling of preset range, can be avoided the problem of steam.

Thermal medium oil cooling but mechanism preferably has bypass line, oil cooler and diaphragm valve, and aforementioned bypass line is from thermal medium oil closed circuit branch, and turns back to thermal medium oil closed circuit; Aforementioned oil cooler is located at bypass line midway, the thermal medium oil cooling that passes through bypass line but; Aforementioned diaphragm valve is installed in the upstream side of the cooler of bypass line, and adjustable throttle is to the flow of the thermal medium oil of cooler.

In addition, pressure setting can have the thermal medium oil heating unit that is used for heat hot medium oil that is disposed at the hot plate outside, the U-shaped pipe that this thermal medium oil heating unit is passed through by thermal medium oil with this U-shaped pipe be that the electric heater that coaxial mode is interspersed at least a portion in the U-shaped pipe constitutes.

According to pressure setting of the present invention, because of at the not built-in electric heater of hot plate, therefore need not Gao Re and the hot plate that moves up and down are installed high-tension distribution, do not need the mechanism that safe condition is used is held in the distribution setting.Therefore can reduce the cost of pressure setting.In addition, because of the less-restrictive of pressure setting is set, therefore the device corresponding to device user's purpose can be set easily.1 ... pressure setting 2 ... framework 3 ... fixed flat planar 4 ... movable dull and stereotyped 5 ... oil pressure cylinder 6 ... oil press fit pipe 7 ... oil pressure source 8 ... control unit 9 ... thermal insulation barriers 10 ... upside hot plate 11 ... thermal insulation barriers 12 ... downside hot plate 13 ... hot plate body 14A～14F ... through hole 15A, 15B ... through hole 16A～16F ... electric heater 17 ... transfer valve 18A～18F ... flange portion 21A～21D ... bolt 22A～22F ... distribution 23A～23F ... support component 24A～24F ... bottom outlet 25A～25G ... blocking element 26 ... entrance 27 ... outlet 28A～28F ... heating channel 29 ... thermal medium circulation pipe 30 ... pump 34 ... temperature sensor 35 ... the controllable silicon unit

The specific embodiment

Below, with reference to drawing explanation embodiments of the invention.The integral body of the pressure setting 1 of figure one expression first embodiment.As shown in the figure, in the pressure setting 1, fixing fixed flat planar 3, be provided with movable dull and stereotyped 4 at the downside of this fixed flat planar 3 at the upside position of framework 2.Should movable dull and stereotyped 4 be driven up and down by oil hydraulic cylinder 5.This oil hydraulic cylinder 5 is connected by the oil pressure source 7 of oil pressure pipe arrangement 6 and oil pressure pump etc., carries out oily supply, discharge by being located at oil pressure pipe arrangement 6 transfer valve 17 midway.The action of transfer valve 17 and oil pressure source 7 is by control module 8 controls.In figure one, omitted the distribution of these control usefulness etc.

In the aforementioned pressure setting 1, below by thermal insulation barriers 9 upside hot plate 10 is installed at fixed flat planar 3; By thermal insulation barriers 11 downside hot plate 12 is installed on movable dull and stereotyped 4.

The section of the upside hot plate 10 of figure two expression fixed flat planars 3 sides and the thermal medium closed circuit and the control circuit for heater of this hot plate.Figure three is sectional side views of aforementioned hot plate.In addition, in this hot plate, though the differences such as the direction of extrusion of upside hot plate 10, downside hot plate 12,, except downside hot plate 12 did not have temperature sensor described later, both structures were practically identical.

Shown in figure two, on the hot plate body 13 of rectangular shape, form parallel six through hole 14A～14Fs with predetermined distance at it on one side, form respectively and through hole 14A～14F orthogonal and the through hole 15A, the 15B that are communicated with in the end positions of through hole 14A～14F.Therefore, each through hole 14A～14F is interconnected by being communicated with through hole 15A, 15B in two end portions.

Insert the path electric heater 16A～16F little than its diameter respectively in aforementioned through hole 14A～14F, form the heating channel 28A～28F of ring-type section by the gap between through hole inwall and the heater peripheral part, the oily L of heating medium flows through.

The basal area of inlet 26, outlet 27, connection through hole 15A, 15B is identical.The basal area of heating channel 28A～28F also is substantially equal to inlet 26, outlet 27, is communicated with each basal area of through hole 15A, 15B, but draws than being communicated with the little of through hole 15A, 15B etc. among the figure.

Figure four and figure five expression aforementioned electric heaters are mounted to the structure on the hot plate.Among figure four and the figure five, the installation constitution of each electric heater is identical in fact, so, only represent the installation constitution part of electric heater 16C.

Among this figure, be provided with the flange portion 18C of square shape in the end of electric heater 16C, this flange portion 18C be installed on the end sides of hot plate body 13 with four bolt 21A～21D, so, electric heater 16C is fixed on the hot plate body 13., shown in figure four, sealing gasket 20C is inserted in the endless groove 19C that is formed on the flange portion 18C installed surface fixedly the time at this flange portion 18C, sealing pad 20C is clamped between hot plate body 13 and the flange portion 18C, prevent leakage of oil from through hole 14C.

Weld fixing cylindric support component 23A～23F hermetically at the other end liquid of the through hole 14A～14F of hot plate body 13, be formed with bottom outlet 24A～24F on this cylindric support component 23A～23F.The other end of each electric heater 16A～16F leaves with gap movingly in these bottom outlets 24A～24F in footpath direction and direction of principal axis.

Electric heater 16A～16F and the basal area of the basal area in gap between bottom outlet 24A～24F less than aforementioned heating channel 28A～28F arranged.That is, the size of electric heater 16A～16F commonly used, its external diameter is that 15mm, length are 900mm, perhaps external diameter is that 17.5mm, length are 900～1300mm.The internal diameter that is provided with bottom outlet 24A～24F is that the external diameter of D, electric heater 16A～16F is when being d, when operate as normal, in the thermal expansion stable status (also thermal expansion of bottom outlet at this moment) of electric heater 16A～16F, electric heater 16A～16F peripheral part with have the footpath direction poor (D-d) of bottom outlet 24A～24F to be set at 0.2mm～0.4mm.

In other words, the setting of aforementioned gap, mean that at electric heater 16A～16F etc. the size of aforementioned footpath direction poor (D-d) is the value that adds aforementioned setting difference 0.2mm～0.4mm at the external diameter of the internal diameter that bottom outlet 24A～24F is arranged and electric heater 16A～16F on the thermal expansion difference of footpath direction during for the inoperative of room temperature.

In aforementioned, in order to suppress the deviation of hot plate temperature by shortening heat medium oil L by the time in the hot plate, the flow velocity of the thermal medium in the heating channel for example is set at 3m/ second.

In order to see clearly easily in the drawings, with the size in gap (among the figure four, the state when representing electric heater 16C thermal expansion with solid line is represented state when unexpansive with double dot dash line) expression turgidly.

Except the gap of aforementioned footpath direction, between the other end front end of the end that bottom outlet 24A～24F is arranged and electric heater 16A～16F, even the heat expands state when operate as normal, the also normal generation direction of principal axis gap bigger than aforementioned radial direction gap.

As mentioned above, electric heater 16A～16F inserts through hole 14A～14F, on hot plate body 13, form heating channel 28A～28F, the two ends that are arranged in the connection through hole 15A of an end side (figure two downsides) are opening shapes, among the figure two, the opening of right part is the inlet 26 of thermal medium oil L, and the opening of left part is the outlet 27 of thermal medium oil L.

Connecting the connection through hole 15A between adjacent through hole 14A～14F, the coupling part of 15B, at one end portion's side (lower side among the figure two) and the other end side (upper side among the figure two), every the blocking element 25A～25G of two through hole welding cylindrical shapes, will be communicated with through hole 15A, 15B obturation.As a result, through hole 14A～14F is arranged in series in this order, and adjacent through hole 14A～14F is that heating channel 28A～28F alternately is connected by the connection through hole 15A of an end side and the connection through hole 15B of the other end side.

Therefore, from the 26 thermal mediums oil L that supply with that enter the mouth with heating channel 28A (from an end to the other end), the connection through hole 15B of the other end, adjacent heating channel 28B (from the other end to an end), the connection through hole 15A of one end, adjacent heating channel 28C (from the other end to an end), the connection through hole 15B of the other end, adjacent heating channel 28D (from the other end to an end), the connection through hole 15A of one end, adjacent heating channel 28E (from an end to the other end), the connection through hole 15B of the other end, the order of adjacent heating channel 28F (from an end to the other end) is crawled, and discharges from exporting 27 at last.

The end of each heater 16A～16F is outstanding laterally from flange portion 18A～18F, and the end difference wiring lead 22A～22F from this each heater 16A～16F is connected on the controllable silicon unit 35, thus but supply capability.35 controlled unit 8, controllable silicon unit are controlled as described later.Central authorities are installed with temperature sensor 34 in the other end of upside hot plate 10, are used to detect the temperature of hot plate 10, and the observed temperature signal is exported to control module 8.

Control module 8 for example is made of micro computer etc., accepts the observed temperature signal of hot plate from being installed in temperature sensor 34 on the hot plate body 13, with this observed temperature signal and predetermined hot plate temperature target temperature relatively, calculates its difference.Then, according to this difference, the required electric power amount of decision electric heater 16A～16F is exported to controllable silicon unit 35 as the required electric power output signal.

Controllable silicon unit 35 has controllable silicon, accepts the required electric power output signal from control module 8, the output of control silicon controlled.That is, with the required electric power output signal, be the electric power of the corresponding size of difference of observed temperature and target temperature from controllable silicon to electric heater 16A～16F output.At this moment, controllable silicon unit 35 supplies to the electric heater of upside hot plate 10 and the electric heater of downside hot plate 12 to aforementioned electric power.

So, can carry out the closed loop feedback control of hot plate temperature by temperature sensor 34, control module 8, controllable silicon unit 35, electric heater 16A～16F.In this FEEDBACK CONTROL, use PID (ratio, integration, differential) control etc.

Shown in figure one, connecting the outlet of pump 30 (this pump 30 is driven by electro-motor 38 by thermal medium circulation pipe 29) at the inlet 26 of hot plate body 13; In outlet 27, be connected with the suction inlet of pump 30, so, can supply with and circulating thermal medium oil L by connecting thermal medium circulation pipe 29.

In the present embodiment, thermal medium oil L is that to adopt with the dimethicone be that the silicon of main component is thermal medium oil.Even this thermal medium oil its vapour pressure in the time of 400 ℃ is also lower, only is 1.4kPa, so the withstand voltage properties of heating channel 28A～28F and thermal medium circulation pipe 29 can be low to moderate several kPa.

In addition, in order to prevent to cause because of the steam that thermal medium oil L gasification produces the cavitation erosion of pump 30, thermal medium oil L is pressurized to 2kPa.

Thermal medium circulation pipe 29 forms the branched pipe 44 towards expansion tank 40 in the upstream of pump 30 suction inlets.For the thermal medium oil that prevents high temperature with the gas reaction of oxygen isoreactivity and deterioration has been full of the nitrogen N as inert gas in expansion tank 40.In addition, expansion tank 40 has nitrogen supply pipe 40a, by the nitrogen of nitrogen supply pipe 40a suction high pressure, with thermal medium oil L pressurization.The interior pressure of expansion tank 40 is monitored by pressure sensor PG1.Nitrogen supply pipe 40a has the air-breathing valve 40b that uses, and when the interior pressure of expansion tank 40 is 2kPa when following, this is air-breathing opens with valve 40b, and nitrogen N is sucked in the expansion tank 40.In addition, on expansion tank 40, setting the nitrogen discharge pipe 40c of connection expansion tank 40 and reserve tank 42 (aftermentioned).Nitrogen discharge pipe 40c has exhaust valve 40d, and when the interior pressure of expansion tank 40 is 5kPa when above, this exhaust is opened with valve 40d nitrogen N is discharged to reserve fuel tank 42, makes the internal drop of expansion tank 40 low.Air-breathing by so controlling with valve 40b and exhaust valve 40d, the interior pressure of expansion tank 40 is remained on prescribed limit, the pressure of the oily L of thermal medium is controlled at 2kPa～5kPa.

Suction inlet upstream at pump 30 is connecting gas recycling can 39.As previously mentioned, L is pressurized to more than the vapour pressure by nitrogen N in expansion tank 40 owing to thermal medium oil, so, can not produce gas because of the gasification of thermal medium oil L, but when continuing high hot state for a long time, a part of slight heat of thermal medium oil L changes and produces gas G.Gas recycling can 39 is used to reclaim this gas G.In addition, by gas recycling can 39, can regulate the volumetric expansion of the temperature expansion generation of the thermal medium oil L in the thermal medium closed circuit.

Setting the thermal medium suction line 43 that connects gas recycling can 39 and reserve fuel tank 42 in the lower end of gas recycling can 39.In reserve fuel tank 42, storing thermal medium oil L, by the pump machanism of scheming not show, supply with thermal medium oil L by gas recycling can 39 thermotropism medium circulation pipes 29 and heating channel, and, when the maintenance pressure setting, L guides in the reserve fuel tank 42 the oil of the thermal medium in thermal medium circulation pipe 29 and the heating channel.Valve 43a use in the maintenance that midway is installed with at thermal medium suction line 43, and only when supplying with thermal mediums oil L from reserve fuel tank 42 or when reserve fuel tank 42 reclaims the oily L of thermal mediums, opens this maintenance valve 43a.

Setting the gas recovery pipe 41 that connects gas recycling can 39 and reserve fuel tank 42 in the upper end of gas recycling can 39.Gas that pressure according to gas recycling can 39 opens and closes is installed on gas recovery pipe 41 discharges and uses automatic valve 41a.That is, when gas was pressed above 4kPa, gas was discharged and is automatically opened with automatic valve 41a, and the gas G in the gas recycling can 39 are discharged to reserve fuel tank 42.After gas G was discharged from, when the gas pressure reached 2kPa, gas was discharged and is closed automatically with automatic valve 41a.So,, can prevent that gas G from entering in the thermal medium circulation pipe 29, the oil pressure of thermal medium oil L can be remained on certain limit by discharging gas G.

In addition, at the thermal medium circulation pipe 29 of outlet 27 that connects the hot plate body and gas recycling can 39 three-way mixing valve 31 is installed midway.Three-way mixing valve 31 branches into the stream that flows to branched pipe 32 to the thermal medium oil L that discharges from the outlet 27 of hot plate body and flows to the stream of gas recycling can 39, and, its flow-rate ratio can be set at arbitrary value.The thermal medium oil L that is sent to branched pipe 32 collaborates gas recycling can 39 upstream sides of thermal medium circulation pipe 29 through the oil cooler 33 in the branched pipe 32.33a is the inlet of the thermal medium oil L of oil cooler 33, and 33b is the outlet of thermal medium oil L.33c is a coolant outlet, and 33d is the cooling water inlet.During the heating of hot plate 10/add thermal control/cooling control (cooling velocity-1～-5 ℃/minute), switch mixing valve 31, so that whole thermal mediums oil L are delivered to gas recycling can 39.Cooling off side's hot plate 10 and forcibly at 12 o'clock, control module 8 is set the flow-rate ratio of three-way mixing valves 31, so that whole thermal mediums oil L are delivered to oil cooler 33.In addition, when cooling off control with the cooling velocity more than-5 ℃/minute, control module 8 is set at the value that can obtain required cooling velocity with the flow-rate ratio of three-way mixing valve 31.

Thermal medium circulation pipe 29 branches in pump 30 downstreams and the cooling control that forms the oil-in 33a that leads to oil cooler 33 are with pipe 45.With managing cooling control valve 45a is installed on 45 in cooling control.Cooling control valve 45a is the diaphragm valve that can regulate aperture, can set from the thermal medium oil L that pump 30 is discharged, do not flow to hot plate 10 and 12 and directly flow to the flow of the thermal medium oil L of cooler 33.Cooling control valve 45a can deliver to oil cooler 33 to the thermal medium oil L of the micrometeor that can not be controlled by three-way mixing valve 31, control module 8 control cooling control valve 45a, a part of thermal medium oil L is delivered to oil cooler 33, the temperature of thermal medium is slowly reduced, cool off control.

These thermal medium closed circuits, control loop all are suitable for upside hot plate 10 and downside hot plate 12, can detect the temperature of upside hot plate 10, but also can detect the temperature of downside hot plate 12.Other soft circulation circuit of branch and control loop perhaps also can be set, respectively to each hot plate detected temperatures.

The following describes the action of aforementioned pressure setting.Behind the starting pressure setting 1, pump 30 beginnings are supplied with thermal medium oil L to hot plate 10,12.Simultaneously, because temperature sensor 34 detected observed temperatures are lower than target temperature, so the observed temperature that control module 8 calculates and the difference of target temperature are big, and required electric power is sent to controllable silicon unit 35 for maximum required electric power output signal.

As a result, electric heater 16A～16F is supplied with big electric power on one side in controllable silicon unit 35, on one side electric heater is heated rapidly.By the heating of electric heater 16A～16F, the temperature of thermal medium oil L rises, and by the heat transfer from thermal medium oil L, the temperature of hot plate 10,12 also rises.

At this moment, transfer valve 31 close fork pipes 32 make the thermal medium oil L that discharges from the outlet 27 of hot plate 10,12 flow directly into the suction inlet of pump 30, send into hot plate 10,12 once more and make its circulation, and so thermal medium oil L impels the temperature of hot plate to rise.

When observed temperature became target temperature, control module 8 reduced required electric power output, and the scope that makes its size reduce～stop to be exported to controllable silicon unit 35 with required electric power output signal.So, controllable silicon unit 35 reduces the electric power of supplying with electric heater 16A～16F, surpasses target temperature within bounds.

Then, move to the control that hot plate 10,12 is remained on target temperature.That is, control module 8 is according to the difference of observed temperature and target temperature, and the size of decision required electric power amount is input to controllable silicon unit 35 as the required electric power output signal.Controllable silicon unit 35 is according to aforementioned required electric power output signal, and supply makes hot plate remain the electric power of target temperature or stops supply capability, continues FEEDBACK CONTROL.

As mentioned above, the temperature control of hot plate 10,12 is to carry out closed loop feedback control according to the difference of the observed temperature of hot plate 10 and target temperature, by controllable silicon unit 35 the electric adjustment of supply electric heater 16A～16F for the most appropriate, so, the temperature the earth that can suppress hot plate 10,12 temperature that departs from objectives.

Along with hot plate 10,12 and electric heater 16A～16F rise because of aforementioned heating temperature, have the bottom outlet 24A～24F and the electric heater 16A～16F of hot plate 10,12 produce thermal expansion, their direction of principal axis size and outside dimension increase, but when the operate as normal of temperature stabilization, it expands stable and becomes certain state.

At this moment, the direction of principal axis thermal expansion amount of electric heater 16A～16F when the direction of principal axis gap that bottom outlet 24Aa～24Fa is arranged of the other end front end of electric heater 16A～16F and support component 23A～23F is redefined for and stablizes greater than thermal expansion, so, can not contact between them and breakage.

In addition, expand in aforementioned hot and also guarantee to have minim gap when stablizing in direction gap, footpath between the other end external diameter of the internal diameter of bottom outlet 23A～23F and electric heater 16A～16F, even thermal medium oil L flows in heating channel 28A～28F, with the two ends of electric heater 16A～16F are compared fixedly the time, can suppress the vibration of electric heater 16A～16F.

Test according to the present inventor, electric heater 16A～16F is external diameter 15mm, the length 900mm that adopts common usefulness, or the size of external diameter 17.5mm, length 900mm～1300mm, the flow velocity of thermal medium is that 3m/ is during second, when the difference gap of bottom outlet inside diameter D and heater outside diameter d (D-d) was 0.2mm～0.4mm, durability was best.

On the other hand,, the basal area of heating channel 28A～28F equals the basal area that enters the mouth, export substantially because being set at, so, when the heating of hot plate, flow velocity in the hot plate is a certain speed, and the surface heat transmission is also certain, hot plate can be remained stable Temperature Distribution.

With the stipulated time with resin hot pressing solid after, carry out the cooling of hot plate.In the present embodiment, the temperature of the hot plate 10,12 when consolidating owing to hot pressing is 400 ℃ a high temperature, so, if hot plate is sharply cooled off, then produce the temperature inequality in the thermal medium closed circuit, especially when the flange portion thermal gradient of pipe arrangement was big, thermal medium oil L flowed out from sealing gasket easily.In addition, also Yin Wendu is uneven and produce thermal stress on the resin, and this thermal stress makes the resin forming product distortion, reduces the dimensional accuracy of formed products.Therefore, hot plate 10,12 should be with 1～5 ℃/minute cooling velocity cools down.

Control module 8 makes controllable silicon unit 35 not to electric heater 16A～16F supply capability to controllable silicon unit 35 output required electric power output signals.In addition, control module 8 is set the aperture of cooling control valve 45a, and the cooling velocity that makes hot plate 10,12 reduces the temperature of thermal medium oil L within the limits prescribed.After hot plate temperature reaches 250 ℃,, cool off control with three-way mixing valve 31 with the speed more than-5 ℃/minute.

Figure six is another embodiment of hot plate, and expression further strengthens heating, the pressurization area of hot plate, increases the situation of electric heater radical.

Among figure two embodiment, be that its circulating resistance is big, and in the present embodiment, is that many adjacent heating channels are disposed side by side, is that unit carries out arranged in series with these heating channels that disposing side by side with one one simple arranged in series in ground of each heating channel.

That is, among this figure, at the two ends of hot plate body 13, what form an end obturation has bottom outlet 14a, a 14j, is provided with eight through hole 14b～14h between them.Have on bottom outlet and the through hole 14b～14i at these, through hole 15A, a 15B who is communicated with an end (downside of figure six) and the other end (upside of figure six) with their straight intersecting and merging respectively is set.

The connection through hole 15A of an aforementioned end, both ends open portion at this connection through hole 15A is provided with blocking element 25a, 25i respectively, be provided with columned blocking element 25c, 25e, 25g in the part between through hole 14a～14b, between through hole 14e～14f, between through hole 14i～14j, they weld with being sealed and are fixing.

Similarly, the connection through hole 15B of the other end, both ends open portion at this connection through hole 15B is provided with blocking element 25b, 25h respectively, between through hole 15c～14d, be respectively equipped with columned blocking element 25d, 25f between through hole 14g～14h, they weld with being sealed and are fixing.

Have bottom outlet 14a, 14j one open-ended be the opening shape, respectively as the inlet 26 and the outlet 27.

Respectively insert an electric heater 16A～16H respectively in aforementioned 8 through hole 14b～14i, the gap between these through hole inwalls and the electric heater periphery constitutes heating channel 28a～28h that heating medium flows through.

The inlet 26, the outlet 27, bottom outlet 14a, 14j, connection through hole 15A, 15B are arranged, their basal area is set at about twice of the basal area of heating channel 28a～28h.

Electric heater 16A～16H, be fixed on an end sides of hot plate 13 by the flange portion 18A that is fixed on one end end～18H with the state of holding sealing gasket under the arm, insert in bottom outlet 24A～24H of support component 23A～23H (this support component 23A～23H is welded on the other end part of through hole 14b～14i hermetically) other end end.The other end of electric heater 16A～16H and have between bottom outlet 24A～24H gapped in footpath direction and direction of principal axis.Similarly when the stable operate as normal of thermal expansion, the footpath direction of the 0.2mm～0.4mm that has an appointment is poor for these gaps and figure two, figure four illustrated embodiments, and, at direction of principal axis bigger gap is arranged also.

Therefore, in the thermal medium closed circuit of the hot plate of aforementioned formation, the thermal medium oil L that flows into from the opening that bottom outlet 14a is arranged flows to the other end, enter the connection through hole 15B of the other end, flow through two heating channels of configuration side by side circuitously, behind a distolateral connection through hole 15A, arriving from the connection through hole 15B of the other end has bottom outlet 14j, flows out from exporting 27 again.

Promptly, from the thermal medium oil L that enters the mouth 26, has bottom outlet 14a to flow into from big footpath, connection through hole 15B shunting by the other end, flow to the other end of two heating channel 28a, 28b, heated by electric heater 16A, 16B on one side at this, flow to the end of heating channel 28a, 28b on one side, at one end behind the interflow, the connection through hole 15A place of portion, shunted once more, flow into two heating channel 28c and 28d, on one side by electric heater 16C, 16D heating, from the end of heating channel 28c, 28d flow to the other end on one side.Similarly, arrived the thermal medium oil L of the other end, after being communicated with through hole 15B interflow, shunted once more, flow to two heating channel 28e, 28f, flow, be heated on one side to an end from their one side on one side, at one end shunting again behind the connection through hole 15A of the portion interflow is heated when the end from two heating channel 28g, 28h flows to the other end.Thermal medium oil L has bottom outlet 14j in the other end of heating channel 28g, 28h by being communicated with through hole 15B arrival, discharges from the outlet 27 of hot plate body 13 again.

Among this embodiment, with big hot plate area accordingly, the electric heater number also increases than aforementioned initial embodiment, but, because two two ground of heating channel (basal area of this heating channel only is to be communicated with through hole 15A, 15B, inlet 26, outlet 27 about 1/2nd times) are disposed side by side, thermal medium oil L is flow through being communicated with between through hole 14A, 15B, so, compare with arranged in series of each heating channel the time, can reduce flow path resistance.In addition, because the basal area that the basal area altogether of the heating channel that is disposing side by side is set at and enters the mouth, exports is about equally, so, when the heating of hot plate, flow velocity is certain speed in the hot plate, and the surface heat transmission is also certain, hot plate can be remained more stable Temperature Distribution.

And, because the basal area of a heating channel is set at about 1/2nd of inlet 26, outlet 27, bottom outlet 14a, 14j, connection through hole 15A, 15B, so, flow through the flow of the thermal medium oil L of each heating channel, equal to enter the mouth 26 with the basal area of heating channel, outlet compared in 27 o'clock, as long as thermal medium in the hot plate can alleviate the operating cost when heating a small amount of.

In addition, in the embodiments of the invention, be that temperature sensor 34 is located on the upside hot plate 10, but also can be located on the downside hot plate 12.In addition, also can on the hot plate temperature sensor be set all up and down, control the electric heater of each hot plate up and down independently.At this moment, though height when the cost ratio is provided with a temperature sensor can be controlled accurately to the different conditions of each hot plate.

It constitutes the pressure setting of above-mentioned first embodiment in the heating channel in being formed at hot plate and is embedded electric heater, but, the present invention has more than the formation that is defined in the foregoing description, and it also can constitute the formation that the device of thermal medium oil heating usefulness is disposed at the hot plate outside.The pressure setting of this kind formation is described according to a second embodiment of the present invention.According to the pressure setting of the second embodiment of the present invention, because of not built-in electric heater in the hot plate, therefore need on the hot plate of high temperature and start up and down, high-tension distribution be installed, do not need distribution is arranged to the mechanism of safe condition yet.Therefore can reduce the cost of pressure setting.Again, when pressure setting was set, its less-restrictive was so can easily be provided with the device of the purpose that can meet the user.

Figure seven is the figure of integral body of the pressure setting 1000 of the second embodiment of the present invention, system's mark was with identical symbol when again, device in its employed various devices and element and the aforementioned first embodiment of the present invention and element were identical in the present embodiment of following explanation.In this figure, pressure setting 1000 is being fixed fixed flat planar 3 at the upside position of framework 2, and the downside in this fixed flat planar 3 is provided with movable dull and stereotyped 4 simultaneously.This movable flat board 4 is to form the state of start up and down by oil hydraulic cylinder 5.Aforementioned oil hydraulic cylinder 5 is connected to the oil pressure source 7 of oil pressure pump etc. by oil pressure pipe arrangement 6, and is carried out the supply and the discharging of oil by the transfer valve midway 17 that is arranged at oil pressure pipe arrangement 6.Transfer valve 17 and oil pressure source 7 are carried out the control of its start by control module 8.In figure seven, omit the distribution describe aforementioned control usefulness etc. again.

On above-mentioned pressure setting 1000, clip thermal insulation barriers 9 in the lower surface of fixed flat planar 3 upside hot plate 1010 is installed, again, clip thermal insulation barriers 11 at movable dull and stereotyped 4 upper surface downside hot plate 1012 is installed.

Figure eight is the figure of the control circuit of the thermal medium closed circuit of the section of the upside hot plate 1010 that discloses fixed flat planar 3 sides and this hot plate and heater.Again, this hot plate, though its upside hot plate 1010 is different with downside hot plate 1012 press direction, still, except that downside hot plate 1012 did not have temperature sensor described later, both were essentially identical formation.

Shown in figure eight, on the hot plate body 1013 of rectangular shape, be formed with certain interval at interval and be parallel to its six through hole 1014A～1014F on one side, and on the position of the both end sides of through hole 1014A～1014F, be formed with respectively connection through hole 1015A, 1015B perpendicular to aforementioned through hole 1014A～1014F, therefore, each through hole 1014A～1014F is connected by being communicated with through hole 1015A and 1015B on two end portions.

At this, being communicated with through hole 1015A, 1015B is identical with the basal area of through hole 1014A～1014F.

On the both end sides of the through hole 1014A～1014F of hot plate body 1013, be welded with columned supporting element 1023A～1023F and 1123A～1123F again, liquid sealing.

In above-mentioned formation, the flow velocity of the thermal medium in its heating channel is set for and is made thermal medium oil L pass through the interior time of hot plate for shorter, and can suppress the uneven phenomenon of hot plate temperature, for example is set at 3m/ about second.

The two ends that are arranged in the connection through hole 1015A of one end (figure eight is downside) are set as the opening shape.Among the figure eight, the opening of right-hand member becomes the inlet 1026 of thermal medium oil L, and the opening of left end becomes the outlet 1027 of thermal medium oil L.

Again, at the connection through hole 1015A that connects between adjacent through hole 1014A～1014F, to weld obturation in the mode at two at interval in an end (lower side among the figure eight) and the other end (upper side among the figure eight) columned blocking element 1025A～1025G is arranged on the coupling part of 1015B.Its result, through hole 1014A～1014F order according to this in series are configured, and adjacent through hole 1014A～1014F alternately is connected with the connection through hole 1015B of the other end by the connection through hole 1015A of an end.

Therefore, the thermal medium oil L that supplies with from inlet 1026 passes through with through hole 1014A (distolateral distolateral towards another from one), the connection through hole 1015B that another is distolateral, adjacent through hole 1014B (distolateral distolateral) towards one from another, one distolateral connection through hole 1015A, adjacent through hole 1014C (distolateral distolateral) towards another from one, the connection through hole 1015B that another is distolateral, adjacent through hole 1014D (distolateral distolateral) towards one from another, one distolateral path through hole 1015A, through hole 1014E (distolateral distolateral) towards another from one, the path through hole 1015B that another is distolateral, the heating channel inside that the order of adjacent through hole 1014F (distolateral distolateral towards another from) is crawled, last from exporting 1027 discharges.

Again, centre is equipped with temperature sensor 1034 in the other end of upside hot plate 10, in order to the temperature of detection hot plate 1010, and the observed temperature signal can be exported to control module 8.

Shown in figure seven, the discharge opening that on the inlet 1026 of hot plate body 1013, connects the pump 30 that is driven by electro-motor 38 by thermal medium circulation pipe 29, and in outlet 1027, connect thermal medium circulation pipe 29 and the mode that is connected to the suction inlet of pump 30 makes thermal medium oil L supply capable of circulation.

Again, in present embodiment, using with dimethicone as thermal medium oil L is thermal medium oil as the silicon of principal component.When even this thermal medium oil temperature is 400 ℃ its vapour pressure be 1.4kPa for very low, so the withstand voltage properties of heating channel and thermal medium circulation pipe 29 can be lower several kPa degree.

Again, cause pump 30 to produce the pump cavitation phenomenon for preventing the steam that thermal medium oil L gasification is produced, this thermal medium oil L is pressurized to 2kPa.

Be formed with branched pipe 44 towards expansion drum 40 in the upstream of the suction inlet of the pump 30 of thermal medium circulation pipe 29.Make thermal medium oil produce degradation phenomena for the active gases of the thermal medium oil that prevents high temperature and oxygen etc. produces reaction, be full of nitrogen N in the aforementioned expansion drum 40 as inert gas.Again, expansion drum 40 has nitrogen supply pipe 40a, and can be with the pressurization of thermal medium oil by the nitrogen that is taken into high pressure through nitrogen supply pipe 40a.Again, the interior pressure of expansion drum 40 is monitored by pressure sensor PG1.Aforementioned nitrogen supply pipe 40a has air inlet valve 40b, presses to 2kPa in the expansion drum 40 and nitrogen N is taken in the expansion drum 40 with valve 40b by opening this air inlet when following.On expansion drum 40, be equipped with the nitrogen discharge pipe 40c that expansion drum 40 and servo jar of 42 (aftermentioneds) is done binding.And this nitrogen discharge pipe 40c has exhaust valve 40d, and when the interior pressure of expansion drum 40 was above above 5kPa, aforementioned exhaust was opened with valve 40d and nitrogen N is expelled to servo jar 42 and makes the internal drop of expansion drum 40 low.So, when controlling aforementioned air inlet and with valve 40d the interior pressure of expansion drum 40 being remained in certain scope, the pressure of thermal medium oil L can be controlled between 2kPa～5kPa with valve 40b and aforementioned exhaust.

Upstream at the suction inlet of pump 30 is connecting gas recycling can 39.As described above, thermal medium oil L is forced into more than the vapour pressure with nitrogen N expansion drum 40 in, though therefore can not produce the gas that thermal medium oil L gasification is generated, when being continuously high hot state for a long time, the part generation thermal change of thermal medium oil L and generate gas G.Gas recycling can 39 reclaims this gas G.Again, the Volume Changes that temperature expansion produced by the thermal medium in gas recycling can 39 adjustable heat medium circulation loops oil L.

Again, the thermal medium that is equipped with in the lower end of gas recycling can 39 gas recycling can 39 and servo jar 42 binding is taken into pipe 43.Storage has thermal medium oil L in servo jar 42, it supplies with thermal medium oil L by the pump installation that is not shown by figure via 39 pairs of thermal medium circulation pipes 29 of gas recycling can and heating channel, and when the maintenance of pressure setting the oil of the thermal medium in thermal medium circulation pipe 29 and heating channel L is drawn to servo jar 42.Again, valve 43a use in the maintenance that midway is equipped with that is taken into pipe 43 at thermal medium, and it is only in when supplying with thermal mediums oil L for servo jar 42 or thermal medium oil L is recycled to servo jar should keeps in repair with valve 43a in 42 o'clock and open.

Be equipped with in the upper end of gas recycling can 39 gas recycling can 39 and servo jar 42 gas recovery pipe 41 that links again.The gas discharge automatic valve 41a that opens and closes corresponding to the gas pressure of gas recycling can 39 is installed on this gas recovery pipe 41.That is, this gas discharge is automatically opened with automatic valve 41a system and the gas G in the gas recycling can 39 is disposed to servo jar 42 when gas pressure surpasses 4kPa.Aforementioned gas is discharged and is closed automatically with automatic valve 41a when making gas pressure arrive 2kPa when discharging gas G.So, the formation through plant getting rid of gas G thus can prevent that gas G from entering thermal medium circulation pipe 29 in and the oil pressure of the oily L of thermal medium can be remained in certain scope.

In addition, at the thermal medium circulation pipe 29 of the outlet 1027 of hot plate body and the binding usefulness of gas recycling can 39 three-way mixing valve 31 is installed midway.Thermal medium that this three-way mixing valve 31 will be given off from the outlet 1027 of hot plate body oil L is branched off into towards the shunting of the first branched pipe 32a and shunting towards the second branched pipe 32b, and flow-rate ratio can be set for value arbitrarily.

The thermal medium oil L that is sent to the first branched pipe 32a collaborates in the upstream side of the gas recycling can 39 of thermal medium circulation pipe 29 through the oil cooler 33 among the first branched pipe 32a.33a is the inlet of the thermal medium oil L of oil cooler 33, and 33b is the outlet of thermal medium oil L, and 33c is the outlet of cooling water, and 33d is the inlet of cooling water.In addition, the thermal medium oil L that is sent to the second branched pipe 32b collaborates to the upstream side of the gas recycling can 39 of thermal medium circulation pipe 29 through the thermal medium oil heating unit 1200 on the second branched pipe 32b.

In addition, thermal medium circulation pipe 29 branches in the downstream of pump 30 and becoming towards the cooling of the oil-in of oil cooler 33 33a control with pipe 45.With managing cooling control valve 45a is installed on 45 in cooling control.This cooling control is the diaphragm valves that can adjust its aperture with valve 45, its can set among the thermal medium oil L that self-pumping 30 gives off not towards hot plate 1010 (1012) and directly towards the flow of the oily L of thermal medium of oil cooler 33.Cooling control valve 45a can be sent to oil cooler 33 with the thermal medium oil L of 31 out of contior tiny flow quantities of aforementioned three-way mixing valve.

Again, these thermal medium closed circuits and control circuit become shared in upside hot plate 1010 sides and downside hot plate 1012 sides, though it is the temperature that detects upside hot plate 1010, but also can detect the temperature of downside hot plate 12, perhaps also can detect the temperature of each hot plate individually and other thermal medium closed circuit and control circuit are set.

The thermal medium oil heating unit 1200 of present embodiment is disclosed among figure nine and the figure ten.Figure ten is the C-C sectional drawing of figure nine.This thermal medium oil heating unit 1200 has front four the heating unit 1250A～1250D of total that the summary U font of shape constitutes that are considered as growing crosswise, and for up and down two-layer and about be two sections.Each its summary of heating unit 1250A～1250D constitutes has the U-shaped pipe 1252 and the electric heater 1230 that is through in this U-shaped pipe 1252 that internal circulation has the summary U font of thermal medium body.Again, these four heating unit 1250A～1250D are overmolding to the state that is contained in fully in the heat shield 1256.Again, the both ends of U-shaped pipe 1252 are set as from the outstanding toward the outer side respectively apperance in the both ends of second pipe 54.

At this, U-shaped pipe 1252 is by first and second straight line portion 1252a, 1252b with first and second straight line portion 1252a, the circular-arc elbow part 1252c that each leading section of 1252b links mutually constitutes.Again, electric heater 1230 lays respectively at first and second straight line portion 1252a of each U-shaped pipe 1252, in the 1252b, and is respectively slightly coaxial shape, and forms the apperance that extends into the U font.Again, each electric heater 1230 is fixed in each end of U-shaped pipe 1252, the further outstanding outside of its each base end part, and be installed into certainly in the termination rack 1258 of the state that is adjacent to heat shield 1256 and extend.Termination rack 1258 connects controllable silicon unit 1035 (with reference to the 7th figure).Controller 8 is controlled aforementioned controllable silicon unit 1035 and then is controlled the caloric value of each electric heater 1230.

Thus, heat transfer area as heat exchanger is very sufficient, except that can realizing certain heating action, because of have an electric heater 1230 in U-shaped pipe 1252, also can be narrowed by the area of section of U-shaped pipe 1252 that the thermal medium body is passed through is the interior reserve (accommodating volume) that can reduce the thermal medium body in the U-shaped pipe 1252.Its result can improve the thermal efficiency, and can reduce energy-output ratio.Thus, can make the energy charge minimizing and can improve its economy again.

A plurality of shock absorbers 1260 are installed on the outer peripheral face of each electric heater 1230, and these shock absorbers 1260 form the apperance of the inner peripheral surface that is connected to U-shaped pipe 1252, by this, and the vibration of the electric heater 1230 when it can prevent thermal medium oil flow.

In addition, shown in figure ten, heating unit 1250A above being positioned at, linking first on the outer peripheral face of the outstanding end of the first straight line portion 1252a of the top of each U-shaped pipe 1252 of 1250C respectively and linking pipe 1264, these first link pipe 1264 after first concetrated pipe, 1266 places set, are connected to the second branched pipe 32b toward gas recycling can 39.Again, be positioned at the heating unit 1250B of below, linking second on the outer peripheral face of the outstanding end of the second straight line portion 1252b of the below of each U-shaped pipe 1252 of 1250D respectively and linking pipe 1268, these second link pipe 1268 in the second branched pipe 32b that are connected to towards tripartite branch valve after second concetrated pipe, 1270 places set.

At this, be positioned at the heating unit 1250A of top, the outstanding end of the second straight line portion 1252b of the below of each U-shaped pipe 1252 of 1250C and the heating unit 1250B that is positioned under it, the outstanding end of the first straight line portion 1252a of the top of each U-shaped pipe 1252 of 1250D link pipe 1272 by the 3rd and are connected.

Below explanation has hot plate 1010 on the pressure setting of above-mentioned formation and 1012 heating cooling action.

When hot plate 1010 and 1012 was forced cooling, control module 8 control controllable silicon unit 1035 and stop heater 1130 is transmitted electric power were set the flow-rate ratio of three-way mixing valve 31 simultaneously and thermal medium oil L all are sent to cooler 33.In addition, when cooling off control more than the cooling velocity-5 ℃/minute, control module 8 control controllable silicon unit 1035 are set at appropriate value with the caloric value of heater 1230, and set the flow-rate ratio of three-way mixing valve 31 for can obtain desired cooling velocity value.When the heating of hot plate 1010/add thermal control/cooling control (cooling velocity-1～-5 ℃/minute), three-way mixing valve 31 done to switch make that thermal medium oil L's all be sent to the second branched pipe 32b again.And in when heating and when adding thermal control, control module 8 returns feedback according to the testing result of temperature sensor 1034 (figure eight) to the caloric value of heater 1230 and controls.On the one hand, during cooling control (cooling velocity-1～-5 ℃/minute), control module 8 stops heater 1230 and according to the detecting that the result controls cooling control valve 45a (figure seven) of temperature sensor 1034 some of thermal medium oil L is sent to cooler 33, and the temperature of thermal medium is gently reduced.

As mentioned above, be heated or the thermal medium oil that is cooled is circulated in the heating channel that is formed in hot plate 1010 and the hot plate 1012 by the effect of pump 30, and the temperature of control hot plate 1010 and hot plate 1012.

As above-mentioned, in present embodiment because of being to make the axial formation of thermal medium oil flow in heater 1230, therefore thermal medium oil is not subject to the opposing influence of heater 1230, the flow velocity of the thermal medium oil in the thermal medium oil heating unit 1200 can be remained in the degree of 4.5m/s and simultaneously to the heating of thermal medium oil.Even its result in the occasion that thermal medium oil is heated to 400 ℃ degree, also can suppress the border film temperature between heater 1230 and thermal medium oil in below 405 ℃, and can prevent the hot deterioration of the thermal medium oil around the heater 1230.

The present invention is not the formation that only is defined in the foregoing description, can carry out various modification in the scope that does not break away from main idea of the present invention.

The thermal medium oil heating unit 1201 of this kind modified example is shown in figure 11.In this example, electric heater 1231 lays respectively at first and second straight line portion 1252a of each first body 1252, in the 1252b, and is respectively slightly coaxial shape, and forms and extend into the so-called shaft-like of linearity.In other words, electric heater 1231 is configured to remove circular-arc sweep 1252c.Its formation simply and was easily organized in the thermal medium heater when electric heater 1231 of this kind shape compared with the electric heater of aforesaid U-shaped 1230, but the cost of reducing apparatus integral body.

The effect of invention

As previously mentioned, according to pressure setting of the present invention, even it is that forming temperature is when being very high resin, because of it can suppress the vapour pressure of low thermal medium oil, so must not increase substantially the withstand voltage properties that the pipe arrangement of pressure setting is in the processing and forming thing that is formed.

According to pressure setting of the present invention,,, do not need distribution is configured to the mechanism that safe shape is used so need high-tension distribution be installed at the hot plate of high temperature and start up and down because of not built-in electric heater in the hot plate again.Therefore can reduce the cost of pressure setting.Again, because of the less-restrictive of pressure setting is set, so can easily proper device be set according to must asking of device user.

Description of drawings

Figure one is the figure of the pressure setting integral body of the expression first embodiment of the present invention.

Figure two is the section of the hot plate in the presentation graphs one and the figure of control circuit thereof.

Figure three is local section side views of the hot plate looked of the III-III direction from figure two.

Figure four is the electric heater in the presentation graphs two and the sectional drawing of mounting portion thereof enlargedly.

Figure five is side views of the flange portion mounting portion of the electric heater among the figure four.

Figure six is another routine front sectional drawings of the hot plate of first embodiment.

Figure seven is figure of integral body of the pressure setting of the second embodiment of the present invention.

Figure eight is the section of the hot plate among the figure seven and the figure of control circuit thereof.

Figure nine is the figure of integral body of the thermal medium oil heating unit of the second embodiment of the present invention.

The part cross-section side view of the thermal medium oil heating unit that figure ten watches for the C-C direction in figure nine.

Figure 11 is the figure of integral body of another example of the thermal medium oil heating unit of the second embodiment of the present invention.

Claims (67)

1. pressure setting, between the pair of plates of can be approaching, separating, hot plate is set, by the thermal medium oil that is installed on the heater on the hot plate and be circulated in the thermal medium oil circulation stream that comprises in the heating channel that is formed at the aforementioned hot intralamellar part aforementioned hot plate is heated, it is characterized in that: aforementioned hot medium oil is that silicon is thermal medium oil.

2. pressure setting as claimed in claim 1 is characterized in that: the principal component of aforementioned hot medium oil is a dimethicone.

3. pressure setting as claimed in claim 1 or 2 is characterized in that: aforementioned pressure setting can be heated to 350～450 ℃ with aforementioned hot plate.

4. pressure setting as claimed in claim 1 is characterized in that: aforementioned pressure setting has the pressure regulation device in the prescribed limit more than the vapour pressure that the pressure of aforementioned hot medium oil can be maintained at aforementioned hot medium oil.

5. pressure setting as claimed in claim 4 is characterized in that: the aforementioned pressure adjusting device is by inert gas pressurization aforementioned hot medium oil.

6. pressure setting as claimed in claim 5 is characterized in that: aforementioned inert gas is a nitrogen.

7. as claim 5 or 6 described pressure settings, it is characterized in that: aforementioned inert gas via the pipe arrangement that in aforementioned hot medium circulation loop, branches out accumulate in the consecutive expansion drum in aforementioned hot medium circulation loop in, in aforementioned expansion drum, aforementioned indifferent gas system pressurization aforementioned hot medium oil.

8. pressure setting as claimed in claim 7 is characterized in that: the aforementioned pressure governor motion is controlled at the pressure of the inert gas in the expansion tank in the prescribed limit.

9. pressure setting as claimed in claim 8, it is characterized in that: the aforementioned pressure governor motion has the inert gas controlling organization, when this inert gas controlling organization is lower than first pressure when the pressure of the inert gas in the aforementioned expansion tank, inject aforementioned inert gas to aforementioned expansion tank, when the pressure of the inert gas in the aforementioned expansion tank is higher than second pressure, from expansion tank, emit inert gas.

10. pressure setting as claimed in claim 9 is characterized in that: aforementioned first pressure is 2kPa, and aforementioned second pressure is 5kPa.

11. pressure setting as claimed in claim 1 is characterized in that: aforementioned pressure setting has the gas dump valve that the gas that produces in the thermal medium closed circuit is discharged.

12. pressure setting as claimed in claim 11 is characterized in that: aforementioned gas dump valve is installed on the gas recycling can, and this gas recycling can is located in the thermal medium closed circuit, is used to reclaim the gas that produces in the thermal medium closed circuit.

13. pressure setting as claimed in claim 12, it is characterized in that: when the gas pressure of aforementioned gas recycling can surpasses the 3rd pressure, aforementioned gas dump valve is opened, from the gas recycling can, emit gas, after aforementioned gas dump valve is opened, when the gas pressure of gas recycling can was lower than the 4th pressure, aforementioned gas dump valve cut out.

14. pressure setting as claimed in claim 13 is characterized in that: aforementioned the 3rd pressure is 4kPa, and aforementioned the 4th pressure is 2kPa.

15. pressure setting, between the pair of plates of can be approaching, separating, hot plate is set, by the thermal medium oil that is installed in the heater on the hot plate and in comprising the thermal medium oil closed circuit of the heating channel that is formed at the aforementioned hot intralamellar part, circulates, with aforementioned hot plate heating, it is characterized in that: have but mechanism of thermal medium oil cooling, this thermal medium oil cooling but mechanism at aforementioned pressure setting with machined object hot pressing when cooling back admittedly, be used to regulate the temperature of thermal medium oil, aforementioned hot plate is cooled off with the cooling velocity in the preset range.

16. pressure setting as claimed in claim 15 is characterized in that: aforementioned hot medium oil cooling but mechanism has bypass line, oil cooler and diaphragm valve,

Aforementioned bypass line is from thermal medium oil closed circuit branch, and turns back to above-mentioned thermal medium oil closed circuit;

Aforementioned oil cooler is located in the way of aforementioned bypass line, the thermal medium oil cooling that passes through aforementioned bypass line but;

Aforementioned diaphragm valve is installed in the cooler upstream side of aforementioned bypass line, and adjustable throttle is to the flow of the thermal medium oil of cooler.

17. the control method of a pressure setting, the pressure setting of this control method control is: between the pair of plates of can be approaching, separating hot plate is set, in the heater and the inner heating channel that forms of hot plate that are installed on the hot plate, by the thermal medium oil that circulates in comprising the thermal medium oil closed circuit of this heating channel aforementioned hot plate is heated, it is characterized in that: aforementioned hot medium oil is that employing silicon is thermal medium oil.

18. the control method of pressure setting as claimed in claim 17 is characterized in that: aforementioned hot medium main body of oil is a dimethicone.

19. the control method as claim 17 or 18 described pressure settings is characterized in that: when machined object is consolidated in aforementioned pressure setting hot pressing, aforementioned hot plate can be heated to 350～450 ℃.

20. the control method of pressure setting as claimed in claim 17 is characterized in that: in the aforementioned control method, the pressure of thermal medium is remained in the prescribed limit more than the vapour pressure of thermal medium oil.

21. the control method of pressure setting as claimed in claim 20 is characterized in that: in the aforementioned control method, by inert gas pressurized heat medium oil.

22. the control method of pressure setting as claimed in claim 21 is characterized in that: aforementioned inert gas is to adopt nitrogen.

23. control method as claim 21 or 22 described pressure settings, it is characterized in that: aforementioned inert gas is accumulated in the expansion tank that is being connected with thermal medium body closed circuit by the pipe arrangement from thermal medium closed circuit branch, in the aforementioned control method, in aforementioned expansion tank by inert gas pressurization aforementioned hot medium oil.

24. the control method of pressure setting as claimed in claim 23 is characterized in that: aforementioned control method is controlled at the pressure of the aforementioned inert gas in the expansion tank in the prescribed limit.

25. the control method of pressure setting as claimed in claim 24, it is characterized in that: aforementioned control method, when the inert gas pressure in the expansion tank is lower than first pressure, inert gas injecting in expansion tank, when the inert gas pressure in the expansion tank is higher than second pressure, from expansion tank, emit inert gas.

26. the control method of pressure setting as claimed in claim 25 is characterized in that: aforementioned first pressure is 2kPa, and aforementioned second pressure is 5kPa.

27. the control method of pressure setting as claimed in claim 17 is characterized in that: aforementioned control method, control gas dump valve is to discharge the gas that produces in the soft circulation circuit.

28. the control method of pressure setting as claimed in claim 27 is characterized in that: aforementioned gas dump valve is installed on the gas recycling can, and this gas recycling can is located in the thermal medium closed circuit, is used to reclaim the gas that produces in the thermal medium closed circuit.

29. the control method of pressure setting as claimed in claim 28, it is characterized in that: aforementioned control method, when the gas pressure of gas recycling can surpasses the 3rd pressure, open aforementioned gas dump valve, from the gas recycling can, emit gas, after the gas dump valve is opened, when the gas pressure of gas recycling can is lower than the 4th pressure, close aforementioned gas dump valve.

30. the control method of pressure setting as claimed in claim 29 is characterized in that: aforementioned the 3rd pressure is 4kPa, and aforementioned the 4th pressure is 2kPa.

31. the control method of a pressure setting, it is characterized in that: the pressure setting that this control method is controlled is: between the pair of plates of can be approaching, separating hot plate is set, at the heater and the inner heating channel that forms of hot plate that are installed on the hot plate, by the thermal medium oil that in comprising the thermal medium oil closed circuit of this heating channel, circulates aforementioned hot plate is heated, when cooling off behind the solid machined object of aforementioned pressure setting hot pressing, regulate the temperature of thermal medium oil, so that aforementioned hot plate is with the cooling velocity cooling of prescribed limit.

32. control method as 31 described pressure settings of claim the, it is characterized in that: by controlling the temperature that oil cooler and diaphragm valve are regulated aforementioned hot medium oil, aforementioned oil cooler is located in the bypass pipe road that returns the thermal medium closed circuit from the thermal medium closed circuit after the branch, and thermal medium oil cooling that will be by bypass line but; Aforementioned diaphragm valve is installed in the oil cooler upstream side of bypass line, and adjustable throttle is to the aforementioned hot medium oil flow of oil cooler.

33. pressure setting, can be approaching, between the pair of plates of separating hot plate is set, at the heater and the inner heating channel that forms of hot plate that are installed on the hot plate, by the thermal medium oil that in comprising the thermal medium oil closed circuit of this heating channel, circulates aforementioned hot plate is heated, it is characterized in that: aforementioned pressure setting has and is disposed at aforementioned hot plate outside and is used for thermal medium oil heating unit with the oil heating of aforementioned hot medium, and this thermal medium oil heating unit has in the U-shaped pipe of circulation aforementioned hot medium oil and at least a portion in aforementioned U-shaped pipe and penetrates electric heater coaxially with aforementioned U-shaped pipe.

34. pressure setting as claimed in claim 33, wherein the aforementioned electric heater spreads all over this U-shaped pipe and is threaded into universally in this U-shaped pipe.

35. pressure setting as claimed in claim 33, wherein aforementioned electric heater system only penetrates in the straight line portion of aforementioned U-shaped pipe.

36. as each described pressure setting in the claim 33 to 35, it is characterized in that: aforementioned U-shaped pipe is covered by the cover cap of thermal insulation.

37. pressure setting as claimed in claim 33 is characterized in that: aforementioned hot medium oil is that silicon is thermal medium oil.

38. as claim the 37 described pressure settings, it is characterized in that: aforementioned hot medium main body of oil is a dimethicone.

39. as claim the 37 described pressure settings, it is characterized in that: aforementioned pressure setting can be heated to 350～450 ℃ with aforementioned hot plate.

40. pressure setting as claimed in claim 33 is characterized in that: aforementioned pressure setting has the pressure regulation device in the prescribed limit more than the vapour pressure that pressure with aforementioned hot medium oil remains on thermal medium oil.

41. pressure setting as claimed in claim 40 is characterized in that: the aforementioned pressure adjusting device is by inert gas pressurized heat medium oil.

42. pressure setting as claimed in claim 41 is characterized in that: aforementioned inert gas is a nitrogen.

43. as claim 41 or 42 described pressure settings, it is characterized in that: aforementioned inert gas is accumulated in the expansion tank that is being connected with thermal medium body closed circuit by the pipe arrangement from thermal medium closed circuit branch, and in aforementioned expansion tank by inert gas pressurization aforementioned hot medium oil.

44. pressure setting as claimed in claim 43 is characterized in that: the aforementioned pressure adjusting device is controlled at the pressure of the aforementioned inert gas in the expansion tank in the prescribed limit.

45. pressure setting as claimed in claim 44, it is characterized in that: the aforementioned pressure adjusting device has the inert gas control device, this device when the inert gas pressure in the expansion tank is lower than first pressure in expansion tank inert gas injecting, when the inert gas pressure in the expansion tank is higher than second pressure, from expansion tank, emit inert gas.

46. as claim the 45 described pressure settings, it is characterized in that: aforementioned first pressure is 2kPa, aforementioned second pressure is 5kPa.

47. pressure setting as claimed in claim 37 is characterized in that: aforementioned pressure setting can be discharged the gas that produces in the soft circulation circuit.

48. pressure setting as claimed in claim 47 is characterized in that: aforementioned gas dump valve is to be installed on the gas recycling can, and this gas recycling can is located in the thermal medium closed circuit, is used to reclaim the gas that produces in the thermal medium closed circuit.

49. pressure setting as claimed in claim 48, it is characterized in that: aforementioned gas dump valve, when the gas pressure of gas recycling can surpasses the 3rd pressure, open aforementioned gas dump valve, from the gas recycling can, emit gas, after the gas dump valve is opened, when the gas pressure of gas recycling can is lower than the 4th pressure, close aforementioned gas dump valve.

50. pressure setting as claimed in claim 49 is characterized in that: aforementioned the 3rd pressure is 4kPa, and aforementioned the 4th pressure is 2kPa.

51. pressure setting as claimed in claim 33, it is characterized in that: aforementioned pressure setting has a thermal medium oil cooler, by the temperature of adjusting its thermal medium oil aforementioned hot plate is cooled off with the cooling velocity in the certain limit in the time of can cooling off after aforementioned pressure setting is with aforementioned machined object hot pressing admittedly.

52. pressure setting as claimed in claim 51, it is characterized in that: aforementioned pressure setting has that the thermal medium oil content is equipped to be put, and this distributor can be controlled the flow-rate ratio of the aforementioned hot medium oil that is assigned to aforementioned hot medium oil heating unit and aforementioned hot medium oil cooler.

53., it is characterized in that as claim 51 or 52 described pressure settings: aforementioned hot medium oil cooler have from aforementioned hot medium oil closed circuit branch out and return aforementioned hot medium oil closed circuit bypass line, be located at be used in the aforementioned bypass pipe road with by the oil cooled cooler of the thermal medium of bypass line, be installed in the adjustable throttle of cooler upstream side of bypass line to the diaphragm valve of the aforementioned hot medium oil flow of cooler.

54. the control method of a pressure setting, the pressure setting of this method control can be provided with hot plate near reaching between the pair of plates of separating, by the aforementioned hot plate of the thermal medium that circulates oil heating in the thermal medium oil circulation stream that comprises the heating channel that is formed at the aforementioned hot intralamellar part, it is characterized in that: aforementioned control method control pump makes thermal medium oil circulation, control be disposed at aforementioned hot plate outside with aforementioned U-shaped pipe be coaxial manner intert at least a portion in the U-shaped pipe that the aforementioned hot medium oil of the thermal medium oil heating unit of being located at heating aforementioned hot medium oil passed through electric heater and to the heating of aforementioned hot medium oil.

55. the control method of pressure setting as claimed in claim 54 is heated to 350～450 ℃ by aforementioned control method with aforementioned hot plate.

56. as the control method of claim 54 or 55 described pressure settings, wherein aforementioned control method is maintained at the pressure of aforementioned hot medium oil in the certain limit more than the vapour pressure of aforementioned hot medium oil.

57. the control method of pressure setting as claimed in claim 56, wherein aforementioned control method is pressurizeed aforementioned hot medium oil with inert gas, and the pressure of aforementioned hot medium oil is maintained in the certain limit more than the vapour pressure of aforementioned hot medium oil.

58. the control method of pressure setting as claimed in claim 57, wherein aforementioned indifferent gas system via the pipe arrangement that is branched out from aforementioned hot medium circulation loop accumulate in the consecutive expansion drum in aforementioned hot medium circulation loop in, and in the aforementioned expansion drum of the aforementioned controlling party genealogy of law with aforementioned inert gas to the oil pressurization of aforementioned hot medium.

59. the control method of pressure setting as claimed in claim 58, wherein aforementioned control method is controlled in the pressure of the aforementioned inert gas in the aforementioned expansion drum in the certain limit.

60. control method as claim the 59 described pressure settings, the pressure of the aforementioned inert gas of wherein aforementioned control method in aforementioned expansion drum is reduced to first pressure and aforementioned expansion drum is injected aforementioned inert gas when following, emits aforementioned inert gas from aforementioned expansion drum and the pressure of the aforementioned inert gas in aforementioned expansion drum is reduced to second pressure when following.

61. the control method of pressure setting as claimed in claim 60, wherein aforementioned first pressure is 2kPa, and aforementioned second pressure is 5kPa.

62. the control method of pressure setting as claimed in claim 54, wherein aforementioned control method is removed the gas that results from the aforementioned hot medium circulation loop.

63. the control method of pressure setting as claimed in claim 62, the pressure of the gas of the gas recycling can of wherein aforementioned control method in being arranged at aforementioned hot medium circulation loop is to emit gas from aforementioned gas recycling can when surpassing the 3rd pressure, and, then stop to emit gas when following if the gas pressure of aforementioned gas recycling can is reduced to the 4th pressure in when aforementioned gas recycling can is emitted gas.

64. as the control method of the described pressure setting of claim 63, wherein aforementioned the 3rd pressure is 4kPa, and aforementioned the 4th pressure is 2kPa.

65. the control method of pressure setting as claimed in claim 54, wherein aforementioned control method is done hot pressing back and when it is cooled off admittedly in aforementioned pressure setting with machined object, and the temperature of adjusting aforementioned hot medium oil makes aforementioned hot plate be cooled with the cooling velocity in the certain limit.

66. as the control method of the described pressure setting of claim 65, wherein aforementioned control method is controlled the flow-rate ratio of the aforementioned hot medium oil of the thermal medium oil cooler that is dispensed to aforementioned hot medium oil heating unit and cooling aforementioned hot medium oil.

67. as the control method of the pressure setting of claim 65 or 66, wherein aforementioned control method adjustment flows to and is arranged at the flow of above-mentioned thermal medium oil of the oil cooler that is used to cool off the thermal medium oil by above-mentioned bypass pipe midway that branches out and be back to the bypass pipe of aforementioned hot medium oil closed circuit from aforementioned hot medium oil closed circuit.

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