CN1176875A - Pressure sensor-equipped ejector pin - Google Patents

Pressure sensor-equipped ejector pin Download PDF

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Publication number
CN1176875A
CN1176875A CN97119283A CN97119283A CN1176875A CN 1176875 A CN1176875 A CN 1176875A CN 97119283 A CN97119283 A CN 97119283A CN 97119283 A CN97119283 A CN 97119283A CN 1176875 A CN1176875 A CN 1176875A
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CN
China
Prior art keywords
pressure sensor
jemmy
pressure
mould
annulus
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CN97119283A
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Chinese (zh)
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CN1080638C (en
Inventor
川崎博明
广岛裕
石绵靖雄
秋成千里
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双叶电子工业株式会社
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Priority to JP234286/96 priority Critical
Priority to JP8234286A priority patent/JP3045078B2/en
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Publication of CN1176875A publication Critical patent/CN1176875A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/77Measuring, controlling or regulating of velocity or pressure of moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/40Removing or ejecting moulded articles
    • B29C45/4005Ejector constructions; Ejector operating mechanisms
    • B29C45/401Ejector pin constructions or mountings

Abstract

The present invention provides a ejector pin can be easily fitted on an existing mold without fitting working and to detect pressure in a cavity.PROBLEM TO BE SOLVED: To easily fit an ejector pin on an existing mold without fitting working and to detect pressure in a cavity. SOLUTION: The first template and the second template of a mold for molding are combined and a resin is filled between a cavity and a core to mold a molded article. When both templates are relatively separated, the molded article is projected out by a rod-like part 25 of an ejector pin 24. A brim part 26 exists on the base part of the rod-like part. The brim part 26 is stored in a cylindrical box body 30. The top part of the brim part 26 and the top part of the box body 30 are fixed elastically with a silicone resin 36. A pressure sensor 32 provided on the bottom face of the box body 30 faces to the underside of the brim part 26 at an interval. The pressure in the cavity during molding is loaded on the rod-like part 25 of the ejector pin 24. The silicone resin 36 is elastically deformed by this pressure and the brim part 26 of the ejector pin 24 presses the pressure sensor 32. As the pressure sensor 32 and the ejector pin 24 are integrated, it is unnecessary to work out a mold for setting up the pressure sensor.

Description

The jemmy of band pressure sensor

The present invention relates to a kind of jemmy, be specifically related to a kind ofly be suitable for detecting the jemmy of the band pressure sensor of the resin pressure that injects in the mold cavity simultaneously at launch mode molding product from mould with pressure sensor.

Conventional plastic injection (mo(u)lding) machine and its control system have structure as shown in figure 11 usually.Particularly, charge into resin material in the cylinder 100, in heater 101 heating, be sent to the front end of cylinder 100, thereby bear compression and rub and plasticising by screw rod 102.The resin of plasticising is pulled to the front end of cylinder 100 and is collected, and the quantity increase of resin of plastification causes screw rod 102 to retreat, thereby when the amount of resin of collecting acquired a certain degree, screw rod 102 stopped the rotation.This is referred to as plasticising/feed.Then, charge into hydraulic oil in the hydraulic injection cylinder 103, lead-screw 102 forward, thereby resin of plastification is injected in the die cavity of the mould 104 that clamping.This is referred to as injection moulding.Afterwards, cooling mould 104 is also opened, and taking out molded article then from mould is product.This is referred to as cooling.

In described injection moulding, assess the quality of layered product and visual carrying out leaned in defective layered product classification, the result according to molding imports condition of moulding from control panel then.The condition that is provided with comprises the temperature of the position of screw rod and speed, resin and pressure, cool time etc.Like this, described system is the open loop control type, wherein injection pressure, resin temperature, injection moulding speed are controllable variablees in the mould machine, and the instability of viscous fluid to flow be variable factor in the plastic-injection moulding machine, it and comprise that the complicated factor of heat conduction will influence the quality of layered product considerably.This is because system does not analyze the interior pressure of mold cavity, temperature etc. basically, so can not find best condition of moulding.

Referring to Figure 12, it shows the conventional plastic injection (mo(u)lding) machine that has control system.This system keeps track is regulated pressure wave, pressure in the cylinder 100 detects its deformation by force cell 105 and measures, thereby decides the optimum speed or the speed of screw rod 102, and this is in the condition that is provided with one, iptimum speed feeds back to servomotor 106 then, in order to drive screw 102.So detected is the pressure of mould 104 front ends, rather than the pressure in the mould 104, cause suitable screw rod iptimum speed can not be set.

Referring now to Figure 13,,, illustrated mould in the traditional plastic-injection moulding machine as an example.This mould comprises first force cell 111 of direct detection mold cavity 110 internal pressures.It also comprises second force cell 113, it be installed separately to overhanging jemmy 112 from die cavity 110, and adjacent with jemmy 112 ends.Force cell 111 and 113 is installed in needs specific processing on the mould, thereby forms hole and groove on mould.

In the control system of plastic-injection moulding machine shown in Figure 11, because being provided with of optimum condition must be according to the visual observation of layered product quality, so need carry out the experiment of several times.In addition because the variable factor in the mould machine also can cause the variation of layered product quality.And, during the condition that the is provided with mistake of mould machine, also can damage mould.

The control system of plastic-injection moulding machine shown in Figure 12 is not used for detecting the structure of pressure in the mould, thereby, have the described defective in the control system shown in Figure 12 equally.

In addition, in plastic-injection moulding machine control system shown in Figure 13,,, just need process mould for force cell 111 and 113 is installed on the mould because increase with the force cell size.Regrettably, this processing can not be depended on the type of mould.And processing needs more manpower financial capacity, and the expense increase of force cell own, and this just influences using of this control system and popularizes.

The present invention considers the described defective of prior art and proposes.

Thereby, the purpose of this invention is to provide a kind of jemmy with pressure sensor, it can be installed on the mould easily, and does not need mould is carried out any processing.

Another object of the present invention provides a kind of jemmy that has pressure sensor, and it can directly detect the pressure in the mold cavity.

According to the present invention, a kind of jemmy that is used in the band pressure sensor on the mould is provided, consisting of of this mould: first pattern (template) that has die cavity, and have second pattern of core, second pattern can move with respect to first pattern, make layered product by between die cavity and core, injecting resin, thereby when first and second patterns separate, the layered product application of force is released it from pattern with the jemmy end.The jemmy of band pressure sensor comprises the molding body of rod that has end, and the pressure-detecting device that is installed in molding body of rod rear portion and is connected as a single entity with it, to detect the pressure that puts on the end of the molding body of rod in the process of layered product molding in the die cavity.

In most preferred embodiment of the present invention, the molding body of rod comprises the bar-like portion that has end, and end is used for the launch mode molding product; And the diameter annulus big than bar-like portion, it is installed in the rear portion of bar-like portion.Pressure-detecting device comprises the shell that holds annulus, and it can move in specific scope with respect to annulus; And the pressure sensor that is positioned at shell, when pressure was added in the molding body of rod terminal, pressure sensor is pressurized between the inner face of annulus bottom surface and shell.

In most preferred embodiment of the present invention, this shell comprises that elasticity is installed in the upper plate on annulus top, faces toward the bottom surface of annulus and the lower plate of a predetermined space is arranged and the plate portion that connects upper plate and lower plate with it.Pressure sensor is installed on the lower plate member of shell.

In most preferred embodiment of the present invention, fixedly connected with silicone resin with lower plate in the top of annulus.

At length be introduced below in conjunction with accompanying drawing, so just should be readily appreciated that described purpose of the present invention and other purposes, and many advantages.

Fig. 1 is a kind of block diagram of plastic-injection moulding machine, and it has the jemmy of band pressure sensor of the present invention;

Fig. 2 is a kind of cutaway view of mould, and it has the jemmy of band pressure sensor of the present invention;

Fig. 3 is the amplification view of major part among jemmy first embodiment of band pressure sensor of the present invention;

Fig. 4 a is mounted in the schematic appearance of the pressure sensor in the jemmy shown in Figure 3;

Fig. 4 b is the amplification view of pressure sensor shown in Fig. 4 a;

Fig. 5 is the plane that the experiment mould of jemmy shown in Figure 3 is installed;

Fig. 6 is the schematic diagram in experiment mould shown in Figure 5 time experiment mould position pressures cycle in injection moulding;

Fig. 7 a to d is respectively experiment mould shown in Figure 5 is tested mould position pressures cycle when injection moulding a schematic diagram;

Fig. 8 is the amplification view of major part among second embodiment of jemmy of band pressure sensor of the present invention;

Fig. 9 is the amplification view of major part among the 3rd embodiment of jemmy of band pressure sensor of the present invention;

Figure 10 is the amplification view of major part among the 4th embodiment of jemmy of band pressure sensor of the present invention;

Figure 11 is a kind of block diagram of conventional plastic injection (mo(u)lding) machine;

Figure 12 is the block diagram of another kind of conventional plastic injection (mo(u)lding) machine;

Figure 13 is the cutaway view of mould in the another kind of conventional plastic injection (mo(u)lding) machine.

Now, will introduce the jemmy of band pressure sensor of the present invention according to Fig. 1 to Figure 10.

At first referring to Fig. 1 to Fig. 7 d, wherein illustrated first embodiment of jemmy of band pressure sensor of the present invention, Fig. 1 is a kind of control system of plastic-injection moulding machine, and the jemmy of band pressure sensor of the present invention is housed on this machine.Control system comprises pressure sensor and temperature sensor, and it is installed in one side of mould B respectively.Pressure sensor and temperature sensor detect the pressure and temperature in the mould Type B chamber respectively, thereby produce signal respectively.The signal that produces is delivered in the feedback device 1, is used for controlling pressure, cool time of temperature, the resin of the speed of position, screw rod of moulding variables such as screw rod or speed, resin or the like.

The structure that is contained in the mould B in the control system shown in Figure 1 as shown in Figure 2.Specifically, mould B comprises the cover half installing plate 10 that is installed on the plastic-injection moulding machine cover half die holder (stationary-side holder), and is installed in the dynamic model installing plate 11 on the plastic-injection moulding machine dynamic model die holder.The die part or the cover half 12 that have die cavity 12a are installed on the cover half installing plate 10.By support plate 14 and spacing block 15 punch that has core 13a being installed on the dynamic model installing plate 11 is dynamic model 13.

Mould B is separable between cover half 12 and dynamic model 13.Dynamic model 13 can move with respect to cover half 12 with the die holder while of plastic-injection moulding machine in the direction perpendicular to the plane, makes cover half 12 and dynamic model 13 open and close.Cover half 12 has fairlead 19, and correspondingly dynamic model 13 has lead 18.Lead 18 slidably is inserted in the fairlead 19.The switching of cover half 12 and dynamic model 13 has fairlead 19 and lead 18 to guide, and cover half 12 and dynamic model 13 open and close and make die cavity 12a and core 13a each other to arriving accurate position.

Inlet 16 is arranged on the cover half installing plate 10, and it can be used as the melt resin is injected into passage or path the mould B from cylinder 2 nozzles of mould machine; Also have retainer ring 17, it can be used as mould B is installed to fixture on cylinder 2 nozzles of mould machine.

Lifting plate 21 is arranged on the dynamic model installing plate 11.Jemmy 24 is arranged on the lifting plate 21, and when mould B opened, it went up molding with layered product from core 13a, so that remove from mould.Also have return bar 22 on the lifting plate 21, if preposition, and retract jemmy 24 lifting plate 21 is got back to pre-.

As shown in Figure 3, jemmy 24 comprises the rounded bar-like portion in cross section 25, and its top is used for the jack-up layered product; And cylindrical annulus 26, it is positioned at the bar-like portion rear end.The external diameter of annulus 26 is bigger than bar-like portion 25.

Pressure-detecting device 30 is installed on the jemmy 24 and is integral.In the illustrated embodiment, pressure-detecting device 30 comprises the shell 31 that holds jemmy 24 annulus 26, and the pressure sensor 32 in the shell 31.

The shell 31 that holds annulus 26 is cylindric.Shell 31 comprises with elastic type and is installed in annular upper plate 33 above the annulus 26, relative with the bottom surface of annular section 26 and the cylindrical side plate 35 of lower plate 34 and the connection upper plate 33 and the lower plate 34 of certain intervals arranged.In the illustrated embodiment, the bar-like portion 25 of jemmy 24 slidably is inserted in the upper plate 33 of shell 31, and the underrun silicone resin 36 of the end face of annular section 26 and lower plate 33 flexibly links together.

Pressure sensor 32 is installed in the shell 31, be fixedly mounted on lower plate 34 inner face or above.Pressure sensor 32 has the lead of a connection, guides to the outside of shell 31 by through hole on shell 31 side plates 35.During placement force sensor 32, between the bottom surface of pressure sensor 32 and annular section 26, leave suitable gap.After the die cavity 12a of mould B injects resin, the pressure of resin will be added in the top of jemmy 24.Pressure acts on the jemmy 24, makes the annulus 26 of jemmy 24 to be joined silicone resin 36 strains that connect jemmy 24 and shell 31 with pressure sensor 32.

The gap of the bottom surface of pressure sensor 32 and annular section 26 is to be provided with like this, when the pressure jemmy 24 owing to die cavity 12a moves, silicone resin 36 strains are joined annular section 26 and pressure sensor 32, to carry out the corresponding pressure measxurement that sensitivity is amplified.Keep in touch and suitable gap as described in not having as annular section 26 and pressure sensor 32, just may produce defective, make the pressure sensor malfunction as gravity, and pressure sensor 32 detects vibration of jemmy 24 or the like owing to jemmy 24.

In the described structure of illustrated embodiment, the annular section 26 of jemmy 24 and pressure sensor 32 are installed in the shell 31, can protect pressure sensor 32 well, also make jemmy 24 that good surface appearance is arranged.And, as mentioned above, described suitable gap is arranged between pressure sensor 32 and annular section 26.

The structure of pressure sensor 32 can be as shown in Figs. 4a and 4b.Specifically, pressure sensor 32 is a piezoelectric sensor, includes as semi-conductive two-layer sulfuration molybdenum layer 40; Last silver electrode 41 and following silver electrode 42 are inserted with sulfuration molybdenum layer 40 between these the two poles of the earth; Terminals 43 and 44 of drawing respectively from electrode 41 and 42.Pressure sensor 32 scribbles the insulator 45 of polyimides or similar material usually.Reduce greatly on pressure sensor 32 thickness of this spline structure and the size.For example, it can be made into the about 0.8mm of thickness, the about 5mm of diameter.

Now, with the process of introducing with the plastic-injection moulding machine molding of this structure.

Among Fig. 1, be injected into resin material in the cylinder 2 in heater 3 heating, be transported to the front end of cylinder 2, make it to bear compression and rub, cause its plasticising by screw rod 4.Then, the resin of plastification quantity that pushes and collect along with the front end of cylinder 2 increases, and screw rod 4 retracts, and when amount of resin reaches certain standard, stops the rotation of screw rod 4.Then, hydraulic oil is input to the injection nozzle,, resin of plastification is injected in the die cavity 12a of the mould B that clamping among Fig. 2 thus to move forward screw rod 4.

When resin being injected in the mould B, the pressure of die cavity 12a is added on the jemmy 2.By pressure sensor 32 detected pressures on the annular section 26 that is installed in jemmy 24, pressure sensor produces signal then.This signal is input on the feedback device shown in Figure 11, makes the pressure, cool time etc. of temperature, resin of rotary speed, resin of moulding variables such as screw position, screw rod be in closed-loop control.Molding was opened mould layered product is removed after the regular hour.

Now, as an example, utilize the jemmy 24 of band pressure sensor 32 to measure the experiment that pressure carried out in the mould explanation.

Figure 5 shows that the mould 50 of experiment usefulness.Experiment mould 50 has spiral helicine chamber, makes layered product shape in the shape of a spiral.In the experiment mould 50 12 jemmies are housed altogether.In 12 such jemmies, 4 jemmies adopt the jemmy 24 of band pressure sensor 32.Jemmy 24 is arranged on the terminal position d of the medium position c of entry position b, die cavity of the position a of die cavity before just that inject resin, die cavity and die cavity.The distance of position a and position c is 376.2mm.The plastic-injection moulding machine that is used for this experiment is identical with cardinal principle shown in Fig. 1 with control system.

In the plastic-injection moulding machine that experiment mould 50 is installed, have in the pressure sensor 32 detected die cavities of each jemmy 24 pressures cycle as shown in Figure 6.As shown in Figure 6, press a respectively in first circulation and second circulating pressure, b, c, the order of d reduces.Detected pressure shows at position d place, and resin has been full of die cavity.In general, the deviation of the pressure line of each position shows the flow velocity of resin in each circulation, and like this, resin flow can be analyzed according to result shown in Figure 6.Thereby the waveform of the pressures cycle at each place, measuring position that obtains when adopting the method for experiment correctly to carry out molding by understanding can be controlled moulding variables, and continue to obtain flawless layered product.

Fig. 7 a to Fig. 7 d has shown the pressure waveform in first circulation of position a to d each point and second circulation respectively.The situation that Fig. 7 a to Fig. 7 d shows shows that although detect pressure at position a to c in first circulation and second circulation, position d does not detect pressure, and this explanation resin is not filled to whole die cavity, thus fail to obtain need resin moulded.

The structure of the jemmy 24 of band pressure sensor 32 is such, and jemmy 24 is combined into an integral body with pressure sensor 32.Such structure makes when increasing the positional number of gaging pressure, just need conventional ejector pins is changed into the jemmy 24 of band pressure sensor, and do not need mould is carried out special processing, thereby the pressures cycle accuracy of waveform that obtains increases.

Referring to Fig. 8 to Figure 10, shown second to the 4th embodiment of the jemmy of band pressure sensor of the present invention.Among illustrated each embodiment, use deformeter as pressure sensor.The common structure of deformeter is: because ambient pressure causes resistance wire to produce strain, utilize the changes in resistance of the resistance wire of deformeter to come gaging pressure.

At first, referring to Fig. 8 second embodiment is described, Fig. 8 has shown the cutaway view of the amplification of jemmy 60 major parts in the illustrated embodiment.Jemmy 60 comprises bar-like portion 61 and the bigger annulus 62 of diameter, and it is positioned at the bottom of bar-like portion 61.Basically the core in annulus 62 bottom surfaces has a projection 67.The bar-like portion 61 of jemmy 60 is inserted in the upper plate of roughly cylindrical shell 63 slidably, and annular section 62 is positioned at shell 63.On shell 63 bottoms or inner face be provided with steel plate 64, dottle pin 66 is arranged therebetween.There is dottle pin 66 supporting on the bottom surface of steel plate 64, the deformeter as pressure sensor is arranged on the plate 64.The remainder of second embodiment and first embodiment are roughly the same.

Like this, when load was added on the jemmy 60 vertically downwards, by being positioned at the projection 67 on annular section 62 bottom surfaces, load just was added in the centre above the steel plate 64 basically.The two ends of steel plate 64 have dottle pin 66 supporting, thereby the load that is added on the steel plate 64 just makes deformeter 65 detect dependent variable.So,, just can calculate load value according to the computing formula of moment of flexure according to the dependent variable of measuring.

Now, referring to Fig. 9 the 3rd embodiment is described, Fig. 9 is the cutaway view of the amplification of the major part of jemmy 70 in the illustrated embodiment.Jemmy 70 comprises bar-like portion 71 and the bigger annulus 74 of diameter, and annulus 74 is positioned at the bottom of bar-like portion 71.Have at least a pair of supporting leg to extend downwards in annulus 74 bottom surface peripheries.Insert the core of jemmy between the supporting leg 75.The bar-like portion 71 of jemmy 70 is slidably passed the upper plate of roughly cylindrical shell 72.Annulus 74 and supporting leg 75 are positioned at shell 72.Should make that the height summation of the thickness of annulus 74 and each supporting leg 75 is consistent with the height of chamber 72 inside when simultaneously, annulus 74 and supporting leg 75 are made.Deformeter 73 as pressure sensor is arranged on the bottom surface of annulus 74.The remainder of the 3rd embodiment and described first embodiment are roughly the same.

In the such structure of the 3rd embodiment, when load was added on the jemmy 70 vertically downwards, load was delivered to annulus 74, made annulus 74 that strains take place, and measured by deformeter 73.So the dependent variable according to measuring just can calculate load value according to the calculation of Bending Moment formula.

Now, the 4th embodiment of the jemmy of band pressure sensor of the present invention is described referring to Figure 10, Figure 10 has shown the amplification view of jemmy 80 major parts in the illustrated embodiment.Jemmy 80 comprises bar-like portion 81 and the bigger annulus 85 of diameter, and it is positioned at the lower end of bar-like portion 81.The bar-like portion 81 of jemmy 80 is passed the upper plate of roughly cylindrical shell 82 slidably, and annular section 85 is positioned at shell 82.Dottle pin 84 is arranged in the shell 82, and annulus 85 is inserted between the upper plate and dottle pin 84 of shell 82.The remainder of the 4th embodiment and described first embodiment are roughly the same.

In the such structure of the 4th embodiment, when load was added on the jemmy 80 vertically downwards, load was delivered on the annulus 85, made annulus 85 produce strains, and measured by deformeter 83.So,, just can calculate load value according to the computing formula of moment of flexure according to the dependent variable of measuring.

From as can be seen described, structure of the present invention is: device for pressure measurement is installed in the rear portion of jemmy, is connected as a single entity with it.Such structure does not need for the setting pressure sensor mould to be processed, and makes the cost of mould significantly reduce.Simultaneously, make the part of mould be jemmy as pressure sensor, help like this installing, and reduced component count.And, make the jemmy of band pressure sensor directly measure the pressure of mold cavity, can obtain suitable condition of moulding.

And measured die cavity internal pressure provides pressure waveform, by analyzing pressure waveform, can seal regularly the mould lid like this, and by observing pressure waveform condition of moulding is set.Several jemmy of the present invention can be placed in the die cavity by streamwise, thereby can analyze resin flow in the die cavity effectively.

Moreover in the present invention, jemmy itself is as pressure sensor, like this mould to resin moulded process in, the damage of jemmy can detect at an easy rate.Pressure sensor is installed in can not needed on the mould mould is just processed and can be finished, thereby just can not reduce the intensity of mould.

In addition, the jemmy of band pressure sensor of the present invention directly detects the pressure in the mold cavity, thereby can suitably control the injection pressure of resin, damages to prevent mould.

In addition, the present invention can make pressure sensor be positioned at the position of any needs of die cavity, can control the resin injection rate of die cavity like this by the pressure that pressure sensor detects.

Although in conjunction with the accompanying drawings most preferred embodiment of the present invention has been done to a certain degree to explain, under described enlightenment, can make tangible modifications and variations.Thereby, can think that in the scope of appending claims, enforcement of the present invention is not only as top specifically described.

Claims (4)

1. jemmy that is used for the band pressure sensor of mould, this mould comprises: first pattern that has die cavity; And having second pattern of core, second pattern can move relative to first pattern; Make layered product by in die cavity and core, injecting resin, when first pattern and second pattern are separated from each other, the layered product application of force is released it from pattern with the jemmy top; This jemmy comprises:
The molding body of rod that has described top;
Be installed in the pressure sensor device at this molding body of rod rear portion with integral way, in the process of described product molding, it is used for detecting the pressure that acts on described molding body of rod top in the die cavity.
2. the jemmy of band pressure sensor as claimed in claim 1, wherein: the described molding body of rod comprises the bar-like portion that has the top that promotes layered product, and diameter is big and be installed in the annulus at bar-like portion rear portion than bar-like portion; And
Pressure-detecting device comprises and holds described annulus and can be with respect to the shell of the removable specific range of described annulus, and the pressure sensor that is positioned at this shell, when pressure was added in the top of described bar, pressure sensor is pressurized between the inner face of the bottom surface of described annulus and described shell.
3. the jemmy of band pressure sensor as claimed in claim 2, wherein: described shell comprises the upper plate, relative with the bottom surface of annulus and the side plate of lower plate and the connection upper plate and the lower plate of certain intervals arranged with it that is installed in described annulus top with elastic type; And,
Described pressure sensor is installed on the lower plate of chamber.
4. the jemmy of band pressure sensor as claimed in claim 3, wherein: the described top and the described lower plate of described annulus are fixed together with silicone resin.
CN97119283A 1996-09-04 1997-09-04 Pressure sensor-equipped ejector pin CN1080638C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP234286/96 1996-09-04
JP8234286A JP3045078B2 (en) 1996-09-04 1996-09-04 Ejector pin with pressure sensor

Publications (2)

Publication Number Publication Date
CN1176875A true CN1176875A (en) 1998-03-25
CN1080638C CN1080638C (en) 2002-03-13

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CN97119283A CN1080638C (en) 1996-09-04 1997-09-04 Pressure sensor-equipped ejector pin

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KR (1) KR100258304B1 (en)
CN (1) CN1080638C (en)
TW (1) TW471387U (en)

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CN101941279A (en) * 2006-12-19 2011-01-12 本田技研工业株式会社 Injection molding apparatus
CN105307833A (en) * 2013-04-30 2016-02-03 迈克尔·雷蒙德·格罗洛 Intermediate connector
TWI674959B (en) * 2018-11-30 2019-10-21 財團法人金屬工業研究發展中心 Pressure and temperature sensing device in the mold

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US8425217B2 (en) * 2009-12-23 2013-04-23 Rodney J. Groleau Method for installing indirect and direct mold pressure, temperature and flow front detection sensors without machining the mold
JP6184452B2 (en) * 2015-09-04 2017-08-23 双葉電子工業株式会社 Pin with pressure sensor and molding device

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US4015620A (en) * 1974-10-11 1977-04-05 Gulf & Western Manufacturing Company High response unloading valve
KR100197304B1 (en) * 1993-10-01 1999-06-15 오자와 미토시 Injection molding machine for controlling a molding process
CN2176895Y (en) * 1993-12-13 1994-09-14 林坤旺 Improved die pull-out mechanism
JP3499321B2 (en) * 1995-03-14 2004-02-23 大和化成工業株式会社 Pressure detection pin
JP5164636B2 (en) * 2008-03-28 2013-03-21 三菱電機株式会社 Solar cell module

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101941279A (en) * 2006-12-19 2011-01-12 本田技研工业株式会社 Injection molding apparatus
CN105307833A (en) * 2013-04-30 2016-02-03 迈克尔·雷蒙德·格罗洛 Intermediate connector
CN105307833B (en) * 2013-04-30 2017-08-18 迈克尔·雷蒙德·格罗洛 Intermediate connector
TWI674959B (en) * 2018-11-30 2019-10-21 財團法人金屬工業研究發展中心 Pressure and temperature sensing device in the mold

Also Published As

Publication number Publication date
TW471387U (en) 2002-01-01
JP3045078B2 (en) 2000-05-22
KR100258304B1 (en) 2000-06-01
CN1080638C (en) 2002-03-13
JPH1076554A (en) 1998-03-24
KR19980024332A (en) 1998-07-06

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