KR101757073B1 - Temperature measuring device of die casting - Google Patents

Temperature measuring device of die casting Download PDF

Info

Publication number
KR101757073B1
KR101757073B1 KR1020150181553A KR20150181553A KR101757073B1 KR 101757073 B1 KR101757073 B1 KR 101757073B1 KR 1020150181553 A KR1020150181553 A KR 1020150181553A KR 20150181553 A KR20150181553 A KR 20150181553A KR 101757073 B1 KR101757073 B1 KR 101757073B1
Authority
KR
South Korea
Prior art keywords
ejector pin
temperature measurement
temperature
measurement sensor
temperature measuring
Prior art date
Application number
KR1020150181553A
Other languages
Korean (ko)
Other versions
KR20170073765A (en
Inventor
이영철
김정태
조인성
Original Assignee
한국생산기술연구원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국생산기술연구원 filed Critical 한국생산기술연구원
Priority to KR1020150181553A priority Critical patent/KR101757073B1/en
Publication of KR20170073765A publication Critical patent/KR20170073765A/en
Application granted granted Critical
Publication of KR101757073B1 publication Critical patent/KR101757073B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2236—Equipment for loosening or ejecting castings from dies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings
    • G01K1/12—Protective devices, e.g. casings for preventing damage due to heat overloading
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples

Abstract

The present invention relates to a die casting temperature measuring apparatus, comprising: a temperature measuring sensor unit for measuring temperature; And an ejector pin having a seating groove formed in the longitudinal direction except for a part of the front end portion contacting the casting and having a head portion formed at a rear end thereof so that the temperature measuring sensor is seated thereon, And the temperature measuring sensor part which is seated in the mounting groove of the ejector pin and the ejector pin are integrally formed.

Description

[0001] TEMPERATURE MEASURING DEVICE OF DIE CASTING [0002]

The present invention relates to a die casting temperature measuring apparatus.

Generally, die casting molds are made by melting a metal material such as an aluminum alloy, a zinc alloy or the like and injecting the molten metal into a cavity formed between the fixed plate and the movable mold, and cooling the injected molten metal to form the product will be.

In the molding process using the die casting mold, proper temperature maintenance affects the quality of the molded article.

Therefore, the temperature of the die casting die is measured, and the temperature of the die is controlled by appropriately cooling or heating the die accordingly.

As described above, in order to control the molding temperature of the mold, it is required to measure the temperature of the portion directly contacting the casting. In the past, a method of measuring the surface temperature of the core after stopping the equipment and opening the mold has been used.

However, due to the limit of measuring the surface temperature of the core after the core is cooled, it is not possible to measure the temperature at the time of filling the molten metal in the die casting process, and proper temperature maintenance is impossible.

In recognition of the above problems, recently, a sensor inserting hole is formed in a portion of a mold directly contacting a casting of a mold, and a temperature measuring sensor is inserted into the sensor inserting hole to measure the temperature of the core in real time. A method of controlling the temperature of the mold by controlling the flow rate of the cooling water for cooling the core is used.

1 is a cross-sectional view showing a structure in which a temperature measuring sensor is installed in a conventional general mold. Referring to FIG. 1, generally, a mold is formed by molding molten metal into a cavity formed between a fixed plate M1 and a core C integrally attached to a movable plate M2.

In the core, not only a sensor insertion hole H for inserting a temperature measurement sensor but also a cooling water passage F for flowing cooling water for cooling the mold is formed and an ejector pin SP for ejecting the die casting mold P Is inserted into the pin hole.

The ejector pins SP can be installed on the movable plate M2 and the core C although the ejector pins SP are provided on the fixed plate M1 so as to be moved up and down together with the ejector plate E .

The process of inserting the sensor insertion holes H for mounting the temperature measurement sensors S1 and S2 is performed by inserting the sensor insertion holes H so as to prevent interference with the cooling water passage F and the pinhole, The manufacturing cost of the mold is increased due to the additional sensor insertion hole H, and in particular, a separate sensor insertion hole H is formed as shown in FIG. There is a problem that when the core is machined into the core (C), the core is cracked due to the machining of the sensor insertion hole (H).

Korean Registered Patent No. 1362700 (Registered: Feb. 28, 2014, name: high vacuum die casting mold structure)

The present invention provides a die casting temperature measuring device which is integrally formed with a temperature measuring sensor part by forming a seating groove on one side of an ejector pin which is essentially installed in a metal mold and can grasp the state of the temperature measuring sensor part without separating from the ejector pin .

The present invention also provides a die casting temperature measuring apparatus in which a temperature measuring sensor unit is closely attached to an inner end portion of a tip of an ejector pin to increase temperature measurement accuracy.

The present invention also provides a die casting temperature measuring apparatus for forming a rotation preventing member in a header portion of an ejector pin so as not to be coupled to an ejector plate and rotated.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems.

Die casting temperature measuring device of the present invention for achieving the above object, in the die casting temperature measurement, a temperature measurement sensor for measuring a temperature; And an ejector pin having a seating groove formed in the longitudinal direction except for a part of the front end portion contacting the casting and having a head portion formed at a rear end thereof so that the temperature measuring sensor is seated, And the temperature measuring sensor part which is seated in the mounting groove of the ejector pin and the ejector pin are integrally formed by welding.

Specifically, the vertical cross section of the ejector pin is L-shaped with respect to the seating groove.

In addition, a rotation preventing member is further formed on the outer circumferential surface of the head portion so that the ejector pin is not rotated.

In addition, the tip end inner side of the ejector pin and the tip end of the temperature measurement sensor are closely attached.

Further, the diameter of the head portion is larger than the diameter of the tip portion of the ejector pin.

As described above, according to the present invention, it is not necessary to process a metal mold for installing a separate temperature measurement sensor, which can reduce the machining cost of the metal mold, prevent cracking of the core, The temperature measuring sensor can be easily installed even in the mold.

According to the present invention, there is an effect that a front end portion of a certain thickness can be formed by forming a seating groove on the side surface of the ejector pin on which the temperature measurement sensor is mounted.

Further, according to the present invention, there is an effect that the temperature measurement sensor portion can be easily coupled by the mounting groove formed in the longitudinal direction on the side surface of the ejector pin.

Further, the present invention has an effect that it is easy to grasp the state of the temperature measurement sensor unit from the outside without detaching the temperature measurement sensor unit from the ejector pin.

In addition, the present invention has the effect of increasing the accuracy of temperature measurement by fixing the temperature measuring sensor in close contact with the inner side of the tip of the ejector pin.

In addition, the present invention has an effect of preventing the twist of the cable for transmitting the measurement information of the temperature measurement sensor unit to the external input means by the ejector pin being seated on the ejector plate by the rotation preventing member formed on either side of the outer periphery of the head .

1 is a sectional view showing a structure in which a temperature measuring sensor is installed in a general mold.
2 is a cross-sectional view illustrating a structure in which a die casting temperature measuring apparatus according to an embodiment of the present invention is installed.
3 is an exploded perspective view showing a die casting temperature measuring apparatus according to an embodiment of the present invention.
4 is a perspective view illustrating a die casting temperature measuring apparatus according to an embodiment of the present invention.
5 is a cross-sectional view of the ejector pin shown in FIG. 3 cut along the line A-A '.
FIG. 6 is a cross-sectional view of the ejector pin shown in FIG. 3 cut along the line B-B '.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference symbols whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 2 is a cross-sectional view showing a structure in which a die casting temperature measuring apparatus according to an embodiment of the present invention is installed. In order to measure the die casting temperature, an upper casting mold 20 contacting a surface of a casting And the measuring apparatus 100 is inserted and mounted.

The ejector pins 110 may be installed on the movable plate and the core, while the ejector pins 110 are provided on the upper mold 20 so as to move up and down together with the ejector plate 40.

A temperature measuring apparatus 100 is installed in an insertion hole into which an ejector pin SP provided in a conventional mold is inserted instead of forming a separate insertion hole in the mold for installing the temperature measuring apparatus 100 according to the present invention .

3 to 6 illustrate a die casting temperature measuring apparatus 100 according to an embodiment of the present invention. The temperature measuring apparatus 100 includes an ejector pin 110 and a temperature measuring sensor unit 120.

The ejector pin 110 is formed with a seating groove 112 in a longitudinal direction on one side thereof except for a certain thickness of a part of the front end portion 111 which is in contact with the casting 10 and a head portion 113 is formed in a rear end thereof . At this time, the tip of the ejector pin 110 is preferably in the range of 1 to 10 mm. If it is more than 10 mm, an error may occur in the measurement temperature of the casting, so the thinner the tip 111 is, the better

Here, the seating groove 112 is formed to extend to the head portion 113. At this time, since the seating groove extends to the head portion 113, the flat surface of the head portion 113 becomes a donut shape in which one side is cut.

The head portion 113 is formed in a donut shape in which one side is cut, so that there is an advantage that the temperature measurement sensor portion 120 that is seated in the seating groove 112 can be easily joined.

The rotation preventing member 114 is further formed on the outer circumferential surface of the head part 113 so as not to be coupled to the ejector plate 40 so that the ejector pin 110 can be accurately seated on the ejector plate 40, The rotation preventing member 114 is not rotated to prevent the twist of the cable for transmitting the measurement information of the temperature measurement sensor unit 120 to the external input means.

3) of the ejector pin 110 is in an L-shape with respect to the seating groove 112. The ejector pin 110 has a vertical section (B-B 'in FIG. 3) Is formed integrally with the ejector pin 110. [

That is, the ejector pin 110 does not have a separate structure that serves as a front end but retains the front end 111 of the ejector pin 110 itself.

In other words, the vertical cross section of the ejector pin 110 has an L shape. The ejection pin 110 is formed on the outer circumferential surface of the ejector pin 110 so that the mounting groove 112 can be exposed to the outside. ). ≪ / RTI >

It can be seen from the horizontal cross section of the ejector pin 110 (A-A 'in FIG. 3) that the tip end 111 of the ejector pin 110 is formed.

The tip inner side portion 112a of the ejector pin 110 can be visually confirmed as shown in FIG.

The temperature measuring apparatus 100 can accurately measure the temperature only when the tip thickness of the tip of the ejector pin 110 is equal to the thickness of the tip of the ejector pin 110. However, by forming the seating groove 112 on one side surface of the ejector pin 110, (112) and the thickness of the tip portion (111) can be made constant.

The temperature measurement sensor unit 120 is formed in a pin shape and is seated in the seating groove 112 of the ejector pin 110 and engaged with the ejector pin 110. The temperature measurement sensor unit 120 is inserted into the mold by the ejector pin 110, ) Is measured.

It is preferable that the temperature measurement sensor unit 120 is positioned within the outer periphery of the ejector pin 110 when the temperature measurement sensor unit 120 is seated in the seating groove 112 of the ejector pin 110.

That is, to be coupled to the inner circumference of the ejector pin 110 without being detached from the outer circumference of the ejector pin 110.

When the temperature measurement sensor unit 120 is placed in the inner peripheral edge of the ejector pin 110, the temperature measurement sensor unit 120 is inserted at the same time as the ejector pin 110 is inserted into the mold 20.

That is, the diameter or width of the seating groove 112 is formed to be larger than the diameter or width of the temperature measurement sensor unit 120, so that the seating recess 112 receives the temperature measurement sensor unit 120.

The temperature measurement sensor unit is composed of a thermocouple system which measures the thermal change obtained by the difference of electromotive force by bonding platinum (Pt) with rhodium (Rh) or platinum-rhodium alloy, and can measure the temperature, And is protected by a metal protection tube such as a stainless steel

At this time, the temperature measurement sensor unit 120 and the ejector pin 110 are integrally formed by welding.

The temperature measurement sensor unit 120 and the ejector pin 110 may be integrally welded together. However, the temperature sensor unit 120 and the ejector pin 110 may be fixed by partial welding.

If the temperature measurement signal line part 120 and the ejector pin 110 are not integrally formed, a space for moving the temperature measurement sensor part 120 is generated and the temperature measurement sensor part 120 moves inside the ejector pin 110, An accurate temperature value may not be measured if the measurement sensor unit 120 is spaced apart from the tip inner side portion 112a of the ejector pin 110. The tip portion 121 of the temperature measurement sensor unit 120 may be separated from the ejector pin And is fixedly attached to the tip inner side portion 112a of the base 110. [

The temperature measurement sensor unit 120 may be pushed to the front end portion 111 from the head portion 113 of the ejector pin 110 when the temperature measurement sensor unit 120 is fastened to the seating groove 112 of the ejector pin 110, 110 at the same time by fitting them together in the seating groove 112 formed in the longitudinal direction of the main body 110.

That is, the side surface of the ejector pin 110 can be fitted to the side surface of the temperature measurement sensor unit 120.

In order to prevent the temperature measurement sensor unit 120 from moving when the temperature measurement sensor unit 120 is fastened to the ejector pin 110, .

 Therefore, it is possible to reduce the machining cost of the mold and prevent the core from cracking due to the fact that it is not necessary to process a mold for installing a separate temperature measurement sensor. In addition, by replacing the ejector pin, The apparatus can be easily installed.

According to the present invention, there is an effect that a front end portion of a certain thickness can be formed by forming a seating groove on the side surface of the ejector pin on which the temperature measurement sensor is mounted.

Further, according to the present invention, there is an effect that the temperature measurement sensor portion can be easily coupled by the mounting groove formed in the longitudinal direction on the side surface of the ejector pin.

Further, the present invention has an effect that it is easy to grasp the state of the temperature measurement sensor unit from the outside without detaching the temperature measurement sensor unit from the ejector pin.

In addition, the present invention has the effect of increasing the accuracy of temperature measurement by fixing the temperature measuring sensor in close contact with the inner side of the tip of the ejector pin.

In addition, the present invention has an effect of preventing the twist of the cable that transmits the input information of the temperature measurement sensor unit to the external input means by the ejector pin being seated on the ejector plate by the rotation preventing member formed on either side of the outer periphery of the head .

The above-described die casting temperature measuring apparatus is not limited to the configuration and the operation manner of the embodiments described above. The above embodiments may be configured so that all or some of the embodiments may be selectively combined to make various modifications.

110: Ejector pin 111:
112: seat groove 112a: tip inner side
113: head part 114: anti-rotation member
120: temperature measurement sensor part 121: tip part

Claims (6)

A die casting temperature measuring apparatus comprising:
A temperature measurement sensor unit for measuring temperature; And
And an ejector pin having a seating groove formed in a longitudinal direction thereof except for a part of a front end portion thereof which is in contact with the casting and a head portion formed at a rear end thereof,
The temperature measurement sensor portion and the ejector pin are integrally formed, the mounting recess extending to the head portion, the temperature measurement sensor portion being seated in the mounting groove of the ejector pin,
And an anti-rotation member is formed on the outer circumferential surface of the head part so as to be coupled to the ejector plate so that the ejector pin is not rotated.
The method according to claim 1,
And the temperature measurement sensor part and the ejector pin are coupled by welding.
The method according to claim 1,
Wherein the vertical cross section of the ejector pin is L-shaped with respect to the seating groove.
delete The method according to claim 1,
Wherein an inner end portion of the tip end of the ejector pin and a tip end portion of the temperature measurement sensor portion are closely attached to each other.
The method according to claim 1,
Wherein the diameter of the head portion is larger than the diameter of the tip portion of the ejector pin.
KR1020150181553A 2015-12-18 2015-12-18 Temperature measuring device of die casting KR101757073B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150181553A KR101757073B1 (en) 2015-12-18 2015-12-18 Temperature measuring device of die casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150181553A KR101757073B1 (en) 2015-12-18 2015-12-18 Temperature measuring device of die casting

Publications (2)

Publication Number Publication Date
KR20170073765A KR20170073765A (en) 2017-06-29
KR101757073B1 true KR101757073B1 (en) 2017-07-13

Family

ID=59280127

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150181553A KR101757073B1 (en) 2015-12-18 2015-12-18 Temperature measuring device of die casting

Country Status (1)

Country Link
KR (1) KR101757073B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110672221A (en) * 2019-10-22 2020-01-10 福建工程学院 Metal weldment temperature field detection system and temperature detection method thereof
KR20230008974A (en) 2021-07-08 2023-01-17 한국생산기술연구원 Ejector module with temperature sensing function
KR20230016958A (en) 2021-07-27 2023-02-03 한국생산기술연구원 Ejector module with temperature sensing and part number markings

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109883563B (en) * 2019-03-27 2024-03-15 辽宁科技大学 Online temperature measuring device and method for surface of continuous casting billet
WO2023282527A1 (en) * 2021-07-08 2023-01-12 한국생산기술연구원 Ejector module
KR102542413B1 (en) * 2021-07-09 2023-06-13 한국생산기술연구원 Ejector module with part number markings

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010188412A (en) * 2009-02-20 2010-09-02 Aisin Seiki Co Ltd Casting apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010188412A (en) * 2009-02-20 2010-09-02 Aisin Seiki Co Ltd Casting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110672221A (en) * 2019-10-22 2020-01-10 福建工程学院 Metal weldment temperature field detection system and temperature detection method thereof
KR20230008974A (en) 2021-07-08 2023-01-17 한국생산기술연구원 Ejector module with temperature sensing function
KR102542412B1 (en) * 2021-07-08 2023-06-13 한국생산기술연구원 Ejector module with temperature sensing function
KR20230016958A (en) 2021-07-27 2023-02-03 한국생산기술연구원 Ejector module with temperature sensing and part number markings

Also Published As

Publication number Publication date
KR20170073765A (en) 2017-06-29

Similar Documents

Publication Publication Date Title
KR101757073B1 (en) Temperature measuring device of die casting
JP4945013B2 (en) Mold internal information measuring sensor
KR101131433B1 (en) Thermosensor for casting machine and casting machine
US10814540B2 (en) Method for evenly distributing plastic melt in a hot runner system using strain gauges
JP2017100454A (en) Method for installing indirect and direct mold pressure, temperature and flow front detection sensors without machining the mold
US10444092B2 (en) Upstream nozzle sensor for injection molding apparatus and methods of use
KR20090097154A (en) Hot-runner nozzle with temperature sensor
WO2005070592A1 (en) Casting machine
MX2008012680A (en) Hot runner nozzle.
KR20130005259U (en) Structure for installing temperature sensor of mold
CN105690676B (en) Injection molding apparatus with heated mold cavity
KR102542412B1 (en) Ejector module with temperature sensing function
US9427800B2 (en) Device for measuring pressures in a mold cavity of a casting mold that can be filled with melt, particularly a vacuum die-casting mold
JP5074976B2 (en) Resin temperature detector and injection molding machine
JP6184452B2 (en) Pin with pressure sensor and molding device
US10875229B2 (en) Melt temperature measurement system
JP2016087684A (en) Shrinkage measuring apparatus
JP7404956B2 (en) Manufacturing method for composite molded parts
JP3146454B2 (en) Measuring device for molten resin temperature
KR102542411B1 (en) Ejector module with temperature sensing and part number markings
JP7424763B2 (en) Temperature sensors and temperature measurement systems
JP6408328B2 (en) Die casting machine injection equipment
JP2020051990A (en) Casting mold device
JP2008249612A (en) Method of detecting generation of bur
JP2006095897A (en) Outer cylinder and mold assembly for molding the same

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant