KR20090090059A - Injection molding machine using thermo electric module - Google Patents
Injection molding machine using thermo electric module Download PDFInfo
- Publication number
- KR20090090059A KR20090090059A KR1020080015304A KR20080015304A KR20090090059A KR 20090090059 A KR20090090059 A KR 20090090059A KR 1020080015304 A KR1020080015304 A KR 1020080015304A KR 20080015304 A KR20080015304 A KR 20080015304A KR 20090090059 A KR20090090059 A KR 20090090059A
- Authority
- KR
- South Korea
- Prior art keywords
- molding machine
- thermoelectric element
- injection molding
- injection
- thermoelectric
- Prior art date
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 60
- 238000002347 injection Methods 0.000 claims abstract description 43
- 239000007924 injection Substances 0.000 claims abstract description 43
- 230000005679 Peltier effect Effects 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000012778 molding material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000005678 Seebeck effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000005676 thermoelectric effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
- B29C2045/2743—Electrical heating element constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76525—Electric current or voltage
Abstract
Description
The present invention relates to an injection molder using a thermoelectric element, and more particularly, an injection molder that enables the temperature control of cooling and heating to be concentrated by installing a plurality of thermoelectric elements locally at a predetermined position of the injection molder. It is about.
FIG. 1 is a view for explaining a conventional injection molding machine. In the case of most injection molding machines, a method of solidifying or curing the injection-molded molding material by injection molding the cavity into a cavity is used. At this time, when injection-molding the molding material heated and melted at a high temperature, the temperature of the injection molding machine also increases. In order to take out the injection-molded product from the injection molding machine, it is necessary to cool the injection mold sufficiently to solidify the injection-molded product. The cooling time of the mold is much longer than the filling time of the material, so the cooling time determines the production time of the injection-molded product. In the field, in order to manufacture more injection products, the injection molding machine is repeatedly performed for a long time without cooling the temperature of the injection mold machine. As a result, as time goes by, the inner parts of the cavity part and the core of the injection molding machine cannot be tolerated, and deformation or warpage may occur or breakage. In this case, the injection molded product manufactured in the injection molding machine is not properly injection molded, so that the defective rate of the injection molded product rises and the quality of the injection molded product deteriorates, and the damaged injection molding machine has to be replaced, resulting in replacement cost. . Thus, in order to reduce the injection molding time, that is, manufacturing cycle time while preventing such a problem, in the past, a cooling pipe or the like was installed inside the injection molding machine to supply cooling water to lower the temperature of the injection molding machine. However, the injection molding machine in which the cooling pipe is inserted is often subject to space constraints in a small-volume product or a complicated shape product, resulting in an increase in processing cost of the mold for inserting the cooling pipe. In addition, a separate complex cooling system, such as a water cooling system for cooling water supply, must be installed.
Moreover, in order to make the surface of the injection molded object to be shape | molded more smooth, and to improve quality, in the said injection molding machine, parts, such as a cavity part and a runner, may be heated, and may shape | mold and inject. At this time, the injection molding machine is rapidly heated using steam. However, even in this case, since the steam is to be supplied to the injection molding machine, not only an external device such as a heater must be installed, but also a space in which steam can be provided has a problem that the inside of the injection mold is complicated. In addition, due to the installation of each additional equipment, such as cooling equipment and steam equipment, there is a problem that not only the installation cost but also the management cost increases.
On the other hand, in the injection molding machine, when it is necessary to continuously maintain the heat locally, there is a case where a hot runner is used. In the case of the injection molding machine for manufacturing a small injection product, it is difficult to continuously heat the hot runner part. There are disadvantages. This is because the parts other than the hot runner should be cooled, because the injection mold machine for producing a small injection part is difficult to control the temperature because the parts to be cooled and the hot runner parts are too dense.
In the case of the injection molding machine, if the temperature of the mold is too low, a flow mark or weld line, which is a representative defect factor of the injection molded product, is frequently generated. The flow mark is a flow mark on the surface of the injection molded product, particularly around the gate and the final filling area, and the weld line is a representative defect phenomenon that occurs at the welded portion of the two flow tips of molten plastic in the injection mold. To say.
As a result, the injection molding machine is not only capable of cooling and heating locally, but also requires the introduction of an injection molding machine capable of cooling and heating without installing an external device such as a cooling pipe or a heater, in which internal design becomes complicated.
The present invention was devised to solve the conventional problems as described above, which is installed at a predetermined position of the injection molding machine, and is heated or cooled in one member without changing parts or equipment by only changing the current direction controlled through the controller unit. It is an object of the present invention to provide an injection molding machine using a thermoelectric element that molds and manufactures an injection molded product more efficiently by controlling a temperature freely through a thermoelectric element causing a phenomenon.
Injection molding machine using a thermoelectric element of the present invention for achieving the above object is injected into the injection molding machine and the injection molding after molding the heat-melted molding material through the cavity portion and the core of the lower plate formed on the inner surface of the upper plate The thermoelectric device may include: a thermoelectric element installed at a predetermined position of the injection mold and heating or cooling a predetermined position of the injection mold by using a Peltier effect; And a controller unit controlling the amount of current and the direction of current in the thermoelectric element.
In addition, the thermoelectric element is installed on the outer surface of the upper plate, characterized in that disposed to correspond to the cavity portion.
The thermoelectric device may be installed on an outer surface of a runner connected to the cavity part.
In addition, the thermoelectric element is characterized in that at least one is disposed.
The first effect of the injection molding machine using the thermoelectric element of the present invention is to control the voltage and current direction input to the anode of the thermoelectric element installed in the injection molding machine to heat or cool the injection mold more quickly to effectively control the temperature, For this reason, there is an advantage in that an injection molded product can be efficiently produced during injection molding.
In addition, the second effect of the present invention can be installed a plurality of thermoelectric elements can be heated and cooled only in the installed area to significantly lower the problem of defects, such as weld lines and flow marks, thereby reducing the reliability of the injection And there is an advantage to improve the quality.
In addition, the third effect of the present invention, there is no need to install a peripheral device such as a conventional heater or cooler, there is an advantage that can increase the space utilization more.
In addition, the fourth effect of the present invention does not need to complexly design the inside of the injection mold to use a cooling pipe or steam, thereby reducing the risk of failure of the injection mold, improving the process and ultimately reducing the manufacturing cost. It works.
In addition, the fifth effect of the present invention has the effect of shortening the time required for heating and cooling the injection molding machine to shorten the product production cycle to increase the output of the injection molded product.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.
In addition, when a part is said to "include" a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated.
Now, the injection molding machine using a thermoelectric device according to an embodiment of the present invention will be described in detail with reference to the drawings. The following terms are defined in consideration of functions in the present invention, which are intended to be used by users, operators, or customs. It may vary. Therefore, the definition should be made based on the contents throughout the present specification.
2 is a view for explaining an injection molding machine using a thermoelectric device according to the present invention. Briefly describing the injection molding machine, the injection molding machine is heated and melted on the basis of a mold base including an upper fixing plate, an upper plate that is a fixed side template, a lower plate that is a movable side template, a support plate, a space block, a fixing plate, and a runner. The molding material is injection-filled through the cavity part formed on the inner side of the upper plate and the core of the lower plate, and then solidified or cured to form an injection molded product. The present invention further includes a thermoelectric element and a controller unit in order to more rapidly cool and heat the injection molding machine having such a structure.
The thermoelectric element and the controller will be described in more detail.
The thermoelectric element is also called a Peltier element, a Thermo Electric Cooler (TEC), a Thermo Electric Module (TEM), etc., and is a generic term for a device using a phenomenon in which heat and electricity are converted to each other. In the present invention, by using the Peltier effect, the thermoelectric element receives a current in the anode line and the cathode line to serve as a so-called heat pump. In other words, it refers to a device that absorbs heat from a low temperature heat source and heats the high temperature heat source. At this time, in the present invention, by supplying the thermoelectric element in a direction different from the current supplied to the anode line and the cathode line, cooling or heating occurs. The structure and function of the thermoelectric device will be described in more detail with reference to FIG. 4.
In addition, the thermoelectric element may be installed at a predetermined position of the injection molding machine. This means that in the injection molding machine, the manager can cool and heat by installing intensively at a part to be cooled and heated. The thermoelectric element is mainly installed on the outer surface of the upper plate formed on the inner surface of the cavity, which is the site of the injection molded product in the injection mold, and the outer surface of the runner for supplying the molding material to the cavity and the hot runner. It is desirable to be. The cavity part is a space for molding the molding material melted in the injection molding machine into an injection molded product, and is a space that generates the most heat. For this reason, after molding the injection molded product, the cavity may be cooled immediately to manufacture the next injection molded product. In order to cool the cavity portion, the cavity portion is formed on the outer surface of the upper plate formed on the inner surface. By attaching and installing a thermoelectric element, the said cavity part can be heated and cooled.
In addition, the thermoelectric element may be composed of at least one or more. At this time, the manager may control the entire plurality of thermoelectric elements or control each thermoelectric element one by one using the controller unit.
This locally installable thermoelectric element can be installed in a large injection molding machine equipped with steam or cooling pipes, so that only the part where the thermoelectric element is installed can be intensively cooled or heated while using steam or cooling pipes more efficiently. It has the advantage of molding injection molded products.
On the other hand, the controller is connected to the thermoelectric element, the manager arbitrarily controls the amount of current and the current direction supplied to the thermoelectric element. As a result, the manager may arbitrarily adjust the heating or cooling temperature by adjusting the amount of current supplied to the thermoelectric element according to the working situation, and by controlling the current direction supplied to the thermoelectric element differently, each pole of the thermoelectric element may be adjusted in the current direction. Accordingly, the thermoelectric element is changed into a heat generating part or a heat absorbing part, thereby causing cooling and heating.
That is, the injection molding machine controls the current direction through the controller unit, so that the thermoelectric element is not only cooled but also heated, thereby making it possible to speed up the manufacturing cycle of the injection molding machine for molding an injection molded product. There is an advantage.
3 is a view for explaining an embodiment of an injection molding machine using a thermoelectric device according to the present invention, Figure 3 (a) is a front view of the cavity portion of the upper plate using a thermoelectric element, Figure 3 (b) is the injection mold machine Is a rear view showing the lower surface of the upper plate.
As shown in the drawing, a plurality of thermoelectric elements are inserted into and installed in a parallel arrangement on an outer surface of the upper plate to control the temperature of the cavity portion formed on the inner plate. At this time, in order to more effectively control the temperature it is preferable to install in the form of a checkerboard. This is to allow the cavity part to be evenly heated or cooled by the thermoelectric element installed in the form of a checkerboard.
The manager arbitrarily determines the amount of current through the controller unit and supplies the thermoelectric element to which the anode line and the cathode line are connected. do. For this reason, heat is transmitted from the pole which becomes a heat absorbing part to the pole which becomes a heat generating part. For example, when a manager connects a positive pole power to a positive pole and a negative pole to a negative pole, the cavity formed on the inner surface of the upper plate by the thermoelectric element is also heated. Afterwards, when the controller in the controller unit reverses the current direction and provides -DC power to the anode line and + DC power to the cathode line, the thermoelectric element generates a cooling action rather than heating to quickly cool the heated cavity portion. have.
In this manner, heating and cooling can be performed by installing the outer surface of the runner, the hot runner, etc., which are not the cavity part, thereby reducing the manufacturing cycle time of the injection molded product and significantly reducing the defective rate.
4 is a view showing an embodiment for explaining the structure and function of the thermoelectric device of the present invention. The thermoelectric element may include an element portion including a p-type thermoelectric semiconductor element and an n-type thermoelectric semiconductor element spaced apart from each other, and a metal electrode portion and a metal electrode portion respectively coupled to upper and lower surfaces of the element portions. It consists of a body portion including a thermally conductive electrically insulating thin film portion coupled to the outer surface. In addition, it includes a cathode wire and a cathode wire for supplying a current to the main body. Supplying a current to the thermoelectric element of such a structure generates a thermoelectric effect. The thermoelectric phenomenon refers to the conversion of energy between heat and electricity, and the electromotive force is generated when the carrier inside the device moves when there is a temperature difference between both ends of the conversion device. These thermoelectric phenomena can be classified into the Seebeck effect of obtaining electromotive force by using the temperature difference between the anodes, the Peltier effect of cooling and heating by electromotive force, and the Tomson effect of generating electromotive force by the temperature difference between conductors. Use the Peltier effect of heating. The Peltier effect is a phenomenon in which when the current is supplied through the anode line and the cathode line as described above, one pole becomes the heat generating portion and the other pole becomes the heat absorbing portion, and the flow of heat moves from the heat absorbing portion to the heat generating portion. In this case, if the polarity of the current is different, the heat absorbing portion and the heat generating portion have different roles, and the heat absorbing portion becomes the heat generating portion, and the heat generating portion becomes the heat absorbing portion, and thus the heating phenomenon is reversed and cooling occurs.
Although the present invention described above has been described in detail only with respect to the specific examples described, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical scope of the present invention, and such modifications and modifications belong to the appended claims.
1 is a view for explaining a conventional injection molding machine.
2 is a view for explaining an injection molding machine using a thermoelectric device according to the present invention.
3 is a view for explaining an embodiment of an injection molding machine using a thermoelectric device according to the present invention.
4 is a view showing an embodiment for explaining the structure of the thermoelectric device of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080015304A KR20090090059A (en) | 2008-02-20 | 2008-02-20 | Injection molding machine using thermo electric module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020080015304A KR20090090059A (en) | 2008-02-20 | 2008-02-20 | Injection molding machine using thermo electric module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20090090059A true KR20090090059A (en) | 2009-08-25 |
Family
ID=41208015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020080015304A KR20090090059A (en) | 2008-02-20 | 2008-02-20 | Injection molding machine using thermo electric module |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20090090059A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10549465B2 (en) | 2014-03-19 | 2020-02-04 | Sabic Global Technologies B.V. | Injection mold with thermoelectric elements |
-
2008
- 2008-02-20 KR KR1020080015304A patent/KR20090090059A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10549465B2 (en) | 2014-03-19 | 2020-02-04 | Sabic Global Technologies B.V. | Injection mold with thermoelectric elements |
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