JP2005178113A - Mold assembly and molding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold assembly of which the heat conductivity becomes constant at an arbitrary point of the boundary of a core and a member to which the core is fitted. <P>SOLUTION: In the mold assembly constituted so that a mold member (1, 2) having a temperature control pipe (5) integrally arranged thereto and the core (3) brought into contact with the mold member and constituting a part of a cavity (4) are provided in the conduction route of the heat conducting to the temperature control pipe from the cavity (4), a material (6) having viscosity bringing the core and the mold member into close contact with each other and having a heat conductivity higher than that of air is bonded to a contact region where the core and the mold member come into contact with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a mold apparatus, and more particularly to a technique for uniformizing the temperature of a cavity formed in the mold apparatus.

  As an apparatus for molding a molded product, an injection mold apparatus (hereinafter abbreviated as a mold apparatus) is known. In the mold apparatus, the unevenness that becomes the mold of the molded product is configured in advance on the movable side mold plate and the fixed side mold plate, and these mold plates are brought into contact with each other (clamped) to form the surface of the unevenness. A hollow space (cavity) is formed between these templates. A high temperature resin is poured into the cavity from the injection machine, and when the resin is filled in the cavity, the resin is cooled and solidified. Then, the movable side mold plate and the fixed side mold plate are opened to return to the original state, whereby it is possible to take out a molded product in which the shape of the unevenness is transferred to the resin surface.

  Depending on the type of the above mold apparatus, even when molding several types of shapes that differ only in part of the surface shape, various shapes can be obtained using the same mold apparatus by simply replacing the different parts. In some cases, a part or the whole of the cavity surface is configured by a detachable insert so that the above can be formed. And this nest | insert is mounted | worn with and used for the recessed part comprised in the said movable side template or the said fixed side template.

  The size of the recess is desirably such a size that the surface of the nest is in close contact with the surface of the recess when the cavity is filled with a high-temperature resin. However, if the concave portion is designed to be narrow with respect to the nest in advance, high temperature resin is filled in the cavity, so that the nest and the movable side mold plate or the fixed side mold plate in contact with the nest are thermally expanded. However, the insert itself is deformed by the force received from the inner wall of the recess. As a result, a part of the cavity surface formed by the nesting is distorted, and the accuracy of the molded product to be molded is significantly reduced. For this reason, a clearance (clearance) is provided between the insert and the concave portion formed in the movable side template or the fixed side template. However, this clearance size setting can accurately grasp the state of the above-mentioned nesting due to the effect of heat and radiation when the cavity is filled with high-temperature resin. Because it does not, it is set by guessing the state of its nesting.

  Furthermore, it is important to make the temperature distribution on the cavity surface portion uniform in order to accurately mold the molded product with the mold apparatus. The reason is that the temperature distribution on the cavity surface is non-uniform, which means that the nesting and the template that are in contact with the cavity surface are also distorted. This is because the accuracy of the remarkably deteriorates. In particular, in the molding of parts that require high accuracy, such as optical parts such as lenses, the distortion is more important because it leads to a direct factor in increasing the number of defective products. Therefore, a temperature adjusting tube for temperature adjustment is arranged around the cavity of the mold apparatus so that the temperature distribution around the cavity is uniform, and the temperature of the cavity is adjusted based on a predetermined program. It is.

  The temperature control tube is formed of a tubular hole having a cross section having a diameter of about 5 mm to 8 mm in the mold device, and a temperature control medium such as oil or water is passed through the hole. The temperature of the mold apparatus is adjusted by heat exchange with. However, this temperature control tube is generally not arranged up to the inside of the nesting when the mold apparatus has a nesting structure using the nesting. Therefore, in the mold apparatus having the nesting structure, the heat of the cavity surface portion in contact with the nesting surface is transmitted from the nesting surface through the inside of the nesting to the temperature control tube on the mold plate side.

In the mold apparatus having a nested structure as described above, when the heat of the cavity is transmitted to the temperature control tube via a plurality of members, further investigation is made to keep the temperature distribution on the cavity surface portion uniform. is necessary.
Japanese Patent Application Laid-Open No. 2003-25381 discloses a technique for suppressing deformation of the surface shape of the cavity due to temperature change or pressure difference.

In the above technique, the mirror surface mold member (nesting) is composed of a pressure-resistant region serving as a base, a creation region provided on the cavity side of the pressure-resistant region, and a heat conducting region provided on a side surface of the pressure-resistant region. As a result, the deformation of the insert due to pressure and temperature fluctuations during molding is prevented, and the temperature distribution of the insert surface portion in contact with the cavity surface is made uniform. Further, since the method of bringing the heat conducting region into close contact with the pressure resistant region is adopted, the quality of the molded product is not affected depending on the assembled state of each component.
Japanese Patent Laid-Open No. 2003-25381

  As described above, the insert is fitted into the concave portion of the movable side template or the fixed side template (collectively referred to as a template). For this reason, the said nest | insert and the said template are comprised by a different body, and a boundary surface exists between them. Therefore, when a molten resin, for example, is filled in the cavity formed at the time of mold clamping, heat generated from the molten resin is conducted through the nest and is provided to the mold plate via the boundary surface. Conducted to the temperature control medium in the temperature control tube. In the configuration disclosed in Japanese Unexamined Patent Publication No. 2003-25381, a high-conductivity member is used as the boundary member, and thus heat conduction in this region is considered good.

However, even if a material with good heat conductivity is used for the nesting boundary member, heat transfer from the cavity to the temperature control medium in the temperature control tube is hardly improved because heat transfer at the interface is extremely poor. This has been demonstrated by the inventors' experiments.
FIG. 4 is a graph of the demonstration data.

  The graph examines the temperature distribution at multiple points in the direction perpendicular to the boundary surface, based on the three different measurement points (measurement unit 1, measurement unit 2, and measurement unit 3) on the boundary surface. The horizontal axis shows the distance (unit: mm) from the boundary surface with the direction toward the inside of the nest being positive, and the vertical axis shows the measurement temperature (unit: ° C.). The measurement values at each measurement point were plotted with the measurement unit 1 as a diamond, the measurement unit 2 as a square, and the measurement unit 3 as a triangle.

  As can be seen from the inclination of the graph in the figure, the heat from the cavity is conducted inside the insert to the boundary surface with a predetermined inclination determined by the thermal conductivity of the material, and is conducted to the template via this boundary surface. At the same time, the heat transmitted to the template surface is drastically reduced due to the rapid heat insulation. In the template, heat conduction is performed with a predetermined inclination determined by the thermal conductivity of the material.

Further, when the various plots of the graph of FIG. 5 are observed well, it can be seen that the arrangement of the rhombus plot with respect to the measurement unit 1 and the triangle plot of the measurement unit 3 is reversed up and down with respect to the boundary surface.
When the state at the boundary surface (position from the contact surface = 0) is verified from this graph, in this example, the estimated temperature difference at the 0 position in the measurement unit 1 is 6.0, and the estimated temperature difference at the measurement unit 2 is 0. The estimated temperature difference at the position is 4.7, and the estimated temperature difference at the 0 position in the measurement unit 3 is 3.4. Then, when the variation in temperature difference is obtained at the 0 position at each measurement point from these estimated temperature differences, a large numerical result of 2.6 is obtained. From this result, it can be seen that the heat transfer rate varies depending on the position of the boundary surface.

The inventor believes that this fact can be verified by the following assumptions. For example, when stainless steels are brought into contact with each other, even if the roughness of their contact surfaces is Ra about 0.3 μm and they are pressed against each other at about 7 MPa (megapascals), these boundary surfaces The contact thermal resistance extends to 2 × 10 ⁴ m ² K / W (W is watts, m is meters, and K is Kelvin). Thus, even if the roughness of the surface is set to Ra of about 0.3 μm, the contact thermal resistance at the boundary surface is high because, when viewed finely, each contact surface has irregularities on the order of 0.1 μm. It can be considered that air enters the gaps between the irregularities to form a heat insulating layer. The thermal conductivity of air is always 0.028 W / mK, and air has only one-tenth the thermal conductivity compared to ceramics known as highly heat-insulating materials. That is, air provides a very large thermal insulation effect. Therefore, when air enters the gap, the air has a large heat insulating effect, and the heat transfer from the solid to the solid is greatly suppressed. Therefore, it can be considered that the temperature drop at the boundary surface in the graph is caused by an air layer formed on the boundary surface.

  Further, as described in the background art, a clearance is provided at the boundary surface between the insert and the template. For this reason, it is expected that the air layer at the boundary surface described above is further thickened. Moreover, due to this clearance, when the insert is assembled to the template, the contact state of the boundary surface is different every time it is assembled, and the contact of the boundary surface is a so-called consequent state. And the change of the thickness of the air layer by a boundary position is also estimated by the contact state. This change in the thickness of the air layer causes a difference in the heat transfer rate at each position on the boundary surface, resulting in a temperature distribution for the nesting. It can be considered that the reversal of the measured temperature before and after the boundary surface at the measurement point shown in the graph is caused in this way.

Since the contact thermal resistance is the reciprocal of the heat transfer coefficient, the heat transfer coefficient at the interface is 5 × 10 ⁻⁵ W / (m ² K). When this is converted from the total thermal resistance between the nesting and the temperature control medium in the temperature control tube configured in the template, a thermal resistance of about 80% or more of the total is generated at this boundary surface. . That is, in order to efficiently conduct the heat of the cavity to the temperature control medium of the temperature control tube, it is understood that the first consideration is to improve the thermal resistance at the boundary surface.

In the above, the problem has been analyzed by taking the injection mold apparatus as an example. However, the problem is not limited to the injection mold apparatus, and any problem can be achieved with any type of mold apparatus as long as the mold apparatus has a nested structure. It goes without saying that applies.
Therefore, the present invention provides a mold apparatus in which the heat transfer rate is constant at an arbitrary point of the boundary between the insert and the member fitting the insert, and a molded product having a constant heat transfer rate at the arbitrary point of the boundary. It aims at providing the shaping | molding method to shape | mold.

In order to solve the above problems, the present invention is configured as follows.
One aspect of the mold apparatus according to the present invention is a mold member (for example, a fixed-side mold plate or a movable mold) in which the temperature control pipe is integrally disposed in a heat conduction path transmitted from the cavity to the temperature control pipe. Side mold plate and the like, and a nest that abuts the mold member and forms a part of the cavity, the abutment area where the nest and the mold member abut each other is A material having a viscosity for adhering the nest and the mold member to each other and having a higher thermal conductivity than air is attached.

  Here, the nest abutting on the mold member is a state in which a part of the surface of the nest faces the part of the surface of the mold member and is arranged in contact with each other or through a minute clearance. Nested. The contact area refers to a gap formed between the surfaces of the nesting and the mold member facing each other (in other words, a boundary region between the nesting and the mold member). I'm pointing.

  It should be noted that the material having a viscosity that allows the insert and the mold member to adhere to each other has a viscosity that allows the material to enter a non-contact portion of the contact region when the material is attached to the contact region. During molding of a molded product by the mold apparatus, it is desirable that the material has a viscosity that prevents the material from leaking from the non-contact portion.

  Here, the non-contact area is a non-contact area between the surface of the nesting and the surface of the mold member generated due to the clearance, and the surface of the nesting or the surface of the mold member A non-contact region generated due to minute unevenness (for example, unevenness on the order of submicron) formed on the substrate is indicated.

  The range of the viscosity X in which the material enters the non-contact portion of the contact region is expressed by 0.001 Pa · s <X <20 Pa and 4000 Pa · s at 20 ° C. The range of the viscosity Y that does not leak is preferably 0.5 Pa · s <Y <150 ° C. at 150 ° C. and 1 MPa · s.

  One of the other aspects of the mold apparatus of the present invention includes a mold member in which the temperature control pipe is integrally disposed in a heat conduction path transmitted from the cavity to the temperature control pipe, and On the premise of providing a nest that abuts on the mold member and forms a part of the cavity, the nest and the mold member are in contact with each other at each position of the abutment region. And the material which acts so that the heat transfer rate of the said mold member may become fixed is adhered.

In all the above embodiments, it is desirable that the contact area is an entire area where the insert and the mold member are in contact with each other.
Further, the range of the heat transfer coefficient value α is expressed by at least 1 × 10 × 10 ³ W / m ² K <α <1 × 30 × 10 ³ W / m ² K.

The range of the thermal conductivity value k is represented by at least 0.05 W / mK <k <40 W / mK.
One of the molding methods of the present invention includes a mold member in which the temperature control pipe is integrally disposed in a conduction path of heat transmitted from the cavity to the temperature control pipe, and abuts against the mold member. In addition, the insert and the mold member are provided in a contact region where the insert and the mold member are in contact with each other on the premise that the mold apparatus includes a insert that constitutes a part of the cavity. A material having a viscosity for adhering to each other and a thermal conductivity higher than that of air is adhered, and a molded product is molded in a state where the material is adhered.

  Further, another one of the molding methods of the present invention includes a mold member in which the temperature control pipe is integrally disposed in a heat conduction path transmitted from the cavity to the temperature control pipe, and the mold Assuming that the present invention is applied to a mold apparatus having a nest that abuts against a member and forms a part of the cavity, the abutment is brought into contact with the abutment region where the nest and the mold member abut against each other. At each position in the region, a material that acts so that the heat transfer coefficient of the nesting and the mold member is constant is adhered, and the molded product is molded with the material adhered.

  In the present invention, there is a viscosity that allows the nesting and the mold member to be in close contact with each other in a contact region between the mold member in which the temperature control tube is integrally disposed and the nesting that constitutes a part of the cavity. In addition, a material having a higher thermal conductivity than air, or a material that acts so that the heat transfer coefficient of the insert and the mold member is constant at each position of the contact region is attached.

  Thus, the amount of heat transferred from the nest to the mold member through the contact region is changed by replacing the material having low heat conductivity existing in the contact region with the material having high thermal conductivity. In addition, the heat transfer coefficient at an arbitrary position of the contact area becomes uniform.

As described above, according to the present invention, since the heat transfer capability between the cavity and the temperature control tube is improved, temperature control in the mold apparatus can be performed efficiently. Along with this, shortening of molding time and saving of power consumption can be expected.
Further, since the heat transfer coefficient becomes uniform at an arbitrary position in the contact area between the insert and the mold member, variation in temperature distribution in the cavity is reduced. Thereby, the production | generation of a highly accurate molded article is realizable.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram for explaining an example of a mold apparatus according to an embodiment of the present invention.
FIG. 4A is a view of a horizontal cross section at a cavity position of a horizontal injection mold apparatus (hereinafter abbreviated as a mold apparatus) in a clamped state as viewed from above.

FIG. 2B is an enlarged view of a region surrounded by a circular broken line with respect to the mold apparatus of FIG.
For the sake of easy understanding, only the characteristic parts are emphasized in the figure.

FIG. 2A shows the fixed side mold plate 1, the movable side mold plate 2, the insert 3, the cavity 4, the temperature control tube 5, and the contact member 6.
The fixed-side template 1 has a recess 7 on the surface facing the movable-side template 2, and the insert 3 is fitted in the recess 7. The stationary side template 1 is fixed at this position even during operation of the mold apparatus.

The movable side template 2 has a recess 7 on the surface facing the fixed side template 1, as in the case of the fixed side template 1, and the insert 3 is fitted in the recess 7. When the mold apparatus is in operation, the movable side mold plate 2 is moved in the vertical direction in the drawing with the position of the boundary line A in the drawing (a) as the upper end.
The contact member 6 is filled between the surface of the concave portion 7 of each of the mold plates 1 and 2 and the surface of each nesting 3 facing the concave portion 7 as indicated by oblique lines in FIG.

Although only the cross section of the temperature control tube 5 is shown in FIG. 5A, it is routed inside the fixed side mold plate 1 and the movable side mold plate 2 of the mold apparatus, and a control unit (not shown). The temperature control medium such as water and oil flows from the front side to the back side or from the back side to the front side in FIG.
In this mold apparatus, when the movable side mold plate 2 is brought into a state of clamping with the fixed side mold plate 1 as shown in the figure, a hollow space is formed between the fixed side mold plate 1 and the movable side mold plate 2. (Cavity 4) is formed. Although not shown in the figure, molten resin is injected from an injection machine configured in the upper part of the figure, and the molten resin is melted via a sub-blue or runner (not shown) that guides the injected resin into the cavity 4. The filled resin is filled in the cavity 4.

  When it is detected by a timer or sensor that the cavity 4 is filled with resin, the cavity 4 is cooled and the resin in the cavity 4 is solidified. Thereby, the surface shape constituted by the insert 3 and the mold plates 1 and 2 constituting the cavity 4 is transferred to the surface of the resin, and a molded product is completed.

  During this time, the temperature adjustment of the cavity 4 by the temperature adjusting tube 5 is performed as follows. It is realized by conducting to the temperature control medium of the temperature control tube 5 by once transmitting from the insert 3 to the mold plates 1 and 2 through the contact member 6 once.

  When the molded product is completed as described above, the movable side mold plate 2 moves downward from the boundary line A in the figure and separates from the fixed side mold plate 1. At this time, the molded product leaves the fixed-side mold plate 1 while being in close contact with the movable-side mold plate 2, and finally, by a push-up of an unillustrated detachable pin configured inside the movable-side mold plate 2 on the back of the molded product Then, the molded product is extruded from the movable side mold plate 2, and the molded product is taken out from the mold apparatus.

The contact member 6 described above is a member that can improve the heat transfer coefficient between the insert 3 and the templates 1 and 2 by interposing the member 6, and a member that satisfies the conditions described below is used. ing.
At least one of the surface of the nesting 3 or the surface of the concave portion 7 of the mold plates 1 and 2 has a submicron-order unevenness 8 as shown in FIG. Even if the surfaces are brought into contact with each other, a minute gap 9 is generated at the boundary. Further, because of the clearance between the insert 3 and the mold plates 1 and 2 provided at the time of designing, a clearance is generated depending on the position. Therefore, as the material of the member 6, a material having a viscosity sufficient to fill a part or the whole of the gap 9 is effective (condition 1). As a material satisfying the condition 1, it is preferable that the assembly viscosity when the insert 3 is assembled in the recesses 7 of the mold plates 1 and 2 is 4000 Pa · s (Pascal second) or less at 20 ° C. The lower limit is effective up to about 0.001 Pa · s at 20 ° C.

  On the other hand, when the insert 3 is assembled in the recesses 7 of the mold plates 1 and 2 to operate the mold apparatus and the cavity 4 is filled with resin, the inside of the cavity naturally becomes high temperature. The type in which the inside of 4 is filled with resin acts so that the insert 3 is pressed against the mold plates 1 and 2 by the pressure of the resin. For this reason, if the viscosity of the member 6 applied between the insert 3 and the recesses 7 of the mold plates 1 and 2 is extremely low, the member 6 will penetrate into the cavity 4 when the cavity 4 is filled with resin. It will be put out. Therefore, as the material of the member 6, a material whose viscosity does not decrease in a high temperature state is effective (condition 2). As a material satisfying the condition 2, a material of 0.5 Pa · s or more at 150 ° C. is effective. The upper limit is effective up to about 1 MPa · s (megapascal second) at 150 ° C.

  Of the materials satisfying the above conditions 1 and 2, the present inventor intervenes the material 9 between the insert 3 and the templates 1 and 2 through actual experiments. The heat transfer coefficient between the nesting 3 and the mold plates 1 and 2 is improved by silicone grease, silicone adhesive, heat dissipation silicone grease, epoxy adhesive, and epoxy pipe sealant (the pipe sealant is a gasket). Called).

From this experiment, it was shown that the material having the following heat transfer coefficient or heat conductivity is effective.
Range of heat transfer coefficient α: 1 × 10 × 10 ³ W / m ² K <α <1 × 30 × 10 ³ W / m ² K
Range of thermal conductivity value k: 0.05 W / mK <k <40 W / mK
However, W is watt, m is meter, and K is Kelvin.

Further, as estimated from the above-mentioned assumptions of the present inventor, the materials for which the improvement of the heat transfer coefficient is desired include silicone oil, modified silicone oil, silicone adhesive, silicone resin, silicone elastomer, and epoxy grease. Can be mentioned.
Below, based on the demonstration data at the time of using the said contact | adherence member 6, the effect of a heat transfer rate improvement is demonstrated.

  In this example, when the contact member 6 is applied to a region of the surface of the insert 3 that is abutted with the surfaces of the templates 1 and 2, and the contact member 6 protrudes into the cavity 4. The contact member 6 was interposed between the insert 3 and the templates 1 and 2 by wiping it. Further, the method of interposing the contact member 6 between the insert 3 and the mold plates 1 and 2 is such that the contact between the surfaces of the mold plates 1 and 2 and the surface of the insert 3 that abuts each other. The member 6 may be applied, or the contact member 6 may be applied to the surfaces of the templates 1 and 2 and the surface of the insert 3. Further, as a method of interposing the contact member 6 between the insert 3 and the templates 1 and 2, a known means may be appropriately applied in addition to the method described above.

And this measurement implemented in this way is a measurement on the same conditions as the measurement data of FIG. 4 used for the conventional description except having used the said contact | adherence member 6 for the said boundary.
FIG. 2 is a diagram showing temperature measurement points in the vicinity of the boundary between the insert 3 and the template 2 of the mold apparatus shown in FIG. In addition, each component of the figure is attached with the same symbol in the same place as FIG.

  In this measurement, the configuration of the lower half of the boundary line A shown in the mold apparatus of FIG. 1A is a measurement object, and on the boundary surface between the nesting 3 and the template 2 as in the measurement point shown in FIG. Based on three measurement points (measurement unit 1, measurement unit 2, and measurement unit 3), temperature distribution is measured at a plurality of locations in a direction orthogonal to the boundary surface.

  FIG. 3 is a graph of measured values at the above measurement points, and this graph is also the same as the graph of FIG. 4. The measured temperature (unit: ° C.) is shown on the vertical axis. For easy comparison with the graph of FIG. 4, the measurement values at each measurement point are plotted with a diamond shape of the measurement unit 1, a square shape of the measurement unit 2, and a measurement unit 3. Plotted with triangles.

  As is clear from the graph, the heat transfer from the inside of the nesting to the inside of the template shown in the right-to-left direction of the graph is as expected at the boundary (distance from the contact area = 0). Shows the results. That is, when the graph is analyzed for each measurement part, the temperature at the boundary (the distance from the contact area = 0 position) predicted from all the measurement values measured at each position inside the nesting 3 is opposite to the template. 2 The temperature at the boundary predicted from all the measured values measured at each position in the interior substantially matches each measurement unit. When this is specifically indicated by a numerical value, in this example, the estimated temperature difference at the 0 position in the measurement unit 1 is 1.3, and the estimated temperature difference at the 0 position in the measurement unit 2 is 1.4. The estimated temperature difference at the 0 position in the measurement unit 3 was 1.3. And when the variation of the temperature difference was calculated | required in 0 position from these estimated temperature differences, the result of 0.1 was obtained.

  Therefore, when the contact member 6 is applied to the boundary between the insert 3 and the template 2, the thermal insulation action at the boundary is greatly reduced as shown by the estimated temperature difference, and further, the temperature difference varies. As shown, the result can be a constant heat transfer rate at any point on the boundary.

  This result also proves that the above-described assumption of the inventor, that is, the heat insulation effect by the air layer formed at the boundary is replaced by the heat conduction effect by filling the air layer with the contact member 6. Can result. Naturally, if a material with high heat conductivity occupies that area instead of an air layer that produces a heat insulation effect, heat will be transmitted more easily, and furthermore, the distance between the nesting surface and the template surface where the influence of the heat insulation effect will be noticeable. Since the difference between the nesting plate and the template is negligible, there is little change in the heat transfer effect due to the difference in the contact state between the nesting plate and the template.

In view of these points, it is apparent that not only the above-mentioned various materials that have been verified, but also other materials that satisfy the above-mentioned two conditions can derive the above results.
In this example, assuming that there are two types of members formed between the heat paths from the cavity to the temperature control tube, the contact member 6 is interposed at the boundary between the two types of members. As described above, even if there are three or more members configured between the heat paths from the cavity to the temperature control tube, the above-described effects can be obtained by interposing the contact member 6 at the boundary between the members. I can do things.

  In this example, the injection mold apparatus has been described as an example. However, other types may be used as long as two or more members are configured between the cavity and the temperature control tube. Even in this type of mold apparatus, the above-described effects can be obtained by filling the contact member in the boundary region between the two members.

  As described above, in the embodiment of the present invention, the heat transfer coefficient at the boundary between two members (for example, the insert and the template) is greatly increased regardless of the assembled state, and the heat transfer coefficient at an arbitrary point of the boundary is substantially constant. It becomes possible to. As a result, the temperature in the cavity filled with the molten resin can be efficiently cooled, and the time for solidifying the molded product can be shortened. In addition, it is possible to make uniform the temperature distribution in the surface of the nest that constitutes a part of the cavity and also in the cavity. For example, it is possible to mold a molded product that requires high accuracy such as an optical component. However, it becomes possible to mold with higher accuracy than ever. Moreover, it can prevent that a nesting remove | deviates from the recessed part of a template carelessly by apply | coating the said contact | adherence member between the nesting and the recessed part of a template.

  In the above, the description has been made taking the injection mold apparatus as an example as the best mode for carrying out this embodiment. However, it goes without saying that the technique described above can be applied to any type of mold apparatus as long as it is a mold apparatus having a nested structure as well as an injection mold apparatus, and a sympathetic effect can be obtained. Yes.

It is a figure for demonstrating an example of the metal mold | die apparatus in embodiment of this invention. It is a figure which shows the measurement point of the temperature in the boundary vicinity of the nest | insert of a metal mold | die apparatus shown to Fig.1 (a), and a template. FIG. 3 is a graph of measurement temperatures at measurement points shown in FIG. 2. In the conventional mold apparatus, the measurement temperature in the same position as the measurement point shown by FIG. 2 is graphed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed side template 2 Movable side template 3 Nesting 4 Cavity 5 Temperature control tube 6 Adhering member

Claims (9)

A mold member in which the temperature control pipe is integrally disposed in a conduction path of heat transmitted from the cavity to the temperature control pipe, and a nest that is in contact with the mold member and forms a part of the cavity A mold apparatus comprising:
In the contact area where the insert and the mold member are in contact with each other, a material having a viscosity that causes the insert and the mold member to adhere to each other and having a higher thermal conductivity than air is attached.
A mold apparatus characterized by that.   The material having a viscosity that causes the insert and the mold member to adhere to each other has a viscosity that allows the material to enter a non-contact portion of the contact region when the material is attached to the contact region, 2. The mold apparatus according to claim 1, wherein the mold apparatus is a material having a viscosity that prevents the material from leaking from the non-contact portion during molding of a molded product by the mold apparatus.   The viscosity X range in which the material enters the non-contact portion of the contact region is indicated by 0.001 Pa · s <X <20 ° C. and 4000 Pa · s at 20 ° C. 3. The mold apparatus according to claim 2, wherein the range of the viscosity Y that does not leak is indicated by 0.5 Pa · s <Y <150 ° C. and 1 MPa · s at 150 ° C. 4. A mold member in which the temperature control pipe is integrally disposed in a conduction path of heat transmitted from the cavity to the temperature control pipe, and a nest that is in contact with the mold member and forms a part of the cavity A mold apparatus comprising:
A material that acts so that the heat transfer coefficient of the insert and the mold member is constant at each position of the contact area is attached to the contact area where the insert and the mold member are in contact with each other.
A mold apparatus characterized by that.   The mold apparatus according to claim 1, wherein the contact area is an entire area where the insert and the mold member are in contact with each other. The range of the value α of the heat transfer coefficient is represented by 1 × 10 × 10 ³ W / m ² K <α <1 × 30 × 10 ³ W / m ² K. 5. Mold equipment.   4. The mold apparatus according to claim 1, wherein the range of the thermal conductivity value k is represented by 0.05 W / mK <k <40 W / mK. A mold member in which the temperature control pipe is integrally disposed in a conduction path of heat transmitted from the cavity to the temperature control pipe, and a nest that is in contact with the mold member and forms a part of the cavity A molding method applied to a mold apparatus comprising:
A material having a viscosity higher than air and a viscosity that causes the nest and the mold member to adhere to each other is attached to a contact area where the nest and the mold member abut each other.
Molding of the molded product with the material attached,
A molding method characterized by the above. A mold member in which the temperature control pipe is integrally disposed in a conduction path of heat transmitted from the cavity to the temperature control pipe, and a nest that is in contact with the mold member and forms a part of the cavity A molding method applied to a mold apparatus comprising:
A material that acts so that the heat transfer coefficient of the nest and the mold member is constant at each position of the abutment region is attached to a contact area where the nest and the mold member abut each other.
Molding of the molded product with the material attached,
A molding method characterized by the above.

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