JP5803772B2 - Insert molding method - Google Patents

Description

The present invention relates Inserts molding method.

  As a resin molded product, pre-prepared parts are held (inserted) in a mold attached to an injection molding apparatus, and then the mold is clamped, and a molten resin is injected and filled into the formed mold cavity. There is known an insert molding method in which the component and the resin are integrally molded in the mold cavity. Generally, this part supplied from outside the injection molding apparatus and held in the mold is called an insert part, and a resin molded part molded by the insert molding method is called an insert molded part. Insert molded products are often used in parts such as automobiles, home appliances, and OA devices because the functions of insert parts that are integrally molded with resin can be imparted to resin molded products.

  As materials for insert parts, various materials such as functional resin materials, ceramic materials and metal materials for the purpose of imparting various functions such as heat resistance, weather resistance, and high strength are used according to the purpose and purpose. Is done. Insert parts are not limited to the type of material, but are encapsulated in the resin, or a part or the entire surface of the insert part is exposed and integrally formed with the resin in various states. There are various forms such as those processed by machining or pressing, those processed from various materials, or processed into a sheet shape in accordance with the application and purpose.

  Here, in the insert molding method, it is necessary to consider the difference in linear expansion coefficient (thermal expansion coefficient or thermal contraction coefficient) and temperature change environment of each material of the insert part and the resin portion. Because, generally, when a material is heated or cooled, the amount of thermal expansion (thermal expansion coefficient) or the amount of thermal contraction (thermal contraction rate) of the material depends on the linear expansion coefficient or temperature change amount inherent to the material. This is because it is proportional. Therefore, if the materials have different linear expansion coefficients with respect to the same shape and the same volume of a plurality of materials, the thermal expansion amount and the thermal contraction amount of each material are the same for each line even under the same temperature change environment. Even in the case of materials having the same linear expansion coefficient that differ in proportion to the difference in expansion coefficient, the thermal expansion amount and the thermal contraction amount of each material are different from each other in the linear expansion coefficient under different temperature change environments. It is different in proportion to the difference. Naturally, if materials having different linear expansion coefficients are in different temperature change environments, the thermal expansion amount and the thermal shrinkage amount of each material differ in proportion to the product of the respective differences. In this way, due to differences in the linear expansion coefficient and temperature change environment specific to the material of each of the insert part and the resin part, a difference occurs in the amount of thermal expansion or heat shrinkage of each material. Internal stress is generated on the joint surface between the resin part and the resin part. In particular, when the material of the insert part is significantly different from the molten resin used for molding, such as metal materials or non-metal materials (such as ceramics) excluding resin, Under a temperature change environment during use, an internal stress proportional to the difference between the respective linear expansion coefficients is generated. Further, in the cooling and solidification step of the insert molding method, the temperatures of the insert part that is held in the mold cavity in the cold state and heated by the molten resin, and the resin part that is injected and filled in the molten state and is cooled and solidified. Internal stress is generated by further integrating the differences in the changing environment. For this reason, there is a problem that molding defects such as deformation of the insert molded product, cracking of the resin part, delamination between the insert part and the resin part, and the like are likely to occur during use or immediately after insert molding.

Specifically, when considering the temperature change environment during use of the insert molded product, whether it can actually be used in that state is another problem, but on the high temperature side, the resin part can keep its shape, resin The upper limit is the heat distortion temperature or melting point temperature (glass transition temperature in the case of amorphous resin) of the material. For example, when a polycarbonate resin (PC) is used as the resin material, the glass transition temperature = about 140. ° C. On the other hand, although it is not a limit of use, if the low temperature side is room temperature (about 20 ° C), the maximum temperature change is 120 ° C, and the insert part and the resin part are the same during use of the insert molded product. Under temperature change environment. On the other hand, when an iron-based material (Fe) is used for the insert part, the linear expansion coefficient of iron ("× ^10-6 ") = about 11.7, the linear expansion coefficient of PC resin (" ^x10-6 ") ) = About 66, the difference in thermal expansion amount or thermal shrinkage amount between the insert part and the resin portion due to temperature change is about 6 times. Here, by adding glass fiber or the like to the resin material to reduce the linear expansion coefficient, it is also possible to reduce the difference in the linear expansion coefficient from the insert part. For example, by reducing the linear expansion coefficient (“× 10 ⁻⁶ ”) of the PC resin to about 23 by adding glass fiber, the difference between the respective linear expansion coefficients is about doubled.

  However, as described above, with respect to the insert molded product, the internal stress caused by the difference in the coefficient of linear expansion of the material of the insert part and the resin part becomes a problem. It is in the cooling and solidifying step of the insert molding method under the temperature change environment that is different from each other than during use of the underlying insert molded product. Specifically, for resin materials, if the molding temperature of the PC resin (plasticization melting temperature) = about 300 ° C. and the product take-out temperature = about 100 ° C., the maximum temperature change is 200 ° C. It is about twice the width of the temperature change (120 ° C.) during use of the molded product. Further, since the temperature is lowered, the volume of the resin portion changes in a shrinking direction. On the other hand, insert parts are generally supplied in a cold state and are held in a mold cavity. Therefore, if it is heated from the previous room temperature (about 20 ° C.) with a molten resin of about 300 ° C. and finally reaches the previous product removal temperature (about 100 ° C.), the width of the temperature change of the insert part is the maximum 80 ° C. Therefore, the temperature change width (about 200 ° C.) of the resin part is about twice the temperature change width (about 80 ° C.) of the insert part, and the volume expands contrary to the resin part. Change direction. As in this example, in the cooling and solidifying step of the insert molding method, the thermal expansion amount and thermal shrinkage amount of the insert part and the resin portion are doubled by simple calculation due to the difference in the linear expansion coefficient and the temperature change environment. In some cases, the difference may be about 4 times, twice, and the volume change due to the difference is the opposite of expansion and contraction, so the internal stress generated on the joint surface between the insert part and the resin part cannot be ignored. It becomes. That is, in an insert molded product, in the cooling and solidifying step of the insert molding method, the difference in thermal expansion and thermal shrinkage between the insert part and the resin part (resin material), or the reduction of internal stress due to the difference, It can be said that it affects quality.

  Inserts such as adhesives with excellent adhesion to resin materials for the purpose of reducing the difference in thermal expansion or thermal shrinkage between insert parts and resin parts (resin materials) in the cooling and solidification process of the insert molding method Pre-application to parts, increase of contact area with molten resin, and roughening treatment of insert part surface for the purpose of obtaining anchor effect by molten resin intrusion into uneven part of insert part surface, and insert part For the same purpose as the surface roughening treatment, to delay the formation of a cooling solidified layer (skin layer) formed on the surface of the molten resin when in contact with the molten resin, and to make the molten resin follow the uneven shape on the surface of the insert part. A method of heating the insert part in advance has been proposed. However, neither method directly reduces the internal stress due to the difference in thermal expansion amount or thermal shrinkage amount between the insert part and the resin part, and increases the man-hours before and after the molding process and the man-hours during the molding process. There is a problem. In addition, with regard to the method of preheating the insert part, which is one of those proposals, it is difficult to perform uniform heating, or until the heated insert part is held (inserted) in the mold cavity and injection filled. Due to the temperature drop, the desired metal insert part temperature cannot be obtained, the heating time for heating to a high temperature, or the high temperature to cool and solidify the molten resin in the mold cavity as the insert part is heated There are various problems such as a long cooling time for cooling the heated mold.

  In addition, since conventional insert molded products are manufactured using different devices, the insert parts are manufactured, stored, managed and compared to the molding process of ordinary resin molded products. Since there are many processes such as transporting to the injection molding machine, and holding (inserting) the insert part in the mold cavity of the mold attached to the injection molding machine during the molding cycle of the insert molded product. In general, man-hours, time and costs are required. In addition, in the insert molded product in which the insert part is integrally formed so as to constitute the entire design surface or a part of the design surface of the resin molded product, the insert part is substantially the same size as the molded product, and a sheet such as a metal plate In order to manufacture these insert parts from the shape of the material, a press die that is approximately the same size as the mold used for insert molding and a large press machine that can use these press dies are required. become.

  In Patent Document 1, in insert molding in which a metal insert part is embedded with a thermoplastic resin, the temperature of the metal insert part at the time of contact with the resin is determined by heating the metal insert part in a mold. An insert molding method is disclosed in which a predetermined time is controlled within a temperature range above the melting point or softening point. As a method of heating the metal insert part in the mold, both ends of the metal insert part are exposed to the outside of the molded product, and the mold is electrically insulated from the metal insert part. A method of energizing and a method of using a heating element set in a mold are mentioned, and it is said that excellent adhesion between the insert part and the resin can be ensured.

  Further, in Patent Document 2, an insert part is manufactured from a metal strip-shaped plate material by press working, and a press working part arranged in series between a fixed base and a movable base that are arranged to be openable and closable. Then, the metal strip-shaped plate material is conveyed to the insert molding part and the shearing part, and the manufacture of the insert part (cold pressing of the plate material) and the conveyance and holding of the manufactured insert part in the mold cavity ( An apparatus for manufacturing a molded article is disclosed, which can perform insert), insert molding, and separation of the insert molded article from the plate material continuously with one apparatus.

JP 2004-249681 A Japanese Patent Application Laid-Open No. 07-024869

  However, like the insert molding method and insert molding die of Patent Document 1, the insert molding process (after the insert part heating process for heating the insert part is completed in one set of molds forming the mold cavity ( In the form where injection molding in insert molding is performed (from the molten resin in the mold cavity until it is cooled and solidified), it is difficult to perform these steps or a part of the steps in the mold. . That is, there is a problem that the molding cycle of the metal insert molded product becomes longer for the process of heating the insert part before injection molding.

  Moreover, in the manufacturing apparatus of the molded article described in Patent Document 2, a part in which each step is performed in a state in which a metal insert part pressed from a metal strip-shaped plate material is connected to the plate material at a connection portion. In other words, in order to convey one after another to the press working part, insert molding part, shearing part, manufacture by press working of metal insert parts and insert molding to hold this in the mold cavity and integrally form by injection filling This can be done with one device. Further, the process of holding (inserting) the metal insert part in the mold cavity is easily automated in the same apparatus. However, the molded article manufacturing apparatus described in Patent Document 2 has the following problems due to its form.

  First, there is a problem resulting from the fact that the parts (the press working part, the insert forming part, and the shearing part) that perform each process necessary for insert molding are arranged in series between the movable base and the fixed base. Since the molds for the three processes described above are arranged in series on one mold mounting surface, the size of the insert molded product that can be molded must be smaller than the size of the apparatus or the mold mounting surface. Absent. In other words, when the size of the insert molded product to be molded is increased, it is necessary to further increase the size of the apparatus or the die mounting surface. Furthermore, three sets of molds for press processing, insert molding, and shearing are required for molding one type of insert molded product.

  Another problem is that the molded article manufacturing apparatus described in Patent Document 2 is not a general-purpose injection molding apparatus but an insert molding dedicated manufacturing apparatus with restrictions on the material and form of insert parts. This problem is not a problem in forming a metal insert molded article suitable for the present apparatus. However, the limitation of molding objects in recent multi-volume production is a big problem for resin molded product manufacturers. For example, when the insert part is a part that cannot be manufactured from a metal strip-like plate material by press working, the press working part and the shearing part of the production apparatus do not contribute to insert molding at all. That is, it is necessary to manufacture the insert part with another apparatus, and the transfer and holding (insert) of the insert part to the mold must be performed by another apparatus or with human power. The original advantage cannot be utilized at all.

The present invention has been made in view of the above-mentioned problems, specifically, can be overlapping at least a portion of the heating of the metal insert parts for Inserts molding and the next cycle, Furthermore, it is an object to provide a inserts molding method capable of overlapping at least a part of the pressing and heating of the metal insert part for insert molding and the next cycle.

The object of the present invention is to provide a stationary platen,
Movable plate,
A rotating mold support mechanism disposed between the fixed platen and the movable platen;
In an injection molding apparatus comprising
A common mold attached to the stationary platen;
Combined by clamping and the common mold have at least two mold parting surface to form a mold cavity, by the rotary die support mechanism rotatably supported by the rotary axis perpendicular to the mold opening and closing direction A rotating mold part that is moved in the mold opening and closing direction ;
Attached to the movable platen, a dummy plate to form a closed space in combination with the rotary mold unit by clamping,
The dummy plate is disposed on a surface facing the mold dividing surface of the rotating mold portion of the dummy plate, and in the sealed space, the dummy plate or the metal insert part held in the rotating mold portion is directly Or a heating means capable of heating from a position separated by a predetermined distance;
The temperature of the metal insert part which is disposed on the surface of the dummy plate facing the mold dividing surface of the rotating mold portion and held in the dummy plate or the rotating mold portion in the sealed space. Temperature measuring means capable of measuring in contact or non-contact;
An insert molding method is performed by attaching an insert molding die composed of:
The common mold, the rotating mold part, and the dummy plate are clamped, and a mold cavity formed between the common mold and the rotating mold part is injected and filled with molten resin, and the rotation is performed. An insert molding step of integrally molding the metal insert part and the molten resin held at a position facing the common mold of the mold part;
In the closed space formed between the dummy plate and the rotating mold part by clamping the common mold, the rotating mold part, and the dummy plate, the dummy plate or the rotating mold An insert part heating step of heating the metal insert part held by a part to a temperature substantially equal to a plasticizing melting temperature of the molten resin by the heating means;
In a state where the sealed space is maintained, the dummy plate and the rotating mold part are opened from the common mold, and then an insert molded product is taken out between the common mold and the rotating mold part. Process,
Have
According to an insert molding method, wherein at least a part of the insert molding step and the insert component heating step is overlapped, and the insert component heating step is completed simultaneously with or after completion of the product removal step . Achieved.

That is, with this insert molding method , a mold cavity for insert molding between the common mold and the rotating mold part is heated between the rotating mold part and the dummy plate during the mold clamping, and the metal insert part for the next cycle is heated. Since the sealed space for performing the above can be formed simultaneously, at least a part of the insert molding and the heating of the metal insert part for the next cycle can be overlapped.

Further , in the insert molding method , the dummy plate and the rotating mold part are clamped so that the metal insert part held by the dummy plate or the rotating mold part is clamped in the rotating mold part. It is configured as a press mold that presses into the mold cavity shape ,
In the insert component heating step, a pressing step of pressing the metal insert component held in the dummy plate or the rotating mold part into a mold cavity shape of the rotating mold part by clamping. An insert molding method may be used.

Further, for the insert molding method, the metal insert part, in a state of being held at a position opposed to the common mold of the rotary mold unit, mold closing said rotary mold unit to the common mold An insert molding method in which metal insert parts for the next molding cycle are supplied and held on the dummy plate or the rotating mold part during or after the mold closing is also possible.

The mold for insert molding according to the present invention includes a stationary platen,
Movable plate,
A rotating mold support mechanism disposed between the fixed platen and the movable platen;
In an injection molding apparatus comprising
A common mold attached to the stationary platen;
Combined by clamping and the common mold have at least two mold parting surface to form a mold cavity, by the rotary die support mechanism rotatably supported by the rotary axis perpendicular to the mold opening and closing direction A rotating mold part that is moved in the mold opening and closing direction ;
Attached to the movable platen, a dummy plate to form a closed space in combination with the rotary mold unit by clamping,
The dummy plate is disposed on a surface facing the mold dividing surface of the rotating mold portion of the dummy plate, and in the sealed space, the dummy plate or the metal insert part held in the rotating mold portion is directly Or a heating means capable of heating from a position separated by a predetermined distance;
The temperature of the metal insert part which is disposed on the surface of the dummy plate facing the mold dividing surface of the rotating mold portion and held in the dummy plate or the rotating mold portion in the sealed space. Temperature measuring means capable of measuring in contact or non-contact;
An insert molding method is performed by attaching an insert molding die composed of:
The common mold, the rotating mold part, and the dummy plate are clamped, and a mold cavity formed between the common mold and the rotating mold part is injected and filled with molten resin, and the rotation is performed. An insert molding step of integrally molding the metal insert part and the molten resin held at a position facing the common mold of the mold part;
In the closed space formed between the dummy plate and the rotating mold part by clamping the common mold, the rotating mold part, and the dummy plate, the dummy plate or the rotating mold An insert part heating step of heating the metal insert part held by a part to a temperature substantially equal to a plasticizing melting temperature of the molten resin by the heating means;
In a state where the sealed space is maintained, the dummy plate and the rotating mold part are opened from the common mold, and then an insert molded product is taken out between the common mold and the rotating mold part. Process,
Have
An insert molding method characterized by overlapping at least a part of the insert molding step and the insert component heating step, and completing the insert component heating step simultaneously with or after completion of the product removal step ; since the, with overlapping at least a part of the heating of the metal insert parts for inserts molding and the next cycle, the heating time of approximately sufficiently heated to the same temperature a metal insert part and plasticizing the melt temperature of the molten resin Can be secured. As a result, it is possible to reduce the influence of the heating time of the metal insert part occupying the molding cycle of the insert molded product while ensuring excellent adhesion between the metal insert part and the resin.

Then, engagement Louis concert molding method according to the present invention, the dummy plate and the rotary mold section, the mold clamping, the dummy plate, or the metal insert part which is held in the rotary mold unit , And configured as a pressing mold for pressing into the mold cavity shape of the rotating mold part,
In the insert part heating step, there is also a pressing step of pressing the metal insert part held in the dummy plate or the rotary mold part into a mold cavity shape of the rotary mold part by clamping. Since it is possible at almost the same time, it is possible to overlap at least part of the press processing of the metal insert part for insert molding and the next molding cycle, and the pressed insert part is held in the rotating mold part as it is and rotated. Since it is moved to a position facing the common mold by the process, the process of pressing the metal insert part with another press device, etc., and the metal insert part is conveyed to the injection molding apparatus, and the mold mold The step of holding (inserting) the mold cavity surface can be omitted.

It is a schematic side view of the injection molding apparatus which concerns on Example 1 of this invention. It is a general | schematic fragmentary sectional view which shows the first half of the shaping | molding process of insert molding which concerns on Example 1 of this invention. It is a general | schematic fragmentary sectional view which shows the second half of the shaping | molding process of insert molding which concerns on Example 1 of this invention. It is a schematic side view of the injection molding apparatus which concerns on Example 2 of this invention. It is a general | schematic fragmentary sectional view which shows the first half of the shaping | molding process of insert molding which concerns on Example 2 of this invention. It is a general | schematic fragmentary sectional view which shows the second half of the shaping | molding process of insert molding which concerns on Example 2 of this invention. It is a schematic side view around the dummy plate of the injection molding apparatus which concerns on Example 3 of this invention. It is a general | schematic fragmentary sectional view which shows a press molding process among the molding processes of the insert molding which concerns on Example 3 of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a schematic side view of an injection molding apparatus for insert molding according to Embodiment 1 of the present invention. FIG. 2 is a schematic partial cross-sectional view showing the first half of the molding process of insert molding according to Embodiment 1 of the present invention, and FIG. 3 is the latter half. 2A is an insert component heat retaining process and an insert part supply process, FIG. 2B is an insert molding process and an insert part heating process in a clamped state, and FIG. 2C is an injection filling completion state of the insert molding process. 3 (a) shows the product removal process, and FIG. 3 (b) shows the rotation process. 2 and 3 are schematic partial cross-sectional views (side views) illustrating the molding process in order for the mold part (side view) of FIG. 1 in order to facilitate understanding of the molding process. Components that are not directly related to the process are not shown.

  First, the basic configuration of the injection molding apparatus 1 according to the present invention will be described with reference to FIG. The injection molding apparatus 1 is in a mold open state immediately before a rotation process described later is completed and an insert component heat retaining process for closing the rotary mold portion 40 to the common mold 19 is started. The injection molding apparatus 1 includes a stationary platen 3 fixed to a bed 2, a movable platen 5 movably provided in a mold opening / closing direction by a mold clamping means (not shown), the fixed platen 3 and the movable platen. 5, a rotating mold support mechanism 4 that supports the rotating mold part 40 that is disposed between and attached to be rotatable around a rotation axis orthogonal to the mold opening / closing direction, and moves in the mold opening / closing direction, and the rotating mold part 40, which has two mold mounting surfaces facing the fixed platen 3 and the movable platen 5, and can be rotated around the rotation axis in the vertical direction perpendicular to the mold opening / closing direction by the rotary mold support mechanism 4. And the first injection unit 17 provided on the fixed platen 3 side.

  A common mold 19 is attached to the fixed platen 3 on the front side (side facing the movable platen 5), and the first injection unit 17 is directed toward the common mold 19 from the back side to the front side. A through hole 3a for advancing and retreating is formed. A tie bar (not shown) protrudes from the four corners of the fixed platen 3 and passes through the movable platen 5.

  A dummy plate 6 is attached to the movable platen 5 on a surface facing the fixed platen 3, guided by a tie bar (not shown), and is provided so as to be able to advance and retreat with respect to the fixed platen 3 by mold clamping means (not shown). The dummy plate 6 protects the mold dividing surface of the opposed rotating mold part 40 during mold clamping, and the heating means 6a and the temperature measuring means 6b on the surface of the rotating mold part 40 facing the mold mounting surface. Is arranged. The dummy plate 6, the heating unit 6a, and the temperature measuring unit 6b will be described after other configurations are described.

  The rotary mold support mechanism 4 is disposed between the fixed platen 3 and the movable platen 5 and is provided on the bed 2 so as to be movable in the mold opening / closing direction. The movement guide (guide) of the rotary mold support mechanism 4 in the mold opening / closing direction may be provided by guide means such as a linear motion guide provided on the bed 2, or the rotary mold of the rotary mold unit 40. The mold attaching part 41 is composed of a rotating part that has a mold attaching surface and rotates, and a frame part that rotatably supports the mold attaching part 41 and does not rotate, and tie bars (not shown) are provided at the four corners of the non-rotating frame part. The guide may be guided by being penetrated, and a known guide means may be appropriately selected. The rotating mold support mechanism 4 supports a rotating mold part 40 supported rotatably around a vertical rotation axis orthogonal to the mold opening / closing direction. The rotating mold support part 4 includes a rotating mold mounting part 41 having a surface, and a first rotating mold 20 and a second rotating mold 21 respectively mounted on the mold mounting surface of the rotating mold mounting part 41. Is detachably attached.

  The rotating mold mounting portion 41, the first rotating mold 20 and the second rotating mold 21 are one mold (rotating mold) having two mold dividing surfaces facing the fixed platen 3 and the movable platen 5. Mold part), and may be detachably attached to the rotating mold support mechanism 4 or the non-rotating frame part of the rotating mold attaching part 41 described above. Further, the rotating mold part 40 may be configured to be rotatably supported around a horizontal rotation axis orthogonal to the mold opening / closing direction.

  The first rotating mold 20 and the second rotating mold 21 have the same mold cavity shape, and the mold cavity surface forms the design surface of the insert molded product 9. Further, the first rotating mold 20 and the second rotating mold 21 are respectively combined with the common mold 19 by clamping to form mold cavities. The common mold 19 and the first rotating mold 20 form a first mold cavity 30, and the common mold 19 and the second rotating mold 21 form a second mold cavity 31 (not shown). In addition, on each mold cavity surface, the insert part is held so as to hold the insert part so as to constitute at least a part of the design surface of the insert molded product or to be included in the insert molded product. Means are arranged. This insert component holding means is configured to be able to hold the insert component at a predetermined position against its weight and the flow of molten resin in the mold cavity at the time of an insert molding process described later. According to the material, weight, size, shape, etc. of the insert part to be held, known mechanical gripping, suction gripping, etc. may be appropriately selected.

  One of at least two mold dividing surfaces of the rotating mold portion 40, in this case, the mold cavity surface of the mold dividing surface of the first rotating mold 20, is inserted with the insert component 9a heated in the previous molding cycle. It is held by an insert component holding means (not shown). The insert part 9a and the insert part 9a 'in the first embodiment are metal insert parts that are manufactured and prepared in advance outside the injection molding apparatus. Although these are the same insert parts, in order to distinguish whether they are heated or the like in the explanation of the molding process, they are shown with different symbols.

  The dummy plate 6 is combined with each of the second rotating mold 21 and the first rotating mold 20 by clamping to form a sealed space. The dummy plate 6 and the second rotating mold 21 form a first sealed space 33, and the dummy plate 6 and the first rotating mold 20 form a second sealed space 34 (not shown). The mold dividing surface of the mold part 40 is protected. And the heating means 6a arrange | positioned at the surface facing the rotation mold part 40 of the dummy plate 6 is the 1st sealing formed between the dummy plate 6 and the rotation mold part 40 by mold clamping (mold closing). In the space 33 and the second sealed space 34, the insert part held on the mold cavity surface of the rotary mold part 40 is heated by an insert part holding means (not shown). In the heating means 6a, the distance and positional relationship between the heating means 6a and the insert parts are optimized from the viewpoint of heating efficiency according to the material, weight, size, shape, etc. of the insert parts to be heated at the time of clamping. It is preferable to arrange | position. Specifically, the heating means 6a can easily control the heating temperature and the heating pattern, and an electric heater or the like provided with a heating section whose shape can be changed according to the shape of the insert component. Depending on the size and size, the die opening and closing direction and the mounting position on the surface orthogonal to the die opening and closing direction can be changed to be placed on the surface of the dummy plate 6 facing the rotating mold part 40, and the insert part. It is only necessary to heat only the surface of the rotating mold portion 40 so that unnecessary portions such as the mold cavity surface of the rotating mold portion 40 are not heated. However, in the case where there are portions where molding defects such as sink marks and weld lines are likely to occur on the mold cavity surface, these portions may be configured and arranged to be heated to an appropriate temperature.

  Further, a temperature measuring means 6 b is disposed on the surface of the dummy plate 6 facing the rotating mold part 40. This temperature measuring means 6b also has a distance and positional relationship between the heating means 6a and the insert part depending on the material, weight, size, shape, etc. of the insert part to be heated at the time of mold clamping (mold closing). It is preferable to arrange the temperature so that it can be measured in contact or non-contact. As a specific arrangement, in FIG. 1, the temperature measuring means 6b is arranged in the heating means 6a, but the arrangement of the temperature measuring means 6b is not limited to this. Further, the heating means 6a and the temperature measuring means 6b are intensively arranged on the dummy plate 6 so that the heating means 6a and the temperature measuring means 6b are replaced with the first rotating mold 20, the second rotating mold 21, and the common mold 19. Therefore, it is not necessary to dispose inside the mold for forming the mold cavity for injecting and filling the molten resin, and it is possible to avoid the complexity of the mold structure due to the arrangement of the heating means and the like on these molds.

  Here, in order to prevent a reduction in heating efficiency and loss of heating energy due to heating of the dummy plate 6 and the rotating mold part 40, in addition to the insert parts to be heated, these electric heater bodies, mounting members, The dummy plate 6 and the rotating mold part 40 are preferably provided with heat insulating and heat retaining means such as a heat insulating material and a heat insulating structure at appropriate portions. Further, the temperature measuring means 6b can be contacted or non-contacted at a high temperature, and the temperature measuring means 6b is arranged so that the heating efficiency of the insert part by the heating means 6a is not lowered and the heating means 6a. In order to protect the temperature measuring means 6b from heating, it is preferable to employ a heat insulating / heat resistant means such as an appropriate heat insulating material or heat insulating structure. If such a heat insulating and heat retaining means is employed in an insert molding die for heating an insert part in a die for forming a die cavity for injection filling with a molten resin as in Patent Document 1, heating efficiency can be improved. Although reduction and loss of heating energy can be prevented, the cooling efficiency of the mold when the mold is cooled to cool and solidify the molten resin in the mold cavity is reduced. On the other hand, in the present invention, since the heating means and the temperature measuring means are not arranged in the mold that forms the mold cavity for injecting and filling the molten resin, such a heat insulating and heat retaining means is provided in these means. Even if it is adopted, it does not decrease the cooling efficiency of the mold, and contributes to shortening of the cooling and solidifying time.

  Further, the insert component supply means 45 for supplying the insert component 9a ′ for the next molding cycle, which has not yet been heated, between the dummy plate 6 attached to the movable platen 5 and the opposing rotary mold portion 40. Is arranged. The insert component supply means 45 is preferably composed of a device having an arm part that can freely move within a predetermined range, such as an articulated robot, and a grip means provided at the tip of the arm part. Then, the other of the at least two mold dividing surfaces of the rotating mold part 40, in this case, the mold cavity surface of the mold dividing surface of the second rotating mold 21 is supplied. As the gripping means, known mechanical gripping, suction gripping, or the like may be appropriately selected according to the material, weight, size, shape, etc. of the insert part to be supplied. Further, it is preferable that the gripping means is attached to the tip of the arm portion via a structure that can be easily attached and detached in order to easily cope with the change of the insert part. Depending on the shape of the mold cavity surface of the rotating mold part 40, the insert part may be supplied not to the mold cavity surface of the rotating mold part 40 but to the opposing dummy plate 6 side. In this case, the insert component holding means (not shown) is also arranged on the dummy plate 6 side, but the arrangement may be either the dummy plate 6 or the heating means 6b. At a predetermined timing after the closing, the holding of the insert part is switched from the dummy plate 6 side to the mold cavity surface side of the rotating mold part 40.

  Next, the molding process of insert molding according to the first embodiment of the present invention will be described with reference to FIGS.

  From the mold open state shown in FIG. 1, as shown in FIG. 2A, the rotary mold support mechanism 4 closes the rotary mold portion 40 to the common mold 19, and the common mold 19 and the insert part 9a are closed. A first mold cavity 30 is formed between the first rotating molds 20 of the held rotating mold part 40 (insert component heat-retaining step). As described above, the insert part 9a has been heated to a predetermined temperature in the previous molding cycle, and the insert part heat retaining process is performed during the period from the insert part supply process to the insert molding process described later. Is stored in the first mold cavity 30 which is generally composed of a mold having a temperature equal to or higher than the outside air temperature, so that the outside air is cut off and the temperature drop is minimized. In addition, the amount of mold opening between the dummy plate 6 and the second rotating mold is further expanded from the mold opening state shown in FIG. 1, thereby facilitating the insert component supplying process described later. Thereafter, the insert component supply means 45 that holds the non-heated insert component 9a ′ for the next molding cycle is inserted into the dummy plate 6 and the rotating mold in the mold open state during or after the insert component heat retaining process. The second insert part 9a ′ is supplied to the mold cavity surface of the second rotary mold 21 of the rotary mold part 40 (insert part supplying step). The supplied insert part 9a ′ is held at a predetermined position on the mold cavity surface of the second rotary mold 21 of the rotary mold part 40 by an insert part holding means (not shown). Retreat from between the dummy plate 6 and the rotating mold part 40.

  Next, as shown in FIG. 2B, the dummy plate 6 is closed to the second rotating mold 21 of the rotating mold portion 40 by a mold clamping means (not shown), and the dummy plate 6 and the insert component 9a ′ are held. A first sealed space 33 is formed between the second rotating molds 21 of the rotated rotating mold part 40. Subsequently, the first mold formed between the common mold 19 and the first rotating mold 20 after the common mold 19, the rotating mold portion 40 and the dummy plate 6 are clamped with a predetermined clamping force. The cavity 30 is injected and filled with molten resin from the first injection unit 17 via the resin flow path disposed in the common mold 19, and the insert component 9a and molten resin heated to a predetermined temperature in the previous molding cycle The insert molded product 9 in which is integrally molded is molded (insert molding process). Further, during the mold clamping, the insert component 9a 'is heated to a predetermined temperature by the heating means 6a in the first sealed space 33, overlapping with the insert molding step (insert component heating step). The arrow indicates the movement of the mold and the injection filling state of the injection unit, and the white arrow indicates that the mold clamping force is applied.

  For this predetermined temperature, the material and volume of the insert part, the position to be inserted into the insert molded product, the type of molten resin, etc., and further the difference in linear expansion coefficient inherent to the material of the insert part and the resin part, or From the difference in temperature change environment, the temperature at which the internal stress of the insert part resulting from it can be reduced may be set as appropriate. Specifically, it is preferable to set the temperature to be approximately the same as the plasticizing melting temperature of the molten tree species to be injected and filled in the insert molding process described later. Since the temperature of the insert part and the resin part when the molten resin is cooled and solidified and taken out of the mold is considered to be substantially the same, the temperature of the insert part in the insert molding process is plasticized and melted by injection filling. If the temperature is substantially the same as the temperature, at least the difference in the temperature change environment (temperature drop) between the insert part and the resin part in the cooling and solidifying step after injection filling can be made substantially zero.

  As described above, the insert component heating step is performed in a sealed space that is shut off from the outside air by mold clamping in a state where the insert component 9a 'and the heating means 6a are optimized from the viewpoint of heating efficiency. Therefore, in an open space, heating efficiency is high compared to a heating method in which a heating unit is placed close to a heating target, heating time can be shortened, and energy consumption can be reduced. In addition, as described above, the heating efficiency can be improved by adopting heat insulation / heat insulation means such as an appropriate heat insulating material or heat insulating structure in an appropriate portion of the electric heater main body, the mounting member, or the dummy plate 6 that is not to be heated. Further improvement can be expected. Similarly to the heating means 6a, the temperature measurement means 6b measures the temperature of the insert part 9a 'in an optimum state. Therefore, the temperature of the insert part 9a' in the insert part heating process is accurately measured and set. The insert part 9a ′ can be reliably heated to the temperature.

  Here, the time required for the insert component heating process to reach a predetermined temperature differs depending on the material, weight, size, shape, and the like of the insert component to be heated. Moreover, in order to minimize the temperature drop of the heated insert component, the insert component heating step is preferably completed simultaneously with the completion of the product removal step described later or after the completion of the product removal step. In other words, if the time required for the insert heating process exceeds the time required for the insert molding process including the cooling and solidifying time of the insert molded product, with the completion of the product removal process as the completion criterion for the insert part heating process, the molding cycle is affected. In order to ensure the heating time as long as possible, the heating of the heating means 6a is started from the stage of the insert component heat insulation process described above, and the insert component 9a ′ is substantially simultaneously with the formation of the first sealed space 33. The heating may be started. Conversely, if the time required for the insert part heating process is less than the time required for the insert molding process, reversely calculate from the completion of the product removal process and start the insert part heating process at an appropriate timing after the insert molding process starts. Just do it.

  Thus, during mold clamping, since at least a part of the insert molding process and the insert part heating process can be overlapped if necessary, the insert can be performed within one mold as in Patent Document 1. With respect to the form in which the part is heated, at least a part of the heating of the insert part and the insert part for the next cycle is overlapped to ensure a heating time for sufficiently heating the insert part to a predetermined temperature. As a result, while ensuring excellent adhesion between the insert part and the resin, the influence of the heating time of the insert part on the molding cycle of the insert molded product can be reduced, and the molding cycle of the insert molded product is shortened. be able to. Further, the energy consumption is not increased by unnecessarily increasing the heating time.

  Here, when the insert part is heated in a set of molds that form a mold cavity as in the insert molding method and insert mold of Patent Document 1, the insert part is heated before injection molding. As described above, there is a problem that the molding cycle of the metal insert molded product becomes long.

  On the other hand, when solving this with the form of patent document 1, it is possible to make the capability of a heating means high. However, in the case of the heating means for energizing the metal insert part described in Patent Document 1, there is a risk that a high voltage (high current) exists in the mold, and the metal insert part is electrically insulated in the mold cavity. There is a problem that the mold structure is complicated by arranging in a state. Similarly, in the case of a heating means in which a heating element is arranged in the mold, it is difficult to arrange the heating element in a state of high heating efficiency due to restrictions on the mold cavity, and the mold itself is also heated. Is done. Therefore, it is necessary to increase the cooling capacity of the mold, which further increases the complexity of the mold structure and increases the cooling time, and also increases the temperature range of the heat cycle in which the mold is repeatedly heated and cooled. .

  Moreover, when the glass resin added PC resin is used as the resin material and the iron-based metal material is used as the insert part as described above, the resin for injection-filling the metal insert part as in the insert molding method of Patent Document 1 Even if the material is heated above the melting point or softening point (in this case, the PC resin glass transition temperature = about 140 ° C.), the PC resin glass transition temperature is about 140 ° C. The difference in temperature change environment (temperature drop) between the insert part and the resin part in the cooling and solidification process cannot be sufficiently solved. As a result of the trial calculation, in the temperature range from about 140 ° C. of the PC resin glass transition temperature to a little higher than that, there is a possibility that the difference in temperature change environment (temperature drop) is increased compared to the case where the insert part is not heated. In the lower limit range of the heating temperature of the metal insert part in the insert molding method of 1, it is difficult to achieve the described sufficient effect. Furthermore, if the insert part is heated to a temperature higher than that, for example, approximately the same as the plasticization melting temperature of the molten tree to be injected and filled in the insert molding process described later, the molding cycle of the metal insert molded part becomes longer. Needless to say.

  In contrast, the present invention does not affect the molding cycle at all even if the insert part heating process is continued immediately after the mold is closed until the insert molding process is completed and the mold is opened. If more heating time is required, the insert component heating process can be continued until the product removal process is completed at the maximum without affecting the molding cycle, as will be described later. Further, the heating means 6a and the temperature measuring means 6b are not arranged on the mold side for injecting and filling the molten resin, and the temperature of the insert part is measured in a contact or non-contact manner in an optimum state from the viewpoint of heating efficiency. However, in order to properly heat the insert parts, it is possible to avoid the complexity of the structure due to the arrangement of the heating means to these molds and to heat the mold itself to form a mold cavity for injecting and filling molten resin. Is suppressed, and an increase in heating time and energy consumption is also prevented. Similarly, extension of the cooling and solidification time for cooling and solidifying the molten resin in the mold cavity is also prevented, and the temperature range of the heat cycle in which the mold is repeatedly heated and cooled is not expanded.

  Returning to the description of the molding process. As shown in FIG. 2 (c), after the injection filling of the molten resin into the first mold cavity 30 is completed, the common mold 19 is used with a predetermined mold clamping force until the time for cooling and solidifying the molten resin elapses. Clamping of the rotating mold part 40 and the dummy plate 6 is continued (insert molding process). The insert part 9a held in the first rotary mold 20 of the rotary mold part 40 is to be integrally formed with the molten resin in a state where the temperature drop is suppressed to a minimum by the insert part heat insulation process and is sufficiently heated. In the cooling and solidifying step after injection filling, the difference in temperature change environment between the insert part and the resin part can be reduced, and the occurrence of internal stress of the insert molded product due to this can be minimized. In this way, in the first mold cavity 30, the insert molded product 9 including the insert part 9a and the resin portion 9b is molded.

  After completion of the insert molding process, as shown in FIG. 3A, the dummy plate 6 is maintained in a state in which the first sealing space 33 is maintained by interlocking the mold clamping means (not shown) and the rotary mold support mechanism 4. After the mold 40 is opened from the common mold 19, the insert molded product 9 is taken out from between the common mold 19 and the rotary mold part 40 by a product take-out means (not shown) and put out of the injection molding apparatus 1. Transport (product removal process). Even during the product take-out process, it is possible to continue heating the insert part 9a ′ in the maintained first sealed space 33 by the heating means 6a (insert part heating process), and the product take-out process is completed. At the same time or after the product removal process is completed, the insert part heating process is completed. Here, in order to facilitate product removal within the limited mold opening / closing stroke of the injection molding apparatus, a larger amount of mold opening is required. For this reason, the dummy plate 6 and the rotating mold part 40 are shared. It is reasonable to open the mold integrally from the mold 19, and this can be used to maintain a sealed space during the product removal process and continue the insert component heating process inside the molding cycle. Has little effect.

  In order to open the dummy plate 6 and the rotating mold part 40 from the common mold 19 with the first sealed space 33 maintained, the rotating mold part 40 and the dummy plate 6 or the movable platen are opened. 5 and a mechanical means (not shown) that can be integrated arbitrarily, and the integrated dummy plate 6 and rotating mold part 40 may be opened by a clamping means (not shown). In addition, since the insert mold product 9 has the rotating mold portion 40 side as a design surface, in the product removal process, the insert mold product 9 is held on the common mold 19 side which is a non-design surface and is opened, and the common mold 19 side is opened. However, if necessary, it may be held on the rotating mold part 40 side to open the mold, and may be extruded from the rotating mold part 40 side by a product pushing means (not shown). .

  After the product take-out process and the insert component heating process are completed, as shown in FIG. 3B, the dummy plate 6 is rotated to the mold opening position of the dummy plate 6 where the rotating mold part 40 can be rotated by a mold clamping means (not shown). The plate 6 is opened from the second rotating mold 21 of the rotating mold part 40 that holds the heated insert component 9a ′. After that, the rotating mold support mechanism 4 rotates the rotating mold part 40, and the insert part 9 a ′ held by the second rotating mold 21 of the rotating mold part 40 is moved to a position facing the common mold 19. (Rotation process). By the time the rotation process is completed, it is preferable that the insert component supply means 45 holds the insert component 9a for the next molding cycle and waits in the vicinity between the dummy plate 6 and the rotating mold part 40. In addition, in order to minimize the temperature drop of the insert part 9a ′ heated in the insert part heating process, the rotation process, insert part warming process and insert part supply process performed after the product removal process and before the insert molding process are as follows: Needless to say, it is preferably performed in as short a time as possible.

  The mold open state shown in FIG. 3B is the first rotary mold 20 and the second rotation of the rotary mold part 40 facing the common mold 19 and the dummy plate 6 from the mold open state shown in FIG. 2A and 2B, when the common mold 19, the rotating mold part 40, and the dummy plate 6 are clamped, the dummy plate 6 and In the second sealed space 34 newly formed between the first rotating molds 20 of the rotating mold part 40, the insert component heating process is newly formed between the common mold 19 and the second rotating mold 21. An insert molding process is performed in the two mold cavities 31. That is, the molding process of FIG. 2A to FIG. 3B becomes one molding cycle of the molding process of the insert molding according to Example 1 of the present invention. By repeating this molding cycle, the insert component 9a (insert It is possible to continuously form the insert molded product 9 composed of the component 9a ′) and the resin portion 9b and having excellent adhesion between the insert component and the resin every time the mold is opened.

  In the first embodiment, the mold cavity surfaces of the first rotating mold 20 and the second rotating mold 21 form the design surface of the insert molded product 9, but these mold cavity surfaces are the insert molded product 9. The non-design surface may be configured such that the mold cavity surface of the common mold 19 forms a design surface. In the case of this form, since the insert part holding means is disposed on the mold cavity surface on the non-design surface side, it is difficult to insert-mold the insert part so as to constitute at least a part of the design surface. However, it is possible to configure the insert part to constitute at least a part of the non-design surface of the insert molded product, or to include the insert part in the insert molded product. Insert molding to be configured, and molding of molded inserts that can be tapped for screws on non-design surfaces and can be directly welded to other metal parts, and insert molded products that contain metal insert parts as strength members It is suitable when doing.

  In the first embodiment, the first rotating mold 20 and the second rotating mold 21 have the same mold cavity shape and use the same insert part, but the present invention is not limited to this. For example, in an industrial product in which an insert molded product is used, when a specification change or the like is performed and the design or shape of the insert part or the resin part of the insert molded product is slightly changed, the first rotating mold 20 and the second In the insert part supply process, insert parts having specifications corresponding to the respective mold cavity shapes are supplied in the insert part supply process so that the two-turn mold 21 has a slightly different mold cavity shape before and after the specification change. Furthermore, insert molded products before and after the specification change can be alternately and continuously molded. Furthermore, as in Example 2, the first rotating mold 20 and the second rotating mold 21 are made into completely different mold cavity shapes, and the mold opening is performed in two molding steps, but there are two types of resin portions. An insert-molded product composed of a resin material can be molded.

  Next, Embodiment 2 of the present invention will be described with reference to FIGS. FIG. 4 is a schematic side view of an injection molding apparatus for insert molding according to Embodiment 2 of the present invention. FIG. 5 is a schematic partial cross-sectional view showing the first half of the molding process of insert molding according to Embodiment 2 of the present invention, and FIG. 6 is the second half. 5A is an insert part supply process, FIG. 5B is a primary molding process and an insert part heating process in a clamped state, FIG. 5C is a primary mold opening process, and FIG. 6A is a primary rotation. Step, FIG. 6B shows the insert molding step in the clamped state, FIG. 6C shows the secondary mold opening step and the product removal step, and FIG. 6D shows the secondary rotation step. 5 and 6 are schematic partial cross-sectional views illustrating the molding process in order with respect to the mold part (side view) of FIG. 4 in order to facilitate understanding of the molding process. The components that are not directly related to the molding process are not shown.

  The difference in the basic configuration of the second embodiment from the first embodiment is that the first rotating mold 20 ′ and the second rotating mold 21 ′ of the rotating mold portion 40 ′ have different mold cavity shapes, The second injection unit 18 is used in addition to the first injection unit 17. Due to these differences, although the mold opening is a two-time molding step, the resin part can be continuously molded from the single-layer molded body of Example 1 to an insert molded product composed of two types of resins. . Since the other basic configurations of the injection molding apparatus are basically the same as those of the first embodiment, the same reference numerals are given to the same components in FIGS. 4 to 6 and only the differences from the first embodiment will be described.

  First, the difference in the basic configuration of the second embodiment from the first embodiment will be described with reference to FIG. The injection molding apparatus 1 completes the product take-out process, which will be described later, and rotates the rotating mold part 40 ′ for the next molding cycle, so that the first rotating mold 20 ′ of the rotating mold part 40 ′ is shared. In this state, the secondary rotation process of moving the second rotary mold 21 ′ to the position facing the dummy plate 6 at the position facing the mold 19 ′ is completed. The injection molding apparatus 1 has a second injection unit 18 disposed so as to be connectable to a common mold 19 ′ separately from the first injection unit 17 provided on the fixed platen 3 side. Resin flow paths arranged independently from the first injection unit 17 and the second injection unit 18 to the common mold 19 ′ are formed in the mold cavity formed between the mold 19 ′ and the rotating mold part 40 ′. The molten resin can be injected and filled. These resin flow paths may be configured to share at least a part and form a necessary resin flow path by switching a resin opening / closing switching valve or the like. Further, the second injection unit 18 is shown in FIG. 4 so as to be connected to the upper surface of the common mold 19 ′. This is a schematic side view of FIG. 4, and the second injection unit 18 is common. It is schematically shown that the second injection unit 18 is connected to the mold 19 ′. Actually, the second injection unit 18 is arranged side by side with the first injection unit 17 or the side of the common injection mold 19 ′. You may arrange | position so that connection to a back surface is possible.

  The second injection unit 18 is preferably connected to a common mold 19 ′ that does not move, but the present invention is not limited to this, and the second injection unit 18 may be connected to the rotating mold mounting portion 41 or the second rotating mold 21 ′. good. Further, the second injection unit 18 is configured such that the resin having the larger injection filling amount of the laminated molded product to be molded is injected and filled by the first injection unit 17 and the resin having the smaller amount is injected and filled by the second injection unit 18. Thus, the arrangement of the second injection unit 18 as described above can be selected according to the installation status of the injection molding apparatus. Further, even when the insert molding method according to the present invention is performed by adding a rotary mold support mechanism or the like to a general-purpose injection molding apparatus, the second injection unit 18 is a commercially available product with a relatively small injection filling amount. An additional small injection unit or the like can be employed.

  As in the first embodiment, the rotary mold support mechanism 4 is rotatably supported around a vertical rotation axis orthogonal to the mold opening / closing direction. Unlike the first embodiment, the first rotating mold 20 ′ and the second rotating mold 21 ′ have different mold cavity shapes. The mold cavity surface of the second rotating mold 21 ′ forms the design surface of the insert molded product 9 ′. Further, the second rotating mold 21 ′ is combined with the common mold 19 ′ by clamping to form a second mold cavity 31 ′. In the second mold cavity 31 ′, an insert molding process described later is performed. Done. Therefore, an insert component holding means (not shown) that holds the insert component in a predetermined position is disposed only on the mold cavity surface of the second rotating mold 21 '. On the other hand, the first rotating mold 20 ′ is combined with the common mold 19 ′ by clamping to form a first mold cavity 30 ′. In the first mold cavity 30 ′, a primary molding process described later is performed. Done.

  Further, the insert part 9a ″ in the second embodiment has the same shape as the mold cavity surface of the second rotating mold 21 ′ of the rotating mold part 40 ′ by pressing the metal plate in advance outside the injection molding apparatus. The second rotation of the rotating mold part 40 ′ is performed by an insert part holding means (not shown) so as to constitute at least part of the design surface of the insert molded product 9 ′. It is held at a predetermined position on the mold cavity surface of the mold 21 ′. When the insert part 9a ″ is used as a reinforcing member for the insert molded product 9 ′, it is included in the insert molded product 9 ′. You may hold | maintain a position.

  The dummy plate 6 is combined with the second rotating mold 21 ′ of the rotating mold part 40 ′ by clamping to form a sealed space 33 ′, and an insert component heating process described later is performed in the sealed space 33 ′. . On the other hand, when the dummy plate 6 is combined with the first rotating mold 20 ′ of the rotating mold part 40 ′, it forms a sealed space, but the first rotating mold 20 ′ does not hold an insert part, so it is formed. In the same sealed space, the insert component heating step is not performed.

  Further, an insert component supply means for supplying an insert component 9a ″ for the next molding cycle, which has not yet been heated, between the dummy plate 6 attached to the movable platen 5 and the opposing rotating mold portion 40 ′. 45 is the same as in Example 1. Here, the heating means 6a and the temperature measuring means 6b shown in Fig. 4 are slightly different from Example 1 in their arrangement and shape. The basic functions are the same as in Example 1. These will be described in the molding process of insert molding described later.

  Next, a molding process of insert molding according to Example 2 of the present invention will be described with reference to FIGS.

  From the mold open state shown in FIG. 4, as shown in FIG. 5A, the rotary mold support mechanism 4 closes the rotary mold portion 40 ′ to the common mold 19 ′, and the common mold 19 ′ and the rotation A first mold cavity 30 ′ is formed between the first rotating molds 20 ′ of the mold part 40 ′. Next, during the mold closing or after the mold closing, the insert component supplying means 45 that holds the unheated insert component 9a ″ enters between the dummy plate 6 in the mold open state and the rotating mold portion 40 ′. Then, the insert part 9a ″ is supplied to the mold cavity surface of the second rotary mold 21 ′ of the rotary mold part 40 ′ (insert part supply step). The supplied insert part 9a ″ is held at a predetermined position on the mold cavity surface of the second rotary mold 21 ′ of the rotary mold part 40 ′ by an insert part holding means (not shown). Is retracted from between the dummy plate 6 and the rotating mold part 40 '. Thus, when the shape of the insert part is a sheet, the position is maintained from a plurality of small holes provided in the mold cavity surface. In many cases, suction-type gripping is performed by sucking the air in the mold cavity and bringing it into a negative pressure state.This suction-type gripping does not require a movable mechanical gripping structure, and does not require a plurality of small holes. The insert part can be switched between gripping and opening by sucking and discharging the air, so that the insert part is not only used as a means for gripping the insert part in the mold cavity. It is also suitable as a gripping means for the feeding means 45. In the mold open state shown in Fig. 4, the insert part supply means 45 that grips the insert part 9a "is replaced with the dummy plate 6 and the rotating mold part in the mold open state. If it is possible to enter between 40 ', the insert component supplying step may be performed in the mold open state shown in FIG. Further, in order to optimize the distance and the positional relationship between the heating means 6a and the insert part 9a ″ from the viewpoint of the heating efficiency by the mounting member described above, the second rotating mold of the rotating mold portion 40 ′ is used. If the position is an obstacle to the insert part supply process, the dummy plate 6 is kept waiting during the insert supply process, and after the insert part supply process is completed, the heating means 6a may be moved to the second rotating mold 31 'side, and the temperature measuring means 6b is disposed together with the heating means 6a on the mold dividing surface of the rotating mold part 40'. Although the temperature measurement means 6b is arrange | positioned at two places, it is not limited to this, The form arrange | positioned at the heating means 6a like Example 1 may be sufficient.

  Next, as shown in FIG. 5 (b), the dummy plate 6 is closed to the second rotating mold 21 ′ of the rotating mold portion 40 ′ by a mold clamping means (not shown), and the dummy plate 6 and the insert part 9a ″. The closed space 33 ′ is formed between the second rotating molds 21 ′ of the rotating mold part 40 ′ holding the same, and then the common mold 19 ′, the rotating mold part 40 ′, and the like with a predetermined clamping force. After the dummy plate 6 is clamped, the first mold cavity 30 ′ formed between the common mold 19 and the first rotating mold 20 ′ is passed through a resin flow path disposed in the common mold 19 ′. Then, the first molten resin is injected and filled from the first injection unit 17 to form a primary molded body 9b ′ constituting at least a part of the non-designed surface of the insert molded product 9 ′ (primary molding step). During mold clamping, it is overlapped with the primary molding process, and the sealed space 3 In ', you are possible to perform the insert part heating step of heating to a predetermined temperature by the heating means 6a the insert part 9a ". The arrow indicates the movement of the mold and the injection filling state of the injection unit, and the white arrow indicates that the mold clamping force is applied.

  In the first mold cavity 30 ′, after the completion of the primary molding step for forming the primary molded body 9b ′, the primary molded body 9b ′ is held by the common mold 19 ′ as shown in FIG. 5C. Then, the dummy plate 6 and the rotating mold part 40 ′ are opened from the common mold 19 ′ by the mold clamping means and the rotating mold support mechanism 4 (not shown) (primary mold opening process). In the second embodiment, unlike the first embodiment, this mold opening state (primary mold opening process) is in the middle of the molding process, and the product take-out process and the insert part supply process are not performed. The mold opening amount of the mold part 40 ′ from the common mold 19 ′ does not need to be the same mold opening amount as the secondary mold opening process described later. In the primary rotation process described later, In order to prevent the temperature of the insert part 9a ″ from being lowered, it is preferable to set the minimum amount of mold opening that can be rotated. In addition, the dummy plate 6 and the rotating mold part 40 ′ are separated from the common mold 19 ′. Although the mold opening operation may be performed at the same time, in order to minimize the temperature drop of the insert part 9a ″, the dummy plate 6 and the rotating metal plate are maintained with the sealed space 33 ′ maintained as in the first embodiment. Mold part 40 ' After the mold is opened from the common mold 19 ′, the dummy plate 6 is rotated by holding the heated insert part 9a ″ to the minimum mold opening position of the dummy plate 6 where the rotating mold part 40 ′ can rotate. The mold is preferably opened from the second rotating mold 21 ′ of the mold part 40 ″.

  After completion of the primary mold opening process, as shown in FIG. 6 (a), the rotating mold part 40 'is rotated by the rotating mold support mechanism 4 to hold the heated insert part 9a ". The 40 ′ second rotating mold 21 ′ is moved to a position facing the common mold 19 ′ (primary rotating step).

  After the completion of the primary rotation process, as shown in FIG. 6B, the dummy plate 6 and the rotating mold part 40 ′ are closed to the common mold 19 ′ by a mold clamping means and a rotating mold support mechanism 4 (not shown). The second mold cavity 31 ′ is formed between the common mold 19 ′ holding the primary molded body 9b ′ and the first rotating mold 20 ′ of the rotating mold portion 40 ′ holding the insert part 9a ″. Subsequently, after the common mold 19 ′, the rotating mold portion 40 ′ and the dummy plate 6 are clamped with a predetermined mold clamping force, the common mold 19 ′ is disposed in the second mold cavity 31 ′. The second molten resin is injected and filled from the second injection unit 18 through the formed resin flow path, and the insert part 9a ″ heated to a predetermined temperature and the primary molded body 9b ′ held in the common mold 19 ′. And the second molten resin (secondary molded body 9c) are integrally molded. And thereby forming the insert molded article 9 '(insert molding process). On the other hand, a sealed space is also formed between the dummy plate 6 and the first rotating mold 20 ′ of the rotating mold part 40 ′, but the first rotating mold 20 ′ is formed so as not to hold an insert part. The insert component heating process is not performed in the sealed space. Further, the heating means 6a is moved to the dummy plate 6 side before and after the primary mold opening process, and the heating output is reduced or stopped in order to avoid wasting heating energy. Therefore, no mold clamping force is applied to the heating means 6a, and the first rotating mold 20 'is not heated. However, in the primary molding step, when the primary molded body 9b ′ has a portion that is prone to molding defects such as a weld line, the heating means 6a is operated during the insert molding step, and the first rotating mold 20 ′. The corresponding portion of the mold cavity surface may be appropriately heated.

  After completion of the injection filling of the second molten resin into the second mold cavity 31 ′, the common mold 19 ′ and the rotating mold portion 40 ′ are used with a predetermined clamping force until the cooling and solidifying time of the second molten resin elapses. And the clamping of the dummy plate is continued (insert molding process). The insert part 9a ″ held in the second rotary mold 21 ′ of the rotary mold part 40 ′ has its temperature lowered by performing the primary mold opening process and the primary rotation process in the shortest time after the insert part heating process. In the insert molding process, the insert part 9a ″ is integrally formed with the second molten resin in a sufficiently heated state. Therefore, in the cooling and solidifying process after injection filling, the insert part and the resin part The difference under the temperature change environment can be reduced, and the occurrence of internal stress of the insert molded product due to this can be minimized. In this way, in the second mold cavity 31 ′, the insert molded product 9 ′ composed of the insert part 9a ″, the primary molded body 9b ′ (first molten resin), and the secondary molded body 9c (second molten resin) is obtained. Molded.

  After completion of the insert molding process, as shown in FIG. 6C, the dummy plate 6 and the rotating mold part 40 ′ are opened from the common mold 19 ′ by a mold clamping means and the rotating mold support mechanism 4 (not shown). Then, the insert molded product 9 ′ is taken out from between the common die 19 ′ and the rotating die portion 40 ′ by a product take-out means (not shown) and conveyed outside the injection molding apparatus 1 (product take-out step). Here, since the insert molded product 9 ′ has a rotating mold portion 40 ′ side as a design surface, in the product take-out process, the insert mold product 9 ′ is held on the common mold 19 ′ side which is a non-design surface and is opened and shared. Although it is preferable to extrude from the mold 19 'side by a product pushing means (not shown), if necessary, it is held on the rotating mold part 40' side and the mold is opened, and a product pushing not shown from the rotating mold part 40 'side. It may be extruded by means. Further, in order to facilitate the product removal process, as in the product removal process of the first embodiment, the dummy plate 6 and the rotating mold part 40 ′ are integrated and opened, and the common mold 19 ′ and the rotating mold are opened. A larger amount of mold opening between the portions 40 ′ may be secured.

  After the product take-out process is completed, as shown in FIG. 6D, the rotary mold part 40 ′ is rotated by the rotary mold support mechanism 4, and the first rotary mold 20 ′ of the rotary mold part 40 ′ is moved. The second rotating mold 21 'is moved to a position facing the dummy plate 6 at a position facing the common mold 19' (secondary rotation process). By the end of this secondary rotation process, the insert component supply means 45 can hold the insert component 9a "for the next molding cycle and wait in the vicinity between the dummy plate 6 and the rotating mold part 40 '. preferable.

  The mold opening state shown in FIG. 6 (d) is the same as the mold opening state shown in FIG. 4, and the molding steps of FIGS. 5 (a) to 6 (d) are related to Example 2 of the present invention. This is one molding cycle of the molding process of insert molding. As described above, by repeating the molding process of FIGS. 5A to 6D, the insert component 9a ″, the primary molded body 9b ′, and the secondary molded body 9c are formed. The insert-molded product 9 ′ in which the adhesion is ensured can be continuously molded every two molds.

  In Example 2, the first molten resin that becomes the primary molded body 9b ′ and the second molten resin that becomes the secondary molded body 9c are particularly combined as long as they are thermoplastic resins excellent in mutual adhesion. There is no restriction, and by combining thermoplastic resins having different functions as appropriate, another function can be imparted to the case of an insert molded product in which the resin portion is a single-layer molded body. Specifically, the resin on the non-design surface side is made of a resin that is more elastic than the resin on the design surface side, and protrudes in a predetermined shape to give a sealing function or vibration absorption function, or a non-design surface Recycled resin can be used on the side to reduce costs and meet environmental protection requirements. In the second embodiment, the mold cavity surface of the second rotary mold 21 ′ forms the design surface of the insert multilayer molded product 9 ′. The design surface may be configured such that the mold cavity surface of the common mold 19 ′ forms the design surface.

  Next, Embodiment 3 of the present invention will be described with reference to FIGS. FIG. 7 is a schematic side view around the dummy plate of the injection molding apparatus according to Embodiment 3 of the present invention. FIG. 8 is a schematic partial cross-sectional view showing the press molding process in the molding process of insert molding according to Example 3 of the present invention. In addition, like Example 1, FIG. 8 is a schematic partial cross-sectional view (side view) illustrating the molding process in order with respect to the mold part (side view) of FIG. 7 in order to facilitate understanding of the molding process. The constituent requirements not directly related to the molding process are not shown.

  In the third embodiment, the metal insert part manufactured and prepared in advance outside the injection molding apparatus 1 in the first embodiment is pressed into the metal plate of the rotary mold portion 40 as in the second embodiment. The metal insert part 9a ″ processed into the same shape as the mold cavity surface of the first rotary mold 20 and the second rotary mold 21 is used, and this metal insert part 9a ″ is previously used as the injection molding apparatus 1. Rather than processing / preparing with a separate press device, the inserted metal plate is inserted into the injection molding device 1 by pressing using the clamping force during the molding cycle of the insert molded product 9 ″. The molded product 9 ″ is processed, and the insert molding process is performed without removing the processed insert part 9a ″ from the mold. Differences on configuration, the insert part 9a ", the first rotating mold 20 and the second rotary die 21, a dummy plate 6 'and the heating means 6a'. The other basic configuration of the injection molding apparatus is basically the same as that of the first embodiment (FIG. 1), and the molding process after the insert part 9a ″ is processed by press working is also the first embodiment (FIG. 2 to FIG. 2). Since this is basically the same as 3), the same constituent elements in FIGS. 7 and 8 are denoted by the same reference numerals, and only differences from the first embodiment will be described.

  First, the difference in the basic configuration of the third embodiment from the first embodiment will be described with reference to FIG. As in FIG. 1 of the first embodiment, the injection molding apparatus 1 is in the mold open state immediately before the rotation process is completed and the insert component heat retention process for closing the rotary mold portion 40 to the common mold 19 is started. is there. The common mold 19, the fixed platen 3, the first injection unit 17 and the like that are not different are not shown.

  As in the first embodiment, the rotating mold support mechanism 4 is supported by the rotating mold support mechanism 4 so as to be rotatable about a vertical rotation axis orthogonal to the mold opening / closing direction. The first rotary mold 20 and the second rotary mold 21 are configured. The first rotating mold 20 and the second rotating mold 21 have the same mold cavity shape, and the mold cavity surface forms the design surface of the insert molded product 9 ″ as in the first embodiment. However, since the metal plate 9d before being processed into the insert part is supplied instead of the insert part, the insert part holding means (not shown) also applies the metal plate 9d to the mold dividing surface of the rotating mold part 40. Further, the first rotating mold 20 and the second rotating mold 21 are combined with a dummy plate 6 ′ configured as a press working mold and supplied by press working. In order to process the metal plate into the mold cavity shape of these rotary molds, these first rotary mold and second rotary mold 21 are not only used as injection molds for resin materials, such as material characteristics, press Needless to say, it is necessary to consider industrial molds, and such mold steels that combine the properties of stamping mold steels and injection mold steels are special but commercially available. For example, general-purpose cold die steel “DC53” manufactured by Daido Steel Co., Ltd. can be used.

  Moreover, in Example 3, although the mold cavity shape of the 1st rotation mold 20 and the 2nd rotation mold 21 was made into the concave mold, and the convex side of the insert molded product formed the design surface, the 1st rotation mold 20 and The mold cavity shape of the second rotating mold 21 may be a convex mold, and the concave side of the insert molded product may form a design surface. Further, as described above, the metal plate 9d is held on the dummy plate 6 side, and the pressed insert parts are held from the dummy plate 6 side at a predetermined timing after the press working step described later. It may be switched to the mold cavity surface side of the mold part 40.

  The dummy plate 6 ′ is combined with the second rotating mold 21 and the first rotating mold 20 of the rotating mold part 40 by clamping to form a first sealed space 33 and a second sealed space 34. The difference from the first embodiment is that the dummy plate 6 ′ is configured as a press working die combined with the rotating die part 40. After holding the metal plate 9d supplied by the insert component supply means 45 between the dummy plate 6 'and the rotary mold part 40 on the mold dividing surface of the rotary mold part 40, the mold by a mold clamping means (not shown) is used. A press for pressing into the mold cavity shape of the second rotating mold 21 (first rotating mold 20) of the rotating mold part 40 in the first sealed space 33 (second sealed space 34) by closing and clamping. The processing process is performed. Further, along with the configuration of the dummy plate 6 ′ as a pressing mold, the surface of the dummy plate 6 ′ facing the rotating mold portion 40, that is, the inside of the mold cavity surface 6c as the pressing mold. The difference from the first embodiment is that the heating means 6a ′ and the temperature measuring means 6b are arranged in the first embodiment.

  The heating means 6a 'is continuously arranged in a planar shape inside the mold cavity surface 6c of the dummy plate 6'. If the necessary heating capacity can be ensured, the plurality of heating means may be arranged within a necessary range with a predetermined distance therebetween. In any case, as described above, the heating energy of the heating means 6a ′ disposed inside the mold cavity surface 6c of the dummy plate 6 ′ is higher than that of the metal plate 9d processed into the insert part. In order not to be taken away by the large dummy plate 6 ′, it is preferable that an appropriate heat insulating / heat retaining means or the like is employed. Since the heating means 6a is not arranged in a mold that forms a mold cavity for injection filling with molten resin, the cooling efficiency of the mold that forms the mold cavity even if such a heat insulating and heat retaining means is adopted. As described above, it is not lowered. Similarly to the first and second embodiments, the temperature measuring unit 6b protects the temperature measuring unit 6b from being heated by the heating unit 6a ′ so as not to reduce the heating efficiency of the insert part by the heating unit 6a ′. It is arranged inside the mold cavity surface 6c of the dummy plate 6 ′ so that it can be made. In FIG. 7, the temperature measuring means 6b has a rotating mold part 40 side opened for temperature measurement, but the first sealed space 33 and the second sealed space formed between the dummy plate 6 ′ and the rotating mold part 40. Since the molten resin is not injected and filled into the space 34, it does not matter.

  The insert component supply means 45 for supplying the metal plate 9d is disposed between the dummy plate 6 ′ attached to the movable platen 5 and the rotating mold part 40 facing the same as in the first embodiment. . Since the supply object is a metal plate, the gripping means is preferably suction-type gripping.

  Next, a press molding process will be described among the molding processes of insert molding according to the third embodiment of the present invention with reference to FIG.

  From the mold open state shown in FIG. 7, as shown in FIG. 8A, the rotary mold support mechanism 4 closes the rotary mold portion 40 to the common mold 19, and the common mold 19 and the insert part 9a ″. The first mold cavity 30 is formed between the first rotary molds 20 of the rotary mold part 40 holding the insert molds (insert component heat retaining step). The insert component 9a "is heated to a predetermined temperature in the previous molding cycle. ing. Next, the insert component supply means 45 that holds the metal plate 9d to be pressed into the insert component 9a ″ for the next molding cycle is inserted into the mold-opened dummy plate during or after the insert component heat retaining process. 6 'and the rotating mold part 40 are inserted, and the metal plate 9d is supplied to the mold cavity surface of the second rotating mold 21 of the rotating mold part 40 (insert component supplying step). Is held in position by the insert part holding means (not shown) on the mold dividing surface of the second rotary mold 21 of the rotary mold part 40, and the insert part supply means 45 is provided between the dummy plate 6 ′ and the rotary mold part 40. Evacuate from.

  Next, as shown in FIG. 8B, the dummy plate 6 ′ is closed on the second rotating mold 21 of the rotating mold part 40 by a mold clamping unit (not shown). This mold closing operation is the first stage of the press working process, and the mold cavity surface 6c of the dummy plate 6 ′ is held on the mold cavity surface of the second rotating mold 21 of the rotating mold portion 40. Pressing against the plate 9d, the metal plate 9d press working is started. The mold closing speed of the dummy plate 6 ′ at the start of the pressing process is very important in the pressing process of the metal plate 9d. Therefore, it is optimal according to the material of the metal plate 9d, the plate thickness, the shape to be pressed, etc. The mold closing speed is selected. Further, in a general injection molding apparatus, the mold closing speed and the mold closing force during the mold closing operation are rarely controlled in detail, but the metal plate 9d is pressed into a desired shape in the subsequent mold clamping operation. Thus, not only the optimum mold closing speed is selected, but also according to the progress of the press working of the metal plate 9d by the mold closing operation of the dummy plate 6 ′ (the progress of plastic deformation of the metal plate 9d). It is preferable that the closing speed and the mold closing force are appropriately controlled.

  Next, as shown in FIG. 8C, after the dummy plate 6 'reaches the mold closing position, the common mold 19, the rotating mold part 40, and the dummy plate 6' are clamped. The metal plate 9d is pressed into an insert part 9a ″ having a desired shape in the first sealed space 33 formed between the dummy plate 6 ′ and the second rotating mold 21 of the rotating mold part 40. The unnecessary portion of the metal plate 9d is preferably cut off by shearing at an appropriate timing of the mold clamping operation, and at the same time by the heating means 6a ′ disposed inside the mold cavity surface 6c of the dummy plate 6 ′. Then, heating of the pressed insert part 9a "is started (insert part heating step). The heating means 6a ′ is in the mold open state shown in FIG. 8 (a) or the dummy plate 6 shown in FIG. 8 (b) so that the heating of the insert part 9a ″ can be started immediately after the completion of the mold closing of the dummy plate 6 ′. The temperature may be raised from the start of the mold closing operation.

  This clamping operation is the second stage of the press working process, and the necessary clamping force is required to prevent the insert part 9a ″ that has been pressed into a desired shape from being deformed by the spring back after the pressing. The mold clamping force and the timing for applying the mold clamping force should be selected optimally according to the material of the metal plate 9d, the plate thickness, the shape to be pressed, and the like. At the same time, the mold clamping force and the duration of the mold clamping force are the first mold cavity between the fixed mold 19 and the first rotating mold 19 of the rotating mold part 40 after the mold clamping force is applied. In the insert molding process performed in the above, a range that resists the mold opening force caused by the pressure of the injected molten resin and does not affect the cooling and solidification process of the insert molded product 9 ″ that is cooled and solidified in the first mold cavity (for example, In order to ensure the dimensional stability of the insert molded product 9 ″, it is preferable to control in a multistage manner, such as ensuring a necessary change in clamping force in accordance with the progress of cooling and solidification. Many mold clamping means have a multi-stage control function of the mold clamping force, and if this multi-stage control function of the mold clamping force is utilized, the mold clamping force control in the second stage of the press working process is relatively easy. As for the multistage control function of the mold clamping force, the toggle type mold clamping device is generally superior, and among them, the electric toggle type mold clamping device is capable of more advanced multistage control of the mold clamping force.

  Here, in order to accurately press the metal plate 9d, it is preferable that the metal plate 9d is in a hot state in which the metal plate 9d is sufficiently heated and softened until the press workability is good. It is practically difficult to bring the metal plate 9d into such a state from the supply of the metal plate 9d to the closing of the mold in consideration of the cost effectiveness of the forming cycle and the heating means 6a ′. However, if a sufficiently preheated metal plate 9d is supplied, or if the metal plate 9d is of a specification that can be accurately pressed only by a mold clamping force even in a cold state, the first press processing step by mold closing is performed. Problems at the stage can be suppressed. In addition, after the mold clamping force is applied and the process proceeds to the second stage of the press working process, a sealed space is formed and the mold cavity surface 6c with the heating means 6a ′ and the metal plate 9d (insert parts) are inserted. 9a ″) can substantially ensure the heating efficiency of the heating means 6a ′, so that the temperature of the preheated metal plate 9d can be prevented from decreasing, or the cold metal plate 9d can reach a predetermined temperature. If necessary, if this predetermined temperature is set high, the press workability of the metal plate 9d can be improved along with the multistage control of the mold clamping force in the second stage of the press work process, Contributes to prevention of deformation due to springback after pressing.

  Prioritizing the explanation of the mold closing operation and the mold clamping operation of the dummy plate 6 ′ constituting the first stage and the second stage of the press working process, after the mold clamping force is applied, as in the first embodiment, The first injection unit 17 is inserted into the first mold cavity 30 formed between the common mold 19 and the second rotating mold 21 of the rotating mold unit 40 via the resin flow path disposed in the common mold 19. Then, the molten resin is injected and filled, and an insert molded product 9 ″ in which the insert part 9a ″ heated to a predetermined temperature in the previous molding cycle and the molten resin are integrally molded is molded (insert molding process). Here, the multistage control of the clamping force as the second stage of the press working process described above, and the insert molding process performed in the first mold cavity (cooling of the insert molded product 9 ″ to be cooled and solidified by injection filling) If there is a part where the multistage control necessary for the solidification process) cannot be achieved, priority is given to the multistage control of the clamping force as the second stage of the former press working process, and the dimensional stability of the insert part 9a "is ensured. At this stage, the molten resin is injected and filled into the first mold cavity 30 and the subsequent multistage control necessary for the insert molding process may be performed. In this case, it goes without saying that the predetermined temperature in the insert component heating step is set in consideration of the temperature drop of the insert component 9a ″.

  After the mold clamping force is applied, if the insert molding process is started in the first mold cavity 30 and the pressing process and the insert part heating process are continued in the first sealed space, the subsequent molding process is an example. 2 is basically the same as FIG. 2C to FIG. 3B, the difference in the basic configuration of the third embodiment described above from the first embodiment, and FIG. 2C to FIG. In FIG. 3B, if the insert part 9a (insert part 9a ′) is replaced with the insert part 9a ″ and the insert molded part 9 is replaced with the insert molded part 9 ″, it is easy to understand the molding process of the third embodiment. Therefore, the description of the subsequent molding process is omitted.

  Also in the third embodiment, it goes without saying that during the mold clamping, at least a part of the insert molding process, the pressing of the insert part for the next molding cycle and the heating of the processed insert part can be performed in parallel. Yes. Further, the dummy plate 6 'is configured as a press working mold, and the first rotating mold 20 and the second rotating mold 21 combined therewith are not only injection molding molds but also press working molds. By being configured, in the insert part heating step, the insert part can be pressed almost simultaneously, so that at least a part of the insert part and the press part of the insert part for the next molding cycle can be overlapped. Further, as in the apparatus for manufacturing a molded article of Patent Document 2, these molds are not arranged in series on one mold mounting surface, but one on one mold mounting surface and in the mold opening / closing direction. Insert parts placed and pressed so as to face each other are held in the rotating mold part as they are, and are moved to a position facing the common mold by the rotation process. And the step of transporting the insert part to the injection molding apparatus and holding (inserting) it on the mold cavity surface of the mold can be omitted. Furthermore, according to the arrangement and configuration described above, an insert molded product having a size corresponding to the size of the apparatus or the mold mounting surface can be formed, and there is no need to attach a shearing mold to the injection molding apparatus. The number of molds to be used is 4 (2 sets).

  The present invention is not limited to the above embodiment and can be implemented in various forms. For example, in Embodiments 1 and 2, the metal insert component is used. However, the present invention is not limited to this, and the present invention is generally applied to insert components made of a material having a significantly different linear expansion coefficient from the resin to be injected and filled. Has the same effect.

  Further, in Example 3, the metal plate 9d is supplied and pressed by the pressing process. However, the present invention is not limited to this, and the sheet is capable of plastic deformation because the linear expansion coefficient is significantly different from the resin to be injected and filled. The present invention can achieve the same effect even if an insert part that has been pressed into a shape close to the design surface in advance is supplied.

  Furthermore, in the third embodiment, it is preferable that the unnecessary portion of the supplied metal plate 9d is cut by shearing at an appropriate timing of the mold clamping operation. However, the unnecessary portion is not punched during the mold clamping operation. Used as a holding part to hold the insert part in the mold, and after being transferred to the outside of the injection molding device, the unnecessary part is removed or the part that becomes unnecessary after pressing in the state of a metal plate is cut in advance. It is also possible to supply a metal plate.

DESCRIPTION OF SYMBOLS 1 Injection molding apparatus 3 Fixed board 4 Rotating metal mold | die support mechanism 5 Movable board 6 Dummy plate 6 'Dummy plate (mold for press work)
6a Heating means 6a 'Heating means 6b Temperature measuring means 9 Insert molded product 9' Insert molded product 9 "Insert molded product 9a Insert component 9a 'Insert component 9a" Insert component 9b Resin portion 9b' Primary molded product 9c Secondary molded product 9d Metal plate 19 Common mold 19 'Common mold 20 First rotating mold 20' First rotating mold 21 Second rotating mold 21 'Second rotating mold 30 First cavity 30' First cavity 31 Second cavity 31 ′ Second cavity 33 First sealed space 33 ′ Sealed space 34 Second sealed space 40 Rotating mold part 41 Rotating mold mounting part

Claims (3)

A fixed plate,
Movable plate,
A rotating mold support mechanism disposed between the fixed platen and the movable platen;
In an injection molding apparatus comprising
A common mold attached to the stationary platen;
Combined by clamping and the common mold have at least two mold parting surface to form a mold cavity, by the rotary die support mechanism rotatably supported by the rotary axis perpendicular to the mold opening and closing direction A rotating mold part that is moved in the mold opening and closing direction ;
Attached to the movable platen, a dummy plate to form a closed space in combination with the rotary mold unit by clamping,
The dummy plate is disposed on a surface facing the mold dividing surface of the rotating mold portion of the dummy plate, and in the sealed space, the dummy plate or the metal insert part held in the rotating mold portion is directly Or a heating means capable of heating from a position separated by a predetermined distance;
The temperature of the metal insert part which is disposed on the surface of the dummy plate facing the mold dividing surface of the rotating mold portion and held in the dummy plate or the rotating mold portion in the sealed space. Temperature measuring means capable of measuring in contact or non-contact;
An insert molding method is performed by attaching an insert molding die composed of:
The common mold, the rotating mold part, and the dummy plate are clamped, and a mold cavity formed between the common mold and the rotating mold part is injected and filled with molten resin, and the rotation is performed. An insert molding step of integrally molding the metal insert part and the molten resin held at a position facing the common mold of the mold part;
In the closed space formed between the dummy plate and the rotating mold part by clamping the common mold, the rotating mold part, and the dummy plate, the dummy plate or the rotating mold An insert part heating step of heating the metal insert part held by a part to a temperature substantially equal to a plasticizing melting temperature of the molten resin by the heating means;
In a state where the sealed space is maintained, the dummy plate and the rotating mold part are opened from the common mold, and then an insert molded product is taken out between the common mold and the rotating mold part. Process,
Have
At least a part of the insert molding step and the insert component heating step is overlapped, and the insert component heating step is completed simultaneously with or after completion of the product take-out step.   In the state where the metal insert part is held at a position facing the common mold of the rotating mold part, during the closing of the rotating mold part to the common mold, or after closing the mold, 2. The insert molding method according to claim 1, wherein the metal insert part for the next molding cycle is supplied and held on one of the dummy plate and the rotating mold part. The dummy plate and the rotating mold part are pressed into the mold cavity shape of the rotating mold part by clamping the metal insert part held by the dummy plate or the rotating mold part. It is configured as a press working mold
In the insert component heating step, a pressing step of pressing the metal insert component held in the dummy plate or the rotating mold part into a mold cavity shape of the rotating mold part by clamping. The insert molding method according to claim 1, wherein the insert molding method is performed.

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