JP2001293753A - Injection molding machine for composite molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an alleviation of a load of a rotary actuator, a reduction in a size of the actuator, an enhancement of a reduction in a weight and a simplification of an injection molding machine by separating a heavy mold from a revolving system by obtaining a composition molding by rotating a molding support block without revolving a first molding lower mold, a first molding upper mold, a second molding lower mold and a second molding upper mold. SOLUTION: The injection molding machine for the composite molding comprises a primary molding and a molding support block 11 for rotating the composite molding while supporting the composite molding, the first molding lower mold 36 and the first molding upper mold 38 disposed on a periphery of the block 11, a first injection unit 41 for injecting a resin between the mold 36 and the mold 38, the second molding lower mold 37 and the second molding upper mold 42 disposed on the periphery of the block 11, and a second injection unit 44 for injecting a resin of a different type between the mold 31 and the mold 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding apparatus for a composite molded product represented by a two-color molded product.

[0002]

2. Description of the Related Art Dials of dial telephones and keys of keyboards of computers are widely used in an injection molding method in which a primary molded product is injection-molded and a different resin is injected into the primary molded product to add characters. This molding method is called a two-color or multicolor molding method. As an apparatus capable of performing such a two-color or multi-color molding method, for example, Japanese Utility Model Publication No. Sho 61-12087, "Synthetic resin molding apparatus" has been proposed.

According to FIG. 1 of the publication, the rotary core molds 4, 4 ', 4 are provided on four surfaces of a quadrangular column-shaped rotating disk 5 (the reference numerals are diverted to those described in the publication). ", 4 '"
And the primary cavity mold 11 on the left side of the figure is matched with one of the rotating core molds 4, 4 ′, 4 ″, and 4 ′ ″ (for example, the rotating core mold 4) to form 1. The primary molding 30 is obtained by injecting resin from the metering / injection device 12 into the next cavity. The rotating disk 5 is rotated clockwise by 180 ° so that the rotating core mold 4 and the primary molded product 30 face the secondary cavity mold 9. This secondary cavity mold 9 is matched with the rotary core mold 4 and measured and added to the formed secondary cavity.
Another resin is injected from the injection device 12 ′ to form the secondary molded product 31.
Is molded. Thus, the secondary molded product 31 is added to the primary molded product 30.
Finished product (equivalent to composite molded product, two-color molded product) with 40
Can be obtained.

In FIGS. 3 and 4 of the above-mentioned publication, three rotating core dies 4, 4 and 4 are placed on a rotating disk 5 and one of them is exposed to a measuring / injecting device 12. The primary molding is performed, and the rotary disk 5 is rotated by 1/3 turn, so that the rotary core mold 4 is exposed to the measuring / injection device 12 ′ to perform the secondary molding. An apparatus capable of obtaining a three-color molded product by rotating the core three times to make the rotary core mold 4 face the metering / injection device 12 ″ and performing tertiary molding is shown.

[0005]

As described above, in the conventional multi-color molding apparatus, three to four or more dies are moved and successively exposed to the measuring / injection apparatus to perform the multi-color molding. The mold used at this time is heavy and has a large heat capacity.

[0006] A plurality of heavy dies are placed on a rotating plate and the start, the constant speed rotation, and the stop are repeated at predetermined angles. However, since the total weight of the dies is large, the moment of inertia (GD ² ) increases. The need for an electric motor with a large output and a brake system with good stopping accuracy are required, and expensive motors, brakes and their control devices are required, which leads to an increase in the price of the molding device.

[0007] If the heat capacity is large, the mold is difficult to cool. As a result, the solidification of the molten resin filled in the cavity is delayed, and the productivity is reduced. In order to avoid this, the mold is forcibly cooled with cooling water, but the mold becomes complicated and expensive due to the provision of the water passage.

[0008]

According to a first aspect of the present invention, there is provided an injection molding apparatus for obtaining a composite molded product in which a primary molded product is covered with a resin different from the resin constituting the molded product. In this injection molding apparatus, a molded article support block for rotating while supporting a primary molded article and a composite molded article, a first molding lower mold portion for molding the primary molded article,
A first injection molding stage composed of a molding upper mold part, a first injection device for injecting a resin between the first molding lower mold part and the first molding upper mold part, and a first molding part for covering different kinds of resin with each other; Second
A molding lower mold part, a second molding upper mold part, and the second molding lower mold part;
A second injection molding stage comprising a second injection device for injecting a different resin between the second molding upper mold portions is a constituent element, and the first injection molding stage and the second injection molding stage are arranged around the molded article support block. And an injection molding stage.

The composite molded article is formed by rotating the molded article support block without rotating the first molded lower mold section and the first molded upper mold section and the second molded lower mold section and the second molded upper mold section. obtain.
Heavy molds (the first molding lower mold part and the first molding upper mold part,
By separating the lower mold section and the second upper mold section) from the revolving system, the burden on the rotary actuator is reduced. In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency.

According to a second aspect of the present invention, there is provided an injection molding apparatus for obtaining a composite molded article in which a primary molded article is covered with a resin different from the resin constituting the molded article. A molded article support block that rotates while supporting a composite molded article, a first molded lower mold part for molding a primary molded article, a first molded upper mold part, and a first molded lower mold part and a first molded upper mold. A first injection molding stage composed of a first injection device for injecting a resin between the parts, a second molding lower mold part, a second molding upper mold part for covering a primary molded article with a different kind of resin, and the second molding Second injection of different kinds of resin between lower mold part and second molding upper mold part
A second injection molding stage comprising an injection device and a molded product take-out stage for taking out the completed composite molded product are constituent elements, and the first molded stage is provided around the molded product support block.
An injection molding stage, a second injection molding stage, and a molded product take-out stage are arranged in this order.

The composite molded article is formed by rotating the molded article support block without rotating the first molded lower mold section and the first molded upper mold section and the second molded lower mold section and the second molded upper mold section. obtain.
Heavy molds (the first molding lower mold part and the first molding upper mold part,
By separating the lower mold section and the second upper mold section) from the revolving system, the burden on the rotary actuator is reduced. In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency.

By arranging the three stages around the molded article support block, inspection and management of each stage are facilitated. Then, the molded product take-out stage is changed to the first and second stages.
Since it is provided separately from the injection molding stage, the composite molded product can be taken out in parallel with the injection molding, and the production efficiency can be increased.

According to a third aspect of the present invention, there is provided an injection molding apparatus for obtaining a composite molded article in which a primary molded article is covered with a resin different from the resin constituting the molded article. A molded article support block that rotates while supporting a composite molded article, a first molded lower mold part for molding a primary molded article, a first molded upper mold part, and a first molded lower mold part and a first molded upper mold. A first injection molding stage consisting of a first injection device for injecting a resin between the parts, a cooling or heating stage for forcibly cooling or heating the primary molded product, and dissimilar resin for the cooled or heat-treated primary molded product A second injection molding comprising a second molding lower mold portion to be covered, a second molding upper mold portion, and a second injection device for injecting a different kind of resin between the second molding lower mold portion and the second molding upper mold portion. A stage as a component, and a periphery of the molded article support block. In, characterized in that a said first injection molding stage and the cooling or heating stage and the second injection molding stage, in this order.

The composite molded product is formed by rotating the molded product support block without rotating the first molded lower mold portion and the first molded upper mold portion and the second molded lower mold portion and the second molded upper mold portion. obtain.
Heavy molds (the first molding lower mold part and the first molding upper mold part,
By separating the lower mold section and the second upper mold section) from the revolving system, the burden on the rotary actuator is reduced. In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency.

By arranging the three stages around the molded article support block, inspection and management of each stage becomes easy. Then, the primary molded product released from the first molding lower mold part and the first molding upper mold part is directly cooled or heated. The cycle time can be further reduced by forcibly cooling. Thermal adjustment becomes possible by forcibly heating.

According to a fourth aspect of the present invention, there is provided an injection molding apparatus for obtaining a composite molded article in which a primary molded article is covered with a resin different from the resin constituting the molded article. A molded article support block that rotates while supporting a composite molded article, a first molded lower mold part for molding a primary molded article, a first molded upper mold part, and a first molded lower mold part and a first molded upper mold. A first injection molding stage consisting of a first injection device for injecting a resin between the parts, a cooling or heating stage for forcibly cooling or heating the primary molded product, and dissimilar resin for the cooled or heat-treated primary molded product A second injection molding comprising a second molding lower mold portion to be covered, a second molding upper mold portion, and a second injection device for injecting a different kind of resin between the second molding lower mold portion and the second molding upper mold portion. Stage and removal of molded product to take out the completed composite product As a component of the stage, the around the workpiece carrier block, characterized in that the first injection molding stage and the cooling or heating stage and the second injection molding stage and the demold stage arranged in this order.

The composite molded article is formed by rotating the molded article support block without rotating the first molded lower mold section and the first molded upper mold section and the second molded lower mold section and the second molded upper mold section. obtain.
Heavy molds (the first molding lower mold part and the first molding upper mold part,
By separating the lower mold section and the second upper mold section) from the revolving system, the burden on the rotary actuator is reduced. In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency.

By arranging the four stages around the molded article support block, inspection and management of each stage becomes easy. Then, the molded product take-out stage is changed to the first and second stages.
Since it is provided separately from the injection molding stage, the composite molded product can be taken out in parallel with the injection molding, and the production efficiency can be increased. Further, the primary molded product released from the first molding lower mold part and the first molding upper mold part is directly cooled or heated. The cycle time can be further reduced by forcibly cooling. Thermal adjustment becomes possible by forcibly heating.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The embodiment according to claim 1 will be described with reference to FIG. 8, the invention according to claim 2 will be described with reference to FIG. 9, and the invention according to claim 3 will be described with reference to FIG. Such an embodiment will be described in detail with reference to FIGS.

FIG. 1 is a plan layout view of a four-stage injection molding apparatus for a composite molded product according to the present invention. The orientations shown in the corners of the figure (N = north, W = west, S = south, E = east) ) Can be described in combination with an injection molding device for a composite molded product (hereinafter, referred to as an injection molding device).
Abbreviated as "injection molding apparatus". 10) A molded article support block 11 having a square cross section is arranged at the center, and a molded article take-out stage 12 is arranged on the N side, a first injection molding stage 13 is arranged on the W side, and an S side is surrounded by the molded article support block 11. A cooling or heating stage 14 and a second injection molding stage 15 on the E side are laid out. The detailed structure will be described below.

That is, the four stages 12, 13, 1
4 and 15 were arranged around the molded article support block 11 at a 90 ° pitch. When a plurality of stages are collectively arranged, the device configuration of that portion becomes complicated, and inspection, repair, and management become difficult. In this regard, in this example, since the stages 12, 13, 14, and 15 are laid out on the north, south, east, west, and east, inspection and management of the stages 12, 13, 14, and 15 are facilitated.

FIG. 2 is a sectional view (corresponding to a sectional view taken along line 2-2 in FIG. 1) of the four-stage injection molding apparatus according to the present invention.
The left side is the W side and the right side is the E side. In this cross section, the injection molding apparatus 10 includes a lower fixed die plate 22 that supports a lower die 21, an upper movable plate 24 that supports an upper die 23, and an upper movable plate 2.
(A plurality of tie bars 25... Extending from 4 and penetrating the lower die fixing plate 22, and hanging on the lower ends of these tie bars 25. The passed mold opening / closing cylinder fixing plate 26, the mold opening / closing cylinder 27 that moves the mold opening / closing cylinder fixing plate 26 up and down with respect to the lower mold fixing plate 22, and a rotating post suspended rotatably on the upper mold movable plate 24. 28, a molded article support block 11 integrally provided below the rotary post 28, a pin-shaped core 31 extending horizontally from the molded article support block 11, and so on.
And a rotary actuator 32 attached to the lower die fixing plate 22.
And a drive shaft 33 extending upward from the rotary actuator 32 and inserted into the molded article support block 11.
The drive shaft 33 is formed by a spline 34 on the molded article support block 1.
1, the lifting of the molded article support block 11 is not hindered.

The lower mold 21 has a first lower mold section 36 on the W side and a second lower mold section 37 on the E side. The upper mold 23 has a first molding upper mold portion 38 on the W side and a resin passage 39 for guiding the resin to the first molding upper mold portion 38, and the first injection device 41 faces the resin passage 39. , E side is provided with a second upper mold portion 42 and a resin passage 43 for guiding the resin to the second upper mold portion 42, and the second injection device 44 faces the resin passage 43. In the figure, reference numeral 45 denotes a linear bearing, which is a component interposed to smoothly move the rotary post 28 up and down with respect to the upper mold 23.

FIG. 3 is an operation diagram of FIG. 2. When the mold opening / closing cylinder 27 lowers the mold opening / closing cylinder fixing plate 26 as shown by an arrow, the upper mold movable plate 24 is lowered via the tie bars 25. At a certain point, the molded article support block 11 descends together with the upper mold movable platen 24, and then the molded article support block 11 hits the lower mold 21 and stops, and in parallel, the upper mold 23 moves to the lower mold 21. Hit. That is, the mold is completed. What is important here is that the first molding lower mold portion 36
The upper mold is set so that the pin-shaped core 31 faces a predetermined position between the upper molding portions 38 and the pin-shaped core 31 faces a predetermined position between the second lower molding portion 37 and the second upper molding portion 42. 23 and the lower mold 21 sandwich the molded article support block 11 from above and below.

As shown in the drawing, the first injection device 41 injects the resin between the first molding lower mold part 36 and the first molding upper mold part 38,
The second molding lower mold part 37 and the second molding upper mold part 4 are formed by the injection device 44.
The resin can be injected between the two.

FIG. 4 is another sectional view (corresponding to a sectional view taken along the line 4-4 in FIG. 1) of the four-stage injection molding apparatus according to the present invention, in which the left side is the S side and the right side is the N side. Injection molding device 10
In this cross section, the lower mold 21 placed on the lower mold fixing plate 22 is
Are provided with an upper blowing nozzle 47 on the S side of the
A lower blow nozzle 48... Is provided on the S side of the upper mold 23 supported by the
9 to indicate that the cylinder 49 is provided with the molded article hooking tool 51. The number of the upper blowing nozzles 47 and the number of the lower blowing nozzles 48 are arbitrary, and it is not possible to install only one of the upper blowing nozzles 47 and the lower blowing nozzles 48. No problem.

FIG. 5 is an operation diagram of FIG.
4 shows a state in which 4 is lowered to a predetermined lower limit position. At this time, the molded product hooking tool 51 is engaged with the molded product pushing tool 53.
On the S side, the upper blowing nozzles 47 are attached to the pin-shaped core 31.
And the lower blowing nozzles 48... Are sufficiently close to each other, so that a cooling gas (or a hot gas) can be appropriately sprayed toward a primary molded product (not shown) fitted on the pin-shaped core 31.

The operation of the molding apparatus having the above configuration will be described with reference to FIGS. For convenience of explanation, the pin-shaped core 3
All the tips of 1 were turned to the left. Also, N, W, S,
E corresponds to the orientation shown in FIG.

FIGS. 6A to 6D are views for explaining the first operation of the four-stage injection molding apparatus according to the present invention. (A)
Shows an empty pin-shaped core 31 on the N side (the molded product take-out stage 12 in FIG. 1), and a molded product pusher 53 is fitted into the pin-shaped core 31. The molded article support block 11 shown in FIG. (B) shows a state in which the pin-shaped core 31 faces between the first molding lower mold part 36 and the first molding upper mold part 38 on the W side (the first injection molding stage 13 in FIG. 1). Here, the first injection device 41 injects the resin into the first cavity 55 surrounding the pin-shaped core 31. Thus, a primary molded product can be obtained.

FIG. 3C shows a primary molded product 56 surrounding the pin-shaped core 31. After opening the mold, the molded article support block 1 of FIG.
1 is turned 90 degrees as indicated by the arrow, and the pin-shaped core 31 and the primary molded product 56 are moved from the W side to the S side. (D) shows that the cooling gas is blown from the upper blow nozzles 47... And the lower blow nozzles 48... On the S side (the cooling or heating stage 14 in FIG. 1) to quickly cool the primary molded product 56. . Alternatively, hot gas is blown from the upper blow nozzles 47 and the lower blow nozzles 48 to thermally adjust the primary molded product 56.

FIGS. 7A to 7C are views for explaining a second operation of the four-stage injection molding apparatus according to the present invention. (A)
At the E side (the second injection molding stage 15 in FIG. 1).
Primary molded article 5 between the lower molding section 37 and the second upper molding section 42
Indicates that you have entered 6. A ring-shaped space connected to the resin passage 43 is a second cavity 57, and a different injection resin is injected into the second cavity 57 by the second injection device 44.

(B) shows a secondary molded product 58 called a completed two-color molded product. After the mold is opened, the molded article support block 11 of FIG. 1 is turned by 90 ° as indicated by the arrow, and the pin-shaped core 31 is moved from the E side to the N side. (C), on the N side (the molded product take-out stage 12 in FIG. 1), the molded product discharge cylinder 49 is operated to move the molded product hooking tool 51 to the left in the figure, and as a result, the molded product pusher 53 is moved to the arrow. Sideways like
The secondary molded product 58 is taken out from the pin-shaped core 31.

Returning to FIG. 2, in the present invention, the upper and lower molds 23,
21 is not rotated. That is, the rotating post 28 and the molded article support block 11 separated from the upper and lower molds 23 and 21
To rotate. The rotary post 28 and the molded article support block 11 have sufficiently small moment of inertia (GD ² ), can suppress the output of the rotary actuator 32, and have a small inertial force, so that braking is easy. Therefore, according to the present invention, downsizing and cost reduction of the rotary actuator 32 such as an electric motor can be easily achieved.

Returning to FIG. 1, since only the pin-shaped core 31 having a very small heat capacity is moved, the molded product is removed from the mold when the resin is appropriately solidified without being affected by the temperature of the mold. It can be taken out and moved, shortening the cycle time and greatly increasing production efficiency. In the cooling or heating stage 14, the primary molded product can be effectively cooled or heated with a small amount of heat medium (gas) regardless of the mold.

FIG. 8 is a plan view of a two-stage injection molding apparatus according to the present invention. In this two-stage injection molding apparatus, a molded article support block 11 is arranged at the center and surrounds the molded article support block 11. Thus, the first injection molding stage 13 and the second injection molding stage 15 are laid out, and the secondary molded product 58 as a composite molded product is obtained by rotating the molded product support block 11 at 180 ° tact. Can be. Details of the first injection molding stage 13 and the second injection molding stage 15 have been described in FIGS. It is desirable that the second injection molding stage 15 be disposed at a position of 180 ° with respect to the first injection molding stage 13.
The angle formed is arbitrary.

FIG. 9 is a plan view of a three-stage injection molding apparatus according to the present invention. In this three-stage injection molding apparatus, a molded article support block 11 is arranged at the center and surrounds the molded article support block 11. As described above, the first injection molding stage 13, the second injection molding stage 15, and the molded product take-out stage 12 are laid out. By rotating the molded product support block 11 at 120 ° tact, the composite molded product 2 is formed. The next molded product 58 can be obtained. First
Details of the injection molding stage 13, the second injection molding stage 15, and the molded product take-out stage 12 have been described in FIGS. The angle formed by the first injection molding stage 13, the second injection molding stage 15, and the molded product take-out stage 12 is preferably 120 °, but the angle formed by these stages 13, 15, 12 is arbitrary.

FIG. 10 is a plan view of another three-stage injection molding apparatus according to the present invention. In this three-stage injection molding apparatus, a molded article support block 11 is arranged at the center, and The first injection molding stage 13, the cooling or heating stage 14, and the second injection molding stage 15 are laid out so as to surround the molded product support block 11.
A secondary molded product 58 as a composite molded product can be obtained. Details of the first injection molding stage 13, the cooling or heating stage 14, and the second injection molding stage 15 are shown in FIGS.
Therefore, the description is omitted. Note that the first injection molding stage 13, the cooling or heating stage 14, and the second
The angle formed by the injection molding stage 15 is desirably 120 °, but the angle formed by these stages 13, 14 and 15 is arbitrary.

In this embodiment, a two-, three-, and four-stage type apparatus is exemplified. However, five or more stages may be laid out around the molded article support block 11. The secondary molded article may be any of a composite molded article composed of a plurality of different materials or a multicolor molded article of two colors, three colors or more. Therefore, the final molded product is called a composite molded product.

The pin-shaped core supporting the primary molded product and the secondary molded product is not limited to the pin shape, and may have any shape as long as it can support a molded product such as a fork or a claw. Furthermore, the rotating posts are arranged vertically in principle in the embodiment, but may be arranged obliquely or horizontally.

[0040]

According to the present invention, the following effects are exhibited by the above configuration. The first aspect of the present invention is the first aspect, wherein the first
The injection molding stage and the second injection molding stage are arranged, and the first molding lower mold part and the first molding upper mold part and the second molding lower mold part and the second molding upper mold part are not rotated. Then, the composite molded product is obtained by rotating the molded product support block. As described above, the heavy mold (the first molding lower mold part and the first molding
By separating the upper molding part, the second lower molding part and the second upper molding part) from the swivel system, the load on the rotary actuator can be reduced, and the rotary actuator can be reduced in size. Lightening and compactness of the molding device can be promoted. In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, and the work efficiency can be improved.

According to a second aspect of the present invention, a first injection molding stage, a second injection molding stage, and a molded product take-out stage are arranged around the molded product support block in this order, and a heavy mold (the first molded stage) is provided. A lower mold part and a first molded upper mold part;
By separating the second lower mold section and the second upper mold section) from the revolving system, the burden on the rotary actuator is reduced.
In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency. By arranging the three stages around the molded article support block, inspection and management of each stage becomes easy.

Since the molded product take-out stage is provided separately from the first and second injection molding stages, the composite molded product can be taken out in parallel with the injection molding, and the production efficiency can be increased.

According to a third aspect of the present invention, a first injection molding stage, a cooling or heating stage, and a second injection molding stage are arranged in this order around a molded product support block. A lower mold part and a first molded upper mold part;
By separating the second lower mold section and the second upper mold section) from the revolving system, the burden on the rotary actuator is reduced.
In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency. By arranging the three stages around the molded article support block, inspection and management of each stage becomes easy. Then, the primary molded product released from the first molding lower mold part and the first molding upper mold part is directly cooled or heated.
The cycle time can be further reduced by forcibly cooling. Thermal adjustment becomes possible by forcibly heating.

According to a fourth aspect of the present invention, the first injection molding stage, the cooling or heating stage, the second injection molding stage, and the molded product take-out stage are arranged around the molded product support block in this order. The composite molded product is obtained by rotating the molded product support block without rotating the first molded lower mold portion and the first molded upper mold portion and the second molded lower mold portion and the second molded upper mold portion. Heavy mold (1st molding lower mold part and 1st molding
By separating the upper mold portion, the second lower mold portion, and the second upper mold portion) from the rotating system, the burden on the rotary actuator is reduced. In addition, by separating the mold having a large heat capacity from the rotating system, the mold can be released without waiting for the cooling of the mold, thereby improving the work efficiency.

By arranging the four stages around the molded article support block, inspection and management of each stage are facilitated. Then, the molded product take-out stage is changed to the first and second stages.
Since it is provided separately from the injection molding stage, the composite molded product can be taken out in parallel with the injection molding, and the production efficiency can be increased. Further, the primary molded product released from the first molding lower mold part and the first molding upper mold part is directly cooled or heated. The cycle time can be further reduced by forcibly cooling. Thermal adjustment becomes possible by forcibly heating.

[Brief description of the drawings]

FIG. 1 is a plan layout view of an injection molding apparatus for a composite molded article according to the present invention.

FIG. 2 is a sectional view of a four-stage injection molding apparatus according to the present invention (corresponding to a sectional view taken along line 2-2 in FIG. 1);

FIG. 3 is an operation diagram of FIG. 2;

4 is another sectional view of the four-stage injection molding apparatus according to the present invention (corresponding to a sectional view taken along line 4-4 in FIG. 1).

FIG. 5 is an operation diagram of FIG. 4;

FIG. 6 shows a first example of a four-stage injection molding apparatus according to the present invention.
Action explanation diagram

FIG. 7 shows a second example of the four-stage injection molding apparatus according to the present invention.
Action explanation diagram

FIG. 8 is a plan view of a two-stage injection molding apparatus according to the present invention.

FIG. 9 is a plan view of a three-stage injection molding apparatus according to the present invention.

FIG. 10 is a plan view of another three-stage injection molding apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Injection molding apparatus of a composite molded article, 11 ... Molded article support block, 12 ... Molded article removal stage, 13 ... 1st injection molding stage, 14 ... Cooling or heating stage, 15 ... 2nd injection molding stage, 32 ... Rotation Actuator, 36 ...
First molding lower mold part, 37 ... second molding lower mold part, 38 ... first molding upper mold part, 41 ... first injection device, 42 ... second molding upper mold part, 44 ... second injection device, 47 ... Top blow nozzle, 48 ...
Lower blow nozzle, 56: primary molded product, 58: secondary molded product as a composite molded product.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F202 AG03 AH33 CA11 CB01 CB28 CC10 CN01 CN05 CN21 4F206 AG03 AH33 JA07 JB28 JL02 JN12 JN43 JQ81 JT06

Claims (4)

[Claims] 1. An injection molding apparatus for obtaining a composite molded product in which a primary molded product is covered with a resin different from the resin constituting the molded product, the injection molding device comprising a primary molded product and a composite molded product Molded product support block for turning while supporting the first molded product, a first molded lower mold portion for molding a primary molded product, a first molded upper mold portion, and between the first molded lower mold portion and the first molded upper mold portion. A first injection molding stage composed of a first injection device for injecting a resin, a second molding lower mold portion for covering a primary molded product with a different kind of resin,
A second injection molding stage comprising a molding upper mold portion and a second injection device for injecting a different kind of resin between the second molding lower mold portion and the second molding upper mold portion; Wherein the first injection molding stage and the second injection molding stage are disposed around the injection molding apparatus. 2. An injection molding apparatus for obtaining a composite molded article in which a primary molded article is covered with a resin different from the resin constituting the molded article, the injection molding apparatus comprising a primary molded article and a composite molded article Molded product support block for turning while supporting the first molded product, a first molded lower mold portion for molding a primary molded product, a first molded upper mold portion, and between the first molded lower mold portion and the first molded upper mold portion. A first injection molding stage composed of a first injection device for injecting a resin, a second molding lower mold portion for covering a primary molded product with a different kind of resin,
A second injection molding stage comprising a molding upper mold portion, a second molding lower mold portion, and a second injection device for injecting a different kind of resin between the second molding upper mold portion, and a molded product for taking out the completed composite molded product A take-out stage as a component, and wherein the first injection molding stage, the second injection-molding stage, and the take-out stage are arranged in this order around the molded product support block. Molding equipment. 3. An injection molding apparatus for obtaining a composite molded article in which a primary molded article is covered with a resin different from the resin constituting the molded article, the injection molding apparatus comprising a primary molded article and a composite molded article Molded product support block for turning while supporting the first molded product, a first molded lower mold portion for molding a primary molded product, a first molded upper mold portion, and between the first molded lower mold portion and the first molded upper mold portion. A first injection molding stage comprising a first injection device for injecting a resin, a cooling or heating stage for forcibly cooling or heating the primary molded product, and a different resin for covering the cooled or heat-treated primary molded product. A second injection molding stage including a second molding lower mold part, a second molding upper mold part, and a second injection device for injecting a different kind of resin between the second molding lower mold part and the second molding upper mold part. As a component, around the molded article support block, Composite molded injection molding apparatus for the injection molding stage cooling or heating stage and the second injection molding stage, characterized in that arranged in this order. 4. An injection molding apparatus for obtaining a composite molded product in which a primary molded product is covered with a resin different from the resin constituting the molded product, wherein the injection molded device comprises a primary molded product and a composite molded product Molded product support block for turning while supporting the first molded product, a first molded lower mold portion for molding a primary molded product, a first molded upper mold portion, and between the first molded lower mold portion and the first molded upper mold portion. A first injection molding stage comprising a first injection device for injecting a resin, a cooling or heating stage for forcibly cooling or heating the primary molded product, and a different resin for covering the cooled or heat-treated primary molded product. A second injection molding stage including a second molding lower mold part, a second molding upper mold part, and a second injection device for injecting a different kind of resin between the second molding lower mold part and the second molding upper mold part; A molded product take-out stage for taking out the completed composite molded product As a component, a composite molded product characterized in that the first injection molding stage, the cooling or heating stage, the second injection molding stage, and the molded product take-out stage are arranged in this order around the molded product support block. Injection molding equipment.