JPH11333858A - Molding die device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a smooth mold releasing of a culture container out of a movable die in the case of molding the culture container body which cannot provide an ejector pin to an inner surface of a bottom wall portion to be mirror finished. SOLUTION: A core insert 71 of a movable die 22 is constructed of an insert body and a front edge plate 75 fixed at the front edge at the fixed die side of the insert body. An air passage 76 is formed at the central portion between these insert body and the front edge plate 75 and a slit-like outflow port 77 having a width of about several μm is formed at the peripheral portion. The air passage 76 is communicated with the outside of the movable die 22. The outflow port 77 is opened at the position forming the inner surface of a side wall portion 3 of the culture container body 1. When a stripper plate 55 strips the front edge of the side wall portion 3, the air flows in between the culture container body 1 and the core insert 71 from the outflow port 77, thereby avoiding the vacuum state therein. This permits the smooth mold release of the culture container body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die apparatus used for injection molding of an incubator made of a thermoplastic resin, and more particularly, to a structure for releasing a molded product from a mold.

[0002]

FIG. 6 shows an incubator body 1 which is a molded article formed by molding a transparent resin. The incubator main body 1 has a disc-shaped bottom wall 2 and a cylindrical side wall 3 that is bent almost vertically from the entire periphery of the bottom wall 2 and rises. It is in shape. Although not shown, the incubator includes, in addition to the incubator main body 1, a similar container-shaped lid that covers the incubator main body 1 from above and covers an upper surface opening thereof. The bottom wall 2
Since the inner surface, ie, the upper surface, is used for observation with a microscope, the surface roughness must be a mirror surface, and there should be no gate trace or ejector pin trace due to molding.

When molding such an incubator body 1,
As shown in FIG. 7, using a mold apparatus having a fixed mold 6 and a movable mold 7 which are opened and closed in the axial direction of the incubator body 1, the outer surface of the incubator body 1 is fixed by the fixed mold 6 on the material supply side. And the movable mold 7 forms the inner surface side of the incubator body 1. In this case, there is no problem because the trace of the gate 8 is formed on the outer surface of the incubator body 1. Further, when the mold is opened after molding, the molded incubator body 1 is first fixed mold due to the difference in the mold release resistance between the fixed mold 6 side and the movable mold 7 side due to the draft set on the side wall 3 or the like. Move away from 6. Further, the incubator main body 1 must be released from the movable mold 7. However, as described above, the inner surface of the bottom wall 2 must not have an ejector pin mark or the like. The plate 9 is pressed to release the incubator main body 1 from the movable mold.

However, in order to make the inner surface of the bottom wall portion 2 a mirror surface as described above, the surface forming the bottom wall portion 2 of the movable mold 7 is mirror-finished. The space between the inner surface of the portion 2 and the inner surface of the portion 2 is brought into a vacuum state to be in a close contact state, and the release resistance becomes extremely high. Therefore, when the incubator body 1 is to be released by the stripper plate 9,
While the side wall portion 3 is protruded, the bottom wall portion 2 tends to stay in the movable mold 7, so that the mold release is not performed smoothly and a stress mark or a crack is generated on the incubator body 1. there were.

[0005] One means for solving such a problem is to increase the thickness of the incubator main body 1 to increase the rigidity of the incubator main body 1 itself so that the incubator main body 1 is hardly deformed. There is. However, this means is uneconomical due to the large amount of material used, and cannot be adopted when the incubator body 1 itself has standard dimensions.

Therefore, conventionally, as shown in FIG. 7, means for forming a concave portion 10 at a position where the movable die 7 forms a front edge of the inner surface of the side wall 3 is employed. The convex portion 11 is formed in the incubator main body 1 by the concave portion 10. However, since the concave portion 10 and the convex portion 11 have an undercut shape in the releasing direction, the releasing is not forcibly performed. . During this forcible removal, the side wall portion 3 is elastically deformed radially outward.
A gap is formed between the side wall 3 and the movable mold 7. Since air enters between the incubator main body 1 and the movable mold 7 through this gap, the mold release resistance is reduced. However, by this means,
There is a possibility that the incubator main body 1 may be damaged or damaged by the force applied by forcible removal. Further, even if a gap is formed between the distal end side of the side wall portion 3 and the movable mold 7, since this is a position distant from the bottom wall portion 2, the movable mold 7 and the bottom wall portion 2 are in a vacuum state. 7, it was difficult for air to enter smoothly and the release resistance could not be sufficiently reduced.

The present invention is intended to solve such a problem, and even in a case where an ejector pin cannot be provided on a bottom wall portion, a molding metal capable of smoothly releasing a container-like product from a mold. It is intended to provide a mold device.

[0008]

According to a first aspect of the present invention, there is provided a container-shaped product having a bottom wall and a side wall bent from a peripheral edge of the bottom wall. In a molding apparatus, a first mold forming an outer surface of a product, a second mold opening and closing with respect to the first mold to form an inner surface of the product, A projecting means for projecting a molded product provided on the mold at a tip edge of a side wall portion thereof, and an outlet opening to a position forming an inner surface of the side wall portion of the product in the second mold body; An air passage for communicating the outlet with the outside of the mold body is formed.

At the time of molding, first, the first mold and the second mold are closed, and a product-shaped cavity formed between the first mold and the second mold is placed in the cavity. Fill the molding material. After the molding material has solidified, the first mold and the second mold are opened. At this time, the molded product is first
Away from the second mold and remain in the second mold. Next, the tip of the side wall of the product is protruded by the protruding means, and the product is separated from the second mold. At this time, air flows into the space between the product and the second mold from the outlet located at the position corresponding to the inner surface of the side wall portion of the product through the air passage in the second mold. The vacuum between the two molds is eliminated. As a result, the release resistance of the product is reduced, and
Separate smoothly from the mold. Since the outlet is located at the position corresponding to the inner surface of the side wall of the product, there is no trace of the outlet on the inner surface of the bottom wall of the product.

According to a second aspect of the present invention, in the molding die apparatus of the first aspect, the outlet is formed at a position corresponding to a corner near a bottom wall and a side wall of the product. It was done.

As described above, the outlet is brought as close as possible to the bottom wall of the product at a position corresponding to the side wall of the product, so that there is no trace of the outlet on the inner surface of the bottom wall of the product. The vacuum state between the bottom wall and the second mold can be more effectively eliminated.

According to a third aspect of the present invention, in the molding die apparatus according to the first or second aspect, the second mold body includes a plurality of diffusion-bonded block members, and a gap between the block members is provided. A part which is not diffusion-bonded is left in a part of the part, and the outflow port and the air passage are formed by this part.

That is, the air flows out between the product and the second mold through an air passage and an outlet formed by a gap between the plurality of block members constituting the second mold. In particular, by using diffusion bonding for joining the block materials, the degree of freedom in combining the shapes of the plurality of block materials is increased, and the joining can be reliably performed. Can be reliably flowed along the predetermined air passage and the outlet.

According to a fourth aspect of the present invention, in the molding die apparatus according to the first to third aspects of the present invention, an air supply device for supplying compressed air is connected to the air passage.

When the product is released from the second mold, compressed air is supplied from an air supply device, and the product and the second mold are discharged from the outlet through the air passage of the second mold. Spray. Thereby, the vacuum state between the product and the second mold body can be more reliably eliminated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a molding die apparatus according to the present invention will be described with reference to FIGS. Reference numeral 21 denotes a fixed mold as a first mold, and reference numeral 22 denotes a movable mold as a second mold. The fixed mold 21 and the movable mold 22 move up and down in the figure to open and close with each other. A plurality of cavities 23 and 24 are formed between them. In the cavities 23 and 24, the incubator body 1 shown in FIG.
And a second cavity 24 for molding the lid of the incubator. The fixed mold 21 forms the outer surface of the incubator body 1 and the lid, and the movable mold 22 forms the inner surface of the incubator body 1 and the lid. A draft angle is set in the incubator main body 1 and the side wall 3 of the lid.

The fixed mold 21 has a fixed mounting plate 26 mounted on a fixed platen of an injection molding machine (not shown).
And a fixed mold plate 28 attached via a frame-shaped spacer block 27 to the lower side of the fixed attachment plate 26 in the drawing, that is, to the movable mold 22 side. Further, the fixed side mounting plate 26
A manifold 29 is provided between the fixed mold plate 28 and the fixed mold plate 28.

A sprue bush 31 to which a nozzle of an injection molding machine is connected is fixed to the manifold 29. The sprue bush 31 penetrates the fixed side mounting plate 26, and the inside becomes a sprue 32. ing. The outer surface of the sprue bush 31 has a band heater 33 for heating.
Is provided. Further, in the manifold 29,
A runner 34 is formed to branch the sprue 32 into the cavities 23 and 24. In addition, manifold
29 is provided with a heater 35 for heating.

The movable mold 22 in the fixed mold plate 28
A plurality of cavity inserts 41 and 42 are embedded and fixed at the side position. These cavity inserts 41, 42
Form cavities 23 and 24, respectively.
Further, a valve casing 43 is fixed through the fixed side mold plate 28 and the cavity inserts 41 and 42 so as to correspond to the cavities 23 and 24, respectively. The inside of the valve casing 43 is a material passage 44 communicating with the final branch of the runner 34 of the manifold 29. Gates 45 and 46 are provided on the surfaces of the cavity inserts 41 and 42 that form the cavities 23 and 24 so as to face the distal end openings of the material passages 44 in the valve casing 43 and communicate the material passages 44 with the cavities 23 and 24. Are formed. In each valve casing 43, a valve pin 47 that moves in the mold opening and closing direction of the fixed mold 21 and the movable mold 22 to open and close the gates 45 and 46 is provided.
Are stored respectively. These valve pins 47 also penetrate the manifold 29, and the fixed mold plate 28
It is driven by a hydraulic cylinder 48 provided in the apparatus. A band heater 49 for heating is provided on the outer peripheral side of the valve casing 43.

The movable mold 22 has a movable mounting plate 51 mounted on a movable platen of an injection molding machine, and a frame-shaped spacer block 52 on the upper side of the movable mounting plate 51 in the drawing, that is, on the fixed mold 21 side. With the movable side receiving plate 53 attached,
The movable mold plate 54 is fixed to the movable mold receiving plate 53 on the fixed mold 21 side. Also, the fixed type of the movable side mold plate 54
On the 21 side, a stripper plate 55 as a projecting means is supported movably within a predetermined range in the mold opening and closing direction. The stripper plate 55 is for releasing the molded incubator main body 1 and the lid from the movable mold 22 by protruding the leading edge of the side wall 3 thereof. Further, an ejector plate 56 is supported between the movable mounting plate 51 and the movable receiving plate 53 so as to be movable within a predetermined range in the mold opening and closing direction.

The ejector plate 56 has a guide pin 61 fixed between the movable mounting plate 51 and the movable receiving plate 53 and a guide bush 62 fixed to the ejector plate 56, which are slidably fitted to each other. It is supported by doing. Further, the ejector plate 56 is urged toward the movable-side mounting plate 51 by a coil spring 63 mounted between the ejector plate 56 and the movable-side receiving plate 53. Further, the ejector plate 56
The ejector rod receiver 64, which is pushed toward the fixed mold 21 by the ejector rod of the injection molding machine,
It is fixed to the side surface. This ejector rod receiver 64
Penetrates the movable-side mounting plate 51. Further, guide pins 66 fixed to the ejector plate 56 pass through the movable-side receiving plate 53 and the movable-side mold plate 54 and are fixed to the stripper plate 55 by bolts 67, whereby the stripper plate 55 is connected to the ejector plate 56. And move integrally.
A guide pin 66 is slidably fitted in a guide bush 68 fixed to the movable-side receiving plate 53 in a penetrating state, whereby the stripper plate 55 is securely guided with respect to the movable-side receiving plate 53. It is supposed to be.

The movable mold plate 54 has core inserts 71, 7
2 is embedded and fixed. These core inserts 71,72
Is slidably penetrated through the stripper plate 55,
And the cavity insert 4 of the fixed mold 21
The cavities 23 and 24 are formed between the cavities 1 and 42, respectively.

Then, as shown in FIG.
The core insert 71 forming the inner surface of the insert insert 73 has a nest body 73 as a block material and a bolt on the fixed mold 21 side of the nest body 73.
A tip plate 75 as another block material fixed by 74 is provided. The tip plate 75 forms a portion of the bottom wall portion 2 and the side wall portion 3 on the bottom wall portion 2 side of the incubator main body 1, and the nesting body 73 forms a portion of the side wall portion 3 on the front edge side. is there. That is, the outer peripheral portion of the boundary between the nesting body 73 and the end plate 75 is located at a position corresponding to the intermediate portion of the inner surface of the side wall portion 3. The surface of the end plate 75 forming the inner surface of the bottom wall 2 to be observed by the microscope is opposed to the fixed die 21 by mirror finishing.

An air passage 76 is formed at the center between the nest body 73 and the end plate 75, and a plurality of slit-shaped passages from the air passage 76 to the outer peripheral surface of the core nest 71 are formed. An outlet 77 is formed. The outlet 77 is open at a position forming an intermediate portion of the inner surface of the side wall 3 of the incubator main body 1. Further, although exaggeratedly shown in the drawings, the width of the outlet 77 is about several μm, which allows gas to pass therethrough but does not allow resin filling the cavities 23 and 24 to enter. That is, the outlet 77 does not cause burrs on the incubator body 1 as a product. The air passage 73 communicates with the outside of the movable mold 22 via an air passage 78 formed in the nesting body 73 and an air passage 79 formed in the movable receiving plate 53 and the like. Furthermore, in this air passage 75,
An air supply device 81 provided outside the movable mold 22 for supplying compressed air may be connected. The air supply device 81 is not essential, but is preferably provided.

Next, the operation of the above configuration will be described. In molding, first, the fixed mold 21 and the movable mold 22 are closed. In this state, between the fixed mold 21 and the movable mold 22, cavities 23 and 24 in the shape of a product, that is, the incubator body 1 and its lid are formed. Thereafter, the valve pin 47 is moved to the side opposite to the movable mold 22 to open the gates 45 and 46, and the molten thermoplastic resin as a molding material is injected into the sprue 32 from the nozzle of the injection molding machine. The resin flows from the sprue 32 through the runner 34 in the manifold 29 and the material passage 44 in the valve casing 43, and passes through each gate 45, 4
From 6 is filled in each cavity 23,24. Thereafter, after the pressure is maintained, the valve pin 47 is moved toward the non-movable mold 22 to close the gates 45 and 46.

Further, after the resin filled in the cavities 23 and 24 is cooled and solidified, the fixed mold 21 and the movable mold 22 are opened. At this time, the molded incubator main body 1 and the lid are fixed due to a difference in release resistance between the fixed mold 21 forming the outer surface side of the incubator main body 1 and the lid and the movable mold 22 forming the inner surface side. It separates from the mold 21 and stays at the core insert 71 of the movable mold 22. Thereafter, the ejector rod of the injection molding machine pushes the ejector plate 56 toward the fixed mold 21, whereby the stripper plate 55 fixed via the ejector pins 66 to the ejector plate 56 is fixed as shown by a chain line in FIG. It is moved to the mold 21 and the molded incubator main body 1 and the lid are placed on the side wall 3 thereof.
At the leading edge of the movable mold 22 and released from the core insert 71 of the movable mold 22.

At this time, the air passage 7 communicating with the outside of the movable mold 22
2, 9, 78, 76, as shown by the arrow in FIG.
In 1, air flows into the space between the inner surface of the incubator body 1 and the outer surface of the core insert 71 from an outlet 77 opened at a position forming the inner surface of the side wall portion 3 of the incubator body 1. This allows
A vacuum state between the inner surface of the incubator body 1 and the outer surface of the core insert 71, particularly the surface of the mirror-finished end plate 75 facing the fixed mold 21 and the inner surface of the bottom wall 2 of the incubator body 1 Can be eliminated. Thereby, the release resistance of the incubator main body 1 is reduced, and the incubator main body 1 is smoothly separated from the movable mold 22. In addition, air is inserted between the inner surface of the incubator main body 1 and the core.
Although it may be allowed to flow naturally between the outer surface of the incubator 71 and the outer surface of the incubator 71, compressed air is supplied from the air supply device 81 to the air passages 79, 78 and 76, and the inner surface of the incubator main body 1 and the core insert are supplied from the outlet 77. You may make it inject | pour between the outer surfaces of 71.

The incubator main body 1 and the lid thus released from the mold are fixed by a take-out device (not shown).
It is taken out from between 21 and movable mold 22. Thereafter, the fixed mold 21 and the movable mold 22 are closed again, the above steps are repeated, and the molding is repeated. The mold apparatus is of a hot runner type, and the thermoplastic resin in the sprue 32, the runner 34 and the material passage 44 is always kept in a molten state by the heating of the heaters 33, 35 and 48.

As described above, according to the configuration of the above embodiment, when the molded incubator main body 1 is protruded and released from the movable mold 22, the incubator is supplied from the air passages 79, 78, 76 and the outlet 77. When the air flows between the inner surface of the main body 1 and the outer surface of the core insert 71, the distal end surface of the core insert 71 forming the inner surface of the bottom wall 2 of the incubator main body 1 on the fixed mold 21 side is mirror-finished. Despite the finishing, the vacuum state between the inner surface of the incubator main body 1 and the outer surface of the core insert 71 can be eliminated, whereby
The incubator body 1 can be smoothly released from the movable mold 22 even though no ejector pin is provided for the bottom wall 2. Therefore, when releasing the mold, the incubator body 1
Can be prevented from being applied to the incubator main body 1 to cause damage such as stress marks or cracks. In addition, since the outlet 77 is located at a position corresponding to the inner surface of the side wall 3 of the incubator main body 1, the trace of the outlet 77 is not formed on the inner surface of the bottom wall 2 of the incubator main body 1 used for microscopic observation. Can not.

Further, using an air supply device 81, an outlet 77
From the inner surface of the incubator body 1 and the outer surface of the core insert 71 by forcibly sending and ejecting compressed air between the inner surface of the incubator body 1 and the outer surface of the core insert 71. Can be more reliably eliminated, and the incubator main body 1 can be released from the movable mold 22 more smoothly.

Further, the outlet 77 and the air passages 76, 78, 79
When the resin is filled in the cavities 23 and 24, the cavities 23 and 24 also function as gas vents for removing air from the cavities 23 and 24.

In the mold apparatus of the first embodiment, it is particularly necessary to eliminate the vacuum contact state between the incubator main body 1 and the core insert 71, but the core insert forming the lid is required. A similar air passage and air outlet may also be formed at 72.

Next, a second embodiment of the molding die apparatus of the present invention will be described with reference to FIG. Parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the second embodiment, the core insert of the movable mold 21 is used.
The peripheral portion of the abutting surface between the nesting body 73 and the end plate 75 constituting the 71 is formed into tapered surfaces 86 and 87 which are inclined radially outward toward the fixed mold 21 side. Therefore, the outlet 77 formed as a gap between the nesting body 73 and the end plate 75 is also inclined in the same direction.
The outlet 77 is located on the inner surface of the side wall 3 of the incubator main body 1 and at a position corresponding to the vicinity of a corner between the side wall 3 and the bottom wall 2.

The particular problem of the close contact between the incubator body 1 and the core insert 71 is that the top surface of the mirror-finished end plate 75 and the bottom wall 2 of the incubator body 1 formed by the mirror are finished. Between the inner surface. Therefore, as in the second embodiment, the outlet
By bringing 77 as close as possible to the bottom wall 2 at a position corresponding to the side wall 3, the vacuum state between the bottom wall 2 and the core insert 71 can be more effectively eliminated, and the incubator body 1 can be moved. The mold can be more smoothly released from the mold 22. In addition, since the outlet 77 is located at a position corresponding to the side wall 3, no trace of the outlet 77 is formed on the inner surface of the bottom wall 2 to be observed by the microscope.

Next, a third embodiment of the molding die apparatus of the present invention will be described with reference to FIG. Parts corresponding to those in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted. The molding die apparatus of the third embodiment relates to the molding of a container-like product 1A having a bottom wall 2A and a side wall 3A, which is also the same as that of the incubator body 1 of the previous embodiment. Nesting body 91 which is a plurality of block members constituting core nesting 71 forming the inner surface side of 1A
And the tip tube 92 are diffusion bonded to each other. The nest body 91 has a columnar surface 91a substantially parallel to the mold opening and closing direction of the fixed die 21 and the movable die 22 on the outer peripheral side of the distal end portion of the fixed die 21 side, and a diameter substantially perpendicular to the columnar surface 91a and from the base end thereof. And a step surface 91b extending outward in the direction. Further, in the tip tube 92, the inner peripheral surface is a column surface 92a that fits into the column surface 91a of the nesting main body 91, and the end surface is a flat surface 92b that abuts the step surface 91b of the nesting main body 91. I have. The nest body 91 forms the inner surface of the bottom wall 2A of the product 1A by the tip surface of the fixed mold 21 side, and the tip tube 92 has the side wall of the product 1A by the conical outer surface of the tip side. It forms the inner surface of the portion 3A. In addition, in the gap between the nest body 91 and the tip tube 92, there are pillar surfaces 91a,
An air passage 93 is formed at a position from an intermediate portion of the hole 92a to the step surface 91b and the flat surface 92b, and an air passage 94 is formed in the nested body 91 so as to communicate with the air passage 93 in a straight line. . That is, the air passage 93 is formed by a concave groove formed on the outer peripheral surface of the insert body 91 and the inner peripheral surface of the distal end cylinder 92.

The diffusion bonding between the nest body 91 and the tip tube 92 in the third embodiment uses a welding solvent like brazing. And before being put in the heating furnace,
The solvent is disposed only on the outer peripheral side of the step surface 91b of the nest body 91 and the flat surface 92b of the tip tube 92, and penetrates only between the step surface 91b and the flat surface 92b, and the upper part of the illustration between the column surfaces 91a and 92a. Does not penetrate until. The gap between the column surfaces 91a and 92a communicates with the air passage 93, and the gap between the side wall 3A and the bottom wall 2A at a position corresponding to the inner surface of the side wall 3A of the product 1A in the core insert 71. A slit-like outlet 95 opened near the corner between the two is formed.
The width of the outlet 95 is about several μm.

Therefore, the molded product 1A is
When the mold is released from the core insert 71 of the
3 and flows from the outlet 95 between the product 1A and the core insert 71.

As in the third embodiment, diffusion bonding is used to join a plurality of blocks constituting the core insert 71, thereby increasing the degree of freedom in combining the shapes of the plurality of blocks and joining. Can be assured. Therefore, the air passages 93 and 94 and the outlet 95 having a free shape can be formed, and the air can reliably flow along the predetermined air passages 93 and 94 and the outlet 95 without causing leakage.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
In the first and second embodiments, the molding of the incubator main body 1 has been described as an example.
Also, it can be applied to the molding of various container-shaped products. As means for forming the air passage and the outlet therefor, various means other than those in the above-described embodiments can be adopted.

[0040]

According to the first aspect of the present invention, in the molding die apparatus for molding a container-shaped product, the inner surface of the side wall portion of the product is formed on the second mold body forming the inner surface side of the product. Since the outlet opening at the position where the air flows and the air passage communicating the outlet with the outside of the mold are formed, when the product is released from the second mold, the product passes through the air passage and the outlet to form the first and second passages. Even if the ejector pin cannot be provided on the bottom wall portion due to the inflow of air between the second mold and the air being released between the second mold, the product can be smoothly moved from the second mold. It can be released. Further, it is not necessary to form a trace of the outlet on the inner surface of the bottom wall.

According to the molding die apparatus of the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the outlet corresponds to the vicinity of the corner between the bottom wall and the side wall of the product. Since it is formed at the position where it does, the vacuum state between the bottom wall portion of the product and the second mold body can be more effectively eliminated without causing a trace of the outlet on the inner surface of the bottom wall portion of the product, The product can be released from the second mold more smoothly.

According to the molding die apparatus of the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, the gap between the plurality of diffusion-bonded block members provided in the second mold body is provided. By leaving the part that is not diffusion-bonded to a part and forming the outlet and the air passage by this part, the air passage and the outlet of a free shape can be formed, and the bonding is ensured by diffusion bonding, The air can be reliably flowed along the predetermined air passage and the outlet.

According to the molding die apparatus of the fourth aspect of the invention, in addition to the effects of the first to third aspects of the present invention, in addition to the effects of
Since the air supply device that supplies the compressed air is connected, by positively injecting the compressed air from the outlet, the vacuum state between the product and the second mold can be more reliably eliminated,
The product can be released from the second mold more smoothly.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a molding die apparatus of the present invention.

FIG. 2 is an enlarged cross-sectional view showing the vicinity of a molded product according to the first embodiment.

FIG. 3 is a perspective view of the core insert.

FIG. 4 is a sectional view showing a second embodiment of the molding die apparatus of the present invention.

FIG. 5 is a sectional view showing a third embodiment of the molding die apparatus of the present invention.

FIG. 6 is a perspective view of an incubator body which is a product to be molded.

FIG. 7 is a cross-sectional view showing an example of a conventional molding die apparatus.

[Explanation of symbols]

 1 Incubator body (product) 1A product 2, 2A bottom wall 3, 3A side wall 21 Fixed type (first type) 22 Movable type (second type) 55 Stripper plate (projecting means) 76 Air passage 77 Outlet 78 Air passage 79 Air passage 81 Air supply device 91 Nest body (block material) 92 Tip tube (block material) 93 Air passage 95 Outlet

Claims (4)

[Claims] 1. A molding die apparatus for molding a container-like product having a bottom wall and a side wall bent from a peripheral edge of the bottom wall, a first mold body forming an outer surface side of the product. When,
A second mold body that opens and closes with respect to the first mold body to form an inner surface side of the product, and a protruding means provided on the second mold body for projecting a molded product at a leading edge of a side wall portion thereof. Wherein the second mold body is provided with an outlet opening at a position forming an inner surface of the side wall of the product, and an air passage communicating the outlet with the outside of the mold body. Mold equipment. 2. The molding die apparatus according to claim 1, wherein the outlet is formed at a position corresponding to a vicinity of a corner between a bottom wall and a side wall of the product. 3. The second mold body includes a plurality of diffusion-bonded blocks, and leaves a part that is not diffusion-bonded in a part of a gap between the blocks. 3. The molding die apparatus according to claim 1, wherein an air passage is formed. 4. The molding apparatus according to claim 1, wherein an air supply device for supplying compressed air is connected to the air passage.