JP6365237B2 - Mold with pattern for molding beads synthetic resin molding - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a patterned mold for molding a bead-method foamed synthetic resin molded product having a pattern on its surface in order to increase commercial value, which is used for a heat insulating container or a packaging material.

In the bead method foaming synthetic resin molding, a thermoplastic resin foam bead is filled in a molding space (cavity) formed by a pair of molds consisting of a convex mold (core mold) and a concave mold (cavity mold). It is heated and inflated with steam to be fused, cooled and dried to obtain a molded product having a required shape. The mold is supplied with steam from outside into the mold, and from inside the mold. In order to discharge the steam to the outside, it is necessary to provide a steam hole communicating with the inside and outside of the mold.
As a molded article by such a bead method foam synthetic resin molding, there is a bead method foam synthetic resin molded product (hereinafter referred to as “molded product with a surface pattern”) having a pattern on the surface in order to increase commercial value. For the molding, a mold with a pattern in which a concavo-convex pattern such as a metal mesh or a punching metal is previously transferred to the mold surface is used (for example, see Patent Documents 1 and 2).

As a method of providing a steam hole in the patterned mold, it is common to drill a large number of pores having a diameter of about 1 mm at positions corresponding to the uneven pattern (for example, see Patent Document 1). By forming the vapor holes as pores at positions corresponding to the uneven pattern, the traces of the vapor holes generated on the surface of the molded article with the surface pattern are made inconspicuous.
Further, as a method of providing the steam hole in the patterned mold, a general configuration in which the steam hole is formed by a core vent is adopted, and the mold space is surfaced on the molding space side surface of the core vent which is driven into the vent hole formed in the mold. Some of them have patterns (for example, protrusions extending in two directions formed in a lattice shape) that match the concavo-convex pattern (see, for example, Patent Document 2), and the pattern is formed on the surface of the core vent on the molding space side. As a result, the core vent trace generated on the surface of the molded article with the surface pattern is made inconspicuous.

Registered Utility Model No. 3045015 Japanese Patent No. 5103121

In the conventional beaded foam synthetic resin-molded mold as in Patent Document 1, a large number of pores having a diameter of about 1 mm formed at positions corresponding to the concavo-convex pattern are used as vapor holes. The required amount of steam for inflating and fusing the foamed beads cannot be efficiently supplied.
Therefore, the steam supply at the time of molding is limited, and the fusion becomes insufficient, and the molding cycle becomes longer and the productivity is lowered.

Moreover, in the conventional beaded foam synthetic resin-molded mold as in Patent Document 2, it is necessary to manufacture a special-shaped core vent, and when the uneven pattern on the mold surface is changed, the pattern Since it is necessary to manufacture the core vent which formed the pattern match | combined with, metal mold manufacturing cost increases.
In addition, when the core vent is driven into the vent hole, it is necessary to match the angle of the core vent around the driving direction axis with the surrounding pattern, and it is necessary to consider that the pattern of the core vent and the surrounding pattern do not deform. Since the workability of driving the core vent is lowered, the mold manufacturing cost further increases.

  As described above, from the standpoint of improving the productivity of beaded foam synthetic resin molding and suppressing the increase in mold manufacturing costs, there is significant room for improvement in conventional beaded foam synthetic resin molded molds. There is.

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that a bead method foamed synthetic resin molding that can improve productivity when molding a molded product with a surface pattern and can suppress an increase in mold manufacturing cost. It is to provide a mold with a pattern.

  In order to solve the above problems, the bead-method foam synthetic resin molding pattern mold according to the present invention fills a molding space formed by a pair of convex and concave molds with thermoplastic resin foam beads. The foamed beads are heated and inflated with steam to be fused, cooled, and dried to obtain a molded product having a required shape with a convex or concave pattern on the surface. A mold with a pattern, wherein a vapor hole through which the steam passes is formed by a core vent that is driven into a vent hole formed in the pair of molds, and the molded product is formed on at least one mold surface of the pair of molds. Provided with a plurality of concave depressions or projections having an outer shape larger than the inner diameter of the vent hole for attaching the convex pattern or the concave pattern to all or a part of the concave depressions or the convex projections. S hand, characterized by comprising forming said vent hole in their outer regions (claim 1).

According to such a configuration, a convex pattern or a concave pattern is formed on the molded product by the concave depression or convex protrusion provided on the mold surface, and is formed in the outer region of the concave depression or convex protrusion. Since the core vent is driven into the vent hole, the trace of the core vent formed on the surface-patterned molded product is not visually noticeable, so the surface of the surface-patterned molded product can be seen beautifully, increasing the commercial value. .
In addition, since the vapor holes are formed by the core vent, forming the concave recesses or convex protrusions more than the required number of core vents in the mold, and forming the required number of vent holes in them, it is possible to mold A sufficient aperture ratio can be easily secured.
Therefore, there is no reduction in the aperture ratio due to the use of pores unlike the beaded foam synthetic resin molding patterned mold of Patent Document 1, so that the steam supply at the time of molding is limited and the fusion becomes insufficient. In addition, in all steps such as raw material filling, vacuum cooling, and vacuum drying, productivity is not lowered due to a long molding cycle, so that productivity can be improved.
In addition, a normal-shaped core vent is used without using a special-shaped core vent in which a pattern matching the uneven pattern of the mold as in Patent Document 2 is used, and as in the mold of Patent Document 2. It is not necessary to drive the core vent into the vent hole with the angle of the core vent around the driving direction axis aligned with the surrounding pattern, and it is necessary to take care not to deform the core vent pattern or the surrounding pattern when driving the core vent into the vent hole. Nor.
Therefore, compared with the bead method foam synthetic resin molding pattern mold of Patent Document 2, the mold manufacturing cost can be reduced.

Here, the part including the concave dent or the convex protrusion in the mold provided with the concave dent or the convex protrusion is formed as a separate plate as a patterned plate, and the above-mentioned frame member of the mold It is preferable that the patterned plate be removable.
According to such a configuration, since the patterned plate provided with the concave depression or the convex projection is detachable from the frame member of the mold, the patterned plate can be easily replaced. A convex pattern or a concave pattern formed on a molded article with a surface pattern can be quickly changed simply by exchanging.
In addition, since it is easy to replace the patterned plate with a patternless plate without a concave dent or convex protrusion, a molded product without a convex pattern or a concave pattern can be obtained by exchanging with a patternless plate. The mold can be quickly changed to manufacture.
Thus, it is very economical because it is not necessary to manufacture a different mold every time the surface condition of the mold is changed to a different surface pattern or pattern.

Also, the plate with a pattern is attached / detached by a countersunk screw inserted into a mounting hole formed in the concave depression or the convex projection, and the countersunk screw formed on the die surface side of the mounting hole It is more preferable to embed the head of the above (claim 3).
According to such a configuration, the mounting hole into which the countersunk screw is inserted is formed in the concave depression or the convex projection, and the metal of the mounting hole is attached in a state where the plate with the pattern is attached to the frame member of the mold. The head of the countersunk screw is embedded in the counterbore formed on the mold surface side, so the trace of the countersunk screw formed on the surface-patterned molded product is not visually noticeable. Product value is not impaired.

A bead method foamed synthetic resin molded product having a convex pattern or a concave pattern on the surface according to the present invention is formed using the beaded foam synthetic resin molded pattern mold (claim). 4).
According to such a configuration, since the core vent mark is located in the convex pattern or concave pattern formed in the molded product with the surface pattern by the concave depression or convex projection provided on the mold surface, the molding with the surface pattern is performed. Since the core vent mark formed on the product is not visually conspicuous, the surface of the molded product with the surface pattern can be seen beautifully, and the commercial value can be increased.
In addition, when the molded product with a surface pattern is a container, it is stored in a low temperature warehouse or an ultra low temperature warehouse by forming a convex pattern or a concave pattern on the top surface (upper surface), side surface or bottom surface (lower surface) of the container. In this case, even if ice adheres to the containers or the floor due to the presence of water adhering to the surface of the containers, the containers can be easily separated and separated, so that workability is greatly improved.

Here, a container for courier service comprising a container body having an upper surface formed by a bottom plate having a rectangular shape in plan view and a side wall having a rectangular shape in plan view, and a lid member having a rectangular shape in plan view that covers the opening, It is preferable that the convex pattern or the concave pattern is attached to the position where the label is attached (Claim 5).
According to such a configuration, since the concave depression or convex protrusion provided on the mold surface has an outer shape larger than the inner diameter of the vent hole (the outer diameter of the core vent), molding with a surface pattern which is a container for home delivery The convex pattern or the concave pattern formed on the product has a relatively large outer shape.
Therefore, after pasting and using labels such as invoices on the part where the convex pattern or concave pattern is formed, since the area of the pasted part is small, it is easy to peel off the label, and the peeling mark becomes difficult to stand out. Since the beauty of the surface is not impaired, it is suitable for reuse of the courier container. In particular, when a convex pattern is attached to a courier container that is a molded product with a surface pattern, it can be removed by inserting a finger between the convex patterns under the label and placing the finger on the label The label peeling work becomes easier.
In addition, the label can be easily peeled off from the courier container that is a molded product with a surface pattern, and when the courier container is discarded, the foamed synthetic resin can be prevented from being mixed with, for example, paper labels. Labor container disposal work can be greatly saved.

As described above, according to the mold with a pattern for molding a bead method synthetic resin according to the present invention,
(1) Since the steam holes are formed by the core vent, forming the concave recesses or convex protrusions more than the required number of core vents in the mold, and forming the required number of vent holes in the mold, Since a sufficient opening ratio can be secured easily, there is no reduction in the opening ratio due to the use of pores unlike the beaded foam synthetic resin-molded mold of Patent Document 1, so that steam supply during molding is limited. As a result, the fusion is not insufficient, and in all processes such as raw material filling, vacuum cooling, and vacuum drying, the productivity is not lowered due to a long molding cycle, so that productivity can be improved.
(2) Since a normal-shaped core vent is used instead of a special-shaped core vent, no special consideration is required when driving the core vent into the vent hole. Can reduce mold manufacturing costs compared to molds with
(3) By using a plate with a pattern that can be attached to and detached from the frame member of the mold, the plate with a pattern can be easily replaced. Therefore, it is formed into a molded product with a surface pattern simply by replacing the plate with a pattern. The ability to quickly change the convex or concave pattern,
There are remarkable effects such as.

Moreover, according to the bead method foamed synthetic resin molded product with a convex pattern or a concave pattern on the surface according to the present invention,
(4) Since the core vent mark is located in the convex pattern or the concave pattern formed on the molded article with the surface pattern by the concave depression or convex projection provided on the mold surface, the molded article with the surface pattern is formed. Since the core vent trace is not visually noticeable, the surface of the molded product with a surface pattern can be seen beautifully, increasing the product value.
(5) When the molded product with a surface pattern is a container, by forming a convex pattern or a concave pattern on the top surface (upper surface), side surface or bottom surface (lower surface) of the container, When stored, even if ice adheres to the container or the floor due to the presence of water on the surface of the container, the container can be easily separated and peeled off, so that workability is greatly improved.
(6) If the molded product with a surface pattern is a courier container and is provided with a convex pattern or a concave pattern at the position where the surface label is applied, the convex pattern or the concave pattern After sticking a label such as an invoice on the part where the mark is formed, the area of the sticking part is small, so the label is easy to peel off and the peeling mark is not noticeable, so the surface beauty is not impaired Therefore, it is suitable for reuse of courier containers,
(7) Since it is easy to peel off the label from the courier container that is a molded product with a surface pattern, and when the courier container is discarded, it can prevent the foamed synthetic resin from being mixed with, for example, paper labels. A great deal of labor can be achieved in the disposal of courier containers,
There are remarkable effects such as.

It is a perspective view of the metal mold | die with a pattern for bead method foaming synthetic resin molding which concerns on embodiment of this invention. It is an exploded perspective view similarly. It is the perspective view seen from the metal mold | die surface side of the plate with a pattern which comprises a concave mold. It is the perspective view similarly seen from the metal mold | die back side. It is a principal part expansion longitudinal cross-sectional view which shows the structural example which enables the plate with a pattern to be removable with respect to a concave frame member. It is a perspective view which shows the molded article with a surface pattern which concerns on embodiment of this invention. It is a perspective view which shows the example which uses the molded article with a surface pattern as a container for home delivery. It is the figure seen from the metal mold | die surface side which shows the modification of the pattern of a plate with a pattern, and the example where a concave hollow is round shape is shown. It is the figure seen from the metal mold | die surface side which shows the modification of the pattern of a plate with a pattern, and the example whose concave hollow is rectangular shape is shown. It is a principal part expansion perspective view which shows the surface of the molded article with a surface pattern, and has shown the example of the convex pattern formed in the round shape using the metal mold | die whose concave depression is round shape.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste.

As shown in the perspective view of FIG. 1 and the exploded perspective view of FIG. 2, the bead-processed synthetic resin-molded pattern-molding mold 1 according to the embodiment of the present invention used for molding a surface-patterned molded article. Further, it is composed of a convex mold (core mold) 2 and a concave mold (cavity mold) 3 that form a molding space, and is used by being attached to a general molding apparatus (not shown).
The convex mold 2 and the concave mold 3 are made of, for example, an aluminum alloy, and are manufactured by machining or casting.
The concave mold 3 is formed of a frame member 3A and a patterned plate 3B that is formed separately from the frame member 3A and is detachably attached to the frame member 3A.
On the patterned plate 3B, concave depressions B, B,... Having a larger outer shape than the inner diameter of the vent hole 4 are formed on the mold surface F side by machining.

In the convex mold 2 and the concave mold 3, steam holes communicating with the inside and outside of the mold are formed by the core vents 5, 5,.
That is, the convex mold 2 has the mold surface (molding surface) side flush with the normal-shaped core vents 5, 5,... With respect to the vent holes 4, 4,. Type in.
Further, the concave mold 3 is provided with a core vent 5, 5,... In a normal shape in a part of the concave depressions B, B,. It is driven so as to be flush with the concave surfaces of the concave recesses B, B,... On the mold surface (molding surface) side.
Here, the “normally-shaped core vent” is not a special shape that forms a pattern on the surface of the molding space in Patent Document 2, but is a cap-like shape in which a large number of slits or small holes are formed. A mass-produced product. In the present embodiment, a case where a core vent having a large number of slits is used as a core vent having a normal shape.

The bead-method foaming synthetic resin molding using the patterned mold 1 is performed by thermoplasticity from the raw material inlet (raw material filling opening) 8 into the molding space formed by the convex mold 2 and the concave mold 3 using the molding apparatus. Filled with resin foam beads, expanded and fused by heating the foam beads with steam, and after cooling and drying, by inserting the mold release pin through the mold release pin 9, 9, ... A molded product with a surface pattern of a required shape is obtained.
Here, as the foamed synthetic resin used for the bead method foamed synthetic resin molding, for example, a foamed polyolefin resin or a foamed polystyrene resin is used.
When the foamed synthetic resin is a foamed polyolefin-based resin, it is possible to mold a surface-patterned molded article that has excellent strength and heat resistance and has oil resistance and chemical resistance using the patterned mold 1.
Further, when the foamed synthetic resin is a foamed polystyrene-based resin, it is possible to mold a molded product with a surface pattern that is excellent in heat insulation and shock absorption and is lightweight and low-cost using the patterned mold 1.

As shown in the perspective view seen from the mold surface F side in FIG. 3 and the perspective view seen from the mold back surface R side in FIG. 4, the patterned plate 3B has a vent hole 4 on the mold surface F. Are formed with hexagonal concave depressions B, B,... That are larger than the inner diameter of 4,..., And a vent hole 4 is formed in each of the concave depressions B, B,. The core vent 5 is driven by forming.
The attachment of the patterned plate 3B to the frame member 3A is performed using the eight attachment holes 7, 7,... Formed in the eight concave depressions B, B,. The mounting screws are screwed into the screw holes 3C, 3C,.
That is, as shown in the enlarged vertical sectional view of the main part of FIG. 5, the operation of inserting the countersunk screw 6 which is a mounting screw into the mounting hole 7 of the patterned plate 3B and screwing into the screw hole 3C of the frame member 3A, Performed at the 8 locations.

In the state where the patterned plate 3B is attached to the frame member 3A through this operation, the heads 6A, 6A,... Of the countersunk screws 6, 6, ... are on the mold surface F side of the attachment holes 7, 7,. Embedded in the counterbore 7A, 7A,.
Accordingly, the mounting holes 7, 7,... Through which the countersunk screws 6, 6,... Are inserted are formed in the concave depressions B, B,... And the patterned plate 3B is attached to the frame member 3A. The countersunk screws 7A, 7A,... Formed on the die surface F side of the mounting holes 7, 7,... Are embedded with the heads 6A, 6A,. Since the traces of the countersunk screws 6, 6,... Formed on the product are not visually conspicuous, the commercial value of the surface-patterned molded product is not impaired by the traces of the countersunk screws 6, 6,.
The through holes 3D, 3D,... Of the frame member 3A shown in FIG. 2 are formed in accordance with the core vents 5, 5,. is there.

According to the configuration of the patterned mold 1 (the convex mold 2 and the concave mold 3) as described above, the steam holes are formed by the core vents 5, 5,. By providing the depressions B, B,... In the mold and forming the required number of vent holes 4, 4,..., A sufficient opening ratio for molding can be easily secured.
Therefore, there is no reduction in the aperture ratio due to the use of pores unlike the beaded foam synthetic resin molding patterned mold of Patent Document 1, so that the steam supply at the time of molding is limited and the fusion becomes insufficient. In addition, in all steps such as raw material filling, vacuum cooling, and vacuum drying, productivity is not lowered due to a long molding cycle, so that productivity can be improved.
Further, the core vents 5, 5,... Of the normal shape are used without using the special-shaped core vents in which the pattern matching the concave / convex pattern of the die as in Patent Document 2 is used. It is not necessary to drive the core vent into the vent hole in a state where the angle of the core vent around the driving direction axis matches the surrounding pattern, and the core vent 5 is driven when the core vents 5, 5,. , 5,... And surrounding patterns do not have to be taken into consideration, so that the manufacturing cost of the mold can be reduced as compared with the mold with a beaded foam synthetic resin molding pattern of Patent Document 2.

Further, since the patterned plate 3B provided with the concave depressions B, B,... Can be attached to and detached from the frame member 3A, the patterned plate 3B can be easily replaced. The convex pattern formed on the molded product with the surface pattern can be quickly changed.
Furthermore, since it is easy to replace the patterned plate 3B with a patternless plate without the concave recesses B, B,..., A molded product without a convex pattern can be manufactured by exchanging with the patternless plate. Can quickly change to mold.
Thus, it is very economical because it is not necessary to manufacture a different mold every time the surface condition of the mold is changed to a different surface pattern or pattern.

A bead-method foamed synthetic resin molded product 10 having convex patterns A, A,... On the surface, which is a molded product with a surface pattern shown in the perspective view of FIG. ), And convex patterns A, A,... Are formed on the surface of the molded article 10 with a surface pattern at positions corresponding to the concave depressions B, B,. At the same time, core vent marks C, C are formed at positions corresponding to the core vents 5, 5,.
In such a molded article 10 with a surface pattern, since the core vent marks C, C,... Are located in the convex patterns A, A,... Formed by the concave depressions B, B,. Since the core vent traces C, C,... Are not visually conspicuous, the surface of the surface-patterned molded article 10 can be seen beautifully, so that the commercial value can be increased.

The perspective view of FIG. 7 shows an example in which the molded article 10 with a surface pattern is used as a courier container D.
The courier container D includes a container body 11 having an upper surface formed by a bottom plate 11A having a rectangular shape in plan view and side walls 11B, 11C, 11D, and 11E having a rectangular shape in plan view, and a rectangular shape in plan view that covers the opening. The lid 12 is formed. In the example shown in FIG. 7, the lid body 12 is a molded article 10 with a surface pattern, but the container body 11 may be a molded article with a surface pattern so as to give a convex pattern to the bottom surface or side surface of the container body 11. .

A convex pattern A, A, having an outer shape larger than the outer diameter of the core vents 5, 5,... At a position where a label L such as a feeding shape on the surface (upper surface) of the lid 12 of the courier container D of FIG. Since the label L is pasted and used, since the area of the pasted portion is small, the label L can be easily peeled off and the peeled trace becomes inconspicuous. Therefore, it is suitable for reuse of the courier container D.
Further, since the convex patterns A, A,... Are attached at the positions where the labels L are affixed, a finger is inserted between the convex patterns A, A,. The label can be peeled more easily because it can be peeled off. In FIG. 7, the convex pattern A, A,... Is provided on substantially the entire surface of the lid body 12, and an example in which the label L is attached to a part of the convex pattern A, A,. Of course, convex patterns A, A,...
Furthermore, the label L can be easily peeled off from the courier container D, and when the courier container D is discarded, the foamed synthetic resin can be prevented from being mixed with, for example, paper L, the label L. Can greatly save labor.
Furthermore, in a container such as a courier container D or the like, a convex pattern A, A,... Is formed on the top surface (upper surface), side surface or bottom surface (lower surface) of the container, so that it is stored in a low temperature warehouse or an ultra low temperature warehouse. In this case, even if ice adheres to the containers or the floor due to the presence of water adhering to the surface of the containers, the containers can be easily separated and peeled, so that workability is extremely improved.

In FIG. 7, an example is shown in which convex patterns A, A,... Are attached to substantially the entire surface of the lid body 12, and a protruding strip E is attached to the peripheral edge of the lid body 12. In such a case, by forming a shape in which a part or a plurality of portions of the ridge E is cut out, a fluid such as water staying in the ridge E can be discharged, or the container D, This is preferable because an effect of promoting the circulation of the cold air when D,. In the case where such an effect is expected more, it is more preferable that the lid 12 has a shape in which the protruding edge E is not provided on the periphery.
Further, in the case where the convex patterns A, A,... Are provided on substantially the entire bottom surface of the container D, the container D is stacked by forming a shape in which no protruding strip edge is provided on the periphery of the bottom surface of the container D. Even when the lowermost container D is in contact with the ground, it can be expected to have a water draining effect and a cold air circulation effect, and it has less frictional resistance when moving the lowermost container D by dragging, reducing the labor of the operator. This is also preferable because it also contributes to the effect.

8 and 9 are views seen from the mold surface F side showing a modification of the patterned plate 3B. FIG. 8 shows an example in which the concave depressions B, B,... Are round, and FIG. An example in which the recesses B, B,... Are rectangular is shown.
Here, the concave depressions B, B,... May be hexagonal, round, rectangular, or may have a heart shape, a triangular shape, or the like, and have an outer shape larger than the inner diameter of the vent holes 4, 4,. If it is.
If the concave recesses B, B,... Are circular, they can be easily processed by groove processing with a square end mill.

FIG. 10 shows the surface of a surface-patterned molded article 10 obtained by molding a polystyrene foam resin with the patterned mold 1 using the patterned plate 3B in which the concave depressions B, B,... It is a principal part expansion perspective view.
FIG. 10 shows that the core vent marks C, C,... Formed in the convex patterns A, A,.

In the above description, the example in which the concave mold 3 is configured by the frame member 3A and the patterned plate 3B has been described, but the concave mold 3 may be an integral mold.
Moreover, in the above description, although the example which forms the concave dent B, B, ... in the concave mold 3 was shown, depending on the use purpose etc. of the molded article with a surface pattern, the convex mold 2 is made from the concave dent B, B, ... A pattern may be provided, and at least one of the convex mold 2 and the concave mold 3 may be provided with a pattern.
Furthermore, in the above description, the vent holes 4, 4,... Are formed in a part of the concave depressions B, B,... And the core vents 5, 5,. ... are formed in a number corresponding to the required number of core vents 5, 5, ..., and vent holes 4, 4, ... are formed in all of the concave depressions B, B, ..., and the core vents 5, 5, ... may be driven. .
Furthermore, a convex protrusion such as a hexagonal shape, a round shape, a rectangular shape, a heart shape or a triangular shape is formed on the die surface (molding surface) of the patterned die 1 instead of the concave depressions B, B,. In such a case, a concave pattern is formed at a position corresponding to the convex protrusion in the molded article with a surface pattern.

1 Mold with pattern 2 Convex type (core type)
3 Concave type (cavity type)
3A Frame member 3B Patterned plate 3C Screw hole 3D Through hole 4 Vent hole 5 Core vent 6 Countersunk screw (mounting screw)
6A Head 7 Mounting hole 7A Counterbore 8 Raw material inlet (raw material filling opening)
9 Opening for mold release pin 10 Molded product with surface pattern 11 Container body 11A Bottom plate 11B, 11C, 11D, 11E Side wall 12 Cover A Convex pattern B Concave depression C Core vent mark D Courier container E Convex rim F Mold Surface L Label R Mold back

Claims (5)

The molding space formed by a pair of convex and concave molds is filled with foamed beads of thermoplastic resin, and the foamed beads are heated with steam to be inflated and fused, cooled and dried to obtain a surface. It is a mold with a pattern used for molding a beaded synthetic resin to obtain a molded product of a required shape with a convex pattern or a concave pattern on,
A steam hole through which the steam passes is formed by a core vent that is driven into a vent hole formed in the pair of molds,
A plurality of concave depressions or convex protrusions having an outer shape larger than the inner diameter of the vent hole for attaching the convex pattern or the concave pattern to the molded product are provided on at least one mold surface of the pair of molds. ,
A beaded foam synthetic resin-molded mold, wherein the vent hole is formed in the outer region of each of the concave depression or the convex protrusion in whole or in part.   A part including the concave depression or the convex protrusion in the mold provided with the concave depression or the convex protrusion is separately formed as a patterned plate, and the patterned plate with respect to the frame member of the mold The mold with a pattern for molding a beaded synthetic resin according to claim 1, wherein the mold is removable.   Detachment of the plate with the pattern is performed by a countersunk screw inserted into a mounting hole formed in the concave depression or the convex protrusion, and a head of the countersunk screw is formed in a counterbore formed on the mold surface side of the mounting hole. 3. A mold with a pattern for molding a beaded synthetic resin according to claim 2, wherein the portion is embedded.   A beaded foamed synthetic resin molded with a convex or concave pattern on the surface, molded using the beaded foamed synthetic resin-molded mold according to any one of claims 1 to 3. Goods.   A container for courier service comprising a container body having an upper surface formed by a bottom plate having a rectangular shape in plan view and a side wall having a rectangular shape in plan view, and a lid member having a rectangular shape in plan view that closes the opening, the label on the surface being The bead-method foamed synthetic resin molded product having a convex pattern or a concave pattern on the surface according to claim 4, wherein the convex pattern or the concave pattern is added to a position to be attached.