JPS59501947A - Multilayer wall container and its manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Multilayer wall container and its manufacturing method Technical field The present invention relates to a container having a 1% barrier inner liner and an outer wall. k pertains to multi-walled resin containers, such as injection blow molded resin containers. . More specifically, the present invention provides a method for preventing the inner liner from peeling off from the outer wall of the container. improvements in the design of container rims and methods for tearing such improved containers. Related.

Background technology The present invention provides a polygonal structure consisting of an inner liner and an outer wall supporting the liner. I wall Regarding resin containers.

The inner liner material is superior to the outer wall in terms of moisture, oxygen, and carbon dioxide barrier properties. It is far superior to the resin material that makes up its body. The container liner can be a single layer. However, it may also be a multilayer body made of a number of materials each having a different barrier property χ. However, it is usually difficult to overcome the strain resistance of a single material, so The eel container itself is said to be made of multi-layer tube barrels.

BACKGROUND OF THE INVENTION There are a number of conventional methods for molding cylindrical resin products and containers. So An example of this is the production of multi-walled containers by jet blow molding. This person According to the method, it is prefabricated on a stone mold in a linan injection blow molding machine that has been hot-molded in advance. Insert the stone mold into the entire cavity of the injection molding part, and heat it to a temperature suitable for ejection inside this cavity. The thermoplastic resin is extruded to form a monopolymerized preform or parison. However, the liner consists only of the inner wall. Combined preformed product mounting The resulting stone mold is taken out from the blow-molding nitrogen cavity in step 7 and inserted into the entire cavity of the blowing section.

Between this preform and the stone mold, there is a space between the preform and the stone mold, which is in contact with the wall surface of the entire cavity for molding the preform. Apply sufficient hydraulic pressure to inflate the housing, resulting in a blow-molded container. . After that, after removing the stone mold together with the blow molding container from the 9 cavities for blow molding, Remove the container from the mold. Regarding equipment, raw materials and technology for the manufacture of such containers. Details are given to Donald G. Sower, National Can Corporation. United States @ entry patent No. 4.162.883 and No. 4.309 assigned to ．． No. 380.

By the way, the edges of the inner liner and outer wall are exposed at the lip of the container. In conventional multi-walled containers, the liner can somehow peel off from the rim of the outer wall. If you separate it, it will just look dirty (and become unsanitary.) There was a problem.

Conventional injection molding97. − means injection blow molding In containers according to XT! between the lip of the liner and the rim of the outer wall. t) Area is Although she was small, she could become pregnant. For example, the liner is at most the outer wall entrance edge. As far as the outer edge of It ends at the boundary and goes to ℃. In conventional containers, the tip of the lip of the 13 liner is exposed. There is no peeling or peeling from the outer wall.

As a result, cracks occur. There was also a design problem. For opening and closing container lids At this time, friction may occur between the lid and the inner liner, causing the liner to begin to peel or peel. It may get worse. This is also a big problem. If the material is multi-layered, each layer will separate at the lip. , the cracks became more numerous, Tanitake's P'3'4 proboscis entered into the seven, and the appearance also changed. There was a problem that Nisa TS would disappear.

Therefore, it is possible to prevent or reduce the melting of the liner at the rim of the container. In addition, multi-layer walls made by injection molding or injection blow molding with a solid layer δ are ensured. The utensils were overflowing.

Summary of the invention The disadvantage of Jubei Keijutsu is that the inner liner has a shape that wraps around the mouth of the outer wall. 7 parts are provided, and the integrity of the 7 parts is set to 7, so that the liner peels off at the opening of the container. The solution is to use a container that is unlikely to cause problems. Ding Nawachi , the liner extends downward from the inner surface ρ) of the outer wall beyond its upper end surface along the outer circumferential surface. It is folded back so that it extends.

This liner lip is folded downward and the yc h minute is the tip or the outer 8tll bell body. It is buried within the outer circumferential surface of the outer wall so that it is pulled out and retained by the formed fat. ing.

This structure prevents the litchi ribs from peeling off from the wall ρ). In addition, when the liner is a multi-layered material, it is necessary to prevent the parrots from peeling off separately. Can be done.

Multi-walled containers made by Unknown manufacture a preformed liner on a stone mold, and then spray this. l: Placed in the tJ bottom mold.

Each step ρ1 of jetting molten resin material onto this liner to form the outer wall of the container It can also be formed by extrusion molding. To this factory, to the factory and others, the sword was blind. The finished liner is then blow-molded to form a kite in the final shape of Tanibai with 7# Shibusa Se. A second step may be added.

To manufacture such a container, a predetermined shape is used.

The preliminary tail-shaped liner is a wall of a cylindrical body having an annular lign extending outward from the opening ρ1. It has a certain charm. The lip may be at an angle of, for example, a leopard radius or open to the wall of the liner. A P:7-shaped groove is defined around the mouth. Preliminary during container injection molding process The molded liner lip allows the injected resin to enter the groove and form on the molding surface of the lip-on mold. After pressing, the shape of this molded surface is corrected. In this way, the container The rim part is wrapped in the liner to the desired shape, and the outer wall or the liner ring is wrapped around the liner. It will protect the tip of the shape. Brief description of the drawing The present invention will now be described in detail with reference to the illustrated embodiments.

FIG. 1 is a cross-sectional view of a multilayered resin container according to the present invention.

Figure 2 is a cross-sectional view of the container shown in Figure 1, taken from the curb side.

It shows an overlapping shape.

FIG. 3 is a cross-sectional view of the curb side of a typical conventional multi-walled resin container.

FIG. 4 is a cross-section of an inventive pre-shaped container used in the manufacture of the multi-walled container of FIG. It is a front view.

Figures 5 to 8 are cross-sectional views of the pressure box and female mold device of the thermoforming device. The shape of the cylindrical preformed liner shown in FIG. For the sake of simplicity, illustrations of other parts are omitted.

No. 9 is a cross-sectional view of the injection molding part of the jet-blown straight shape, and it is a cross-sectional view of the injection molding part of the jet-blown straight shape. The object is either a cast stone mold or an uninvented @ vessel, where the street grease for forming the outer wall is ejected. So, the matchmaker is worried about the death of the mold.

Fig. 10 is a cross-sectional view of a temporary injection molding part into which m fat for forming the outer wall of the container is injected. It is.

The first problem is the breakage of the injection molding part for injection molding the containers of other embodiments according to the present invention. FIG.

Detailed description of the invention Figure I was formed in accordance with the present invention. A cylindrical outer wall body or 12-page core - The outer wall 12 is made of #714 and the lower plate 16. There is. A dome-shaped portion 18 may be provided on the bottom plate 1b to increase strength. ■Wall 1 4 has a lumpy rim 26 that defines the opening of the container, with a diameter of 1"\ than the other 39 minutes. A total of 100 copies may be formed. As shown by the judgment - WA'h is not shown. An integrally molded soul i-shaped WA is installed so that it can cover 22 parts of Sekiguchi. - has. 7J'L,-Lon closing means include sticky type and snap type. , Talimp method, etc. (any method used in 2E rice can be adopted.

The inner liner has a thickness of approximately 0.002 inches, for example, and installed inside the outer wall 12 having a thickness of 0.65 inch and less in other parts. I'm being kicked. The liner is cut into the inner surface of the outer wall 12 and is densely layered over the entire surface. It is preferable to Liner fat may be formed from a single layer of permeable material, but moisture and acid In terms of blocking properties against carbon dioxide and carbon dioxide gas, similar numbers with excellent π characteristics are used. It may be formed into a multilayered body using a plain chestnut.

As best seen in Figure 2, the liner feathers have an opening 34Y-M at the upper end of the seventh. It has an annular lip 32. The lip 32 extends from the side wall 14 of the outer wall. A leg portion 44 that covers the shaped mouth edge 26 and further extends downward to rest on the outer surface 42 of the side wall 14. I have. In this way, the lip 32.

A shape g is formed so as to wrap around all 26 annular edges of the outer wall body 12 and engage integrally therewith. 2- It is. Is the length of leg I about 0° 60 inches excessive, or is it increased somewhat? Even if there is one, the turret is constructed so that the lid fits together to close the opening 22. , the leg I of the linum ends above the ridge of the prefecture l, and the twisting force is applied to the opening and closing of the lid. It is best to avoid joining in the fight. In particular, M-Tx is one leg part 44. Embed it in the gJJ wall of the outer wall body 12 so that the tip surface is in contact with the shoulder 47. That's true. When the end face 48 is embedded in the resin constituting the side wall of the outer wall ν, this The outer surface of the leg of I! II Wall 14 The same plane as the four outer walls 42 may be made like a Nariko. stomach. Also, the first leg portion I is formed apart from the upper end of the exit edge 26 so that the first leg portion I is not oily on the side wall 14. It may extend into the stepped portion at a position downwardly away from the edge station ρ).

As shown in FIG. When compared with a typical conventional resin container that does not have a plastic container, the present invention as described above The container has many advantages. First, the lip 32 covers all 26 edges of the outer wall. Wrap the liner 28 in the However, if you get better at using containers, you can resist even difficult forces. Furthermore.

This structure, which wraps around the entire circumference without any gaps, prevents cracks from forming at the top edge of the container. This prevents debris from entering the cracks while loading and unloading items into the container. This can prevent the user from entering the vehicle. Furthermore, the end face 48 of the liner is connected to the rim of the outer wall 14. Since it is in white contact with the wood and is protected by this, the entire linea feather, even if it is multi-layered, It is extremely unlikely that each layer will start to peel off. in this way.

The inventive container overcomes the drawbacks of conventional liner lip structures and their associated This method effectively overcomes problems such as liner delamination near the rim of the container. I can do it.

Manufacture of liners and containers The containers of the present invention are disclosed in U.S. Pat. Conventional thermoforming as described in No. 4.309.3130 respectively? call Using a jet blow molding device, with some modifications that will be made clear in the explanation below. can be manufactured. Before explaining how to manufacture preformed liners, As shown in FIG. It is mentioned that the shape of the lip wing is different from that of the finished product as shown in Figure 1 in Figure 2. Ku.

In Section 4, a preformed liner 62 for manufacturing containers of the present invention is shown. There is. The liner 62 has a middle wall 66 defining an opening and a bottom plate 67. It has 964 walls consisting of. The wall elbow extends outwardly through the opening 68 and It constitutes a shaped lip 70. The lip 70 is placed between the side and the upper end of the lip 65, It defines 72 grooves.

To form a preformed liner of the desired shape as described above, one American It is detailed in No. 4.162.883 and is also mentioned in the main residence. For conventional thermoforming equipment I can be there. Figure 5 shows thermoforming equipment.

It illustrates the parts necessary for understanding the method of forming the preformed liner 62, and in particular the liner 62. A new punch 74 for forming a lip 70 of a desired shape on the inner 62; A corresponding embossing device 76 is shown. Reference numeral 82 denotes a not-shown part of the thermal bottom type device 180. The male former is supported by a lower support plate from which it can be extended in the axial direction. ing. This male molding machine 82 is a conical male molding member or a molding bottle 8. It includes one cylindrical base member 84 that supports six members.

The rectangular former 82 is also used. Works with shoulder D9u to fix 86 molded bottles in place. It includes an annular punch 74 that forms a block-shaped step 94. The punch 74 is for bolts etc. One is fixed to the member 8 by suitable means. On Bunch 74.

In cooperation with the corresponding tapered tip 98 of the embossing tool 76, the desired shape is formed as described below. Form a lipke. An annular tapered surface 96 is integrally formed.

The fifth worst thermoforming device is a suitable one (not shown) such as a radiant heater or an infrared lamp. heated to a formable form. A sheet-shaped raw material t of thermoplastic resin is placed.

It includes a feed mechanism 102 for conveying. Coaxial with the rectangular former 82 The pressurizing box device lOO that operates is provided on the reaction side of the sea (104).

The pressurizing box 100 is made by framing a part of the liner sheet material 104 in the shape of a disc. Stretching the liner appropriately, forming the lip of the liner, and then forming the liner sheet. Cutting out reinakes formed from wood is done separately.

For these operations, the pressurized box machine I00 is installed on the plate tos flr. The plate 108 includes a circular frame 106 with a slit. The arm is connected to a means (not shown) for moving the arm forward and backward in the l-axis direction. 'Ey, :.

Cylindrical member 1 provided for cutting the formed liner from the liner sheet material 10 and the die 112 taken by it are also made movable forward and backward by appropriate means. ing. A mold presser 76 is disposed within the die 112 and presses the male molder 82 to press the mold. It is similarly connected to the Lth means for moving it forward and backward.

In operation, first, the frame 106 is moved forward toward the surface of the sheet material 104. (Advance, see) 104Y Oshicho.

The deformed portion of the framed sheet 102 is stretched appropriately by the frame 106, As the forming bottle 86 advances toward the pressurized boxer 100, the forming bottle 86 molded by. FIG. 6 shows a frame member 106 framed with the molded bottle 8b. There were 8 cases where there was no indication of the situation when engaging with the teacher.

The framing frame member 106 is toothed to the surface 116 of the diamond 4 by rotating the sheet to 4i. are doing. Then, the shell 104 is deformed into a shape that matches the outer shape of the molded bottle 86. It will be done.

Next, as shown in FIG. 7, the embossing device 76 having the embossing end 98 moves forward and the bunch 7 4 to form the lip 70 of the preformed liner.

During the formation of the lip 70, the die 112 moves forward against the sheared surface 118 of the bunch 74; The pre-excitation formed liner 62 is separated from the resin sheet material 104. Then, the male molder 82 and the pressurized box machine 100 are respectively retreated to their original devices, and the second inlet 62 is molded. The bottle 86ρ) is removed. Once the preformed liner is completed, it will A jet of the type described in U.S. Pat. No. 4,309,380 mentioned above. A molder or a jet blow molder is used. To summarize, this molding machine is a rotary set with several on each side of a rectangular indexing platen or turret. This platen or turret is rotated between four different working parts. It is something that can be done. In the first work, Toto.

A preformed liner is cast onto the stone mold, and vacuum is drawn through the ventral hole. This will keep it in place. In the second working section, there is a mold for injection molding. Raina and N were surrounded by each other as they went to sleep. Here, we will introduce the method for unmolding the outer wall of the container. The bath sanitizing material is squirted onto the outer surface of the liner. The third soft part has a blow molding mold. The liner is arranged so as to surround the abdomen, and the outer surface is sprayed with resin. A compressed thrust is sent inside around the abdomen of the heart. The total pressure of the liner 173m is on the outer surface. The resin is inflated from the inside of the liner wall where it is sprayed.

Obtain the final shape of the container body. In the fourth work, Toto, the container is ejected from the stone mold, and the stone The mold is then indexed to the first position and the process is repeated.

In terms of non-invention, the injection IjJ modification is particularly important. FIG. 9 shows the injection molding section 120. is shown, which includes a cavity 124, a mold (3) 126, and a mold 122 for chemistry. is popular. The molding surface 126 includes a lip molding surface 127 and a sidewall molding surface 129. I'm reading. A core i 128 on which a liner 62 is fabricated is disposed within the cavity 124. ing. The lip 70 of the liner extends from the stone-shaped outer surface (25) in a V-shape and ejects. It defines an annular groove for the resin to enter.

The mold 122 has a hole 132'2 at 1, through which a nozzle 134k is inserted to open the cavity. 124 so as to eject fallen bottles so as to surround the liner 62. melting The resin is inside the cavity 124! When Jtltl is done, the arrow turns around the lip 70 of the liner. While proceeding in the direction marked, the gap 136 between the liner 62 and the forming surface 126 is filled. Ku. When the narrow-faced welded material 138 reaches the groove 72, it will now have a V-shape or a knob. Miyako 70 has rim forming surfaces 127 and 111! It can be corrected according to the shape of the formation, and its cycle A patient-shaped lip as shown in Figure 10 or Figure 2 is prayed for. scheduled To ensure straightening, one corner of the lip 70 and the side wall of the liner should be drilled. I found that it is best to keep it around 60', especially around 30". However, the outer wall of the container Depending on the thickness of the body and the length of the liner leg 44 on this wall, other This is also possible with adult chickens.

When the lip 70 of the liner or the lip L38 of the liner is press-fitted, the liner is pressed downward. Since the tip lake 48 of Na is active after being in close contact with the fltllW forming surface 129 of the mold, The resin 138 is prevented from protruding outside the gap 72 after the lip 70 of the liner. Ru. To facilitate straightening of the lip 70 of the liner.

A hole 140 is provided in the mold 122 for exhausting the air in the space 142, and a lip is formed. The formation of the hanging cliff shape may not be hindered. ρ) , the volume of Nitoma 142 is If it is not very large, the tip 48 of the air T-liner and the molding surface 1 of the mold. It is also possible to make the relief 1 upward from 29 spaces.

In this case, there is no need to provide the hole 140.

After the ejection of the resin 138 is completed, the mold 122 is attached to the stone mold 128 and the thin lined line. Removed from Na&'s circle.

The stone mold is indexed to the blow molding section where the mold is blow molded into the desired shape as described above. will be removed. Needless to say.

As mentioned above, the container of the present invention is formed by omitting the blow molding and only using the jet F7y shape. It's okay.

The invention has been described based on several implementations.

These are already in line and it is also possible to implement the invention in different rapid stocks.

For example, instead of the outer wall, the inner wall Tt can be provided on the outer surface of the liner container. Wear. Even in such a container, the liner is formed by a lip embedded in the inner wall.

Make sure to wrap around the rim of the container. By the way, the container has lychees on the outside and walls on the inside. The cross-sectional view of the left side of the mouth rim is the right side of the mouth rim of the above-mentioned example in which the inside is the liner and the outside is the wall. The side cross section is the same as in Figure 2.

FIG. 11 shows that a somewhat different container can be formed. Different: Piit It is shown in the i forming part 150. This forming part 150 has a female molding die 152 and a male molding die 152. Includes mold 154.

A gap 156 is provided between these. Along the inner surface 150 of the female mold 152 A preformed liner 160 is located at this separation ff1y! - Through the bar Closely adhere to the female mold 152 and 158 by a majority of methods such as sucking air with a vacuum. can be held as such.

The liner 160 has an annular lip 162 extending inwardly, rather than outwardly, from its opening. It's different in that it has a k stomach, but the rest is in the lol Ni column mentioned above? It's the same as Raina be.

As shown in FIG. 11, the male mold 154'! 'The female mold is 152 yen, and the center of the seven is in the opposite direction. through the nozzle 164 installed in the hole 166 of the male mold 154. The thermoplastic resin ya-gushes out. For thermoplastic resin, proceed in the direction shown by the arrow in Figure 11. Look, male mold 154. Fill the gap 156 between the liners 160 and form the inner wall. . Similarly to the description of the previous implementation row, the injected resin is applied to the lip 162 of the liner. Turn the lip forming surface 1613K of the female mold 152 and press it downward to form the lip L62. , K as shown in the second factor and as mentioned above.

Correct it into a predetermined hanging shape. Liner with injection-injected resin 160 is taken out from the male molding section 150 and then sent to the blow molding section, as described above. The container Z may also be expanded by blow molding.

Engraving (no changes to the content) Figure 1 Procedural amendment 1 Incident display m11j, t51ma No. PCT/US831015043, supplementary person who corrects Relationship to the incident: Patent applicant address Name: National Can Corporation 4 Agent: 105 Address: Shiba 3-chome Building, 3-2-14 Shiba, Minato-ku, Tokyo International Investigation Report

Claims (1)

[Claims] 1. In a cylindrical multi-layered walled container with narrow walls, the first step is to make a bamboo container. No. This first layer ends at the opening, and the upper end surface extends through the opening. The annular opening that defines the opening has a large diameter, and the upper Wee2 extrusion wraps around the upper end surface of the mouth rim. and the annular tip of the second dove is at least partially buried within the first layer. . 1st. A container in which separation of both second layers is prevented at the upper end surface. 2. The second layer constitutes the inner side of the container, and the first layer constitutes the outer layer of the container. consists of A container according to claim 1. 3. The first layer has an annular step near the upper end surface of the mouth edge, and this step has the above-mentioned The annular tip of the second layer is fitted therein. A container according to claim 2. 4. The stepped portion is provided without a shoulder portion of the first layer and is spaced apart from the mouth edge. Then, the lumpy tip 14 of the second layer comes into contact with this shoulder, causing the first layer to come into contact with the shoulder. Withdrawal from the second layer It can be further prevented and contained. A container according to claim 3. 5. The stepped portion is cast away from the upper end surface of the mouth edge. Claims The container described in box 4. 6. Twist the upper end surface of the second layer or the mouth edge and further along the outer surface of the upper IIC first layer. It has a portion extending downward. The outer surface of this downwardly extending portion is flush with the outer surface of the first layer. @ device according to claim 2 or 3. 7. The container is shaped by injection molding, at least in part of the handle material. Being The first office is now configured, and this I! The pattern surface to be 1itIjj is It is sprayed onto the surface of the second layer. IP! fClaims 1 or 2 Containers listed in section. 8. The second layer is a wide liner made of a resin material with barrier properties; 1% permissible column where the first layer is different from the container's body and body. @ vessel. 9. Open the container! ! 1. To produce a multi-walled container with a rounded edge. A deformable resin pre-formed cylindrical liner used, the surface of this liner being At least a portion of the resin material is jetted into the bath melt to form a jet molding. The δ-shaped narrow surface material and the upper Rc layer each form a multilayer wall of the container. , the liner is connected to tg= at one end and tg= at the other end. stomach The 8-ring opening opens at It has a tip lip. Pre*a-shaped cylindrical liner. 10. The above angle is set in the range of fJ2L1 degree to 60 degrees. patent request The liner according to claim 9. 11. The above angle is approximately in degrees. A liner according to claim 9. 12. The molten resin spouted from the above opening and the wall near the lip is The container is wrapped in a liner with a rim that defines the opening of the container. It is formed in such a way that it forms. A liner according to claim 9. 13. The liner constitutes the inner side #V of the multilayer wall container. The injection molded resin constitutes an outer layer. Claim No. 9. ! jl to the liner described in item 12. 14. At least a portion is formed by injection molding and has an opening defining an opening. a first layer, and a ring-shaped ring provided in contact with the first layer and enclosing the first layer. A preformed cylindrical line for fabricating a multi-I-walled container comprising a second layer having a A manufacturing method. At the same time as the thermoforming, a thermoplastic sensin sheet was stretched. It is then heated to form a rhombic shape. - Move forward by pushing up the surface of the stretched sheet above to make the outer shape of the molded bottle. A part of this sheet is transformed into the outer shape of a vlffl-shaped bottle, and a 2-in-a 9jlf Form f, bottom plate and t. An annular line with an acute angle extending integrally from the side wall of the liner and between the liner and the side wall. A chirpy shaped insect. The above liner is trimmed with the above light rib KG on the above sheet. +jJ1% from the start. The liner 1 is removed from the molded bottle by 1' process. Preformed tubular la Ina production method. 15 What is the above angle? fJa is 1 degree or closed. 814 items of range of ox W + Kozue search How to put it on. 16. The lip extends outwardly from the side wall. Claim Q) The method according to claim 14. 17. The above-mentioned lip is connected to a pressing tool and a corresponding bunch from both sides of the above-mentioned sheet. 7 are formed by pressing them together. Claims 14 to 14 The method according to paragraph 16. 18. Preparation manufactured by the method described in Items 14 to 16 Prepared liner. 19, 1st. 2 layers of silk have 1 layer = 1 = wall tightening That's it. The outer surface of the screw has an opening defining an audience, and the ring extends in a circular manner around the island of the tenth opening. A molded thermoplastic street grease having a lip defining a groove at an acute angle to the wall. A cylindrical first layer wall is formed. The first layer wall and molding surface are tilted so that there is a gap remaining between them in the injection molding cavity. and arranged. In order to form the second bird wall, a molten resin material is injected into the gap, and this injection By infiltrating the resin into the groove of the first layer wall, the shape of the lip is changed. Correct it. Above 1. The second positive wall is taken out from the molding cavity, and the multilayer wall tree consists of each process. Fat container manufacturing method. The ribs and the first layer wall constitute an inner wall of the multilayer wall container. The injected resin material constitutes the outer wall. The method described in Sushi Motoki Scope No. 1981. 21. The jetted resin material has a ring-shaped R part that defines an opening. A two-layer wall is constructed, and the rimming of the first layer wall is suppressed and corrected, and the mouth edge portion is corrected. It is made of K so that it is wrapped in a lip. A method according to claim 20. ρ, the resin to be injected is I! on the outer surface of the second layer wall. To release Jt It consists of Method according to claim 21〇 Illusion, said outer first layer wall or barrier liner, said second /i! The wall is up gL; It becomes a supporting wall for the ina. A method according to claim ρ. By correcting the lip, this lip wraps around the rim of the second layer wall. Forms a container χ. A method according to claims 19 through 19. 5. The lip σ) is corrected so that this lip wraps around the mouth edge 7 of the second layer wall. , and the tip of this lip is embedded within the second layer wall. Claim 1 The method described in Items 9 to A. 26, the above lip has a portion extending downward from the rim; It has a surface in contact with the second layer wall and a surface opposite thereto, and this opposite surface is the same as the second layer wall. It is formed like a surface. A method according to claims 19 to 23. n, manufactured by the method described in claims 19 to 26. Many Layer wall container.