JP3939667B2 - Aluminum alloy container with bonding structure and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the manufacture of containers used for various electronic devices, automobile parts, daily necessities, and the like. More specifically, the present invention relates to an aluminum alloy container that is integrally formed by bonding two or more parts and a method for manufacturing the same.
[0002]
[Prior art]
Many containers are built into Sunday goods and automobile parts. In these containers, for example containers such as cans, if the mouth is smaller in diameter than the body part, or if it becomes a large non-cylindrical part, there is a limit to pressing, so subdividing into multiple parts and pressing The resulting product is abutted and integrated into a container. This adhesion is performed by welding, brazing or the like. Further, the inside may be joined by an adhesive such as a fluorine resin film.
[0003]
For example, the inner surface of a can body made of stainless steel is coated with a highly chemical-resistant fluororesin, and when joining the subdivided parts, this fluororesin is melt-filled and joined to the welded part of the metal body, A technique in which a metal body and a synthetic resin are integrated by adhesion is disclosed (see Patent Document 2). Further, in a metal sealed container for joining a plurality of parts, a form in which metals are bonded together with a synthetic resin, and a technique for integrating the synthetic resin into a metal body by insert molding are disclosed (see Patent Document 1). ). As described above, a technique for bonding and integrating a metal body and a synthetic resin in a container is known.
[0004]
In particular, as a method of joining a plurality of parts in an aluminum container, brazing is generally used, but this brazing is performed by placing an assembled aluminum alloy structure in a heating furnace and brazing the whole. It is the method of joining by heating above the melting temperature. Recently, a method of joining and forming by other methods besides brazing has been proposed.
[0005]
For example, two aluminum alloy plates are bonded together and pressure-bonded, and the inner portion is expanded in a later process to create a space, or a portion corresponding to the inner space is formed in advance on an aluminum alloy plate. There are known a method of bonding and pressure bonding, or a method of bonding using an adhesive in addition to the pressure bonding.
[0006]
[Patent Document 1]
JP-A-5-85543
[Patent Document 2]
JP 2000-334837 A
[0007]
[Problems to be solved by the invention]
As described above, various methods for manufacturing a container have been proposed, but problems have also arisen. In particular, the brazing method is a method that has been generally performed. However, when the container becomes large and complicated, the manufacturing method is not efficient at present and the cost is high. This is not an efficient method for mass production. As a method other than brazing, there is an adhesive method using a synthetic resin as described above. However, there is no certainty in the adhesive method, and the application is limited. In general, it is often applied to a portion where a direct force is not applied.
[0008]
Also, in the example of the above-mentioned patent document, a method by insert molding is exemplified in part, but the object is an aerosol part or the like and is not applied to a portion to which a large force is applied. Furthermore, in the crimping method, etc., there is a restriction that environmental conditions need to be maintained, for example, it must be performed in a non-oxidizing atmosphere in a vacuum or inert gas because the pressure is applied while heating, and the equipment is inevitably expensive. Become.
[0009]
However, rational joining methods that do not use an adhesive and are not welded have been studied, but are still effective and not stable. Integrate high-strength engineering resin without intervention of adhesive to iron alloys such as magnesium, light metals such as aluminum and its alloys, stainless steel, for example, by injection of resin components on the metal side The method of bonding (abbreviated as “injection bonding method”) is a stable technique in which a metal mating surface is brought into close contact and is not likely to be peeled off, but has not been put into practical use at present.
[0010]
The inventors of the present invention have made extensive research and development, and after immersing a metal shaped article in an aqueous solution of ammonia, hydrazine, or a water-soluble amine compound, heat containing polybutylene terephthalate resin (hereinafter referred to as “PBT”) as a main component. It has been found that the adhesive strength is specifically increased when the plastic resin composition is brought into contact with normal injection molding temperature and injection molding pressure.
[0011]
Conventionally, it has been known that metal products are made by insert molding of metal products to make composite products of metal and resin. However, these conventional composite manufacturing methods are methods for manufacturing electrical contacts, aluminum foil, and the like, and can be applied to mechanical structures that require strong adhesive strength (adhesion amount) and rigidity. It is not a thing. The inventors of the present invention have further studied by paying attention to whether the same thing can occur with other resins. When the aluminum alloy immersed in an aqueous solution of ammonia, hydrazine, or a water-soluble amine compound in the proposed invention is observed with an electron microscope, a fine recess having a diameter of 30 to 300 nm is formed, and X-ray electron spectroscopy ( When observed with X-ray photoelectron spectroscopy, a large amount of nitrogen atoms are observed.
[0012]
These indicate that the surface of the aluminum alloy is etched extremely finely, and further, nitrogen compounds derived from ammonia, hydrazine, or water-soluble amine compounds are present on the surface. The inventors' presumption is that ammonia, hydrazine, or a water-soluble amine compound is chemisorbed on an aluminum atom. If an exothermic reaction occurs when the thermoplastic resin composition comes into contact with these chemisorbents, it can penetrate into fine recesses formed on the aluminum surface without rapidly cooling and solidifying.
[0013]
PBT is an aggregate of carboxylic acid esters, and it has been found that carboxylic acid esters undergo an exothermic reaction with amine compounds to become carboxylic acid amides and alcohols, indicating that this estimation is valid. Accordingly, other polymers that can cause an exothermic reaction with ammonia, hydrazine, and amine compounds were considered. One is polyphenylene sulfide resin (hereinafter referred to as “PPS”).
[0014]
This resin is an engineering plastic developed by Philippe Spectrolium, Inc. of the United States, and is made from a polycondensation reaction of p-dichlorobenzene, sodium hydrogen sulfide, and caustic soda. The composition of this PPS includes not only polyphenylene sulfide having a high molecular weight but also 3 to 10% of low-molecular-weight oligomers having several, a dozen, or several tens of phenylene groups.
[0015]
Moreover, many of these oligomers and polymers have a molecular terminal of chlorine. The present inventors presumed that this chlorine terminal would react with basic amines while generating heat at high temperature to form a salt. As a result of the experiment, it was found that PPS was injection-bonded with respect to an aluminum alloy treated in the same manner. Although a follow-up test is necessary for the correctness of the inference, it is a good guideline for the idea of horizontal development of the present invention.
[0016]
On the other hand, particularly aluminum alloy containers as metal products are manufactured by the above-described manufacturing method, and have problems in the bonding method or problems in cost, and the present situation is not always satisfactory. This container may be a safety-related part, and especially the joint relationship must be reliable.
[0017]
The present invention has been made based on the technical background as described above, and achieves the following object.
An object of the present invention is to obtain an aluminum alloy container having a bonding configuration in which a thermoplastic resin composition and an aluminum alloy are bonded to each other by treating the surface of the aluminum alloy and a method for producing the same.
Another object of the present invention is to obtain an aluminum alloy container and a method for manufacturing the same, which are not limited to the shape, and have an adhesive structure that has no problem in terms of structure and mechanical strength.
Still another object of the present invention is to obtain an aluminum alloy container having a simple configuration, suitable for mass production, and capable of being manufactured at low cost, and a method for manufacturing the same.
[0018]
[Means for Solving the Problems]
  The present invention adopts the following means in order to achieve the object.
  The aluminum alloy container according to the bonding configuration of the present invention is:
  A first container member formed by pressing an aluminum alloy plate;
  A second container member formed by pressing an aluminum alloy plate;
  A butt-joined container,
  Providing a first bonding portion having a bonding space at an edge of the first container member;
  Providing a second bonding portion having a bonding space at an edge of the second container member;
  The first adhesive part and the second adhesive part are faced to face each other, and the butted first adhesive part and the second adhesive part include a polybutylene terephthalate resin or a polyphenylene sulfide resin as a component. Injection compositionMoldingLet the first container part and the second container member be integrated to form a container
An aluminum alloy container,
  The first adhesive part and the second adhesive part are for improving the adhesiveness of the thermoplastic resin composition.3-10% hydrationHydrazine40-50 ° CIn aqueous solutionSeveral minutesIt is characterized by being treated to be immersed.
[0019]
  Moreover, the thermoplastic resin composition may be added with a fiber filler and / or a powder type filler for improving mechanical properties.
  Further, the fiber filler is at least one selected from glass fiber, carbon fiber, and aramid fiber, and the powder type filler is selected from calcium carbonate, magnesium carbonate, silica, talc, glass, and clay. It is good that it is one or more.
[0020]
  The method of manufacturing an aluminum alloy container according to the bonding configuration of the present invention
  A first pressing step of placing the aluminum alloy plate on a press die and forming the first container member by pressing so that a first bonding portion having an adhesion space is provided at an edge of the aluminum alloy plate;
  A second pressing step of placing the aluminum alloy plate on a press die and forming a second container member by pressing so that a second bonding portion having a bonding space is provided at an edge of the aluminum alloy plate;
  The first adhesive portion and the second adhesive portion are3-10% hydrationHydrazine40-50 ° CIn aqueous solutionSeveral minutesA dipping process for dipping,
  A bonding step of facing and abutting the first adhesive portion and the second adhesive portion; and
  A thermoplastic resin composition containing a polybutylene terephthalate resin or a polyphenylene sulfide resin as a component is injected into the abutted first adhesive portion and the second adhesive portion.MoldingAnd an integration step of integrating the first container member and the second container member.
[0021]
Further, the thermoplastic resin composition is characterized in that a fiber filler and / or a powder type filler for improving mechanical properties are added. Furthermore, a pretreatment step of immersing the first adhesive portion and the second adhesive portion in a basic aqueous solution and / or an acid aqueous solution is performed before the immersion step.
The above-described aluminum alloy container of the present invention and its manufacturing method will be described in detail below.
[0022]
[Aluminum alloy panel]
As an aluminum alloy used as a material for the container member, 1000-7000 series products standardized by Japanese Industrial Standards (JIS) and various aluminum alloys for die casting can be used. The 1000 series is a high-purity aluminum alloy, but the others are alloy systems for various purposes including magnesium, silicon, copper, manganese and others in addition to aluminum. This surface pretreatment step is preferably a pretreatment method / treatment method II described later for an alloy type that contains a relatively large amount of metals other than aluminum. However, this pretreatment step is not necessarily required. Absent.
[0023]
In any case, not only a high-purity aluminum alloy but also many aluminum alloys that are currently used in housings of various devices can be used. The base of the container is manufactured by press molding. As a container, this press-molded product and a plate-shaped product, or a product molded by hand, etc. are combined and sealed. Resin is poured into the seam to perform adhesion.
[0024]
When the resin is bonded, a thermoplastic resin composition containing a resin, that is, a polybutylene terephthalate resin or a polyphenylene sulfide resin as a component, is extracted by injection molding into a pressed portion of the aluminum alloy pressed as described above. This aluminum alloy needs to have no thick film such as rust that is oxidized or hydroxylated on the surface to be bonded, and those that have obvious rust on the surface after long-term natural standing should be polished and removed. is required.
[0025]
(I) Surface processing
Surface treatment that removes coating layers such as rust on the surface by sandblasting, shot blasting, grinding, barreling, etc. immediately before the pretreatment step using an aqueous solution described below, although it may also serve as polishing. It is preferable to carry out. The surface to be bonded (fixed) to the thermoplastic resin composition to be described later is roughened by these surface treatments, that is, the surface roughness is increased, and the adhesion effect between this surface and the thermoplastic resin composition can be enhanced. preferable.
[0026]
In addition, this surface processing is performed by removing the oil layer on the surface remaining in the metal processing step such as pressing, and the oxide layer generated on the surface during storage and storage as a container member of the aluminum alloy after the press processing. It has an important role of removing the corrosive layer and renewing the aluminum alloy surface. This is effective in causing the next step treatment to act uniformly over the updated surface. In addition, according to the experiments by the present inventors, the surface condition of the aluminum alloy container member subjected to the blast treatment is greatly different from that treated in the next process on the same day if stored for about one week in dry air. Confirmed that there is no.
[0027]
(Ii) Cleaning process
This cleaning step is not necessarily a necessary step in the present invention because the surface processing described above is performed. However, oils and fats, fine dust, paint, and the like are attached to the surface of the aluminum alloy container member. In particular, the surface immediately after the press working is attached with deposits during the press working, and it is preferable to wash these.
[0028]
Depending on the type of dirt, it is preferable to wash with water after removing the dirt by a method such as washing with a commercially available aluminum degreasing detergent or dipping in a water-soluble organic solvent. Examples of the water-soluble organic solvent include acetone, methanol, ethanol, and the like. If the oily substance is strongly attached, it is preferable to put a step of washing with an organic solvent such as kerosene, benzine or xylene before that.
Keep the storage period after washing with water as short as possible. If possible, it is preferable that the cleaning process and the following process (pretreatment process) are continuously performed without taking time. In the case of continuous treatment, it is not necessary to dry after the washing step.
[0029]
[Pretreatment process]
When pretreatment step I described below is performed as pretreatment for the treatment step described later, adhesion between the aluminum alloy container member and the thermoplastic resin composition is more effective. In particular, it is effective for aluminum alloys other than 1000 series aluminum alloy (pure aluminum alloy type). In short, the purpose of this step is to process the aluminum alloy obtained in the previous step in advance so that the effect in the next essential step is sufficiently obtained.
[0030]
This is a pretreatment for forming a fine etched surface on the aluminum alloy surface. The aluminum alloy container member is first immersed in a basic aqueous solution (pH> 7), and then the aluminum alloy panel is washed with water. Bases used in basic aqueous solutions include hydroxides of alkali metal hydroxides such as sodium hydroxide (NaOH) and hydroxide (KOH), or soda ash (Na₂CO_Three, Anhydrous sodium carbonate), ammonia and the like.
[0031]
In addition, alkaline earth metal hydroxides (Ca, Sr, Ba, Ra) can be used, but they may be selected from the former group which is practically inexpensive and effective. In the case of using sodium hydroxide, an aqueous solution having a concentration of 0.1 to several percent, and in the case of using soda ash, 0.1 to several percent is preferable, and the immersion time is room temperature or slightly higher, for example, 20 to 50 ° C. for several tens of seconds. Immerse for a few minutes to melt and renew the surface of the aluminum alloy. By dipping in a basic aqueous solution, the surface of the aluminum alloy dissolves as aluminate ions while releasing hydrogen, and the surface of the aluminum alloy is scraped and a new surface appears. After this immersion treatment, it is washed with water.
[0032]
As pre-treatment other than alkali etching, there is acid etching, which is performed at an ordinary temperature or a slightly higher temperature, for example, 20 to 50 ° C., in an aqueous solution such as hydrochloric acid, nitric acid, sulfuric acid, hydrofluoric acid, etc. It is immersed for several tens of seconds to several minutes, and also serves to melt and renew the aluminum alloy surface.
In addition, the above-described alkali etching is performed by washing with water, and the above acid etching is performed by washing with water. Furthermore, the acid etching is performed by washing with water, the alkali etching is performed by washing with water, the acid etching is performed by washing with water, and the like. It can be applied by taking a more complex method.
[0033]
In short, since these pretreatments are heterogeneous reactions involving three phases of gas (hydrogen gas generated) in a solid (aluminum alloy) and liquid (aqueous solution), the composition and structure of the input aluminum alloy In particular, it is necessary to find a method that is considered to be a very complicated reaction governed by the composition and structure of a fine part, and that produces a result as stable as possible through trial and error.
[0034]
[Processing process]
This processing step is an essential processing step when the present invention is applied to an aluminum alloy. In this step, the aluminum alloy is immersed in an aqueous solution of ammonia, hydrazine and / or a water-soluble amine compound. The purpose of this step is to slightly invade the surface of the aluminum alloy to produce fine irregularities and to adsorb these nitrogen-containing compounds.
[0035]
Examples of the water-soluble amine compound include methylamine (CH_ThreeNH₂), Dimethylamine ((CH_Three)₂NH), trimethylamine ((CH_Three)_ThreeN), ethylamine (C₂H_FiveNH₂), Diethylamine ((C₂H_Five)₂NH), triethylamine ((C₂H_Five)_ThreeN), ethylenediamine (H₂NCH₂CH₂NH₂), Ethanolamine (monoethanolamine (HOCH₂CH₂NH₂), Allylamine (CH₂CHCH₂NH₂), Diethanolamine ((HOCH₂CH₂)₂NH), aniline (C₆H₇N), triethanolamine ((HOCH₂CH₂)_ThreeN) and the like are preferable.
[0036]
As a method that does not have a bad odor and is easy to handle, there is a method in which a 3 to 10% hydrazine monohydrate aqueous solution is set to 40 to 50 ° C., an aluminum alloy is immersed for several minutes and washed with water. A similar effect can also be obtained by immersing in an aqueous ammonia solution at 15 to 25 ° C. in a concentration of 15 to 25% for 10 to 30 minutes and washing with water, but the odor is severe. Even when other water-soluble amines are used, it is necessary to search the temperature, concentration, and immersion time by trial and error. In any case, since the odor is severe, an hydrazine aqueous solution is preferable in view of its low odor.
[0037]
[Storage of pre-treated aluminum alloy panels]
The aluminum alloy washed with water in the previous step is preferably forcedly dried with air at a relatively low temperature of about room temperature to 80 ° C. The aluminum alloy container member is stored under dry air. This storage time is better as short as possible, but there is no practical problem as long as it is within one week at room temperature.
[0038]
[Thermoplastic resin composition]
The thermoplastic resin composition used in the present invention is described below. The main component of the thermoplastic resin composition that integrally adheres to the surface of the aluminum alloy container member is preferably a polybutylene terephthalate resin (hereinafter referred to as “PBT”) or a polyphenylene sulfide resin (hereinafter referred to as [PPS]). It is necessary to match the expansion coefficient with the aluminum alloy.
[0039]
Further, the inclusion of the filler is very important from the viewpoint of matching the linear expansion coefficients of the aluminum alloy container member and the thermoplastic resin composition. As the filler, glass fiber, carbon fiber, aramid fiber, and other high-strength fibers similar to these are first required. However, the fiber filler alone has a strong direction during injection molding and does not work well depending on the shape. Therefore, calcium carbonate, magnesium carbonate, silica, talc, glass, clay, pulverized carbon fiber and aramid fiber, and other kinds of resin-filled inorganic fillers are preferable.
[0040]
Furthermore, in many cases, injection molding is used from the viewpoints of ensuring and strengthening the adhesion, and from the viewpoint of productivity, cost, etc. In this case, the molding shrinkage rate is also important. In conclusion, it is preferable that the molding shrinkage is small. Therefore, there is a method in which an amorphous polymer is included in PBT or PPS rather than PBT or PPS alone, which originally has a large molding shrinkage. Specifically, polycarbonate resin (hereinafter referred to as [PC]), ABS resin (hereinafter referred to as “ABS”), polyethylene terephthalate resin (hereinafter referred to as “PET”), polystyrene resin (hereinafter referred to as “PS”). Can be contained.
[0041]
Finally, the linear expansion coefficient of the aluminum alloy is 2.2 to 5 × 10^-Five℃^-1Therefore, the average vertical and horizontal linear expansion coefficient of the thermoplastic resin composition (the linear expansion coefficient in the method in which the fibers of the resin composition are mainly arranged is small, but the linear expansion coefficient in the perpendicular direction is large, 2 to 3 × 10)^-Five℃^-1Almost match, 2-4x10^-Five℃^-1Even so, it seems to be suitable for practical use. In addition, the molding shrinkage is preferably 0.4 to 0.5%.
[0042]
[Molding / Injection molding]
The most effective method of extracting the thermoplastic resin composition containing PPS on the surface of the aluminum alloy container member and integrating the two container members is an injection molding method from the viewpoint of productivity, ease of molding, and the like. is there. That is, an injection mold is prepared, the mold is opened, an aluminum alloy container member is inserted into one of the molds, the injection mold is closed, and the above-mentioned thermoplastic resin composition is added to the cavity corresponding to the joint portion of the joint. The injection mold is opened and the mold is released.
[0043]
Injection molding is the most excellent molding method such as freedom of shape and productivity. This molding may be incorporated into a press mold. In this case, it is possible to press the panel to be the base, and then align and join the counterpart container member and perform injection molding using the same press mold. In this case, pressing of the container member and injection molding of the thermoplastic resin composition can be performed with the same mold, which is extremely efficient.
[0044]
The injection molding conditions will be described. The mold temperature and the injection temperature can exhibit a sufficient adhesive effect under substantially the same conditions as in the normal injection molding using the thermoplastic resin composition. In order to increase the adhesive force (adhesive force), it is better to keep in mind that the pin gate is used as much as possible in the mold gate structure. In a pin gate, the resin temperature increases instantaneously due to shear friction generated when passing through the resin, and this often produces a good effect. In short, it has been observed that it is good to devise so that the high-temperature resin melt is in contact with the adhesive surface as much as possible within a range that does not hinder smooth molding.
[0045]
[Action]
According to the present invention, an aluminum alloy container member and a thermoplastic resin composition containing PBT or PPS can be firmly bonded by injection molding using an insert or the like. Practically, the thermoplastic resin composition is preferably a compound containing PBT or PPS, PBT or PPS containing a high concentration filler as a main component.
[0046]
The reason why this is possible is that the aluminum alloy was treated with an aqueous solution of ammonia, hydrazine and / or a water-soluble amine compound. By this treatment, the surface of the aluminum alloy is changed to the parent PBT or parent PPS surface. Further, in order to firmly attach the thermoplastic resin composition to various aluminum alloys, a method in which chemical etching by immersion treatment in a base / acid aqueous solution is added before the aqueous solution treatment can be used. By applying the present invention, a wide range of containers with various shapes can be handled. In particular, since PBT or PPS is inherently flame retardant, it is considered that a specific container can be made for use.
[0047]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 to 7 are diagrams showing an embodiment. The aluminum alloy container is obtained by joining and integrating two divided container members. The target container may be, for example, a septic tank, a container for storing chemicals, or an industrial product tank. Also, the use of oil transportation tanks, water supply tanks, gas tanks, liquid hydrogen tanks, bulk cement transportation tanks, nuclear reactor tanks, low temperature tanks and the like is not limited. The present invention is particularly useful for producing an aluminum alloy container that is free from leakage and the like because it has a certain adhesive property particularly at the bonded portion.
[0048]
FIG. 1 shows a state in which a first container member 2 which is one container member which is the original shape of the container 1 is molded. The first container member 2 is manufactured from an aluminum alloy plate 2a. The press mold is composed of a concave lower mold 3 that receives an aluminum alloy plate 2a, which is a placed first container member 2, by a press, and a convex upper mold 4 that presses the plate 2a. ing.
[0049]
When the plate 2a is pressed by a press operation of a press machine (not shown), the container body portion of the plate 2a is squeezed and molded along the shape of the lower mold 3. Moreover, the recessed part 5 (1st adhesion part which has the space for adhesion | attachment) is provided in the edge part of the 1st container member 2 of an adhesion part, and it shape | molds simultaneously with a press. This pressing operation is performed by heating the plate 2a or the lower mold 3 or repeating the pressing operation. Finally, the first container member 2 is molded as indicated by a two-dot chain line.
[0050]
FIG. 2 shows a molded state of the second container member 6 molded in the same manner as in FIG. In the same manner as in FIG. 1, the press mold is a concave lower mold 7 for receiving a pressed aluminum alloy plate 6a as the second container member 6 by pressing, and a convex upper mold for pressing the plate 6a. It consists of a mold 8. The second container member 6 indicated by a two-dot chain line in the figure is formed by pressing the plate 6a by a pressing operation of a press machine (not shown). A plurality of holes 9 (second adhesive portion having an adhesive space) are provided on the mating surface of the edge of the second container member 6. The hole 9 may be a recess, but may be a space where a thermoplastic resin composition to be described later is injected.
[0051]
Next, the first container member 2 and the second container member 6 are removed from the lower molds 3 and 7, respectively, and each of them is a mold for injection molding, that is, the lower mold 10 for the first container member and the second container. It mounts on the lower metal mold | die 11 for members. The configuration shown in FIG. 3 is abutted in this mounted state. When abutting, the first container member 2 and the second container member 6 face each other and the mating surfaces are in direct contact with each other. For the mating surfaces, it is necessary to subject the two container members to a surface treatment for improving adhesion, that is, a treatment of immersing in an aqueous solution composed of ammonia, hydrazine, a water-soluble amine compound, or the like, or a combination thereof. is there. This process is performed before injection molding. Further, it is preferable to immerse the recess 5 and the hole 9 in a basic aqueous solution or an acid aqueous solution before the immersion treatment.
[0052]
When the two container members are aligned, the position of the hole 9 of the second container member 6 coincides with the recess 5 of the first container member 2. The lower mold 11 of the second container member 6 is provided with a gate 12, and the gate 12 communicates with the hole 9 of the second container member 6. After the two lower molds 10 and 11 are brought into contact with each other, the thermoplastic resin composition 13 is injected from the gate 12 and filled in the entire recess 5 through the hole 9. In the lower mold 11 on the hole 9 side, a recess 14 is provided so as to coincide with the position of the gate 12.
[0053]
Accordingly, the thermoplastic resin composition 13 is evenly filled into the recesses 5 through the recesses 14 and the holes 9. This thermoplastic resin composition 13 is a thermoplastic resin composition 13 containing a polybutylene terephthalate resin (PBT) or a polyphenylene sulfide resin (PPS) as a component. In addition, the thermoplastic resin composition 13 is added with a fiber filler or a powder filler for improving mechanical properties, or both.
[0054]
The fiber filler is glass fiber, carbon fiber, aramid fiber, or the like, and may be a combination thereof. Furthermore, the powder type filler is calcium carbonate, magnesium carbonate, silica, talc, glass, clay and the like, and may be a combination thereof. When the thermoplastic resin composition 13 is solidified, the container member is taken out from the lower molds 3 and 7, and the two container members are integrated in a sealed state to form the container 1. The state of the completed container 1 is shown in the sectional view of FIG.
[0055]
FIG. 5 is a partial cross-sectional view showing a configuration according to another manufacturing method. In this case, it differs from the above-described embodiment in that the shape of the concave groove 15 is formed by slightly denting the hole 9 portion of the bonding portion of the second container member 6 over the entire circumference. As described above, the thermoplastic resin composition 13 injected from the gate 12 is led to the concave groove 15, the hole 9, and the concave portion 5, filled, and solidified, the first container member 2 and the second container member 6 are It is integrated into a container. In the case of this embodiment, only the first container member 2 side has a step on the bonding portion, and the second container member 6 side has a shape with no irregularities, which is a preferable shape in terms of design.
[0056]
FIG. 6 shows another example of the mold configuration. The injection molding is not performed over the entire surface of the container member, but is performed only on the bonding portion. Therefore, as shown in the drawing, it is possible to partially inject and bond only around the hole or recess. That is, the mold 16 for the first container member has a simple shape enough to suppress the bonded portion, and similarly, the mold 17 for the second container member is also made simple according to the mold 16. What is necessary is just to provide the gate 18 in the metal mold | die 17 for 2nd container members. Further, if the first container member 2 or the second container member 6 is likely to be deformed upon injection to the bonded portion, the support may be partially reinforced. By adopting such a configuration, the mold shape is simplified, so that the cost of the equipment can be reduced.
[0057]
FIG. 7 is a partial cross-sectional view of an embodiment applied to a cylindrical container or the like. This method is particularly suitable for large containers. When this method is applied, it is not necessary to enlarge the mold by dividing and bonding a large container. This is applied when the cylindrical container 19 is divided and can be bonded. The figure is a partial view showing a configuration in which an intermediate portion of the cylindrical container 19 is divided into pieces and bonded. The form shown in this figure is configured in accordance with FIG. 6 as a mold form having only an adhesive portion. The first container member 20 fits into the second container member 21 that is an intermediate member of the cylindrical container 19 to form a recess 22, and a hole 23 or a groove 24 is formed on the outside thereof. Yes. The mold 25 is configured as a support member that injects the thermoplastic resin composition to the outside of the container.
[0058]
The thermoplastic resin composition 13 is injected from a gate 26 of a mold 25 as shown in the figure. In this case, in consideration of the injection pressure, it is preferable to provide the pressure suppressing member 27 inside the cylindrical body at the time of injection. As described above, the thermoplastic resin composition 13 is uniformly filled into the concave portions 22 through the hole portions 23 through the concave grooves 24. In this case, the outer shape of the cylindrical container 19 does not have an uneven portion and is a preferable shape in terms of design. Further, the second container member 21 is formed into an uneven shape in an elastic range that can be forced into the first container member 20. In addition to the uneven steps, a strong adhesive force provides a bond that does not peel off. Further, since it can be made flame retardant and can withstand high temperatures, it is a suitable bonding method particularly for large containers.
[0059]
Although the embodiment has been described above, the aluminum alloy container has been applied in a wide range, and its shape is various. Needless to say, the present invention can be applied to containers of any shape and is not limited to a specific shape.
[0060]
【The invention's effect】
As described above in detail, the container having a bonding structure represented by the aluminum alloy member of the present invention and the method for manufacturing the same have a PBT or PPS system on the mating surface of the aluminum alloy member that has been subjected to a treatment for improving adhesion. The present invention relates to a container manufactured by injection molding of a thermoplastic resin composition. By manufacturing by performing this treatment, the two container members are bonded to each other without being easily detached from each other, and become a united container. As a result, the container is strengthened. Furthermore, a container having no problem in terms of shape, structure and mechanical strength could be manufactured at a low cost in a short time. Moreover, the PBT or PPS thermoplastic resin composition can be easily made flame retardant by mixing a flame retardant, and can withstand high temperatures.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a press forming process of a first container member.
FIG. 2 is a cross-sectional view showing a press forming process of a second container member.
FIG. 3 is a cross-sectional view showing an adhesive configuration in which two container members are butted together in a state of being inserted into a lower mold.
FIG. 4 is a cross-sectional view showing a completed state of the container.
FIG. 5 is a partial cross-sectional view showing an adhesive configuration according to another embodiment.
FIG. 6 is a cross-sectional view showing another mold configuration for bonding.
FIG. 7 is a partial cross-sectional view showing an embodiment applied to another container.
[Explanation of symbols]
1 ... Container
2 ... 1st container member
3, 7 ... Lower mold
4,8 ... Upper mold
5 ... recess
6 ... Second container member
9 ... hole
10 ... Gate
11 ... thermoplastic resin composition
12 ... depression

Claims (6)

A first container member formed by pressing an aluminum alloy plate;
A container constituted by abutting and joining an aluminum alloy plate and a second container member formed by pressing,
Providing a first bonding portion having a bonding space at an edge of the first container member;
Providing a second bonding portion having a bonding space at an edge of the second container member;
The first adhesive portion and the second adhesive portion are opposed to each other, and the butted first adhesive portion and the second adhesive portion contain a polybutylene terephthalate resin or a polyphenylene sulfide resin as a component. A composition is formed by injection molding and the first container part and the second container member are integrated.
An aluminum alloy container,
In order to improve the adhesiveness of the thermoplastic resin composition, the first adhesive part and the second adhesive part are immersed in a 40-50 ° C. aqueous solution of 3-10% hydrated hydrazine for several minutes. An aluminum alloy container having an adhesive structure characterized by comprising: In the aluminum alloy container according to the bonding configuration according to claim 1,
A fiber filler and / or a powder type filler for improving mechanical properties is added to the thermoplastic resin composition. In the aluminum alloy container by the adhesion configuration according to claim 2 ,
The fiber filler is at least one selected from glass fiber, carbon fiber, and aramid fiber,
The powder type filler is at least one selected from calcium carbonate, magnesium carbonate, silica, talc, glass, and clay. A first pressing step of placing the aluminum alloy plate on a press die and forming the first container member by pressing so that a first bonding portion having a bonding space is provided at an edge of the aluminum alloy plate;
A second pressing step of placing the aluminum alloy plate on a press mold and forming the second container member by pressing so that a second bonding portion having a bonding space is provided at an edge of the aluminum alloy plate;
An immersion step of immersing the first adhesive part and the second adhesive part in a 40-50 ° C. aqueous solution of 3-10% hydrated hydrazine for several minutes ;
A joining step in which the first adhesive portion and the second adhesive portion are opposed to each other, and a polybutylene terephthalate resin or a polyphenylene sulfide resin is used as a component in the abutted first adhesive portion and the second adhesive portion. The manufacturing method of the aluminum alloy container by the adhesion structure which consists of the integration process of carrying out the injection molding of the thermoplastic resin composition containing, and integrating the said 1st container member and the said 2nd container member. In the manufacturing method of the aluminum alloy container by the adhesion structure according to claim 4 ,
The method for producing an aluminum alloy container with an adhesive structure, wherein the thermoplastic resin composition is added with a fiber filler and / or a powder type filler for improving mechanical properties. In the manufacturing method of the aluminum alloy container by the adhesion structure according to claim 4 or 5 ,
Prior to the dipping step, a pretreatment step of immersing the first adhesive portion and the second adhesive portion in a basic aqueous solution and / or an acid aqueous solution is performed.

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