JPS5914921A - Combined type molded item of thermoplastic different synthetic resin materials and manufacture thereof - Google Patents

Abstract

PURPOSE:To perform easily the firm and integral union of a molded member of a reinforcing resin and a molded member of a general-purpose resin, by mating corresponding projections and recesses of the joining surfaces of both the members. CONSTITUTION:The molded material, for example, an attaching seat frame 2, of a reinforcing synthetic resin such as polycarbonate is arranged at a position where a mechanical strength is required, the molded material, for example, a flanged conduit section 3, of a general-purpose synthetic resin such as polypropylene is arranged at a position where a mechanical load is less, and their joining is carried out in such a way that for example the recesses 4 and the projections 5 with a prescribed interval between the recesses 4 and with a prescribed interval between the projections 5 are mated. Such mating sections may be alternatively formed to the upper surface and the undersurface of the attaching seat frame 2 with a prescribed interval between them or ridges on the inner circumferential surface of the attaching seat frame 2 may be mated to slots 7 formed in the flange outer circumferential surface of the conduit section 3.

Description

[Detailed description of the invention]

The present invention relates to a bonded molded article made of different thermoplastic synthetic resin materials and a method for manufacturing the same. When manufacturing various molded products using thermoplastic synthetic resin, if a single material made of general-purpose synthetic resin is used, which is economically inexpensive and has good workability, it will not have enough mechanical strength, so it will not be possible to produce parts with insufficient strength, that is, load. The active parts are molded to be as thick as necessary, and the entire molded product is still made larger to compensate for its strength, but it has become larger, has an unbalanced shape, and has become bulkier. Molded products have many inconveniences as a product, and there are still problems in terms of actual use and installation. This invention relates to a synthetic resin molded product, in which reinforced synthetic resin molding material is placed in areas where mechanical strength is required, and general-purpose synthetic resin molding material is placed in areas where mechanical load is small. [3] Meda different synthetic resin moldings have been made with different joints that have traditionally been difficult to integrate. It was developed with the intention of creating a strong, integral connection between reinforced and general-purpose synthetic resin drawing molding materials, and is characterized by the fact that the concave and convex portions facing each other on the bonding surface of the reinforced and general-purpose synthetic resin patterning material are connected in a state where they are interlocked with each other. Next, a specific example of a bonded molded product made of a thermoplastic heterogeneous synthetic resin material will be described with reference to the drawings, taking an example of a pipe joint for toilet piping. The toilet pipe fitting (1), which is one of the synthetic resin molded products shown in Fig. 1, is made of a resin with strong mechanical strength, such as polyamide or polycarbonate. Inside the ring-shaped mounting frame (2) made of reinforced synthetic resin material such as polyacetal resin, there is a flange conduit section (3) made of general-purpose synthetic resin material such as vinyl chloride, polystyrene, polypropylene, ABS resin, etc. Concave portions (4) and convex portions are provided internally and face each other in arbitrary directions, for example, in the internal and external directions, with a predetermined interval maintained at the joint surface of the flange of the mounting seat frame (2) and the conduit portion (3). (5) are connected in a state of occlusion at multiple locations, and these concave and convex occlusions are arranged alternately at predetermined intervals on both upper and lower surfaces of the inner surface of the ring-shaped mounting frame (2), that is, in a staggered manner or in the same perpendicular manner. Figure 4), which appears on the line (Fig. 4), and the mounting seat frame (2)
) on the inner circumferential surface of the conduit portion (3).
), and the mounting seat frame (2) and the conduit part (3) are firmly interlocked. (81+8+ is a mounting arm protruding from the relative position of the mounting seat frame (2), and the arm has a screw hole (9) for installing a pipe joint and a bolt hole (1o) for installing a toilet bowl, respectively. In this combined molded product, the pipe joint (1), the mounting frame (2), which is subject to the most mechanical force, is made of reinforced synthetic resin material, and other loads are compared. The conduit section (3), which is a part that does not interact with other materials, is constructed using inexpensive general-purpose synthetic resin materials. By forming uneven parts in the occlusal form, the joint integrity is strong without wobbling in any direction, and the selection of materials makes the molded product itself low in bulk.
While making full use of the characteristics of multiple resin materials that are materially different, it is extremely easy to obtain a molded product that can withstand external forces and has strong integrity. Since they are joined together in an occlusal state, if a defective molded product occurs, it is possible to reuse the pure material by destroying and separating the two dissimilar materials, such as the mounting seat frame and the conduit section. In addition, as another example of the synthetic resin molded product of the present invention, a container (la
), the hoop-shaped reinforcing frame (2aX2a) made of reinforced synthetic resin material is attached to the opening and outer periphery of the hem of the inner container base (3a) made of general-purpose synthetic resin material. A recess provided opposite the surface (4a
) and the convex portion (5a) in an occlusal state, the entire container can be made stronger. Next, to describe the method for manufacturing a bonded molded product made of thermoplastic heterogeneous synthetic resin materials, the first step is to mold a reinforced synthetic resin molded material.
Step: The molded material formed in the first step is fitted into a mold for bonding molding. 2nd step, following the 2nd step, a 3rd step of heating and pressurizing the general-purpose synthetic resin material into the mold fills the gap while pressing the molded material molded in the 1st step against the mold. This is a molded material made of reinforced resin that deforms as a relief allowance, and a molded material made of general-purpose resin that is bonded to the bonding surface with concave and convex portions that interlock with each other in any direction. This will be explained with reference to drawings, taking as an example a pipe joint for toilet piping, which is one of the combined molded products. In the pipe joint (1), a ring-shaped mounting frame (2) is formed in the first step using a synthetic resin with strong mechanical strength, such as reinforced synthetic resin such as polyamide, polycarbonate, or polyacetal resin. (2) extends outward at a relative position [7] A pair of mounting arms [8] +81 are protruded, and pipe joint mounting screw holes (9) are provided in each part (8) of the ) and toilet bowl mounting bolt holes (10) are drilled respectively, and an annular band-shaped protrusion (6) is integrally provided on the inner circumferential wall surface of the annular mounting seat frame (2). This mounting seat frame (2) is fitted into a joining mold (11), and a part of the outer circumference of this folding mounting seat frame (2), for example, the tip of the arm (8) of the mounting seat frame (2). An appropriate gap (12) is provided between the part and the mold (11), and the outer circumferential part of the mounting seat frame (2) is provided alternately on both upper and lower surfaces at a predetermined interval, that is, in a staggered manner or at the same time. Appropriate notches (13) are carved on the vertical line, and the mounting seat frame (
2) is fitted into the mold (11), this notch (
13), there is a gap (14) between the mold (11) and the mold (11).
) is derived. After that, a general-purpose synthetic resin material such as vinyl chloride, polystyrene, polypropylene, ABS resin, etc. is filled into the cavity (7) of the mold (11) under heat and pressure, and an annular groove (15) for fixing the backing is formed at the upper edge.
A conduit part (3) integrally formed with a collar part (16) having
) is formed. In the process of forming this conduit portion (3), the reinforced synthetic resin mounting frame is temporarily molded by the synergistic effect of the filling pressure of the general-purpose synthetic resin material and the heating temperature of the injection molding temperature of around 200°C. (2) is appropriately softened and pressed outward with a general-purpose resin material, and the mounting seat frame (2) is pressed outward with a general-purpose resin material.
) A gap (12) formed in advance between the mounting frame and the mold, including a notch (13) carved in the outer peripheral wall surface of the
The section (14) acts as a clearance for the reinforced resin mounting frame, and the mounting frame (2) deforms in the direction of the mold, and in response, a part of the general-purpose synthetic resin deforms the mounting frame (2). Derived from the concavity (
5), and the deformed part of the mounting seat frame is uneven (4) (
Due to the occlusal state of the 51 part and the existence of the belt-shaped convex part (6) of the mounting seat frame, the periphery of the collar of the general-purpose resin conduit part has a belt-shaped recess (7).
During the molding process, the reinforced resin mounting frame and the subsequent conduit part are firmly connected with the concave and convex portions interlocking at the joint surface. The feature of this manufacturing method is that the melting temperature of the reinforced synthetic resin is 300
Taking advantage of the fact that around 0 parts are required, the reinforced resin molded material that has been molded first is fitted into the bonding mold, and then a general-purpose molded material with a melting temperature of around 200°C with a temperature difference therein is used. Synthetic resin mold cavity

[9] At the stage of forming a general-purpose resin molding by heating and pressurizing and filling the parts, the occlusal state of uneven parts is revealed on the joint surfaces of both different synthetic resins, and the reinforced resin molded material By using the gap appropriately provided between the mold and the mold, a part of the general-purpose resin is removed in response to the deformation and movement of the reinforced resin that occurs when the gap disappears. By biting into the recess in an occlusal state, both parts can be synchronized to form a molded material made of general-purpose resin and a strong connection can be completed. It is possible to extremely easily and strongly combine molded materials, and it is extremely easy to create a robust product while fully utilizing the strength and other characteristics of resin materials in each component that makes up each part of the molded product. can be mass-produced.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a pipe joint that is a combined molded product that can carry out the present invention, Fig. 2 is a partially cutaway front view of the pipe joint, and Fig. 3 is a -rll'll view of the pipe joint. Fig. 4 is a side view with a section cut away, Fig. 4 is a cross-sectional view of the mold before filling the general-purpose resin material with the mounting seat frame, which is a part of the pipe joint, fitted into the mold, and Fig. 5 is a cross-sectional view of the mold before filling with general-purpose resin material. 4 is a cross-sectional view taken along line A-A in Fig. 4, Fig. 6 is an enlarged longitudinal sectional view showing the notch of the mounting seat frame in the mold before filling the general-purpose resin material, and Fig. 7 is a cross-sectional view showing another embodiment. 6 is a diagram corresponding to FIG. 6, FIG. 8 is a vertical cross-sectional view of FIG. 6 at the final stage of filling, FIG. 9 is a vertical cross-sectional view of FIG. 7 at the final stage of filling, and FIG. 10 is a combined molded product of the present invention. FIG.
Figure 2 is a vertical sectional side view of the main parts of the container. In the figure, (1) is a pipe joint that is a joint molded product made of different resins, (2) is a mounting frame, (3) is a conduit portion, (4) is a recessed portion, (5) is a convex portion, ( 6) is a band-shaped convex part, (7) is a band-shaped concave part, (11) is a bonding mold, (1 is a gap, (13)
is a notch, (14) is a gap, (1a) is a container that is another type of bonded molded product made of different resins, (2a)
is the reinforcing frame, (3a) is the container base, (4a) is the recess, (5
a) shows a convex portion. [11] JP-A-59-14921 (5)

Claims (1)

[Scope of Claims] 1. A molded product assembled by bonding a thermoplastic reinforced synthetic resin molded material and a general-purpose synthetic resin molded material, wherein opposing uneven portions on the bonding surfaces of both molded materials are respectively A bonded molded product made of thermoplastic heterogeneous synthetic resin material that is bonded in an occlusal state. 2. The bonded molded article of thermoplastic heterogeneous synthetic resin materials according to claim 1, wherein the concave-convex bonding portions are located on both upper and lower surfaces of the bonding surfaces of both molded materials and are in an interlocking state at appropriate intervals. 3. The concavo-convex joint portion fits together in a band shape over the entire length of the joint surfaces of both molded materials.
A bonded molded product made of thermoplastic heterogeneous synthetic resin materials as described in Section 1. 4. The first step of molding the reinforced synthetic resin molded material, when the molded material molded in the first step is fitted into the bonding mold, a part of the outer peripheral surface of the molded material and the mold A method for manufacturing a bonded molded product of thermoplastic heterogeneous synthetic resin materials, which comprises a second step of providing an appropriate gap between the two, and a third step of filling the mold with a general-purpose synthetic resin material under heat and pressure following the second step. . 5. The gap is formed by making a part of the reinforced synthetic resin molded material smaller than the mold. Production method. 6. The bonded molded product of thermoplastic heterogeneous synthetic resin materials according to claim 4 or 5, wherein the gap is formed by cutting out a part of the outer periphery of the reinforced synthetic resin molded material. manufacturing method. 7. The thermoplastic material according to claim 6, wherein the notches provided in the reinforced synthetic resin molded material are located on the outer periphery of the molded material and are cut alternately at predetermined intervals on both upper and lower surfaces of the molded material. A method for manufacturing a bonded molded product of different synthetic resin materials. 8. Any one of claims 4 to 7, wherein a band-shaped convex portion is provided over the entire length of the joint surface of the reinforced synthetic resin molded material with the general-purpose synthetic resin molded material. A method for producing a bonded molded article of thermoplastic heterogeneous synthetic resin materials as described in .