JPS6048315A - Manufacture of reinforced resin molding - Google Patents

Abstract

PURPOSE:To obtain a reinforced resin molding without causing tearing of reinforcements by flow of resin by a method in which a fibrous cloth reinforcement is coupled to projections and grooves, etc., provided to the cavity face of a mold, and then the resin is packed into the cavity. CONSTITUTION:Needle-like projections 13 are formed on the face of the cavity 11 of an injection mold consisting of a male mold composed of a fixed side fitting plate 1 and a fixed side mold plate 2 and a female mold composed of a movable side fitting plate 3 and movable side mold plate 4. A fibrous cloth reinforcement 21 is set on the cavity face 12 of the injection mold opened and coupled to the projections 13. The mold is clamped, and a resin is packed into the cavity 11 by injection to obtain an aimed molding. As the reinforcement, the use of fibers whose surfaces are treated is advisable for intensifying the bonding strength with the resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized by a reinforcing stone f from a fiber cloth-like reinforcing phase, and a -reinforced resin molded body? Relating to a method of manufacturing.

Rigidity, impact resistance, heat resistance, abrasion resistance, creep resistance, repeated bending fatigue resistance, dimensional stability, etc. of resin molded bodies? Koushikonseru 1: Me, fibrous reinforcement material? It is common practice to disperse the resin into a resin molded body.

In this case, the fibrous reinforcement material exhibits effective reinforcing properties r in the resin molded body f, :Iv) (rl is the fibrous reinforcement material whose fiber length is maintained as long as possible in the resin molded body -g rl
In addition, it is necessary for the resin molded body to have a uniform distribution between 5 and 1 minutes.

However, when molding a resin molded product using injection molding, which is a method for efficiently molding a resin molded product, the fiber length of the fibrous reinforcing material is already determined by the length of the molding material before molding. It is not longer than a pellet length, and furthermore, it is cut and shortened when passing through the molding machine and the narrow parts of the mold, and the fibers tend to be oriented in the direction of flow of the molding material in the mold cavity. However, there are many cases where the reinforcing properties of the fibrous reinforcing material are not fully demonstrated.

This IJ reinforcement fA'k was changed from a fibrous material to a fibrous cloth material, a fiber cloth reinforcement location was laid on the molding surface of the injection mold cavity, and after 1 injection, the molding phase 14W was injected. However, the flow of the molding material within the cavity may cause inconveniences such as the fibrous reinforcing material being torn, curled, or moved. A method for manufacturing a molded body is provided, and its features are as follows:
Reinforcement awn from fiber cloth reinforcement material Takumi 41. R-reinforced resin molded body r
The first step is to form and fill the cavities of male and female molds. With this method, the flow of resin within the cavity can cause fiber cloth-like reinforcement or tearing.
It is possible to obtain a reinforced resin molded product that can sufficiently exhibit the reinforcing properties of the fibrous reinforcing phase σ).

The present invention will be described in detail below based on the drawings.

FIG. 1 is a cross-sectional view of the main parts of a pultrusion mold, showing a male mold consisting of a fixed-side retracting plate and a fixed-side mold plate 2, and a female mold consisting of a movable-side mounting plate 3 and a movable-side mold plate 4. There are many types of stones that can be purchased. The molded product 121 of the cavity 11 (the chime-shaped protrusion 13 or the facility is made of stone) is formed using the fixed side template 2 and the movable side template 4. Retract the mold r
After the mold is opened and IJ is carried out, the stone 1 cut into a predetermined shape is placed on the formed curve 12 of the fiber cloth reinforcement phase 21i, and is held in place by the fiber cloth reinforcement Ur protrusion 13π by being pressed. Next, female type 7
In the figure, move forward and tighten the mold r, then insert the hole 7 of the sprue 20 into the cavity 1 using the usual method.
1. Fill the resin ki into the inside, and then open the mold π
A more reinforced resin molded body can be obtained.

In this way, the molding surface 12 of the mold has a protrusion 13 or a molding surface 7'.
1. Since the fiber cloth-like reinforcing phase moves when the mold is clamped, and then when the resin flows into the cavity 11r, it may tear, smear, move, or partially move. A reinforced resin molded product that fully exhibits the reinforcing properties of the fibrous reinforcing phase without causing inconveniences such as wide weaves.
It is possible to obtain it.

The shape of the protrusion] 3 is shown in Figure 1 W (the needle-shaped
x may be cylindrical, conical, prismatic, or pyramidal.<, ty
, :'Completed IJ molded body I/i: A perforated bottle that avoids forming a through hole r may be used. In the latter case, when the surface of the completed reinforced resin molded body is further coated with a skin layer, the through holes or ventilation holes can be used to eliminate all the air between the resin molded body and the skin layer. This is useful when making the molded body 2.

It is not necessary to provide the protrusion 3 over the entire area where the fiber cloth-like reinforcement 2 is laid, and it may be sufficient to provide it only at the periphery or corner of the fiber cloth-like reinforcement 41.
The 13 protrusions may be fixed integrally to the molding surface 12 in advance, and when the molding phase material flows through the cavities 11, the fiber cloth-like reinforcing ladle will not move due to the force applied to the fiber cloth-like reinforcing layer by the phase material. In this state, the protrusion 13r may be fitted into the hole 711 formed in the molding surface 12 of the mold.

FIG. 2 shows that 14 needle-shaped protrusions 1: fl are provided on a portion forming a molding surface 12γ at the tip of an ejector turbine 5 from which a molded product r is taken out of an injection mold.
Indicates J'. If it is difficult to remove a molded product from a mold with a complicated shape and it is necessary to provide an ejector turbine 5r, a protrusion 2 is attached to the tip of the bottle 5 as shown in Figure 2.
The eyebrows to be provided have a protrusion 14'z only on this tip.
Since the machining process 1 is good, the machining time for the protrusion 14 can be greatly reduced. In addition, IJ shown as an example in the figure
The ejector turbine 5 uses a known mechanism to protrude from the molding surface 12 of the movable mold plate 4 when the mold is opened, allowing the molded product to be taken out. When the mold is clamped, the return bin 6 retreats, and the ejector turbine 5, which is connected by the ejector plate 7 with the VC, returns to its original position. This protrusion method has a simple mechanism, but is it possible to use fiber cloth reinforcement?
When laying the ejector turbine 5 on the molding surface 12, the ejector turbine 5 is still in a protruding state, so in the case of a fiber cloth-like reinforcing material with weak rigidity, it is necessary to In some cases, it is difficult to lay one seam (such inconvenience does not occur in the case of highly rigid fiber cloth reinforcement material ((/+)).This inconvenience? 5r mold opening and i′i Separately, for example, a mechanism that can be moved forward and backward by fluid pressure is used, and when laying the fiber cloth reinforcement material, the molded product 12 of the tip γ template 4 of the bottle is
It would be nice if it could be made to almost the same level as the stone.

FIG. 3 is a partial perspective view showing the molding surface r of the movable mold plate 4 of the mold in another embodiment. The auxiliary template 8 is attached to the movable template 4 by screws 9. VC fixed 3 rl.

The auxiliary template 8 has a concave groove 15 formed in a shape corresponding to the weave, knit or mesh of the IJ fiber cloth reinforcing material 21, which is simply shown by the dashed line in the upper part of FIG.

A reinforced resin molded article R can be obtained by embedding a fibrous cloth-like reinforcing layer R in each groove and then injection molding the resin R after IJ.

In this case, a rib corresponding to the groove 15 is formed on the molded body 71. , the holes can also be reinforced by the ribs, making the molded body even more compact? It is possible to strengthen it.

FIG. 4 is a partial perspective view showing another embodiment of the present invention.

This is an example in which a snap part of a hook-and-loop fastener of a snap-on type is used as the locking tool 16 on the molding surface 120 of the movable mold plate 4. This locking tool 16r (can lock the fiber cloth-like reinforcing phase to the molding surface 12r).

The means for locking the fiber cloth-like reinforcement h' h of the present invention to the molding surface of the mold have been described above.
5 and/or the locking tool 16 can be provided on either fl or -tr+ of the fixed side mold plate 2 or the movable side mold plate 4, and it is possible to provide it on the molding surface of both the fixed side template 2 and the movable side template 4. In order to lay a fiber cloth-like reinforcing layer on the molding surface of the mold corresponding to the part that becomes the back surface in appearance or the part where particularly strength is required.

Regarding the molding mold, the method for locking the fibrous cloth reinforcement r is exclusively explained in the injection molding mold.However, the present invention is applicable to the brace molding mold and the transfer molding mold. I/1
It is possible to apply it even if

Examples of the fiber cloth-like reinforcing phase include glass fiber, carbon fiber,
Woven fabrics, knitted fabrics, non-woven fabrics, etc. composed of natural or synthetic fibers, fine metal wires, etc. can be used, and they can be melted and bonded to the resin without deteriorating its properties. Strengthening IJ fiber VC surface treatment? The alms IJ thing seems to be a special type. As the reinforcing material in the form of fiber cloth, in addition to fine thorns, as can be seen from FIG. 3, coarse thorns can also be used.

Resins that can be used in the present invention include thermosetting or thermoplastic resins, and resins such as VC"C" and "!1" contain fillers such as calcium carbonate, talc, wood powder, and paper. Even if it is a matching fee, it is good υ・0

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the main part of a mold showing the implementation of the present invention.
FIG. 2 is a sectional view of a mold in another embodiment, and FIGS. 3 and 4 are partial perspective views of a mold in another embodiment. 11... Cavity 12... Molding surface 15... Concave groove 16... Locking tool 21... Fibrous cloth w3 fluorescent material Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] The reinforced resin molded product is reinforced with a fibrous reinforcing material, and the fibers are added to the molding surface of the cavity formed by the male and female molds, and the protrusions, grooves, or locking tools are placed on the molding surface of the cavity. A method for producing a reinforced resin molded body, which comprises filling a cavity with a resin after a cloth-like reinforcing screw is secured.