JP2014051062A - Panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that when a reinforcement material (reinforcing pipe or the like) is inserted after molding a resin part of a panel formed by blow molding of a thermoplastic resin, production time becomes long and production cost is increased.SOLUTION: A reinforcement material composed such that a face bar is adhered to both sides of a double elastic projection sheet formed such that projection parts of two rectangle elastic projection sheets are abutted is performed by insert blow molding, at least two pairs of sides in pairs in which each side counters the two rectangle elastic projection sheets are made an undercut configuration in insert blow molding of a reinforcement material.

Description

The present invention relates to a panel with a reinforcing material formed by blow molding of a thermoplastic resin.

As a prior art regarding the panel with a reinforcing material formed by blow molding of a thermoplastic resin, there is one disclosed in Patent Document 1.

However, since the strength is increased by inserting a reinforcing material (such as a lean force pipe) into the resin portion after the resin portion is formed by blow molding, the method disclosed in Patent Document 1 reinforces after molding. Since the processing necessary for material insertion is performed, the production time is increased and the production cost is increased.

This will be described in more detail with reference to the drawings.
FIG. 1 is a perspective view of an automotive deck board 1 formed by blow molding of a thermoplastic resin according to a conventional example.

Reference numeral 2 denotes a lean-force pipe having a square cross section that is inserted and attached to the gap in the deck board 1 from the direction of arrow A, and 3 denotes an insertion hole of the lean-force pipe 2.

In Patent Document 1, after the deck board 1 is formed by blow molding, the lean force pipe 2 is inserted from the insertion hole 3 that is drilled by an end mill (not shown). Strength is increased.

However, in the method disclosed in Patent Document 1, since the insertion hole 3 necessary for the insertion of the lean force pipe 2 is formed after the deck board 1 is molded, the production time is increased and the production cost is increased. Resulting in.

JP 2010-142955 A

The problem to be solved is that if a reinforcing material (a lean force pipe or the like) is inserted after molding the resin part of the panel by the method disclosed in Patent Document 1, the production time becomes long and the production cost increases. Is a point. The present invention has been made to solve the above-described points.

A panel formed by thermoplastic resin blow molding,
The main feature is that the reinforcing material formed by sticking the face material to both surfaces of the double elastic protrusion sheet formed by abutting the protrusion portions of the two rectangular elastic protrusion sheets is insert blow molded. And

Further, the second main feature is that at least two sides of the pair of opposing sides of the two rectangular elastic projection sheets are in an undercut form in the insert blow molding of the reinforcing material. .

According to the present invention, there is an advantage that a product with a short production time and a low production cost is provided.

The perspective view of the deck board for motor vehicles formed by the blow molding of the thermoplastic resin which shows a prior art example The perspective view of the panel which concerns on this invention The perspective view of the reinforcing material which concerns on this invention AA sectional view of the reinforcing material in FIG. The perspective view which showed the blow molding aspect at the time of setting a reinforcing material in the division | segmentation metal mold | die which concerns on this invention Part B enlarged view in FIG. CC equivalent view in FIG. 5 when the slide and the support member are stored in the split mold

The purpose of providing products with short production time and low production costs
A panel formed by thermoplastic resin blow molding,
This was realized by insert-blow molding a reinforcing material formed by attaching face materials to both surfaces of a double elastic projection sheet formed by abutting the projection portions of two rectangular elastic projection sheets.

The configuration of the present invention will be described based on the embodiments of the invention as follows. In addition, the same code | symbol as a prior art example represents the same member.

FIG. 2 is a perspective view of the deck board 1 according to the present invention.
However, in order to make it easy to see, the whole is vertically cut in half.

The deck board 1 is formed of a reinforcing member 4 and a resin portion 5 that covers a portion excluding one surface of the reinforcing member 4.

FIG. 3 is a perspective view of the reinforcing member 4, and the reinforcing member 4 has two rectangular elastic members in which a plurality of projections 11 having a hexagonal frustum shape are arranged in parallel with each side of the reinforcing member 4. A four-layer hollow honeycomb structure in which a projecting sheet is opposed and a face material is bonded to a double elastic projecting sheet formed by fusing the tips of the projecting portions 11 together.

The two face materials constituting the reinforcing material 4 have a rectangular shape, and when the deck board 1 is completed, the face material 9 and the resin that are not covered with the resin are covered with the surface material 9 and the resin. The back material 10 is the one that is not visible.

FIG. 4 is a cross-sectional view taken along the line AA in FIG.
The length “a” of one side of the surface material 9 is shorter than the length “b” of one side of the opposite back material 10.

FIG. 5 is a perspective view of the reinforcing member 4 set in the split molds 102 and 102 ′ for blow molding of the resin portion 5 of the deck board 1 and the parison 101 is suspended.
However, in order to make it easy to see, the whole is vertically cut in half.

The deck board 1 is formed by insert blow molding of a thermoplastic resin.

With insert blow molding, after setting an insert product in a split mold, a parison made of a thermoplastic resin such as polypropylene in a semi-molten state is suspended in the split mold, and the insert product is wrapped in a parison. This is a method of making composite parts with integrated inserts.

The insert product and the composite component in the above description refer to the reinforcing member 4 and the deck board 1 in the present invention, respectively.

The split mold 102 includes a slide 6, and the slide 6 slides parallel to the mold opening direction of the split mold 102 by a mechanism (not shown) for moving the slide 6. Unlike the split mold 102, 'does not have a slide or slide mechanism.

FIG. 6 is an enlarged view of a portion B in FIG.

7 is a support member for supporting the reinforcing material 4 so as not to fall from the split mold 102, and a mold of the split mold 102 is provided by a mechanism (not shown) provided in the split mold 102. Slide parallel to the opening direction.

Next, a method for manufacturing the deck board 1 will be described.
After the slide 6 and the support member 7 are protruded toward the cavity of the split mold 102, the reinforcing material 4 is set on the split mold 102, and then the split molds 102 and 102 'are clamped. The slide 6 and the support member 7 are stored in the split mold 102 at the same time as the mold clamping or after that, and then compressed air is blown into the parison 101 and blown up.

The thermoplastic resin applied to the parison 101 is not limited to polypropylene, but polyethylene, other polyolefin resins, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyamide resins, and polyacetal resins. Syndiotactic polystyrene, polystyrene, rubber-modified polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, modified polyphenylene oxide, polyphenylene sulfide, polycarbonate, etc. . Further, a composite material obtained by kneading glass fiber, carbon fiber, boron fiber, calcium sulfate powder, calcium carbonate powder and the like into the thermoplastic resin may be used.

FIG. 7 is a cross-sectional view corresponding to the line CC in FIG. 5 after the slide 6 and the support member 7 are stored in the split mold 102 and blown up.

Since the slide 6 is stored, the resin wraps around where the slide 6 is present, and the deck board 1 into which the reinforcing material 4 is inserted is formed.
However, the support member 7 is not shown in FIG.

Since the length a of one side of the surface material 9 constituting the reinforcing material 4 is shorter than the length b of the opposite side of the back material 10, the reinforcing material 4 is used in insert blow molding. Is in an undercut form, so that the resin wraps around the reinforcing material 4, is cooled and solidified as it is, and the reinforcing material 4 is hooked at the undercut portion, so that the insert blow molding is completed and the reinforcement is simultaneously performed. The deck board 1 in which the material 4 is firmly inserted can be formed.

In the above embodiment, a hexagonal frustum is described as an example of the honeycomb structure of the reinforcing member 4, but the present invention is not limited to the hexagonal frustum, and may be a truncated cone or another truncated pyramid.

As described in the above embodiments, according to the present invention, the slide and the support member are stored in the divided mold at the same time as the mold clamping using the slide mechanism or at a later timing. Since the resin spreads to the place where the support member was present and the reinforcing material can be firmly inserted at the same time as the molding, a product with a short production time and a low production cost can be provided.

The present invention is not limited to an automobile deck board, and can be used for general panels such as luggage boards.

DESCRIPTION OF SYMBOLS 1 Deck board 2 Reinforce pipe 3 Insertion hole 4 Reinforcement material 5 Resin part 6 Slide 7 Support member 9 Surface material 10 Back surface material 11 Protrusion part 101 Parison 102,102 'Split mold

Claims (2)

A panel formed by thermoplastic resin blow molding,
A panel comprising a double elastic projection sheet formed by abutting projecting portions of two rectangular elastic projection sheets, and a reinforcing material formed by sticking a face material to both surfaces is insert blow molded. . 2. The pair of opposing sides of the two rectangular elastic projection sheets according to claim 1, wherein at least two sides are undercut in insert blow molding of a reinforcing material. Panel described.