JPS61114835A - Blow molding apparatus - Google Patents

Abstract

PURPOSE:To make it possible to provided in a resin body an accessory that is in firm contact with the inner wall of the resin body, by providing an accessory support section that can be moved in directions toward a nozzle and a mold to be opened, a housing section for housing the accessory support section that has been closed, and a driving section. CONSTITUTION:The undersurface of an accessory 13 is supported by an accessory support section 5 is such a way that the accessory 13 is positioned in a resin cylinder body (A) with the accessory 13 out of contact with the inner wall of the resin cylinder body, then molds 4 are closed and compressed air is blown into the resin body to be molded. Then the accessory support 5 is moved in directions toward a nozzle 2 and the molds 4 to be opened so that the accessory 13 is pressed securely to the inside of the resin body, and the accessory support section 5 is closed and is positioned inward of the line produced from a housing section 7 to be housed thereinto. When it is required that the resin molded item is removed, since the accessory support section 7 positioned in the resin molded item is housed in the housing section 7, the accessory support section 7 can be drawn out without abutting against the inside of the resin molded item.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a blow molding apparatus for molding a resin molded product having accessory parts such as a core material inside.

(Prior Art) As a conventional blow molding apparatus, for example, one shown in FIG. 5 is known.

This conventional blow molding device has an attached part O1 in a mold 0.
2 and 02, and then compressed air was blown in from the blowing needle 03 to form the mold.

(Problems to be Solved by the Invention) However, according to this conventional blow molding device, in order to fix the accessory parts in the mold, the accessory parts come out from the resin molded product. It cannot be applied to parts that cannot be exported to the public, and it does not look good, and the parts that are exposed to the outside may require anti-corrosion treatment, making manufacturing time-consuming. There was a problem.

(Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the present invention supports the lower surface of the accessory part whose upper part is divided, and moves in the direction of the nozzle and the direction of the mold to open it. The present invention includes an accessory support part, a hollow columnar storage part in which the accessory support part is closed and stored, and a drive part that moves the accessory support part.

(Function) Therefore, the attached parts should be positioned inside the resin cylinder so that they do not touch the inner wall of the resin cylinder.

After supporting the bottom surface of the accessory part with the accessory support part,
The mold is clamped and compressed air is blown into the resin body to form the resin body.

Next, the accessory support part is moved in the nozzle direction and the mold direction to open it, and the accessory part is pressed and fixed inside the resin body.

After that, the accessory support part is closed and stored in the storage part.

Note that storage here refers to being located inside the extension line of the storage section.

Next, after the resin has hardened, the mold is opened and the resin molded product is removed, but since the accessory support part located inside the resin molded product is stored in the storage section, the inside of the resin molded product It can be pulled out without getting caught.

(Example) Hereinafter, a blow molding apparatus according to an example of the present invention is shown in FIGS. 1 to 4, and its structure will be described in detail.

In FIG. 1, reference numeral 1 denotes a dispensing device, which serves to guide the softened resin body A from a nozzle 2 into a cylindrical shape.

Incidentally, reference numeral 3 denotes a blowing needle which injects compressed air and is provided in the nozzle 2.

4.4 is a mold, and a mold surface 41.4 is formed inside.
The resin body A is molded in the shape of 41, and an upper relief groove 42.42 for the injection needle 3 is formed in the upper part, and a lower relief groove 43.42 for the storage section 7, which will be described later, is formed in the lower part. 43
is formed.

Reference numeral 5 denotes an accessory support part (hereinafter referred to as support part), which includes a first upper stay 51. Second upper stay 52, first lower stay 53. Four stays of the second lower stay 54 are rotatably provided on a rotation shaft 6 fixed to the storage section 7 described later.

Reference numeral 7 denotes a storage section, which stores the opening/closing mechanism 8 for opening and closing the support section 5 and the rain upper stays 51, 52 of the support section 5.

It should be noted that storage here refers to positioning inside the extension line of the storage section 7.

The opening/closing mechanism 8 includes a link part 81 connected to the rain upper stays 51 and 52, an opening/closing rod 82 connected downward from the link part 81, and an opening/closing lever 83 connected to the opening/closing rod 82. It is formed.

The opening/closing lever 83 is pivotally attached to the opening/closing rod 82, and is slidably supported by a rotation shaft 71 provided in the storage section 7 by an amount corresponding to an elongated hole 84, and is connected to the hydraulic pressure described later. It is pivotally attached to an opening/closing bracket 9 attached to the cylinder so as to be slidable by an elongated hole 85.

Reference numeral 10 denotes a hydraulic cylinder as a driving unit, which moves the support unit 5 and opens and closes it. A portion 72 is slidably provided.

Note that 12 is a hydraulic pipe, which connects the hydraulic cylinder 10.
It supplies hydraulic pressure to the

Therefore, by moving the housing section 7 up and down with the hydraulic cylinder 10, the support section 5 can be moved up and down and opened and closed.

13.13 is a reinforcing material as an accessory part, and is an L-shaped iron pipe that supplements the strength of the molded product.A plurality of fixing holes 14 are provided on the outside, and the above-mentioned Stay insertion holes 15, 16, 17, and 18 for inserting stays 51, 52, 53, and 54 are provided.

The fixing holes 14 are used to securely fix the reinforcing material 13.13 to the resin body 'A by infiltrating the resin into the fixing holes 14.

Next, the operation of the embodiment will be explained.

First, as shown in FIG. 1, hydraulic pressure is supplied to the hydraulic cylinder 10 so that the support part 5 is opened to a certain extent, the storage part 7 is raised, and then the accessory parts 13 and 13 are supported by the support part 5.

Note that the opening degree of the support portion 5 at this time is such that the accessory part 13 does not touch the inner wall of the cylindrical resin body A.

Next, the softened resin body A is drawn out in a cylindrical shape from the nozzle 2 of the drawing-out device 1, and then, after the molds are clamped with the molds 4, 4, compressed air is blown into the resin body A through the blowing needle 3. Mold surface 4
1.41 (Figure 2).

Next, as shown in FIG. 3, when hydraulic pressure is supplied to the hydraulic cylinder 10 and the housing section 7 is raised, the opening/closing lever 83 is rotated and the opening/closing rod 82 is raised. is opened, and the inner lower stay 53.
54 is also reinforced by both upper stays 51 and 52 13.13
The supporting part 5 is moved in the direction of the nozzle 2 by the raising of the storage part 7 by the drive of the hydraulic cylinder 10, and the opening/closing mechanism 8
The molds 4 and 4 are opened in the four directions.

Next, after the resin body A has hardened, the molds 4, 4 are opened, the hydraulic pressure of the hydraulic cylinder 10 is released, and the storage section 7 is lowered, and the opening/closing lever 83 is rotated accordingly. The upper stays 51 and 52 are closed and stored in the storage section 7 (FIG. 4).

After that, when the resin molded product Al is pulled out from the storage part 7, the lower stays 53 and 54 are also pushed up by the resin molded product Al and rotated to be stored in the storage part 7, so that the support part 5 is not caught. The resin molded product A1 can be pulled out.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included.

For example, although the support part 5 is opened as the storage part 7 rises, it may be opened manually or the like independently of the movement of the storage part 7.

Further, although the drive unit is driven by hydraulic pressure, other equivalent means such as pneumatic pressure or a motor may be used.

Furthermore, the accessory parts are not limited to pipe-shaped ones.

Further, materials other than the reinforcing material 13 may be used.

(Effects of the Invention) As described above, according to the present invention, since the accessory support part that supports the accessory moves in the nozzle direction and the mold direction, the accessory part that is in close contact with the inner wall of the resin body is placed inside the resin body. Since it is possible to install accessories, it is possible to apply them to parts that cannot be removed, and the appearance is improved.
Furthermore, there is no need for anti-rust treatment on the exposed parts of the attached parts, resulting in an effect of saving time and effort.

Further, in addition to the above-mentioned effects, in the embodiment, the accessory parts can be moved toward the nozzle and the mold by driving the hydraulic cylinder, which provides good operability.

Furthermore, since the attachment holes are provided in the accessory parts, the attachment parts can be fixed more reliably.

Furthermore, since each accessory part is supported by two wooden stays, support is reliable.

[Brief explanation of the drawing]

1 to 3 are cross-sectional views showing a blow molding apparatus according to an embodiment of the present invention, FIG. 4 is a cross-sectional view showing main parts of the apparatus according to the embodiment and a resin molded product, and FIG. 5 is a cross-sectional view showing a conventional apparatus. Figure. 2... Nozzle 4... Molding die 5... Accessory parts support section 7... Storage section 10... Hydraulic cylinder (driving section) 13... Reinforcement material (accessory part) Patent applicant Nissan Shatai Co., Ltd. Figure 1 Figure 2 Section 3 Figure 4

Claims (1)

[Claims] 1) An accessory support part whose upper part supports the lower surface of the divided accessory part and opens by moving toward the nozzle and mold direction, and a hollow column-shaped storage part in which the accessory support part is closed and stored. A blow molding apparatus comprising: a drive section for moving the accessory part support section.