JPH0121018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile partition plate made of synthetic resin having a special structure and integrally molded by a blow molding method, and a method for manufacturing the same.

Usually, a spare tire 2 is stored in the trunk of a car or in the luggage space of a hatchback or van, as shown in Figure 1a and b. It has a flat, double-bottomed surface for concealment and easy loading of cargo. Furthermore, as shown in FIGS. 2a and 2b, some hatchpacks are provided with an upper partition plate 1b that hides the luggage loaded in the luggage space and separates the interior of the vehicle from the luggage space. This upper partition plate 1b
is usually opened and closed in conjunction with the glass hatch 3, making it easy to take luggage in and out.When the glass hatch 1b is closed, the partition plate 1b forms a flat surface on the back of the seat 4, concealing luggage and You can put your belongings on the top.

By the way, the bottom partition plate 1a has a double bottom that hides the spare tire 2, so it is less deformed by loaded objects, has particularly strong bending strength, is lightweight,
It must not damage the loaded items and must be durable. In addition to the above-mentioned physical properties, the upper partition plate 1b is required to have an aesthetic appearance as an interior material for the interior of the vehicle, since it partitions the interior of the vehicle.

Currently known partition plates 1, 1a, and 1b are made of metal, but they have the disadvantage that they become heavy if they are sufficiently strong.

In view of the above circumstances, the present invention provides a synthetic resin automobile partition plate that has high bending strength and impact strength, is lightweight, does not damage loaded objects, is inexpensive, and has excellent aesthetics. The gist of this is that the main body is a hollow plate formed by air blowing a synthetic resin parison, and a part of the parison is formed integrally with the top and bottom plates inside the main body, and is provided at the required position. Consists of the required number of reinforcing plates,
The reinforcing plate is a synthetic resin automobile partition plate characterized in that it has a cutout that allows communication between all the insides of the main body, and a synthetic resin parison is inserted into a blow mold and clamped, and the blow mold Using the required number of sliding plates provided at the required positions on one or both sides of the mold, the side walls of the parison are partially crimped so that the inside of the mold-clamped parison is all in communication, and then air blowing is performed. The product is made of synthetic resin, characterized in that, at the same time, the crimped portion is molded into a plate shape, and a required number of reinforcing plates made of part of the parison are formed at required positions inside the main body. This is a method for manufacturing a partition plate for an automobile.

The present invention will be explained in detail below with reference to embodiments shown in FIGS. 3 to 9.

FIG. 3 shows a synthetic resin automobile partition plate 1 according to the present invention, which has a hollow plate body with side walls 7 integrally molded around an upper plate surface 5 and a lower plate surface 6. Inside the main body, reinforcing plates 10 and 11 integrally formed over the top plate 5 and the bottom plate 6 are provided vertically and horizontally.

These reinforcing plates 10 and 11 are formed using a part of the synthetic resin parison when the main body is formed by air blowing, and are shown in the partially cutaway perspective view of FIG. 4 (portion A in FIG. 3). The upper plate 5 and the lower plate 6 are supported at regular intervals to prevent deformation of the plate surfaces, and each of the reinforcing plates 10 and 11 has a cutout that connects the sections formed by these plates. Removal parts 10a and 11a are formed. Further, the reinforcing plates 10 and 11 do not appear on the outer surface of the main body, and no depressions or the like that would reduce the moment of inertia of the area are formed on the surfaces of the upper plate 5 and the lower plate 6. Therefore, in the synthetic resin automobile partition plate of the present invention, the top plate 5 and the bottom plate 6 are firmly fixed by the peripheral side wall 7 and the internal reinforcing plates 10 and 11, so that the plate surface does not change during bending deformation. Since there is no opening phenomenon as seen in the concave ribs, the moment of inertia of area is large in both vertical and horizontal directions, and there is no need to increase the wall thickness, making it possible to reduce weight. have

5a, b, and c sequentially show an example of the manufacturing process of the synthetic resin automobile partition plate of the present invention, in which 21 is a blow mold consisting of a pair of split molds 21a and 21b; 2 is a mold fixing plate, and 23 is an air nozzle.

In the split molds 21a and 21b, a vertical sliding plate 24 and a horizontal sliding plate 25, which are arranged at a predetermined interval, move in and out so that they abut each other in the mold. It can be freely penetrated. This sliding plate 2
The entry and exit of the parisons 4 and 25 is usually carried out using hydraulic, pneumatic, or mechanical means, such as hydraulic means 26, and after the mold is closed, they are pushed into the mold to clamp and partially press the parison.

First, as shown in FIG. 5a, the split molds 21a and 21b are released from the extruder (not shown).
A molten parison 27 is extruded into the center of the molten parison 27. Next, as shown in FIG. 5b, after closing the blow mold 21 and pinching off the parison 27, the hydraulic means 26
The sliding plates 24 and 25 on both sides are pushed out into the mold, and both walls of the parison 27 are partially sandwiched and crimped. Note that it is also possible to pinch off the parison 27 by closing the blow mold 21 with the sliding plates 24 and 25 pushed out.

FIG. 6 shows the crimped state of the parison 27. The parison 27 is partitioned vertically and horizontally by sliding plates 24 and 25, and the sliding plates 24 and 25 are provided on the surfaces of both side walls.
Although a depression is created by the external pressure caused by 25, the both side walls come into contact with each other and welded parts 28 and 29 are formed. Once the parison 27 has been crimped, the hydraulic means 26 returns the sliding plates 24 and 25 to a position where their tips are flush with the mold surface, and fixes them so that they do not pull in due to internal pressure. Blow with air. Due to this air blow, the parison 27 expands to its full cavity as shown in FIG.
8 and 29 are stretched into a plate shape, and a reinforcing plate 1 is attached thereto.
0,11 are formed.

FIG. 7 shows the state in which the reinforcing plates 10 and 11 are formed. In the state shown in FIG. 6, the sliding plates 24 and
At the welded parts 28 and 29 after removing the welded parts 25, the side walls around the welded parts 28 and 29 are also stretched in the direction of the mold surface by the air blow, and due to the stretching force,
Welded part 2 is thicker and has a larger heat retention capacity than the side wall part
8 and 29 are pulled in the direction of the mold surface and finally become reinforcing plates 10 and 11. At this time, sliding plate 2
4, a portion close to the sliding plate 25 is missing. Therefore, the part of the welding part 28 close to the welding part 29 is not welded, and since both ends of the sliding plate 25 are missing, both ends of the welding part 29 are not welded, and when air blowing, These unwelded parts serve as air passages, and the mold-clamped parison 27 expands to its full cavity, and the unwelded parts become the missing parts of the reinforcing plate.

In this case, it is preferable to cool the blow mold 21 to solidify the molded product.
A cooling water passage 30 is provided in the separating mold within a range that does not interfere with the arrangement of parts 4 and 25.

FIGS. 8 and 9 show another embodiment of the manufacturing method of the present invention, in which sliding plates 24 and 25 are provided on one side of the blow mold 21. An automobile partition plate can be formed in the same way as when sliding plates 24 and 25 are provided on both sides.

As described above, in the synthetic resin automobile partition plate according to the present invention, a reinforcing plate is integrally provided between the top plate and the bottom plate, and the shape of the reinforcing plate can be formed in any manner, and the direction of the reinforcing plate can also be changed. Since it can be changed in any way depending on the shape of the main body, it has strong bending strength and light weight even if it is thin, and if necessary, the type of synthetic resin, color, or surface pattern can be freely selected to improve the aesthetic appearance. Since an excellent product can be obtained, it can be suitably used as partition plates in various parts of an automobile.

[Brief explanation of drawings]

Figure 1a shows a spare tire loaded in the trunk or luggage space of a car, and Figure 1b shows a storage area for luggage, etc. with a bottom partition plate placed above the spare tire. Figure formed, 2nd
Figure a shows a state in which the glass hatch of the hatchback is opened and the upper partition plate is opened in conjunction with this, opening the luggage space. Figure 2 b shows the
FIG. 3 is a diagram showing a state in which the glass hatch is closed and the upper partition plate covers the upper surface of the luggage space in conjunction with it, forming a flat space at the rear of the seat. FIG. 4 is a partially cutaway perspective view showing details of part A in FIG. 3; FIG. 5a is a longitudinal section showing a parison inserted between the split molds. figure,
b is a diagram in which a part of the parison is crimped by pushing out the sliding plates facing each other in a, and c is a diagram in which the sliding plates in b are returned to their original positions and the parison is expanded to the full cavity by air blowing. 6 is a perspective view showing the crimped state of the parison when the sliding plate is extruded from both sides of the blow mold, and FIG. 7 is a diagram showing the reinforcing plate formed.
Fig. 6 is a perspective view showing the formation state of the reinforcing plate formed by parison crimping, and Fig. 8 is a perspective view showing the crimping state of the parison when a sliding plate is provided only on one side of the blow mold and this is extruded. 9 are perspective views showing the state of formation of the reinforcing plate formed by the parison crimping shown in FIG. 8. 1... Partition plate, 5... Top plate, 6... Bottom plate,
7... Side wall, 10, 11... Reinforcement plate, 10a, 1
1a...Deletion, 21...Blow mold, 21a,
21b... Molds on each side of the split mold, 22...
Mold fixing plate, 23... Air nozzle, 24, 25...
...Vertical and horizontal sliding plates, 26... Hydraulic means, 27...
...parison, 28, 29... welded part of parison,
30...Cooling water channel in the mold.

Claims (1)

[Scope of Claims] 1. A hollow plate body formed by air blowing a synthetic resin parison, and a part of the parison integrally formed inside the main body over an upper surface plate and a lower surface plate, provided at a required position. 1. A synthetic resin automobile partition plate comprising a required number of reinforcing plates, the reinforcing plates having a cutout portion that allows communication between all the insides of the main body. 2 Insert the synthetic resin parison into the blow mold and clamp it, and use the required number of sliding plates provided at the required positions on one or both sides of the blow mold to clamp the side walls of the parison as described above. Parts of the parison are crimped so that all the insides of the parison communicate with each other, and then air blowing is performed to form a main body made of a hollow plate.At the same time, the crimped parts are formed into a plate shape and a part of the parison is formed inside the main body. A method for manufacturing a synthetic resin automobile partition plate, comprising forming a required number of reinforcing plates at required positions.