JPS62184822A - Molding of unit panel for sectional storage tank and insert positioner for execution thereof - Google Patents

Abstract

PURPOSE:To keep the external appearance of a unit panel good and at the same time prevent the strength of the panel from lowering by a method wherein the position of an insert is fixed at a certain fixed position with positioners and simultaneously the positioners are integrally molded as some substantial parts of the unit panel. CONSTITUTION:Under the condition that both a top force 28 and a bottom force 26 are used, a plurality of glass mats and sheet molding compounds (SMC) as molding material are set onto the bottom force 26 in the state that an insert 24 is pinched between them at their middle position. At this time, positioners 32 and 34 are fitted in fitting holes and bolt holes, which are bored in advance on the insert 24. In addition, at this time, the positioners 32 and the like are in the state afloat from the bottom force 26. When the top force 28 and the bottom force 26 are closed together in the state as just mentioned above, the molding material is flowed by means of the pressing force of the forces so as to fill all the corners of a cavity 30. Because the respective abutting surfaces of the prospective positioners 32, 34 and 36 are brought into the state being abutted against the inner surface of the cavity 30 so as to restrict the insert 24, no positional shift of the insert develops.

Description

[Detailed Description of the Invention] 3. Total 411 Descriptions of the Invention (Fields of Industrial Application) This invention is of the MI X'L type! Resin unit panel for 6° tank.

In particular, the present invention relates to a forming force method for a $0 panel with a built-in insert and a positioning tool for positioning the insert in a fixed position during forming.

(Conventional Technique i#i) According to No. 7, a storage tank is assembled and drained by carefully joining a plurality of resin unit panels.

When forming a storage tank, this rli panel may be deformed by the pressure of the liquid stored inside it, and this is particularly likely to occur in large, vertically rectangular panels that have been developed in recent years. For this reason, in such unit panels, reinforcing ribs are provided in the width direction of the panel in areas that are structurally weak points, and long "plate-shaped metal parts" are installed inside the ribs.
It is being considered to embed ``cert.''

(Invention or problem to be solved) However, when forming this unit panel into plenue.

There was a problem that the inserts that were preset in the cavity for rib molding were easily misaligned due to the flow of resin during mold clamping. Therefore, if the insert is misaligned, the inner may be exposed on the panel surface, which may impair the appearance of the panel.

Additionally, if the insert is misaligned, the J-shaped resin that envelops it becomes thinner, and stress concentration due to the liquid storage pressure is more likely to occur in this thinner area, which can reduce the strength of the panel. There is a risk of inviting

(First means for solving the problem) The first means for solving the problem is related to a method of molding this resin unit panel, and its gist is that the resin unit panel is set in the rib molding cavity. a positioning tool is placed in a space between the inserted insert and the inner surface of the cavity, separated from the mold;
The positioning tool defines the position of the insert at a predetermined constant position during mold clamping, and the positioning tool is integrally molded as a part of the unit panel.

(Operation of the first solution) For thin molded products such as unit panels for five-assembly type storage tanks, if the insert is positioned using a positioning box, it is possible to avoid complicating the structure of the mold. do not have.

Therefore, in the present invention, the positioning tool is housed almost entirely within the cavity in a state that is separate and independent from the mold, and the positioning tool is integrally molded as a part of the unit panel when molding the unit panel. This makes it possible to accurately position the insert at an appropriate position without complicating the mold structure and using a conventional mold as is. In addition, by correctly positioning the insert, the appearance of the unit panel is maintained in good condition, and the problem of thin-walled portions forming in the resin portion, which reduces the strength of the panel, is also resolved.

(Second stage-L for solving the problem) The second solution stage F of the present application relates to the insert positioning tool used when implementing the above molding method, and the gist thereof is as follows. The positioning tool has a block shape of a size that is approximately accommodated in the space between the insert and the inner surface of the cavity, and has a support surface that supports the insert against the pressing force during tightening, and a support surface that is arranged on the inner surface of the cavity. This is because an abutting surface is formed which abuts to perform a positioning action.

(Operation of the second solution) By using such a positioning tool, the above-described molding method can be suitably carried out.

For example, if you use one or more of the above-mentioned positioning tools and place each contact surface in the direction you want to determine the position, for example, the thickness direction of the rib, the longitudinal direction, the width direction, etc., the mold clamping tool can be used. At times, the insert is simultaneously positioned in the three directions mentioned above, that is, three directions perpendicular to the rib, and its position within the cavity is three-dimensionally determined. In this case, it is also possible to provide a plurality of abutment surfaces on the -. number of positioning tools and position the insert in a plurality of directions using a small number of positioning tools.

This positioning tool positions the insert by coming into contact with the inner surface of the cavity during mold clamping, and is separate from the mold. Therefore, when the molded unit panel is removed from the mold, the positioning tool positions the insert. It becomes a part and separates from the mold.

In addition, this positioning tool includes an insert in a block-shaped member, a support surface having a shape corresponding to the shape of the inner surface of the cavity,
It has the advantage that it can be constructed simply and inexpensively by simply providing a contact surface.

(Example) Next, each example of the molding method of the present invention and the positioning tool used for carrying out the method will be described in detail based on the drawings.

In Figure 2, 10 is FRP with a width of 1m and a height of 2m: %J
It is a rectangular unit panel. This long sword-shaped large panel 10 reduces the number of panels required for assembling a storage tank (conventionally, square panels, for example, 1 m each in length and width) are used.
This method has been developed in recent years under [1], which reduces the panel joining work (1) and eliminates the need for reinforcing rods to support the panel joint intersections from inside the storage tank. It is.

The panel 10 has a middle part formed as a 1bj/projection part 12, and both upper and lower parts thereof formed as flat plate parts 14 and 16. The bulging portion 12 has an arcuate cross section and bulges out toward the surface, and is designed to be swamped by the pressure of the liquid stored inside the storage tank. On the other hand, the flat plate portion 14.16 is a flat plate-shaped portion with flat front and back surfaces, and the liquid storage intake 11.
Flanges for the outlet can be removed.

A flange portion 18 is formed on the outer peripheral edge of the panel 10 and stands up from the panel surface. The flange portion 18 is
This is a part that is fastened to another panel fledge part using a bolt cap fastener when assembling the storage tank, and bolt holes are drilled at an appropriate number of locations.

A lip 22.23 is formed at the boundary between the bulge 12 and the flat plate 14.16 below L, and this boundary, which is the weak point of the structure t, is reinforced. The lips 22 and 23 are formed by raising the boundary portion to have a trapezoidal cross section on the surface side, and as shown in FIG. 3, an insert 24 in the form of a long plate is embedded inside.

The first UA is a cross-sectional view of the forming apparatus for forming the unit panel 1o, taken along the lip 22. It includes a cavity 30 for lip molding.

Reference numerals 32, 34, and 36 in the figure denote positioning elements for positioning the insert 24, and their configurations are shown enlarged in FIGS. 4 to 6. First, positioning tool 32
teeth.

As shown in FIG. 4, it is a cylindrical block member, and is made of a hardened FRP material. A protrusion 36 is formed on the top surface of the head, and this protrusion 36 is fitted into a fitting hole previously formed at a specific portion of the longitudinally intermediate portion of the insert 24. That is, by fitting this protrusion 36 into the fitting hole of the insert 24, the relative position of the positioning tool 32 with respect to the insert 24 is defined. This positioning tool 32 has an insert support surface 38 and a contact t'U surface 40 formed in opposite directions, so that when the mold is clamped in forming 528. The contact surface 40 supports the cavity 30
The insert 24 can be positioned by abutting against the inner surface of the insert 24. Furthermore, this positioning tool 3
What is the height of 2?

The height is the same as the distance between the lower surface of the insert 24 and the inner surface of the cavity 30 at the positioning position.

On the other hand, the positioning member 34 is for positioning the fledge portion 48 of the insert 24, and is also made of dry-hardened FRP material. This positioning box 34 is
As shown in FIG. 5, they form a rectangular pair, and a protrusion 42 is formed on the negative side. The protrusion 42 fits into a bolt hole previously drilled in the insert flange 148, and functions to define the relative position of the positioning tool J4 with respect to the insert 24. In this positioning box 34, the surface on which the protrusion 42 is formed serves as a support surface 44.

The back surface thereof is a contact surface 46.

In addition, FIG. 6 is for positioning the lower end surface of the insert flange portion 48, and the contact surface 50 facing opposite to the support surface 48 is shown as (T).

Next, a procedure for forming the tp position panel IO while positioning the insert 24 using such positioning pincers fJ: 32, 34, and 36 will be explained.

First, the upper mold 28. With the lower mold 26 open, a plurality of molding materials such as glass molding materials and SMC (sheet molding compound) are set on the lower mold 26 with an insert 24 sandwiched between them. At this time, positioning tools 32 and 34 are fitted into the fitting holes and port holes formed in advance in the insert 24.
The positioning box 32 etc. is raised from the lower mold 26 7fj
It becomes. This is because, before the mold is clamped, the thickness of the molding material between the insert 24 and the lower mold (the inner surface of the cavity 30) is thicker than that of the molded product. In this state, upper mold 2
8 and the lower mold 26, the molding material flows under the pressing force and fills every corner of the cavity 30. With the conventional forming force U, the insert 24 would be swept away at this time, causing a crease in the position 1", but according to this υ, when tightening the clamps 32, 34, at each position. Each contact surface of 36 is the inner surface of cavity 30
Since the insert 24 is restrained by the abutting shape S, such positional deviation will not occur. Once the molding material has flowed and hardened, the mold is opened and the mold is removed. Unit panel lOgazu as a product!
I get caught. At this time, each positioning tool 32°3↓, 36 becomes a part of the unit panel 10 and is separated from the mold 28, 26. Moreover, since these positioning tools 32, 34, and 36 are all made of the same FRP material as the molding material, they appear to be fused with the unit panel 10 as part of the unit panel 10, spoiling its aesthetic appearance. Never.

Note that this positioning tool can be configured in various other forms. Figures 7 to 7:jS9 show the Jt integrated side. The positioning tool 52 in FIG. 7 is for positioning the outer surface of the flange portion 48 of the insert 7, and includes a protrusion 54 that fits into a fitting hole formed in the flange portion 48;
A support surface 56 that supports the outer surface of the flan portion 48 and a contact surface 5
8. The contact surface 58 also functions as a guide surface. The guide surface (contact surface 58) is such that when the 7 flange portion 48 opens slightly outward, that is, if the upper mold 28 is closed as it is, the outer surface of the flange portion 48 may come into contact with the upper mold 28 and damage it. When it is put away, it comes into contact with the upper die 28, thereby bending the flange portion 48 inward as the upper die 28 descends. Then, with the 1-type mold 28 completely closed, the outer surface of the fledge portion 48 is positioned at the stereotactic neck.

Next, the positioning tool 60 shown in FIG. 8 positions the flange portion 48 from two directions: a support surface 62.64 that supports the flange portion 48, and an abutment surface 66.68 that abuts the inner surface of the cavity 30. You're right. Furthermore, this positioning tool 6
0 indicates a state yE in which the molding material is not in contact with the insert 24 at the stage when the insert 24 is set in the cavity 30.
It is in. When the insert 24 is lowered at the same time as the mold is clamped, the support surfaces 62, 64 contact and support the insert 24, and the single contact surface 6668 positions it.

Next, No. 9- shows a positioning tool 70 for positioning a part of the corner of the insert 24.
．． 74.76 and a support surface of 78°80.82.

Although the above example shows an example in which the position clamp is formed of a block-shaped member made of FRP, it is also possible to configure this with a port 86 as shown in FIG. 10. porto 8
6 is screwed into a female threaded hole formed in the insert 24, and the insert 24 is positioned by protruding its tip into the recess of the cavity 30 using the mold clamp IIv. In this case, the top surface 90 of the port 86 and each surface of the screw thread serve as supporting surfaces, and the tip surface and its peripheral surfaces 100 and 102 serve as contact surfaces. This port 86 is integrally molded as a part of the unit panel 10 and then removed from the unit panel 10. In this case, a hole is left in the panel 10 at the rlt level, but this hole can be repaired by filling it with FRP material.

Although the embodiments of the present invention have been described in detail above, the present invention can be implemented in other ways.

For example, when positioning the insert 24 using the method shown in FIG. 10, a pin may be fixedly provided on the insert 24 instead of the bolt 86.

In this case, after molding, the tip of the pin is connected to the unit panel 10.
This protruding portion can be brought into contact with νJ by an appropriate means.

Furthermore, among the positioning tools shown in FIG. 1, it is possible to omit the positioning tool that supports the intermediate portion of the insert depending on the case, and it is also possible to use other types of positioning tools to position the insert. Both are possible.

(Effects of the Invention) As detailed above, the first invention of the present application is to set the positioning tool in the housing shape E1 in the cavity when molding the rli panel, and to integrate it as a part of the unit panel. It is designed to be molded.

According to the present invention, it is possible to properly and reliably position the insert without complicating the structure, thereby maintaining a good appearance of the panel and preventing low strength.
Get the effect you want.

Moreover, in the second invention of the present application, the positioning tool is formed into a block shape, and a support surface and an abutment surface are formed on this.

By using such a positioning tool, the above molding method can be suitably carried out. Moreover, this positioning system has a simple structure and can be provided at low cost. It has many advantages.

[Brief explanation of drawings]

Fig. 1 is a main part view i'''i showing the implementation state of a unit panel forming method which is an embodiment of the present invention together with a forming apparatus. Fig. 2 is a perspective view showing a unit panel as a molded product. 3 is a cross-sectional view of the main part of the rope shown in FIG. 2. FIGS. 4 to 6 are perspective views of the positioning tool in FIG. 1, and FIGS. 7 to 9 are Fig. 10 is a perspective view of another embodiment of the positioning tool. Fig. 10 is a cross-sectional view of main parts showing another embodiment of the molding method of the present invention together with the insert positioning tool. 10: unit panel, 24: insert 32 .34.36,52,60.70: Positioning Jt' 38 , 44 , 48 , 56 , 62 , 64 , 7
8. 80.82,90. Support surfaces 40 , 46 , 50 , 58 , 66 , 68 , 7
2. 74.76.100,102. Contact surface 86: Porto 1 Figure 4 Figure 9 Figure 10

Claims (4)

[Claims] (1) A unit panel forming method in which a resin unit panel for an assembly type storage tank is formed into a rectangular plate shape and equipped with reinforcing ribs extending in the width direction, with a longitudinal plate-shaped insert embedded in the ribs. A positioning tool is arranged in a space between the insert set in the rib molding cavity and the inner surface of the cavity in a state separated from the mold, and the positioning tool is used to control the positioning during mold clamping. A method for forming a unit panel for an assembly type storage tank, characterized in that the position of the insert is defined at a predetermined constant position, and the positioning tool is integrally molded as a part of the unit panel. (2) When molding a resin unit panel for a prefabricated storage tank that has a rectangular plate shape and has reinforcing ribs extending in the width direction,
A positioning tool for defining a longitudinal plate-shaped insert to be embedded in the rib at a predetermined constant position, the positioning tool having a block shape having a size that is approximately accommodated in the space between the insert and the inner surface of the cavity. , and a unit for an assembly type storage tank, characterized in that a support surface that supports the insert against the pressing force during mold clamping, and a contact surface that abuts the inner surface of the cavity and performs a positioning action are formed. Panel insert positioner. (3) The unit panel is made of FRP, and the positioning tool is formed of pre-hardened FRP, and the positioning tool is integrally fused as a part of the unit panel when forming the unit panel. An insert positioning tool according to claim 2. (4) The positioning tool is a bolt screwed into the insert, and after being integrally molded as a part of the unit panel, it is removed from the unit panel by unscrewing. The insert positioning tool described in Section 2.