JPS5926215A - Prefoam molding machine - Google Patents

Abstract

PURPOSE:To decrease the cost of the titled equipment, by a method wherein the inside of a screen is divided by a plurality of partitions and each divided part is absorbed one after another so that only required part for absorption is absorbed for decreasing the capacity of an absorber. CONSTITUTION:The inside of a screen 3 is divided into chambers 3A-3H by a plurality of partitions 4. An absorption box 8 for decreasing the internal pressure of the screen 3 is provided at each chamber facing an opening 1a of a base 1 (for example, the pressure in the chambers 3C and 3D can be lowered more than the others) so that each chamber can be absorbed individually one after another. Consequently, a small fan instead of a large fan required for prior art in order to absorb all screens at a time can be employed as an absorption fan 8 connected to the absorption box 8. The capacity of the absorber and hence the cost of installation concerned can be decreased.

Description

[Detailed description of the invention] It is.

Currently, as a preform molding method within the reinforced plastic (F[?1.P) molding method, the Briform molding machine method,
There are the friform cold press method, the friform resin injection method, etc., but these differ only in the latter half of the molding process;
The same technology is used for Culm 1.

The preform technology currently in use is that a reinforcing material such as glass fiber is shaped into the shape of the product using a binder in a preform molding machine, and then a human body is placed in a mold. There is a method in which a liquid resin (in this case, unsaturated polyester is often used) as a matrix is infiltrated into the gap between the reinforcing material layers and hardened.

The briform molding machine e from IE was equipped with a briform molding screen consisting of a perforated plate with an external shape that matched the shape of the molded product, and a suction surface was installed to reduce the pressure inside the screen. While suctioning from M
The reinforcing materials are layered and then heated air is blown to bond the reinforcing materials to each other in a predetermined shape.

In such conventional briefmem molding machines, suction is required to heat and dry the reinforcing material layer laminated on the entire surface of the screen, and to prevent the reinforcing material from losing its shape due to adhesive kinks. Therefore, a thick suction fan for the preform was required. A hot air generator is used to supply hot air towards the screen surface since drying is required. It is necessary.

Well, he had a problem with the cost including fever and I11 being 11C.

The invention of wood will solve the above problem /
A large-capacity suction fan and a dryer)
1=Without the need for equipment, d () is divided by a plurality of partitions υ plates, and each divided part of the screen is numbered (7) so that it can be sucked in.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1C and 1D.

In the present invention, an example for forming a threading glyph form is not shown.
f',' 1 animal 1 ζ, then 1t; lScree・
40 pieces inside 3 (C arranged) 1. Multiple cut plates, 5 i-; J, glass (A11.!!11
Roving made by F, placed on Hijikata of 6C21 Tsuclean Otsu in the direction intersecting with the snoid force direction of IL table 2? ]・
Enoki white fishi='nari-Hing Katsuka, 71z:l
: Move in the same direction as I-pink I-6 and use a 1.7 gray gun with a 1J discharge to adjust the screen to the shape of the product.
T L-, Banochino'g metal mataban; J, ii' [
+, l' Consisting of a molded product, 1.11 itself has a multi-shell hole 3
N1 is the one with the drilled heart J', so it's off. So”shi-C
The inside of the screen filter is divided into N number of partitions, 11, 38 rooms C, 38 rooms z13. 30゜31J, I et al.
'Ri i吃', 30. ro 11 ni 1 eshirira) 1,
I'm here.

1 loss Hikita No. 8, 1 to depressurize the inside of the screen
, Separated by IJJ board 3, I'
If 8I is in Figure 1, room 6C is in room I, and 3D is in the other room. They are provided facing the opening 1a of the base 1 so that they can be suctioned one after another. Therefore, when installed connected to the suction surface 8, one small fan can be used for the suction fan 9 instead of the large fan that conventionally required 7 hours to suction the entire screen.

For example, it attracts a screen area of 17n2. Kamoai,
Conventionally, one or two fans of 30 to 50 RP were required, but with the invention, only one fan of 10 to 20 RP is required.

Soshi 1. “[The above suction surface 8 and the small 1 suction fan 9
Therefore, as the binder 10 and 7 that is sprayed from the spray gun 7, it is preferable to use a thermal spray binder or a solvent-based binder that provides adhesive strength in a short time at room temperature. . TJ hot melt adhesive can be used as a thermal spray binder. This type of binder has a solid content of 100% and is made of thermoplastic resin such as polyester, polypropylene, etc., and is melted at about 140 to 220°C and pumped.
It can be blown with hot air. This binder (I:J
Depending on the conditions, the -CIre fibers If1 may be sprayed and entangled with the laminated glass fibers. This thermal sprayed binder develops an adhesive force of +-11 when cooled.

On the other hand, the thermal spray type binder is one that can be dried at room temperature and is suitable for DJ use, and is made of polyolefin yarn with a solid content of 30% or more and a polyester-based styrene monomer solution. When using the binder, it is preferable to adjust the blowing conditions to form the binder into a fibrous shape so that it is not entangled with the glass fibers. /
FkiVC increases viscosity d-, ta, tends to become conical (
5,00 (] c, p, s or more'').

The roving cutter 6 is composed of a cutter part consisting of a roll 11, a rubber roll 12, and a pressing roll 13, and a small blower (not shown), and is used to blow the glass fiber 14 cut by the small blower. This is to ask questions.

The blowing speed is: i+Tt usually 200~3 Q Q fn
Do this on /3.

Note that if the product requires sand in a simple shape, it is preferable to use a screen in which the table 2 is of a sliding or rotating type as described above. In the case of a rotary type, the screen rotates as shown in FIG. Next, it passes over the suction box 16.

Brifono using such a preform molding machine,
To make this, the suction fan 9 is operated to draw suction in the direction of arrow B in FIG. Perform the necessary amount of suction and remove other parts.
-1 very small suction and cut) 16 crow fibers 1
4 and binder 10 on the surface of Nuclean 6.
Ru. By adjusting the viscosity of the binder, the shape of the sprayed binder changes from particulate to fibrous, so the binder often gets entangled in the glass fiber layer suctioned and laminated on the surface of the screen 3, causing the fibers to become tangled. Less is lost through the layers. In turn, the yield of binder for preform molding is improved. Then, Boople 2 moves 7, and L7-
By reciprocating the hinge cutter 6 and the streak 1/- gun 7, a desired preform with the shape of the glass fiber λ (one layer has been formed and the L1 screen B) is sequentially obtained.
Ru.

In addition, in the present invention, as shown in FIG.
The binder 10 can be blown by forming a loop with a diameter of 00+++ m (= J GEL 1117). In addition to this, the glass fiber is used in a continuous state without being cut - J'
, If it is, there is no +lu ir& of \ outside the screen 3, and the yield is good. Furthermore, compared to the cut fiber gIL, the glass fiber layer that has been suction laminated δi is slightly larger than the cut fiber gIL, and is put into the mold. It is evenly distributed in one piece (thickness direction) in the duck mold. In addition, it has a high elasticity and curly texture,
Does not wrinkle easily in the mold. Since it is dispersed in a loop, there is no directionality in the strength. Further, there are advantages such as matte breakage does not occur due to resin flow within the mold.

Therefore, there are effects such as improving the strength and %l property of the molded product.

According to the present invention as explained above, only a predetermined amount of suction is applied to the part of the reinforcing material such as glass fiber that needs to be adsorbed onto the screen, and a very small amount of suction is applied to other parts. The capacity of the machine can be reduced and equipment costs can be reduced. Furthermore, as a binder, if you use a solvent type or thermal spray type binder that has adhesive strength when heated,
Since the drying hot air generator does not peel off, equipment costs can be further reduced.

[Brief explanation of drawings]

FIG.
The figure is a flat diagram without showing a screen portion that is J% different from that of FIG. 1. FIG. 6 is a schematic diagram showing another embodiment of the present invention. )...Base 2...Screen @(Δ
Table 3... Screen 4... Partition plate 5... Roving 6 - Roving cutter 7... Spray gun 8... Suction surface 9...
・Suction fan patent applicant: Nihon Nihon F-Textile Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 8

Claims (1)

[Claims] (1) Blow a reinforcing material such as glass fiber and a binder together on a screen made of a perforated plate or the like having an external shape that matches the shape of the product, reduce the pressure inside the screen, and suction and laminate the reinforcing material on the surface of the screen. In a preform molding machine that molds a preform with a screen shape of υ, the inside of the screen is divided by a plurality of partition plates, and the preform is made so that suction can be sequentially applied to each partitioned part of the screen. Molding machine.