JPS5928405B2 - Molding mold for irregularly shaped laminated wood - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mold for forming irregularly shaped laminated wood that can perform sharp bending.

The structural soil of irregularly shaped laminated timber is characterized by being a laminated board with multiple layers of real roots and having a bent part, but this bent part is formed by bending at a strength lower than the bending strength of the real roots.
However, since tension remains in the bent portion, springback occurs, and the angle of the bent portion fluctuates due to this springback vc, making it impossible to obtain a predetermined sharp bend.

The present invention relates to a mold for molding irregularly shaped laminated timber that solves the above problems, and by applying this molding mold, it is possible to obtain irregularly shaped laminated timber having sharp bends.

Hereinafter, this invention will be explained based on the drawings of the embodiments.

5. FIG. 1 is a perspective view showing an example of a deformed laminated material obtained by using the mold for forming deformed laminated material of the present invention.

First, the shape of this irregularly shaped laminated timber will be explained. side piece 1,
1 Formed at both ends of the cough piece 2 to form a substantially U-shape, having a step 3 above and below one side piece 1, 10 having an outwardly recessed curved surface 4 between the steps 3, 3; Furthermore, the other side piece IVC is formed by vertically connecting outwardly recessed curved surfaces 4, and the bottom side 2 and the side piece IV
The molding die shown in FIGS. 2 and 3 is used to shape the bent portion 5 formed by C into a sharp shape. FIG. 2 shows the state at the beginning of molding 15, and FIG. 3 shows the state just before the end of molding. In the figure, 6 is a male type, 7 is a female type, and 8 is a side core.The female type 7 is connected to a center part 9 and a side part 10 attached to the center part 9VC so that it can be raised and lowered, and the male type 6 and the female type are connected to each other. A substantially U-shaped molding chamber 11 is formed from the mold T20 as shown in FIG. At the start of molding, the side part 10 attached to the center part 9 rises to form a recess 19 between it and the center part 9, and as mold clamping progresses, the side part 10
To avoid contact damage to the pressurized body 2513, which is constructed by laminating a plurality of adhesive-attached nuts 12, the side part 10 attached to the center part 9 is lowered to form a male type T just before the end of molding.
Pressure is applied to the inside and outside of the pressurized body 13 to shape it. On the other hand, male type 6
is provided with an ejecting pin 1530 that protrudes and retracts while resisting pressure up to the same level on the forming surface 14 of the male mold 6. At the start of molding, the ejecting pin 1530 protrudes from the forming surface 14 and lifts the pressurized body 13. A space 16 is formed between the male molds 6, and just before the end of molding, pressure is applied as the center part 9 of the female mold T descends and sinks into the male mold 6, reducing the space 16 at the start of molding. . Note 3
Reference numeral 511 is a spring for operating the ejector pin 15 so as to protrude and retract while resisting pressure, and this spring is embedded in the hole 18 into which the ejector pin 15 is inserted. FIG. 4 shows the mold clamping state at the end of molding, the ejector pin 15 is inserted into the male mold 6, the female mold 7 and the male mold 6 apply contact pressure to the inside and outside of the pressurized body 13, and the side core 8 and Pressure object 1 with male type 6
Contact pressure is applied to both ends of 3. A plurality of these ejecting pins 15 are provided at intervals.

According to the above-described molding die, the bent portion 5 is shaped after the side piece 1 is shaped while the pressurized body 3 is lifted by the ejector pin 15 that comes and goes in and out against pressure. When the portion 5 is shaped, the tensile stress has been removed, so the formed irregularly shaped laminated material has no spring back, so the bent portion 5 can be shaped into a sharp shape.

As described above, the present invention includes a molding die FlC made of cross-shaped laminated wood having a bent part 5 formed from a bottom piece 21 and a side piece 11, which is attached to the center part 9 and to the center part 9 so as to be movable up and down. A female mold 7 consisting of an attached side part 10 and this female mold 7VC
An ejecting pin 15 is formed from a pair of male molds 6, and is provided on the forming surface 14 of the male mold 6 so as to be able to come out and retract from the forming surface 14 of the male mold 6 until it is flush with the forming surface 14. Remaining disappointed,
While the side part 10 is descending, the side piece 1 is shaped, and the side part 10
The structure is such that a substantially U-shaped molding chamber 11 is formed in which the bent portion 5 is shaped by mold clamping of the center portion 9 as the center portion 9 descends, and tension remains in the bent portion 5. Since this is not done, spring packs do not occur.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a U-shaped deformed laminated timber shown as an example of the object of the present invention, Fig. 2 shows the mold clamping state at the start of molding, and Fig. 3 shows the mold clamping state immediately before the end of molding. FIG. 4 is a sectional view of the main part showing the mold clamping state at the end of molding. 6...male type, 7...female type, 11.
...Molding chamber, 14... Shaping surface, 15...
...Eject pin.

Claims (1)

[Claims] 1 In a mold for molding irregularly shaped laminated wood with a bent part 5 formed from a bottom piece 2 and a side piece 1, a center part 9 and a center part 9 are formed.
It consists of a female mold 7 consisting of a side part 10 that is attached to and can be raised and lowered freely, and a male mold 6 that is paired with this female mold 7. The ejection pin 15, which is provided so as to be freely protrusive and retractable until it is flush with the shaping surface 14, shapes the side piece 1 while the side part 10 descends while lifting the pressurized body 13, and as the side part 10 descends. A mold for molding irregularly shaped laminated material, characterized in that it has a structure that forms a generally U-shaped molding chamber 11 in which the bent portion 5 is shaped by clamping the center portion 9.