JPS59212679A - Drier for veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The device of the present invention is a veneer veneer dryer that can reduce the thickness reduction and uneven thickness of veneer veneers after drying, reduce the power required during drying, and eliminate the drying tray. This is related to V.

Conventionally, when using VC to dry veneer veneers, multiple sets of upper F pairs of rolls are installed in the conveying direction, or endless wire mesh is rotated in pairs up and down to dry all the veneer veneers to be dried. A conveyance path was formed for clamping and conveying the material, hot air was circulated inside the dryer, and the veneer veneer was indirectly heated and dried using an air medium while it was being conveyed.

However, when the conveyance path is formed by rolls, the veneer veneer being sandwiched and conveyed tends to be compressed due to the pressure of the rolls' own weight, and due to the deflection in the longitudinal direction of the rolls, the veneer veneer is pinched and conveyed. Since the compression ratio tends to vary in the direction of the veneer, the veneer veneer after drying is likely to have thickness reduction 9 and thickness unevenness. At the same time, since the veneer veneer is transported while being transferred between rolls, the fiber direction must be parallel to the transport direction.
Moreover, the length of the veneer veneer has been subject to many restrictions, such as the length being required to be at least equal to the distance between adjacent rolls.

This may be due to over-printing of the veneer veneer between the rolls and adhesion of the resin contained in the veneer itself to the rolls, or due to deterioration in the properties of the veneer veneer in recent years. The veneer veneer was rolled and cracked, cracked, etc.
9. This has resulted in a low operating rate and low filling rate of the veneer veneer dryer.

If the conveyance path is an endless wire mesh, the hot air supplied to the plywood veneer during conveyance will be circulated in the direction of conveyance and in the cross direction. In order to prevent
Not only did this result in major damage to the equipment, equipment costs also increased, and the power required increased due to the air resistance that was emitted from the wind duct onto the veneer veneer.

In view of steaming, it is an object of the present invention to provide a complete device which eliminates the drawbacks of the conventional ones described above. In addition to the blower τ, the infant heating device is rearranged on the other side to form a ventilation passage, and it is placed in the longitudinal section of this ventilation passage! Directly connect the suction duct and blow duct
The heating section, which communicates with each heating section located at The upper F is characterized by being equipped with a plurality of heat dissipation pipes arranged at arbitrary intervals in the longitudinal direction.

The present invention will be described below based on embodiments shown in the accompanying drawings.

First, the configuration of the first embodiment will be explained.

Air seal sections 2, 2' (i7 sections 4, and cooling sections 5) are installed on both sides in the longitudinal direction of a required number of heating sections 1, each of which has an outlet 6.

Inside the heating section 1 extending from the carrying-in port 3 to the carrying-out port 6, there is a conveyor belt 7 made of wire mesh, wire mesh, etc.
゛The conveyance path 9 for holding and conveying the veneer veneer 8 metal plates can be arranged in multiple stages in a pair.
3 $3, folded VC in a 3-shaped shape, 11 pieces of veneer veneer from the veneer supply part 10, 8 pieces of veneer veneer
It is being transported in the direction of arrow A.

111 In each stage of the endless conveyor belt 7, there is a - section in the longitudinal direction.
The spacing device is equipped with a roll 12, and the end conveyor belt 7
It is used for driving, preventing vertical 'n-F collisions, and preventing meandering.

Furthermore, a plurality of heat dissipation tubes 13 using steam, hot water, etc. as a heat source are arranged above the conveyance path 9 of each stage at arbitrary intervals in the longitudinal direction C'. The top and bottom of Route 9 are equipped with deadly weapons.

That is, as shown in FIGS. 3 and 4, the first and second heat dissipation tubes 13 are placed in the upper conveyance path 9, and the heat dissipation tubes 13 are placed in the middle conveyance path 9.
'iThe third and fourth stage heat dissipation pipes 13 are provided, and furthermore, the fifth and sixth stage heat dissipation pipes 13 are provided in the lower transport path 9, and the heat dissipation pipes 13 that form the upper and lower pairs in FIG. The tubes 13 are in the same phase in the vertical direction gc! In contrast, the one shown in FIG. 4V is one in which the phases are shifted from each other in the upward direction and arranged in a staggered manner.

A pair of hot air circulation blowers 15 are mounted on a support stand 14 at the upper part of the heating section 1 near the entrance 3, and on the other side are steam, hot water, etc. Four heating machines 16 each serving as a heat source are installed to form a ventilation passage 17, and the hot air circulation blower 15 is operated by driving a prime mover (not shown).
The hot air is circulated in the direction of arrow B in the ventilation passage 17.

A suction port 18 is fully opened on both sides of the heating section 1 located directly below the pair of hot air circulation blowers 15, and a suction duct 19 is disposed in this opening to communicate with the ventilation W&17. 6 side heating section 10
The air outlet 20 opened on both sides has a air duct (air duct) 2.
1 is placed in communication with the ventilation passage 17, and the hot air generated in the ventilation passage 17 is circulated to the heating section 1. Further, above the ventilation passage 17, there is installed an exhaust pipe 28 equipped with a damper 22 for discharging all the moist air.

Next, in the second embodiment shown in Fig. f; 5, the conveyance path 9 of the first embodiment had a multi-stage folded configuration, whereas the conveyance path 9 was of a direct type for each stage. Yes, upper conveyance path 9
is a continuous plywood veneer 8, and the 17-stage conveyance path 9 is
Cut to size or cut to size veneer veneer 8 Complete drying 6
The manner in which it can be done is shown.

Further, in the third embodiment shown in FIGS. 6 and 7, due to differences in material thickness, size, etc. of the veneer veneer 8 to be dried,
Furthermore, when increasing the number of heating sections in order to increase the number of dried sheets, it may be difficult to process the humid air due to the increased volume (7), or the increased number may exceed the allowable output of the hot air circulation blower 15. This is a so-called double air circulation type dryer, which doubles the number of units of dryer that can be used when the limit is exceeded.This is a single plywood dryer shown in the first failed example. Then, connect the second veneer veneer dryer by replacing its starting end, and arrange 6 stages of VC upper and lower endless conveyor belts 7.
Two conveyance paths 9 having a step-folded structure are formed on the top.

Furthermore, even though the embodiments of both the second embodiment and the third VC embodiment are different from those of the first VC embodiment, the individual parts are the same, so the same reference numerals will be used to refer to them. The entire explanation will be omitted.

Next, the effect will be explained.

In the first to third embodiments, in the ventilation passage 17 in the upper part of the heating section 1, air is circulated from the suction duct 19 by the hot air circulation blower 15 in the direction of arrow B, and the heating machine 16 is The hot air is circulated through the heating section 1 through the blowing duct 21.

In this state, in the first embodiment, the veneer veneer 8 is fed from the veneer veneer supply section 10 in the direction of arrow A shown by the solid line or the two-dot chain line with its fiber direction perpendicular to the conveying direction, and is then carried in. The hot air is first conveyed from the opening 3 through the air seal section 2 to the conveyance path 9 of the stage in the heating section 1. The veneer veneer 80 is heated again by passing through the disposed heat dissipation tube 13, and the veneer veneer 80 is easily drawn into the surface due to the change in airflow generated during this passage VC. V for surface and surface
Together with the radiant heat of the heat dissipation tube 18 arranged specifically for this purpose, the drying process progresses from the 17th stage to the middle and upper transport paths 9.
The air seal section 2.2' is folded and conveyed sequentially at each folding part, and the air seal section 2', 1fJ
Discharge section 4, cold ff+ section 5, unloading 1''6
In the second embodiment, which shows a straight conveyance format in which the continuous veneer veneer 8 passes through τ and reaches the veneer take-out section 11, The fiber direction is conveyed in the direction of arrow A perpendicular to the entire conveyance direction, and in the conveyance path 9 at the lower stage, the veneer veneer 8 after being cut to size is cut with a limited awn in the conveyance direction. They are transported in the direction of arrow A without being exposed to heat, are dried by the hot air circulating in the heating section 1, and the radiant heat of the heat radiation tube 13, and are taken out.

Furthermore, in the third embodiment showing a double air circulation type dryer, compared to the first and second large embodiments, the hot air circulated into the heating section 1 with the central connection area as a border is
Although there is a difference that the directions are opposite to each other, the veneer veneers 8 carried into the upper tier and the 56. conveyance path 9 of the ``tier'' are the same as in the case of the first embodiment. It reaches the take-out section 11 and is dried.

In addition, in the conveyance path 9 of the three-stage folded structure shown in the first and third embodiments, not only the veneer veneer 8 cut to a fixed length or cut to a certain length as shown in the figure, but also the upper stage of the second embodiment is used. Naturally, it can be a continuous veneer veneer 8 being conveyed to the conveying path 9.

As described above, according to the device of the present invention, a hot air circulation blower is arranged on the same longitudinal side of the upper part of the heating section, and a heating machine is arranged on the other side of the heating section, which is arranged in a required number of rows, to form a ventilation path. The suction duct and the blow duct provided at both longitudinal ends of this ventilation passage are connected to each heating section located directly below, and each heating section has a row of endless pipes for sandwiching and conveying the veneer veneer. In addition to arranging multiple stages of VC on the conveyor path consisting of a conveyor belt, the upper part of the valley conveyor path is configured with a spacing device and a plurality of heat dissipation pipes arranged in the longitudinal direction. As a result, the veneer veneer can be transported to the upper pair of endless transport belts without considering its length, preventing clogging and meandering during transport, and ensuring that the thickness It is possible to take out the fibers smoothly while reducing thickness unevenness, and if the conveyance path is a direct conveyance type, it is limited to the fiber direction - tg feed direction. be.

Furthermore, since the wind guide duct used to circulate the hot air in the direction perpendicular to the conveyance direction is no longer necessary, uneven drying can be eliminated while reducing the required power. By doing so, it is possible to enhance the reheating effect when the hot air passes through, the effect of guiding the hot air to the front and back surfaces of the veneer veneer as the airflow changes, and the radiation effect.

[Brief explanation of drawings]

Fig. 1 is a plan view of the first embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is an enlarged view of the inside of the heating section shown in the celestial CV of Fig. 2, and Fig. 4 is FIG. 3 is an enlarged internal view showing another embodiment of the present invention, FIG. 5 is a first side view showing a second embodiment of the present invention, FIG. Figure 7 is the same ntm diagram. ■... Heating section, 7... Endless conveyor belt, 8...
...Plywood veneer, 9...Transport path, I3...Radiation pipe, 15...Blower for hot air circulation, 16...
Heating machine, 17... Ventilation duct, 19... Suction duct, 21... Blowing duct. Patent applicant: Taihei Seisakusho Co., Ltd.

Claims (1)

[Claims] A blower for circulating hot air is placed on the longitudinal side of the upper part of the heating section, and a heating machine is placed on the other side of the heating section, forming a ventilation passage. The installed suction duct has a multi-stage conveyor path consisting of a pair of endless conveyor belts that sandwich and convey the plywood veneer, and a plurality of conveyor belts arranged at arbitrary intervals in the longitudinal direction above each conveyor path. A veneer veneer dryer characterized by being equipped with individual heat dissipation tubes.