veneer patching machines  PSh-2AM and PSh-2AME

1.1. Veneer patching machine

This machine is purposed for improvement of leaf-wood and soft-wood veneer sheets by patch insertion. It is possible to insert patches with or without glue. Depends on glue using it should be used different kind of punch tool. General view of veneer patching machine with strap feeding and disposing devices is represented in picture 1.

According to dimension of table bracket overhang it is possible to process veneer with dimensions 4x4, 5x5, 4x8 and 5x10 feet. For ease veneer processing customer can equip machine with additional table top.

Now “Proletarskaya svoboda” factory produces two type of veneer patching machines – PSh-2AM and PSh-2AME, difference is in type of main drive. First machine is driven by asynchronous motor with frictional compressed-air clutch, second type is direct driven by servomotor without any clutch.

Technical references of veneer patching machines  PSh-2AM and PSh-2AME:

• Table bracket overhang, mm – 1650±7;

• Maximum thickness of processed veneer, mm – 3,0;

• Minimum thickness of processed veneer, mm – 0,95;

• Humidity of processed veneer, % – 10 ÷ 12;

• Warpage of processed veneer, no more/on length, mm – 2/60;

• Width of veneer strap, mm - 40 ÷ 50;

• Humidity of veneer strap, % - 5 ÷ 7;

• Warpage of veneer strap - no more then 0,6 of strap thickness;

• Number of stroke in continuous mode, no less then, stroke/min – 55;

• Maximum size of punch tool, mm – 80x40;

• Overall dimensions of the Psh-2 AM/AME, mm (LxWxH) – 281014 х 8505 х 16207;

• Total weight, no more, kg - 2300

• Operational personnel, persons – 1;

• Type of electric power – 3-phase 50Hz 380VAC;

• Voltage of control circuits – 24VDC;

• Total electric motors’ power, Psh-2 AM/AME, kW – 1,1/2,91;

• Required air compressor operating pressure, Mpa – 0,4 ÷ 0,6;

• Operational air output, Psh-2AM/2AME, m3/min –  17 ÷ 25/6,3 ÷ 8,8;

• Purity of the supplied air according to ISO 8573-1 – 7.7.2

Using veneer strap with specified parameters will guarantee maximum durability of punch tool and most closely fitting insertion.

Working environment conditions are: temperature between +1C and +35 C, humidity up to 80% at +25C

Picture 1. Veneer parching machine

1.2. Veneer strap feeding device

Veneer strap feeding device of UPPSh type is purposed for hands-off feeding of veneer straps to veneer patching machines both our PSh-2AM/E and machines of another manufactures. Also this device disposes processed strap from the machine. The device consists of feeding device itself (see picture 2) and separate disposal device (see picture 3) installed directly into patching machine.

It is possible to work without this device, but in this case production output will be less then with this device installed.

Technical references of veneer strap feeding device UPPSh:

• Thickness of veneer strap, mm – 0,95 ÷ 4,0;

• Width of veneer strap, mm - 40 ÷ 50;

• Length of veneer strap, mm - 1050 ÷ 1600;

• Warpage of veneer strap - no more then 0,6 of strap thickness;

• Stack of veneer strap should be no higher then 330 mm and no heavier then 11 kg;

• Duration of one strap feeding, sec – 5 ÷ 6;

• Overall dimensions of main device, mm (L x W x H with/without ring-bolt) – 1403 х 276 х 956/910;

• Overall dimensions of disposal device, mm (L x W x H) – 286 х 285 х 366;

• Total weight, kg – 92;

• Type of electric power – 3-phase 50Hz 380VAC;

• Voltage of control circuits – 24VDC;

• Total electric motors’ power, kW – 0,18;

• Required air compressor operating pressure, Mpa – 0,5 ÷ 0,6;

• Operational air output, m3/min – 2;

Picture 2.  Strap feeding device

Picture 3. Strap disposal device

1.3. Strap slicing device

Strap slicing device of UNP (see picture 4) type is purposed for producing straps from veneer sheet, which can be used with any type of patching machines, especially with all types manufactured by our factory (PSh, PSh-2, PSh-2A and PSh-2AM/E). Main part of this device is two shafts with special kind of knife discs, veneer sheet is passed between and sliced for straps of given width. This device can be used instead of guillotine knife, usually used for this purpose.

Advantages of this device are as follows:

simple and reliable design;

small dimensions;

working without any hydraulic drive;

simplicity in setting and service;

high performance and low cost especially in comparison with guillotine

Technical references of veneer strap slicing device UNP:

• Thickness of veneer sheet, mm – 0,95 ÷ 4,0;

• Width of veneer sheet, mm - 260 ÷ 850;

• Length of veneer sheet, mm – 1600;

• Duration of one slice cycle, sec – 10;

• Width of veneer straps, mm – 50;

• Overall dimensions, mm (L x W x H) – 3295 х 1136 х 1268;

• Total weight, kg – 464;

• Type of electric power – 3-phase 50Hz 380VAC;

• Total electric motors’ power, kW – 1,1;

Picture 4. Strap slicing device

2. Sets of punch tool

Punch tool is a kind of cutting tool made by alloy steel and is using for veneer patching in patching machines of PSh-2A/AM/AME types.

All of tools made by CrWMn steel with hardness of 45÷50 by HRC scale, sharpening angle is 300. Durability of the tool is up to 300 000 insertions before sharpening. Hardness proving areas for cutting details are shown in picture 3.1. Working profile’s geometry of the cutting details is not depends on glue using, only mould is different.

We produce few types of punch tool with different shapes and sizes pointed in following Table.

All types of punch tool can be used for patch insertion without glue (see pictures 6, 7 and 8), but with glue it is possible to use only oval shape punch tool (see pictures 9). All marks in these pictures are as follows:

Picture 5.  Hardness proving areas

1 – notching unit;

2 – hold-down ring;

3 – push bar;

4 – mould unit;

5 – setting unit.

Reference list

of the Proletarian freedom plant