Деревянный кожевенный барабан, Лимин, загара для кожу дубления (60339449365)

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Price:19 000,00 $ - 19 500,00 $
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Product Overview

Description


Wooden tannery drum,liming,tanning drum for tanneies



Product Description

Our products have variety of specifications and functionas,welcome to consult )

































































































The Specification(mm)



Φ3000x3000 wooden normal drum



Loading capacity of skin



If leather : water=1:2,


For liming, about 3500kg.For tanning, about 2200kg



Drum body



Wood Material



Imported Ekki from Africa



Plate thickness(plank)



80mm, 1400kg/m3



Wood Guarantee



15 years



Drum’s door



Material


and style of the door



AISI 316L Stainless steel horizontal sliding door



Dimension of the door



Size of large door 700x800, size of small door 400x400



Gearwheel



Diameter,model



Φ2424 , m12



Material



Standard cast- steel, integrated casting with main spindle



Guarantee



All use life except normal abrasion



Spider/star



Diameter



Φ2200



Material



Standard cast- steel, integrated casting with main spindle



Guarantee



All use life except normal abrasion



Speed of the revolving drum



About 10rpm,single speed, (made as request)


Customer need confirm drum speed



Motor



15kw , provide hydraulic coupling


Customer need confirm voltage and frequency



Gear box



Hard-surface gear,160 style Specially used in drum ,and provide pneumatic brake


Customer need confirm gear box direction, it means the gear box is on left or right side when person faces drum standing on the floor.



Small gear of the gear box



Wear-resistant steel gear



Drain valve



All Material are AISI 316L Stainless steel, draining one side ,3 valves



Main spindle and the bearing



Main spindle zg45#,provide 22232 self-aligning bearing



Outside drum



CranesΦ20x12 with hot galvanization, transverse braceΦ22x6,vertical rodΦ20x12,made of 45# steel material



Inside Drum peg



Wooden drum peg Φ70xL(total)380, 9 steps,4/3 crisscross



Electrical control cabinet



Every drum has a cabinet with functions of forward and reverse starting, crawl, controlling total working time, reduced voltage starting and brake lag.




 


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Packaging & Shipping


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Fabrication process


Lime / Liming

The first step in the liming drum is the soaking of the hide.

Using water, the raw material is cleaned of any natural hide dirt.

The main objective in soaking the hide is to restore it to its natural condition as on the living animal with a water content of approximately 65%

After this, the liming takes place in the same drum.

Here, substances that can´t be turned into leather, such as natural oils and proteins, are washed out of the hide.

By adding lime and sodium sulphide, the ph-value during the dispensing process is raised. By doing so, hair is chemically removed from the surface of the hide.

Soaking and liming are carried out in one process, which typically lasts from 24 to 36 hours.

The limed and dehaired hide is now called pelt.

Fleshing

In the fleshing excess flesh and fatty tissue from under the pelt is removed mechanically.

Afterwards, the defleshed pelt is trimmed. During this process, the sections of the root of the tail, the navel, the kneecaps, and other unwanted parts of the hide are cut off.

Splitting

A bandknife is used to split the pelt horizontally into a grain split and a flesh split.

The grain or leather split is later processed into upper leather.

The flesh split is usually processed into split leather, but is here supplied to the gelatin industry. It is far too thin to be used as split leather, because the leather split is cut extra thickly.

Tanning

The central flow of work during leather fabrication is the tanning, which takes about 20 hours and follows a special formula carried out in a drum.

Until it is tanned, the hide is perishable. Only by tanning is the hide preserved and made durable.

This process is made up of five steps, which take place one after another in the tanning drum: deliming, bating, pickling, tanning, and basification.

During the first step - deliming -, the lime added in the liming drum is released, this step is carried out using carbon dioxide, which is very environmentally friendly.

During the next step - bating-, collagen and other proteins are removed in a regulated way by the use of enzymes. By doing this, the fibers become more flexible and the leather becomes softer.

In the pickle, the ph-value of the hide is lowered by adding acid and salt to prepare the hide for the addition of tanning agent.

When the hide has reached a ph-value of about 3 throughout its full width, it is ready for the adding of the tanning agent..

A wide variety of substances can be used for tanning.

Chromium, the most widely used and the most eco-friendly tanning agent available.

Chromium is a natural, non-toxic element and is actually a micronutrient found in our food.

When the ph-value is low, the chromium molecules are very small and can therefore easily penetrate the hide and become incorporated in the skin fibers

During basification, the pH-value is now slightly raised, which makes the chromium particles in the hide grow larger and connect with the skin collagen in at least two places.

This connection between tanning agent and hide material is called tanning.

The chromium tanning dyes the hide into a bluish color; therefore, after tanning it is called ”wet blue”.

Sammying / cutting

The wet blues, which are soaking wet, are placed on the sammying machine and two felt rollers press out a part of the water under high pressure.

Afterwards, the complete hide is cut into two sides, because sides are easier to be handled in further processing.





Company Information


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Our Services


* The continuous development of new and innovative products for our customers plays a deciding role for us.


** Our collections are presented at the relevant trade fairs each year. In these collections, we present a large number of current trend type in combination with both new functions and well-established machines.


*** Our customers can choose from a large variety of machines for from raw hides to finished leather.




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