台式铅笔硬度计通过犁破漆膜的铅笔硬度等级测定漆膜硬度试验。

Bench-top pencil hardness tester determines paint film hardness test by ploughing paint film with a pencil hardness grade.

台式铅笔硬度计技术特征：硬度以在规定试验条件下通过犁破漆膜的铅笔硬度等级表示；试验台可移动。

Technical characteristics of bench pencil hardness tester: The hardness is expressed by the hardness level of the pencil by plowing through the paint film under the specified test conditions; the test bench is movable.

台式铅笔硬度计技术参数：

★荷重：500/750/1000+/-1g

★执行标准：GB/T6739-86 / JIS K5401 / ASTMD2197

★铅笔与试样夹角：45度

★铅笔规格：6H-6B(共13支中华牌铅笔)

★长*宽*高：450mm*150mm*270mm

Table pencil hardness tester technical parameters:

★ Load: 500/750/1000 +/- 1g

★ Executive standards: GB / T6739-86 / JIS K5401 / ASTMD2197

★ Angle between pencil and sample: 45 degrees

★ Pencil Specifications: 6H-6B (a total of 13 Chinese brand pencils)

★ L * W * H: 450mm * 150mm * 270mm

铅笔硬度计工作原理：

涂膜硬度是涂膜的一种重要物理性能，其大小直接影响涂膜的一些重要使用性能，例如耐磨损性、耐磨粒性能、耐摩擦性、耐划痕性、耐冲击性及涂膜滞留作用及清洗难易等，因此，涂膜硬度是评定涂料性能的必测指标。使用本仪器可方便地测定涂膜硬度。

主要由铅笔架和试验台组成，铅笔架与立柱等组成四连杆结构，保证了砝码的重量垂直作用于铅笔芯与试验台的交点上，并使铅笔与试验台成45°夹角，并保持不变。试验台可横向、纵向移动，用它固定涂料样板，并使样板朝着划痕方向滑动，铅笔**在试片上划出相应轨迹来。换用不同铅笔划不同痕迹，据此可判定涂膜的硬度值。

Working principle of pencil hardness tester:

Film hardness is an important physical property of the coating film, and its size directly affects some important use properties of the coating film, such as abrasion resistance, abrasion resistance, abrasion resistance, scratch resistance, impact resistance, and coating Film retention and ease of cleaning, etc. Therefore, the hardness of the coating film is an indispensable indicator for evaluating coating performance. Using this instrument can easily determine the hardness of the coating film.

It mainly consists of a pencil stand and a test stand. The pencil stand and the post form a four-link structure, which ensures that the weight of the weight acts vertically on the intersection of the pencil lead and the test stand, and makes the pencil and the test stand at an angle of 45 °. And remain the same. The test bench can be moved horizontally and longitudinally, use it to fix the paint sample, and slide the sample towards the direction of the scratch. The pencil ** draws the corresponding track on the test piece. Use different pencils to draw different marks, and based on this, you can determine the hardness of the coating film.

台式铅笔硬度计操作及使用方法：

★准备

按GB1727-70要求准备120*50*（0.2-0.3）平滑马口铁板或按产品规定的底材，制备涂膜。

用铅笔刀把每支铅笔前端削去木质部分，露出5-6mm柱状笔芯（注意铅笔芯A松动或削伤铅芯），用手握住铅笔，使铅笔始终与400号砂纸成90°角，在砂纸上摩擦铅芯端面，直到获得一端平滑边缘锐利的笔端为止（边缘要无破碎或缺口）

把削好的铅笔插入铅笔架上。调整铅笔，使铅笔芯工作端面与砝码心重合（相应铅芯工作端面与铅笔架约25mm），然后用螺钉拧紧，使铅笔位置固定。

松开夹紧螺母，放入需测定的涂膜试片，然后拧紧螺母，使试片固定。

松开止动螺钉，调整平衡锤，使工作杆平衡（即使铅笔刚好接触到试片上），然后拧紧止动螺钉，使铅笔芯工作面离开涂膜试片。

把砝码轻轻放在铅笔架上。

★测试

松开止动螺钉，使铅笔芯轻轻降下到被测涂膜试片上。

转动手轮，使涂膜板朝划痕方向移动大约5mm(顺时针转动手轮)，并留意观察表面是否划破。

取下砝码，更换铅笔，旋动试台旋扭，使试验台纵向移动一定距离更换试片划痕位置，重复准备操作后，再做下一次试验，依次用每种型号硬度的铅笔一次犁出五道痕迹。

从A硬的铅笔开始用此方法，当鉴定五道痕迹中，若有两次或两次以上犁伤膜时，换上一级的铅笔，直到找出五道痕迹中，只有一次犁伤涂膜的铅笔（或没有破坏）。则这一级铅笔的硬度值**代表被测涂膜的硬度。

Table pencil hardness tester operation and use method:

★ Ready

Prepare 120 * 50 * (0.2-0.3) smooth tinplate according to the requirements of GB1727-70 or the substrate specified by the product to prepare a coating film.

Use a pencil sharpener to cut the wooden part of the front end of each pencil to expose a 5-6mm columnar refill (note that pencil core A is loose or cut the lead core). Hold the pencil with your hand so that the pencil is always at a 90 ° angle with 400-size sandpaper. Rub the end surface of the lead on the sandpaper until you get a smooth pen with a sharp edge at one end (the edge should be free of chipping or chipping)

Insert the sharpened pencil into the pencil holder. Adjust the pencil so that the working surface of the pencil lead coincides with the weight center (the corresponding working surface of the lead lead is about 25mm from the pencil holder), and then tighten with a screw to fix the pencil position.

Loosen the clamping nut, put in the coating film test piece to be measured, and then tighten the nut to fix the test piece.

Loosen the stop screw, adjust the balance weight to balance the work bar (even if the pencil just touches the test piece), and then tighten the stop screw to make the working surface of the pencil lead separate from the coating film test piece.

Put the weight gently on the pencil holder.

★ test

Loosen the stop screw, and lower the pencil lead slightly onto the test film of the test film.

Turn the hand wheel to move the coating film plate about 5mm in the direction of the scratch (turn the hand wheel clockwise), and pay attention to observe whether the surface is scratched.

Remove the weight, replace the pencil, rotate the test bench to make the test bench move a certain distance in the longitudinal direction to change the scratch position of the test piece, repeat the preparation operation, and then perform the next test, plow with each type of pencil in order Five traces appear.

Use this method from A hard pencil. When the five traces are identified, if there are two or more ploughing membranes, replace the pencil with the next level until you find the five traces. Only one ploughing is applied. Membrane pencil (or not broken). Then the hardness value ** of this grade pencil represents the hardness of the tested coating film.

台式铅笔硬度计日常维护：

本仪器使用时力求转动灵活，使用一段时间后，须在丝杆、轴承等转动部位注入机油。

本仪器使用一段时间后，紧定螺钉，螺母须拧紧，以免松动。

Desktop pencil hardness tester daily maintenance:

When using this instrument, it is required to rotate flexibly. After using for a period of time, oil must be injected into the rotating parts such as the screw rod and the bearing.

After using the instrument for a period of time, tighten the screws and nuts to prevent loosening.