ZB-2028melt indexer

1 Overview

1.1 Main purpose and scope of application

This instrument is suitable forGB3682-83Test method for flow rate of thermoplastic melt.

This instrument is used to measure the melt flow rate of various polymers in a viscous flow state. It is suitable for engineering plastics such as polycarbonate, polyarylsulfone, fluoroplastics, nylon, etc. with high melting temperatures, as well as polyethylene, polystyrene, polypropylene, etcABSThe testing of plastics with low melting temperatures, such as resins and polyoxymethylene resins, is widely used in industries such as plastic production, plastic products, petrochemicals, as well as relevant universities, research institutions, and inspection departments.

The machine has the following characteristics in constant temperature:

① Fast heating rate and minimal overshoot;

② High temperature control accuracy;

③ Can quickly restore a constant temperature state after filling;

④ This machine has automatic function/There are two manual functions.

1.2 working principle

The melt flow rate refers to the rate at which a thermoplastic, under a certain temperature and load, melts10minUsing the weight or volume of a standard dieMFRTo express, its numerical value can represent the viscous flow characteristics of thermoplastic in the molten state.

1.3 working conditions

① Room temperature10℃-40Within the range of ℃;

② The environmental humidity is30%-80%Within;

③ In an environment without vibration or corrosive media around;

④ Install and level correctly on a stable foundation;

⑤ There is no strong magnetic field interference during work, and there is no strong convection in the surrounding air;

⑥ Power supply voltage220V, frequency50HzThe fluctuation range of the power supply voltage should not exceed ± of the rated voltage10%.

2 structure

This instrument consists of four main parts: the host, temperature control system, temperature measurement system, and automatic cutting system.

2.1 The host is the center of the instrument, also known as the extrusion system, consisting of components such as the furnace body, barrel, piston, die, and weights.

2.1.1furnace body

The furnace body is composed of an electric heater, temperature measuring elements, etc.

2.1.2barrel

The material cylinder is placed inside the furnace body, made of alloy steel with high inner wall hardness and corrosion resistance. The inner diameter is Ø9.55±0.025mmThe length is160mm.

2.1.3piston

The piston material is corrosion-resistant stainless steel, with a hardness lower than that of the inner wall of the barrel. Total length of piston193mm, effective length175mmThe diameter of the piston rod is9mmThe axis bending is not greater than0.02/100The length of the piston head is6.35±0.10mmIts diameter is uniformly smaller than the inner diameter of the material cylinder0.075±0.015mmThe surface smoothness shall not be lower than0.2umThe radius of the chamfer on the lower edge of the piston head is0.4mm.

Engrave a distance on the upper part of the piston rod30mmThe two circular markings indicate the starting and ending lines of the sample cutting.

2.1.4oral model

Made of tungsten carbide, with a gap fit between the outer diameter of the die and the inner diameter of the barrel. The inner diameter of the die has2.095±0.005mmand1.180±0.010mmTwo types, with inner wall smoothness not less than0.2umAll heights are8.000±0.025mm.

2.1.5Load: The load is the sum of the weights, trays, and pistons, with an accuracy of ±0.5%.

The load of this instrument consists of a combination of weights, including a piston, a weight tray, a weight cover600gweight1One875gweight1One960gDamn it1One1000gweight1One1200gweight1One1600gweight1One2000gweight8One.

According to the required load for the experiment, the combination weights are shown in the table1

table1

load	0.325kg	1.2kg	2.16kg	3.8kg	5kg	10kg	21.6kg
group combine, synthesize Damn it code	piston Weight tray Weight cover	0.325 0.875	0.325 0.875 0.96	0.325 0.6 0.875 2	0.325 0.875 1.2 1.6 1.0	0.325 0.875 1.2 1.6 2×3	2×8 0.6 1.2 0.875 1.6 1.0 0.325

2.1.6pull board

The pull plate is connected to the handle outside the furnace body. When the pull plate is pulled out, the mouth mold can be removed from the furnace body. After pushing the pull plate inward to the bottom, the mouth mold can be blocked. The scraper is not obstructed by the pull plate when rotating and cutting materials, and the sample strip can flow out through the mouth mold.

2.1.7Temperature control system:

The instrument is equipped with heating and constant temperature control devices, with a temperature control range of room temperature-400℃, with an accuracy of ±0.5Within ℃, temperature

Volatility ±0.5℃。

2.1.8Temperature measurement system: capable of measuring and displaying temperature values in real-time, with a resolution of0.1℃, display error ±0.5℃。

2.1.9Automatic cutting system: Automatically cut materials according to the set time interval and frequency, with a timing unit of seconds.

3 Belonging device

Scraper, feeding funnel, cleaning rod, feeding top rod, mouth mold cleaning rod and level.

4 Instrument installation

4.1 Instrument unboxing inspection

During the transportation of instruments, it is important to avoid severe vibrations and mechanical damage.

If the instrument is damaged due to packaging box damage, please promptly contact the relevant transportation department and notify our factory. Operators are advised not to handle it on their own.

4.2 install

The instrument should be placed on a sturdy and stable cement platform, with a workbench height of900mmIt is appropriate.

5 Test conditions

see table2

serial number	Standard inner diameter of mouth mold mm	Test temperature ℃	Oral modulus coefficient g.mm2	load kg
1	1.180	190	46.6	2.160
2