CN209955270U - A hot melt extrusion machine - Google Patents

Abstract

The utility model discloses a hot-melt extruder, comprising a hopper, a screw extruding device communicated with the hopper, a power transmission device connected with the screw extruding device, and a heating device for heating and cooling materials in the screw extruding device A cooling device, the screw extrusion device includes a barrel and a screw driven by a power transmission device provided in the barrel; the heating and cooling device includes a heating unit composed of a heating chamber arranged around the barrel, and a heating chamber Connected hot air unit and cold air unit. The utility model is characterized in that the hot air device is used as a heat source to heat the material in the screw extrusion device, and the burner in the hot air device can use cheap liquid fuels such as methanol, which is more energy-saving and processing cost than the electric heating device.

Description

A hot melt extrusion machine

technical field

The utility model belongs to drying equipment, in particular to a hot melt extruder.

Background technique

The melt extruder, also known as a plastic extruder, includes a hopper, a screw extrusion device connected to the hopper, a power transmission device connected to the screw extrusion device, and a heating and cooling device provided on the screw extrusion device. The melt extrusion machine can be matched with various plastic forming auxiliary machines such as pipe, film, holding material, monofilament, flat wire, packing belt, extruding mesh, plate (sheet) material, profiled material, granulation, cable coating, etc. Various plastic extrusion molding production lines are formed to produce various plastic products. The extrusion system adopts screw, and the heating and cooling device adopts electric heating and air cooling. The main problems are large power consumption and high processing cost.

Utility model content

The purpose of this utility model is to provide a hot melt extruder that saves energy and processing costs.

The technical scheme adopted to realize the purpose of the present utility model is as follows:

The hot-melt extruder provided by the utility model comprises a hopper, a screw extrusion device connected with the hopper, a power transmission device connected with the screw extrusion device, and a heating and cooling device for heating and cooling the materials in the screw extrusion device. , the screw extrusion device includes a barrel, a screw driven by a power transmission device arranged in the barrel; the heating and cooling device includes a heating unit composed of a heating chamber arranged around the barrel, and a heating chamber communicated with the heating chamber. Hot air unit and cold air unit.

The hot air device includes a combustion furnace using a burner, and a hot air pipe connecting the combustion furnace and the heating chamber.

The heating chamber is provided with an air inlet pipe communicating with the hot air pipe and an air outlet pipe that is discharged to the outside.

The cold air device includes a fan fixed on the heating unit and communicated with the heating chamber through a cold air pipe.

The heating chamber is covered with a thermal insulation layer.

A group of two heating chambers constitutes a heating unit, and the heating unit is covered with a thermal insulation layer.

It also includes a temperature control system, including a temperature probe inserted into the heating chamber, a thermostat electrically connected to the temperature probe, and a display electrically connected to the thermostat, the thermostat being connected to the hot air device and the cold air. The device is electrically connected.

beneficial effect

The utility model is characterized in that the hot air device is used as the heat source to heat the materials in the screw extrusion device, and the burner in the hot air device can use cheap liquid fuels such as methanol, which is more energy-saving and processing cost than the electric heating device.

The utility model can be used for extrusion molding of granular raw materials such as plastic and rubber.

The technical solutions of the present utility model are further described below in conjunction with the accompanying drawings.

Description of drawings

Figure 1 is a front view of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 .

Detailed ways

Referring to Fig. 1 and Fig. 2, the hot melt extruder provided by the present utility model includes a hopper 3, a screw extruding device communicated with the hopper 3, a power transmission device connected with the screw extruding device, and a A heating and cooling device and a temperature control system for heating and cooling materials. The screw extrusion device includes a barrel 6 and a screw 7 located in the barrel 6 and driven by a power transmission device. The power transmission device includes a motor 11 and a gear box. 2. One end of the screw 7 is connected to the gear box 2, and the front of the barrel 6 is supported by the frame 9; the heating and cooling device includes a heating unit 4 composed of a heating chamber 401 arranged around the barrel 6, and the heating chamber 401 connected hot air device and cold air device, each two heating chambers 401 constitute a heating unit 4 (or a single heating chamber 401 can constitute a heating unit 4); the hot air device includes a combustion furnace 1 using a burner, a connected combustion The hot air pipe 12 of the furnace 1 and the heating chamber 401, each heating chamber 401 is provided with an air inlet pipe 402 communicating with the hot air pipe 12 and an air outlet pipe 403 discharged to the outside; The pipe 404 is connected with the fan 10 of the heating chamber 401, the heating unit 4 is covered with an insulating layer 13, and the hot air pipe 12 is also covered with an insulating layer; the temperature control system includes a temperature measuring probe 5 inserted into the heating chamber 401, and the temperature measuring The probe 5 is electrically connected to a thermostat (not shown), and the display 15 is electrically connected to the thermostat. The thermostat is electrically connected to the hot air device and the cold air device.

When the utility model works, the plastic particles enter the barrel 6 of the screw extruding device from the hopper 3. Under the drive of the power transmission device, the screw 7 rotates to convey the plastic particles from the tail of the feeding end to the head of the discharging end. The high temperature hot air provided by the combustion furnace 1 enters the heating chamber 401 through the hot air pipe 12 to heat and melt the plastic particles and extrude them from the discharge port 8 of the machine head 14 at the front end of the barrel 6 . Due to excess heat generated by shear friction when the screw 7 rotates, in order to avoid plastic decomposition, scorch or difficulty in setting due to excessive temperature, the fan 10 of the cold air device can provide cold air to the heating chamber 401 according to the set upper limit temperature for adjustment. temperature. The temperature in the heating chamber 401 is measured by the temperature measuring probe 5 and fed back to the thermostat, which automatically controls the working states of the hot air device and the cold air device to provide a suitable working temperature for the heating chamber 401 . The burner in the hot air plant can use inexpensive liquid fuels such as methanol.

Claims (7)

1. A hot-melt extruder, comprising a hopper, a screw extrusion device communicated with the hopper, a power transmission device connected with the screw extrusion device, a heating and cooling device for heating and cooling the material in the screw extrusion device, The screw extrusion device includes a barrel and a screw driven by a power transmission device arranged in the barrel; it is characterized in that the heating and cooling device includes a heating unit composed of a heating chamber arranged around the barrel, and a heating chamber. Connected hot air unit and cold air unit. 2. The hot melt extruder according to claim 1, wherein the hot air device comprises a combustion furnace using a burner, and a hot air pipe connecting the combustion furnace and the heating chamber. 3 . The hot melt extruder according to claim 2 , wherein the heating chamber is provided with an air inlet pipe communicating with the hot air pipe and an air outlet pipe discharged to the outside. 4 . 4. The hot melt extruder according to any one of claims 1 to 3, wherein the cold air device comprises a fan fixed on the heating unit and communicated with the heating chamber through a cold air duct. 5. The hot-melt extruder according to claim 4, wherein the heating chamber is covered with a thermal insulation layer. 6 . The hot melt extruder according to claim 4 , wherein a group of two heating chambers constitutes a heating unit, and the heating unit is covered with a thermal insulation layer. 7 . 7. The hot-melt extruder according to claim 1, further comprising a temperature control system, comprising a temperature measuring probe inserted into the heating chamber, a temperature controller electrically connected with the temperature measuring probe, and a temperature controller The thermostat is electrically connected to the hot air device and the cold air device.

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