Injection moulding machine hopper

FIELD: process engineering.

SUBSTANCE: invention relates to injection moulding. Integral multi-chamber drying hopper assembly consists of combination hopper, electrical heating and compressed air feed system and temperature control system. Combination hopper comprises, at least, two sub hoppers, each being furnished with independent inlet, independent outlet and independent-control compressed air feed channel. All outlets of sub hoppers are communicated with thermal control chamber arranged there under. Thermal control chamber bottom accommodates main outlet and main air feed channel. Thermal control chamber and every sub hopper are equipped with independent temperature control systems. Branch compressed air feed channels are combined in compressed air feed system via compressed air feed lines.

EFFECT: power savings, higher quality of drying of plastics.

6 cl, 4 dwg

 

The technical FIELD

The invention relates to a hopper of molding machine under pressure, in particular made in one piece multi chamber drying hopper for manual drying plastic made with the possibility of simultaneous independent exercise of drying and conditioning of raw materials of different types.

The LEVEL of TECHNOLOGY

In the process of molding plastic products usually requires that the water content of the raw material does not exceed 5‰, so before you run to flow under pressure it is necessary to carry out the drying and conditioning of raw materials, the process, as a rule, is that the drying and conditioning of raw materials are produced at a temperature of 90-200°C for 1-6 hours.

Famous bunkers for injection molding is equipped with a special device for conditioning and drying in front of thermostatic vessel, after completion of the drying and conditioning of raw materials are sent forth in a thermostatic tank, and during this process dissipates a lot of heat; at the same time, the process of transporting raw materials can easily be subjected to secondary pollution, it leads not only to the great expense of labor and raw materials, but also significantly affects the quality of the products.

In addition, when l is passed under pressure multi-layer composite plastic products since the processes of drying and conditioning different materials require different temperatures and duration for processing of various raw materials require special devices for conditioning and drying, and the above-mentioned disadvantage is especially serious.

Famous Chinese patent publication dated July 29, 2009 number CN 101491935 A, which describes a system and method for simultaneous temperature control of the hopper machines for casting under pressure and offers a system for providing synchronization of temperature in all sections of the hopper of a machine for injection molding and method of this regulation.

This system contains electrical heaters located in the appropriate places on all sections of the bin, and installed in the appropriate places of installation of the temperature sensors, all of which are connected by signal wires from the module to set the temperature, and the module set the temperature regulation module synchronization and temperature module the PID (proportional-integral-differential regulation) are connected via signal wires and the module PID control is connected to the signal wires with all electric heaters.

If the temperature in all sections of the hopper of the machine on which I injection molding will be mismatched or thermal radiation is not uniform, the temperature of all the sections can be set to the specified value using the fast regulation.

If between the setpoint temperature and the actual temperature values of all sections of the bin found discrepancies in real-time for all sections receive the output regulating signal to regulate the operation of all sections of the heaters, allowing implemented precise temperature control of all sections and effects are achieved ensure the synchronism of the temperature in all sections of the hopper machines for casting under pressure and quickly achieve the desired temperature.

This method offers the idea sectional temperature control for a single bin, making it possible to improve the accuracy of temperature control, but it is not possible to eliminate such disadvantages as high energy consumption associated with the movement of raw materials during the process of molding, large labor costs, ease of secondary pollution of raw materials and the subsequent impact on the quality of products.

DISCLOSURE of INVENTIONS

The proposed invention made in one piece multi chamber the drying hopper to speed drying plastic that consume energy in a small amount, saving time and labor costs, as well as the providing no secondary pollution and good quality products, in order to eliminate such defects as large heat losses associated with the movement of raw materials in the process of injection molding, high, high labor costs, ease of secondary pollution of raw materials and additional influence on the product quality.

To solve this technical problem is proposed made in one piece multi chamber the drying hopper for speed drying of plastics, comprising a combined hopper, electric heating system and compressed air supply and temperature regulation system, with a combined hopper contains at least two bedbunker, each with independent inlet, an independent outlet and branched conduit for compressed air, made with the possibility of independent control switch; all outlets of podocerus are connected with thermostatic chamber placed under them; the main outlet and the main channel of the air supply are located in the lower part of thermostatic chamber; in the lower part of thermostatic chamber main outlet and the main channel for air supply; and a thermostatic chamber and each bedbunker respectively equipped with an independent temperature control systems.

Device for drying and conditioning the cheese is I, being independent and posted separately in the known technical solutions, centered in the upper part of the hopper of molding machine under pressure; each bedbunker equipped with independent inlet, an independent outlet and branched conduit for compressed air, made with the possibility of independent control switch; the lower part of the hopper machines for casting under pressure is used as a thermostatic chamber, a main outlet and the main channel for air supply is placed in the lower part of thermostatic chamber; and a thermostatic chamber and each bedbunker respectively equipped with an independent temperature control systems, so that different materials can be different the temperature and duration of all bedbunker for independent drying and conditioning, and after completion of all processes of drying and conditioning, you should only open outlet of podocerus, after which the raw materials in bedbunker can directly enroll in a thermostatic chamber, and injection molding can be performed after mixing and processing in a thermostatic chamber with controlled temperature.

Since the drying and conditioning of various types of raw materials are water large capacity, is possible to eliminate not only the large heat losses during transportation and high labor costs in fragmented structure, but also secondary contamination during transport, and may be provided with quality products.

It should be clear that the number of podocerus essentially depends on the number of kinds of raw materials to be dried and air-conditioning; in addition, bedbunker can be placed additives for heating, so the number of podocerus may be more than the number of raw materials.

The size of each of bedbunker can be set in accordance with the amount of raw materials or additives on the amount of bedbunker, i.e. bedbunker can be structures of the same size or structures with mixed sizes.

Branched channels for compressed air bedbunker preferably connected to the compressed air through branch circuits for supplying compressed air, each of which is made the control valve air distribution and a device for heating branches, the main channel for air supply to thermostatic chamber and branched paths for compressed air connected in parallel in one system compressed air supply through a main circuit for supplying compressed air, which houses the main air CL the pan and the main heating device.

Because the entire system uses to heat the hot air and use the same compressed air that has the ability to reduce costs; in addition, every bedbunker and a thermostatic chamber, the heating temperature and heating time can be adjusted by means of the air valve and the heating device.

Preferably lattice bedbunker are located in the accommodating space near the upper parts of podocerus, the exhaust holes bedbunker and branched channels for compressed air supply and the main grille is located in the midst of thermostatic chamber, a main outlet and the main channel for air supply.

Grills are located in bedbunker and a thermostatic chamber, in the bottom region of podocerus or thermostatic chamber may be formed by a definite space, which provides a uniform inflow of hot air entering bedbunker or thermostatic chamber, containing raw materials area of podocerus or thermostatic chamber, thus ensuring uniform heating of raw materials.

Preferably the inlet opening of each of bedbunker posted hinged lid, each of which is pivotally attached to the corresponding bedbunker and each of which is made Vozduha nizaemon hole, and over thermostatic chamber also hosted a hole for air release.

Design with a hinged lid make it easier to add raw materials, and breathable hole used for the production of wet gas from podunkian.

Similarly over a thermostatic chamber has a hole for air release.

Preferably in a thermostatic chamber hosted mixing device. Mixing device provides rapid mixing coming from all bedbunker raw materials to a homogeneous condition, thus ensuring uniformity of all raw materials in a thermostatic chamber.

Preferably between every two podunkian, and between those podunkian and a thermostatic chamber respectively placed insulation and barrier layers.

The insulation and barrier layers are used for the following purposes: 1) providing thermal insulation and 2) ensure the relative independence of all bedbunker and a thermostatic chamber to prevent excessive heat transfer between podunkian and a thermostatic chamber, and also to prevent additional impact on the regulation of relevant temperatures.

The advantage of this invention is effective to correct such fault is in, as a large heat loss during transportation of raw materials during the known process of injection molding under pressure, high labour costs and the ease of secondary pollution caused by raw material, which affects the quality of the products, the present invention has a simple structure, low energy consumption, low labor costs, high performance and provides good quality products.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 schematically presents the proposed design made in one piece multi-sectional drying hopper for speed drying of plastic.

Figure 2 schematically presents another proposed design made in one piece multi chamber drying hopper for speed drying of plastic.

Figure 3 schematically presents a top view of the design depicted in figure 1.

Figure 4 schematically presents a top view of the structure shown in figure 2.

Indicate on drawings:

1: inlet of bedbunker;

2: accommodating space;

3: lattice of bedbunker;

4: main grille;

5: main outlet;

6: main channel for air supply;

7: the outlet of bedbunker;

8: branch channel for supplying compressed air;

9: thermostatic chamber;

10: breathable open the e;

11: compressed air;

12: branch heating device;

13: mixing device;

14: distributing valve for air distribution;

15: main air valve;

16: main heating device and

17: engine.

The IMPLEMENTATION of the INVENTION

The following is a specific description following the implementation of the invention together with the drawings.

Option 1

In the first variant implementation of the invention, as can be seen from figure 1 and figure 3, made in one piece multi chamber the drying hopper to speed drying plastic contains a combined hopper, electric heating system and compressed air supply and temperature regulation system, with a combined hopper contains three bedbunker, each of which has an independent inlet 1, an independent outlet 7 and the bifurcated channel 8 for the supply of compressed air is made with the possibility of independent control switch; all outlet openings 7 of podocerus are connected with thermostatic chamber 9, is placed under them; while in the lower part of thermostatic chamber main the outlet 5 and the main channel 6 for air supply, and a thermostatic chamber and each bedbunker respectively equipped with independent systems maintains the of temperature.

Grid 3 bedbunker are located in the accommodating space 2 near the upper parts of podocerus, the outlet 7 of podocerus and branched channels 8 for the supply of compressed air, and the main lattice 4 is located in the midst of thermostatic chamber 9, the main outlet openings 5 and the main channel 6 for air supply.

Branched channels 8 for supplying compressed air bedbunker connected to the system 11 of the compressed air through branch circuits for supplying compressed air, each of which is made the control valve 14 for air distribution and branched heating device 12, the main channel 6 for the air supply to thermostatic chamber and branched paths for compressed air are connected in parallel in one system compressed air supply through a main circuit for supplying compressed air, which houses the main air valve 15 and the main heating device 16.

On the intake hole 1 each bedbunker posted by rollaway when opening the cover, each of which is pivotally attached to the corresponding bedbunker, and each of which is made air permeable hole 10, and over a thermostatic chamber also hosted a hole for air release.

Between every two podunkian, as well as the between these podunkian and a thermostatic chamber respectively placed insulation and barrier layers.

Option 2

In the second variant implementation of the invention, as can be seen from Figure 2 and Figure 4, the combined hopper contains four bedbunker, and in a thermostatic chamber 9 posted by agitating device 13 connected to the engine 17, located near the top of podocerus, in the rest of the design is the same as in option 1.

When the work is made in one piece multi chamber drying hopper for speed drying of plastics in bedbunker place various kinds of raw materials or additives, valves, air distribution and branch circuit of the heating device on the respective contours of the compressed air adjusted in accordance with the required modes of drying and conditioning of the specified raw materials of various kinds, bedbunker of branched channels for compressed air serves up hot air, drying and conditioning of the specified raw materials of various kinds perform with different duration of heating at different temperatures during drying and conditioning a small amount of water vapor goes up through the breathable holes, after completion of all processes of drying and air conditioning open outlet of podocerus, after which the raw materials of podocerus can directly enroll in a thermostatic chamber at the intake of raw materials in thermo is taricheskoy chamber for mixing can be used mixing device, regulate the temperature of thermostatic chamber is implemented by the main air valve and the main heating device in the main circuit for supplying compressed air, hot air is blown into in a thermostatic chamber up from the main canal to supply air, exhaust gas, formed in a thermostatic chamber out of the outlet openings of the air, and injection molding can be carried out after mixing and processing of raw materials in a thermostatic chamber with controlled temperature.

1. Made in one piece multi chamber the drying hopper for speed drying of plastics, containing a combined hopper, electric heating system and compressed air supply and temperature control
wherein the combination hopper contains at least two bedbunker, each with independent inlet hole (1), independent of the exhaust hole (7) and branched channel (8) for supplying compressed air, made with the possibility of independent control switch; all outlet openings (7) of podocerus are connected with thermostatic chamber (9)placed under them; in the lower part of thermostatic chamber main outlet opening (5) and main channel (6) for air supply; thermostatic Cam is RA and each bedbunker respectively equipped with independent systems temperature control, moreover, the branched channels (8) for supplying compressed air bedbunker connected to the system (11) compressed air through branch circuits for supplying compressed air.

2. Hopper according to claim 1, characterized in that each of the branch circuits to supply compressed air made the control valve (14) for air distribution and heating device for heating the branches, the main channel (6) for the air supply to thermostatic chamber and branched paths for compressed air connected in parallel in one system compressed air supply through a main circuit for supplying compressed air, which houses the main air valve (15) and the main heating device (16).

3. Hopper according to claim 1, characterized in that the grating (3) of podocerus are located in the accommodating space (2) near the upper parts of podocerus, outlet openings (7) of podocerus and branched channels (8) for supplying compressed air, and the main grid (4) is in the midst of thermostatic chamber (9), the main outlet (5) and main channel (6) for air supply.

4. Hopper according to claim 1, characterized in that the inlet opening (1) each bedbunker posted hinged lid, each of which is pivotally attached to the corresponding bedbunker and each of which is made in suchodinceva hole (10), and over thermostatic chamber also hosted a hole for air release.

5. Hopper according to claim 1, characterized in that thermostatic chamber (9) is placed mixing device (13).

6. Hopper according to claims 1, 2, 3, 4 or 5, characterized in that between each two podunkian, and between those podunkian and a thermostatic chamber respectively placed insulation and barrier layers.



 

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