CN215095154U - Special high-pressure reaction injection molding machine for PDCPD material - Google Patents
Special high-pressure reaction injection molding machine for PDCPD material Download PDFInfo
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- CN215095154U CN215095154U CN202120795899.6U CN202120795899U CN215095154U CN 215095154 U CN215095154 U CN 215095154U CN 202120795899 U CN202120795899 U CN 202120795899U CN 215095154 U CN215095154 U CN 215095154U
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Abstract
The utility model provides a special high-pressure reaction injection molding machine for PDCPD materials, which comprises a frame, two pump unit assemblies arranged in the frame, a hydraulic station and two material tank bodies; the pump set assembly comprises a material pump motor and a magnetic coupling connected with the output end of the material pump motor, and the other end of the magnetic coupling is connected with a material metering pump; the hydraulic station is communicated with the two material heat exchangers, and the material heat exchangers are respectively provided with a filter; the top of the material tank body is respectively provided with a stirring motor; the outside of the material tank body is respectively provided with a magnetic turning plate liquid level meter, and the bottom of the material tank body is respectively provided with a temperature probe; two feeding pumps and a multi-mixing-head switching seat are arranged below the material tank body. The scheme provides a high-pressure reaction injection molding machine which is suitable for PDCPD raw material characteristics and has a simple and reliable structure.
Description
Technical Field
The utility model particularly relates to a special high-pressure reaction injection molding machine of PDCPD material.
Background
The PDCPD material is thermosetting plastic with a cross-linked three-dimensional network structure, has the advantages of low density, good low-temperature performance, good insulating property, good wave permeability, strong impact resistance, corrosion resistance and the like, and is widely applied to the fields of vehicle parts, large-scale shells, corrosion-resistant parts, military equipment and the like. The PDCPD material forming process is mainly a reaction injection molding method (RIM method), namely, two-component DCPD materials are subjected to high-pressure hedging mixing to obtain a high-quality mixture, and the mixture liquid is injected into a mold cavity of a mold to carry out polymerization reaction to obtain a product of the PDCPD material. At present, the materials produced by the RIM method are polyurethane materials, and no special reaction injection molding equipment for PDCPD exists in the market. Therefore, a special high-pressure reaction injection molding machine for PDCPD materials is urgently needed to solve the problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a special high-pressure reaction injection molding machine of PDCPD material to prior art not enough, this special high-pressure reaction injection molding machine of PDCPD material can solve above-mentioned problem well.
In order to meet the above requirements, the utility model adopts the following technical scheme: the special high-pressure reaction injection molding machine for the PDCPD material comprises a rack, two pump set assemblies arranged in the rack, a hydraulic station and two material tank bodies; the pump set assembly comprises a material pump motor and a magnetic coupling connected with the output end of the material pump motor, and the other end of the magnetic coupling is connected with a material metering pump; the hydraulic station is communicated with the two material heat exchangers, and the material heat exchangers are respectively provided with a filter; the top of the material tank body is respectively provided with a stirring motor; the outside of the material tank body is respectively provided with a magnetic turning plate liquid level meter, and the bottom of the material tank body is respectively provided with a temperature probe; two feeding pumps and a multi-mixing-head switching seat are arranged below the material tank body.
The special high-pressure reaction injection molding machine for the PDCPD material has the advantages that:
the scheme provides a high-pressure reaction injection molding machine which is suitable for PDCPD raw material characteristics and has a simple and reliable structure.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 schematically shows a structural schematic diagram of a PDCPD material-dedicated high-pressure reaction injection molding machine according to an embodiment of the present application.
Fig. 2 schematically shows a top view of a PDCPD material-specific high-pressure reaction injection molding machine according to one embodiment of the present application.
Wherein: 1. a low liquid level alarm lamp; 2. a pressure transmitter; 3. an energy storage device; 4. a material heat exchanger; 5. a stirring motor; 6. a magnetic flap level gauge; 7. a temperature probe; 8. arranging pipe racks; 9. a feeding pump; 10. a multi-mix head switching seat; 11. a frame; 12. a filter; 13. a material metering pump; 14. a magnetic coupling; 15. a material pump motor; 16. a pump package assembly; 17. a hydraulic station; 18. a material tank body; 19. nitrogen automatic balancing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the following description, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in accordance with an embodiment of the present application" although it may possibly refer to the same embodiment, does not necessarily refer to the same embodiment.
Certain features that are well known to those skilled in the art have been omitted from the following description for the sake of simplicity.
According to an embodiment of the application, a special high-pressure reaction injection molding machine for PDCPD materials is provided, as shown in fig. 1-2, and comprises a frame 11, two pump sets 16 arranged in the frame 11, a hydraulic station 17 and two material tanks 18; the pump unit assembly 16 comprises a material pump motor 15 and a magnetic coupling 14 connected with the output end of the material pump motor 15, and the other end of the magnetic coupling 14 is connected with a material metering pump 13; the hydraulic station 17 is communicated with the two material heat exchangers 4, and the material heat exchangers 4 are respectively provided with a filter 12; the top of the material tank body 18 is respectively provided with a stirring motor 5; the outside of the material tank 18 is respectively provided with a magnetic turning plate liquid level meter 6, and the bottom of the material tank 18 is respectively provided with a temperature probe 7.
According to an embodiment of the application, two feeding pumps 9 and a multi-mixing-head switching seat 10 are arranged below a material tank 18 of the high-pressure reaction injection molding machine special for PDCPD materials.
According to one embodiment of the application, a low liquid level alarm lamp 1 is arranged at the top of a frame 11 of the special high-pressure reaction injection molding machine for PDCPD materials.
According to an embodiment of the application, an energy accumulator 3 is further arranged in a frame 11 of the high-pressure reaction injection molding machine special for PDCPD materials, and the energy accumulator 3 is positioned above the hydraulic station 17.
According to an embodiment of the application, a pressure transmitter 2 is also arranged in a frame 11 of the high-pressure reaction injection molding machine special for the PDCPD material.
According to an embodiment of the application, the multi-mixing head switching seats 10 of the high-pressure reaction injection molding machine special for PDCPD materials are provided with the row pipe racks 8.
According to an embodiment of the application, an automatic nitrogen balancing device 19 is arranged between two material tanks 18 of the high-pressure reaction injection molding machine special for PDCPD materials.
According to one embodiment of the application, the structural connection relationship of the special high-pressure reaction injection molding machine for the PDCPD material is as follows: the frame is anterior both sides be equipped with material pump package assembly, and material pump oil assembly divide into: a material pump motor, a magnetic coupling and a metering pump. The middle part of the frame is provided with a hydraulic station assembly. A hydraulic input and output pipeline of the hydraulic station assembly is also connected to a material tank assembly which is provided with two components and arranged at the rear part of the rack of the pipe rack, and a stirring motor group, a side turning plate liquid level meter, a valve group, a temperature probe and a charging pump are arranged on the material tank. Two groups of material heat exchangers are arranged in front of the charging bucket. The heat exchanger is connected with the charging bucket. The middle part of the front end of the frame is provided with a control electric box, and both sides and the back of the control electric box are provided with a high-low pressure gauge for measuring materials and a pressure sensor. The middle part of the rear end of the frame is provided with a switching seat (a multi-mixing head switching device). The two sides of the rear end are provided with row pipe racks. The charging pump is connected with the charging bucket to supplement materials for the injection machine. In the circulating state, the material enters the mixing head through the charging bucket, the filter, the material pump, the distributor and the pipe frame, and then enters the pipe frame, the heat exchanger and the material tank after circulating from the mixing head.
According to one embodiment of the application, the principle of the injection machine of the special high-pressure reaction injection molding machine for the PDCPD material is as follows: the injection time is controlled by a PLC, the rotating speeds of two motors are controlled by two frequency converters, the output quantity, the material pressure and the proportion of the AB two-component material pump are controlled, and AB two-component material high-pressure circulation is realized. When in injection, the plug rod of the mixing head is pulled open, the materials A and B are mixed in a counter-impact manner, and the mixture of high-quality DCPD materials is output at regular time, fixed quantity and fixed proportion. The feeding of the two mixing heads is switched by the switching seat.
According to one embodiment of the application, a motor of the special high-pressure reaction injection molding machine for the PDCPD material is fixed on a motor support, and the motor support is fixed at a set position in the middle of a base support. The left air drum and the right air drum are connected and fixed on a central shaft of the motor. The left and right air drums are arranged in the left and right shells, and the motor drives the air drums to rotate after being electrified and generates air flow. When the air outlets rotate, the springs can generate elasticity after being stressed, the plastic warheads on the springs can slide between the grooves in the left shell and the right shell, and the corresponding screws rotate in the arc grooves on the left shell and the right shell, so that the two air outlets generate an included angle. The arrangement of the allocating device between the two shells enables the directions of the two air outlets of the blower to be adjusted randomly.
According to an embodiment of the application, the special high-pressure reaction injection molding machine for the PDCPD material has the following advantages: according to the characteristics of the DCPD material, nitrogen protection is used. According to the characteristics of the DCPD material, a more suitable special mixing head is used. The closed mold injection feature creates a multiple mix head control and switching device. The frequency conversion speed regulation and the setting of the circulation line have simpler and more reliable structure, and can reduce the use of hardware, reduce the cost and reduce the energy consumption. According to the characteristics of the DCPD material, a special anti-corrosion pipeline is used.
The following description focuses on the disadvantages of the prior art:
firstly, the polyurethane high-pressure foaming machine commonly used in the market at present cannot be directly used for producing PDCPD material products.
As for the production characteristics of the bicyclic material product, the pdcpd raw material is afraid of oxygen and water, and oxygen and water react with a catalyst in the material to lose the activity of the material. Therefore, nitrogen is needed for isolation protection, polyurethane materials do not have the requirement, and the DCPD injection machine is provided with the function of nitrogen protection.
Production process the mixing head of this injection machine is fixed to the mould for closed mould injection and cannot be removed from the mould after the injection has been completed. That is, a mixing head can only correspond to one mold, which is different from the previous production of polyurethane products.
And the characteristic of mold closing injection makes certain communication between the injection machine and the mold closing machine, and ensures injection when the mold closing machine closes the mold, so a program is needed to carry out double-machine linkage control.
The viscosity of the polyurethane material is high, so that an injection machine mostly adopts an L-shaped head for injection, and the mixing effect can be ensured only when the mixing pressure is generally above 10 MPa. The viscosity of the double-ring material is low, the double-ring material is easy to mix, an L-shaped head is not needed, high mixing pressure is not needed, and shear heat can be caused by overhigh mixing pressure and circulation, so that the double-ring material generates heat, the activity of a catalyst is consumed, and the quality of a product is influenced.
The high-low pressure switching of the traditional high-pressure machine is realized by a synchronous switching valve. The path of the high-pressure and low-pressure circulation of the traditional high-pressure machine is two groups of pipelines. The main pump motor runs at full frequency in the whole process, and the energy consumption is high.
Meanwhile, the traditional high-pressure machine adjusts the proportion of the AB component materials by using a variable pump and a flowmeter.
The DCPD injection machine changes the rotating speed through the frequency converter, can also adjust the proportion of AB two component materials, not only can realize high-low pressure change, energy-conserving safety.
Then, briefly summarized, are several features of the injection machine:
the 1 st requires nitrogen protection, then the machine needs to consider the nitrogen protection function, and a special nitrogen protection device is needed.
2, the mixing head cannot be removed from the mold throughout the production process due to the need to secure it to the mold for closed mold injection. This then requires switching of the two mixing heads to increase efficiency, and a multiple mixing head control and switching arrangement.
And the injection machine cannot inject when the die spotting machine is opened, and the middle part needs to have some limiting and protecting functions. A certain communication link is required between the injection machine and the die spotting machine, and double-machine linkage control is required to be designed on a control program.
The DCPD material characteristics determine that the mixing head cannot use the traditional L-shaped head, and the mixing pressure cannot be too high, so that a novel mixing head is required to be mixed at a lower viscosity.
A specialized mixing head and piping system designed for low mixing pressures and reduced shear heat generation is needed.
DCPD materials are corrosive to common rubber, so that the corrosion prevention treatment is generally required on the pipeline of the whole machine.
The DCPD injection machine changes the rotating speed through the frequency converter to realize high-low pressure change, the circulating pipeline is unchanged, the structure is simpler, and more energy is saved.
The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and detail, but should not be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.
Claims (6)
1. A special high-pressure reaction injection molding machine for PDCPD materials is characterized in that: the device comprises a rack, two pump unit assemblies arranged in the rack, a hydraulic station and two material tank bodies;
the pump unit assembly comprises a material pump motor and a magnetic coupling connected with the output end of the material pump motor, and the other end of the magnetic coupling is connected with a material metering pump;
the hydraulic station is communicated with the two material heat exchangers, and the material heat exchangers are respectively provided with a filter;
the top of the material tank body is respectively provided with a stirring motor;
the outside of the material tank body is respectively provided with a magnetic turning plate liquid level meter, and the bottom of the material tank body is respectively provided with a temperature probe;
two feeding pumps and a multi-mixing-head switching seat are arranged below the material tank body.
2. The special high-pressure reaction injection molding machine for PDCPD materials according to claim 1, which is characterized in that: and a low liquid level alarm lamp is arranged at the top of the rack.
3. The special high-pressure reaction injection molding machine for PDCPD materials according to claim 1, which is characterized in that: an energy storage device is further arranged in the frame and located above the hydraulic station.
4. The special high-pressure reaction injection molding machine for PDCPD materials according to claim 1, which is characterized in that: and a pressure transmitter is also arranged in the frame.
5. The special high-pressure reaction injection molding machine for PDCPD materials according to claim 1, which is characterized in that: all be equipped with row's bank of tubes pipe support on the first switching seat of many mixings.
6. The special high-pressure reaction injection molding machine for PDCPD materials according to claim 1, which is characterized in that: and a nitrogen automatic balancing device is arranged between the two material tank bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120795899.6U CN215095154U (en) | 2021-04-19 | 2021-04-19 | Special high-pressure reaction injection molding machine for PDCPD material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120795899.6U CN215095154U (en) | 2021-04-19 | 2021-04-19 | Special high-pressure reaction injection molding machine for PDCPD material |
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| Publication Number | Publication Date |
|---|---|
| CN215095154U true CN215095154U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120795899.6U Active CN215095154U (en) | 2021-04-19 | 2021-04-19 | Special high-pressure reaction injection molding machine for PDCPD material |
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| CN (1) | CN215095154U (en) |
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2021
- 2021-04-19 CN CN202120795899.6U patent/CN215095154U/en active Active
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