CN215095214U

CN215095214U - Special high-pressure mixing head for PDCPD product

Info

Publication number: CN215095214U
Application number: CN202120816283.2U
Authority: CN
Inventors: 董学强; 董壮壮
Original assignee: Chengdu Sniper Technology Development Co ltd
Current assignee: Chengdu Sniper Technology Development Co ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-10
Anticipated expiration: 2031-04-21

Abstract

The utility model provides a special high-pressure mixing head for PDCPD products, which comprises a tail oil cylinder; the front end of the tail oil cylinder is provided with a piston rod, a mixing head body is sleeved outside the piston rod, two sides of the mixing head body are respectively provided with a feed back connector, the top of the mixing head body is provided with two feeding connectors, and the front end of the mixing head body is provided with a filling port; two oil cylinder hydraulic joints are connected to the outer part of the tail oil cylinder; the outer side end face of the mixing head body is provided with a valve sleeve, and a pressure regulating valve needle is arranged in the valve sleeve. The device has simple structure, safety, high efficiency and strong stability, and is a special mixing head structure suitable for PDCPD material production characteristics.

Description

Special high-pressure mixing head for PDCPD product

Technical Field

The invention particularly relates to a special high-pressure mixing head for a PDCPD product.

Background

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. (DCPD polymerization reflects PDCPD formation, P is the meaning of polymer) at present, the material that uses RIM method to produce most is PU material, does not have special RIM mixing head of PDCPD on the market. At present, a mixing head of a PU high-pressure foaming machine is frequently used as a substitute. Therefore, the development and design of a special mixing head which has simple structure, safety, high efficiency and strong stability and is suitable for the production characteristics of PDCPD materials is imperative.

Disclosure of Invention

The invention aims to provide a special high-pressure mixing head for a PDCPD product, which can well solve the problems.

In order to meet the requirements, the technical scheme adopted by the invention is as follows: providing a special high-pressure mixing head for a PDCPD product, wherein the special high-pressure mixing head for the PDCPD product comprises a tail oil cylinder; the front end of the tail oil cylinder is provided with a piston rod, a mixing head body is sleeved outside the piston rod, two sides of the mixing head body are respectively provided with a feed back connector, the top of the mixing head body is provided with two feeding connectors, and the front end of the mixing head body is provided with a filling port; two oil cylinder hydraulic joints are connected to the outer part of the tail oil cylinder; the outer side end face of the mixing head body is provided with a valve sleeve, and a pressure regulating valve needle is arranged in the valve sleeve.

The special high-pressure mixing head for the PDCPD product has the advantages that:

the device has simple structure, safety, high efficiency and strong stability, and is a special mixing head structure suitable for PDCPD material production characteristics.

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 diagram of a PDCPD article-specific high-pressure mixing head according to an embodiment of the present application.

Fig. 2 schematically shows a structural diagram of a PDCPD article-specific high-pressure mixing head according to an embodiment of the present application.

Fig. 3 is a schematic diagram of the device.

Fig. 4 is a schematic diagram of the device.

Wherein: 1. a tail cylinder; 2. a guide post; 3. an inner seal; 4. a guide sleeve; 5. a support block; 6. A piston rod; 7. a mixing head body; 8. a first seal member; 9. a second seal member; 10. a third seal member; 11. A fourth seal member; 12. a pressure regulating valve needle; 13. a valve housing; 14. a seventh seal member; 15. a fifth seal member; 16. a sixth seal member; 17. a feed back interface; 18. a feeding port; 19. a material injection port; 20. the hydraulic joint of the oil cylinder.

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 present application, a special high-pressure mixing head for PDCPD products is provided, as shown in fig. 1-2, including a tail cylinder 1; the front end of afterbody hydro-cylinder 1 is equipped with piston rod 6, the outside cover of piston rod 6 is equipped with the mixing head body 7, the both sides of mixing head body 7 are equipped with a feed back interface 17 respectively, the top of mixing head body 7 is equipped with two interface 18 that come, the front end of mixing head body 7 is equipped with the sprue 19 that can pass piston rod 6.

According to an embodiment of the application, two oil cylinder hydraulic connectors 20 are connected to the outer part of the tail oil cylinder 1 of the special high-pressure mixing head for PDCPD products.

According to one embodiment of the application, a valve sleeve 13 is arranged on the outer side end face of the mixing head body 7 of the high-pressure mixing head special for the PDCPD product, and a pressure regulating valve needle 12 is arranged in the valve sleeve 13.

According to an embodiment of the application, a supporting block 5 for supporting the piston rod 6 is arranged between the tail oil cylinder 1 and the mixing head body 7 of the special high-pressure mixing head for PDCPD products.

According to an embodiment of the application, a first sealing element 8, a second sealing element 9, a third sealing element 10 and a fourth sealing element 11 are arranged at the joint of the tail oil cylinder 1 and the mixing head body 7 of the special high-pressure mixing head for PDCPD products.

According to one embodiment of the application, a seventh sealing member 14 and a fifth sealing member 15 are arranged at the joint of the valve sleeve 13 and the mixing head body 7 of the high-pressure mixing head special for PDCPD products.

According to one embodiment of the application, two groups of guide columns 2 are arranged on a tail oil cylinder 1 of the special high-pressure mixing head for the PDCPD product, and the guide columns 2 are inserted into a piston part of the piston rod 6 and used for positioning and guiding.

According to one embodiment of the application, a piston rod 6 of the special high-pressure mixing head for PDCPD products is provided with a circulating groove.

According to one embodiment of the application, the valve sleeve 13 of the PDCPD product-specific high-pressure mixing head is positioned on the channel of the incoming material interface 18.

According to one embodiment of the application, the position of the pressure regulating valve needle valve sleeve of the PDCPD product special high-pressure mixing head is on the channel of the incoming material interface. The piston rod is provided with a circulating groove, and when the piston is closed, the position of the circulating groove is just connected with the feeding interface and the return interface. At this point, a circulation loop is established, and the materials are circulated according to the components. When the piston is opened, the piston rod is withdrawn to block the circulation loop and to make the two material inlets communicated, so that the two material groups are mixed through high pressure opposite flushing. The tail oil cylinder 1 is connected with the mixing head body. A supporting block is arranged between the tail oil cylinder 1 and the mixing head body. The plug rod part of the piston rod penetrates out of the supporting block. Entering into the mixing head body. The piston portion of the piston rod is within the cylinder block. The movement is realized through oil feeding of oil inlets at two ends of the cylinder body. The inner hole of the supporting block is provided with a sealing element for blocking an oil path and a material path. The joint screw of the two materials is fixed on the mixing head body. The valve needle valve sleeves of the two materials are arranged on the mixing head body. Two groups of guide posts are arranged on the tail oil cylinder 1, and the guide posts are inserted into the piston part of the piston rod to play a role in positioning and guiding.

According to an embodiment of the present application, as shown in fig. 3 to 4, which are schematic diagrams of the apparatus, two broken lines with arrows on the left and right in fig. 3 to 4 indicate two mixed materials, wherein the piston is opened in the state of fig. 3, the piston rod is retracted, at this time, both the two inlets are communicated with the injection port for punching and mixing, the piston is closed in the state of fig. 4, the piston rod extends into the injection port to seal the injection port, and the materials are circulated internally, wherein two grooves of the piston rod in fig. 3 to 4 are circulation grooves, when the piston rod extends out, the inlets 18 and the ports inside the return ports 17 are located in the circulation grooves, the materials can pass through the inlets 18 to the circulation grooves and enter the return ports 17 to realize circulation, and when the piston rod is retracted, the return ports 17 are all blocked by the non-circulation grooves of the piston rod, at this time, the materials enter the mixing head body 7 through the inlets 18 and then are guided out from the injection port 19.

The mixing head of the PU high-pressure foaming machine used as a substitute in the prior art has the following problems:

the DCPD-RIM material has low viscosity, the traditional PU mixing head is designed for atomization mixing, the hedging pressure is higher, the characteristics of the DCPD material are not suitable, and a high-quality mixture cannot be obtained. The DCPD-RIM material contains an active catalyst, is easy to be lost in a high-temperature environment, and the activity of the catalyst is easy to be consumed in the circulation process of the traditional PU mixing head. The PU mixing head has a double-piston structure, and is complex in structure and poor in reliability. In order to ensure the matching sequence of the double pistons, the PU mixing head adopts a high-pressure-resistant proximity switch to acquire signals, and the proximity switch is exposed without protection, so that the PU mixing head has a complex structure, is easy to damage and has high cost. A mixing head is not required to be arranged on a mould in PU production, and the probability that the high-voltage proximity switch is collided is small. This is not the same as that produced by PDCPD. When the PU mixing head is shut down for protection, the double pistons are closed simultaneously (normally, the two pistons are closed in sequence), so that material trapping is easily caused. Compared with PU materials, PDCPD materials are harder and have better strength, and a small amount of trapped materials can easily cause gun blockage. The PDCPD product is produced by closed-mold injection, and a mixing head needs to be always installed and fixed on a mold. The PU mixing head is mostly produced by opening the mold for injection, and one end is opposite to a plurality of molds. And need not be fixed to the mold. The PU mixing head has no dedicated hang point for fixing. In the production process of the PDCPD product, a mixing head is arranged at the bottom of a mold and is tightly attached to the mold. The PU mixing head is not required to be fixed on a mould, so the appearance design is more random, and the PU mixing head is not suitable for the installation form. Because the viscosity of the PU material is higher, the matching precision of the plug rod of the PU mixing head and the head body is unilateral 0.006mm, and the viscosity of the PDCPD material is low. To sum up, the scheme provides a special mixing head which has simple structure, safety, high efficiency, strong stability and is suitable for PDCPD material production characteristics.

The device adopts a single-piston structure. The structure is simple and reliable. Meanwhile, a high-voltage-resistant proximity switch is not installed, and timing control is performed by utilizing a PLC program. The design has the hole site of hanging dress mixing head to annotate the overhead seal ring groove that is equipped with of material, prevent that the material from spilling when hugging closely the mould, and design into compact square structure, reduce fillet and cambered surface. So that the die can be better jointed with the die and is convenient to install.

The above-mentioned embodiments only show some embodiments of the present invention, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the claims.

Claims

1. A special high-pressure mixing head of PDCPD goods which characterized in that: comprises a tail oil cylinder;

the front end of the tail oil cylinder is provided with a piston rod, a mixing head body is sleeved outside the piston rod, two sides of the mixing head body are respectively provided with a feed back interface, the top of the mixing head body is provided with two feeding interfaces, and the front end of the mixing head body is provided with a feeding port;

two oil cylinder hydraulic joints are connected to the outer part of the tail oil cylinder;

the outer side end face of the mixing head body is provided with a valve sleeve, and a pressure regulating valve needle is arranged in the valve sleeve.

2. The special high-pressure mixing head for PDCPD products of claim 1, which is characterized in that: and a supporting block for supporting the piston rod is arranged between the tail oil cylinder and the mixing head body.

3. The special high-pressure mixing head for PDCPD products of claim 1, which is characterized in that: and a first sealing element, a second sealing element, a third sealing element and a fourth sealing element are arranged at the joint of the tail oil cylinder and the mixing head body.

4. The special high-pressure mixing head for PDCPD products of claim 1, which is characterized in that: and a seventh sealing element and a fifth sealing element are arranged at the joint of the valve sleeve and the mixing head body.

5. The special high-pressure mixing head for PDCPD products of claim 1, which is characterized in that: and two groups of guide posts are arranged on the tail oil cylinder, and the guide posts are inserted into the piston part of the piston rod and are used for positioning and guiding.

6. The special high-pressure mixing head for PDCPD products of claim 1, which is characterized in that: and the piston rod is provided with a circulating groove.

7. The special high-pressure mixing head for PDCPD products of claim 1, which is characterized in that: the valve sleeve is positioned on the channel of the feeding port.