Multi-component mixed injection nozzle

Abstract

The utility model discloses a multi-component mixed injection nozzle which comprises a base, a push rod mechanism mounted on the base, an inner sleeve mounted in the base, an injection valve mechanism mounted on the base, a feed port assembly and a return port assembly, wherein the feed port assembly and the return port assembly are arranged on the base; the injection valve mechanism is installed on the side face of the base and used for controlling injection pressure, and the push rod mechanism is installed above the base and used for pushing out mixed materials. According to the technical scheme, when the push rod mechanism is located at a low position, materials enter the injection valve mechanism through the feeding port assembly and flow back to the material returning port assembly to flow out through the material returning groove formed in the push rod, and the situation that the materials are hardened and adhere to the interior of equipment after being not used for a long time in the equipment is effectively prevented; when the push rod mechanism is located at the high position, the materials are injected into the inner sleeve through the injection valve mechanism to be subjected to jet mixing and sprayed out to a follow-up station, the push rod mechanism returns to push out the materials attached to the interior of equipment after injection is completed, and the self-cleaning effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of coating, and in particular relates to a multi-component mixing injection nozzle. Background Art

[0002] The spraying device is used to apply high-viscosity glue to the required equipment. It is increasingly used in photovoltaic, electronics, automotive and other industries, which can greatly improve work efficiency and reduce manual labor.

[0003] Due to the characteristics of the spraying materials, the existing multi-component mixing spraying equipment needs to keep the internal materials in a flowing state and reduce the material residue inside the equipment as much as possible to avoid the spraying materials from solidifying and sticking, which in turn affects the use. To this end, it needs to meet two usage functions. First, when the internal materials do not need to be sprayed, the internal materials need to form a discharge and return cycle. Second, when the materials need to be mixed and sprayed, they need to be mixed and sprayed inside the equipment and after the spraying is completed, the residual materials inside the equipment can be reduced to achieve a self-cleaning effect and avoid internal sticking and solidification.

[0004] Therefore, in order to solve the above problems, a multi-component mixing injection nozzle is needed to solve the above problems. Utility Model Content

[0005] In view of this, in the multi-component mixing injection nozzle of the present technical solution, when the push rod mechanism is in a low position, the material enters the injection valve mechanism through the feed port assembly and flows back to the return port assembly through the return trough provided on the push rod, effectively preventing the material from hardening and sticking to the equipment after being not used in the equipment for a long time. When the push rod mechanism is in a high position, the material is sprayed into the inner sleeve through the injection valve mechanism for jet mixing and sprayed to the subsequent workstation. After the spraying is completed, the push rod mechanism returns to its position to push out the material attached to the equipment, thereby achieving a self-cleaning effect.

[0006] The utility model discloses a multi-component mixing injection nozzle, comprising a base, a push rod mechanism installed on the base, an inner sleeve installed in the base, an injection valve mechanism installed on the base, a feed port assembly and a return port assembly arranged on the base; the injection valve mechanism is installed on the side of the base for controlling the injection pressure, and the push rod mechanism is installed above the base for pushing out the mixed material.

[0007] Furthermore, the push rod mechanism includes an oil cylinder installed on the base and a material push rod used in conjunction with the oil cylinder. The lower end of the material push rod axially penetrates the inner sleeve and the material push rod can slide back and forth along the axial direction of the inner sleeve. A material push rod limit groove for limiting is provided on the material push rod.

[0008] Furthermore, the material push rod is provided with a return trough for use with the return port assembly, and the base is provided with a feed circuit for connecting the injection valve mechanism and the feed port assembly. The material enters the injection valve mechanism through the feed circuit and flows out of the return port assembly after passing through the return trough.

[0009] Furthermore, a mold joint for use with the inner sleeve is installed at the lower end of the base, and an end cover for use with the mold joint is provided at the lower end of the base. The mold joint outer sleeve is installed on the inner sleeve, and the end cover is fixedly installed with the base and is used to limit the mold joint.

[0010] Furthermore, the injection valve mechanism includes an injection valve body, a ejector pin assembly installed in the injection valve body, and a valve needle assembly installed on the injection valve body. A ejector pin adjustment assembly for adjusting the installation position of the ejector pin assembly is provided at the end of the injection valve body, and the ejector pin assembly is used to axially tighten the valve needle assembly.

[0011] Furthermore, the ejector assembly includes an ejector that can be axially slidably adjusted and installed in the injection valve body, a guide seat that is sleeved on the end of the ejector, and a spring arranged between the guide seat and the ejector. The cross-section of the ejector along the axial direction is a "cross" structure, and the end of the ejector axially passes through the guide seat. The spring is sleeved on the ejector and one end of the spring is pressed against the ejector, and the other end of the spring is pressed against the end surface of the guide seat.

[0012] Furthermore, the valve needle assembly includes a valve sleeve installed at the end of the injection valve body, a valve plate arranged at the end of the valve sleeve, and a valve needle installed in the valve sleeve. The valve needle can slide back and forth along the axial direction of the valve sleeve. A valve plate opening for cooperating with the valve needle is provided on the valve plate. The axial movement of the valve needle is used to open or close the valve plate opening.

[0013] Furthermore, the valve sleeve is provided with a valve sleeve opening in the circumferential direction, and the material enters the valve sleeve through the valve sleeve opening to push the valve needle to move in the axial direction; the ejector needle adjustment assembly includes an adjusting nut installed at the end of the valve sleeve and an adjusting screw installed on the valve sleeve, and the end of the adjusting screw is pressed against the ejector needle.

[0014] Furthermore, a positioning rod is provided on the base for positioning in conjunction with the inner sleeve. The positioning rod is fixedly installed in conjunction with the inner sleeve and the end of the positioning rod extends to the material push rod limiting groove for circumferentially limiting the material push rod.

[0015] Furthermore, the feed port assembly includes a first feed port and a second feed port with the same structure installed on the base; the return port assembly includes a first return port and a second return port with the same structure installed on the base.

[0016] Beneficial effects of the utility model:

[0017] In the multi-component mixing injection nozzle of the present technical solution, when the push rod mechanism is in a low position, the material enters the injection valve mechanism through the feed port assembly and flows back to the return port assembly through the return trough provided on the push rod, effectively preventing the material from hardening and sticking to the equipment after being not used in the equipment for a long time. When the push rod mechanism is in a high position, the material is sprayed into the inner sleeve through the injection valve mechanism for jet mixing and sprayed to the subsequent workstation. After the spraying is completed, the push rod mechanism returns to its position to push out the material attached to the equipment, thereby achieving a self-cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 2 This is a side sectional view of the utility model (the push rod mechanism is in a high position);

[0020] Figure 3 It is a top view schematic diagram of the utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the injection valve mechanism of the utility model;

[0022] Figure 5 It is an overall schematic diagram of the utility model. DETAILED DESCRIPTION

[0023] Figure 1 It is a cross-sectional schematic diagram of the utility model; Figure 2 This is a side sectional view of the utility model (the push rod mechanism is in a high position); Figure 3 It is a top view schematic diagram of the utility model; Figure 4 This is a cross-sectional schematic diagram of the injection valve mechanism of the utility model;

[0024] Figure 5 The utility model is an overall schematic diagram; as shown in the figure. A multi-component mixing injection nozzle, including a base 6, a push rod mechanism installed on the base 6, an inner sleeve 8 installed in the base 6, an injection valve mechanism 5 installed on the base 6, a feed port assembly and a return port assembly provided on the base; the injection valve mechanism 5 is installed on the side of the base 6 for controlling the injection pressure, and the push rod mechanism is installed above the base for pushing out the mixed material; the multi-component mixing injection nozzle of the technical solution, when the push rod mechanism is in the low position (such as Figure 1As described above, at this time the push rod mechanism is in the lowest position as a whole), the material enters the injection valve mechanism through the feed port assembly and flows back to the return port assembly through the return trough provided on the push rod, effectively preventing the material from hardening and sticking to the equipment after being not used in the equipment for a long time. When the push rod mechanism is in a high position, the material is sprayed into the inner sleeve through the injection valve mechanism for jet mixing and sprayed to the subsequent workstation. After the spraying is completed, the push rod mechanism returns to its position to push out the material attached to the equipment, thereby achieving a self-cleaning effect.

[0025] In this embodiment, the push rod mechanism includes an oil cylinder mounted on a base 6 and a material push rod 1 used in conjunction with an oil cylinder 9. The lower end of the material push rod 1 axially penetrates the inner sleeve 8 and the material push rod 1 can slide back and forth in the axial direction of the inner sleeve. The material push rod 1 is provided with a material push rod limit groove for limiting the position. The lower end of the material push rod 1 passes through the inner sleeve 8, and the oil cylinder 9 drives the material push rod 1 to move in the axial direction. A high-voltage proximity switch 10 is provided above it for detecting the position of the material push rod 1 to facilitate control of the internal mechanism (the high-voltage proximity switch 10 and the oil cylinder 9 can be made of existing technology and will not be described in detail here).

[0026] In this embodiment, the material push rod is provided with a return trough for use with the return port assembly, and the base 6 is provided with a feed circuit for connecting the injection valve mechanism and the feed port assembly. The material enters the injection valve mechanism through the feed circuit and flows out of the return port assembly after passing through the return trough. Figure 1 As shown in FIG, a return groove is provided in the circumferential direction of the material push rod 1 , and the material enters the injection valve mechanism 5 through the feed port 13 and flows back to the reflux joint 7 after passing through the return groove.

[0027] In this embodiment, the base 6 has a mold joint 3 mounted on its lower end for use with the inner sleeve. An end cap 4 is also mounted on the lower end of the base, which is also compatible with the mold joint. The mold joint 3 is mounted over the inner sleeve 7. The end cap 4 is fixedly mounted on the base and serves to limit the mold joint's position. The mold joint 3 is mounted with the inner sleeve 7 and is fixedly limited in position by the end cap 4 in conjunction with the base 6. A mold sealing ring 2 is provided on the mold joint 3 to ensure sealing performance when used with other components.

[0028] In this embodiment, the injection valve mechanism 5 includes an injection valve body 17, an ejector assembly mounted within the injection valve body 17, and a valve needle assembly mounted on the injection valve body. A ejector adjustment assembly is provided at the end of the injection valve body 17 for adjusting the installation position of the ejector assembly. The ejector assembly is used to axially tighten the valve needle assembly. The ejector assembly and the valve needle assembly are provided within the injection valve body 17, and the ejector assembly's overall position can be adjusted using the ejector adjustment assembly.

[0029] In this embodiment, the ejector assembly includes an ejector 19 that can be axially slidably adjusted and installed in the injection valve body, a guide seat 20 that is sleeved on the end of the ejector 19, and a spring 18 that is arranged between the guide seat 20 and the ejector 19. The ejector 19 has a "cross" structure in the axial direction. The end of the ejector 19 axially passes through the guide seat 20. The spring 18 is sleeved on the ejector and one end of the spring 18 is pressed against the ejector, while the other end of the spring 18 is pressed against the end surface of the guide seat 20. Figure 4 As shown, the overall cross-section of the ejector pin is a cross-shaped structure. The upper end of the ejector pin is used in conjunction with the ejector pin adjustment assembly, and the lower end forms a step structure for installation in conjunction with the guide seat 20. The spring sleeve is wrapped around the ejector pin 19 and the two ends are respectively installed in conjunction with the ejector pin and the guide seat. The guide seat can slide relative to the lower end of the ejector pin, and the valve needle assembly can drive the guide seat 20 to move in the axial direction.

[0030] In this embodiment, the valve needle assembly includes a valve sleeve 24 mounted at the end of the injection valve body, a valve disc 26 disposed at the end of the valve sleeve 24, and a valve needle 23 mounted within the valve sleeve 24. The valve needle 23 can slide back and forth along the axial direction of the valve sleeve. The valve disc 26 defines a valve disc opening for the valve needle. The axial movement of the valve needle is used to open or close the valve disc opening. The valve needle 23 can slide axially within the valve sleeve 24. A sealing ring 21 and a sealing seat 23 are disposed between the valve needle 23 and the valve sleeve 24 to ensure sealing performance. The lower end of the valve needle has a tapered structure, and the axial movement of the valve needle 23 can open or close the valve disc opening of the valve disc 26.

[0031] In this embodiment, the valve sleeve 24 is provided with valve sleeve openings 25 circumferentially, through which material enters the valve sleeve to propel the valve needle axially. The ejector pin adjustment assembly comprises an adjusting nut 14 mounted at the end of the valve sleeve and an adjusting screw 15 mounted on the valve sleeve, with the end of the adjusting screw 25 abutting against the ejector pin. Valve sleeve openings 25 are evenly distributed circumferentially around the valve sleeve 24 to facilitate material entry. When sufficient pressure is present within the valve sleeve 24, the valve needle 23 is pushed, thereby opening the valve plate opening. The adjusting screw 25, in conjunction with the adjusting nut 14, facilitates adjustment of the internal pressure, facilitating operation under various operating conditions.

[0032] In this embodiment, the base 6 is provided with a positioning rod 11 which cooperates with the inner sleeve 8 for positioning. The positioning rod 11 is fixedly installed with the inner sleeve 8 and the end of the positioning rod 11 extends to the material push rod limiting groove for circumferentially limiting the material push rod. Figure 2 As described above, the positioning rod 11 can adopt a positioning screw structure. After the positioning rod 11 is fixedly installed with the inner sleeve 8, its end extends into the material push rod limiting groove, so that the material push rod 1 will not rotate circumferentially and can only slide in the axial direction.

[0033] In this embodiment, the feed port assembly includes a first feed port and a second feed port with the same structure installed on the base; the return port assembly includes a first return port and a second return port with the same structure installed on the base. Figure 5 As described above, the two feed ports 13 with the same structure are symmetrically arranged relative to the material push rod 1, and the two return ports 7 also have the same structure and are symmetrically arranged relative to the material push rod.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A multi-component mixing injection nozzle, characterized in that: It includes a base, a push rod mechanism installed on the base, an inner sleeve installed in the base, an injection valve mechanism installed on the base, a feed port assembly and a return port assembly arranged on the base; the injection valve mechanism is installed on the side of the base to control the injection pressure, and the push rod mechanism is installed above the base to push out the mixed material.

2. The multi-component mixing injection nozzle according to claim 1, characterized in that: The push rod mechanism includes an oil cylinder installed on a base and a material push rod used in conjunction with the oil cylinder. The lower end of the material push rod axially penetrates the inner sleeve and the material push rod can slide back and forth along the axial direction of the inner sleeve. A material push rod limiting groove for limiting is provided on the material push rod.

3. The multi-component mixing injection nozzle according to claim 2, characterized in that: The material push rod is provided with a return trough for use with the return port assembly, and the base is provided with a feed circuit for connecting the injection valve mechanism and the feed port assembly. The material enters the injection valve mechanism through the feed circuit and flows out of the return port assembly after passing through the return trough.

4. The multi-component mixing injection nozzle according to claim 3, characterized in that: The lower end of the base is equipped with a mold joint for use with the inner sleeve, and the lower end of the base is provided with an end cover for use with the mold joint. The mold joint outer sleeve is installed on the inner sleeve, and the end cover is fixedly installed with the base and is used to limit the mold joint.

5. The multi-component mixing injection nozzle according to claim 1, characterized in that: The injection valve mechanism includes an injection valve body, a ejector pin assembly installed in the injection valve body, and a valve needle assembly installed on the injection valve body. The end of the injection valve body is provided with an ejector pin adjustment assembly for adjusting the installation position of the ejector pin assembly. The ejector pin assembly is used to axially tighten the valve needle assembly.

6. The multi-component mixing injection nozzle according to claim 5, characterized in that: The ejector assembly includes an ejector that can be axially slidably adjusted and installed in the injection valve body, a guide seat that is sleeved on the end of the ejector, and a spring arranged between the guide seat and the ejector. The cross-section of the ejector along the axial direction is a "cross" structure, and the end of the ejector axially passes through the guide seat. The spring is sleeved on the ejector, and one end of the spring is pressed against the ejector, and the other end of the spring is pressed against the end surface of the guide seat.

7. The multi-component mixing injection nozzle according to claim 6, characterized in that: The valve needle assembly includes a valve sleeve installed at the end of the injection valve body, a valve plate arranged at the end of the valve sleeve, and a valve needle installed in the valve sleeve. The valve needle can slide back and forth along the axial direction of the valve sleeve. A valve plate opening for cooperating with the valve needle is provided on the valve plate. The axial movement of the valve needle is used to open or close the valve plate opening.

8. The multi-component mixing injection nozzle according to claim 7, characterized in that: The valve sleeve is provided with a valve sleeve opening in the circumferential direction, and the material enters the valve sleeve through the valve sleeve opening to push the valve needle to move in the axial direction; the ejector needle adjustment assembly includes an adjusting nut installed at the end of the valve sleeve and an adjusting screw installed on the valve sleeve, and the end of the adjusting screw is pressed against the ejector needle.

9. The multi-component mixing injection nozzle according to claim 2, characterized in that: The base is provided with a positioning rod which is installed in conjunction with the inner sleeve for positioning. The positioning rod is fixedly installed in conjunction with the inner sleeve and the end of the positioning rod extends to the material push rod limiting groove for circumferentially limiting the material push rod.

10. The multi-component mixing injection nozzle according to claim 1, characterized in that: The feed port assembly includes a first feed port and a second feed port with the same structure installed on the base; the return port assembly includes a first return port and a second return port with the same structure installed on the base.

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