CN221249848U

CN221249848U - Spray head structure for printing soft rubber consumable

Info

Publication number: CN221249848U
Application number: CN202323104305.0U
Authority: CN
Inventors: 刘辉林; 郭晶; 郭平辉
Original assignee: Hubei Chuangxiang 3d Technology Co ltd
Current assignee: Hubei Chuangxiang 3d Technology Co ltd
Priority date: 2023-11-17
Filing date: 2023-11-17
Publication date: 2024-07-02
Anticipated expiration: 2033-11-17

Abstract

The utility model relates to a print shower nozzle structure of flexible glue consumptive material in 3D printer technical field, including the casing, locate the consumptive material passageway of casing inner chamber, and rotate two crowded material wheels of installing in the casing interior consumption material passageway left and right sides, one crowded material wheel passes through hold-down mechanism and adjusts the clearance with another crowded material wheel; the middle part of the wheel surface of each extrusion wheel is provided with a ring groove, a plurality of arc teeth are uniformly arranged in the ring grooves in a ring way, and the two extrusion wheels are correspondingly cut into the consumable channel to bite into the consumable, so that the top circle gap of the corresponding arc teeth of the two extrusion wheels is 0.55-0.65 times of the diameter of the consumable, and the front side wall and the rear side wall of the consumable channel are integrally connected up and down; this shower nozzle structure can guarantee the feed and the smooth degree of flexible glue consumptive material, improves the printing effect.

Description

Spray head structure for printing soft rubber consumable

Technical Field

The utility model relates to the technical field of 3D printers, in particular to a spray head structure for printing soft rubber consumables.

Background

Under the push of computer digital technology intellectualization, the application field of the 3D printing technology is wider and wider, and particularly the FDM hot melting technology is more and more favored by DIY lovers; along with popularization of the application field of printing technology, the demand on the market for printing soft rubber consumable products is also larger and larger, soft rubber consumable materials are different from hard rubber consumable materials, the soft rubber consumable materials are softer in material quality, the specification precision error is larger, feeding is not easy to control in printing, and the problems of consumable material clamping, consumable material abrasion, consumable material bending, consumable material pushing force insufficient, consumable material slipping and the like often occur, so that printing failure is caused; at present, the structure of printing soft rubber consumables in the market is also a general scheme for printing hard rubber consumables, the failure rate is higher, and the printing speed is slower, so that the structure of the printing spray head is required to be optimized and improved.

Disclosure of utility model

In order to overcome the defects in the background art and solve the prior art, the utility model discloses a spray head structure for printing soft rubber consumable materials, which can ensure the feeding amount and smoothness of the soft rubber consumable materials and improve the printing effect.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:

A spray head structure for printing soft rubber consumable materials comprises a shell, a consumable material channel arranged in the inner cavity of the shell, and two material extrusion wheels rotatably arranged on the left side and the right side of the consumable material channel in the shell, wherein a gap between one material extrusion wheel and the other material extrusion wheel is adjusted by a pressing mechanism; the middle part of the wheel surface of the extrusion wheel is provided with a ring groove, a plurality of arc teeth are uniformly arranged in the ring groove in a ring way, and the two extrusion wheels are correspondingly cut into the consumable channel to bite into the consumable, so that the top circle gap of the arc teeth corresponding to the two extrusion wheels is 0.55-0.65 times of the diameter of the consumable, and the front side wall and the rear side wall of the consumable channel are integrally connected up and down.

Further, the casing mainly comprises backshell piece and preceding shell piece, preceding shell piece link up from top to bottom and form the consumptive material passageway, the internal surface of preceding shell piece is equipped with the round groove of dodging that the adaptation extrusion wheel was embedded, dodging the round groove and the clearance of corresponding extrusion wheel and be 0.05 ~ 0.15mm.

Further, the front shell is made of integrally formed metal.

Further, the pressing mechanism comprises an extrusion poking clamp, an extrusion spring and an adjusting bolt, wherein the wheel shaft of a corresponding extrusion wheel is rotatably arranged in the middle of the extrusion poking clamp, the middle of the extrusion poking clamp is rotatably arranged on the inner wall of the shell through a pin shaft parallel to the wheel shaft of the extrusion wheel, and a limiting column which is vertical to the pin shaft is vertically fixed at the lower part of the extrusion poking clamp; the adjusting bolt comprises a screwing head part, a polished rod section, a shoulder part and a screw rod section which are sequentially and coaxially connected, the screw rod section is provided with a hexagonal nut, the side wall of the shell, which is far away from the extrusion shifting clamp, is provided with a limiting hole for adapting to the clamped polished rod section and limiting the axial movement of the adjusting bolt, and a limiting plate which is abutted against the hexagonal nut and limits the rotation of the hexagonal nut is arranged below the adjusting bolt; one end of the extrusion spring is sleeved on the limit column and corresponds to the extrusion shifting clamp to be abutted, and the other end of the extrusion spring is sleeved on the screw section and corresponds to the hexagonal nut to be abutted.

Further, a driven gear is coaxially fixed on the extrusion wheel corresponding to the pressing mechanism, a driving gear which is driven to rotate by the extrusion motor is coaxially fixed on the other extrusion wheel, and the driving gear and the driven gear are correspondingly meshed.

Further, an elliptical cavity surface is formed between the two extrusion wheels corresponding to the arc-shaped teeth, and the cross section of the consumable channel below the elliptical cavity surface is an elliptical cross section of the clearance fit elliptical cavity surface.

Further, the lower end of the consumable channel is sequentially connected with a teflon tube, a radiating block, a throat, a heating block and a nozzle.

Due to the adoption of the technical scheme, the utility model has the following beneficial effects:

According to the spray head structure for printing the soft rubber consumable, the arc-shaped teeth are arranged on the extruding wheel, and the tooth heights of the arc-shaped teeth are increased, so that the contact area between the extruding wheel and the soft rubber consumable is increased, meanwhile, shaking and slipping of the consumable are prevented, real-time fine adjustment can be performed on the feeding amount of the consumable under the self-adaptive compaction adjustment of the compaction mechanism, and the feeding amount and smoothness of the consumable are met; the shell structure is adjusted, so that the front side wall and the rear side wall of the consumable are communicated up and down, the consumable is prevented from having a bent deformation space in the pushing process, and abrasion and clamping are avoided; in conclusion, the utility model can reduce the possibility of printing and wiredrawing and greatly improve the printing precision.

Drawings

FIG. 1 is a schematic diagram of the positions of the consumable channel and the extrusion wheel;

FIG. 2 is a schematic diagram of the corresponding structure of two extrusion wheels;

FIG. 3 is a schematic view of a partial explosion configuration of the present utility model;

Fig. 4 is a schematic view of the mounting structure of the extrusion clip.

In the figure: 1. a consumable channel; 2. a material extruding wheel; 201. arc teeth; 3. a front housing member; 4. a rear housing member; 5. extruding a shifting clamp; 6. extruding a spring; 7. an adjusting bolt; 8. a hexagonal nut; 9. a limiting plate; 10. a pin shaft; 11. a limit column; 12. a driven gear; 13. a driving gear.

Detailed Description

In the description, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., the drawings merely correspond to the drawings of the present utility model, and in order to facilitate description of the present utility model, it is not indicated or implied that the device or element referred to must have a specific azimuth:

The spray head structure for printing the soft plastic consumable materials, which is described with reference to figures 1-4, comprises a shell, a consumable material channel 1 arranged in the inner cavity of the shell, and two extrusion wheels 2 rotatably arranged on the left side and the right side of the consumable material channel 1 in the shell, wherein the gap between one extrusion wheel 2 and the other extrusion wheel 2 is regulated by a pressing mechanism, namely when the consumable material passes through the two extrusion wheels 2, the pressing mechanism drives the one extrusion wheel 2 to be close to or far away from the other extrusion wheel 2, so that the fine diameter change of the consumable material is adapted; according to the requirement, the extrusion wheel 2 corresponding to the pressing mechanism is coaxially fixed with a driven gear 12, the other extrusion wheel 2 is coaxially fixed with a driving gear 13 which is driven to rotate by an extrusion motor, the driving gear 13 and the driven gear 12 are correspondingly meshed, the driving gear 13 and the driven gear 12 are driven to simultaneously and cooperatively rotate by one extrusion motor, and the two extrusion wheels 2 simultaneously clamp consumable materials to realize the function of pushing the consumable materials; in addition, the lower extreme of consumptive material passageway 1 has connected gradually indisputable fluorine dragon pipe, radiating block, choke, heating piece and nozzle.

According to the requirement, the pressing mechanism comprises an extrusion shifting clip 5, an extrusion spring 6 and an adjusting bolt 7, wherein the wheel shaft of a corresponding extrusion wheel 2 is rotatably arranged in the middle of the extrusion shifting clip 5, the middle of the extrusion shifting clip 5 is rotatably arranged on the inner wall of a shell through a pin shaft 10 parallel to the wheel shaft of the extrusion wheel 2, a limiting column 11 which is vertical to the pin shaft 10 is vertically fixed at the lower part of the extrusion shifting clip 5, and the limiting column 11 and the wheel shaft of the extrusion wheel 2 are respectively positioned at two sides of the pin shaft 10; the adjusting bolt 7 comprises a screwing head part, a polished rod section, a shoulder part and a screw rod section which are sequentially and coaxially connected, the screw rod section is provided with a hexagonal nut 8, the side wall of the shell, which is far away from the extrusion shifting clamp 5, is provided with a limiting hole which is adapted to the clamping sleeve polished rod section and limits the axial movement of the adjusting bolt 7, namely the aperture of the limiting hole is larger than that of the polished rod section and smaller than that of the screwing head part and the shoulder part, and a limiting plate 9 which is abutted against the hexagonal nut 8 and limits the rotation of the hexagonal nut 8 is arranged below the adjusting bolt 7; one end of the extrusion spring 6 is sleeved on the limit column 11 and correspondingly abuts against the extrusion shifting clip 5, and the other end of the extrusion spring 6 is sleeved on the screw section and correspondingly abuts against the hexagonal nut 8; the pressing mechanism can drive the corresponding extrusion wheel 2 to move by manually stirring the upper end of the extrusion poking clamp 5, so that the distance between the two extrusion wheels 2 is changed, and the extrusion poking clamp 5 can be pushed by the elasticity of the extrusion spring 6 to automatically adjust when the consumable passes; the outer diameter precision error of the flexible soft plastic consumable is larger, so that the feeding volume per unit length is different, the gap between the two extruding wheels 2 in printing is required to be changed along with the change of the outer diameter of the consumable in real time, the gap between the two extruding wheels 2 cannot be changed or cannot be changed in place due to the overlarge force of the extruding spring 6, the actual feeding amount cannot be controlled, the probability of wiredrawing during printing is increased, and the precision of a printing model is reduced; therefore, the elastic force of the extrusion spring 6 needs to be adjusted to one third of the state of the original hard glue consumable material to better realize the purpose that the distance between the two extrusion wheels 2 is changed according to the actual condition of the consumable material; the elastic force of the extrusion spring 6 can be realized by changing the material, and also can be realized by screwing the adjusting bolt 7, so that the hexagonal nut 8 axially moves along the adjusting bolt 7, and the telescopic length of the extrusion spring 6 is changed;

The middle part of the wheel surface of each extrusion wheel 2 is provided with a ring groove, a plurality of arc teeth 201 are uniformly arranged in the ring grooves in a ring way, the two extrusion wheels 2 are correspondingly cut into the consumable channel 1 to bite into the consumable, so that the top circle gap of the corresponding arc teeth 201 of the two extrusion wheels 2 is 0.55-0.65 times of the diameter of the consumable, generally about 0.6 times, the contact area of the extrusion wheels 2 and the consumable is enlarged by enlarging the tooth height of the arc teeth 201 and the radius of the top circle of the arc teeth 201, the depth of biting into the consumable is deepened, the shaking, slipping and abrasion of the consumable are prevented, the feeding amount of the pushed consumable is ensured, the flexible consumable is easy to deform under pressure, and the arc teeth 201 can effectively prevent the consumable from being flattened when the consumable is extruded by the extrusion wheels 2; the front side wall and the rear side wall of the consumable channel 1 are kept integrally connected up and down, so that the guiding function of the consumable in the shell is effectively prolonged; according to the requirements, the shell mainly comprises a rear shell piece 4 and a front shell piece 3, the front shell piece 3 is made of integrally formed metal materials, machining forming is adopted, machining precision is high, matching is better, the front shell piece 3 penetrates up and down to form a consumable channel 1, an avoidance circular groove which is used for adapting to embedding of the extrusion wheel 2 is formed in the inner surface of the front shell piece 3, the clearance between the avoidance circular groove and the corresponding extrusion wheel 2 is 0.05-0.15 mm, generally about 0.1mm, the clearance between the extrusion wheel 2 and the front shell piece 3 is reduced, and the consumable has no bending deformation space in the process of pressure pushing, so that faults of consumable clamping main in printing are avoided, and feeding precision is ensured; in addition, form oval chamber face between two crowded material wheels 2 correspond the arc tooth, the extrusion that the consumptive material received the pay-off tooth can form oval for the consumptive material is concentric with preceding shell 3 material conveying hole all the time, can not appear in the condition of rocking in the material conveying hole, the extrusion force that receives in the middle of the consumptive material is greater than the extrusion force that both sides received around simultaneously, so the consumptive material can take place deformation to both sides, the effectual friction that takes place between the consumable that has reduced and dodging the circular slot, make the pay-off more smooth, the consumptive material passageway 1 cross-section that is located oval chamber face below generally keeps unanimous with consumptive material passageway 1 upper portion, but also does not get rid of the condition of setting into the oval cross-section of clearance adaptation oval chamber face, thereby adapt to more keep the consumptive material stable feeding.

The utility model has not been described in detail in the prior art, and it is apparent to those skilled in the art that the utility model is not limited to the details of the above-described exemplary embodiments, but that the utility model can be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the above-described embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The utility model provides a print shower nozzle structure of flexible glue consumptive material, contains the casing, locates consumable passageway (1) of casing inner chamber to and rotate two crowded material wheels (2) of installing in casing consumable passageway (1) left and right sides, one of them crowded material wheel (2) adjusts the clearance with another crowded material wheel (2) through hold-down mechanism, characterized by: the middle part of the wheel surface of each extrusion wheel (2) is provided with a ring groove, a plurality of arc teeth (201) are uniformly arranged in the ring grooves in a ring way, and the two extrusion wheels (2) are correspondingly cut into the consumable channel (1) to bite into the consumable, so that the top circle gap of the corresponding arc teeth (201) of the two extrusion wheels (2) is 0.55-0.65 times of the diameter of the consumable, and the front side wall and the rear side wall of the consumable channel (1) are integrally connected.

2. The shower nozzle structure of printing the flexible glue consumable material according to claim 1, characterized in that: the shell mainly comprises a rear shell piece (4) and a front shell piece (3), wherein the front shell piece (3) is vertically penetrated to form a consumable channel (1), the inner surface of the front shell piece (3) is provided with an avoidance circular groove embedded by an adaptive extrusion wheel (2), and the clearance between the avoidance circular groove and the corresponding extrusion wheel (2) is 0.05-0.15 mm.

3. The shower nozzle structure of printing the flexible glue consumable material according to claim 2, characterized in that: the front shell (3) is made of integrally formed metal.

4. The shower nozzle structure of printing the flexible glue consumable material according to claim 1, characterized in that: the pressing mechanism comprises an extrusion stirring clamp (5), an extrusion spring (6) and an adjusting bolt (7), wherein the wheel shaft of a corresponding extrusion wheel (2) is rotatably arranged at the middle part of the extrusion stirring clamp (5), the middle part of the extrusion stirring clamp (5) is rotatably arranged on the inner wall of a shell through a pin shaft (10) parallel to the wheel shaft of the extrusion wheel (2), and a limiting column (11) which is vertical to the pin shaft (10) is vertically fixed at the lower part of the extrusion stirring clamp (5); the adjusting bolt (7) comprises a screwing head part, a polished rod section, a shoulder part and a screw rod section which are sequentially and coaxially connected, the screw rod section is provided with a hexagonal nut (8), the side wall of the shell, which is far away from the extrusion shifting clamp (5), is provided with a limiting hole which is adapted to the clamping sleeve polished rod section and limits the axial movement of the adjusting bolt (7), and a limiting plate (9) which is abutted against the hexagonal nut (8) and limits the rotation of the hexagonal nut is arranged below the adjusting bolt (7); one end of the extrusion spring (6) is sleeved on the limit column (11) and correspondingly abuts against the extrusion shifting clamp (5), and the other end of the extrusion spring (6) is sleeved on the screw section and correspondingly abuts against the hexagonal nut (8).

5. The shower nozzle structure of printing the flexible glue consumable material according to claim 1, characterized in that: the extrusion wheel (2) corresponding to the pressing mechanism is coaxially fixed with a driven gear (12), the other extrusion wheel (2) is coaxially fixed with a driving gear (13) which is driven to rotate by an extrusion motor, and the driving gear (13) and the driven gear (12) are correspondingly meshed.

6. The shower nozzle structure of printing the flexible glue consumable material according to claim 1, characterized in that: an elliptic cavity surface is formed between the two extrusion wheels (2) corresponding to the arc teeth, and the section of the consumable channel (1) below the elliptic cavity surface is an elliptic section of the clearance fit elliptic cavity surface.

7. The shower nozzle structure of printing the flexible glue consumable material according to claim 1, characterized in that: the lower end of the consumable channel (1) is sequentially connected with a teflon tube, a radiating block, a throat, a heating block and a nozzle.