Slit type sizing nozzle

Abstract

The utility model discloses a slit type sizing nozzle, which comprises a die head 1, a diaphragm 2 and a template 3, the die head 1, the diaphragm 2 and the template 3 are sequentially overlapped and installed, a glue storage groove 12 is arranged on the die head 1, a glue pressure balance cavity 13 is arranged above the glue storage groove 12, the glue storage groove 12 is communicated with the glue pressure balance cavity 13 through a first slit 15, and the first slit 15 is communicated with the template 3 through a second slit 15. A second slit 16 and a third slit 17 are sequentially formed in the upper part of the glue pressure balance cavity 13; a rectangular through part 21 is arranged at the position, corresponding to the glue groove 12, of the diaphragm 2, an inclined through part 22 and a wedge-shaped notch 23 are further formed in the upper portion of the rectangular through part 21, and a glue outlet of the inclined through part 22 corresponds to the third slit 17; a glue inlet 31 is formed in the bottom of the template 3, and a V-shaped groove 32 is further formed in the position, corresponding to the inclined through part 22, of the template 3. Through the corresponding structural design, the nozzle can enable glue to achieve self-balance, so that the glue is prevented from being left on the nozzle to pollute equipment, the glue is recycled, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gluing, in particular to a slit type gluing nozzle. BACKGROUND

[0002] In the filter cigarette production process, the filter and the tobacco rod are connected into a long cigarette by tipping paper, and a certain thickness of glue is applied to the inner lining of the tipping paper to ensure the wrapping adhesion effect. In the tipping paper gluing process, the slit type gluing has been widely used. In the known tipping paper gluing device, the slit nozzle is composed of two templates, and a slit is formed at the joint part. The glue is extruded from the slit and applied to the tipping paper running in contact with the nozzle. In this gluing process, the tipping paper belt runs at a high speed. Using this gluing device for gluing, glue will remain on the nozzle. The residual glue accumulates at the outlet of the slit nozzle, which hinders the normal application of glue to the paper belt and forms a gluing defect. SUMMARY

[0003] The utility model discloses a slit type gluing nozzle, which can balance the glue and avoid the glue remaining on the nozzle to pollute the equipment.

[0004] The technical scheme of the utility model is as follows:

[0005] The utility model discloses a slit type gluing nozzle, which comprises a die head, a diaphragm and a template. The die head, the diaphragm and the template are sequentially and integrally installed. A glue storage groove is arranged on the die head. A glue pressure balance cavity is arranged above the glue storage groove. The glue storage groove and the glue pressure balance cavity are connected through a first slit. A second slit and a third slit are sequentially arranged on the upper part of the glue pressure balance cavity. A rectangular through part is arranged at the corresponding position of the diaphragm and the glue groove. An oblique through part and a wedge-shaped notch are further arranged on the upper part of the rectangular through part. The glue outlet of the oblique through part corresponds to the third slit. A glue inlet is arranged on the bottom of the template. A V-shaped groove is further arranged at the corresponding position of the template and the oblique through part.

[0006] The template is provided with a glue inlet connected with the rectangular through part of the diaphragm and the glue storage groove of the die head to form a glue channel. At the same time, the template is provided with a V-shaped groove with an opening facing the diaphragm, corresponding to the trapezoidal part of the diaphragm and the third slit outlet of the die head. At the same time, the two sides of the V-shaped groove opening are connected with the wedge-shaped notch and the oblique through part of the diaphragm. In use, after the paper tape covers the nozzle outlet, the third slit of the die head, the wedge-shaped notch and the oblique through part of the diaphragm and the groove of the template form a ring channel together. The glue squeezed out from the second slit will be partly applied on the paper tape and partly flow along the ring channel and then be applied on the paper tape from the third slit.

[0007] Further, the die head is provided with a circular arc surface, and the paper tape closely moves around the circular arc surface during the gluing operation.

[0008] Further, the third slit outlet gap is larger than the second slit outlet gap.

[0009] Further, the second slit and the third slit are nozzle outlets.

[0010] Further, the trapezoidal part between the oblique through part and the wedge-shaped notch has an upper base on the die head side and a lower base on the template side, and the oblique through part and the wedge-shaped notch correspond to the slit outlet of the die head and have the same width.

[0011] Further, the glue inlet is connected with the rectangular through part of the diaphragm, and the rectangular through part overlaps with the glue storage groove of the die head to form a glue storage part across the left and right sides.

[0012] Further, at the glue application position, the third slit of the die head, the oblique through part and the wedge-shaped notch of the diaphragm and the V-shaped groove of the template (3) form a ring channel.

[0013] As described above, due to the adoption of the above technical scheme, the beneficial effects of the utility model are:

[0014] 1. In the slit type glue applying nozzle, the glue is self-balanced in the ring channel at the nozzle outlet position, thereby avoiding the problem of glue accumulation during the glue application on the paper tape and improving the glue application quality.

[0015] 2. While ensuring uniform glue application, the excess glue can be recycled into the ring channel of the device to achieve glue reuse and save costs. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional view of the slit type glue applying nozzle of the utility model;

[0017] Figure 2 It is an exploded view of the parts of the utility model.

[0018] Figure 3 is a top view of the utility model;

[0019] Figure 4 is a cross section enlarged view of A-A of the utility model Figure 3 , which shows the structure of the nozzle in detail.

[0020] Reference signs: 1 - die, 11 - arc surface, 12 - glue storage groove, 13 - glue pressure balance cavity, 15 - first slit, 16 - second slit, 17 - third slit, 2 - diaphragm, 21 - rectangular through part, 22 - oblique through part, 23 - wedge-shaped notch, 24 - trapezoidal part, 3 - die plate, 31 - glue inlet, 32 - V-shaped groove, 4 - paper tape, 41 - glue film. DETAILED DESCRIPTION

[0021] It should be noted that the terms "first" and "second" and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by an "includes a" statement does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0022] The features and performance of the utility model will be described in further detail below in conjunction with the embodiments.

[0023] As shown in Figure 1 , 2 , 4, the utility model provides a gluing nozzle, including die 1, diaphragm 2, die plate 3. Die 1 is equipped with arc surface 11, when carrying out gluing operation, paper tape 4 is tightly close and moves around the arc surface 11, as shown in Figure 3 A-A of the utility model; die 1 is equipped with glue storage groove 12, glue pressure balance cavity 13, and glue pressure balance cavity 13 is connected with glue storage groove 12 through first slit 15.

[0024] Die 1 is equipped with slit outlet 17, and glue is extruded from the outlet 17 and is coated on paper tape 4, and the slit outlet 17 is connected with glue pressure balance cavity 13 through slit 16. In particular, the second slit gap 16 is small, and the third slit gap 17 is large. When performing gluing, the glue solution is coated from the second slit 16 to the third slit 17.

[0025] The glue storage groove 12 provided on the die 1 is used as a glue channel. After the glue flows through the glue storage groove 12, it flows into the glue pressure balancing cavity 13 through the first slit 15, and then flows out through the slit outlet 16.

[0026] The diaphragm 2 is provided with a rectangular through part 21 which overlaps the glue storage groove 12 of the die 1, and together forms a glue storage part which spans left and right. In addition, the diaphragm 2 is provided with a wedge-shaped gap 23 and an oblique through part 22 which correspond to the width of the slit outlet 16 of the die 1, and which are connected to the third slit 17 of the die 1 in the direction close to the glue outlet. At the same time, there is a trapezoidal part 24 between the wedge-shaped gap 23 and the oblique through part 22, the side close to the die 2 is the upper base, and the side close to the template 3 is the lower base.

[0027] The template 3 is provided with a glue inlet 31 which is connected to the rectangular through part 21 of the diaphragm 2 and the glue storage groove 12 of the die 1, forming a glue channel. At the same time, the template 3 is provided with a V-shaped groove 32 which opens towards the diaphragm 2 side, and corresponds to the trapezoidal part 24 on the diaphragm 2 and the outlet of the third slit 17 on the die 1. At the same time, the two sides of the V-shaped groove 32 are connected to the wedge-shaped gap 23 and the oblique through part 22 of the diaphragm 2, respectively.

[0028] After the paper tape 4 covers the nozzle outlet 16, the third slit 17 of the die 1, the wedge-shaped gap 23 and the oblique through part 22 of the diaphragm 2, and the V-shaped groove 32 of the template 2 form a ring-shaped channel around the trapezoidal part 24. The glue squeezed out from the second slit 16a will be partially applied to the paper tape 4 and partially flow along the ring-shaped channel under the push of the moving paper tape 4, and then applied to the paper tape 4 from the third slit 17, forming a glue film 41. The glue flow is shown in Figure 4

[0029] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the technical concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application.​

Claims

1. A slot applicator nozzle comprising a die (1), a diaphragm (2) and a template (3), characterized in that, The die head (1), the film sheet (2) and the mold plate (3) are sequentially stacked and installed, the die head (1) is provided with a glue storage groove (12), the glue storage groove (12) is provided with a glue pressure balance cavity (13) above, the glue storage groove (12) and the glue pressure balance cavity (13) are communicated through a first slit (15), the glue pressure balance cavity (13) is sequentially provided with a second slit (16) and a third slit (17) in the upper part; the film sheet (2) is provided with a rectangular through part (21) at the corresponding position of the glue storage groove (12), the rectangular through part (21) is further provided with an oblique through part (22) and a wedge-shaped notch (23) in the upper part, the glue outlet of the oblique through part (22) corresponds to the third slit (17); the mold plate (3) is provided with a glue inlet (31) in the bottom, and the mold plate (3) is further provided with a V-shaped groove (32) at the corresponding position of the oblique through part (22).

2. A slot applicator as defined in claim 1, wherein, The die head (1) is provided with a circular arc surface (11).

3. A slot applicator as defined in claim 1, wherein, The third slit (17) has a larger outlet gap than the second slit (16).

4. A slot applicator as defined in claim 3, wherein, The second slit (16) and the third slit (17) are nozzle outlets.

5. A slot applicator as defined in claim 1, wherein, The trapezoidal part (24) between the oblique through part (22) and the wedge-shaped notch (23) has an upper base on the die head side and a lower base on the mold plate (3) side, the oblique through part (22) and the wedge-shaped notch (23) correspond to the slit outlets of the die head (1) and have the same width.

6. A slot applicator as defined in claim 1, wherein, The glue inlet (31) is communicated with the rectangular through part (21) of the film sheet (2).

7. The slot applicator of any of claims 2, 4-6, wherein the slot applicator further comprises a first slot applicator and a second slot applicator. At the glue coating position, the third slit (17) of the die head (1), the oblique through part (22) of the film sheet (2), the wedge-shaped notch (23) and the V-shaped groove (32) of the mold plate (3) form a ring-shaped channel.

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