A mesh-type dustpan and its production process

Abstract

The present invention discloses a mesh-type dustpan, comprising an intermediate ring, a screen and an outer ring cover, wherein the upper and lower side walls of the intermediate ring are respectively concave inwards to form an upper inner groove and a lower inner groove, and the screen is tightly covered on the intermediate ring and welded and fixed to the outer wall of the intermediate ring; the upper and lower parts of the outer ring cover are respectively bent inwards to form an upper bending groove and a lower bending groove, and an open embedding cavity is formed in the middle of the outer ring cover; at the same time, the present invention also discloses a production and preparation process of a mesh-type dustpan. The present invention can not only realize the installation of a screen structure on the dustpan to ensure the effect of the dustpan in screening materials, but also improve the stability and elasticity of the dustpan screen, prevent the screen from becoming loose and soft, and make the dustpan more beautiful as a whole.

Description

Technical Field

[0001] The invention relates to the design and production field of screen equipment, and more specifically to a mesh screen type dustpan and a production process thereof. Background Art

[0002] A dustpan is a common daily necessity used for screening materials or filtering water. Most existing dustpans are made of bamboo. There are many disadvantages in the use of bamboo dustpans. Not only does it have a short service life, but the number of sieves is uneven, and the structural stability of the weaving is insufficient. At the same time, bamboo dustpans are not easy to preserve and are prone to mold and moth.

[0003] Chinese Patent: A dustpan (Application Publication No.: CN102475508A) discloses a dustpan made of metal material, and its structure is to drill a plurality of sieve holes on the bottom surface of the dustpan to achieve the function of sieve filtering. Although it is made of metal material, its appearance and stability are better, but its structure has many disadvantages, such as the use of metal as a whole, which is not only costly, but also heavy. At the same time, since there is no sieve installed, its screening function is greatly limited.

[0004] In order to overcome the above technical problems, some metal dustpans have also appeared on the market, such as the dustpans attached to the instructions. Figure 1 As shown, the dustpan is also made of metal, and a screen body 15 is welded on the bottom of the metal dustpan 10 to improve the effect of screening materials. The connection point between the screen body 15 and the dustpan 10 is a welding fixing point on the side wall or bottom of the dustpan 10.

[0005] However, the screen of the above-mentioned metal dustpan is generally fixed to the bottom of the dustpan by welding, and the welding points need to be ground and polished, so its appearance is not high. Secondly, the tension of the screen is also low, and the tension will be further reduced after long-term use, which will affect the screening effect and reduce the elasticity of the screen. The structure and production process need to be further improved and perfected to produce a dustpan with high quality and low price. Summary of the invention

[0006] The invention discloses a mesh-type dustpan and a production process thereof, the main purpose of which is to overcome the above-mentioned deficiencies and disadvantages of the prior art.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A mesh-type dustpan comprises an intermediate ring, a screen and an outer ring cover, wherein the upper and lower side walls of the intermediate ring are respectively recessed inwards to form an upper inner groove and a lower inner groove, the screen tensioning cover is laid on the intermediate ring and is welded and fixed to the outer side wall of the intermediate ring; the upper and lower parts of the outer ring cover are respectively bent inwards to form an upper bending groove and a lower bending groove, an open embedding cavity is formed in the middle of the outer ring cover, the intermediate ring is movably nested in the embedding cavity in the outer ring cover, and the upper inner groove of the intermediate ring is adapted to be movably embedded in the upper bending groove on the outer ring cover, and the lower groove of the intermediate ring is adapted to be movably embedded in the lower bending groove on the outer ring cover.

[0009] Furthermore, the intermediate ring and the outer ring cover are respectively integrally roll-formed structures.

[0010] Furthermore, the bending curvatures of the upper bending groove and the lower bending groove are different.

[0011] A production process for a mesh screen dustpan comprises the following specific steps:

[0012] A. Preparation of the intermediate ring and the outer ring cover: Select a strip-shaped sheet, and use a line machine with different mold sets to press out an intermediate ring and an outer ring cover that are integrally formed, and set them aside;

[0013] B. Tightening and covering the screen: The pressed and formed middle ring is mounted on the movable plate of the tightening mold with a card set, and then the screen is laid on the upper part of the middle ring, and then the upper mold of the tightening mold is pressed on the lower mold of the tightening mold to fix the screen on the middle ring, and then the lifting device is started to lift the movable plate upward, so that the screen is tightly covered on the upper plane of the middle ring, and the screen is pressed against the outer wall of the middle ring at the same time, completing the tight covering of the screen;

[0014] C. Welding of the screen: Use a cold welding machine to weld the screen pressed against the outer wall of the middle ring to the outer wall of the middle ring;

[0015] D. Trimming: lower the lifting device, open the mold, remove the upper mold, then remove the middle ring of the tight cover covered with the screen, and trim the excess screen to obtain the middle ring of the tight cover covered with the screen;

[0016] E. Covering the outer ring cover: the intermediate ring obtained in step 4 is movably embedded in the embedding cavity of the outer ring cover, and then the upper inner groove of the intermediate ring is movably embedded in the upper bending groove of the outer ring cover, and the lower groove of the intermediate ring is movably embedded in the lower bending groove of the outer ring cover, so as to complete the movable covering of the outer ring cover;

[0017] F. Interface processing of the outer sleeve ring cover: The interface of the outer sleeve ring cover is welded and fixed, and a protective cover is put on to complete the processing of the interface of the outer sleeve ring cover, and finally a mesh screen type dustpan is obtained.

[0018] Furthermore, a tight sealing ring is fixedly sleeved on the corresponding pressing surfaces of the upper die and the lower die respectively, and the two corresponding tight sealing rings are double ring structures that are staggered and pressed against each other.

[0019] Furthermore, the tightening sealing ring includes an outer ring and an inner ring, the outer ring of the lower mold is correspondingly located between the outer ring and the inner ring of the upper mold, and the inner ring of the lower mold is correspondingly located on the inner side of the inner ring of the upper mold.

[0020] Furthermore, the intermediate ring, the screen and the outer ring cover are all made of metal.

[0021] It can be seen from the above description of the present invention that, compared with the prior art, the advantages of the present invention are:

[0022] 1. The present invention provides a structure of an intermediate ring, a screen and an outer ring cover, which can not only install the screen structure on the dustpan to ensure the effect of the dustpan in screening materials, but also improve the stability and elasticity of the dustpan screen to prevent the screen from becoming loose and soft, and at the same time make the dustpan more beautiful as a whole.

[0023] 2. Through improvements in process and equipment, the present invention can use a tightening mold to automatically tighten and cover the metal screen for installation, thereby improving the tightness of the screen and preventing it from becoming loose. At the same time, by designing the structure of the middle ring and the outer ring cover, the screen can be fixed and the middle ring can be nested, that is, the welding points can be covered, and the tightness of the screen can be further improved.

[0024] 3. The present invention can further improve the automation level of metal dustpan production by using tight mold equipment, automatic wire crimping machines, automatic cold welding machines and other equipment, change the backward production methods and production processes in the industry, and produce better quality and low-cost metal dustpans. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of a metal dustpan in the prior art.

[0026] Figure 2 It is a structural schematic diagram of the present invention.

[0027] Figure 3 It is a schematic diagram of the exploded structure of the intermediate ring and the outer sleeve ring cover of the present invention.

[0028] Figure 4 It is a schematic structural diagram of the intermediate ring of the present invention.

[0029] Figure 5 It is a structural schematic diagram of the outer sleeve ring cover of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the tensioning mold of the present invention.

[0031] Figure 7 It is a schematic diagram of the top view of the tensioning mold of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the upper mold of the tensioning mold of the present invention.

[0033] Fig. 9 It is a structural schematic diagram of the movable disk of the tensioning mold of the present invention. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention will be further described below with reference to the accompanying drawings.

[0035] like Figures 2 to 9 As shown, a mesh-type dustpan comprises an intermediate ring 1, a screen 2 and an outer ring cover 3, the upper and lower side walls of the intermediate ring 1 are respectively recessed inwards to form an upper inner groove 11 and a lower inner groove 12, the screen 2 is tightly covered on the intermediate ring 1 and is welded and fixed to the outer side wall of the intermediate ring 1; the upper and lower parts of the outer ring cover 3 are respectively bent inwards to form an upper bending groove 31 and a lower bending groove 32, an open embedding cavity 33 is formed in the middle of the outer ring cover 3, the intermediate ring 1 is movably nested in the embedding cavity 33 in the outer ring cover 3, and the upper inner groove 11 of the intermediate ring 1 is adapted to be movably embedded in the upper bending groove 31 on the outer ring cover 3, and the lower groove 12 of the intermediate ring 1 is adapted to be movably embedded in the lower bending groove 32 on the outer ring cover 3.

[0036] Furthermore, the intermediate ring 1 and the outer ring cover 3 are respectively integrally roll-formed structures.

[0037] Furthermore, the bending arcs of the upper bending groove 31 and the lower bending groove 32 are different.

[0038] The tight mold device for producing the mesh screen dustpan comprises a fixed frame 4, a movable plate 5, an upper mold 6 and a lower mold 7. An operating table 41 is provided on the upper part of the fixed frame 4, an operating port 42 is provided in the middle of the operating table 41, the movable plate 5 is arranged at the operating port 42, a lifting device 8 is provided at the bottom of the movable plate 5, the lifting device 8 drives the movable plate 5 to be lifted and lowered along the upper and lower directions of the operating port 42, and the middle ring 1 of the dustpan is placed on the movable plate 5 in cooperation with the movable card; the lower mold 7 is fixedly installed on the operating table 41, the upper mold 6 is pressed on the lower mold 7 in cooperation with the movable cover, the upper and lower molds (6, 7) are fixedly pressed with the screen 2 in cooperation, and the screen 2 is covered on the middle ring 1.

[0039] Furthermore, a fixed convex ring 51 is fixedly provided at the outer periphery of the movable disk 5 , and the intermediate ring 1 is placed on the fixed convex ring 51 in cooperation with the movable clamp.

[0040] Furthermore, the operating table 41 is provided with a plurality of fixing clamps 43 , and the upper die 6 is provided with a plurality of fixing blocks 61 , and the fixing clamps 43 and the fixing blocks 61 are matched to be clamped and fixed.

[0041] Furthermore, the fixing block 61 is in a strip shape, and the fixing block 61 extends out of the outer edge of the upper mold 6 .

[0042] Furthermore, a tight sealing ring 8 is fixedly sleeved on the corresponding pressing surfaces of the upper mold 6 and the lower mold 7, and the two corresponding tight sealing rings 8 are double-ring structures that are staggered and pressed against each other.

[0043] Furthermore, the outer edge of the tightening sealing ring 8 extends beyond the edge of the operating port 42 .

[0044] When the tightening mold device is in use, the middle ring can be fixed and clamped first, and then the screen covering the middle ring can be automatically tightened and pressed, so that the screen is tightened on the upper plane of the middle ring and on the outer side of the middle ring. At this time, the staff will weld and fix the screen on the outer side of the middle ring through a cold welding machine to obtain the middle ring tightly covered with the screen.

[0045] A production process for a mesh screen dustpan comprises the following specific steps:

[0046] A. Preparation of the intermediate ring and the outer ring cover: Select a strip-shaped sheet, and use a line machine with different mold sets to press out an intermediate ring and an outer ring cover that are integrally formed, and set them aside;

[0047] B. Tightening and covering the screen: The pressed and formed middle ring is mounted on the movable plate of the tightening mold with a card set, and then the screen is laid on the upper part of the middle ring, and then the upper mold of the tightening mold is pressed on the lower mold of the tightening mold to fix the screen on the middle ring, and then the lifting device is started to lift the movable plate upward, so that the screen is tightly covered on the upper plane of the middle ring, and the screen is pressed against the outer wall of the middle ring at the same time, completing the tight covering of the screen;

[0048] C. Welding of the screen: Use a cold welding machine to weld the screen pressed against the outer wall of the middle ring to the outer wall of the middle ring;

[0049] D. Trimming: lower the lifting device, open the mold, remove the upper mold, then remove the middle ring of the tight cover covered with the screen, and trim the excess screen to obtain the middle ring of the tight cover covered with the screen;

[0050] E. Covering the outer ring cover: the intermediate ring obtained in step 4 is movably embedded in the embedding cavity of the outer ring cover, and then the upper inner groove of the intermediate ring is movably embedded in the upper bending groove of the outer ring cover, and the lower groove of the intermediate ring is movably embedded in the lower bending groove of the outer ring cover, so as to complete the movable covering of the outer ring cover;

[0051] F. Interface processing of the outer sleeve ring cover: The interface of the outer sleeve ring cover is welded and fixed, and a protective cover is put on to complete the processing of the interface of the outer sleeve ring cover, and finally a mesh screen type dustpan is obtained.

[0052] Furthermore, a tight sealing ring is fixedly sleeved on the corresponding pressing surfaces of the upper die and the lower die respectively, and the two corresponding tight sealing rings are double ring structures that are staggered and pressed against each other.

[0053] Furthermore, the tightening sealing ring includes an outer ring and an inner ring, the outer ring of the lower mold is correspondingly located between the outer ring and the inner ring of the upper mold, and the inner ring of the lower mold is correspondingly located on the inner side of the inner ring of the upper mold.

[0054] Furthermore, the intermediate ring, the screen and the outer ring cover are all made of metal.

[0055] It can be seen from the above description of the present invention that, compared with the prior art, the advantages of the present invention are:

[0056] 1. The present invention provides a structure of an intermediate ring, a screen and an outer ring cover, which can not only install the screen structure on the dustpan to ensure the effect of the dustpan in screening materials, but also improve the stability and elasticity of the dustpan screen to prevent the screen from becoming loose and soft, and at the same time make the dustpan more beautiful as a whole.

[0057] 2. Through improvements in process and equipment, the present invention can use a tightening mold to automatically tighten and cover the metal screen for installation, thereby improving the tightness of the screen and preventing it from becoming loose. At the same time, by designing the structure of the intermediate ring and the outer ring cover, the screen can be fixed and the intermediate ring can be nested, that is, the welding point can be covered, and the nesting of the intermediate ring and the outer ring cover can clamp the screen, further improving the tightness of the screen.

[0058] 3. The present invention can further improve the automation level of metal dustpan production by using tight mold equipment, automatic wire crimping machines, automatic cold welding machines and other equipment, change the backward production methods and production processes in the industry, and produce better quality and low-cost metal dustpans.

[0059] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial improvement of the present invention using this concept should be regarded as an infringement of the protection scope of the present invention.

Claims

1. A production process for a mesh-type dustpan, characterized in that: The mesh-type dustpan comprises an intermediate ring, a screen and an outer ring cover, the upper and lower side walls of the intermediate ring are respectively recessed inwards to form an upper inner groove and a lower inner groove, the screen tension cover is laid on the intermediate ring and is welded and fixed to the outer side wall of the intermediate ring; the upper and lower parts of the outer ring cover are respectively bent inwards to form an upper bending groove and a lower bending groove, an open embedding cavity is formed in the middle of the outer ring cover, the intermediate ring is movably embedded in the embedding cavity in the outer ring cover, and the upper inner groove of the intermediate ring is adapted to be movably embedded in the upper bending groove on the outer ring cover, and the lower groove of the intermediate ring is adapted to be movably embedded in the lower bending groove on the outer ring cover; The production process of the mesh dustpan comprises the following specific steps: A. Preparation of the intermediate ring and the outer ring cover: Select a strip-shaped sheet, and use a line machine with different mold sets to press out an intermediate ring and an outer ring cover that are integrally formed, and set them aside; B. Tightening and covering the screen: The pressed and formed middle ring is mounted on the movable plate of the tightening mold with a card set, and then the screen is laid on the upper part of the middle ring, and then the upper mold of the tightening mold is pressed on the lower mold of the tightening mold to fix the screen on the middle ring, and then the lifting device is started to lift the movable plate upward, so that the screen is tightly covered on the upper plane of the middle ring, and the screen is pressed against the outer wall of the middle ring at the same time, completing the tight covering of the screen; C. Welding of the screen: Use a cold welding machine to weld the screen pressed against the outer wall of the middle ring to the outer wall of the middle ring; D. Trimming: lower the lifting device, open the mold, remove the upper mold, then remove the middle ring of the tight cover covered with the screen, and trim the excess screen to obtain the middle ring of the tight cover covered with the screen; E. Covering the outer ring cover: the intermediate ring obtained in step D is movably embedded in the embedding cavity of the outer ring cover, and then the upper inner groove of the intermediate ring is movably embedded in the upper bending groove of the outer ring cover, and the lower groove of the intermediate ring is movably embedded in the lower bending groove of the outer ring cover, so as to complete the movable covering of the outer ring cover; F. Interface processing of the outer sleeve ring cover: The interface of the outer sleeve ring cover is welded and fixed, and a protective cover is put on to complete the processing of the interface of the outer sleeve ring cover, and finally a mesh screen type dustpan is obtained.

2. The production process of a mesh-type dustpan according to claim 1, characterized in that: The intermediate ring and the outer ring cover are respectively integrally roll-formed structures.

3. The production process of a mesh-type dustpan according to claim 1, characterized in that: The upper bending groove and the lower bending groove have different bending arcs.

4. The production process of a mesh-type dustpan according to claim 1, characterized in that: A tight sealing ring is fixedly sleeved on the corresponding pressing surfaces of the upper die and the lower die respectively, and the two corresponding tight sealing rings are double ring structures that are staggered and pressed against each other.

5. The production process of a mesh-type dustpan according to claim 4, characterized in that: The tight sealing ring comprises an outer ring and an inner ring. The outer ring of the lower die is correspondingly located between the outer ring and the inner ring of the upper die, and the inner ring of the lower die is correspondingly located on the inner side of the inner ring of the upper die.

6. The production process of a mesh-type dustpan according to claim 1, characterized in that: The intermediate ring, the screen and the outer ring cover are all made of metal.

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