阅读说明：本技术 一种粉末铺料器 (Powder spreading device ) 是由 胡宗辉 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种粉末铺料器,属于模压工艺中的铺料设备技术领域。粉末铺料器包括机架、下料组件和筛料组件,机架设有料槽；下料组件位于料槽下方,该下料组件包括履带下料板、轴辊、驱动装置及张紧装置；筛料组件位于所述下料组件下方,包括筛网及振动器。本发明巧妙地使用履带下料板以一排排粉料逐步下料的方式来下料,可避免粉料在料槽内堆积,而筛料组件再对落下的粉料进行震动,可使粉料震松、分散均匀,最终确保均匀铺料的效果；本发明尤其适用于薄层铺料场合,在对松装粉末、流动性差的粉末进行铺料时效果极佳。(The invention discloses a powder spreading device, and belongs to the technical field of spreading equipment in a die pressing process. The powder spreading device comprises a rack, a blanking assembly and a screening assembly, wherein the rack is provided with a material groove; the blanking assembly is positioned below the material groove and comprises a crawler belt blanking plate, a shaft roller, a driving device and a tensioning device; the screening component is located below the blanking component and comprises a screen and a vibrator. According to the invention, the material is discharged in a mode of discharging the powder in a row gradually by skillfully using the material plates under the caterpillar band, so that the powder can be prevented from being accumulated in the material groove, and the material sieving assembly vibrates the falling powder, so that the powder can be loosened and dispersed uniformly, and the effect of uniform material spreading is finally ensured; the invention is especially suitable for thin-layer paving occasions, and has excellent effect when paving loose powder and powder with poor fluidity.)

1. A powder spreader, comprising:

the rack is provided with a material groove;

the blanking assembly is positioned below the material groove and comprises a crawler blanking plate, a shaft roller, a driving device and a tensioning device, the crawler blanking plate is wound on the shaft roller, one end of the crawler blanking plate is fixedly connected with the rack, the other end of the crawler blanking plate is connected with the driving device, and the driving device is used for driving the end of the crawler blanking plate to move towards a first direction; the tensioning device is connected with the shaft roller and is used for providing a tensioning force to move the shaft roller to a second direction, and the second direction is opposite to the first direction; and

the screening component is positioned below the blanking component and comprises a screen and a vibrator, the screen is used for carrying powder, and the vibrator is used for driving the screen to vibrate.

2. The powder spreader of claim 1, wherein the track blanking plate comprises a base cloth and a plurality of strip-shaped pieces connected to the base cloth, the strip-shaped pieces being spaced apart from and parallel to each other;

or, the track blanking plate comprises a base film and a plurality of strip-shaped pieces connected to the base film, and the strip-shaped pieces are arranged in parallel at intervals.

3. The powder spreader of claim 1, further comprising a scraping member disposed above the chute, the scraping member including at least two scraping plates and at least two guide rods disposed on both sides of the chute, the guide rods being disposed parallel to the first direction; the scraper is provided with a through hole, and the guide rod penetrates through the corresponding through hole so that the scraper can slide back and forth along a first direction.

4. The powder spreader of claim 3, wherein the thickness of the bottom of the scraper is in a tapered arrangement.

5. The powder spreader of claim 1, wherein the screen assembly further comprises a screen frame to which the screen is removably attached, the vibrator being attached to the screen frame;

the screen frame includes the rectangle frame, and the four corners department of this rectangle frame hangs through the bolt the below of frame, just the nut of bolt with between the rectangle frame lower surface, the frame with all be provided with the spring between the rectangle frame upper surface, the spring housing is established on the bolt that corresponds.

6. The powder spreader of claim 1, wherein four baffles are disposed on four sides of the top of the frame, and the space surrounded by the four baffles constitutes the chute.

7. The powder spreader of claim 1, further comprising a dust shield open at both ends, the dust shield being enclosed around the screen assembly.

8. The powder spreader of claim 1, wherein the tensioning device comprises a tensioner and a pull cord, one end of the pull cord is connected to the roller, and the other end of the pull cord is connected to the tensioner.

9. Powder paver according to claim 1, characterized in that the drive means comprise an electric motor, a pneumatic cylinder or a hydraulic cylinder.

10. The powder spreader of claim 1, wherein the frame comprises a rectangular frame and four legs disposed at a bottom of the frame.

Technical Field

The invention relates to the technical field of material spreading equipment in a die pressing process, in particular to a powder material spreading device.

Background

Compression moulding is a short term for compression moulding, and generally involves placing a preform in the form of powder, granules, pellets, tablets, or even similar shapes into a heated cavity of a mould, then closing the mould and pressing to shape and cure or vulcanize the preform, and then removing the mould to obtain the finished product. The molding process is simple and low in production cost, and is an important molding process in the industrial production process. With the development of the technology, the market puts forward higher requirements on products, the formed products are more refined, the forming structure becomes complex gradually, and the requirement on the structural precision is higher and higher. This places greater demands not only on the molding equipment, but also on the auxiliary tools used in the molding process, one of which is the spreader, whose main function is to constantly feed the powder material to the mold.

The powder spreading mode on the market at present has a plurality of: for example, a screen type, in which the powder is directly spread on a die after passing through a screen, and a spreader of the screen type is generally accompanied by a vibrator to spread the powder; the hopper type powder spreading device is characterized by comprising a hopper, a powder spreading device and a powder spreading device, wherein the hopper is used for placing powder in the hopper and spreading the powder by controlling a switch of the hopper and a moving path of the hopper; the flat scraping type is characterized in that powder is fully paved in a die cavity or a manufacturing tool through matching with a die, and then a scraper is used for removing redundant powder.

However, the above-mentioned several powder-spreading methods still have the following problems:

screen mesh type: the disadvantage is that the powder tends to move towards the center of the screen during the laying process, which tends to result in uneven laying.

A funnel type: the funnel-type material spreading device has high requirement on the flowability of powder, and powder with poor flowability is easy to form and accumulate at a funnel opening, so that the material spreading is not uniform finally.

Leveling and scraping: the method is more suitable for die pressing of powder with thicker product and more material. For thin products, the powder to be spread is loose, and due to the binding force between the powder and the powder, the powder is easy to gather in the direction of scraping by the scraping mode, so that the spreading is uneven.

In view of the above, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a powder spreading device, which aims to solve the problem of uneven spreading of the existing spreading equipment, achieve the effect of uniform spreading, and particularly has an excellent effect when powder which is loosely packed and has poor flowability is spread.

In order to achieve the purpose, the invention adopts the following technical means:

a powder spreader comprising:

the rack is provided with a material groove;

the blanking assembly is positioned below the material groove and comprises a crawler blanking plate, a shaft roller, a driving device and a tensioning device, the crawler blanking plate is wound on the shaft roller, one end of the crawler blanking plate is fixedly connected with the rack, the other end of the crawler blanking plate is connected with the driving device, and the driving device is used for driving the end of the crawler blanking plate to move towards a first direction; the tensioning device is connected with the shaft roller and is used for providing a tensioning force to move the shaft roller to a second direction, and the second direction is opposite to the first direction; and

the screening component is positioned below the blanking component and comprises a screen and a vibrator, the screen is used for carrying powder, and the vibrator is used for driving the screen to vibrate.

As a further improvement, the crawler belt blanking plate comprises a base cloth and a plurality of strip-shaped pieces connected to the base cloth, wherein the strip-shaped pieces are arranged in parallel at intervals;

or, the track blanking plate comprises a base film and a plurality of strip-shaped pieces connected to the base film, and the strip-shaped pieces are arranged in parallel at intervals.

As a further improvement, the material scraping device further comprises a material scraping assembly arranged above the material groove, the material scraping assembly comprises at least two scraping plates and at least two guide rods, the two guide rods are respectively arranged on two sides of the material groove, and the guide rods are arranged in parallel to the first direction; the scraper is provided with a through hole, and the guide rod penetrates through the corresponding through hole so that the scraper can slide back and forth along a first direction.

As a further improvement, the thickness of the bottom of the scraper is gradually thinned.

As a further improvement, the screening assembly further comprises a screen frame, the screen is detachably connected to the screen frame, and the vibrator is connected with the screen frame; the screen frame includes the rectangle frame, and the four corners department of this rectangle frame hangs through the bolt the below of frame, just the nut of bolt with between the rectangle frame lower surface, the frame with all be provided with the spring between the rectangle frame upper surface, the spring housing is established on the bolt that corresponds.

As a further improvement, four baffles are arranged on four sides of the top of the rack, and the space surrounded by the four baffles forms the trough.

As a further improvement, the screening device further comprises a dust cover with two open ends, and the dust cover is arranged around the screening component in an enclosing mode.

As a further improvement, the tensioning device comprises a tensioner and a pull rope, one end of the pull rope is connected with the shaft roller, and the other end of the pull rope is connected with the tensioner.

As a further improvement, the driving device comprises an electric motor, a pneumatic cylinder or a hydraulic cylinder.

As a further improvement, the rack comprises a rectangular frame body and four support legs arranged at the bottom of the frame body.

Compared with the prior art, the invention has the following technical effects:

the powder spreading device comprises a rack, a blanking assembly and a screening assembly, wherein the rack is provided with a trough, the blanking assembly comprises a lower discharging plate of a crawler and a driving device, the lower discharging plate of the crawler serves as the bottom wall of the trough, powder is flatly laid on the lower discharging plate of the crawler, and then the driving device drives one end of the lower discharging plate of the crawler to move towards a first direction, so that the powder falls in a row; the falling powder stays due to the binding force with the screen mesh, and is vibrated by the material sieving assembly, and finally, a thin layer of powder is uniformly laid in a cavity of the die; according to the invention, the material is discharged gradually by discharging the powder in a row by skillfully using the material plates under the caterpillar band, so that the powder can be prevented from being accumulated in the material groove, and the material sieving assembly vibrates the falling powder, so that the powder can be loosened and dispersed uniformly, and the effect of uniform material spreading is finally ensured.

The invention is especially suitable for thin-layer paving occasions, and has excellent effect when paving loose powder and powder with poor fluidity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows an assembly view of a powder spreader of the present invention;

FIG. 2 shows an exploded perspective view of a powder spreader of the present invention;

FIG. 3 shows a front view of a powder spreader of the present invention;

FIG. 4 shows a partial configuration view of a powder spreader of the present invention (including a blanking assembly, a tensioning assembly);

FIG. 5 shows a cross-sectional view of a track lower discharging plate of a powder spreader of the present invention;

fig. 6 shows a left side view of a powder spreader of the present invention.

Description of the main element symbols:

powder spreader-100; a frame-10; a frame body-11; a leg-12; a baffle-13; a trough-14; a chute-15; a scraper-21; a guide rod-22; a track lower discharging plate-31; base fabric-311; a strip-312; a beam roll-32; a drive device-33; a tensioner-41; a pull cord-42; reel-43; a screen frame-51; screen-52; a vibrator-53; bolt-54; a spring-55; a dust cover-60; a first direction-D; a second direction-E.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1 to 6, the present invention discloses a powder paving machine 100 for thin layer paving, which comprises a frame 10, and a scraping assembly, a blanking assembly and a sieving assembly disposed on the frame 10. The powder spreader 100 is used in a molding process, and is used in conjunction with a mold for spreading powder of a certain thickness into a cavity, and the structure and operation of the mold are not described in detail.

Specifically, in this embodiment, the frame 10 includes a rectangular frame 11 and four legs 12 fixedly disposed at the bottom of the frame 11. The height of each of the four legs 12 is predetermined to ensure that the frame 10 as a whole remains horizontal in the assembled position when mated with a particular mold.

Four sides of the top of the rack 10 are provided with four baffles 13, the four baffles 13 are connected end to end, a space formed by enclosure is used for filling powder, and the space forms a trough 14.

In this embodiment, the scraping assembly is disposed above the trough 14, the scraping assembly includes four scraping plates 21 and four guide rods 22, the four guide rods 22 are two by two and are respectively disposed on two sides of the trough 14, and the guide rods 22 are disposed parallel to the length direction of the trough 14; the scraping plate 21 is rectangular, the length of the scraping plate 21 is equivalent to the width of the trough 14, perforations (not shown) are arranged on the scraping plate, and the number of the perforations is consistent with the number of the guide rods 22. Of course, in other embodiments, the guide rods 22 may be provided in two, three, five, etc. as long as the guide function can be provided for both ends of the scraper 21.

During assembly, the guide rods 22 are inserted into the corresponding through holes, so that the scraper 21 can slide back and forth along the length direction of the trough 14. The scraping assembly is used for scraping the powder laid in the trough 14, and the scraping plate 21 can realize the effect of smoothly sliding under the limit of the guide rod 22, so that the scraping assembly can ensure that the powder has uniform thickness everywhere.

It should be noted that, scrapers 21 with different dimensions can be configured in advance for selection, so that the depth of the part of the scraper 21 extending into the trough 14 can be adjusted, and the purpose of adjusting the thickness of the powder layer laid in the trough 14 can be achieved. The sliding of the scraper 21 can be operated manually, and a power device can be arranged to realize automatic scraping.

Preferably, the thickness of the bottom of the scraper 21 is gradually reduced, which can improve the fineness of the powder scraped by the scraper 21, prevent the powder from being stirred due to the overlarge contact part of the scraper 21 with the powder, and further ensure the scraping effect.

In this embodiment, the blanking assembly is located below the trough 14, and includes a track blanking plate 31, an axle roller 32, a driving device 33, and a tensioning device.

The track blanking plate 31 is wound on the shaft roller 32, one end of the track blanking plate 31 is fixedly connected with the frame 10, the other end of the track blanking plate 31 is connected with the driving device 33, and the driving device 33 is used for driving the end of the track blanking plate 31 to move towards a first direction D; the tensioning device is coupled to the mandrel 32 and is configured to provide a tensioning force to move the mandrel 32 in a second direction E, which is opposite the first direction D.

The first direction D and the second direction E are both in the longitudinal direction of the trough 14, but the first direction D is the forward direction and the second direction E is the reverse direction.

Accordingly, the driving unit 33 is installed at the right end of the frame 10, and the tension unit is installed at the left end of the frame 10. Specifically, the driving device 33 may employ a motor, an air cylinder, or a hydraulic cylinder, and it is understood that a transmission mechanism is further connected between the driving device 33 and one end of the track lower discharging plate 31, for example, the driving device 33 is a rolling gate structure, and may further include a transmission mechanism such as a transmission wheel, a transmission rod, a chain, a rope, etc. in addition to the motor, so that the driving device 33 can drive the end of the track lower discharging plate 31 to move toward the first direction D.

The track blanking plate 31 has a flexible and crimpable characteristic, and particularly in one embodiment, the track blanking plate 31 includes a base cloth 311 and a plurality of strip-shaped pieces 312 connected to the base cloth 311, and the strip-shaped pieces 312 are arranged in parallel and spaced from each other. The strip-shaped pieces 312 can be adhered to the base cloth 311, or can be nailed to the base cloth 311 by nails, and when the prepared crawler belt blanking plate 31 is curled, as long as the speed is properly controlled, powder on one strip-shaped piece 312 can fall off each time of curling, so that the effect of accurate blanking can be achieved.

The width of the strip-shaped pieces 312 may be determined according to the powder particle size of the specific paving material, and generally, the width of the strip-shaped pieces 312 ranges from 0.1cm to 0.8cm, and the distance between two adjacent strip-shaped pieces does not exceed 0.1 cm. The base fabric 311 may be woven, knitted or other flexible fabric. When the material plate 31 is used, the surface of the base cloth 311 is upward to prevent powder from leaking between the strip-shaped pieces 312.

In this embodiment, the shaft roller 32 is slidably mounted on the frame 10, specifically: the inner walls of the two sides of the frame 10 are respectively provided with a sliding slot 15, and the two ends of the shaft roller 32 are respectively clamped and slid in the corresponding sliding slots 15.

The tensioning device comprises a tensioner 41 and a pull rope 42, wherein the tensioner 41 is installed at the left end of the frame 10, one end of the pull rope 42 is connected with the shaft roller 32, and the other end of the pull rope 42 is connected with the tensioner 41, so that the track blanking plate 31 can be always kept tight under the driving of the tensioner 41, namely, the right part of the track blanking plate 31 is always in a flat state.

Specifically, the connection point of the pulling rope 42 and the shaft roller 32 is at the two ends of the shaft roller 32, therefore, a winding shaft 43 is further arranged between the tensioner 41 and the pulling rope 42, and the winding shaft 43 is rotatably mounted at the left end of the frame 10. When the tensioner 41 is operated, the reel 43 is rotated, thereby pulling the shaft roller 32 to move in the second direction E.

The working principle of the whole blanking assembly is described as follows:

in the initial state, under the action of the tensioner 41, the roller 32 is positioned at the lower left of the trough 14, one end of the track blanking plate 31 is in a state of being connected with the driving device 33 by bypassing the roller 32, and at the moment, the powder is laid on the track blanking plate 31, namely the bottom wall of the trough 14;

during blanking, the driving device 33 is started to drive one end of the crawler blanking plate 31 to move towards the first direction D, the shaft roller 32 moves towards the right along the chute 15, and in the process, the tensioner 41 always provides a reaction force to keep the crawler blanking plate 31 in a stretched flat state; along with the curling of the discharge plate 31 under the track, the powder falls down from the trough 14 and falls down row by row, and the width of each row of powder is consistent with that of the strip-shaped sheet 312;

when the driving device 33 is stopped, the shaft roller 32 is moved to the left end initial position by the tensioner 41.

Therefore, the purpose of accurately controlling the falling of the powder is achieved, and the powder falling on the lower layer is uniform and controllable.

In this embodiment, the sieve material subassembly sets up in the below of unloading subassembly, and the sieve material subassembly includes bank of screens 51, screen cloth 52 and vibrator 53, and screen cloth 52 is connected on bank of screens 51 with removable mode, and vibrator 53 installs in frame 10, and vibrator 53 is connected with bank of screens 51, and this vibrator 53 is used for driving bank of screens 51 vibrations.

Specifically, the screen frame 51 includes a rectangular frame, a middle space of the rectangular frame is used for installing the screen 52, four corners of the rectangular frame are suspended below the frame 10 through bolts 54, springs 55 are arranged between nuts of the bolts 54 and the lower surface of the rectangular frame and between the frame 10 and the upper surface of the rectangular frame, and the springs 55 are sleeved on the corresponding bolts 54. The spring 55 provides a buffering function, so that the screen frame 51 is flexibly connected with the frame 10, the vibrator 53 can drive the screen frame 51 to vibrate with a small force, and the vibrating process of the screen frame 51 is more stable.

After the powder falling from the blanking assembly falls into the screen 52, the powder cannot fall immediately and stays on the screen 52 due to the binding force between the powder and the screen 52; then, under the action of the vibrator 53, the powder is further loosened and uniformly dispersed, so that the powder finally falling into the die cavity has a more uniform effect.

The screen 52 and the screen frame 51 are detachably connected, so that the screen 52 with a proper mesh size can be selected according to different powders, generally speaking, the screen 52 with a fine powder is matched with a small mesh, and the screen 52 with a coarse powder is matched with a large mesh, thereby ensuring the uniformity of powder laying.

In summary, the powder spreader 100 of the present invention, by providing the lower discharging plate 31 of the track, allows the powder to fall in a row, on one hand, avoiding the powder from accumulating, and on the other hand, achieving precise control of the amount of the powder falling, the falling powder will stay on the screen 52 due to the bonding force, and then the powder will finally fall into the die cavity through the vibration of the screen assembly, so that the powder spread in this way is uniform and the powder layer is thin. The invention is especially suitable for thin-layer paving occasions, and has excellent uniform paving effect on loose powder and powder with poor fluidity.

Preferably, the powder spreader 100 further comprises a dust cover 60, the dust cover 60 is open at upper and lower ends, and the dust cover 60 is disposed around the sieving assembly for preventing external dust and the like from falling into the powder.

Example two

The present embodiment provides a powder spreader 100, which has substantially the same structure and function effects as the first embodiment, and the difference is that: the track lower discharging plate 31 comprises a base film and a plurality of strip-shaped pieces 312 connected to the base film, and the strip-shaped pieces 312 are arranged in parallel at intervals; the strip 312 may be adhered to the base film or may be nailed to the base film.

The crawler belt blanking plate 31 having such a structure also has flexible and crimpable properties, and can achieve the same functional effects as in the first embodiment.

It is worth mentioning that the base film may be a plastic film, a woven bag film, or the like. When the material discharging plate 31 of the track is used, the surface where the base film is arranged faces upwards to prevent powder from leaking between the strip-shaped pieces 312.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.