CN107814228A - A kind of adsorption roller of axial vacuum control - Google Patents

Abstract

The suction roller with axial negative pressure control provided by the present invention includes a mandrel, a roller body and a plurality of sealing blocks arranged on the surface of the mandrel along the axial direction of the mandrel, and the gap between the mandrel and the roller body is Sliding reciprocatingly in the axial direction to synchronously drive multiple sealing blocks to reciprocate in the axial direction, so that the adsorption chamber can reciprocate between avoiding the adsorption hole group and connecting the adsorption hole group. The groups are at the same position, so that the adsorption chamber opens the negative pressure control effect on the adsorption holes; when the adsorption chamber moves axially to the inner wall between the two adjacent adsorption hole groups, the top cavity of the adsorption chamber and the inner wall A sealed space is formed between them, so that the adsorption chamber closes the negative pressure control effect on the adsorption holes.

Description

A suction roller controlled by axial negative pressure

technical field

The invention relates to the technical field of household paper machinery and equipment, in particular to a suction roller controlled by axial negative pressure.

Background technique

Existing roller bodies with vacuum adsorption are often used in the field of mechanical processing of thin sheet materials such as toilet paper, and existing adsorption rollers are usually integral or split structures. A rewinding in Chinese patent 104176535A The rewinding roller of the machine, which is provided with a plurality of slit-shaped suction ports on the rewinding roller, thereby increasing the suction force of the suction port, no matter the way of setting the suction cavity at the end of the roll body, Or the coaxially rotating mandrel and the roller body are all used to generate negative pressure for absorbing the sheet material at the suction port on the surface of the adsorption roller through an external vacuum device, while the existing adsorption roller is in the working process. The external air valve switch is used to control the negative pressure state accordingly, but when the air valve is closed, the air will flow into the air flow channel to communicate with the atmosphere; and when the air valve is opened, the vacuuming equipment often takes a certain amount of time The negative pressure at the suction port can reach the desired value only by pumping air through the airflow channel. In production, it is necessary to switch the negative pressure state at the suction port frequently and quickly, which makes it difficult to make the suction in a short time. The adsorption force at the mouth reaches the required value, which affects the adsorption effect and production quality; in order to solve this problem, the existing manufacturers often raise the negative pressure value in the vacuum chamber to a higher value before the air valve is closed , to offset the influence of the outside air on the negative pressure value during the closing of the air valve, so that the required adsorption force can be quickly achieved after the air valve is opened. This method not only leads to large air consumption, but also requires a higher power vacuum pumping equipment, increase the production cost, and it is difficult to accurately control the negative pressure value.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art, and provide a suction roller with low cost, low energy consumption and accurate switch axial negative pressure control.

In order to achieve the above object, the present invention provides a suction roller controlled by axial negative pressure, which includes a mandrel, a roller body and a plurality of sealing blocks arranged on the surface of the mandrel along the axial direction of the mandrel, wherein the The mandrel is coaxially connected with the roller body, and the mandrel has an air extraction channel inside, and the air extraction channel communicates with a plurality of axially arranged air extraction holes on the outer surface of the mandrel, and the cylindrical surface of the roller body There are multiple rows of adsorption hole groups arranged in the axial direction and sequentially aligned with a plurality of suction holes, wherein each row of the adsorption hole group is composed of a plurality of adsorption holes arranged along the circumferential direction of the roller body; each of the Each sealing block is formed with an adsorption cavity for connecting the aligned adsorption hole groups and air extraction holes. The top of the sealing block is closely attached to the inner wall of the roller, and the mandrel and the roller body slide reciprocally in the axial direction to synchronize Drive a plurality of sealing blocks to reciprocate in the axial direction, so that the adsorption chamber can switch back and forth between avoiding the adsorption hole group and connecting the adsorption hole group. When the adsorption chamber axially moves to a position aligned with the adsorption hole group, Thus, the adsorption chamber opens the negative pressure control effect on the adsorption holes; when the adsorption chamber axially moves to the inner wall between two adjacent adsorption hole groups, a sealed space is formed between the top cavity of the adsorption chamber and the inner wall, thereby The negative pressure control effect of the adsorption chamber closing on the adsorption hole.

Further, when the adsorption chamber is turned on to control the negative pressure of the adsorption holes, the roller body and the mandrel rotate relatively so that each adsorption hole on the roller body rotates to a position corresponding to the mouth of the adsorption chamber top, so as to be compatible with the adsorption hole. The chamber and the suction hole are connected to form a negative pressure.

Further, when the adsorption chamber closes the negative pressure control function on the adsorption hole, the adsorption chamber maintains a state of accumulating pressure.

Further, a drive unit for driving the core shaft to reciprocate in the axial direction is also included.

Further, the width of the opening at the top of the adsorption chamber is larger than the diameter of the adsorption hole.

Further, the adsorption chamber moves by a cavity opening width with the movement of the mandrel so that the adsorption chamber is staggered from the adsorption hole group.

The present invention adopts the above-mentioned scheme, and its beneficial effect is that the mandrel reciprocates axially and synchronously drives a plurality of sealing blocks to reciprocate axially, so that the adsorption chamber reciprocates between the avoiding adsorption hole group and the connecting adsorption hole group Switching, thereby realizing the negative pressure control effect of the adsorption chamber opening or closing on the adsorption hole; at the same time, using the adsorption chamber to avoid the adsorption hole group to form a sealed space with the inner wall of the roller, thereby preventing the outside air from entering the adsorption chamber to negative pressure. At the same time, the adsorption chamber continues to accumulate pressure in the sealed space, so that when the adsorption chamber is switched to the connected adsorption hole group, the required negative pressure value can be instantly reached, so as to better adsorb the sheet material.

Description of drawings

Fig. 1 is a sectional view of a suction roller of the present invention.

Fig. 2 is a partial enlarged view of the group of connected adsorption holes in the adsorption chamber of the present invention.

Fig. 3 is a partial enlarged view of the adsorption chamber of the present invention avoiding the adsorption hole group.

Fig. 4 is a schematic structural view of the sealing block of the present invention.

FIG. 5 is a schematic cross-sectional structure diagram of B-B in FIG. 1 .

Among them, 1- mandrel, 11- suction hole, 12- suction channel, 13- vacuum suction port, 2- roller body, 21- adsorption hole group, 211- adsorption hole, 3- bearing, 4- sealing block, 41- Adsorption chamber, 5-drive unit.

Detailed ways

The present invention will be further described below in conjunction with specific examples.

Referring to accompanying drawings 1 to 5, a suction roller controlled by axial negative pressure includes a mandrel 1, a roller body 2 and a plurality of sealing blocks arranged on the surface of the mandrel 1 along the axial direction of the mandrel 1 4. Among them, the two ends of the mandrel 1 rotate coaxially with the roller body 2 through the bearing 3, and the mandrel 1 adopts an integral structure. There are a plurality of axially arranged air pumping holes 11 on the outer surface to communicate with each other. The two ends of the air pumping channel 1212 are respectively connected with vacuum suction ports 13 and vacuum pumping equipment (not shown in the figure). On the cylindrical surface of the cabinet, there are multiple rows of adsorption hole groups 21 arranged in the axial direction and aligned with a plurality of evacuation spaces at a time, wherein each row of adsorption hole groups 21 has a plurality of adsorption holes arranged along the circumferential direction of the roller body 2. The hole 211 consists of a plurality of adsorption holes 211 for absorbing the sheet material to be processed.

Referring to accompanying drawings 3 and 4, in this embodiment, each sealing block 4 is formed with an adsorption chamber 41 for communicating with the aligned adsorption hole groups 21 and air extraction holes 11; secondly, the top of the adsorption chamber 41 The width of the cavity is larger than the diameter of the adsorption hole 211 . The top of the sealing block 4 is in close contact with the inner wall of the roller body 2 . The sealing block 4 arranged in the axial direction realizes the function of reducing the volume of the adsorption chamber 41, and reduces the suction area of the mandrel 1, effectively reducing the adsorption radial force of the adsorption chamber 41 on the roller body 2 and the mandrel 1 during the working process , thereby improving the stability of the adsorption roller.

Referring to accompanying drawings 2 and 3, in this embodiment, the mandrel 1 and the roller body 2 slide reciprocatingly in the axial direction to synchronously drive a plurality of sealing blocks 4 to reciprocate in the axial direction, so that the adsorption chamber 41 can avoid The open adsorption hole group 21 and the connected adsorption hole group 21 are reciprocally switched. The mandrel 1 in this embodiment is also equipped with a drive unit 5 that drives it to reciprocate in the axial direction (for ease of understanding, the drive unit 5 includes a servo motor and Cam, wherein the cam is set on the output end of the servo motor, one end of the mandrel 1 is extended and hinged with the cam, and the cam is driven by the servo motor to rotate so that the cam drives the mandrel 1 to move axially; in addition, the drive unit 5 can also be Telescopic cylinder, the output end of the telescopic cylinder is connected to one end of the mandrel 1, and the mandrel 1 is driven to move axially through the telescopic action of the telescopic cylinder. In this application, it is not limited to the above two driving methods, and other A drive unit 5 that drives the spindle 1 to move in the axial direction). When the adsorption chamber 41 axially moves to the opposite position aligned with the adsorption hole group 21, the adsorption chamber 41 opens the negative pressure control effect on the adsorption holes 211, that is, the roller body 2 and the mandrel 1 rotate relatively so that the roller body Each adsorption hole 211 on the 2 is rotated to the position corresponding to the mouth of the top of the adsorption chamber 41, so as to communicate with the adsorption chamber 41 and the suction hole 11 to form a negative pressure for adsorbing the sheet material. When the desired adsorption cavity 41 moves axially to the inner wall between two adjacent adsorption hole groups 21, wherein, the adsorption cavity 41 of this embodiment moves a cavity width with the movement of the mandrel 1 so that the adsorption cavity 41 is staggered. The adsorption hole group 21 makes a sealed space between the top cavity and the inner wall of the adsorption chamber 41, so that the adsorption chamber 41 closes the negative pressure control effect on the adsorption holes 211. At the same time, because the adsorption chamber 41 is a sealed space, it effectively Prevent outside air from entering the adsorption chamber 41 and avoid affecting the negative pressure value of the adsorption chamber 41. At this time, the vacuum equipment can continue to work to keep the adsorption chamber 41 in a state of accumulating pressure, and the adsorption can be controlled according to actual production requirements. The negative pressure value in the chamber 41; secondly, when the adsorption chamber 41 is switched from avoiding the adsorption hole group 21 to connecting the adsorption hole group 21, due to the external air will be filled in the adsorption hole 211 during the period of closing the negative pressure control effect, thus At the moment when the adsorption cavity 41 communicates with the adsorption hole 211, the air in the adsorption hole 211 will be extracted instantly under the action of negative pressure to generate a negative pressure at the adsorption hole 211. At the same time, due to the small volume of each adsorption hole 211, it can accommodate There is very little air, so that the amount of gas extracted by the adsorption chamber 41 is very small, and will not affect the negative pressure value of the adsorption chamber 41, thereby realizing that the adsorption hole 211 can instantly reach the required negative pressure state, thereby generating the required Adsorption force is required, especially the negative pressure state of the adsorption hole 211 is frequently switched in a short period of time to ensure that the adsorption hole 211 can instantly generate a negative pressure that meets the requirements and is used to adsorb the sheet material. This method effectively solves the problems of large air consumption, high vacuum equipment power, and high energy consumption that exist in traditional air valve control.

The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, uses the technical content disclosed above to make more possible changes and modifications to the technical solution of the present invention, or the modification is an equivalent embodiment of the present invention. Therefore, all equivalent and equivalent changes made according to the ideas of the present invention that do not deviate from the technical solutions of the present invention shall fall within the scope of protection of the present invention.

Claims (6)

1. a kind of adsorption roller of axial vacuum control, includes mandrel（1）And roll body（2）It is and multiple along mandrel（1）Axial cloth It is placed in mandrel（1）Sealing block on surface（4）, wherein, the mandrel（1）With roll body（2）Rotate coaxially connection, the mandrel （1）It is interior that there is bleed-off passage（12）And the bleed-off passage（12）With mandrel（1）Multiple axially aligned take out is provided with outer surface Stomata（11）Communicate, the roll body（2）Be provided with the face of cylinder it is multiple rows of axially aligned and successively with multiple aspirating holes（11）Relatively Neat adsorption hole group（21）, wherein, often arrange the adsorption hole group（21）By multiple along roll body（2）The adsorption hole of circumferencial direction arrangement （211）Composition；Each sealing block（4）Form an adsorbent chamber（41）For connecting the adsorption hole group to align（21）With Aspirating hole（11）, the sealing block（4）Top and roll body（2）Inwall is mutually brought into close contact, it is characterised in that：The mandrel（1）With Roll body（2）Between reciprocatingly slide vertically so as to the multiple sealing blocks of synchronous drive（4）Move back and forth vertically, so that adsorbent chamber （41）Avoiding adsorption hole group（21）And connection adsorption hole group（21）Between back and forth switch, when the adsorbent chamber（41）Axial movement To with adsorption hole group（21）The opening position to align, so as to adsorbent chamber（41）Open to adsorption hole（211）Vacuum cavitations effect； When the adsorbent chamber（41）Move axially to two adjacent adsorption hole groups（21）Between inwall at, the adsorbent chamber（41）Top chamber Sealing space is formed between mouth and inwall, so as to adsorbent chamber（41）Close to adsorption hole（211）Vacuum cavitations effect.

A kind of 2. adsorption roller of axial vacuum control according to claim 1, it is characterised in that：The adsorbent chamber（41）Open Open to adsorption hole（211）Vacuum cavitations effect when, the roll body（2）With mandrel（1）Relatively rotate so that roll body（2）It is upper each Adsorption hole（211）Turn to adsorbent chamber（41）The corresponding position of the accent at top, could and adsorbent chamber（41）And aspirating hole （11）Connection forms negative pressure.

A kind of 3. adsorption roller of axial vacuum control according to claim 1, it is characterised in that：The adsorbent chamber（41）Close Close to adsorption hole（211）Vacuum cavitations effect when, the adsorbent chamber（41）Keep the state of pressure accumulation.

A kind of 4. adsorption roller of axial vacuum control according to claim 1, it is characterised in that：Also include driving mandrel （1）The driver element moved back and forth vertically（5）.

A kind of 5. adsorption roller of axial vacuum control according to claim 1, it is characterised in that：The adsorbent chamber（41）Top The width of the accent in portion is more than adsorption hole（211）Aperture.

A kind of 6. adsorption roller of axial vacuum control according to claim 5, it is characterised in that：The adsorbent chamber（41）With Mandrel（1）Movement and a mobile accent width so that adsorbent chamber（41）Stagger adsorption hole group（21）.