Flexible demoulding device and core forming equipment

Abstract

The present invention provides a flexible demoulding device, comprising a flexible substrate and a driving device. The flexible substrate is provided with a plurality of forming holes, the forming holes penetrate through the thickness direction of the flexible substrate, the driving device drives the flexible substrate to continuously move along a limited direction, the driving device comprises a driving wheel, a supporting wheel and a conveyor belt sleeved between the driving wheel and the supporting wheel, the flexible substrate is detachably fixed on the conveyor belt through a plurality of connectors, on the one hand, the demoulding component is no longer a rigid structure, on the other hand, since the flexible substrate is fixed on the conveyor belt through the connector, the flexible substrate can be easily replaced, and at the same time, when the connector is provided with a protrusion and a corresponding slot is provided on the driving wheel, the dimensional accuracy of the forming holes on the flexible substrate can be easily maintained, and the present invention also provides a core forming device using the flexible demoulding device.

Description

Technical Field

[0001] The invention relates to a flexible demoulding device, in particular to a flexible demoulding device and a core forming device for forming a core of a disposable sanitary product. Background Art

[0002] In disposable sanitary products, the core is the main absorbent carrier of liquid, and is usually formed by entangled accumulation of dispersed fluff pulp fibers.

[0003] Existing equipment for forming the core of disposable sanitary products includes a molding assembly, a molding cylinder connected to negative pressure, and a transfer roller for transferring the core from the molding cylinder to a substrate. A mold with a structure corresponding to the shape of the core is fixed on the molding cylinder, and fluff pulp fibers are spread on the mold through the molding assembly to form the core. Usually, the mold is a rigid structure, which is inconvenient to manufacture, install and use. In addition, when the core is removed from the mold, residual absorbent material is likely to appear.

[0004] Therefore, there is a need to develop and implement new and alternative solutions for devices. Summary of the invention

[0005] To this end, the present invention provides a flexible demoulding device to solve the above technical problems.

[0006] A flexible demoulding device is used to form a core body of a disposable sanitary product, comprising a flexible substrate and a driving device. The flexible substrate is provided with a plurality of forming holes, and the forming holes penetrate the thickness direction of the flexible substrate. The driving device is used to drive the flexible substrate to move continuously along a limited direction. The driving device comprises a driving wheel, a supporting wheel and a conveyor belt sleeved between the driving wheel and the supporting wheel. The flexible substrate is detachably fixed on the conveyor belt through a plurality of connectors.

[0007] Furthermore, the flexible substrate is connected end to end along its length direction to form a ring shape.

[0008] Furthermore, the connector includes a clamping block, and a plurality of slots are arranged around the driving wheel, and the positions of the slots correspond to the positions of the clamping block.

[0009] Furthermore, the conveyor belt is a synchronous belt, including a plurality of first teeth, the drive wheel includes a second groove matching the first teeth, the spacing between adjacent grooves is greater than the spacing between adjacent second grooves, and the depth of the groove is greater than the depth of the second groove.

[0010] Furthermore, the clamping block includes a first side surface facing the middle of the conveyor belt, the first side surface is in an inclined state, and the clamping slot includes a first side wall matching the first side surface, and the first side wall is also in an inclined state.

[0011] Furthermore, there is a pair of the clamping blocks, and the first side surfaces of the pair of clamping blocks are inclined in opposite directions, and the pair of first side surfaces are in an "eight" shape.

[0012] The present invention also provides a core forming device, including the flexible demolding device and forming component as described above, wherein the forming component includes a spreading port, at least a portion of the flexible substrate can pass through the spreading port, and when the flexible substrate passes through the spreading port, absorbent material is spread into the forming hole through the spreading port to form a network-like structure.

[0013] Furthermore, an adsorption assembly having an adsorption area connected to the negative pressure system is also provided in the area corresponding to the spreading port, and the flexible substrate passes through the gap between the spreading port and the adsorption area.

[0014] Furthermore, the adsorption assembly also includes a supporting device, the supporting device includes at least one supporting surface, the supporting surface is the upper surface of the substrate, and when the substrate passes through the spreading port, the flexible base is stacked above the substrate.

[0015] Beneficial effects: The present invention provides a flexible demoulding device, comprising a flexible substrate and a driving device. A plurality of forming holes are arranged on the flexible substrate, and the forming holes penetrate through the thickness direction of the flexible substrate. The driving device drives the flexible substrate to continuously move along a limited direction. The driving device comprises a driving wheel, a supporting wheel and a conveyor belt sleeved between the driving wheel and the supporting wheel. The flexible substrate is detachably fixed to the conveyor belt through a plurality of connectors. On the one hand, the demoulding assembly is no longer a rigid structure. On the other hand, since the flexible substrate is fixed to the conveyor belt through the connector, the flexible substrate can be easily replaced. At the same time, when the connector is provided with a protrusion and a corresponding slot is provided on the driving wheel, the dimensional accuracy of the forming holes on the flexible substrate can be easily maintained. The present invention also provides a core forming device using the flexible demoulding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a flexible demoulding device according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of area A in the middle;

[0018] Figure 3 for Figure 1 Middle BB enlarged schematic diagram;

[0019] Figure 4 It is a schematic diagram of a flexible demoulding device according to an embodiment of the present invention being applied to a core forming device;

[0020] Component Description:

[0021] Flexible substrate 10; forming hole 11; conveyor belt 21; driving wheel 22; slot 221; first side surface 2210; support wheel 23; connector 30; screw 31; clamping block 32; first side wall 321; forming assembly 40; substrate 50; adsorption assembly 60. DETAILED DESCRIPTION

[0022] Please refer to Figure 1-Figure 3 ,in, Figure 1 shows a schematic diagram of a flexible demoulding device, Figure 2-Figure 3 The structures of the corresponding positions of the flexible demoulding device are shown respectively, and the present application will be further explained below with reference to these drawings.

[0023] The flexible demoulding device provided in the embodiment of the present invention is generally used in the core forming equipment of disposable sanitary products to form the core. The flexible demoulding device includes a flexible substrate 10 and a driving device.

[0024] At least one forming hole 11 is provided on the flexible substrate 10 , and the forming hole 11 passes through the thickness direction of the flexible substrate 10 . The driving device is used to drive the flexible substrate 10 to move continuously along a defined direction.

[0025] The forming hole 11 is arranged on the flexible substrate 10, and the forming hole 11 has a contour shape and size matching the core shape to be formed. In the present embodiment, only a circular core shape is shown, and other suitable shapes, such as elliptical, oval, waist-shaped, polygonal and other regular or irregular shapes can be set as needed, without limitation here.

[0026] Please refer to Figure 4 , Figure 4 A schematic diagram of applying a flexible demoulding device to a core forming device is shown, and the application of the flexible demoulding device will be described in conjunction with the core forming device, wherein the core forming device includes a forming assembly 40 .

[0027] The molding assembly 40 includes a cavity and a spreading port, and is used to spread the absorbent material through the spreading port. The cavity is a terraced space for receiving and accommodating the absorbent material. The shape of the space can be arranged according to actual needs and is not limited here. The absorbent material can be fiber, such as fluff pulp fiber or artificial fiber or other suitable fiber material, or a mixture of fiber and superabsorbent material (SAP). A fiber dispersion device and a conveying device can be provided upstream of the molding assembly 40 to deliver the absorbent material, such as fiber or a mixture of fiber and superabsorbent material, into the cavity. Preferably, the conveying device is an air delivery device, so that the cavity is in a positive pressure state and the absorbent material is easily spread through the spreading port. Specifically, the fiber dispersion device is a crushing device, which crushes and separates the fiber raw material, such as the fluff pulp board, to form dispersed fibers, so that they can be easily air-delivered and spread, and then entangled and stacked in the molding hole 11 to form a network-like structure.

[0028] The forming hole 11 passes through the thickness direction of the flexible substrate 10. When the part of the flexible substrate 10 with the forming hole 11 moves to the bottom of the spreading port, the absorbent material is spread into the forming hole 11 through the spreading port. The airflow will carry the absorbent material toward the forming hole 11 and fill the forming hole 11 with the absorbent material to form a core structure that matches the contour shape and size of the forming hole 11 and the thickness of the flexible substrate 10.

[0029] Furthermore, an adsorption component 60 having an adsorption area connected to a negative pressure system may be provided in the area corresponding to the diffusion port to further enable the airflow to flow from the diffusion port to the adsorption area. The adsorption component 60 includes an adsorption chamber, which is connected to the negative pressure system and forms a negative pressure in the adsorption chamber. The adsorption chamber has an opening in the direction toward the diffusion port. When the negative pressure system forms a negative pressure in the adsorption chamber, an area adjacent to the opening forms an adsorption area with negative pressure.

[0030] In order to prevent the absorbent material from directly passing through the forming hole 11, the adsorption component 60 also includes a supporting device, which includes a supporting surface, so that the supporting surface and the forming hole 11 together constitute a forming cavity with the supporting surface as the bottom and the bottom wall of the forming hole 11 as the wall, and the absorbent material can be filled into the forming cavity to form a network structure.

[0031] The supporting surface can be the upper surface of a supporting net or the upper surface of the substrate 50. When the supporting surface is the upper surface of the substrate 50, the substrate 50 is configured so that when passing through the dispersing port, the flexible base 10 is stacked on top of the substrate 50 to form a molding cavity with the substrate 50 as the bottom and the side walls of the molding hole 11 as the walls. In this case, the core body will be formed directly on the substrate 50, and there is no need to transfer the core body. It can be understood that the substrate 50 is a porous network sheet so that air can pass through the substrate 50. The substrate 50 can be a non-woven fabric, toilet paper, etc.

[0032] The driving device comprises a driving wheel 22 , a supporting wheel 23 and a conveyor belt 21 sleeved between the driving wheel 22 and the supporting wheel 23 , and the flexible substrate 10 is connected to the conveyor belt 21 .

[0033] The flexible substrate 10 described in the present embodiment includes a length direction and a width direction, and is connected end to end along its length direction to form a ring, so that the driving device can continuously drive the conveyor belt 21 and the flexible substrate 10 connected to the conveyor belt 21 to continuously move. It can be understood that the flexible substrate 10 has a flexible structure, and therefore can also be set to a required shape as needed, such as a ring shape composed of curves and straight lines or a ring shape composed of curves with different curvatures.

[0034] It can be understood that the flexible substrate 10 can be connected to the conveyor belt 21 detachably or non-detachably.

[0035] Furthermore, the flexible substrate 10 is detachably fixed to the conveyor belt 21 through a plurality of connectors 30, the connector 30 includes a clamp 32 and a screw 31, the clamp 32 includes a clamping surface matching the conveyor belt 21, the screw 31 passes through the flexible substrate 10 and the conveyor belt 21 and is threadedly connected to the clamp 32, so that the flexible substrate 10 and the conveyor belt 21 are connected as a whole, and when the conveyor belt 21 moves, the flexible substrate 10 moves synchronously.

[0036] It is understandable that the clamping block 32 can also be fixed on the conveyor belt 21 in other forms, such as buckles and clamps, and the conveyor belt 21 and the flexible substrate 10 are connected into a whole.

[0037] The clamping block 32 is in a raised state on the conveyor belt 21, and a plurality of slots 221 are arranged around the driving wheel 22. The position of the slots 221 corresponds to the position of the clamping block 32. On the one hand, when the driving wheel 22 drives the conveyor belt 21, the clamping block 32 will not interfere. On the other hand, since the flexible substrate 10 is fixed on the conveyor belt 21, when the conveyor belt 21 changes in length unexpectedly, the actual size of the forming hole 11 on the flexible substrate 10 may change. Since the position of the slots 221 on the driving wheel 22 will not change, when the conveyor belt 21 changes in length unexpectedly, the spacing between the clamping blocks 32 will change, so that the clamping block 32 will no longer be able to stably fall into the slots 221, thereby prompting the conveyor belt 21 to be maintained, thereby maintaining the dimensional accuracy of the forming hole 11 on the flexible substrate 10.

[0038] It can be understood that in some other embodiments, a protrusion (not shown) is further provided on the conveyor belt 21 , and the protrusion is integrally formed with the conveyor belt 21 , and the positions of the protrusion, the clamping block 32 and the card slot 221 correspond to each other.

[0039] Further, the conveyor belt 21 is a synchronous belt, including a plurality of first teeth and a first groove, and the driving wheel 22 includes a plurality of second teeth matching the first groove and a second groove matching the first teeth. The driving wheel 22 drives the transmission belt and the flexible substrate 10 connected to the conveyor belt 21 to move through the first teeth and the second grooves, and the second teeth and the first grooves. The clamping grooves 221 are arranged around the driving wheel 22, and the spacing between adjacent clamping grooves 221 is greater than the spacing between adjacent second grooves.

[0040] Preferably, the depth of the slot 221 is greater than the depth of the second slot, the driving wheel 22 comprises a first width, the width of the second tooth is substantially equal to the first width, and the width of the slot 221 is less than or equal to 1 / 2 of the first width.

[0041] It can be understood that the clamping surface described in this embodiment matches the first tooth and the first groove, so that the clamping block 32 can be reliably and stably fixed on the conveyor belt 21.

[0042] Furthermore, the driving device includes a pair of conveyor belts 21, a pair of clamping blocks 32 are respectively arranged on both sides of the flexible substrate 10, and are used to respectively connect the two sides of the flexible substrate 10 with the pair of conveyor belts 21, the conveyor belt 21 includes a middle portion, the clamping block 32 includes a first side surface 2210 facing the middle portion, and the first side surface 2210 is inclined, so that the clamping block 32 is in a step-shaped state, and the inclination directions of the first side surfaces 2210 of the pair of clamping blocks 32 are opposite. For example, in this embodiment, the inclination direction of the clamping block 32 located on the left side is inclined toward the lower left direction, and the inclination direction of the clamping block 32 located on the right side is inclined toward the lower right direction, so that the first side surfaces 2210 of the pair of clamping blocks 32 form an "eight" shape, and a pair of clamping blocks 32 are arranged on the driving wheel 22. The card slot 221 on has a first side wall 321 that matches the first side surface 2210. Similarly, the first side wall 321 is also inclined, and the corresponding first side surface 2210 and the first side wall 321 have the same inclination direction. It can be understood that when there is a position deviation in the horizontal direction of the flexible substrate 10, since the first side surface 2210 and the first side wall 321 are inclined, the clamping block 32 automatically moves downward along the inclination direction of the first side surface 2210 and the first side wall 321 under the action of tension, so that the conveyor belt 21 is attached to the driving wheel 22 and displaced in the lateral direction at the same time, and adjusted to a predetermined position, so that the flexible substrate 10 can always maintain an accurate lateral position, so that the formed core body remains fixed in the lateral position.

[0043] Furthermore, the first side surface 2210 of each clamping block 32 has the same inclination angle as the vertical direction.

[0044] Furthermore, the inclination angle of the first side surface 2210 of each clamping block 32 to the vertical direction is 30°-60°.

[0045] It can be understood that the position of the support wheel 23 should avoid the position of the clamp block 32 to prevent the clamp block 32 from interfering with the movement of the support wheel 23. Preferably, the width of the support wheel 23 is smaller than the width of the driving wheel 22. Of course, in other embodiments, the support wheel 23 can also be set to the same structure as the driving wheel 22.

[0046] Furthermore, there are multiple supporting wheels 23, and at least include supporting wheels 23 arranged upstream of the molding component 40 and supporting wheels 23 arranged downstream of the molding component 40. At least a portion of the flexible substrate 10 is sleeved between the upstream supporting wheel 23 and the downstream supporting wheel 23. The portion of the flexible substrate 10 located between the upstream supporting wheel 23 and the downstream supporting wheel 23 passes through the spreading port. When the driving device drives the flexible substrate 10 to move, the absorbent material can be spread into the molding hole 11 on the flexible substrate 10 through the spreading port, thereby forming a core body with the same shape as the molding hole 11. It can be understood that the portion of the flexible substrate 10 can be limited to a predetermined shape, such as a plane or a curved surface, which is not limited here.

[0047] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A core forming device, characterized in that: The invention comprises a flexible demoulding device, a molding component and an adsorption component. The flexible demoulding device is used to form the core of the disposable sanitary product, and comprises a flexible substrate and a driving device. The flexible substrate is provided with a plurality of molding holes, and the molding holes penetrate the thickness direction of the flexible substrate. The driving device is used to drive the flexible substrate to continuously move along a limited direction. The driving device comprises a driving wheel, a supporting wheel and a conveyor belt sleeved between the driving wheel and the supporting wheel. The flexible substrate is detachably fixed on the conveyor belt through a plurality of connectors. The molding component comprises a spreading port, and at least a part of the flexible substrate can pass through the spreading port. When the flexible substrate passes through the spreading port, the absorbent material is spread into the molding hole through the spreading port to form a network-like structure. The adsorption component comprises a supporting device. The supporting device includes a supporting surface, so that the supporting surface and the forming hole together constitute a forming cavity with the supporting surface as the bottom and the bottom wall of the forming hole as the wall, and the absorbent material is filled into the forming cavity to form a network structure. The supporting surface is the upper surface of the substrate. When the substrate passes through the spreading port, the flexible matrix is ​​stacked above the substrate, and the core will be formed directly on the substrate. The connecting body includes a clamping block, and a plurality of slots are arranged around the driving wheel. The positions of the slots correspond to the positions of the clamping blocks. The conveyor belt is a synchronous belt, including a plurality of first teeth. The driving wheel includes a second slot matching the first teeth. The spacing between adjacent slots is greater than the spacing between adjacent second slots. The depth of the slot is greater than the depth of the second slot. The adsorption component has an adsorption area, and the adsorption area is arranged corresponding to the spreading port.

2. The core forming device according to claim 1, characterized in that: The adsorption component is arranged in a region corresponding to the spreading port, is connected to the negative pressure system and has an adsorption area, and the flexible substrate passes through a gap between the spreading port and the adsorption area.

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