Packing preparation method and apparatus

Abstract

The present invention relates to the technical field of packing preparation, and in particular to a packing preparation method and apparatus. The packing preparation method comprises: spirally laying and stacking a material belt flat on a mold core; placing the mold core wrapped with the material belt in a mold cavity; applying pressure so that the flatly laid and stacked material belt is compression-molded in the mold cavity; and releasing the pressure and taking out a compression-molded packing. According to the packing preparation method and apparatus, the packing is prepared by flatly laying and stacking a spiral material belt on a mold core, and maintaining uninterrupted material continuity between layers, so that when the material belt is loaded into the mold cavity, friction between a side wall and the mold cavity is avoided, and the packing formed by compression thus has uniform density and stable performance.

Description

A filler preparation method and device Technical Field

[0001] The present invention relates to the technical field of filler preparation, and in particular to a filler preparation method and device. Background Art

[0002] The packing seal relies on the axial compression force formed by tightening the gland bolts to cause the packing to produce elastic-plastic deformation, thereby forming a radial compression force against the shaft and the inner wall of the packing cavity to reduce the gap between them and increase the flow resistance of the fluid along the gap.

[0003] Compression-molded fillers are widely used in valve stuffing box seals. During the preparation of compression-molded fillers, rolled graphite tape is cut as needed, then wrapped around a mold core, placed in a mold cavity, and pressed down using a press. When the existing spiral tape is wrapped around the mold core and placed into the mold cavity, it comes into contact with the inner wall of the mold cavity, making it difficult to maintain alignment when placed at the bottom of the mold cavity. This results in uneven density after compression molding, which in turn affects sealing performance. Furthermore, the existing tape requires holding the mold core in one hand and the rolled tape in the other hand during winding, making it easy for it to fall off and time-consuming and labor-intensive. Therefore, the present invention provides a filler preparation method and device. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned existing filler preparation methods, the present invention is proposed.

[0005] Therefore, one of the objects of the present invention is to provide a method for preparing a filler, the purpose of which is to ensure that the density of the material strip is uniform after compression molding.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A method for preparing a filler, comprising: spirally laying a material strip flat on a mold core;

[0007] Place the core wrapped with the material strip into a mold cavity;

[0008] Applying pressure to form the flatly stacked strips into a compression mold within the mold cavity; and,

[0009] Release the pressure and remove the pressed filling.

[0010] As a preferred solution of the filler preparation method of the present invention, the material strip is spirally stacked on the mold core through a flattening device.

[0011] As a preferred solution of the filler preparation method of the present invention, the edge of each layer of the material strip overlaps with the edge of the next layer of the material strip to ensure uniform density distribution during the press molding process.

[0012] The beneficial effects of this method are as follows: the filler is prepared by laying the spiral strip flat on the mold core, and maintaining continuous material between layers. When the strip is loaded into the mold cavity, the friction between the side wall and the mold cavity is avoided, so that the pressed filler has uniform density and stable performance.

[0013] Another object of the present invention is to provide a filler preparation device, the purpose of which is to lay the material strip spirally on the mold core.

[0014] In order to solve the above technical problems, the present invention provides the following technical solutions: a filler preparation device, including a paving device, which includes;

[0015] An installation unit, the installation unit comprising an installation assembly, a mounting rod disposed on the installation assembly, and a mounting post disposed at a top end of the mounting rod; and

[0016] The material spreading unit includes a material guide frame and a mounting frame arranged on the mounting rod, a guide rod arranged on the outside of the mounting frame, and a clamping assembly arranged in the mounting frame.

[0017] The mounting frame is located below the material guide frame;

[0018] The mounting frame is arranged in an arc shape.

[0019] As a preferred embodiment of the filler preparation device of the present invention, the mounting assembly includes a base 1, a base 2 elastically arranged at the front end of the base 1, and a semicircular mounting groove arranged on the base 1 and the base 2;

[0020] The mounting rod is fixedly mounted on a surface of the base;

[0021] The straight sides of the two mounting grooves are opposite to each other.

[0022] As a preferred solution of the filler preparation device described in the present invention, the clamping assembly includes an arc column slidably arranged in the mounting frame, the arc column is elastically connected to the bottom of the mounting frame, a mounting box is arranged at the end of the arc column, a clamping part is arranged inside the mounting box, and a driving part is arranged on the mounting box and connected to the clamping part.

[0023] As a preferred embodiment of the filler preparation device of the present invention, the clamping portion includes a sliding rod slidably disposed in the installation box, a mounting block disposed on a side of the sliding rod, the mounting block being elastically connected to the top of the installation box, a pressure rod disposed on the other side of the sliding rod, and a fixing member disposed on the sliding rod and passing through the installation box;

[0024] The pressure-bearing rod cooperates with the driving part.

[0025] As a preferred solution of the filler preparation device of the present invention, wherein: the fixing member includes a fixing rod slidably arranged on the sliding rod, and a compensation spring arranged between the fixing rod and the sliding rod;

[0026] The fixing rod and the guide rod are located directly above the mounting slot.

[0027] As a preferred solution of the filler preparation device described in the present invention, the driving part includes a driving motor arranged outside the installation box, a transmission member arranged outside the installation box and connected to the driving motor, and a cam arranged inside the installation box and connected to the transmission.

[0028] As a preferred embodiment of the filler preparation device of the present invention, the transmission member includes a first half gear and a second half gear rotatably arranged on the mounting box, a first small half gear and a first long tooth block arranged on the first half gear, and a second small half gear and a second long tooth block arranged on the second half gear;

[0029] The first small half gear is connected to the driving motor, and the mounting shaft of the second half gear passes through the mounting box and is connected to the cam;

[0030] The first half gear and the second half gear are meshed with each other, the first long tooth block is meshed with the second small half gear, and the first small half gear is meshed with the second long tooth block.

[0031] The beneficial effects of the present invention are as follows: the mold core is placed on the installation assembly, and the material strip is fixed on the mold core through the clamping assembly. The mold core is rotated to drive the clamping assembly and the material strip to rotate synchronously with the mold core. As the clamping assembly is cyclically fixed, the material strip is spirally laid flat on the mold core in small batches in sequence, completing the rapid laying of the material strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] FIG1 is a schematic diagram of the overall structure of the filler preparation method and device of the present invention.

[0034] FIG2 is a schematic diagram of the structure of the clamping assembly of the filler preparation method and device of the present invention.

[0035] FIG3 is a schematic diagram of the structure of the clamping portion of the filler preparation method and device of the present invention.

[0036] FIG4 is a schematic diagram of the transmission structure of the filler preparation method and device of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0040] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0041] Example 1 is the first embodiment of the present invention, which provides a method for preparing a filler, the method comprising:

[0042] S1. Lay the material strip spirally and flat on the mold core.

[0043] The material strip is spirally stacked on the mold core through the flattening device M. The mold core is a bottom disk and a cylindrical middle. The material strip is spirally laid on the bottom disk of the mold core, and the edge of each layer of material strip overlaps with the edge of the next layer of material strip to ensure a uniform density distribution during the pressing process.

[0044] S2. Place the core wrapped with the material strip into a mold cavity.

[0045] The mold cavity is a hollow circular tube, and the bottom of the disc with the stacked material strip mold core is inserted into the mold cavity.

[0046] S3. Apply pressure to form the flat and stacked strips into a compression mold in the mold cavity.

[0047] The output end of the press is inserted into the mold cavity to contact the material strip and extrude the material strip. The end of the press is in a circular tube shape, and the output end of the press is sleeved in the middle of the mold core to press the material strip.

[0048] S4. Release the pressure and take out the pressed filler.

[0049] The press stops working and is withdrawn from the mold cavity, and then the mold core and the pressed material strip are taken out of the mold cavity.

[0050] Example 2, referring to FIG. 1 , is a second example of the present invention. This example provides a filler preparation device, including a paving device M, which includes an installation unit 100 and a paving unit 200 .

[0051] Among them, the installation unit 100 includes an installation component 101, a mounting rod 102 arranged on the installation component 101, and a mounting column 103 arranged at the top of the mounting rod 102. The end of the mounting column 103 is threadedly connected to the mounting rod 102, the material strip mounting roller is inserted into the mounting column 103, and the mounting column 103 is connected to the mounting rod 102. The tail of the mounting column 103 is larger than the inner diameter of the material strip mounting roller, and the material strip is installed on the top of the mounting rod 102 to prevent it from falling.

[0052] The material laying unit 200 includes a material guide rack 201 and a mounting rack 202 arranged on the mounting rod 102, a guide rod 203 arranged on the outside of the mounting rack 202, and a clamping assembly 204 arranged in the mounting rack 202, wherein the mounting rack 202 is located below the material guide rack 201; a through groove for the feeding belt to pass through is provided in the material guide rack 201.

[0053] Furthermore, the mounting assembly 101 includes a base 101a, a base 2 101b elastically arranged at the front end of the base 101a, and a semicircular mounting groove 101c arranged on the base 101a and the base 2 101b; the mounting rod 102 is fixedly mounted on the surface of the base 101a; the straight sides of the two mounting grooves 101c are opposite to each other, and the two mounting grooves 101c can be merged into a circle; the base 2 101b is provided with a limit rod slidably inserted into the base 101a, and the base 2 101b and the base 1 101a are connected by a spring 2; the guide rod 203 is located directly above the mounting groove 101c.

[0054] During operation, base 101a is fixed with bolts, then base 2 101b is pulled open, the mold core is placed in the mounting groove 101c, and then base 2 101b is loosened. The mold core is confined in the two mounting grooves 101c, and the disk of the mold core is located below the guide rod 203 and the clamping assembly 204.

[0055] The mounting frame 202 is arranged in an arc shape and is coaxially arranged with the mounting groove 101c. After the mold core is placed in the mounting groove 101c, the end of the strip is pulled out from the winding roller, passes through the guide frame 201, passes through the bottom of the movable guide rod 203, and falls on the bottom plate of the mold core. The end of the strip is fixed by the clamping assembly 204. Then, the mold core is rotated, driving the end of the strip to rotate. The mounting assembly 101 rotates coaxially with the mounting frame 202 and the mold core, and the strip is spirally laid on the bottom plate of the mold core.

[0056] The mold core is rotated slightly and then stopped, and then the clamping assembly 204 is released. The clamping assembly 204 returns to the origin with the mounting frame 202, and then the mold core is rotated even more slightly to ensure that the material strip under the clamping assembly 204 is laid on the mold core and is not tilted and suspended in the air. Then the material strip is clamped and fixed again by the clamping assembly 204, and the mold core is rotated slightly again. After multiple laying, the material strip can be spirally laid on the mold core. After that, the material strip at the bottom of the guide frame 201 is cut off, the mold core is removed, and the remaining material strip is manually laid on the mold core to complete the spiral laying of the material strip on the mold core.

[0057] Example 3, referring to Figures 2-3, is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the clamping assembly 204 includes an arc column 204a slidably set in the mounting frame 202, the arc column 204a is elastically connected to the bottom of the mounting frame 202, a spring three is provided inside the arc column 204a, and is connected to the mounting frame 202 through the spring three, a mounting box 204b is provided at the end of the arc column 204a, a clamping portion 204c is provided inside the mounting box 204b, and a driving portion 204d is provided on the mounting box 204b and connected to the clamping portion 204c.

[0058] The clamping portion 204c includes a sliding rod 204c-1 slidably disposed within the mounting box 204b, a mounting block 204c-2 disposed on the side of the sliding rod 204c-1, the mounting block 204c-2 being elastically connected to the top of the mounting box 204b and connected to the mounting box 204b via a spring 4, a pressure rod 204c-3 disposed on the other side of the sliding rod 204c-1, and a fixing member 204c-4 disposed on the sliding rod 204c-1 and passing through the mounting box 204b.

[0059] The pressure rod 204c-3 cooperates with the driving part 204d, and the driving part 204d squeezes the pressure rod 204c-3, thereby controlling the sliding rod 204c-1 to descend and stretch the spring four. The sliding rod 204c-1 descends and drives the fixing part 204c-4 to descend and contact the material belt for fixing.

[0060] Among them, the end of the material strip is pulled out from the winding roller, passes through the guide frame 201, passes through the bottom of the movable guide rod 203 and falls on the chassis of the mold core, and then is fixed by the fixing part 204c-4 to rotate and flatten the material strip.

[0061] Among them, the fixing member 204c-4 includes a fixing rod 204c-41 slidingly set on the sliding rod 204c-1, and a compensation spring 204c-42 set between the fixing rod 204c-41 and the sliding rod 204c-1; the fixing rod 204c-41 and the guide rod 203 are located directly above the mounting groove 101c.

[0062] When the material strip is spirally laid, the fixed rod 204c-41 contacts the material strip as the sliding block descends, and the fixed rod 204c-41 tightly squeezes the material strip onto the mold core, and the pressure therebetween is greater than the elastic force of spring three. When the fixed rod 204c-41 fixes the material strip onto the mold core, when the mold core is rotated, the mounting box 204b and the arc column 204a can be driven to extend out of the mounting frame 202. When the fixed rod 204c-41 releases the material strip, the arc column 204a drives the mounting box 204b to retract again, so that cyclic fixed covering can be performed.

[0063] When the material strip is covered with multiple layers on the mold core, the pressure between the fixing rod 204c-41 and the material strip is ensured by compressing the compensation spring 204c-42 to prevent the fixing rod 204c-41 from breaking due to the reduction of the downward space of the fixing rod 204c-41.

[0064] Furthermore, the driving part 204d includes a driving motor 204d-1 arranged outside the mounting box 204b, a transmission member 204d-2 arranged outside the mounting box 204b and connected to the driving motor 204d-1, and a cam 204d-3 arranged inside the mounting box 204b and connected to the transmission, wherein the cam 204d-3 includes a large circle side 204d-31 and a small circle side 204d-32. When the large circle side 204d-31 rotates and abuts against the pressure rod 204c-3, the fixed rod 204c-41 is squeezed and the spring four is stretched, and the sliding rod 204c-1 and the fixed rod 204c-41 descend. When the small circle side 204d-32 abuts against the pressure rod 204c-3, the spring four is retracted, and the sliding rod 204c-1 and the fixed rod 204c-41 rise.

[0065] The transmission member 204d-2 includes a first half gear 204d-21 and a second half gear 204d-22 rotatably mounted on the mounting box 204b, a first small half gear 204d-23 and a first long tooth block 204d-24 mounted on the first half gear 204d-21, and a second small half gear 204d-25 and a second long tooth block 204d-26 mounted on the second half gear 204d-22.

[0066] The first small half gear 204d-23 is connected to the driving motor 204d-1, and the mounting shaft of the second half gear 204d-22 passes through the mounting box 204b and is connected to the cam 204d-3;

[0067] The first half gear 204d-21 is meshed with the second half gear 204d-22, the first long tooth block 204d-24 is meshed with the second small half gear 204d-25, and the first small half gear 204d-23 is meshed with the second long tooth block 204d-26.

[0068] When the first half gear 204d-21 and the second half gear 204d-22 are engaged, the cam 204d-3 rotates smoothly, and the large circle side 204d-31 is against the pressure rod 204c-3. When the first long tooth block 204d-24 is engaged with the second small half gear 204d-25, the cam 204d-3 rotates rapidly, and the small circle side 204d-32 cooperates with the pressure rod 204c-3. When the first small half gear 204d-23 is engaged with the second long tooth block 204d-26, the cam 204d-3 rotates slowly, and is converted from the small circle side 204d-32 to the large circle side 204d-31 to cooperate with the pressure rod 204c-3.

[0069] First, the first long tooth block 204d-24 meshes with the second small half gear 204d-25, and the fixed rod 204c-41 does not contact the material strip. Then, the first small half gear 204d-23 meshes with the second long tooth block 204d-26, and the fixed rod 204c-41 descends to squeeze and fix the material strip. Finally, the first half gear 204d-21 and the second half gear 204d-22 mesh, and the fixed rod 204c-41 continues to squeeze the material strip. At this time, the mold core can be rotated slightly to spirally cover the material strip on the mold core, and the fixed rod 204c-41 is away from the mounting frame 202.

[0070] When the first long tooth block 204d-24 engages with the second small half gear 204d-25 again, the fixed rod 204c-41 does not squeeze the material strip, and the fixed rod 204c-41 returns to the mounting frame 202. After the first small half gear 204d-23 engages with the second long tooth block 204d-26, the fixed rod 204c-41 descends again to squeeze and fix the material strip. At this time, the mold core can be reversed with a smaller amplitude to ensure that the fixed rod 204c-41 does not contact the suspended material strip when it descends. As the transmission part 204d-2 continues to work, the mold core can be rotated with a small amplitude multiple times to spirally cover the material strip.

[0071] The remaining structures are the same as those of Example 2.

[0072] The usage process is as follows: place the mold core into the installation groove 101c, pull the end of the material strip out from the winding roller, and after passing through the guide rack 201, pass through the bottom of the movable guide rod 203 and fall on the chassis of the mold core, and pull the material strip to be located under the fixed rod 204c-41, and then turn on the drive motor 204d-1 to drive the cam 204d-3 to rotate, and cooperate with the rotation of the mold core and the extension and retraction of the arc column 204a to automatically spirally lay the material strip. After the material strip is laid, cut off the material strip at the bottom of the guide rack 201, remove the mold core, and manually lay the remaining material strip on the mold core to complete the rapid spiral laying and stacking of the material strip on the mold core.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for preparing a filler, characterized in that: include, Lay the material strip spirally and flat on the mold core; Place the core wrapped with the material strip into a mold cavity; Applying pressure causes the flatly stacked strips to be pressed into shape within the mold cavity; as well as, Release the pressure and remove the pressed filling.

2. The method for preparing a filler according to claim 1, wherein: The material strip is spirally stacked on the mold core by a flattening device (M).

3. The method for preparing a filler according to claim 2, wherein: The edges of each layer of the material strip overlap with the edges of the next layer of the material strip to ensure a uniform density distribution during the press forming process.

4. A filler preparation device, characterized in that: Comprising the tiling device (M) as claimed in claim 2, comprising; A mounting unit (100), the mounting unit (100) comprising a mounting assembly (101), a mounting rod (102) disposed on the mounting assembly (101), and a mounting post (103) disposed at a top end of the mounting rod (102); and, A material spreading unit (200), comprising a material guide frame (201) and a mounting frame (202) arranged on the mounting rod (102), a guide rod (203) arranged outside the mounting frame (202), and a clamping assembly (204) arranged in the mounting frame (202); The mounting frame (202) is located below the material guide frame (201); The mounting frame (202) is arranged in an arc shape.

5. The filler preparation device according to claim 4, characterized in that: The mounting assembly (101) includes a base 1 (101a), a base 2 (101b) elastically arranged at the front end of the base 1 (101a), and a semicircular mounting groove (101c) arranged on the base 1 (101a) and the base 2 (101b); The mounting rod (102) is fixedly mounted on the surface of the base (101a); The straight sides of the two mounting grooves (101c) are opposite to each other.

6. The filler preparation device according to claim 5, characterized in that: The clamping assembly (204) includes an arc column (204a) slidably arranged in the mounting frame (202), the arc column (204a) is elastically connected to the bottom of the mounting frame (202), a mounting box (204b) arranged at the end of the arc column (204a), a clamping portion (204c) arranged inside the mounting box (204b), and a driving portion (204d) arranged on the mounting box (204b) and connected to the clamping portion (204c).

7. The filler preparation device according to claim 6, characterized in that: The clamping portion (204c) comprises a sliding rod (204c-1) slidably arranged in the installation box (204b), a mounting block (204c-2) arranged on the side of the sliding rod (204c-1), the mounting block (204c-2) being elastically connected to the top of the installation box (204b), a pressure rod (204c-3) arranged on the other side of the sliding rod (204c-1), and a fixing member (204c-4) arranged on the sliding rod (204c-1) and passing through the installation box (204b); The pressure rod (204c-3) cooperates with the driving part (204d).

8. The filler preparation device according to claim 7, characterized in that: The fixing member (204c-4) comprises a fixing rod (204c-41) slidably arranged on the sliding rod (204c-1), and a compensation spring (204c-42) arranged between the fixing rod (204c-41) and the sliding rod (204c-1); The fixing rod (204c-41) and the guide rod (203) are located directly above the installation groove (101c).

9. The filler preparation device according to claim 8, characterized in that: The driving unit (204d) includes a driving motor (204d-1) arranged outside the installation box (204b), a transmission member (204d-2) arranged outside the installation box (204b) and connected to the driving motor (204d-1), and a cam (204d-3) arranged inside the installation box (204b) and connected to the transmission member (204d-2).

10. The filler preparation device according to claim 9, characterized in that: The transmission member (204d-2) comprises a first half gear (204d-21) and a second half gear (204d-22) rotatably arranged on the installation box (204b), a first small half gear (204d-23) and a first long tooth block (204d-24) arranged on the first half gear (204d-21), and a second small half gear (204d-25) and a second long tooth block (204d-26) arranged on the second half gear (204d-22); The first small half gear (204d-23) is connected to the driving motor (204d-1), and the mounting shaft of the second half gear (204d-22) passes through the mounting box (204b) and is connected to the cam (204d-3); The first half gear (204d-21) and the second half gear (204d-22) are meshed, the first long tooth block (204d-24) is meshed with the second small half gear (204d-25), and the first small half gear (204d-23) is meshed with the second long tooth block (204d-26).

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