CN209832802U - Paper cover nest edge die - Google Patents

Abstract

The utility model discloses a paper cover nest edge mould, which comprises a nest edge fixed mould used for conveying and positioning paper covers and a nest edge movable mould group used for nesting edges of the paper covers, wherein the nest edge fixed mould is provided with a cylindrical mould cavity used for accommodating the paper covers, and the side wall of the paper cover extends out of the cylindrical mould cavity when the paper cover is positioned in the cylindrical mould cavity; the nest edge movable module comprises a nest bottom prepressing die and a nest bottom die holder which are coaxially and sequentially arranged from inside to outside, and the nest bottom die holder is provided with an annular groove for aligning the nest bottom of the side wall of the paper cover; when the nest side fixed die and the nest side movable die set work relatively, the nest bottom prepressing die and the nest bottom die holder are matched with the nest side fixed die in sequence through the driving part, the nest bottom prepressing die abuts against the bottom of the paper cover to limit, and the annular groove of the nest bottom die holder abuts against the side wall of the paper cover to inwards bend the nest bottom. The utility model discloses a to the good location of paper lid and orderly nest limit, the even nest limit of workable play round, the standardized manufacturing of being convenient for is favorable to improving the off-the-shelf quality of paper lid processing.

Description

Paper cover nest edge die

Technical Field

The utility model relates to a mould especially relates to a paper lid nest limit mould.

Background

For the catering industry, a paper cup or a paper bowl can be used for containing drinks and foods, and the paper cup or the paper bowl can be matched with a plastic cover for use, so that the drinks and the foods can be conveniently used for heat preservation, packaging, storage and the like. However, as environmental awareness increases, plastic caps are being replaced gradually, and the replacement is a more environmentally friendly paper cap. At present, the processing machinery for paper covers is less; in the paper cover processing process, raw materials are required to be processed into sheet-shaped paper pieces or strip-shaped paper pieces firstly, then the paper pieces are conveyed to a folding die through a conveying mechanism, the periphery of the sheet-shaped paper pieces are folded towards one side, the periphery of the strip-shaped paper pieces are cut to form the sheet-shaped paper pieces, and then the folding is carried out, so that the whole body becomes a column shape; after the edge folding is finished, the cylindrical paper cover is conveyed to the next station, and the lower part of the side wall of the paper cover is bent inwards by a nest edge die to nest edges; in the inward bending process, the whole paper cover needs to be kept well positioned, and the lower part of the side wall is bent, so that the mold is required to stably and smoothly bend, and the phenomenon that the whole paper cover is deformed in the bending process to influence the yield is avoided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, providing a simple structure, stabilizing the nest limit to the paper lid through composite construction, guarantee the paper lid nest limit mould of nest limit effect.

The utility model adopts the following technical scheme: a paper cover nest edge mould comprises a nest edge fixed mould for conveying and positioning a paper cover and a nest edge movable mould group for nesting the paper cover, wherein the nest edge fixed mould is provided with a cylindrical mould cavity for accommodating the paper cover, and the side wall of the paper cover extends out of the cylindrical mould cavity when the paper cover is positioned in the cylindrical mould cavity; the nest edge movable module comprises a nest bottom prepressing die and a nest bottom die holder which are coaxially and sequentially arranged from inside to outside, and the nest bottom die holder is provided with an annular groove for aligning the nest bottom of the side wall of the paper cover; when the nest side fixed die and the nest side movable die set work relatively, the nest bottom prepressing die and the nest bottom die holder are matched with the nest side fixed die in sequence through the driving part, the nest bottom prepressing die abuts against the bottom of the paper cover to limit, and the annular groove of the nest bottom die holder abuts against the side wall of the paper cover to inwards bend the nest bottom.

As an improvement, a first elastic piece is arranged between the nest bottom prepressing die and the nest bottom die holder, the nest bottom die holder pushes the nest bottom prepressing die to move synchronously through the first elastic piece when moving, and after the nest bottom prepressing die abuts against the bottom of the paper cover, the nest bottom die holder compresses the first elastic piece when moving continuously.

As an improvement, the back part of the nest bottom prepressing die is provided with a prepressing mandrel, the back part of the nest bottom die holder is provided with a nest bottom mandrel, the prepressing mandrel can axially move to penetrate through the nest bottom mandrel, and the first elastic piece is sleeved on the prepressing mandrel, and the two ends of the first elastic piece are respectively limited by the nest bottom prepressing die and the nest bottom die holder.

As an improvement, the nest edge movable module further comprises a pushing seat, the nest bottom core shaft can axially movably penetrate through the pushing seat, a second elastic piece is arranged between the pushing seat and the nest bottom die holder, and the pushing seat is driven by the driving part and pushes the nest bottom die holder to synchronously move through the second elastic piece; the periphery of the socket bottom die holder is provided with an abutting surface abutting against the periphery of the socket side fixed die, and when the abutting surface abuts against the socket side fixed die, the pushing seat is pushed to continue to advance to compress the second elastic piece.

As an improvement, the nest side fixed die is positioned at the upper part, the nest side movable die set is positioned at the lower part, and the nest side movable die set advances upwards to be matched with the nest side fixed die.

As an improvement, the outer side wall of the socket edge annular groove is higher than the inner side wall, and the outer side wall and the inner side wall are obliquely arranged and are connected in an arc shape at the bottom of the annular groove.

As an improvement, the nest side fixed die comprises a fixed die body and a pushing assembly, wherein a cylindrical die cavity is arranged at the lower part of the fixed die body, the pushing assembly extends into the cylindrical die cavity from the upper part of the fixed die body and can move along the axial direction, and a channel arranged on the pushing assembly is connected with an external air suction mechanism and used for sucking and positioning the paper cover.

As an improvement, the pushing assembly comprises a pushing plate and a guide shaft which are connected with each other, the pushing plate is cylindrical and is contained in a cylindrical die cavity, the pushing plate is matched with the cross section of the cylindrical die cavity and is used for abutting against a paper cover, the guide shaft penetrates through the fixed die body to move axially, and a channel is axially arranged along the guide shaft and communicated to one end of the pushing plate.

As an improvement, a third elastic piece is sleeved on the guide shaft, the upper end of the third elastic piece is abutted with a step arranged on the guide shaft, the lower end of the third elastic piece is abutted with the fixed die body, and the third elastic piece is compressed when the guide shaft drives the push plate to move towards the opening of the cylindrical die cavity; the restoring force of the third elastic part drives the push plate to return to the cavity bottom of the cylindrical cavity.

As an improvement, the fixed die body and the socket bottom prepressing die are respectively provided with an air vent, the air vent of the fixed die body penetrates through the cylindrical die cavity and the external space, and the air vent of the socket bottom prepressing die penetrates through and presses the surface and the external space of the paper cover.

The utility model has the advantages that: the nest side fixed die can be arranged on the conveying mechanism, the ream cover can be conveyed to different procedures through conveying, and nest side is carried out when the nest side fixed die is conveyed to be opposite to the nest side movable die set; when the paper cover is subjected to the nesting process, the nesting bottom prepressing die and the nesting bottom die holder are driven from inside to outside to act on the paper cover, the nesting bottom prepressing die positions the paper cover, the position of the paper cover in the cylindrical die cavity is stabilized on the basis of the nesting side fixed die, and nesting side operation is facilitated; then, in the process that the nest base die holder approaches the nest side fixing die, the annular groove abuts against the side wall of the paper cover, and the side wall of the paper cover bends the nest side towards the inner wall along the outer wall of the annular groove, so that the nest side effect shown in figure 5 is realized. The utility model can process a circle of even nest edges by well positioning the paper cover and orderly nest edges, thereby facilitating the subsequent processes to continuously process and finish the even compaction of the paper cover edge; the quality of the finished product of the paper cover is integrally improved, the appearance defect is avoided, and the paper cup or the paper bowl can be well adapted.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic cross-sectional structure view of a longitudinal section of the present invention.

Fig. 3 is an enlarged view of the structure at M in fig. 2.

Fig. 4 is a schematic perspective view of the movable module at the edge of the nest according to the present invention.

Fig. 5 is a schematic view of the sectional structure of the front and rear longitudinal sections of the paper cover nest edge of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1, 2, 3, 4 and 5, it is a specific embodiment of the paper-covered nest-edge mold of the present invention. The embodiment comprises a nest edge fixed die 1 for conveying and positioning the paper cover and a nest edge movable die set 2 for nesting the paper cover, wherein the nest edge fixed die 1 is provided with a cylindrical die cavity 11 for accommodating the paper cover, and the side wall of the paper cover extends out of the cylindrical die cavity 11 when the paper cover is positioned in the cylindrical die cavity 11; the nest edge movable module 2 comprises a nest bottom prepressing die 21 and a nest bottom die holder 22 which are coaxially and sequentially arranged from inside to outside, and the nest bottom die holder 22 is provided with an annular groove 221 for aligning the nest bottom of the side wall of the paper cover; when the nest side fixed die 1 and the nest side movable die set 2 work relatively, the nest bottom prepressing die 21 and the nest bottom die holder 22 are matched with the nest side fixed die 1 in sequence through the driving part, the nest bottom prepressing die 21 abuts against the bottom of the paper cover for limiting, and the annular groove 221 of the nest bottom die holder 22 abuts against the side wall of the paper cover for inwards bending the nest bottom.

When the utility model is used, the nest side fixed module 1 is preferably arranged above, and the nest side movable module 2 is preferably arranged below; the fixed nest edge die 1 can be installed on a turntable type conveying mechanism, and the fixed nest edge die 1 with the paper cover 4 is conveyed to each process of circumferential arrangement by rotating, and nest edge is carried out when the fixed nest edge die 1 is conveyed to be opposite to the movable nest edge die set 2. The fed paper cover 4 has been formed into a cylindrical shape with one end open by folding from a sheet-like paper by the previous process, as shown in fig. 5, which is a longitudinal section of the cylindrical paper cover 4. The paper cover 4 is matched with the size of the cylindrical die cavity 11, and the paper cover 4 is positioned in the cylindrical die cavity; nest end preforming mould 21 and nest die bed 22 accessible independent drive unit upward movement or synchronous motion in proper order, nest end preforming mould 21 stretch into cylindricality die cavity 11 and contradict paper lid 4 and carry out the overall positioning to paper lid 4 stable, are favorable to subsequent action, and the relative position of paper lid 4 can not appear removing because of the extrusion of the nest limit of sequentiality, effectively guarantees good stable carry out the even nest limit of peripheral round. Then, the nest base die seat 22 reaches the paper cover 4, the annular groove 221 abuts against the side wall of the paper cover 4 along with continuous advancing, and the side wall of the paper cover 4 bends the nest edge towards the inner wall along the outer wall of the annular groove 221, so that the nest edge effect shown in fig. 5 is realized. After the nest side movable module 2 finishes the work reset, the nest side fixed module 1 can be rotationally conveyed to the next station by the conveying mechanism in a turntable mode for processing. The utility model discloses good realization paper lid 4's nest limit work, through structural location make the paper lid 4 structure before the nest limit more stable, guarantee that the nest limit of circumference round is even, have better appearance, process continuation processing finished product after the confession that can standardize has improved paper lid 4 off-the-shelf quality, adaptation paper cup or paper bowl that can be good, the lid that peripheral structure evenly can be stable closes paper cup or paper bowl. The paper cover manufactured by the above scheme is preferably a circular paper cover, but is not limited to only processing the circular paper cover, and can be used for processing paper covers of non-uniform type, square type, reel type and the like when a mould with a corresponding shape is adopted for processing.

As a modified embodiment, a first elastic member 23 is arranged between the socket bottom pre-pressing die 21 and the socket bottom die holder 22, the socket bottom die holder 22 pushes the socket bottom pre-pressing die 21 to move synchronously through the first elastic member 23 during the advance, and the first elastic member 23 is compressed when the socket bottom die holder 22 continues to advance after the socket bottom pre-pressing die 21 abuts against the bottom of the paper cover.

As shown in fig. 2, 3 and 4, by the arrangement of the first elastic element 23, the synchronous movement of the socket bottom pre-pressing die 21 and the socket bottom die holder 22 through one driving component is realized; when the synchronous pushing is carried out, the nest bottom prepressing die 21 firstly reaches the cylindrical die cavity 11 to collide with the bottom of the paper cover 4, then the nest bottom die holder 22 continues to advance, the annular groove 221 collides with the side wall of the paper cover 4, the side wall of the paper cover 4 is guided along the outer wall of the annular groove 221, bends towards the inner wall of the annular groove 221 along the groove bottom of the annular groove 221, and the nest edge is finished when the nest bottom prepressing die advances in place; nest limit in-process nest end preforming mould 21 can not bring too big pressure to paper lid 4 through the spacing paper lid 4 of first elastic component 23 elasticity, avoids the excessive extrusion to paper lid 4, guarantees that the appearance of paper lid 4 is complete not to have a damage. When nest limit activity module 2 was located the below, the reposition of nest die holder 22 was realized through drive assembly, and nest bottom preforming mould 21 accessible gravity resets by oneself, perhaps resets through the limit structure between nest bottom preforming mould 21 and nest die holder 22. The arrangement of the first elastic element 23 makes the position of the paper cover 4 more gentle, and the whole is driven by a driving part, so that the cost can be well controlled and the complexity of the structure can be reduced.

As an improved embodiment, a pre-pressing mandrel 211 is disposed at the rear portion of the socket bottom pre-pressing die 21, a socket bottom mandrel 222 is disposed at the rear portion of the socket bottom die holder 22, the pre-pressing mandrel 211 is axially movably inserted into the socket bottom mandrel 222, the first elastic member 23 is sleeved on the pre-pressing mandrel 211, and two ends of the first elastic member are respectively limited by the socket bottom pre-pressing die 21 and the socket bottom die holder 22.

As shown in fig. 1, 2, 3 and 4, the pre-pressing mandrel 211 is well provided with a first elastic member 23, the first elastic member 23 is preferably a spring, and two ends of the spring are matched with the socket bottom pre-pressing die 21 and the socket bottom die holder 22; the pre-pressing mandrel 211 is sleeved in the socket bottom mandrel 222 to axially move, the axial direction of the pre-pressing mandrel 211 and the axial direction of the socket bottom mandrel 222 are stable, stable axial movement of the socket bottom pre-pressing die 21 and the socket bottom die holder 22 can be guaranteed, the occupied space of the structure formed by the double-rod sleeved die is small, the whole size is reduced, and a shaft sleeve can be arranged between the pre-pressing mandrel 211 and the socket bottom mandrel 222 to guarantee movement stability and reduce abrasion.

As an improved specific embodiment, the nest-side moving module 2 further includes a pushing seat 24, the nest bottom core shaft 222 is axially movably inserted into the pushing seat 24, a second elastic member 25 is disposed between the pushing seat 24 and the nest bottom die holder 22, the pushing seat 24 is driven by the driving part and pushes the nest bottom die holder 22 to move synchronously through the second elastic member 25; the periphery of the socket base 22 has an interference surface 223 interfering with the periphery of the socket side fixing mold 1, and when the interference surface 223 interferes with the socket side fixing mold 1, the pushing seat 24 continues to advance to compress the second elastic member 25.

As shown in fig. 1, 2 and 4, through the arrangement of the second elastic member 25, the nest base die holder 22 is also elastically pressed against the abutting surface 223 of the nest side fixed die 1, after the nest base die holder 22 reaches the abutting surface 223 to abut against, the push seat 24 continues to compress the second elastic member 25 to ensure that the die assembly is firm and stable, the die abuts against softly in place, the die does not have hard collision, and the collision and abrasion among the dies are avoided; when the nest edge movable module 2 is located below, the reset of the pushing seat 24 is realized through the driving part, and the nest base seat 22 can reset automatically through gravity or reset through a limiting structure between the nest base seat 22 and the pushing seat 24. The arrangement of the second elastic part 25 makes the in-place fit between the molds softer, and the whole is arranged and driven by a driving part, so that the cost can be well controlled, and the complexity of the structure can be reduced. The socket bottom mandrel 222 is well provided with a second elastic element 25, the second elastic element 25 is preferably a spring, and two ends of the spring are matched with the pushing seat 24 and the socket bottom die seat 22; the socket bottom mandrel 222 is sleeved in the pushing seat 24 and moves axially, the axial direction of the pushing seat 24 and the axial direction of the socket bottom mandrel 222 are stable, stable axial movement of the pushing seat 24 and the socket bottom die holder 22 can be guaranteed, the occupied space of the structure formed by sleeving the two rods is small, the whole size is reduced, and a shaft sleeve can be arranged between the pushing seat 24 and the socket bottom mandrel 222 to guarantee movement stability and reduce abrasion.

As a modified embodiment, the outer side wall of the socket edge annular groove 221 is higher than the inner side wall, and the outer side wall and the inner side wall are both obliquely arranged and are connected in an arc shape at the bottom of the annular groove 221.

As shown in fig. 1, the outer side wall is higher, the upper part of the outer side wall is used for contacting with the side wall of the paper cover 4 in advance and guiding the paper cover 4 inwards by virtue of an outward inclined structure, the groove bottom of the annular groove 221 is an arc shape, the side wall of the paper cover 4 is bent softly and is bent upwards towards the inner side wall by smooth connection, and therefore the nest edge is completed; the paper cover 4 side wall is well guided and the soft nest edge is well realized, and the problem that the paper cover 4 is deformed due to rigid extrusion contact in the existing nest edge process is avoided, so that the yield is improved.

As a modified embodiment, the nest side fixed die 1 comprises a fixed die body 12 and a pushing assembly 13, a cylindrical die cavity 11 is arranged at the lower part of the fixed die body 12, the pushing assembly 13 extends into the cylindrical die cavity 11 from the upper part of the fixed die body 12 and can move along the axial direction, and a channel 14 arranged on the pushing assembly 13 is connected with an external suction mechanism for sucking and positioning a paper cover.

As shown in fig. 1, 2 and 3, in specific implementation, the channel 14 is connected with an external air suction mechanism, such as an air pump, the air suction mechanism sucks air to suck the paper cover 4 in the cylindrical mold cavity 11 for positioning and conveying, and the material pushing assembly 13 is matched with the socket bottom prepressing mold 21 to vertically clamp the paper cover 4 for limiting; the fixed die body 12 is fixedly arranged on the rotary table, the pushing assembly 13 can be axially movably arranged, so that when the paper cover 4 needs to be discharged, the pushing assembly 13 can move the paper cover 4 out of the cylindrical die cavity 11 to move out of the cylindrical die cavity 11, and when the air suction mechanism does not suck air any more, the positioning of the paper cover 4 can be released, so that the processed paper cover 4 can be discharged; when the feeding is positioned, the reverse operation can be carried out, the material pushing assembly 13 extends out of the paper adsorption cover 4 and is positioned in the cylindrical die cavity 11 after reset. The positioning, discharging and feeding of the paper cover 4 are well realized through the whole structure, the standardized automatic processing production line can be adapted, and the automatic processing level is improved.

As a modified embodiment, the pushing assembly 13 includes a pushing plate 131 and a guiding shaft 132 connected to each other, the pushing plate 131 is cylindrical and is accommodated in the cylindrical mold cavity 11, and is adapted to the cross section of the cylindrical mold cavity 11 for abutting against the paper cover, the guiding shaft 132 is inserted into the fixed mold body 12 for axial movement, and the channel 14 is axially disposed along the guiding shaft 132 and is communicated to one end of the pushing plate 131.

As shown in fig. 2 and 3, the pushing plate 131 is located in the cylindrical cavity 11 and is preferably arranged in a cylindrical shape corresponding to the cross section of the cylindrical cavity 11 for good contact with the paper cover 4, and can cooperate with the socket bottom prepress mold 21 which is also cylindrical to clamp the paper cover 4; the guide shaft 132 axially moves in the fixed die body 12 to drive the push plate 131 to perform discharging and resetting operations; the channel 14 is arranged in the guide shaft 132 and can be communicated to the upper end for connecting the air suction mechanism, and the lower end is communicated to the right center of the push plate 131 for stably adsorbing the paper cover 4 in the middle; the structure is simple and the manufacture is convenient.

As a modified specific embodiment, the guiding shaft 132 is sleeved with a third elastic element 133, the upper end of the third elastic element 133 abuts against a step 1321 arranged on the guiding shaft 132, and the lower end abuts against the fixed die body 12, so that when the guiding shaft 132 drives the push plate 131 to move towards the opening of the cylindrical die cavity 11, the third elastic element 133 is compressed; the restoring force of the third elastic member 133 drives the push plate 131 to return to the bottom of the cylindrical mold cavity 11.

As shown in fig. 1 and 2, in a specific use, the guide shaft 132 may be driven by an external driving means, such as an air cylinder, which is not necessarily arranged in synchronization with the fixed nest-side mold 1, and which is only arranged at a station where the discharging and feeding of the paper lids 4 are required, when the fixed nest-side mold 1 requiring the discharging and feeding is reached, the driving means drives the pushing assembly 13 downward to push out, and simultaneously compresses the third elastic member 133, and the resetting of the pushing assembly 13 is realized by the third elastic member 133 without the aid of an external driving means. Thereby realizing the simplification of the structure and parts and reducing the manufacturing cost.

As a modified embodiment, the fixed mould body 12 and the bottom pre-pressing mould 21 are provided with vent holes 3, the vent holes 3 of the fixed mould body 12 penetrate through the cylindrical mould cavity 11 and the external space, and the vent holes 3 of the bottom pre-pressing mould 21 penetrate through and press the surface of the paper cover and the external space.

As shown in fig. 1 and 4, the vent holes 3 on the fixed die body 12 and the socket bottom pre-pressing die 21 are all used for discharging extruded air through the vent holes 3 when the upper die and the lower die are closed, so that the paper cover 4 is prevented from being extruded to damage the paper cover 4, and the yield is improved.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a paper lid nest limit mould which characterized in that: the paper cover nesting device comprises a nesting side fixed die (1) used for conveying and positioning paper covers and a nesting side movable die set (2) used for nesting sides of the paper covers, wherein the nesting side fixed die (1) is provided with a cylindrical die cavity (11) used for accommodating the paper covers, and the side walls of the paper covers extend out of the cylindrical die cavity (11) when the paper covers are positioned in the cylindrical die cavity (11); the nest side movable module (2) comprises a nest bottom prepressing die (21) and a nest bottom die holder (22) which are coaxially and sequentially arranged from inside to outside, and the nest bottom die holder (22) is provided with an annular groove (221) for aligning the nest bottom of the side wall of the paper cover; when the nest side fixed die (1) and the nest side movable die set (2) work relatively, the nest bottom prepressing die (21) and the nest bottom die holder (22) are matched with the nest side fixed die (1) in sequence through the driving part, the nest bottom prepressing die (21) abuts against the bottom of the paper cover to limit, and the annular groove (221) of the nest bottom die holder (22) abuts against the side wall of the paper cover to bend the nest bottom inwards.

2. The paper cover nest edge mold of claim 1, wherein: a first elastic piece (23) is arranged between the nest bottom prepressing die (21) and the nest bottom die holder (22), the nest bottom die holder (22) pushes the nest bottom prepressing die (21) to move synchronously through the first elastic piece (23) when moving, and after the nest bottom prepressing die (21) pushes the bottom of the paper cover, the nest bottom die holder (22) compresses the first elastic piece (23) when moving continuously.

3. The paper cover nest edge mold of claim 2, wherein: the back part of the nest bottom prepressing die (21) is provided with a prepressing mandrel (211), the back part of the nest bottom die holder (22) is provided with a nest bottom mandrel (222), the prepressing mandrel (211) can axially and movably penetrate through the nest bottom mandrel (222), the first elastic piece (23) is sleeved on the prepressing mandrel (211), and two ends of the first elastic piece are respectively limited by the nest bottom prepressing die (21) and the nest bottom die holder (22).

4. The paper cover nest edge mold of claim 3, wherein: the nest edge movable module (2) further comprises a pushing seat (24), the nest bottom core shaft (222) can axially movably penetrate through the pushing seat (24), a second elastic piece (25) is arranged between the pushing seat (24) and the nest bottom die holder (22), and the pushing seat (24) is driven by the driving part and pushes the nest bottom die holder (22) to synchronously move through the second elastic piece (25); the periphery of the nest base die seat (22) is provided with an abutting surface (223) abutting against the periphery of the nest side fixed die (1), and when the abutting surface (223) abuts against the nest side fixed die (1), the pushing seat (24) continues to advance to compress the second elastic piece (25).

5. A paper lid nest edge mould according to any one of claims 1-4 wherein: the nest side fixed die (1) is located above, the nest side movable die set (2) is located below, and the nest side movable die set (2) moves upwards to be matched with the nest side fixed die (1).

6. A paper lid nest edge mould according to any one of claims 1-4 wherein: the outer side wall of the socket edge annular groove (221) is higher than the inner side wall, and the outer side wall and the inner side wall are obliquely arranged and are connected in an arc shape at the bottom of the annular groove (221).

7. A paper lid nest edge mould according to any one of claims 1-4 wherein: the nest side fixed die (1) comprises a fixed die body (12) and a material pushing assembly (13), a cylindrical die cavity (11) is arranged at the lower part of the fixed die body (12), the material pushing assembly (13) extends into the cylindrical die cavity (11) from the upper part of the fixed die body (12) and can move axially, and a channel (14) is arranged on the material pushing assembly (13) and connected with an external air suction mechanism to be used for sucking and positioning the paper cover.

8. The paper cover nest edge mold of claim 7, wherein: the material pushing assembly (13) comprises a pushing plate (131) and a guide shaft (132) which are connected with each other, the pushing plate (131) is cylindrical and is contained in a cylindrical mold cavity (11), the pushing plate is matched with the cross section of the cylindrical mold cavity (11) and is used for abutting against a paper cover, the guide shaft (132) penetrates through the fixed mold body (12) to move axially, and the channel (14) is axially arranged along the guide shaft (132) and communicated to one end of the pushing plate (131).

9. The paper cover nest edge mold of claim 8, wherein: a third elastic part (133) is sleeved on the guide shaft (132), the upper end of the third elastic part (133) is abutted against a step (1321) arranged on the guide shaft (132), the lower end of the third elastic part is abutted against the fixed die body (12), and the third elastic part (133) is compressed when the guide shaft (132) drives the push plate (131) to move towards the opening of the cylindrical die cavity (11); the restoring force of the third elastic piece (133) drives the push plate (131) to restore to the bottom of the cylindrical mold cavity (11).

10. The paper cover nest edge mold of claim 7, wherein: the paper cover is characterized in that vent holes (3) are formed in the fixed die body (12) and the socket bottom prepressing die (21), the vent holes (3) of the fixed die body (12) penetrate through the cylindrical die cavity (11) and the external space, and the vent holes (3) of the socket bottom prepressing die (21) penetrate through and press the surface and the external space of the paper cover.