CN109732997B - Paper cover forming method - Google Patents
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- CN109732997B CN109732997B CN201910169714.8A CN201910169714A CN109732997B CN 109732997 B CN109732997 B CN 109732997B CN 201910169714 A CN201910169714 A CN 201910169714A CN 109732997 B CN109732997 B CN 109732997B
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Abstract
The invention discloses a paper cover forming method, which comprises the following steps: surface oiling is carried out on the paper sheet to be processed; step two: folding the paper sheet, and processing the paper sheet into a cylindrical paper cover with an opening at one side; step three: heating the paper cover for the first time to soften the film on the surface of the paper cover; step four: carrying out primary edge nesting on the paper cover, and primarily bending the lower edge of the side wall of the paper cover inwards; step five: heating the paper cover for the second time to soften the film on the surface of the paper cover; step six: secondary edge nesting is carried out on the paper cover, and the lower edge of the side wall of the paper cover is bent inwards to be in place; step seven: and compacting and shaping the inner side of the paper cover. By applying oil to the paper sheet, the method has a smoother forming effect during edge folding operation, reduces the possibility of damaging the paper sheet by a die, and is also beneficial to the good extrusion and folding of the periphery of the paper sheet into the side wall of the paper cover; the nest edge is formed through two steps, so that the quality of the nest edge is ensured, the film on the paper cover can be better bent and formed after being well softened, and the processing yield is ensured.
Description
Technical Field
The invention relates to a processing method, in particular to a paper cover forming method.
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, processing machinery to the paper lid is still less, and to the processing of paper lid, still lack comparatively efficient processing mode, if a plurality of staff through a plurality of stations carry out one step of shaping, paper lid transmission efficiency is lower during, and the error rate that manual operation brought also can influence the quality of product processing. And in the process of processing and forming the paper sheet into the cylindrical paper cover, the quality of a finished product can be effectively improved through a good process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a paper cover forming method, which can be used for processing paper sheets into paper covers in order and can ensure the yield.
The invention adopts the following technical scheme: a method of forming a paper cover comprising the steps of:
the method comprises the following steps: surface oiling is carried out on the paper sheet to be processed;
step two: folding the paper sheet, and processing the paper sheet into a cylindrical paper cover with an opening at one side;
step three: heating the paper cover for the first time to soften the film on the surface of the paper cover;
step four: carrying out primary edge nesting on the paper cover, and primarily bending the lower edge of the side wall of the paper cover inwards;
step five: heating the paper cover for the second time to soften the film on the surface of the paper cover;
step six: secondary edge nesting is carried out on the paper cover, and the lower edge of the side wall of the paper cover is bent inwards to be in place;
step seven: and compacting and shaping the inner side of the paper cover.
And step A is also arranged between the step two and the step three as an improvement, and the step A is used for carrying out pre-pressing and shaping on the paper cover in the step two.
And as a modification, a step B is also provided between the step six and the step seven, and the step B is to perform knurling and pre-compaction on the inner side of the paper cover in the step six.
The paper cover forming method is realized by adopting a paper cover forming mechanism, wherein the paper cover forming mechanism comprises a conveying turntable which is arranged in a rotating mode, a paper cover conveying mould for positioning the paper cover to convey, a paper sheet conveying mechanism for conveying paper sheets, a folding mould for folding the paper sheets to form a cylindrical paper cover, a prepressing mould for prepressing and shaping the cylindrical paper cover formed after the folding of the folding mould, two groups of heating mechanisms for heating and softening the paper cover, two groups of nest edge moulds for inwards bending the lower portion of the side wall of the paper cover, a knurling mould for outwards knurling and compacting the side wall of the paper cover which is bent inwards, a shaping mould for compacting and shaping the paper cover, and an output mechanism for outwards conveying the paper cover, the paper cover conveying moulds are multiple, the paper cover conveying moulds are arranged in the circumferential direction of the conveying turntable, the folding mould, the paper cover conveying mould and the paper cover are arranged in a rotating mode, Prepressing die, a set of heating mechanism, a set of nest limit mould, another group's heating mechanism, another group's nest limit mould, annular knurl mould, design mould and output mechanism arrange in proper order below the circumferencial direction of carrying the carousel and corresponding with the stop station of the paper lid transport module of top, scraps of paper transport mechanism sets up in the side of hem mould, scraps of paper transport mechanism department is provided with the mechanism that oils to scraps of paper.
As an improvement, the paper cover conveying die comprises a fixed die body and a material pushing assembly, wherein a cylindrical die cavity used for containing the paper cover is arranged at the lower part of the fixed die body, the material 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 material 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, the nest side die 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 paper cover conveying die and the nest side die work relatively, the nest bottom prepressing die and the nest bottom die holder are matched with the paper cover conveying 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.
The flanging die comprises a flanging fixed die and a movable die set which are coaxially arranged, wherein the flanging fixed die is provided with a cylindrical die outlet hole which is axially communicated, and the periphery of one end, facing the movable die set, of the cylindrical die outlet hole is provided with a guide wall which is obliquely arranged; the movable module comprises a prepressing outer ring, a flanging prepressing die and a folding bottom die which are coaxially and sequentially arranged from outside to inside, the prepressing outer ring, the flanging prepressing die and the folding bottom die are sequentially matched with the flanging fixed die through a driving part, the prepressing outer ring is in contact fit with the end surface of the flanging fixed die and is used for prepressing and positioning to-be-flanged paper sheets, the flanging prepressing die is matched with the guide wall and is used for pre-folding the to-be-flanged paper sheets to form inclination when in contact fit, and the folding bottom die is matched with the cylindrical hole for mold outlet and is used for forming the to-be-flanged paper sheets into a cylindrical paper cover in the cylindrical hole; and when the bottom folding die pushes the paper cover upwards out of the cylindrical die outlet hole, the paper cover is pushed to the paper cover conveying die above the bottom folding die for positioning.
The prepressing outer ring and the flanging prepressing die are synchronously pushed through a prepressing ejector rod, an elastic component is arranged between the prepressing outer ring and the flanging prepressing die and the prepressing ejector rod, and the prepressing outer ring and the flanging prepressing die respectively abut against the end surface and the guide wall of the flanging fixed die by virtue of the elasticity of the elastic component; when the prepressing outer ring is abutted against the end face of the flanging fixed die, the prepressing ejector rod continues to advance to abut the flanging prepressing die against the guide wall; the front end of the prepressing ejector rod is provided with a prepressing arrangement frame, the prepressing arrangement frame comprises a top disc, an inner pressing ring and an outer pressing ring, the top disc is arranged at the end part of the prepressing ejector rod, and the inner pressing ring and the outer pressing ring are respectively arranged at the inner side and the outer side of the top disc; the outer pressing ring carries out upper limit on the prepressing outer ring through a step, and an elastic component is arranged between the prepressing outer ring and the top disc; the inner compression ring carries out upper limit on the flanging prepressing die through the step, and an elastic component is arranged between the flanging prepressing die and the top disc.
The invention has the beneficial effects that: the method is favorable for smoother forming effect when the paper sheet is subjected to edge folding operation by oiling the paper sheet, reduces the possibility of damaging the paper sheet when the paper sheet is extruded and formed by a die, and is also favorable for the periphery of the paper sheet to be well extruded and folded into the side wall of the paper cover; the operation of the nest edge is realized by two steps, namely, the primary heating and nest edge in the third step and the primary heating and nest edge in the fourth step, the lower edge of the side wall of the paper cover is bent inwards to a certain degree, which can be half of the position of the final nest edge, and then the nest edge of the paper cover is bent in place through the secondary heating and nest edge in the fifth step and the sixth step, so that the operation aims at ensuring the quality of the nest edge, the film on the paper cover can be bent and formed better after being softened well, the possible side wall deformation of the primary nest edge is avoided, and the finished product rate of processing is ensured; the paper cover processed and formed in the way has better quality, beautiful appearance and no defect, can be recognized and loved by sellers and users, is not easy to deform due to extrusion in the processing process, improves the production efficiency and the yield, and reduces the cost.
Drawings
Fig. 1 is a schematic perspective view of a paper cover forming mechanism used in the present invention, viewed from the front.
Fig. 2 is a schematic perspective view of a paper cover forming mechanism used in the present invention, viewed from the back.
Fig. 3 is a schematic cross-sectional structural view of a longitudinal section of a nest edge die and a paper cover conveying die of a paper cover forming mechanism used in the present invention.
Fig. 4 is an enlarged view of the structure at M in fig. 3.
Fig. 5 is a schematic cross-sectional view of a longitudinal section of a hemming die of a paper cover forming mechanism used in the present invention.
Fig. 6 is an enlarged view of the structure at N in fig. 5.
Fig. 7 is a schematic perspective view of a heating mechanism of the paper cover forming mechanism used in the present invention.
Fig. 8 is a schematic perspective view of a setting mold or a pre-pressing mold of a paper cover forming mechanism used in the present invention.
Fig. 9 is a schematic cross-sectional view of a longitudinal section of a knurling mold of a paper cover molding mechanism used in the present invention.
FIG. 10 is a schematic cross-sectional view of a finished, formed longitudinal cross-section of a paper cover made in accordance with the present invention after folding, nesting, and finishing.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
Fig. 1 to 10 show a specific embodiment of a paper cover forming mechanism used in the paper cover forming method of the present invention.
A method of forming a paper cover comprising the steps of:
the method comprises the following steps: surface oiling is carried out on the paper sheet to be processed;
step two: folding the paper sheet, and processing the paper sheet into a cylindrical paper cover with an opening at one side;
step A: pre-pressing and shaping the paper cover in the second step;
step three: heating the paper cover for the first time to soften the film on the surface of the paper cover;
step four: carrying out primary edge nesting on the paper cover, and primarily bending the lower edge of the side wall of the paper cover inwards;
step five: heating the paper cover for the second time to soften the film on the surface of the paper cover;
step six: secondary edge nesting is carried out on the paper cover, and the lower edge of the side wall of the paper cover is bent inwards to be in place;
and B: knurling and pre-compacting the inner side of the paper cover in the sixth step;
step seven: and compacting and shaping the inner side of the paper cover.
The paper cover forming mechanism comprises a conveying turntable 1, a paper cover conveying mold 2, a paper conveying mechanism 3, a flanging mold 4, a prepressing mold 10, two groups of heating mechanisms 5, two groups of pit edge molds 6, a knurling mold 7, a shaping mold 8 and an output mechanism 9, wherein the conveying turntable 1 is arranged in a rotating mode, the paper cover conveying mold 2 is used for positioning the paper cover to convey, the paper conveying mechanism 3 is used for conveying paper, the flanging mold 4 is used for flanging the paper to form a cylindrical paper cover, the prepressing mold 10 is used for prepressing and shaping the cylindrical paper cover formed after the flanging mold 4 is flanged, the two groups of heating mechanisms 5 are used for heating and softening the paper cover, the two groups of pit edge molds 6 are used for inwards bending the lower portion of the side wall of the paper cover, the knurling mold 7 is used for outwards knurling and compacting the side wall of the paper cover which is inwards bent, the shaping mold 8 is used for compacting the paper cover, the output mechanism 9, A set of heating mechanism 5, a set of nest limit mould 6, another group of heating mechanism 5, another group of nest limit mould 6, annular knurl mould 7, design mould 8 and output mechanism 9 arrange in proper order below the circumferencial direction of carrying carousel 1 and corresponding with the stop station of the paper lid conveying mould 2 of top, scraps of paper conveying mechanism 3 sets up in the side of hem mould 4, scraps of paper conveying mechanism 3 department is provided with the mechanism 11 that oils to the scraps of paper.
When the invention is used, the working procedures are as follows:
[1] the paper sheets are conveyed by the paper sheet conveying mechanism 3, and the oiling mechanism 11 positioned at the paper sheet conveying mechanism 3 firstly oils the paper sheets;
[2] the paper sheets are conveyed from the side edge to the edge folding die 4 by the paper sheet conveying mechanism 3;
[3] the paper sheets are pressed into a cylindrical paper cover 0 by the edge folding die 4 and are output to the opposite paper cover conveying die 2 from the upper part for positioning;
[4] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the pre-pressing die 10, and the paper cover 0 pressed into a cylindrical shape by the edge folding die 4 is compacted and shaped at the position of the pre-pressing die 10;
[5] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the first group of heating mechanisms 5, and the first group of heating mechanisms 5 soften the film on the paper cover 0, so that the paper cover can be better subjected to primary edge nesting;
[6] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the first group of nest edge molds 6, and the first group of nest edge molds 6 perform inward preliminary bending nest edges on the lower portion of the side wall of the paper cover 0;
[7] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the second group of heating mechanisms 5, and the second group of heating mechanisms 5 soften the film on the paper cover 0, so that secondary edge nesting can be better performed;
[8] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the second group of nest edge molds 6, and the second group of nest edge molds 6 continuously bend the paper cover 0 inwards at the lower part of the side wall to form nest edges in place;
[9] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the knurling mold 7, and the knurling mold 7 performs outward knurling and compaction on the side wall of the paper cover 0 which is bent inwards;
[10] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the shaping mold 8, and the shaping mold 8 compacts and shapes the paper cover 0;
[11] the conveying turntable 1 rotates, the paper cover 0 is conveyed to the output mechanism 9, the conveying mold 2 of the paper cover 0 releases the positioning of the paper cover 0, and the paper cover 0 falls to the output mechanism 9 for output.
The whole process completes the processing and forming of the paper cover 0, as shown in fig. 10, the paper sheet is pressed into a cylindrical paper cover 0 shown in a first state by a flanging die 4, then is pressed into the paper cover 0 with an inward bending concave edge shown in a second state by a first group of concave edge dies 6, then is further pressed in place by a second group of concave edge dies 6 to complete a concave edge (not shown in the figure), and finally is subjected to knurling and compacting by a knurling die and further compacting and shaping by a shaping die 8 to form a finished paper cover 0 shown in a third state; the paper cover conveying moulds 2 on the conveying rotary table 1 respectively convey the paper covers 0, and each position can finish respective work without interference, so that the working efficiency is greatly improved, the product quality is ensured by automatic production, and the economic benefit is improved.
The method is favorable for smoother forming effect when the paper sheet is subjected to edge folding operation by oiling the paper sheet, reduces the possibility of damaging the paper sheet when the paper sheet is extruded and formed by a die, and is also favorable for the periphery of the paper sheet to be well extruded and folded into the side wall of the paper cover; the operation of the nest edge is realized by two steps, the quality of the nest edge is ensured, the film on the paper cover can be better bent and formed after being well softened, the possible uneven or deformation of the side wall of the disposable nest edge is avoided, and the finished product rate of processing is ensured; the paper cover processed and formed in the way has better quality, beautiful appearance and no defect, can be recognized and loved by sellers and users, is not easy to deform due to extrusion in the processing process, improves the production efficiency and the yield, and reduces the cost.
The pre-pressing die 10 and the pre-pressing step a are arranged so that the cylindrical shape of the paper cover 0 is accurate and does not deform, and the subsequent nesting edge die 6 is favorable for further nesting edges of the paper cover 0.
As shown in fig. 1, the paper sheet conveying mechanism 3 may preferably be configured to convey circular paper sheets, and includes at least a stacking space 31 and a feeding rail 32, the circular paper sheets are stacked in a stack in the stacking space 31, and the bottommost circular paper sheet may be conveyed by the driving mechanism toward the hemming die 4 along the feeding rail 32; the oiling mechanism 11 can be preferably arranged above the feeding track 32, when the circular scraps of paper pass through, the oiling mechanism 11 descends to carry out oiling on the circular scraps of paper and then reset, and the circular scraps of paper are conveyed to the flanging die 4. The oiling mechanism 11 specifically can coat silicone oil to circular scraps of paper, can improve the smoothness on circular scraps of paper surface, and the circular scraps of paper of being convenient for is smooth when cylindrical when being extruded in hem mould 4, reduces the frictional force between circular scraps of paper and mould, avoids scraping flower to circular scraps of paper surface, reduces the product disability rate.
As a modified embodiment, the paper cover conveying mould 2 comprises a fixed mould body 212 and a pushing assembly 213, wherein a cylindrical mould cavity 211 for containing the paper cover is arranged at the lower part of the fixed mould body 212, the pushing assembly 213 extends into the cylindrical mould cavity 211 from the upper part of the fixed mould body 212 and can move along the axial direction, and a channel 214 arranged on the pushing assembly 213 is connected with an external suction mechanism for sucking and positioning the paper cover.
As shown in fig. 3 and 4, in practical implementation, the channel 214 is connected to an external suction mechanism, such as an air pump, the suction mechanism sucks air to suck the paper cover 0 into the cylindrical mold cavity 211 for positioning and conveying, and the pushing assembly 213 serves as the bottom of the cylindrical mold cavity 211 and cooperates with the sidewall of the cylindrical mold cavity 211 to limit the paper cover 0; the fixed mould body 212 is fixedly arranged on the conveying turntable 1, the material pushing assembly 213 can be axially movably arranged, when the paper cover 0 needs to be discharged, the material pushing assembly 213 can move the paper cover 0 out of the cylindrical mould cavity 211, and when the air suction mechanism does not suck air any more, the positioning of the paper cover 0 can be released, so that the discharge work of the processed paper cover 0 is realized; when the feeding is positioned, the reverse operation can be performed, the material pushing assembly 213 extends out to adsorb the paper cover 0, and the paper cover is positioned in the cylindrical mold cavity 211 after reset. The positioning, discharging and feeding of the paper cover 0 are well realized through the whole structure, the standardized automatic processing production line can be adapted, and the automatic processing level is improved.
As an improved specific embodiment, the pushing assembly 213 includes a pushing plate 2131 and a guiding shaft 2132, which are connected with each other, the pushing plate 2131 is cylindrical and is accommodated in the cylindrical mold cavity 211, and is adapted to the cross section of the cylindrical mold cavity 211 for abutting against the paper cover, the guiding shaft 2132 is inserted into the fixed mold body 212 for axial movement, and the channel 214 is axially disposed along the guiding shaft 2132 and is communicated to one end of the pushing plate 2131.
As shown in fig. 3 and 4, the push plate 2131 is located in the cylindrical cavity 211 and is preferably arranged in a cylindrical shape corresponding to the cross section of the cylindrical cavity 211 for good contact with the paper cover 0; the guide shaft 2132 axially moves in the fixed die body 212 and is used for driving the push plate 2131 to discharge and reset; the channel 214 is arranged in the guide shaft 2132, can be communicated to the upper end to connect the air suction mechanism, and the lower end is communicated to the right center of the push plate 2131 to stably adsorb the paper cover 0 in the middle; the structure is simple and the manufacture is convenient.
As an improved specific embodiment, the guide shaft 2132 is sleeved with a third elastic member 2133, the upper end of the third elastic member 2133 abuts against a step arranged on the guide shaft 2132, the lower end of the third elastic member abuts against the fixed die body 212, and when the guide shaft 2132 drives the push plate 2131 to move towards the opening of the cylindrical die cavity 211, the third elastic member 2133 is compressed; the restoring force of the third elastic element 2133 drives the push plate 2131 to restore to the bottom of the cylindrical mold cavity 211.
As shown in fig. 1, 2, 3, and 4, in a specific use, the guide shaft 2132 may be driven by an external driving component, such as an air cylinder, which is not necessarily arranged in synchronization with the paper cap conveying mold 2, but only arranged at a station where the paper cap 0 needs to be pushed out, when the paper cap conveying mold 2 needing to be pushed out arrives, the driving component drives the pushing assembly 213 downward to push out, and simultaneously compresses the third elastic component 2133, and the resetting of the pushing assembly 213 is realized by the third elastic component 2133 without an external driving component. Thereby realizing the simplification of the structure and parts and reducing the manufacturing cost.
As a modified embodiment, the socket edge mold 6 comprises a socket bottom pre-pressing mold 621 and a socket bottom mold base 622 which are coaxially arranged from inside to outside, and the socket bottom mold base 622 is provided with an annular groove 6221 for aligning the socket bottom of the side wall of the paper cover; when the paper cover conveying mold 2 and the nest side mold 6 work relatively, the nest bottom prepressing die 621 and the nest bottom mold seat 622 are sequentially matched with the paper cover conveying mold 2 through the driving part, the nest bottom prepressing die 621 abuts against the bottom of the paper cover to limit, and the annular groove 6221 of the nest bottom mold seat 622 abuts against the side wall of the paper cover to inwards bend the nest bottom.
As shown in fig. 3 and 4, the paper cover 0 is matched with the size of the cylindrical cavity 211, and the paper cover 0 is positioned in the cylindrical cavity; nest end preforming mould 621 and nest die holder 622 accessible independent drive component upward movement or synchronous motion in proper order, nest end preforming mould 621 stretches into cylindricality die cavity 211 and contradicts paper lid 0 and carry out the overall positioning to paper lid 0 is stable, is favorable to subsequent action, and the relative position of paper lid 0 can not appear removing because of the extrusion of the nest limit of follow-up, effectively guarantees good stable carry on the even nest limit of peripheral round. Then the nest base die 622 reaches the paper cover 0, the annular groove 6221 butts against the side wall of the paper cover 0 along with continuous advancing, and the side wall of the paper cover 0 bends the nest edge towards the inner wall along the outer wall of the annular groove 6221, so that the nest edge effect shown in fig. 10 is realized. After the nest edge die 6 finishes the work and resets, the paper cover 0 is conveyed to the next station on the paper cover conveying die 2 by the conveying turntable 1 in a rotating mode. The nest edge work of the paper cover 0 is well realized by the preferable scheme, the structure of the paper cover 0 in front of the nest edge is more stable by structural positioning, the circumferential circle of nest edges is ensured to be uniform, the paper cover has better appearance, the standardized procedure after supply can be continuously processed into a finished product, the quality of the finished product processed by the paper cover 0 is improved, the paper cover can be well adapted to a paper cup or a paper bowl, and the peripheral structure is uniform and can be stably covered on the paper cup or the paper bowl.
As a modified embodiment, a first elastic member 623 is arranged between the socket bottom prepressing die 621 and the socket bottom die holder 622, the socket bottom die holder 622 pushes the socket bottom prepressing die 621 to move synchronously through the first elastic member 623 when moving, and after the socket bottom prepressing die 621 abuts against the bottom of the paper cover, the socket bottom die holder 622 continues to move to compress the first elastic member 623.
As shown in fig. 3 and 4, by the arrangement of the first elastic member 623, the socket bottom pre-pressing die 621 and the socket bottom die holder 622 can perform synchronous movement by a driving component; when the paper cover is synchronously pushed, the nest bottom prepressing die 621 firstly reaches the cylindrical die cavity 211 to abut against the bottom of the paper cover 0, then the nest bottom die holder 622 continues to advance, the annular groove 6221 abuts against the side wall of the paper cover 0, the side wall of the paper cover 0 is guided along the outer wall of the annular groove 6221, bends along the bottom of the annular groove 6221 to the inner wall of the annular groove 6221, and the nest edge is finished when the paper cover advances to the right position; nest limit in-process nest end preforming mould 621 can not bring too big pressure to paper lid 0 through first elastic component 623 elastic spacing paper lid 0, avoids the excessive extrusion to paper lid 0, guarantees that the appearance of paper lid 0 is complete not to have a damage. When the nest edge die 6 is located below, the resetting of the nest base die holder 622 is realized through the driving part, and the nest base prepressing die 621 can reset by itself through gravity or reset through a limiting structure between the nest base prepressing die 621 and the nest base die holder 622. The arrangement of the first elastic member 623 makes the position limitation of the paper cover 0 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.
As a modified embodiment, a pre-pressing mandrel 6211 is disposed at the rear portion of the socket bottom pre-pressing die 621, a socket bottom mandrel 6222 is disposed at the rear portion of the socket bottom die holder 622, the pre-pressing mandrel 6211 is axially movably disposed in the socket bottom mandrel 6222, and the first elastic member 623 is sleeved on the pre-pressing mandrel 6211 and has two ends respectively limited by the socket bottom pre-pressing die 621 and the socket bottom die holder 622.
As shown in fig. 3 and 4, the pre-pressing mandrel 6211 is well provided with a first elastic member 623, and the first elastic member 623 is preferably a spring, and two ends of the spring are engaged with the socket bottom pre-pressing die 621 and the socket bottom die holder 622; the pre-compaction dabber 6211 cover is established and is established axial activity among the end of nest dabber 6222, and both axial direction is stable, can guarantee the stable axial activity of end of nest preforming mould 621 and nest die holder 622, and the space that the structure that the double-rod cover was established occupied is little, more is favorable to reducing whole volume, can set up the axle sleeve between pre-compaction dabber 6211 and the end of nest dabber 6222 and guarantee the stability of activity and reduce wear.
As a modified embodiment, the socket edge mold 6 further includes a pushing seat 624, the socket bottom mandrel 6222 is axially movably inserted into the pushing seat 624, a second elastic member 625 is disposed between the pushing seat 624 and the socket bottom mold seat 622, the pushing seat 624 is driven by the driving component and pushes the socket bottom mold seat 622 to synchronously move through the second elastic member 625; the periphery of the socket base die seat 622 is provided with an abutting surface 6223 abutting against the periphery of the paper cover delivery die 2, and when the abutting surface 6223 abuts against the paper cover delivery die 2, the pushing seat 624 continues to advance to compress the second elastic element 625.
As shown in fig. 3 and 4, by the arrangement of the second elastic member 625, the nest base die holder 622 is also elastically pressed against the contact surface 6223 of the paper cover conveying die 2, and after the nest base die holder 622 reaches the contact surface 6223 and contacts the contact surface, the second elastic member 625 is continuously compressed by the pushing seat 624, so that die assembly is firm and stable, the die is in place and is soft in contact, the die per se has no hard collision, and the collision and abrasion among the dies are avoided; the reset of the pushing seat 624 is realized by a driving part, and the nest base die seat 622 can reset by gravity, or reset by a limiting structure between the nest base die seat 622 and the pushing seat 624. The second elastic member 625 makes the in-place fit between the molds softer, and the whole is driven by a driving member, so that the cost can be well controlled and the complexity of the structure can be reduced. The socket bottom mandrel 6222 is well provided with a second elastic member 625, and the second elastic member 625 is preferably a spring, and both ends of the spring are matched with the pushing seat 624 and the socket bottom die holder 622; the nest bottom mandrel 6222 is sleeved in the pushing seat 624 for axial movement, the axial direction of the pushing seat 624 and the nest bottom mandrel 6222 is stable, the stable axial movement of the pushing seat 624 and the nest bottom die holder 622 can be guaranteed, the space occupied by the structure sleeved by the double rods is small, the whole size is reduced, and a shaft sleeve can be arranged between the pushing seat 624 and the nest bottom mandrel 6222 to guarantee the movement stability and reduce the abrasion.
As a modified embodiment, the outer side wall of the socket edge annular groove 6221 is higher than the inner side wall, and both 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 6221.
As shown in fig. 3 and 4, 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 0 in advance and guiding the paper cover 0 inwards by virtue of an outward inclined structure of the outer side wall, the groove bottom of the annular groove 6221 is an arc-shaped groove for enabling the side wall of the paper cover 0 to bend softly and bend upwards towards the inner side wall through smooth connection, so that the nest edge is completed; the side wall of the paper cover 0 is well guided and the soft nest edge is well realized, and the problem of deformation of the paper cover 0 caused by rigid extrusion contact in the existing nest edge is avoided, so that the yield is improved.
As a modified embodiment, the hemming die 4 comprises a hemming fixed die 41 and a movable die set 42 which are coaxially arranged, the hemming fixed die 41 is provided with a cylindrical hemming outlet 411 which axially penetrates through, and the cylindrical hemming outlet 411 is provided with a guide wall 412 which is obliquely arranged towards the periphery of one end of the movable die set 42; the movable module 42 comprises a pre-pressing outer ring 423, a folding pre-pressing die 422 and a folding bottom die 421 which are coaxially and sequentially arranged from outside to inside, the pre-pressing outer ring 423, the folding pre-pressing die 422 and the folding bottom die 421 are sequentially matched with the folding fixed die 41 through a driving part, the pre-pressing outer ring 423 is in contact fit with the end face of the folding fixed die 41 and is used for pre-pressing and positioning to-be-folded paper sheets, the folding pre-pressing die 422 is matched with the guide wall 412 and is used for pre-folding the inclination of the to-be-folded paper sheets when in contact fit, and the folding bottom die 421 is matched with the cylindrical die outlet hole 411 and is used for forming the to-be-folded paper sheets into a cylindrical paper cover in the; when the folding bottom die 421 pushes the paper cover upwards out of the cylindrical die outlet 411, the paper cover is pushed to the paper cover conveying die 2 above for positioning.
As shown in fig. 5 and 6, preferably, the fixed folding edge die set 41 can be arranged at the upper part, the movable die set 42 can be arranged at the lower part, the paper sheets to be folded are conveyed between the fixed folding edge die set 41 and the movable die set 42 from the paper sheet conveying mechanism 3 at the side edge, and if the paper sheets are round paper sheets, the limiting mechanism at the outer side of the movable die set 42 can limit the paper sheets to align up and down; in the case of a strip of paper, a circle may be cut by a cutting mechanism outside the movable die set 42. Prepressing outer ring 423, folding edge prepressing die 422 and folding bottom die 421 can move upwards or move synchronously in sequence through independent driving parts, the paper sheets are peripherally positioned after the prepressing outer ring 423 is abutted against the end face of the folding edge fixing die 41, subsequent action is facilitated, deviation of the paper sheets can not occur, the prepressing outer ring 423 and the end face of the folding edge fixing die 41 can adopt a mode of conflict or elastic conflict with small pressure, and the subsequent paper sheets can be conveniently formed in an inward sliding mode when the paper sheets are positioned. Then, the folding pre-pressing die 422 reaches the guiding wall 412, the inclined surfaces of the folding pre-pressing die 422 and the guiding wall 412 are abutted so as to bend the periphery of the paper sheet into an inclination, and the folding pre-pressing die 422 and the guiding wall 412 can also adopt an abutting or elastic abutting mode with low pressure, so that the subsequent paper sheet can be conveniently formed by inwards sliding when the paper sheet is bent. Finally, the paper sheet is contacted by the bottom folding die 421, the bottom folding die 421 is in a column shape, the paper sheet is pressed into the column-shaped die outlet 411 through continuous advancing, and the periphery of the paper sheet turned over becomes a column shape; because of outside scraps of paper all will be earlier through the slope guide of hem preforming mould 422 and guide wall 412 and roll over and move, carried out preliminary extrusion folding in advance between the scraps of paper, along with scraps of paper reach cylindricality go out between nib 411 and the book end mould 421 the shaping for the lateral wall of cylindricality, scraps of paper can be comparatively even folding, can not appear the peripheral structure extrusion folding inhomogeneous condition that turns over a formation fast. The folding bottom die 421 is continuously pushed in and pushes the paper cap formed into a cylindrical shape out of the cylindrical mold outlet 411, and the paper cap can be pushed into the paper cap conveying die 2 above for positioning. The folding work of the paper cover 0 is well realized by the preferred scheme, the side wall of the paper cover 0 is stably and uniformly formed by the structural guide, the folding is uniform in the whole structure, the appearance is better, the standardized procedure after supply can be continuously processed into a finished product, the quality of the finished product processed by the paper cover 0 is improved, the paper cover can be well adapted to a paper cup or a paper bowl, and the paper cup or the paper bowl can be stably covered by the uniform peripheral structure.
As an improved specific embodiment, the pre-pressing outer ring 423 and the hemming pre-pressing die 422 are synchronously pushed by a pre-pressing ejector rod 424, an elastic component 425 is arranged between the pre-pressing outer ring 423 and the hemming pre-pressing die 422 and the pre-pressing ejector rod 424, and the pre-pressing outer ring 423 and the hemming pre-pressing die 422 respectively abut against the end surface of the hemming fixed die 41 and the guide wall 412 by the elasticity of the elastic component 425; when the prepressing outer ring 423 is abutted against the end face of the hemming fixed die 41, the prepressing ejector rod 424 continues to advance to abut the hemming prepressing die 422 against the guide wall 412; the front end of the pre-pressing ejector rod 424 is provided with a pre-pressing arrangement frame 43, the pre-pressing arrangement frame 43 comprises a top disc 431, an inner pressing ring 432 and an outer pressing ring 433, the top disc 431 is arranged at the end part of the pre-pressing ejector rod 424, and the inner pressing ring 432 and the outer pressing ring 433 are respectively arranged on the inner side and the outer side of the top disc 431; the outer pressure ring 433 limits the prepressing outer ring 423 upwards through a step 434, and an elastic component 425 is arranged between the prepressing outer ring 423 and the top disc 431; the inner pressing ring 432 limits the hemming pre-pressing die 422 upwards through a step 434, and an elastic member 425 is arranged between the hemming pre-pressing die 422 and the top disc 431.
As shown in fig. 5 and 6, the pre-pressing outer ring 423 and the hemming pre-pressing die 422 can be synchronously pushed by one component, namely the pre-pressing ejector rod 424, and the position difference of pushing out of the pre-pressing outer ring 423 and the hemming pre-pressing die 422 is realized by the elastic component 425; when the synchronous pushing is performed, the prepressing outer ring 423 firstly reaches the end face of the hemming fixed die 41 and collides, at this time, the prepressing ejector rod 424 continues to perform, and the hemming prepressing die 422 can collide to the guide wall 412; the elastic part 425 at the pre-pressing outer ring 423 can be compressed to realize elastic interference, and the hemming pre-pressing die 422 and the guide wall 412 also realize elastic interference. Under above structure, the location of realization outside circumference that can be good and bending of middle part circumference to bottom die 421 is convenient for to roll over when propelling the scraps of paper shaping to elastic conflict between them, and peripheral resistance is less, more is favorable to guaranteeing the shaping of scraps of paper, and the periphery of contradicting is difficult to hinder the scraps of paper because of the conflict power is too big, guarantees the yield of paper lid 0. Meanwhile, the pre-pressing ejector rod 424 can be set and driven by one driving part, so that the cost can be well controlled, and the complexity of the structure can be reduced.
As further refinement of the front end structure of the prepressing ejector rod 424, the arranged prepressing arrangement frame 43 is used for specifically positioning and arranging the prepressing outer ring 423 and the flanging prepressing die 422; the inner pressing ring 432 and the outer pressing ring 433 are both annular, the inner pressing ring 432 is provided with a step 434 formed outside the rear part on the inner side of the top plate 431 to limit the flanging pre-pressing die 422, the outer pressing ring 433 is provided with a step 434 formed inside the rear part on the outer side of the top plate 431 to limit the pre-pressing outer ring 423, the pre-pressing outer ring 423 and the flanging pre-pressing die 422 extend out of a space between the inner pressing ring 432 and the outer pressing ring 433, and the pre-pressing outer ring 423 and the flanging pre-; elastic parts 425 are arranged at the lower parts of the prepressing outer ring 423 and the flanging prepressing die 422 and abut against the top disc 431, and multiple groups of the elastic parts 425 can be uniformly arranged in the circumferential direction to stably bear the prepressing outer ring 423 and the flanging prepressing die 422.
As a modified embodiment, the end inner edge of the outer ring 433 and the end outer edge of the hemming fixed die 41 cooperate to form a cutting blade 44 for cutting a paper sheet to be hemmed.
As shown in fig. 6, the outer ring 433 can be specifically configured to be a structure for cooperating with the band-shaped paper sheets to work, that is, the outer ring 433 and the folding fixed mold 41 form an up-and-down cutting structure, and the continuous upward movement of the outer ring 433 is implemented to cut the band-shaped paper sheets into the circular paper sheets in the middle by the cutting edge 44 cooperating with the outer ring 433 and the folding fixed mold 41, so as to be convenient for adapting to the machine type of band-shaped paper sheet transportation.
As a modified embodiment, the inner edge of the outer ring 433 is provided with a plurality of paper feeding limiting baffle plates 45 covering 180 degrees, and 180-degree space is reserved for side paper feeding space.
As shown in fig. 6, the paper feeding limiting blocking sheet 45 arranged on the periphery of the outer ring 433 is a structure for matching with the circular paper to work, and is adapted to the model of circular paper conveying, and the circular paper is pushed into the space between the folding fixed mold 41 and the movable mold 42 from the side edge by the paper conveying mechanism 3; after reaching a plurality of paper feeding limiting blocking pieces 45 which surround a semicircle, the round paper sheets are blocked and stopped at the aligned position; preferably, four paper feeding limiting blocking pieces 45 are arranged, two groups are symmetrically arranged at the left and right positions, two groups are symmetrically arranged at the rear, and good limiting of the circular paper sheets is realized.
As a modified embodiment, the periphery of the top plate 431 is arranged on a plurality of guide rods 46 in a penetrating way, the guide rods 46 are arranged in parallel with the pre-pressing ejector rod 424, and the guide rods 46 are provided with buffer springs 461 for buffering the top plate 431.
As shown in fig. 5 and 6, the guide rods 46 may preferably be disposed at four corners, so as to achieve stable arrangement of the top disk 431, and allow the top disk 431 to stably move along the axial direction of the pre-pressing ejector 424; the top plate 431 is abutted between the fixed folding edge mould 41 and the movable mould 42 when pushed out, and a buffer spring 461 can be further arranged when the top plate 431 is reset, so that the top plate 431 is well buffered when the top plate is reset, the hard impact on the descending of the structure in the pre-pressing arrangement frame 43 is reduced, and the abrasion among parts is reduced.
As an improved specific embodiment, the bottom folding die 421 includes a folding top 4211 and a folding top rod 4212, the folding top 4211 is cylindrical and disposed at an end of the folding top rod 4212, the folding top rod 4212 is axially movably inserted into the pre-pressing top rod 424, and the pre-pressing top rod 424 and the folding top rod 4212 are moved by independent driving components respectively.
As shown in fig. 5 and 6, the hemming head 4211 is specifically arranged in a cylindrical shape and is arranged in the space inside the hemming pre-pressing die 422 in a matching manner, the hemming post rod 4212 connected to the rear end passes through the pre-pressing post rod 424 and can be connected with an independent driving component outwards to move, and a shaft sleeve can be arranged between the pre-pressing post rod 424 and the hemming post rod 4212 to ensure the activity stability and reduce the abrasion; and the space occupied by the structure sleeved by the double rods is small, so that the whole volume is reduced.
As a modified embodiment, the hole wall of the cylindrical die hole 411 and the guide wall 412 are transited by an arc.
As shown in fig. 5 and 6, the hole wall of the cylindrical die hole 411 and the guide wall 412 in the middle arc transition are more favorable for guiding and folding the paper sheets, so that the whole body is smooth, the deformation is uniform, the paper sheets are not easy to damage, and the yield is ensured.
As a modified embodiment, the hemming stamper 422 has a planar wall 4221 inside the end portion and an inclined wall 4222 outside the end portion, the inclined wall 4222 being fitted with the guide wall 412.
As shown in fig. 5 and 6, when engaged, the inclined wall 4222 contacts the guide wall 412 to restrain the paper sheet; the plane wall 4221 has no sharp included angle, so that the surface of the paper sheet is not damaged, a gentle area is formed between the bottom folding die 421 and the inclined wall 4222, the paper sheet is well transited, no crease is left on the paper sheet due to excessive extrusion, and the good appearance of the paper cover is ensured.
As a modified embodiment, as shown in fig. 7, the heating mechanism 5 includes a blowing mechanism 51 and a blowing cover 52, the blowing cover 52 forms a cavity 53, the blowing mechanism 51 is connected to the cavity 53 of the blowing cover 52 from the lower part, the upper part of the cavity 53 is opened and corresponds to the paper cover conveying mold 2, when the paper cover conveying mold 2 is located at the heating mechanism 5, the paper cover 0 covers the upper opening of the cavity 53, the blowing mechanism 51 is operated to blow hot air to the cavity 53, so as to heat and soften the paper cover 0 to soften the film on the surface of the paper cover 0, and the film is preferably a PE film; and an exhaust channel 54 may be preferably further provided at the side of the cavity 53 to guide the air flow to avoid the wind from causing a large pressure on the paper cover 0.
As a modified embodiment, as shown in fig. 8, both the sizing die 8 and the pre-pressing die 10 can be realized by adopting the structure, which includes a sizing die 81, a guide rod 82 and a guide rod seat 83, wherein the guide rod 82 axially moves in the guide rod seat 83, the sizing die 81 is arranged on the upper portion of the guide rod 82, and the sizing die 81 is a cylinder and is used for extending into the cylindrical die cavity 211 to be matched with the side wall of the cylindrical die cavity 211 to compact the side wall of the paper cover 0, so as to shape the paper cover 0 in the first and third states as shown in fig. 10.
As a modified embodiment, as shown in fig. 9, the knurling mold 7 includes a support 71, a knurling wheel 72 and an eccentric rotating mechanism 73, the eccentric rotating mechanism 73 is rotatably disposed in the support 71, the support 71 is simultaneously matched with the paper cover conveying mold 2 through the structure thereof, and can be matched with the paper cover conveying mold 2 up and down, and the knurling wheel 72 is located at the upper end of the eccentric rotating mechanism 73; when the mold is closed, the knurling wheel 72 enters the cylindrical cavity 211, and the eccentric rotating mechanism 73 rotates to make the knurling wheel 72 compact the side wall of the paper cover 0 for one circle.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. A paper cover forming method is characterized in that: the method comprises the following steps:
the method comprises the following steps: surface oiling is carried out on the paper sheet to be processed;
step two: folding the paper sheet, and processing the paper sheet into a cylindrical paper cover with an opening at one side;
step three: heating the paper cover for the first time to soften the film on the surface of the paper cover;
step four: carrying out primary edge nesting on the paper cover, and primarily bending the lower edge of the side wall of the paper cover inwards;
step five: heating the paper cover for the second time to soften the film on the surface of the paper cover;
step six: secondary edge nesting is carried out on the paper cover, and the lower edge of the side wall of the paper cover is bent inwards to be in place;
step seven: and compacting and shaping the inner side of the paper cover.
2. A method of forming a paper cover as claimed in claim 1, wherein: and step A is also arranged between the step two and the step three, and the step A is used for carrying out pre-pressing and shaping on the paper cover in the step two.
3. A method of forming a paper cover as claimed in claim 1, wherein: and step B is also arranged between the sixth step and the seventh step, and the step B is to carry out knurling and pre-compaction on the inner side of the paper cover in the sixth step.
4. A method of forming a paper cover according to claim 1, 2 or 3, wherein: the paper cover forming method is realized by adopting a paper cover forming mechanism, the paper cover forming mechanism comprises a conveying turntable (1) which is rotationally arranged, a paper cover conveying mould (2) for positioning the paper cover to convey, a paper sheet conveying mechanism (3) for conveying paper sheets, a flanging mould (4) for flanging the paper sheets to form a cylindrical paper cover, a prepressing mould (10) for prepressing and shaping the cylindrical paper cover formed after flanging the flanging mould (4), two groups of heating mechanisms (5) for heating and softening the paper cover, two groups of pit edge moulds (6) for inwards bending the lower part of the side wall of the paper cover, a knurling mould (7) for outwards knurling and compacting the side wall of the paper cover which is inwards bent, a shaping mould (8) for compacting and shaping the paper cover, and an output mechanism (9) for outwards conveying the paper cover, the paper cover conveying moulds (2) are multiple, the paper cover conveying die is characterized in that a plurality of paper cover conveying dies (2) are arranged and arranged in the circumferential direction of a conveying turntable (1), a folding die (4), a pre-pressing die (10), a set of heating mechanism (5), a set of nest edge die (6), another set of heating mechanism (5), another set of nest edge die (6), a knurling die (7), a shaping die (8) and an output mechanism (9) are sequentially arranged below the circumferential direction of the conveying turntable (1) and correspond to stop stations of the paper cover conveying dies (2) above, a paper scrap conveying mechanism (3) is arranged on the side edge of the folding die (4), and an oiling mechanism (11) for oiling paper scraps is arranged at the paper scrap conveying mechanism (3).
5. A method of forming a paper cover as claimed in claim 4, wherein: the paper cover conveying die (2) comprises a fixed die body (212) and a material pushing assembly (213), a cylindrical die cavity (211) used for containing the paper cover is arranged at the lower part of the fixed die body (212), the material pushing assembly (213) extends into the cylindrical die cavity (211) from the upper part of the fixed die body (212) and can move axially, and a channel (214) is arranged on the material pushing assembly (213) and connected with an external air suction mechanism to be used for sucking and positioning the paper cover.
6. A method of forming a paper cover as claimed in claim 5, wherein: the material pushing assembly (213) comprises a push plate (2131) and a guide shaft (2132) which are connected with each other, the push plate (2131) is cylindrical and is accommodated in the cylindrical mold cavity (211), the push plate is matched with the section of the cylindrical mold cavity (211) and is used for abutting against a paper cover, the guide shaft (2132) is arranged in the fixed mold body (212) in a penetrating mode and moves axially, and the channel (214) is axially arranged along the guide shaft (2132) and communicated to one end of the push plate (2131).
7. A method of forming a paper cover as claimed in claim 4, wherein: the nest side die (6) comprises a nest bottom prepressing die (621) and a nest bottom die holder (622) which are coaxially and sequentially arranged from inside to outside, and the nest bottom die holder (622) is provided with an annular groove (6221) for aligning the nest bottom of the side wall of the paper cover; when the paper cover conveying die (2) and the nest side die (6) work relatively, the nest bottom prepressing die (621) and the nest bottom die holder (622) are sequentially matched with the paper cover conveying die (2) through the driving part, the nest bottom prepressing die (621) abuts against the bottom of the paper cover to limit, and the annular groove (6221) of the nest bottom die holder (622) abuts against the side wall of the paper cover to inwards bend the nest bottom.
8. A method of forming a paper cover as claimed in claim 7, wherein: a first elastic piece (623) is arranged between the nest bottom prepressing die (621) and the nest bottom die holder (622), the nest bottom die holder (622) pushes the nest bottom prepressing die (621) to move synchronously through the first elastic piece (623) when moving, and after the nest bottom prepressing die (621) pushes the bottom of the paper cover, the nest bottom die holder (622) compresses the first elastic piece (623) when moving continuously.
9. A method of forming a paper cover as claimed in claim 4, wherein: the flanging die (4) comprises a flanging fixed die (41) and a movable die set (42) which are coaxially arranged, the flanging fixed die (41) is provided with a cylindrical die outlet hole (411) which is axially penetrated, and the periphery of one end, facing the movable die set (42), of the cylindrical die outlet hole (411) is provided with a guide wall (412) which is obliquely arranged; the movable module (42) comprises a pre-pressing outer ring (423), a folding pre-pressing die (422) and a folding bottom die (421) which are coaxially and sequentially arranged from outside to inside, the pre-pressing outer ring (423), the folding pre-pressing die (422) and the folding bottom die (421) are sequentially matched with the folding fixed die (41) through a driving part, the pre-pressing outer ring (423) is in contact fit with the end face of the folding fixed die (41) and is used for pre-pressing and positioning paper sheets to be folded, the folding pre-pressing die (422) is matched with the guide wall (412) and is used for pre-folding out inclination of the paper sheets to be folded when in contact fit, and the folding bottom die (421) is matched with the cylindrical die outlet hole (411) and is used for forming the paper sheets to be folded into a cylindrical paper cover in the cylindrical die outlet hole (411) when being pushed towards the cylindrical die; and when the folding bottom die (421) pushes the paper cover upwards out of the cylindrical die outlet hole (411), the paper cover is pushed to the paper cover conveying die (2) above the folding bottom die to be positioned.
10. A method of forming a paper cover as claimed in claim 9, wherein: the prepressing outer ring (423) and the flanging prepressing die (422) are synchronously pushed through a prepressing ejector rod (424), an elastic component (425) is arranged between the prepressing outer ring (423) and the flanging prepressing die (422) and the prepressing ejector rod (424), and the prepressing outer ring (423) and the flanging prepressing die (422) respectively abut against the end face of the flanging fixed die (41) and the guide wall (412) by virtue of the elasticity of the elastic component (425); when the prepressing outer ring (423) is abutted against the end face of the flanging fixed die (41), the prepressing ejector rod (424) continues to move to enable the flanging prepressing die (422) to be abutted against the guide wall (412);
the pre-pressing device is characterized in that a pre-pressing arrangement frame (43) is arranged at the front end of the pre-pressing ejector rod (424), the pre-pressing arrangement frame (43) comprises a top disc (431), an inner pressing ring (432) and an outer pressing ring (433), the top disc (431) is arranged at the end part of the pre-pressing ejector rod (424), and the inner pressing ring (432) and the outer pressing ring (433) are respectively arranged on the inner side and the outer side of the top disc (431); the outer pressure ring (433) limits the prepressing outer ring (423) upwards through a step (434), and an elastic component (425) is arranged between the prepressing outer ring (423) and the top disc (431); the inner pressing ring (432) limits the flanging pre-pressing die (422) upwards through a step (434), and an elastic component (425) is arranged between the flanging pre-pressing die (422) and the top disc (431).
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| CN201910169714.8A CN109732997B (en) | 2019-03-06 | 2019-03-06 | Paper cover forming method |
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| CN201910169714.8A CN109732997B (en) | 2019-03-06 | 2019-03-06 | Paper cover forming method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5943840A (en) * | 1996-04-25 | 1999-08-31 | Tetra Laval Holdings & Finance, Sa | Method and apparatus for forming the top of a container with a fitment thereon |
| KR100554575B1 (en) * | 2004-08-20 | 2006-04-05 | 서정수 | Paper cap forming machine |
| CN201128255Y (en) * | 2007-11-13 | 2008-10-08 | 林本乔 | Once-forming paper cover maker |
| CN201745219U (en) * | 2010-07-07 | 2011-02-16 | 李海兵 | Paper cover molding machine |
| JP5776325B2 (en) * | 2011-05-18 | 2015-09-09 | 凸版印刷株式会社 | Cup type paper container and method for manufacturing the same |
| CN104802492A (en) * | 2015-03-28 | 2015-07-29 | 安徽国泰印务有限公司 | Wrapping paper surface lamination process |
| CN106335702B (en) * | 2016-09-26 | 2018-04-03 | 瑞安市贝斯特机械有限公司 | A kind of paper cup covers and its processing technology |
| CN108749147A (en) * | 2018-07-20 | 2018-11-06 | 浙江森盟包装有限公司 | The facial tissue molding machine of paper cap |
| CN108749143A (en) * | 2018-07-20 | 2018-11-06 | 浙江森盟包装有限公司 | The water line molding machine of paper cap |
| CN108859273B (en) * | 2018-07-20 | 2024-04-12 | 浙江森创包装有限公司 | Paper cover forming equipment |
| CN109177326A (en) * | 2018-09-20 | 2019-01-11 | 浙江森盟包装有限公司 | Round paper cap moulding process |
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