CN113199739B

CN113199739B - Lid forming system and lid manufacturing method

Info

Publication number: CN113199739B
Application number: CN202110522023.9A
Authority: CN
Inventors: 洪扬志; 何善赟; 方子翔; 马超
Original assignee: Xintianli Technology Co ltd
Current assignee: Xintianli Technology Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2023-03-24
Anticipated expiration: 2041-05-13
Also published as: WO2022237127A1; CN113199739A

Abstract

The invention provides a cover body forming system and a cover body manufacturing method, wherein the cover body manufacturing method comprises the following steps: (A) extruding the feedstock to form a sheet material; (B) Printing a printing pattern on the sheet material; and (C) hot-press forming the printed sheet material to form a cover, thereby manufacturing the integrally printed cover.

Description

Lid forming system and lid manufacturing method

Technical Field

The invention relates to the field of cover body forming equipment, in particular to a cover body forming system and a cover body manufacturing method.

Background

Along with the convenience of outgoing consumption of people, various beverage shops such as coffee shops, milk tea shops and fruit juice shops stand. These commercial stores are dominated by the provision of a variety of ready-to-serve beverages, including hot and cold beverages, and are typically provided in disposable plastic cups or cups that are closed over their mouths for convenient packaging and carrying.

On the other hand, with the great abundance of people's physical life, people have higher and higher requirements for the aesthetic appearance of various articles. The PET cup covers commonly used in the market at present are monochromatic, the color is monotonous and not attractive, and the color with unchanged dust enables users to have aesthetic fatigue. Under the demand, manufacturers develop a two-color cup cover.

The prior art two-color cup covers are mostly formed by assembling two color covers, such as a white cover and a color cover which are used in some yogurt cups. Such caps are cumbersome to produce and expensive to manufacture. The two covers are only overlapped together to form a matched color combination, so that the two covers are easy to fall off when being subjected to external force during transportation.

On the other hand, the existing cover structure is easy to produce overlapping and cannot meet the requirement of automatic line production. That is, in the production line process, the plurality of caps are easily jammed together and not easily separated, thereby not facilitating continuous automated production.

Disclosure of Invention

An object of the present invention is to provide a cover forming system and a cover manufacturing method, which print and color a predetermined position of a sheet material and then thermally press-mold the sheet material to form a unitary cover having different color distributions.

An object of the present invention is to provide a cover forming system and a cover manufacturing method, wherein an outer groove is formed on an outer surface of a cover during forming, so that a boundary between a printing region and a non-printing region is hidden on an inner side surface of the outer groove, and the overall appearance of the cover is more beautiful.

An object of the present invention is to provide a cover forming system and a cover manufacturing method, in which the outer groove is formed in the cover, so that the force-bearing surface is located between the inner clamping groove and the outer groove, thereby increasing the overall structural strength of the cover, and the upper and lower forces are more balanced when the user holds the cover with his hand, and the cover is not easily deformed.

An object of the present invention is to provide a lid forming system and a lid manufacturing method, which are capable of forming a lid by reversely drawing a mold at a predetermined angle on an inner wall of an outer groove of a lid, so that the lid can be engaged with a cup or a container inside or outside without affecting the demolding, and the combination is more stable.

An object of the present invention is to provide a cover forming system and a cover manufacturing method, wherein an inclined draft angle is formed during the manufacturing and forming process, so that when two covers are stacked, a small overlapping area is formed by the support of the edge of the inner clamping groove, thereby preventing the overlapping during the production process of the production line and satisfying the automatic production line.

An object of the present invention is to provide a lid body molding system and a lid body manufacturing method, which can optimize the depth of an outer groove in the production molding process by integrating a plurality of factors such as a printing region area, a printing offset amount, and a transportation cost variation due to a stacking height volume.

An object of the present invention is to provide a cover forming system and a cover manufacturing method, which can print a sensing cursor when printing a sheet material, so as to facilitate accurate positioning and forming during hot press forming.

In order to achieve at least one of the above objects, an aspect of the present invention provides a cover manufacturing method, including:

(A) Extruding the raw material to form a sheet material;

(B) Printing a printing pattern on the sheet material; and

(C) And forming the printed sheet material into a cover body by hot-press forming.

A cover manufacturing method according to an embodiment, wherein the step (a) includes the steps of:

(A1) Mixing the raw materials after the raw materials are measured; and

(A2) And (4) feeding by a feeding machine.

A cover body manufacturing method according to an embodiment, wherein the step (A2) includes the steps of: the magnetic attraction adsorbs impurities.

(A13) Melting the raw materials at a high temperature;

(A14) Filtering the melted raw materials; and

(A15) The sheet material is extruded by a press roller.

A cover manufacturing method according to an embodiment, wherein the step (a) includes the steps of: cooling the sheet material.

A cover manufacturing method according to an embodiment, wherein the step (a) includes the steps of: applying a silicone oil to the sheet material.

A cover manufacturing method according to an embodiment, wherein the step (a) includes the steps of: and detecting and trimming the sheet material.

A cover manufacturing method according to an embodiment, wherein the step (a) includes the steps of: and reeling the sheet material.

A cover manufacturing method according to an embodiment, wherein the step (B) includes the steps of: corona treating the sheet material.

A cover manufacturing method according to an embodiment, wherein the step (B) includes the steps of: and printing the preset position of the sheet material to form the printing pattern and a sensing cursor.

A cover manufacturing method according to an embodiment, wherein the step (B) includes the steps of: baking the printed sheet material.

A cover manufacturing method according to an embodiment, wherein the step (B) includes the steps of: and (5) rolling the baked sheet material.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and conveying the printed sheet material to a cover body forming device.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and detecting the induction cursor to control the cover body forming equipment to work.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and hot-pressing the position corresponding to the printed pattern on the sheet material to form the cover body with an outer groove and an inner clamping groove.

The cap manufacturing method according to an embodiment, wherein when the aperture of the cap is 74mm to 95mm, the depth of the outer groove of the cap is controlled to be 5mm to 6mm.

According to one embodiment, when the caliber of the cover body is 84mm, the depth of the outer groove of the cover body is controlled to be 5.5mm.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and arranging the mold cavity positions of the forming mold of the cover body forming equipment according to a preset layout.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and the number of the mold cavities of the forming mold of the cover body forming equipment is set corresponding to the caliber of the cover body.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and adjusting the row spacing or the column spacing in the die cavity arrangement in the forming die of the cover body forming equipment.

A cover manufacturing method according to an embodiment, wherein the step (C) includes the steps of: and an inward inclined draft angle is formed on the inner side of the outer groove of the cover body.

Drawings

Fig. 1 is a schematic view of a manufacturing process of a cover according to an embodiment of the present invention.

FIG. 2 is a block diagram representation of a cover molding system according to one embodiment of the present invention.

FIG. 3 is a schematic diagram of a cover manufacturing system apparatus according to one embodiment of the present invention.

Fig. 4A-4D are schematic illustrations of a cover manufactured by a cover molding system according to one embodiment of the present invention.

FIG. 5 is a schematic illustration of inward ink deflection of a cover manufactured by the cover molding system according to one embodiment of the present invention.

Fig. 6A-6B are schematic top-out views of a cap made by the cap molding system according to one embodiment of the present invention.

Fig. 7 is a schematic view of a cavity arrangement of a cap molding system according to an embodiment of the present invention.

FIG. 8 is a schematic view of a continuous printed sheet material of a cover forming system according to one embodiment of the present invention.

Fig. 9 is a schematic illustration of a printed graphic of a cover molding system according to an embodiment of the present invention.

FIG. 10 is a schematic cross-sectional view of a cover manufactured by the cover molding system according to one embodiment of the present invention.

FIG. 11 is a schematic view of a plurality of lids being manufactured by the lid forming system according to one embodiment of the present invention in a stacked configuration.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

References to "one embodiment," "an embodiment," "example embodiment," "various embodiments," "some embodiments," etc., indicate that the embodiment described herein may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the feature, structure, or characteristic. In addition, some embodiments may have some, all, or none of the features described for other embodiments.

Referring to fig. 1-11, the present invention provides a lid forming system 1, the lid forming system 1 is used for manufacturing a lid 50, and the lid 50 is not limited to a cup lid, a bowl lid, or the like, for example, which can cover various container bodies.

Referring to fig. 2, the cover forming system 1 includes a sheet material forming apparatus 10, a printing apparatus 20, and a cover forming apparatus 30. The sheet material forming apparatus 10 is used for extruding a particle material into a sheet material 100. The printing apparatus 20 is used to print and color the sheet material 100 at a predetermined position. The cover forming device 30 is used for forming the cover 50 by punching the colored sheet material 100.

In one embodiment, the sheet material forming apparatus 10, the printing apparatus 20, and the cover forming apparatus 30 operate in a continuous process, that is, stock, sheet material 100 is automatically processed continuously between the sheet material forming apparatus 10, the printing apparatus 20, and the cover forming apparatus 30, thereby achieving a continuous, fully automated process for more efficiently manufacturing the covers 50.

For example, the cover 50 is manufactured by the cover forming system 1 by extrusion-molding raw materials to form a sheet material 100, then printing and coloring the sheet material 100, and then press-molding the colored sheet material 100. That is, by this manufacturing method, the integrated lid 50 having different color distributions is formed.

In the manufacturing process, a predetermined position of the sheet material 100 is printed and colored, and then the cover 50 is continuously hot-pressed on the printed sheet material 100, thereby forming the integrated cover 50 with different color distributions.

Referring to fig. 6a,6b,10 and 11, the cover 50 produced by the cover forming system 1 includes a central portion 52 and a peripheral side portion 51, the peripheral side portion 51 surrounding the outside of the central portion 52, the peripheral side portion 51 being adapted to be capped to the container body.

The cover 50 manufactured by the cover molding system 1 has an outer groove 502 and an inner snap groove 501. The outer groove 502 is formed in the outer surface of the lid body 50, recessed in the top surface of the peripheral side portion 51. The inner catching groove 501 is located at the inner side of the cover 50. The central portion 52 forms the outer groove 502, and the peripheral side portion 51 forms the inner catching groove 501.

That is, the inner surface of the outer groove 502 is lower than the height of the top surface of the peripheral side portion 51. In other words, the outer groove 502 is located in the center portion 52, and the inner catching groove 501 is located in the peripheral side portion 51.

The inner snap groove 501 is adapted to be coupled to a rim of the container body. That is, the peripheral side portion 51 and the outer groove 502 region form a convex-concave structure. The diameter of the inner clamping groove 501 corresponding to the clamping position of the container body is the caliber of the cover body 50.

It is worth mentioning that, through the lid 50 forms outer recess 502 for the stress surface is in the middle of interior joint and outer recess 502, can increase the whole structural strength of lid 50, when the user hand held lid 50, the atress was more balanced from top to bottom, and lid 50 non-deformable.

The cover 50 has a printed pattern 101, and the printed pattern 101 is located on the peripheral side portion 51, that is, the peripheral side portion 52 is printed with a predetermined color or pattern. That is, the central portion 52 corresponds to the unprinted pattern 101, and the peripheral side portion 51 corresponds to the printed pattern 101.

Further, the sheet material 100 is preferably a translucent or transparent material, and the printed pattern 101 is located on one side of the sheet material 100. That is, only one side surface of the sheet material 100 is printed during printing, not both side surfaces, and the printed pattern 101 is located on the inner side surface of the cover 50, and the printed pattern 101 is displayed outside the cover 50 by the transparent property of the sheet material 100. It is worth mentioning that the printed side of the sheet material 100 corresponds to the later hot-pressed side.

The printed pattern 101 has a printed boundary 53, and the printed boundary 53 refers to a boundary between the printed pattern 101 and a non-printed pattern 101 of the cover 50. Preferably, the printing interface 53 is located on an inner sidewall of the outer groove 502.

It should be noted that, on the one hand, the outer groove 502 is formed by being recessed inward inside the peripheral side portion 51, and forms a concave-convex structure with the peripheral side portion 51, which can enhance the structural strength of the cover 50, so that the cover 50 is not easily deformed during use; on the other hand, the printing boundary 53 of the printed pattern 101 is located inside the sidewall of the inner clamping groove 501, that is, the outer groove 502 hides the color boundary of the ink printing on the inner wall of the step formed by the peripheral side part 51, so that the color boundary is not easy to be observed from the outside, thereby providing better integration between the printed pattern 101 and the non-printed area.

It is also worth mentioning that the printed pattern 101 is located on the inner side of the cover 50, that is, no color is printed on the outer side, but the printed pattern 100 is displayed on the outer side by the transparent function of the sheet material 100, so that the printed pattern 101 on the peripheral side portion 51 and the non-printed area on the central portion 52 are integrated more effectively.

Referring to fig. 1 and 2, the sheet material forming apparatus 10 of the cover forming system 1 includes a feeding unit 11, an inner treatment unit 12, and a forming unit 13 and an after-treatment unit 14.

The feeding unit 11 is used to feed the raw material into the sheet material forming apparatus 10. The feeding unit 11 comprises a metering and mixing component which mixes and stirs the raw materials according to the weight and proportion of the preset raw materials.

In one embodiment, the metering and mixing element includes a plurality of feed channels, each feed channel corresponding to a plurality of materials, such as a first channel corresponding to a first material, a second channel corresponding to a second material, and a third channel corresponding to a third material. The first channel, the second channel and the third channel respectively meter the quality of the fed raw materials and control the quality of the fed raw materials, for example, the ratio of a plurality of raw materials corresponding to each channel is controlled by controlling the feeding speed of each channel. By way of example and not limitation, the feedstock is a granular feedstock, and each of the channels controls the amount of feedstock fed by means of a screen.

In one embodiment, the feeding unit 11 comprises a dosing means for dosing the inner treatment unit 12. Further, the feeding unit 11 includes an impurity removing component, the impurity removing component is disposed on the feeding component and is configured to remove impurities in the raw material fed by the feeding component, for example, but not limited to, the impurity removing component is a magnetic component, and the impurities in the raw material are removed by magnetic attraction.

The inner treatment unit 12 comprises a high temperature melting chamber which melts the raw material fed by the feeding unit 11 at a high temperature, for example, but not limited to, heating the granular solid raw material to a molten state.

The inner treatment unit 12 comprises a filtering element which filters the raw material in the molten state and feeds it to the forming unit 13. The forming unit 13 forms the sheet raw material by press roll extrusion forming of the sheet material 100.

It is worth mentioning that in the sheet material forming apparatus 10, the filtered molten raw material is sent to a forming unit 13 for forming, that is, more uniform molten raw material is sent to the forming apparatus, so that the material structure of the sheet material 100 formed by the forming unit 13 is more uniform. Further, in this state, the sheet material 100 is a flexible sheet material 100.

The molding unit 13 feeds the molded sheet material 100 into the post-processing unit 14. The post-treatment unit 14 includes a cooling assembly that cools the sheet material 100, for example, but not limited to, by multi-stage roller cooling. For example, the sheet material 100 is sequentially transferred through the cooling roller, so that the temperature of the flexible sheet material 100 is then gradually decreased, and the hardness of the sheet material 100 is increased as the temperature is decreased.

The post-treatment unit 14 includes a surface treatment member for treating the surface of the sheet material 100, for example, but not limited to, smoothing the surface of the sheet material 100. It is worth mentioning that the surface after extrusion molding is made to meet predetermined requirements, such as improvement of surface flatness and smoothness, by surface treatment, so as to facilitate the later process of molding the cover body 50 and make the surface of the cover body 50 more flat and smooth.

The post-processing unit 14 includes a detection cutting part that detects the edge size and edge regularity of the sheet material 100 and cuts the edge of the sheet material 100 to obtain a sheet material 100 of a predetermined size and edge regularity for subsequent molding of the cover 50.

The post-processing unit 14 includes a winding unit for winding up the sheet material 100 fed out by the post-processing unit 14 and feeding it into the printing apparatus 20. That is, the processes of connecting the sheet material forming apparatus 10 and the printing apparatus 20 by the take-up apparatus, so that the press forming of the sheet material 100 and the printing of the sheet material 100 are continuously performed, not intermittently or by a relay manner.

Further, the post-processing unit 14 includes a recycling component, and the recycling component recycles the waste and the defective products processed by the post-processing unit 14, and sends the recycled materials to the sheet material forming device 10, that is, recycles the raw materials.

Referring to fig. 1 to 5, the printing apparatus 20 includes a corona unit 21, a printing unit 22, a baking unit 23, and a printing and winding unit 24, and the corona unit is used for performing corona treatment on the optical sheet, increasing surface tension, and increasing adhesion force of ink printing. The printing component is used for transferring the prepared ink to the plate roller through the anilox roller and then to the sheet material 100 through the plate roller, so that printing is realized. The baking unit 23 is configured to perform a drying process on the printed sheet material 100. The ink is cured, for example but not limited to, by a fiber-optic type curing by being irradiated with light from a UV lamp at 6000V.

The printing unit 22 forms a predetermined pattern of the cover 50 at a predetermined position of the sheet material 100, that is, the printing unit 22 forms at least one printing pattern 101, and the printing pattern 101 corresponds to a position of the cover 50 to be formed subsequently. That is, the printing unit 22 prints the printing pattern 101 forming the cover 50, and determines the position of the printing boundary 53 during printing, so as to form the cover 50 with a predetermined shape and color distribution.

Further, the printing unit 22 continuously prints printing patterns 101 forming a predetermined arrangement layout on the sheet material 100, and each printing pattern 101 unit corresponds to a molding area of one cover 50.

By way of example and not limitation, during operation of the printing unit 22, ink is transferred from the anilox roller to the plate roller and from the plate roller to the sheet material 100, thereby printing. In the embodiment of the invention, the printed color is firmer and clearer by printing for multiple times by the rollers.

The printing device 20 includes a print winding unit 24, and the print winding unit 24 winds the printed sheet material 100 and feeds the printed sheet material into the cover forming device 30, that is, the working processes of the printing device 20 and the cover forming device 30 are continuous through the print winding unit 24, that is, a continuous automatic process is formed.

It is worth mentioning that in the conventional plastic products such as lids, cups and the like, the cover 50 is generally monochromatic, such as transparent or translucent, the color is generally determined by the raw material, so that different color patterns cannot be formed at local positions, and the color of the surface is generally increased by means of stacking or pasting, whereas in the embodiment of the present invention, the predetermined color pattern is printed at a predetermined position on the raw material of the sheet material 100 formed by the cover 50 by means of direct printing, so that the integrity of the pattern color of the cover 50 is better, and the pattern color can be maintained for a long time, and the present invention has a wide market application value.

It is also worth mentioning that in the printing process, during the continuous printing process, a plurality of printing sections 102 are formed on one side surface of the continuous sheet material 100, each of the printing sections 102 includes a plurality of printing patterns 101, and one printing pattern 101 corresponds to one cover 50.

The printing section 102 corresponds to the cavity arrangement of the forming mold 32 to be subsequently proposed. That is, a segment of the printing section 102 corresponds to the position and number of the arrangement formed by the forming die 32 at one time.

It is also worth mentioning that in the course of the research conducted by the inventor, it was found that although it is expected that the printing boundary 53 of the cover 50 which is desired to be manufactured can be hidden in the inner side wall of the groove or meet the requirement of the predetermined printing limit, there are a plurality of factors affecting the position of the printing boundary 53, which are difficult to control in general, such as the following:

1. heating during ink printing causes the sheet material 100 to sag and deform, and thus the ink registration printing is offset.

2. The depth h of the outer groove 502 is large. When the depth h of the outer groove 502 is small, the color cross phenomenon occurs at the bottom of the cover 50, that is, the printing boundary 53 of the ink printing is shifted to the inner surface of the groove, and when the depth h of the outer groove 502 is large, the printing boundary 53 of the ink printing is shifted outward to the top surface of the peripheral side portion 51 of the cover 50. On the other hand, the depth h of the groove affects the stacking height during transportation, i.e. the overall volume of the stacked covers 50 increases, which results in the increase of packaging auxiliary materials and transportation finished products, and the products are more obtrusive to watch.

3. The aperture size of the lid 50. The size of the cover 50 also affects the offset of the print boundary 53 of the ink print being formed for the same height. The aperture size of the cover 50 affects the cavity arrangement in the forming die 32. For example, the larger the aperture, the less the cavity arrangement amount, and the smaller the aperture, the greater the cavity arrangement amount. And the amount of arrangement affects the degree to which the sheet material 100 sags when heated. For example, the larger the arrangement amount of the mold cavities is, the more serious the heating sagging of the sheet material 100 is, the more difficult the process adjustment of the printing position is, the smaller the arrangement amount is, the smaller the sagging of the sheet material 100 is, and the difficulty of the process adjustment of the printing position is reduced.

4. In the process of manufacturing the batch multi-mold cavity, different mold cavity positions, deformation quantities and offset measuring tools are different. That is, the number and location of the mold cavities are also one of the factors. For example, the amount of sagging deformation at the edge is small and the amount of sagging deformation at the center is large. The larger the number of the mold cavities, the larger the deformation, and the smaller the number of the mold cavities, the smaller the deformation.

Therefore, in the process of manufacturing the cover 50, in order to make the printing quality of the cover 50 meet the predetermined requirement, and balance the offset, the packaging and transportation cost, and the overall appearance of the product, it is a difficulty of the present invention to determine the manufacturing parameters of the cover 50, such as the specific size of the cover 50 and the depth of the groove corresponding to the cover 50.

In the manufacturing and molding, the punching depth of the outer groove 502 is preferable in consideration of a plurality of factors such as the area of the printed pattern 101, the amount of printing offset, and the variation in transportation cost due to the volume of the stacked space.

Referring to fig. 4D, each of the printed patterns 101 corresponds to a diameter dimension designated D1 and a print ring width dimension designated L1.

Referring to fig. 7, in the manufacturing process of the cover 50, two situations of the offset of the printing boundary 53 may occur, one of which is that the printing boundary 53 is offset inward, that is, the printing pattern 101 appears on the inner bottom surface of the outer groove 502 of the cover 50, or the printing boundary 53 appears on the bottom surface of the outer groove 502. Defining the distance between the printing interface 53 and the groove sidewall 5022 as X, in other words, the value of X represents the size of the printed image 101 area appearing inside the outer groove 502, the ink offset X at the bottom of the outer groove 502 should be smaller than a predetermined value in order to meet the product printing quality requirement. For example, when the sheet material of the cover 50 is white, the non-printed pattern is white, i.e., the color of the sheet material. And the printed graphic 101 is non-white, such as red, orange, yellow, green, cyan, blue, violet, black, or a predetermined color scheme, i.e., a color different from that of the sheet material 100. If inward deflection of the print interface 53 occurs, a process color different from the color of the sheet material 100 occurs at the bottom of the groove. In this embodiment of the invention, preferably X.ltoreq.3 mm.

Referring to fig. 8, another situation is where the printing interface 53 is offset outwardly, i.e., where an unprinted graphic 101 area is present on the top surface of the peripheral side portion 51 of the cover 50. Defining the distance from the printing boundary 53 to the inner side of the top surface of the peripheral side portion 51 as Y or as top white exposure Y, in other words, the value of Y represents the size of the area of the unprinted graphics 101 appearing at the top of the peripheral side portion 51, then in order to meet the product printing quality requirement, the inner side of the top of the peripheral side portion 51 should be less than a predetermined value, for example, when the sheet material is transparent, the unprinted graphics 101 are transparent, i.e., the color of the sheet material. The printed image 101 is a non-transparent color or a darker color, such as red, orange, yellow, green, cyan, blue, violet, black, or a predetermined color scheme, i.e., a color different from the sheet material 100. If the print boundary 53 is shifted outward, the same color as the color of the sheet material 100, such as white, appears on the top surface of the peripheral side portion 51. In this embodiment of the invention, Y.ltoreq.1 mm is preferred.

That is, in the manufacturing process of the cap 50, the X value and the Y value should be within a predetermined parameter range.

Further, in the process of research by the inventor, it was found that, for the cover 50 with a predetermined size and a predetermined printing width, for example, the caliber diameter D of the cover 50 is 70mm to 90mm, the width L1 of the printed pattern 101 domain is, and at this time, the depth h of the outer groove 502 affects the ink offset. The depth of the outer groove 502 affects the stacking height of the cover 50, and when the depth h of the outer groove 502 is large, the stacking height increases, which leads to the increase of the packing material and the transportation cost, and the product is more obtrusive to view. With a smaller groove depth h, the ink can deflect inward as the sheet material 100 sags due to heating during printing.

When the caliber diameter D1 of the cover body 50 is 70mm-95mm, the different depths h of the outer groove 502 at the top of the product are tested, and the offset of the ink is observed, so that the product top exposure can be less than or equal to 1mm when the depth h of the outer groove 502 at the top is 5-6mm, the offset of the ink at the bottom of the groove is less than or equal to 3mm, and the product stacking production can be realized. When the depth h of the outer groove 502 at the top is less than 5mm, the body material 100 may sag due to heating, and the ink printing position on the body material 100 may be shifted greatly, which may not satisfy the requirement. The product is not beautiful because of the printing defective products of the individual hole numbers after the product is demoulded. The depth h of the outer groove 502 is more than 6mm. The stacking height can be increased, so that the packaging material auxiliary material and the transportation cost are increased, and the product is more obtrusive to watch. The top outer groove 502 tests most reasonably at a depth h of 5-6 mm.

The cover body forming device 30 comprises a positioning unit 31, a forming die 32 and a conveying unit 33, wherein the positioning unit 31 performs pre-positioning on the printed sheet material 100 and determines the position of the sheet material 100 which is fed into the cover body forming device 30 for forming. The forming die 32 performs hot press forming on the device to which the printing unit 22 is sent, and the conveying unit 33 sends out the sheet material 100 after hot press forming.

The positioning unit 31 includes an induction cursor 311 and a detection sensor 312, the induction cursor 311 is disposed at a predetermined position of the sheet material 100, the detection sensor 312 detects the induction cursor 311, and when the detection sensor 312 detects the induction cursor 311, the cover forming device 30 performs the hot press forming on the sheet material 100. The detection sensor 312 is provided outside the molding die 32 of the lid body 50.

The printing unit 22 further prints and forms the sensing cursor 311 at a predetermined position of the sheet material 100, and the sensing cursor 311 is used for performing positioning and hot press forming by matching with the cover forming device 30. The sensing cursor 311 is formed by the printing device 20, that is, in the process of printing the printed pattern 101 by the printing device 20, the sensing cursor 311 is printed and formed at a predetermined position of the sheet material 100, so that the positioning unit 31 in the cover forming device 30 can perform forming positioning. In other words, the printing device 20 refers to the printed figures 101 and the inductive cursor 311 formed at different predetermined positions of the sheet material 100.

The detection sensor 312 is exemplified by, but not limited to, a white light spot photosensor LR-WF10 (C). The photoelectric sensor positions the sensing cursor 311 on the sheet material 100 to realize the positioning of the sheet material 100.

Further, the positioning unit 31 positions the print position of the predetermined layout. That is, after the positioning unit 31 positions the determined position, the cover forming device 30 forms the predetermined position, that is, forms the cover 50 at the predetermined position.

Further, the distance setting position between the sensing cursors 311 corresponds to the layout of the forming mold 32, that is, the two sensing cursors 311 correspond to the layout amount of one-step forming. In one embodiment of the present invention, the sensing cursors 311 are disposed in a single row on one side of the sheet material 100. That is, the detection sensor 312 detects a single point, and when the detection sensor 312 detects the sensing cursor 311, the molding die 32 molds and performs the hot press molding of the lid body 50. In another embodiment of the present invention, the sensing cursors 311 are printed on both sides of the sheet material 100, that is, the detection sensor 312 performs double-point detection in order to more accurately position the molding position of the sheet material 100. One of the printed sections 102 corresponds to one of the sensing cursors 311. That is, when the molding die 32 works and the sensing cursor 311 is detected, a segment of the printing segment 102 is hot-pressed, and then the molded printing segment 102 is sent out to continue hot-pressing the next segment of the printing segment 102.

Cover body former 30 during operation, printing unit 22 is continuous after will printing the sheet material 100 sends into lid 50 forming die 32 works as positioning unit 31 detection sensor 312 detects during response cursor 311, lid 50 forming die 32 compound die thermoforming, the die sinking behind the shaping, conveying unit 33 cooperation printing unit 22 the roll-up equipment is continuous sheet material 100 sends out to make next typeset sheet material 100 is sent into, realizes continuous printing and hot pressing process from this.

Referring to fig. 9, the forming mold 32 includes a plurality of mold cavities 321, and the mold cavities 321 correspond to forming positions of the forming covers. That is, one of the cavities 321 is hot press molded to form one of the caps 50. The mold cavities 321 are arranged in a predetermined array.

Furthermore, the mold cavities 321 with different numbers are correspondingly arranged for the cover bodies 50 with different calibers. Preferably, the cover 50 with a diameter of 74mm corresponds to the mold cavities 321 with 64 numbers, which are numbered 1-64. 64. The die cavities are arranged in 8 rows and 8 columns. The mold cavities 321 are numbered in sequence from the left side to the top side.

The cover 50 with the caliber of 84mm corresponds to the mold cavities 321 with 56 numbers, and the numbers are 1-56. 56. The arrangement of the mold cavities is 8 rows and 7 columns. Refer to fig. 9. The mold cavities 321 are numbered in sequence from the left side to the top side. Preferably, the cover 50 having an aperture of 84mm has a diameter D1 of 97mm corresponding to the print pattern 101, and a print width L1 of 25.5mm.

The cover 50 with the caliber of 90mm corresponds to the mold cavities 321 with 46 numbers, and the numbers are 1-46. The mold cavities 321 are numbered in sequence from the left side to the top side.

The cover 50 with the caliber of 95mm corresponds to the mold cavities 321 with 46 numbers, and the number is 1-46. The mold cavities 321 are numbered in sequence from the left side to the top side.

The following is a statistical table of the mold cavity positions and the printing offsets corresponding to the molding of the cap 50 with different calibers. The die number refers to the die cavity position number.

Influence of the depth of the outer groove at the top of a 74mm caliber on the ink offset

TABLE 1

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Influence of depth of outer groove at top of 84mm caliber on ink offset

TABLE 2

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Influence of depth of outer groove at top with 90mm caliber on ink offset

TABLE 3

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Influence of depth of outer groove at top of 95mm caliber on ink offset

TABLE 4

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Further, referring to fig. 10 and 11, the sidewall of the outer groove 502 of the cover 50 has a draft angle that is inclined inward, preferably 60 filaments. In the reverse drawing, the outer groove 502 is formed to have a larger bottom and a smaller upper opening, and accordingly, the inner groove is formed to have a larger top and a smaller bottom inside the peripheral side portion 51,

therefore, when two covers 50 are stacked, the top surface of the peripheral side portion 51 with a larger area is supported on the bottom edge of the inner clamping groove 501 with a smaller opening of the upper cover 50, so that the peripheral side portion 51 of the two covers 50 and the inner clamping groove 501 are prevented from being sleeved, and overlapping clamping is avoided.

It is worth mentioning that when the side wall of the outer groove 502 is vertical, the side wall of the inner clamping groove 501 of the peripheral side portion 52 of the cover 50 is substantially vertical, so that when two covers 50 are stacked, an overlapping phenomenon is easy to occur, i.e. two covers 50 stacked on each other are clamped together relatively tightly and are not easy to separate, which is inconvenient for the subsequent automated production process. In the embodiment of the present invention, when the outer groove 502 is formed, the inwardly inclined draft angle is formed by a predetermined draft angle, so that the two stacked cover bodies 50 are not clamped at the inner groove of the peripheral portion 51, and a subsequent automatic production process, such as an automatic cover picking process, can be satisfied. When the outer groove 502 is formed, the cover body 50 is reversely drawn at a preset angle, so that the cover body 50 is combined with a cup or a container in a clamping manner in an internal-external matching manner under the condition that the demolding is not influenced, and the combination is more stable.

In the manufacturing process, the sheet material 100 after being hot-pressed is sent to a punching device, and the hot-pressed cover 50 is punched by the punching device to form the individual cover 50 having a predetermined shape structure.

For example, the processing procedure of the cover 50 is as follows: the pellet type raw material is fed after being measured and stirred by the feeding unit 11, the raw material after being measured and stirred is fed into the inner treatment unit 12 by the feeding means of the feeding unit 11, the raw material is melted and filtered by the high temperature melting furnace chamber of the inner treatment unit 12, and then is extruded, the extruded sheet material 100 is further cooled, the surface treatment is performed on the sheet material 100 after being cooled, and then the sheet material 100 is wound and cut. Further automatically will roll up back the continuous lithography apparatus 20 of lamellar body material 100, right lamellar body material 100 carries out corona treatment, later prints, further to after printing lamellar body material 100 toasts, rolls up after toasting, later with after printing lamellar body material 100 sends into former, promptly, goes up the piece, and further, after printing lamellar body material 100 carries out high temperature thermoforming, later with after the thermoforming lamellar body material 100 carries out the punching press, promptly, obtains the solitary of predetermined shape lid 50.

It should be noted that, in the manufacturing process of the cover 50 of the present invention, the defective products and the leftover materials formed in different manufacturing stages are all recycled, so that the overall cost of the product is reduced, and the waste materials or no waste materials are generated, which is more environment-friendly. Referring to fig. 1, after the sheet material 100 is formed, the continuous strip of sheet material 100 is cut, and after cutting, the edge material is returned to the stock dispensing position. The scraps formed when the cover body 50 is press-punched after the hot press molding are also returned to the press-punching machine for recycling and reusing. It is worth mentioning that no significant waste is generated in other stages of manufacturing, and therefore, the waste is recycled in the forming stage and the punching and blanking stage of the sheet material 100, so that the waste is recycled as a whole.

Referring to fig. 1 to 11, the present invention provides a method for manufacturing a cap, which includes the steps of:

(S1) extruding the raw material forming material to form a sheet material 100;

(S2) printing a printing pattern 101 on the sheet material 100; and

(S3) hot press forming the printed sheet material 100 to form a cover 50.

The step (S1) may be referred to as a tab process, and the step (S2) may be referred to as a printing process; the step (S3) may also be referred to as a molding step.

The step (S1) includes the steps of:

(S11) metering the raw materials and mixing the raw materials; and

(S12) feeding by a feeding machine; wherein the step (S12) includes the steps of: the magnetic attraction adsorbs impurities.

The step (S1) further includes the steps of:

(S13) melting the raw material at a high temperature;

(S14) filtering the molten raw material;

(S15) pressing rollers to extrude the sheet material 100;

(S16) cooling the sheet material 100;

(S17) applying silicone oil to the sheet material 100;

(S18) detecting and trimming the sheet material 100;

(S19) winding up the sheet material 100.

The step (S18) may include the steps of: and (4) recycling the waste materials.

The step (S2) includes the steps of:

(S21) corona-treating the sheet material 100;

(S22) printing a predetermined position of the sheet material 100 to form the printed pattern 101 and a sensing cursor 311;

(S23) baking the sheet material 100 after printing;

(S24) winding up the baked sheet material 100;

the step (S3) includes the steps of:

(S31) conveying the printed sheet material 100 to a cover forming apparatus 30;

(S32) detecting that the sensing cursor 32 controls the cover molding device 30;

(S33) forming the cover 50 having an outer groove 502 and an inner catching groove 501 on the sheet material 100 by heat pressing at a position corresponding to the printed pattern 101.

In the step (S33), the depth of the outer groove 502 is controlled to be within a predetermined range for the cover 50 having a predetermined caliber. When the caliber of the cover 50 is 74mm to 95mm, the depth of the outer groove 502 of the cover 50 is controlled to be 5mm to 6mm. When the caliber of the cover 50 is 84mm, the depth of the outer groove 502 of the cover 50 is controlled to be 5.5mm.

The step (S3) comprises the steps of: the mold cavities 321 of the molding dies 32 of the cap body molding apparatus 30 are arranged in a predetermined layout. The horizontal direction is defined as rows and the vertical direction is defined as columns. For example, the rows and columns are equally spaced; or staggered arrangement, for example, from outside to inside, the distance between each column is consistent, and the distance between two adjacent rows is gradually reduced. It should be noted that, by adjusting the pitch, the sagging amount of the ink printing and the offset of the ink can be balanced, that is, the offset of the ink of the cover 50 corresponding to different mold cavity positions in the plate-shaped sheet material 100 can be controlled within a predetermined range.

Further, the number of the cavities 321 of the forming mold 32 corresponding to the aperture 74mm of the cover 50 is 64. The number of the mold cavities 321 of the forming mold 32 corresponding to the cover body aperture of 84mm is 56. The number of the mold cavities 321 of the forming mold 32 corresponding to the cover 50 with the caliber of 90mm-95mm is 49 cavities.

The step (S3) includes the steps of: the mold cavities 321 of the hot press molding die 32 are arranged in a predetermined arrangement.

The step (S3) includes the steps of: the number of the mold cavities 321 of the hot press molding die 32 is set corresponding to the aperture of the cover 50.

The step (S3) includes the steps of: the row-to-row pitch in the arrangement of the cavities 321 in the hot-press molding die 32 is adjusted.

The step (S3) includes the steps of: an inwardly inclined draft angle is formed at the inner side of the outer groove 502 of the cap 50.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A cover manufacturing method, the cover having an outer groove and an inner engaging groove, the outer groove being formed on an outer surface of the cover and recessed in a top surface of a peripheral side portion of the cover, the inner engaging groove being formed on an inner side of the cover, the outer groove being formed in a central portion of the cover, the peripheral side portion forming the inner engaging groove, the peripheral side portion and the outer groove region forming a convex-concave structure, the cover having a printed pattern, the printed pattern being provided on the peripheral side portion, the peripheral side portion being provided with a predetermined color or pattern by printing, the central portion corresponding to an unprinted pattern, the peripheral side portion corresponding to a printed pattern, comprising:

(A) Extruding the raw material to form a sheet material;

(B) Printing the sheet material to form the printing pattern, wherein the printing pattern has a printing boundary, namely the boundary of the printing pattern of the cover body and the non-printing pattern; the printing boundary is located on the inner side wall of the outer groove, and the printing boundary is located on the inner side of the side wall of the inner clamping groove, and

(C) Hot-press forming the printed sheet material, and hot-pressing the position corresponding to the printed pattern on the sheet material to form the cover body with an outer groove and an inner clamping groove, wherein,

in the continuous printing process, one side surface of the continuous sheet material forms a plurality of printing sections, each printing section comprises a plurality of printing patterns, and one printing pattern corresponds to one cover body; the printing sections correspond to the die cavity arrangement mode of a forming die used in hot press forming, namely the arrangement position and the number of one-step forming of one section of the printing section corresponding to the forming die;

during manufacturing and molding, the stamping depth of the outer groove is optimized by combining the area of the printing pattern, the printing offset and the stacking height volume,

when the aperture of the cover body is 74mm to 95mm, the cover body is controlled, the depth of the outer groove is 5mm to 6mm, the product top white exposure is less than or equal to 1mm, the ink offset at the bottom of the groove is less than or equal to 3mm, and the product stacking production is met.

2. The cover manufacturing method according to claim 1, wherein the step (a) includes the steps of:

(A1) Mixing the raw materials after the raw materials are measured; and

(A2) And feeding by a feeding machine.

3. The cover manufacturing method according to claim 2, wherein the step (A2) includes the steps of: the magnetic attraction adsorbs impurities.

4. The cover manufacturing method according to claim 1, wherein the step (a) includes the steps of:

(A13) Melting the raw materials at a high temperature;

(A14) Filtering the melted raw materials; and

(A15) The sheet material is extruded by a press roller.

5. The cover manufacturing method according to claim 1, wherein the step (a) includes the steps of: cooling the sheet material.

6. The cover manufacturing method according to claim 1, wherein the step (a) includes the steps of: applying a silicone oil to the sheet material.

7. The cover manufacturing method according to claim 1, wherein the step (a) includes the steps of: and detecting and trimming the sheet material.

8. The cover manufacturing method according to claim 1, wherein the step (a) includes the steps of: and reeling the sheet material.

9. The cover manufacturing method according to claim 1, wherein the step (B) includes the steps of: corona treating the sheet material.

10. The cover manufacturing method according to claim 1, wherein the step (B) includes the steps of: and printing the preset position of the sheet material to form the printing pattern and a sensing cursor.

11. The cover manufacturing method according to claim 1, wherein the step (B) includes the steps of: baking the printed sheet material.

12. The cover manufacturing method according to claim 11, wherein the step (B) includes the steps of: and (5) rolling the baked sheet material.

13. The cover manufacturing method according to claim 1, wherein the step (C) includes the steps of: and conveying the printed sheet material to a cover body forming device.

14. The cover manufacturing method according to claim 10, wherein the step (C) includes the steps of: and detecting the induction cursor to control the cover body forming equipment to work.

15. The cap manufacturing method according to claim 1, wherein the depth of the outer groove of the cap is controlled to be 5.5mm when the caliber of the cap is 84 mm.

16. The cover manufacturing method according to claim 1, wherein the step (C) includes the steps of: and arranging the mold cavity positions of the forming mold of the hot-pressing cover body forming equipment according to a preset layout.

17. The cover manufacturing method according to claim 1, wherein the step (C) includes the steps of: and the number of the mold cavities of the forming mold of the cover body forming equipment is set corresponding to the caliber of the cover body.

18. The cover manufacturing method according to claim 1, wherein the step (C) includes the steps of: and adjusting the row spacing or the column spacing in the die cavity arrangement in the forming die of the cover body forming equipment.

19. The cover manufacturing method according to claim 1, wherein the step (C) includes the steps of: and an inward inclined draft angle is formed on the inner side of the outer groove of the cover body.