Manufacturing mold, manufacturing method and finished product for forming inner concave arc on paper plastic cup cover

Abstract

A manufacturing mold, manufacturing method and finished product for forming an inward concave arc on a paper plastic cup cover. The created manufacturing mold is used to implement the claimed manufacturing method, so that a paper plastic cup cover that has not yet formed an inward concave arc can be formed into a paper plastic cup cover finished product with an inward concave arc; the manufacturing mold mainly has a rubber ring inside, and during processing, the rubber ring is driven to press against the side of the paper plastic cup cover that has not yet formed an inward concave arc, so that the paper plastic cup cover quickly forms a part with an inward concave arc.

Description

[Technical field]

[0001] The present invention relates to a manufacturing mold, a manufacturing method and a finished product for forming an inner concave arc on a paper-plastic cup cover, that is, a manufacturing mold and a manufacturing method that can conveniently form an inner concave arc, and a paper-plastic cup cover finished product obtained by using the manufacturing mold to implement the manufacturing method. [Background technology]

[0002] Many people, especially office workers, buy a cup of coffee from brand chain supermarkets or fast food restaurants almost every day to start their day's work. Without coffee, they seem to lose their enthusiasm for work. If consumers do not bring their own cups for such take-away beverages (not limited to coffee, but also a variety of beverages), supermarkets or fast food restaurants will help consumers pack them with "take-away paper cups", so that consumers can hold the "take-away paper cups" to achieve the function of carrying and drinking at any time. "Take-away paper cups" are often also called "disposable paper cups", "disposable handy cups" or "disposable paper cups". Currently, the commonly known take-away paper cups are generally composed of a cup body and a cup cover, the cup body is used to hold liquid beverages, and the cup cover is closed at the mouth of the cup body to prevent the liquid beverage in the cup body from overflowing.

[0003] Currently, "paper-plastic cup lids" are available on the market. The so-called "paper-plastic cup lids" are made of a mixture of pulp and / or plant fiber materials, and are made of paper-plastic products through mold suction shaping and hot pressing technology. Compared with "plastic cup lids", "paper-plastic cup lids" are easy to dispose of, the materials are reusable, and they do not cause environmental pollution. They fully meet the requirements of environmental protection and carbon reduction. Therefore, they have been valued by various countries and recommended for use by various environmental protection groups.

[0004] A conventional simple paper plastic cup cover Figures 1 to 3 As shown, it is a paper-plastic cup cover 1, which has a top surface 11 in structure. The top surface 11 is provided with a drinking port 111 to facilitate drinking the beverage in the cup body. The top surface 11 may have various structures, but since the various structures on the top surface 11 are irrelevant to the discussion of this case, the various possible structures on the top surface 11 are not described in detail; the periphery of the top surface 11 droops in an arc to form an upper surrounding wall 12, the bottom edge of the upper surrounding wall 12 expands outward and then droops in an arc and is slightly concave inward to form an outer covering edge 13, the bottom edge of the outer covering edge 13 is in a state of being concave and then expanding outward in the opposite direction, thereby forming an inner concave arc 14, and then the bottom edge of the inner concave arc 14 deviates outward to form a lifting wall 15.

[0005] A conventional exquisite paper plastic cup cover Figures 4-5As shown, it is also a paper-plastic cup cover 1 (the parts with the same structure are numbered the same, the same below), and the structure also has a top surface 11, and the top surface 11 is also provided with a drinking port 111 to facilitate drinking the beverage in the cup body. As mentioned above, the top surface 11 has different structures, but because it is irrelevant to the discussion of this case, it is not described in detail; then the periphery of the top surface 11 sags in an arc to form an upper surrounding wall 12, and the bottom edge of the upper surrounding wall 12 expands outward and then sags in an arc and is slightly concave inward to form an outer covering edge 13, and the bottom edge of the outer covering edge 13 is concave and then expands outward in the opposite direction, so as to form an inner concave arc 14, and then the bottom edge of the inner concave arc 14 deviates outward to form a lifting wall 15.

[0006] Regardless of the conventional simple paper-plastic cup cover or the exquisite paper-plastic cup cover, the single-side cross-sectional view of the paper-plastic cup cover 1 is as follows: Figure 7 As shown (a simple paper plastic cup cover is shown, and the same is true for a delicate paper plastic cup cover), a sectional view of the paper plastic cup cover 1 when it is covered on the corresponding cup body 2 is shown in FIG. Figure 8 As shown, since the outer ring of the cup mouth of the conventional cup body 2 is an outer flange 21, the most ideal relative covering (use) relationship between the paper plastic cup cover 1 and the cup body 2 is as follows Figure 8 As shown, when the paper plastic cup cover 1 is closed on the cup mouth of the cup body 2, it cannot be completely closed at first, so force must be applied first to make the outer covering edge 13 on one side of the paper plastic cup cover 1 cover the outer flange 21 of the corresponding part of the cup body 2 as much as possible, and then further force is applied to make the remaining outer covering edges 13 slightly expand outward and then return to forcefully cross the remaining corresponding outer flanges 21, so that the outer covering edge 13 as a whole tightly covers the entire outer flange 21 of the cup body 2. At this time, the inner concave arc 14 of the paper plastic cup cover 1 obliquely supports the outer bottom edge of the outer flange 21, so that the closed paper plastic cup cover 1 can be difficult to be lifted up, thereby enhancing the covering stability between the outer covering edge 13 and the outer flange 21. In other words, the paper plastic cup cover 1 can achieve an absolutely sealed cover with the cup body 2 because the paper plastic cup cover 1 has the effect of the outer covering edge 13 and the inner concave arc 14. Among them, the outer covering edge 13 mainly achieves a tight covering with the outer flange 21 of the cup body 2, and the inner concave arc 14 can be inclined inwardly against the outer bottom edge of the outer flange 21 of the cup body 2, making it difficult for the paper plastic cup cover 1 to be lifted up.

[0007] Figure 7 , 8 In the paper-plastic cup cover 1 shown in FIG. 1 , the concave arc 14 is produced after a processing step (i.e., the manufacturing method claimed by the present invention). Therefore, before the processing step, the paper-plastic cup cover 1 is Figure 6As shown in the figure, the finished product of the paper-plastic cup lid is made after two continuous processes: (a) the slurry suction mold is used for slurry suction shaping and (b) the hot pressing mold is used for hot pressing shaping. Figure 6 It can be seen that the top surface 11, the upper surrounding wall 12, the outer edge 13 and the lifting wall 15 are all completely presented, and only the inner concave arc 14 has not yet appeared. This is because there is a directional restriction when the slurry suction mold is opened, resulting in the outer edge 13 and the inner concave arc 14, which are continuous reverse curved arcs, cannot appear at the same time. Therefore, only the outer edge 13 and the lifting wall 15 can be made first, and then go through another processing process to make the inner concave arc 14 appear.

[0008] There are also patents that first shape the "outer edge" and then process the "inner concave arc" part, such as Taiwan Patent TW I430923 and China Patent CN ZL200910157668.6 "Method for manufacturing barb groove of plant fiber molded cup lid". It uses a set of sliders to press against the surface of the paper plastic cup lid, and a ring-shaped concave receiving groove on an inner mold corresponds to the place where the barb groove is prepared to be formed. Then the slider is pushed forward from the outside to the inside, so that the surface of the paper plastic cup lid shrinks into the receiving groove of the inner mold as the contour of the molding strip is deformed, thereby forming an annular "barb groove" (equivalent to the "inner concave arc" part). When Taiwan Patent TW I430923 and China Patent CNZL200910157668.6 are implemented, the operation and maintenance of the entire set of sliders are relatively complicated, resulting in high manufacturing costs.

[0009] In addition, there are also patents that first shape the "inner concave arc" part (named "barb groove", with the same function), and then process the "outer covering edge" part, such as Taiwan TW I542755 and China CNZL201410151021.3 "Molded cup lid outer covering edge manufacturing method and finished product" patents. It uses a set of sliders on the outer mold to advance to the outer surface of the prepared outer covering edge and wait, and then a laterally movable forming mold is set in the middle of an inner mold. The forming mold advances to squeeze the inner surface of the prepared outer covering edge on the paper plastic cup lid from the inside to the outside, so as to deform a ring-shaped "outer covering edge". However, when implementing Taiwan TW I542755 and China CN ZL201410151021.3, it is still necessary to prepare a device with a whole set of sliders, which is also complicated in operation and maintenance, making it difficult to significantly reduce the manufacturing cost.

[0010] The above problems obviously need to be improved. [Summary of the invention]

[0011] The purpose of the present invention is: 1. To provide a manufacturing mold with a relatively simple structure composition in view of the importance of processing and forming the "inner concave arc" on the paper plastic cup cover. 2. To provide a manufacturing method that can be easily achieved in view of the importance of processing and forming the "inner concave arc" on the paper plastic cup cover. By using the above manufacturing mold and according to the above manufacturing method, the finished paper plastic cup cover can be quickly processed.

[0012] In order to achieve the above-mentioned purpose, the present invention specially creates a manufacturing mold for forming an inner concave arc on a paper-plastic cup cover, which is composed of an upper mold part and a lower mold part. The bottom surface of the upper mold part is inwardly concave to form an accommodation space, and a semi-groove of a ring is provided on the ring wall near the bottom surface for accommodating a ring of a rubber ring, which is a flexible elastic body; the lower mold part is composed of an inner mold body, an intermediate mold body and an outer mold body, wherein the inner mold body has a top surface, and the periphery is drooped in an arc to form an upper surrounding wall, and the bottom edge of the upper surrounding wall The mold body is expanded outward to form a tip, and then the mold body is beveled downward and inward for a distance to form an inner assembly bevel wall, and then the inner assembly bevel wall is vertically erected downward to form an inner assembly vertical wall; a large through hole is opened in the center of the middle mold body from top to bottom, and the surrounding is a first middle assembly vertical wall, and then the first middle assembly vertical wall is beveled upward and outward for a distance to form a middle assembly bevel wall, the inner diameter of the first middle assembly vertical wall corresponds to the outer diameter of the above-mentioned inner assembly vertical wall, and the inclination and diameter of the middle assembly bevel wall are relative to the inclination and diameter of the above-mentioned inner assembly bevel wall Therefore, when the inner mold body is filled into the large through hole of the middle mold body from top to bottom, the inner assembly inclined wall stops against the middle assembly inclined wall. During the process, the inner assembly vertical wall is in close contact with the first middle assembly vertical wall. After completion, the top of the middle assembly inclined wall of the middle mold body is aligned with the tip of the inner mold body, and the top of the middle assembly inclined wall extends outward for a short section and then concave downward and inward to form an arc block, so that the tip extends adjacent to the arc block; the innermost bottom end of the arc block forms a most concave point, and then extends an inclined abutment surface obliquely outward and downward. Then it is drooped downward to form a second middle assembly wall; a large through hole is opened in the center of the outer mold body from top to bottom, and an outer assembly wall is formed around it. The inner diameter of the outer assembly wall corresponds to the outer diameter of the second middle assembly wall. Therefore, when the intermediate mold body is filled into the large through hole of the outer mold body from top to bottom, the second middle assembly wall is tightly attached to the outer assembly wall; the outer assembly wall is slightly concave near the top to form a receiving micro groove, and then the top surface becomes a top abutment surface, and the receiving micro groove is located at the lowest end of the above-mentioned inclined abutment surface.

[0013] The present invention also claims a method for manufacturing a paper-plastic cup cover with an inner concave arc formed thereon, comprising a paper-plastic cup cover that has not yet formed an inner concave arc and a manufacturing mold, wherein the paper-plastic cup cover that has not yet formed an inner concave arc has a top surface, the periphery of the top surface droops to form an upper surrounding wall, the bottom edge of the upper surrounding wall expands outward and droops in a circular arc and is slightly concave inward to form an outer covering edge, the outer edge of the outer covering edge droops downward to form a vertical wall and then deviates outward to form a lifting wall; the manufacturing mold is composed of an upper mold part and a lower mold part, the bottom surface of the upper mold part is inwardly concave to form an accommodating space, and a semi-groove of a ring is formed on the ring wall near the bottom surface for accommodating a ring of a rubber ring, The rubber ring is a flexible elastic body; the lower mold part is composed of an inner mold body, an intermediate mold body and an outer mold body, wherein the inner mold body has a top surface, the periphery of which sags downward in an arc to form an upper surrounding wall, the bottom edge of the upper surrounding wall expands outward to form a tip, and then the mold body is beveled downward and inward for a distance to form an inner assembly inclined wall, and then the inner assembly inclined wall is drooped downward to form an inner assembly vertical wall; a large through hole is opened in the center of the intermediate mold body from top to bottom, and the surrounding is a first middle assembly vertical wall, and then the first middle assembly vertical wall is beveled upward and outward for a distance to form a middle assembly inclined wall, and the inner diameter of the first middle assembly vertical wall is the same as the inner assembly vertical wall. The outer diameter of the middle assembly oblique wall corresponds to that of the inner assembly oblique wall, and the inclination and diameter of the middle assembly oblique wall correspond to those of the inner assembly oblique wall. Therefore, when the inner mold body is filled from the large through hole of the middle mold body from top to bottom, the inner assembly oblique wall stops against the middle assembly oblique wall. During the process, the inner assembly vertical wall is in close contact with the first middle assembly vertical wall. After completion, the top of the middle assembly oblique wall of the middle mold body is aligned with the tip of the inner mold body, and the top of the middle assembly oblique wall extends outward for a short section and then concave downward and inward to form an arc block, so that the tip extends adjacent to the arc block. The innermost bottom end of the arc block forms a most concave point, and then extends an oblique abutment surface obliquely outward and downward. Then it is drooped downward to form a second middle assembly wall; a large through hole is opened in the center of the outer mold body from top to bottom, and an outer assembly wall is formed around it. The inner diameter of the outer assembly wall corresponds to the outer diameter of the second middle assembly wall. Therefore, when the intermediate mold body is filled from the large through hole of the outer mold body from top to bottom, the second middle assembly wall is closely attached to the outer assembly wall; the outer assembly wall is slightly concave near the top to form a receiving micro groove, and then the top surface becomes a top abutment surface, and the receiving micro groove is located at the lowest end of the above-mentioned inclined abutment surface; the manufacturing method uses the manufacturing device to perform the following steps on the paper-plastic cup cover that has not yet formed an inner concave arc:

[0014] (1) Move the upper mold part above the lower mold part, the upper mold part and the lower mold part are separated by a distance, and then a paper-plastic cup cover that has not yet formed an inner concave arc is horizontally placed in the interval, and then the paper-plastic cup cover that has not yet formed an inner concave arc is covered downward on the lower mold part;

[0015] (2) Then, the upper mold part is lowered to approach the paper-plastic cup lid that has not yet formed an inner concave arc. First, the rubber ring in the upper mold part will first abut against the outer covering edge attached to the arc block. Then, when the upper mold part continues to descend, the rubber ring will deform and pass over the arc block and the outer covering edge and descend; then, the rubber ring abuts against the vertical wall connected between the outer covering edge and the lifting wall, and immediately pushes the vertical wall to produce an inner concave arc, and further makes the upper mold part and the lower mold part relatively close, so that under the combined action of the lateral oblique pressure of the semi-groove and the upward pressing of the top abutting surface, the rubber ring is deformed inward to push the inner concave arc to be fixed;

[0016] (3) The upper mold part is raised, during which the rubber ring will deform and pass through the arc block and the outer edge, rise and then recover, and then the upper mold part rises to a predetermined height and stays;

[0017] (4) Remove the paper-plastic cup cover with the formed inner concave arc from the lower mold part.

[0018] The present invention also claims a paper-plastic cup cover product, which is a paper-plastic cup cover manufactured by using the above-mentioned manufacturing device and implementing the above-mentioned manufacturing method, and a concave arc portion is formed on the paper-plastic cup cover.

[0019] The advantages and beneficial effects of the present invention are as follows: the present invention provides a manufacturing mold with a relatively simple structure composition in view of the importance of processing and forming the "inner concave arc" on the paper plastic cup cover. In view of the importance of processing and forming the "inner concave arc" on the paper plastic cup cover, a manufacturing method that can be easily achieved is provided. And the above-mentioned manufacturing mold is used, and according to the above-mentioned manufacturing method, the finished paper plastic cup cover is quickly processed.

Brief Description of the Drawings

[0020] Figure 1 Shown is a three-dimensional view of a conventional simple paper-plastic cup cover.

[0021] Figure 2 Shown is a side view of a conventional simple paper-plastic cup cover.

[0022] Figure 3 Shown is a cross-sectional view of a conventional simple paper-plastic cup cover.

[0023] Figure 4 Shown is a three-dimensional view of a conventional exquisite paper-plastic cup cover.

[0024] Figure 5 Shown is a side view of a conventional exquisite paper-plastic cup cover.

[0025] Figure 6 The figure shows a single side cross-sectional view of a conventional paper-plastic cup cover before an inner concave arc is formed.

[0026] Figure 7 Shown is a single side cross-sectional view of a conventional paper-plastic cup cover.

[0027] Figure 8 The figure shows a single side cross-sectional view of a conventional paper-plastic cup cover and a cup body being relatively covered (used).

[0028] Fig. 9 Shown is a large-scale three-dimensional exploded view of the manufacturing mold for forming the inner concave arc in the present invention.

[0029] Fig.10 Shown is a detailed three-dimensional exploded view of the manufacturing mold for forming the inner concave arc in the present invention.

[0030] Fig.11 Shown is a mostly anatomical view of a manufacturing mold for forming an inner concave arc in the present invention.

[0031] Figures 12 to 16 Shown is a continuous action diagram of the manufacturing method of the present invention for forming an inner concave arc on a paper-plastic cup cover using the manufacturing mold.

[0032] The numbers in the figure are explained as follows:

[0033] Paper plastic cup cover 1 top surface 11 drinking mouth 111

[0034] Upper wall 12 outer edge 13 inner concave arc 14

[0035] Lifting wall 15 Upper die portion 6 Half groove 61

[0036] Rubber ring 62 Bottom surface 63 Lower mold part 7

[0037] Inner mold body 71 Top surface 711 Upper surrounding wall 712

[0038] Tip 713 Internally assembled inclined wall 714 Internally assembled vertical wall 715

[0039] The middle mold body 72 arc block 723 is assembled with the inclined wall 724

[0040] First middle assembly wall 725 most concave point 726 inclined surface 727

[0041] Second middle assembly wall 728 outer mold body 73 top abutment surface 736

[0042] Step surface 737 External assembly wall 738 Accepting micro groove 739 [Specific implementation method]

[0043] In order to achieve the purpose of quickly processing and manufacturing paper-plastic cup covers, the present invention develops and creates a manufacturing mold to meet the needs of processing and forming an "inner concave arc" on the paper-plastic cup cover. Figures 9-11As shown, the manufacturing mold created by the present invention is composed of an upper mold part 6 and a lower mold part 7, wherein the bottom surface of the upper mold part 6 is inwardly recessed to form an accommodating space, and a semi-groove 61 of a ring is formed on the ring wall near the bottom surface, which can be used to accommodate a ring of rubber ring 62. After the semi-groove 61 is formed near the bottom surface of the ring wall, the remaining surface is the bottom surface 63 of the ring; the rubber ring 62 is a flexible elastic body, but the elasticity is relatively low, that is, the rubber ring 62 can be pressed and slightly deformed, but the deformation is not high, and it will immediately return to its original shape after the pressing is removed; because the rubber ring 62 is accommodated in the semi-groove 61, the existence of the rubber ring 62 can be easily seen from the bottom surface of the upper mold part 6, and the rubber ring 62 moves synchronously with the upper mold part 6.

[0044] The lower mold part 7 is composed of an inner mold body 71, a middle mold body 72 and an outer mold body 73, wherein the inner mold body 71 has a top surface 711, and the periphery droops in an arc to form an upper surrounding wall 712, and the bottom edge of the upper surrounding wall 712 expands outward to form a tip 713, and then the mold body is beveled downward and inward for a distance to form an inner assembly inclined wall 714, and then the inner assembly inclined wall 714 is drooped downward to form an inner assembly vertical wall 715. The middle mold body 72 has a large through hole in the center from top to bottom, and is surrounded by a first middle assembly wall 725. Then, the first middle assembly wall 725 is beveled upward and outward for a distance to form a middle assembly inclined wall 724. The inner diameter of the first middle assembly wall 725 corresponds to the outer diameter of the inner assembly wall 715. The inclination and diameter of the middle assembly inclined wall 724 correspond to the inclination and diameter of the inner assembly inclined wall 714. Therefore, when the inner mold body 71 is filled from the large through hole of the middle mold body 72 from top to bottom, it will stop when the inner assembly inclined wall 714 is against the middle assembly inclined wall 724, and during the process, the inner assembly wall 715 and the first middle assembly wall 725 are just in close contact (such as Fig.11 After the assembly is completed, the top of the middle assembly inclined wall 724 of the middle mold body 72 is aligned with the tip 713 of the inner mold body 71, and the top of the middle assembly inclined wall 724 extends outward for a short section and then concave downward and inward to form an arc block 723, so that the tip 713 is adjacent to the arc block 723 and extends past each other naturally; the innermost bottom end of the arc block 723 forms a most concave point 726, and then extends obliquely outward and downward to form an oblique abutment surface 727, and then hangs down to form a second middle assembly vertical wall 728.

[0045] The outer mold body 73 has a large through hole in the center from top to bottom, and is surrounded by an outer assembly wall 738. The inner diameter of the outer assembly wall 738 corresponds to the outer diameter of the second middle assembly wall 728. Therefore, when the intermediate mold body 72 is inserted from the large through hole of the outer mold body 73 from top to bottom, the second middle assembly wall 728 fits tightly with the outer assembly wall 738 (such as Fig.11The outer assembly wall 738 is slightly concave near the top to form a receiving micro groove 739, and then the top surface becomes a top abutment surface 736, and then it lowers outward to become a step surface 737; after the assembly is completed, the receiving micro groove 739 is exactly located at the lowest end of the above-mentioned inclined abutment surface 727.

[0046] After the inner mold body 71, the middle mold body 72 and the outer mold body 73 are firmly assembled, they become the lower mold part 7, which can then be firmly placed on a platform and used together with the upper mold part 6 to form a ring-shaped inner concave arc 14 on the paper plastic cup cover 1, thereby deriving a manufacturing method. Figures 12 to 16 As shown, the manufacturing method claimed by the present invention is through the following steps:

[0047] 1. As Fig.12 As shown, first, the upper mold part 6 is driven up by an external power (such as a power cylinder, not shown in the figure) to be spaced apart from the lower mold part 7 by a distance, and then a paper-plastic cup cover 1 that has not yet been formed with an inner concave arc 14 is horizontally placed in the gap, and then Fig.13 As shown, the paper plastic cup cover 1 is covered downward on the lower mold part 7. It must be mentioned here that due to manufacturing requirements, the dimensions of several parts on the lower mold part 7 must correspond to the dimensions of the corresponding parts on the paper plastic cup cover 1, so that Fig.13 For example, the parts with corresponding sizes are as follows:

[0048] (1) There is a corresponding size relationship between the top surface 11 and the top surface 711;

[0049] (2) There is a corresponding size relationship between the upper surrounding wall 12 and the upper surrounding wall 712;

[0050] (3) There is a dimensional correspondence between the outer edge 13 and the tip 713 and the arc block 723;

[0051] (4) There is a dimensional correspondence between the lifting wall 15 and the inclined surface 727 and the receiving micro groove 739;

[0052] Therefore, when the paper-plastic cup cover 1 is downwardly covered on the lower mold part 7, Fig.13 It can be seen that the top surface 11 of the paper plastic cup cover 1 is attached to the top surface 711 of the lower mold part 7, and the upper surrounding wall 12 of the paper plastic cup cover 1 is attached to the upper surrounding wall 712 of the lower mold part 7, and the outer covering edge 13 of the paper plastic cup cover 1 is attached to the tip 713 and the arc block 723 of the lower mold part 7, and the lifting wall 15 of the paper plastic cup cover 1 is attached to the inclined abutment surface 727 of the lower mold part 7, and the bottom end of the lifting wall 15 is just inserted into the receiving micro groove 739 to stay. Fig.13It can also be seen that, because the paper plastic cup cover 1 has not yet formed an inner concave arc 14 , a vertical wall is connected from the outer covering edge 13 to the lifting wall 15 on the paper plastic cup cover 1 , that is, there is a space between the vertical wall and the most concave point 726 .

[0053] 2. If Fig.14 As shown, the upper mold part 6 is then driven by an external force to descend and approach the lower mold part 7, which is actually close to the paper plastic cup cover 1. First, the rubber ring 62 in the upper mold part 6 will first hit the outer edge 13 attached to the arc block 723, and then the upper mold part 6 continues to descend. During the process, the outer edge 13 is supported by the arc block 723 to form a stronger state. The rubber ring 62 is a flexible elastic body. Therefore, when the upper mold part 6 continues to descend, the rubber ring 62 will deform itself to pass over the arc block 723 and the outer edge 13 and descend, and then recover; then the rubber ring 62 quickly hits the vertical wall connected to the outer edge 13 and the lifting wall 15 mentioned above, because In comparison, the strength of the vertical wall is much lower than that of the rubber ring 62, so the rubber ring 62 immediately pushes the vertical wall to start to produce the part where the concave arc 14 begins. At this time, the upper mold part 6 and the lower mold part 7 can be relatively closer. For example, the upper mold part 6 can be driven to descend slightly, or the lower mold part 7 can be driven to rise slightly, or the upper mold part 6 can be lowered while the lower mold part 7 rises. Under the combined effect of the lateral oblique pressure of the semi-recess 61 and the upward pressure of the top abutment surface 736, the rubber ring 62 can be slightly deformed inward to push the concave arc 14 to be more formed. In the process, the upper mold part 6 is allowed to stay for a short time when it descends to a predetermined height to ensure that the concave arc 14 is actually formed. Because the paper-plastic cup cover 1 is made of a mixture of pulp and / or plant fiber materials and is manufactured by mold slurry suction shaping and hot pressing shaping technology, it is plastic. Therefore, after the rubber ring 62 is deformed and pushed inward for a period of time, the inner concave arc 14 will be formed and fixed.

[0054] 3. Such as Fig.15 As shown, the upper mold part 6 is driven to rise by an external power. During the process, the rubber ring 62 will still deform itself to pass over the arc block 723 and the outer covering edge 13 and rise, and then recover. Then the upper mold part 6 rises to a predetermined height and stays there, waiting for the next stroke.

[0055] 4. Such as Fig.16As shown, the paper plastic cup cover 1 is removed from the lower mold part 7, and a manufacturing process is completed. As for the process of removing the paper plastic cup cover 1, because the structure of the inner concave arc 14 has been formed on the paper plastic cup cover 1, when the paper plastic cup cover 1 is removed upward, whether it is removed vertically or obliquely, the inner concave arc 14 will be blocked by the arc block 723, but because the paper plastic cup cover 1 is deflectable, it can pass the arc block 723 by slightly tilting or bending, so as to facilitate removal, and the paper plastic cup cover 1 can be restored immediately. As for the action of removing the paper plastic cup cover 1 from the lower mold part 7, it can be removed directly manually or automatically by a robotic arm.

[0056] According to the above disclosure, the upper mold part 6 and the lower mold part 7 are the manufacturing mold created by the present invention. Since no one has disclosed or used the manufacturing mold with the same structure, it is novel and creative. Then, the manufacturing mold must be used to quickly process and form the structure of the inner concave arc 14 on the paper-plastic cup cover 1. Therefore, the manufacturing method disclosed by the present invention is also novel and creative. Therefore, the paper-plastic cup cover 1 processed by using the manufacturing mold and the manufacturing method is also novel and creative.

Claims

1. A manufacturing mold for forming an inner concave arc on a paper-plastic cup cover, characterized in that: The invention is composed of an upper mold part and a lower mold part. The bottom surface of the upper mold part is inwardly concave to form a receiving space. A semi-groove of a ring is provided on the ring wall near the bottom surface to accommodate a rubber ring of a ring. The rubber ring is a flexible elastic body. The lower mold part is composed of an inner mold body, an intermediate mold body and an outer mold body. The inner mold body has a top surface, and the periphery is drooped in an arc to form an upper surrounding wall. The bottom edge of the upper surrounding wall is expanded outward to form a tip. Then the mold body is beveled downward and inward to form a distance shape. The inner assembly inclined wall is formed, and then the inner assembly inclined wall is vertically erected downward to form an inner assembly vertical wall; a large through hole is opened in the center of the middle mold body from top to bottom, and the surrounding is a first middle assembly vertical wall, and then the first middle assembly vertical wall is inclined upward and outward for a distance to form a middle assembly inclined wall, the inner diameter of the first middle assembly vertical wall corresponds to the outer diameter of the above-mentioned inner assembly vertical wall, and the inclination and diameter of the middle assembly inclined wall correspond to the inclination and diameter of the above-mentioned inner assembly inclined wall, so the inner mold body is formed from the large hole of the middle mold body. When the perforation is filled from top to bottom, the inner assembly inclined wall abuts against the middle assembly inclined wall and stops. During the process, the inner assembly vertical wall is in close contact with the first middle assembly vertical wall. After completion, the top of the middle assembly inclined wall of the intermediate mold body is aligned with the tip of the inner mold body. The top of the middle assembly inclined wall extends outward for a short section and then concave downward and inward to form an arc block, so that the tip extends adjacent to the arc block. The innermost bottom end of the arc block forms a most concave point, and then extends obliquely outward and downward to form an oblique abutment surface, and then hangs down to form a second middle assembly wall; a large through hole is opened in the center of the outer mold body from top to bottom, and an outer assembly wall is formed around it. The inner diameter of the outer assembly wall corresponds to the outer diameter of the second middle assembly wall, so when the intermediate mold body is filled from top to bottom through the large through hole of the outer mold body, the second middle assembly wall is tightly attached to the outer assembly wall; the outer assembly wall is slightly concave near the top to form a receiving micro groove, and then the top surface becomes a top abutment surface, and the receiving micro groove is located at the lowest end of the above-mentioned inclined abutment surface.

2. A method for manufacturing a concave arc formed on a paper-plastic cup cover, characterized in that: The invention comprises a paper-plastic cup cover which has not formed an inner concave arc and a manufacturing mold. The paper-plastic cup cover which has not formed an inner concave arc has a top surface, the periphery of the top surface droops to form an upper surrounding wall, the bottom edge of the upper surrounding wall expands outward and droops in a circular arc and is slightly concave inward to form an outer covering edge, the outer edge of the outer covering edge droops downward to form a vertical wall and then deviates outward to form a lifting wall; The manufacturing mold is composed of an upper mold part and a lower mold part. The bottom surface of the upper mold part is inwardly concave to form a receiving space. A semi-groove of a ring is provided on the ring wall near the bottom surface for accommodating a rubber ring of a ring. The rubber ring is a flexible elastic body. The lower mold part is composed of an inner mold body, an intermediate mold body and an outer mold body. The inner mold body has a top surface, and the periphery is drooped in an arc to form an upper surrounding wall. The bottom edge of the upper surrounding wall is expanded outward to form a tip, and then the mold body is beveled downward and inward. The inner assembly inclined wall is formed by the inner assembly inclined wall, and then the inner assembly inclined wall is vertically erected downward to form an inner assembly vertical wall; a large through hole is opened in the center of the middle mold body from top to bottom, and the surrounding is a first middle assembly vertical wall, and then the first middle assembly vertical wall is inclined upward and outward to form a middle assembly inclined wall, the inner diameter of the first middle assembly vertical wall corresponds to the outer diameter of the above-mentioned inner assembly vertical wall, and the inclination and diameter of the middle assembly inclined wall correspond to the inclination and diameter of the above-mentioned inner assembly inclined wall, so the inner mold body is formed from the middle mold body. When the large through hole is filled from top to bottom, the inner assembly inclined wall abuts against the middle assembly inclined wall and stops. During the process, the inner assembly vertical wall is in close contact with the first middle assembly vertical wall. After completion, the top of the middle assembly inclined wall of the intermediate mold body is aligned with the tip of the inner mold body, and the top of the middle assembly inclined wall extends outward for a short section and then concave downward and inward to form an arc block, so that the tip and the arc block extend adjacently; the innermost bottom end of the arc block forms a most concave point, and then extends outward and downward obliquely to an oblique abutment surface, and then hangs down to form a vertical block. A second middle assembly wall is formed; a large through hole is opened in the center of the outer mold body from top to bottom, and an outer assembly wall is formed around it. The inner diameter of the outer assembly wall corresponds to the outer diameter of the second middle assembly wall. Therefore, when the middle mold body is filled into the large through hole of the outer mold body from top to bottom, the second middle assembly wall is closely attached to the outer assembly wall; the outer assembly wall is slightly concave near the top to form a receiving micro groove, and then the top surface becomes a top abutment surface, and the receiving micro groove is located at the lowest end of the above-mentioned inclined abutment surface; The manufacturing method uses the manufacturing mold to perform the following steps on the paper-plastic cup cover that has not yet formed an inner concave arc: (1) Move the upper mold part above the lower mold part, the upper mold part and the lower mold part are separated by a distance, and then a paper-plastic cup cover that has not yet formed an inner concave arc is horizontally placed in the interval, and then the paper-plastic cup cover that has not yet formed an inner concave arc is covered downward on the lower mold part; (2) Then, the upper mold part is lowered to approach the paper-plastic cup lid that has not yet formed an inner concave arc. The rubber ring in the upper mold part will firstly abut against the outer covering edge attached to the arc block. Then, when the upper mold part continues to descend, the rubber ring will deform and pass over the arc block and the outer covering edge and descend; then, the rubber ring abuts against the vertical wall connected between the outer covering edge and the lifting wall, and immediately pushes the vertical wall to produce an inner concave arc, and further makes the upper mold part and the lower mold part relatively close, so that under the combined action of the lateral oblique pressure of the semi-groove and the upward pressing of the top abutting surface, the rubber ring is deformed inward to push the inner concave arc to be fixed; (3) The upper mold part is raised, during which the rubber ring will deform and pass through the arc block and the outer edge, rise and then recover, and then the upper mold part rises to a predetermined height and stays; (4) Remove the paper-plastic cup cover with the formed concave arc from the lower mold.

3. A paper-plastic cup cover product, which is manufactured by the manufacturing mold of claim 1 and the manufacturing method of claim 2, characterized in that: The paper-plastic cup cover has a concave arc portion formed thereon.

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