Cup, cupping and blow mould

Abstract

The cup body is a plastic cup body, and the cup body is provided with a water sealing platform inside the cup body, which is used for sealing the inner cavity of the cup body in cooperation with the cup cover, so that the vacuum cup and the plastic cup can share the cup cover, the use versatility of the cup cover is improved, the number of molds for forming the cup cover is reduced, and the manufacturing cost of the cup cover is reduced.

Description

Technical Field

[0001] This disclosure belongs to the field of drinking water appliance technology, and particularly relates to a cup body, a cup, and a blow molding mold. Background Technology

[0002] Plastic cups and insulated cups are two common types of drinking cups on the market. Both consist of a cup body and a lid. The difference is that plastic cups usually have the lid connected to the cup body at the mouth via external threads, while insulated cups usually have the lid connected to the cup body at the mouth via internal threads. Because the lids of these two types of cups are different, different lid molds are required to form them. In other words, the inability to use universal molds results in higher manufacturing costs for the lids. Utility Model Content

[0003] The main objective of this disclosure is to provide a cup body, a cup, and a blow molding mold that can improve the versatility of the cup lid and reduce the manufacturing cost of the cup lid.

[0004] To achieve the above objectives, this disclosure provides the following technical solution: One aspect of this disclosure provides a cup body made of plastic. The cup body includes a body segment and a lid connecting portion connected to the body segment. A sealing platform is provided at the connection between the body segment and the lid connecting portion. The sealing platform protrudes from the inner wall of the lid connecting portion into the inner cavity of the cup body and extends continuously along the circumference of the cup body. The cup body provided in this embodiment is a plastic cup body, and the sealing platform inside the cup body is used to cooperate with the lid to seal the inner cavity of the cup body. This allows both insulated cups and plastic cups to share a lid, improving the versatility of the lid and reducing the number of molds used to form the lid, thereby reducing the manufacturing cost of the lid.

[0005] According to an exemplary embodiment of this disclosure, the inner wall of the lid connecting portion is provided with an internal thread, and the water sealing platform is disposed on the side of the internal thread facing the bottom of the cup body. The lid connecting portion of the cup body provided in this disclosure is provided with an internal thread so as to be compatible with the lid of a thermos.

[0006] According to an exemplary embodiment of this disclosure, at a position corresponding to the water-sealing platform, the outer peripheral wall of the cup body is recessed to form an annular groove, the annular groove extending continuously along the circumference of the cup body. The cup body also includes a decorative ring disposed within the annular groove. In this embodiment, by disposing of the decorative ring within the annular groove, external impurities are prevented from entering the annular groove, thus facilitating the maintenance of the cup body's cleanliness.

[0007] According to an exemplary embodiment of this disclosure, the cup body is made of polypropylene, polycarbonate, or polyethylene terephthalate.

[0008] According to another aspect of this disclosure, a cup is provided, comprising a lid and a cup body as described above, wherein the lid can be engaged with a connecting portion of the lid. Since the cup body is made of plastic and a sealing plate is provided inside the cup body for sealing the inner cavity of the cup body in conjunction with the lid, both insulated cups and plastic cups can share a lid, thereby improving the versatility of the lid.

[0009] According to an exemplary embodiment of this disclosure, a sealing ring is provided at the bottom of the cup lid. When the cup lid is engaged with the cup lid connection portion, the sealing ring can seal with the water sealing platform, thereby improving the sealing performance of the cup.

[0010] According to another aspect of this disclosure, a blow molding die is provided for forming a cup body as described above. The blow molding die has a cavity, including a cup body cavity corresponding to the cup body segment and a mouth cavity corresponding to the lid connection portion. A flange is provided at the connection between the cup body cavity and the mouth cavity. The flange protrudes from the cavity wall into the cavity and extends continuously along the circumference of the blow molding die. The flange is used to form the sealing platform on the cup body during the blow molding process. The blow molding die provided in this embodiment has a cavity and can be used to process bottle preforms using a blow molding process to produce plastic cups that can share lids with insulated cups, improving the versatility of the lid.

[0011] According to an exemplary embodiment of this disclosure, the flange has a radially inner sidewall, a first connecting wall, and a second connecting wall. The first connecting wall connects the radially inner sidewall to the cavity wall of the cup body mold cavity, and the second connecting wall connects the radially inner sidewall to the cavity wall of the mouth mold cavity. The first connecting wall and the second connecting wall extend obliquely relative to the radially inner sidewall. This configuration allows the blown cup body to be easily demolded.

[0012] According to an exemplary embodiment of this disclosure, a first interior angle is formed between the radially inner sidewall and the first connecting wall, a second interior angle is formed between the radially inner sidewall and the second connecting wall, a third interior angle is formed between the first connecting wall and the cavity wall of the cup body mold cavity, and a fourth interior angle is formed between the second connecting wall and the cavity wall of the mouth mold cavity. The first, second, third, and fourth interior angles are all obtuse angles. This arrangement facilitates smooth demolding of the cup body formed within the blow molding mold.

[0013] According to an exemplary embodiment of this disclosure, rounded corners are provided at the first, second, third, and fourth interior corners. This arrangement allows the preform to flow uniformly at the rounded corners, resulting in a consistent wall thickness for the cup and effectively ensuring the quality of the cup.

[0014] According to an exemplary embodiment of this disclosure, the included angle α between the first connecting wall and the second connecting wall satisfies 15°≤α≤25°. This arrangement facilitates the smooth demolding of the cup body formed in the blow molding mold. Attached Figure Description

[0015] The above and / or other objects and advantages of this disclosure will become clearer from the following description of embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 A structural diagram of a cup provided for an exemplary embodiment of this disclosure.

[0016] Figure 2 for Figure 1 A magnified view of a portion of the cup.

[0017] Figure 3 for Figure 2 The exploded structure diagram of the cup in the picture.

[0018] Figure 4 A structural diagram of a blow molding die provided for an exemplary embodiment of this disclosure.

[0019] Figure 5 for Figure 4 A longitudinal sectional view of the blow molding die.

[0020] Figure 6 for Figure 5 A magnified view of the structure indicated by circle I in the diagram.

[0021] Figure 7 for Figure 4 A diagram showing the usage status of blow molding dies.

[0022] Explanation of reference numerals in the attached figures: 100. Cup body; 101. Cup segment; 102. Cup lid connection part; 103. Water sealing platform; 104. Annular groove; 105. Decorative ring; 200. Cup lid; 201. Lid body; 202. Flip cover; 203. Pivot joint; 204. Water outlet channel; 205. On / off switch; 206. Sealing ring; 300. Blow molding mold; 301. Mold body; 302. Flange; 3011, First half mold; 3012, Second half mold; 3013, bottom core; 3021, radial inner wall; 3022, First connecting wall; 3023, Second connecting wall; 400. Preform; 500. Preform fixture; 600. Tension bar. Detailed Implementation

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be construed that the embodiments of this disclosure are limited to those described herein. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0024] To reduce the number of molds used in manufacturing cup lids, a design scheme using a universal cup lid mold is proposed. One design scheme involves keeping the existing plastic cup lid design unchanged and manufacturing the thermos cup lid using a plastic cup lid mold; that is, designing it as an internally threaded lid. Correspondingly, the thread structure of the thermos cup rim needs to be changed, i.e., the thermos cup rim is set to an externally threaded structure to mate with the internal thread of the lid. However, the inventors found that this design reduces the heat retention performance of the thermos cup. Another design scheme involves keeping the thermos cup lid design unchanged and setting the plastic cup lid to an externally threaded structure, allowing it to be manufactured using a thermos cup lid mold. This design scheme ensures the heat retention performance of the thermos cup and reduces the manufacturing cost of the plastic cup. With the second design scheme, the plastic cup body needs corresponding modifications. The technical solution of this application is based on this design concept. The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figure 1 and Figure 3 According to one aspect of this disclosure, a cup is provided, which includes a cup body 100 and a cup lid 200. In this embodiment, the cup body 100 is a plastic cup body made of plastic, for example, but not limited to, the cup body 100 may be made of polypropylene (PP), polycarbonate (PC) or polyethylene terephthalate (PET) material, but is not limited thereto.

[0026] As an example, the cup body 100 can be made from a preform 400 using a blow molding process. Specifically, the preform 400, heated to a predetermined temperature, can be placed in the cavity of a blow molding mold 300 and blown to form the cup body 100. In this embodiment, blow molding is a process that involves heating a plastic raw material to a molten state, then blowing it into a mold, and cooling it to obtain an article of the desired shape. It is a known technology and will not be described in detail here.

[0027] The cup body 100 may include a cup body segment 101 and a lid connecting portion 102 connected to the cup body segment 101. The cup body segment 101 has an inner cavity that can communicate with the outside through the lid connecting portion 102. The inner cavity can be used to store liquid, such as, but not limited to, drinking water. The inner sidewall of the lid connecting portion 102 is provided with an internal thread, and correspondingly, the outer peripheral wall of the lid 200 is provided with an external thread, so that the lid 200 can be threadedly connected to the lid connecting portion 102. The cup body 100 configured in this way can be adapted to the lid of a thermos, that is, it allows plastic cups to share the same lid as thermos cups, improving the versatility of the lid and reducing the number of molds used to manufacture the lid, thereby reducing the manufacturing cost of the lid.

[0028] In this embodiment, the cup body 100 can be a plastic part, and an internal thread is provided on the inner side wall of the cup lid connecting part 102 of the cup body 100. That is, the cup body 100 provided in this disclosure is a plastic cup body with an internal thread in the cup lid connecting part 102, which makes it possible for the plastic cup body to be adapted to the cup lid of the thermos, effectively improving the versatility of the cup lid, reducing the number of molds used to form the cup lid, and thus reducing the manufacturing cost of the cup lid.

[0029] To prevent leakage, the cup body 100 also includes a sealing platform 103 for sealing with the lid 200. Specifically, the sealing platform 103 is located at the connection between the cup body 101 and the lid connecting part 102. The sealing platform 103 protrudes from the inner wall of the lid connecting part 102 into the inner cavity of the cup body 100 and extends continuously along the circumference of the cup body 100. Thus, by providing the sealing platform 103, it becomes possible for the plastic cup body to fit the lid of the insulated cup.

[0030] In this embodiment, the sealing fit between the sealing platform 103 and the cup lid 200 can be a direct contact seal. Specifically, the cup lid 200 can directly contact the sealing platform 103 to be directly pressed onto the sealing platform 103, thereby forming a direct contact seal between the cup lid 200 and the sealing platform 103. For example, but not limited to, the cup lid 200 can undergo elastic deformation when connected to the cup lid connecting part 102 to generate sufficient contact pressure, thereby achieving a direct contact seal fit with the sealing platform 103.

[0031] In addition, the sealing fit between the cup lid 200 and the water sealing platform 103 can also be achieved using a sealing ring. Specifically, a sealing ring 206 is provided at the bottom of the cup lid 200. When the cup lid 200 is engaged with the cup lid connecting part 102, the sealing ring 206 is sealed between the water sealing platform 103 and the cup lid 200, that is, the sealing ring 206 can seal with the water sealing platform 103, thereby preventing drinking water from leaking through the gap at the connection between the cup lid 200 and the cup lid connecting part 102, and improving the reliability of the cup.

[0032] Reference Figure 2 As an example, the sealing ring 206 may make sealing contact with the upper and side surfaces of the water sealing platform 103 to form a sealing fit, but is not limited thereto.

[0033] In this embodiment, the sealing platform 103 is located on the side with the internal thread facing the bottom of the cup body 100. That is, when the opening of the cup body 100 is set vertically upward, the sealing platform 103 is located below the internal thread to avoid affecting the threaded connection between the cup lid 200 and the cup lid connecting part 102, but this is not a limitation.

[0034] Reference Figure 3 In this embodiment, at the position corresponding to the sealing platform 103, the outer peripheral wall of the cup body 100 is recessed to form an annular groove 104. The annular groove 104 extends continuously along the circumference of the cup body 100. The cup body 100 may also include a decorative ring 105, which is disposed within the annular groove 104. On the one hand, by disposing of the decorative ring 105 within the annular groove 104, external impurities are prevented from entering the annular groove 104, thus helping to keep the cup body 100 clean. On the other hand, the outer peripheral wall of the decorative ring 105 is flush with the outer peripheral wall of the cup body 100, thereby improving the aesthetics of the cup.

[0035] As an example, the decorative ring 105 is detachably disposed within the annular groove 104, and multiple decorative rings 105 can be configured, with multiple decorative rings 105 having different colors, allowing users to select different decorative rings 105 according to their preferences.

[0036] Continue to refer to Figure 2 The cup lid 200 may include a lid body 201, wherein the lid body 201 is provided with an external thread, which matches the internal thread at the cup lid connecting part 102 of the cup body 100, so that the lid body 201 can be threadedly connected to the cup lid connecting part 102. A sealing ring 206 is provided at the bottom end of the lid body 201. When the cup lid 200 is engaged with the cup lid connecting part 102, the sealing ring 206 can press against the sealing platform 103 to achieve a seal for the cup, but this is not a limitation. As an example, the bottom end of the lid body 201 is provided with a groove, and the sealing ring 206 is engaged in the groove, but this is not a limitation.

[0037] In this embodiment, the lid body 201 is provided with a water outlet channel 204 that penetrates the top and bottom surfaces of the lid body 201. The inner cavity of the cup body 100 can communicate with the outside through the water outlet channel 204. When the inner cavity of the cup body 100 contains drinking water, the user can drink the drinking water in the cup body 100 through the water outlet channel 204, but this is not a limitation.

[0038] In this embodiment, the cup lid 200 may also include a flip cover 202, which is rotatably connected to one side of the lid body 201 via a pivot 203, so that the flip cover 202 can be flipped relative to the lid body 201 to open or close the water outlet channel 204, but is not limited thereto.

[0039] To improve the ease of use of the cup lid 200, the cup lid 200 may also include an on / off switch 205. Under normal circumstances, the flip-top 202 can be closed on the lid body 201 to close the water outlet channel 204, preventing the drinking water inside the cup body 100 from flowing out. Operating the on / off switch 205 can drive the flip-top 202 to open relative to the lid body 201, thereby opening the water outlet channel 204, allowing the drinking water inside the cup body 100 to be consumed through the water outlet channel 204. As an example, the on / off switch 205 is located on the side of the cup lid 200 opposite to the pivot axis 203, but this is not a limitation. The on / off switch 205 provided in this embodiment is a known structure in the prior art and will not be described in detail here.

[0040] This embodiment illustrates an example where the lid body 201 has a water outlet channel 204, and the opening and closing of the water outlet channel 204 is controlled by rotating the flip cover 202 relative to the lid body 201. However, this is not a limitation. Depending on the needs, the lid body 201 can also be configured without a water outlet channel. By connecting the lid body 201 to the cup lid connecting part 102 of the cup body 100, the outflow of drinking water from the cup body 100 can be prevented. When it is necessary to drink the drinking water from the cup body 100, the lid body 201 can be removed from the cup lid connecting part 102.

[0041] Reference Figures 4 to 7 In another aspect of this disclosure, a blow molding die is provided for blowing the aforementioned cup body 100. The blow molding die 300 includes a die body 301 and a flange 302. The die body 301 has a mold cavity for blowing a preform 400 into the cup body 100. The mold cavity includes a cup body mold cavity and a mouth mold cavity. The cup body section 101 is blow-formed within the cup body mold cavity, and the mouth mold cavity accommodates a lid connecting portion 102. Before blowing the preform 400, this mouth mold cavity accommodates the mouth of the preform 400 (the mouth of the preform 400 and the lid connecting portion 102 are the same and will be described below). A flange 302 is provided at the connection between the cup body mold cavity and the mouth mold cavity. The flange 302 protrudes from the cavity wall into the mold cavity and extends continuously along the circumferential direction of the blow molding die 300. The flange 302 is used to form a sealing platform 103 on the cup body 100 during the blow molding process.

[0042] According to an exemplary embodiment of this disclosure, the preform 400 can be preformed. The opening of the preform 400 is the same as the lid connection portion 102 of the cup body 100, that is, the opening of the preform 400 does not deform within the blow molding mold 300.

[0043] The blow molding process of the cup body 100 can be roughly described as follows: Before blowing the preform 400, the preform 400 can be heated to a predetermined temperature. Since the mouth of the preform 400 does not deform during the blow molding process of the cup body 100, the mouth of the preform 400 does not need to be heated.

[0044] To facilitate handling of the preform 400 during heating, the preform 400 can be fixed to the preform clamp 500, allowing the preform 400 to be manipulated by operating the preform clamp 500. The inner wall of the opening of the preform 400 is provided with an internal thread, and the preform clamp 500 can be provided with an external thread that matches the internal thread, allowing the preform clamp 500 to be threadedly connected to the opening of the preform 400, but this is not a limitation.

[0045] Specifically, before entering the blow molding mold 300, the mouth of the preform 400 can be fixed on the preform clamp 500. During the heating process of the preform 400, the mouth of the preform 400 can be kept outside the heating device, thereby avoiding the preform 400 from being heated and deformed.

[0046] To improve the heating uniformity of the preform 400, the preform 400 can be kept rotating during the heating process. For example, but not limited to, the preform 400 can be rotated by rotating the preform clamp 500. As an example, the preform 400 can be set to rotate at a predetermined speed as needed, which further improves the heating uniformity of the preform 400.

[0047] Then, the preform 400 heated to a predetermined temperature can be placed in the blow molding mold 300. At this time, the mouth of the preform 400 can be placed in the mouth cavity. Gas can be blown into the mouth of the preform 400 to make the preform 400 expand and fit into the cup body cavity of the blow molding mold 300. At this time, the cup body 100 is blown in the blow molding mold 300. After the temperature of the cup body 100 drops, it can be taken out from the blow molding mold 300.

[0048] Reference Figure 7During the blow molding process of the preform 400 within the blow mold 300, a tension rod 600 can be used to accelerate the forming of the cup body 100. As an example, the tension rod 600 can be inserted into the preform 400 through its opening, and pushed so that its end abuts against the bottom of the preform 400. Further pushing of the tension rod 600 causes the preform 400 to be stretched and deformed axially. Simultaneously, gas is blown into the opening of the preform 400, allowing it to expand and deform radially under the influence of the gas. The arrows in the diagram indicate the approximate flow direction of the material in the preform 400 during the blow molding process. Thus, during the blow molding of the preform 400, the tension rod 600 is used to directionally stretch the preform 400 axially. By using the tension rod 600 in conjunction with air blowing, the preform 400 can expand and deform radially while being stretched axially, allowing it to quickly conform to the inner wall of the mold cavity and complete the blow molding process.

[0049] In this embodiment, the end surface of the tension rod 600 is smooth to avoid mechanical damage to the bottom of the preform 400, but this is not a limitation. The tension rod 600 is a known structure used in blow molding processes and will not be described in detail here.

[0050] return Figure 4 and Figure 5 In this embodiment, the mold body 301 may include a first half-mold 3011 and a second half-mold 3012 that are engaged with each other. When it is necessary to blow the preform 400, the first half-mold 3011 and the second half-mold 3012 can be engaged and assembled, forming a mold cavity for blowing the preform 400 within the assembled mold body 301. This embodiment uses the mold body 301 including the first half-mold 3011 and the second half-mold 3012 as an example for illustration, but it is not limited thereto. As needed, the mold body 301 may also be configured to include at least three lobes, and at least three lobes can be assembled into a mold. As an example, the bottom of the mold body 301 is provided with a through hole, through which the mold cavity can communicate with the outside. The mold body 301 may also include a bottom core 3013, which is disposed within the through hole, but it is not limited thereto.

[0051] Reference Figure 5 and Figure 6 To facilitate the smooth demolding of the blown cup 100, the flange 302 of the blow mold 300 may have a radial inner wall 3021, a first connecting wall 3022 and a second connecting wall 3023. The first connecting wall 3022 connects the radial inner wall 3021 and the cavity wall of the cup body mold cavity, and the second connecting wall 3023 connects the radial inner wall 3021 and the cavity wall of the mouth mold cavity. The first connecting wall 3022 and the second connecting wall 3023 extend obliquely relative to the radial inner wall 3021.

[0052] According to an exemplary embodiment of this disclosure, a first interior angle is formed between the radial inner wall 3021 and the first connecting wall 3022, a second interior angle is formed between the radial inner wall 3021 and the second connecting wall 3023, a third interior angle is formed between the first connecting wall 3022 and the cavity wall of the cup body mold cavity, and a fourth interior angle is formed between the second connecting wall 3023 and the cavity wall of the mouth mold cavity. The first interior angle, the second interior angle, the third interior angle, and the fourth interior angle are all obtuse angles.

[0053] Furthermore, during the blowing process of the preform 400, in order to avoid local material accumulation or thinning at the corners of the mold cavity, which would lead to uneven material distribution in the cup body 100, in this embodiment, the first inner corner, the second inner corner, the third inner corner, and the fourth inner corner are all rounded. The preform 400 can flow evenly at the rounded corners, thereby ensuring that the wall thickness of the cup body 100 is uniform and consistent, effectively ensuring the quality of the cup body 100.

[0054] In order to further enable the cup body 100 to be demolded smoothly, the included angle α between the first connecting wall 3022 and the second connecting wall 3023 satisfies 15°≤α≤25°.

[0055] As an example, the included angle α can be 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23° or 24°, and can also be 15.5°, 16.5°, 17.5°, 18.5°, 19.5°, 20.5°, 21.5°, 22.5°, 23.5° or 24.5° as needed, but is not limited to these.

[0056] The cup body 100 provided in this disclosure is a plastic cup body. The cup lid connecting part 102 of the cup body 100 is provided with an internal thread so as to match the cup lid of the thermos cup. This makes the cup lid of the thermos cup suitable for both thermos cups and plastic cup bodies, improving the versatility of the cup lid and thus reducing the manufacturing cost of the cup lid.

[0057] The cup body 100 provided in this disclosure is manufactured using a blow molding process. A water-sealing platform 103 is provided between the cup body section 101 and the lid connecting part 102 of the cup body 100. The water-sealing platform 103 can cooperate with the lid 200 to seal the drinking water in the inner cavity of the cup body 100 and prevent drinking water leakage. As an example, a sealing ring 206 can be provided at the bottom of the lid 200. When the lid 200 is engaged with the lid connecting part 102, the sealing ring 206 can seal with the water-sealing platform 103, thereby preventing drinking water from leaking through the gap at the connection between the lid 200 and the lid connecting part 102.

[0058] In the description of this disclosure, it should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0059] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0060] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0061] The features, structures, or characteristics described in this disclosure can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the foregoing description to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

Claims

1. A cup, characterised in that, The cup body (100) is made of plastic. The cup body (100) includes a cup body section (101) and a cup lid connecting part (102) connected to the cup body section (101). A water sealing platform (103) is provided at the connection between the cup body section (101) and the cup lid connecting part (102). The water sealing platform (103) protrudes from the inner side wall of the cup lid connecting part (102) into the inner cavity of the cup body (100) and extends continuously along the circumference of the cup body (100). The water sealing platform (103) is used to seal with the cup lid (200).

2. The cup of claim 1, wherein The inner wall of the cup lid connecting part (102) is provided with an internal thread, and the water sealing platform (103) is provided on the side of the internal thread facing the bottom of the cup body (100).

3. The cup of claim 1, wherein At the position corresponding to the water sealing platform (103), the outer peripheral wall of the cup body (100) is recessed to form an annular groove (104), the annular groove (104) extends continuously along the circumference of the cup body (100), and the cup body (100) also includes a decorative ring (105), the decorative ring (105) being disposed in the annular groove (104).

4. The cup of claim 1, wherein The cup body (100) is made of polypropylene, polycarbonate or polyethylene terephthalate.

5. A cup characterized in that, The cup includes a lid (200) and a body (100) according to any one of claims 1-4, wherein the lid (200) is capable of being combined with the lid connecting portion (102).

6. The cup of claim 5, wherein, A sealing ring (206) is provided at the bottom of the cup lid (200). When the cup lid (200) is combined with the cup lid connecting part (102), the sealing ring (206) can seal with the water sealing platform (103).

7. A blow mold characterized by, The blow molding die (300) is used to form a cup body (100) according to any one of claims 1-4. The blow molding die (300) has a mold cavity, which includes a cup body mold cavity corresponding to the cup body section (101) and a mouth mold cavity corresponding to the cup lid connecting part (102). A flange (302) is provided at the connection between the cup body mold cavity and the mouth mold cavity. The flange (302) protrudes from the cavity wall of the mold cavity into the mold cavity and extends continuously along the circumferential direction of the blow molding die (300). The flange (302) is used to form the sealing platform (103) on the cup body (100) during the blow molding process.

8. The blow mold of claim 7, wherein, The flange (302) has a radial inner wall (3021), a first connecting wall (3022) and a second connecting wall (3023). The first connecting wall (3022) connects the radial inner wall (3021) and the cavity wall of the cup body mold cavity, and the second connecting wall (3023) connects the radial inner wall (3021) and the cavity wall of the mouth mold cavity. The first connecting wall (3022) and the second connecting wall (3023) extend obliquely relative to the radial inner wall (3021).

9. The blow mold of claim 8, wherein, A first interior angle is formed between the radial inner wall (3021) and the first connecting wall (3022), a second interior angle is formed between the radial inner wall (3021) and the second connecting wall (3023), a third interior angle is formed between the first connecting wall (3022) and the cavity wall of the cup body mold cavity, and a fourth interior angle is formed between the second connecting wall (3023) and the cavity wall of the mouth mold cavity. The first interior angle, the second interior angle, the third interior angle and the fourth interior angle are all obtuse angles, and rounded corners are provided at the first interior angle, the second interior angle, the third interior angle and the fourth interior angle.

10. The blow mold according to claim 8 or 9, characterized in that The included angle α between the first connecting wall (3022) and the second connecting wall (3023) satisfies 15°≤α≤25°.

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