A cup lid injection mold that utilizes a sliding side opening mechanism for demolding.

Abstract

This utility model relates to the field of cup lid injection mold technology, and in particular to a cup lid injection mold that utilizes a sliding side opening for demolding operation. It includes an upper mold body and a lower mold body that cooperate with each other. The upper mold body is equipped with a glue injection system. An upper mold insert, which engages with the glue injection system, is located at the lower end of the upper mold body. At least one set of shovel base components and at least one set of spring components are also inclinedly arranged at the lower end of the upper mold body. At least one sliding block, which engages with the shovel base components, elastically abuts against the spring components. A limiting groove is provided on the back of the sliding block. The design of achieving demolding through sliding side opening effectively solves the problems of easy retention of the upper mold when the cup lid is molded facing upwards, and easy tearing or wrinkling during ejection when molded facing downwards, in traditional molding methods. The outer contour structure of the product formed by the docking of the two sliding blocks precisely matches the inner contour structure of the lower mold insert and the ejection mechanism, ensuring the accuracy of the cavity.

Description

Technical Field

[0001] This utility model relates to the field of cup lid injection mold technology, and in particular to a cup lid injection mold that utilizes a sliding side opening to achieve demolding operation. Background Technology

[0002] In the catering industry, disposable milk tea cups are widely used due to their convenience. The lid, a crucial component of these cups, is typically molded using injection molding. In existing disposable milk tea cup lids, the surface is an upward-facing, rounded protrusion. Significant problems exist in the molding and demolding processes for this type of lid. like Figure 1 As shown, when the cup lid a is formed with the top facing up, the upper surface of the cup lid a is formed by the upper mold b. Because there is a large contact area between the upper surface of the cup lid a and the upper mold b, the cup lid a is very likely to remain on the upper mold b during the demolding stage, making it difficult to demold smoothly and severely affecting production efficiency. To solve the above problem, as... Figure 2 As shown, some technologies attempt to reverse the cup lid a during molding, allowing the upper surface of the cup lid a to be formed by the lower mold c. However, this molding method faces new challenges during the ejection stage: when the ejection mechanism d ejects along the edge of the cup lid a, due to the large contact area between the surface of the cup lid a and the lower mold c, and the overall thickness of the cup lid a being very thin, a vacuum-like action can easily occur between the cup lid a and the lower mold c during the ejection process. This can cause damage such as tearing or wrinkling of the cup lid a, affecting the product quality of the cup lid.

[0003] In summary, for disposable milk tea cup lids with a rounded, protruding upper surface, there are currently insurmountable technical defects in the injection molding process, regardless of whether the upper or lower mold is used to form the upper surface. A new technical solution is urgently needed to solve these problems. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] A cup lid injection mold that utilizes a sliding side opening for demolding includes an upper mold body and a lower mold body that cooperate with each other. The upper mold body is equipped with a glue injection system. An upper mold insert that engages with the glue injection system is provided at the lower end of the upper mold body. At least one set of shovel base components and at least one set of spring components are also inclinedly provided at the lower end of the upper mold body. At least one sliding block that engages with the shovel base components is also provided at the lower end of the upper mold body, and the sliding block elastically abuts against the spring components. A limit groove is provided on the back of the sliding block. A limit block that extends into the limit groove is also provided at the lower end of the upper mold body. In the mold closed state, the limit block and the top of the limit groove are spaced together. In the mold open state, the limit block abuts against the top of the limit groove and, together with the shovel base components, restricts the sliding block to the lower end of the upper mold body. A lower mold insert and an ejector mechanism are provided on the lower mold body. In the mold closed state, the upper mold insert, the sliding block, the lower mold insert, and the ejector mechanism enclose a cavity that engages with the glue injection system.

[0006] Preferably, there are two sliding blocks, and the two sliding blocks are connected to both sides of the upper mold insert. The shovel base component and the spring component are respectively provided in two sets. The two sliding blocks are wound around the lower end of the upper mold insert and connected to each other. After the two sliding blocks are connected, they form the outer contour structure of the product. The middle of the outer contour structure of the product has an opening that matches the upper mold insert. The lower mold insert and the ejection mechanism form the inner contour structure of the product to connect with the outer contour structure of the product to form a cavity. The glue injection system connects to the cavity along the opening.

[0007] Preferably, the shovel base component has an inclined T-shaped slider, and the back of the sliding slider has a T-shaped through groove that matches the T-shaped slider. The shovel base and the sliding slider are movably connected through the T-shaped slider and the T-shaped through groove.

[0008] Preferably, a first oblique hole corresponding to the slope of the T-shaped slider is provided at the lower end of the upper mold body, and a second oblique hole corresponding to the slope of the T-shaped through groove is provided on the slide slider, with the spring component abutting between the first oblique hole and the second oblique hole.

[0009] Preferably, a fastening element is provided on the lower mold body, and a barb is provided on the fastening element. The lower end of the slide block is provided with a clearance groove and a barb groove located on one side of the clearance groove. The fastening element is engaged with the clearance groove, and in the mold closed state, the fastening element slides along the clearance groove to engage with the barb groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are: The side-opening demolding design effectively solves the problems of easy mold residue on the upper mold when the cup lid is molded facing upwards, and easy tearing or wrinkling during ejection when molded facing downwards, which are common in traditional molding methods. The outer contour structure of the product formed by the docking of two sliding blocks is precisely matched with the inner contour structure of the lower mold insert and the ejection mechanism, ensuring the accuracy of the cavity. The elastic force of the spring component drives the sliding block to abut against the lower mold body, so that the sliding block first slides laterally under the action of the shovel base component. Then, the sliding block is lifted by the rear abutment of the limiting block and the limiting groove, so that the sliding block moves upward with the upper mold body. This side demolding allows the outer surface of the product to separate smoothly from the mold, reducing damage to thin-walled cup lids, improving product quality and production efficiency, and is suitable for large-scale industrial production.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of one existing implementation method; Figure 2 This is a schematic diagram of another existing implementation method; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of this utility model; Figure 5 This is a partial cross-sectional structural diagram of the sliding block corresponding to the T-shaped through groove of this utility model; Figure 6 This is a partial cross-sectional structural diagram of the sliding block of this utility model corresponding to the second oblique hole; Figure 7 This is a schematic diagram of the structure of the sliding block and its docking components in this utility model.

[0014] The reference numerals and names in the figure are as follows: Upper mold body 10, upper template 101, panel 102, upper mold insert 11, shovel base component 12, T-shaped slider 121, spring component 13, limit block 14, first oblique hole 15, lower mold body 20, lower mold insert 21, ejection mechanism 22, push plate 221, push rod 222, annular demolding component 223, glue injection system 30, glue inlet 31, hot runner plate 32, hot nozzle 33, sliding slider 40, limit groove 41, T-shaped through groove 42, second oblique hole 43, clearance groove 44, barb groove 45, fastening component 50, barb 51. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] Please see Figure 1-7 In this embodiment of the present invention, a cup lid injection mold that utilizes a sliding side opening for demolding includes an upper mold body 10 and a lower mold body 20 that cooperate with each other. The upper mold body 10 mainly consists of an upper template 101 and a panel 102. The upper mold body 10 is provided with a glue injection system 30, which includes a glue inlet 31 disposed on the panel 102, a hot runner plate 32 disposed between the panel 102 and the upper template 101, and at least one hot nozzle 33 embedded in the upper mold body 10 and connected to the hot runner plate 32. The hot nozzle 33 is provided according to the number of mold cavities. The lower end is provided with an upper mold insert 11 that is connected to the injection system 30. The upper mold insert 11 is connected to the hot nozzle 33 of the injection system 30, so that the injection material is injected into the cavity through the hot nozzle 33. The lower end of the upper mold body 10 is also provided with at least one set of spade base components 12 and at least one set of spring components 13. The lower end of the upper mold body 10 is also provided with at least one sliding block 40 that is connected to the spade base component 12. The sliding block 40 is elastically abutted against the spring component 13. A limiting groove 41 is opened on the back of the sliding block 40. The lower end of the upper mold body 10 is also provided with a limiting block 14 that extends into the limiting groove 41. In the mold closed state, the limit block 14 and the top of the limit groove 41 are fitted together; in the mold open state, the limit block 14 abuts against the top of the limit groove 41, and together with the shovel base component 12, restricts the slide block 40 to the lower end of the upper mold body 10. The lower mold body 20 is provided with a lower mold insert 21 and an ejection mechanism 22. In the mold closed state, the upper mold insert 11, the sliding block 40, the lower mold insert 21 and the ejection mechanism 22 surround and form a cavity that is connected to the glue injection system 30. The lower mold insert 21 is an arc-shaped protrusion structure corresponding to the inner side of the cup lid. The ejection mechanism 22 mainly includes a push plate 221 that is provided in the lower mold body 20 and can be driven upward by an external power mechanism, a push rod 222 that is connected to the push plate 221 and moves through the lower mold body 20, and an annular demolding member 223 connected to the end of the push rod 222. The annular demolding member 223 surrounds the lower mold insert 21 and is used to form the edge of the cup lid. During demolding, it uses an upward pushing force to push the formed cup lid away from the lower mold insert 21. Through the structural arrangement of the sliding block 40, the spring component 13, and the limiting block 14, the sliding block 40 can be configured to slide laterally along the lower mold body 20 for a certain distance during the mold opening process, and then be driven upward by the upper mold body 10. This allows the outer surface of the product to separate from the sliding block 40 by lateral demolding after molding. Specifically, when the cup lid injection mold is in the mold-closed state, the upper mold insert 11, the two sliding blocks 40, the lower mold insert 21, and the ejection mechanism 22 enclose and form a cavity. The injection system 30 injects the injection material into the cavity through the opening via the hot nozzle 33. During the mold opening process, under the combined action of the shovel base component 12, the spring component 13, and the limiting block 14, the sliding block 40 first slides laterally a certain distance along the lower mold body 20. At this time, the outer surface of the product separates from the sliding block 40 through lateral movement. Subsequently, the limiting block 14 abuts against the top of the limiting groove 41 and together with the shovel base component 12, restricts the position of the sliding block 40, so that the sliding block 40 is driven upward by the upper mold body 10. The limiting block 14 abuts against the top of the limiting groove 41 and together with the shovel base component 12, restricts the position of the sliding block 40, preventing it from separating from the upper mold body 10, and finally completes the product demolding.

[0017] Furthermore, two sliding blocks 40 are provided, and the two sliding blocks 40 are connected to both sides of the upper mold insert 11. The shovel base component 12 and the spring component 13 are provided in two sets respectively. The two sliding blocks 40 are wound around the lower end of the upper mold insert 11 and connected to each other. After the two sliding blocks 40 are connected, they form the outer contour structure of the product. The middle of the outer contour structure of the product has an opening that matches the upper mold insert 11. The lower mold insert 21 and the ejection mechanism 22 form the inner contour structure of the product to connect with the outer contour structure of the product to form a cavity. The glue injection system 30 is connected to the cavity along the opening, so that the outer surface of the cup lid can be better separated from the mold when the mold is opened.

[0018] Therefore, the design of achieving demolding through side opening of the sliding blocks effectively solves the problems of easy retention of the upper mold when the cup lid is molded facing upwards and easy tearing or wrinkling when ejected when molded facing downwards in traditional molding methods. The outer contour structure of the product formed by the docking of the two sliding blocks 40 is precisely matched with the inner contour structure of the lower mold insert 21 and the ejection mechanism 22, ensuring the accuracy of the cavity. The elastic force of the spring component 13 is used to drive the sliding block 40 to abut against the lower mold body 20, so that the sliding block 40 slides laterally under the drive of the shovel base component 12, and then the sliding block 40 is lifted by the rear abutment cooperation of the limiting block 14 and the limiting groove 41, so that the sliding block 40 moves upward with the upper mold body 10. This side demolding makes the outer surface of the product smoothly separate from the mold, reduces damage to the thin-walled cup lid, improves product quality and production efficiency, and is suitable for large-scale industrial production.

[0019] Please see Figure 7 Based on the above technical solution, a further proposed feature is a T-shaped slider 121 inclined on the shovel base component 12, and a T-shaped through groove 42 matching the T-shaped slider 121 on the back of the sliding slider 40. The shovel base and the sliding slider 40 are movably connected through the T-shaped slider 121 and the T-shaped through groove 42. The inclined T-shaped slider 121 on the shovel base component 12 and the T-shaped through groove 42 on the back of the sliding slider 40 form a precisely matched movable connection. This structural design can provide stable guidance and limiting for the lateral sliding of the sliding slider 40 and its upward movement with the upper mold body 10. The structural fit effectively disperses the forces between the two components, preventing jamming or offset during relative movement. This ensures that the sliding block 40 slides laterally away from the outer surface of the product during mold opening and then moves upward with the upper mold body 10 more smoothly. At the same time, this connection structure enhances the fit accuracy between the shovel base component 12 and the sliding block 40, reduces wear after long-term use, extends the service life of the mold, further ensures the integrity of the cup lid product during lateral demolding, reduces the risk of product damage caused by component fit errors, and thus more stably improves production efficiency and product quality.

[0020] Please see Figure 6-7Based on the above technical solution, it is further proposed that a first oblique hole 15 corresponding to the slope of the T-shaped slider 121 be provided at the lower end of the upper mold body 10, and a second oblique hole 43 corresponding to the slope of the T-shaped through groove 42 be provided on the sliding slider 40. The spring component 13 is connected between the first oblique hole 15 and the second oblique hole 43. The first oblique hole 15 at the lower end of the upper mold body 10 and the second oblique hole 43 of the sliding slider 40 correspond to the slopes of the T-shaped slider 121 and the T-shaped through groove 42, respectively. The spring component 13 is connected between the two. This design enables the spring force direction of the spring component 13 to be precisely matched with the movement trajectory of the sliding slider 40. In the initial stage of mold opening, the spring component 13 can stably push the sliding slider 40 to slide laterally along the oblique direction, providing balanced and continuous power for the side opening of the sliding slider, avoiding the slider movement jamming or offset caused by the deviation of the spring force direction; at the same time, the oblique hole structure can play a limiting and guiding role for the spring component 13, preventing the spring component 13 from bending or misaligning during the extension and retraction process, and ensuring its long-term stability.

[0021] Please see Figure 6-7 Based on the above technical solution, it is further proposed that a fastening member 50 be provided on the lower mold body 20, and a barb 51 be provided on the fastening member 50. The lower end of the sliding block 40 is provided with a clearance groove 44 and a barb groove 45 located on one side of the clearance groove 44. The fastening member 50 is engaged with the clearance groove 44, and in the mold closed state, the fastening member 50 slides along the clearance groove 44 to engage with the barb groove 45. The fastening member 50 on the lower mold body 20 cooperates with the clearance groove 44 and the barb groove 45 at the lower end of the sliding block 40. In the mold closed state, the fastening member 50 slides along the clearance groove 44 and passes through the barb 51. The hook 51, which is connected to the undercut groove 45, can form a stable lateral limit on the slide block 40. This structure can effectively offset the lateral impact force generated by the molten material on the slide block 40 during injection molding, and avoid the deviation of the cavity size accuracy caused by the slide block 40 being offset by force, thus ensuring the consistency of the cup lid molding. At the same time, the snap-fit ​​design of the undercut 51 and the undercut groove 45 enhances the connection stability between the slide block 40 and the lower mold body 20 when the mold is closed, reduces the loosening of the mold parts under the action of injection pressure, reduces the fitting clearance caused by vibration, further improves the sealing performance of the cavity, and prevents molten material leakage.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A cup cover injection mold using row position side opening to realize demolding operation, characterized in that, The upper mold body (10) and lower mold body (20) are mutually cooperating. The upper mold body (10) is provided with a glue injection system (30). The lower end of the upper mold body (10) is provided with an upper mold insert (11) that engages with the glue injection system (30). The lower end of the upper mold body (10) is also provided with at least one set of shovel base components (12) and at least one set of spring components (13). The lower end of the upper mold body (10) also has at least one sliding block (40) that engages with the shovel base component (12). The sliding block (40) elastically abuts against the spring component (13). A limiting groove (41) is provided on the back of the sliding block (40). The lower end of the mold body (20) is also provided with a limiting block (14) that extends into the limiting groove (41); in the mold closed state, the limiting block (14) and the top of the limiting groove (41) are fitted together; in the mold open state, the limiting block (14) abuts against the top of the limiting groove (41) and together with the shovel base component (12), restricts the sliding block (40) to the lower end of the upper mold body (10); the lower mold body (20) is provided with a lower mold insert (21) and an ejector mechanism (22); in the mold closed state, the upper mold insert (11), the sliding block (40), the lower mold insert (21) and the ejector mechanism (22) surround and form a cavity that is connected to the injection system (30).

2. The cup cover injection mold using row position side opening to realize demolding operation according to claim 1, characterized in that, There are two sliding blocks (40), and the two sliding blocks (40) are connected to the two sides of the upper mold insert (11). The shovel base component (12) and the spring component (13) are respectively provided in two sets. The two sliding blocks (40) are wound around the lower end of the upper mold insert (11) and connected to each other. After the two sliding blocks (40) are connected, they form the outer contour structure of the product. The middle of the outer contour structure of the product has an opening that matches the upper mold insert (11). The lower mold insert (21) and the ejector mechanism (22) form the inner contour structure of the product to connect with the outer contour structure of the product to form a cavity. The glue injection system (30) is connected to the cavity along the opening.

3. The cup lid injection mold with row position side opening for demolding operation according to claim 1, characterized in that, The shovel base component (12) has an inclined T-shaped slider (121), and the back of the sliding slider (40) has a T-shaped through groove (42) that matches the T-shaped slider (121). The shovel base and the sliding slider (40) are movably connected through the T-shaped slider (121) and the T-shaped through groove (42).

4. The cup lid injection mold with row position side opening for demolding operation according to claim 3, characterized in that, The upper mold body (10) has a first inclined hole (15) corresponding to the slope of the T-shaped slider (121) at the lower end, and the slide slider (40) has a second inclined hole (43) corresponding to the slope of the T-shaped through groove (42). The spring component (13) is connected between the first inclined hole (15) and the second inclined hole (43).

5. The cup lid injection mold with row position side opening for demolding operation according to claim 1, characterized in that, A fastening part (50) is provided on the lower mold body (20), and a barb (51) is provided on the fastening part (50). A clearance groove (44) and a barb groove (45) located on one side of the clearance groove (44) are provided at the lower end of the sliding block (40). The fastening part (50) is connected to the clearance groove (44), and in the mold closing state, the fastening part (50) slides along the clearance groove (44) to connect with the barb groove (45).

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