A mold for a silicone straw pacifier

Abstract

The utility model relates to mould technical field discloses a kind of mould of silica gel suction tube nipple, including upper die and lower die, the cavity of multiple suction tube nipple is formed after upper die and lower die close die, lower die includes base, multiple setting on base mould core, left mould slide plate, right mould slide plate, the drive mechanism of driving left mould slide plate and right mould slide plate close die and parting, left mould slide plate is opened with left half outer mould, right mould slide plate is opened with right half outer mould, left half outer mould, right half outer mould and mould core close die form the sealing connection bottom ring cavity of suction tube nipple.The utility model provides silica gel suction tube nipple by lower die design is split type structure, since left mould slide plate or right mould slide plate separates, the outer surface of sealing connection bottom ring and sealing groove are completely exposed, completely eliminate the reverse buckling resistance of traditional integrated lower die, avoid the deformation of sealing connection bottom ring, sealing groove breakage caused by forcibly stripping, significantly improve yield.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold for a silicone straw nipple. Background Technology

[0002] Silicone sippy cups, as a core component of infant bottles, are widely used in infant feeding scenarios due to the non-toxic, soft, and temperature-resistant properties of silicone, as well as its excellent sealing performance. Their core function is to allow the baby to drink liquid from the bottle, while a sealing ring at the bottom ensures a tight seal with the bottle opening, eliminating the risk of leakage. This sealing ring typically features an annular sealing groove to further enhance sealing reliability.

[0003] Currently, the industrial production of silicone straw nipples mainly adopts thermoforming, which involves heating and pressurizing solid silicone through a mold to solidify the silicone and fill the cavity to form the target product. To meet market demand for production volume, existing molds are generally designed with a multi-cavity structure. The lower mold has an independent mold core for each product. During production, a certain amount of solid silicone material is pre-placed on each mold core. Then, the upper and lower molds are closed, and the silicone material is melted, flowed, and fills the entire cavity through thermoforming. After solidification, a silicone straw nipple with a sealing connection bottom ring is formed.

[0004] However, because the sealing connection bottom ring and its sealing groove are formed by the lower mold, their structural design must match the sealing requirements of the bottle mouth. This results in a high degree of fit between the sealing connection bottom ring and the lower mold cavity, a large contact area after molding, and the concave structure of the sealing groove creates a backlash resistance during demolding. In existing technologies, the lower mold is mostly a one-piece molded structure, lacking a detachable design, making it difficult for the silicone straw nipple to detach smoothly from the lower mold core and cavity after heat pressing and curing. Forced demolding not only easily causes product defects such as deformation of the sealing connection bottom ring and damage to the sealing groove, but may also lead to wear of the mold core, reducing the service life of the mold. At the same time, it significantly increases the demolding operation time, restricting the improvement of production efficiency and making it difficult to adapt to the large-scale production needs of multi-cavity molds.

[0005] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a mold for silicone straw nipples, which aims to solve the technical problem of difficult demolding of silicone straw nipples in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A mold for a silicone straw nipple includes an upper mold and a lower mold. When the upper mold and the lower mold are closed, they form multiple cavities for the straw nipple. The lower mold includes a base, multiple mold cores disposed on the base, a left mold slide plate slidably disposed on the base and located to the left of the mold cores, a right mold slide plate slidably disposed on the base and located to the right of the mold cores, and a drive mechanism for driving the left and right mold slide plates to close and separate. A left half of the outer mold is formed on the left mold slide plate, and a right half of the outer mold is formed on the right mold slide plate. The left half of the outer mold, the right half of the outer mold, and the mold cores are closed to form a sealing connection bottom ring cavity for the straw nipple.

[0008] As a further improvement to the above technical solution, the cavities of the multiple straw nipples are arranged in a row at intervals, the base is provided with a horizontally extending guide rail, and the left mold slide plate and the right mold slide plate are provided with horizontally extending grooves that are slidably connected to the guide rail.

[0009] As a further improvement to the above technical solution, the driving mechanism includes a first single-rod hydraulic cylinder and a second single-rod hydraulic cylinder, wherein the first single-rod hydraulic cylinder is drivenly connected to the left mold slide plate, and the second single-rod hydraulic cylinder is drivenly connected to the right mold slide plate.

[0010] As a further improvement to the above technical solution, the driving mechanism includes a bidirectional double-rod hydraulic cylinder, one of the output rods of which is connected to the left mold slide plate through a first connecting member, and the other output rod is connected to the right mold slide plate through a second connecting member.

[0011] As a further improvement to the above technical solution, the cavities of the straw nipple are provided in two rows. Each row of straw nipple cavities is equipped with multiple mold cores arranged at intervals, a left mold slide plate disposed on the left side of these mold cores, and a right mold slide plate disposed on the right side of these mold cores. The first connecting member is connected to two left mold slide plates at the same time, and the second connecting member is connected to two right mold slide plates at the same time.

[0012] As a further improvement to the above technical solution, each row has four cavities for sippy nipples.

[0013] As a further improvement to the above technical solution, the first connecting member includes a first vertical block and a first horizontal plate connected to the middle of the first vertical block, the second connecting member includes a second vertical block and a second horizontal plate connected to the top of the second vertical block, the second horizontal plate is offset above the first horizontal plate, the first vertical block is connected to one of the output rods of the bidirectional double-rod hydraulic cylinder, the second vertical block is connected to the other output rod of the bidirectional double-rod hydraulic cylinder, the first horizontal plate is simultaneously connected to two left mold slides, and the second horizontal plate is simultaneously connected to two right mold slides.

[0014] As a further improvement to the above technical solution, the upper mold and the lower mold are set on a hot press. The hot press has a track for guiding the lower mold to move back and forth, and a displacement cylinder connected to the base. The displacement cylinder drives the lower mold to move forward into the mold closing hot press station, so that the upper mold and the lower mold are aligned, or drives the lower mold to move backward into the demolding station.

[0015] Beneficial effects: The silicone straw nipple provided by this utility model has a split-type lower mold design. After the left or right mold slide is separated, the outer surface of the sealing connection bottom ring and the sealing groove are fully exposed, which completely eliminates the undercut resistance of the traditional one-piece lower mold, avoids deformation of the sealing connection bottom ring and damage to the sealing groove caused by forced demolding, and significantly improves the yield.

[0016] In addition, there is no friction caused by hard pulling during demolding. The mold core only bears the natural adhesion force of the silicone, avoiding surface scratches or wear, extending the service life of the mold, and reducing maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the lower mold in the closed state.

[0018] Figure 2 This is a schematic diagram of the mold structure for the left and right mold slides.

[0019] Figure 3 This is a schematic diagram of the structure of the upper mold.

[0020] Figure 4 This is a schematic diagram of the structure of a straw nipple.

[0021] Explanation of main component symbols: 1-Upper mold, 11-Mounting base plate, 12-Upper template, 13-Upper cavity, 2-Lower mold, 21-Base, 22-Mold core, 23-Left mold slide plate, 231-Left half outer mold, 24-Right mold slide plate, 241-Right half outer mold, 3-Drive mechanism, 31-Two-way double rod hydraulic cylinder, 32-First connecting component, 321-First vertical block, 322-First horizontal plate, 33-Second connecting component, 331-Second vertical block, 332-Second horizontal plate, 41-Guide rail, 42-Slide groove, 5-Sucking nipple, 51-Sealing connection bottom ring, 52-Sucking head, 53-Sucking body. Detailed Implementation

[0022] This utility model provides a mold for a silicone straw nipple 5. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0024] Please see Figures 1 to 4 As shown, this utility model provides a mold for a silicone straw nipple 5, including an upper mold 1 and a lower mold 2. After the upper mold 1 and the lower mold 2 are closed, they form multiple cavities for the straw nipple 5. The lower mold 2 includes a base 21, multiple mold cores 22 disposed on the base 21, a left mold slide plate 23 slidably disposed on the base 21 and located to the left of the mold cores 22, a right mold slide plate 24 slidably disposed on the base 21 and located to the right of the mold cores 22, and a drive mechanism 3 for driving the left mold slide plate 23 and the right mold slide plate 24 to close and separate the molds. A left half of the outer mold 231 is provided on the left mold slide plate 23, and a right half of the outer mold 241 is provided on the right mold slide plate 24. The left half of the outer mold 231, the right half of the outer mold 241 and the mold cores 22 are closed to form a cavity for the sealing connection bottom ring 51 of the straw nipple 5.

[0025] During operation, the drive mechanism 3 controls the left mold slide plate 23 and the right mold slide plate 24 to slide to both sides along the base 21 (in a separated state), at which time the mold core 22 is fully exposed; a certain amount of solid silicone material blocks are pre-placed on each mold core 22. Then, the drive mechanism 3 drives the left mold slide plate 23 and the right mold slide plate 24 to slide towards each other until they are closed, and the left half of the outer mold 231 and the right half of the outer mold 241 are spliced ​​together to form a complete outer mold, which together with the mold core 22 encloses the cavity of the sealing connection bottom ring 51 (including the annular sealing groove); then the upper mold 1 and the lower mold 2 are closed, further enclosing and forming multiple complete straw nipple cavities 5 (including the straw body 53 and the sealing connection bottom ring 51).

[0026] The mold is heated and pressurized, causing the silicone block on the mold core 22 to melt and flow, fully filling the entire cavity. After heat preservation and curing, it forms a shaped silicone straw nipple 5.

[0027] After curing, the upper mold 1 and the lower mold 2 are separated first (relieving the constraint on the main body of the straw nipple 5); then the left and right mold slides 24 are driven to separate to both sides by the drive mechanism 3, so that the left half outer mold 231 and the right half outer mold 241 are simultaneously separated from the outer surface of the sealing connection bottom ring 51 and the sealing groove. Through the separation of the split outer mold, the obstruction of the sealing groove undercut structure to demolding is directly eliminated.

[0028] After the left mold slide plate 23 and the right mold slide plate 24 are completely separated, the sealing connection bottom ring 51 only contacts the surface of the mold core 22 (without backlash resistance), and the molded product can be easily removed from the mold core 22 to complete one production cycle.

[0029] The silicone straw nipple 5 provided by this utility model designs the lower mold 2 as a split structure. After the left mold slide plate 23 or the right mold slide plate 24 is separated, the outer surface of the sealing connection bottom ring 51 and the sealing groove are fully exposed, which completely eliminates the backing resistance of the traditional one-piece lower mold 2, avoids deformation of the sealing connection bottom ring 51 and damage to the sealing groove caused by forced demolding, and significantly improves the yield.

[0030] In addition, there is no friction caused by hard pulling during demolding. The mold core 22 only bears the natural adhesion force of the silicone, avoiding surface scratches or wear, extending the service life of the mold, and reducing maintenance costs.

[0031] Specifically, the cavities of the multiple straw nipples 5 are arranged in a row (front and back) interval, so that the mold core 22, the left half of the outer mold 231, and the right half of the outer mold 241 are arranged in a regular and orderly batch layout: on the one hand, the front and back row arrangement of the cavities can make full use of the longitudinal space of the base 21 and arrange more cavities within the limited mold size; on the other hand, the multiple half of the outer mold on the left mold slide 23 and the right mold slide 24 correspond one-to-one with the cavities, and when the mold is closed, the forming of all the sealing connection bottom ring 51 cavities can be completed simultaneously, and when the mold is separated, the undercut structure of all products can be unlocked simultaneously, ensuring that the forming and demolding rhythm of batch products is consistent and improving the coordination of single batch production.

[0032] Furthermore, the base 21 is provided with a laterally extending guide rail 41, and the left mold slide plate 23 and the right mold slide plate 24 are provided with laterally extending grooves 42 that are slidably connected to the guide rail 41. The sliding engagement between the guide rail 41 and the grooves 42 of the left mold slide plate 23 and the right mold slide plate 24 forms a rigid guiding constraint, which can strictly limit the movement direction of the mold slide plate during lateral sliding (only left and right translation), avoiding front-to-back offset or skew during sliding, and ensuring precise docking of the left half of the outer mold 231 and the right half of the outer mold 241 when the mold is closed. At the same time, the multiple cavities arranged in a row are guided by the unified guide rail 41 to achieve synchronous mold closing and mold opening, ensuring that the cavity size of the sealing connection bottom ring 51 of each product is consistent, improving the dimensional stability of batch products, and ensuring the sealing compatibility with the bottle mouth.

[0033] In one embodiment, the driving mechanism 3 includes a first single-rod hydraulic cylinder and a second single-rod hydraulic cylinder. The first single-rod hydraulic cylinder is driven to the left mold slide plate 23, and the second single-rod hydraulic cylinder is driven to the right mold slide plate 24. In the initial state, the piston rods of the first and second single-rod hydraulic cylinders are in the retracted state, driving the left mold slide plate 23 to slide to the left along the transverse guide rail 41 of the base 21 and the right mold slide plate 24 to slide to the right along the guide rail 41 (the two are in the maximum separation state). At this time, multiple mold cores 22 arranged in a row along the front-back direction on the base 21 are fully exposed. The operator or automated equipment places a quantitative solid silicone block onto each mold core 22 in the front-back direction.

[0034] During mold separation, the piston rods of the first and second single-rod hydraulic cylinders extend synchronously: the first single-rod hydraulic cylinder pushes the left mold slide plate 23 to slide to the right along the guide rail 41, and the second single-rod hydraulic cylinder pushes the right mold slide plate 24 to slide to the left along the guide rail 41; the left mold slide plate 23 and the right mold slide plate 24 achieve lateral guidance through the cooperation of the bottom sliding groove 42 and the guide rail 41, ensuring smooth sliding without deviation, until the multiple left half outer molds 231 on the left mold slide plate 23 are precisely aligned with the corresponding right half outer molds 241 on the right mold slide plate 24, forming a complete outer mold, which together with the lower mold core 22 encloses multiple sealing connection bottom ring cavities 51 (including annular sealing grooves).

[0035] The single-rod hydraulic cylinder provides continuous and stable thrust and pull through hydraulic drive. The extension and retraction of its piston rod can be precisely controlled (e.g., by adjusting the speed through a flow valve and controlling the stroke endpoint through a limit structure), ensuring precise alignment of the left mold slide 23 and right mold slide 24 during mold closing. This is especially crucial for ensuring the dimensional accuracy of the sealing connection bottom ring 51 and the annular sealing groove (avoiding deformation of the sealing groove due to mold misalignment and ensuring a proper seal with the bottle neck). During mold separation, the cylinder-driven uniform separation prevents the mold slides from scratching the molded product, further guaranteeing product integrity. During silicone thermoforming, the cavity needs to maintain a certain closing pressure to prevent overflow when the silicone melts. The single-rod hydraulic cylinder provides significant thrust, ensuring a tight fit between the left mold slide 23 and right mold slide 24 after mold closing, forming a sealed cavity together with the upper mold 1 and mold core 22. This effectively prevents flash or dimensional deviations caused by overflow, improving molding quality.

[0036] In another embodiment, the drive mechanism 3 includes a bidirectional double-rod cylinder 31, one of the output rods of which is connected to the left mold slide plate 23 via a first connecting member 32, and the other output rod is connected to the right mold slide plate 24 via a second connecting member 33.

[0037] In the initial state, the two output rods of the bidirectional double-rod hydraulic cylinder 31 are in the maximum extended state (extending to both sides along the cylinder axis). Through the first connecting member 32 and the second connecting member 33, the left mold slide plate 23 is driven to slide to the left along the transverse guide rail 41 of the base 21, and the right mold slide plate 24 is driven to slide to the right along the guide rail 41 (the two are in the maximum separation state). At this time, the multiple mold cores 22 arranged in a row along the front-back direction on the base 21 are fully exposed. The operator or automated equipment places a quantitative solid silicone block into each mold core 22 in the front-back direction.

[0038] Oil is supplied to the hydraulic chamber of the double-acting double-rod cylinder 31 to drive the two output rods to retract inward synchronously (moving in opposite directions along the cylinder axis): the left mold slide plate 23 is pulled to the right along the guide rail 41 by the first connecting member 32, and the right mold slide plate 24 is pulled to the left along the guide rail 41 by the second connecting member 33; the left mold slide plate 23 and the right mold slide plate 24 are guided laterally by the cooperation of the bottom slide groove 42 and the guide rail 41 to ensure smooth sliding without deviation, until the multiple left half outer molds 231 on the left mold slide plate 23 are precisely aligned with the corresponding right half outer molds 241 on the right mold slide plate 24 to form a complete outer mold, which together with the lower mold core 22 encloses multiple sealing connection bottom ring cavities 51 (including annular sealing grooves).

[0039] The two output rods of the bidirectional double-rod hydraulic cylinder 31 are integrated into the same cylinder body and driven by the same hydraulic source, resulting in naturally consistent extension and retraction strokes and speeds (eliminating the synchronization errors that may occur with independent control of dual single-rod hydraulic cylinders). This ensures that the left mold slide plate 23 and the right mold slide plate 24 can move in opposite directions in strict synchronicity during mold closing, enabling the multiple row-arranged left half outer molds 231 and right half outer molds 241 to simultaneously and accurately align (the splicing error can be controlled within a smaller range), especially ensuring the molding consistency of high-precision structures such as the annular sealing groove of the sealing connection bottom ring 51; during mold separation, they move in opposite directions in synchronicity, avoiding product scratches or cavity interference caused by excessively fast movement on one side, further improving the dimensional stability of batch products.

[0040] Preferably, the cavities of the straw nipple 5 are arranged in two rows, with the two rows of cavities arranged side by side. This fully utilizes the lateral space of the base 21, doubling the number of straw nipples 5 that can be molded simultaneously. Each row of straw nipple 5 cavities is equipped with multiple mold cores 22 arranged at intervals, a left mold slide plate 23 located to the left of these mold cores 22, and a right mold slide plate 24 located to the right of these mold cores 22. The first connecting member 32 is connected to two left mold slide plates 23 simultaneously, and the second connecting member 33 is connected to two right mold slide plates 24 simultaneously. This ensures that the opening and closing actions of the left mold slide plates 23 and right mold slide plates 24 in both rows are completely synchronized. This avoids problems such as excessively tight or loose mold closing of some cavities due to asynchronous driving in the two rows, and deviations in the forming dimensions of the sealing connection bottom ring 51 or sealing groove. It ensures that the structural precision of all products in the two rows is highly consistent, guaranteeing the stability of the product's sealing performance.

[0041] In this embodiment, each row has four cavities for the sippy nipple 5, achieving a compact and reasonable layout within the longitudinal space of the base 21. This layout fully utilizes the effective coverage area of ​​the mold slide while providing sufficient heat dissipation and venting clearance for each cavity, preventing defects such as air bubbles and material shortages caused by poor venting during silicone melting. With four cavities per row, the total number of products molded in a single cycle for a double row is eight. This number avoids both insufficient production capacity due to too few cavities in a single row and excessive cavity count causing mold space congestion or operational interference.

[0042] Furthermore, the first connecting member 32 includes a first vertical block 321 and a first horizontal plate 322 connected to the middle of the first vertical block 321. The second connecting member 33 includes a second vertical block 331 and a second horizontal plate 332 connected to the top of the second vertical block 331. The second horizontal plate 332 is offset above the first horizontal plate 322. The first vertical block 321 is connected to one of the output rods of the bidirectional double-rod hydraulic cylinder 31, and the second vertical block 331 is connected to the other output rod of the bidirectional double-rod hydraulic cylinder 31. The first horizontal plate 322 is simultaneously connected to two left mold slide plates 23, and the second horizontal plate 332 is simultaneously connected to two right mold slide plates 24. The second horizontal plate 332 is offset above the first horizontal plate 322, forming a vertically layered layout. This completely solves the spatial interference problem between the first connecting member 32 and the second connecting member 33 during synchronous driving. When the bidirectional double-rod cylinder 31 drives the two output rods to move in opposite directions, the first horizontal plate 322 and the second horizontal plate 332 translate laterally. Due to the vertical height misalignment, the two will not collide or rub against each other, ensuring that the opening and closing actions of the left mold slide plate 23 and the right mold slide plate 24 are smooth and unobstructed. This is especially suitable for compact layout scenarios with double-row multi-cavity molds.

[0043] In actual use, the upper mold 1 and lower mold 2 are mounted on a hot press. The hot press's worktable is equipped with a track to guide the lower mold 2 to move back and forth, and a displacement cylinder connected to the base 21. Initially, the piston rod of the displacement cylinder is extended, driving the lower mold 2 (including the base 21, double-row mold cores 22, left mold slide plate 23, right mold slide plate 24, and connecting components, etc.) to move backward along the track of the hot press's worktable to the demolding station. At this time, the lower mold 2 is completely separated from the upper mold 1 (without the influence of heat radiation). The left mold slide plate 23 and right mold slide plate 24 are in a separated state under the drive of the bidirectional double-rod cylinder 31, and the double-row (four in each row) mold cores 22 are fully exposed. Operators or automated equipment place a quantitative amount of solid silicone material blocks on all mold cores 22 at the demolding station to complete the material preparation.

[0044] After the materials are prepared, the piston rod of the displacement cylinder retracts, driving the lower mold 2 to move forward precisely along the track until the lower mold 2 is completely aligned with the upper mold 1 of the hot press (mold closing hot pressing station). The guiding effect of the track ensures that there is no lateral displacement during the movement of the lower mold 2, so that the cavities of the upper mold 1 and the lower mold 2 are precisely aligned.

[0045] It should be noted that the mold core 22 and the base 21 are separate structures. The model is fixed to the base 21 by screws. The base 21 has a positioning groove that cooperates with the mold core 22, and a threaded hole is provided in the middle of the positioning groove.

[0046] In this embodiment, the upper mold 1 includes a mounting base plate 11 and an upper template. The upper template matches the layout of the lower mold 2, that is, the bottom of the upper mold 1 has two rows of upper cavities 13, each row with four spaced-apart cavities. The row spacing and the front-to-back spacing within each row are completely consistent with the arrangement of the mold core 22 of the lower mold 2, ensuring precise alignment with the cavity of the sealing connection bottom ring 51 of the lower mold 2 when the mold is closed, together forming a complete outline of the straw nipple 5. The upper cavity 13 corresponds to the sucking head 52 and the straw body 53 (the transition section connected to the sealing connection bottom ring 51) of the straw nipple 5. Its inner wall is smooth and its dimensional accuracy conforms to the product design (such as the curvature of the sucking head 52, the inner diameter of the straw, etc.), and it is seamlessly connected with the top outline of the mold core 22 of the lower mold 2.

[0047] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A mold for a silicone straw nipple, characterized in that, The device includes an upper mold and a lower mold. When the upper mold and the lower mold are closed, they form multiple cavities for the straw nipple. The lower mold includes a base, multiple mold cores disposed on the base, a left mold slide plate slidably disposed on the base and located to the left of the mold cores, a right mold slide plate slidably disposed on the base and located to the right of the mold cores, and a drive mechanism for driving the left mold slide plate and the right mold slide plate to close and separate the molds. The left mold slide plate has a left half of the outer mold, and the right mold slide plate has a right half of the outer mold. When the left half of the outer mold, the right half of the outer mold, and the mold cores are closed, they form a sealing connection bottom ring cavity for the straw nipple.

2. The mold for the silicone straw nipple according to claim 1, characterized in that, The cavities of the multiple straw nipples are arranged in a row at intervals. The base is provided with a horizontally extending guide rail. The left mold slide and the right mold slide are provided with horizontally extending grooves that are slidably connected to the guide rail.

3. The mold for the silicone straw nipple according to claim 2, characterized in that, The driving mechanism includes a first single-rod hydraulic cylinder and a second single-rod hydraulic cylinder. The first single-rod hydraulic cylinder is driven and connected to the left mold slide plate, and the second single-rod hydraulic cylinder is driven and connected to the right mold slide plate.

4. The mold for the silicone straw nipple according to claim 2, characterized in that, The drive mechanism includes a bidirectional double-rod hydraulic cylinder. One of the output rods of the bidirectional double-rod hydraulic cylinder is connected to the left mold slide plate through a first connecting member, and the other output rod is connected to the right mold slide plate through a second connecting member.

5. The mold for the silicone straw nipple according to claim 4, characterized in that, The cavities of the straw nipple are arranged in two rows. Each row of the straw nipple cavities is equipped with multiple mold cores arranged at intervals, a left mold slide plate located on the left side of these mold cores, and a right mold slide plate located on the right side of these mold cores. The first connecting member is connected to two left mold slide plates at the same time, and the second connecting member is connected to two right mold slide plates at the same time.

6. The mold for the silicone straw nipple according to claim 5, characterized in that, Each row has four cavities for the sippy tube nipple.

7. The mold for the silicone straw nipple according to claim 5, characterized in that, The first connecting member includes a first vertical block and a first horizontal plate connected to the middle of the first vertical block. The second connecting member includes a second vertical block and a second horizontal plate connected to the top of the second vertical block. The second horizontal plate is offset above the first horizontal plate. The first vertical block is connected to one of the output rods of the bidirectional double-rod hydraulic cylinder, and the second vertical block is connected to the other output rod of the bidirectional double-rod hydraulic cylinder. The first horizontal plate is simultaneously connected to two left mold slides, and the second horizontal plate is simultaneously connected to two right mold slides.

8. The mold for the silicone straw nipple according to any one of claims 1-7, characterized in that, The upper and lower molds are mounted on a hot press. The hot press has a track on its worktable that guides the lower mold to move back and forth, and a displacement cylinder that is driven by the base. The displacement cylinder drives the lower mold to move forward into the mold closing hot press station to align the upper and lower molds, or drives the lower mold to move backward into the demolding station.

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