Glass bottle encapsulation mold and product thereof

Abstract

The application relates to the technical field of molds, and particularly discloses a glass bottle encapsulating mold and a product thereof. The glass bottle encapsulating mold comprises a bottle mouth positioning structure arranged on a lower mold plate, the bottle mouth positioning structure comprises a positioning insert arranged on the lower mold plate and a high-temperature-resistant deformable sleeve block sleeved outside the positioning insert, the inner side wall of the deformable sleeve block is provided with a thread structure matched with a thread part of a glass bottle mouth, the top of the positioning insert is provided with an annular taper part, and the annular taper part comprises a buffer part used for abutting against the end part of the glass bottle mouth. The glass bottle encapsulating mold can realize full encapsulation of a glass bottle body, has good positioning effect, and effectively reduces the influence of injection impact force on the glass bottle.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and in particular to a glass bottle overmolding mold and its products. Background Technology

[0002] Glass bottles are widely used in baby products due to their high transparency, non-toxicity, odorlessness, and high-temperature resistance. Compared to plastic bottles, they are healthier and safer, and suitable for high-temperature sterilization. However, glass bottles are fragile and slippery. To address this, glass bottles with an outer silicone coating have appeared on the market, which reduces the slipperiness and fragility of the bottles to some extent.

[0003] However, during the silicone overmolding process, stable clamping is difficult to achieve due to the large molding tolerances of glass bottles. Existing processes typically use top and bottom clamping, which can only achieve partial silicone overmolding. To achieve complete overmolding of the bottle body, the positioning structure of existing molds is prone to causing the glass bottle to tilt, resulting in a decrease in molding quality. Moreover, due to the high brittleness of glass, the bottle opening is easily damaged by impact during clamping and silicone injection. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a glass bottle overmolding mold and its product, achieving a fully overmolded glass bottle with good positioning and effectively reducing the impact of injection molding force on the glass bottle.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A glass bottle overmolding mold includes: an upper mold plate, a lower mold plate, and a bottle mouth positioning structure disposed on the lower mold plate. The bottle mouth positioning structure includes a positioning insert disposed on the lower mold plate and a high-temperature resistant deformable sleeve block sleeved on the outside of the positioning insert. The inner sidewall of the deformable sleeve block is provided with a threaded structure that mates with the threaded portion of the glass bottle mouth. The top of the positioning insert is provided with an annular cone portion, and the annular cone portion includes a buffer portion for abutting against the end of the glass bottle mouth.

[0007] According to some embodiments of the present invention, the height of the highest end of the threaded structure is higher than the height of the lowest end of the annular cone.

[0008] According to some embodiments of the present invention, the angle α between the inclined surface of the annular cone and the horizontal plane is 40-70°.

[0009] According to some embodiments of the present invention, the positioning insert is provided with an annular groove for accommodating the buffer portion, the buffer portion being formed in the annular groove, and the outer surface of the buffer portion being flush with the inclined surface of the annular cone portion.

[0010] According to some embodiments of the present invention, a left forming slider and a right forming slider are arranged opposite to each other on the lower template. Both the left forming slider and the right forming slider include forming parts, and the bottom of the forming parts of the left forming slider and the right forming slider have protrusions. When the mold is closed, the protrusions are spaced at a preset distance from the glass bottle body.

[0011] According to some embodiments of the present invention, the bottle mouth positioning structure further includes a positioning protrusion disposed on the lower template, and the outer periphery of the deformable sleeve block is provided with a positioning groove that cooperates with the positioning protrusion.

[0012] According to some embodiments of the present invention, the bottle mouth positioning structure includes a rotary drive structure for driving the deformable sleeve block to rotate.

[0013] According to some embodiments of the present invention, the bottom of the left forming slider and the right forming slider are both provided with a first pull block, the lower template is provided with a second pull block that cooperates with the first pull block, the first pull block is disposed outside the second pull block, the second pull block is provided with a first limiting protrusion on the side facing the second pull block, and the first pull block is provided with a first limiting groove that cooperates with the first limiting protrusion.

[0014] According to some embodiments of the present invention, both the left forming slider and the right forming slider have guide grooves and limiting grooves that gradually slope inward from bottom to top on both side walls. The upper template has guide protrusions that slide in accordance with the guide grooves on the inner side. The bottom of the upper template is fixed with a second limiting protrusion, which slides in the limiting groove. When the second limiting protrusion moves to a preset position, the second limiting protrusion abuts against the top of the limiting groove.

[0015] Another aspect of the present invention provides the following technical solution: a product manufactured using a mold as described in any of the first aspects above.

[0016] The present invention has at least the following beneficial effects:

[0017] The bottle mouth positioning structure is fixed by the threaded structure on the inner side of the deformable sleeve block and the threaded part of the glass bottle mouth, so as to achieve the positioning of the glass bottle in the radial and vertical directions. The buffer part of the annular cone at the top of the positioning insert elastically abuts against the end of the glass bottle mouth, and the axial positioning of the glass bottle is achieved by using the inclined wedge tightening principle.

[0018] The buffer section avoids rigid fixation of the glass bottle mouth and buffers the impact force on the glass bottle mouth during the molding and injection process, minimizing the risk of glass bottle breakage. This allows for low-cost overall encapsulation molding of the glass bottle without clamping the bottle body.

[0019] The deformable sleeve material can adapt to the tolerance fluctuations of the glass bottle mouth, ensure a tight thread fit, avoid rigid contact that could cause the glass to break, and at the same time, its high temperature resistance meets the temperature requirements of injection molding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of a bottle mouth positioning structure according to an embodiment of the present invention;

[0022] Figure 3 As an embodiment of the present invention Figure 1 Sectional view of line AA in the middle;

[0023] Figure 4 This is one embodiment of the present invention. Figure 3 Enlarged view of the area marked A in the middle;

[0024] Figure 5 As an embodiment of the present invention Figure 1 Sectional view of the middle BB line;

[0025] Figure 6 This is a schematic diagram of the structure of the left and right forming sliders according to an embodiment of the present invention. Detailed Implementation

[0026] The present invention is provided below with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0027] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0029] Embodiments of the present invention provide a glass bottle overmolding mold, such as... Figure 1-6As shown, it includes: an upper template 11, a lower template 12, and a bottle mouth positioning structure 2 disposed on the lower template 12. The bottle mouth positioning structure 2 includes a positioning insert 210 disposed on the lower template 12 and a high-temperature resistant deformable sleeve 220 sleeved on the outside of the positioning insert 210. The inner side wall of the deformable sleeve 220 is provided with a threaded structure 221 that mates with the threaded portion 43 of the glass bottle mouth 42. The top of the positioning insert 210 is provided with an annular cone portion 211, and the annular cone portion 211 includes a buffer portion 212 for abutting against the end of the glass bottle mouth 42.

[0030] The bottle mouth positioning structure 2 is fixed by the threaded structure 221 on the inner side of the deformable sleeve block 220 and the threaded part 43 of the glass bottle mouth 42, realizing the positioning of the glass bottle in the radial and vertical directions. The buffer part 212 of the annular cone part 211 at the top of the positioning insert 210 elastically abuts against the end of the glass bottle mouth 42. The axial positioning of the glass bottle is realized by the inclined wedge tightening principle, and the cone surface has a self-centering function, which can automatically correct the slight deviation of the bottle mouth, effectively compensate for the molding tolerance of the glass bottle, and prevent the bottle body from tilting. The buffer part 212 is set to flexibly abut against the glass bottle mouth 42 to avoid rigid fixation. At the same time, it buffers the impact force on the glass bottle mouth 42 during the molding and glue injection process, minimizing the breakage of the glass bottle. Thus, the overall encapsulation molding of the glass bottle can be achieved at low cost without clamping the bottle body.

[0031] Specifically, the threaded portion 43 of the glass bottle neck 42 is screwed into the threaded structure 221 of the deformable sleeve 220 and gradually rotates downwards until it abuts against the buffer portion 212 on the positioning insert 210. In this embodiment, the deformable sleeve 220 uses high-temperature resistant plastic materials such as high-temperature nylon and PEEK. These materials have a certain degree of deformability and can produce slight deformation to achieve a tight fit within the tolerance range of the glass bottle neck 42, but will not produce significant elastic deformation, thus maintaining the limiting effect. The deformable sleeve 220 adapts to the tolerance fluctuations of the glass bottle neck 42, ensures a tight threaded fit, and avoids rigid contact that could cause the glass to break. The high-temperature resistance of the deformable sleeve 220 refers to the fact that the high-temperature resistance characteristics of the sleeve need to meet the temperature requirements of injection molding. In this embodiment, the sleeve is at least 150°C, because conventional materials will soften and deform at the high temperature of molding, while high-temperature resistant plastics such as high-temperature nylon or PEEK can maintain their stability.

[0032] In some embodiments, such as Figure 4 As shown, the height of the highest end of the threaded structure 221 is higher than the height of the lowest end of the annular cone 211.

[0033] This positional constraint ensures that the threaded portion 43 of the glass bottle neck 42 is first screwed into the threaded structure 211, and then abuts against the buffer portion 212 of the annular cone portion 211.

[0034] In some embodiments, such as Figure 4 As shown, the angle α between the inclined surface of the annular cone 211 and the horizontal plane is 40-70°.

[0035] This angle range ensures a reasonable distribution of contact pressure between the buffer part 212 and the end of the glass bottle mouth 42, preventing the buffer part 212 from being squeezed and deformed downwards along the conical surface when it comes into contact with the glass bottle mouth 42, thus guaranteeing the buffering effect. Simultaneously, this angle range can accommodate the conical angle dimensions of most conventional glass bottle mouths 42. The angle of the buffer part 212 in conjunction with the inclined surface of the annular cone part 211 needs to be matched with a suitable thickness. If the thickness is too large, the amount of compression deformation of the buffer part 212 during downward pressure will be too large, resulting in excessive axial displacement of the glass bottle, distortion of the overmolding dimensions, decreased molding accuracy, and a tendency to slip. If the thickness is too thin, it cannot effectively absorb the impact force of the injection, resulting in poor buffering effect and easy breakage of the glass. In this embodiment, the thickness of the buffer part 212 is 0.3mm-2mm. Within this thickness range, the buffering effect is optimal, ensuring effective buffering under injection pressure while controlling dimensional deviations within the allowable range.

[0036] Furthermore, the buffer portion 212 is made of silicone with a Shore hardness of 40-60A.

[0037] Silicone combines good cushioning and resilience with sufficient compressive strength. It can absorb the impact of mold closing and injection through elastic deformation to prevent glass breakage, and it can withstand injection pressure without being over-compressed and affecting molding accuracy, ensuring the continuous stability of the 42-axis limit of the glass bottle mouth during the molding process.

[0038] In some embodiments, such as Figure 2 , 4 As shown, the positioning insert 210 is provided with an annular groove for accommodating the buffer part 212. The buffer part 212 is formed in the annular groove, and the outer surface of the buffer part 212 is flush with the inclined surface of the annular cone part 211.

[0039] Specifically, the secondary forming of the buffer portion 212 in the annular groove includes the following steps:

[0040] S1. Apply silicone steel bonding adhesive into the annular groove of the annular cone 211;

[0041] S2. Add liquid silicone into the annular groove;

[0042] S3. Press the annular cone portion 211 of the positioning insert 210 downward into the precast mold steel, and heat and vulcanize it to form the buffer portion 212.

[0043] The annular groove provides circumferential restraint to the buffer section 212, preventing it from shifting or falling off under high pressure during injection. The flush design ensures a smooth and uniform force-bearing surface at the end of the glass bottle mouth 42, facilitating precise calculation and control of axial positioning dimensions and simplifying mold design parameters. Secondary molding enhances the robustness of the buffer section 212, preventing detachment and extending its service life.

[0044] S1. Apply silicone-steel bonding adhesive into the annular groove of the annular cone portion 211. Applying adhesive in this step, compared to directly molding the buffer portion 212 within the annular groove, greatly improves the tightness between the two, extending their service life. Furthermore, the silicone-steel bonding adhesive provides better adhesion than ordinary adhesives, effectively preventing the buffer portion 212 from detaching. The silicone-steel bonding adhesive used here includes, but is not limited to, Sanlibao's SB-136-2 adhesive.

[0045] S2. Add liquid silicone into the annular groove;

[0046] S3. Press the annular cone portion 211 of the positioning insert 210 downwards into the precast mold steel, and heat and vulcanize it to form the buffer portion 212. Liquid silicone is vulcanized at high temperature in the mold, and the buffer portion 212 and the positioning insert 210 form an integrated structure. By vulcanizing the liquid silicone within the positioning insert 210, the adhesion between the two is greatly improved compared to the conventional patch bonding structure. At the same time, the buffer portion 212 formed by vulcanization can adapt to the high temperature environment of the mold.

[0047] In some embodiments, such as Figure 3-5 As shown, a left forming slider 31 and a right forming slider 32 are arranged opposite each other on the lower template 12. Both the left forming slider 31 and the right forming slider 32 include a forming part 301. The bottom of the forming part 301 of the left forming slider 31 and the right forming slider 32 has a protrusion 302. When the mold is closed, the protrusion 302 is spaced at a preset distance from the glass bottle body 41.

[0048] Because the glass bottle molding tolerance is large, the glass bottle body 41 has size fluctuations. The preset distance is a compensation space reserved by those skilled in the art for the protrusion 302 to the glass bottle body 41 according to the actual tolerance of the glass bottle body 41, so as to avoid the protrusion 302 directly squeezing the outer wall of the glass and prevent the bottle body from being crushed by the molding force.

[0049] In some embodiments, such as Figure 5 As shown, the bottle mouth positioning structure 2 also includes a positioning protrusion 231 set on the lower template 12, and a positioning groove 232 that cooperates with the positioning protrusion 231 is provided on the outer periphery of the deformable sleeve block 220.

[0050] In this embodiment, there are two positioning protrusions 231, which are arranged opposite to each other in the positioning grooves 232 on both sides of the deformable sleeve block 220 to form a bidirectional anti-rotation constraint. The positioning protrusions 231 are used to prevent the deformable sleeve block 220 from rotating due to the reaction force of the thread engagement during mold closing and glue injection, and at the same time to prevent the sleeve block from rotating when manually screwing in or out the glass bottle.

[0051] In some embodiments, the bottle mouth positioning structure 2 includes a rotation drive structure for driving the deformable sleeve 220 to rotate.

[0052] A rotary drive structure (not shown in the figure) enables the automatic rotation of the deformable sleeve 220 to quickly screw in and fix or unscrew glass bottles, significantly improving production efficiency and reducing manual labor intensity. Specific implementation methods include, but are not limited to: belt drive and motor drive: a belt drives a driven pulley extending from the bottom of the sleeve, a motor output shaft connects to a driving pulley, the motor drives the driving pulley to rotate, and the belt drives the driven pulley and the sleeve to rotate, thus achieving the rotation of the deformable sleeve 220; gear drive and motor drive: a driven gear extends from the bottom of the sleeve, a motor drives the driving gear, and the driving gear meshes with the driven gear ring, etc., to achieve rotation of the deformable sleeve 220. Furthermore, this structure can be used with limit blocks or other structures to control the rotation stroke, or the rotation stroke can be controlled by a servo motor or other control systems.

[0053] Furthermore, such as Figure 3 As shown, the bottom of the left forming slider 31 and the right forming slider 32 are both provided with a first pull block 303, and the lower template 12 is provided with a second pull block 304 that cooperates with the first pull block 303. The first pull block 303 is located outside the second pull block 304. The side of the second pull block 304 facing the second pull block 304 is provided with a first limiting protrusion 305, and the first pull block 303 is provided with a first limiting groove 306 that cooperates with the first limiting protrusion 305.

[0054] During mold opening, the upper mold moves the first pull block 303 upwards, while the second pull block 304 is fixed on the lower mold plate 12. The upward movement of the forming slider is restricted by the hook-and-loop engagement of the first limiting protrusion 305 and the first limiting groove 306. The forming slider can only move horizontally. After reaching the safe distance for lateral core pulling, the first limiting protrusion 305 disengages from the first limiting groove 306, allowing the forming slider to move upwards. This structure ensures that the forming slider can only slide laterally outwards during core pulling, avoiding the lateral force generated by the oblique shaking during conventional core pulling, which could cause the glass bottle to break.

[0055] Furthermore, springs 311 are provided on the top of the left forming slider 31 and the right forming slider 32. When the mold is closed, the springs 311 are compressed to store energy. When the mold is opened, the springs 311 are released to assist the forming slider to move downward, preventing the first pull block 303 and the second pull block 304 from locking up.

[0056] Furthermore, such as Figure 6 As shown, both sides of the left forming slider 31 and the right forming slider 32 are provided with guide grooves 307 and limiting grooves 308 that gradually slope inward from bottom to top. The inner side of the upper template 11 is provided with guide protrusions 309 that slide in accordance with the guide grooves 307. The bottom of the upper template 11 is fixed with a second limiting protrusion 310. The second limiting protrusion 310 slides in the limiting groove 308. When the second limiting protrusion 310 moves to the preset position, the second limiting protrusion 310 abuts against the top of the limiting groove 308.

[0057] The cooperation between the guide protrusion 309 and the guide groove 307 allows the slider to slide smoothly along the inclined direction during mold opening and closing to complete mold closing and closing or mold opening and separation. The height of the limiting groove 308 is set by those skilled in the art according to the mold opening distance of the forming slider. During mold opening, the second limiting protrusion 310 slides in the limiting groove 308 until it reaches the preset position. After that, the second limiting protrusion 310 abuts against the top of the limiting groove 308, and at the same time, it can drive the slider as a whole to rise upward, assisting the slider to disengage from the lower template 12. Both the guide groove 307 and the limiting groove 308 are opened on the vertical side of the slider rather than on the inclined surface, reducing the vertical influence of the mold opening force on the forming slider. The "inner side" in the gradually inward inclination from bottom to top refers to the inner side of the mold, with the left forming slider 31 towards the right forming slider 32 or the right forming slider 32 towards the left forming slider 31.

[0058] Specifically, in this embodiment, the upper template 11 is provided with an upper mold insert 111, and the guide protrusion 309 and the second limiting protrusion 310 are both provided on the upper mold insert 111 for easy processing.

[0059] A second aspect of the present invention provides a product manufactured using a mold as described in any of the above embodiments. Products formed using this mold exhibit stable quality, high molding precision, and low defect rate.

[0060] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the invention. Therefore, those skilled in the art will understand that the foregoing description of various embodiments of the invention is illustrative only and not intended to limit the invention as defined by the appended claims and their equivalents.

Claims

1. A glass bottle overmolding mold, characterized in that, include: The upper template (11), the lower template (12), and the bottle mouth positioning structure (2) provided on the lower template (12) include a positioning insert (210) provided on the lower template (12) and a high-temperature resistant deformable sleeve (220) sleeved on the outside of the positioning insert (210). The inner side wall of the deformable sleeve (220) is provided with a thread structure (221) that cooperates with the threaded part (43) of the glass bottle mouth (42). The top of the positioning insert (210) is provided with an annular cone (211), and the annular cone (211) includes a buffer part (212) for abutting against the end of the glass bottle mouth (42).

2. The glass bottle overmolding mold according to claim 1, characterized in that: The height of the highest end of the threaded structure (221) is higher than the height of the lowest end of the annular cone (211).

3. The glass bottle overmolding mold according to claim 1, characterized in that: The angle α between the inclined surface of the annular cone (211) and the horizontal surface is 40-70°.

4. The glass bottle overmolding mold according to claim 1, characterized in that: The positioning insert (210) is provided with an annular groove for accommodating the buffer part (212), the buffer part (212) is formed in the annular groove, and the outer surface of the buffer part (212) is flush with the inclined surface of the annular cone part (211).

5. The glass bottle overmolding mold according to claim 1, characterized in that: The lower template (12) is provided with a left forming slider (31) and a right forming slider (32) opposite to each other. Both the left forming slider (31) and the right forming slider (32) include a forming part (301). The bottom of the forming part (301) of the left forming slider (31) and the right forming slider (32) has a protrusion (302). When the mold is closed, the protrusion (302) is spaced at a preset distance from the glass bottle body (41).

6. The glass bottle overmolding mold according to claim 1, characterized in that: The bottle mouth positioning structure (2) also includes a positioning protrusion (231) provided on the lower template (12), and the outer periphery of the deformable sleeve block (220) is provided with a positioning groove (232) that cooperates with the positioning protrusion (231).

7. The glass bottle overmolding mold according to claim 1, characterized in that: The bottle mouth positioning structure (2) includes a rotation drive structure for driving the deformable sleeve block (220) to rotate.

8. A glass bottle overmolding mold according to claim 5, characterized in that: The bottom of the left forming slider (31) and the right forming slider (32) are provided with a first pull block (303). The lower template (12) is provided with a second pull block (304) that cooperates with the first pull block (303). The first pull block (303) is located outside the second pull block (304). The second pull block (304) has a first limiting protrusion (305) on the side facing the second pull block (304). The first pull block (303) has a first limiting groove (306) that cooperates with the first limiting protrusion (305).

9. A glass bottle overmolding mold according to claim 5, characterized in that: The left forming slider (31) and the right forming slider (32) are provided with guide grooves (307) and limiting grooves (308) that gradually slope inward from bottom to top on both sides. The upper template (11) is provided with guide protrusions (309) that slide in accordance with the guide grooves (307) on the inner side. The bottom of the upper template (11) is fixed with a second limiting protrusion (310). The second limiting protrusion (310) slides in the limiting groove (308). When the second limiting protrusion (310) moves to the preset position, the second limiting protrusion (310) abuts against the top of the limiting groove (308).

10. A product, characterized in that: It is prepared using the mold described in any one of claims 1-9.

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