Bottle cap inner injection mold
By setting gates on the side wall of the die core and using the mold release force to shear the water outlet, the problem of gates affecting the appearance of the bottle cap is solved, and the outer wall of the bottle cap is flattened and the mold is quickly replaced, improving production efficiency.
Patent Information
- Application Number
- CN202422141350.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-02
AI Technical Summary
In the existing injection mold, the gate is located outside the molding gap, causing the outer wall of the bottle cap to form a water outlet, which affects the appearance and requires post-processing, and is inconvenient to replace the mold.
A bottle cap injection mold is designed, and the gate is placed on the side wall of the mold core. Through the connecting structure between the mold core and the mold core column, the gate is located at the inner wall of the bottle cap, and the water outlet is sheared by using the mold release force, and the production of bottle caps of different specifications is achieved by quickly replacing the mold core, front mold core and rear mold core.
The aesthetics and integrity of the outer wall of the bottle cap is achieved, while simplifying the mold replacement process and improving production efficiency.
Smart Images
Figure CN223173470U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of molds, in particular to an injection mold for the inner part of a bottle cap. Background Art
[0002] Most plastic bottle caps are injection molded by an injection mold. The common structure of the injection mold on the market is as follows: a front mold core is arranged on the front mold, and several front forming cavities communicated with the gate are arranged in the front mold core; a mold core column and two rear mold cores slidably arranged are arranged on the rear mold, and semi-forming cavities are arranged on both of the two rear mold cores. When in use, the front mold drives the front mold core to be combined with the rear mold. When the front mold acts, it will drive the two rear mold cores to be combined. The front mold core and the two rear mold cores are combined to form a complete bottle cap forming cavity, and the mold core column is located in the bottle cap forming cavity and there is a forming gap between the mold core column and the bottle cap forming cavity. During injection molding, the molten plastic enters the forming gap from the gate, and after cooling, the bottle cap is formed. Then the front mold and the rear mold are opened, the bottle cap is sleeved on the mold core column, and finally, demolding is carried out through a strong pull mold. Since the gate of the injection mold with this structure is connected to the front forming cavity, the gate is located outside the forming gap, so a sprue will be formed between the outer top wall of the formed bottle cap and the gate, which not only needs to be processed later, but also affects the appearance. Summary of the Utility Model
[0003] The purpose of the utility model is to provide an injection mold for the inner part of a bottle cap, in which the sprue of the injection molded bottle cap is located on the inner wall of the bottle cap, which can ensure the beauty of the outer wall of the bottle cap, and is also convenient for replacing the mold core, the front mold core and the rear mold core.
[0004] To achieve the above object, the technical solution adopted by the utility model is: an in-mold injection mold for a bottle cap, comprising: a front mold and a rear mold. A plurality of mold core columns are arranged in the front mold, a runner is arranged in the mold core columns, a mold core is threadedly connected to the mold core columns, a gate communicating with the runner is arranged on the mold core, and the discharging end of the gate is located on the side wall of the mold core. A shoulder is arranged on the mold core, a baffle plate is embedded in the front mold, the rear side wall of the baffle plate is flush with the rear side wall of the front mold, the baffle plate is sleeved on the mold core through a positioning hole and abuts against the shoulder of the mold core. Two front mold cores are slidably clamped in the front mold, and semi-cylindrical forming cavities with the same number as the mold cores are arranged on the side walls of the two front mold cores. A plurality of inclined guide columns are arranged on both sides of the rear mold, inclined guide holes with the same number as the inclined guide columns are arranged on the front mold cores, and avoiding grooves with the same number as the inclined guide columns are arranged on both sides of the front mold. The two front mold cores are slidably clamped on the inclined guide columns on the same side through the inclined guide holes, and the inclined guide columns extend into the avoiding grooves on the same side in the front mold. A rear mold core is arranged on the rear mold, a plurality of rear forming cavities are arranged on the front side wall of the rear mold core, two rows of positioning pull rods are symmetrically arranged in the rear mold, internal threaded holes are arranged in the positioning pull rods, two rows of T-shaped limiting holes are symmetrically arranged in the rear mold core, the positioning pull rods extend into the corresponding T-shaped limiting holes, and hexagon socket head cap screws are arranged in the T-shaped limiting holes, and the hexagon socket head cap screws are threadedly connected to the internal threaded holes in the positioning pull rods and abut against the T-shaped limiting holes.
[0005] Further, for the above-mentioned in-mold injection mold for a bottle cap, a first cooling water channel is arranged on the front mold, a second cooling water channel communicating with the first cooling water channel and penetrating through the mold core column is arranged on the front side wall of the mold core column, an annular flow channel communicating with the second cooling water channel is arranged on the top wall of the mold core, and a plurality of cooling grooves communicating with the annular flow channel are circumferentially arranged in the mold core.
[0006] Further, for the above-mentioned in-mold injection mold for a bottle cap, a first sealing ring is arranged on the front side wall of the mold core column, the connection part of the second cooling water channel and the first cooling water channel is located inside the first sealing ring, and the mold core column is hermetically attached to the front mold through the first sealing ring. Two second sealing rings are arranged on the front side wall of the mold core, the annular flow channel is located between the two second sealing rings, and the mold core is hermetically attached to the mold core column through the two second sealing rings.
[0007] Further, for the above-mentioned in-mold injection mold for a bottle cap, the specific connection structure between the mold core column and the mold core is: a positioning ring platform is extended and arranged on the rear side wall of the mold core column, an external threaded section is extended and arranged on the positioning ring platform, a positioning ring groove and an internal threaded hole are arranged on the front side wall of the mold core, the annular flow channel is located in the positioning ring groove, the internal threaded hole on the mold core is threadedly connected to the external threaded section on the mold core column, and the positioning ring platform on the mold core column is clamped into the positioning ring groove of the mold core.
[0008] Further, for the above-mentioned injection mold inside the bottle cap, the specific connection structure between the front mold core and the front mold is as follows: Two track bars are symmetrically arranged on the rear side wall of the front mold. A dovetail guide rail is arranged on the rear side wall of the track bar. Two dovetail grooves are symmetrically arranged on the front side wall of the front mold core. The two dovetail grooves on the front mold core are respectively slidably clamped on the dovetail guide rails on the corresponding sides.
[0009] Further, for the above-mentioned injection mold inside the bottle cap, a rear baffle is arranged on the rear side wall of the rear mold. The rear baffle blocks the inclined guide post. A hexagonal pull rod head is arranged on the positioning pull rod. A positioning hole is arranged on the rear mold. A hexagonal hole is arranged on the positioning hole. The positioning pull rod extends into the T-shaped positioning hole. The hexagonal pull rod head of the positioning pull rod is clamped into the hexagonal hole. The pull rod head of the positioning pull rod abuts against the rear baffle.
[0010] The advantages of the present utility model are as follows: By arranging the gate on the mold core, the sprue of the injection-molded bottle cap will be located on the inner wall of the bottle cap, which can ensure the integrity and aesthetics of the outer wall of the bottle cap. By arranging the discharge end of the gate on the side wall of the mold core, when demolding, the shearing force can be formed between the sprue and the gate by using the demolding force, so that the sprue on the inner wall of the bottle cap can be sheared off flush along the inner wall of the bottle cap. It not only does not require post-treatment, but also can ensure the flatness of the inner wall of the bottle cap. When bottle caps of different specifications need to be produced, it can be realized by quickly replacing the mold core, the front mold core and the rear mold core, without disassembling and assembling the whole mold, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a schematic cross-sectional structure view of an injection mold inside a bottle cap according to the present utility model.
[0012] Figure 2 is a schematic cross-sectional structure view of an injection mold inside a bottle cap according to the present utility model in another direction.
[0013] Figure 3 is a schematic structure view of the cooperation between the mold core, the front mold core and the rear mold core when the mold is closed.
[0014] Figure 4 is a schematic structure view of the connection structure between the mold core column and the mold core.
[0015] Figure 5 is a schematic structure view when two front mold cores are opened.
[0016] Figure 6 is a schematic structure view when two front mold cores are closed. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The technical solutions of the present utility model will be further described below with reference to the accompanying drawings and preferred embodiments.
[0018] AsFigures 1 to 6 As shown in the figure, an injection mold inside a bottle cap of the present utility model includes a front mold 1 and a rear mold 2. In the front mold 1, a number of mold core columns 3 are provided. In the mold core columns 3, a runner 31 communicating with the runner groove in the front mold 1 is provided. A mold core 4 is threadedly connected to the mold core column 3. A positioning ring platform 32 is extended and provided on the rear side wall of the mold core column 3. An external thread section is extended and provided on the positioning ring platform 32. A positioning ring groove 41 and an internal thread hole are provided on the front side wall of the mold core 4. The internal thread hole on the mold core 4 is threadedly connected to the external thread section on the mold core column 3. The positioning ring platform 32 on the mold core column 3 is snapped into the positioning ring groove 41 of the mold core 4 to improve the concentricity between the mold core 4 and the mold core column 3. A gate 42 communicating with the runner 31 is provided on the mold core 4. The discharging end of the gate 42 is located on the side wall of the mold core 4. A shoulder 43 is provided on the mold core 4. A baffle plate 11 is embedded in the front mold 1. The rear side wall of the baffle plate 11 is flush with the rear side wall of the front mold 1. The baffle plate 11 is sleeved on the mold core 4 through a positioning hole and abuts against the shoulder 43 of the mold core 4 to enhance the connection stability of the mold core 4. Two front mold cores 5 are slidably clamped in the front mold 1. Two track bars 12 are symmetrically provided on the rear side wall of the front mold 1. A dovetail guide rail 121 is provided on the rear side wall of the track bar 12. Two dovetail grooves 51 are symmetrically provided on the front side wall of the front mold core 5. The two dovetail grooves 51 on the front mold core 5 are respectively slidably clamped on the corresponding dovetail guide rails 121. Semi-cylindrical forming cavities 52 with the same number as the mold core 4 are provided on the side walls of the two front mold cores 5. A number of inclined guide posts 21 are provided on both sides of the rear mold 2. A rear baffle 22 is provided on the rear side wall of the rear mold 2. The rear baffle 22 blocks the inclined guide posts 21. A number of inclined guide holes 53 with the same number as the inclined guide posts 21 are provided on the front mold core 5. A number of avoidance grooves 13 with the same number as the inclined guide posts 21 on the same side as the rear mold 2 are provided on both sides of the front mold 1. The two front mold cores 5 are slidably clamped on the inclined guide posts 21 on the same side through the inclined guide holes 53. The inclined guide posts 21 extend into the avoidance grooves 13 on the same side in the front mold 1. A positioning groove is provided on the rear mold 2. A rear mold core 6 is clamped in the positioning groove. A number of rear forming cavities 61 are provided on the front side wall of the rear mold core 6. Two rows of positioning holes are symmetrically provided in the rear mold 2. A hexagonal hole is provided on the positioning hole. A positioning pull rod 23 is penetrated in the positioning hole. A hexagonal pull rod head is provided on the positioning pull rod 23. The hexagonal pull rod head is snapped into the hexagonal hole and abuts against the rear baffle 22. An internal thread hole 231 is provided in the positioning pull rod 23. Two rows of T-shaped limiting holes are symmetrically provided in the rear mold core 6. The positioning pull rod 23 extends into the corresponding T-shaped limiting holes. An internal hexagonal bolt 62 is penetrated in the T-shaped limiting hole. The internal hexagonal bolt 62 is threadedly connected to the internal thread hole 231 in the positioning pull rod 23 and abuts against the T-shaped limiting hole.
[0019] When performing injection molding, the front mold 1 drives the mold core column 3 and the front mold core 5 to move backward to close the mold with the rear mold 2. During this process, the two front mold cores 5 will be aligned under the guiding action of the inclined guide pillar 21. The semi-cylindrical forming cavities 52 on the two front mold cores 5 are aligned to form a complete front forming cavity. The front forming cavity surrounds the mold core 4 and there is a first forming gap between the front forming cavity and the mold core 4. When the front mold 1 and the rear mold 2 are closed, the two aligned front mold cores 5 and the rear mold core 6 are also closed at the same time. The front forming cavity is connected to the rear forming cavity 61. There is a second forming gap between the mold core 4 and the rear forming cavity 61, which is connected to the first forming gap. The molten plastic flows from the runner groove in the front mold 1 into the runner 31 of the mold core column 3, then flows from the runner 31 into the gate 42 of the mold core 4, and finally the molten plastic flows into the first forming gap and the second forming gap to form a bottle cap. A sprue is formed between the inner wall of the bottle cap and the gate 42. After cooling, the front mold 1 and the rear mold 2 are opened. The two front mold cores 5 are separated under the guiding action of the inclined guide pillar 21. The mold core 4 and the front mold core 5 move away from the rear mold core 6 at the same time. The bottle cap is sleeved on the mold core 4, and then a strong pull mold is used to demold the bottle cap from the mold core 4. Since the discharge port of the gate 42 is located on the side wall of the mold core 4, when the bottle cap is pulled and demolded, the gate 42 will apply a shearing force to the sprue between the inner wall of the bottle cap and the gate 42, so as to shear off the sprue flush with the inner wall of the bottle cap, ensuring the flatness of the inner wall of the bottle cap, and the outer wall of the bottle cap is a complete smooth surface, which can ensure the beauty of the bottle cap.
[0020] When different specifications of bottle caps need to be produced, the mold core 4, the front mold core 5 and the rear mold core 6 need to be replaced. At this time, only need to keep the front mold 1 and the rear mold 2 in the open state. First, remove the baffle plate 11, unscrew the mold core 4 from the mold core column 3 and replace it with a new mold core 4. Fix the baffle plate 11 back on the front mold 1. Then remove the rear baffle plate 22, pull out the inclined guide pillar 21 from the inclined guide hole 53 of the front mold core 5, slide the front mold core 5 away from the track bar 12, slide and snap the new front mold core 5 onto the track bar 12, snap the inclined guide pillar 21 into the inclined guide hole 53 of the new front mold core 5, and then fix the rear baffle plate 22 back on the rear mold 2. Finally, unscrew the hexagon socket head bolt 62 in the T-shaped limit hole to release the restriction on the rear mold core 6, remove the rear mold core 6 from the rear mold 2, reinstall the new rear mold core 6 in the positioning groove of the rear mold 2 and sleeve it on each positioning pull rod 23, and fix and lock the new rear mold core 6 with the hexagon socket head bolt 62. In this way, when replacing the mold core 4, the front mold core 5 and the rear mold core 6, it is not necessary to disassemble and assemble the whole mold, which simplifies the replacement process and improves the replacement efficiency. When the mold core 4, the front mold core 5 and the rear mold core 6 need to be maintained, it is also convenient to disassemble them for maintenance.
[0021] In order to improve the cooling efficiency after the bottle cap is formed, a first cooling water channel 14 is provided on the front mold 1. A second cooling water channel 34 that is connected to the first cooling water channel 14 and penetrates through the mold core column 3 is provided on the front side wall of the mold core column 3. A first sealing ring 33 is provided on the front side wall of the mold core column 3. The mold core column 3 is hermetically attached to the front mold 1 through the first sealing ring 33. The connection part of the second cooling water channel 34 and the first cooling water channel 14 is located within the first sealing ring 33. When the cooling water enters the second cooling water channel 34 from the first cooling water channel 14, it can prevent leakage between the front mold 1 and the mold core column 3. An annular flow channel 44 that is connected to the second cooling water channel 34 is provided in the positioning ring groove 41 of the mold core 4. A plurality of cooling grooves 45 that are connected to the annular flow channel 44 are circumferentially and evenly distributed on the mold core 4. Two second sealing rings 46 are provided on the front side wall of the mold core 4. The annular flow channel 44 is located between the two second sealing rings 46. The mold core 4 is hermetically attached to the mold core column 3 through the two second sealing rings 46. When the cooling water enters the annular flow channel 44 from the second cooling water channel 34 and flows, it can prevent leakage between the mold core 4 and the mold core column 3. After the injection molding is completed, the cooling water enters the annular flow channel 44 through the first cooling water channel 14 and the second cooling water channel 34 in the front mold 1. After passing through the annular flow channel 44, the cooling water enters the multiple cooling grooves 45 of the mold core 4 to uniformly cool the mold core 4 and the bottle cap on the mold core 4.
[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.
Claims
1. An injection mold inside a bottle cap, comprising: The front mold and the rear mold are characterized in that: several mold core columns are arranged in the front mold, a runner is arranged in the mold core columns, a mold core is threadedly connected to the mold core columns, a gate communicating with the runner is arranged on the mold core, the discharging end of the gate is located on the side wall of the mold core, a shoulder is arranged on the mold core, a baffle plate is embedded in the front mold, the rear side wall of the baffle plate is flush with the rear side wall of the front mold, the baffle plate is sleeved on the mold core through a positioning hole and abuts against the shoulder of the mold core, two front mold cores are slidably clamped in the front mold, semi-cylindrical forming cavities with the same number as the mold cores are arranged on the side walls of the two front mold cores, several inclined guide posts are arranged on both sides of the rear mold, inclined guide holes with the same number as the inclined guide posts are arranged on the front mold cores, avoidance grooves with the same number as the inclined guide posts are arranged on both sides of the front mold, the two front mold cores are slidably clamped on the inclined guide posts on the same side through the inclined guide holes, the inclined guide posts extend into the avoidance grooves on the same side in the front mold, a rear mold core is arranged on the rear mold, several rear forming cavities are arranged on the front side wall of the rear mold core, two rows of positioning pull rods are symmetrically arranged in the rear mold, internal threaded holes are arranged in the positioning pull rods, two rows of T-shaped limiting holes are symmetrically arranged in the rear mold core, the positioning pull rods extend into the corresponding T-shaped limiting holes, and hex socket head cap screws are arranged in the T-shaped limiting holes, and the hex socket head cap screws are threadedly connected to the internal threaded holes in the positioning pull rods and abut against the T-shaped limiting holes.
2. The injection mold inside the bottle cap according to claim 1, wherein: A first cooling water channel is arranged on the front mold, a second cooling water channel communicating with the first cooling water channel and penetrating through the mold core column is arranged on the front side wall of the mold core column, an annular flow channel communicating with the second cooling water channel is arranged on the top wall of the mold core, and several cooling grooves communicating with the annular flow channel are circumferentially distributed in the mold core.
3. The injection mold inside the bottle cap according to claim 2, characterized in that: A first sealing ring is arranged on the front side wall of the mold core column, the connection part of the second cooling water channel and the first cooling water channel is located inside the first sealing ring, and the mold core column is hermetically attached to the front mold through the first sealing ring. Two second sealing rings are arranged on the front side wall of the mold core, the annular flow channel is located between the two second sealing rings, and the mold core is hermetically attached to the mold core column through the two second sealing rings.
4. A kind of injection mold inside the bottle cap according to any one of claims 1 to 3, characterized in that: The specific connection structure between the mold core column and the mold core is as follows: a positioning ring platform is extended and arranged on the rear side wall of the mold core column, an external threaded section is extended and arranged on the positioning ring platform, a positioning ring groove and an internal threaded hole are arranged on the front side wall of the mold core, the annular flow channel is located in the positioning ring groove, the internal threaded hole on the mold core is threadedly connected to the external threaded section on the mold core column, and the positioning ring platform on the mold core column is clamped into the positioning ring groove of the mold core.
5. A bottle cap internal injection mold according to claim 1, characterized in that: The specific connection structure between the front mold core and the front mold is as follows: two track bars are symmetrically arranged on the rear side wall of the front mold, a dovetail guide rail is arranged on the rear side wall of the track bar, two dovetail grooves are symmetrically arranged on the front side wall of the front mold core, and the two dovetail grooves on the front mold core are respectively slidably clamped on the corresponding dovetail guide rails.
6. The injection mold inside the bottle cap according to claim 1, wherein: A rear baffle is provided on the rear side wall of the rear mold. The rear baffle blocks the inclined guide post. A hexagonal pull rod head is provided on the positioning pull rod. A positioning hole is provided on the rear mold. A hexagonal hole is provided in the positioning hole. The positioning pull rod extends into the T-shaped positioning hole. The hexagonal pull rod head of the positioning pull rod is snapped into the hexagonal hole. The pull rod head of the positioning pull rod abuts against the rear baffle.