CN216182420U - Injection mold for anti-theft rotary bottle cap - Google Patents

Abstract

An injection mold for an anti-theft rotary bottle cap is provided with at least one pair of first synchronous jacks and a pair of second synchronous jacks, wherein the first synchronous jacks and the second synchronous jacks are in transmission connection through a transmission structure, thread sleeves are arranged outside thread ejector rods of the first synchronous jacks and the second synchronous jacks, the transmission structure enables the thread sleeves of the first synchronous jacks and the second synchronous jacks to synchronously rotate and drive the thread ejector rods to rotate and rise, the first synchronous jacks drive an upper mold and a lower mold, and the second synchronous jacks drive a middle mold and a lower mold to mutually guide and separate along a guide column and a guide hole; the bearing piece arranged on the lower die is sleeved outside each inner rotating rod and enables the inner rotating rod to stand vertically along the axis and rotate on the axis. According to the utility model, stable synchronous die opening and closing can be completed in the demolding process, and the alignment position is arranged between the upper die position and the middle die hole, so that the accuracy of die closing of the upper die position and the middle die hole is improved, and the appearance and quality of a product are improved; in addition, the bottom end of the rotating inner rod of the die is provided with a wear-resistant hard sleeve, so that the service life of the rotating inner rod can be prolonged.

Description

Injection mold for anti-theft rotary bottle cap

Technical Field

The utility model relates to the technical field of mold manufacturing, in particular to an injection mold for an anti-theft rotary bottle cap.

Background

The anti-theft plastic bottle cap comprises an upper cap body and an anti-theft ring, wherein the upper cap body is connected with the anti-theft ring through a plurality of connection points. Go up the lid and have internal thread and bottleneck department threaded connection to seal the bottleneck, the theftproof circle card is at the flange of bottleneck, and when the bottle lid was opened by the rotation, the tie point was broken by the pulling to can judge whether this bottle lid was opened. The bottle cap is widely used for packaging beverages, foods and medicines.

In the existing injection mold for the anti-theft plastic bottle cap, an injection molding cavity is formed by enclosing an upper mold cavity, a lower mold cavity and a thread head serving as a mold core, when the anti-theft plastic bottle cap is manufactured, molten plastic is injected into the injection molding cavity, and after cooling molding, the anti-theft plastic bottle cap can be manufactured through the reverse rotation of the thread head and the mold opening of an upper mold and a lower mold.

In the above-mentioned mold structure, when the mold is opened and closed, a plurality of spring structures are mostly used as the components for opening and popping out of the opened and closed mold and damping of the closed mold, when the mold is used for a long time, the springs may cause elastic deviation among the springs due to metal fatigue, and the side deviation phenomenon is easily caused when the upper mold and the lower mold are closed; in addition, after the rotating inner rod of the injection mold with the thread head is used for a long time, the rotating inner rod may have axial deviation due to long-term use, and particularly, the deviation parts are frequently positioned at the near spiral head of the rotating inner rod and the tail end part of the rotating inner rod; therefore, in the production process, after the injected molten plastic liquid flow is cooled to form the formed anti-theft plastic bottle cap, phenomena such as the phenomenon that the bottle cap is off-glue, and injection molding materials overflow from gaps at fine anti-theft connecting points to form burrs and cloaks can occur; when the screw head is screwed out, excessive abrasion can be generated on the deviation side, and the phenomena of ' strain and ' burn ' are easily generated at the tail position of the thread in the bottle cap particularly; in addition, the tail end of the spiral inner rod is used as an assembly part with the lower die, if the assembly part is worn due to shaft deviation after long-term use, the problem of cooling water leakage caused by gaps in the die can be caused, if water leaks from the assembly part, the water can directly enter the bearing position and the cone position, and the phenomenon of friction and blocking of the rotary inner rod can be caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the background art, the utility model provides an injection mold for an anti-theft rotary bottle cap.

The utility model adopts the following technical scheme: an injection mold for an anti-theft rotary bottle cap comprises an upper mold, a middle mold and a lower mold which are enclosed to form a plurality of injection molding positions, and a guide column and a guide hole which guide the upper mold, the middle mold and the lower mold to open and close; in a die closing state, an upper die position of an upper die, a middle die hole of a middle die and the upper end of a lower die rotating inner rod are mutually enclosed through a threaded head of the middle die hole and led into the upper die position to form an injection molding cavity; at least one pair of synchronous jacks which rotate synchronously are arranged between the upper die and the lower die, thread sleeves are arranged outside the thread ejector rods of the synchronous jacks, and the thread sleeves of the synchronous jacks synchronously rotate and drive the thread ejector rods to rise in a rotating manner, so that the first synchronous jack drives the upper die and the lower die, and the second synchronous jack drives the middle die and the lower die to be guided and separated from each other along the guide columns and the guide holes; the bearing piece arranged on the lower die is sleeved outside each inner rotating rod and enables the inner rotating rod to stand vertically along the axis and rotate on the axis.

Further, the bearing pieces are arranged at least two positions of the upper part, the middle part and the lower part of the rotating inner rod. Preferably, the bearing member is a bearing sleeve.

Furthermore, the bottom end of the rotating inner rod is sleeved with a wear-resistant hard sleeve. Preferably, the wear-resistant hard sleeve is an annular sleeve with hard and wear-resistant functions.

Furthermore, the periphery of the threaded sleeve is provided with threaded sleeve gear faces, and the threaded sleeve gear faces are directly meshed with each other and/or are mutually meshed with the transmission gear in a transmission manner. Specifically, the thread section of the thread sleeve and the thread ejector rod is arranged in the lower die, and the ejector rod head of the thread ejector rod is arranged in the upper die. Preferably, the outer wall of the inner rotary rods is provided with an outer tooth surface, and the outer tooth surface of each inner rotary rod is meshed with at least one thread bushing gear surface, so that the thread bushing gear surface drives the inner rotary rods to rotate synchronously.

Preferably, a guiding position is further disposed between the upper mold position and the middle mold hole. Specifically, the guiding position is a guiding boss which is arranged in the middle die hole in a matched mode and located outside the thread head, and a guiding edge arranged on the upper die position.

The utility model has the advantages that:

1. according to the injection mold, the synchronous top rotating synchronously is additionally arranged, the thread sleeve of the synchronous top synchronously rotates, the rotation of the threads drives the thread ejector rod to do vertical linear motion, the elastic pushing vertical linear motion of a spring part is replaced, the first synchronous top drives the upper mold and the lower mold, the second synchronous top drives the middle mold and the lower mold to maintain mold closing precision when the middle mold and the lower mold are guided and separated along the guide column and the guide hole, and the defect of mold closing offset of the upper mold and the lower mold caused by metal fatigue of a spring is avoided;

2. the injection mold is further provided with a guide position between the upper mold position and the middle mold hole, the guide position is preferably a guide boss which is arranged in the middle mold hole and is positioned outside the screw head, and a guide edge which is arranged on the upper mold position, and the guide position is arranged, so that the injection mold cavity can be further guided, the influence caused by micro-deviation during mold closing can be solved, and the problems of offset, burrs and cloak generated by injection molding products can be further reduced.

3. According to the injection mold, the wear-resistant hard sleeve made of materials such as high-strength wear-resistant ceramics and alloy is arranged at the bottom end of the rotating inner rod in a sleeved mode, so that the tail end of the rotating inner rod can be effectively protected, and the service life of the mold is prolonged; a plurality of bearing pieces that the lower section set up in the upper and middle of the interior pole of cooperation rotation can ensure that each interior pole of rotation stands vertically along the axial lead and the rotation of axle, can effectively avoid bottle lid internal thread tooth tail position to produce "strain", "burn" phenomenon.

Drawings

FIG. 1 is a schematic view of the overall structure of the anti-theft rotary mold of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is an enlarged view of area B of FIG. 1;

FIG. 4 is an enlarged view of area C of FIG. 1;

fig. 5 is an enlarged view of region D in fig. 1.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Examples

An injection mold for an anti-theft rotary bottle cap comprises an upper mold 10 with a plurality of upper mold positions 11, a middle mold 20 with a plurality of middle mold holes 21 and a lower mold 30 with a plurality of rotary inner rods 31, wherein the upper mold positions 11, the middle mold holes 21 and the rotary inner rods 31 are arranged in a matched mode, and a thread head 32 at the upper end of each rotary inner rod 31 is led into the upper mold positions 11 through the middle mold holes 21 in a matched mode, so that the upper mold positions 11, the middle mold holes 21 and the thread head 32 are mutually enclosed to form an injection molding cavity;

the guide post 61 and the guide post 60 are arranged among the upper die 10, the middle die 20 and the lower die 30, at least one pair of first synchronous jacks 51 is arranged between the upper die 10 and the middle die 20, at least one pair of second synchronous jacks 52 is arranged between the lower die 30 and the middle die 20, threaded sleeves (512,522) are arranged outside threaded push rods (511,521) of the first synchronous jacks 51 and the second synchronous jacks 52, and the threaded sleeves (512,522) of the first synchronous jacks 51 and the second synchronous jacks 52 synchronously rotate and drive the threaded push rods (511,521) to lift in a rotating manner, so that the upper die 10 and the middle die 20, and the middle die 20 and the lower die 30 are respectively guided and separated along the guide post 61 and the guide post 60; the lower die 30 is provided with a plurality of inner rotary rods 31 and bearing pieces 4, and the bearing pieces 4 are sleeved outside each inner rotary rod 31 and enable the inner rotary rods 31 to stand vertically along the axis and rotate on the axis.

In the present embodiment, the first synchronizing pin 51 is used as a driving structure for driving the upper die 10 and the lower die 30 to open and close, and the second synchronizing pin 52 is used as a driving structure for driving the middle die 20 and the lower die 30 to open and close, so that the threaded sleeve (512,522) guides the threaded section (514,524) to rotate and move up and down, and the threaded mandril (511,521) can be driven to move linearly up and down, preferably, in the present embodiment, the threaded sleeve gear surface (513,523) is arranged on the periphery of the middle section part of the threaded sleeve (512,522), and the threaded sleeve gear surfaces (513,523) of the threaded mandrils (511,521) are meshed with each other or with the transmission gear, so that the threaded sleeve gear surfaces (513,523) of the threaded sleeves (512,522) of the first and second synchronizing pins (51,52) are driven to rotate synchronously under direct transmission or indirect transmission through the transmission gear, and the threaded mandrils (511,521) are driven to rotate and rise. Specifically, the thread sections (514,524) of the thread sleeve (512,522) and the thread ejector rod (511,521) are arranged in the lower die (30), when an external power mechanism outputs power through a certain thread sleeve gear surface (513,523), the thread sleeves (512,522) can be driven to synchronously rotate, so that the thread sleeve (512,522) drives the thread ejector rod (511,521) to do vertical linear motion, the upper die (10), the middle die (20) and the lower die (30) can perform stable lifting motion along a guide post guide hole, and the lifting adjustment mode of gear transmission and thread transmission can bring a level synchronous lifting effect to each part of the die, so that the defects that the upper die (10), the middle die (20) and the lower die (30) are deviated, opened and closed and are blocked due to different force among springs caused by metal fatigue of the existing die are avoided; preferably, a socket bearing is provided at the upper and lower ends of the socket (512,522) and is mounted in the lower die 30, so that the smoothness and stability of the socket (512,522) during rotation can be further improved.

Further, the above-mentioned bearing members 4 are provided at least at two positions of the upper portion, the middle portion, and the lower portion of the rotation inner lever 31, and preferably, the above-mentioned bearing members 4 are provided at the upper portion and the middle portion of the rotation inner lever 31. More preferably, the bearing member 4 may also be a ball bearing sleeve 41, the ball bearing sleeve 41 is disposed on the middle mold 20 and sleeved outside the rotating inner rod 31, and when the middle mold 20 and the lower mold 30 are separated from each other, the ball bearing sleeve 41 can guide the rotating inner rod 31 to move up and down along the middle mold 20, and maintain the rotating inner rod 31 to be upright along the axis and to rotate on the axis.

Further, a wear-resistant hard sleeve 34 is sleeved at the tail end of the rotating inner rod 31. Preferably, the wear-resistant hard sleeve 34 is a hard annular sleeve having a wear-resistant function. Specifically, the wear-resistant hard sleeve 34 may be made of a hard alloy material with a wear-resistant effect, such as an aluminum alloy, a magnesium alloy, and the like. In the mould opening and closing mould process, the rotary inner rod 31 of the mould needs to be retreated to rotate and is drawn out from the middle mould hole 21, the tail end of the rotary inner rod 31 can be abraded after long-term use, a gap is formed between the tail end of the spiral inner rod and the mounting position, and when the mould is subjected to water cooling operation, penetrating liquid can enter the position of a bearing and a cone along the gap, and the phenomenon of blocking can occur due to oil loss friction. In this embodiment, the wear-resistant hard sleeve 34 is sleeved on the tail end of the rotating inner rod 31, so that the wear resistance of the tail end of the rotating inner rod 31 is further enhanced, the wear caused by long-time use is avoided, the water leakage problem caused by the wear at the position is effectively solved, and the service life of the die is prolonged.

Preferably, the outer surface of the inner rotary rods 31 is provided with an outer tooth surface 33, and the outer tooth surface 33 of each inner rotary rod 31 is meshed with at least one thread-sleeve gear surface (513,523), so that the thread-sleeve gear surface (513,523) is driven to rotate synchronously with each inner rotary rod 31. Through the arrangement scheme, the die is simple in structure, the power output by the external power mechanism can be more fully utilized, and other power mechanisms which independently output power to the rotating inner rod 31 can be reduced.

In a preferred embodiment, the bearing member 4 outside each inner rotary rod 31 may be a ball bearing sleeve 41, the ball bearing sleeve 41 is disposed on the upper outer portion of the inner rotary rod 31 and is coaxially and vertically disposed with the inner rotary rod 31, and the remaining plurality of bearing members 4 are disposed in the middle of the inner rotary rod 31. Through the arrangement of the ball bearing sleeve 41 and the ball bearing sleeve 41, a more stable vertical axis rotation effect can be maintained along the axial lead of each rotating inner rod 31, particularly through the arrangement of the ball bearing sleeve 41, when the thread head 32 screwed with the formed anti-theft rotating bottle cap is rotated and separated in the reverse direction, the phenomena of ' strain and ' burn ' caused by friction of the side eccentric axis rotation of the rotating inner rod 31 on the inner wall of the anti-theft rotating bottle cap and the inner thread, particularly the tail position of the thread can be reduced.

In a preferred embodiment, a guiding position is further disposed between the upper die 11 and the middle die hole 21, which may specifically be a guiding boss 22 disposed in the middle die hole 21 and located outside the screw head 32, and a guiding edge 12 disposed on the upper die 11. In this embodiment, through setting up the guide position, through the guide boss 22 and the guide along 12 further lead positive, it can make the position of moulding plastics that mould position 11, well die orifice 21 constitute after the compound die more accurate, and then can prevent the inclined to one side glue that appears at the rotatory bottle lid position of theftproof in the process of moulding plastics to and the theftproof circle especially theftproof junction department material of moulding plastics from the burr, the cloak problem of clearance overflow formation, thereby effectively improve the quality of rotatory bottle lid of theftproof after the injection moulding.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An injection mold for an anti-theft rotary bottle cap comprises an upper mold, a middle mold and a lower mold which are enclosed to form a plurality of injection molding positions, and a guide column and a guide hole which guide the upper mold, the middle mold and the lower mold to open and close; in a die closing state, an upper die position of an upper die, a middle die hole of a middle die and the upper end of a lower die rotating inner rod are mutually enclosed through a threaded head of the middle die hole and led into the upper die position to form an injection molding cavity; the method is characterized in that: the device comprises an upper die, a lower die, a middle die, a transmission structure, a guide post, a guide hole and a guide hole, wherein at least one pair of first synchronous jacks is arranged between the upper die and the lower die, at least one pair of second synchronous jacks is arranged between the middle die and the lower die, the first synchronous jacks and the second synchronous jacks are in transmission connection through the transmission structure, threaded sleeves are arranged outside threaded ejector rods of the first synchronous jacks and the second synchronous jacks, the transmission structure enables the threaded sleeves of the first synchronous jacks and the second synchronous jacks to synchronously rotate and drive the threaded ejector rods to rotate and rise, the first synchronous jacks drive the upper die and the lower die, and the second synchronous jacks drive the middle die and the lower die to be mutually guided and separated along the guide post and the guide hole; the bearing piece arranged on the lower die is sleeved outside each inner rotating rod and enables the inner rotating rod to stand vertically along the axis and rotate on the axis.

2. The injection mold for an anti-theft rotary bottle cap according to claim 1, wherein: the bearing pieces are arranged at least two positions of the upper part, the middle part and the lower part of the rotary inner rod.

3. The injection mold for an anti-theft rotary bottle cap according to claim 2, wherein: the bearing piece is a bearing sleeve.

4. The injection mold for an anti-theft rotary bottle cap according to claim 1, wherein: the bottom end of the rotary inner rod is sleeved with a wear-resistant hard sleeve.

5. The injection mold for an anti-theft rotary bottle cap according to claim 1, wherein: the transmission structure is a threaded sleeve gear surface and/or a transmission gear arranged on the periphery of the threaded sleeve, and the threaded sleeve gear surfaces are directly meshed with each other and/or mutually engaged with the transmission gear in a transmission way.

6. The injection mold for an anti-theft rotary bottle cap according to claim 5, wherein: and the thread sleeves of the first synchronous top and the second synchronous top and the thread section of the thread ejector rod are arranged in the lower die.

7. The injection mold for an anti-theft rotary bottle cap according to claim 6, wherein: and a threaded sleeve bearing is arranged on the outer side of the threaded sleeve.

8. The injection mold for an anti-theft rotary bottle cap according to claim 5, wherein: the outer wall of the inner rotary rods is provided with an outer tooth surface, and the outer tooth surface of each inner rotary rod is at least meshed with one gear surface of the thread sleeve, so that the gear surface of the thread sleeve drives the gear surface of the thread sleeve to rotate synchronously with each inner rotary rod.

9. The injection mold for an anti-theft rotary bottle cap according to claim 1, wherein: and a guide position is arranged between the upper die position and the middle die hole.

10. The injection mold for an anti-theft rotary bottle cap according to claim 9, wherein: the guiding position is a guiding lug boss which is arranged in the middle die hole in a matching way and is positioned outside the thread head, and a guiding edge which is arranged on the upper die position.

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