Internal thread opening forming mechanism of blow molding barrel

Abstract

The utility model provides a blow molding barrel internal thread opening forming mechanism which comprises a blowing needle mounting base and a blowing needle mechanism rotationally arranged on the blowing needle mounting base. The blowing needle mechanism comprises a rotating joint mounted on the blowing needle mounting seat, a blowing pipe inserted into the rotating joint, a rotating shaft rotatably connected to the blowing needle mounting seat, a driving inner core coaxially fixed on the outer side of the rotating shaft, and a rotating blowing needle rod coaxially fixed on the outer side of the driving inner core; the rotary blowing needle head is fixedly connected to the top of the rotary blowing needle rod, the outer circumferential surface of the rotary blowing needle head is provided with an external thread, the top of the rotary blowing needle head is provided with an air outlet communicated with the blowing pipe, the driving inner core is in heat conduction contact with the rotary shaft, and the outer circumferential surface of the driving inner core is provided with a spiral groove; the rotary blowing needle rod is provided with an upper water inlet and an upper water return hole, the upper end of the spiral groove is connected with the upper water inlet, and the lower end is connected with the upper water return hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to hollow blow molding technical field, specifically is a blow molding barrel inner thread port forming mechanism. BACKGROUND

[0002] Blow molding barrel (abbreviation blow molding barrel) is usually applied to each kind of storage and transportation with large or small plastic barrel, and the product is widely used because of the characteristics of light weight, durable, low price and recycling. Hollow blow molding technology is widely used in various plastic containers with hollow structure. Some plastic barrels have high requirements for the inner diameter of the bottle mouth, and it is not easy to directly blow out the thread of the bottle mouth, so it is necessary to specially add an inner thread port forming mechanism. Generally, the inner thread forming mechanism is combined with a blow needle, and the thread of the bottle mouth is formed on the needle head part of the blow needle. The shaping and cooling of the thread of the bottle mouth are completed during the blow molding process, and then the thread head is slowly rotated out to complete the blow molding. However, the cooling effect of the blow needle is required to be high during the thread port forming process, and the rotation process of the blow needle needs to be stable and reliable, so a blow molding barrel inner thread port forming mechanism is specially provided to solve the problem. SUMMARY

[0003] In view of the above-mentioned problems, the utility model aims to provide a blow molding barrel inner thread port forming mechanism to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0005] The application provides a blow molding barrel inner thread port forming mechanism, which comprises a blow needle mounting seat, a blow needle mechanism rotatably arranged on the blow needle mounting seat, the blow needle mechanism comprising a rotary joint mounted on the blow needle mounting seat, a blow pipe inserted into the rotary joint, a rotary shaft rotatably connected to the blow needle mounting seat, a driving inner core coaxially fixed to the outer side of the rotary shaft, a rotary blow needle rod coaxially fixed to the outer side of the driving inner core, and a rotary blow needle head fixedly connected to the top of the rotary blow needle rod. The outer circumferential surface of the rotary blow needle head is provided with external threads, and the top of the rotary blow needle head is provided with a gas outlet hole communicating with the blow pipe. The driving inner core is in heat-conducting contact with the rotary shaft, and the outer circumferential surface of the driving inner core is provided with a spiral groove. The rotary blow needle rod is provided with an upper water inlet hole and an upper water return hole, and the upper end of the spiral groove is connected to the upper water inlet hole, and the lower end is connected to the upper water return hole.

[0006] In one possible implementation, the rotary joint has a stator and a rotor, the outer side of the rotor is coaxially fixedly connected with a driven gear, and the lower end of the rotary shaft is coaxially fixedly connected with the rotor.

[0007] In a possible implementation, the rotor is provided with a central hole, the upper part of the air blowing pipe is located in the rotating shaft, the lower part of the air blowing pipe is inserted into the central hole and is in heat conduction contact with the rotor, the side wall of the rotor is hollow and is provided with a cooling water flow channel, the rotating shaft is provided with a water inlet hole which is in communication with the upper end of the cooling water flow channel, and the stator of the rotating joint is provided with a water return hole which is in communication with the lower end of the cooling water flow channel.

[0008] In a possible implementation, the air blowing needle mounting base is connected with a motor mounting plate, the lower part of the motor mounting plate is provided with a driving motor, the driving motor is in transmission connection with a driving gear, and the driving gear is in meshing connection with the driven gear.

[0009] In a possible implementation, a self-aligning ball bearing is further arranged between the bottom of the rotating shaft and the air blowing needle mounting base, the self-aligning ball bearing is located above the driven gear, and the inner ring of the self-aligning ball bearing rotates coaxially with the rotating shaft.

[0010] In a possible implementation, a gland is further arranged on the air blowing needle mounting base and covers the self-aligning ball bearing.

[0011] In a possible implementation, a thrust ball bearing is coaxially arranged below the driven gear.

[0012] In a possible implementation, the stator is further provided with an air inlet hole which is in communication with the air blowing pipe.

[0013] In a possible implementation, the rotating air blowing needle rod is provided with a rotating shaft fixing hole which penetrates the rotating air blowing needle rod, the driving inner core and the rotating shaft in the radial direction, and a positioning bolt is movably connected in the rotating shaft fixing hole.

[0014] The utility model discloses the beneficial effect of:

[0015] 1. The driving inner core of the rotating air blowing needle rod is provided with a spiral groove, and water is used for cooling, which greatly improves the contact area of the cooling liquid and the air blowing needle head, and the rotor part of the rotating joint is cooled in addition to the cooling of the driving inner core, so that the upper part and the lower part of the air blowing needle mechanism can be cooled at the same time, and the cooling effect of the air blowing needle is obviously improved.

[0016] 2. The driven gear in the air blowing needle mechanism is provided with a self-aligning ball bearing above and a thrust ball bearing below, so that the air blowing needle is prevented from vibrating and displacing greatly, the stability and the accuracy of the position of the air blowing needle mechanism in the rotating process are ensured, and the service life of the equipment is reduced. DRAWINGS

[0017] Figure 1 A perspective view of a molding mechanism is provided for an embodiment of the present application.

[0018] Figure 2 A front view of a molding mechanism is provided for an embodiment of the present application.

[0019] Figure 3 A perspective view of a molding mechanism is provided for an embodiment of the present application. Figure 2 A sectional view along A-A.

[0020] Figure 4 A perspective view of a molding mechanism is provided for an embodiment of the present application.

[0021] Figure 5 A sectional view of a rotary joint is provided for an embodiment of the present application.

[0022] Wherein: 1, a blow pin mounting seat; 2, a gland; 3, a motor mounting plate; 4, a driving motor; 5, a rotary shaft; 6, an adjusting nut; 7, an upper water inlet hole; 8, an upper water return hole; 9, a cutout ring; 10, a rotary blow pin head; 11, an air outlet hole; 12, a rotary blow pin rod; 13, a lower water inlet hole; 14, a lower water return hole; 15, a rotary joint; 151, a rotor; 152, a stator; 153, a center hole; 154, a cooling water flow channel; 16, an air inlet hole; 17, a driving gear; 18, a driven gear; 19, a thrust ball bearing; 20, a self-aligning ball bearing; 21, a rotary shaft; 22, a driving inner core; 23, a blow pipe; 24, a gear housing; 25, a rotary shaft fixing hole. DETAILED DESCRIPTION

[0023] In order to describe the technical content, structural features, purposes and effects of the present application in detail, the technical solutions in the embodiments of the present application will be described below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth in order to provide a thorough understanding of various exemplary embodiments or implementations of the present application. However, various exemplary embodiments can also be practiced without these specific details or with one or more equivalent arrangements. In addition, various exemplary embodiments can be different, but not necessarily exclusive. For example, the specific shape, structure and characteristics of an exemplary embodiment can be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0024] Furthermore, in this application, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., in a “sidewall”) are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. Spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device can be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly. Additionally, the “above” and “below” positional relationships described in the specification are related to… Figure 1 The vertical positions shown correspond to each other.

[0025] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0026] This application provides a blow molding barrel thread forming mechanism, see [link to relevant documentation]. Figure 1 As shown, the mechanism includes a blow needle mounting base 1, which serves as the main support device for the mechanism. A rotary joint 15 is fixedly mounted below the blow needle mounting base 1, and a blow needle mechanism is rotatably mounted on the upper part of the blow needle mounting base 1. A motor mounting plate 3 and a drive motor 4 are fixedly mounted on the side of the blow needle mounting base 1. The drive motor 4 drives the blow needle mechanism to rotate around the axis of the rotary joint 15 via gears. The blow needle mechanism includes an air blowing pipe 23, a rotating shaft 21 rotatably connected to the blow needle mounting base 1, a drive inner core 22 interference-fitted to the upper part of the rotating shaft 21, a rotating blow needle rod 12 coaxially connected to the outside of the drive inner core 22, and a rotating blow needle head 10 disposed at the top of the rotating blow needle rod 12. The outer circumferential surface of the rotating blow needle head 10 is provided with external threads. The rotating blow needle head 10 is responsible for unscrewing the threads after blow molding at the threaded opening inside the barrel.

[0027] See Figure 5As shown, the rotary joint 15 has a stator 152 and a rotor 151, the upper part of the stator 152 has a convex edge, which is mounted on the blow pin mounting base 1, the lower part of the rotor 151 is rotatably mounted in the stator 152 through a bearing. The bottom of the stator 152 is provided with an air inlet hole 16, the rotor 151 is coaxially installed in the stator 152, and the center of the rotor 151 is provided with a central hole 153 in the axial direction, and the side wall of the rotor 151 is a double-layer hollow structure, and the inside is provided with a cooling water flow channel 154.

[0028] As shown in Figure 2 、 3 The stator 152 of the rotary joint 15 is fixed below the blow pin mounting base 1, the rotor 151 of the rotary joint 15 is columnar and smooth inside the blow pin mounting base 1, the outer side of the rotor 151 is coaxially fixedly connected with a driven gear 18, the lower end of the rotating shaft 21 is coaxially fixedly connected with the rotor 151, the driven gear 18 rotates around the axis of the rotary joint 15, and the driven gear 18 is matched with a driving gear 17 on the side. The driving motor 4 provides power for the rotation of the mechanism, the driving motor 4 drives the driving gear 17 to rotate, the driving gear 17 in turn drives the driven gear 18 to rotate, and then the driven gear 18 drives the blow molding barrel inner thread port forming mechanism to rotate, and the thread port is withdrawn. The above is the power system of the whole mechanism.

[0029] The rotor 151 is provided with a central hole 153, the upper part of the blow pipe 23 is located in the rotating shaft 21, and the lower part of the blow pipe 23 is inserted into the central hole 153. Inside the blow pin mounting base 1, the thrust ball bearing 19 is coaxially arranged below the driven gear 18, the thrust ball bearing 19 is clamped on the bottom plate inside the blow pin mounting base 1 to support the driven gear 18, and provides support for the axial load of the driven gear 18. Inside the blow pin mounting base 1, the thrust ball bearing 20 is coaxially arranged above the driven gear 18, the thrust ball bearing 20 is coaxially arranged on the outside of the rotating shaft 21, which can automatically adjust the central deflection angle of the rotating shaft 21, and ensure the stability of the rotating shaft during rotation.

[0030] The driven gear 18 is coaxially fixedly connected with the rotating shaft 21 and the rotor 151, so that the driven gear 18 can drive the rotating shaft 21 to rotate, the gland 2 is coaxially fixedly installed above the blow pin mounting base 1 and on the rotating shaft 21, which can ensure that the rotating shaft 21 does not separate from the blow pin mounting base 1 during rotation and can also shield the thrust ball bearing 20 inside.

[0031] The middle section of the blowing pipe 23 is located in the rotating shaft 21, the lower end of the blowing pipe 23 is fixed in the rotating joint 15, the blowing pipe 23 outputs gas from the air inlet hole 16 to the air outlet hole 11. Below the rotating joint 15, the side of the blowing pipe 23 is provided with an air inlet hole 16 connected to an external gas source, the air inlet hole 16 is in communication with the blowing pipe 23 to input gas into the blowing pipe 23, the rotating blowing needle head 10 is provided with an air outlet hole 11 which can extend into the plastic bucket, the air outlet hole 11 is in communication with the blowing pipe 23 to continuously input gas into the blowing bucket.

[0032] The upper part of the rotating shaft 21 is coaxially sleeved with the driving inner core 2, and the upper part of the rotating shaft 21 cooperates with the driving inner core 22 to form a rectangular column, after being clamped into the driving inner core 22, the rotating shaft 21 rotates to drive the driving inner core 22 to rotate. The outer side of the driving inner core 22 is a cylindrical double thread structure, the double thread structure includes at least two spiral grooves, and the rotating blowing needle rod 12 is tightly matched with the driving inner core 22. The rotating blowing needle rod 12 is provided with two upper water inlet holes 7 above, the upper water inlet holes 7 are located on opposite sides of the rotating blowing needle rod 12, and the condensate water is transported into the blowing needle mechanism, the upper water inlet holes 7 are communicated to the starting positions of the spiral grooves on the outer surface of the driving inner core 22. The rotating blowing needle rod 12 is also provided with two upper water return holes 8 below, the upper water return holes 8 are located on opposite sides of the rotating blowing needle rod 12 below, and the used condensate water is transported out. The two upper water return holes 8 are respectively communicated to the outer threads on the two sides of the driving inner core 22, and correspond to the upper water inlet holes 7, and the two form an upper water circulation of the blowing needle.

[0033] The lower part of the blowing pipe 23 is inserted into the rotor 151 and is in heat conduction contact with the rotor 151, the side wall of the rotor 151 is hollow and is provided with a cooling water flow channel 154, the rotating shaft 21 is provided with a lower water inlet hole 13 which is communicated with the upper end of the cooling water flow channel 154, the lower water inlet hole 13 is located on opposite sides of the rotating shaft 21 above, and the condensate water is transported into the blowing needle mechanism, the lower water inlet hole 13 is communicated to the cooling water flow channel 154 in the rotating shaft 21 and the rotating joint 15, and the blowing pipe 23 in the rotating shaft 21 and the rotating joint 15 is cooled. The stator 152 of the rotating joint 15 is provided with a lower water return hole 14 which is communicated with the lower end of the cooling water flow channel 154, the lower water return hole 14 is located on opposite sides of the rotating joint 15 below, and the used condensate water is transported out, the lower water inlet hole 13 and the lower water return hole 14 are communicated with each other to form a lower water circulation of the blowing needle.

[0034] The rotating blowing needle rod 12 is coaxially fixedly installed with the rotating blowing needle head 10 above, the rotating blowing needle rod 12 and the rotating blowing needle head 10 are sleeved with the cutout ring 9, the cutout ring 9 mainly plays a sealing effect here, ensures that the blowing process will not occur air leakage phenomenon, and maintains stable air pressure.

[0035] To ensure that the rotating shaft 21 and rotating blow needle rod 12 synchronous rotation, rotating blow needle rod 12 below both sides are provided with through rotating blow needle rod 12, drive inner core 22 and rotating shaft fixing hole 25 of rotating shaft 21, after the bolt is screwed into rotating shaft fixing hole 25, rotating shaft 21 and rotating blow needle rod 12 can be relatively fixed, rotating shaft 21 rotates and will drive rotating blow needle rod 12 to rotate.

[0036] Specific workflow: first, the blank enters the mold, the blow needle is inserted, the gas is blown into the mold through the gas inlet hole 16, the gas pipe 23 and the gas outlet hole 11, and the condensed water is introduced into the upper water inlet hole 26 and the lower water inlet hole 24 at the same time, so that the gas in the blow needle and the gas pipe 23 is cooled, and the mold is quickly formed. After the forming process is completed, the driving motor 4 drives the driving gear 17 to rotate, and then the driven gear 18 rotates, and the driven gear 18 drives the coaxially fixed rotating shaft 21, the rotating blow needle rod 12, the drive inner core 22 and the rotating blow needle head 10 to rotate, and the blow needle is slowly rotated out of the bottle mouth, and the whole blow molding barrel threaded mouth forming process is completed.

[0037] The utility model improves the contact area of cooling liquid and blow needle, increases the upper and lower layered cooling system, obviously promotes the cooling effect of blow needle, and avoids the vibration displacement of blow needle, guarantees the stability and the accuracy of position of blow needle in the rotating process, reduces the friction and improves the service life of equipment.

[0038] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and the scope of protection of the present application is defined by the appended claims, the specification and their equivalents.

Claims

1. A blow-molded pail finish thread forming mechanism characterized by: The utility model provides a kind of blow needle mounting seat (1), the blow needle mechanism of being rotatably arranged on the blow needle mounting seat (1), the blow needle mechanism includes the rotary joint (15) being mounted on blow needle mounting seat (1), the blow pipe (23) being inserted in the rotary joint (15), the rotary shaft (21) being rotatably connected on blow needle mounting seat (1), coaxially fixed driving inner core (22) on the outside of rotary shaft (21), coaxially fixed rotary blow needle stem (12) on the outside of driving inner core (22), fixedly connected rotary blow needle head (10) on the top of the rotary blow needle stem (12), the outer circumferential surface of the rotary blow needle head (10) is provided with external thread, the top of the rotary blow needle head (10) is provided with the air outlet hole (11) that communicates with the blow pipe (23), the driving inner core (22) is in thermal contact with the rotary shaft (21), and the outer circumferential surface of the driving inner core (22) is provided with spiral groove, the rotary blow needle stem (12) is provided with upper water inlet hole (7) and upper water return hole (8), the upper end of the spiral groove is connected with the upper water inlet hole (7), and the lower end is connected with the upper water return hole (8).

2. A thread forming mechanism for blow molded pails according to claim 1 wherein: The rotary joint (15) has a stator (152) and a rotor (151), the outside of the rotor (151) is coaxially fixedly connected with a driven gear (18), and the lower end of the rotary shaft (21) is coaxially fixedly connected with the rotor (151).

3. A thread forming mechanism for blow molded pails according to claim 2 wherein: The rotor (151) is provided with a central hole (153), the upper part of the blow pipe (23) is located in the rotary shaft (21), the lower part of the blow pipe (23) is inserted into the central hole (153) and is in thermal contact with the rotor (151), the side wall of the rotor (151) is hollow and is provided with a cooling water flow channel (154), the rotary shaft (21) is provided with a lower water inlet hole (13) communicating with the upper end of the cooling water flow channel (154), and the stator (152) of the rotary joint (15) is provided with a lower water return hole (14) communicating with the lower end of the cooling water flow channel (154).

4. A thread forming mechanism for blow molded pails according to claim 2 wherein: The side of the blow needle mounting seat (1) is connected with a motor mounting plate (3), a driving motor (4) is mounted below the motor mounting plate (3), the driving motor (4) is in transmission connection with a driving gear (17), and the driving gear (17) is in meshing connection with the driven gear (18).

5. A thread forming mechanism for blow molded pails according to claim 2 wherein: A self-aligning ball bearing (20) is further arranged between the bottom of the rotary shaft (21) and the blow needle mounting seat (1), the self-aligning ball bearing (20) is located above the driven gear (18), and the inner ring thereof is coaxially rotatable with the rotary shaft (21).

6. A thread forming mechanism for blow molded pails according to claim 5 wherein: A gland (2) is further mounted on the blow needle mounting seat (1), and the gland covers the self-aligning ball bearing (20).

7. A threaded spout forming mechanism for blow molded pails according to claim 2 wherein: A thrust ball bearing (19) is coaxially mounted below the driven gear (18).

8. A thread forming mechanism for blow molded pails according to claim 2 wherein: An air inlet hole (16) communicating with the blow pipe (23) is further arranged on the stator (152).

9. A thread forming mechanism for blow molded pails according to claim 1 wherein: The rotating blow pin rod (12) is provided with a rotating shaft fixing hole (25) penetrating the rotating blow pin rod (12), the driving inner core (22) and the rotating shaft (21) in the radial direction, and the positioning bolt is movably connected in the rotating shaft fixing hole (25).

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