CN215750700U - Neck mold mechanism of blow molding machine - Google Patents
Neck mold mechanism of blow molding machine Download PDFInfo
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- CN215750700U CN215750700U CN202122050570.XU CN202122050570U CN215750700U CN 215750700 U CN215750700 U CN 215750700U CN 202122050570 U CN202122050570 U CN 202122050570U CN 215750700 U CN215750700 U CN 215750700U
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Abstract
The utility model discloses a neck mold mechanism of a blow molding machine, and belongs to the technical field of blow molding machines. Including interior blow gun, interior blow gun outside is equipped with outer blow gun, interior blow gun below is equipped with interior nozzle, interior nozzle include top flange and with top flange body coupling's the portion of inserting, the portion of inserting is equipped with airflow channel, airflow channel with the through-hole intercommunication forms cylindrical recess between portion of inserting lower extreme and the outer blow gun internal surface. The utility model provides a neck ring mold mechanism of a blow molding machine, which consists of an inner blow nozzle, an inner nozzle and an outer blow nozzle, wherein a cylindrical groove is formed between the inner nozzle and the outer blow nozzle, a circular groove is formed at the bottom of the outer blow nozzle, a support ring of a preformed piece is sealed by a first surface and a second surface of the circular groove, the neck of the preformed piece is limited by the cylindrical groove, the stop position of the neck ring mold mechanism is kept constant, and the stable air sealing capability during the air blowing operation is ensured.
Description
Technical Field
The utility model relates to a neck mold mechanism of a blow molding machine, and belongs to the technical field of blow molding machines.
Background
A blow molding machine is a plastic processing machine. After the liquid plastic is ejected, the plastic is blown into a shaped cavity by the force of the wind blowing out of the machine, which is called a blow molding machine, to produce the product. Broadly speaking, bottle blowing machines include blow molding machines, injection blow molding machines, and the more commonly used two-step bottle blowing machines.
The neck ring mechanism, i.e. the blowing nozzle, of the blow molding machine is in direct contact with the blowing opening of the preform, and the preform, e.g. a preform of a plastic bottle, is blown by the blowing mechanism and finally molded.
In the existing neck ring mold mechanism of the blow molding machine, the sealing performance between the air outlet of the neck ring mold mechanism and the preformed piece (bottle blank) is poor during blowing, the blowing is easy to leak laterally, and the preformed piece (bottle blank) is easy to form defects during blowing.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-described technical problems, an object of the present invention is to provide a blow molding machine die mechanism capable of ensuring that the stop position of a blow nozzle is kept constant, ensuring stable air-sealing ability at the time of blowing operation, and not damaging the support ring portion of a preform even without using an elastic member.
The technical problem to be solved by the utility model is realized by adopting the following technical scheme:
a neck mold mechanism of a blow molding machine comprises an outer blow nozzle, an inner nozzle, bushings and a stretching rod, wherein the outer blow nozzle is arranged outside the inner blow nozzle, an air blowing flow channel is arranged inside the inner blow nozzle, the bushings are respectively arranged on two sides inside the inner blow nozzle, a central hole is formed between the bushings, a through hole is formed inside the bushing, the through hole is communicated with the air blowing flow channel, and the stretching rod is inserted into the central hole;
an inner nozzle is arranged below the inner blowing nozzle, the inner nozzle comprises a top end flange and an inserting part integrally connected with the top end flange, the inserting part is provided with an airflow channel, the airflow channel is communicated with the through hole, a cylindrical groove is formed between the lower end of the inserting part and the inner surface of the outer blowing nozzle, and the top of the cylindrical groove is a first surface;
the lower end of the outer blowing nozzle is provided with a circular groove, the top of the circular groove is a second surface, and the bottom of the circular groove is a third surface.
As a preferred example, a pressure ring is arranged between the inner blow nozzle and the inner nozzle.
As a preferred example, an air passage is provided on the insertion portion of the inner nozzle, the air passage communicating with the cylindrical recess.
As a preferable example, a first O-shaped sealing ring is arranged between the inner blowing nozzle and the outer blowing nozzle.
As a preferred example, a second O-shaped sealing ring is arranged between the top of the inner nozzle and the bottom of the pressure receiving ring.
The utility model has the beneficial effects that:
(1) the utility model provides a neck ring mold mechanism of a blow molding machine, which consists of an inner blow nozzle, an inner nozzle and an outer blow nozzle, wherein a cylindrical groove is formed between the inner nozzle and the outer blow nozzle, a circular groove is formed at the bottom of the outer blow nozzle, a support ring of a preformed piece is sealed by a first surface and a second surface of the circular groove, the neck of the preformed piece is limited by the cylindrical groove, the stop position of the neck ring mold mechanism is kept constant, and the stability of air sealing capability during blowing work is ensured;
(2) according to the utility model, the compression ring is arranged between the inner blowing nozzle and the inner nozzle, and the compression ring can buffer the impact force between the inner blowing nozzle and the inner nozzle when the inner blowing nozzle descends, so that the neck of the preformed piece is prevented from being suddenly stressed and damaged due to strong impact on the inner nozzle;
(3) according to the utility model, the air channel is arranged between the inner surface of the outer blowing nozzle and the inner nozzle, so that the pressure inside and outside the neck is ensured to be equal, and the outward expansion and deformation of the neck are limited.
Drawings
FIG. 1 is a cross-sectional view of a blow molding machine die mechanism of the present invention in a standby state;
FIG. 2 is a cross-sectional view of the descending state of the blow molding machine die mechanism of the present invention;
FIG. 3 is a cross-sectional view of the blow-molding machine die mechanism of the present invention in a state where the neck of the preform is sealed;
fig. 4 is an enlarged partial schematic view of the sealing principle of the die mechanism of fig. 3.
In the figure: 1. a mouth mold mechanism; 10. a stretch rod; 101. a tip portion; 11. an inner blowing nozzle; 110. an air blowing flow passage; 111. an external thread; 112. a first step portion; 12. a bushing; 121. a through hole; 122. a central bore; 13. an outer blowing nozzle; 131. a second step portion; 132. a third step portion; 133. an internal thread; 14. a compression ring; 15. an inner nozzle; 151. a top end flange; 152. an insertion portion; 153. an air flow channel; 154. an air passage; 16. a first O-ring seal; 17. a second O-ring seal; 18. a cylindrical recess; 181. a third surface; 19. a circular groove; 191. a first surface; 192. a second surface; 2. a preform; 20. a neck portion; 201. a threaded portion; 202. a support ring; 203. an end face; 21. a main body portion; 22. a bottom; 3. a split mold; 30. a left half mold; 31. a right half mold; 32. a top surface; 33. a left cavity surface; 34. a right cavity surface; 35. and (5) closing the mold and blowing the cavity.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the utility model easy to understand, the utility model is further described with reference to the specific drawings.
Example (b):
as shown in fig. 1 to 3, in a die mechanism 1 of a blow molding machine according to an embodiment of the present invention, preforms 2 blow-molded in fig. 1 to 3 are arranged in a pair of split molds 3 having a mold clamping blow cavity 35, and the split molds 3 include a left half mold 30 and a right half mold 31.
As shown in fig. 1, the preform 2 has a neck portion 20, a body portion 21 and a bottom portion 22, wherein the neck portion 20 is formed with a threaded portion 201 and a flange portion, which is a support ring 202 in this embodiment, an open end of the neck portion 20 is referred to as an end face 203, and the preform 2 has the support ring 202 on a top face 32 of a left mold half 30 and a right mold half 31 which are separated by a pair of mold clamping blow cavities 35.
As shown in fig. 1, the split mold 3 further includes left and right cavity surfaces 33 and 34 and a mold clamping blow cavity 35, the left and right cavity surfaces 33 and 34 corresponding to the outer shapes of the main body and the bottom portion 22 of the hollow container blow-molded from the preform 2.
Fig. 1 to 3 show the die mechanism 1 that introduces blow air from the neck portion 20 of the preform 2 into the preform 2, in fig. 1, the die mechanism 1 waits above the preform 2, in fig. 2, the die mechanism 1 has started to descend, and in fig. 3, the die mechanism 1 completely seals the neck portion 20 of the preform 2.
As shown in fig. 1 to 3, the die mechanism 1 includes a stretching rod 10 that is movable and has a guiding function, the stretching rod 10 has a tip portion 101 at the bottom end, the tip portion 101 is capable of contacting the inner surface of the bottom portion 22 of the preform 2, and the stretching rod 10 serves to center the preform 2 and stretch the preform 2 on the vertical axis during blow molding.
The mouthpiece mechanism 1 further comprises an inner blowing nozzle 11, the inner blowing nozzle 11 is driven by a driving mechanism such as an air cylinder which reciprocates up and down, and a tubular outer blowing nozzle 13 which can be arranged around the neck portion 20 is arranged on the periphery of the inner blowing nozzle 11.
The inner blow nozzle 11 includes an air flow passage 110, and as shown in fig. 1, a bush 12 for sliding the stretch rod 10 is provided in the inner blow nozzle 11, wherein the bush 12 has a double tube structure, a central hole 122 is formed between the two bushes 12, the stretch rod 10 is guided to slide by the central hole 122, and a through hole 121 provided in the bush 12 is also used as an air flow passage.
As shown in fig. 1, the outer mouthpiece 13 connected to the inner mouthpiece 11 is provided with an internal thread 133 at an upper end portion, the inner mouthpiece 11 is provided with an external thread 111, and the internal thread 133 is screwed with the external thread 111. A pressure receiving ring 14 is further provided below the bushing 12, the pressure receiving ring 14 is used to buffer the impact force between the inner nozzle 15 and the inner nozzle 11 when the inner nozzle 11 descends, and when the die mechanism 1 is assembled, the bushing 12 and the pressure receiving ring 14 are inserted into the inner nozzle 11, and then the outer nozzle 13 is sleeved outside the inner nozzle 15 and screwed down. The top end of the bushing 12 abuts against the first step portion 112 inside the inner blowing nozzle 11, and the bottom end of the pressure receiving ring 14 abuts against the second step portion 131 inside the outer blowing nozzle 13, in this embodiment, the inner nozzle 15 is arranged below the inner blowing nozzle 11, the inner nozzle 15 includes a top end flange 151 and an insertion portion 152, the top end flange 151 of the inner nozzle 15 is fixed between the pressure receiving ring 14 and the third step portion 132 of the outer blowing nozzle 13, the insertion portion 152 is inserted between the third surface 181 and the first surface 191, the insertion portion 152 is provided with an air flow channel 153, and the air flow channel 153 is communicated with the pressure receiving ring 14, the through hole 121 of the bushing 12, and the blowing flow channel 110.
As shown in fig. 1, a first O-ring 16 is provided between the outer surface of the inner mouthpiece 11 and the inner surface of the outer mouthpiece 13, and a second O-ring 17 is provided between the inner nozzle 15 and the pressure receiving ring 14.
As shown in fig. 1, fig. 3 and fig. 4, wherein fig. 4 is a partial enlarged view of fig. 3, the outer nozzle is pressed against the support ring 202 of the preform 2, the bottom 22 of the outer nozzle 13 is provided with an annular groove 19 in the circumferential direction, the upper surface of the annular groove 19 is a first surface 191, the lower surface of the annular groove 19, that is, the outermost surface of the outer nozzle, is a second surface 192, the first surface 191 is pressed against the upper surface of the support ring 202, and the radially outer side of the second surface 192 is in contact with the upper surface of the split mold 3.
A cylindrical groove 18 is also formed between the lower end of the inner blow nozzle 11 and the lower end of the outer blow nozzle 13 as a neck 20 groove, the neck 20 of the preform 2 is inserted into the neck 20 groove when the die mechanism 1 is operated, a third surface 181 is provided on the top of the cylindrical groove 18, and the top surface 32 of the neck 20 of the preform 2 abuts on the third surface 181. The depth of the annular groove 19 and the cylindrical groove 18 can be changed according to the sizes of the support ring 202 and the neck 20 of the preform 2, and the annular groove 19 and the cylindrical groove 18 with different depth sizes are set for preforms 2 with different specifications.
In this embodiment, the insertion portion 152 of the inner nozzle 15 is further provided with an air passage 154, and the air passage 154 is communicated with the cylindrical recess 18, so that even if the end surface 203 of the neck portion 20 is hermetically sealed, the pressure inside and outside the neck portion 20 is balanced by the air passage 154, and the neck portion 20 is prevented from being blown open by the inflation of the blow air.
The support ring 202 of the preform 2 is sealed with the first surface 191 and the second surface 192 of the annular groove 19, the neck portion 20 of the preform 2 is restrained by the cylindrical groove 18, the stop position of the die mechanism 1 is kept constant, the air-tightness at the time of blowing operation is ensured to be stable, and the support ring 202 portion of the preform 2 is not damaged even without using an elastic member, and in addition, the inner surface of the outer blow nozzle 13 can restrain the neck portion 20 from being deformed by expansion outward.
The working principle is as follows:
(1) installing the mouth mold mechanism 1, according to the neck 20 of the preformed piece 2 and the size specification of the support ring 202, selecting the proper inner blow nozzle 11 and outer blow nozzle 13 to combine, during installation, firstly, the upper end of the inner nozzle 15 is abutted against the third step part 132 of the outer blow nozzle 13, the lower end of the inner blow nozzle 11 is inserted into the lower end of the outer blow nozzle 13, after the second O-shaped seal ring 17 is installed in the groove above the inner nozzle 15, the compression ring 14 is pressed above the inner nozzle 15, then the two bushings 12 are inserted into the inner blow nozzle 11 and abutted against the compression ring 14, finally, the outer blow nozzle 13 and the inner blow nozzle 11 are fixed in a threaded manner, and the inner blow nozzle 11 is sleeved with the first O-shaped seal ring 16.
(2) The preform 2 is blown and the die mechanism 1 is moved downwards by means of a pneumatic cylinder, as shown in figure 2, when the neck 20 of the preform 2 is partially inserted into the cylindrical recess 18, the stretch rod 10 moves downwards, until it comes into contact with the bottom 22 of the preform 2, the die mechanism 1 then continues downwards until the neck 20 is fully inserted in the cylindrical recess 18, while the support ring 202 is sealed by the first 191 and second 192 surfaces of the annular recess 19, then, the air blowing mechanism is operated, the air is blown through the through-holes 121 of the liner 12 via the air blowing flow path 110, after passing through the pressure ring 14 and finally entering the interior of the body of the preform 2 from the air flow channel 153 between the stretch rod 10 and the inner nozzle 15, the body and bottom 22 of the preform 2 expand and gradually fill the entire mold clamping blow cavity 35 until they completely contact the left and right cavity surfaces 33, 34 and are finally formed.
The blow molding machine die mechanism 1 provided by the utility model has the following beneficial effects:
A compression ring 14 is arranged between the inner blow nozzle 11 and the inner nozzle 15, and the compression ring 14 can buffer the impact force between the inner blow nozzle 11 and the inner nozzle 15 when the inner blow nozzle 11 descends, so that the neck 20 of the preformed piece 2 is prevented from being suddenly stressed and damaged due to strong impact on the inner nozzle 15.
An air channel 154 is provided between the inner surface of the outer mouthpiece 13 and the inner nozzle 15 to ensure equal internal and external pressure in the neck 20 and to limit outward bulging of the neck 20.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. A neck mold mechanism of a blow molding machine is characterized by comprising an outer blow nozzle, an inner nozzle, a bushing and a stretching rod, wherein the outer blow nozzle is arranged outside the inner blow nozzle, an air blowing flow channel is arranged inside the inner blow nozzle, the bushings are respectively arranged on two sides inside the inner blow nozzle, a central hole is formed between the bushings, a through hole is formed inside the bushing, the through hole is communicated with the air blowing flow channel, and the stretching rod is inserted into the central hole;
an inner nozzle is arranged below the inner blowing nozzle, the inner nozzle comprises a top end flange and an inserting part integrally connected with the top end flange, the inserting part is provided with an airflow channel, the airflow channel is communicated with the through hole, a cylindrical groove is formed between the lower end of the inserting part and the inner surface of the outer blowing nozzle, and the top of the cylindrical groove is a first surface;
the lower end of the outer blowing nozzle is provided with a circular groove, the top of the circular groove is a second surface, and the bottom of the circular groove is a third surface.
2. The blow mold machine die mechanism according to claim 1, wherein a pressure ring is provided between said inner blowing nozzle and said inner nozzle.
3. The die mechanism of claim 1, wherein said inner nozzle insert portion is provided with an air passage, said air passage communicating with said cylindrical recess.
4. The blow mold machine die mechanism according to claim 1, wherein a first O-ring seal is disposed between said inner and outer blow nozzles.
5. The die mechanism of claim 2, wherein a second O-ring seal is disposed between the top of said inner nozzle and the bottom of said pressure ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122050570.XU CN215750700U (en) | 2021-08-27 | 2021-08-27 | Neck mold mechanism of blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122050570.XU CN215750700U (en) | 2021-08-27 | 2021-08-27 | Neck mold mechanism of blow molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215750700U true CN215750700U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122050570.XU Active CN215750700U (en) | 2021-08-27 | 2021-08-27 | Neck mold mechanism of blow molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215750700U (en) |
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2021
- 2021-08-27 CN CN202122050570.XU patent/CN215750700U/en active Active
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