Bottom die assembly and bottle blowing die

Abstract

The bottom die assembly comprises a bottom die and a positioning ring, the bottom die is provided with a bottom die forming cavity and a first bottom die exhaust structure communicated with the bottom die forming cavity and the outer wall of the bottom die, the positioning ring is provided with a first positioning ring exhaust structure communicated with the inner wall and the outer wall of the positioning ring, and the inner wall of the positioning ring is arranged on the outer wall of the bottom die in a sleeving mode. And the first bottom die exhaust structure is communicated with the first positioning ring exhaust structure. The bottle blowing mold not only comprises the bottom mold assembly, but also comprises a mold cavity assembly. The corresponding exhaust structures are arranged in the positioning ring and the bottom die, so that the positioning ring does not affect exhaust of the bottom die, and the quality of a formed container is ensured.

Description

Technical Field

[0001] This invention relates to the field of blow molding technology, specifically to a bottom mold assembly and a blow molding die. Background Technology

[0002] For blow molding molds, the venting performance of the mold has a decisive impact on the quality of the product. During blow molding, a high-temperature preform is placed in a closed mold, and high-pressure gas is rapidly injected to make it adhere to the mold cavity wall. If the air originally in the mold cavity or the gas released by the preform due to heat cannot be vented in time, it will lead to local air resistance, resulting in defects such as incomplete bottle filling, uneven wall thickness distribution, surface depressions, stress concentration, or even bottle explosion.

[0003] In addition, in existing blow molding dies, the bottom mold is connected to the bottom mold connecting mechanism. When the blow molding die is closed, the bottom mold connecting mechanism cooperates with the mold cavity to achieve the alignment of the bottom mold and the mold cavity. After multiple opening and closing of the mold in continuous production, the matching and positioning structure between the bottom mold connecting mechanism and the mold cavity will wear out, which will cause the bottom mold to easily shift when the mold is closed and fail to be accurately aligned with the mold cavity. This will lead to problems such as bottle bottom eccentricity and uneven bottle wall thickness in the molded container.

[0004] When blow molding equipment ages, it becomes impossible to accurately control the position of the bottom mold. This causes the gap between the bottom mold and the mold cavity to become interference during mold closing, resulting in collisions between the bottom mold and the mold cavity. These collisions can damage the bottom mold and / or the mold cavity, leading to abnormal parting lines on the molded container, such as thickening or flash. Summary of the Invention

[0005] To address the technical problems existing in the prior art, the purpose of this invention is to provide a bottom mold assembly. On the one hand, by setting corresponding venting structures in the positioning ring and the bottom mold, the positioning ring will not affect the venting of the bottom mold, which helps to ensure the quality of the molded container. On the other hand, when the bottom mold position is abnormal in the blow molding equipment, the bottom mold will be prevented from colliding with the mold cavity, thus preventing damage to the bottom mold and / or the mold cavity.

[0006] Another object of the present invention is to provide a blow molding die.

[0007] To achieve at least some of the above objectives, the present invention adopts the following technical solution: a bottom mold assembly, including a bottom mold and a positioning ring, the bottom mold having a bottom mold forming cavity and a first bottom mold venting structure connecting the bottom mold forming cavity and the outer wall of the bottom mold, the positioning ring having a first positioning ring venting structure connecting its inner and outer walls, the inner wall of the positioning ring being fitted onto the outer wall of the bottom mold, and the first bottom mold venting structure being connected to the first positioning ring venting structure.

[0008] As a preferred embodiment, the first bottom mold venting structure comprises multiple first bottom mold venting channels connecting the bottom mold forming cavity and the outer wall of the bottom mold; the first positioning ring venting structure includes venting grooves arranged circumferentially on the inner wall of the positioning ring and multiple first positioning ring venting channels connecting the venting grooves and the outer wall of the positioning ring; an venting cavity is formed between the venting grooves and the outer wall of the bottom mold, and the first bottom mold venting channels are connected to the venting cavity.

[0009] As a preferred embodiment, the first bottom mold venting structure includes a venting groove arranged circumferentially on the outer wall of the bottom mold and multiple first bottom mold venting channels connecting the bottom mold forming cavity and the venting groove; the first positioning ring venting structure consists of multiple first positioning ring venting channels connecting the inner and outer walls of the positioning ring; an venting cavity is formed between the venting groove and the inner wall of the positioning ring, and the first positioning ring venting channels are connected to the venting cavity.

[0010] As a preferred embodiment, the bottom mold assembly further includes a bottom mold connecting mechanism, the bottom of which is connected to the bottom mold connecting mechanism. The bottom mold connecting mechanism includes a bottom mold sealing plate and a bottom mold sleeve fitted onto the bottom mold sealing plate. The bottom surface of the bottom mold and the outer wall are connected by a first bottom mold step that surrounds the mold in the circumferential direction. The bottom mold sealing plate supports the bottom mold, and the bottom mold sleeve supports the top surface of the first bottom mold step and the bottom surface of the positioning ring. The inner wall of the bottom mold sleeve cooperates with the circumferential surface of the first bottom mold step to radially limit the bottom mold.

[0011] As a preferred embodiment, the first bottom mold step has a bottom mold step recess; the bottom mold has multiple second bottom mold venting channels connecting the bottom mold forming cavity and the bottom mold step recess; a venting space is formed between the bottom mold step recess and the bottom mold sleeve, and the second bottom mold venting channels are connected to the venting space; the bottom surface of the positioning ring has a positioning ring venting groove connecting its inner and outer walls, and a second positioning ring venting channel is formed between the positioning ring venting groove and the bottom mold sleeve; the venting space is connected to the outer wall of the positioning ring through the second positioning ring venting channel.

[0012] As a preferred embodiment, a second bottom mold step is provided between the bottom surface of the bottom mold and the first bottom mold step, which is circumferentially surrounding the bottom mold step; the bottom mold is provided with multiple third bottom mold venting channels that connect the bottom mold forming cavity and the second bottom mold step; a gap is left between the top surface of the second bottom mold step and the bottom mold sealing plate, so as to form a venting transition space connected to the venting space between the second bottom mold step, the bottom mold sealing plate and the bottom mold sleeve; the third bottom mold venting channel is connected to the venting transition space.

[0013] A blow molding die includes not only the aforementioned bottom mold assembly but also a mold cavity assembly. The mold cavity assembly has a mold cavity forming cavity and a bottom mold mounting position. The bottom mold mounting position is located below and connected to the mold cavity forming cavity, and has a mounting mating surface corresponding to the top surface of the bottom mold. During mold closing, a bottom mold connecting mechanism installs the bottom mold and a positioning ring into the bottom mold mounting position. The outer peripheral wall of the positioning ring mates with the inner wall of the bottom mold mounting position to align the bottom mold and the mold cavity assembly. The top surface of the positioning ring mates with the mounting mating surface to buffer the impact between the bottom mold and the mold cavity assembly. After mold closing, the bottom mold forming cavity and the mold cavity forming cavity together form the mold forming cavity.

[0014] As a preferred option, the top surface of the positioning ring is 0.1mm-0.5mm higher than the top surface of the bottom mold; after the mold is closed, the positioning ring is compressed, so that the top surface of the bottom mold can mate with the installation mating surface.

[0015] As a preferred embodiment, the mold cavity assembly includes two opposing half-mold cavity components, each half-mold cavity component including a half-mold cavity and a half-clamping opening that fits and connects to the lower part of the half-mold cavity; the interior of the half-mold cavity is provided with a half-mold cavity forming cavity and a half-mold cavity mounting cavity, the half-mold cavity mounting cavity being located below the half-mold cavity forming cavity and communicating with the half-mold cavity forming cavity; the interior of the half-clamping opening is provided with a half-clamping opening mounting cavity; when the mold is closed, the two half-mold cavities combine to form a mold cavity, the two half-clamping openings combine to form a lower clamping opening, the mold cavity and the lower clamping opening combine to form a mold cavity assembly, and the two half-mold cavity forming cavities combine to form a mold cavity forming cavity, the two half-mold cavity mounting cavities combine to form a mold cavity mounting cavity, the two half-clamping opening mounting cavities combine to form a lower clamping opening mounting cavity, the mold cavity mounting cavity and the lower clamping opening mounting cavity together form a bottom mold mounting position.

[0016] As a preferred embodiment, after mold closing, the inner diameter of the lower clamping opening matches the outer diameter of the positioning ring, the inner diameter of the mold cavity mounting cavity is larger than the outer diameter of the positioning ring, and there is a gap between the outer peripheral wall of the positioning ring and the inner wall of the mold cavity mounting cavity.

[0017] In summary, the present invention has the following advantages: The positioning ring fitted on the outer wall of the bottom mold not only achieves precise alignment and buffering, but also has an exhaust structure inside the positioning ring. This structure is connected to the exhaust structure on the bottom mold, forming a complete exhaust path, which will not affect the exhaust of the bottom mold. In the mold-closed state, the internal gas can be smoothly discharged to the outside of the mold, which helps to ensure the quality of the molded container. Furthermore, in the event of an abnormal bottom mold position in the blow molding equipment, it avoids collisions between the bottom mold and the mold cavity, preventing damage to the bottom mold and / or the mold cavity, while further ensuring the quality of the molded container. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the bottom mold assembly.

[0019] Figure 2 This is a top view of the bottom mold.

[0020] Figure 3 This is a side view of the bottom mold.

[0021] Figure 4 This is a schematic diagram of the cross-section of the positioning ring.

[0022] Figure 5 This is a schematic diagram showing the layout of the bottom formwork water sealing plate and its inlet and outlet channels.

[0023] Figure 6 This is a schematic diagram of the cross-section of the bottom mold sleeve.

[0024] Figure 7 This is a top view of the bottom mold sleeve.

[0025] Figure 8 This is a schematic diagram of the blow molding die after it has been closed.

[0026] Figure 9 This is a schematic diagram of the membrane cavity assembly.

[0027] Figure 10 This is a schematic diagram of the cross-section of the lower clamp.

[0028] Figure 11 This is a top view of the lower clamp.

[0029] 1 is the mold cavity assembly, and 2 is the bottom mold assembly.

[0030] 11 is the mold cavity forming cavity, 12 is the bottom mold mounting position, 13 is the mold cavity, and 14 is the lower clamping opening.

[0031] 131 is the mold cavity mounting cavity, and 141 is the lower clamp mounting cavity.

[0032] 21 is the bottom mold, 22 is the positioning ring, and 23 is the bottom mold connecting mechanism.

[0033] 211 is the bottom mold forming cavity, 212 is the connecting recess, 213 is the first bottom mold venting channel, 214 is the bottom mold cooling groove, 215 is the first bottom mold step, 216 is the second bottom mold step, 217 is the second bottom mold venting channel, 218 is the third bottom mold venting channel, and 2151 is the bottom mold step recess.

[0034] 221 is a connecting protrusion, 222 is an exhaust groove, 223 is an exhaust channel for the first positioning ring, and 224 is an exhaust groove for the positioning ring.

[0035] 231 is the bottom mold sealing plate, 232 is the bottom mold sleeve, 2311 is the water inlet channel, and 2312 is the water outlet channel.

[0036] S1 is the venting chamber, S2 is the venting transition space, S3 is the venting space, G1 is the venting gap, and G2 is the mold closing gap. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] Example 1 like Figure 1-7 As shown, a bottom mold assembly 2 includes a bottom mold 21 and a positioning ring 22. The bottom mold 21 is provided with a bottom mold forming cavity 211 and a first bottom mold venting structure connecting the bottom mold forming cavity 211 and the outer wall of the bottom mold 21. The positioning ring 22 is provided with a first positioning ring venting structure connecting its inner and outer walls. The inner wall of the positioning ring 22 is sleeved on the outer wall of the bottom mold 21. The first bottom mold venting structure is connected to the first positioning ring venting structure.

[0039] The outer wall of the bottom mold 21 is provided with a connecting recess 212 that surrounds the circumference, and the inner wall of the positioning ring 22 is provided with a connecting protrusion 221 that surrounds the circumference. The positioning ring 22 is sleeved on the outer wall of the bottom mold 21 based on the cooperation between the connecting protrusion 221 and the connecting recess 212.

[0040] Specifically, the first bottom mold venting structure consists of multiple first bottom mold venting channels 213 connecting the bottom mold forming cavity 211 and the outer wall of the bottom mold 21; the first positioning ring venting structure includes a venting groove 222 circumferentially disposed on the inner wall of the positioning ring 22 and multiple first positioning ring venting channels 223 connecting the venting groove 222 and the outer wall of the positioning ring 22; an venting cavity S1 is formed between the venting groove 222 and the outer wall of the bottom mold 21, and the first bottom mold venting channels 213 are connected to the venting cavity S1.

[0041] Specifically, the bottom mold assembly 2 also includes a bottom mold connecting mechanism 23. The bottom of the bottom mold 21 is connected to the bottom mold connecting mechanism 23. The bottom mold connecting mechanism 23 includes a bottom mold sealing plate 231 and a bottom mold sleeve 232 sleeved on the bottom mold sealing plate 231. The bottom surface of the bottom mold 21 and the outer wall are connected by a first bottom mold step 215 that surrounds the circumference. The bottom mold sealing plate 231 supports the bottom mold 21. The bottom mold sleeve 232 supports the top surface of the first bottom mold step 215 and the bottom surface of the positioning ring 22. The inner wall of the bottom mold sleeve 232 cooperates with the circumferential surface of the first bottom mold step 215 to radially limit the bottom mold 21 so that the bottom mold 21 is aligned with the axis of the bottom mold sealing plate 231.

[0042] The outer wall of the bottom mold sleeve 232 and the inner wall of the lower clamping cavity 141 are fitted with a wedge to achieve axial alignment and positioning between the mold cavity assembly 1 and the bottom mold assembly 2 when they are closed.

[0043] The bottom of the bottom mold 21 is provided with a bottom mold cooling groove 214. The bottom mold sealing plate 231 closes the bottom mold cooling groove 214 to form a bottom mold cooling water channel. The bottom mold sealing plate 231 is also provided with an inlet channel 2311 for introducing cooling water and an outlet channel 2312 for discharging cooling water. The inlet channel 2311 is connected to the first end of the bottom mold cooling water channel, and the outlet channel 2312 is connected to the end of the bottom mold cooling water channel.

[0044] Specifically, the first bottom mold step 215 is provided with a bottom mold step recess 2151; the bottom mold 21 is provided with multiple second bottom mold venting channels 217 connecting the bottom mold forming cavity 211 and the bottom mold step recess 2151; a venting space S3 is formed between the bottom mold step recess 2151 and the bottom mold sleeve 232, and the second bottom mold venting channels 217 are connected to the venting space S3; the bottom surface of the positioning ring 22 has a positioning ring venting groove 224 connecting its inner and outer walls, and a second positioning ring venting channel is formed between the positioning ring venting groove 224 and the bottom mold sleeve 232; the venting space S3 is connected to the outer wall of the positioning ring 22 through the second positioning ring venting channel.

[0045] Specifically, a second bottom mold step 216 is provided between the bottom surface of the bottom mold 21 and the first bottom mold step 215, which surrounds the bottom mold in the circumferential direction; the bottom mold 21 is provided with multiple third bottom mold exhaust channels 218 that connect the bottom mold forming cavity 211 and the second bottom mold step 216; a gap is left between the top surface of the second bottom mold step 216 and the bottom mold sealing plate 231, so as to form an exhaust transition space S2 that is connected to the exhaust space S3 between the second bottom mold step 216, the bottom mold sealing plate 231 and the bottom mold sleeve 232; the third bottom mold exhaust channel 218 is connected to the exhaust transition space S2.

[0046] The outer wall of the positioning ring 22 and the bottom mold sleeve 232 are fitted with the inner wall of the lower clamping cavity 141 to form an exhaust gap G1, and there is a mold closing gap G2 between the lower clamping cavity 14 and the bottom mold sealing plate 231. The exhaust gap G1 is connected to the outside of the bottom mold assembly 2 through the mold closing gap G2.

[0047] During blow molding, the gas in the bottom mold 21 can be discharged sequentially through the first bottom mold exhaust channel 213, exhaust chamber S1, first positioning ring exhaust channel 223, exhaust gap G1, and mold closing gap G2. It can also be discharged sequentially through the third bottom mold exhaust channel 218, exhaust transition space S2, exhaust space S3, second positioning ring exhaust channel, exhaust gap G1, and mold closing gap G2. Furthermore, it can be discharged sequentially through the second bottom mold exhaust channel 217, exhaust space S3, second positioning ring exhaust channel, exhaust gap G1, and mold closing gap G2.

[0048] Example 2 Compared with Embodiment 1, the difference in this embodiment is that the first bottom mold venting structure includes a venting groove arranged circumferentially on the outer wall of the bottom mold 21 and multiple first bottom mold venting channels 213 connecting the bottom mold forming cavity 211 and the venting groove; the first positioning ring venting structure consists of multiple first positioning ring venting channels 223 connecting the inner and outer walls of the positioning ring 22; an venting cavity is formed between the venting groove and the inner wall of the positioning ring 22, and the first positioning ring venting channels 223 are connected to the venting cavity.

[0049] Example 3 like Figure 8-11 As shown, this embodiment provides a blow molding die, which includes not only the bottom mold assembly 2 of Embodiment 1 or Embodiment 2, but also a mold cavity assembly 1. The mold cavity assembly 1 is provided with a mold cavity forming cavity 11 and a bottom mold mounting position 12. The bottom mold mounting position 12 is located below the mold cavity forming cavity 11 and is connected to the mold cavity forming cavity 11. The bottom mold mounting position 12 has a mounting mating surface corresponding to the top surface of the bottom mold 21. When the mold is closed, the bottom mold connecting mechanism 23 installs the bottom mold 21 and the positioning ring 22 into the bottom mold mounting position 12. The outer peripheral wall of the positioning ring 22 mates with the inner wall of the bottom mold mounting position 12 to align the bottom mold 21 and the mold cavity assembly 1. The top surface of the positioning ring 22 mates with the mounting mating surface to buffer the impact between the bottom mold 21 and the mold cavity assembly 1. After the mold is closed, the bottom mold forming cavity 211 and the mold cavity forming cavity 11 together form the mold forming cavity.

[0050] Specifically, the top surface of the positioning ring 22 is 0.1mm-0.5mm higher than the top surface of the bottom mold 21; after the mold is closed, the positioning ring 22 is compressed, allowing the top surface of the bottom mold 21 to mate with the installation mating surface. The positioning ring 22 is made of thermoplastic engineering plastic.

[0051] Specifically, the mold cavity assembly 1 includes two opposing half-mold cavity components. Each half-mold cavity component includes a half-mold cavity and a half-clamping opening that fits and connects to the lower part of the half-mold cavity. The interior of the half-mold cavity is provided with a half-mold cavity forming cavity and a half-mold cavity mounting cavity. The half-mold cavity mounting cavity is located below the half-mold cavity forming cavity and is connected to the half-mold cavity forming cavity. The interior of the half-clamping opening is provided with a half-clamping opening mounting cavity. When the mold is closed, the two half-mold cavities combine to form a mold cavity 13, and the two half-clamping openings combine to form a lower clamping opening 14. The mold cavity 13 and the lower clamping opening 14 combine to form the mold cavity assembly 1. The two half-mold cavity forming cavities combine to form a mold cavity forming cavity 11, the two half-mold cavity mounting cavities combine to form a mold cavity mounting cavity 131, and the two half-clamping opening mounting cavities combine to form a lower clamping opening mounting cavity 141. The mold cavity mounting cavity 131 and the lower clamping opening mounting cavity 141 together form the bottom mold mounting position 12.

[0052] Specifically, after the mold is closed, the inner diameter of the lower clamping opening 14 matches the outer diameter of the positioning ring 22, the inner diameter of the mold cavity mounting cavity 131 is larger than the outer diameter of the positioning ring 22, and there is a gap between the outer peripheral wall of the positioning ring 22 and the inner wall of the mold cavity mounting cavity 131.

[0053] The mold cavity 13 is made of aluminum, while the lower clamp 14 is made of steel.

[0054] The above embodiments are preferred embodiments of the invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A bottom mold assembly, characterized in that: It includes a bottom mold and a positioning ring. The bottom mold has a bottom mold forming cavity and a first bottom mold venting structure that connects the bottom mold forming cavity with the outer wall of the bottom mold. The positioning ring has a first positioning ring venting structure that connects its inner and outer walls. The inner wall of the positioning ring is fitted onto the outer wall of the bottom mold. The first bottom mold venting structure is connected to the first positioning ring venting structure.

2. The bottom mold assembly according to claim 1, characterized in that: The first bottom mold venting structure consists of multiple first bottom mold venting channels connecting the bottom mold forming cavity and the outer wall of the bottom mold. The first positioning ring exhaust structure includes an exhaust groove disposed circumferentially on the inner wall of the positioning ring and multiple first positioning ring exhaust channels connecting the exhaust groove and the outer wall of the positioning ring. An venting cavity is formed between the venting groove and the outer wall of the bottom mold, and the venting channel of the first bottom mold is connected to the venting cavity.

3. The bottom mold assembly according to claim 1, characterized in that: The first bottom mold venting structure includes a venting groove arranged circumferentially on the outer wall of the bottom mold and multiple first bottom mold venting channels connecting the bottom mold forming cavity and the venting groove; The first positioning ring exhaust structure consists of multiple first positioning ring exhaust channels connecting the inner and outer walls of the positioning ring. An exhaust chamber is formed between the exhaust groove and the inner wall of the positioning ring, and the exhaust channel of the first positioning ring is connected to the exhaust chamber.

4. The bottom mold assembly according to claim 1, characterized in that: The bottom mold assembly also includes a bottom mold connecting mechanism, to which the bottom of the bottom mold is connected, wherein: The bottom mold connection mechanism includes a bottom mold sealing plate and a bottom mold sleeve fitted onto the bottom mold sealing plate; The bottom surface of the bottom mold and the outer wall are connected by a first bottom mold step that surrounds the circumference. The bottom mold water sealing plate supports the bottom mold, and the bottom mold sleeve supports the top surface of the first bottom mold step and the bottom surface of the positioning ring. The inner wall of the bottom mold sleeve cooperates with the circumference of the first bottom mold step to radially limit the bottom mold.

5. The bottom mold assembly according to claim 4, characterized in that: The first bottom mold step has a bottom mold step recess; The bottom mold is provided with multiple second bottom mold venting channels that connect the bottom mold forming cavity and the bottom mold step recess; A venting space is formed between the recessed part of the bottom mold step and the bottom mold sleeve, and the venting channel of the second bottom mold is connected to the venting space. The bottom surface of the positioning ring has a positioning ring venting groove that connects its inner and outer walls, and a second positioning ring venting channel is formed between the positioning ring venting groove and the bottom mold sleeve. The exhaust space is connected to the outer wall of the positioning ring through the exhaust channel of the second positioning ring.

6. The bottom mold assembly according to claim 5, characterized in that: A second bottom mold step is provided between the bottom surface of the bottom mold and the first bottom mold step, which surrounds the bottom mold in the circumferential direction; The bottom mold is provided with multiple third bottom mold venting channels that connect the bottom mold forming cavity and the second bottom mold step. A gap is left between the top surface of the second bottom mold step and the bottom mold water sealing plate to form an venting transition space that is connected to the venting space between the second bottom mold step, the bottom mold water sealing plate and the bottom mold sleeve. The third bottom mold venting channel is connected to the venting transition space.

7. A blow molding die, comprising the bottom mold assembly as described in any one of claims 2-6, characterized in that: It also includes a mold cavity assembly, which has a mold cavity forming cavity and a bottom mold mounting position. The bottom mold mounting position is located below the mold cavity forming cavity and is connected to the mold cavity forming cavity. The bottom mold mounting position has a mounting mating surface corresponding to the top surface of the bottom mold. When the mold is closed, the bottom mold connecting mechanism installs the bottom mold and the positioning ring into the bottom mold mounting position. The outer peripheral wall of the positioning ring mates with the inner wall of the bottom mold mounting position to align the bottom mold and the mold cavity assembly. The top surface of the positioning ring mates with the mounting mating surface to buffer the impact between the bottom mold and the mold cavity assembly. After the mold is closed, the bottom mold forming cavity and the mold cavity forming cavity together form the mold forming cavity.

8. The blow molding die according to claim 7, characterized in that: The top surface of the positioning ring is 0.1mm-0.5mm higher than the top surface of the bottom mold; After the mold is closed, the positioning ring is compressed, so that the top surface of the bottom mold can mate with the installation mating surface.

9. The blow molding die according to claim 7, characterized in that: The mold cavity assembly includes two opposing half-mold cavity components, each half-mold cavity component including a half-mold cavity and a half-clamp that fits and connects to the lower part of the half-mold cavity; The interior of the semi-mold cavity is provided with a semi-mold cavity forming cavity and a semi-mold cavity mounting cavity. The semi-mold cavity mounting cavity is located below the semi-mold cavity forming cavity and is connected to the semi-mold cavity forming cavity. The interior of the semi-clamp joint has a semi-clamp installation cavity; When the mold is closed, the two half-cavities combine to form the mold cavity, the two half-clamps combine to form the lower clamp, the mold cavity and the lower clamp combine to form the mold cavity assembly, the two half-cavities forming the mold cavity forming cavity, the two half-cavities mounting cavity combining to form the mold cavity mounting cavity, the two half-clamp mounting cavities combining to form the lower clamp mounting cavity, and the mold cavity mounting cavity and the lower clamp mounting cavity together form the bottom mold mounting position.

10. The blow molding die according to claim 9, characterized in that: After the mold is closed, the inner diameter of the lower clamp matches the outer diameter of the positioning ring, the inner diameter of the mold cavity mounting cavity is larger than the outer diameter of the positioning ring, and there is a gap between the outer peripheral wall of the positioning ring and the inner wall of the mold cavity mounting cavity.

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