A cavity plate assembly, a cavity assembly and a parison mould

Abstract

A cavity plate assembly includes a cavity plate and at least one cavity plate backing plate. The cavity plate backing plate is installed on one end face of the cavity plate. The cavity plate is provided with a plurality of accommodating cavities for accommodating at least part of the cavity structure. The cavity plate backing plate corresponds to at least one accommodating cavity, and the cavity plate backing plate has an accommodating hole corresponding to the accommodating cavity. The cavity plate is provided with connection holes, and the cavity plate backing plate is provided with through holes corresponding to the connection holes, so that a connecting piece passes through the through holes and is connected to the connection holes. By adding a cavity plate backing plate, when redesigning the parting line position of the preform, only parts such as the cavity, the cavity clamping ring, and the cavity plate backing plate need to be redesigned and processed, without having to redesign and process the plate body of the cavity plate, simplifying the redesign and processing process, saving time and cost, and improving the R & D efficiency and the economic benefits of the enterprise.

Description

Technical Field

[0001] The present invention belongs to the technical field of injection-blow molding dies, and particularly relates to a cavity plate assembly, a cavity assembly and an injection-blow molding die. Background Art

[0002] In the existing injection-blow molding dies, the cavity assembly includes a cavity, a cavity bottom, a cavity clamping ring and a cavity plate. The main body part of the cavity and the cavity bottom are axially installed in the inner cavity of the cavity plate in sequence. The flange part of the cavity is connected with the cavity clamping ring, and the flange part of the cavity and the cavity clamping ring are installed on the end face of the cavity plate.

[0003] With the existing cavity assembly, the parting line position of the preform appears at the connection between the die lip and the cavity. When redesigning the parting line position of the preform, not only the cavity, the cavity clamping ring and other parts need to be redesigned and processed, but also the cavity plate needs to be redesigned and processed. Compared with parts, the process of redesigning and processing the plate body is more complex, requires more time and cost, and more affects the R & D efficiency and the economic benefits of the enterprise. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a cavity plate assembly, a cavity assembly and an injection-blow molding die.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A cavity plate assembly includes a cavity plate and at least one cavity plate backing plate. The cavity plate backing plate is installed on one end face of the cavity plate. The cavity plate is provided with a plurality of accommodating cavities for accommodating at least part of the cavity structure. The cavity plate backing plate corresponds to at least one accommodating cavity, and the cavity plate backing plate has an accommodating hole corresponding to the accommodating cavity. The cavity plate is provided with connection holes, and the cavity plate backing plate is provided with through holes corresponding to the connection holes, so that a connecting piece passes through the through holes and is connected to the connection holes.

[0007] In the present invention, a pin hole is provided on the front end face of the cavity plate backing plate.

[0008] In the present invention, an annular sealing gasket is provided between the cavity plate backing plate and the cavity plate.

[0009] In the present invention, a first sealing groove is formed on the end face of the cavity plate that fits with the cavity plate backing plate. The first sealing groove is located on the outer periphery of the accommodating cavity, and the annular sealing gasket is installed in the first sealing groove.

[0010] In the present invention, a second sealing groove is formed on the end face of the cavity plate backing plate away from the cavity plate, and an annular sealing gasket is also installed in the second sealing groove.

[0011] In the present invention, at least one water inlet channel for introducing a cooling medium into the cooling water channel of the mold cavity and at least one water outlet channel for discharging the cooling medium in the bottom cooling water channel of the mold cavity are provided in the mold cavity plate.

[0012] Based on the mold cavity plate assembly provided above, the present invention further provides a mold cavity assembly, including a mold cavity, a mold cavity clamping ring, a mold cavity bottom, and the above-mentioned mold cavity plate assembly. The mold cavity clamping ring and the mold cavity bottom are respectively located at both ends of the mold cavity. The mold cavity bottom is located in the accommodating cavity, one end of the mold cavity close to the mold cavity bottom is located in the accommodating cavity, and the other end of the mold cavity extends out of the accommodating hole and is in positioning cooperation with the end face of the mold cavity plate backing plate.

[0013] In the present invention, the mold cavity clamping ring has an insertion hole corresponding to the through hole. The insertion hole axially penetrates the mold cavity clamping ring, and a connecting member passes through the insertion hole and the through hole and is connected to the connection hole, so that the mold cavity clamping ring and the mold cavity plate backing plate are fixed to the mold cavity plate.

[0014] In the present invention, positioning holes corresponding to the pin holes are provided on the mold cavity or the mold cavity clamping ring, and the mold cavity is positioned with the mold cavity plate backing plate through pins.

[0015] Based on the mold cavity assembly provided above, the present invention further provides a preform mold, including a mold core structure, a mold lip, and the above-mentioned mold cavity assembly. The mold core structure, the mold lip and the mold cavity assembly cooperate to jointly define a molding cavity.

[0016] [[ID=I5]]The beneficial effect of the present invention is that by adding a mold cavity plate backing plate, when redesigning the parting line position of the preform, only parts such as the mold cavity, the mold cavity clamping ring, and the mold cavity plate backing plate need to be redesigned and processed, without having to redesign and process the plate body of the mold cavity plate, simplifying the redesign and processing process, saving time and cost, and improving the R & D efficiency and the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments:

[0018] Figure 1 It is a schematic structural diagram of the preform mold when the mold cavity assembly of this embodiment adopts Embodiment 1;

[0019] Figure 2 It is a schematic structural diagram of the preform mold when the mold cavity assembly of this embodiment adopts Embodiment 2;

[0020] Figure 3 It is a schematic structural diagram of the preform mold when the mold cavity assembly of this embodiment adopts Embodiment 3;

[0021] Figure 4 It is a schematic structural diagram of the preform mold when the mold cavity assembly of this embodiment adopts Embodiment 4;

[0022] Figure 5 Schematic diagram of the internal structure of the cavity plate of this embodiment;

[0023] Figure 6 Top view structure diagram of the cavity plate of this embodiment;

[0024] Figure 7 Schematic diagram of the internal structure of the backing plate of the cavity plate of this embodiment;

[0025] Figure 8 Top view structure diagram of the backing plate of the cavity plate of this embodiment;

[0026] Figure 9 Top view structure diagram of the cavity locking ring of the cavity of this embodiment;

[0027] Figure 10 Schematic diagram of the structure of the cavity of this embodiment. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] Embodiment:

[0030] As Figures 1 to 10 shown, this embodiment discloses a cavity plate assembly, including a cavity plate A and at least one cavity plate backing plate B. The cavity plate backing plate B is installed on one end face of the cavity plate A. The cavity plate A is provided with a plurality of accommodating cavities A1 for accommodating at least part of the structure of the cavity C. The cavity plate backing plate B corresponds to at least one accommodating cavity A1, and the cavity plate backing plate B has an accommodating hole B1 corresponding to the accommodating cavity A1; a connecting hole A2 is provided on the cavity plate A, and a through hole B2 corresponding to the connecting hole A2 is provided on the cavity plate backing plate B, so that a connecting member passes through the through hole A2 and is connected to the connecting hole A2, where the connecting member can be a bolt, a screw or a rivet, etc.

[0031] In this embodiment, in order to quickly determine the installation direction of the cavity plate backing plate B, a pin hole B3 is provided on the front end face of the cavity plate backing plate B. The cavity locking ring D or the flange part of the cavity C is positioned by a positioning pin, so as to position the installation of the cavity C, and align the water inlet channel A3 of the cavity plate A with the water inlet of the cavity cooling water channel C1. In addition, in order to prevent the leakage of the cooling medium between the cavity plate backing plate B and the cavity plate A, an annular gasket E is provided between the cavity plate backing plate B and the cavity plate A.

[0032] In this embodiment, at least one water inlet channel A3 for introducing a cooling medium into the cavity cooling water channel C1 and one water outlet channel A4 for discharging the cooling medium in the cavity bottom cooling water channel F1 are provided in the cavity plate A. Of course, several water inlet channels A3 and water outlet channels A4 can be provided in the cavity plate A to adapt to the cavity cooling water channels C1 with water inlets opened at different positions and the cavity bottom cooling water channels F1 with water outlets opened at different positions. During use, only the water inlet channel A3 corresponding to the water inlet of the cavity cooling water channel C1 needs to be opened, and the other water inlet channels A3 are blocked with plugs; similarly, only the water outlet channel A4 corresponding to the water outlet of the cavity bottom cooling water channel F1 needs to be opened, and the other water outlet channels A4 are blocked with plugs.

[0033] In this embodiment, a first sealing groove A5 is provided on the end face of the cavity plate A that fits with the cavity plate backing plate B. The first sealing groove A5 is located on the outer periphery of the accommodation cavity A1, and the annular sealing gasket E is installed in the first sealing groove A5. A second sealing groove B4 is provided on the end face of the cavity plate backing plate B away from the cavity plate A, and the annular sealing gasket E is also installed in the second sealing groove B4. This annular sealing gasket E is used for sealing the cooling medium between the cavity plate backing plate B and the cavity C.

[0034] Based on a cavity plate assembly disclosed in the above embodiment, this embodiment also discloses a cavity assembly, including a cavity C, a cavity clamping ring D, a cavity bottom F, and the above-mentioned cavity plate assembly. The cavity clamping ring D and the cavity bottom F are respectively located at both ends of the cavity C. The cavity bottom F is located in the accommodation cavity A1. One end of the cavity C close to the cavity bottom F is located in the accommodation cavity A1, and the other end of the cavity C extends out of the accommodation hole B1 and is in positioning cooperation with the end face of the cavity plate backing plate B. The cavity clamping ring D can be integrally processed or separately processed and connected with the cavity C; the cavity bottom F can also be integrally processed or separately processed and connected with the cavity C.

[0035] Specifically, the cavity clamping ring D is connected to the top end of the cavity C, the cavity bottom F is connected to the bottom end of the cavity C. The cavity bottom F is installed in the accommodation cavity A1. One end of the cavity C connected to the cavity bottom F passes through the accommodation hole B1 and enters the accommodation cavity A1. One end of the cavity C connected to the cavity clamping ring D extends out of the accommodation hole B1 and is axially positioned in cooperation with the end face of the cavity plate backing plate B.

[0036] In this embodiment, the cavity clamping ring D has an insertion hole D1 corresponding to the through hole B2. The insertion hole D1 axially penetrates the cavity clamping ring D. The insertion hole D1 is preferably a stepped hole. The connecting piece passes through the insertion hole D1 and the through hole B2 and is connected to the connecting hole A2, so that the cavity clamping ring D and the cavity plate backing plate B are fixed to the cavity plate A; when installing and fixing the cavity C, the cavity plate backing plate B, and the cavity plate A, the connecting piece is inserted from the insertion hole D1, passes through the through hole B2, and is connected to the connecting hole A2, thereby realizing the fixed connection among the three.

[0037] In this embodiment, positioning holes CD corresponding to the pin holes B3 are provided on the mold cavity C or the mold cavity clamping ring D. The mold cavity C and the mold cavity plate backing plate B have a definite installation position through the pin G. The pin G is inserted axially. The side of the pin G abuts against the positioning hole CD, and the tail end is inserted into the pin hole B3, so as to realize the positioning installation between the mold cavity C and the mold cavity plate backing plate B, so that the water inlet channel A3 of the mold cavity plate A is aligned with the water inlet of the mold cavity cooling water channel C1. The mold cavity plate A has a water inlet channel A3 and a water outlet channel A4. The water inlet channel A3 is aligned with the water inlet of the mold cavity cooling water channel C1. The water outlet of the mold cavity cooling water channel C1 is communicated with the water inlet of the mold cavity bottom cooling water channel F1, and the water outlet of the mold cavity bottom F is communicated with the water outlet channel A4. Of course, the pin G can also be inserted radially for positioning. At this time, both the pin hole B3 and the positioning hole CD are semi-circular holes opened radially.

[0038] In this embodiment, the three parts of the mold cavity clamping ring D, the mold cavity C and the mold cavity bottom F can be independent, or the mold cavity clamping ring D and the mold cavity C can be set as an integral structure, the mold cavity C and the mold cavity bottom F can be set as an integral structure, or the three can be an integral structure. The structures of the corresponding insertion holes D1, positioning holes CD, mold cavity cooling water channels C1 and mold cavity bottom cooling water channels F1 change accordingly. For the specific structure of the mold cavity cooling water channel C1, reference can be made to the Chinese utility model patent document with the patent application number CN202120582068.0.

[0039] In this embodiment, several specific implementation manners of the mold cavity assembly are provided as follows:

[0040] Embodiment 1: The mold cavity clamping ring D, the mold cavity C and the mold cavity bottom F are independently arranged, and there are the following two installation methods.

[0041] Installation method 1-1: The mold cavity bottom F is installed in the accommodation cavity A1 of the mold cavity plate A; the mold cavity plate backing plate B is installed on the front end face of the mold cavity plate A. The flange part of the mold cavity C is connected to the mold cavity clamping ring D. The main body part of the mold cavity C passes through and is installed in the accommodation hole B1 and the accommodation cavity A1 in sequence, and the flange part of the mold cavity C and the mold cavity clamping ring D are both installed on the front end face of the mold cavity plate backing plate B.

[0042] Installation method 1-2: The mold cavity bottom F is installed in the accommodation cavity A1 of the mold cavity plate A; the flange part of the mold cavity C is connected to the mold cavity clamping ring D; the mold cavity plate backing plate B is installed on a section of the main body part of the mold cavity C, and the front end face of the mold cavity plate backing plate B fits the flange part of the mold cavity C and the mold cavity clamping ring D; the other section of the main body part of the mold cavity C is installed in the accommodation cavity A1 of the mold cavity plate A, and the rear end face of the mold cavity plate backing plate B fits the front end face of the mold cavity plate A.

[0043] In Embodiment 1, the pin hole B3 is opened on the front end face of the cavity plate spacer B. The cavity locking ring D of the cavity or the flange part of the cavity C is positioned by a positioning pin, so as to position and install the cavity C, and align the water inlet channel A3 of the cavity plate A with the water inlet of the cooling water channel on the outer periphery of the cavity C. The connection hole A2 is opened on the cavity plate spacer B, and the connection and fixation between the cavity locking ring D, the cavity plate spacer B and the cavity plate A can be realized through a connecting piece. The first sealing groove A5 is opened on the front end face of the cavity plate A, and the installation gap between the cavity plate A and the cavity plate spacer B is sealed by an annular gasket E to prevent the cooling medium from overflowing from the installation gap. The second sealing groove B4 is opened on the front end face of the cavity plate spacer B, and the installation gaps between the cavity plate spacer B and the flange part of the cavity C and between the cavity plate spacer B and the cavity locking ring D are sealed by an annular gasket E to prevent the cooling medium from overflowing from the installation gap. At the same time, an annular gasket E is also arranged in the connection end face between the cavity C and the cavity bottom F, so as to prevent the cooling medium in the cavity cooling water channel C1 and the cavity bottom cooling water channel F1 from entering the molding cavity and affecting the molding of the product. An annular gasket E is also arranged between the outer side wall of the cavity bottom F and the inner side wall of the cavity plate A, so as to prevent the cooling medium in the cavity bottom cooling water channel F1 from overflowing from the installation gap between the cavity bottom F and the cavity plate A.

[0044] Embodiment 2: When the cavity C and the cavity locking ring D are set as an integral structure, there are the following two installation methods.

[0045] Installation method 2-1: The cavity bottom F is installed in the accommodation cavity A1 of the cavity plate A, and the cavity plate spacer B is installed on the front end face of the cavity plate A; the main body part of the cavity C sequentially passes through and is installed in the accommodation hole B1 and the accommodation cavity A1, and the flange part of the cavity C is installed on the front end face of the cavity plate spacer B.

[0046] Installation method 2-2: The cavity bottom F is installed in the accommodation cavity A1 of the cavity plate A, the cavity plate spacer B is installed on a segment of the main body part of the cavity C, and the front end face of the cavity plate spacer B fits the flange part of the cavity C; the other segment of the main body part of the cavity C is installed in the accommodation cavity A1 of the cavity plate A, and the rear end face of the cavity plate spacer B fits the front end face of the cavity plate A.

[0047] In Embodiment 2, the pin hole B3 is opened on the front end face of the cavity plate spacer B. The cavity C is positioned by the positioning pin, so that the water inlet channel A3 of the cavity plate A is aligned with the water inlet of the cavity cooling water channel C1. The connection hole A2 is opened on the cavity plate spacer B. The connection and fixation among the cavity C, the cavity plate spacer B, and the cavity plate A can be realized through the connecting piece. The first sealing groove A5 is opened on the front end face of the cavity plate A. The installation gap between the cavity plate A and the cavity plate spacer B is sealed by the annular gasket E to prevent the cooling medium from overflowing from the installation gap. The second sealing groove B4 is opened on the front end face of the cavity plate spacer B. The installation gap between the cavity plate spacer B and the flange part of the cavity C is sealed by the annular gasket E to prevent the cooling medium from overflowing from the installation gap. At the same time, an annular gasket E is also arranged in the connection end face between the cavity C and the cavity bottom F, so as to prevent the cooling medium in the cavity cooling water channel C1 and the cavity bottom cooling water channel F1 from entering the molding cavity and affecting the molding of the product. An annular gasket E is also arranged between the outer side wall of the cavity bottom F and the inner side wall of the cavity plate A, so as to prevent the cooling medium in the cavity bottom cooling water channel F1 from overflowing from the installation gap between the cavity bottom F and the cavity plate A.

[0048] Embodiment 3: When the cavity C and the cavity bottom F are set as an integral structure, there are the following two installation methods.

[0049] Installation method 3-1: The cavity plate spacer B is installed on the front end face of the cavity plate A. The flange part of the cavity C is connected to the cavity clamping ring D. The main body part and the bottom of the cavity C sequentially pass through and are installed in the accommodating hole B1 and the accommodating cavity A1, and the flange part of the cavity C and the cavity clamping ring D are installed on the front end face of the cavity plate spacer B.

[0050] Installation method 3-2: The flange part of the cavity C is connected to the cavity clamping ring D; the cavity plate spacer B is installed on a segment of the main body part of the cavity C, and the front end face of the cavity plate spacer B fits the flange part of the cavity C and the cavity clamping ring D; the other segment of the main body part of the cavity C and the bottom of the cavity C are installed in the accommodating cavity A1, and the rear end face of the cavity plate spacer B fits the front end face of the cavity plate A.

[0051] In Embodiment 3, the pin hole B3 is opened on the front end face of the cavity plate backing plate B. The flange part of the cavity locking ring D or the cavity C is positioned by a positioning pin, so as to position the cavity C, and make the water inlet channel A3 of the cavity plate A align with the water inlet of the cavity cooling water channel C1. The connection hole A2 is opened on the cavity plate backing plate B, and the connection and fixation among the cavity locking ring D, the cavity plate backing plate B and the cavity plate A can be realized through a connecting piece. The first sealing groove A5 is arranged on the front end face of the cavity plate A, and the installation gap between the cavity plate A and the cavity plate backing plate B is sealed by an annular gasket E to prevent cooling water from overflowing from the installation gap. The second sealing groove B4 is arranged on the front end face of the cavity plate backing plate B, and the installation gaps between the cavity plate backing plate B and the flange part of the cavity C and between the cavity plate backing plate B and the cavity locking ring D are sealed by an annular gasket E to prevent the cooling medium from overflowing from the installation gap. At the same time, an annular gasket E is also arranged between the bottom of the cavity C and the cavity plate A to prevent the cooling medium from overflowing from the installation gap.

[0052] Embodiment 4: When the cavity C, the cavity locking ring D and the cavity bottom F are set as an integral structure, there are the following two installation methods.

[0053] Installation method 4-1: The cavity plate backing plate B is installed on the front end face of the cavity plate A; the main body part and the bottom of the cavity C pass through and are installed in the accommodating hole B1 and the accommodating cavity A1 in sequence, and the flange part of the cavity C is installed on the front end face of the cavity plate backing plate B.

[0054] Installation method 4-2: The cavity plate backing plate B is installed on a segment of the main body part of the cavity C, and the front end face of the cavity plate backing plate B fits the flange part of the cavity C; the other segment of the main body part of the cavity C and the bottom of the cavity C are installed in the accommodating cavity A1, and the rear end face of the cavity plate backing plate B fits the front end face of the cavity plate A.

[0055] In Embodiment 4, the pin hole B3 is opened on the front end face of the cavity plate backing plate B. The cavity C is positioned by a positioning pin, so that the water inlet channel A3 of the cavity plate A aligns with the water inlet of the cavity cooling water channel C1. The connection hole A2 is opened on the cavity plate backing plate B, and the connection and fixation among the cavity C, the cavity plate backing plate B and the cavity plate A can be realized through a connecting piece. The first sealing groove A5 is opened on the front end face of the cavity plate A, and the installation gap between the cavity plate A and the cavity plate backing plate B is sealed by an annular gasket E to prevent the cooling medium from overflowing from the installation gap. The second sealing groove B4 is opened on the front end face of the cavity plate backing plate B, and the installation gap between the cavity plate backing plate B and the flange part of the cavity C is sealed by a sealing ring to prevent the cooling medium from overflowing from the installation gap. At the same time, an annular gasket E is also arranged between the bottom of the cavity C and the cavity plate A to prevent the cooling medium from overflowing from the installation gap.

[0056] Based on a cavity assembly disclosed in the above embodiments, the present embodiment also discloses a parison mold, which includes a core structure, a die lip H, and the above-mentioned cavity assembly. The core structure, the die lip H, and the cavity assembly cooperate to jointly define a molding cavity, and the die lip H is connected to one end of the cavity assembly close to the cavity plate backing plate B. Specifically, the core structure includes a coaxially installed core cooling tube I, a core J, a core seat K, and a core sleeve L. The core structure can adopt the core structure in the prior art and will not be described in detail here.

[0057] The above description is only a preferred embodiment of the present invention. As long as the technical solutions that achieve the purpose of the present invention by substantially the same means fall within the protection scope of the present invention.

Claims

1. A cavity assembly, characterized in that: It includes a cavity, a cavity clamping ring, a cavity bottom and a cavity plate assembly. The cavity plate assembly includes a cavity plate and at least one cavity plate backing plate. The cavity plate backing plate is installed on one end face of the cavity plate. The cavity plate is provided with a plurality of accommodating cavities for accommodating at least part of the cavity structure. The cavity plate backing plate corresponds to at least one accommodating cavity, and the cavity plate backing plate has an accommodating hole corresponding to the accommodating cavity. The cavity plate is provided with connection holes, and the cavity plate backing plate is provided with through holes corresponding to the connection holes so that a connecting piece passes through the through holes and is connected to the connection holes. The cavity clamping ring and the cavity bottom are respectively located at two ends of the cavity. The cavity bottom is located in the accommodating cavity. One end of the cavity close to the cavity bottom is located in the accommodating cavity, and the other end of the cavity extends out of the accommodating hole and is in positioning fit with the end face of the cavity plate backing plate. The cavity clamping ring is installed on the front end face of the cavity plate backing plate. The die lip is connected to one end of the cavity assembly close to the cavity plate backing plate.

2. The cavity assembly according to claim 1, wherein: A pin hole is provided on the front end face of the cavity plate backing plate.

3. A cavity assembly according to claim 1, characterized in that: An annular sealing gasket is provided between the cavity plate backing plate and the cavity plate.

4. The cavity assembly according to claim 3, wherein: A first sealing groove is formed on the end face of the cavity plate that fits with the cavity plate backing plate. The first sealing groove is located on the outer periphery of the accommodating cavity, and the annular sealing gasket is installed in the first sealing groove.

5. The cavity assembly according to claim 4, wherein: A second sealing groove is formed on the end face of the cavity plate backing plate away from the cavity plate, and an annular sealing gasket is also installed in the second sealing groove.

6. A cavity assembly according to claim 1, wherein: At least one water inlet channel for introducing a cooling medium into the cavity cooling water channel and at least one water outlet channel for discharging the cooling medium in the cavity bottom cooling water channel are formed in the cavity plate.

7. A cavity assembly according to claim 1, characterized in that: The cavity clamping ring has an insertion hole corresponding to the through hole. The insertion hole axially penetrates the cavity clamping ring. A connecting piece passes through the insertion hole and the through hole and is connected to the connection hole so that the cavity clamping ring and the cavity plate backing plate are fixed to the cavity plate.

8. The cavity assembly according to claim 2, characterized in that: A positioning hole corresponding to the pin hole is provided on the cavity or the cavity clamping ring, and the cavity is positioned with the cavity plate backing plate through a pin.

9. A parison injection mold, characterized in that: It includes a die core structure, a die lip and the cavity assembly according to any one of claims 1-8 above. The die core structure, the die lip and the cavity assembly cooperate to jointly define a molding cavity.

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