Extrusion blow molding die

Abstract

An extrusion blowing mold comprises two side molds which are in mirror symmetry along a mold parting surface, each side mold comprises an upper half mold and a lower half mold which are sequentially arranged along a longitudinal axis, and a clamping opening plate capable of moving in the direction perpendicular to the mold parting surface is movably installed between each upper half mold and the corresponding lower half mold. At least two blowing needles capable of moving in the direction perpendicular to the parting surface are movably installed in the clamping opening plate, and needle heads of the blowing needles can move to the inner side of the clamping opening plate; the upper half mold and the lower half mold which are used for limiting blow molding of the upper bottle body and the lower bottle body are arranged in the mold, and correspondingly, the blowing needles facing the upper half mold and the lower half mold are arranged in the clamping opening plate, so that the blow molding speed and the blow molding efficiency are guaranteed; and during blow molding, the blowing needle can guide the blown gas, so that the deformation of the upper bottle blank and the lower bottle blank is more uniform, and the wall thicknesses of the formed upper bottle body and the formed lower bottle body are more uniform.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to an extrusion blow molding mold. Background Art

[0002] Container bottles are generally processed by blow molding. Before the blow molding process, it is necessary to first injection mold a bottle blank with a bottle mouth, and then put the bottle blank into the mold for blow molding. The bottle blank is blown into a container bottle.

[0003] In the production of container bottles, in order to increase the output of container bottles, some mold manufacturers have designed an extrusion blow molding mold that can simultaneously blow mold two container bottles in one mold cavity. The extrusion blow molding mold is provided with a connected upper mold cavity and a lower mold cavity. Correspondingly, the bottle blank placed in the extrusion blow molding mold for blow molding also has an upper bottle blank and a lower bottle blank. During blow molding, the blow needle is introduced into the mold from one side of the mold, and then the upper bottle blank in the upper mold cavity and the lower bottle blank in the lower mold cavity are blow molded at the same time, thereby completing the blow molding of two container bottles at the same time. For details, please refer to the patent application document with patent publication number WO2004078444A2.

[0004] However, existing extrusion blow molding molds generally have the following disadvantages:

[0005] 1. Only one blow needle is used to blow mold the upper and lower mold cavities at the same time, resulting in a slow blow molding speed and low blow molding efficiency;

[0006] 2. Although at least two blow needles can be used to blow mold the upper and lower mold cavities at the same time, the blow needles are introduced into the mold from the same side, and the blowing lacks guidance, which easily leads to uneven blowing. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art, the utility model provides an extrusion blow molding die which has high blow molding efficiency and guiding effect of blowing air so as to make the bottle blank blow molding uniform.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] An extrusion blow molding mold comprises two side molds that are mirror-symmetrical along a parting surface, the side mold comprising an upper half mold and a lower half mold arranged in sequence along a longitudinal axis, a clamping plate that can move in a direction perpendicular to the parting surface is movably installed between the upper half mold and the lower half mold, at least two blow needles that can move in a direction perpendicular to the parting surface are movably installed in the clamping plate, and the needle heads of the blow needles can move to the inner side of the clamping plate; wherein at least one of the blow needles is located above the horizontal center plane of the clamping plate; and at least one of the blow needles is located below the horizontal center plane of the clamping plate.

[0010] The needle tip of the blow needle is a beveled tip;

[0011] At least one of the blow needles is in one of the side molds, and the bevel tip of the blow needle faces the upper mold; at least one of the blow needles is in the other side mold, and the bevel tip of the blow needle faces the lower mold.

[0012] In the present invention, a mounting position adapted to the clamping plate is formed between the upper half mold and the lower half mold, and the clamping plate is movably mounted in the mounting position and can move in the mounting position in a direction perpendicular to the parting surface;

[0013] A blow pin hole matched with the blow pin is arranged in the clamping plate along a direction perpendicular to the parting surface. The blow pin is movably installed in the blow pin hole and can move in the blow pin hole along a direction perpendicular to the parting surface.

[0014] In the utility model, the extrusion blow molding die further comprises a clamp plate driving mechanism and a blow needle driving mechanism;

[0015] The clamp plate driving mechanism comprises two clamp plate driving cylinders, which are respectively arranged on the left and right sides of the middle part of the side mold and respectively connected to the clamp plate, and jointly drive the clamp plate to move in a direction perpendicular to the parting surface;

[0016] The blow needle driving mechanism comprises a blow needle driving cylinder, which is arranged outside the middle part of the side mold and connected to the blow needle, and drives the blow needle to move in a direction perpendicular to the parting surface.

[0017] In the utility model, in one of the side molds, guide pillars are respectively provided on the parting surfaces of the upper half mold and the lower half mold in a direction perpendicular to the parting surfaces;

[0018] In another side mold, guide sleeves are respectively provided on the parting surfaces of the upper half mold and the lower half mold in a direction perpendicular to the parting surfaces;

[0019] The guide pin and the guide sleeve are positioned correspondingly and matched, and the two side molds are molded or opened based on the cooperation between the guide pin and the guide sleeve.

[0020] In the utility model, the inner side of the upper half mold has an upper half cavity, the inner side of the lower half mold has a lower half cavity, and the inner side of the clamp plate has a clamp half cavity; when the two side molds are butted along the parting surface, the two upper half cavities of the two side molds are combined to form an upper mold cavity, the two lower half cavities of the two side molds are combined to form a lower mold cavity, and the two clamp half cavities of the two side molds are combined to form a clamp cavity, the upper mold cavity is connected to the lower mold cavity through the clamp cavity, and the needle head of the blow needle can be moved into the clamp cavity.

[0021] In the utility model, the upper half mold comprises an upper bottle bottom half mold, an upper bottle body half mold and an upper bottle mouth half mold which are sequentially arranged along the longitudinal axis, the inner side of the upper bottle bottom half mold has an upper bottle bottom half cavity, the inner side of the upper bottle body half mold has an upper bottle body half cavity, the inner side of the upper bottle mouth half mold has an upper bottle mouth half cavity, and the lower edge of the upper bottle mouth half cavity is provided with an upper cutting edge;

[0022] The upper bottle mouth half mold is connected to the bottom of the upper bottle body half mold, and the upper bottle bottom half mold can move along the longitudinal axis direction. When the upper bottle bottom half mold moves along the longitudinal axis direction to be connected with the upper bottle body half mold, the upper bottle bottom half cavity, the upper bottle body half cavity, and the upper bottle mouth half cavity are connected to form the upper half cavity.

[0023] In the utility model, the extrusion blow molding mold further comprises an upper bottle bottom half mold driving mechanism;

[0024] The upper bottle bottom half mold driving mechanism comprises an upper bottle bottom half mold driving cylinder, which is arranged on the upper side of the side mold and connected to the upper bottle bottom half mold, driving the upper bottle bottom half mold to move along the longitudinal axis direction;

[0025] Alternatively, the upper bottle bottom half mold driving mechanism includes two upper bottle bottom half mold driving cylinders, which are respectively arranged on the left and right sides of the upper part of the side mold and are respectively connected to the upper bottle bottom half mold, and jointly drive the upper bottle bottom half mold to move along the longitudinal axis direction.

[0026] In the utility model, the lower half mold comprises a lower bottle mouth half mold, a lower bottle body half mold and a lower bottle bottom half mold which are sequentially arranged along the longitudinal axis, the inner side of the lower bottle mouth half mold has a lower bottle mouth half cavity, and the upper edge of the lower bottle mouth half cavity is provided with a lower cutting edge, the inner side of the lower bottle body half mold has a lower bottle body half cavity, and the inner side of the lower bottle bottom half mold has a lower bottle bottom half cavity;

[0027] The lower bottle mouth half mold is connected to the top of the lower bottle body half mold, and the lower bottle bottom half mold can move along the longitudinal axis direction. When the lower bottle bottom half mold moves along the longitudinal axis direction to be connected with the lower bottle body half mold, the lower bottle mouth half cavity, the lower bottle body half cavity, and the lower bottle bottom half cavity are connected to form the lower half cavity.

[0028] In the utility model, the extrusion blow molding mold further comprises a lower bottle bottom half mold driving mechanism;

[0029] The lower bottle bottom half mold driving mechanism comprises a lower bottle bottom half mold driving cylinder, which is arranged at the lower side of the side mold and connected to the lower bottle bottom half mold, and drives the lower bottle bottom half mold to move along the longitudinal axis direction;

[0030] Alternatively, the lower bottle bottom half mold driving mechanism includes two lower bottle bottom half mold driving cylinders, which are respectively arranged on the left and right sides of the lower part of the side mold and are respectively connected to the lower bottle bottom half mold, and jointly drive the lower bottle bottom half mold to move along the longitudinal axis direction.

[0031] The beneficial effects of the utility model are as follows: an upper half mold and a lower half mold are arranged in the mold for limiting the blow molding of the upper bottle body and the lower bottle body, and correspondingly, a blow needle is arranged in the clamping plate toward the upper half mold and the lower half mold, thereby ensuring the blow molding speed and the blow molding efficiency; and the blow needle can guide the blown gas during blow molding, so that the deformation of the upper bottle blank and the lower bottle blank is more uniform, and the wall thickness of the upper bottle body and the lower bottle body after molding is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of the extrusion blow molding die of this embodiment;

[0033] Figure 2 Schematic diagram of the structure of the side mold of this embodiment;

[0034] Figure 3 Schematic diagram of the structure of the clamping plate of this embodiment;

[0035] Figure 4 Schematic diagram of the structure of the upper half mold of this embodiment;

[0036] Figure 5 It is a schematic structural diagram of the lower half mold of this embodiment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0038] like Figures 1 to 5As shown, this embodiment discloses an extrusion blow molding mold, comprising two side molds 1 that are mirror-symmetrical along the parting surface, the side mold 1 comprising an upper half mold 11 and a lower half mold 12 arranged in sequence along the longitudinal axis, a clamping plate 13 that can move in a direction perpendicular to the parting surface is movably installed between the upper half mold 11 and the lower half mold 12, and a blow needle 14 that can move in a direction perpendicular to the parting surface is movably installed in the clamping plate 13 above and below the horizontal center plane of the clamping plate 13, and the needle head of the blow needle 14 can move to the inner side of the clamping plate 13. The needle head of the blow needle 14 is preferably a beveled tip, and there are two blow needles 14, one of which faces the upper half mold 11, and the other faces the lower half mold 12; preferably, the needle head of the blow needle 14 located above the horizontal center plane of the clamping plate 13 faces the upper half mold 11; the needle head of the blow needle 14 located below the horizontal center plane of the clamping plate 13 faces the lower half mold 12. In this embodiment, an upper half mold 11 and a lower half mold 12 are configured in the mold for limiting the blow molding of the upper bottle body and the lower bottle body. Correspondingly, a blow needle 14 with a needle head facing the upper half mold 11 is arranged above the horizontal center plane of the clamping plate 13, and a blow needle 14 with a needle head facing the lower half mold 12 is arranged below the horizontal center plane of the clamping plate 13, thereby ensuring the blow molding speed and blow molding efficiency; and the blow needle 14 can guide the blown gas during blow molding, so that the deformation of the upper bottle blank and the lower bottle blank is more uniform, and the wall thickness of the upper bottle body and the lower bottle body after molding is more uniform.

[0039] As a preferred embodiment, in one of the side molds 1, the blow needle 14 is arranged above the horizontal center plane of the clamp plate 13; in the other side mold 1, the blow needle 14 is arranged below the horizontal center plane of the clamp plate 13. That is, the blow needles 14 are arranged on the two side molds 1 respectively, and the blow needle 14 of one side mold 1 is located above the horizontal center plane of the clamp plate 13, while the blow needle 14 of the other side mold 1 is located below the horizontal center plane of the clamp plate 13. At this time, the blow needle 14 has a lower requirement on the thickness dimension of the clamp plate 13, and the configuration is more reasonable. The center axis distance between the two blow needles 14 in the longitudinal direction of the side mold 1 is preferably 3mm.

[0040] In addition, the blow needles 14 can also be set in one of the side molds 1, and two blow needles 14 are set in one of the side molds 1, and the two blow needles 14 are respectively located above and below the horizontal center plane of the clamping plate 13. At this time, since it is necessary to configure two upper and lower blow needles 14 in one side mold 1 at the same time, a thicker clamping plate 13 size is required accordingly; in order to solve the problem of the large thickness of the clamping plate 13, the blow needle 14 can also be a Y-shaped structure, and a blow needle 14 is set in one of the side molds 1, and the blow needle 14 has two upper and lower forked needle heads. At this time, the blow needle 14 can be driven by one blow needle drive mechanism, and the thickness size requirement of the clamping plate 13 is relatively low.

[0041] In this embodiment, a mounting position matched with the clamping plate 13 is formed between the upper half mold 11 and the lower half mold 12. The clamping plate 13 is movably installed in the mounting position and can move in the mounting position along a direction perpendicular to the parting surface; a blow needle hole 131 matched with the blow needle 14 is provided in the clamping plate 13 along a direction perpendicular to the parting surface. The blow needle 14 is movably installed in the blow needle hole 131 and can move in the blow needle hole 131 along a direction perpendicular to the parting surface.

[0042] In this embodiment, the extrusion blow molding mold also includes a clamp plate driving mechanism and a blow needle driving mechanism; specifically, the clamp plate driving mechanism includes two clamp plate driving cylinders 2, which are respectively arranged on the left and right sides of the middle of the side mold 1 and are respectively connected to the clamp plates 13, and jointly drive the clamp plates 13 to move in a direction perpendicular to the parting surface; the blow needle driving mechanism includes a blow needle driving cylinder 3, which is arranged on the outer side of the middle of the side mold 1 and is connected to the blow needle 14, and drives the blow needle 14 to move in a direction perpendicular to the parting surface.

[0043] In order to improve the accuracy and movement balance when the two side molds 1 are closed and opened, in one of the side molds 1, guide pillars 15 are respectively provided on the parting surfaces of the upper mold half 11 and the lower mold half 12 in a direction perpendicular to the parting surfaces; in the other side mold 1, guide sleeves 16 are respectively provided on the parting surfaces of the upper mold half 11 and the lower mold half 12 in a direction perpendicular to the parting surfaces; the guide pillars 15 and the guide sleeves 16 are positioned correspondingly and matched with each other, and the two side molds 1 are closed or opened based on the cooperation between the guide pillars 15 and the guide sleeves 16.

[0044] In this embodiment, the inner side of the upper half mold 11 has an upper half cavity 111, the inner side of the lower half mold 12 has a lower half cavity 121, and the inner side of the clamping plate 13 has a clamping half cavity 132; when the two side molds 1 are connected along the parting surface, the two upper half cavities 111 of the two side molds 1 are combined to form an upper mold cavity, the two lower half cavities 121 of the two side molds 1 are combined to form a lower mold cavity, and the two clamping half cavities 132 of the two side molds 1 are combined to form a clamping cavity, the upper mold cavity and the lower mold cavity are connected through the clamping cavity, and the needle head of the blow needle 14 can be moved into the clamping cavity.

[0045] In this embodiment, the upper half mold 11 comprises an upper bottom half mold 112, an upper body half mold 113 and an upper mouth half mold 114 which are sequentially arranged along the longitudinal axis. The inner side of the upper bottom half mold 112 has an upper bottom half cavity, the inner side of the upper body half mold 113 has an upper body half cavity, the inner side of the upper mouth half mold 114 has an upper mouth half cavity, and the lower edge of the upper mouth half cavity is provided with an upper cutting blade 115. When the preform in the mold is blow-molded, the upper preform is cut and separated by the upper cutting blade 115. The upper mouth half mold 114 is connected to the bottom of the upper body half mold 113, and the upper bottom half mold 112 can move along the longitudinal axis. When the upper bottom half mold 112 moves along the longitudinal axis to connect with the upper body half mold 113, the upper bottom half cavity, the upper body half cavity and the upper mouth half cavity are connected to form the upper half cavity 111.

[0046] In this embodiment, the extrusion blow molding mold also includes an upper bottle bottom half mold driving mechanism; specifically, the upper bottle bottom half mold driving mechanism includes an upper bottle bottom half mold driving cylinder 4, which is arranged on the upper side of the side mold 1 and is connected to the upper bottle bottom half mold 112, driving the upper bottle bottom half mold 112 to move along the longitudinal axis; or, the upper bottle bottom half mold driving mechanism includes two upper bottle bottom half mold driving cylinders 4, which are respectively arranged on the left and right sides of the upper part of the side mold 1 and are respectively connected to the upper bottle bottom half mold 112, and jointly drive the upper bottle bottom half mold 112 to move along the longitudinal axis.

[0047] In this embodiment, the lower half mold 12 comprises a lower bottle mouth half mold 122, a lower bottle body half mold 123 and a lower bottle bottom half mold 124 which are sequentially arranged along the longitudinal axis. The lower bottle mouth half mold 122 has a lower bottle mouth half cavity on its inner side, and a lower cutting blade 125 is arranged on the upper edge of the lower bottle mouth half cavity. When the preform in the mold is blow-molded, the lower preform is cut and separated by the lower cutting blade 125. The lower bottle body half mold 123 has a lower bottle body half cavity on its inner side, and the lower bottle bottom half mold 124 has a lower bottle bottom half cavity on its inner side. The lower bottle mouth half mold 122 is connected to the top of the lower bottle body half mold 123, and the lower bottle bottom half mold 124 can move along the longitudinal axis. When the lower bottle bottom half mold 124 moves along the longitudinal axis to connect with the lower bottle body half mold 123, the lower bottle mouth half cavity, the lower bottle body half cavity and the lower bottle bottom half cavity are connected to form the lower half cavity 121.

[0048] In the present embodiment, the extrusion blow molding mold also includes a lower bottle bottom half mold driving mechanism; specifically, the lower bottle bottom half mold driving mechanism includes a lower bottle bottom half mold driving cylinder 5, which is arranged at the lower side of the side mold 1 and is connected to the lower bottle bottom half mold 124, driving the lower bottle bottom half mold 124 to move along the longitudinal axis; or, the lower bottle bottom half mold driving mechanism includes two lower bottle bottom half mold driving cylinders 5, which are respectively arranged on the left and right sides of the lower part of the side mold 1 and are respectively connected to the lower bottle bottom half mold 124, jointly driving the lower bottle bottom half mold 124 to move along the longitudinal axis.

[0049] In specific implementation, extrusion blow molding includes the following steps:

[0050] S1, forming a bottle blank, wherein the formed bottle blank comprises an upper bottle blank, a clamp and a lower bottle blank, and the upper bottle blank and the lower bottle blank are connected by the clamp;

[0051] S2, the clamp plate driving cylinder 2 drives the clamp plate 13 to move in a direction perpendicular to the parting surface, so that the clamp plate 13 extends and forms a clamping cavity, so that the clamp plate 13 clamps the clamping mouth of the bottle blank;

[0052] S3, the back plate drives the two side molds 1 to close the mold, so that the upper bottle blank is located in the formed upper mold cavity, and the lower bottle blank is located in the formed lower mold cavity; and during the closing process, the clamp plate drives the cylinder 2 to keep the clamp plate 13 in the extended position, and the clamp plate 13 keeps the clamp holding the bottle blank;

[0053] S4, the blow needle driving cylinder 3 drives the blow needle 14 to move in a direction perpendicular to the parting surface, and the needle head of the blow needle 14 moves to the clamping mouth of the bottle blank in the clamping mouth, and then the blow needle 14 is used to blow the bottle blank to form the upper bottle body and the lower bottle body in the upper mold cavity and the lower mold cavity respectively. At this time, the upper bottle body and the lower bottle body are still connected by the clamping mouth;

[0054] S5, the blow needle driving cylinder 3 drives the blow needle 14 to move in a direction perpendicular to the parting surface, and the needle head of the blow needle 14 is retracted into the clamping plate 13;

[0055] The upper bottle bottom half mold driving cylinder 4 drives the upper bottle bottom half mold 112 to move upward along the longitudinal axis direction, driving the upper bottle bottom half mold 112 to open the mold;

[0056] The lower bottle bottom half mold driving cylinder 5 drives the lower bottle bottom half mold 124 to move downward along the longitudinal axis direction, driving the lower bottle bottom half mold 124 to open the mold;

[0057] The back plate drives the two side molds 1 to open the mold. During the mold opening process, the clamp plate drives the cylinder 2 to keep the clamp plate 13 in the extended position, and the clamp plate 13 keeps the clamp holding the preform;

[0058] The upper bottle body is separated from the clamping mouth by the upper cutting blade 115, and the lower bottle body is separated from the clamping mouth by the lower cutting blade 125. After separation, the upper bottle body and the lower bottle body are taken out by a bottle taking tool;

[0059] The clamp plate driving cylinder 2 drives the clamp plate 13 to move in a direction perpendicular to the parting surface, so that the clamp plate 13 is retracted into the side mold 1 and the clamp is discarded.

[0060] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. An extrusion blow molding die, characterized in that: The side molds include two side molds which are mirror-symmetrical along the parting surface, the side molds include an upper half mold and a lower half mold which are sequentially arranged along the longitudinal axis, a clamping plate which can be moved in a direction perpendicular to the parting surface is movably installed between the upper half mold and the lower half mold, at least two blow pins which can be moved in a direction perpendicular to the parting surface are movably installed in the clamping plate, and the needles of the blow pins can be moved to the inner side of the clamping plate; Among them, at least one of the blow needles is located above the horizontal center plane of the clamping plate; at least one of the blow needles is located below the horizontal center plane of the clamping plate.

2. An extrusion blow molding mold according to claim 1, characterized in that: The needle tip of the blow needle is a beveled tip; At least one of the blow needles is in one of the side molds, and the bevel tip of the blow needle faces the upper mold; at least one of the blow needles is in the other side mold, and the bevel tip of the blow needle faces the lower mold.

3. An extrusion blow molding mold according to claim 1, characterized in that: A mounting position adapted to the clamping plate is formed between the upper half mold and the lower half mold, and the clamping plate is movably mounted in the mounting position and can move in the mounting position along a direction perpendicular to the parting surface; A blow pin hole matched with the blow pin is arranged in the clamping plate along a direction perpendicular to the parting surface. The blow pin is movably installed in the blow pin hole and can move in the blow pin hole along a direction perpendicular to the parting surface.

4. An extrusion blow molding die according to claim 1, characterized in that: The extrusion blow molding mold also includes a clamp plate driving mechanism and a blow needle driving mechanism; The clamp plate driving mechanism comprises two clamp plate driving cylinders, which are respectively arranged on the left and right sides of the middle part of the side mold and respectively connected to the clamp plate, and jointly drive the clamp plate to move in a direction perpendicular to the parting surface; The blow needle driving mechanism comprises a blow needle driving cylinder, which is arranged outside the middle part of the side mold and connected to the blow needle, and drives the blow needle to move in a direction perpendicular to the parting surface.

5. An extrusion blow molding mold according to claim 1, characterized in that: In one of the side molds, guide pillars are respectively provided on the parting surfaces of the upper half mold and the lower half mold in a direction perpendicular to the parting surfaces; In another side mold, guide sleeves are respectively provided on the parting surfaces of the upper half mold and the lower half mold in a direction perpendicular to the parting surfaces; The guide pin and the guide sleeve are positioned correspondingly and matched, and the two side molds are molded or opened based on the cooperation between the guide pin and the guide sleeve.

6. An extrusion blow molding die according to claim 1, characterized in that: The inner side of the upper half mold has an upper cavity, the inner side of the lower half mold has a lower cavity, and the inner side of the clamp plate has a clamp half cavity; when the two side molds are butted along the parting surface, the two upper half cavities of the two side molds are combined to form an upper mold cavity, the two lower half cavities of the two side molds are combined to form a lower mold cavity, and the two clamp half cavities of the two side molds are combined to form a clamp cavity, the upper mold cavity is connected to the lower mold cavity through the clamp cavity, and the needle head of the blow needle can be moved into the clamp cavity.

7. The extrusion blow molding die according to claim 6, characterized in that: The upper half mold comprises an upper bottle bottom half mold, an upper bottle body half mold and an upper bottle mouth half mold which are sequentially arranged along the longitudinal axis, the upper bottle bottom half mold has an upper bottle bottom half cavity on its inner side, the upper bottle body half mold has an upper bottle body half cavity on its inner side, the upper bottle mouth half mold has an upper bottle mouth half cavity on its inner side, and an upper cutting edge is provided on the lower edge of the upper bottle mouth half cavity; The upper bottle mouth half mold is connected to the bottom of the upper bottle body half mold, and the upper bottle bottom half mold can move along the longitudinal axis direction. When the upper bottle bottom half mold moves along the longitudinal axis direction to be connected with the upper bottle body half mold, the upper bottle bottom half cavity, the upper bottle body half cavity, and the upper bottle mouth half cavity are connected to form the upper half cavity.

8. An extrusion blow molding die according to claim 7, characterized in that: The extrusion blow molding mold also includes an upper bottle bottom half mold driving mechanism; The upper bottle bottom half mold driving mechanism comprises an upper bottle bottom half mold driving cylinder, which is arranged on the upper side of the side mold and connected to the upper bottle bottom half mold, driving the upper bottle bottom half mold to move along the longitudinal axis direction; Alternatively, the upper bottle bottom half mold driving mechanism includes two upper bottle bottom half mold driving cylinders, which are respectively arranged on the left and right sides of the upper part of the side mold and are respectively connected to the upper bottle bottom half mold, and jointly drive the upper bottle bottom half mold to move along the longitudinal axis direction.

9. An extrusion blow molding die according to claim 6, characterized in that: The lower half mold comprises a lower bottle mouth half mold, a lower bottle body half mold and a lower bottle bottom half mold which are sequentially arranged along the longitudinal axis, the lower bottle mouth half mold has a lower bottle mouth half cavity on its inner side, and a lower cutting edge is arranged on the upper edge of the lower bottle mouth half cavity, the lower bottle body half mold has a lower bottle body half cavity on its inner side, and the lower bottle bottom half mold has a lower bottle bottom half cavity on its inner side; The lower bottle mouth half mold is connected to the top of the lower bottle body half mold, and the lower bottle bottom half mold can move along the longitudinal axis direction. When the lower bottle bottom half mold moves along the longitudinal axis direction to be connected with the lower bottle body half mold, the lower bottle mouth half cavity, the lower bottle body half cavity, and the lower bottle bottom half cavity are connected to form the lower half cavity.

10. The extrusion blow molding die according to claim 9, characterized in that The extrusion blow molding mold also includes a lower bottle bottom half mold driving mechanism; The lower bottle bottom half mold driving mechanism comprises a lower bottle bottom half mold driving cylinder, which is arranged at the lower side of the side mold and connected to the lower bottle bottom half mold, and drives the lower bottle bottom half mold to move along the longitudinal axis direction; Alternatively, the lower bottle bottom half mold driving mechanism includes two lower bottle bottom half mold driving cylinders, which are respectively arranged on the left and right sides of the lower part of the side mold and are respectively connected to the lower bottle bottom half mold, and jointly drive the lower bottle bottom half mold to move along the longitudinal axis direction.

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