Method for processing blow molding products using extrusion blow molding molds
By setting the protrusion and groove on the extrusion blow mold and setting two sets of molds along the axis center of the container mold cavity, the protrusion is embedded in the groove, which solves the problem of large flying edge weight in traditional technology, and realizes the More efficient material utilization and lower manufacturing costs.
Patent Information
- Application Number
- CN202010365098.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2040-04-30
AI Technical Summary
When traditional extrusion blow molding processes process small-capacity containers, the weight of the flash accounts for a large proportion, resulting in the inability to efficiently separate and recycle the EVOH material, which increases the cost of container manufacturing.
Design a new extrusion blow mold. By setting the protrusion and groove on the end surface of the mold and two sets of molds along the axis center line of the container mold cavity, the protrusion is embedded in the groove, reducing the generation of flashes and improving Material utilization and mold butt consistency.
It significantly reduces the weight proportion of Feibian in blow-molded parts, reducing it by more than 30%, and improving processing efficiency and product sealing.
Smart Images
Figure CN111421790B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of plastic processing, and relates to a blow molding method, in particular to a method for processing blow molding products by using an extrusion blow molding mold. Background Art
[0002] Extrusion blow molding is a method of manufacturing hollow thermoplastic parts. The blow molding objects include bottles, barrels, cans, boxes and containers for packaging food, beverages, cosmetics, medicines and daily necessities.
[0003] The traditional extrusion blow molding process consists of five steps: 1. Extrusion of a plastic parison, i.e., a hollow plastic tube; 2. Closing the flap mold on the parison, clamping the mold and cutting off the parison; 3. Blowing the parison against the cold wall of the mold cavity, adjusting the opening and maintaining a certain pressure during cooling; 4. Opening the mold and removing the blown parts; 5. Trimming the flash to obtain the finished product. When using the traditional extrusion blow molding process to process small-capacity (less than 500ml) containers, the flash accounts for a large proportion of the weight of the blow-molded parts, usually more than 25%, or even more than 40%.
[0004] A container has an interlayer made of EVOH material, such as a method and apparatus for manufacturing a container (application number 200780009337.7), an outer container is made of PP or PET-G, and an inner bag is composed of three layers, EVOH, an adhesion promoter layer, Surlyn or Lupolen. The market price of EVOH is much higher than that of PP, PET-G, Surlyn or Lupolen. The EVOH layer in the flash cannot be separated efficiently, that is, the EVOH material cannot be recycled alone, so it is of great significance to reduce the weight proportion of the flash in the blow-molded parts, such as reducing the amount of EVOH used and reducing the manufacturing cost of the container. At present, people usually set two product molding parts in the mold cavity of the extrusion blow molding mold, and the mouth of the product is relatively set. For those skilled in the art, it is still hoped to propose more different technical solutions that can reduce the weight of the flash to meet different production needs. Summary of the invention
[0005] The invention proposes a method for processing blow-molded products by using an extrusion blow-molding mold. The technical problem to be solved by the invention is how to improve the processing efficiency of the extrusion blow-molded products.
[0006] The technical problem to be solved by the present invention can be achieved through the following technical solutions: an extrusion blow molding mold, comprising a mold body with a container mold cavity, characterized in that a convex head is provided on one end face of the mold body, and a groove is provided on the other end face of the mold body, and the convex head and the groove are arranged along the axial center line of the container mold cavity; when two sets of extrusion blow molding molds are arranged along the axial center line direction of the container mold cavity, one end face of one set of extrusion blow molding molds can be abutted against the other end face of the other set of extrusion blow molding molds, and the convex head of one set of extrusion blow molding molds is embedded in the groove of the other set of extrusion blow molding molds.
[0007] Compared with the prior art, the present extrusion blow molding mold has the following beneficial effects when two sets of extrusion blow molding molds are docked during use: 1. The distance between the two sets of extrusion blow molding molds is eliminated to avoid the formation of flash between the two sets of extrusion blow molding molds; 2. The groove is set so that the distance between the bottom surface of the groove and the end face of the container cavity is smaller than the distance between the end face of the container cavity and the end face of the mold body, thereby reducing the amount of flash generated between the end face of the container cavity and the end face of the mold body; 3. The convex head is embedded in the groove, which not only fully utilizes the parison in the groove, improves material utilization, reduces the amount of flash, but also improves the consistency and stability of the docking of the two sets of extrusion blow molding molds. The use of the present extrusion blow molding mold to produce products significantly reduces the weight proportion of flash in blow-molded parts, and the amount of flash generated is reduced by more than 30%.
[0008] In the above-mentioned extrusion blow molding mold, part of the container cavity is located inside the convex head, thus ensuring that the distance between the end face of the container cavity and the end face of the convex head is at a minimum value, avoiding an increase in the amount of flash generated between the end face of the container cavity and the end face of the convex head.
[0009] In the above-mentioned extrusion blow molding mold, the groove has a first abutment surface which is inclined, and the protrusion has a second abutment surface which is inclined and can match the first abutment surface; this is conducive to the protrusion being embedded in the groove and improves the docking consistency of the two sets of extrusion blow molding molds.
[0010] In the above-mentioned extrusion blow molding mold, the mold body includes a left half mold and a right half mold, the grooves and the protrusions are open along the parting surface, half of the grooves and the protrusions are located on the left half mold, and the other half of the grooves and the protrusions are located on the right half mold.
[0011] In the above-mentioned extrusion blow molding mold, the mold body has an auxiliary beading portion located between the bottom surface of the groove and the end surface of the container cavity, and the auxiliary beading portion has a receiving groove, which runs through the container cavity and the groove; when one end surface of a set of extrusion blow molding molds is abutted against the other end surface of another set of extrusion blow molding molds, a clamping seam cavity is formed between the protrusion and the wall of the groove. After the left half mold and the right half mold are closed, the auxiliary beading portion closes the tubular parison, and the extrusion deformation of the parison can be controlled by controlling the depth of the receiving groove, thereby improving the sealing of the closure. When the parison is squeezed by the protrusion and the auxiliary beading portion, most of the material flows into the clamping seam cavity, so that the product forms a clamping seam, further improving the sealing of the product. In the prior art, the clamping seam is formed in a set of extrusion blow molding molds, and the clamping seam cavity of the present technology requires two sets of extrusion blow molding molds to be docked to form.
[0012] Solution 1: A method for processing a blow-molded product using an extrusion blow-molding mold, characterized in that the method for processing a blow-molded product uses at least two sets of extrusion blow-molding molds arranged along the axial centerline direction of a container mold cavity, the two adjacent sets of extrusion blow-molding molds are respectively called a first mold and a second mold, and the second mold is located between the first mold and an extrusion device; the hollow plastic parison is extruded by the extrusion device and arranged along the axial centerline direction of the container mold cavity;
[0013] The method for processing a blow molded product comprises the following sequential steps: first, controlling the left half mold and the right half mold of a first mold to be closed, injecting compressed air into a parison in the first mold, inflating the parison, and maintaining a certain pressure during cooling; controlling the second mold to be in an open state, the second mold and the first mold are in a state of being dependent on each other, and a part of the parison is located between the left half mold and the right half mold of the second mold;
[0014] The second step is to control the left and right half molds of the second mold to close;
[0015] The third step is to inject compressed air into the parison in the second mold to inflate the parison and maintain a certain pressure during cooling;
[0016] The fourth step is to control the first mold or the second mold to move along the axis of the container mold cavity, so that the first mold is separated from the second mold, and the parison is broken between the first mold and the second mold.
[0017] Solution 2: A method for processing blow-molded products using an extrusion blow-molding mold, characterized in that the method for processing blow-molded products uses at least two sets of extrusion blow-molding molds arranged along the axial centerline direction of the container mold cavity, the two adjacent sets of extrusion blow-molding molds are respectively called a first mold and a second mold, and the second mold is located between the first mold and the extrusion device; the hollow plastic parison is extruded by the extrusion device and arranged along the axial centerline direction of the container mold cavity;
[0018] The method for processing a blow molded product comprises the following sequential steps: first, controlling the left and right half molds of a first mold to be closed, injecting compressed air into a parison in the first mold, inflating the parison, and maintaining a certain pressure during cooling; controlling the second mold to be in an open state, with part of the parison located between the left and right half molds of the second mold, and leaving only a small gap between the second mold and the first mold;
[0019] The second step is to first control the left and right half molds of the second mold to close, and then control the first mold or the second mold to move along the axis of the container mold cavity, so that the first mold and the second mold are in a state of relying on each other;
[0020] The third step is to inject compressed air into the parison in the second mold to inflate the parison and maintain a certain pressure during cooling;
[0021] The fourth step is to control the first mold or the second mold to move along the axis of the container mold cavity, so that the first mold is separated from the second mold, and the parison is broken between the first mold and the second mold.
[0022] Compared with the prior art, after the first mold and the second mold are separated, the parts being blown in the first mold are completely separated from the parts being blown in the second mold, and the position of the breaking line coincides with the top surface of the convex head of the first mold. Therefore, no flash will be left in the groove of the second mold, that is, the bottom of the container does not need to be flash trimmed, thereby improving the processing efficiency of the extrusion blow molding products.
[0023] In the second scheme, a small gap of 0.5mm-2mm is left between the second mold and the first mold, and then the second mold is closed and the second mold is leaning against the first mold, so that the parison between the second mold and the first mold is squeezed into the clamping seam cavity, increasing the total amount of material in the clamping seam cavity, thereby improving the sealing of the bottom of the container. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 and Figure 2 It is a schematic diagram of the three-dimensional structure of the extrusion blow molding mold from different viewing angles.
[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the half mold of the extrusion blow molding mold.
[0026] Figure 4 It is a schematic diagram of the main structure of the extrusion blow molding mold.
[0027] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of AA.
[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of two sets of extrusion blow molding molds stacked together.
[0029] Figure 7 It is a schematic diagram of the cross-sectional structure of two sets of extrusion blow molding molds stacked together.
[0030] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure of BB.
[0031] Fig. 9 yes Figure 8 Enlarged view of the structure at point C in the middle.
[0032] Fig.10 It is a schematic diagram of the cross-sectional structure of the second step in the method for processing blow molding products.
[0033] Fig.11 It is a schematic diagram of the cross-sectional structure in which only the mold is in a closed state in the third step of the blow molding product processing method.
[0034] Fig.12 It is a schematic cross-sectional view of the third step of the blow molding product processing method, in which the parison is in a blown state.
[0035] Fig.13 It is a schematic cross-sectional view of the state in the fourth step of the blow molding product processing method.
[0036] Fig.14 It is a schematic diagram of the cross-sectional structure of a blow molded part.
[0037] Fig.15 It is a schematic diagram of the structure of blow molded parts cut into finished products and flash.
[0038] In the figure, 1, left half mold; 2, right half mold; 3, container forming part; 4, connecting neck; 5, blow molding needle avoidance hole; 6, convex head; 6a, first inclined surface; 6b, second abutment surface; 7, groove; 7a, first abutment surface; 8, auxiliary pressure strip part; 8a, receiving groove; 9, clamping seam cavity; 10, parison; 11, first mold; 12, second mold; 13, extrusion device; 14, parts; 14a, plastic bottle; 14a1, bottle body; 14a2, clamping seam; 14b, connecting neck. DETAILED DESCRIPTION
[0039] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0040] Embodiment 1: Figures 1 to 5As shown, an extrusion blow molding mold includes a mold body having a container mold cavity and a blow molding needle avoidance hole 5; the container mold cavity includes a container molding part 3 and a connecting neck 4 connecting the container molding part 3 and the blow molding needle avoidance hole 5. A convex head 6 is provided on one end surface of the mold body, and a concave groove 7 is provided on the other end surface of the mold body. The two end surfaces are arranged oppositely, and the convex head 6 and the concave groove 7 are arranged along the axis of the container mold cavity.
[0041] The mold body comprises a left mold half 1 and a right mold half 2, and both the left mold half 1 and the right mold half 2 have a container half mold cavity and a blow molding needle avoidance half hole; when the left mold half 1 and the right mold half 2 are closed, the container half mold cavity on the left mold half 1 and the container half mold cavity on the right mold half 2 form a container mold cavity, and the blow molding needle avoidance half hole on the left mold half 1 and the blow molding needle avoidance half hole on the right mold half 2 form a blow molding needle avoidance half hole. The groove 7 and the convex head 6 are both opened along the parting surface, half of the groove 7 and the convex head 6 are located on the left mold half 1, and the other half of the groove 7 and the convex head 6 are located on the right mold half 2.
[0042] The connecting neck 4 in the container mold cavity extends into the convex head 6, and the inner side surface of the convex head 6 is inclined. The outer end surface of the convex head 6 on the left half mold 1 and the parting surface are transitioned by a first inclined surface 6a, and the outer end surface of the convex head 6 on the right half mold 2 and the parting surface are also transitioned by a first inclined surface 6a, so that the distance between the outer side surface and the inner side surface of the convex head 6 is the smallest at the parting surface, and the above-mentioned minimum distance is 4mm-7mm, so that the preform 10 is easier to be torn at the convex head 6.
[0043] The part between the bottom surface of the groove 7 and the end surface of the container mold cavity in the mold body is the auxiliary beading part 8, and the auxiliary beading part 8 has a receiving groove 8a on the parting surface, and the receiving groove 8a penetrates the container mold cavity and the groove 7; the receiving groove 8a is provided to prevent the parison 10 from being easily broken at the auxiliary beading part 8. By controlling the depth of the receiving groove 8a, the extrusion deformation of the parison 10 when the left half mold 1 and the right half mold 2 are in the closed state can be controlled, and at the same time, the thickness of the auxiliary beading part 8 can be controlled to improve the sealing of the bottom of the container; the thickness of the auxiliary beading part 8 is 4mm-7mm.
[0044] The groove 7 has two inclined first abutting surfaces 7a, one of which is located on the left half mold 1 and the other is located on the right half mold 2, and the two first abutting surfaces 7a are arranged opposite to each other. The convex head 6 has an inclined second abutting surface 6b that can match the first abutting surface 7a; there are also two second abutting surfaces 6b, which are arranged opposite to each other, one of which is located on the left half mold 1 and the other is located on the right half mold 2.
[0045] like Figures 6 to 9As shown, when two sets of extrusion blow molding molds are arranged along the axial direction of the container mold cavity, one end face of one set of extrusion blow molding molds is abutted against the other end face of the other set of extrusion blow molding molds, and the protrusion 6 of one set of extrusion blow molding molds is embedded in the groove 7 of the other set of extrusion blow molding molds; a clamping seam cavity 9 is formed between the protrusion 6 and the wall of the groove 7.
[0046] like Figures 10 to 13 As shown, the functions and advantages of each structure are further explained by describing a method for processing a blow-molded product using an extrusion blow-molding mold, and the blow-molded product is a plastic bottle 14a.
[0047] The method for processing blow molding products uses at least two sets of extrusion blow molding molds, and the extrusion blow molding molds are vertically arranged, that is, the parting surface is vertically arranged, the convex head 6 is located at the top, and the groove 7 is located at the bottom. The extrusion blow molding mold is installed on the mold frame, and the extrusion blow molding mold can be lifted and moved, and the left half mold 1 and the right half mold 2 of the extrusion blow molding mold can be switched between an open state and a closed state. All the extrusion blow molding molds are arranged along the axial centerline direction of the container mold cavity, that is, all the extrusion blow molding molds are arranged in series up and down, and all the extrusion blow molding molds are sequentially called the first mold 11, the second mold 12...the Nth mold from bottom to top.
[0048] The extrusion head of the extrusion device 13 is located above the extrusion blow molding die. The extrusion device 13 is used to extrude the hollow plastic preform 10, and the preform 10 sags naturally and is arranged along the axial centerline direction of the container mold cavity. The convex head 6 and the concave groove 7 are both strip-shaped, and the length of the convex head 6 and the concave groove 7 is controlled to match the diameter of the preform 10 to ensure the sealing of the bottom of the plastic bottle.
[0049] The method for processing blow molded products comprises the following steps in sequence, the first step being: Fig.10 As shown, the left half mold 1 and the right half mold 2 of the first mold 11 are controlled to be closed, and compressed air is injected into the parison 10 located in the first mold 11 to inflate the parison 10, and a certain pressure is maintained during cooling; the second mold 12 is controlled to be in an open state, and the second mold 12 and the first mold 11 are in a state of relying on each other, and part of the parison 10 is located between the left half mold 1 and the right half mold 2 of the second mold 12.
[0050] When the left half mold 1 and the right half mold 2 of the first mold 11 are switched from an open state to a closed state, the protruding head 6 extrude and deform the parison 10, and the material flowing during the extrusion deformation is located in the space between the two first inclined surfaces 6a, that is, the space between the two first inclined surfaces 6a is used to limit the flow range of the material during the extrusion deformation, so as to avoid the adverse effects of disordered material flow on the product, such as the material flowing to the overlap of the two sets of extrusion blow molds, resulting in a decrease in the overlap fit between the upper and lower sets of extrusion blow molds.
[0051] The second step is, Fig.11As shown, the left half mold 1 and the right half mold 2 of the second mold 12 are controlled to be closed. When the left half mold 1 and the right half mold 2 of the second mold 12 are switched from the open state to the closed state, the protruding head 6 squeezes and deforms the parison 10, and the material that is squeezed and deformed and flows is located in the space between the two first inclined surfaces 6a. At the same time, the auxiliary pressure strip part 8 squeezes and deforms the parison 10, and part of the material flows into the clamping seam cavity 9. By controlling the size of the clamping seam cavity 9, it is ensured that the material fills the clamping seam cavity 9.
[0052] The third step is Fig.12 As shown, compressed air is injected into the parison 10 in the second mold 12 to inflate the parison 10, and a certain pressure is maintained during cooling.
[0053] The fourth step is Fig.13 As shown, the first mold 11 or the second mold 12 is controlled to move along the axial direction of the container mold cavity, so that the first mold 11 is separated from the second mold 12, and the parison 10 is broken between the first mold 11 and the second mold 12, specifically, it is broken at the bottom edge of the clamping seam 14a2, and the clamping seam 14a2 formed in the clamping seam cavity 9 is a part of the blow-molded part 14 of the second mold 12.
[0054] Step 5: Open the first mold 11 and remove the blown part 14. Fig.14 As shown, the part 14 includes a bottle body 14a1 formed in the container molding portion 3, a connecting neck 14b formed in the connecting neck 4, and a clamping seam 14a2 formed in the clamping seam cavity 9, the connecting neck 14b is connected to the mouth of the bottle body 14a1, the clamping seam 14a2 is connected to the bottom of the bottle body 14a1 as a whole, and the clamping seam 14a2 can improve the sealing and strength of the bottom of the plastic bottle 14a.
[0055] Step 6: Fig.15 As shown, the connecting neck 14b in the part 14 is cut off to obtain the finished plastic bottle 14a. Compared with the prior art, the bottom of the plastic bottle 14a does not need to be processed by flash cutting, and the weight of the part cut off above the mouth of the plastic bottle 14a is reduced.
[0056] Embodiment 2: The structure and principle of this embodiment are basically the same as those of the embodiment 1. The basic similarities are not described in detail. Only the differences are described. The differences are as follows: in the first step, the second mold 12 and the first mold 11 are not in a state of dependence, but only a small gap of 0.5mm-2mm is left between the second mold 12 and the first mold 11. In the second step, the left half mold 1 and the right half mold 2 of the second mold 12 are first controlled to close, and then the first mold 11 or the second mold 12 is controlled to move along the axis of the container mold cavity, so that the first mold 11 and the second mold 12 are in a state of dependence.
Claims
1. A method for processing a blow molded product using an extrusion blow molding mold, the extrusion blow molding mold comprising a mold body having a container mold cavity, a convex head (6) on one end surface of the mold body, a concave groove (7) on the other end surface of the mold body, the convex head (6) and the concave groove (7) being arranged along the axis of the container mold cavity; when two sets of extrusion blow molding molds are arranged along the axis of the container mold cavity, one end surface of one set of extrusion blow molding molds can abut against the other end surface of the other set of extrusion blow molding molds, and the convex head (6) of one set of extrusion blow molding molds is embedded in the concave groove (7) of the other set of extrusion blow molding molds; characterized in that The method for processing a blow-molded product comprises at least two sets of extrusion blow-molding molds arranged along the axis direction of a container mold cavity, and an extrusion device (13) is used to extrude a hollow plastic parison (10) arranged along the axis direction of the container mold cavity; the two adjacent sets of extrusion blow-molding molds are respectively referred to as a first mold (11) and a second mold (12), and the second mold (12) is located between the first mold (11) and the extrusion device (13); The method for processing a blow-molded product comprises the following sequential steps: first, controlling the left half mold (1) and the right half mold (2) of a first mold (11) to be closed, injecting compressed air into a parison (10) located in the first mold (11), inflating the parison (10), and maintaining a certain pressure during cooling; controlling the second mold (12) to be in an open state, the second mold (12) and the first mold (11) to be in a state of being dependent on each other, and a part of the parison (10) being located between the left half mold (1) and the right half mold (2) of the second mold (12); The second step is to control the left half mold (1) and the right half mold (2) of the second mold (12) to close; The third step is to inject compressed air into the parison (10) in the second mold (12) to inflate the parison (10), and to maintain a certain pressure during cooling; The fourth step is to control the first mold (11) or the second mold (12) to move along the axis of the container mold cavity, so that the first mold (11) is separated from the second mold (12), and the parison (10) is broken between the first mold (11) and the second mold (12); The method for processing a blow-molded product comprises the following sequential steps: first, controlling the left half mold (1) and the right half mold (2) of a first mold (11) to be closed, injecting compressed air into a parison (10) located in the first mold (11), inflating the parison (10), and maintaining a certain pressure during cooling; controlling the second mold (12) to be in an open state, with a portion of the parison (10) located between the left half mold (1) and the right half mold (2) of the second mold (12), and leaving only a small gap between the second mold (12) and the first mold (11); The second step is to first control the left half mold (1) and the right half mold (2) of the second mold (12) to close, and then control the first mold (11) or the second mold (12) to move along the axis of the container mold cavity, so that the first mold (11) and the second mold (12) are in a state of relying on each other; The third step is to inject compressed air into the parison (10) in the second mold (12) to inflate the parison (10), and to maintain a certain pressure during cooling; The fourth step is to control the first mold (11) or the second mold (12) to move along the axis of the container mold cavity, so that the first mold (11) is separated from the second mold (12), and the parison (10) is broken between the first mold (11) and the second mold (12).
2. The method for processing blow molded products using an extrusion blow molding mold according to claim 1, characterized in that: The mold body comprises an auxiliary beading portion (8) located between the bottom surface of the groove (7) and the end surface of the container cavity, and the auxiliary beading portion (8) comprises a receiving groove (8a), and the receiving groove (8a) passes through the container cavity and the groove (7); when one end surface of a set of extrusion blow molding molds abuts against another end surface of another set of extrusion blow molding molds, a clamping seam cavity (9) is formed between the protrusion (6) and the wall of the groove (7); after the parison (10) is broken between the first mold (11) and the second mold (12), the clamping seam (14a2) formed in the clamping seam cavity (9) is a part of the blow molding part (14) of the second mold (12).
3. The method for processing blow molded products using an extrusion blow mold according to claim 1 or 2, characterized in that: The gap is 0.5mm-2mm.
4. The method for processing blow molded products using an extrusion blow mold according to claim 1, characterized in that: The protrusion (6) and the groove (7) are both in the shape of strips.
5. The method for processing blow molded products using an extrusion blow mold according to claim 1, characterized in that: The container mold cavity extends into the convex head (6).
6. The method for processing blow molded products using an extrusion blow mold according to claim 1, characterized in that: The groove (7) has a first abutment surface (7a) which is arranged obliquely, and the protrusion (6) has a second abutment surface (6b) which is arranged obliquely and can match the first abutment surface (7a).
7. The method for processing blow molded products using an extrusion blow mold according to claim 1, 4, 5 or 6, characterized in that: The mold body comprises a left half mold (1) and a right half mold (2), the groove (7) and the protrusion (6) are both opened along the parting surface, half of the groove (7) and the protrusion (6) are located on the left half mold (1), and the other half of the groove (7) and the protrusion (6) are located on the right half mold (2).
8. The method for processing blow molded products using an extrusion blow mold according to claim 7, characterized in that: A first inclined surface (6a) is used for transition between the outer end surface of the convex head (6) on the left half mold (1) and the parting surface, and a first inclined surface (6a) is also used for transition between the outer end surface of the convex head (6) on the right half mold (2) and the parting surface.
9. The method for processing blow molded products using an extrusion blow mold according to claim 1, 4, 5 or 6, characterized in that: The mold body comprises an auxiliary pressure strip portion (8) located between the bottom surface of the groove (7) and the end surface of the container mold cavity, and the auxiliary pressure strip portion (8) comprises a receiving groove (8a), and the receiving groove (8a) passes through the container mold cavity and the groove (7); when one end surface of one set of extrusion blow molding molds abuts against another end surface of another set of extrusion blow molding molds, a clamping seam cavity (9) is formed between the protrusion (6) and the wall of the groove (7).