Plastic bottle processing mold and preparation method for producing plastic bottle by using same

Abstract

The invention relates to a plastic bottle processing mold and a preparation method for producing a plastic bottle by using the mold, and relates to the technical field of mold equipment. The plastic bottle processing mold comprises a fixed mold body and a movable mold body, cavities are formed in the fixed mold body and the movable mold body respectively, a protruding part is arranged in each cavity, the ends, away from the corresponding cavities, of the two protruding parts abut against each other, and air containing grooves are formed in the ends, close to each other, of the two protruding parts respectively. A material containing groove is formed in the inner wall, away from the other protruding part, of each gas containing groove. Compared with the prior art, the mold has the following beneficial effects that gas between the two protruding parts can be reserved in the gas containing groove after the fixed mold and the movable mold are closed, so that the gas amount on the outer edges of the protruding parts after mold closing is reduced, a parison material between the plastic bottle handle and the main body can be clamped into the material containing groove by the protruding parts, and bubbles in the material containing groove are prevented from falling off. And blank waste can be removed together, and the bubble amount at the handle after forming is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of plastic bottle processing, and in particular to a plastic bottle processing mold and a preparation method of producing plastic bottles using the mold. Background Art

[0002] With the continuous development of social economy and the increasing level of science and technology, my country's manufacturing industry is also booming. Plastic bottles are blow-molded parts made of materials such as polyethylene or polypropylene, with a variety of organic solvents added. They can package liquid objects and play an important role in people's lives and industry. Plastic bottle processing molds are equipment for producing plastic bottles, which can make plastic bottles blow-molded.

[0003] In the prior art, there is a processing mold for a plastic bottle with a handle, which includes a fixed mold and a movable mold. The fixed mold and the movable mold are both provided with a cavity on one side close to each other. A convex portion is provided on the inner wall of each cavity. The convex portion is located at the hollow area between the bottom end of the handle on the plastic bottle and the top wall of the bottle body to fill the area. When in use, the extrusion device squeezes the plastic into the mold cavity, and then the movable mold and the fixed mold begin to close the mold. When closing the mold, the convex portions are close to each other. After the closing of the mold is completed, the blowing device blows air into the fixed mold and the movable mold, so that the plastic bottle can be blow-molded.

[0004] Regarding the above-mentioned related technologies, as the fixed mold and the movable mold are in the process of closing the mold, the raised parts in the mold cavities of the fixed mold and the movable mold will gradually approach and finally stick to each other, which will cause the air between the two raised parts to be squeezed to the outside of the raised parts, so that there is more air in the mold cavity, and there will be more bubbles in the handle of the plastic bottle after blow molding, which reduces the strength of the handle of the plastic bottle, so it needs to be improved. Summary of the invention

[0005] In order to reduce bubbles at the handle of a plastic bottle after injection molding, the present application provides a plastic bottle processing mold and a preparation method of producing a plastic bottle using the mold.

[0006] In the first aspect, the present application provides a plastic bottle processing mold, which adopts the following technical solution: A plastic bottle processing mold includes a fixed mold and a movable mold, wherein the fixed mold and the movable mold are both provided with a cavity, each of the cavities is provided with a protrusion, two protrusions abut against each other at one end away from their respective corresponding cavities, air containing grooves are provided on one end of the two protrusions close to each other, and each of the air containing grooves is provided with a material containing groove on the inner wall away from the other protrusion.

[0007] By adopting the above technical scheme, compared with the prior art, during the process of closing the fixed mold and the movable mold, there is more air in the mold cavity, so that there will be more bubbles at the handle of the plastic bottle after blow molding. The present application opens the air containing groove and the material containing groove, so that the gas between the two protrusions can remain in the air containing groove after the fixed mold and the movable mold are closed, thereby effectively reducing the amount of gas at the outer edge of the protrusion after closing the mold, and reducing the amount of bubbles at the handle after molding; and the blank material between the handle and the main body of the plastic bottle can be clamped into the material containing groove by the protrusion, so that the bubbles in the material containing groove can be removed together after the blank waste in the material containing groove is cut off, thereby reducing the amount of bubbles at the handle of the plastic bottle after molding, and improving the strength of the handle of the plastic bottle after molding.

[0008] Preferably, a guide rod is provided on a side wall of the movable mold close to the fixed mold, and the guide rod is inserted in the fixed mold. A guide groove for inserting the guide rod is also provided on a side wall of the fixed mold close to the movable mold.

[0009] By adopting the above technical solution, the guide rod is set so that when the movable mold and the fixed mold are closed, the guide rod can be inserted into the guide groove, thereby realizing the positioning of the movable mold, improving the stability of the displacement of the movable mold during the closing process, and then ensuring the accuracy when the fixed mold and the movable mold are closed, and ensuring the blow molding effect of the plastic bottle.

[0010] Preferably, an additional frame is provided on one end of the guide rod close to the fixed mold, and a locking mechanism is also provided in the fixed mold. The locking mechanism includes a locking frame and a driving component. The locking frame is slidably connected to the inner wall of the fixed mold, and a locking groove is provided on the additional frame. The guide rod drives the locking frame to slide through the driving component and is inserted into the locking groove.

[0011] By adopting the above technical solution, the additional frame and the locking mechanism are arranged so that when the guide rod is inserted into the guide groove, the guide rod can drive the locking frame to slide through the driving component, so that the locking frame is displaced in the direction close to the additional frame, and finally inserted into the locking groove on the additional frame, thereby locking the additional frame and thus locking the guide rod, increasing the fit between the fixed mold and the movable mold after mold closing, thereby reducing the amount of flash on the plastic bottle after blow molding, and ensuring the quality of the plastic bottle after blow molding.

[0012] Preferably, the driving assembly includes an abutment frame and a driving frame, the abutment frame is slidably connected to the fixed mold, the abutment frame is located on the displacement path of the guide rod, one end of the driving frame is rotatably connected to the abutment frame, the other end of the driving frame is rotatably connected to the locking frame, and the driving frame is away from one end of the abutment frame and is inclined toward a side close to the guide rod.

[0013] By adopting the above technical solution, the driving component is set so that the guide rod can gradually approach the abutment frame and contact with the abutment frame during the process of being inserted into the guide groove, thereby pushing the abutment frame to slide. During the sliding process of the abutment frame, the abutment frame can drive the position of the driving frame to change, thereby causing the top end of the driving frame to change, so that the driving frame drives the locking frame to slide in the direction close to the additional frame, and finally inserted into the locking groove. By locking the additional frame, the guide rod is locked, thereby increasing the fit between the fixed mold and the movable mold after the mold is closed.

[0014] Preferably, an electromagnet is further provided in the fixed mold, the electromagnet is located on the sliding path of the abutment frame, and the electromagnet is used to adsorb the abutment frame.

[0015] By adopting the above technical solution, the electromagnet is set so that when the guide rod pushes the abutment frame to slide and the end of the abutment frame contacts the electromagnet, the electromagnet is energized to generate electromagnetic force itself, and magnetically adsorbs the abutment frame, so that the abutment frame maintains its own position, locks the locking frame, and ensures the locking effect of the guide rod, thereby further increasing the fit between the fixed mold and the movable mold after the mold is closed, further reducing the amount of flash on the plastic bottle after blow molding, and ensuring the quality of the plastic bottle after blow molding.

[0016] Preferably, a return spring is further provided on the abutment frame, and the return spring is located on a side of the abutment frame away from the guide rod, one end of the return spring abuts against the abutment frame, and the other end of the return spring abuts against the inner wall of the fixed mold.

[0017] By adopting the above technical solution, the reset spring is set so that when the abutment frame is pushed by the guide rod and slides, the abutment frame pushes one end of the reset spring, so that the reset spring is compressed, thereby storing elastic potential energy. After the electromagnet is powered off and the guide rod slides out of the guide groove with the movable mold, the reset spring continues to apply elastic force to the abutment frame, so that the abutment frame gradually returns to its initial position, thereby resetting the abutment frame and ensuring the subsequent normal use of the abutment frame.

[0018] Preferably, the additional frame is slidably connected to the guide rod, and a retaining assembly is further provided on the guide rod. The fixed mold drives the additional frame to slide relative to the guide rod through the retaining assembly.

[0019] By adopting the above technical solution, the additional frame and the fixing assembly are arranged so that after the guide rod is inserted into the guide groove and the locking groove corresponds to the locking frame, the fixed mold can drive the additional frame to slide relative to the guide rod through the fixing assembly, so that the additional frame remains unchanged relative to the fixed mold, and the locking groove on the additional frame maintains a corresponding relationship with the locking frame, so that the locking frame can be smoothly inserted into the locking groove to lock the additional frame, and the probability of collision between the additional frame and the locking frame is also reduced, thereby ensuring the normal use and service life of the additional frame and the locking frame.

[0020] Preferably, the retaining assembly includes a rotating cylinder and a driving rod, one end of the rotating cylinder is sleeved on the end of the guide rod close to the fixed mold and is rotatably connected to the guide rod, the other end of the rotating cylinder is sleeved on the additional frame and is threadedly connected to the additional frame, the driving rod is connected to the outer wall of the rotating cylinder, a spiral groove is opened on the fixed mold, and the driving rod is located in the spiral groove.

[0021] By adopting the above technical solution, the specific arrangement of the retaining assembly enables, after the guide frame is inserted into the guide groove, when the locking groove on the additional frame is displaced to a position corresponding to the locking frame, the driving rod on the rotating cylinder is displaced into the spiral groove, so that the outer wall of the driving rod contacts the inner wall of the spiral groove, and drives the rotating cylinder to rotate together. The rotation of the rotating cylinder causes the thread on the additional frame to be gradually screwed into the rotating cylinder, so that the additional frame is displaced relative to the guide rod, and the position of the additional frame in the fixed mold remains unchanged, thereby The locking groove on the additional frame maintains a corresponding relationship with the locking frame, so that the locking frame can be smoothly inserted into the locking groove, thereby ensuring the locking effect of the additional frame; and the threaded connection between the additional frame and the rotating cylinder enables the additional frame to be screwed into the rotating cylinder when the locking frame is inserted into the locking groove, which can further reduce the probability of relative displacement between the additional frame and the rotating cylinder, so that under the premise of the electromagnet locking abutment frame, the additional frame is further locked, thereby ensuring the fit between the fixed mold and the movable mold, and reducing the amount of flash on the plastic bottle after injection molding.

[0022] On the other hand, the present application also provides a method for producing a plastic bottle using the mold, comprising the following steps: Extrusion: Add the plastic raw materials into the extruder to melt and extrude the plastic preform; Mold closing: Add the plastic preform into the cavity of the processing mold, then drive the movable mold to move, perform rapid mold closing, and after rapid mold closing, perform high-pressure mold locking; Blowing: After the mold is closed, the compressed air is introduced into the mold cavity to blow the plastic preform in the cavity. Pressure holding: The pressure in the mold cavity is kept stable by means of a pressure holding device; Exhaust: Exhaust the gas in the mold cavity; Demoulding: driving the movable mould away from the fixed mould for demoulding; Deburring: Cut off the excess parts of the plastic bottle produced after blow molding to remove the burrs; Leak detection: Move the plastic bottle to the leak detector to detect whether the plastic bottle leaks; Packaging and warehousing: Move the qualified plastic bottles after leak detection to the packaging area for packaging and warehousing.

[0023] Preferably, a slow mold closing step is provided between the rapid mold closing and the high-pressure mold locking in the mold closing step, and the moving speed of the movable mold during the slow mold closing is lower than the moving speed of the movable mold during the rapid mold closing.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The air groove and the material groove are opened so that the gas between the two protrusions can be retained in the air groove after the fixed mold and the movable mold are molded together, thereby effectively reducing the amount of gas on the outer edge of the protrusion after the mold is molded together, and reducing the amount of bubbles at the handle after molding. When the fixed mold and the movable mold are molded together, the blank material between the handle and the main body of the plastic bottle can be clamped into the material groove by the protrusion, so that the bubbles in the material groove can be removed together after the waste of the blank in the material groove is cut off, thereby reducing the amount of bubbles at the handle of the plastic bottle after molding, improving the strength of the handle of the plastic bottle after molding, and ensuring the quality of the plastic bottle after molding; 2. The arrangement of the guide rod, the additional frame and the locking assembly enables the guide rod to drive the locking frame to slide through the driving assembly during the process of inserting the guide rod into the guide groove, so that the locking frame moves toward the additional frame and is finally inserted into the locking groove on the additional frame, thereby locking the additional frame and thus locking the guide rod, thereby increasing the fit between the fixed mold and the movable mold after mold closing, thereby reducing the amount of flash on the plastic bottle after blow molding, and ensuring the quality of the plastic bottle after blow molding; 3. The setting of the retaining component is such that when the locking groove on the additional frame is displaced to the position corresponding to the locking frame, the outer wall of the driving rod on the rotating cylinder contacts the inner wall of the spiral groove, thereby driving the rotating cylinder to rotate together, so that the thread on the additional frame is gradually screwed into the rotating cylinder, so that the additional frame is displaced relative to the guide rod and the position of the additional frame in the fixed mold remains unchanged. The locking groove and the locking frame maintain a corresponding relationship, so that the locking frame can be smoothly inserted into the locking groove to ensure the locking effect of the additional frame. Moreover, the way in which the additional frame is screwed into the rotating cylinder can further lock the additional frame under the premise of the electromagnet locking abutment frame, thereby ensuring the fit between the fixed mold and the movable mold and reducing the amount of flash on the plastic bottle after injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram used to reflect the overall plastic bottle processing mold in Example 1 of the present application.

[0026] Figure 2 It is a structural schematic diagram used to reflect the raised portion in Example 1 of the present application.

[0027] Figure 3 It is a schematic diagram used to reflect the overall plastic bottle processing mold in Example 2 of the present application.

[0028] Figure 4 It is a structural schematic diagram used to reflect the retention component in Example 2 of the present application.

[0029] Figure 5 It is a structural schematic diagram used to reflect the additional rack in Example 2 of the present application.

[0030] Figure 6 It is a structural schematic diagram used to embody the spiral groove in Example 2 of the present application.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. fixed mold; 11. guide groove; 12. give way groove; 13. spiral groove; 2. movable mold; 21. guide rod; 211. sliding block; 3. cavity; 4. raised portion; 41. air containing groove; 42. material containing groove; 5. additional frame; 51. locking groove; 6. retaining assembly; 61. rotating cylinder; 62. driving rod; 7. locking mechanism; 71. locking frame; 711. locking portion; 72. driving assembly; 721. abutting frame; 7211. abutting portion; 7222. sliding portion; 722. driving frame; 73. reset spring; 8. electromagnet. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-6 This application is described in further detail.

[0033] Embodiment 1: Example 1 of the present application discloses a plastic bottle processing mold. Figure 1 and Figure 2 The plastic bottle processing mold includes a fixed mold 1 and a movable mold 2. A cavity 3 is provided on one side wall of the fixed mold 1 and the movable mold 2 that are close to each other. A protrusion 4 is provided in each cavity 3. Two protrusions 4 are abutted against each other at one end away from the corresponding cavity 3. An air-containing groove 41 is provided on one end of the two protrusions 4 that are close to each other. A material-containing groove 42 is provided on the inner wall of each air-containing groove 41 that is away from another protrusion 4.

[0034] Reference Figure 2In the embodiment of the present application, the material containing groove 42 is opened at the center of the original gas containing groove 41, so that the gas containing groove 41 is annular and surrounds the outer side of the material containing groove 42 to increase the gas containing performance of the gas containing groove 41 and increase the gas amount in the gas containing groove 41 when the mold is closed.

[0035] Reference Figure 2 The existence of the gas groove 41 and the material groove 42 allows the gas retained between the two protrusions 4 to be located in the gas groove 41 and the material groove 42 during the mold closing process, thereby reducing the amount of gas at the outer edge of the protrusion 4, and further reducing the amount of bubbles at the handle of the plastic bottle after blow molding. At the same time, the material groove 42 can clamp the waste of the preform between the protrusions 4, so that the waste of the preform is located in the material groove 42, so that it can be centrally removed after molding and demolding, reducing the adverse effects on the handle.

[0036] Reference Figure 2 At the intersection of the air groove 41 and the material groove 42, a guide surface is provided between the air groove 41 and the side wall of the raised portion 4 to guide the gas and preform waste retained between the raised portions 4, so that the gas retained between the raised portions 4 can smoothly enter the air groove 41 and the material groove 42, and the preform waste can smoothly enter the material groove 42, thereby ensuring the strength of the handle.

[0037] Reference Figure 1 and Figure 2 , a guide rod 21 is also provided on the side wall of the movable mold 2 close to the fixed mold 1. In the embodiment of the present application, the number of guide rods 21 on both ends of the movable mold 2 along its length direction is set to two, so as to fully guide the mold closing of the movable mold 2 and the fixed mold 1. Four guide grooves 11 are also opened on the side wall of the fixed mold 1 close to the movable mold 2. The guide grooves 11 are arranged one by one with the guide rods 21, so that the corresponding guide rods 21 can be inserted, so that the guide rods 21 are inserted in the corresponding guide grooves 11 to achieve the guiding function.

[0038] The implementation principle of the plastic bottle processing mold in Example 1 of the present application is as follows: the gas groove 41 and the material groove 42 are opened, and the gas between the two protrusions 4 can be retained in the gas groove 41 after the fixed mold 1 and the movable mold 2 are molded, thereby effectively reducing the amount of gas at the outer edge of the protrusion 4 after the mold is molded, and reducing the amount of bubbles at the handle after molding. When the fixed mold 1 and the movable mold 2 are molded, the mold blank between the plastic bottle handle and the main body can be clamped into the material groove 42 by the protrusion 4, so that the bubbles in the material groove 42 can be removed together after the mold blank waste in the material groove 42 is cut off, thereby reducing the amount of bubbles at the handle of the plastic bottle after molding, improving the strength of the handle of the plastic bottle after molding, and ensuring the quality of the plastic bottle after molding.

[0039] Example 1 of the present application also discloses a method for producing a plastic bottle using a plastic bottle processing mold, comprising the following steps: S1, extrusion: adding plastic raw materials into the extruder to melt, and extruding the plastic preform; S2, mold closing: add the plastic preform into the mold cavity 3 of the processing mold, then drive the movable mold 2 to move, perform rapid mold closing, and after rapid mold closing, perform high-pressure mold locking; Optionally, a slow mold closing step is further provided between the rapid mold closing and the high-pressure mold locking, and the moving speed of the movable mold 2 during the slow mold closing is less than the moving speed of the movable mold 2 during the rapid mold closing, and to achieve the best effect, the moving speed of the movable mold 2 during the slow mold closing is 5% of the moving speed of the movable mold 2 during the rapid mold closing, and the stroke of the movable mold 2 during the slow mold closing is 8.33% of the stroke of the movable mold 2 during the rapid mold closing, and the stroke of the movable mold 2 during the high-pressure mold locking is 2.77% of the stroke of the movable mold 2 during the rapid mold closing, so as to fully reduce the air in the movable mold 2 and the cavity 3 of the fixed mold 1; S3, blowing: after the mold is closed, the compressed air is introduced into the mold cavity 3 of the processing mold to blow the plastic preform in the mold cavity 3; S4, pressure holding: After blow molding, the pressure in the processing mold cavity 3 is maintained stable by the pressure holding device to ensure the quality of the plastic bottle; S5, exhaust: exhaust the gas in the processing mold cavity 3; S6, demoulding: driving the movable mold 2 away from the fixed mold 1 to demould, and transporting the molded plastic bottle to the area of ​​the next step; S7, deburring: cutting off the excess part of the plastic bottle produced after blow molding, removing the burrs, and cutting off the waste of the preform in the material groove 42 of the original raised part 4; S8, leak detection: move the plastic bottles to the leak detector to detect whether the plastic bottles are leaking, and move qualified plastic bottles to the area of ​​the next step, and move unqualified plastic bottles to the waste area; S9, packaging and warehousing: Move the qualified plastic bottles after leak detection to the packaging area for packaging and warehousing.

[0040] Embodiment 2: The difference between the second embodiment of the present application and the first embodiment is that: Figure 3 and Figure 4 Each guide rod 21 is provided with four sliding blocks 211 at one end away from the movable mold 2. The four sliding blocks 211 are arranged at equal angles along the circumference of the axis of the corresponding guide rod 21, and each sliding block 211 is integrally formed with the corresponding guide rod 21.

[0041] Reference Figure 3 , Figure 4 and Figure 5, each guide rod 21 is provided with an additional frame 5 and a fixing assembly 6, each fixing assembly 6 includes a rotating cylinder 61 and a driving rod 62, the rotating cylinder 61 is sleeved on the corresponding guide rod 21, and one end of the rotating cylinder 61 away from the fixed mold 1 extends into the inside of the guide rod 21, and is rotatably connected to the guide rod 21 through a bearing. In the embodiment of the present application, the number of driving rods 62 on each rotating cylinder 61 is set to two, and they are located on opposite sides of the rotating cylinder 61, and one end of each driving rod 62 is fixedly connected to the corresponding rotating cylinder 61.

[0042] Reference Figure 3 and Figure 5 The other end of the rotating cylinder 61 is sleeved on the corresponding additional frame 5 and is threadedly connected with the additional frame 5. The outer wall of the additional frame 5 is provided with an external thread for threading with the rotating cylinder 61. The additional frame 5 is sleeved on the guide rod 21 and is slidably connected with the guide rod 21. The end of the guide rod 21 close to the fixed mold 1 passes through the additional frame 5.

[0043] Reference Figure 4 and Figure 5 Each sliding block 211 on each guide rod 21 is embedded in the inner wall of the corresponding additional frame 5 and is slidably connected to the inner wall of the additional frame 5 to limit the degree of freedom of the additional frame 5, so that the additional frame 5 is difficult to rotate relative to the guide rod 21, thereby ensuring the driving effect of the rotating cylinder 61 on the additional frame 5. A locking groove 51 is also provided on the outer wall of each additional frame 5. In the embodiment of the present application, the locking groove 51 is annular to adapt to the shape of the additional frame 5.

[0044] Reference Figure 3 and Figure 5 In the initial state, that is, when the guide rod 21 on the movable mold 2 is not inserted into the guide groove 11, the additional frame 5 is located at the end of its own sliding path away from the fixed mold 1. When the rotating cylinder 61 rotates, since the additional frame 5 is restricted by the sliding block 211, the rotating cylinder 61 will drive the additional frame 5 threadedly connected to itself to slide relative to the guide rod 21 in the direction close to the movable mold 2.

[0045] Reference Figure 3 and Figure 4 A locking mechanism 7 is provided in the fixed mold 1. In the embodiment of the present application, the number of the locking mechanisms 7 is set to four, and the locking mechanisms 7 correspond to the guide rods 21 one by one. Each locking mechanism 7 includes a locking frame 71 and a driving assembly 72. In the embodiment of the present application, the number of the locking frames 71 is set to two, and the two locking frames 71 are respectively located on opposite sides of the corresponding guide rods 21.

[0046] Reference Figure 3 and Figure 4Each driving assembly 72 includes an abutting frame 721 and a driving frame 722. The abutting frame 721 includes an abutting portion 7211 and a sliding portion 7222. The sliding portion 7222 is located at a side of the abutting portion 7211 away from the guide rod 21. The sliding portion 7222 and the abutting frame 721 are integrally formed. The sliding portion 7222 is slidably connected to the inner wall of the fixed mold 1, and the sliding direction of the sliding portion 7222 is the moving direction of the movable mold 2. The abutting portion 7211 is located on the displacement path of the guide rod 21, so as to abut against the guide rod 21, so that the guide rod 21 pushes the abutting portion 7211 to move.

[0047] Reference Figure 3 and Figure 4 A return spring 73 is sleeved on each sliding portion 7222, one end of the return spring 73 abuts against the abutting portion 7211, and the other end of the return spring 73 abuts against the inner wall of the fixed mold 1, so that the return spring 73 drives the abutting frame 721 to slide and reset through its own elastic force.

[0048] Reference Figure 4 In the embodiment of the present application, the number of driving frames 722 in each driving assembly 72 is set to two, and the driving frames 722 are arranged one by one with the locking frames 71. One end of each driving frame 722 is rotatably connected to one end of the corresponding sliding portion 7222 away from the abutting portion 7211 through a pin shaft, and the rotation axis of the driving frame 722 and the sliding portion 7222 is perpendicular to the sliding direction of the sliding portion 7222. The other end of each driving frame 722 is rotatably connected to the corresponding locking frame 71 through a pin shaft, and the rotation axis between the driving frame 722 and the locking frame 71 is parallel to the rotation axis of the driving frame 722 and the sliding portion 7222.

[0049] Reference Figure 4 The driving frame 722 is arranged at an end away from the abutting frame 721 and tilted toward the end close to the guide rod 21, so that when the abutting frame 721 is pushed by the guide rod 21, the driving frame 722 drives the corresponding abutting frame 721 to slide downward. The two locking frames 71 are provided with a locking portion 711 on the ends close to each other, and the locking portion 711 is an incomplete circular ring to adapt to the shape of the locking groove 51.

[0050] Reference Figure 3 and Figure 4In the initial state, that is, when the guide rod 21 is not inserted into the guide groove 11, the abutment frame 721 is located at one end of its own sliding path close to the guide rod 21. When the abutment frame 721 is gradually inserted into the corresponding guide groove 11 driven by the movable mold 2, the end of the guide rod 21 gradually abuts against the abutment frame 721 and pushes the abutment frame 721 to slide. In this process, the reset spring 73 is gradually compressed to store elastic potential energy. In this process, the abutment frame 721 drives the driving frame 722 to move, so that the driving frame 722 drives the locking frame 71 to slide in the direction close to the abutment frame 721.

[0051] Reference Figure 3 and Figure 4 In the embodiment of the present application, one end of the sliding portion 7222 away from the abutting portion 7211 is made of metal iron. Four electromagnets 8 are also provided in the fixed mold 1. The electromagnets 8 are arranged one by one corresponding to the abutting frames 721. Each electromagnet 8 is fixedly installed in the fixed mold 1, and each electromagnet 8 is located on the displacement path of the corresponding abutting frame 721. A control circuit for controlling whether the electromagnet 8 and the power supply are energized is also provided in the fixed mold 1, so as to energize the electromagnet 8 so that the electromagnet 8 has magnetism and adsorbs the sliding portion 7222, thereby locking the abutting frame 721, and then locking the locking frame 71.

[0052] Reference Figure 3 , Figure 4 and Figure 6 On the inner side wall of each guide groove 11, two sections of clearance grooves 12 and two sections of spiral grooves 13 are provided, and the clearance grooves 12 and the spiral grooves 13 are arranged one-to-one, and the clearance grooves 12 and the driving rods 62 are arranged one-to-one. The extending direction of the clearance grooves 12 is the opening direction of the guide grooves 11, and one end of the clearance grooves 12 extends out of the guide grooves 11, so that the driving rods 62 on the corresponding rotating cylinders 61 can smoothly enter the clearance grooves 12.

[0053] Reference Figure 4 and Figure 6 The other end of the displacement groove 12 is connected to one end of the spiral groove 13. The spiral groove 13 is spirally arranged so that when the driving rod 62 enters the spiral groove 13, it can abut against the inner wall of the spiral groove 13. Therefore, through the abutment, the rotating cylinder 61 can rotate under the drive of the driving rod 62, thereby realizing the driving of the additional frame 5.

[0054] Reference Figure 3 , Figure 4 and Figure 6In the initial state, that is, when the guide rod 21 is not inserted into the guide groove 11, the driving rod 62 on the rotating cylinder 61 is located outside the clearance groove 12. At this time, the additional frame 5 is located at the end of its own sliding path away from the movable mold 2. At this time, the thread on the additional frame 5 is not completely screwed into the rotating cylinder 61. When the guide rod 21 is gradually inserted into the guide groove 11, the driving rod 62 gradually moves into the clearance groove 12. At this time, the rotating cylinder 61 does not rotate.

[0055] Reference Figure 4 and Figure 6 When the locking groove 51 on the additional frame 5 moves with the guide rod 21 to correspond to the locking frame 71, that is, when the locking groove 51 is located on the displacement path of the corresponding locking frame 71, the driving rod 62 begins to enter the corresponding spiral groove 13 and abuts against the inner wall of the corresponding spiral groove 13, thereby driving the rotating cylinder 61 to rotate. At this time, the thread on the additional frame 5 gradually screws into the rotating cylinder 61, so that the additional frame 5 slides relative to the guide rod 21, so that the position of the additional frame 5 relative to the locking frame 71 remains unchanged, so that the locking frame 71 can be smoothly inserted into the locking groove 51, and the additional frame 5 is locked.

[0056] Reference Figure 3 and Figure 4 At this time, the thread on the additional frame 5 is screwed into the rotating cylinder 61, and the friction between the rotating cylinder 61 and the additional frame 5 keeps the rotating cylinder 61 and the additional frame 5 in the current state, so that the driving rod 62 on the rotating cylinder 61 can only drive the rotating cylinder 61 to rotate when it is subjected to a large thrust (that is, in this application, the guide rod 21 moves so that the driving rod 62 abuts against the inner wall of the spiral groove 13), thereby reducing the probability of the rotating cylinder 61 accidentally rotating slightly, and further keeping the additional frame 5 in the current position. After the locking is completed, the electromagnet 8 is energized to lock the abutment frame 721.

[0057] Reference Figure 3 , Figure 4 and Figure 6 When demoulding is required to separate the fixed mold 1 from the movable mold 2, the circuit between the electromagnet 8 and the power supply is disconnected, so that the magnetism of the electromagnet 8 disappears, thereby canceling the adsorption effect on the abutment frame 721 and unlocking the abutment frame 721. Then the fixed mold 1 and the movable mold 2 begin to separate, and at this time the driving rod 62 abuts against the inner wall of the spiral groove 13, so that the driving rod 62 is subjected to a large thrust, so that the rotating cylinder 61 can rotate relative to the guide rod 21, and the rotation direction at this time is opposite to the direction in which the guide rod 21 is inserted into the guide groove 11, so that the thread on the additional frame 5 is gradually screwed out of the rotating cylinder 61, so that the additional frame 5 and the guide rod 21 slide relative to each other to adapt to the displacement of the guide rod 21.

[0058] Reference Figure 4 and Figure 6During this process, the guide rod 21 gradually moves away from the abutment frame 721, so that the abutment frame 721 gradually returns to its initial position under the elastic force of the return spring 73, and then gradually causes the locking frame 71 to be separated from the locking groove 51, thereby unlocking the additional frame 5. When the locking frame 71 is completely separated from the locking groove 51, the driving rod 62 is separated from the spiral groove 13 and enters the clearance groove 12, so that the guide rod 21, the rotating cylinder 61 and the additional frame 5 can pass smoothly and realize demoulding.

[0059] The implementation principle of a plastic bottle processing mold in Example 2 of the present application is as follows: during the process of closing the fixed mold 1 and the movable mold 2, the guide rod 21 is gradually inserted into the guide groove 11. When the locking groove 51 on the additional frame 5 is located on the displacement path of the corresponding locking frame 71, the driving rod 62 begins to enter the corresponding spiral groove 13 and abuts against the inner wall of the corresponding spiral groove 13, thereby driving the rotating cylinder 61 to rotate. At this time, the thread on the additional frame 5 is gradually screwed into the rotating cylinder 61, so that the additional frame 5 slips relative to the guide rod 21, so that the position of the additional frame 5 relative to the locking frame 71 remains unchanged, so that the locking frame 71 can be smoothly inserted into the locking groove 51 to lock the additional frame 5.

[0060] At this time, the thread on the additional frame 5 is screwed into the rotating cylinder 61, and the friction between the rotating cylinder 61 and the additional frame 5 keeps the current state between the rotating cylinder 61 and the additional frame 5, thereby reducing the probability of the rotating cylinder 61 accidentally rotating slightly, and further keeps the additional frame 5 in the current position. After the locking is completed, the circuit between the electromagnet 8 and the power supply is connected to lock the abutment frame 721.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic bottle processing mold, comprising a fixed mold (1) and a movable mold (2), wherein both the fixed mold (1) and the movable mold (2) are provided with a mold cavity (3), characterized in that: A protrusion (4) is provided in each of the mold cavities (3), and the two protrusions (4) are butted against each other at one end away from the corresponding mold cavities (3). An air-containing groove (41) is provided on one end of the two protrusions (4) close to each other, and a material-containing groove (42) is provided on the inner wall of each of the air-containing grooves (41) away from the other protrusion (4).

2. A plastic bottle processing mold according to claim 1, characterized in that: A guide rod (21) is provided on a side wall of the movable mold (2) close to the fixed mold (1), and the guide rod (21) is inserted into the fixed mold (1). A guide groove (11) for inserting the guide rod (21) is also provided on a side wall of the fixed mold (1) close to the movable mold (2).

3. A plastic bottle processing mold according to claim 2, characterized in that: An additional frame (5) is also provided on one end of the guide rod (21) close to the fixed mold (1), and a locking mechanism (7) is also provided in the fixed mold (1). The locking mechanism (7) comprises a locking frame (71) and a driving component (72). The locking frame (71) is slidably connected to the inner wall of the fixed mold (1), and a locking groove (51) is provided on the additional frame (5). The guide rod (21) drives the locking frame (71) to slide through the driving component (72) and is inserted into the locking groove (51).

4. A plastic bottle processing mold according to claim 3, characterized in that: The driving assembly (72) comprises an abutting frame (721) and a driving frame (722), wherein the abutting frame (721) is slidably connected to the fixed mold (1), the abutting frame (721) is located on the displacement path of the guide rod (21), one end of the driving frame (722) is rotationally connected to the abutting frame (721), and the other end of the driving frame (722) is rotationally connected to the locking frame (71), and the driving frame (722) is away from one end of the abutting frame (721) and is inclined toward a side close to the guide rod (21).

5. A plastic bottle processing mold according to claim 4, characterized in that: An electromagnet (8) is also provided in the fixed mold (1), and the electromagnet (8) is located on the sliding path of the abutment frame (721), and the electromagnet (8) is used to adsorb the abutment frame (721).

6. A plastic bottle processing mold according to claim 4, characterized in that: A return spring (73) is also provided on the abutment frame (721). The return spring (73) is located on a side of the abutment frame (721) away from the guide rod (21). One end of the return spring (73) abuts against the abutment frame (721), and the other end of the return spring (73) abuts against the inner wall of the fixed mold (1).

7. A plastic bottle processing mold according to claim 3, characterized in that: The additional frame (5) is slidably connected to the guide rod (21), and a retaining assembly (6) is also provided on the guide rod (21). The fixed mold (1) drives the additional frame (5) to slide relative to the guide rod (21) through the retaining assembly (6).

8. A plastic bottle processing mold according to claim 7, characterized in that: The retaining assembly (6) comprises a rotating cylinder (61) and a driving rod (62); one end of the rotating cylinder (61) is sleeved on one end of the guide rod (21) close to the fixed mold (1) and is rotatably connected to the guide rod (21); the other end of the rotating cylinder (61) is sleeved on the additional frame (5) and is threadedly connected to the additional frame (5); the driving rod (62) is connected to the outer wall of the rotating cylinder (61); a spiral groove (13) is provided on the fixed mold (1), and the driving rod (62) is located in the spiral groove (13).

9. The method for producing a plastic bottle by using a plastic bottle processing mold according to claim 1, characterized in that: The steps include: Extrusion: Add the plastic raw materials into the extruder to melt and extrude the plastic preform; Mold closing: Add the plastic preform into the mold cavity (3) of the processing mold, then drive the movable mold (2) to move, perform rapid mold closing, and after rapid mold closing, perform high-pressure mold locking; Blowing: After the mold is closed, the compressed air is introduced into the mold cavity (3) of the processing mold to blow the plastic preform in the mold cavity (3); Pressure holding: The pressure in the processing mold cavity (3) is maintained stable by means of a pressure holding device; Exhaust: Exhaust the gas in the processing mold cavity (3); Demolding: driving the movable mold (2) away from the fixed mold (1) to perform demoulding; Deburring: Cut off the excess parts of the plastic bottle produced after blow molding to remove the burrs; Leak detection: Move the plastic bottle to the leak detector to detect whether the plastic bottle leaks; Packaging and warehousing: Move the qualified plastic bottles after leak detection to the packaging area for packaging and warehousing.

10. A method for producing a plastic bottle using the mold according to claim 9, characterized in that: A slow mold closing step is also provided between the rapid mold closing and the high-pressure mold locking in the mold closing step, and the moving speed of the movable mold (2) during the slow mold closing is lower than the moving speed of the movable mold (2) during the rapid mold closing.

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