A PET plastic bottle embryo extrusion molding machine and process

Abstract

The present invention relates to the technical field of molding equipment, and proposes a PET plastic bottle embryo extrusion molding machine and process, including a molding body; a first module is arranged on the molding body, and a second module is movably arranged on the molding body, the first module has a molding core and a supporting ring groove, the supporting ring groove is arranged around the molding core, and the second module has a molding groove; a trimming ring block is movably arranged in the supporting ring groove, and the inner wall of the trimming ring block has a demoulding ring groove, and the trimming ring block extends into or extends out of the supporting ring groove after moving; after the second module moves, the molding core extends into the molding groove, and a molding cavity is formed between the molding core, the trimming ring block and the second module, and the molding cavity is connected to the demoulding ring groove; the trimming ring block is configured to separate the waste edge of the demoulding ring groove and the bottle blank in the molding cavity after being moved by an external force. Through the above technical scheme, the problem that the mold of the extrusion molding machine in the prior art cannot stably and smoothly separate the molded bottle blank from the waste edge on it that is convenient for demoulding during demoulding is solved.

Description

Technical Field

[0001] The invention relates to the technical field of molding equipment, and in particular to a PET plastic bottle embryo extrusion molding machine and process. Background Art

[0002] PET (polyethylene terephthalate) plastic bottle embryos are key intermediate products for manufacturing various plastic bottles and are widely used in the packaging of many industries such as food, beverages, medicines, cosmetics, etc. For example, common mineral water bottles, beverage bottles, edible oil bottles, etc. are mostly made of PET materials.

[0003] With the continuous improvement of science and technology, automated and intelligent production has become the mainstream. The specific production process of bottle preforms is as follows: solid PET granular raw materials are added into the barrel of the extruder through a hopper. There is a heating device on the outside of the barrel, so that the PET raw materials are heated in the barrel and gradually melted into a viscous flow state. Then, driven by the rotation of the screw, the molten PET plastic is driven into the mold and finally cooled and formed into a bottle preform; then demolding, the left and right molds are separated. Since the left mold has an annular groove, the bottle preform is stuck on the left mold and smoothly moves away from the right mold to complete demolding. The bottle preform is finally sucked away by the suction cup driven by the robotic arm to complete unloading.

[0004] However, the above-mentioned extrusion molding machine has the following problems during demolding: the suction cup directly sucks away the bottle blank, and the waste edges in the ring groove cannot be removed stably and smoothly, resulting in the waste edges being accumulated in the ring groove for a long time, affecting the quality of subsequent products; or, the left mold is separated, and the suction cup sucks away the bottle blank and the waste edges, but a subsequent process is still required to remove the waste edges on the bottle blank, resulting in an increase in subsequent workload. Summary of the invention

[0005] The present invention provides a PET plastic bottle preform extrusion molding machine and process, which solves the problem in the related art that the mold of the extrusion molding machine cannot stably and smoothly separate the molded bottle preform from the waste edge thereon for easy demoulding during demoulding.

[0006] The technical solution of the present invention is as follows:

[0007] A PET plastic bottle embryo extrusion molding machine, comprising:

[0008] forming the main body;

[0009] A first module and a second module, wherein the first module is arranged on the molding body, and the second module is movably arranged on the molding body, the first module has a molding core and a supporting ring groove, the supporting ring groove is arranged around the molding core, and the second module has a molding groove;

[0010] A trimming ring block, the trimming ring block is movably arranged in the supporting ring groove, the inner wall of the trimming ring block is provided with a demoulding ring groove, and the trimming ring block extends into or out of the supporting ring groove after movement;

[0011] After the second module moves, the molding core extends into the molding groove, and a molding cavity is formed between the molding core, the trimming ring block and the second module, and the molding cavity is connected to the demoulding ring groove;

[0012] The trimming ring block is configured to separate the waste edge of the demoulding ring groove and the bottle blank of the molding cavity after being moved by an external force.

[0013] As a further technical solution, the trimming ring block has a plurality of demoulding ring grooves, and the plurality of demoulding ring grooves are arranged at intervals along the moving direction of the trimming ring block. After the trimming ring block moves, at least one of the demoulding ring grooves is connected to the molding cavity, and further includes:

[0014] A molding block is moved in the molding groove. After the second module moves, a molding cavity is formed between the molding core, the trimming ring block, the second module and the molding block.

[0015] As a further technical solution, the demoulding ring groove has an opening, and further comprises:

[0016] A plurality of grid sheets are provided at the opening, and the plurality of grid sheets are arranged along the circumference of the demoulding ring groove.

[0017] As a further technical solution, the first module has a high-pressure channel and a discharge channel, the trimming ring block also has two communication channels, both of which are connected to the demoulding ring groove, and after the trimming ring block moves, the high-pressure channel is connected to or disconnected from one of the communication channels, and the discharge channel is connected to or disconnected from the other communication channel, and further includes:

[0018] A heating element is disposed on the first module and is configured to heat the waste edge in the demoulding ring groove to a molten state after being powered on.

[0019] As a further technical solution, the heating element is spiral-shaped and is arranged around the supporting ring groove.

[0020] As a further technical solution, the first module has a feed channel, the feed channel passes through the molding core and is connected to the molding cavity;

[0021] There are a plurality of the molding cores and a plurality of the molding grooves, and the plurality of the molding cores are arranged along a matrix, and the molding cores and the molding grooves correspond one to one.

[0022] As a further technical solution, it also includes:

[0023] A driving plate 1, wherein the driving plate 1 is movably disposed on the first module;

[0024] A connecting rod, both ends of which are respectively arranged on the driving plate 1 and the trimming ring block, the connecting rod passes through the first module, and the driving plate 1 is configured to drive a plurality of the trimming ring blocks to move after moving;

[0025] An air inlet pipe and a discharge pipe, both of which are arranged on the first module, the air inlet pipe is connected to the high-pressure channel, and the discharge pipe is connected to the discharge channel.

[0026] As a further technical solution, the first module further comprises a feed port and a distribution channel, and the feed port is connected to a plurality of the feed channels through the distribution channel.

[0027] As a further technical solution, the bottom of the first module has the feed port, and further comprises:

[0028] A plurality of piston pressurizing columns, each of which is movably disposed in the distribution channel, the piston pressurizing columns corresponding to the feed channel one by one, and the piston pressurizing columns are configured to pressurize the feed channel after moving;

[0029] A second driving plate is movably disposed on the first module, and the second driving plate is configured to drive a plurality of the piston pressure columns to move after moving.

[0030] A PET plastic bottle embryo extrusion process, using the above-mentioned PET plastic bottle embryo extrusion molding machine, comprises the following steps:

[0031] S1. Feeding: providing PET plastic raw materials to the molding body and processing them into molten plastic raw materials;

[0032] S2, mold closing: move the trimming ring block and the forming block to the specified position, and move the second module to close the mold with the first module;

[0033] S3, feeding: the molten plastic raw material is pumped into the molding cavity through the inlet;

[0034] S4, pressure molding: move the piston pressure column to pressurize the molding cavity and gradually cool it to form;

[0035] S5, demoulding and unloading: move the second module away from the first module, move the trimming ring block, and control the robot arm to drive the suction cup to absorb and move the preform.

[0036] The working principle and beneficial effects of the present invention are:

[0037] 1. Effectively solve the problem of waste edge treatment:

[0038] Traditional demoulding uses a suction cup to directly suck away the bottle blank, which cannot directly deal with the waste edges in the ring groove. The waste edges need to be removed in subsequent processes. In this case, the traditional demoulding ring groove and the mold are separated into separate equipment, and the demoulding ring groove is moved after the separation. After the movement, the waste edges in the demoulding ring groove on it can be driven to separate from the bottle blank in the molding cavity, ensuring that the bottle blank remains clean and tidy during demoulding. There is no need to worry about the residual waste edges interfering with the subsequent processes. At the same time, the suction cup stably absorbs the bottle blank to complete the demoulding and avoid the long-term accumulation of waste edges in the ring groove that affects the quality of subsequent products.

[0039] 2. Reduce follow-up workload:

[0040] Compared with the traditional method of removing the waste edges on the preform by an additional process, or relying solely on the suction cup to adsorb and demold, the shear force of the solid part of the demolding ring groove is used to remove the waste edges, which is time-consuming, labor-intensive and increases the workload. In the demolding stage, the molding machine in this case can directly complete the waste edge separation through a small movement of the trimming ring block, saving manpower, material resources and time costs, and improving overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0042] Figure 1 This is a structural schematic diagram of a PET plastic bottle embryo extrusion molding machine in the present invention;

[0043] Figure 2 This is a first-view coordination diagram of the first module and the second module in the present invention;

[0044] Figure 3 This is a schematic diagram of the structure of the first module and the second module in the present invention;

[0045] Figure 4 It is a partial cross-sectional view of the first module in the present invention;

[0046] Figure 5 A cross-sectional view of a molding core body according to a first embodiment of the present invention;

[0047] Figure 6 For the present invention Figure 5 Enlarged view of middle part B;

[0048] Figure 7 A cross-sectional view of a molding core according to a second embodiment of the present invention;

[0049] Figure 8 For the present invention Figure 7Enlarged view of middle C;

[0050] Fig. 9 It is a partial cross-sectional view of the trimming ring block in the present invention;

[0051] Fig.10 For the present invention Fig. 9 Enlarged view of the middle D part;

[0052] Fig.11 It is a schematic diagram of the heating element structure in the present invention;

[0053] Fig.12 This is a schematic diagram of the structure of the first module in the present invention;

[0054] Fig.13 For the present invention Fig.12 Enlarged view of middle E part;

[0055] Fig.14 This is a structural schematic diagram of a driving plate in the present invention;

[0056] Fig.15 It is a schematic diagram of the structure of the air inlet pipe and the discharge pipe in the present invention;

[0057] Fig.16 For the present invention Figure 4 Enlarged view of part A in the middle;

[0058] Fig.17 This is a schematic diagram of the distribution channel structure in the present invention;

[0059] Fig.18 This is a diagram showing the coordination of the first module and the second module in the present invention from a second viewing angle.

[0060] In the figure: 1. molding body, 2. first module, 201. molding core, 202. supporting ring groove, 203. high-pressure channel, 204. discharge channel, 205. feed channel, 206. feed port, 207. distribution channel, 3. second module, 301. molding groove, 4. trimming ring block, 401. demoulding ring groove, 402. opening, 403. connecting channel, 5. molding cavity, 6. molding block, 7. grille sheet, 8. heating element, 9. driving plate one, 10. connecting rod, 11. air inlet pipe, 12. discharge pipe, 13. piston pressure column, 14. driving plate two. DETAILED DESCRIPTION

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0062] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0063] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0065] Reference Figure 1 to Figure 18 , which is the first embodiment of the present invention, provides a PET plastic bottle preform extrusion molding machine, comprising: a molding body 1; a first module 2 is arranged on the molding body 1, and a second module 3 is movably arranged on the molding body 1, the first module 2 has a molding core 201 and a supporting ring groove 202, the supporting ring groove 202 is arranged around the molding core 201, and the second module 3 has a molding groove 301; a trimming ring block 4 is movably arranged in the supporting ring groove 202, and the inner wall of the trimming ring block 4 has a demoulding ring groove 401, and the trimming ring block 4 extends into or out of the supporting ring groove 202 after moving; after the second module 3 moves, the molding core 201 extends into the molding groove 301, and a molding cavity 5 is formed between the molding core 201, the trimming ring block 4 and the second module 3, and the molding cavity 5 is connected to the demoulding ring groove 401; the trimming ring block 4 is configured to separate the waste edge of the demoulding ring groove 401 and the bottle blank of the molding cavity 5 after being moved by an external force.

[0066] This embodiment is the first embodiment. In this embodiment, the working process of the extrusion molding machine disclosed in the present invention is as follows:

[0067] First, solid PET granular raw materials are added into the barrel of the extruder of the molding body 1 through the hopper, and the external heating device of the barrel heats and melts the PET raw materials into a viscous flow state; wherein, the molding body 1 serves as the supporting structure of the entire equipment and is cast from a solid metal material, such as cast iron or steel.

[0068] Secondly, the first module 2 and the second module 3 are molded together, and the linear movement of the second module 3 is used to complete the process, so that the molding core 201 of the first module 2 extends into the molding groove 301. At this time, a molding cavity 5 is formed between the molding core 201, the trimming ring block 4 and the second module 3, and the molding cavity 5 is connected to the demolding ring groove 401 at the same time; wherein, the movement of the second module 3 can be provided with reasonable installation guides and fixed card slots on the molding body 1, which is convenient for the precise installation and smooth movement of the left module and the second module 3. Its shape is roughly rectangular, and there are shock-absorbing pads at the bottom to reduce the vibration of the equipment during operation.

[0069] Afterwards, the molten PET plastic is driven into the molding cavity 5 through the extrusion port of the extruder and the connecting pipeline on one side of the first module 2 at a fixed position by the rotating driving action of the screw, and is molded in the molding cavity 5 and cooled to become a bottle blank.

[0070] Finally, the second module 3 moves away from the first module 2, and the molding core 201 extends out of the molding groove 301. Under the clamping action of the waste edge in the demoulding ring groove 401 on the first module 2, the bottle blank is left on the molding core 201 of the first module 2. After the robotic arm drives the suction cup to resist and adsorb the bottle blank, the trimming ring block 4 is moved by the external force, so that the demoulding ring groove 401 and the molding core 201 move relative to each other, so that the waste edge is separated from the bottle blank, and then the bottle blank is adsorbed away to complete the unloading.

[0071] Specifically, the form in which the trimming ring block 4 is subjected to external force can be achieved by a cylinder arranged on the first module 2, or a suction cup is set in the groove with a certain amount of movement through an elastic member. When it abuts and adsorbs the bottle blank, the suction cup also has an abutment portion abutting on the trimming ring block 4, and then the suction cup is driven to move by the mechanical arm, and then an external force is applied to the trimming ring block 4 through the abutment portion to complete the trimming. The existence of the suction cup movement is precisely to prevent the suction cup from damaging the bottle blank and finally adsorbing the bottle blank.

[0072] For each component, the molding core 201 is preferably arranged at the center position of the first module 2, and the supporting ring groove 202 is arranged around it. The shape of the trimming ring block 4 is matched with the supporting ring groove 202. It is made of cemented carbide and mainly provides limiting support for the movement of the trimming ring block 4. The diameter of the inner wall demoulding ring groove 401 is slightly larger than the diameter of the column-forming molding core 201, which provides conditions for forming the molding cavity 5 and ensures that the waste edge is completely separated; the molding groove 301 of the second module 3 should be adapted to the molding core 201 of the left module. The depth and curvature of the groove are precisely processed according to the design requirements of the bottle blank. Its movement is realized by installing guide rails. The installing guide rails are installed at the bottom of the molding body 1 and driven by a motor. The moving speed and position can be accurately controlled.

[0073] Compared with the traditional trimming ring block 4 integrally formed with the first module 2, the trimming ring block 4 is driven by external force to move relative to the forming core 201 to quickly remove the waste edges and avoid increasing the subsequent workload; and further consideration is how to ensure that the waste edges of the demolding ring groove 401 after molding are quickly removed to facilitate the rapid connection of subsequent molding work. The trimming ring block 4 can be set in a split manner, and then separated in half after it moves, so that the waste edges are automatically detached, and then reset to continue molding.

[0074] Furthermore, the trimming ring block 4 has a plurality of demolding ring grooves 401, and the plurality of demolding ring grooves 401 are arranged at intervals along the moving direction of the trimming ring block 4. After the trimming ring block 4 moves, at least one demolding ring groove 401 is used to connect the molding cavity 5. It also includes: the molding block 6 moves in the molding groove 301, and after the second module 3 moves, a molding cavity 5 is formed between the molding core 201, the trimming ring block 4, the second module 3 and the molding block 6.

[0075] This embodiment is the second embodiment, which adds some structures on the basis of the first embodiment. The following content only describes the differences from the first embodiment.

[0076] In this embodiment, the demoulding ring grooves 401 on the inner wall of the trimming ring block 4 are increased to several numbers and arranged at intervals along the moving direction of the trimming ring block 4, so as to avoid the structural complexity caused by the split setting for the purpose of quickly removing the waste edges, further reduce the production cost, improve the production efficiency, and save the subsequent complicated processing steps.

[0077] By moving the trimming ring block 4, the demoulding ring grooves 401 are used one by one, and further considering that due to the change in the position of the demoulding ring groove 401, the second module 3 is moved and molded with the first module 2 to form the position of the molding cavity 5, which also needs to be changed, that is, the length of the molding core 201 extending into the molding groove 301 changes. In order to adapt to the design of several groups of demoulding ring grooves 401 to ensure the consistency of the molded products, a molding block 6 is provided in the molding groove 301 to move along its depth, and its movement can be precisely driven by components such as cylinders.

[0078] Changes in the specific working process of the extrusion molding machine: Before the second step of mold closing, the molding block 6 needs to be moved to a suitable position for the trimming ring blocks 4 at different positions, so that after the mold is closed, a consistent molding cavity 5 is formed between the molding core 201, the trimming ring block 4, the second module 3 and the molding block 6, and then the feeding, molding and demolding operations are carried out.

[0079] As for the use of several groups of demoulding ring grooves 401, they need to be used one by one from far to close to the supporting ring groove 202. When the first one is used up and the second one is ready to be used, since the waste edge in the first demoulding ring groove 401 is filled in it, it will not affect the molding of the second bottle blank, and the trimming ring block 4 can still move to complete the separation action. Finally, after all the demoulding ring grooves 401 are used up, the structure can be quickly replaced to achieve rapid connection of production.

[0080] The trimming ring block moves to cut the waste edge, which may leave "burrs" on the bottle blank, and with the support of several demoulding ring grooves, multiple "burrs" may be left at various positions on the same bottle body. However, even if there are multiple "burrs" left, it will not affect the use of the bottle blank. The tiny "burrs" can be easily polished off, and the traditional complex and time-consuming polishing process is no longer required. In order to ensure product quality, it can be simply polished by rotating the grinding roller after demoulding.

[0081] Furthermore, the demoulding ring groove 401 has an opening 402 , and further comprises: a plurality of grid sheets 7 are all arranged at the opening 402 , and the plurality of grid sheets 7 are arranged along the circumference of the demoulding ring groove 401 .

[0082] On the basis of the first embodiment or the second embodiment, in order to enhance the effectiveness of the separation action and to make the waste edge more smoothly separated from the preform, a principle similar to pre-made indentations is used to facilitate tearing, so that the annular waste edge in the demoulding ring groove 401 has a "pre-made indentation" after molding, and the annular waste edge is changed into a waste edge with an "annular structure" arranged in a circle one by one, so that the trimming ring block 4 can more easily cut off the "annular structure" by moving.

[0083] Specifically, at the opening 402 of the inner diameter of the demolding ring groove 401, a plurality of grid sheets 7 arranged along the circumference of the demolding ring groove 401 are integrally formed or welded, so that during molding, the plurality of grid sheets 7 occupy the positions where the molten plastic should be located along the ring, and change the molding into a ring form. At the same time, the arrangement of the grid sheets 7 will not affect the connection between the demolding ring groove 401 and the molding cavity 5, and will not affect the molding.

[0084] Furthermore, the first module 2 has a high-pressure channel 203 and a discharge channel 204, and the trimming ring block 4 also has two connecting channels 403, and the two connecting channels 403 are both connected to the demolding ring groove 401. After the trimming ring block 4 moves, the high-pressure channel 203 connects or cancels the connection with one of the connecting channels 403, and the discharge channel 204 connects or cancels the connection with the other connecting channel 403. It also includes: a heating element 8 is arranged on the first module 2, and the heating element 8 is configured to heat the waste edge in the demolding ring groove 401 to a molten state after power is turned on.

[0085] In this embodiment, in order to solve the problem that the waste edges retained in the demoulding ring groove 401 cannot be separated and avoid the subsequent use of a method of quickly replacing the trimming ring block 4 and a split design method, which leads to a more complicated structure, while ensuring the rapid connection of production, a "recycling" method is adopted to reheat the thin and plastic waste edges in the demoulding ring groove 401 back to a molten state for recycling. This process can be achieved only by moving the trimming ring block 4, heating and arranging pipelines. Since the waste edges are thin, after molding, it does not take a long time for the demoulding ring groove 401 to be filled with waste edges to complete the above action, which affects the production rhythm.

[0086] Specifically, a high-pressure channel 203 and a discharge channel 204 are provided in the first module 2, and at the same time, the trimming ring block 4 is provided with two connecting channels 403 connected with all the demoulding ring grooves 401. The high-pressure channel 203 can be configured with a pump body corresponding to it, and a heating element 8 for heating the waste edges to a molten state is configured on the first module 2; when all the demoulding ring grooves 401 on the trimming ring block 4 have been formed once and are full of waste edges that need to be processed, the trimming ring block 4 moves and extends into the supporting ring groove 202, so that the high-pressure channel 203 and the discharge channel 204 are connected with the two connecting channels 403 respectively, and the heating element 8 in the form of a resistance wire or the like is controlled to be energized and heated for 10-60s to make all the waste edges molten, and then the pump body is controlled to pump air and pressurize the high-pressure channel 203, forcing the molten waste edges to flow along the connecting channel 403 and the discharge channel 204 for recovery. During normal forming, the high-pressure channel 203 and the discharge channel 204 are not connected with the connecting channel 403.

[0087] Furthermore, the heating element 8 is spiral-shaped and is disposed around the supporting annular groove 202 .

[0088] In this embodiment, specifically, the waste edge is an annular structure. In order to improve the heating efficiency, shorten the time to become molten, and thus increase the production rhythm, a heating element 8 in the form of a spiral resistance wire is used and arranged around the supporting ring groove 202. When working, it can provide heat to the cutting ring block 4 more comprehensively.

[0089] Furthermore, the first module 2 has a feed channel 205, which passes through the molding core 201 and is connected to the molding cavity 5; wherein, there are multiple molding cores 201 and molding grooves 301, and the multiple molding cores 201 are arranged along a matrix, and the molding cores 201 and the molding grooves 301 correspond one to one.

[0090] In this embodiment, in order to facilitate the injection of molten PET plastic into the molding cavity 5 and avoid feeding on the moving second module 3, which makes it difficult to connect with the extrusion port of the extruder and makes the structure complicated, a feeding channel 205 is opened on the first module 2 in a fixed position and passes through the molding core 201 to facilitate feeding and molding.

[0091] At the same time, a plurality of molding cores 201 and molding grooves 301 are provided, which correspond to each other one by one and are arranged along a matrix, so as to greatly improve the production efficiency.

[0092] Furthermore, it also includes: a driving plate 9 is movably arranged on the first module 2; both ends of the connecting rod 10 are respectively arranged on the driving plate 9 and the trimming ring block 4, the connecting rod 10 passes through the first module 2, and the driving plate 9 is configured to drive a plurality of trimming ring blocks 4 to move after moving; the air inlet pipe 11 and the discharge pipe 12 are both arranged on the first module 2, the air inlet pipe 11 is connected to the high-pressure channel 203, and the discharge pipe 12 is connected to the discharge channel 204.

[0093] In the present embodiment, correspondingly, in order to synchronously drive several trimming ring blocks 4, a driving plate 9 is provided on one side of the first module 2 by means of a cylinder for movement. In order to make full use of the space and avoid the position of the driving plate 9 affecting the feeding, an avoidance area can be opened on the first module 2. The driving plate 9 is located in the avoidance area and on the same side of several trimming ring blocks 4, which is convenient for installation and connection. At the same time, several feeding channels 205 pass through the driving plate, so that the connecting rod 10 passing through the first module 2 can be conveniently connected to the driving plate 9 and the several trimming ring blocks 4, thereby realizing that the driving plate 9 moves and drives the several trimming ring blocks 4 to move.

[0094] At the same time, since several groups of high-pressure channels 203 and discharge channels 204 are correspondingly opened on the first module 2, in order to facilitate subsequent maintenance and synchronous work, an air intake pipe 11 and a discharge pipe 12 are configured, which are respectively connected to the high-pressure channel 203 and the discharge channel 204, and the pump body is correspondingly installed on the air intake pipe 11 to provide the high-pressure airflow required for discharge.

[0095] Furthermore, the first module 2 also has a feed port 206 and a distribution channel 207 , and the feed port 206 is connected to a plurality of feed channels 205 through the distribution channel 207 .

[0096] In this embodiment, since there is only one extruder extrusion port, it needs to be evenly distributed to several feed channels 205, so a feed port 206 and a distribution channel 207 are opened on the first module 2 on the other side of the avoidance area away from the trimming ring block 4, so that the feed port 206 is connected to several feed channels 205 through the distribution channel 207, and then after the screw is rotated and pushed, the molten raw material is evenly distributed to each feed channel 205 along the feed port 206 and the distribution channel 207, and the movement of the drive plate 9 does not affect the process.

[0097] Furthermore, the first module 2 has a feed port 206 at the bottom, and also includes: a plurality of piston pressure columns 13 are movably arranged in the distribution channel 207, the piston pressure columns 13 and the feed channels 205 correspond one to one, and the piston pressure columns 13 are configured to pressurize the feed channels 205 after moving; a drive plate 2 14 is movably arranged on the first module 2, and the drive plate 2 14 is configured to drive the plurality of piston pressure columns 13 to move after moving.

[0098] In this embodiment, in order to improve the quality of bottle blank molding and adapt to a plurality of groups of feeding channels 205, a plurality of piston pressurizing columns 13 need to be configured to move in the distribution channels 207 at the same side of the plurality of groups of feeding channels 205. The two correspond one to one to avoid the omission of raw materials. The moving setting of the driving plate 2 14 is the same as the principle of the driving plate 1 9, and is driven by the cylinder to synchronously drive the plurality of groups of piston pressurizing columns 13 to move and pressurize.

[0099] In order to further avoid the position of the second driving plate 14 and realize feeding at the same time, a feed port 206 is arranged at the bottom.

[0100] Changes in the specific working process of the extrusion molding machine: After feeding, it is necessary to control the movement of several piston pressure columns 13 to pressurize the molding cavity 5, and gradually cool and mold it, and then perform demolding and unloading operations.

[0101] A PET plastic bottle embryo extrusion process, using the above-mentioned PET plastic bottle embryo extrusion molding machine, comprises the following steps:

[0102] S1, feeding: providing PET plastic raw material to the molding body 1 and processing it into molten plastic raw material;

[0103] S2, mold closing: move the trimming ring block 4 and the forming block 6 to the specified position, and move the second module 3 and the first module 2 to close the mold;

[0104] S3, feeding: the molten plastic raw material is pumped into the molding cavity 5 through the inlet;

[0105] S4, pressure molding: moving the piston pressure column 13, pressurizing the molding cavity 5, and gradually cooling the molding;

[0106] S5, demoulding and unloading: move the second module 3 away from the first module 2, move the trimming ring block 4, and control the robot arm to drive the suction cup to absorb and move the preform.

[0107] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A PET plastic bottle preform extrusion molding machine, characterized in that: include: A molded body (1); A first module (2) and a second module (3), wherein the first module (2) is arranged on the molding body (1), and the second module (3) is movably arranged on the molding body (1), the first module (2) has a molding core (201) and a supporting ring groove (202), the supporting ring groove (202) is arranged along the periphery of the molding core (201), and the second module (3) has a molding groove (301); A trimming ring block (4), the trimming ring block (4) being movably arranged in the supporting ring groove (202), the inner wall of the trimming ring block (4) being provided with a demoulding ring groove (401), and the trimming ring block (4) extending into or out of the supporting ring groove (202) after moving; After the second module (3) moves, the molding core (201) extends into the molding groove (301), and a molding cavity (5) is formed between the molding core (201), the trimming ring block (4) and the second module (3), and the molding cavity (5) is connected to the demoulding ring groove (401); The trimming ring block (4) is configured to separate the waste edge of the demoulding ring groove (401) and the preform in the molding cavity (5) after being moved by an external force; The trimming ring block (4) has a plurality of demoulding ring grooves (401), the plurality of demoulding ring grooves (401) being arranged at intervals along the moving direction of the trimming ring block (4), and after the trimming ring block (4) moves, at least one of the demoulding ring grooves (401) is connected to the molding cavity (5), and further comprises: A molding block (6), wherein the molding block (6) moves in the molding groove (301), and after the second module (3) moves, a molding cavity (5) is formed between the molding core (201), the trimming ring block (4), the second module (3) and the molding block (6); The demoulding ring groove (401) has an opening (402) and further comprises: A plurality of grille sheets (7), wherein the plurality of grille sheets (7) are all arranged at the opening (402), and the plurality of grille sheets (7) are arranged along the circumference of the demoulding ring groove (401); The first module (2) has a high-pressure channel (203) and a discharge channel (204), the trimming ring block (4) also has two communication channels (403), both of the two communication channels (403) are connected to the demoulding ring groove (401), after the trimming ring block (4) moves, the high-pressure channel (203) is connected to or disconnected from one of the communication channels (403), and the discharge channel (204) is connected to or disconnected from the other of the communication channels (403), and further comprises: A heating element (8), the heating element (8) being arranged on the first module (2), the heating element (8) being configured to heat the waste edge in the demoulding ring groove (401) to a molten state after being powered on.

2. A PET plastic bottle preform extrusion molding machine according to claim 1, characterized in that: The heating element (8) is spiral-shaped and is arranged along the periphery of the supporting ring groove (202).

3. A PET plastic bottle preform extrusion molding machine according to claim 1, characterized in that: The first module (2) has a feed channel (205), the feed channel (205) passes through the molding core (201) and is in communication with the molding cavity (5); There are a plurality of the molding cores (201) and a plurality of the molding grooves (301), the plurality of the molding cores (201) are arranged along a matrix, and the molding cores (201) and the molding grooves (301) correspond one to one.

4. A PET plastic bottle preform extrusion molding machine according to claim 3, characterized in that: Also includes: A driving plate 1 (9), the driving plate 1 (9) being movably arranged on the first module (2); a connecting rod (10), wherein two ends of the connecting rod (10) are respectively arranged on the driving plate 1 (9) and the trimming ring block (4), the connecting rod (10) passes through the first module (2), and the driving plate 1 (9) is configured to drive a plurality of the trimming ring blocks (4) to move after moving; An air intake pipe (11) and a discharge pipe (12), wherein the air intake pipe (11) and the discharge pipe (12) are both arranged on the first module (2), the air intake pipe (11) is connected to the high-pressure channel (203), and the discharge pipe (12) is connected to the discharge channel (204).

5. A PET plastic bottle preform extrusion molding machine according to claim 4, characterized in that: The first module (2) further comprises a feed inlet (206) and a distribution channel (207); the feed inlet (206) is connected to a plurality of the feed channels (205) via the distribution channel (207).

6. A PET plastic bottle preform extrusion molding machine according to claim 5, characterized in that: The first module (2) has the feed port (206) at the bottom, and further comprises: A plurality of piston pressurizing columns (13), each of the plurality of piston pressurizing columns (13) being movably disposed in the distribution channel (207), the piston pressurizing columns (13) corresponding to the feed channel (205) one by one, and the piston pressurizing columns (13) being configured to pressurize the feed channel (205) after movement; A second driving plate (14), the second driving plate (14) being movably disposed on the first module (2), the second driving plate (14) being configured to drive a plurality of the piston pressure columns (13) to move after movement.

7. A PET plastic bottle embryo extrusion process, using the PET plastic bottle embryo extrusion molding machine according to claim 6, characterized in that: The following steps are involved: S1, feeding: providing PET plastic raw material to the molding body (1) and processing it into a molten plastic raw material; S2, mold closing: moving the trimming ring block (4) and the molding block (6) to a specified position, and moving the second mold block (3) and the first mold block (2) to close the mold; S3, feeding: the molten plastic raw material is pumped into the molding cavity (5) through the inlet; S4, pressure molding: moving the piston pressure column (13) to pressurize the molding cavity (5), and gradually cooling the molding; S5, demoulding and unloading: moving the second module (3) away from the first module (2), moving the trimming ring block (4), and controlling the robotic arm to drive the suction cup to absorb and remove the preform.

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