Electric wall thickness control mechanism for extrusion blow molding machine

Abstract

The utility model discloses an electric wall thickness control mechanism for an extrusion blow molding machine, which comprises a speed reducer bottom plate, a guide rod fixing plate is fixedly arranged on the lower surface of the speed reducer bottom plate, a plurality of supporting columns are fixedly arranged on the lower surface of the guide rod fixing plate, and a planetary nut fixing plate is jointly arranged on the peripheries of the plurality of supporting columns in a sliding and sleeving manner; guide columns are fixedly connected into the four corners of the planet nut fixing plate, and an electric control mechanism is fixedly arranged on the upper surface of the speed reducer bottom plate. One ends of the multiple supporting columns are jointly connected with a main body shell, a second barrel is fixedly connected to the lower surface of the main body shell, a first barrel is fixedly connected to the lower surface of the second barrel, a die head is arranged in the connecting position of the first barrel and the second barrel in an embedded mode, and a sliding sleeve cover plate is fixedly arranged on the surface of the lower end of the first barrel. According to the utility model, the wall thickness of the extruded parison can be accurately controlled, and the non-uniform wall thickness of the parison is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding machine die heads, in particular to an electric wall thickness control mechanism for an extrusion blow molding machine. Background Art

[0002] Existing plastic products are usually made by extrusion blow molding machines. An extrusion die is provided on the extrusion blow molding machine. When the extrusion die is in use, the material is first passed into the feed port through the feed pipe to allow the material to flow into the flow channel structure, and then the material is continuously passed in so that the material is squeezed in the flow channel structure and moves toward the extrusion channel, thereby extruding the product through the extrusion channel.

[0003] However, in order to adapt to different wall thicknesses of existing extruded products, the extrusion die head usually controls the distance between the diverter shuttle and the die device through an oil cylinder or an air cylinder, thereby controlling and adjusting the wall thickness of the extruded product. However, the use of an oil cylinder or an air cylinder control cannot accurately control the distance between the diverter shuttle and the die device, and there will be a large wall thickness deviation. In addition, the existing wall thickness adjustment is usually also performed by controlling the diverter shuttle up and down through an oil cylinder or an air cylinder, and the die device does not move. However, the up and down adjustment of the diverter shuttle will drive the material to move with it, which may easily lead to inconsistent wall thickness of the parison. In addition, when the existing extrusion die head needs to add auxiliary materials to make a product with a transparent observation line, the auxiliary materials are usually directly added to the material in the extrusion channel, so that they merge with the material in the extrusion channel and then form a transparent observation line. However, the added auxiliary materials are easily mixed with the materials in the extrusion channel when added, resulting in a decrease in the quality of the extruded parison. Therefore, a new electric wall thickness control mechanism for an extrusion blow molding machine is needed. Utility Model Content

[0004] The utility model aims to provide an electric wall thickness control mechanism for an extrusion blow molding machine, which is used to solve the problem that when the wall thickness of an extrusion die head controls the wall thickness of an extruded parison through oil cylinder and air cylinder extrusion in the prior art, the wall thickness cannot be accurately controlled and deviation is easily generated.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application adopts the following technical scheme: an electric wall thickness control mechanism for an extrusion blow molding machine, comprising a reducer base plate, a circular through hole is opened on the surface of the reducer base plate, a guide rod fixing plate is fixedly arranged on the lower surface of the reducer base plate, a plurality of support columns are fixedly arranged on the lower surface of the guide rod fixing plate, a planetary nut fixing plate is slidably sleeved on the outer periphery of the plurality of support columns, guide columns are fixedly connected to the inside of the four corners of the planetary nut fixing plate, an electric control mechanism is fixedly arranged on the upper surface of the reducer base plate, and the working end of the electric control mechanism is cooperatively connected with the planetary nut fixing plate; a main body shell is commonly connected to one end of the plurality of support columns, a joint flange is fixedly connected to one side of the main body shell, a second cylinder is fixedly connected to the lower surface of the main body shell, a first cylinder is fixedly connected to the lower surface of the second cylinder, a die head is embedded in the connection between the first cylinder and the second cylinder, a sliding sleeve cover plate is fixedly arranged on the lower end surface of the first cylinder, a convex ring is arranged on the inner wall surface of the sliding sleeve cover plate, and a convex ring is passed through the connection between the sliding sleeve cover plate and the first cylinder A permeable ring and a sliding sleeve are provided in a mosaic manner. A die device is connected to one end of four guide columns below the sliding sleeve cover. The die device is sleeved on the outer periphery of the die head and cooperates with the die head. An auxiliary material feeding device is fixedly provided on one side of the first cylinder. The auxiliary material feeding device is connected with the permeable ring. An extrusion flow channel is provided between the second cylinder, the first cylinder, the permeable ring, the sliding sleeve, the die device and the die head. A first heating plate is sleeved on the outer peripheral surfaces of the first cylinder and the second cylinder. The electric control mechanism includes: a planetary reducer, a planetary reducer The machine is fixedly arranged on the upper surface of the reducer base plate, and the working end of the planetary reducer passes through the circular through hole and extends into the interior of the guide rod fixing plate. A transmission plate is fixedly connected to the working end of the planetary reducer, and a spacing is left between one side surface of the transmission plate and the inner bottom surface of the guide rod fixing plate. A lead screw is coaxially fixedly connected to the interior of the transmission plate, the lead screw extends into the interior of the guide rod fixing plate and is rotatably connected thereto, one end of the lead screw extends out of one side surface of the guide rod fixing plate and is threadedly connected with a planetary nut, and the planetary nut and the planetary nut fixing plate are fixedly connected with the same axis.

[0006] Furthermore, in the embodiment of the utility model, bushings are movably sleeved on the outer circumferences of the plurality of support columns, and the bushings are fixedly arranged inside the planetary nut fixing plate.

[0007] Furthermore, in an embodiment of the utility model, the die head includes: a diverter shuttle, the top end of the diverter shuttle is set to a cone, an annular clamping ring is fixedly arranged on the outer peripheral surface of the diverter shuttle near one end of the cone, a spacing is left between the inner wall surface of the clamping ring and the outer surface of the diverter shuttle, and the clamping ring is fixedly connected to the diverter shuttle through a rib plate, an annular groove is arranged on the surface of the clamping ring, a first air guide hole is arranged inside the center of the diverter shuttle, an air vent connected to the first air guide hole is arranged inside the diverter shuttle, a mold core is coaxially connected with a thread at the bottom end of the diverter shuttle, a second air guide hole is arranged inside the mold core coaxially with the first air guide hole, and the diverter shuttle is arranged inside the connection between the first cylinder and the second cylinder through a clamping ring.

[0008] Furthermore, in an embodiment of the utility model, the permeable ring is located above the sliding sleeve, the lower surface of the permeable ring and the upper surface of the sliding sleeve are fitted with each other, and the inner wall surface of the permeable ring is flush with the inner wall surface of the sliding sleeve; an annular flow groove is provided on the upper surface of the permeable ring, and a symmetrical first diamond block and a second diamond block are provided on the inner wall surface of the permeable ring, one side surface of the first diamond block and the second diamond block are fitted with the outer surface of the diversion shuttle, and a discharge pipe connected to the first diamond block and the annular flow groove is provided inside the permeable ring.

[0009] Furthermore, in an embodiment of the utility model, the die device includes: a sliding sleeve lining plate, the sliding sleeve lining plate is commonly connected to one end of four guide columns, a circular through hole is opened on the surface of the sliding sleeve lining plate and the diameter is larger than the outer diameter of the sliding sleeve, a sliding sleeve lining ring is fixedly connected to the circular through hole of the sliding sleeve lining plate, the outer wall surface of the sliding sleeve lining ring is in contact with the inner wall surface of the sliding sleeve lining plate, the inner wall surface of the sliding sleeve lining ring is in contact with the outer wall surface of the sliding sleeve, a die pressure ring is fixedly arranged on the lower surface of the sliding sleeve lining plate, a die sleeve is embedded in the connection between the die pressure ring and the sliding sleeve, the upper surface of the die sleeve is in contact with the surface of the sliding sleeve lining ring, and the inner wall surface of the die sleeve is flush with the inner wall surface of the sliding sleeve lining ring, and a second heating plate is sleeved on the outer peripheral surface of the sliding sleeve lining plate.

[0010] Furthermore, in an embodiment of the utility model, the auxiliary material feeding device includes: a liquid level line feed pipe, one end of the liquid level line feed pipe is fixedly connected to the outer periphery of the first cylinder body, a feed conversion flange block is fixedly connected to the other end of the liquid level line feed pipe, a barrel is fixedly connected to one end surface of the feed conversion flange block, a reducer seat is fixedly connected to the top of the barrel, an inclined feed port is arranged on the outer periphery of one end of the barrel close to the reducer seat, a third heating plate is sleeved on the outer peripheral surface of the barrel, pipes are arranged inside the barrel and inside the liquid level line feed pipe, the pipes are connected to the circular groove arranged inside the first cylinder body to form an auxiliary material flow channel, and one end of the auxiliary material flow channel is connected to the annular flow groove.

[0011] The beneficial effects of the utility model are as follows: the utility model can realize electric control of the die device by setting an electric control mechanism, so as to more accurately control the wall thickness of the parison after extrusion, and has higher control accuracy than the oil cylinder, and controlling the die device to move and adjust can reduce the impact on the material in the extrusion flow channel compared to controlling the die head to move and adjust, because the material is usually attached to the outer surface of the die head, and when the die head moves, it will move with the material, which will cause the material to flow out before it is extruded by the die head and the die device, which is easy to cause the thickness of the parison to be non-uniform. The movement of the die device will only change the coverage of the die head, thereby having less impact on the thickness of the parison after extrusion. By setting the first diamond block and the second diamond block on the permeable ring, the originally complete material can be cut and separated so that a vertical opening is formed on the surface of the material, and then the auxiliary material can be conveniently allowed to enter the vertical opening of the material through the discharge pipe, so that a transparent liquid level line that is convenient to observe can be produced during the subsequent parison processing. The symmetrically arranged first diamond block and second diamond block can maintain concentricity when the material is cut and separated, thereby preventing the deviation of the extruded parison caused by different material pressures due to one-way cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 The utility model is a schematic diagram of the overall structure of an electric wall thickness control mechanism for an extrusion blow molding machine.

[0014] Figure 2 yes Figure 1 Schematic diagram of the internal structure after sectioning.

[0015] Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0016] Figure 4 yes Figure 2 Schematic diagram of the local enlarged structure at point B in the middle.

[0017] Figure 5 yes Figure 2 Schematic diagram of the structure of the middle die head.

[0018] Figure 6 yes Figure 5 Schematic diagram of the internal structure of the middle shunt shuttle cut away.

[0019] Figure 7 yes Figure 2 Schematic diagram of the structure of the central penetrating ring.

[0020] Figure 8 yes Figure 2 Schematic diagram of the matching structure of the central penetrating ring, the diverter shuttle and the sliding sleeve.

[0021] Fig. 9 yes Figure 7 Schematic diagram of the structure of the heart-penetrating ring from another perspective.

[0022] Fig.10 yes Fig. 9 Schematic diagram of the structure of the heart-penetrating ring from another perspective.

[0023] 10. Reducer base plate 101, guide rod fixing plate 102, planetary nut fixing plate

[0024] 103, joint flange 104, main body shell 105, guide column

[0025] 106, support column 107, bushing 108, sliding cover plate

[0026] 109, first heating plate 1010, first cylinder 1011, second cylinder

[0027] 1012, extrusion flow channel 1013, sliding sleeve

[0028] 20. Mouth die device 201, sliding sleeve liner 202, mouth die pressure ring

[0029] 203, mold sleeve 204, second heating plate 205, sliding sleeve lining ring

[0030] 30. Auxiliary material feeding device 301. Liquid level feed pipe 302. Feed conversion flange block

[0031] 303, barrel 304, reducer base 305, third heating plate

[0032] 306. Auxiliary material flow channel

[0033] 40. Electric control mechanism 401. Planetary reducer 402. Transmission plate

[0034] 403, screw rod 404, planetary nut

[0035] 50, die head 501, diversion shuttle 502, die core

[0036] 503, snap ring 504, annular groove 505, flow hole

[0037] 506. Ventilation hole

[0038] 60, penetrating ring 601, annular flow groove 602, discharge pipe

[0039] 603, first diamond block 604, second diamond block DETAILED DESCRIPTION

[0040] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", and "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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.

[0043] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0044] like Figure 1As shown, this embodiment discloses an electric wall thickness control mechanism for an extrusion blow molding machine, including a reducer base plate 10, a circular through hole is opened on the surface of the reducer base plate 10, a guide rod fixing plate 101 is fixedly arranged on the lower surface of the reducer base plate 10, a plurality of support columns 106 are fixedly arranged on the lower surface of the guide rod fixing plate 101, and a planetary nut fixing plate 102 is slidably sleeved on the outer peripheries of the plurality of support columns 106. The specific connection method is: a bushing 107 is movably sleeved on the outer peripheries of the plurality of support columns 106, and the bushing 107 is fixedly arranged inside the planetary nut fixing plate 102;

[0045] like Figure 1 , 2 4, guide posts 105 are fixedly connected to the four corners of the planetary nut fixing plate 102, and an electric control mechanism 40 is fixedly arranged on the upper surface of the reducer base plate 10, and the working end of the electric control mechanism 40 is matched and connected with the planetary nut fixing plate 102. Specifically, the electric control mechanism 40 includes: a planetary reducer 401, which is fixedly arranged on the upper surface of the reducer base plate 10, and the working end of the planetary reducer 401 passes through the circular through hole and extends into the interior of the guide rod fixing plate 101, The working end of the planetary reducer 401 is fixedly connected to a transmission disk 402, and a gap is left between one side surface of the transmission disk 402 and the inner bottom surface of the guide rod fixing plate 101. A screw rod 403 is coaxially fixedly connected inside the transmission disk 402. The screw rod 403 extends into the interior of the guide rod fixing plate 101 and is rotatably connected thereto. One end of the screw rod 403 extends out of one side surface of the guide rod fixing plate 101 and is threadedly connected to a planetary nut 404. The planetary nut 404 is coaxially fixedly connected to the planetary nut fixing plate 102. By setting up the electric control mechanism 40, the die device 20 can be electrically controlled, so as to more accurately control the wall thickness of the parison after extrusion, and the control accuracy is higher than that of the oil cylinder. In addition, compared with controlling the die head 50 to move and adjust, controlling the die device 20 to move and adjust can reduce the impact on the material in the extrusion flow channel 1012, because the material is usually attached to the outer surface of the die head 50, and when the die head 50 moves, it will move with the material, which will cause the material to flow out before it passes through the extrusion of the die head 50 and the die device 20, which is easy to cause the thickness of the parison to be non-uniform. The movement of the die device 20 will only change the coverage of the die head 50, so it has less impact on the thickness of the parison after extrusion.

[0046] like Figure 2 , 56, a main body shell 104 is commonly connected to one end of a plurality of support columns 106, a joint flange 103 is fixedly connected to one side of the main body shell 104, a second cylinder 1011 is fixedly connected to the lower surface of the main body shell 104, a first cylinder 1010 is fixedly connected to the lower surface of the second cylinder 1011, a die head 50 is embedded in the connection between the first cylinder 1010 and the second cylinder 1011, and the die head 50 includes: a diverter shuttle 501, the top end of the diverter shuttle 501 is set to a cone, and an annular clamping ring 503 is fixedly set on the outer peripheral surface of the diverter shuttle 501 near one end of the cone, and the clamping ring 503 There is a gap between the inner wall surface of the split shuttle 501 and the outer surface of the split shuttle 501, and the clamping ring 503 is fixedly connected to the split shuttle 501 through the rib plate, and an annular groove 504 is provided on the surface of the clamping ring 503, and a first air guide hole is provided in the center of the split shuttle 501, and a vent hole 506 connected to the first air guide hole is provided inside the split shuttle 501, and a mold core 502 is coaxially connected to the bottom end of the split shuttle 501, and a second air guide hole is provided inside the mold core 502 coaxially with the first air guide hole, and the split shuttle 501 is embedded in the connection between the first cylinder 1010 and the second cylinder 1011 through the clamping ring 503. By providing the first air guide hole and the second air guide hole, the inner wall surface of the hollow parison can be prevented from being attached to each other during extrusion, and the hollow parison is expanded by blowing air into the hollow parison, thereby preventing the parisons from being attached to each other.

[0047] like Figure 2 , 3As shown in Figures 7, 8, 9 and 10, a sliding cover plate 108 is fixedly provided on the lower end surface of the first cylinder 1010, a convex ring is provided on the inner wall surface of the sliding cover plate 108, and a penetrating ring 60 and a sliding sleeve 1013 are provided inside the connection between the sliding cover plate 108 and the first cylinder 1010 through the convex ring. The penetrating ring 60 is located above the sliding sleeve 1013, and the lower surface of the penetrating ring 60 and the upper surface of the sliding sleeve 1013 are in contact with each other, and the penetrating ring The inner wall surface of the ring 60 is flush with the inner wall surface of the sliding sleeve 1013; an annular flow groove 601 is arranged on the upper surface of the permeable ring 60, and a symmetrical first diamond block 603 and a second diamond block 604 are arranged on the inner wall surface of the permeable ring 60. One side surface of the first diamond block 603 and the second diamond block 604 fits the outer surface of the diverter shuttle 501, and a discharge pipe 602 connected with the first diamond block 603 and the annular flow groove 601 is arranged inside the permeable ring 60. By arranging the first diamond block 603 and the second diamond block 604 on the permeable ring 60, the originally complete material can be cut and separated so that a vertical opening is formed on the surface of the material, and then the auxiliary material can conveniently enter the vertical opening of the material through the discharge pipe 602, so that a transparent liquid level line that is convenient for observation can be generated during the subsequent parison processing. The symmetrical arrangement of the first diamond block 603 and the second diamond block 604 can maintain concentricity when the material is cut and separated, thereby preventing the deviation of the extruded parison caused by different material pressures due to one-way cutting.

[0048] like Figure 2 , 3 As shown, a die device 20 is commonly connected to one end of four guide pillars 105 located below the sliding sleeve cover plate 108. The die device 20 is sleeved on the outer periphery of the die head 50 and cooperates with the die head 50. The die device 20 includes: a sliding sleeve liner 201, the sliding sleeve liner 201 is commonly connected to one end of the four guide pillars 105, a circular through hole is opened on the surface of the sliding sleeve liner 201, and the diameter is larger than the outer diameter of the sliding sleeve 1013, and a sliding sleeve liner ring 205 is fixedly connected to the circular through hole of the sliding sleeve liner 201, and the outer wall surface of the sliding sleeve liner ring 205 is connected to the sliding sleeve liner The inner wall surface of the sliding sleeve liner 201 is in contact with each other, the inner wall surface of the sliding sleeve liner 205 is in contact with the outer wall surface of the sliding sleeve 1013, a die pressing ring 202 is fixedly arranged on the lower surface of the sliding sleeve liner 201, a die sleeve 203 is embedded in the connection between the die pressing ring 202 and the sliding sleeve 1013, the upper surface of the die sleeve 203 is in contact with the surface of the sliding sleeve liner 205, and the inner wall surface of the die sleeve 203 is flush with the inner wall surface of the sliding sleeve liner 205, the die sleeve 203 is sleeved on the outer periphery of the mold core 502, and a second heating plate 204 is sleeved on the outer peripheral surface of the sliding sleeve liner 201. The die device 20 cooperates with the die head 50 to adjust the thickness of the extruded parison, thereby meeting the processing requirements of different thicknesses.

[0049] like Figure 2 , 3 As shown, an auxiliary material feeding device 30 is fixedly arranged on one side of the first cylinder 1010, and the auxiliary material feeding device 30 is connected to the permeable ring 60. An extrusion flow channel 1012 is connected and arranged between the second cylinder 1011, the first cylinder 1010, the permeable ring 60, the sliding sleeve 1013, the die device 20 and the die head 50. The outer peripheral surfaces of the first cylinder 1010 and the second cylinder 1011 are sleeved with a first heating plate 109. The auxiliary material feeding device 30 includes: a liquid level line feed pipe 301, one end of the liquid level line feed pipe 301 is fixedly connected to the outer periphery of the first cylinder 1010, and a feed conversion flange block 302 is fixedly connected to the other end of the liquid level line feed pipe 301. One end surface of the material conversion flange block 302 is fixedly connected with a barrel 303, a reducer seat 304 is fixedly connected to the top of the barrel 303, a servo motor is arranged on the reducer seat 304, an extrusion screw (not shown in the figure) is fixedly connected to the working end of the servo motor, an inclined feed port is arranged on the outer periphery of one end of the barrel 303 close to the reducer seat 304, a third heating plate 305 is sleeved on the outer peripheral surface of the barrel 303, and pipes are arranged inside the barrel 303 and inside the liquid level line feed pipe 301, the pipes are connected with the circular groove arranged inside the first barrel 1010 and form an auxiliary material flow channel 306, one end of the auxiliary material flow channel 306 is connected with the annular flow groove 601. By arranging the auxiliary material input device 30, after the material is cut and separated, the transparent auxiliary material can be accurately injected into the vertical opening of the material, thereby forming a complete parison with a transparent liquid level observation line.

[0050] The working principle of the utility model is as follows: The diversion and guiding function of the diversion shuttle 501 on the material is a prior art, which will not be described in detail here, and only a brief description is given for easy understanding.

[0051] The material is injected from the joint flange 103, and then flows into the main body shell 104, and then flows into the second cylinder 1011 through the main body shell 104. When the material flows into the second cylinder 1011, the material contacts the top of the diverter shuttle 501, and flows around the diverter shuttle 501 along the cone at the top of the diverter shuttle 501. Then, the material flows through the flow hole 505 and enters the extrusion flow channel 1012. The material is compressed through the extrusion flow channel 1012 to make it denser.

[0052] Then, when the material flows through the permeable ring 60, the first diamond block 603 and the second diamond block 604 provided on the inner wall of the permeable ring 60 will cause the originally complete material to be diverted to form an opening, and while the material flows through the permeable ring 60, auxiliary materials are also put into the feed port of the auxiliary material feeding device 30, and the auxiliary materials flow along the auxiliary material flow channel 306, and flow into the annular flow groove 601 of the permeable ring 60 through the auxiliary material flow channel 306, and then the auxiliary materials flow along the annular flow groove 601 and flow into the discharge pipe 602. Since the discharge pipe 602 is connected to the extrusion flow channel 1012, the auxiliary materials will be added to the flowing material and merge with the originally flowing material, so that the auxiliary materials are filled into the opening of the material. When the material with the auxiliary materials flows to the end of the extrusion flow channel 1012, it is discharged through the mold core 502, thereby forming a hollow parison, and then further processed through the subsequent workstations, so that the subsequent molded product has a transparent liquid level line;

[0053] When the molded product requires different wall thicknesses, the planetary reducer 401 starts to drive the transmission disc 402 to rotate, thereby driving the screw 403 to rotate through the transmission disc 402, and the planetary nut 404 is driven to move downward along the spiral direction of the screw 403 through the rotation of the screw 403, and then the planetary nut 404 drives the planetary nut fixing plate 102 to move downward along the direction of the support column 106, and in the process of the planetary nut fixing plate 102 moving downward, it moves with the guide column 105, thereby pushing the die device 20 to move downward through the guide column 105, and the downward movement of the die device 20 adjusts the distance between the inner wall surface of the die sleeve 203 and the outer wall surface of the die core 502, so as to adapt to molded products with different wall thickness requirements;

[0054] Furthermore, in order to prevent the inner wall surfaces of the preform from sticking to each other during the process of the die device 20 and the die head 50 extruding the hollow preform, the air source connected to the outer periphery of the first cylinder 1010 is started to allow air to flow into the air vent 506 through the air flow duct, and the air enters the first air guide hole through the air vent 506, and enters the second air guide hole of the mold core 502 through the first air guide hole, and the air is blown into the inner wall of the hollow preform through the second air guide hole, so that the inner walls of the hollow preform will not stick to each other.

[0055] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. An electric wall thickness control mechanism for an extrusion blow molding machine, comprising a reducer bottom plate, a circular through hole is opened on the surface of the reducer bottom plate, and is characterized in that: A guide rod fixing plate is fixedly arranged on the lower surface of the reducer bottom plate, a plurality of support columns are fixedly arranged on the lower surface of the guide rod fixing plate, a planetary nut fixing plate is slidably sleeved on the outer periphery of the plurality of support columns, guide columns are fixedly connected to the inside of the four corners of the planetary nut fixing plate, an electric control mechanism is fixedly arranged on the upper surface of the reducer bottom plate, and a working end of the electric control mechanism is cooperatively connected with the planetary nut fixing plate; A main body shell is commonly connected at one end of several supporting columns, a joint flange is fixedly connected at one side of the main body shell, a second cylinder is fixedly connected at the lower surface of the main body shell, a first cylinder is fixedly connected at the lower surface of the second cylinder, a die head is embedded in the connection between the first cylinder and the second cylinder, a sliding sleeve cover plate is fixedly arranged on the lower end surface of the first cylinder, a convex ring is arranged on the inner wall surface of the sliding sleeve cover plate, a penetrating ring and a sliding sleeve are embedded in the connection between the sliding sleeve cover plate and the first cylinder through the convex ring, a die device is commonly connected at one end of four guide columns below the sliding sleeve cover plate, the die device is sleeved on the outer periphery of the die head and cooperates with the die head, an auxiliary material feeding device is fixedly arranged on one side of the first cylinder, the auxiliary material feeding device is connected with the penetrating ring, an extrusion flow channel is connected between the second cylinder, the first cylinder, the penetrating ring, the sliding sleeve, the die device and the die head, and a first heating plate is sleeved on the outer peripheral surfaces of the first cylinder and the second cylinder; The electric control mechanism includes: a planetary reducer, which is fixedly arranged on the upper surface of the reducer base plate, and the working end of the planetary reducer passes through a circular through hole and extends into the interior of the guide rod fixing plate, a transmission plate is fixedly connected to the working end of the planetary reducer, a spacing is left between one side surface of the transmission plate and the inner bottom surface of the guide rod fixing plate, a lead screw is coaxially fixedly connected to the interior of the transmission plate, the lead screw extends into the interior of the guide rod fixing plate and is rotatably connected thereto, one end of the lead screw extends out of one side surface of the guide rod fixing plate and is threadedly connected to a planetary nut, and the planetary nut and the planetary nut fixing plate are coaxially fixedly connected.

2. The electric wall thickness control mechanism for an extrusion blow molding machine according to claim 1, characterized in that: Bushings are movably sleeved on the outer circumferences of a plurality of support columns, and the bushings are fixedly arranged inside a planetary nut fixing plate.

3. The electric wall thickness control mechanism for an extrusion blow molding machine according to claim 1, characterized in that: The die head includes: A shunting shuttle, the top of the shunting shuttle is set to be conical, an annular clamping ring is fixedly set on the outer peripheral surface of the shunting shuttle near one end of the cone, a gap is left between the inner wall surface of the clamping ring and the outer surface of the shunting shuttle, and the clamping ring is fixedly connected to the shunting shuttle through a rib plate, an annular groove is set on the surface of the clamping ring, a first air guide hole is set in the center of the shunting shuttle, an air vent connected to the first air guide hole is set in the inside of the shunting shuttle, a mold core is coaxially connected with the bottom end of the shunting shuttle with a thread, a second air guide hole is set inside the mold core coaxially with the first air guide hole, and the shunting shuttle is embedded in the connection between the first cylinder and the second cylinder through the clamping ring.

4. The electric wall thickness control mechanism for an extrusion blow molding machine according to claim 3, characterized in that: The penetrating ring is located above the sliding sleeve, the lower surface of the penetrating ring and the upper surface of the sliding sleeve are in contact with each other, and the inner wall surface of the penetrating ring is flush with the inner wall surface of the sliding sleeve; An annular flow groove is arranged on the upper surface of the permeable ring, and a symmetrical first diamond block and a second diamond block are arranged on the inner wall surface of the permeable ring. One side surface of the first diamond block and the second diamond block is fitted with the outer surface of the diversion shuttle, and a discharge pipe connected with the first diamond block and the annular flow groove is arranged inside the permeable ring.

5. The electric wall thickness control mechanism for an extrusion blow molding machine according to claim 4, characterized in that: The die device includes: a sliding sleeve lining plate, which is connected to one end of four guide columns, a circular through hole is opened on the surface of the sliding sleeve lining plate and has a diameter larger than the outer diameter of the sliding sleeve, a sliding sleeve lining ring is fixedly connected to the circular through hole of the sliding sleeve lining plate, the outer wall surface of the sliding sleeve lining ring fits with the inner wall surface of the sliding sleeve lining plate, and the inner wall surface of the sliding sleeve lining ring fits with the outer wall surface of the sliding sleeve, a die pressure ring is fixedly arranged on the lower surface of the sliding sleeve lining plate, a die sleeve is embedded in the connection between the die pressure ring and the sliding sleeve, the upper surface of the die sleeve fits with the surface of the sliding sleeve lining ring, and the inner wall surface of the die sleeve is flush with the inner wall surface of the sliding sleeve lining ring, and a second heating plate is sleeved on the outer peripheral surface of the sliding sleeve lining plate.

6. The electric wall thickness control mechanism for an extrusion blow molding machine according to claim 4, characterized in that: The auxiliary material feeding device includes: a liquid level line feed pipe, one end of the liquid level line feed pipe is fixedly connected to the outer periphery of the first cylinder, a feed conversion flange block is fixedly connected to the other end of the liquid level line feed pipe, a barrel is fixedly connected to one end surface of the feed conversion flange block, a reducer seat is fixedly connected to the top of the barrel, an inclined feed port is arranged on the outer periphery of one end of the barrel close to the reducer seat, a third heating plate is sleeved on the outer peripheral surface of the barrel, pipes are arranged inside the barrel and inside the liquid level line feed pipe, the pipes are connected with the circular groove arranged inside the first cylinder to form an auxiliary material flow channel, and one end of the auxiliary material flow channel is connected with the annular flow groove.

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