Lower blowing needle mechanism for full-electric extrusion blow molding machine

Abstract

The lower blowing needle mechanism comprises a bottom plate, guide rails are fixedly arranged on the upper surfaces of the two opposite sides of the bottom plate correspondingly, a plurality of sliding blocks are movably arranged on the two guide rails correspondingly, and the two guide rails are jointly connected with an air cylinder fixing plate and an electric cylinder fixing plate through the sliding blocks; a gap is reserved between the air cylinder fixing plate and the electric cylinder fixing plate, a first jacking mechanism is arranged at the middle section position of the air cylinder fixing plate, and a second jacking mechanism is arranged at the middle section position of the electric cylinder fixing plate; the lower surfaces of the air cylinder fixing plate and the electric cylinder fixing plate are jointly connected with an adjusting mechanism. According to the utility model, the lower blowing needle does not rub with the die when entering the die, so that the die is prevented from being damaged, and the lower blowing needle does not extrude a parison when entering the parison, so that the parison is prevented from being deformed.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding, in particular to a lower blow needle mechanism for a full-electric extrusion blow molding machine. Background Art

[0002] Blow molding mainly refers to the blowing needle using gas pressure to blow up the parison closed in the mold to form a hollow product. At present, the blowing needle of the blow molding machine is usually set above the mold. When the mold is closed, the blowing needle moves downward from the top to insert into the mold, and then blows up the parison in the mold to form a hollow blow-molded product.

[0003] However, blowing air at the parison in the mold by the upper blowing needle can easily lead to a decrease in the service life of the mold, because the upper blowing needle enters the mold from the top each time, and the outer wall of the upper blowing needle will rub against the mold. If there is still some deviation between the mold and the upper blowing needle, the mold will be damaged more seriously and the service life will be shortened. In addition, during the process of inserting the upper blowing needle into the mold, since the upper blowing needle enters from the opening of the mold, it will squeeze the parison in the mold, thereby causing deformation of the mouth of the parison and producing unqualified blow-molded products. The blowing method of setting the lower blowing needle can avoid wear of the mold and deformation of the mouth of the parison. Therefore, a lower blowing needle mechanism for a fully electric extrusion blow molding machine is needed. Utility Model Content

[0004] The utility model aims to provide a lower blowing needle mechanism for a fully electric extrusion blow molding machine, which is used to solve the problems in the prior art that during blow molding, the upper blowing needle enters the mold by insertion, which easily causes the mouth of the parison to be squeezed and deformed by the upper blowing needle, and the upper blowing needle causes friction to the mold when entering the mold, thereby reducing the service life of the mold.

[0005] To achieve the above-mentioned purpose, the embodiment of the present application adopts the following technical scheme: a lower blowing needle mechanism for a fully electric extrusion blow molding machine, including a bottom plate, the bottom plate is arranged in a mouth shape, guide rails are fixedly arranged on the upper surfaces of the opposite sides of the bottom plate, and a plurality of sliding blocks are movably arranged on the two guide rails, and a cylinder fixing plate and an electric cylinder fixing plate are commonly connected on the two guide rails through the sliding blocks, and a spacing is left between the cylinder fixing plate and the electric cylinder fixing plate, a first lifting mechanism is arranged at the middle section of the cylinder fixing plate, and a second lifting mechanism is arranged at the middle section of the electric cylinder fixing plate; the first lifting mechanism includes: a lifting cylinder, the lifting cylinder is fixedly arranged on the lower surface of the cylinder fixing plate, the telescopic end of the lifting cylinder extends out of the upper surface of the cylinder fixing plate, and a cylinder is fixedly connected to the telescopic end of the lifting cylinder A push plate, a supporting rod is arranged on the upper surface end of the cylinder push plate, a cylinder guide rod is fixedly arranged on the lower surface end of the cylinder push plate, and the cylinder guide rod is slidably connected to a guide seat arranged on the surface of one side of the cylinder fixed plate; the second lifting mechanism includes: a lifting electric cylinder, the lifting electric cylinder is fixedly arranged on the lower surface of the electric cylinder fixed plate, the telescopic end of the lifting electric cylinder extends out of the upper surface of the electric cylinder fixed plate, the electric cylinder push plate is fixedly connected to the telescopic end of the lifting electric cylinder, a lower blowing needle is arranged on the upper surface end of the electric cylinder push plate, and two symmetrical electric cylinder guide rods are fixedly arranged on the lower surface end of the electric cylinder push plate, and the two electric cylinder guide rods are slidably connected to the electric cylinder push plate; an adjusting mechanism is commonly connected to the lower surfaces of the cylinder fixed plate and the electric cylinder fixed plate, and the adjustment mechanism can be used to control the movement of the cylinder fixed plate and the electric cylinder fixed plate.

[0006] Furthermore, in an embodiment of the utility model, the adjusting mechanism includes: an adjusting fixed plate, a limit block, and an adjusting sliding plate. The adjusting fixed plate is fixedly mounted on the lower surface of the electric cylinder fixed plate, the adjusting sliding plate is fixedly mounted on the lower surface of the cylinder fixed plate, a screw seat is arranged inside the adjusting sliding plate, the limit block is located between the adjusting fixed plate and the adjusting sliding plate and is fixedly connected to the inner surface of the base plate, a driving reducer is fixedly connected to one side surface of the adjusting fixed plate, a coupling is connected to the working end of the driving reducer, a screw is fixedly connected to one end of the coupling, the screw passes through the interior of the limit block and is movably connected to the screw seat, and one end of the screw is movably connected to the fixed seat on the lower surface of the base plate.

[0007] Furthermore, in an embodiment of the utility model, one end of the screw rod movably connected to the fixing seat is configured as a smooth section, and a gap is left between the intersection of the smooth section and the screw rod and a side surface of the fixing seat.

[0008] Furthermore, in an embodiment of the utility model, an arc-shaped avoidance groove is provided at one end of the limit block facing the screw rod.

[0009] Furthermore, in the embodiment of the utility model, a first limiting column and a second limiting column are respectively fixedly provided on the two side surfaces of the bottom plate facing the adjusting sliding plate and the adjusting fixing plate.

[0010] The beneficial effect of the utility model is as follows: the utility model can make the support rod and the lower blowing needle move up and down through the first lifting mechanism and the second lifting mechanism, so that the support rod and the lower blowing needle can enter the interior of the parison, and then support the parison to prevent the inner wall surface of the parison from being attached together. The movement of the adjustment sliding plate and the adjustment fixed plate can be realized by driving the reducer, and there is no need to set up multiple driving sources, avoiding the need to control multiple driving sources separately during use, which increases the cumbersomeness of control, and in order to avoid that there are driving sources that are not working, it is also necessary to configure additional sensors to monitor whether multiple driving sources are working normally, which increases the cost of use. By setting the first limit column and the limit block, the position of the adjustment sliding plate can be fixed after the adjustment sliding plate is in contact with the first limit column and the limit block, so that the screw rod and the drive reducer can control the movement of the adjustment fixed plate, thereby realizing that only one drive reducer can be used to control the movement of the adjustment sliding plate and the adjustment fixed plate at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 The utility model is a schematic diagram of the overall structure of a lower blowing needle mechanism for a full-electric extrusion blow molding machine.

[0013] Figure 2 yes Figure 1 Another perspective structural diagram of .

[0014] Figure 3 yes Figure 1 Schematic diagram of the structure from another perspective after removing the lifting cylinder and lifting electric cylinder.

[0015] 10. Bottom plate 101, guide rail 102, sliding block

[0016] 103, cylinder fixing plate 104, electric cylinder fixing plate 105, first limiting column

[0017] 106. Second limit column

[0018] 20. First lifting mechanism 201, lifting cylinder 202, cylinder guide rod

[0019] 203. Cylinder push plate

[0020] 30. Second lifting mechanism 301, lifting electric cylinder 302, electric cylinder push plate

[0021] 303, Electric cylinder guide rod

[0022] 40. Adjustment mechanism 401. Driving reducer 402. Adjustment fixing plate

[0023] 403, adjusting sliding plate 404, limit block 405, coupling

[0024] 406, screw rod 407, smooth section 408, screw rod seat

[0025] 409, Avoidance Trough DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figure 1-3 As shown, this embodiment discloses a lower blow needle mechanism for a fully electric extrusion blow molding machine, including a bottom plate 10, the bottom plate 10 is arranged in a square shape, guide rails 101 are fixedly arranged on the upper surfaces of the two opposite sides of the bottom plate 10, and a plurality of sliding blocks 102 are movably arranged on the two guide rails 101, and a cylinder fixing plate 103 and an electric cylinder fixing plate 104 are connected to the two guide rails 101 through the sliding blocks 102, and a spacing is left between the cylinder fixing plate 103 and the electric cylinder fixing plate 104, and a first top plate 103 is arranged in the middle of the cylinder fixing plate 103. Lifting mechanism 20, the first lifting mechanism 20 includes: a lifting cylinder 201, the lifting cylinder 201 is fixedly arranged on the lower surface of the cylinder fixing plate 103, the telescopic end of the lifting cylinder 201 extends out of the upper surface of the cylinder fixing plate 103, a cylinder push plate 203 is fixedly connected to the telescopic end of the lifting cylinder 201, a supporting rod is arranged on the upper surface end of the cylinder push plate 203, and a cylinder guide rod 202 is fixedly arranged on the lower surface end of the cylinder push plate 203, and the cylinder guide rod 202 is slidably connected to a guide seat arranged on the surface of one side of the cylinder fixing plate 103.

[0031] A second lifting mechanism 30 is provided at the middle section of the electric cylinder fixing plate 104. The second lifting mechanism 30 includes: a lifting electric cylinder 301. The lifting electric cylinder 301 is fixedly provided on the lower surface of the electric cylinder fixing plate 104. The telescopic end of the lifting electric cylinder 301 extends out of the upper surface of the electric cylinder fixing plate 104. A cylinder push plate 302 is fixedly connected to the telescopic end of the lifting electric cylinder 301. A lower blow needle is provided on the upper surface end of the electric cylinder push plate 302. Two symmetrical electric cylinder guide rods 303 are fixedly provided on the lower surface end of the electric cylinder push plate 302. The two electric cylinder guide rods 303 are slidably connected to the electric cylinder push plate 302. The first lifting mechanism 20 and the second lifting mechanism 30 can make the support rod and the lower blow needle move up and down, so that the support rod and the lower blow needle can enter the interior of the parison, thereby supporting the parison and preventing the inner wall surface of the parison from sticking together. By setting the lifting electric cylinder 301, the later automatic control can be realized, and the centralized electric control can be realized, and the electric control has higher precision and faster response. In addition, the lower blowing needle will not rub against the mold, and the blowing mouth will not contact the mold, so the mold has a longer service life.

[0032] An adjustment mechanism 40 is commonly connected to the lower surfaces of the cylinder fixing plate 103 and the electric cylinder fixing plate 104, and the adjustment mechanism 40 can be used to control the movement of the cylinder fixing plate 103 and the electric cylinder fixing plate 104. Figure 3As shown, the adjustment mechanism 40 includes: an adjustment fixing plate 402, a limit block 404, and an adjustment sliding plate 403. The adjustment fixing plate 402 is fixedly mounted on the lower surface of the electric cylinder fixing plate 104, and the adjustment sliding plate 403 is fixedly mounted on the lower surface of the cylinder fixing plate 103. A screw seat 408 is arranged inside the adjustment sliding plate 403. The limit block 404 is located between the adjustment fixing plate 402 and the adjustment sliding plate 403 and is fixedly connected to the inner surface of the bottom plate 10. The surfaces on both opposite sides of the limit block are fixed. A hollow buffer washer is fixedly provided, a driving reducer 401 is fixedly connected to one side surface of the adjusting fixed plate 402, a coupling 405 is connected to the working end of the driving reducer 401, a screw 406 is fixedly connected to one end of the coupling 405, the screw 406 passes through the interior of the limit block 404 and is movably connected to the screw seat 408, an arc-shaped avoidance groove 409 is provided at one end of the limit block 404 facing the screw 406, and one end of the screw 406 is movably connected to the fixed seat on the lower surface of the bottom plate 10. Figure 3 As shown, one end of the screw rod 406 that is movably connected to the fixed seat is set as a smooth section 407, and a gap is left between the intersection of the smooth section 407 and the screw rod 406 and the surface of one side of the fixed seat. The movement of the adjustable sliding plate 403 and the adjustable fixed plate 402 can be achieved by driving the reducer 401, and there is no need to set up multiple driving sources, which avoids the need to control multiple driving sources separately during use, increasing the cumbersomeness of control, and in order to avoid that there are driving sources that are not working, it is also necessary to configure additional sensors to monitor whether multiple driving sources are working normally, increasing the cost of use. The buffer washer can be used to buffer when the adjustable sliding plate 403 and the adjustable fixed plate 402 contact the limit block 404, avoiding damage to the adjustable sliding plate 403 and the adjustable fixed plate 402.

[0033] like Figure 3 As shown, the first limiting column 105 and the second limiting column 106 are respectively fixedly arranged on the two side surfaces of the bottom plate 10 facing the adjusting sliding plate 403 and the adjusting fixed plate 402. By setting the first limiting column 105 and the limiting block 404, after the adjusting sliding plate 403 is in contact with the first limiting column 105 and the limiting block 404, the position of the adjusting sliding plate 403 is fixed, so that the screw rod and the driving reducer can control the movement of the adjusting fixed plate 402, thereby realizing that only one driving reducer 401 can be used to simultaneously control the movement of the adjusting sliding plate 403 and the adjusting fixed plate 402.

[0034] In this embodiment, copper sleeves are provided inside the guide seat, inside the electric cylinder fixing plate 104 and inside the fixing seat, and are movably connected to the cylinder guide rod 202, the electric cylinder guide rod 303 and the smooth section 407 through the copper sleeves.

[0035] The working principle of the utility model is as follows: the extrusion blow molding machine is a prior art and its use method is also well known, so no further elaboration is made here, and only necessary brief explanation is given.

[0036] First, the adjusting sliding plate 403 and the adjusting fixed plate 402 are moved to the initial position. The specific method is: the driving reducer 401 is started to drive the screw rod 406 to rotate, and the adjusting sliding plate 403 is driven by the screw rod 406 to move in the direction of the limit block 404 until the adjusting sliding plate 403 is fitted with the limit block 404. At this time, the adjusting sliding plate 403 cannot move (forming a fixed state), and the driving reducer 401 keeps the starting screw rod 406 to continue rotating. At this time, the screw rod 406 will move to drive the driving reducer 401 and the adjusting fixed plate 402 to move in the direction of the limit block 404 until the adjusting fixed plate 402 is fitted with the limit block 404. Then, the driving reducer 401 stops. At this time, the adjusting sliding plate 403 and the adjusting fixed plate 402 are in the initial position, that is, the support rod and the lower blowing needle are in the initial position.

[0037] The extrusion blow molding machine starts the extrusion die to extrude the hollow thermoplastic parison. Then, in the process of the extrusion die extruding the thermoplastic parison, the lifting cylinder 201 and the lifting electric cylinder 301 of the lower blowing needle adjustment mechanism 40 are started simultaneously to respectively drive the cylinder push plate 203 and the electric cylinder push plate 302 to move upward (it should be noted that at this time, the adjustment sliding plate 403 and the adjustment fixed plate 402 are in the initial position, that is, one side surface of the adjustment sliding plate 403 and one side surface of the adjustment fixed plate 402 are both in close contact with the surface of the limit block 404), thereby moving the support rod and the lower blowing needle upward to the parison. Inside, when the support rod and the lower blowing needle move a certain distance, the lifting cylinder 201 and the lifting electric cylinder 301 stop, and the parison is sleeved on the outer periphery of the support rod and the lower blowing needle. Then, the reducer 401 is driven to start and drive the screw rod 406 to rotate in the opposite direction. The screw rod 406 controls the sliding plate 403 to move toward the direction of the first limit column 105. The movement of the sliding plate 403 drives the cylinder fixed plate 103 to follow the movement, so that the support rod supports the inner wall surface of the parison to a certain extent, so as to prevent the parison from getting close to each other when coming out of the extrusion die head, causing the inner wall surfaces to stick together.

[0038] When the adjusting sliding plate 403 moves a certain distance to fit the surface of the first limiting column 105, the adjusting sliding plate 403 stops (forming a fixed state). At this time, the driving reducer 401 continues to drive the screw rod 406 to rotate. Since the adjusting sliding plate 403 is fixed, only the screw rod 406 can move. The movement of the screw rod 406 drives the driving reducer 401 to control the adjusting fixed plate 402 to move in the direction of the second limiting column 106. The movement of the adjusting fixed plate 402 drives the electric cylinder fixed plate 104 to follow the movement, so that the lower blowing needle provides certain support to the inner wall surface of the parison. The inner wall of the parison is supported by the joint movement of the support rod and the lower blowing needle.

[0039] At the same time, while the support rod and the lower blowing needle are supporting the inner wall of the preform, the opened mold is closed to wrap the preform in the mold cavity, and the support rod and the lower blowing needle are also inside the mold. When the mold is closed to a certain extent, the lifting cylinder 201 is restarted to drive the cylinder push plate 203 to retract and return to its original position, so that the support rod is separated from the preform, and the mold continues to be closed until the mold is closed and the lower blowing needle is inside the mold, and then the mold is locked by a locking device (not shown in the figure), and the cutting device (not shown in the figure) cuts off the upper end of the preform to separate it from the extrusion die head, and then the lower blowing needle blows the preform in the mold so that the preform fits the inner wall of the mold to complete the processing of the blow-molded product. When the blow-molded product is processed, the locking device is unlocked, the mold is opened, and the blow-molded product is taken out by a mechanical clamp to complete the material removal of the blow-molded product.

[0040] 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. A blow needle mechanism for a fully electric extrusion blow molding machine, comprising a bottom plate, the bottom plate being arranged in a square shape, Features: Guide rails are fixedly arranged on the upper surfaces of the two opposite sides of the bottom plate, and a plurality of sliding blocks are movably arranged on the two guide rails. A cylinder fixing plate and an electric cylinder fixing plate are commonly connected on the two guide rails through the sliding blocks, and a gap is left between the cylinder fixing plate and the electric cylinder fixing plate. A first lifting mechanism is arranged at the middle section of the cylinder fixing plate, and a second lifting mechanism is arranged at the middle section of the electric cylinder fixing plate. The first lifting mechanism includes: a lifting cylinder, the lifting cylinder is fixedly arranged on the lower surface of the cylinder fixing plate, the telescopic end of the lifting cylinder extends out of the upper surface of the cylinder fixing plate, a cylinder push plate is fixedly connected to the telescopic end of the lifting cylinder, a support rod is arranged on the upper surface end of the cylinder push plate, a cylinder guide rod is fixedly arranged on the lower surface end of the cylinder push plate, and the cylinder guide rod is slidably connected to a guide seat arranged on one side surface of the cylinder fixing plate; The second lifting mechanism includes: a lifting electric cylinder, the lifting electric cylinder is fixedly arranged on the lower surface of the electric cylinder fixing plate, the telescopic end of the lifting electric cylinder extends out of the upper surface of the electric cylinder fixing plate, the telescopic end of the lifting electric cylinder is fixedly connected with an electric cylinder push plate, the upper surface end of the electric cylinder push plate is provided with a lower blow needle, and the lower surface end of the electric cylinder push plate is fixedly provided with two symmetrical electric cylinder guide rods, and the two electric cylinder guide rods are slidably connected with the electric cylinder push plate; An adjustment mechanism is commonly connected to the lower surfaces of the air cylinder fixing plate and the electric cylinder fixing plate, and the movement of the air cylinder fixing plate and the electric cylinder fixing plate can be controlled by the adjustment mechanism.

2. A lower blow needle mechanism for a fully electric extrusion blow molding machine according to claim 1, It is characterized in that The adjusting mechanism includes: an adjusting fixed plate, a limit block, and an adjusting sliding plate. The adjusting fixed plate is fixedly installed on the lower surface of the electric cylinder fixed plate, the adjusting sliding plate is fixedly installed on the lower surface of the cylinder fixed plate, a screw seat is arranged inside the adjusting sliding plate, the limit block is located between the adjusting fixed plate and the adjusting sliding plate and is fixedly connected to the inner surface of the base plate, a driving reducer is fixedly connected to one side surface of the adjusting fixed plate, a coupling is connected to the working end of the driving reducer, a screw is fixedly connected to one end of the coupling, the screw passes through the inside of the limit block and is movably connected to the screw seat, and one end of the screw is movably connected to the fixed seat on the lower surface of the base plate.

3. A lower blow needle mechanism for a fully electric extrusion blow molding machine according to claim 2, It is characterized in that One end of the screw rod movably connected to the fixing seat is arranged as a smooth section, and a distance is reserved between the intersection of the smooth section and the screw rod and a side surface of the fixing seat.

4. A lower blow needle mechanism for a fully electric extrusion blow molding machine according to claim 2, It is characterized in that An arc-shaped avoidance groove is arranged at one end of the limit block facing the screw rod.

5. A lower blow needle mechanism for a fully electric extrusion blow molding machine according to claim 2, It is characterized in that A first limiting column and a second limiting column are respectively fixedly arranged on the two side surfaces of the bottom plate facing the adjusting sliding plate and the adjusting fixing plate.

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