Lifting drive mechanism matched with bottom die of bottle blowing machine

Abstract

The application discloses a lifting driving mechanism matched with a bottom die of a bottle blowing machine, which comprises a bottom die support arranged on a base, a bottom die connecting assembly capable of moving up and down arranged on the bottom die support, a first guide block fixed with the bottom die support arranged on a first guide rod of the base, a second guide block arranged on a second guide rod of the bottom die support, rollers on the second guide block matched with a cam rail, the cam rail fixed with the bottom die connecting assembly, the cam rail comprising an inclined section cam rail and a gentle section cam rail, the bottom die kept relatively static in the vertical direction or only moved in the gap allowance between the clamping ring on the side die and the clamping groove on the bottom die when the rollers are located at the position of the gentle section cam rail, one end of a first swing rod hinged with the first guide block, the other end of the first swing rod hinged on the base through a connecting rod mechanism, and two ends of a second swing rod respectively hinged with the second guide block and the base. The application has the advantages of simple movement mode, easy control and improved stability of the mold opening and closing movement.

Description

Technical Field

[0001] This invention relates to the field of liquid packaging equipment technology, and more specifically to the lifting drive mechanism of the bottom mold in a blow molding machine. Background Technology

[0002] Blow molding machines are key equipment for producing plastic containers for liquid packaging. A blow molding machine includes a pair of side molds and a bottom mold. The side molds are divided into a moving mold and a fixed mold. Clamping rings and grooves are provided between the inner walls of the lower ends of the moving and fixed molds and the outer wall of the bottom mold. The top surfaces of the clamping rings and grooves are inclined surfaces with the same direction of inclination. In the closed state, the moving and fixed molds close together outside the bottom mold, and the clamping rings and grooves between the moving, fixed, and bottom molds interlock to form a mold cavity. During the mold opening process, the moving mold rotates outward. At the beginning of the rotation, since the retaining rings and grooves between the moving mold, the fixed mold, and the bottom mold are not yet disengaged, the bottom mold is required to move away from the fixed mold during the initial rotation of the moving mold. In the vertical direction, it needs to remain relatively stationary or only move within the gap between the retaining rings and grooves. As the moving mold continues to rotate, the bottom mold continues to move away from the fixed mold until the retaining rings on the moving mold and the fixed mold are completely disengaged from the grooves on the bottom mold. Then, the bottom mold moves downward by a large displacement to avoid interference between the formed container and the bottom mold during the bottle removal process.

[0003] Currently, during the mold opening and closing process, the movement trajectory of the bottom mold is a spatial curve, which is complex and difficult to control. The current lifting drive mechanism for the bottom mold also has a complex structure. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a lifting drive mechanism for the bottom mold of a blow molding machine. The structure of the lifting drive mechanism is greatly simplified, the running trajectory is simple, and it is easy to control.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a lifting drive mechanism for the bottom mold in a blow molding machine, comprising: a base, a bottom mold support on the base, a bottom mold connecting assembly for connecting the bottom mold on the bottom mold support, the bottom mold connecting assembly being movably mounted on the bottom mold support and capable of vertical up and down movement, a plurality of first guide rods being arranged parallel to each other on the base, a first guide block being slidably mounted on the first guide rod, the bottom mold support being fixed to the first guide block; a plurality of second guide rods being arranged parallel to each other on the bottom mold support, each second guide rod being perpendicular to the first guide rod, a second guide block being slidably mounted on the second guide rod, a roller being arranged on the side of the second guide block near the bottom mold connecting assembly, the roller cooperating with a cam guide rail, the cam guide rail being fixedly connected to the bottom mold connecting assembly, the cam guide rail including an inclined section cam guide rail and a flat section cam guide rail, the flat section cam guide rail being located at the lower end of the inclined section cam guide rail; One end of the first swing rod is hinged to the first guide block through the first hinge shaft, and the other end of the first swing rod is hinged to one end of the first connecting rod through the second hinge shaft. The other end of the first connecting rod is hinged to the base through the third hinge shaft; one end of the second swing rod is hinged to the second guide block through the fourth hinge shaft, and the other end of the second swing rod is hinged to the base through the fifth hinge shaft; the first hinge shaft, the second hinge shaft, the third hinge shaft, the fourth hinge shaft, and the fifth hinge shaft are all vertically and parallelly arranged.

[0006] The reciprocating swing of the first connecting rod can drive the first guide block to reciprocate horizontally on the first guide rod, so as to drive the bottom die support on the first guide block to drive the bottom die to reciprocate;联动地驱使第二导向块在第二导向杆上来回平移,从而驱使第二导向块上的滚子在凸轮导轨的导向下与凸轮导轨发生相对运动,进而驱使凸轮导轨带动与其固定连接的底模连接组件在竖直方向上、下运动,平缓段凸轮导轨的形状确保当滚子位于平缓段凸轮导轨位置时,与底模连接组件相连接的底模在竖直方向保持相对静止、或只在边模与底模之间的卡环与卡槽之间的间隙范围内的运动。

[0007] Further, the lifting drive mechanism for the bottom die in the blow molding machine mentioned above, wherein two first baffles are arranged at intervals on the base, and two first guide rods are arranged horizontally at intervals between the two first baffles; two first guide through holes are opened on the first guide block, and each first guide rod is correspondingly inserted into a first guide through hole; the first guide block reciprocates horizontally between the two first baffles under the guidance of the first guide rod.

[0008] Further, the lifting drive mechanism for the bottom die in the blow molding machine mentioned above, wherein two second baffles are arranged at intervals on the bottom die support, and two second guide rods are arranged between the two second baffles. The two second guide rods are arranged at intervals in the height direction. Two second guide through holes are opened on the second guide block, and the two second guide rods are respectively inserted into a second guide through hole; the second guide block reciprocates horizontally between the two second baffles under the guidance of the second guide rod.

[0009] Even further, the lifting drive mechanism for the bottom die in the blow molding machine mentioned above, wherein the second guide block and the second guide rod are both arranged above the first guide rod.

[0010] Further, the lifting drive mechanism for the bottom die in the blow molding machine mentioned above, wherein the bottom die connecting component includes: a sliding rod, a connecting block for fixing to the bottom die is arranged at the top of the sliding rod, the sliding rod is clamped in the sliding groove on the bottom die support, and the sliding rod moves vertically up and down under the guidance of the sliding groove; the cam guide rail is fixedly connected to the sliding rod.

[0011] It should be noted that there is an incorrect expression in the original text of item . I have translated it according to the correct understanding as much as possible. The incorrect part is "联动地驱使第二导向块在第二导向杆上来回平移,从而驱使第二导向块上的滚子在凸轮导轨的导向下与凸轮导轨发生相对运动,进而驱使凸轮导轨带动与其固定连接的底模连接组件在竖直方向上、下运动,平缓段凸轮导轨的形状确保当滚子位于平缓段凸轮导轨位置时,与底模连接组件相连接的底模在竖直方向保持相对静止、或只在边模与底模之间的卡环与卡槽之间的间隙范围内的运动。", which may need to be further clarified and corrected in the original text for a more accurate translation.Furthermore, in the aforementioned lifting drive mechanism for the bottom mold of the blow molding machine, a pair of first connecting ears are provided on the first guide block, with the pair of first connecting ears positioned above and below each other. The first hinge shaft is vertically mounted on the pair of first connecting ears, and the first swing arm is positioned on the first hinge shaft between the pair of first connecting ears. A pair of second connecting ears are provided on the second guide block, with the pair of second connecting ears positioned above and below each other. The fourth hinge shaft is vertically mounted on the pair of second connecting ears, and the second swing arm is positioned on the fourth hinge shaft between the pair of second connecting ears.

[0012] The advantages of this invention are: 1. The lifting drive mechanism for the bottom mold in the blow molding machine has a simple structure and reliable operation. 2. Under the drive of this mechanism, the bottom mold moves in a planar motion, which is simple and easy to control, thereby improving the stability of the mold opening and closing motion. 3. Due to the greatly simplified structure, friction is effectively reduced, thus effectively extending the service life of the mechanism and reducing the manufacturing and operating costs of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the lifting drive mechanism for the bottom mold of a blow molding machine, as described in this invention. The roller is located on the cam guide rail in the flat section.

[0014] Figure 2 This is a schematic diagram of the lifting drive mechanism for the bottom mold of a blow molding machine, as described in this invention. The roller is located on the inclined section of the cam guide rail.

[0015] Figure 3 This is a structural schematic diagram of the bottom mold connection assembly.

[0016] Figure 4 This is a schematic diagram of the mold in a blow molding machine. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments.

[0018] First, let's introduce the mold structure in a blow molding machine, such as... Figure 4As shown, the blow molding die includes a pair of side molds and a bottom mold 10. The pair of side molds are divided into a moving mold 20 and a fixed mold 30. The outer walls of the pair of side molds are provided with outwardly protruding wedge-shaped retaining rings 102 with inclined tops, and the outer walls of the bottom mold 10 are provided with inwardly recessed wedge-shaped grooves 101 with inclined tops. In the closed state, the moving mold 20 and the fixed mold 30 are engaged and closed outside the bottom mold 10, and the wedge-shaped retaining rings 102 on the moving mold 20 and the fixed mold 30 are engaged in the wedge-shaped grooves 101 on the outer walls of the bottom mold 10. When the mold is opened, the moving mold 20 rotates outward relative to the fixed mold 30, and the bottom mold 10 translates away from the fixed mold 30. At the beginning of the operation, the wedge-shaped retaining ring 102 and the wedge-shaped retaining groove 101 are still in a mutually blocking state. The moving mold 20 continues to rotate outward relative to the fixed mold 30, and the bottom mold 10 continues to translate away from the fixed mold 30. When the wedge-shaped retaining ring 102 and the wedge-shaped retaining groove 101 are completely disengaged, the bottom mold 10 moves downward to avoid interference with the container during the bottle picking operation.

[0019] In order to drive the bottom mold 10 to complete the above actions, such as Figure 1 , Figure 2 , Figure 3 As shown, the lifting drive mechanism for the bottom mold in the blow molding machine includes: a base 1, a bottom mold support 2 on the base 1, a bottom mold connecting component 3 for connecting the bottom mold 10 on the bottom mold support 2, and the bottom mold connecting component 3 being movably mounted on the bottom mold support 2 so as to move vertically up and down.

[0020] A plurality of first guide rods 41 are arranged in parallel on the base 1. A first guide block 4 is slidably mounted on the first guide rods 41. The bottom mold support 2 is fixed to the first guide block 4. A plurality of second guide rods 51 are arranged in parallel on the bottom mold support 2. Each second guide rod 51 is perpendicular to the first guide rod 41. A second guide block 5 is slidably mounted on the second guide rod 51. A roller 6 is provided on the side of the second guide block 5 near the bottom mold connecting assembly 3. The roller 6 cooperates with the cam guide rail 7. The cam guide rail 7 is fixedly connected to the bottom mold connecting assembly 3. The cam guide rail 7 includes an inclined section cam guide rail 71 and a gentle section cam guide rail 72. The gentle section cam guide rail 72 is located at the lower end of the inclined section cam guide rail 71.

[0021] The bottom mold connecting assembly 3 includes: a slide rod 31, the top of which is provided with a connecting block 32 for fixing with the bottom mold 10; the slide rod 31 is engaged in a sliding groove 22 on the bottom mold support 2; the slide rod 31 moves vertically up and down under the guidance of the sliding groove 22; and the cam guide rail 7 is fixedly connected to the slide rod 31.

[0022] One end of the first swing arm 8 is hinged to the first guide block 4 via a first hinge shaft 81, and the other end of the first swing arm 8 is hinged to one end of the first connecting rod 83 via a second hinge shaft 82. The other end of the first connecting rod 83 is hinged to the base 1 via a third hinge shaft 84. In this embodiment, a pair of first connecting ears 42 are provided on the first guide block 4, which are arranged vertically on top of each other. The first hinge shaft 81 is vertically mounted on the pair of first connecting ears 42, and the first swing arm 8 is arranged on the first hinge shaft 81 between the pair of first connecting ears 42.

[0023] One end of the second swing arm 9 is hinged to the second guide block 5 via the fourth hinge shaft 91, and the other end of the second swing arm 9 is hinged to the base 1 via the fifth hinge shaft 92. The first hinge shaft 81, the second hinge shaft 82, the third hinge shaft 84, the fourth hinge shaft 91, and the fifth hinge shaft 92 are all vertically arranged. The second guide block 5 is provided with a pair of second connecting ears 52, which are arranged vertically above and below each other. The fourth hinge shaft 91 is vertically installed on the pair of second connecting ears 52, and the second swing arm 9 is arranged on the fourth hinge shaft 91 between the pair of second connecting ears 52.

[0024] Specifically, two first baffles 11 are spaced apart on the base 1, and two first guide rods 41 are horizontally spaced between the two first baffles 11; two first guide holes are opened on the first guide block 4, and each first guide rod 41 is inserted into one of the first guide holes; the first guide block 4 moves back and forth between the two first baffles 41 under the guidance of the first guide rods 41.

[0025] Two second baffles 21 are spaced apart on the bottom mold support 2, and two second guide rods 51 are positioned between the two second baffles 21. The two second guide rods 51 are spaced apart in the height direction. The second guide block 5 has two second guide through holes, and the two second guide rods 51 are respectively inserted into one of the second guide through holes. The second guide block 5 moves back and forth between the two second baffles 21 under the guidance of the second guide rods 51. The second guide block 5 and the second guide rods 51 are both positioned above the first guide rod 41.

[0026] The first link 83 swings back and forth, which drives the first guide block 4 to move back and forth on the first guide rod 41 via the first swing rod 8. This drives the bottom mold support 2 on the first guide block 4 to move the bottom mold 10 back and forth. It also drives the second guide block 5 to move back and forth on the second guide rod 51. This drives the roller 6 on the second guide block 5 to move relative to the cam guide rail 7 under the guidance of the cam guide rail 7. This drives the cam guide rail 7 to drive the bottom mold connecting assembly 3, which is fixedly connected to it, to move up and down in the vertical direction. The shape of the smooth section cam guide rail 72 ensures that when the roller 6 is in the position of the smooth section cam guide rail 72, the bottom mold 10 connected to the bottom mold connecting assembly 3 remains relatively stationary in the vertical direction, or moves only within the gap range between the retaining ring and the retaining groove between the side mold and the bottom mold.

[0027] The specific driving process of the above-mentioned lifting drive mechanism is as follows: The first link 83 can be driven in conjunction with the drive mechanism that drives the opening and closing movement of the moving mold 20. For example... Figure 1 As shown, during mold opening, the moving mold 20 opens outwards, and the end of the first connecting rod 83 located on the second hinge shaft 82 rotates clockwise relative to the end located on the third hinge shaft 84. The first guide block 4 translates on the first guide rod 41 in a direction away from the fifth hinge shaft 92, thereby driving the bottom mold support 2 on the first guide block 4 to move the bottom mold 10 in a direction away from the fixed mold 30. Simultaneously, the second guide block 5 translates on the second guide rod 51 in a direction away from the first swing rod 8, and the second guide block 5... Roller 6 moves under the guidance of the smooth section cam guide rail 72. At the beginning of the mold opening process, the wedge retaining rings 102 on the moving mold 20 and the fixed mold 30 have not yet disengaged from the wedge retaining grooves 101 on the bottom mold 10. At this time, roller 6 is in the position of the smooth section cam guide rail 72. The shape of the smooth section cam guide rail 72 ensures that the bottom mold 10 connected to the bottom mold connecting assembly 3 remains relatively stationary in the vertical direction during this period, or moves only in the gap between the retaining rings and grooves between the side mold and the bottom mold.

[0028] The moving mold 20 continues to open outwards, and the end of the first connecting rod 83 located at the second hinge shaft 82 continues to swing clockwise relative to the end located at the third hinge shaft 84. The first guide block 4 continues to translate away from the fifth hinge shaft 92, and the bottom mold 10 continues to translate away from the fixed mold 30. Simultaneously, the second guide block 5 translates away from the first swing rod 8, and the roller 6 on the second guide block 5 enters the inclined section cam guide rail 71. The wedge-shaped retaining rings 102 on the moving mold 20 and the fixed mold 30 completely disengage from the wedge-shaped retaining grooves 101 on the bottom mold 10. At this time, the roller 6 moves under the guidance of the inclined section cam guide rail 71, and the bottom mold 10 connected to the bottom mold connecting assembly 3 moves vertically downwards until it reaches its position. Figure 2 As shown.

[0029] The above describes the mold opening process; the mold closing process is simply the reverse of the above steps.

[0030] The advantages of this invention are as follows: 1. The lifting drive mechanism for the bottom mold in the blow molding machine has a simple structure and reliable operation. 2. Under the drive of this mechanism, the bottom mold moves in a planar motion, which is simple and easy to control, thereby improving the stability of the mold opening and closing motion. 3. Due to the greatly simplified structure, friction is effectively reduced, thus effectively extending the service life of the mechanism and reducing the manufacturing and operating costs of the equipment.

Claims

1. A lifting drive mechanism for the bottom mold in a blow molding machine, comprising: A base, on which a bottom mold support is mounted, and on which a bottom mold connecting assembly for connecting the bottom mold is mounted, characterized in that: the bottom mold connecting assembly is movably mounted on the bottom mold support, capable of vertical up and down movement; a plurality of first guide rods are arranged parallel to each other on the base; a first guide block is slidably mounted on the first guide rods; the bottom mold support is fixed to the first guide block; a plurality of second guide rods are arranged parallel to each other on the bottom mold support, each second guide rod being perpendicular to the first guide rod; a second guide block is slidably mounted on the second guide rod; a roller is provided on the side of the second guide block near the bottom mold connecting assembly; the roller cooperates with a cam guide rail; the cam guide rail is fixedly connected to the bottom mold connecting assembly; the cam guide rail includes an inclined section cam guide rail and a flat section cam guide rail, the flat section cam guide rail being located at the lower end of the inclined section cam guide rail; One end of the first swing arm is hinged to the first guide block via a first hinge shaft, and the other end of the first swing arm is hinged to one end of the first connecting rod via a second hinge shaft. The other end of the first connecting rod is hinged to the base via a third hinge shaft. One end of the second swing arm is hinged to the second guide block via a fourth hinge shaft, and the other end of the second swing arm is hinged to the base via a fifth hinge shaft. The first, second, third, fourth, and fifth hinge shafts are all vertically parallel. The first link swings back and forth, driving the first guide block to move back and forth on the first guide rod, thereby driving the bottom mold support on the first guide block to move back and forth on the bottom mold; it also drives the second guide block to move back and forth on the second guide rod, thereby driving the roller on the second guide block to move relative to the cam guide rail under the guidance of the cam guide rail, and then driving the cam guide rail to drive the bottom mold connecting assembly fixedly connected to it to move up and down in the vertical direction. The shape of the smooth section of the cam guide rail ensures that when the roller is in the position of the smooth section of the cam guide rail, the bottom mold connected to the bottom mold connecting assembly remains relatively stationary in the vertical direction, or only moves within the gap range between the retaining ring and the retaining groove between the side mold and the bottom mold.

2. The lifting drive mechanism for the bottom mold in a blow molding machine according to claim 1, characterized in that: Two first baffles are spaced apart on the base, and two first guide rods are horizontally spaced between the two first baffles. Two first guide holes are opened on the first guide block, and each first guide rod passes through one of the first guide holes. The first guide block moves back and forth between the two first baffles under the guidance of the first guide rods.

3. The lifting drive mechanism for the bottom mold in a blow molding machine according to claim 1, characterized in that: Two second baffles are spaced apart on the bottom mold support, and two second guide rods are arranged between the two second baffles. The two second guide rods are spaced apart in the height direction. Two second guide through holes are opened on the second guide block, and the two second guide rods are respectively inserted into one of the second guide through holes. The second guide block moves back and forth between the two second baffles under the guidance of the second guide rods.

4. The lifting drive mechanism for the bottom mold in a blow molding machine according to claim 3, characterized in that: The second guide block and the second guide rod are both positioned above the first guide rod.

5. The lifting drive mechanism for the bottom mold of a blow molding machine according to claim 1, 2, or 3, characterized in that: The bottom mold connecting assembly includes: a slide rod, the top of which is provided with a connecting block for fixing to the bottom mold; the slide rod is engaged in a sliding groove on the bottom mold support; the slide rod moves vertically up and down under the guidance of the sliding groove; and the cam guide rail is fixedly connected to the slide rod.

6. The lifting drive mechanism for the bottom mold in a blow molding machine according to claim 1, 2, or 3, characterized in that: The first guide block is provided with a pair of first connecting ears, which are arranged above and below each other. The first hinge shaft is vertically installed on the pair of first connecting ears, and the first swing rod is arranged on the first hinge shaft between the pair of first connecting ears. The second guide block is provided with a pair of second connecting ears, which are arranged above and below each other. The fourth hinge shaft is vertically installed on the pair of second connecting ears, and the second swing rod is arranged on the fourth hinge shaft between the pair of second connecting ears.

Images