Blow-molding machine with lower blow and support cooling mechanism

Abstract

The application discloses a lower blowing supporting and cooling mechanism of a blowing machine, which comprises a bottom plate installed on the blowing machine, a supporting frame installed right above the bottom plate, a blowing needle assembly and a supporting assembly installed on the supporting frame, and a lifting assembly transmissionally connected between the bottom plate and the supporting frame; the supporting frame comprises a mounting plate and a moving plate located below the mounting plate; the blowing needle assembly comprises a protective sleeve fixed in the middle of the mounting plate, a blowing needle penetrating through the protective sleeve, and a blowing needle cylinder in gas communication with the blowing needle, the blowing needle cylinder being used for driving the blowing needle to move up and down and capable of supplying gas into the blowing needle; the supporting assembly comprises a pair of supporting rods arranged on the left and right sides of the blowing needle respectively, each supporting rod extending in the up-down direction and internally having a cooling flow channel for conveying cooling water; the lifting assembly is used for driving the moving plate to move up and down relative to the bottom plate; the application accelerates the cooling speed of the material embryo by reducing the surface temperature of the supporting rod, simplifies the structure of the blowing needle, and greatly reduces the damage rate of the blowing needle.

Description

Technical Field

[0001] This application relates to the field of blow molding technology, and in particular to a cooling mechanism for the lower blow support material of a blow molding machine. Background Technology

[0002] The lower blow molding mechanism of a blow molding machine is an important component to ensure product quality. It mainly improves the quality of blow-molded products and ensures uniform wall thickness by accurately expanding and stabilizing the flexible preform. However, currently, after the preform is blown, the flash at the lower end of the preform often sticks to the mold itself because it has not cooled completely, making it difficult to remove the molded preform from the mold. In addition, during the blow molding process, the blow needle often collides with the mold and is damaged due to inaccurate positioning or failure to withdraw in time. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide a cooling mechanism for the lower blow support material of a blow molding machine.

[0004] To achieve the above objectives, this application adopts the following technical solution: a lower blow molding material cooling mechanism for a blow molding machine, comprising: The base plate is mounted on the blow molding machine and located below the mold closing mechanism of the blow molding machine; A support frame is installed directly above the base plate. The support frame includes a mounting plate and a movable plate located below the mounting plate. Both the mounting plate and the movable plate are parallel to the base plate. A blow needle assembly is installed in the middle of the mounting plate. The blow needle assembly includes a protective sleeve fixed to the mounting plate, a blow needle passing through the protective sleeve, and a blow needle cylinder communicating with the blow needle gas. The blow needle has a center line extending in the vertical direction, and the blow needle and the blow needle cylinder are detachably connected. The blow needle cylinder is used to drive the blow needle to move back and forth relative to the protective sleeve along the center line and can supply gas into the blow needle. The material support assembly includes a pair of material support rods respectively arranged on the left and right sides of the blow needle. Each material support rod extends vertically and has internal cooling channels for supplying cooling water. The cooling channels of each material support rod are connected to an external water source. The lifting assembly is connected between the base plate and the movable plate, and is used to drive the movable plate to move in the vertical direction relative to the base plate.

[0005] In the above technical solution, a further preferred embodiment is that the base plate is provided with a plurality of first adjustment holes, all of which are straight slot holes, and the size of each of the first adjustment holes in the front-back direction is greater than its size in the left-right direction.

[0006] In the above technical solution, a further preferred embodiment is that the mounting plate is provided with a second adjustment hole for the protective sleeve to pass through and a pair of third adjustment holes for the pair of support rods to pass through respectively. The second adjustment hole and the pair of third adjustment holes are both straight slot holes, and the dimensions of the second adjustment hole and the pair of third adjustment holes in the left-right direction are greater than the dimensions in the front-back direction.

[0007] In the above technical solution, a further preferred embodiment is that the bottom of the blow needle cylinder is threaded with an air pipe connector, one end of which is connected to an external air source, and the other end is connected to the blow needle through the blow needle cylinder.

[0008] In the above technical solution, it is further preferred that the end of the blow needle is threadedly connected to the telescopic rod of the blow needle cylinder.

[0009] In the above technical solution, it is further preferred that each of the cooling channels forms an independent water inlet and outlet at the bottom of the support rod, and both the water inlet and the water outlet are connected to the external water source.

[0010] In the above technical solution, a further preferred embodiment is that the lifting assembly includes a hydraulic motor mounted on the base plate, a drive gear connected to the hydraulic motor, a driven gear meshing with the drive gear, and a lifting cylinder passing through the driven gear. The hydraulic motor is used to drive the drive gear to rotate around its own axis. The outer wall of the lifting cylinder is threadedly connected to the inner wall of the driven gear, and the lifting cylinder is configured to move in the vertical direction when the driven gear rotates. The telescopic rod of the lifting cylinder is connected to the moving plate.

[0011] In the above technical solution, a further preferred embodiment is that a connecting cover is also installed on the base plate. The connecting cover covers the outside of the driving gear and the driven gear. The connecting cover and the base plate are respectively provided with a first through hole and a second through hole for the lifting cylinder to pass through. The first through hole and the second through hole are arranged vertically opposite each other.

[0012] In the above technical solution, a further preferred embodiment is that the lifting cylinder is fitted with a pair of thrust ball bearings, the pair of thrust ball bearings being located above and below the driven gear respectively, one of the thrust ball bearings being arranged between the driven gear and the connecting cover, and the other thrust ball bearing being arranged between the driven gear and the base plate.

[0013] In the above technical solution, a further preferred embodiment is that a plurality of guide components are connected between the moving plate and the base plate, and the plurality of guide components are arranged on the outside of the lifting component in a left-right opposite manner; each guide component includes a straight sleeve bearing installed on the base plate and a guide post passing through the straight sleeve bearing, each guide post extending in the vertical direction, and the top of each guide post being connected to the moving plate.

[0014] Compared with the prior art, this application achieves the following beneficial effects: The support rod of this application has an internal connection to an external water source to form a cooling water circulation, which reduces the surface temperature of the support rod and accelerates the cooling speed of the blank, making it less likely for the blank to stick to the mold sides after the mold opens; the blow needle assembly has a simple structure, which facilitates timely replacement of damaged blow needles. A protective sleeve is installed on the outside of the blow needle. The blow needle will only push out of the protective sleeve to blow air onto the blank during the blowing process. At other times, the blow needle will retract into the protective sleeve, which greatly reduces the damage rate of the blow needle. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a lower blow support material cooling mechanism for a blow molding machine provided in an embodiment of this application; Figure 2 for Figure 1 A top view of the lower blower material cooling mechanism in the middle; Figure 3 For along Figure 2 A sectional view cut along line AA in the diagram; Figure 4 for Figure 3 A schematic diagram of the blow needle assembly in the diagram; Figure 5 for Figure 3 A schematic diagram of the support assembly in the diagram.

[0016] The components are as follows: 100. Downward blowing material cooling mechanism; 1. Base plate; 11. First adjustment hole; 2. Support frame; 21. Mounting plate; 211. Second adjustment hole; 212. Third adjustment hole; 22. Moving plate; 23. Side plate; 3. Blowing needle assembly; 31. Protective sleeve; 32. Blowing needle; 33. Blowing needle cylinder; 331. Cylinder body; 332. Telescopic rod; 333. Piston part; 34. Air pipe connector; 4. Material support assembly; 41. Material support rod; 42. Water inlet; 43. Water outlet; 44. Water pipe connector; 45. Locking nut; 5. Lifting assembly; 51. Oil motor; 52. Drive gear; 53. Driven gear; 54. Lifting cylinder; 55. Connecting cover; 56. Thrust ball bearing; 6. Guide assembly; 61. Straight sleeve bearing; 62. Guide column. Detailed Implementation

[0017] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0018] This application provides a lower blow molding material cooling mechanism for a blow molding machine. The lower blow molding material cooling mechanism is installed on the blow molding machine and is used to blow air and cool the blank when the mold closing mechanism closes the mold.

[0019] like Figure 1 As shown, the lower blow support material cooling mechanism 100 of the blow molding machine includes: a base plate 1 mounted on the blow molding machine, a support frame 2 located directly above the base plate 1, a blow needle assembly 3 and a material support assembly 4 mounted on the support frame 2, and a lifting assembly 5 connected between the base plate 1 and the support frame 2.

[0020] The base plate 1 is located below the mold closing mechanism, and the support frame 2 is supported on the blow molding machine by the lifting assembly 5. The base plate 1 has multiple first adjustment holes 11, and the base plate 1 is fixedly installed on the blow molding machine by mechanical fasteners passing through each of the first adjustment holes 11. The multiple first adjustment holes 11 are straight slot holes, and each first adjustment hole 11 is constructed such that its size in the front-back direction is larger than its size in the left-right direction, so that the base plate 1 can be adjusted in the front-back direction through the multiple first adjustment holes 11, thereby facilitating the adjustment of the position of the blow needle assembly 3 in the front-back direction.

[0021] The support frame 2 includes a mounting plate 21, a movable plate 22 located directly below the mounting plate 21, and a pair of side plates 23 arranged opposite each other on the left and right. The mounting plate 21 and the movable plate 22 are both parallel to the base plate 1, and the mounting plate 21, the movable plate 22, and the base plate 1 are arranged sequentially from top to bottom. The pair of side plates 23 are both perpendicular to the mounting plate 21. One side plate 23 connects the left end of the mounting plate 21 and the left end of the movable plate 22, and the other side plate 23 connects the right end of the mounting plate 21 and the right end of the movable plate 22. The bottom of each side plate 23 is provided with a stepped portion that cooperates with the movable plate 22. The stepped portion abuts against the movable plate 22 to strengthen the connection with the movable plate 22 and the stability of the support frame 2.

[0022] like Figure 1 , 3As shown in Figure 4, the blow needle assembly 3 is installed in the middle of the mounting plate 21. The blow needle assembly 3 includes a protective sleeve 31 fixed on the mounting plate 21, a blow needle 32 passing through the protective sleeve 31, and a blow needle cylinder 33 that is in gas communication with and driven by the blow needle 32. The blow needle 32 has a center line X1 extending in the vertical direction. The blow needle cylinder 33 is used to drive the blow needle 32 to move back and forth relative to the protective sleeve 31 along the center line and can supply air into the blow needle 32. The blow needle 32 extends out of the protective sleeve 31 only when the blow needle 32 blows air. At other times, the blow needle 32 retracts into the protective sleeve 31, which greatly reduces the damage rate of the blow needle.

[0023] The blow-needle cylinder 33 has a cylinder body 331 fixedly installed at the bottom of the protective sleeve 31 and a telescopic rod 332 that can move up and down through the cylinder body 331. The cylinder body 331 is hollow inside, and the telescopic rod 332 has a piston part 333 that is always confined within the cylinder body 331. The bottom of the blow-needle 32 is threadedly connected to the upper end of the telescopic rod 332, making it easy to remove the blow-needle 32 from the telescopic rod 332. A gas pipe connector 34 is threadedly connected to the bottom of the telescopic rod 332, and the inside of the telescopic rod 332 has a gas passage connecting the blow-needle 32 and the gas pipe connector 34. One end of the gas pipe connector 34 is connected to an external gas source, and the other end is connected to the blow-needle 32 through the gas passage inside the telescopic rod 332.

[0024] When blowing air onto the blank, the blow needle cylinder 33 pushes the blow needle 32 upward, so that most of the blow needle 32 extends out of the protective sleeve 31 and inserts into the mold. At this time, the external air source supplies air to the blow needle 32 to blow air onto the blank. After blowing is completed, the blow needle cylinder 33 pulls the blow needle 32 downward, so that the blow needle 32 is completely submerged in the protective sleeve 31 to protect the blow needle 32. At this time, the external air source stops supplying air to the blow needle 32.

[0025] like Figure 1 , 3 As shown in Figure 5, the material support assembly 4 includes a pair of material support rods 41 respectively arranged on the left and right sides of the blow needle 32. Each material support rod 41 extends vertically and has a cooling channel for supplying cooling water. The cooling channel of each material support rod 41 is connected to an external water source. Each cooling channel forms an independent inlet 42 and outlet 43 at the bottom of the material support rod 41. Both the inlet 42 and outlet 43 are threaded with water pipe connectors 44, which are connected to an external water source. A condenser is also connected between the outlet 43 and the external water source to reduce the temperature of the cooling water. The cooled water is then returned to the cooling channel through the inlet 42, achieving water circulation. When the pair of material support rods 41 support the material blank, cooling water circulates in the cooling channel to cool the material blank.

[0026] like Figure 1 , 2As shown, the mounting plate 21 has a second adjustment hole 211 for the protective sleeve 31 to pass through and a pair of third adjustment holes 212 for a pair of support rods 41 to pass through respectively. The second adjustment hole 211 and the pair of third adjustment holes 212 are both straight slot holes. The dimensions of the second adjustment hole 211 and the pair of third adjustment holes 212 in the left-right direction are larger than the dimensions in the front-back direction, so that the protective sleeve 31 can be adjusted in the left-right direction in the second adjustment hole 211 to adjust the position of the blow needle 32 in the left-right direction, and each support rod 41 can be adjusted in the left-right direction in the third adjustment hole 212.

[0027] like Figure 3 , 5 As shown, the bottom of the support rod 41 is pressed against the lower surface of the mounting plate 21 through the water pipe connector 44, and then the support rod 41 is locked on the top of the mounting plate 21 by a locking nut 45 to fix the support rod 41 on the mounting plate 21.

[0028] like Figure 1 , 3 As shown, the lifting assembly 5 is connected between the base plate 1 and the moving plate 22, and is used to drive the moving plate 22 to move relative to the base plate 1 in the vertical direction.

[0029] The lifting assembly 5 includes a hydraulic motor 51 mounted on the base plate 1, a drive gear 52 connected to the hydraulic motor 51, a driven gear 53 meshing with the drive gear 52, and a lifting cylinder 54 passing through the driven gear 53. The hydraulic motor 51 is used to drive the drive gear 52 to rotate around its own axis. The outer wall of the lifting cylinder 54 is threadedly connected to the inner wall of the driven gear 53, and the lifting cylinder 54 is configured to move in the up and down direction when the driven gear 53 rotates. The telescopic rod of the lifting cylinder 54 is connected to the moving plate 22.

[0030] When the hydraulic motor 51 is working, the drive gear 52 rotates under the drive of the hydraulic motor 51, and the driven gear 53 meshing with the drive gear 52 rotates with the drive gear 52. When the driven gear 53 rotates, the lifting cylinder 54 moves up and down in the vertical direction under the transmission of the driven gear 53, thereby driving the moving plate 22 to move up and down relative to the base plate 1. The lifting cylinder 54 drives the moving plate 22 to move up and down relative to the base plate 1 through the telescopic rod. The threaded connection between the driven gear 53 and the lifting cylinder 54 and the operation of the lifting cylinder 54 enable the moving plate 22 to achieve secondary displacement in the vertical direction relative to the base plate 1.

[0031] A connecting cover 55 is also installed on the base plate 1. The connecting cover 55 covers the outside of the driving gear 52 and the driven gear 53, and plays a protective role to prevent external debris from entering between the driving gear 52 and the driven gear 53.

[0032] The connecting cover 55 and the base plate 1 are respectively provided with a first through hole and a second through hole for the lifting cylinder 54 to pass through, and the first through hole and the second through hole are arranged opposite each other vertically.

[0033] A pair of thrust ball bearings 56 are fitted onto the lifting cylinder 54. The thrust ball bearings 56 are located above and below the driven gear 53, respectively. One thrust ball bearing 56 is positioned between the driven gear 53 and the connecting cover 55, while the other thrust ball bearing 56 is positioned between the driven gear 53 and the base plate 1. The pair of thrust ball bearings 56 allows the lifting cylinder 54 to move smoothly up and down relative to the driven gear 53, helping to alleviate the axial load between the driven gear 53 and the connecting cover 55 and the base plate 1, and increasing the smoothness of the lifting process.

[0034] Multiple guide components 6 are connected between the moving plate 22 and the base plate 1, and are arranged lateral to lateral on the outer side of the lifting assembly 5. Each guide component 6 includes a straight sleeve bearing 61 mounted on the base plate 1 and a guide post 62 passing through the straight sleeve bearing 61. Each guide post 62 extends vertically, and its top is connected to the moving plate 22. When the lifting assembly 5 drives the moving plate 22 to move up and down, each guide post 62 cooperates with the corresponding straight sleeve bearing 61, so that the moving plate 22 can always maintain horizontal movement during the lifting process.

[0035] The working principle of this application is as follows: First, the position of the support frame 2 in the vertical direction is adjusted. The hydraulic motor 51 drives the drive gear 52 to rotate, which in turn drives the meshing driven gear 53 to rotate. Under the transmission of the driven gear 53, the lifting cylinder 54 moves in the vertical direction to a suitable position, and then the hydraulic motor 51 stops working. Then, when the blank is extruded into the mold, the lifting cylinder 54 lifts the support frame 2 upward, so that the blow needle assembly 3 and the material support assembly 4 move upward and approach the mold closing position. Subsequently, the mold closes, and the blow needle cylinder 33 blows the blow needle 3... 2. The blow needle 32 extends out from the protective sleeve 31 and is inserted into the mold. An external air source supplies air to the blow needle 32, causing the blow needle 32 to blow air onto the blank. The cooling channels in the pair of support rods 41 of the support assembly 4 circulate cooling water to enhance the cooling effect on the blank. After the blank blowing process is completed, the blow needle cylinder 33 drives the blow needle 32 to retract into the protective sleeve 31. The external air source stops supplying air, and the lifting cylinder 54 moves the support frame 2 downward, so that the blow needle assembly 3 and the support assembly 4 are away from the mold closing position. This lower blow support cooling mechanism completes one blank blowing.

[0036] The support rod of this application has an internal connection to an external water source to form a cooling water circulation, which reduces the surface temperature of the support rod and accelerates the cooling speed of the blank, making it less likely for the blank to stick to the mold sides after the mold opens; the blow needle assembly has a simple structure, which facilitates timely replacement of damaged blow needles. A protective sleeve is installed on the outside of the blow needle. The blow needle will only push out of the protective sleeve to blow air onto the blank during the blowing process. At other times, the blow needle will retract into the protective sleeve, which greatly reduces the damage rate of the blow needle.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. A cooling mechanism for the lower blow support material of a blow molding machine, characterized in that, include: The base plate is mounted on the blow molding machine and located below the mold closing mechanism of the blow molding machine; A support frame is installed directly above the base plate. The support frame includes a mounting plate and a movable plate located below the mounting plate. Both the mounting plate and the movable plate are parallel to the base plate. A blow needle assembly is installed in the middle of the mounting plate. The blow needle assembly includes a protective sleeve fixed to the mounting plate, a blow needle passing through the protective sleeve, and a blow needle cylinder communicating with the blow needle gas. The blow needle has a center line extending in the vertical direction, and the blow needle and the blow needle cylinder are detachably connected. The blow needle cylinder is used to drive the blow needle to move back and forth relative to the protective sleeve along the center line and can supply gas into the blow needle. The material support assembly includes a pair of material support rods respectively arranged on the left and right sides of the blow needle. Each of the material support rods extends in the vertical direction and has a cooling channel for supplying cooling water inside. The cooling channel of each of the material support rods is connected to an external water source. and The lifting assembly is connected between the base plate and the movable plate, and is used to drive the movable plate to move in the vertical direction relative to the base plate.

2. The down-blowing material cooling mechanism according to claim 1, characterized in that, The base plate is provided with a plurality of first adjustment holes, all of which are straight slot holes, and the size of each first adjustment hole in the front-back direction is greater than its size in the left-right direction.

3. The down-blowing material cooling mechanism according to claim 1, characterized in that, The mounting plate has a second adjustment hole for the protective sleeve to pass through and a pair of third adjustment holes for the pair of support rods to pass through respectively. The second adjustment hole and the pair of third adjustment holes are straight slot holes, and the dimensions of the second adjustment hole and the pair of third adjustment holes in the left-right direction are larger than their dimensions in the front-back direction.

4. The down-blowing material cooling mechanism according to claim 1, characterized in that, The bottom of the blow needle cylinder is threaded with an air pipe connector. One end of the air pipe connector is connected to an external air source, and the other end is connected to the blow needle through the blow needle cylinder.

5. The down-blowing material cooling mechanism according to claim 1, characterized in that, The end of the blow needle is threadedly connected to the telescopic rod of the blow needle cylinder.

6. The down-blowing material cooling mechanism according to claim 1, characterized in that, Each of the aforementioned cooling channels forms an independent water inlet and outlet at the bottom of the support rod, and both the water inlet and the water outlet are connected to the external water source.

7. The down-blowing material cooling mechanism according to claim 1, characterized in that, The lifting assembly includes a hydraulic motor mounted on the base plate, a drive gear connected to the hydraulic motor, a driven gear meshing with the drive gear, and a lifting cylinder passing through the driven gear. The hydraulic motor drives the drive gear to rotate around its own axis. The outer wall of the lifting cylinder is threadedly connected to the inner wall of the driven gear, and the lifting cylinder is configured to move in the vertical direction when the driven gear rotates. The telescopic rod of the lifting cylinder is connected to the moving plate.

8. The down-blowing material cooling mechanism according to claim 7, characterized in that, A connecting cover is also installed on the base plate. The connecting cover covers the outside of the driving gear and the driven gear. The connecting cover and the base plate are respectively provided with a first through hole and a second through hole for the lifting cylinder to pass through. The first through hole and the second through hole are arranged vertically opposite each other.

9. The down-blowing material cooling mechanism according to claim 8, characterized in that, The lifting cylinder is fitted with a pair of thrust ball bearings, which are located above and below the driven gear, respectively. One of the thrust ball bearings is arranged between the driven gear and the connecting cover, and the other thrust ball bearing is arranged between the driven gear and the base plate.

10. The down-blowing material cooling mechanism according to claim 7, characterized in that, Multiple guide components are connected between the moving plate and the base plate. The multiple guide components are arranged on the outside of the lifting component from the left and right. Each guide component includes a straight sleeve bearing installed on the base plate and a guide post passing through the straight sleeve bearing. Each guide post extends in the vertical direction, and the top of each guide post is connected to the moving plate.

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