Hollow bottle blowing machine with convenient mold replacement function

Abstract

The utility model relates to a hollow bottle blowing machine with a convenient mold replacement function, and belongs to the technical field of hollow bottle blowing machines. Comprising a base, and a blank supply assembly is arranged in the middle above the base. According to the utility model, the fixing assembly is arranged, so that the mold is preliminarily fixed. And when an old mold is disassembled, the two groups of limiting blocks can be separated from the limiting grooves only by pulling the movable rod backwards, so that the connection between the supporting pin rod and the mold is released. When a new mold is installed, the limiting ring hole in the rear side of the mold only needs to be aligned with the supporting pin rod, then the mold is pushed backwards, the mold can be preliminarily fixed through the mold fixing base, and the disassembly and assembly mode is simple and convenient. And by arranging the first clamping assembly and the second clamping assembly, the left side, the right side, the upper side and the lower side of the mold are clamped and fixed, so that the mold is more stable. And the fitting state of the clamping plate and the mold is inducted through the induction piece, and the driving piece is automatically controlled to stop running, so that self-adaptive adjustment is achieved, and the device adapts to molds of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of hollow blow molding machine technology, and in particular to a convenient mold-changing hollow blow molding machine. Background Art

[0002] Hollow blow molding machines are high-efficiency equipment specifically designed for producing various types of plastic containers. They are widely used in multiple industries, especially in the beverage, cosmetics, pharmaceutical, and food sectors, where they play a crucial role in production. Their working principle involves first heating a preformed plastic material (i.e., a preform) to a certain temperature to soften it, and then blowing it through stretching and air blowing to shape it into containers of the desired form and size, such as bottles and cans.

[0003] Existing hollow blow molding machines use a conventional bolt and nut fixing method to connect the mold and mold holder. This makes mold replacement cumbersome, requiring the bolts and nuts to be unscrewed before replacing and fixing the mold. Secondly, existing mold holders can only accommodate molds of the same size. When the replacement mold differs from the original, a lengthy process is required to replace the mold holder, followed by repositioning and adjusting the mold and mold holder, increasing downtime and reducing production efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a convenient mold-changing hollow blow molding machine.

[0005] The technical solution of this utility model is as follows:

[0006] A convenient mold-changing hollow blow molding machine includes a base. A preform feeding assembly is located at the center of the upper part of the base. Blow molding assemblies are symmetrically arranged on both sides of the upper part of the base. Two movable bases are slidably mounted on the upper surface of the base. Two mold fixing seats are symmetrically arranged on the upper surface of the movable bases. A central hole is formed through the center of the side of each mold fixing seat. A mold is detachably fitted to the front side of each mold fixing seat, and the two are initially fixed together by a fixing assembly. The fixing assembly includes a support pin, which is fixedly connected inside the central hole. A circular groove is formed at the center of the rear side of the mold. An insertion hole for accommodating the head of the support pin is formed in the center of the circular groove. A movable hole is formed inside the support pin, penetrating the tail of the support pin. A movable rod is slidably connected inside the movable hole. Movable grooves are formed on both the upper and lower surfaces of the support pin. Limiting blocks are slidably connected inside the movable grooves. Limiting grooves for accommodating the limiting blocks are formed on the upper and lower surfaces of the insertion hole. The two movable grooves penetrate the front end of the movable hole. A limiting rod is threaded inside the circular groove. The limiting ring of the limiting block slides out of the limiting groove. When the movable rod moves backward, the two limiting blocks slide into the movable groove to disengage from it. When the movable rod moves forward, the two limiting blocks slide out of the movable groove to enter it. The front end of the movable rod abuts against the front end face of the movable hole under the elastic action of spring one. The upper surface of the limiting block is inclined towards the front. A rear cover is detachably fixed to the rear side of the mold fixing base. The rear end of the movable rod passes through the rear cover. The mold fixing base is connected to a clamping assembly for clamping the left and right sides of the mold and a clamping assembly for clamping the upper part of the mold. The second clamping assembly on the lower side includes two clamping plates clamping the left and right sides of the mold. Two support rods are fixedly connected to the side of the clamping plate away from the mold. A through groove for the support rods to slide laterally is opened on the mold fixing seat. The rear ends of the two support rods are fixedly connected to moving rods. The two moving rods are synchronously brought closer or moved away by a driving component. One of the clamping plates is connected to a sensor for sensing the contact state between the clamping plate and the mold. After the sensor senses that the clamping plate is in contact with the mold, it controls the driving component to stop running through the control terminal.

[0007] Optionally, four sets of positioning strips are fixedly connected to the front side of the mold fixing base. The four sets of positioning strips are located on the left, right and upper and lower sides of the central hole, respectively. The rear side of the mold is provided with four sets of positioning grooves that cooperate with the positioning strips.

[0008] Optionally, the upper and lower surfaces of the front end of the movable rod are symmetrically fixed with ear seats one, a connecting rod is hinged to the inner side of the ear seat one, and ear seat two is hinged to the end of the connecting rod away from ear seat one. Ear seat two is fixedly connected to the limiting block. Guide grooves are provided on both sides of the movable groove, and guide blocks are symmetrically fixed on both sides of ear seat two. The guide blocks are slidably connected inside the guide grooves.

[0009] Optionally, a cross handle is fixedly connected to the rear end of the movable rod.

[0010] Optionally, the rear end of the support pin is fixedly connected to a hollow connecting cylinder, and a through hole for accommodating the connecting cylinder is provided on the rear cover. The rear end of the movable rod passes through the connecting cylinder and extends to the rear of the connecting cylinder. A movable plate is fixedly sleeved on the outer side of the movable rod. The movable plate is slidably connected to the inside of the connecting cylinder. The rear end of the first spring is fixedly connected to the rear side wall of the inner side of the connecting cylinder. The front end of the first spring is fixedly connected to the rear side of the movable plate. The first spring is sleeved on the outer side of the movable rod. When the movable rod moves backward, the first spring is compressed.

[0011] Optionally, an extension plate is fixedly connected to one side of the movable plate. The extension plate is slidably connected inside the connecting cylinder. A threaded hole is provided through the rear side wall of the connecting cylinder and directly behind the extension plate. A fixing bolt for restricting the movement of the extension plate is threaded inside the threaded hole.

[0012] Optionally, each of the four rear corners of the mold fixing base is fixedly connected with a connecting post, and the rear cover is fixed to the connecting post with bolts.

[0013] Optionally, the driving component includes an upper rack, a lower rack, and a gear. The upper rack and lower rack mesh with the upper and lower sides of the gear, respectively. The gear is movably sleeved on the outer rear end of the support pin and rotatably connected to it. An upper slide rail that slides in cooperation with the upper rack is fixedly connected to the rear side of the mold fixing seat above the central hole. A lower slide rail that slides in cooperation with the lower rack is fixedly connected to the rear side of the mold fixing seat below the central hole. The upper rack is fixedly connected to one of the moving rods, and the lower rack is fixedly connected to the other moving rod. An electric push rod for driving one of the moving rods to move is fixedly connected to the rear side of the mold fixing seat. When the electric push rod extends, the two sets of moving rods move away from each other.

[0014] Optionally, the sensing element includes a movable block and a sensor. One of the clamping plates has a side hole through its center. The movable block is slidably connected inside the side hole. A side seat is fixedly connected to the side of the clamping plate away from the mold. Multiple sets of springs are fixedly connected inside the side seat. One end of the spring is fixedly connected to the inner side wall of the side seat, and the other end of the spring is fixedly connected to the side of the movable block away from the mold. A sensor is fixedly connected to the side seat. When the side of the movable block near the mold is aligned with the side of the clamping plate near the mold, the movable block will trigger the sensor and make it receive a signal. After receiving the positioning signal of the movable block, the sensor controls the electric push rod to stop running through the control terminal.

[0015] Optionally, the sensor may be a contact sensor.

[0016] All of the above optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the combined structure.

[0017] The beneficial effects of this utility model through the above solution are as follows:

[0018] 1. This utility model achieves initial mold fixation by setting up a fixing component. When disassembling the old mold, simply pull the movable rod backward, and the two sets of limiting blocks will disengage from the limiting groove, thereby releasing the connection between the support pin and the mold. When installing the new mold, simply align the limiting ring hole on the rear side of the mold with the support pin, and then push the mold backward, so that the mold fixing seat fits against the mold. During this process, the two sets of limiting blocks will automatically enter the limiting groove, thereby achieving initial fixation of the mold by the mold fixing seat. The disassembly and assembly method is simple and convenient, greatly reducing manual operation time and production downtime, and significantly improving production efficiency. Secondly, since the support pin and the insertion hole are located at the center of the mold fixing seat and the mold respectively, the fixing is not limited by the size of the outer perimeter of the mold, thus increasing the range of mold sizes that can be fixed.

[0019] 2. By setting up clamping components one and two, the left and right sides and top and bottom sides of the mold are clamped and fixed, making the mold more stable and ensuring that the mold will not shift or shake during processing or operation. Furthermore, by sensing the contact state between the clamping plates and the mold, the system automatically controls the stopping of the drive components, thereby achieving adaptive adjustment to accommodate molds of different sizes.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall appearance structure of the convenient mold replacement hollow blow molding machine provided by this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the mold fixing base, mold, back cover, clamping component one and clamping component two in this utility model;

[0023] Figure 3 for Figure 2 Top view sectional view;

[0024] Figure 4 for Figure 2 Side view sectional view;

[0025] Figure 5 for Figure 2 A schematic diagram of the decomposed structure;

[0026] Figure 6 This is a schematic diagram of the structure of the mold fixing base and the fixing component in this utility model.

[0027] Figure 7 This is an exploded structural diagram of the mold fixing base and fixing components in this utility model;

[0028] Figure 8 This is a schematic diagram of the mold structure in this utility model;

[0029] Figure 9 This is an exploded structural diagram of the fixing component in this utility model;

[0030] Figure 10 This is an exploded structural diagram of the mold fixing seat and the rear cover in this utility model;

[0031] Figure 11 This is an exploded structural diagram of the mold fixing base, clamping component one, and clamping component two in this utility model;

[0032] Figure 12 This is an exploded structural diagram of the sensing element in this utility model.

[0033] The diagram labels are as follows: 1. Base; 2. Preform feeding assembly; 3. Blow molding assembly; 4. Movable base; 5. Mold fixing seat; 51. Center hole; 52. Positioning strip; 53. Through groove; 54. Connecting column; 6. Mold; 61. Circular groove; 62. Insertion hole; 63. Limiting groove; 64. Limiting ring; 65. Positioning groove; 7. Fixing assembly; 71. Support pin; 711. Movable hole; 712. Movable groove; 7121. Guide groove; 72. Movable rod; 721. Ear seat one; 722. Connecting rod; 723. Ear seat two; 7231. Guide block; 724. Limiting block; 725. Cross 73. Handle; 74. Connecting cylinder; 75. Threaded hole; 76. Movable plate; 77. Extension plate; 78. Spring 1; 79. Fixing bolt; 80. Rear cover; 81. Through hole; 91. Clamping assembly 1; 92. Clamping plate; 93. Side hole; 94. Support rod; 95. Moving rod; 96. Driving component; 97. Upper rack; 98.11. Upper slide rail; 99.2. Lower rack; 99.21. Lower slide rail; 90. Gear; 91. Electric push rod; 92. Sensing component; 93. Movable block; 94. Side seat; 95. Spring 2; 95. Sensor; 10. Clamping assembly 2. DETAILED DESCRIPTION

[0034] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0035] Please see Figure 1-12 This utility model provides a convenient mold-changing hollow blow molding machine, including a base 1, a preform feeding assembly 2 at the top center of the base 1, blow molding assemblies 3 symmetrically arranged on both sides of the top of the base 1, two movable bases 4 slidably arranged on the upper surface of the base 1, and two mold fixing seats 5 symmetrically arranged on the upper surface of the movable bases 4. A central hole 51 is provided through the center of the side of the mold fixing seat 5. A mold 6 is detachably attached to the front side of the mold fixing seat 5 and the two are initially fixed by a fixing assembly 7. The fixing assembly 7 includes a support pin 71, which is fixedly connected to the inside of the central hole 51. The rear center of the mold 6 is located at... A circular groove 61 is provided, with a central insertion hole 62 for accommodating the head of a support pin 71. A movable hole 711 is provided inside the support pin 71, extending through its tail. A movable rod 72 is slidably connected inside the movable hole 711. Movable grooves 712 are provided on both the upper and lower surfaces of the support pin 71, with limiting blocks 724 slidably connected inside each groove. Limiting grooves 63 for accommodating the limiting blocks 724 are provided on the upper and lower surfaces of the insertion hole 62. The two movable grooves 712 penetrate the front end of the movable hole 711. A threaded connection is provided inside the circular groove 61 for limiting the limiting blocks 724. 4. When the limiting ring 64 slides out of the limiting groove 63, the two limiting blocks 724 slide into the movable groove 712 and thus disengage from the limiting groove 63 when the movable rod 72 moves backward. When the movable rod 72 moves forward, the two limiting blocks 724 slide out of the movable groove 712 and thus enter the limiting groove 63. The front end of the movable rod 72 abuts against the front end face of the movable hole 711 under the elastic action of the spring 75. The upper surface of the limiting block 724 is inclined to the front side. The rear side of the mold fixing base 5 is detachably fixedly connected to the rear cover 8. The rear end of the movable rod 72 passes through the rear cover 8. The mold fixing base 5 is connected to the clamping assembly 9 for clamping the left and right sides of the mold 6 and the clamping assembly 9 for clamping the mold 6. The upper and lower clamping components 2 10 and clamping components 1 9 include two clamping plates 91 clamping the left and right sides of the mold 6. Two support rods 92 are fixedly connected to the side of the clamping plate 91 away from the mold 6. A through groove 53 for the support rods 92 to slide laterally is opened on the mold fixing seat 5. The rear ends of the two support rods 92 are fixedly connected to moving rods 93. The two moving rods 93 are synchronously brought closer or moved away through the driving component 94. One of the clamping plates 91 is connected to a sensor 95 for sensing the state of the clamping plate 91 and the mold 6. After the sensor 95 senses that the clamping plate 91 and the mold 6 are in contact, it controls the driving component 94 to stop running through the control terminal.

[0036] This invention achieves initial fixation of the mold 6 by setting a fixing component 7. When disassembling the old mold 6, simply pull the movable rod 72 backward, and the two sets of limiting blocks 724 will disengage from the limiting groove 63, thereby releasing the connection between the support pin 71 and the mold 6. When installing the new mold 6, simply align the hole of the limiting ring 64 on the rear side of the mold 6 with the support pin 71, and then push the mold 6 backward, so that the mold fixing seat 5 fits against the mold 6. During this process, the two sets of limiting blocks 724 will automatically enter the limiting groove 63, thereby achieving initial fixation of the mold 6 by the mold fixing seat 5. The disassembly and assembly method is simple and convenient, greatly reducing manual operation time and production downtime, and significantly improving production efficiency. Secondly, since the support pin 71 and the insertion hole 62 are located at the center of the mold fixing seat 5 and the mold 6 respectively, the fixation is not limited by the size of the outer perimeter of the mold 6, thereby increasing the range of sizes of the mold 6 that can be fixed.

[0037] By setting clamping components 1 (9) and 2 (10), the left and right sides and top and bottom sides of the mold 6 are clamped and fixed, making the mold 6 more stable and ensuring that the mold 6 will not shift or shake during processing or operation. Furthermore, the sensor 95 senses the contact state between the clamping plate 91 and the mold 6 and automatically controls the drive component 94 to stop running, thereby achieving adaptive adjustment to adapt to molds 6 of different sizes. Specifically, after the mold fixing seat 5 and the mold 6 are initially fixed together by the fixing component 7, the drive component 94 drives the two sets of moving rods 93 to move closer together. The two sets of moving rods 93 respectively drive the left and right clamping plates 91 to move closer together through the corresponding support rods 92. When the clamping plate 91 is in contact with the movable block 951, the sensor 95 controls the drive component 94 to stop running through the control terminal, ensuring that the clamping force on both sides of the mold 6 reaches the predetermined requirements, and automatically adapting when the size of the mold 6 changes, thereby ensuring the efficiency and accuracy of the clamping process and achieving versatility and ease of operation for different molds 6.

[0038] Specifically, when installing the new mold 6, simply align the hole of the limiting ring 64 on the rear side of the mold 6 with the support pin 71, and then push the mold 6 backward. During this process, the limiting ring 64 will slide along the inclined surface of the limiting block 724 and press the limiting block 724 into the movable groove 712, at which time the spring 75 is gradually compressed. As the mold 6 is pushed, when the limiting block 724 is fully inserted into the insertion hole 62 and disengages from the limiting ring 64, the spring 75 returns to its original shape, and under the elastic action of the spring 75, it will push the movable rod 72 forward, thereby elastically pressing the two sets of limiting blocks 724 into the inner side of the limiting groove 63, thus achieving self-locking between the mold 6 and the support pin 71.

[0039] It should be noted that the structure and principle of clamping component 9 and clamping component 10 are the same, and will not be described again in this article.

[0040] Furthermore, four sets of positioning strips 52 are fixedly connected to the front side of the mold fixing base 5. The four sets of positioning strips 52 are located on the left, right and upper and lower sides of the central hole 51, respectively. Four sets of positioning grooves 65 that cooperate with the positioning strips 52 are opened on the rear side of the mold 6.

[0041] Specifically, when installing mold 6, simply align the positioning groove 65 on the rear side of mold 6 with the positioning strip 52 on mold fixing base 5, and easily insert mold 6. Through this simple docking method, mold 6 and mold fixing base 5 can be quickly and accurately positioned, greatly improving installation efficiency.

[0042] Furthermore, ear seats 721 are symmetrically fixed on the upper and lower surfaces of the front end of the movable rod 72. A connecting rod 722 is hinged to the inner side of the ear seat 721. An ear seat 723 is hinged to the end of the connecting rod 722 away from the ear seat 721. The ear seat 723 is fixedly connected to the limiting block 724. Guide grooves 7121 are provided on both sides of the movable groove 712. Guide blocks 7231 are symmetrically fixed on both sides of the ear seat 723. The guide blocks 7231 are slidably connected inside the guide grooves 7121.

[0043] Specifically, when disassembling the old mold 6, the movable rod 72 needs to be pulled backward. The movable rod 72 causes the first ear seat 721 to slide backward. At this time, the first ear seat 721 drives the second ear seat 723 to slide downward along the movable groove 712 through the connecting rod 722, thereby causing the limiting block 724 to disengage from the limiting groove 63 and slide into the movable groove 712. When installing the new mold 6, as the limiting ring 64 is pushed in, the limiting block 724 will be squeezed into the movable groove 712. When the limiting block 724 slides relative to the movable groove 712, it is restricted by the sliding of the guide block 7231 and the guide groove 7121, so that the second ear seat 723 and the limiting block 724 can only slide vertically along the movable groove 712, thereby avoiding any horizontal displacement.

[0044] Furthermore, a cross handle 725 is fixedly connected to the rear end of the movable lever 72.

[0045] Specifically, the operator can conveniently manipulate the movable lever 72 to move backward using the cross handle 725, thereby cooperating with the mold 6 for quick disassembly.

[0046] Furthermore, a hollow connecting cylinder 73 is fixedly connected to the rear end of the support pin 71. A through hole 81 for accommodating the connecting cylinder 73 is provided on the rear cover 8. The rear end of the movable rod 72 passes through the connecting cylinder 73 and extends to the rear of the connecting cylinder 73. A movable plate 74 is fixedly sleeved on the outer side of the movable rod 72. The movable plate 74 is slidably connected to the inside of the connecting cylinder 73. The rear end of the spring 75 is fixedly connected to the rear side wall of the inside of the connecting cylinder 73. The front end of the spring 75 is fixedly connected to the rear side of the movable plate 74. The spring 75 is sleeved on the outer side of the movable rod 72. When the movable rod 72 moves backward, the spring 75 is compressed.

[0047] Specifically, when disassembling the old mold 6, the movable rod 72 needs to be pulled backward. The movable rod 72 drives the movable plate 74 to slide backward, thereby compressing the spring 75. When installing the new mold 6, as the limiting ring 64 is pushed in, the limiting block 724 will slide into the movable groove 712 on its own. At this time, the movable rod 72 will slide backward and compress the spring 75 through the movable plate 74. After the limiting block 724 is fully inserted into the limiting groove 63, the spring 75 returns to its original shape and pushes the movable rod 72 forward by elastically pressing the movable plate 74, thereby indirectly pushing the limiting block 724 into the limiting groove 63, thus achieving the initial fixation of the mold 6.

[0048] Furthermore, an extension plate 741 is fixedly connected to one side of the movable plate 74. The extension plate 741 is slidably connected inside the connecting cylinder 73. A threaded hole 731 is provided through the rear side wall of the connecting cylinder 73 and directly behind the extension plate 741. A fixing bolt 76 for restricting the movement of the extension plate 741 is threaded inside the threaded hole 731.

[0049] Specifically, the movable plate 74 drives the extension plate 741 to move synchronously. During the disassembly and assembly process, the fixing bolts 76 need to be tightened to a certain length in advance to ensure that the extension plate 741 has enough room to move and slide freely, so as to disassemble or replace the mold 6. After the new mold 6 is installed, the operator can manually tighten the fixing bolts 76 and make their ends abut against the extension plate 741. At this time, the extension plate 741 and the movable plate 74 cannot move, thereby indirectly locking the positions of the movable rod 72 and the limit block 724, thus ensuring the connection and fixation between the mold fixing seat 5 and the mold 6.

[0050] Furthermore, each of the four rear corners of the mold fixing base 5 is fixedly connected with a connecting post 54, and the rear cover 8 is fixed to the connecting post 54 with bolts.

[0051] Specifically, the mold fixing base 5 and the rear cover 8 are fixed with bolts, which facilitates subsequent disassembly and maintenance.

[0052] Furthermore, the driving component 94 includes an upper rack 941, a lower rack 942, and a gear 943. The upper rack 941 and the lower rack 942 are respectively meshed on the upper and lower sides of the gear 943. The gear 943 is movably sleeved on the outer rear end of the support pin 71 and the two are rotatably connected. An upper slide rail 9411 that slides and cooperates with the upper rack 941 is fixedly connected to the rear side of the mold fixing seat 5 and above the center hole 51. A lower slide rail 9421 that slides and cooperates with the lower rack 942 is fixedly connected to the rear side of the mold fixing seat 5 and below the center hole 51. The upper rack 941 is fixedly connected to one of the moving rods 93, and the lower rack 942 is fixedly connected to the other moving rod 93. An electric push rod 944 for driving one of the moving rods 93 to move is fixedly connected to the rear side of the mold fixing seat 5. When the electric push rod 944 extends, the two sets of moving rods 93 move away from each other.

[0053] Specifically, when it is necessary to clamp and fix the mold 6, the electric push rod 944 is shortened by controlling the control terminal, thereby driving one of the moving rods 93, the support rod 92, and the clamping plate 91 to move towards the mold 6. During this process, one of the moving rods 93 will drive the upper rack 941 to move towards the other moving rod 93. Under the meshing action of the gear 943, the lower rack 942 and the upper rack 941 will respectively drive the moving rods 93 connected to them to move closer to each other, thereby achieving the clamping of the mold 6.

[0054] Furthermore, the sensing element 95 includes a movable block 951 and a sensor 954. A side hole 911 is provided through the center of a clamping plate 91. The movable block 951 is slidably connected inside the side hole 911. A side seat 952 is fixedly connected to the side of the clamping plate 91 away from the mold 6. Multiple sets of springs 953 are fixedly connected inside the side seat 952. One end of the spring 953 is fixedly connected to the inner side wall of the side seat 952, and the other end of the spring 953 is fixedly connected to the side of the movable block 951 away from the mold 6. A sensor 954 is fixedly connected to the side seat 952. When the side of the movable block 951 near the mold 6 is aligned with the side of the clamping plate 91 near the mold 6, the movable block 951 will trigger the sensor 954 and make it receive a signal. After receiving the positioning signal of the movable block 951, the sensor 954 controls the electric push rod 944 to stop running through the control terminal.

[0055] Specifically, when the mold 6 is not clamped, the movable block 951, under the elastic action of the second spring 953, will push out the side hole 911, preparing for the subsequent clamping of the mold 6 (e.g. Figure 5(As shown). When clamping mold 6 is required, clamping plate 91 begins to move towards mold 6, and movable block 951 is gradually squeezed into side hole 911 until the side of movable block 951 near mold 6 is flush with the side of clamping plate 91 near mold 6. At this time, movable block 951 triggers sensor 954. After receiving the positioning signal of movable block 951, sensor 954 controls electric push rod 944 to stop extending and retracting, thus completing the clamping operation. This structure allows clamping plate 91 to flexibly adapt to molds 6 of different sizes without requiring any prior adjustment to the extension and retraction stroke of electric push rod 944. Through sensing by sensor 95, the extension and retraction length of electric push rod 944 can be automatically adjusted to ensure the accuracy and efficiency of the clamping process, greatly improving installation and clamping efficiency and reducing the need for manual adjustment.

[0056] Furthermore, sensor 954 is a contact sensor.

[0057] Specifically, sensor 954 is a contact sensor, which works by triggering a signal through direct contact between the movable block 951 and the contact sensor's contact tip. When the movable block 951 contacts the contact sensor's contact tip, the contact sensor receives a clear positioning signal. This contact sensor design makes the sensing process more stable and reliable. Compared to non-contact sensors, it effectively reduces external environmental interference and ensures the accuracy of signal transmission.

[0058] It should be noted that: 1. This utility model only improves the connection and fixing method between the mold fixing base 5 and the mold 6, while the base 1, blank feeding assembly 2, blow molding assembly 3 and movable base 4 mentioned above all adopt existing technologies in this field. 2. All electrical devices mentioned above are electrically connected to the control terminal.

[0059] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A convenient mold-changing hollow blow molding machine, comprising a base (1), wherein a preform feeding assembly (2) is provided at the center of the upper part of the base (1), blow molding assemblies (3) are symmetrically arranged on both sides of the upper part of the base (1), and two movable bases (4) are slidably arranged on the upper surface of the base (1), wherein two mold fixing seats (5) are symmetrically arranged on the upper surface of the movable bases (4), characterized in that: A central hole (51) is provided through the center of the side of the mold fixing base (5). The mold (6) is detachably attached to the front of the mold fixing base (5) and the two are initially fixed together by a fixing component (7). The fixing component (7) includes a support pin (71), which is fixedly connected inside the central hole (51). A circular groove (61) is provided at the center of the rear side of the mold (6). An insertion hole (62) for accommodating the head of the support pin (71) is provided in the center of the circular groove (61). A movable hole (711) is provided inside the support pin (71), and the movable hole (711) penetrates the tail of the support pin (71). A movable rod (72) is slidably connected inside the hole (711). Movable grooves (712) are provided on both the upper and lower surfaces of the support pin (71). Limiting blocks (724) are slidably connected inside the movable grooves (712). Limiting grooves (63) for accommodating the limiting blocks (724) are provided on the upper and lower surfaces of the insertion hole (62). The two movable grooves (712) penetrate the front end of the movable hole (711). A limiting ring (64) is threaded inside the circular groove (61) to restrict the limiting blocks (724) from sliding out of the limiting groove (63). When the movable rod (72) moves backward, the two limiting blocks (724) slide into the movable grooves (712) and thus disengage from the limiting grooves (63). When the movable rod (72) moves forward, the two limiting blocks (724) slide out of the movable groove (712) and enter the limiting groove (63). The front end of the movable rod (72) abuts against the front end face of the movable hole (711) under the elastic action of the spring (75). The upper surface of the limiting block (724) is inclined to the front side. The rear side of the mold fixing seat (5) is detachably fixed with a rear cover (8). The rear end of the movable rod (72) passes through the rear cover (8). The mold fixing seat (5) is connected with a clamping component one (9) for clamping the left and right sides of the mold (6) and a clamping component two (10) for clamping the upper and lower sides of the mold (6). The clamping component one (9) includes two clamping components that clamp the mold. The mold (6) has clamping plates (91) on both sides. Two support rods (92) are fixedly connected to the side of the clamping plate (91) away from the mold (6). The mold fixing seat (5) has a through groove (53) for the support rods (92) to slide laterally. The rear ends of the two support rods (92) are fixedly connected to moving rods (93). The two moving rods (93) are synchronously brought closer or moved away by the driving component (94). One of the clamping plates (91) is connected to a sensor (95) for sensing the contact state between the clamping plate (91) and the mold (6). After the sensor (95) senses that the clamping plate (91) and the mold (6) are in contact, it controls the driving component (94) to stop running through the control terminal.

2. The convenient mold-changing hollow blow molding machine according to claim 1, characterized in that, The front side of the mold fixing base (5) is fixedly connected with four sets of positioning strips (52). The four sets of positioning strips (52) are located on the left, right and upper and lower sides of the central hole (51), respectively. The rear side of the mold (6) is provided with four sets of positioning grooves (65) that cooperate with the positioning strips (52).

3. The convenient mold-changing hollow blow molding machine according to claim 1, characterized in that, The front end of the movable rod (72) is symmetrically fixed with ear seat 1 (721) on the upper and lower surfaces. A connecting rod (722) is hinged to the inner side of ear seat 1 (721). Ear seat 2 (723) is hinged to the end of the connecting rod (722) away from ear seat 1 (721). Ear seat 2 (723) is fixedly connected to the limiting block (724). Guide grooves (7121) are provided on both sides of the movable groove (7121). Guide blocks (7231) are symmetrically fixed on both sides of ear seat 2 (723). The guide blocks (7231) are slidably connected inside the guide grooves (7121).

4. A convenient mold-changing hollow blow molding machine according to claim 3, characterized in that, The rear end of the movable rod (72) is fixedly connected to a cross handle (725).

5. A convenient mold-changing hollow blow molding machine according to claim 1, 3, or 4, characterized in that, The rear end of the support pin (71) is fixedly connected to a hollow connecting cylinder (73). The rear cover (8) has a through hole (81) for accommodating the connecting cylinder (73). The rear end of the movable rod (72) passes through the connecting cylinder (73) and extends to the rear of the connecting cylinder (73). A movable plate (74) is fixedly sleeved on the outer side of the movable rod (72). The movable plate (74) is slidably connected to the inside of the connecting cylinder (73). The rear end of the first spring (75) is fixedly connected to the rear side wall of the inner side of the connecting cylinder (73). The front end of the first spring (75) is fixedly connected to the rear side of the movable plate (74). The first spring (75) is sleeved on the outer side of the movable rod (72). When the movable rod (72) moves backward, the first spring (75) is compressed.

6. A convenient mold-changing hollow blow molding machine according to claim 5, characterized in that, An extension plate (741) is fixedly connected to one side of the movable plate (74). The extension plate (741) is slidably connected inside the connecting cylinder (73). A threaded hole (731) is provided through the rear side wall of the connecting cylinder (73) and located directly behind the extension plate (741). A fixing bolt (76) for restricting the movement of the extension plate (741) is threaded inside the threaded hole (731).

7. A convenient mold-changing hollow blow molding machine according to claim 1, characterized in that, The mold fixing base (5) is fixedly connected to four connecting columns (54) at the rear corners, and the rear cover (8) is fixed to the connecting columns (54) with bolts.

8. A convenient mold-changing hollow blow molding machine according to claim 1, characterized in that, The driving component (94) includes an upper rack (941), a lower rack (942), and a gear (943). The upper rack (941) and the lower rack (942) mesh with the upper and lower sides of the gear (943), respectively. The gear (943) is movably sleeved on the outer rear end of the support pin (71) and the two are rotatably connected. An upper slide rail (9411) that slides and cooperates with the upper rack (941) is fixedly connected to the rear side of the mold fixing seat (5) and above the central hole (51). A lower slide rail (9421) that slides in cooperation with the lower rack (942) is fixedly connected below the central hole (51). The upper rack (941) is fixedly connected to one of the moving rods (93), and the lower rack (942) is fixedly connected to the other moving rod (93). An electric push rod (944) for driving one of the moving rods (93) to move is fixedly connected to the rear side of the mold fixing seat (5). When the electric push rod (944) extends, the two sets of moving rods (93) move away from each other.

9. A convenient mold-changing hollow blow molding machine according to claim 8, characterized in that, The sensing element (95) includes a movable block (951) and a sensor (954). A side hole (911) is formed through the center of one of the clamping plates (91). The movable block (951) is slidably connected inside the side hole (911). A side seat (952) is fixedly connected to the side of the clamping plate (91) away from the mold (6). Multiple sets of springs (953) are fixedly connected inside the side seat (952). One end of each spring (953) is fixedly connected to the inner wall of the side seat (952). The other end of the second (953) is fixedly connected to the side of the movable block (951) away from the mold (6). A sensor (954) is fixedly connected to the side seat (952). When the side of the movable block (951) close to the mold (6) is aligned with the side of the clamping plate (91) close to the mold (6), the movable block (951) will trigger the sensor (954) and make it receive a signal. After receiving the positioning signal of the movable block (951), the sensor (954) controls the electric push rod (944) to stop running through the control terminal.

10. A convenient mold-changing hollow blow molding machine according to claim 9, characterized in that, The sensor (954) is a contact sensor.

Images