A plastic bucket blow molding machine with easy-to-change blow molding head

Abstract

This utility model relates to the technical field of blow molding machines, and provides a plastic bucket blow molding machine with an easy-to-change blow molding head. It includes: a base and a support frame, the support frame being fixed on the base, a top box being fixed on the support frame, a blow molding assembly being mounted on the top box, upright plates being fixed to both ends of the base surface, and a molding assembly being mounted on the upright plates. The blow molding assembly includes a feed inlet pipe fixed to the side surface of the top box and connected to the interior of the top box. A blow molding tube is rotatably connected inside the top box, and an inner blow molding head is inserted into the bottom of the top box. The inner blow molding head is connected to the lower end of the blow molding tube by a threaded connection. This technical solution solves the problem in the prior art where changing blow molding heads of different specifications requires disassembling the fixing bolts one by one and separating multiple sets of pipe interfaces, resulting in a cumbersome operation process, excessive time consumption per change, and serious impact on the continuous operation efficiency of the production line.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of blow molding machines, and more specifically, to a blow molding machine for plastic buckets that facilitates the replacement of blow molding heads. Background Technology

[0002] In the mass production of plastic buckets, the blow molding head, as the core component of the blow molding machine, directly determines the molding precision and specifications of the product. A blow molding machine is a specialized piece of machinery that produces hollow plastic products through a blow molding process. Its core principle is to place a molten plastic preform in a mold, inflate it with compressed air, and then cool and demold it. Currently, traditional plastic bucket blow molding machines often use an integrated fixed structure for the blow molding head and machine body, rigidly connected by multiple sets of bolts, and the connection points are often accompanied by complex piping interfaces (such as air ducts, hydraulic pipes, etc.). This connection method has revealed significant drawbacks in actual production: First, when changing blow molding heads of different specifications, it is necessary to disassemble the fixing bolts one by one and separate multiple sets of pipe interfaces, which is cumbersome and takes too long for each replacement, seriously affecting the continuous operation efficiency of the production line; Second, during frequent disassembly, the bolts and interfaces are prone to gaps due to mechanical wear, resulting in a decrease in airtightness, which in turn affects the stability of the blow molding pressure and increases the product defect rate; Third, in the traditional structure, the blow molding head and drive components are highly integrated, and the entire structure needs to be disassembled for daily maintenance, which not only increases the difficulty of maintenance, but may also cause damage to related components due to improper operation. With the growing demand for multi-specification and small-batch customization in the plastic bucket market, the shortcomings of traditional blow molding machines in terms of replacement efficiency and maintenance convenience have become increasingly apparent, creating an urgent need for a new structural design that enables rapid replacement and maintenance of the blow molding head. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a plastic bucket blow molding machine that facilitates the replacement of blow molding heads. This solves the technical problem in the prior art that when replacing blow molding heads of different specifications, it is necessary to disassemble the fixing bolts one by one and separate multiple sets of pipeline interfaces, which is cumbersome and takes too long for a single replacement, seriously affecting the continuous operation efficiency of the production line.

[0004] According to one aspect, at least one embodiment of this disclosure provides a plastic bucket blow molding machine that facilitates the replacement of the blow molding head, comprising: Equipment base and upright frame, wherein the upright frame is fixed on the equipment base; The top box and the blow molding assembly are provided, wherein the top box is fixed on the upright and the blow molding assembly is disposed on the top box; A pair of upright plates and a molding assembly, wherein the upright plates are fixed to both ends of the surface of the equipment base, and the molding assembly is disposed on the upright plates; The blow molding assembly includes a feed inlet pipe fixed to the side surface of the top box and connected to the inside of the top box. A blow molding tube is rotatably connected inside the top box, and an inner blow molding head is inserted into the bottom of the top box. The inner blow molding head is connected to the lower end of the blow molding tube by a threaded connection.

[0005] As a further technical solution, a fixing frame is provided on the top of the top box, and a twisting layer is provided on the upper end of the blow molding tube. The twisting layer is rotatably connected to the top of the top box, and a docking air nozzle is provided inside the fixing frame.

[0006] As a further technical solution, the sealing rotating sleeve of the docking nozzle is mounted on the upper end of the blow molding tube, the bottom of the top box is provided with a docking groove, an outer blow molding head is inserted into the docking groove, and a support layer is provided around the outer surface of the outer blow molding head.

[0007] As a further technical solution, both ends of the bottom of the top box are horizontally provided with a sleeve connected by a linear drive, and the sleeve is fitted onto the bottom of the support layer.

[0008] As a further technical solution, the molding component includes a pair of slide rails, both of which are disposed on the surface of the equipment base. A molding die is slidably connected to both ends of the slide rails. A pair of cylinders are disposed on the side surface of the upright frame, and the output end of the cylinders is connected to the molding die.

[0009] As a further technical solution, the outer surface of the twisted layer has a polygonal structure around its perimeter.

[0010] As a further technical solution, a sealing protrusion is provided around the outer surface of the outer blow molding head.

[0011] As a further technical solution, the bottom surface of the support layer is an inclined structural surface.

[0012] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this disclosure, the blow molding assembly solves the problem of cumbersome replacement of traditional blow molding heads by using a threaded connection and a sleeve fixing structure. The threaded connection between the inner blow molding head and the blow molding tube facilitates quick assembly and disassembly, while the outer blow molding head is securely fixed through the cooperation of the sleeve and the support layer, eliminating the need to disassemble multiple sets of bolts and pipelines. The polygonal structure of the screw layer facilitates operation with leverage, and the sealing convex layer ensures airtightness and stable blow molding pressure. This design significantly shortens replacement time, reduces production line downtime, and improves the flexibility and efficiency of multi-specification plastic bucket production.

[0013] 2. In this disclosure, the molding component achieves precise mold opening and closing through the cooperation of a slide rail and a cylinder, solving the problem of inaccurate positioning in traditional molding structures. The cylinder drives the mold to move smoothly along the slide rail, ensuring a tight fit when closed and guaranteeing the molding accuracy of the plastic bucket. The rapid opening and closing of the mold, working in conjunction with the blow molding component, improves the continuity of the production rhythm. At the same time, the slide rail design reduces mold wear and extends its service life. This structure adapts to the rapid changeover of molds of different specifications, matching the convenience of the blow molding component, further enhancing the versatility and production efficiency of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 Appendix to this disclosure Figure 1 Enlarged view of part A in the middle; In the diagram: 1. Equipment base; 2. Stand; 3. Top box; 4. Stand plate; 5. Blow molding assembly; 5-1. Feeding pipe; 5-2. Blow molding tube; 5-3. Inner blow molding head; 5-4. Fixing frame; 5-5. Twisting layer; 5-6. Connecting nozzle; 5-7. Connecting groove; 5-8. Outer blow molding head; 5-9. Support layer; 5-10. Sleeve; 6. Molding assembly; 6-1. Slide rail; 6-2. Molding mold; 6-3. Cylinder; 7. Sealing protrusion. Detailed Implementation

[0016] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-4 As shown, it illustrates a plastic bucket blow molding machine with an easily replaceable blow molding head according to an embodiment of the present disclosure, comprising: The equipment base 1 and the upright frame 2 are fixed on the equipment base 1; The top box 3 and the blow molding assembly 5 are provided on the top box 3. A pair of upright plates 4 and a forming component 6, wherein the upright plates 4 are fixed at both ends of the surface of the equipment base 1, and the forming component 6 is disposed on the upright plates 4; The blow molding assembly 5 includes a feed inlet pipe 5-1, which is fixed to the side surface of the top box 3 and communicates with the interior of the top box 3. A blow molding tube 5-2 is rotatably fitted inside the top box 3. An inner blow molding head 5-3 is inserted into the bottom of the top box 3 and is threadedly connected to the lower end of the blow molding tube 5-2. A fixing bracket 5-4 is provided on the top of the top box 3, and a screwing layer 5-5 is provided on the upper end of the blow molding tube 5-2. 5. A rotating sleeve is connected to the top of the top box 3. A docking nozzle 5-6 is provided inside the fixing frame 5-4. The docking nozzle 5-6 is a sealing rotating sleeve on the upper end of the blow molding tube 5-2. A docking groove 5-7 is provided at the bottom of the top box 3. An outer blow molding head 5-8 is inserted into the docking groove 5-7. A support layer 5-9 is provided around the outer surface of the outer blow molding head 5-8. Both ends of the bottom of the top box 3 are horizontally provided with a sleeve 5-10 connected by a linear drive. The sleeve 5-10 is fitted at the bottom of the support layer 5-9.

[0023] In some examples, to achieve the effects of raw material conveying, blow molding, and quick replacement of the blow molding head, a blow molding assembly 5 was designed. This assembly includes a feed pipe 5-1 that connects to the inside of the top box 3, providing a conveying channel for the molten raw material. The blow molding tube 5-2 inside the top box 3 is rotatably mounted, and its lower end is screwed to the inner blow molding head 5-3 via threads, facilitating the disassembly and replacement of the inner blow molding head 5-3.

[0024] The top bracket 5-4 of the top box 3 secures the connecting air nozzle 5-6. The connecting air nozzle 5-6 is fitted with a sealing rotating sleeve on the upper end of the blow molding tube 5-2, ensuring a seal during air blowing without affecting the rotation of the blow molding tube 5-2. The screw layer 5-5 at the upper end of the blow molding tube 5-2 facilitates rotation and adjustment of the blow molding tube 5-2. The connecting groove 5-7 at the bottom of the top box 3 inserts the external blow molding head 5-8. The support layer 5-9 provides support for the external blow molding head 5-8. The linear drive sleeve 5-10 is fitted at the bottom of the support layer 5-9, enabling quick fixing and disassembly of the external blow molding head 5-8.

[0025] During operation, the raw material enters through the feeding pipe 5-1, and the blow molding pipe 5-2 transports the raw material to the inner and outer blow molding heads 5-8. Gas is introduced through the connecting nozzle 5-6 to complete the blow molding process. When changing the blow molding head, simply loosen the sleeve 5-10 to remove the outer blow molding head 5-8 and unscrew the inner blow molding head 5-3. The operation is convenient, improves the efficiency of head changing, and is suitable for the production of plastic buckets of different specifications.

[0026] like Figures 1-4 As shown in the figure, the molding component 6 in this embodiment includes a pair of slide rails 6-1, both of which are disposed on the surface of the equipment base 1. Both ends of the slide rails 6-1 are slidably connected to molding molds 6-2. A pair of cylinders 6-3 are disposed on the side surface of the upright frame, and the output end of the cylinders 6-3 is connected to the molding molds 6-2.

[0027] In some examples, to achieve the molding effect, a molding component 6 is designed. This component includes a pair of parallel slide rails 6-1 on the surface of the device base 1. The molding die 6-2 is slidably connected to both ends of the slide rails 6-1 by a slider to ensure smooth movement of the die. The cylinder 6-3 on the side surface of the upright plate 4 is fixed, and its output end is connected to the molding die 6-2, driving the die to open and close along the slide rails 6-1.

[0028] During blow molding, cylinder 6-3 pushes the two side molding dies 6-2 along slide rail 6-1 to move towards the center and close, forming the molding cavity of the plastic bucket. This cavity works in conjunction with the blow molding assembly 5 to complete the molding of the plastic bucket. After molding, cylinder 6-3 pulls the mold apart, facilitating the removal of the finished product. Slide rail 6-1 ensures precise mold movement, and cylinder 6-3 provides a stable driving force, ensuring a tight mold closure and guaranteeing the molding accuracy of the plastic bucket to meet the needs of mass production.

[0029] For example, such as Figure 4 As shown, the outer surface of the twisted layer 5-5 has a polygonal structure.

[0030] In some examples, the polygonal structure on the outer surface of the screw-on layer 5-5 is adapted to the clamping surface of tools such as wrenches. Operators can use tools to clamp the polygonal surface and easily rotate the screw-on layer 5-5, thereby rotating the blow molding tube 5-2 and enabling quick tightening or loosening of the inner blow molding head 5-3. This structure increases the contact area for force application, saves effort, and reduces slippage, improving operational efficiency when changing the blow molding head.

[0031] For example, such as Figure 1 As shown, a sealing protrusion 7 is provided around the outer surface of the outer blow molding head 5-8.

[0032] In some examples, the sealing protrusion 7 on the outer surface of the outer blow molding head 5-8 is made of an elastic material, and its shape matches the mating groove 5-7 at the bottom of the top box 3. When the outer blow molding head 5-8 is inserted into the mating groove 5-7, the sealing protrusion 7 fits tightly against the groove wall, forming a reliable sealing structure to prevent raw materials or gas from leaking from the gap during the blow molding process, ensuring stable blow molding pressure and improving the molding quality of the plastic bucket.

[0033] For example, such as Figure 3 As shown, the bottom surface of the support layer 5-9 is an inclined structural surface.

[0034] In some examples, the inclined structural surface of the bottom of the support layer 5-9 matches the inclined surface of the top of the sleeve 5-10. When the sleeve 5-10 is fitted onto the bottom of the support layer 5-9 under drive, a surface contact is formed between the inclined surfaces, increasing the fit between the two and allowing the sleeve 5-10 to more stably support the outer blow molding head 5-8, preventing the outer blow molding head 5-8 from shaking during blow molding and ensuring its docking accuracy with the top box 3.

[0035] In actual use: Fix the equipment base 1, and keep the top box 3 and the upright plate 4 on the stand 2 stable. Select the appropriate inner blow molding head 5-3 and outer blow molding head 5-8 according to the specifications of the plastic bucket. Rotate the screw layer 5-5 at the upper end of the blow molding tube 5-2. Its polygonal structure makes it easy to apply force with tools, so that the inner blow molding head 5-3 is tightly connected to the lower end of the blow molding tube 5-2 through threads. The outer blow molding head 5-8 is inserted into the docking groove 5-7 at the bottom of the top box 3. The sealing protrusion 7 fits against the groove wall to form a seal and prevent air leakage. Start the linear drive, and the sleeve 5-10 moves horizontally. Because its top is adapted to the inclined structure of the bottom surface of the support layer 5-9, it is precisely fitted into the bottom of the support layer 5-9, and the outer blow molding head 5-8 is firmly fixed. The feed docking pipe 5-1 delivers molten raw material into the top box 3. The blow molding tube 5-2 rotates to guide the raw material to the blow molding head. At the same time, gas is introduced through the docking nozzle 5-6 and injected into the cavity through the blow molding tube 5-2 and the blow molding head to complete the blow molding. The cylinder 6-3 of the molding component 6 pushes the molding mold 6-2 to slide smoothly along the slide rail 6-1 and close, forming a cavity that matches the product for molding. After completion, the cylinder pulls the mold apart, and the molded plastic bucket is removed. When replacing the blow molding head, the linear drive drives the sleeve 5-10 to move in the opposite direction and detach from the support layer 5-9, directly removing the outer blow molding head 5-8. Then, the screw layer 5-5 is rotated to separate the inner blow molding head 5-3 from the blow molding tube 5-2, thus completing the replacement.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A plastic bucket blow molding machine with an easy-to-change blow molding head, characterized in that, include: Equipment base (1) and stand (2), wherein the stand (2) is fixed on the equipment base (1); The top box (3) and the blow molding assembly (5) are provided on the top box (3), the top box (3) being fixed on the upright (2) and the blow molding assembly (5) being disposed on the top box (3); A pair of upright plates (4) and a forming component (6), wherein the upright plates (4) are fixed at both ends of the surface of the equipment base (1), and the forming component (6) is disposed on the upright plates (4); The blow molding assembly (5) includes a feed pipe (5-1), which is fixed to the side surface of the top box (3). The feed pipe (5-1) is connected to the inside of the top box (3). A blow molding tube (5-2) is rotatably connected inside the top box (3). An inner blow molding head (5-3) is inserted into the bottom of the top box (3). The inner blow molding head (5-3) is connected to the lower end of the blow molding tube (5-2) by screwing.

2. A plastic pail blow molding machine with blow molding head replacement facilitation in accordance with claim 1, wherein, The top of the top box (3) is provided with a fixing frame (5-4), the upper end of the blow molding tube (5-2) is provided with a twisting layer (5-5), the twisting layer (5-5) is rotatably connected to the top of the top box (3), and the fixing frame (5-4) is provided with a docking nozzle (5-6).

3. A plastic pail blow molding machine with blow molding head replacement facilitation in accordance with claim 2, wherein, The sealing and rotating fitting of the nozzle (5-6) is mounted on the upper end of the blow molding tube (5-2). The bottom of the top box (3) is provided with a docking groove (5-7). An external blow molding head (5-8) is inserted into the docking groove (5-7). A support layer (5-9) is provided around the outer surface of the external blow molding head (5-8).

4. A plastic pail blow molding machine with blow molding head replacement facilitation in accordance with claim 3 wherein, Both ends of the bottom of the top box (3) are horizontally provided with a sleeve (5-10) connected by a linear drive, and the sleeve (5-10) is fitted into the bottom of the support layer (5-9).

5. A plastic pail blow molding machine with blow molding head replacement facilitation in accordance with claim 1 wherein, The molding component (6) includes a pair of slide rails (6-1), both of which are disposed on the surface of the equipment base (1). Both ends of the slide rails (6-1) are slidably connected to molding molds (6-2). A pair of cylinders (6-3) are disposed on the side surface of the stand (2), and the output end of the cylinders (6-3) is connected to the molding molds (6-2).

6. A plastic pail blow molding machine with blow molding head replacement facilitation in accordance with claim 2 wherein, The outer surface of the twisted layer (5-5) has a polygonal structure.

7. A plastic bucket blow molding machine with an easily replaceable blow molding head according to claim 3, characterized in that, A sealing protrusion (7) is provided around the outer surface of the outer blow molding head (5-8).

8. A plastic pail blow molding machine with blow molding head replacement facilitation in accordance with claim 3 wherein, The bottom surface of the support layer (5-9) is an inclined structural surface.

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