An injection molding structure that is easy to disassemble and maintain and a disassembly and maintenance method thereof
The injection molding structure facilitates quick disassembly and maintenance by using a synchronous belt mechanism and optimized guide rails, reducing time and costs, and enhancing efficiency and precision in large-scale machines.
Patent Information
- Application Number
- CN202411424336.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2044-10-12
AI Technical Summary
Large-scale injection molding machines face significant challenges in the disassembly and maintenance of glue barrels and screws, requiring labor-intensive, time-consuming processes that involve heavy components and pose safety hazards, with high costs and risks of component damage.
An injection molding structure with a reciprocating shooting platform base, a synchronous belt melting mechanism, and optimized guide rails allows for quick disassembly and maintenance by pulling out the melt cylinder and screw from the front side without disassembling the platform, utilizing a servo motor and improved heat dissipation, and incorporating double mechanical positioning for rapid assembly.
The structure significantly reduces disassembly and maintenance time by 1/3, improves efficiency, reduces energy consumption by 5%, and maintains high precision without reassembling the platform, while minimizing component wear and overheating risks.
Smart Images
Figure CN118927547B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of injection molding equipment, and in particular to an injection molding structure which is easy to disassemble, assemble and maintain, and a disassembly, assembling and maintaining method thereof. Background Art
[0002] Injection molding technology is an efficient manufacturing process widely used in the production of plastic products. It heats the plastic material to a molten state, then injects it into the mold and cools it to form it, producing a variety of complex plastic parts. Injection molding machines generally include a clamping mechanism and an injection molding structure. The injection molding structure consists of a shooting platform assembly, a melt assembly, and a glue injection mechanism. According to the different control methods, it is divided into hydraulic injection molding machines and all-electric injection molding machines. The hydraulic control method is relatively traditional, and includes double-cylinder injection and single-cylinder injection. Its characteristics are large injection inertia, high energy consumption, slow response, and great influence on injection accuracy and service life. The injection molding machine with a fully electric control system is traditionally screw injection and melt glue. Its characteristic is that the screw cannot meet the selection and use of large equipment. Therefore, the injection tonnage of the all-electric injection molding machine is not large, which is also a bottleneck of the all-electric injection molding machine. In addition, the investment and maintenance costs of all-electric injection molding machines are relatively higher.
[0003] Therefore, in large-tonnage machines that require strong loads and pressures, the dual-cylinder hydraulic injection control system can still handle the needs of high loads and high pressures well. The injection molding structure of traditional large-tonnage machines generally drives the shooting platform components to move through the shooting cylinder and the shooting guide rod, and then drives the movement of the second shooting plate through the first shooting plate and the shooting cylinder fixed on the shooting platform to complete the injection action. As the tonnage of the machine increases, the static friction that needs to be overcome for the movement of each component is also greater, and the response efficiency also decreases accordingly. At the same time, due to the increase in the size of the machine, the length and diameter of the melt cylinder components such as the melt cylinder will also increase accordingly to adapt to the larger plastic processing capacity, and the head plate and the second plate of the shooting platform are also thick and large in size to support large molds and withstand higher injection pressures.
[0004] When it is necessary to replace different plastics, or to clean the glue barrel regularly, or when the glue barrel or screw is worn, broken, or has surface damage, it is necessary to pull it out for maintenance or replacement. In traditional injection molding machine maintenance or replacement of glue barrels or screws, the shooting platform and the second shooting plate need to be disassembled and moved away by lifting equipment, and then the glue barrel and screw need to be pulled out for maintenance or replacement; this process usually requires the removal of a large number of extremely heavy parts, and requires suspended operation, which is labor-intensive, inefficient, and has great safety hazards for the operator. It also takes a long time and is prone to component damage during the transfer process; not only that, after the maintenance or replacement of the glue barrel or screw is completed, the removed parts need to be reassembled, and the reassembled equipment needs to be adjusted and debugged to ensure its performance and stability, which is a complicated and arduous process. For the existing glue barrel or screw maintenance and replacement, the process of pulling out the glue barrel or screw alone requires at least a lot of manpower and material resources and more than 3 hours of high-intensity work to complete.
[0005] Therefore, how to reduce the difficulty of assembly and maintenance of injection molding structures and improve work efficiency is an urgent problem to be solved in the current application of large-scale injection molding machines. Summary of the invention
[0006] In order to solve the technical problems existing in the above-mentioned prior art, one of the purposes of the present invention is to provide an injection molding structure that is easy to disassemble, assemble and maintain.
[0007] A second object of the present invention is to provide a method for disassembling and assembling an injection molding structure that is easy to disassemble and maintain.
[0008] One of the purposes of the present invention is achieved through the following technical solutions:
[0009] The invention relates to an injection molding structure which is easy to disassemble and maintain, comprising an injection guide rail and a shooting platform base which can reciprocate along the injection guide rail; a glue injection mechanism and a synchronous belt glue melting mechanism are arranged on the shooting platform base; the glue injection mechanism comprises a glue injection plate installed on the shooting platform base, a glue injection plate which can be movably arranged on the shooting platform base, a glue melting cylinder installed on the glue injection plate through a glue melting cylinder nut, and a screw located in the glue melting cylinder; a glue injection cylinder is arranged on the glue injection plate, and a glue injection guide rail is arranged on the shooting platform base, and the glue injection plate can reciprocate along the glue injection guide rail under the drive of the glue injection cylinder; the length of the glue injection guide rail is less than the length of the injection guide rail; the synchronous belt glue melting mechanism is arranged on the glue injection plate, comprising a glue melting motor, a glue melting pinion which is connected to the output shaft of the glue melting motor, and a glue melting gear which is connected to the glue melting pinion through a synchronous belt; a transmission shaft which is connected to the screw is penetrated by the glue injection plate; and the end of the transmission shaft which is away from the screw is connected to the glue melting gear.
[0010] Further explanation: the first glue injection plate is transversely penetrated by a glue melt barrel assembly hole matched with the outer diameter of the glue melt barrel; the glue melt barrel and the screw are installed in the glue melt barrel assembly hole; at least one positioning pin for limiting the assembly of the glue melt barrel is radially protruded outwardly on the outer wall of the glue melt barrel, and a positioning groove matched with the positioning pin is recessed on the inner wall of the glue melt barrel assembly hole, and a limiting portion for limiting the positioning pin is provided at one end of the positioning groove close to the second glue injection plate.
[0011] It is further explained that the positioning groove is distributed along the axial direction of the melt glue cylinder, and the vertical cross-section shape of the positioning pin and the positioning groove is arc-shaped; the melt glue cylinder is close to the melt glue cylinder assembly hole and away from the second injection plate. The end is provided with a first limit platform and a second limit platform distributed in a stepped manner; the outer diameter of the first limit platform is smaller than the outer diameter of the second limit platform; the first limit platform is provided with the positioning pin; the edge of the second limit platform abuts the opening of the melt glue cylinder assembly hole, and a cooling ring is provided on its outer periphery, and one end face of the cooling ring abuts against the first injection plate.
[0012] It is further explained that the length ratio of the injection guide rail to the injection transfer guide rail is 1: (2.5-3.2); the two injection guide rails are symmetrically arranged above the shooting platform base with the midline of the plane where the upper surface of the shooting platform base is located as the center; the two injection transfer guide rails are symmetrically arranged below the shooting platform base with the plane where the midline is located as the center; and the distance between the two injection transfer guide rails is greater than the distance between the two injection guide rails.
[0013] Further explanation: installation limit columns are symmetrically arranged below the injection molding plate, and installation holes matching with the installation limit columns are arranged on the shooting platform base; the installation limit columns are inserted into the installation holes.
[0014] Further explanation: a V-shaped supporting portion is provided on the second injection molding plate, the melt molding motor is installed on the supporting portion through a motor fixing plate, and is located on a side close to the first injection molding plate, and its output shaft passes through the motor fixing plate and is connected to the melt molding pinion; a heat dissipation structure is provided at the end of the melt molding motor; the heat dissipation structure includes a heat dissipation cover arranged around the end of the melt molding motor and a plurality of heat dissipation fans arranged on the side wall of the heat dissipation cover.
[0015] It is further specified that the melt motor is a servo motor.
[0016] Further explanation: a transmission assembly cavity which runs transversely through the second injection molding plate is provided, and the transmission shaft is rotatably arranged in the transmission assembly cavity through a first bearing and a second bearing; an axial blind hole is provided at one end of the transmission shaft connected to the screw rod, and one end of the screw rod connected to the transmission shaft extends into the blind hole and is locked with the transmission shaft through two symmetrical semi-lunar pressure plates.
[0017] It is further explained that a third bearing is provided at the opening of one end of the transmission assembly cavity close to the screw, and a bearing cover is tightly provided on the outer side of the third bearing; the first bearing is a thrust ball bearing, the second bearing is a deep groove ball bearing; and the third bearing is a tapered roller bearing.
[0018] Further explanation: the said first glue injection plate is provided with a said glue injection cylinder on both sides of the glue melting cylinder; the said first glue injection plate is provided with a cylinder assembly cavity for installing the glue injection cylinder on both sides; the cylinder body of the said glue injection cylinder is fixed in the said cylinder assembly cavity, and the piston rod of the said glue injection cylinder extends to the outside of the said first glue injection plate through the said cylinder assembly cavity toward the direction of the said second glue injection plate, and is fastened to the said second glue injection plate through a locking nut.
[0019] The second object of the present invention is achieved by the following technical solutions:
[0020] A disassembly and maintenance method for the above-mentioned injection molding structure that is easy to disassemble and maintain, wherein the disassembly of the melt cylinder and the screw comprises the following steps:
[0021] Step 1: By driving with power, the shooting platform base drives the injection mechanism and the synchronous belt melting mechanism to move backward along the shooting guide rail to the end of the shooting guide rail, so that the backward movement distance of the shooting platform base is greater than the distance between one end of the screw connecting the transmission shaft and the second limit platform of the melting cylinder;
[0022] Step 2: Remove the nut of the glue melt barrel and loosen the connection between the screw and the transmission shaft, so that the glue melt barrel and the screw are in a movable state;
[0023] Step 3: On the side of the first injection plate away from the second injection plate, the melt glue cylinder and the screw in the melt glue cylinder are gradually pulled out from the assembly hole of the melt glue cylinder by a lifting tool until the melt glue cylinder and the screw are completely pulled out, thereby completing the disassembly operation;
[0024] Step 4: After completing the maintenance operation of the melt glue barrel and the screw, insert the whole melt glue barrel from the side of the first injection plate away from the second injection plate into the assembly hole of the melt glue barrel until the positioning pin is located at the target position of the positioning groove, and then complete the locking of the melt glue barrel nut and the connection of the screw and the transmission shaft.
[0025] The second object of the present invention is achieved by the following technical solutions:
[0026] A disassembly and assembly maintenance method for the above-mentioned injection molding structure that is easy to disassemble and maintain, wherein the assembly of the injection molding structure comprises the following steps:
[0027] Step 1: hoist the injection molding plate to the top of the injection molding platform base by hoisting tools, insert the installation limit column into the installation hole, complete the positioning of the injection molding plate, and lock it by fasteners;
[0028] Step 2: Install the injection cylinder onto the injection plate 1 and fix it preliminarily; then hoist the injection plate 2 with the transmission shaft pre-installed onto the injection guide rail, and make it slidably connected with the injection guide rail, and then fasten the piston rod of the injection cylinder to the injection plate 2 through the locking nut;
[0029] Step 3: Insert the melt glue barrel and the screw as a whole from the side of the first injection plate away from the second injection plate into the assembly hole of the melt glue barrel until the positioning pin is located at the target position of the positioning groove, and then complete the locking of the melt glue barrel nut and the connection of the screw and the transmission shaft;
[0030] Step 4: Install the melt-melting motor onto the supporting part of the second injection plate through the motor fixing plate, and then complete the connection between the melt-melting pinion and the output shaft of the melt-melting motor, the connection between the melt-melting gear and the transmission shaft, and the installation of the heat dissipation structure in sequence.
[0031] Compared with the prior art, the present invention has at least the following beneficial effects:
[0032] 1. The present invention optimizes the injection molding structure, adopts a synchronous belt melt mechanism driven by a gear synchronous belt to replace the hydraulic melt motor set at the tail of the shooting platform of the traditional injection molding machine, and optimizes the assembly of the melt motor, etc., and reasonably utilizes the space of the shooting platform base, so that the overall length of the shooting platform assembly is greatly shortened; the structure of the shooting platform base is further improved, and a glue injection guide rail and a shooting transfer guide rail distributed up and down are set, and the double-layer guide rail load is shared, which effectively reduces the friction resistance during the movement; more importantly, by optimizing the length ratio of the upper and lower guide rails, and combining the structural optimization of the first glue injection plate and the melt barrel, the overall length is short and the injection stroke is short, so that the present invention breaks through the limitations of the traditional structure and realizes the effect of quick disassembly and maintenance of the melt barrel and the screw from the front side of the first glue injection plate without disassembling the first glue injection plate, the second glue injection plate and the shooting platform base. The overall process time is 1 / 3 of that of the traditional injection molding machine, which greatly simplifies the cleaning or maintenance time and cost of the melt barrel and the screw, and improves production efficiency;
[0033] 2. The present invention arranges the melt motor on the side of the second injection plate close to the first injection plate, and uses the limited space between the two to store the melt motor, thereby greatly shortening the overall length of the injection platform assembly; in addition, the heat dissipation structure of the melt motor is improved, and the heat dissipation fan of the melt motor is transferred from the back to the side, further shortening the length of the injection structure; in this way, the length of the injection platform assembly can be compressed to the maximum, and sufficient space can be reserved for its backward movement. At the same time, the length ratio of the injection guide rail to the injection transfer guide rail is optimized to 1: (2.5-3.2). On the basis of not changing the length of the injection molding machine frame, an adaptive bottom injection transfer guide rail is designed, so that the melt cylinder can be pulled out and plugged in from the front side without disassembling the injection platform base, which not only reduces the time, but also omits the reassembly and alignment of other components of the shooting platform after maintenance, so that the injection molding machine maintains its original high-precision operation;
[0034] 3. The structural optimization of the injection molding structure of the present invention for achieving rapid assembly also includes that, after the rapid positioning and assembly is completed by installing the limit column and the injection platform base, the center of assembly of all other components is determined, which saves the alignment of the second injection plate, the melt cylinder and the screw, and the assembly distance is short, the center is good, the injection response is faster, and the injection efficiency and accuracy are improved;
[0035] Furthermore, on the basis of greatly shortening the length of the shooting platform assembly, the structures of the first injection plate and the melt glue barrel are optimized, and a stepped second limiting platform and a first limiting platform are arranged on the outer wall of the melt glue barrel. The former is used for assembling the cooling ring and determining the target position of the melt glue barrel; the latter is used for designing the positioning pin, and a matching positioning groove is designed in the assembly hole of the melt glue barrel of the first injection plate; thus, double mechanical positioning is achieved, which is conducive to the rapid positioning of the melt glue barrel after entering the assembly hole of the melt glue barrel; since the melt glue barrel and the screw are pre-assembled as a whole, the design of the positioning pin and the positioning groove will also synchronously ensure that the end of the screw enters the installation position of the blind hole of the transmission shaft, which is convenient for rapid assembly, one-step completion, and simple and ingenious design;
[0036] 4. On the other hand, the design of the melt glue motor of the present invention not only shortens the overall length, but also more effectively dissipates the heat generated by the melt glue motor to the surroundings, avoiding the heat from the end of the melt glue motor to the melt glue cylinder that also generates heat, reducing the risk of overheating of both, and extending the service life; and the synchronous pulley transmission is stable, with low loss, greatly reducing energy consumption, and reducing the energy consumption of the whole machine by 5%; at the same time, the synchronous belt drive reduces the pressure fluctuation and leakage problems in the hydraulic system, the wear of mechanical parts is less, and the maintenance requirements are reduced;
[0037] 5. The overall disassembly method of the glue melt cylinder of the present invention is simple. When disassembling, it is only necessary to disassemble the glue melt cylinder nut and loosen the connection between the screw and the transmission shaft to make the glue melt cylinder and the screw movable. Then, the glue melt cylinder and the screw can be pulled out from the front side of the first glue injection plate without disassembling other components on the base of the shooting platform, which greatly reduces the disassembly time and improves the disassembly efficiency. At the same time, the assembly method is also simple and fast. The first glue injection plate is used as the reference target as a whole. After the fast positioning assembly is completed through the installation limit column and the base of the shooting platform, the center degree of assembly of all other components is determined, which saves the alignment of the second glue injection plate, the glue melt cylinder and the screw. At the same time, the structure of the glue melt cylinder is improved to achieve double alignment, achieving multiple goals at one stroke.
[0038] 6. The present invention is convenient for quick disassembly and maintenance, the overall disassembly takes a short time, the maintenance efficiency is high, the maintenance cost is low, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Figure 1 This is a schematic diagram of the overall structure of the injection molding structure that is easy to disassemble and maintain in a preferred embodiment of the present invention;
[0040] Figure 2 This is a schematic diagram of the retracted state of the injection molding structure for easy disassembly and maintenance in a preferred embodiment of the present invention;
[0041] Figure 3 This is a schematic side view of the overall structure of the injection molding structure that is easy to disassemble and maintain in a preferred embodiment of the present invention;
[0042] Figure 4 A vertical cross-sectional schematic diagram of the overall structure of the injection molding structure that is convenient for disassembly, assembly and maintenance according to a preferred embodiment of the present invention;
[0043] Figure 5 for Figure 4 A is an enlarged schematic diagram of the local structure at center A;
[0044] Figure 6 for Figure 4 A magnified schematic diagram of the local structure at B in the middle;
[0045] Figure 7 This is a schematic cross-sectional view of the overall structure of the injection molding structure that is convenient for disassembly, assembly and maintenance in a preferred embodiment of the present invention;
[0046] Figure 8 This is a schematic diagram of the overall structure of a plastic injection plate of an injection molding structure that is easy to disassemble and maintain in a preferred embodiment of the present invention;
[0047] Fig. 9 This is a schematic diagram of the overall structure of a melt cylinder of an injection molding structure that is easy to disassemble and maintain in a preferred embodiment of the present invention;
[0048] Fig.10 This is a schematic diagram of the overall structure of a synchronous belt melt mechanism of an injection molding structure that is easy to disassemble and maintain in a preferred embodiment of the present invention;
[0049] Fig.11 This is a schematic cross-sectional view of the overall structure of a synchronous belt melt mechanism of an injection molding structure that is easy to disassemble and maintain in a preferred embodiment of the present invention.
[0050] In the figure:
[0051] 1. Shooting guide rail; 2. Shooting platform base; 21. Shooting guide rail; 22. Mounting hole; 3. Shooting mechanism; 31. Shooting plate 1; 311. Melting tube assembly hole; 312. Positioning groove; 3121. Limiting part; 313. Installing limiting column; 314. Oil cylinder assembly cavity; 32. Shooting plate 2; 321. Supporting part; 322. Transmission assembly cavity; 33. Melting tube nut; 34. Melting tube; 341. Positioning pin; 342. First limiting platform; 343. Second limiting platform; 35. Screw ;36, injection cylinder;361, cylinder body;362, piston rod;37, cooling ring;4, synchronous belt melting mechanism;41, melting motor;42, melting pinion;43, synchronous belt;44, melting gear;45, transmission shaft;451, blind hole;46, motor fixing plate;47, heat dissipation structure;471, heat dissipation cover;472, heat dissipation fan;48, first bearing;49, second bearing;5, half-moon pressure plate;6, locking nut;7, third bearing;8, bearing gland;
[0052] L1: length of injection guide rail; L2: length of injection transfer guide rail. DETAILED DESCRIPTION
[0053] In order to facilitate the understanding of the present invention, the technical solutions and advantages of the invention are further described in detail below in conjunction with the accompanying drawings and embodiments. The specific structure and features of the present invention are described below in an exemplary manner, which should not constitute any limitation to the present invention. At the same time, any technical feature mentioned below (including implicit or disclosed), as well as any technical feature directly displayed or implied in the figure, can continue to be arbitrarily combined or deleted between these technical features, so as to form more other embodiments that may not be directly or indirectly mentioned in the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.
[0054] It should be noted that the construction and arrangement of the present invention shown in a plurality of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, structure, shape, and proportion of various elements) without substantially departing from the novel teachings and advantages of the subject matter described in this application. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present invention.
[0055] Example 1
[0056] like Figure 1-11 As shown, this embodiment 1 provides an injection molding structure that is easy to disassemble and maintain, including an injection guide rail 1 and a shooting platform base 2 that can reciprocate along the injection guide rail 1; the shooting platform base 2 is provided with an injection mechanism 3 and a synchronous belt melting mechanism 4; the injection mechanism 3 includes an injection plate 31 installed on the shooting platform base 2, an injection plate 32 movably arranged on the shooting platform base 2, a melting tube 34 installed on the injection plate 31 through a melting tube nut 33, and a screw 35 located in the melting tube 34; the injection plate 31 is provided with an injection cylinder 36, and the shooting platform base 2 is provided with an injection guide rail 2 1, the second glue injection plate 32 can reciprocate along the glue injection guide rail 21 under the drive of the glue injection cylinder 36; the length of the glue injection guide rail 21 is less than the length of the injection guide rail 1; the synchronous belt glue melting mechanism 4 is installed on the second glue injection plate 32, including a glue melting motor 41, a glue melting pinion 42 drivingly connected to the output shaft of the glue melting motor 41, and a glue melting large gear 44 drivingly connected to the glue melting pinion 42 through a synchronous belt 43; the second glue injection plate 32 is penetrated by a transmission shaft 45 connected to the screw rod 35; the end of the transmission shaft 45 away from the screw rod 35 is drivingly connected to the glue melting large gear 44.
[0057] The base of the shooting platform of this embodiment moves back and forth along the shooting guide rail under the drive of the shooting drive mechanism (not shown in the drawings), pushing the injection mechanism and the synchronous belt melting mechanism as a whole toward the clamping mechanism, and then the second injection plate moves forward along the injection guide rail under the drive of the injection cylinder to complete the injection action; the melting motor drives the transmission shaft to rotate through the drive of the melting pinion, the synchronous belt and the melting gear to drive the screw to rotate, thereby performing the melting and plasticizing operation of the plastic.
[0058] The present invention optimizes the injection molding structure, adopts a synchronous belt melting mechanism driven by a gear synchronous belt to replace the hydraulic melting motor arranged at the tail of the shooting platform of the traditional injection molding machine, and optimizes the assembly of the melting motor, etc., and rationally utilizes the space of the shooting platform base, so that the overall length of the shooting platform assembly is greatly shortened; the structure of the shooting platform base is further improved, and an injection guide rail and an injection shift guide rail distributed up and down are arranged, and the double-layer guide rail load is shared, which effectively reduces the friction resistance during the movement; the overall length is short and the injection stroke is short, so that the present invention breaks through the limitations of the traditional structure and achieves the effect of quick disassembly and maintenance of the melting cylinder and the screw by pulling out the melting cylinder from the front side of the first injection plate without disassembling the first injection plate, the second injection plate and the shooting platform base.
[0059] In this embodiment, the melt motor 41 is a servo motor. By arranging the melt motor on the side of the second injection plate close to the first injection plate, the limited space between the two is used to store the melt motor, which greatly shortens the overall length of the injection platform assembly; in addition, the heat dissipation structure of the melt motor is improved, and the heat dissipation fan of the melt motor is moved from the back to the side, further shortening the length of the injection molding structure; in this way, the length of the injection platform assembly can be compressed to the maximum, and sufficient space can be reserved for its backward movement.
[0060] Preferably, the first glue-shooting plate 31 is transversely penetrated by a glue-melting cylinder assembly hole 311 matched with the outer diameter of the glue-melting cylinder 34; the glue-melting cylinder 34 and the screw 35 are penetrated and installed in the glue-melting cylinder assembly hole 311; at least one positioning pin 341 for assembly and limiting the glue-melting cylinder 34 is radially protruded outwardly on the outer wall of the glue-melting cylinder 34, and a positioning groove 312 matched with the positioning pin 341 is recessed on the inner wall of the glue-melting cylinder assembly hole 311, and a limiting portion 3121 for limiting the positioning pin 341 is provided at one end of the positioning groove 312 close to the second glue-shooting plate 32.
[0061] Preferably, the positioning groove 312 is distributed along the axial direction of the melt glue cylinder 34, and the vertical cross-section shape of the positioning pin 341 and the positioning groove 312 is arc-shaped; the end of the melt glue cylinder 34 close to the melt glue cylinder assembly hole 311 away from the second injection plate 32 is provided with a first limiting platform 342 and a second limiting platform 343 distributed in a stepped manner; the outer diameter of the first limiting platform 342 is smaller than the outer diameter of the second limiting platform 343; the first limiting platform 342 is provided with the positioning pin 341; the edge of the second limiting platform 343 abuts the opening of the melt glue cylinder assembly hole 311, and a cooling ring 37 is sleeved on its outer periphery, and one end face of the cooling ring 37 abuts against the first injection plate 31. Specifically, in this embodiment, the positioning groove is a semicircular groove, and the limiting portion can be the bottom of the groove, or a limiting protrusion structure set at any point in the positioning groove. The top of the positioning pin has a hemispherical structure, which can better match the shape of the positioning groove and is conducive to positioning. After installation, the cooperation between the positioning pin and the positioning groove can also prevent the circumferential displacement of the melt glue cylinder during operation.
[0062] In this embodiment, on the basis of greatly shortening the length of the shooting platform assembly, the structure of the first injection molding plate and the melt glue barrel is optimized, and a stepped second limit platform and a first limit platform are arranged on the outer wall of the melt glue barrel. The former is used for assembling the cooling ring and determining the target position of the melt glue barrel; the latter is used for designing the locating pin, combined with the matching locating groove designed in the assembly hole of the melt glue barrel of the first injection molding plate; thus, double mechanical positioning is achieved, which is beneficial to the rapid positioning of the melt glue barrel after entering the assembly hole of the melt glue barrel; since the melt glue barrel and the screw are pre-assembled as a whole, the design of the locating pin and the locating groove will also synchronously ensure that the end of the screw enters the installation position of the blind hole of the drive shaft, which is convenient for rapid assembly and can be completed in one step. The design is simple and ingenious.
[0063] In addition, the design of the second limit platform and the cooling ring can also realize the function of auxiliary positioning during the insertion and assembly process of the melt glue cylinder; further, it can also be used as a locking structure to limit the assembly position of the melt glue cylinder, which is ingeniously designed.
[0064] Preferably, the length ratio of the injection guide 21 to the injection shift guide 1 is 1: (2.5-3); the two injection guides 21 are symmetrically arranged above the shooting platform base 2 with the midline of the plane where the upper surface of the shooting platform base 2 is located as the center; the two injection shift guides 1 are symmetrically arranged below the shooting platform base 2 with the plane where the midline is located as the center; and the distance between the two injection shift guides 1 is greater than the distance between the two injection guides 21. In this embodiment, the length ratio of the injection guide and the injection shift guide is designed based on the compression of the overall length of the injection assembly and the space setting of the frame. Within this length ratio range, it is possible to design an adaptive bottom injection shift guide without changing the length of the injection molding frame, so that the plug-in and unplug operation of the melt cylinder can be completed from the front side without disassembling the shooting platform base. Not only does it reduce time, but it also omits the reassembly and alignment of other components of the shooting platform after maintenance, so that the injection molding machine maintains its original high-precision operation.
[0065] More importantly, by optimizing the length ratio of the upper and lower guide rails and combining the structural optimization of the first injection plate and the melt barrel, the overall length is short and the injection stroke is short, so that the present invention breaks through the limitations of the traditional structure and achieves the effect of rapid disassembly and maintenance of the melt barrel and the screw by pulling out from the front side of the first injection plate without disassembling the first injection plate, the second injection plate and the injection platform base. The overall process time is 1 / 3 of that of the traditional injection molding machine, which greatly simplifies the cleaning or maintenance time and cost of the melt barrel and the screw and improves production efficiency.
[0066] In addition, the distance between the two injection guide rails 1 is greater than the distance between the two injection guide rails 21, which ensures that the centering of the two injection plates and the synchronous belt melting mechanism is better, which is beneficial to reduce the deviation in the injection process and improve the accuracy.
[0067] Preferably, the first injection board 31 is symmetrically provided with installation limit posts 313 below, and the shooting platform base 2 is provided with installation holes 22 adapted to the installation limit posts 313; the installation limit posts 313 are inserted into the installation holes 22. In this embodiment, the first injection board uses the corresponding insertion of the installation limit posts and the installation holes as the positioning reference, quickly aligns and completes the assembly of the first injection board; the whole takes the first injection board as the reference target, and after the rapid positioning and assembly are completed through its installation limit posts and the shooting platform base, the center of assembly of all other components is determined, saving the alignment of the second injection board, the melt cylinder and the screw.
[0068] Preferably, a V-shaped supporting portion 321 is provided on the second injection molding plate 32, and the melt motor 41 is installed on the supporting portion 321 through a motor fixing plate 46 and is located on a side close to the first injection molding plate 31, and its output shaft passes through the motor fixing plate 46 and is connected to the melt pinion 42; a heat dissipation structure 47 is provided at the end of the melt motor 41; the heat dissipation structure 47 includes a heat dissipation cover 471 arranged around the end of the melt motor 41 and a plurality of heat dissipation fans 472 arranged on the side walls of the heat dissipation cover 471. In this embodiment, the glue melt motor is arranged on the side of the second injection plate close to the first injection plate, and the limited space between the two is used to accommodate the glue melt motor, thereby greatly shortening the overall length of the shooting platform assembly. In addition, the heat dissipation structure of the glue melt motor is improved, and the heat dissipation fan of the glue melt motor is moved from the back to the side, thereby further shortening the length of the injection molding structure. In this way, the length of the shooting platform assembly can be compressed to the maximum extent, and sufficient space can be reserved for its rearward movement. With the bottom injection movement guide rail having a suitable length ratio, the glue melt cylinder can be pulled out and plugged in from the front without disassembling the shooting platform base. This not only reduces the time, but also omits the reassembly and alignment of other components of the shooting platform after maintenance, thereby allowing the injection molding machine to maintain its original high-precision workmanship.
[0069] In this embodiment, the heat dissipation hood is a hood structure with a back plate on the back. The back plate can cooperate with the design of the melt glue motor, so that the melt glue motor design not only shortens the overall length, but also more effectively dissipates the heat generated by the melt glue motor to the surroundings, avoiding the heat from the end of the melt glue motor to the melt glue cylinder that also generates heat, reducing the risk of overheating of the two and extending the service life; and the synchronous pulley transmission is stable, the loss is low, the energy consumption is greatly reduced, and the energy consumption of the whole machine is reduced by 5%; at the same time, the synchronous belt drive reduces the pressure fluctuation and leakage problems in the hydraulic system, the wear of mechanical parts is less, and the maintenance requirements are reduced.
[0070] Preferably, the second injection plate 32 is provided with a transmission assembly cavity 322 that runs through horizontally, and the transmission shaft 45 is rotatably arranged in the transmission assembly cavity 322 through the first bearing 48 and the second bearing 49; the end of the transmission shaft 45 connected to the screw 35 is provided with an axial blind hole 451, and the end of the screw 35 connected to the transmission shaft 45 extends into the blind hole 451 and is locked with the transmission shaft 45 through two symmetrical half-moon-shaped pressure plates 5. In this embodiment, the outer periphery of the screw is provided with a locking groove (not shown in the accompanying drawings), which is located at the opening of the blind hole, and the two half-moon-shaped pressure plates are respectively butted and spliced from both sides, and are locked to the end of the transmission shaft by fasteners in the prior art such as bolts. When the transmission shaft rotates driven by the melt gear, the screw is synchronously driven to rotate, and the plastic in the melt barrel is melted and plasticized. The present invention does not elaborate on the specification parameters, working principle, control method, etc. of the screw, and can be configured according to the needs of implementation.
[0071] Preferably, the transmission assembly cavity 322 is provided with a third bearing 7 at the opening of one end close to the screw 35, and a bearing cover 8 is provided on the outer side of the third bearing 7; the first bearing 48 is a thrust ball bearing, the second bearing 49 is a deep groove ball bearing; and the third bearing is a tapered roller bearing. In this embodiment, the advantage of such a design is that the thrust ball bearing handles the axial load, the tapered roller bearing is responsible for handling the radial and axial composite load, and the deep groove ball bearing supports the radial load, which reduces friction and vibration, and improves the operating efficiency and equipment stability.
[0072] The specific assembly method of the injection cylinder is further introduced. The injection plate 31 is located on both sides of the melt tube 34 and is provided with an injection cylinder 36; the two sides of the injection plate 31 are provided with a cylinder assembly cavity 314 for installing the injection cylinder 36; the cylinder body 361 of the injection cylinder 36 is fixed in the cylinder assembly cavity 314, and the piston rod 362 of the injection cylinder 36 extends to the outside of the injection plate 31 through the cylinder assembly cavity 314 toward the injection plate 32, and is fastened to the injection plate 32 through the locking nut 6. This helps to evenly distribute the force acting on the injection system and reduce the wear or failure of mechanical parts caused by unbalanced force. The injection cylinders can be purchased and configured conventionally, and their working principle, installation method, and control method refer to the existing technology, and can be implemented as long as they can achieve the beneficial effects of the present invention.
[0073] It should be noted that the present embodiment also includes other components or systems that meet the injection molding function of the twin-cylinder injection molding machine, such as a clamping unit, an ejection unit, a hydraulic control system, etc. The present invention does not involve improvements to these parts, so they will not be elaborated on.
[0074] Example 2
[0075] This embodiment 2 provides a disassembly and maintenance method for the injection molding structure that is easy to disassemble and maintain as described in the above embodiment 1, wherein the disassembly of the melt cylinder 34 and the screw 35 includes the following steps:
[0076] Step 1: By driving with power, the shooting platform base 2 drives the injection mechanism 3 and the synchronous belt melt mechanism 4 to move backward along the shooting guide rail 1 to the end of the shooting guide rail 1, so that the shooting platform base 2 moves backward by a distance greater than the distance between one end of the screw 35 connected to the transmission shaft 45 and the second limit platform 343 of the melt cylinder 34;
[0077] Step 2: Remove the melt glue cylinder nut 33 and loosen the connection between the screw rod 35 and the transmission shaft 45, so that the melt glue cylinder 34 and the screw rod 35 are in a movable state;
[0078] Step 3: On the side of the first injection plate 31 away from the second injection plate 32, the melt glue cylinder 34 and the screw 35 in the melt glue cylinder 34 are gradually pulled out from the melt glue cylinder assembly hole 311 by a lifting tool until the melt glue cylinder 34 and the screw 35 are completely pulled out, completing the disassembly operation;
[0079] Step 4: After completing the maintenance operation of the melt glue cylinder 34 and the screw rod 35, insert the entire melt glue cylinder 34 and the screw rod 35 into the melt glue cylinder assembly hole 311 from the side of the first injection plate 31 away from the second injection plate 32 until the positioning pin 341 is located at the target position of the positioning groove 312, and then complete the locking of the melt glue cylinder nut 33 and the connection between the screw rod 35 and the transmission shaft 45.
[0080] Among them, the power described in step 1 is the shooting drive force, which completes the overall backward movement of the shooting platform base. Its shooting drive structure and linear drive principle can refer to the existing technology, and the present invention will not elaborate on it. When it is necessary to pull out the melt glue barrel and the screw for cleaning or replacement, first loosen the screw and the drive shaft, and then remove the melt glue barrel nut; this step can be performed by the operator using existing auxiliary tools. The lifting tool in step 2 is also a conventional movable lifting tool in the prior art, or a mobile disassembly tool in the prior art is used. The present invention is not limited to this, as long as the function of pulling out the melt glue barrel and the screw can be achieved.
[0081] In step 4, the positioning pin being located at the target position of the positioning groove means that the positioning pin is in contact with the limiting portion, or the second limiting platform of the melt tube is in contact with the first injection plate.
[0082] The overall disassembly method of the glue melt cylinder 34 of the present invention is simple. When disassembling, it is only necessary to disassemble the glue melt cylinder nut 33 and loosen the connection between the screw rod 35 and the transmission shaft 45 to make the glue melt cylinder 34 and the screw rod 35 movable. Then, the glue melt cylinder 34 and the screw rod 35 can be pulled out from the front side of the glue injection plate 31. There is no need to disassemble other components on the injection platform base 2, which greatly reduces the disassembly time and improves the disassembly efficiency.
[0083] Example 3
[0084] This embodiment 3 provides a disassembly and maintenance method for the above-mentioned injection molding structure that is easy to disassemble and maintain, and the assembly of the injection molding structure includes the following steps:
[0085] Step 1: Use a lifting tool to lift the injection molding plate 31 to the top of the injection molding platform base 2, insert the installation limit column 313 into the installation hole 22, complete the positioning of the injection molding plate 31, and lock it with a fastener; the fastener can be a screw or bolt in the prior art that satisfies the locking function.
[0086] Step 2: Install the injection cylinder 36 onto the injection plate 1 31 and fix it preliminarily; the specific installation method is referred to the hoisting and sliding methods in the prior art, which are not limited thereto; then hoist the injection plate 2 32 pre-installed with the transmission shaft 45 onto the injection guide rail 21, and make it slidably connected with the injection guide rail 21, and then fasten the piston rod 362 of the injection cylinder to the injection plate 2 32 through the locking nut 6;
[0087] Step 3: Insert the melt glue cylinder 34 and the screw 35 as a whole into the melt glue cylinder assembly hole 311 from the side of the first injection plate 31 away from the second injection plate 32 until the positioning pin 341 is located at the target position of the positioning groove 312, and then complete the locking of the melt glue cylinder nut 33 and the connection of the screw 35 and the transmission shaft 45;
[0088] Step 4: Install the melt motor 41 onto the support portion 321 of the second injection plate 32 through the motor fixing plate 46, and then sequentially complete the connection between the melt pinion 42 and the output shaft of the melt motor 41, the connection between the melt gear 44 and the transmission shaft 45, and the installation of the heat dissipation structure 47.
[0089] The above-mentioned assembly method of the present invention is simple and fast. The first injection plate 31 is used as a reference target as a whole. After the fast positioning assembly is completed with the installation limit column 313 and the shooting platform base 2, the center degree of assembly of all other components is determined, which saves the alignment of the second injection plate 32, the melt cylinder 34 and the screw 35. At the same time, the structure of the melt cylinder 34 is improved to achieve double alignment, achieving multiple goals at one stroke.
[0090] Specifically, by arranging a stepped second limit platform and a first limit platform on the outer wall of the melt glue barrel, the former is used for assembling the cooling ring and determining the target position of the melt glue barrel; the latter is used for designing a positioning pin, combined with a matching positioning groove designed in the melt glue barrel assembly hole of the injection molding plate; thereby achieving double mechanical positioning, which is beneficial to the rapid positioning of the melt glue barrel after entering the melt glue barrel assembly hole; since the melt glue barrel and the screw are pre-assembled as a whole, the design of the positioning pin and the positioning groove will also synchronously ensure that the end of the screw enters the installation position of the blind hole of the drive shaft, which is convenient for rapid assembly and in one step.
[0091] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.
Claims
1. An injection molding structure that is easy to disassemble and maintain, characterized in that: It includes a shooting guide rail and a shooting platform base that can reciprocate along the shooting guide rail; a shooting mechanism and a synchronous belt melting mechanism are arranged on the shooting platform base; the shooting mechanism includes a shooting plate installed on the shooting platform base, a second shooting plate movably arranged on the shooting platform base, a melting tube installed on the shooting plate one through a melting tube nut, and a screw located in the melting tube; a shooting cylinder is arranged on the shooting plate one, and a shooting guide rail is arranged on the shooting platform base, and the second shooting plate can reciprocate along the shooting guide rail under the drive of the shooting cylinder; the length of the shooting guide rail is less than the length of the shooting guide rail; the synchronous belt melting mechanism is installed on the second shooting plate, and includes a melting motor, a melting pinion connected to the output shaft of the melting motor, and a melting gear connected to the melting pinion through a synchronous belt; a transmission shaft connected to the screw is penetrated by the second shooting plate; the end of the transmission shaft away from the screw is drivingly connected to the melting gear; The first injection plate is transversely penetrated with a melt glue barrel assembly hole adapted to the outer diameter of the melt glue barrel; the melt glue barrel and the screw are installed in the melt glue barrel assembly hole; at least one positioning pin for limiting the assembly position of the melt glue barrel is radially protruded on the outer wall of the melt glue barrel, and a positioning groove adapted to the positioning pin is recessed on the inner wall of the melt glue barrel assembly hole, and a limiting portion for limiting the positioning pin is provided at one end of the positioning groove close to the second injection plate; The positioning groove is distributed along the axial direction of the melt glue cylinder, and the vertical cross-section shape of the positioning pin and the positioning groove is arc-shaped; the melt glue cylinder is provided with a first limit platform and a second limit platform distributed in a stepped manner at one end close to the melt glue cylinder assembly hole and away from the second injection plate; the outer diameter of the first limit platform is smaller than the outer diameter of the second limit platform; the first limit platform is provided with the positioning pin; the edge of the second limit platform abuts against the opening of the melt glue cylinder assembly hole, and a cooling ring is sleeved on its outer periphery, and one end face of the cooling ring abuts against the first injection plate; The length ratio of the injection guide rail to the injection transfer guide rail is 1: (2.5-3.2); the two injection guide rails are symmetrically arranged above the shooting platform base with the midline of the plane where the upper surface of the shooting platform base is located as the center; the two injection transfer guide rails are symmetrically arranged below the shooting platform base with the plane where the midline is located as the center.
2. The injection molding structure that is easy to disassemble and maintain as claimed in claim 1 is characterized in that: The lower part of the injection molding plate is symmetrically provided with installation limit columns, and the base of the injection molding platform is provided with installation holes matched with the installation limit columns; the installation limit columns are inserted into the installation holes.
3. The injection molding structure that is easy to disassemble and maintain as claimed in claim 2, characterized in that: A V-shaped supporting portion is provided on the second injection molding plate, and the melt molding motor is installed on the supporting portion through a motor fixing plate and is located on a side close to the first injection molding plate, and its output shaft passes through the motor fixing plate and is connected to the melt molding pinion; a heat dissipation structure is provided at the end of the melt molding motor; the heat dissipation structure includes a heat dissipation cover arranged around the end of the melt molding motor and a plurality of heat dissipation fans arranged on the side wall of the heat dissipation cover.
4. The injection molding structure that is easy to disassemble and maintain as claimed in claim 3, characterized in that: A transmission assembly cavity is provided in the second injection molding plate and runs transversely therethrough. The transmission shaft is rotatably arranged in the transmission assembly cavity through a first bearing and a second bearing. An axial blind hole is provided at one end of the transmission shaft connected to the screw rod. One end of the screw rod connected to the transmission shaft extends into the blind hole and is locked with the transmission shaft through two symmetrical semi-lunar pressure plates.
5. The injection molding structure that is easy to disassemble and maintain as claimed in claim 4, characterized in that: The first glue injection plate is provided with a glue injection cylinder on both sides of the glue melting cylinder; the two sides of the first glue injection plate are provided with cylinder assembly cavities for installing the glue injection cylinder; the cylinder body of the glue injection cylinder is fixed in the cylinder assembly cavity, and the piston rod of the glue injection cylinder extends to the outside of the first glue injection plate toward the direction of the second glue injection plate through the cylinder assembly cavity, and is fastened to the second glue injection plate through a locking nut.
6. A method for disassembling and maintaining an injection molding structure that is easy to disassemble and maintain as claimed in any one of claims 1 to 5, characterized in that: The disassembly of the melt barrel and screw includes the following steps: Step 1: By driving with power, the shooting platform base drives the injection mechanism and the synchronous belt melting mechanism to move backward along the shooting guide rail to the end of the shooting guide rail, so that the backward movement distance of the shooting platform base is greater than the distance between one end of the screw connecting the transmission shaft and the second limit platform of the melting cylinder; Step 2: Remove the nut of the glue melt barrel and loosen the connection between the screw and the transmission shaft, so that the glue melt barrel and the screw are in a movable state; Step 3: On the side of the first injection plate away from the second injection plate, the melt glue cylinder and the screw in the melt glue cylinder are gradually pulled out from the assembly hole of the melt glue cylinder by a lifting tool until the melt glue cylinder and the screw are completely pulled out, thereby completing the disassembly operation; Step 4: After completing the maintenance operation of the melt glue barrel and the screw, insert the whole melt glue barrel from the side of the first injection plate away from the second injection plate into the assembly hole of the melt glue barrel until the positioning pin is located at the target position of the positioning groove, and then complete the locking of the melt glue barrel nut and the connection of the screw and the transmission shaft.
7. A method for disassembling and maintaining an injection molding structure that is easy to disassemble and maintain as claimed in claim 6, characterized in that: The assembly of the injection molding structure comprises the following steps: Step 1: hoist the injection molding plate to the top of the injection molding platform base by hoisting tools, insert the installation limit column into the installation hole, complete the positioning of the injection molding plate, and lock it by fasteners; Step 2: Install the injection cylinder onto the injection plate 1 and fix it preliminarily; then hoist the injection plate 2 with the transmission shaft pre-installed onto the injection guide rail, and make it slidably connected with the injection guide rail, and then fasten the piston rod of the injection cylinder to the injection plate 2 through the locking nut; Step 3: Insert the melt glue barrel and the screw as a whole from the side of the first injection plate away from the second injection plate into the assembly hole of the melt glue barrel until the positioning pin is located at the target position of the positioning groove, and then complete the locking of the melt glue barrel nut and the connection of the screw and the transmission shaft; Step 4: Install the melt-melting motor onto the supporting part of the second injection plate through the motor fixing plate, and then complete the connection between the melt-melting pinion and the output shaft of the melt-melting motor, the connection between the melt-melting gear and the transmission shaft, and the installation of the heat dissipation structure in sequence.