A two-step launching platform

Abstract

The utility model relates to injection molding machine technical field, concretely relates to a double step injection platform, including frame and auxiliary mechanism, auxiliary mechanism includes material cylinder, discharge pipe, conveying pipe, store material pipe, servo electric jar, piston, injection nozzle, connecting support, heat preservation sleeve, insulating seat, first heating rod, extruding device and heating device, raw material heating melts, and the power of multiple first heating rod is connected, and first heating rod sets up in the cooperation cavity of the shell of store material pipe and heat preservation sleeve, can heat the shell of store material pipe after work and heat up, make the caking plastic of store material pipe in the shutdown cause can melt fast, and this process and raw material melt simultaneously carry out, and then can solve the subsequent start -up work of existing equipment, and the larger material block needs time to heat melt, thereby make the equipment start -up preheating needs through the melting of the fixed material block of the formation of the material liquid of heating plastic raw material after conveying, then carry out processing, and the inconvenient problem of use.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a two-stage injection stage. Background Technology

[0002] Two-stage injection molding machines separate plastic pre-plasticizing and injection. They combine these two processes through a combination of an injection unit and a melting unit. The pre-plasticized plastic is melted using a screw extrusion process, and then the molten plastic is injected into the mold using a plunger-type injection unit. Two-stage injection molding machines are widely used due to their advantages, including a wide range of processable materials, large injection volume, and high efficiency.

[0003] A search revealed that prior art CN220784773U discloses a two-stage injection molding machine injection stage mechanism, including a frame, an injection assembly, a melting assembly, and a connecting assembly. The melting assembly has a first discharge port on the end face of the barrel and a first inlet on the far side wall of the barrel. The storage cylinder of the injection assembly is fixedly connected to the frame, and the plunger is fixed to the piston rod end of the injection cylinder. A discharge port is opened at the upper end of the storage cylinder, and the nozzle is fixed at the end of the storage cylinder. The inner hole of the nozzle is connected to the inside of the storage cylinder. The discharge pipe of the connecting assembly connects the first discharge port of the barrel and the discharge port of the storage cylinder. A check chamber is provided in the inner hole of the discharge pipe. An exhaust port is opened at the top of the outer side wall of the barrel of the melting assembly, and a residual material groove is opened inside the barrel. The exhaust port penetrates the side wall of the barrel and the residual material groove and communicates with the inner hole of the barrel. The oil discharged from the melt motor flows into the rod chamber of the injection cylinder through the follower valve assembly, driving the plunger to move slowly to the outside of the storage cylinder, thus preventing the plastic material from overflowing from the vent hole due to excessive pressure inside the barrel.

[0004] However, the above-mentioned two-stage injection molding machine injection stage mechanism has the following problems when in use: when the machine is stopped after processing, there will be plastic liquid inside the storage cylinder. After the plastic liquid cools down, it is easy to form a fixed block of material. When the equipment is restarted, it takes time for the larger blocks of material to melt. Therefore, when the equipment is started and preheated, it is necessary to heat the plastic raw material to form a liquid material before conveying it to melt the fixed blocks of material, and then process it. This is inconvenient to use. Utility Model Content

[0005] The purpose of this invention is to provide a two-stage injection stage, which aims to solve the problem that when the existing equipment is restarted, it takes time for larger material blocks to melt upon heating. This means that during the preheating process after the equipment starts up, the plastic raw material needs to be heated to form a liquid before being transported to melt the fixed material blocks, which is inconvenient to use.

[0006] To achieve the above objectives, this utility model provides a two-stage firing platform, including a frame and an auxiliary mechanism;

[0007] The auxiliary mechanism includes a material cylinder, a discharge pipe, a conveying pipe, a storage pipe, a servo cylinder, a piston, a nozzle, a connecting bracket, a heat-insulating sleeve, an insulating seat, a first heating rod, an extrusion device, and a heating device. The material cylinder is located on the upper side of the frame, and the discharge pipe is located outside the discharge port of the material cylinder. The conveying pipe is connected to both the storage pipe and the discharge pipe and is equipped with a one-way valve. The storage pipe is located between the frame and the material cylinder. The servo cylinder is mounted on the frame, and its output end is connected to the piston. The piston can slide inside the storage pipe. The nozzle is installed on the discharge side of the storage pipe. The connecting bracket is detachably connected to both the heat-insulating sleeve and the frame. The heat-insulating sleeve is slidably fitted onto the outside of the storage pipe. The insulating seat is detachably connected to the heat-insulating sleeve and has multiple first heating rods arranged in a ring at intervals. The extrusion device is located inside the material cylinder, and the heating device is located outside the material cylinder.

[0008] The extrusion device includes a drive motor and a feeding screw. The drive motor is installed on the side of the material barrel away from the discharge pipe. The feeding screw is rotatably installed inside the material barrel and is connected to the output shaft of the drive motor via a coupling.

[0009] The heating device includes an insulating plate and a second heating rod. The insulating plate is installed on the end cap of the material cylinder near the discharge pipe. A plurality of the second heating rods are arranged on the insulating plate.

[0010] The material cylinder has a tapered structure inside, with the lowest point of the tapered structure close to the discharge pipe.

[0011] The dual-stage injection stage further includes a sealing mechanism, which includes a cover plate and a venting mesh. The cover plate is detachably connected to the material cylinder and is located on top of the material cylinder; the venting mesh is detachably connected to the cover plate and is located on top of the cover plate.

[0012] This utility model discloses a dual-stage injection stage. When the equipment restarts after a shutdown, the one-way valve is first closed. Then, the plastic raw material is melted and pre-formed into injection molten plastic through the cooperation of the material cylinder and the heating device. Then, while the raw material is being heated and melted, the power supply of multiple first heating rods is turned on. The first heating rods are set in the mating cavity between the outer shell of the storage tube and the heat insulation sleeve. After operation, the outer shell of the storage tube can be heated to raise the shell temperature, thereby allowing the clumps of plastic inside the storage tube caused by the shutdown to melt quickly. This process is carried out simultaneously with the melting of the raw material, and subsequent processing can be carried out directly. This solves the problem that when existing equipment restarts, larger clumps of material require time to melt, which means that the equipment needs to heat the plastic raw material to form molten material before conveying and melting the fixed clumps before processing, which is inconvenient. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the overall structure of the double-stage firing platform according to the first embodiment of this utility model.

[0015] Figure 2 This is a schematic diagram of the feeding screw according to the first embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the overall structure of the double-stage firing platform according to the second embodiment of this utility model.

[0017] In the diagram: 101-Frame, 102-Barrel, 103-Discharge pipe, 104-Conveying pipe, 105-Storage pipe, 106-Servo electric cylinder, 107-Piston, 108-Injection nozzle, 109-Connecting bracket, 110-Insulation sleeve, 111-Insulation seat, 112-First heating rod, 113-One-way valve, 114-Drive motor, 115-Feeding screw, 116-Insulation plate, 117-Second heating rod, 201-Cover plate, 202-Ventilation mesh. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] Example 1:

[0020] like Figure 1 and Figure 2 As shown, where Figure 1 This is a schematic diagram of the overall structure of the dual-stage firing platform. Figure 2This is a schematic diagram of the feeding screw 115. This utility model provides a two-stage injection stage: including a frame 101 and an auxiliary mechanism. The auxiliary mechanism includes a material cylinder 102, a discharge pipe 103, a conveying pipe 104, a storage pipe 105, a servo cylinder 106, a piston 107, an injection nozzle 108, a connecting bracket 109, a heat-insulating sleeve 110, an insulating seat 111, a first heating rod 112, an extrusion device, and a heating device. The extrusion device includes a drive motor 114 and a feeding screw 115. The heating device includes an insulating plate 116 and a second heating rod 117. The aforementioned solution solves the problem that when existing equipment restarts, larger material blocks require time to melt, necessitating preheating by heating the plastic raw material to form a molten liquid before conveying and melting the fixed material blocks before processing, which is inconvenient. The aforementioned solution allows for simultaneous melting of the material blocks cooled and fixed inside the storage pipe 105 during raw material melting.

[0021] In this embodiment, the frame 101 is used for mounting and supporting the working components. The frame 101 can be mounted on a moving mechanism, such as the linear moving mechanism formed by a slide table and slide rail disclosed in prior art CN218593531 U.

[0022] The material cylinder 102 is located on the upper side of the frame 101, and the discharge pipe 103 is located outside the discharge port of the material cylinder 102. The conveying pipe 104 is connected to the storage pipe 105 and the discharge pipe 103 respectively, and is equipped with a one-way valve 113. The storage pipe 105 is located between the frame 101 and the material cylinder 102. The servo electric cylinder 106 is mounted on the frame 101, and its output end is connected to the piston 107. The piston 107 can move within the storage pipe... The nozzle 108 is installed on the discharge side of the storage tube 105 and slides inside the tube 105. The connecting bracket 109 is detachably connected to the insulation sleeve 110 and the frame 101 respectively. The insulation sleeve 110 is slidably fitted on the outside of the storage tube 105. The insulating seat 111 is detachably connected to the insulation sleeve 110 and multiple first heating rods 112 are arranged in a ring at intervals. The extrusion device is located inside the material cylinder 102 and the heating device is located outside the material cylinder 102. The outer shell of the material cylinder 102 is welded and fixed to the frame 101. End caps are located on both sides, and a rotating feed screw 115 is positioned between the end caps. A high-temperature resistant sealing ring is installed within the cavity where the feed screw 115 mates with the end cap. The conveying pipe 104 and the discharge pipe 103 cooperate to convey the injection molding liquid. The one-way valve 113 is an electric valve for easy automatic control. The fixing plate of the nozzle 108 is fixed with bolts. The two ends of the connecting bracket 109 are fixed with bolts respectively. The servo cylinder 106 is fixed to the frame 101 with bolts, and a connecting plate is installed on its output end with countersunk bolts. The connecting plate is connected to the connecting rod of the piston 107 with bolts. The piston 107 has a T-shaped structure, and its sliding part can slide within the material storage pipe. When the piston 107 slides internally and abuts against the inner wall of the discharge side of the storage tube 105, the outlet of the conveying tube 104 is located directly above the sliding part and as close as possible to the front side of the sliding part. This structure prevents the injection liquid from falling off the rear side of the piston 107 when it moves to its maximum position near the nozzle 108. The heat insulation sleeve 110 has multiple mounting cavities and a clearance cavity for the conveying tube 104. The insulating seat 111 is fixed by bolts and has an exhaust hole. Multiple first heating rods 112 are mounted on the insulating seat 111, and the heating working end is located inside the heat insulation sleeve 110. The heating working end contacts the outer shell of the storage tube 105 through the mounting cavities spaced apart on the heat insulation sleeve 110. The extrusion device is used for mixing and discharging the liquid.

[0023] Secondly, the drive motor 114 is installed on the side of the material cylinder 102 away from the discharge pipe 103; the feeding screw 115 is rotatably installed inside the material cylinder 102 and connected to the output shaft of the drive motor 114 via a coupling. The drive motor 114 is fixed to the motor bracket with bolts, and the motor bracket is detachably installed on the end cover on one side of the material cylinder 102. The connecting shaft of the feeding screw 115 is connected to the output shaft of the drive motor 114 via a coupling. During operation, the one-way valve 113 is opened, and then the drive motor 114 is controlled to drive the feeding screw 115 to rotate, thereby extruding the raw material, which is then discharged from the discharge pipe 103. The flow rate of the liquid entering the storage pipe 105 is controlled by controlling the working time of the drive motor 114 and the one-way valve 113.

[0024] Then, the insulating plate 116 is installed on the end cap of the material cylinder 102 near the discharge pipe 103; a plurality of second heating rods 117 are disposed on the insulating plate 116. The insulating plate 116 is fixed to the end cap on the discharge side of the material cylinder 102 by bolts, and the fixing seat of the second heating rod 117 is connected to the insulating plate 116 by bolts. In actual design, its heating part can be attached to the outside of the shell of the material cylinder 102.

[0025] Finally, the inside of the barrel 102 has a tapered structure, with the lowest point of the tapered structure close to the discharge pipe 103. Setting the inside of the barrel 102 to a tapered structure is more conducive to the discharge of the injection molding liquid.

[0026] When using this invention to melt raw materials while simultaneously melting the cooled and fixed material block inside the storage tube 105, upon restarting the equipment after a shutdown, first control the one-way valve 113 to close. Then, through the cooperation of the material cylinder 102 and the heating device, the plastic raw material is melted to pre-form injection molding liquid. Then, while the raw material is being heated and melted, the power supply to multiple first heating rods 112 is turned on. The first heating rods 112 are located within the mating cavity between the outer shell of the storage tube 105 and the insulation sleeve 110. After operation, they can heat the outer shell of the storage tube 105, raising the shell height of the storage tube 105. The body temperature allows the clumps of plastic inside the storage pipe 105 caused by machine shutdown to melt quickly. This process occurs simultaneously with the raw material melting, allowing for direct processing afterward. It eliminates the need for pre-melting the raw material and then conveying hot liquid into the storage pipe 105 for melting. Larger blocks also require a certain amount of time to melt upon contact with the hot liquid, thus extending the preheating time. This solves the problem of existing equipment where, upon restarting, larger blocks require time to melt, necessitating preheating by heating the plastic raw material to form a liquid before conveying it to melt the clumps and then processing them, which is inconvenient.

[0027] Example 2:

[0028] like Figure 3 As shown, where Figure 3 This is a schematic diagram of the overall structure of the dual-stage firing platform. Based on the first embodiment, this utility model provides a dual-stage firing platform, which also includes a sealing mechanism, including a cover plate 201 and a ventilation mesh 202.

[0029] The cover plate 201 is detachably connected to the material cylinder 102 and is located on top of the material cylinder 102; the venting mesh 202 is detachably connected to the cover plate 201 and is located on top of the cover plate 201. The cover plate 201 is directly slidably fastened to the top of the hopper at the top of the material cylinder 102 to prevent external impurities from entering the interior after the plastic raw material is added, and the venting mesh 202 is used for venting during heating.

[0030] In this embodiment, by providing the cover plate 201 and the ventilation net 202, the entry of external impurities into the interior can be reduced after the plastic raw material is added.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A two-stage firing platform, comprising a frame, characterized in that: It also includes auxiliary mechanisms; The auxiliary mechanism includes a material cylinder, a discharge pipe, a conveying pipe, a storage pipe, a servo cylinder, a piston, a nozzle, a connecting bracket, a heat-insulating sleeve, an insulating seat, a first heating rod, an extrusion device, and a heating device. The material cylinder is located on the upper side of the frame, and the discharge pipe is located outside the discharge port of the material cylinder. The conveying pipe is connected to both the storage pipe and the discharge pipe and is equipped with a one-way valve. The storage pipe is located between the frame and the material cylinder. The servo cylinder is mounted on the frame, and its output end is connected to the piston. The piston can slide inside the storage pipe. The nozzle is installed on the discharge side of the storage pipe. The connecting bracket is detachably connected to both the heat-insulating sleeve and the frame. The heat-insulating sleeve is slidably fitted onto the outside of the storage pipe. The insulating seat is detachably connected to the heat-insulating sleeve and has multiple first heating rods arranged in a ring at intervals. The extrusion device is located inside the material cylinder, and the heating device is located outside the material cylinder.

2. The dual-stage firing platform as described in claim 1, characterized in that: The extrusion device includes a drive motor and a feeding screw. The drive motor is installed on the side of the material barrel away from the discharge pipe. The feeding screw is rotatably installed inside the material barrel and is connected to the output shaft of the drive motor via a coupling.

3. The dual-stage firing platform as described in claim 1, characterized in that: The heating device includes an insulating plate and a second heating rod. The insulating plate is installed on the end cap of the material cylinder near the discharge pipe. A plurality of the second heating rods are arranged on the insulating plate.

4. The dual-stage firing platform as described in claim 1, characterized in that: The inside of the material cylinder has a tapered structure, with the lowest point of the tapered structure close to the discharge pipe.

5. The dual-stage firing platform as described in claim 1, characterized in that... : The dual-stage injection stage also includes a sealing mechanism, which includes a cover plate and a venting mesh. The cover plate is detachably connected to the material cylinder and is located on top of the material cylinder; the venting mesh is detachably connected to the cover plate and is located on top of the cover plate.

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