CN114801098A - Novel injection molding machine screw rod heating device - Google Patents

Abstract

The invention relates to the field of injection molding machines, in particular to a novel screw heating device for injection molding machines, comprising a frame, a hopper, a barrel, a screw, a nozzle and a heating ring that is convenient for quick disassembly and installation, and a first mounting bracket is fixedly installed on the frame and the support plate, one end of the support plate is fixedly connected with the end cover of the bushing, the second bearing is installed on the support plate, the material barrel passes through the first mounting bracket and the end cover of the bushing is positioned above the frame in a horizontal state, and the nozzle thread Connected to the front end of the barrel, the screw is inserted into the barrel through the second bearing, the screw is provided with a through groove that penetrates the screw along the axis direction, a heating rod is inserted in the through groove, and the barrel is provided with a through-barrel barrel The feeding port of the wall, the hopper is fixedly connected at the feeding port in a vertical direction, there are two heating rings and both are sleeved on the barrel, and the two heating rings are located near the front end of the screw. This application can ensure that the plastic particles are uniformly heated and plasticized, and is convenient for the replacement and maintenance of the heating device.

Description

A new type of screw heating device for injection molding machine

technical field

The invention relates to the field of injection molding machines, in particular to a novel screw heating device for injection molding machines.

Background technique

Injection molding machine is also known as injection molding machine or injection molding machine. It is the main molding equipment for making thermoplastics or thermosetting plastics into various shapes of plastic products using plastic molding dies. Divided into vertical, horizontal, all-electric. The injection molding machine heats the plastic, applying high pressure to the molten plastic so that it shoots out and fills the mold cavity. The injection system is one of the most important components of the injection molding machine. Generally, there are three main forms: plunger type, screw type, and screw pre-plastic plunger injection type. The most widely used is the screw type. Its function is that in a cycle of the injection molding machine, after a certain amount of plastic can be heated and plasticized within a specified time, the molten plastic can be injected into the mold cavity through a screw under a certain pressure and speed. After the injection is completed, the shape of the molten material injected into the mold cavity is maintained. The injection system consists of a plasticizing device and a power transmission device. The plasticizing device of the screw injection molding machine is mainly composed of a feeding device, a barrel, a screw, a glue-passing component, and a nozzle. The power transmission device includes an injection oil cylinder, an injection base moving oil cylinder and a screw drive device.

For the existing screw type injection molding machine, in the injection molding process, when the plastic particles are heated and plasticized, the heating is mainly performed by a heater installed outside the barrel, so that the plastic particles are in a molten state. External heat conduction leads to uneven heating of the plastic particles near the screw portion. At the same time, the existing heater is installed outside the barrel, and the disassembly and installation process is too cumbersome for daily replacement and maintenance.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide a novel screw heating device for an injection molding machine in view of the existing technical problems.

In order to solve the prior art problem, the technical scheme adopted in the present invention is:

A novel screw heating device for an injection molding machine, including a frame, a hopper, a barrel, a screw, a nozzle and a heating ring for quick disassembly and installation, a first mounting bracket and a support plate are fixedly installed on the frame, and the support plate is close to the first One end of a mounting bracket is fixedly connected with a bushing end cover, a second bearing is installed on the support plate coaxially with the bushing end cover, and the material barrel passes through the first mounting bracket and the bushing end cover and is located in the frame in a horizontal state. Above, the nozzle is threadedly connected to the front end of the barrel, the screw is inserted into the barrel through the second bearing, the screw includes a rod body and a screw groove, the diameter of the rod body gradually increases along the axial direction of the barrel, and the screw groove is always Fitted with the barrel, the screw is provided with a through groove running through the screw along the axis direction, a heating rod is inserted in the through groove, the plug-in end of the heating rod is located outside the end of the screw, and the barrel is located at one of the ends of the screw. Through the feeding port of the barrel wall, the hopper is fixedly connected at the feeding port in a vertical direction, there are two heating rings, and the two heating rings are sleeved on the barrel, and the two heating rings are located close to the feeding port. The front part of the screw.

Preferably, the heating ring includes a first half ring, a second half ring, a round rod and a locking rod, one end of the first plate half ring is rotatably connected with one end of the second half ring, and the first half ring is rotatably connected to one end of the second half ring. The outer wall is fixedly connected with a first flange, the two ends of the first flange are respectively connected with a pressure rod, the other end of the two pressure rods is sleeved with a plastic handle, the round rod runs through the middle part of the two pressure rods, and the lock The tightening rod is U-shaped, the two ends of the locking rod pass through the round rod on the two sides of the two pressure rods, the two ends of the locking rod are locked on the round rod by a plurality of nuts, and the second half ring is fixed on Two hooks symmetrically distributed along the first flange are connected, and when the first half-circle and the second half-circle are in a locked state, the locking rod is hung on the two hooks.

Preferably, a socket is installed on both the first half ring and the second half ring, heating wires are evenly distributed inside the first half ring and the second half ring, and the heating wires are electrically connected to the socket.

Preferably, the first half-circle and the second half-circle are both made of cast aluminum.

Preferably, the diameter of the heating rod is smaller than the diameter of the through groove in the screw, both ends of the heating rod are sleeved with a first bearing, and both ends of the screw are provided with slots for accommodating the first bearing, and the wiring of the heating rod is provided with a slot hole for accommodating the first bearing. One side of the end is fixedly provided with a second bracket, and one end of the second bracket close to the heating rod is fixedly connected with a stopper.

Preferably, the slotted hole at the front end of the screw rod is internally threaded with an end cap, the top end of the end cap is flush with the front end of the screw rod, and the bottom end of the end cap abuts on the first bearing at the bottom end of the slotted hole.

Preferably, a protective cover is placed above the rack, the protective cover is in the shape of a semi-circular arc, and the protective cover is covered on the two heating rings.

Preferably, a man-machine interaction system is fixed on the rack, an alarm light is fixedly installed on the upper end of the man-machine interaction system, and the alarm light is electrically connected with the man-machine interaction system.

Preferably, the end of the screw rod is connected with a rotary drive assembly, the rotary drive assembly includes a gear box, a first gear, a second gear and a rotary driver, a ring groove is opened on the screw rod, and a ring sleeve on the screw rod is fastened by the first gear. In the groove, the second gear meshes with the first gear, the first gear and the second gear are both in the gear box, the end of the screw rod continues to extend outward through the gear box, and the rotary driver is tightly connected with the second gear.

Preferably, a linear propulsion assembly for driving the linear motion of the screw rod is fixedly arranged between the rotary drive assembly and the frame, the linear propulsion assembly is a double-screw sliding table mechanism, and both the gear box and the rotary driver are fixedly installed on the sliding table.

Preferably, a guard rail is also fixedly installed at the hopper above the frame. The guard rail includes a foot, a bottom plate and a guard rail. The foot is fixedly installed on the frame, and the bottom plate is fixed above the foot. The installation port of the hopper, the guardrail is fixedly connected above the bottom plate, and the guardrail surrounds the bottom plate.

The beneficial effects of the present application compared to the prior art are:

1. The application is provided with a rack, a hopper, a barrel, a screw and a heating ring that is convenient for quick disassembly and installation, the first mounting bracket and the support plate are fixedly installed on the rack, and the barrel passes through the first mounting bracket and the support plate. It is located above the frame in a horizontal state, and the screw is inserted into the barrel. The screw includes a rod body and a screw groove. The diameter of the rod body gradually increases along the axial direction of the barrel, and the screw groove always fits the barrel. The screw is provided with a through groove running through the screw along the axis direction, and a heating rod is inserted in the through groove. The plug-in end of the heating rod is located outside the end of the screw. The material inlet, the hopper is fixedly connected to the material inlet in a vertical direction, there are two heating rings, and the two heating rings are both sleeved on the barrel, and the two heating rings are located near the front end of the screw. When the particles enter the barrel from the hopper through the feeding port, the rotation of the screw can make the plastic particles go to the front end of the screw driven by the screw groove. The space between the groove and the barrel is gradually reduced, the friction and extrusion between the screw and the inner wall of the barrel received by the plastic particles are increasing, and the temperature of the plastic particles also rises to a certain extent due to friction and extrusion, making the plastic particles The particles have a preliminary preheating process. When the plastic particles are transferred to the front end of the screw, the heat is transferred from the barrel to the plastic particles through the heating of the heating ring to melt the plastic particles. The plastic particles of the screw can also be melted by heat, thus solving the problem of uneven heating of the plastic particles.

2. In this application, the heating ring is provided with a first half ring, a second half ring, a round rod and a locking rod, and one end of the first plate half ring is rotatably connected with one end of the second half ring, and the first The outer wall of the semi-circular ring is fixedly connected with a first flange, two ends of the first flange are respectively connected with a pressure rod, the other end of the two pressure rods is sleeved with a plastic handle, and the round rod penetrates the two pressure rods. In the middle part, the locking rod is U-shaped, the two ends of the locking rod pass through the round rod on both sides of the two pressing rods, and the two ends of the locking rod are locked on the round rod by a plurality of nuts, and the second half Two hooks symmetrically distributed along the first flange are fixedly connected to the ring. When the first half ring and the second half ring are locked, the locking rod is hung on the two hooks. When installing the heating ring, first Wrap the first half ring and the second half ring on the outside of the barrel, hold the plastic handle and hang the locking rod on the two hooks, and then press the plastic handle down to a certain extent, the locking rod is fastened. Hang it in the hook to lock the first half ring and the second half ring. When the heating ring needs to be disassembled, hold the plastic handle and pull it upwards to release the locking rod from the hook. , the heating ring can be easily removed, and the heating ring can be quickly disassembled and installed.

3. In the present application, the first half ring and the second half ring are made of cast aluminum material, which can enhance the thermal conductivity of the heating ring, so that the heat can be well transferred into the barrel.

4. The diameter of the heating rod of the present application is smaller than the diameter of the through groove in the screw, both ends of the heating rod are sleeved with a first bearing, and both ends of the screw are provided with slot holes for accommodating the first bearing. One side of the terminal is fixed with a second bracket, and one end of the second bracket close to the heating rod is fixedly connected with a stopper. After the heating rod is assembled in place, due to the support of the first bearing, the heating rod and the screw pass through the first bearing. Rotating connection, the heating rod is clamped by the block to catch its terminal, which can ensure that when the screw rotates, the heating rod is still fixed, preventing the wire of the heating rod from being entangled.

5. The application is provided with an end cap, the end cap is threaded in the slotted hole, the bottom end of the end cap abuts the first bearing, and the end cap is blocked, which can not only facilitate the installation of the first bearing, but also effectively prevent melting The plastic particles flow into the channel.

6. In the present application, by setting a protective cover on the heating ring, accidental burns to the staff can be prevented, and a certain thermal insulation effect and dustproof effect can be achieved.

7. In the present application, a rotary drive assembly is connected to the end of the screw rod. The rotary drive assembly includes a gear box, a first gear, a second gear and a rotary driver. The screw rod is provided with a ring groove, and the first gear is fastened. Set on the screw rod. In the ring groove on the top, the second gear meshes with the first gear, the first gear and the second gear are both in the gear box, the end of the screw continues to extend outward through the gear box, and the rotary driver is fastened with the second gear. The rotation of the rotary driver drives the second gear and the first gear to rotate, thereby driving the screw to rotate, and the screw is rotated by means of gear meshing without affecting the wiring of the heating rod terminal at the end of the screw.

Description of drawings

1 is a perspective view of the application;

Fig. 2 is the perspective view of the present application after hiding the rack, the guardrail and the protective cover;

Fig. 3 is the partial enlarged view of the A place of Fig. 2 of the present application;

Fig. 4 is the top view of Fig. 2 of the present application;

Fig. 5 is the cross-sectional view of Fig. 4 of the present application along the B-B section;

Fig. 6 is the partial enlarged view of the C place of Fig. 5 of the present application;

Fig. 7 is a partial enlarged view at D of Fig. 5 of the present application;

8 is a perspective view of the heating ring of the present application;

Figure 9 is an exploded view of the three-dimensional structure of the screw, heating rod and barrel part of the present application;

Fig. 10 is the partial enlarged view of the E place of Fig. 9 of the present application;

Figure 11 is a perspective view of the protective cover of the present application;

Figure 12 is a perspective view of the rotary drive assembly and the linear propulsion assembly of the present application;

Figure 13 is a perspective view of a guardrail of the present application;

The label in the figure is:

1-frame; 1a-first mounting bracket; 1b-support plate; 1b1-second bearing; 1c-shaft sleeve end cover;

2- Hopper;

3-barrel; 3a-feeding port;

4-nozzle;

5-heating ring; 5a-first half-ring; 5a1-first flange; 5b-second half-ring; 5b1-hook; 5c-round rod; 5d-locking rod; 5e-pressing rod; 5f- Plastic handle; 5g-socket;

6-screw; 6a-shaft; 6b-slot; 6c-through slot; 6d-heating rod; 6e-first bearing; 6f-slot hole; 6g-end cap; 6h-ring groove;

7-Second bracket; 7a-Block;

8 - protective cover;

9-human-computer interaction system; 9a-alarm light;

10-rotary drive assembly; 10a-gearbox; 10b-first gear; 10c-rotary drive; 10d-second gear;

11 - Linear propulsion assembly;

12-guardrail; 12a-foot; 12b-bottom; 12c-guardrail.

Detailed ways

In order to further understand the features, technical means, and specific goals and functions of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1-13, this application provides:

A novel screw heating device for an injection molding machine, comprising a frame 1, a hopper 2, a barrel 3, a screw 6, a nozzle 4 and a heating ring 5 for quick disassembly and installation, and a first mounting bracket 1a is fixedly installed on the frame 1 and the support plate 1b, the end of the support plate 1b close to the first mounting bracket 1a is fixedly connected with the bushing end cover 1c, and the support plate 1b is coaxially mounted with the bushing end cover 1c with a second bearing 1b1, through which the barrel 3 passes The first mounting bracket 1a and the bushing end cover 1c are located above the frame 1 in a horizontal state, the nozzle 4 is threadedly connected to the front end of the barrel 3, the screw 6 is inserted into the barrel 3 through the second bearing 1b1, and the screw 6 includes a shaft 6a and a screw groove 6b, the diameter of the shaft 6a gradually increases along the axial direction of the barrel 3, the screw groove 6b is always in contact with the barrel 3, and the screw 6 is provided with a passage through the screw 6 along the axis direction. Slot 6c, a heating rod 6d is inserted in the through groove 6c, the plug-in end of the heating rod 6d is located outside the end of the screw 6, and the barrel 3 is located at the end of the screw 6. There is a feeding port through the wall of the barrel 3. 3a, the hopper 2 is fixedly connected to the feeding port 3a in a vertical direction, there are two heating rings 5, and the two heating rings 5 are both sleeved on the barrel 3, and the two heating rings 5 are located close to the screw 6. front end part.

Based on the above embodiments, the technical problem to be solved by the present application is how to ensure that the plastic particles in the injection molding machine are uniformly heated and melted. To this end, the present application is provided with a rack 1, a hopper 2, a barrel 3, a screw 6 and a heating ring 5 that is convenient for quick disassembly and installation. 3. It is located above the frame 1 through the first mounting bracket 1a and the support plate 1b in a horizontal state. The screw 6 is inserted into the barrel 3. The screw 6 includes a shaft 6a and a screw groove 6b. The feeding barrel 3 is gradually increased in the axial direction, the screw groove 6b is always in contact with the barrel 3, the screw 6 is provided with a through groove 6c passing through the screw 6 along the axial direction, and a heating rod 6d is inserted in the through groove 6c. The plug-in end of 6d is located outside the end of the screw 6, the barrel 3 is located at the end of the screw 6, and a feeding port 3a is opened through the wall of the barrel 3, and the hopper 2 is fixedly connected to the feeding port 3a in a vertical direction. There are two heating rings 5, and the two heating rings 5 are both sleeved on the barrel 3, and the two heating rings 5 are located near the front end of the screw 6. When the plastic particles enter from the hopper 2 through the feeding port 3a When entering the barrel 3, through the rotation of the screw 6, the plastic particles can be driven to the front end of the screw 6 under the driving of the screw groove 6b. During the advancing process of the plastic particles, the diameter of the shaft 6a of the screw 6 The space between the plastic particles and the barrel 3 gradually decreases, the friction and extrusion between the screw 6 received by the plastic particles and the inner wall of the barrel 3 become larger and larger, and the temperature of the plastic particles also rises to a certain extent due to the friction and extrusion. The plastic particles have a preliminary preheating process. When the plastic particles are transferred to the front end of the screw 6, the heat is transferred from the barrel 3 to the plastic particles through the heating of the heating ring 5 to melt the plastic particles. The heating rod 6d can make the plastic particles close to the screw 6 also melted by heat, thereby solving the problem of uneven heating of the plastic particles.

Further, as shown in Figure 8:

The heating ring 5 includes a first half ring 5a, a second half ring 5b, a round rod 5c and a locking rod 5d. One end of the first plate half ring is rotatably connected to one end of the second half ring 5b. The outer wall of the ring 5a is fixedly connected with a first flange 5a1, the two ends of the first flange 5a1 are respectively connected with a pressure rod 5e in rotation, and the other ends of the two pressure rods 5e are sleeved with a plastic handle 5f, and the round rod 5c Passing through the middle part of the two pressing rods 5e, the locking rod 5d is U-shaped, the two ends of the locking rod 5d pass through the round rod 5c on both sides of the two pressing rods 5e respectively, and the two ends of the locking rod 5d pass through a plurality of A nut is locked on the round rod 5c, and two hooks 5b1 symmetrically distributed along the first flange 5a1 are fixedly connected to the second half ring 5b. The first half ring 5a and the second half ring 5b are in a locked state , the locking rod 5d hangs on the two hooks 5b1.

Based on the above embodiments, the technical problem to be solved by this application is how to quickly disassemble and install the heating ring 5 . To this end, in the present application, the heating ring 5 is provided with a first half ring 5a, a second half ring 5b, a round rod 5c and a locking rod 5d, and one end of the first plate half ring 5b is connected to the second half ring 5b. The outer wall of the first half ring 5a is fixedly connected with a first flange 5a1, the two ends of the first flange 5a1 are respectively connected with a pressure rod 5e in rotation, and the other ends of the two pressure rods 5e are sleeved with A plastic handle 5f, the round rod 5c penetrates the middle part of the two pressing rods 5e, the locking rod 5d is U-shaped, and the two ends of the locking rod 5d pass through the round rod 5c on both sides of the two pressing rods 5e respectively, and the locking rod 5d is in the shape of a U. Both ends of the tightening rod 5d are locked on the round rod 5c through a plurality of nuts, and two hooks 5b1 symmetrically distributed along the first flange 5a1 are fixedly connected to the second half ring 5b. When the two half rings 5b are locked, the locking rod 5d is hung on the two hooks 5b1. When installing the heating ring 5, first wrap the first half ring 5a and the second half ring 5b on the outside of the barrel 3, Hold the plastic handle 5f and hang the locking rod 5d on the two hooks 5b1, and then press down on the plastic handle 5f to a certain extent, the locking rod 5d is tightly hung in the hook 5b1, so that the first half ring 5a and the second half ring 5b are locked tightly. When the heating ring 5 needs to be disassembled, hold the plastic handle 5f and pull it upwards to disengage the locking rod 5d from the hook 5b1. Remove the heating ring 5.

Further, as shown in Figure 8:

A socket 5g is installed on the first half ring 5a and the second half ring 5b, and heating wires are evenly distributed inside the first half ring 5a and the second half ring 5b, and the heating wire is electrically connected to the socket 5g .

Based on the above embodiments, the technical problem to be solved by the present application is how to heat the heating ring 5 . To this end, in the present application, a socket 5g is installed on both the first half-circle 5a and the second half-circle 5b, and the inside of the first half-circle 5a and the second half-circle 5b are evenly distributed with electric heating wires. The wire is electrically connected to the socket 5g, and the heating wire can be powered by introducing a power plug and inserted into the socket 5g, thereby generating heat.

Further, as shown in Figure 8:

The first half ring 5a and the second half ring 5b are both made of cast aluminum.

Based on the above embodiment, the present application can enhance the thermal conductivity of the heating ring 5 by making the first semi-circle 5 a and the second semi-circle 5 b made of cast aluminum, so that the heat can be well transferred to the barrel 3 Inside.

Further, as shown in Figure 3-7:

The diameter of the heating rod 6d is smaller than the diameter of the through groove 6c in the screw 6, both ends of the heating rod are sleeved with a first bearing 6e, and both ends of the screw 6 are provided with a slot 6f for accommodating the first bearing 6e. A second bracket 7 is fixedly disposed on one side of the terminal of the heating rod 6d, and a stopper 7a is fixedly connected to one end of the second bracket 7 close to the heating rod 6d.

Based on the above embodiments, the technical problem to be solved by the present application is how to prevent the heating rod 6d from being driven to rotate together when the screw 6 rotates. For this reason, the diameter of the heating rod 6d of the present application is smaller than the diameter of the through groove 6c in the threaded rod, both ends of the heating rod are sleeved with a first bearing 6e, and both ends of the screw 6 are provided with a first bearing 6e for accommodating the first bearing 6e. In the slot hole 6f, a second bracket 7 is fixedly arranged on one side of the terminal of the heating rod 6d, and a stopper 7a is fixedly connected to the end of the second bracket 7 close to the heating rod 6d. After the heating rod 6d is assembled in place, due to the first For the support of the bearing 6e, the heating rod 6d and the screw 6 are connected in rotation through the first bearing 6e, and the heating rod 6d is clamped to its terminal by the stopper 7a, which can ensure that when the screw 6 rotates, the heating rod 6d is still fixed. to prevent the wires of the heating rod 6d from being entangled.

Further, as shown in Figures 5 and 6:

The slot hole 6f at the front end of the screw rod 6 is internally threaded with an end cap 6g, the top end of the end cap 6g is flush with the front end of the screw rod 6, and the bottom end of the end cap 6g abuts on the first bearing 6e at the bottom end of the slot hole 6f.

Based on the above embodiments, the technical problem to be solved by the present application is that the melted plastic particles will flow into the through grooves 6c through the groove holes 6f. To this end, the present application is provided with an end cap 6g, the end cap 6g is screwed into the slot 6f, the bottom end of the end cap 6g abuts against the first bearing 6e, and is blocked by the end cap 6g, which can facilitate the installation of the first bearing 6g. The bearing 6e also effectively prevents molten plastic particles from flowing into the through groove 6c.

Further, as shown in Figures 1, 2, and 11:

A protective cover 8 is placed above the frame 1 , the protective cover 8 is semi-circular arc shape, and the protective cover 8 covers the two heating rings 5 .

Based on the above-mentioned embodiment, by setting the protective cover 8 to cover the heating ring 5 in the present application, accidental burns to the staff can be prevented, and a certain thermal insulation effect and dustproof effect can be achieved.

Further, as shown in Figure 1:

A man-machine interaction system 9 is fixed on the rack 1 , and an alarm light 9 a is fixedly installed on the upper end of the man-machine interaction system 9 , and the alarm light 9 a is electrically connected to the man-machine interaction system 9 .

Based on the above-mentioned embodiment, the present application adopts a man-machine interaction system 9 fixedly installed on the rack 1, an alarm light 9a is fixedly installed on the upper end of the man-machine interaction system 9, and the alarm light 9a is electrically connected with the man-machine interaction system 9, The interactive system 9 can learn the working status of the heating ring 5 and the heating rod 6d, and the warning light 9a can issue an alarm when a dangerous situation occurs in the equipment.

Further, as shown in Figures 1, 5, 7, 9, and 12:

The end of the screw 6 is connected with a rotary drive assembly 10. The rotary drive assembly 10 includes a gear box 10a, a first gear 10b, a second gear 10d and a rotary driver 10c. The screw 6 is provided with a ring groove 6h, and the first gear 10b is fastened. Set in the ring groove 6h on the screw 6, the second gear 10d meshes with the first gear 10b, the first gear 10b and the second gear 10d are both in the gear box 10a, the end of the screw 6 goes through the gear box 10a and continues outward Extending, the rotary drive 10c is fastened to the second gear 10d.

Based on the above embodiment, the present application is connected with a rotary drive assembly 10 at the end of the screw 6. The rotary drive assembly 10 includes a gear box 10a, a first gear 10b, a second gear 10d and a rotary driver 10c, and the screw 6 is provided with a ring groove. 6h, the first gear 10b is fastened and sleeved in the ring groove 6h on the screw 6, the second gear 10d meshes with the first gear 10b, the first gear 10b and the second gear 10d are both in the gear box 10a, the screw 6 The end of the gear box 10a continues to extend outward, and the rotary driver 10c is tightly connected with the second gear 10d. The rotation of the screw 6 will not affect the wiring of the terminal of the heating rod 6d at the end of the screw 6.

Further, as shown in Figures 1 and 12:

Between the rotary drive assembly 10 and the frame 1, a linear propulsion assembly 11 for driving the linear motion of the screw 6 is fixedly arranged. The linear propulsion assembly 11 is a double-screw sliding table mechanism, and the gearbox 10a and the rotary driver 10c are both fixedly installed on the sliding table. .

Based on the above embodiments, the technical problem to be solved by the present application is how the screw 6 pushes the molten plastic particles in the barrel 3 to flow out from the nozzle 4 . To this end, in the present application, a linear propulsion assembly 11 for driving the screw 6 to move linearly is fixedly arranged between the rotary drive assembly 10 and the frame 1. The linear propulsion assembly 11 is a double-screw sliding table mechanism, a gearbox 10a and a rotary drive 10c They are fixedly installed on the sliding table. When the linear propulsion assembly 11 drives the rotary drive assembly 10 to move, since the first gear 10b is fixedly connected with the screw rod 6 , the screw rod 6 also moves with the rotary drive assembly 10 .

Further, as shown in Figures 1 and 13:

A guardrail 12 is also fixedly installed above the frame 1 at the hopper 2. The guardrail 12 includes a foot 12a, a bottom plate 12b and a guardrail 12c. Above, the bottom plate 12b is provided with an installation opening for installing the hopper 2, the guardrail 12c is fixedly connected above the bottom plate 12b, and the guardrail 12c surrounds the bottom plate 12b.

Based on the above-mentioned embodiment, by setting the guardrail 12 in the present application, when the hopper 2 needs to be charged, the staff can stand on the bottom plate 12b to facilitate feeding, and the guardrail 12c can prevent the staff from falling.

The above examples only represent one or several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (10)

1. A novel screw heating device for an injection molding machine, comprising a frame (1), characterized in that it also includes a hopper (2), a barrel (3), a screw (6), a nozzle (4) and is convenient for quick disassembly and installation. The heating ring (5) is fixedly mounted on the frame (1) with a first mounting bracket (1a) and a support plate (1b), and the end of the support plate (1b) close to the first mounting bracket (1a) is fixedly connected with a shaft sleeve The end cover (1c), a second bearing (1b1) is mounted on the support plate (1b), the second bearing (1b1) is coaxial with the shaft sleeve end cover (1c), and the material barrel (3) passes through the first mounting bracket ( 1a) and the sleeve end cover (1c) are horizontally located above the frame (1), the nozzle (4) is threadedly connected to the front end of the barrel (3), and the screw (6) passes through the second bearing (1b1) Inserted into the barrel (3), the screw (6) includes a shaft (6a) and a screw groove (6b), the diameter of the shaft (6a) gradually increases along the axial direction of the barrel (3), and the screw groove (6b) is always in contact with the barrel (3), the screw (6) is provided with a through groove (6c) passing through the screw (6) along the axis direction, and a heating rod (6d) is inserted in the through groove (6c), The plug-in end of the heating rod (6d) is located outside the end of the screw (6), and the barrel (3) is located at the end of the screw (6) with a feeding port (3a) penetrating the barrel wall of the barrel (3), The hopper (2) is fixedly connected at the feeding port (3a) in a vertical direction, there are two heating rings (5), and the two heating rings (5) are sleeved on the barrel (3), and the two heating rings (5) are The heating rings (5) are all located near the front end portion of the screw (6). 2. A novel injection molding machine screw heating device according to claim 1, wherein the heating ring (5) comprises a first half ring (5a), a second half ring (5b), a round rod (5c) ) and the locking rod (5d), one end of the first plate half ring (5b) is rotatably connected with one end of the second half ring (5b), and the outer wall of the first half ring (5a) is fixedly connected with a first flange (5a1 ), the two ends of the first flange (5a1) are respectively connected with a pressure rod (5e) in rotation, the other ends of the two pressure rods (5e) are sleeved with a plastic handle (5f), and the round rod (5c) penetrates through the two pressure rods (5e). The middle part of the two pressing rods (5e), the locking rod (5d) is U-shaped, the two ends of the locking rod (5d) pass through the round rods (5c) on both sides of the two pressing rods (5e) respectively, and the locking rod (5d) Both ends of the tightening rod (5d) are locked on the round rod (5c) through a plurality of nuts, and two hooks (5b1) symmetrically distributed along the first flange (5a1) are fixedly connected to the second half ring (5b). ), when the first half ring (5a) and the second half ring (5b) are locked, the locking rod (5d) hangs on the two hooks (5b1). 3. A new type of screw heating device for injection molding machine according to claim 2, characterized in that, a socket (5g) is installed on the first half ring (5a) and the second half ring (5b), Heating wires are evenly distributed inside the half ring (5a) and the second half ring (5b), and the heating wires are electrically connected to the socket (5g). 4 . The novel screw heating device of an injection molding machine according to claim 3 , wherein the first half ring ( 5 a ) and the second half ring ( 5 b ) are made of cast aluminum. 5 . 5. A novel injection molding machine screw heating device according to claim 1, characterized in that the diameter of the heating rod (6d) is smaller than the diameter of the through groove (6c) in the screw (6), and both ends of the heating rod are sleeved A first bearing (6e) is provided, both ends of the screw (6) are provided with slot holes (6f) for accommodating the first bearing (6e), and a first bearing (6d) is fixedly arranged on one side of the terminal of the heating rod (6d). Two brackets (7), one end of the second bracket (7) close to the heating rod (6d) is fixedly connected with a stopper (7a). 6. A new type of screw heating device for injection molding machine according to claim 5, characterized in that an end cap (6g) is internally threaded in the slot (6f) at the front end of the screw (6), and the top end of the end cap (6g) Flush with the front end of the screw (6), the bottom end of the end cap (6g) abuts on the first bearing (6e) at the bottom end of the slot hole (6f). 7. A novel screw heating device for an injection molding machine according to claim 1, wherein a protective cover (8) is placed above the frame (1), the protective cover (8) is semi-circular arc shape, and the protective cover (8) Covers the two heating rings (5). 8. A novel screw heating device for an injection molding machine according to claim 1, characterized in that a man-machine interaction system (9) is fixedly installed on the frame (1), and an alarm is fixedly installed on the upper end of the man-machine interaction system (9). The light (9a) and the warning light (9a) are electrically connected with the human-computer interaction system (9). 9. A novel screw heating device for an injection molding machine according to claim 1, characterized in that the end of the screw (6) is connected with a rotary drive assembly (10), and the rotary drive assembly (10) comprises a gear box (10a), The first gear (10b), the second gear (10d) and the rotary driver (10c), the screw (6) is provided with a ring groove (6h), and the first gear (10b) is fastened and sleeved on the screw (6) The second gear (10d) meshes with the first gear (10b) in the ring groove (6h) of the first gear (10b), the first gear (10b) and the second gear (10d) are fixedly arranged in the gear box (10a), and the screw (6) ) continues to extend outward through the gear box (10a), and the rotary driver (10c) is drive-connected with the second gear (10d). 10. A novel screw heating device for an injection molding machine according to claim 9, characterized in that a linear propulsion assembly for driving the screw (6) to move linearly is fixedly arranged between the rotary drive assembly (10) and the frame (1). (11), the linear propulsion assembly (11) is a double-screw sliding table structure, and both the gear box (10a) and the rotary driver (10c) are fixedly installed on the sliding table.

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