Discharging opening temperature control structure and injection molding machine
By combining an isolation groove and a cooling water channel on the back of the barrel to the feed port, the problem of heat transfer from the barrel to the injection unit is solved, achieving efficient cooling of the injection molding machine and simplifying the water channel layout, thereby improving the plasticizing effect and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-03-31
AI Technical Summary
In existing injection molding machines, it is difficult to set up cooling channels on the side of the barrel facing the feed port. This causes heat to be transferred to the injection unit, resulting in an increase in the feed port temperature. The plastic raw material melts and clumps prematurely, and the complex layout of the cooling channels increases production costs.
An isolation groove is recessed on the back of the barrel on the side facing the feed inlet to form a heat dissipation gap. Combined with cooling water channels on the left, right and top sides, this ensures that heat cannot be transferred to the injection station while keeping the cooling water channel layout simple.
It effectively avoids the temperature rise at the feed port, prevents the plastic raw material from melting and clumping prematurely, improves the plasticizing efficiency and effect of the injection molding machine, and simplifies the cooling water channel layout, reducing production costs.
Smart Images
Figure CN224060383U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plasticizing structure technology, and in particular to a material outlet temperature control structure and an injection molding machine. Background Technology
[0002] A typical injection molding machine's injection unit mechanism includes an injection unit base and a barrel. The barrel is installed in the mounting hole of the injection unit base. Plastic raw material enters the barrel through the discharge port of the injection unit base, and then, driven by the screw, passes through the heating zone of the barrel. The heating device in this zone melts the raw material, which is then ejected from the nozzle. Proper control of the discharge port temperature is a crucial factor directly affecting the plasticizing efficiency and effect of the injection molding machine. If the discharge port temperature is too high, the plastic raw material will melt and clump prematurely, hindering its movement within the barrel and affecting the normal operation of the injection molding machine.
[0003] In existing technologies, cooling water channels are typically installed inside the injection unit, utilizing the circulating cooling water within these channels to dissipate some of the heat from the injection unit. However, due to processing limitations, it's difficult for the cooling water channels to completely surround the barrel. Specifically, it's challenging to install cooling water channels on the side of the barrel facing away from the feed inlet, allowing heat from the barrel to easily transfer to the injection unit, leading to increased inlet temperature and premature melting and agglomeration of the plastic material. While some manufacturers have managed to place cooling water channels on the side of the barrel facing away from the feed inlet, this results in a complex and numerous network of water channels, complicating the cooling water channel layout and increasing manufacturing costs. Therefore, there is an urgent need for a method that can simplify the cooling water channel layout while preventing heat transfer from the side of the barrel facing away from the feed inlet to the injection unit.
[0004] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content
[0005] The main purpose of this utility model is to propose a material outlet temperature control structure and an injection molding machine, which aims to ensure that heat is difficult to be transferred to the injection unit through the back of the barrel to the side of the material outlet while ensuring a simplified cooling water channel layout.
[0006] To achieve the above objectives, this utility model proposes a discharge port temperature control structure for use in an injection molding machine, wherein the injection molding machine includes an injection unit and a barrel installed in the mounting hole of the injection unit, the injection unit is provided with a discharge port, and the discharge port is connected to the inner cavity of the barrel.
[0007] Specifically, the discharge port temperature control structure includes:
[0008] An isolation groove is recessed in the side wall of the material cylinder on the side opposite to the discharge port, so that there is a heat dissipation gap between the material cylinder and the mounting hole.
[0009] In one embodiment, the material cylinder includes a feed hole that is connected to the discharge port; the isolation groove has an arc-shaped structure, the arc-shaped end of the isolation groove extends to the feed hole, and the arc-shaped end of the isolation groove is not connected to the feed hole.
[0010] In one embodiment, the orthographic projection area of the isolation groove at least partially overlaps with the orthographic projection area of the discharge port.
[0011] In one embodiment, the injection stage is provided with cooling water channels inside, which are located on the left and right sides and the top side of the material cylinder; and the isolation groove is located on the bottom side of the material cylinder.
[0012] In one embodiment, the inlet end of the cooling water channel is connected to an inlet pipe, the outlet end of the cooling water channel is connected to an outlet pipe, and the inlet pipe and the outlet pipe are interconnected with an external water circulation system.
[0013] In one embodiment, the inlet pipe and the outlet pipe are detachably connected to the launch platform.
[0014] In one embodiment, the cooling water channel includes a first water channel, a second water channel, and a third water channel connected in sequence; the first water channel, the second water channel, and the third water channel are all straight, and the first water channel and the third water channel are arranged parallel to each other on the left and right sides of the material cylinder; the second water channel is arranged on the upper side of the material cylinder, and the second water channel is perpendicular to the first water channel and the third water channel.
[0015] In one embodiment, the first end of the third water channel is connected to the end of the second water channel, the middle part of the third water channel is connected to the end of the first water channel, and a sealing member is provided at the second end of the third water channel; the end of the first water channel away from the second water channel is designated as the inlet end of the cooling water channel, and the end of the third water channel away from the second water channel is designated as the outlet end of the cooling water channel.
[0016] In one embodiment, the discharge port has a conical structure, and the end of the discharge port with a relatively small aperture is connected to the inner cavity of the material cylinder.
[0017] To achieve the above objectives, this utility model proposes an injection molding machine, which includes a discharge port temperature control structure as described in any of the above claims.
[0018] The technical solution of this utility model is to provide an isolation groove in the recessed side wall of the material barrel on the side facing the feed inlet, so that there is a heat dissipation gap between the material barrel and the mounting hole. The heat dissipation gap prevents the heat of the heating device from being transferred to the injection stage from this side, and can only dissipate in the heat dissipation gap, so as to avoid the plastic raw material from melting and clumping prematurely due to the temperature rise of the feed inlet. Furthermore, the above technical solution does not involve the layout and processing of the cooling water channel, so it can ensure that heat is difficult to be transferred to the injection stage through the side of the material barrel facing the feed inlet while ensuring the simplification of the cooling water channel layout. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of one embodiment of the discharge port temperature control structure provided by this utility model;
[0021] Figure 2 A second schematic diagram of an embodiment of the discharge port temperature control structure provided by this utility model;
[0022] Figure 3 A schematic diagram of the injection stage base in one embodiment of the discharge port temperature control structure provided by this utility model;
[0023] Figure 4 A schematic diagram of the material cylinder in one embodiment of the material outlet temperature control structure provided by this utility model;
[0024] Figure 5 for Figure 4 A cross-sectional view along direction A.
[0025] Explanation of reference numerals in the attached figures:
[0026] 100. Injection stand; 110. Feed port; 120. Mounting hole; 200. Barrel; 210. Feed inlet; 220. Heating device; 230. Screw; 300. Cooling channel; 310. First channel; 320. Second channel; 321. Sealing component; 330. Third channel; 340. Inlet pipe; 350. Outlet pipe; 400. Isolation tank;
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0030] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0031] In existing technologies, cooling water channels are typically installed inside the injection unit, utilizing the circulating cooling water within these channels to dissipate some of the heat from the injection unit. However, due to processing limitations, it is difficult for the cooling water channels to completely surround the barrel. Specifically, it is challenging to install cooling water channels on the side of the barrel facing away from the feed inlet, allowing heat from the barrel to easily transfer to the injection unit, leading to an increase in the feed inlet temperature and premature melting and agglomeration of the plastic material. While some manufacturers can manage to place the cooling water channels on the side of the barrel facing away from the feed inlet, this results in a complex and numerous branching of the cooling water channels, complicating the cooling water channel layout and increasing manufacturing costs.
[0032] To solve the above-mentioned technical problems, this utility model proposes a temperature control structure for the feeding port.
[0033] Please see Figure 1-2 In one embodiment of the present invention, the discharge port temperature control structure is applied to an injection molding machine, wherein the injection molding machine includes an injection stage 100 and a barrel 200 installed in the mounting hole 120 of the injection stage 100. The injection stage 100 is provided with a discharge port 110, which is connected to the inner cavity of the barrel 200.
[0034] Specifically, the temperature control structure at the discharge port includes:
[0035] An isolation groove 400 is recessed on the side wall of the material cylinder 200 on the side opposite to the material inlet 110, so that there is a heat dissipation gap between the material cylinder 200 and the mounting hole 120.
[0036] The technical solution of this utility model is to provide an isolation groove 400 recessed in the side wall of the material cylinder 200 away from the material outlet 110, so that there is a heat dissipation gap between the material cylinder 200 and the mounting hole 120. The heat dissipation gap prevents the heat of the heating device 220 from being transferred to the injection stage 100 from this side, and can only dissipate in the heat dissipation gap, so as to avoid the plastic raw material from melting and clumping prematurely due to the temperature rise of the material outlet. Furthermore, the above technical solution does not involve the layout and processing of the cooling water channel, so it can ensure that heat is difficult to be transferred to the injection stage 100 through the side of the material cylinder 200 away from the material outlet 110 while ensuring the simplification of the cooling water channel layout.
[0037] Specifically, the barrel 200 includes a feed hole 210, which is connected to the discharge port 110; the isolation groove 400 has an arc-shaped structure, with its arc-shaped end extending to the feed hole 210, but the arc-shaped end of the isolation groove 400 is not connected to the feed hole 210. This arrangement maximizes the area of the isolation groove 400, thereby increasing the heat dissipation gap area to ensure that heat cannot be transferred to the injection stage 100 through the barrel 200.
[0038] Specifically, the projected area of the isolation groove 400 at least partially overlaps with the projected area of the discharge port 110. This arrangement ensures that the distance between the isolation groove 400 and the discharge port 110 is similar, thus preventing the heat from the material cylinder 200 from causing the discharge port 110 to heat up.
[0039] As a preferred embodiment, the injection stage 100 is internally provided with cooling water channels 300, which are located on the left and right sides and the top of the barrel 200; and an isolation groove 400 is located on the bottom of the barrel 200. This arrangement ensures that cooling water channels 300 or isolation grooves 400 are provided on the left and right sides and the top and bottom of the barrel 200, achieving the purpose of combining the cooling water channels 300 and the isolation grooves 400 to surround the barrel 200, thereby ensuring that heat cannot be transferred from the periphery of the barrel 200 to the discharge port 110 of the injection stage 100. Since the barrel 200 has a feed hole 210 on its top side, the isolation groove 400 can only be located on the bottom of the barrel 200. Correspondingly, the cooling water channels 300 need to be located on the left and right sides and the top of the barrel 200. By combining the cooling water channel 300 and the isolation tank 400, the cooling effect at the discharge port 110 can be effectively improved, avoiding the plastic raw material from melting and clumping prematurely at the discharge port 110 due to poor temperature control, thereby improving the plasticizing efficiency and effect of the injection molding machine.
[0040] Specifically, the cooling water channel 300 is located between the discharge port 110 of the injection unit 100 and the heating device 220 of the barrel 200. When the injection molding machine is working, the plastic raw material enters the barrel 200 through the discharge port 110 and is propelled forward by the rotating screw 230 in the barrel 200, and is heated into a molten state by the heating device 220. When the heat from the heating device 220 is transferred along the barrel 200 to the injection unit 100, it is directly carried away by the cooling water circulating in the cooling water channel 300, so as to prevent the plastic raw material at the discharge port 110 from melting and agglomerating prematurely due to temperature influence.
[0041] Furthermore, the inlet end of the cooling water channel 300 is connected to an inlet pipe 340, and the outlet end of the cooling water channel 300 is connected to an outlet pipe 350. The inlet pipe 340 and the outlet pipe 350 are interconnected with an external water circulation system (not shown in the attached diagram). This configuration utilizes the water circulation system to achieve the recycling of cooling water, which is beneficial for energy conservation and environmental protection. Furthermore, the inlet pipe 340 and the outlet pipe 350 are detachably connected to the injection platform 100, thereby facilitating the replacement and maintenance of the inlet pipe 340 and the outlet pipe 350.
[0042] Specifically, the cooling water channel 300 includes a first water channel 310, a second water channel 320, and a third water channel 330 connected in sequence. The first water channel 310, the second water channel 320, and the third water channel 330 all adopt a straight structure. The first water channel 310 and the third water channel 330 are arranged parallel to each other on the left and right sides of the material cylinder 200. The second water channel 320 is located on the upper side of the material cylinder 200, and the second water channel 320 is perpendicular to the first water channel 310 and the third water channel 330. This arrangement decomposes the cooling water channel 300 into the first water channel 310, the second water channel 320, and the third water channel 330. Since the first water channel 310, the second water channel 320, and the third water channel 330 all adopt a straight structure, it is convenient to directly process them using tools such as drills during the manufacturing process. The first water channel 310 and the third water channel 330 are arranged in parallel on the left and right sides of the material cylinder 200; the second water channel 320 is arranged on the upper side of the material cylinder 200, and the second water channel 320 is arranged perpendicular to the first water channel 310 and the third water channel 330, so that the first water channel 310, the second water channel 320 and the third water channel 330 are combined to form a U-shaped structure, so as to ensure that the cooling water channel 300 can be arranged on the left and right sides and the upper side of the material cylinder 200.
[0043] More specifically, the first end of the third water channel 330 is connected to the end of the second water channel 320, the middle part of the third water channel 330 is connected to the end of the first water channel 310, and a sealing element 321 is provided at the second end of the third water channel 330; the end of the first water channel 310 away from the second water channel 320 is designated as the inlet end of the cooling water channel 300, and the end of the third water channel 330 away from the second water channel 320 is designated as the outlet end of the cooling water channel 300. This arrangement, by providing a sealing element 321 at the second end of the third water channel 330, prevents cooling water leakage from the second end of the third water channel 330. During operation, cooling water flows sequentially through the inlet pipe 340 through the first water channel 310, the second water channel 320, and the third water channel 330, and finally flows out from the outlet pipe 350; during the flow process, the cooling water directly carries away the heat at the discharge port 110.
[0044] As a preferred embodiment of the above, the discharge port 110 has a conical structure, with the end of the discharge port 110 having a relatively small aperture connected to the inner cavity of the material cylinder 200. This configuration ensures that the plastic raw material can smoothly fall into the inner cavity of the material cylinder 200 below through the conical discharge port 110.
[0045] This embodiment also discloses an injection molding machine, including the discharge port temperature control structure of any of the above embodiments. The specific structure of the discharge port temperature control structure can be found in the above embodiments. Since this injection molding machine adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.
[0046] It should be noted that the discharge port temperature control structure and other contents of the injection molding machine disclosed in this utility model are existing technologies and will not be described in detail here.
[0047] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.
Claims
1. A nozzle temperature control structure applied to an injection molding machine, wherein the injection molding machine comprises a nozzle seat and a barrel mounted to a mounting hole of the nozzle seat, the nozzle seat is provided with a nozzle, and the nozzle is in communication with an inner cavity of the barrel. characterized in that The nozzle temperature control structure comprises: An isolation groove is concavely arranged in a side wall of the barrel on a side away from the nozzle, so that a heat dissipation gap is formed between the barrel and the mounting hole.
2. The blanking opening temperature control structure according to claim 1, characterized by: The barrel comprises a feeding hole, and the feeding hole is in communication with the nozzle; the isolation groove has an arc structure, an arc end of the isolation groove extends to the feeding hole, and the arc end of the isolation groove is not in communication with the feeding hole.
3. The blanking opening temperature control structure according to claim 1, characterized by: The projection area of the isolation groove and the projection area of the nozzle at least partially overlap.
4. The blanking opening temperature control structure according to claim 1, characterized by: The nozzle seat is internally provided with a cooling water channel, the cooling water channel is arranged on the left and right sides and the upper side of the barrel; and the isolation groove is arranged on the lower side of the barrel.
5. The blanking opening temperature control structure according to claim 4, characterized by: The water inlet end of the cooling water channel is connected with a water inlet pipe, the water outlet end of the cooling water channel is connected with a water outlet pipe, and the water inlet pipe and the water outlet pipe are in communication with an external water circulation system.
6. The blanking opening temperature control structure according to claim 5, wherein: The water inlet pipe and the water outlet pipe are detachably connected with the nozzle seat.
7. The blanking opening temperature control structure according to claim 5, characterized by: The cooling water channel comprises a first water channel, a second water channel and a third water channel connected in sequence; the first water channel, the second water channel and the third water channel all have a straight line structure, the first water channel and the third water channel are arranged in parallel on the left and right sides of the barrel; the second water channel is arranged on the upper side of the barrel, and the second water channel is arranged perpendicularly to the first water channel and the third water channel.
8. The blanking opening temperature control structure according to claim 7, characterized by: The first end of the third water channel is in communication with the end of the second water channel, the middle part of the third water channel is in communication with the end of the first water channel, and the second end of the third water channel is provided with a plugging member; one end of the first water channel away from the second water channel is the water inlet end of the cooling water channel, and one end of the third water channel away from the second water channel is the water outlet end of the cooling water channel.
9. The blanking opening temperature control structure according to claim 1, characterized by: The nozzle has a conical structure, and the end of the nozzle with a relatively small hole diameter is in communication with the inner cavity of the barrel.
10. An injection molding machine characterized by: The injection molding machine comprises the nozzle temperature control structure according to any one of claims 1 to 9.