Injection molding machine for polyurethane processing

Abstract

The utility model relates to an injection molding machine for polyurethane processing, which relates to the technical field of injection molding machines, and comprises a support, a box body, an injection molding mechanism, a feeding mechanism and a mold pressing mechanism, the box body is arranged on the support, the injection molding mechanism and the mold pressing mechanism are both arranged in the box body, the injection molding mechanism is used for filling plastics into the mold pressing mechanism, and the feeding mechanism is used for feeding the plastics into the mold pressing mechanism. The mold pressing mechanism is used for carrying out mold pressing on plastic; the feeding mechanism comprises a feeding hopper, a feeding pipe and a sieve plate, the sieve plate is arranged in the feeding hopper, one end of the feeding pipe is communicated with the feeding hopper, and the other end of the feeding pipe penetrates through the top of the box body to be communicated with the injection molding mechanism. According to the utility model, the sieve plate is arranged in the feeding funnel, so that polyurethane particles with overlarge sizes can be sieved during feeding, and the polyurethane particles are ensured to be fully melted, thereby improving the product quality.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding machines, and in particular to an injection molding machine for polyurethane processing. Background Art

[0002] The injection molding machine is also known as an injection molding machine or an injection machine. It is the main molding equipment for making plastic products of various shapes from thermoplastics or thermosetting plastics using plastic molding molds. It is divided into vertical, horizontal, and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity. At present, the Chinese utility model patent application with a publication date of July 19, 2022 and a publication number of CN216992958U provides an injection molding machine, including a frame, an injection molding assembly, a first mold, a second mold, a drive assembly, a cooling assembly, and a control assembly; the first mold is connected to the injection molding mechanism, and a spiral cooling pipe is surrounded on the outside of the first mold, and the spiral cooling pipe completely covers the outer side of the first mold; the second mold can be slidably connected to the frame; the drive assembly is used to drive the second mold to slide so that the first mold and the second mold are molded together; the cooling assembly includes a coolant storage device and a first water pump, the input end of the coolant storage device is connected to one end of the spiral cooling pipe, and the first water pump is used to drive the coolant to circulate between the spiral cooling pipe and the coolant storage device. By injecting flowing coolant into the spiral cooling pipe, the plastic material between the first mold and the second mold is cooled quickly, the cooling and molding time of the plastic material is reduced, and the processing efficiency is improved.

[0003] The injection molding machine in the related technology may have larger plastic particles due to the different sizes of plastic particles in the plastic particle raw materials. However, larger plastic particles may not melt completely at the same temperature and time. This will cause some of the insufficiently melted plastic particles to clog the nozzle or enter the mold when the injection molding machine is working, making it easier for the injection molding machine to produce defective products and reducing the working efficiency of the injection molding machine. Utility Model Content

[0004] The embodiment of the present application provides an injection molding machine for polyurethane processing, which can improve the technical problem existing in the related art that the plastic particles cannot be fully melted due to the presence of large-sized plastic particles in the raw materials.

[0005] In the first aspect, an embodiment of the present application provides an injection molding machine for polyurethane processing, comprising a bracket, a box, an injection molding mechanism, a feeding mechanism and a compression molding mechanism, wherein the box is arranged on the bracket, and the injection molding mechanism and the compression molding mechanism are both arranged inside the box, the injection molding mechanism is used to inject plastic into the compression molding mechanism, and the compression molding mechanism is used to compression mold the plastic; the feeding mechanism comprises a feeding funnel, a feeding pipe and a sieve plate, and the sieve plate is arranged inside the feeding funnel, one end of the feeding pipe is connected to the feeding funnel, and the other end of the feeding pipe passes through the top of the box and is connected to the injection molding mechanism.

[0006] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: after the polyurethane plastic particles enter the feed funnel, the smaller plastic particles can pass through the filter plate into the feed pipe and further enter the injection molding mechanism, while the larger plastic particles will be blocked by the filter plate and remain inside the feed funnel, thereby ensuring that the plastic particles entering the injection molding mechanism will not be incompletely melted due to their large size, thereby affecting the efficient operation of the injection molding machine.

[0007] An injection molding machine for polyurethane processing provided in an embodiment of the present application can filter out large-sized polyurethane plastic particles that are difficult to melt through a filter plate arranged inside a feeding mechanism, thereby ensuring the efficient operation of the injection molding machine.

[0008] In some embodiments, the feeding mechanism also includes a stirring plate and a first drive motor, the first drive motor is arranged on an end of the feeding funnel away from the feeding pipe, the stirring plate is transmission-connected to the output end of the first drive motor, and the stirring plate abuts against the screen plate.

[0009] In some embodiments, a discharge port is provided on the feed funnel, and a sealing plate is slidably connected to the side wall of the feed funnel.

[0010] In some embodiments, a discharge chute is also provided on the outer peripheral surface of the feed funnel, and the discharge chute is connected to the discharge port.

[0011] In some embodiments, the injection molding mechanism includes a second drive motor, a shell, a heater and a screw conveying rod. The shell is arranged on the inner side of the box body, the heater is sleeved on the outer surface of the shell, the screw conveying rod is arranged inside the shell, and the second drive motor is arranged on the outer side of the box body. The driving part of the second drive motor passes through the box body and the shell and is transmission-connected to one end of the screw conveying rod.

[0012] In some embodiments, the molding mechanism includes a first mold, a second mold, a hydraulic press and an optical axis, the first mold is arranged on the end of the shell away from the second drive motor, the first mold is provided with an injection hole at the end close to the shell, the shell is provided with a nozzle at the end close to the first mold, the shell and the first mold are connected to the injection hole through the nozzle, the optical axis is arranged inside the box, the second mold is slidably connected to the optical axis, the hydraulic press is arranged on the side of the box away from the second drive motor, and the second mold is transmission connected to the output end of the hydraulic press.

[0013] In some embodiments, the first mold also includes a cooling mechanism, which includes a first water pipe, a second water pipe, a third water pipe, a cooling box and a water pump. The water pump is arranged inside the box body, and the cooling box is arranged on the top of the box body. A cooling channel, a water inlet hole and a water outlet hole are opened on the first mold. One end of the first water pipe is connected to the cooling channel through the water inlet hole, and the other end of the first water pipe is connected to the cooling box. One end of the second water pipe is connected to the cooling channel through the water outlet hole, and the other end of the second water pipe is connected to the input end of the water pump. One end of the third water pipe is connected to the output end of the water pump, and the other end of the third water pipe is connected to the cooling box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 The overall structure of an injection molding machine for polyurethane processing provided in an embodiment of the present application is schematically shown. Figure 1 ;

[0016] Figure 2 A schematic diagram of the main structure of an injection molding machine for polyurethane processing provided in an embodiment of the present application;

[0017] Figure 3 A schematic diagram of the overall structure of a feeding mechanism of an injection molding machine for polyurethane processing provided in an embodiment of the present application;

[0018] Figure 4 An injection molding mechanism and a first mold cross-sectional view of an injection molding machine for polyurethane processing provided in an embodiment of the present application;

[0019] Figure 5 An injection molding machine for polyurethane processing provided in an embodiment of the present application Figure 4 A magnified view of part A;

[0020] Figure 6 A schematic diagram of the overall structure of a first mold and a cooling mechanism of an injection molding machine for polyurethane processing provided in an embodiment of the present application.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Bracket; 2. Box body; 31. Second drive motor; 32. Shell; 321. Nozzle; 33. Heater; 34. Screw conveyor rod; 41. Feed hopper; 412. Sealing plate; 413. Discharge chute; 42. Feed pipe; 43. Screen plate; 44. Stirring plate; 45. First drive motor; 51. First mold; 511. Injection hole; 512. Cooling channel; 513. Water inlet hole; 514. Water outlet hole; 52. Second mold; 53. Hydraulic press; 54. Optical axis; 551. First water pipe; 552. Second water pipe; 553. Third water pipe; 554. Cooling box; 555. Water pump. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity.

[0031] The injection molding machine in the related technology may have larger plastic particles due to the different sizes of plastic particles in the plastic particle raw materials. However, larger plastic particles may not melt completely at the same temperature and time. This will cause some of the insufficiently melted plastic particles to clog the nozzle or enter the mold when the injection molding machine is working, making it easier for the injection molding machine to produce defective products and reducing the working efficiency of the injection molding machine.

[0032] Based on this, in order to improve the problems in the related art, the embodiments of the present application provide the following solutions.

[0033] Please also read Figures 1 to 3The embodiment of the present application provides an injection molding machine for polyurethane processing, including a bracket 1, a box body 2, an injection molding mechanism, a feeding mechanism and a compression molding mechanism. The box body 2 is arranged on the bracket 1, and the injection molding mechanism and the compression molding mechanism are both arranged inside the box body 2. The injection molding mechanism is used to add plastic to the compression molding mechanism, and the compression molding mechanism is used to compression mold the plastic; the feeding mechanism includes a feeding funnel 41, a feeding pipe 42 and a sieve plate 43. The sieve plate 43 is arranged inside the feeding funnel 41, one end of the feeding pipe 42 is connected to the feeding funnel 41, and the other end of the feeding pipe 42 passes through the top of the box body 2 and is connected to the injection molding mechanism.

[0034] From the above, it can be seen that when the injection molding machine for polyurethane processing provided by the embodiment of the present application is working, after the polyurethane plastic particles enter the feed funnel 41, the smaller plastic particles can pass through the filter plate into the feed pipe 42 and further enter the injection molding mechanism, while the larger plastic particles will be blocked by the filter plate and remain inside the feed funnel 41, thereby ensuring that the plastic particles entering the injection molding mechanism will not be incompletely melted due to their large size, thereby affecting the efficient operation of the injection molding machine.

[0035] In some embodiments, please refer to Figures 1 to 3 The feeding mechanism also includes a stirring plate 44 and a first driving motor 45. The first driving motor 45 is arranged on an end of the feeding funnel 41 away from the feeding pipe 42. The stirring plate 44 is transmission-connected to the output end of the first driving motor 45, and the stirring plate 44 abuts against the sieve plate 43.

[0036] With such arrangement, when the injection molding machine is working, the polyurethane plastic particles enter the injection molding mechanism through the feeding mechanism, and the large-sized plastic particles will remain in the feed hopper 41 after being filtered by the filter plate. Some of the sieve holes on the filter plate may be blocked by the plastic particles, causing the feeding speed of the feed mechanism to be too slow, thereby affecting the normal operation of the injection molding machine. At this time, the first drive motor 45 can be started to drive the stirring plate 44 to rotate to stir the plastic particles in the feed hopper 41, thereby preventing the sieve plate 43 from being blocked by the plastic particles, thereby ensuring smooth feeding.

[0037] Optionally, in some embodiments, see Figures 1 to 3 A discharge port is provided on the feed funnel 41 , and a sealing plate 412 is slidably connected to the side wall of the feed funnel 41 .

[0038] With such arrangement, after the injection molding machine has been working for a long time, a large number of large-sized plastic particles will remain in the feed funnel 41, and these plastic particles will accumulate above the sieve plate 43, making it impossible for the plastic particles above to pass through the sieve plate 43 smoothly. At this time, the sealing plate 412 on the feed funnel 41 can be opened to clean out the plastic particles accumulated in the feed funnel 41 to ensure the working efficiency of the injection molding machine.

[0039] Optionally, see Figures 1 to 3A discharge chute 413 is also provided on the outer peripheral surface of the feed funnel 41, and the discharge chute 413 is connected to the discharge port.

[0040] With such arrangement, when cleaning the plastic particles accumulated inside the feed hopper 41 , the plastic particles flowing out of the discharge port can flow along the discharge chute 413 , so that the cleaned plastic particles can be collected more conveniently.

[0041] In some embodiments, see Figures 1 to 4 The injection molding mechanism includes a second drive motor 31, a shell 32, a heater 33 and a screw conveying rod 34. The shell 32 is arranged on the inner side of the box body 2, the heater 33 is sleeved on the outer surface of the shell 32, the screw conveying rod 34 is arranged inside the shell 32, and the second drive motor 31 is arranged on the outer side of the box body 2. The driving part of the second drive motor 31 passes through the box body 2 and the shell 32 and is transmission-connected to one end of the screw conveying rod 34.

[0042] With such arrangement, after the polyurethane plastic particles enter the interior of the shell 32 through the feeding mechanism, the second drive motor 31 drives the screw conveying rod 34 to convey the plastic particles forward. During the conveying process of the plastic particles, the heater 33 heats the shell 32, and the plastic particles inside the shell 32 are gradually melted and then conveyed to the molding mechanism by the screw conveying rod 34.

[0043] Optionally, in some embodiments, see Figures 1 to 4 The die pressing mechanism includes a first mold 51, a second mold 52, a hydraulic press 53 and an optical axis 54. The first mold 51 is arranged on the end of the shell 32 away from the second drive motor 31. An injection hole 511 is provided at the end of the first mold 51 close to the shell 32. A nozzle 321 is provided at the end of the shell 32 close to the first mold 51. The shell 32 and the first mold 51 are connected to the injection hole 511 through the nozzle 321. The optical axis 54 is arranged inside the box body 2. The second mold 52 is slidably connected to the optical axis 54. The hydraulic press 53 is arranged on the side of the inside of the box body 2 away from the second drive motor 31. The second mold 52 is transmission-connected to the output end of the hydraulic press 53.

[0044] With such arrangement, the hydraulic press 53 pushes the second mold 52 toward the first mold 51 along the polished rod, and makes the first mold 51 and the second mold 52 fit tightly together. At this time, the molten polyurethane plastic particles inside the shell 32 enter through the nozzle 321 and the injection hole 511 under the action of the spiral conveying rod 34 and fill the cavity formed by the first mold 51 and the second mold 52.

[0045] Optionally, see Figures 1 to 5The first mold 51 also includes a cooling mechanism, which includes a first water pipe 551, a second water pipe 552, a third water pipe 553, a cooling box 554 and a water pump 555. The water pump 555 is arranged inside the box body 2, and the cooling box 554 is arranged on the top of the box body 2. A cooling channel 512, a water inlet hole 513 and a water outlet hole 514 are opened on the first mold 51. One end of the first water pipe 551 is connected to the cooling channel 512 through the water inlet hole 513, and the other end of the first water pipe 551 is connected to the cooling box 554. One end of the second water pipe 552 is connected to the cooling channel 512 through the water outlet hole 514, and the other end of the second water pipe 552 is connected to the input end of the water pump 555. One end of the third water pipe 553 is connected to the output end of the water pump 555, and the other end of the third water pipe 553 is connected to the cooling box 554.

[0046] With such arrangement, after the molten polyurethane plastic particles fill the cavity formed by the die-casting mechanism, the cooling channel 512 and the coolant inside the cooling mechanism continuously circulate under the action of the water pump 555. When the coolant passes through the cooling channel 512, it continuously takes away the heat of the first mold 51, so that the first mold 51 is cooled, ensuring that the molten polyurethane material inside the die-casting mechanism can be quickly cooled and solidified; the cooling box 554 can increase the contact area between the cooling pipe and the air, so that the coolant can be cooled faster, thereby ensuring the working efficiency of the cooling mechanism.

[0047] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An injection molding machine for polyurethane processing, characterized in that: The invention comprises a support (1), a box (2), an injection molding mechanism, a feeding mechanism and a compression molding mechanism, wherein the box (2) is arranged on the support (1), the injection molding mechanism and the compression molding mechanism are both arranged inside the box (2), the injection molding mechanism is used to inject plastic into the compression molding mechanism, and the compression molding mechanism is used to compression mold the plastic; the feeding mechanism comprises a feeding hopper (41), a feeding pipe (42) and a sieve plate (43), the sieve plate (43) is arranged inside the feeding hopper (41), one end of the feeding pipe (42) is connected to the feeding hopper (41), and the other end of the feeding pipe (42) passes through the top of the box (2) and is connected to the injection molding mechanism.

2. An injection molding machine for polyurethane processing according to claim 1, characterized in that: The feeding mechanism also includes a stirring plate (44) and a first driving motor (45), wherein the first driving motor (45) is arranged on an end of the feeding hopper (41) away from the feeding pipe (42), the stirring plate (44) is transmission-connected to the output end of the first driving motor (45), and the stirring plate (44) is in contact with the sieve plate (43).

3. An injection molding machine for polyurethane processing according to claim 1, characterized in that: The feed funnel (41) is provided with a discharge port, and a sealing plate (412) is slidably connected to the side wall of the feed funnel (41).

4. An injection molding machine for polyurethane processing according to claim 3, characterized in that: A discharge chute (413) is also provided on the outer peripheral surface of the feed funnel (41), and the discharge chute (413) is communicated with the discharge port.

5. An injection molding machine for polyurethane processing according to claim 4, characterized in that: The injection molding mechanism comprises a second drive motor (31), a shell (32), a heater (33) and a screw conveying rod (34); the shell (32) is arranged on the inner side surface of the box body (2); the heater (33) is sleeved on the outer surface of the shell (32); the screw conveying rod (34) is arranged inside the shell (32); the second drive motor (31) is arranged on the outer side surface of the box body (2); and the drive part of the second drive motor (31) passes through the box body (2) and the shell (32) and is transmission-connected to one end of the screw conveying rod (34).

6. An injection molding machine for polyurethane processing according to claim 5, characterized in that: The die pressing mechanism comprises a first die (51), a second die (52), a hydraulic press (53) and an optical axis (54); the first die (51) is arranged on an end of the housing (32) away from the second drive motor (31); an injection hole (511) is provided on an end of the first die (51) close to the housing (32); a nozzle (321) is provided on an end of the housing (32) close to the first die (51); the housing (32) and the first die (51) are connected to the injection hole (511) via the nozzle (321); the optical axis (54) is arranged inside the housing (2); the second die (52) is slidably connected to the optical axis (54); the hydraulic press (53) is arranged on a surface of the housing (2) away from the second drive motor (31); and the second die (52) is transmission-connected to an output end of the hydraulic press (53).

7. An injection molding machine for polyurethane processing according to claim 6, characterized in that: The first mold (51) further comprises a cooling mechanism, the cooling mechanism comprising a first water pipe (551), a second water pipe (552), a third water pipe (553), a cooling box (554) and a water pump (555), the water pump (555) being arranged inside the box body (2), the cooling box (554) being arranged on the top of the box body (2), the first mold (51) being provided with a cooling channel (512), a water inlet hole (513) and a water outlet hole (514), one end of the first water pipe (551) The first water pipe (551) is connected to the cooling channel (512) through the water inlet hole (513), the other end of the first water pipe (551) is connected to the cooling box (554), one end of the second water pipe (552) is connected to the cooling channel (512) through the water outlet hole (514), the other end of the second water pipe (552) is connected to the input end of the water pump (555), one end of the third water pipe (553) is connected to the output end of the water pump (555), and the other end of the third water pipe (553) is connected to the cooling box (554).

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