Injection molding system and injection molding method

Abstract

The application belongs to the technical field of plastic processing, and particularly relates to an injection molding system and an injection molding method. The injection molding system comprises an injection molding seat, a piston assembly and an opening and closing assembly. During the process of being opened to closed by the opening and closing assembly, the main injection molding flow channel is heated to be consistent with the temperature of raw materials, and the raw materials flow to the corresponding mold cavity through each auxiliary injection molding flow channel after being blocked by the opening and closing assembly in the main injection molding flow channel, so as to form corresponding injection molded parts in each mold cavity. After the raw materials are just injected into the main injection molding flow channel, the raw materials push the piston assembly to slowly descend, the raw materials can heat the main injection molding flow channel, so that the raw materials at low temperature enter the temporary storage cavity, after the temperature heating of the main injection molding flow channel is completed, the temporary storage cavity is closed, the normal raw materials are injected into the mold cavity through the auxiliary injection molding flow channel, and the problems of appearing of speckle and flaw of the forming mold are overcome. After the injection molding is completed, the raw materials in the temporary storage cavity are pushed out through the main injection molding flow channel, so as to play the roles of cleaning the main injection molding flow channel and the temporary storage cavity.

Description

Technical Field

[0001] This invention belongs to the field of plastic processing technology, specifically relating to equipment for plastic molding, and more particularly to an injection molding system and injection molding method. Background Technology

[0002] When injection molding begins, the raw material just enters the runner. Since the runner is at room temperature while the raw material is at high temperature, the raw material cools down after entering the runner. The cooled raw material then enters the mold cavity, causing blemishes and defects to appear on the mold.

[0003] Therefore, there is an urgent need to develop a new injection molding system and injection molding method to solve the technical problem of mold spots and defects caused by the cooling of raw materials in the initial stage of injection molding.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one injection molding system and injection molding method.

[0006] In a first aspect, embodiments of this disclosure provide an injection molding system, comprising: an injection seat, a piston assembly, and an opening / closing assembly; wherein the injection seat has a main injection flow channel, a temporary storage cavity, a U-shaped cavity, several auxiliary injection flow channels, and several mold cavities; the main injection flow channel and the temporary storage cavity are connected from top to bottom; the U-shaped cavity is located outside the temporary storage cavity and is connected to the temporary storage cavity; each of the auxiliary injection flow channels is connected to the main injection flow channel and is located above the temporary storage cavity; each of the mold cavities is connected to a corresponding auxiliary injection flow channel; the piston assembly is movably disposed within the temporary storage cavity and the main injection flow channel, and the opening / closing assembly is movably disposed within the U-shaped cavity; before injection molding, the piston assembly separates from the opening / closing assembly, the opening / closing assembly swings outward within the U-shaped cavity to open the temporary storage cavity, and the piston assembly pushes upward to... Above each auxiliary injection runner; during injection molding, the raw material pushes the piston assembly downward along the main injection runner and the temporary storage cavity until the piston assembly abuts against the opening and closing assembly and continues to move, so that the opening and closing assembly swings inward in the U-shaped cavity to close the temporary storage cavity; during the process of the temporary storage cavity being opened to closed by the opening and closing assembly, the main injection runner is heated to the same temperature as the raw material, and the raw material, after being blocked by the opening and closing assembly in the main injection runner, flows towards each auxiliary injection runner to the corresponding mold cavity, so as to form the corresponding injection molded part in each mold cavity; and after injection molding is completed, the piston assembly separates from the opening and closing assembly, the opening and closing assembly swings outward in the U-shaped cavity to open the temporary storage cavity, and the piston assembly pushes the residual raw material in the temporary storage cavity upward along the temporary storage cavity and the main injection runner.

[0007] In one alternative embodiment, the auxiliary injection runner is arranged at an angle upward to prevent the material from entering the corresponding mold cavity when the opening and closing assembly is open and to guide the material into the corresponding mold cavity when the opening and closing assembly is closed.

[0008] In one optional embodiment, the piston assembly includes: a piston head, a first spring, and a push rod; the piston head is movably disposed within a temporary storage cavity and a main injection molding channel via the first spring; a limiting boss is provided within the temporary storage cavity; one end of the push rod is connected to the piston head, and the push rod is adapted to extend into a U-shaped cavity through the limiting boss, with the other end of the push rod facing the opening and closing assembly; when the first spring is in a relaxed state or returns to a relaxed state, the first spring supports the piston head above each auxiliary injection molding channel, and the push rod is separated from the opening and closing assembly, which swings outward within the U-shaped cavity to open the temporary storage cavity; after the piston head is compressed by the first spring, the piston head moves downward along the main injection molding channel and the temporary storage cavity until the push rod abuts against the opening and closing assembly and continues to move, so that the opening and closing assembly swings inward within the U-shaped cavity to close the temporary storage cavity.

[0009] In one alternative embodiment, the piston head has a T-shaped cross-section, the first spring abuts against the side bottom surface of the piston head, and the push rod is connected to the bottom surface of the piston head.

[0010] In one optional embodiment, the opening and closing assembly includes: a first opening and closing unit, a second opening and closing unit, and a second spring; the first opening and closing unit and the second opening and closing unit are movably disposed within the U-shaped cavity, and the first opening and closing unit and the second opening and closing unit are symmetrically arranged about the central axis of the U-shaped cavity; the second spring is located within the U-shaped cavity and abuts against the first opening and closing unit and the second opening and closing unit; when the second spring is stretched, the second spring pushes the first opening and closing unit and the second opening and closing unit to swing outward within the U-shaped cavity to open the temporary storage cavity; when the second spring is compressed, the first opening and closing unit and the second opening and closing unit squeeze the second spring to swing inward within the U-shaped cavity to close the temporary storage cavity.

[0011] In one optional embodiment, the first opening and closing unit includes: a first swing rod and a first opening and closing plate; the first swing rod is hinged in the U-shaped cavity, one end of the first swing rod is connected to the first opening and closing plate, and the other end of the first swing rod abuts against a second spring; when the second spring is stretched, the second spring pushes the first swing rod to swing outward in the U-shaped cavity to open the temporary storage cavity; when the second spring is compressed, the first swing rod squeezes the second spring to swing inward in the U-shaped cavity to close the temporary storage cavity.

[0012] In one alternative embodiment, the first swing rod is L-shaped, and the first turning part of the first swing rod is hinged in the U-shaped cavity.

[0013] In one optional embodiment, the second opening and closing unit includes: a second swing rod and a second opening and closing plate; the second swing rod is hinged in the U-shaped cavity, one end of the second swing rod is connected to the second opening and closing plate, and the other end of the second swing rod abuts against the second spring; when the second spring is stretched, the second spring pushes the second swing rod to swing outward in the U-shaped cavity to open the temporary storage cavity; when the second spring is compressed, the second swing rod squeezes the second spring to swing inward in the U-shaped cavity to close the temporary storage cavity.

[0014] In one alternative embodiment, the second swing rod is L-shaped, and the second bend of the second swing rod is hinged within the U-shaped cavity.

[0015] Secondly, this disclosure also provides an injection molding method using the injection molding system described above, comprising: before injection molding, separating the piston assembly from the opening and closing assembly, the opening and closing assembly swinging outward within the U-shaped cavity to open the temporary storage cavity, and the piston assembly pushing upward above each auxiliary injection channel; during injection molding, the raw material pushes the piston assembly downward along the main injection channel and the temporary storage cavity until the piston assembly abuts against the opening and closing assembly and continues to move, so that the opening and closing assembly swings inward within the U-shaped cavity to close the temporary storage cavity; during the process of the temporary storage cavity being opened to closed by the opening and closing assembly, the main injection channel is heated to the same temperature as the raw material, and the raw material, after being blocked by the opening and closing assembly in the main injection channel, flows towards each auxiliary injection channel to the corresponding mold cavity, so as to form the corresponding injection molded part in each mold cavity; and after injection molding is completed, separating the piston assembly from the opening and closing assembly, the opening and closing assembly swinging outward within the U-shaped cavity to open the temporary storage cavity, and the piston assembly pushing the residual raw material in the temporary storage cavity upward along the temporary storage cavity and the main injection channel.

[0016] The beneficial effects of this invention are that by setting a piston assembly in the main injection channel and temporary storage cavity of the injection molding base, after the raw material is injected into the main injection channel, the raw material pushes the piston assembly to slowly descend, and the raw material can heat the main injection channel, so that the cooled raw material enters the temporary storage cavity. After the temperature of the main injection channel is heated, the piston assembly, together with the opening and closing assembly, closes the temporary storage cavity. Normal raw material is injected into the mold cavity through the auxiliary injection channel under the guidance of the opening and closing assembly, which overcomes the problem of blemishes and defects in the molding mold. At the same time, after the injection is completed, the piston assembly can push the raw material in the temporary storage cavity toward the main injection channel, which plays a role in cleaning the main injection channel and the temporary storage cavity.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A structural diagram of an injection molding system provided in an embodiment of this disclosure;

[0021] Figure 2 A cross-sectional view of an injection molding system provided in an embodiment of this disclosure;

[0022] Figure 3 An internal structural diagram of an injection molding system provided in an embodiment of this disclosure;

[0023] Figure 4 A schematic diagram illustrating the closure of a temporary storage cavity according to an embodiment of this disclosure;

[0024] Figure 5 This is a schematic diagram of a temporary storage cavity being opened, provided as an embodiment of the present disclosure.

[0025] In the picture:

[0026] 1. Injection base; 11. Main injection runner; 12. Temporary storage cavity; 121. Limiting boss; 13. U-shaped cavity; 14. Auxiliary injection runner; 15. Mold cavity;

[0027] 2. Piston assembly; 21. Piston head; 211. Side bottom surface; 212. Bottom bottom surface; 22. First spring; 23. Push rod;

[0028] 3. Opening and closing assembly; 31. First opening and closing unit; 311. First swing rod; 311a. First turning part; 312. First opening and closing plate; 32. Second opening and closing unit; 321. Second swing rod; 321a. Second turning part; 322. Second opening and closing plate; 33. Second spring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0031] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0032] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0033] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0034] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0035] Research has found that when the raw material first enters the runner at the start of injection molding, the runner is at room temperature while the raw material is at a high temperature, causing the raw material to cool down after entering the runner. The cooled raw material then enters the mold cavity, resulting in blemishes and defects on the molded surface.

[0036] Based on the above research, this disclosure provides an injection molding system and injection molding method. After the raw material is injected into the main injection channel, the raw material push piston assembly slowly descends, and the raw material can heat the main injection channel, so that the cooled raw material enters the temporary storage cavity. After the temperature of the main injection channel is heated, the temporary storage cavity is closed, and the normal raw material is injected into the mold cavity through the auxiliary injection channel, overcoming the problem of blemishes and defects in the molding mold. At the same time, after the injection is completed, the raw material in the temporary storage cavity is pushed out through the main injection channel, which plays a role in cleaning the main injection channel and the temporary storage cavity.

[0037] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] like Figures 1 to 5As shown, at least one embodiment provides an injection molding system, comprising: an injection base 1, a piston assembly 2, and an opening / closing assembly 3; wherein the injection base 1 has a main injection flow channel 11, a temporary storage cavity 12, a U-shaped cavity 13, a plurality of auxiliary injection flow channels 14, and a plurality of mold cavities 15; the main injection flow channel 11 and the temporary storage cavity 12 are connected from top to bottom; the U-shaped cavity 13 is located outside the temporary storage cavity 12 and is connected to the temporary storage cavity 12; each of the auxiliary injection flow channels 14 is connected to the main injection flow channel 11 and is located above the temporary storage cavity 12; each of the mold cavities 15 is connected to the corresponding auxiliary injection flow channel 14; the piston assembly 2 is movably disposed within the temporary storage cavity 12 and the main injection flow channel 11, and the opening / closing assembly 3 is movably disposed within the U-shaped cavity 13; before injection molding, the piston assembly 2 separates from the opening / closing assembly 3, and the opening / closing assembly 3 swings outward within the U-shaped cavity 13 to open the temporary storage cavity 12, and the piston assembly 2... The piston assembly 2 is pushed upwards to the top of each auxiliary injection channel 14. During injection molding, the raw material pushes the piston assembly 2 downwards along the main injection channel 11 and the temporary storage cavity 12 until the piston assembly 2 abuts against the opening and closing assembly 3 and continues to move, so that the opening and closing assembly 3 swings inwards in the U-shaped cavity 13 to close the temporary storage cavity 12. During the process of the temporary storage cavity 12 being opened to closed by the opening and closing assembly 3, the main injection channel 11 is heated to the same temperature as the raw material, and the raw material flows towards each auxiliary injection channel 14 to the corresponding mold cavity 15 after being blocked by the opening and closing assembly 3 in the main injection channel 11, so as to form the corresponding injection molded part in each mold cavity 15. After injection molding is completed, the piston assembly 2 separates from the opening and closing assembly 3, the opening and closing assembly 3 swings outwards in the U-shaped cavity 13 to open the temporary storage cavity 12, and the piston assembly 2 pushes the residual raw material in the temporary storage cavity 12 upwards along the temporary storage cavity 12 and the main injection channel 11.

[0041] Specifically, the injection molding base 1 consists of a top cover and a base, and the top cover and the base are detachably connected.

[0042] In at least one embodiment, by setting a piston assembly 2 in the main injection channel 11 and the temporary storage cavity 12 of the injection molding base 1, after the raw material is injected into the main injection channel 11, the raw material pushes the piston assembly 2 to slowly descend, and the raw material can heat the main injection channel 11, so that the cooled raw material enters the temporary storage cavity 12. After the temperature of the main injection channel 11 is heated, the piston assembly 2 cooperates with the opening and closing assembly 3 to close the temporary storage cavity 12. Normal raw material is injected into the mold cavity 15 through the auxiliary injection channel 14 under the guidance of the opening and closing assembly 3, which overcomes the problem of blemishes and defects in the molding mold. At the same time, after the injection is completed, the piston assembly 2 can push the raw material in the temporary storage cavity 12 toward the main injection channel 11, which plays a role in cleaning the main injection channel 11 and the temporary storage cavity 12.

[0043] In at least one embodiment, please refer to Figure 2The auxiliary injection channel 14 is arranged obliquely upward to prevent the raw material from entering the corresponding mold cavity 15 when the opening and closing component 3 is open, and to guide the raw material into the corresponding mold cavity 15 when the opening and closing component 3 is closed.

[0044] Specifically, at the start of injection molding, the raw material pushes the piston assembly 2 into the temporary storage cavity 12. Since the raw material needs to heat the main injection channel 11, it cools down during the process of the raw material pushing the piston assembly 2 into the temporary storage cavity 12. The low temperature of the raw material will cause blemishes and defects in the molding mold. Therefore, the low temperature raw material cannot be injected into the mold cavity 15 through the auxiliary injection channel 14. The auxiliary injection channel 14 is set at an angle upward. During this process, the raw material can only flow into the temporary storage cavity 12. After the temporary storage cavity 12 is closed by the opening and closing assembly 3, the low temperature raw material is blocked in the temporary storage cavity 12. The normal raw material in the main injection channel 11 is blocked by the opening and closing assembly 3 and can only flow at an angle upward through the auxiliary injection channel 14 until it flows into the mold cavity 15.

[0045] In at least one embodiment, please refer to Figure 3 The piston assembly 2 includes a piston head 21, a first spring 22, and a push rod 23. The piston head 21 is movably disposed within the temporary storage cavity 12 and the main injection channel 11 via the first spring 22. A limiting boss 121 is provided in the temporary storage cavity 12. One end of the push rod 23 is connected to the piston head 21, and the push rod 23 is adapted to pass through the limiting boss 121 and extend into the U-shaped cavity 13. The other end of the push rod 23 is positioned towards the opening and closing assembly 3. The first spring 22 is in a relaxed state or returns to a relaxed state. In the current state, the first spring 22 supports the piston head 21 above each auxiliary injection channel 14, and the push rod 23 is separated from the opening and closing assembly 3. The opening and closing assembly 3 swings outward in the U-shaped cavity 13 to open the temporary storage cavity 12. After the piston head 21 is squeezed by the force, the first spring 22 causes the piston head 21 to move downward along the main injection channel 11 and the temporary storage cavity 12 until the push rod 23 abuts against the opening and closing assembly 3 and continues to move, so that the opening and closing assembly 3 swings inward in the U-shaped cavity 13 to close the temporary storage cavity 12.

[0046] Specifically, the first spring 22 is in a relaxed state before injection molding, and the first spring 22 returns to a relaxed state after injection molding is completed.

[0047] Specifically, before injection molding, the piston head 21 is supported by the first spring 22. At this time, the push rod 23 does not contact the opening and closing assembly 3. At this time, the piston head 21 is located above each auxiliary injection channel 14, which can play a role in preventing dust.

[0048] Specifically, during the injection molding process, the piston head 21 squeezes the first spring 22 and moves it downward along the main injection flow channel 11 and the temporary storage cavity 12 until the push rod 23 contacts the opening and closing assembly 3 and pushes the opening and closing assembly 3. Then, the opening and closing assembly 3 swings inward in the U-shaped cavity 13 to close the temporary storage cavity 12.

[0049] Specifically, after injection molding is completed, the first spring 22 pushes the piston head 21 to move upward. At this time, the push rod 23 separates from the opening and closing assembly 3. The opening and closing assembly 3 itself acts elastically in the U-shaped cavity 13 and swings outward to open the temporary storage cavity 12. Then the piston head 21 can push the material in the temporary storage cavity 12 upward.

[0050] Specifically, during the injection molding process, after the temporary storage cavity 12 is closed by the opening and closing component 3, the raw material continuously pushes against the opening and closing component 3, which can exert a downward force on the opening and closing component 3, thus preventing the opening and closing component 3 from opening immediately and ensuring stable injection molding.

[0051] In at least one embodiment, please refer to Figure 4 The piston head 21 has a T-shaped cross-section. The first spring 22 abuts against the side bottom surface 211 of the piston head 21, and the push rod 23 is connected to the bottom surface 212 of the piston head 21, which can avoid interference between the first spring 22 and the push rod 23.

[0052] In at least one embodiment, please refer to Figures 3 to 5 The opening and closing assembly 3 includes: a first opening and closing unit 31, a second opening and closing unit 32, and a second spring 33; the first opening and closing unit 31 and the second opening and closing unit 32 are movably disposed within the U-shaped cavity 13, and the first opening and closing unit 31 and the second opening and closing unit 32 are symmetrically arranged about the central axis of the U-shaped cavity 13; the second spring 33 is located within the U-shaped cavity 13 and abuts against the first opening and closing unit 31 and the second opening and closing unit 32; when the second spring 33 is stretched, the second spring 33 pushes the first opening and closing unit 31 and the second opening and closing unit 32 to swing outward within the U-shaped cavity 13 to open the temporary storage cavity 12; when the second spring 33 is compressed, the first opening and closing unit 31 and the second opening and closing unit 32 squeeze the second spring 33 to swing inward within the U-shaped cavity 13 to close the temporary storage cavity 12.

[0053] Specifically, the first opening and closing unit 31 and the second opening and closing unit 32, together with the second spring 33, can synchronously swing outward in the U-shaped cavity 13 to open the temporary storage cavity 12 or swing inward in the U-shaped cavity 13 to close the temporary storage cavity 12.

[0054] Specifically, before injection molding, the second spring 33 applies an upward force to the first opening and closing unit 31 and the second opening and closing unit 32, which in turn pushes the first opening and closing unit 31 and the second opening and closing unit 32 to swing outward in the U-shaped cavity 13 to open the temporary storage cavity 12.

[0055] Specifically, during the injection molding process, the second spring 33 is indirectly subjected to the downward squeezing force of the push rod 23. Therefore, the push rod 23 pushes the first opening and closing unit 31 and the second opening and closing unit 32 to squeeze the second spring 33. At the same time, the first opening and closing unit 31 and the second opening and closing unit 32 swing inward in the U-shaped cavity 13 to close the temporary storage cavity 12.

[0056] Specifically, during the injection molding process, the push rod 23 removes the force on the first opening and closing unit 31 and the second opening and closing unit 32, and the second spring 33 applies an upward force to the first opening and closing unit 31 and the second opening and closing unit 32 again, thereby pushing the first opening and closing unit 31 and the second opening and closing unit 32 to swing outward in the U-shaped cavity 13 to open the temporary storage cavity 12.

[0057] In at least one embodiment, please refer to Figures 3 to 5 The first opening and closing unit 31 includes: a first swing rod 311 and a first opening and closing plate 312; the first swing rod 311 is hinged in the U-shaped cavity 13, one end of the first swing rod 311 is connected to the first opening and closing plate 312, and the other end of the first swing rod 311 abuts against the second spring 33; when the second spring 33 is stretched, the second spring 33 pushes the first swing rod 311 to swing outward in the U-shaped cavity 13 to open the temporary storage cavity 12; when the second spring 33 is compressed, the first swing rod 311 squeezes the second spring 33 to swing inward in the U-shaped cavity 13 to close the temporary storage cavity 12.

[0058] Specifically, before injection molding, the second spring 33 applies an upward force to the first swing rod 311, which in turn pushes the first swing rod 311 to swing outward in the U-shaped cavity 13, while simultaneously driving the first opening and closing plate 312 to move from the temporary storage cavity 12 into the U-shaped cavity 13, thereby opening the temporary storage cavity 12.

[0059] Specifically, during the injection molding process, the second spring 33 is indirectly subjected to the downward squeezing force of the push rod 23. Therefore, the push rod 23 pushes the first swing rod 311 to squeeze the second spring 33. At the same time, the first swing rod 311 swings inward in the U-shaped cavity 13, and drives the first opening and closing plate 312 to move from the U-shaped cavity 13 to the temporary storage cavity 12, thereby closing the temporary storage cavity 12.

[0060] Specifically, during the injection molding process, the push rod 23 removes the force on the first swing rod 311, and the second spring 33 applies an upward force to the first swing rod 311 again, which in turn pushes the first swing rod 311 to swing outward in the U-shaped cavity 13, while simultaneously driving the first opening and closing plate 312 to move from the temporary storage cavity 12 into the U-shaped cavity 13, thereby opening the temporary storage cavity 12.

[0061] In at least one embodiment, please refer to Figure 4The first swing rod 311 is L-shaped, and the first turning part 311a of the first swing rod 311 is hinged in the U-shaped cavity 13.

[0062] Specifically, the first swing rod 311 swings around the first turning part 311a.

[0063] In at least one embodiment, please refer to Figures 3 to 5 The second opening and closing unit 32 includes: a second swing rod 321 and a second opening and closing plate 322; the second swing rod 321 is hinged in the U-shaped cavity 13, one end of the second swing rod 321 is connected to the second opening and closing plate 322, and the other end of the second swing rod 321 abuts against the second spring 33; when the second spring 33 is stretched, the second spring 33 pushes the second swing rod 321 to swing outward in the U-shaped cavity 13 to open the temporary storage cavity 12; when the second spring 33 is compressed, the second swing rod 321 squeezes the second spring 33 to swing inward in the U-shaped cavity 13 to close the temporary storage cavity 12.

[0064] Specifically, before injection molding, the second spring 33 applies an upward force to the second swing rod 321, which in turn pushes the second swing rod 321 to swing outward in the U-shaped cavity 13, while driving the second opening and closing plate 322 to move from the temporary storage cavity 12 into the U-shaped cavity 13, thereby opening the temporary storage cavity 12.

[0065] Specifically, during the injection molding process, the second spring 33 is indirectly subjected to the downward squeezing force of the push rod 23. Therefore, the push rod 23 pushes the second swing rod 321 to squeeze the second spring 33. At the same time, the second swing rod 321 swings inward in the U-shaped cavity 13, and drives the second opening and closing plate 322 to move from the U-shaped cavity 13 to the temporary storage cavity 12, thereby closing the temporary storage cavity 12.

[0066] Specifically, during the injection molding process, the push rod 23 removes the force on the second swing rod 321, and the second spring 33 applies an upward force to the second swing rod 321 again, which in turn pushes the second swing rod 321 to swing outward in the U-shaped cavity 13, while driving the second opening and closing plate 322 to move from the temporary storage cavity 12 into the U-shaped cavity 13, thereby opening the temporary storage cavity 12.

[0067] Specifically, the first opening and closing plate 312, in conjunction with the second opening and closing plate 322, can open or close the temporary storage cavity 12.

[0068] In at least one embodiment, please refer to Figure 4 The second swing rod 321 is L-shaped, and the second turning part 321a of the second swing rod 321 is hinged in the U-shaped cavity 13.

[0069] Specifically, the second swing rod 321 swings around the second turning part 321a.

[0070] Based on the same technical concept, at least one embodiment also provides an injection molding method using the injection molding system described above, which includes: before injection molding, the piston assembly 2 is separated from the opening and closing assembly 3, the opening and closing assembly 3 swings outward in the U-shaped cavity 13 to open the temporary storage cavity 12, and the piston assembly 2 is pushed upward to the top of each auxiliary injection flow channel 14; during injection molding, the raw material pushes the piston assembly 2 to move downward along the main injection flow channel 11 and the temporary storage cavity 12 until the piston assembly 2 abuts against the opening and closing assembly 3 and continues to move, so that the opening and closing assembly 3 swings inward in the U-shaped cavity 13 to close the temporary storage cavity 12; During the opening and closing process of the temporary storage cavity 12, the main injection channel 11 is heated to the same temperature as the raw material. After being blocked by the opening and closing component 3 in the main injection channel 11, the raw material flows towards each auxiliary injection channel 14 to the corresponding mold cavity 15 to form the corresponding injection molded part in each mold cavity 15. After the injection is completed, the piston assembly 2 separates from the opening and closing component 3. The opening and closing component 3 swings outward in the U-shaped cavity 13 to open the temporary storage cavity 12. The piston assembly 2 pushes the residual raw material in the temporary storage cavity 12 upward along the temporary storage cavity 12 and the main injection channel 11.

[0071] In summary, this invention, by setting a piston assembly within the main injection channel and temporary storage cavity of the injection molding base, allows the raw material to slowly descend against the piston assembly after it is injected into the main injection channel. This process heats the main injection channel, allowing the cooled raw material to enter the temporary storage cavity. Once the main injection channel has been heated to the desired temperature, the piston assembly, in conjunction with the opening and closing assembly, closes the temporary storage cavity. Normally, the raw material is guided by the opening and closing assembly and injected into the mold cavity through the auxiliary injection channel. This overcomes the problem of blemishes and defects in the molding mold. Furthermore, after injection molding is complete, the piston assembly pushes the raw material in the temporary storage cavity towards the main injection channel, effectively cleaning the main injection channel and the temporary storage cavity.

[0072] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0073] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0074] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0075] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0076] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An injection molding system, characterized in that, include: The injection molding base (1), piston assembly (2), and opening / closing assembly (3); among which The injection molding base (1) is provided with a main injection flow channel (11), a temporary storage cavity (12), a U-shaped cavity (13), several auxiliary injection flow channels (14) and several mold cavities (15). The main injection flow channel (11) and the temporary storage cavity (12) are connected from top to bottom. The U-shaped cavity (13) is located outside the temporary storage cavity (12) and is connected to the temporary storage cavity (12). Each of the auxiliary injection flow channels (14) is connected to the main injection flow channel (11) and is located above the temporary storage cavity (12). Each of the mold cavities (15) is connected to the corresponding auxiliary injection flow channel (14). The piston assembly (2) is movably disposed in the temporary storage cavity (12) and the main injection flow channel (11), and the opening and closing assembly (3) is movably disposed in the U-shaped cavity (13); The auxiliary injection channel (14) is arranged at an angle upward to prevent the raw material from entering the corresponding mold cavity (15) when the opening and closing component (3) is open and to guide the raw material into the corresponding mold cavity (15) when the opening and closing component (3) is closed. The piston assembly (2) includes: a piston head (21), a first spring (22), and a push rod (23); The piston head (21) is movably disposed in the temporary storage cavity (12) and the main injection flow channel (11) by means of the first spring (22); The temporary storage cavity (12) is provided with a limiting boss (121), one end of the push rod (23) is connected to the piston head (21), the push rod (23) is adapted to pass through the limiting boss (121) and extend into the U-shaped cavity (13), and the other end of the push rod (23) is set towards the opening and closing assembly (3); When the first spring (22) is in a relaxed state or returns to a relaxed state, the first spring (22) supports the piston head (21) above each auxiliary injection channel (14), and the push rod (23) is separated from the opening and closing assembly (3). The opening and closing assembly (3) swings outward in the U-shaped cavity (13) to open the temporary storage cavity (12). After the first spring (22) is squeezed by the piston head (21), the piston head (21) moves downward along the main injection flow channel (11) and the temporary storage cavity (12) until the push rod (23) abuts against the opening and closing assembly (3) and continues to move, so that the opening and closing assembly (3) swings inward in the U-shaped cavity (13) to close the temporary storage cavity (12); The opening and closing assembly (3) includes: a first opening and closing unit (31), a second opening and closing unit (32), and a second spring (33); The first opening and closing unit (31) and the second opening and closing unit (32) are movably disposed in the U-shaped cavity (13), and the first opening and closing unit (31) and the second opening and closing unit (32) are symmetrically arranged about the central axis of the U-shaped cavity (13); The second spring (33) is located inside the U-shaped cavity (13) and abuts against the first opening and closing unit (31) and the second opening and closing unit (32); When the second spring (33) is stretched, the second spring (33) pushes the first opening and closing unit (31) and the second opening and closing unit (32) to swing outward in the U-shaped cavity (13) to open the temporary storage cavity (12); When the second spring (33) is compressed, the first opening and closing unit (31) and the second opening and closing unit (32) squeeze the second spring (33) to swing inward in the U-shaped cavity (13) and close the temporary storage cavity (12).

2. The injection molding system as described in claim 1, characterized in that, The piston head (21) has a T-shaped cross-section. The first spring (22) abuts against the side bottom surface (211) of the piston head (21), and the push rod (23) is connected to the bottom surface (212) of the piston head (21).

3. The injection molding system as described in claim 1, characterized in that, The first opening and closing unit (31) includes: a first swing rod (311) and a first opening and closing plate (312); The first swing rod (311) is hinged in the U-shaped cavity (13), one end of the first swing rod (311) is connected to the first opening and closing plate (312), and the other end of the first swing rod (311) abuts against the second spring (33); When the second spring (33) is stretched, the second spring (33) pushes the first swing rod (311) to swing outward in the U-shaped cavity (13) to open the temporary storage cavity (12); When the second spring (33) is compressed, the first swing rod (311) squeezes the second spring (33) and swings it inward in the U-shaped cavity (13) to close the temporary storage cavity (12).

4. The injection molding system as described in claim 3, characterized in that, The first swing rod (311) is L-shaped, and the first turning part (311a) of the first swing rod (311) is hinged in the U-shaped cavity (13).

5. The injection molding system as described in claim 1, characterized in that, The second opening and closing unit (32) includes: a second swing rod (321) and a second opening and closing plate (322); The second swing rod (321) is hinged in the U-shaped cavity (13). One end of the second swing rod (321) is connected to the second opening and closing plate (322), and the other end of the second swing rod (321) abuts against the second spring (33). When the second spring (33) is stretched, the second spring (33) pushes the second swing rod (321) to swing outward in the U-shaped cavity (13) to open the temporary storage cavity (12); When the second spring (33) is compressed, the second swing rod (321) squeezes the second spring (33) and swings it inward in the U-shaped cavity (13) to close the temporary storage cavity (12).

6. The injection molding system as described in claim 5, characterized in that, The second swing rod (321) is L-shaped, and the second turning part (321a) of the second swing rod (321) is hinged in the U-shaped cavity (13).

7. An injection molding method using the injection molding system as described in any one of claims 1-6, characterized in that, include: Before injection molding, the piston assembly (2) is separated from the opening and closing assembly (3). The opening and closing assembly (3) swings outward in the U-shaped cavity (13) to open the temporary storage cavity (12), and the piston assembly (2) pushes upward to the top of each auxiliary injection flow channel (14). During the injection molding process, the raw material pushes the piston assembly (2) to move downward along the main injection flow channel (11) and the temporary storage cavity (12) until the piston assembly (2) abuts against the opening and closing assembly (3) and continues to move, so that the opening and closing assembly (3) swings inward in the U-shaped cavity (13) to close the temporary storage cavity (12); During the opening and closing process of the temporary storage cavity (12) by the opening and closing assembly (3), the main injection channel (11) is heated to the same temperature as the raw material, and the raw material, after being blocked by the opening and closing assembly (3) in the main injection channel (11), flows towards each auxiliary injection channel (14) to the corresponding mold cavity (15) to form the corresponding injection molded part in each mold cavity (15); and After injection molding is completed, the piston assembly (2) separates from the opening and closing assembly (3). The opening and closing assembly (3) swings outward in the U-shaped cavity (13) to open the temporary storage cavity (12). The piston assembly (2) pushes the residual material in the temporary storage cavity (12) upward along the temporary storage cavity (12) and the main injection flow channel (11).

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