Mold structure for injection molding of ring-shaped thin-walled products and injection molding machine

Abstract

This invention provides a ring-shaped thin-walled injection mold structure and an injection molding machine, relating to the technical field of injection molds. The ring-shaped thin-walled injection mold structure includes a fixed mold part, a moving mold part, an ejector block, an ejector, and a moving mold follower. The moving mold part has a moving mold cavity, and the fixed mold part has a mold core cavity through which the fixed mold core passes. The ejector is installed inside the moving mold part, and its movable end abuts against the ejector block, which is located below the moving mold cavity, with its top sealed to the moving mold cavity. The fixed end of the moving mold follower is disposed on the moving mold part, and its movable end is disposed on the injection plate of the fixed mold part, allowing the moving mold part to move the injection plate a certain distance to pull the fixed mold core out of the thin-walled injection mold. The injection molding machine includes the ring-shaped thin-walled injection mold structure. This achieves the technical effect of a stable ejection structure that is less prone to jamming.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically, to a ring-shaped thin-walled injection mold structure and an injection molding machine. Background Technology

[0002] Currently, ring-shaped thin-walled injection molded products are appearing in many fields, with extremely high demand and increasingly stringent quality requirements. Traditional mold structures can hardly meet the current market demands, so stable and high-quality mold structures have become the core competitiveness of the industry in the production of such products.

[0003] For ring-shaped thin-walled injection molds, it is necessary to ensure ejection force and prevent sticking to the front and rear molds. The traditional method is a rear mold ejector sleeve structure, but the ejector sleeve structure has poor stability and a high risk of jamming.

[0004] Therefore, providing a stable annular thin-walled injection mold structure and injection molding machine that will not jam has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a ring-shaped thin-walled injection mold structure and an injection molding machine to alleviate the technical problems of poor ejector stability and easy jamming in the prior art.

[0006] In a first aspect, embodiments of the present invention provide an annular thin-walled injection mold structure, including a fixed mold part, a moving mold part, an ejector block, an ejector, and a moving mold follower;

[0007] The moving mold has a moving mold cavity, and the fixed mold has a mold core cavity through which the fixed mold core passes for sealing.

[0008] The ejector is installed inside the moving mold, and the movable end of the ejector abuts against the top block. The top block is located below the moving mold cavity, and the top of the top block is sealed to the moving mold cavity.

[0009] The fixed end of the moving mold follower is disposed on the moving mold, and the moving end of the moving mold follower is disposed on the injection plate of the fixed mold, so that the moving mold can drive the injection plate to move a distance so that the fixed mold core is pulled out from the thin-walled injection mold.

[0010] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the aforementioned fixed mold component includes a fixed mold mounting base, a hot runner plate, an injection molding plate, and a fixed mold cavity plate;

[0011] The fixed mold mounting base, hot runner plate, injection plate and fixed mold cavity plate are connected together from top to bottom;

[0012] The mold cavity is formed on the fixed mold cavity plate;

[0013] The fixed mold core is located at the bottom of the hot runner plate.

[0014] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the moving mold component includes a moving mold mounting base, a push plate, a support plate, and a moving mold cavity plate;

[0015] The moving mold mounting base, push plate, support plate and moving mold cavity plate are connected in sequence from bottom to top;

[0016] The moving model cavity is formed on the moving model cavity plate;

[0017] The ejector is mounted on the push plate.

[0018] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the moving mold cavity plate is further provided with an ejection cavity for mounting a top block, the ejection cavity is located below the moving mold cavity, the moving mold cavity is in communication with the ejection cavity, the inner diameter of the ejection cavity is smaller than the inner diameter of the moving mold cavity, and the inner diameter of the ejection cavity is larger than the inner diameter of the thin-walled injection molded part.

[0019] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the longitudinal section of the top block is U-shaped, and the bottom of the fixed mold core is in sealed contact with the top of the top block.

[0020] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein a cooling channel is provided inside the fixed mold core, and the cooling channel is connected to the cooling flow channel of the injection plate.

[0021] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the ejector includes an ejector rod and a guide sleeve;

[0022] The guide sleeve is disposed inside the support plate, one end of the push rod is disposed on the push plate, and the other end of the push rod can pass through the support plate and abut against the top block.

[0023] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the moving mold follower includes a control slide and an elastic tie rod;

[0024] The control slide is fixedly mounted on the hot runner plate;

[0025] One end of the elastic tie rod is fixedly mounted on the support plate, and the other end abuts against the injection molded plate. The trigger rod of the elastic tie rod is slidably mounted on the control slide.

[0026] The control slide includes a first horizontal slide, a raised slide, and a second horizontal slide connected in sequence.

[0027] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the above-mentioned elastic tie rod includes a connecting rod, a locking head, an elastic element, and the trigger rod;

[0028] One end of the connecting rod is rotatably mounted on the support plate via the elastic element, and the clamping head is mounted on the other end of the connecting rod, and the clamping head can abut against the injection molded plate;

[0029] The trigger rod is mounted on the connecting rod, and the axis of the trigger rod intersects with the axis of the connecting rod.

[0030] Secondly, embodiments of the present invention provide an injection molding machine, including the aforementioned annular thin-walled injection mold structure.

[0031] Beneficial effects:

[0032] This invention provides a ring-shaped thin-walled injection mold structure, including a fixed mold part, a moving mold part, an ejector block, an ejector, and a moving mold follower. The moving mold part has a moving mold cavity, and the fixed mold part has a mold core cavity through which the fixed mold core passes. The ejector is installed inside the moving mold part, and the movable end of the ejector abuts against the ejector block. The ejector block is located below the moving mold cavity, and the top of the ejector block is sealed to the moving mold cavity. The fixed end of the moving mold follower is disposed on the moving mold part, and the movable end of the moving mold follower is disposed on the injection plate of the fixed mold part, so that the moving mold part can drive the injection plate to move a distance to pull the fixed mold core out of the thin-walled injection mold.

[0033] Specifically, after injection molding is completed, the moving mold part moves away from the fixed mold part under the action of the driving component. During the process of the moving mold part moving away from the fixed mold part, the moving mold part drives the injection plate of the fixed mold part through the moving mold follower, so that the fixed mold core in the fixed mold part can be pulled out from the thin-walled injection molded part. Then, by setting the ejector on the moving mold part to drive the ejector block to move, the ejector block can push out the thin-walled injection molded part located in the moving mold cavity, thereby completing the unloading. With this unloading method, there is no need to set the ejector sleeve, so there will be no jamming phenomenon, improving stability.

[0034] This invention provides an injection molding machine, including an annular thin-walled injection mold structure. The injection molding machine has the advantages described above compared to existing technologies, which will not be elaborated further here. Attached Figure Description

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the annular thin-walled injection mold structure provided in an embodiment of the present invention;

[0037] Figure 2 This is an internal schematic diagram of the annular thin-walled injection mold structure provided in an embodiment of the present invention;

[0038] Figure 3 A cross-sectional view of the annular thin-walled injection mold structure provided in an embodiment of the present invention (wherein the fixed injection plate and the mold cavity plate are not shown);

[0039] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0040] Figure 5 This is a schematic diagram of the moving mold follower in the annular thin-walled injection mold structure provided in an embodiment of the present invention.

[0041] icon:

[0042] 100 - Fixed mold part; 101 - Fixed mold core; 102 - Mold core cavity; 103 - Cooling channel; 110 - Fixed mold mounting base; 120 - Hot runner plate; 130 - Injection plate; 140 - Fixed mold cavity plate;

[0043] 200 – Moving mold component; 201 – Moving mold cavity; 202 – Ejection cavity; 210 – Moving mold mounting base; 220 – Push plate; 230 – Support plate; 240 – Moving mold cavity plate;

[0044] 300 - Ejector; 310 - Ejector block; 320 - Ejector rod; 330 - Guide sleeve;

[0045] 400 – Moving mold follower; 410 – Control slide; 411 – First horizontal slide; 412 – Raised slide; 413 – Second horizontal slide; 420 – Elastic tie rod; 421 – Connecting rod; 422 – Clamp; 423 – Elastic element; 424 – Trigger rod;

[0046] 500 - Thin-walled injection molded parts. Detailed Implementation

[0047] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0052] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, this embodiment of the invention provides a ring-shaped thin-walled injection mold structure, including a fixed mold part 100, a movable mold part 200, an ejector block 310, an ejector 300, and a movable mold follower 400; the movable mold part 200 has a movable mold cavity 201, and the fixed mold part 100 has a mold core cavity 102 through which the fixed mold core 101 passes; the ejector 300 is installed inside the movable mold part 200, and the movable end of the ejector 300 abuts against the ejector block 310, the ejector block 310 is located below the movable mold cavity 201, and the top of the ejector block 310 is sealed to the movable mold cavity 201; the fixed end of the movable mold follower 400 is disposed on the movable mold part 200, and the movable end of the movable mold follower 400 is disposed on the injection plate 130 of the fixed mold part 100, so that the movable mold part 200 can drive the injection plate 130 to move a distance so that the fixed mold core 101 is pulled out from the thin-walled injection mold 500.

[0053] Specifically, after injection molding is completed, the moving mold part 200 moves away from the fixed mold part 100 under the action of the driving component. During the process of the moving mold part 200 moving away from the fixed mold part 100, the moving mold part 200 drives the injection plate 130 of the fixed mold part 100 through the moving mold follower 400, so that the fixed mold core 101 in the fixed mold part 100 can be pulled out from the thin-walled injection molded part 500. Then, by setting the ejector 300 on the moving mold part 200 to drive the ejector block 310 to move, the ejector block 310 can eject the thin-walled injection molded part 500 located in the moving mold cavity 201, thereby completing the unloading. With this unloading method, there is no need to set the ejector sleeve, so there will be no jamming phenomenon, improving stability.

[0054] The fixed mold component 100 includes a fixed mold mounting base 110, a hot runner plate 120, an injection molding plate 130, and a fixed mold cavity plate 140. The fixed mold mounting base 110, the hot runner plate 120, the injection molding plate 130, and the fixed mold cavity plate 140 are connected together from top to bottom. The mold core cavity 102 is formed on the fixed mold cavity plate 140. In addition, the fixed mold core 101 is fixed on the hot runner plate 120. When the moving mold component 200 moves, it can drive the injection molding plate 130 to move. Thus, when the fixed mold core 101 is pulled out from the thin-walled injection molded part 500, the fixed mold cavity plate 140 is in a position that presses down on the thin-walled injection molded part 500, which can prevent the thin-walled injection molded part 500 from sticking to the fixed mold core 101.

[0055] The moving mold component 200 includes a moving mold mounting base 210, a push plate 220, a support plate 230, and a moving mold cavity plate 240; the moving mold mounting base 210, push plate 220, support plate 230, and moving mold cavity plate 240 are connected sequentially from bottom to top; the moving mold cavity 201 is opened on the moving mold cavity plate 240; the ejector 300 is installed on the push plate 220.

[0056] In addition, the moving mold cavity plate 240 is also provided with an ejection cavity 202 for mounting the ejector block 310. The ejection cavity 202 is located below the moving mold cavity 201 and is connected to the moving mold cavity 201. The inner diameter of the ejection cavity 202 is smaller than the inner diameter of the moving mold cavity 201, and the inner diameter of the ejection cavity 202 is larger than the inner diameter of the thin-walled injection molded part 500. With this arrangement, the ejector block 310 will not get stuck with the moving mold cavity 201 when ejecting the thin-walled injection molded part 500. Furthermore, a portion of the bottom of the thin-walled injection molded part 500 is connected to the top of the ejection cavity 202, and another portion is connected to the top of the ejector block 310. This reduces the contact area between the ejector block 310 and the thin-walled injection molded part 500, preventing the thin-walled injection molded part 500 from sticking to the ejector block 310 and facilitating demolding.

[0057] The top block 310 has a U-shaped longitudinal section, and the bottom of the fixed mold core 101 is in sealed contact with the top of the top block 310. Setting the longitudinal section of the top block 310 to U-shape improves its structural strength. Additionally, a protrusion is provided at the bottom of the fixed mold core 101, which can be inserted into the top block 310, allowing for better mutual positioning between the top block 310 and the fixed mold core 101, preventing misalignment and improving the injection molding quality of the thin-walled injection molded part 500.

[0058] The fixed mold core 101 has a cooling channel 103 inside, which is connected to the cooling flow channel of the injection plate 130. The inner ring of the thin-walled injection molded part 500 is directly cooled through the cooling channel 103 inside the fixed mold core 101, thereby improving the cooling efficiency.

[0059] Specifically, the ejector 300 includes an ejector rod 320 and a guide sleeve 330; the guide sleeve 330 is disposed within the support plate 230, one end of the ejector rod 320 is disposed on the push plate 220, and the other end of the ejector rod 320 can pass through the support plate 230 and abut against the ejector block 310. The guide sleeve 330 guides the direction of the ejector rod 320, ensuring the stability of the ejector rod 320 during long-term use.

[0060] Specifically, the moving mold follower 400 includes a control slide 410 and an elastic tie rod 420; the control slide 410 is fixedly mounted on the hot runner plate 120; one end of the elastic tie rod 420 is fixedly mounted on the support plate 230, and the other end abuts against the injection plate 130, and the trigger rod 424 of the elastic tie rod 420 is slidably mounted on the control slide 410; the control slide 410 includes a first horizontal slide 411, a raised slide 412 and a second horizontal slide 413 connected in sequence.

[0061] It should be noted that the elastic rod 420 includes a connecting rod 421, a locking head 422, an elastic element 423, and a trigger rod 424; one end of the connecting rod 421 is rotatably mounted on the support plate 230 via the elastic element 423, the locking head 422 is mounted on the other end of the connecting rod 421, and the locking head 422 can abut against the injection molded plate 130; the trigger rod 424 is mounted on the connecting rod 421, and the axis of the trigger rod 424 intersects with the axis of the connecting rod 421.

[0062] Specifically, after injection molding, the moving mold mounting base 210 of the moving mold part 200 performs an opening action with the injection molding machine, causing the push plate 220, support plate 230, and moving mold cavity plate 240 provided on the moving mold mounting base 210 to move together with the moving mold mounting base 210. Furthermore, a clamping head 422 is provided on the connecting rod 421 provided on the support plate 230, and the clamping head 422 abuts against the injection plate 130, thereby enabling the connecting rod 421 to pull the injection plate 130 of the fixed mold part 100 to move together. The trigger rod 424 on the connecting rod 21 slides on the control slide 410, causing the fixed mold cavity plate 140 set on the injection plate 130 to move together. When the injection plate 130 and the fixed mold cavity plate 140 move relative to the fixed mold mounting base 110, the fixed mold core 101 set on the hot runner plate 120 will move relative to the fixed mold cavity plate 140, thereby realizing the action of pulling the fixed mold core 101 out of the thin-walled injection molded part 500, realizing the demolding of the fixed mold core 101. At this time, the trigger rod 424 on the connecting rod 421 slides on the control slide 410, causing the fixed mold cavity plate 140 set on the injection plate 130 to move together. 24 slides from the first horizontal slide rail 411 to the raised slide rail 412. The height of the raised slide rail 412 is higher than that of the first horizontal slide rail 411. At this time, the end of the connecting rod 421 away from the locking head 422 can rotate relative to the support plate 230. At this time, the end of the connecting rod 421 with the locking head 422 will swing upward, thereby causing the locking head 422 to disengage from the injection plate 130. The moving mold part 200 continues to move, and the trigger rod 424 slides from the raised slide rail 412 to the second horizontal slide rail 413. The elastic element 42 of the pull rod... Under the action of 3, the mold is reset (wherein, the elastic element 423 also has the function of maintaining the position of the pull rod, so that the clamp 422 is stably connected to the injection plate 130). Then, when the moving mold part 200 moves away from the fixed mold part 100 by a set distance, the push plate 220 is driven by the injection molding machine to work. The push plate 220 drives the ejector rod 320 to move. The ejector rod 320 moves along the guide sleeve 330 to the ejector block 310, thereby driving the ejector block 310 to eject the thin-walled injection molded part 500 in the moving mold cavity 201, thereby completing the demolding work.

[0063] This embodiment provides an injection molding machine, including an annular thin-walled injection mold structure.

[0064] Specifically, the injection molding machine provided in this embodiment has the advantages of the above-mentioned annular thin-walled injection mold structure compared with the prior art, which will not be elaborated here.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mold structure for injection molding thin-walled annular articles, comprising: include: Fixed mold part (100), moving mold part (200), ejector block (310), ejector part (300), moving mold follower part (400); The moving mold (200) has a moving mold cavity (201), and the fixed mold (100) has a mold core cavity (102) through which the fixed mold core (101) passes for sealing. The ejector (300) is installed inside the moving mold (200), and the movable end of the ejector (300) abuts against the top block (310). The top block (310) is located below the moving mold cavity (201), and the top of the top block (310) is sealed to the moving mold cavity (201). The fixed end of the moving mold follower (400) is disposed on the moving mold (200), and the moving end of the moving mold follower (400) is disposed on the injection plate (130) of the fixed mold (100), so that the moving mold (200) can drive the injection plate (130) to move a certain distance so that the fixed mold core (101) is pulled out from the thin-walled injection mold (500); The fixed mold component (100) includes a fixed mold mounting base (110), a hot runner plate (120), a fixed mold cavity plate (140), and an injection plate (130); the fixed mold mounting base (110), the hot runner plate (120), the injection plate (130), and the fixed mold cavity plate (140) are connected together from top to bottom; the mold core cavity (102) is opened on the fixed mold cavity plate (140); the fixed mold core (101) is located at the bottom of the hot runner plate (120); The moving mold component (200) includes a moving mold mounting base (210), a push plate (220), a support plate (230), and a moving mold cavity plate (240); the moving mold mounting base (210), push plate (220), support plate (230), and moving mold cavity plate (240) are connected sequentially from bottom to top; the moving mold cavity (201) is formed on the moving mold cavity plate (240); the ejector (300) is mounted on the push plate (220); The moving mold follower (400) includes a control slide (410) and an elastic tie rod (420); the control slide (410) is fixedly mounted on the hot runner plate (120); one end of the elastic tie rod (420) is fixedly mounted on the support plate (230), and the other end abuts against the injection plate (130), and the trigger rod (424) of the elastic tie rod (420) is slidably mounted on the control slide (410); the control slide (410) includes a first horizontal slide (411), a raised slide (412), and a second horizontal slide (413) connected in sequence. The elastic tie rod (420) includes a connecting rod (421), a locking head (422), an elastic element (423), and a trigger rod (424); one end of the connecting rod (421) is rotatably mounted on the support plate (230) via the elastic element (423), the locking head (422) is mounted on the other end of the connecting rod (421), and the locking head (422) can abut against the injection molded plate (130); the trigger rod (424) is mounted on the connecting rod (421), and the axis of the trigger rod (424) intersects with the axis of the connecting rod (421).

2. The annular thin-walled injection molded part mold structure of claim 1, wherein, The moving mold cavity plate (240) is also provided with an ejection cavity (202) for mounting the top block (310). The ejection cavity (202) is located below the moving mold cavity (201). The moving mold cavity (201) is connected to the ejection cavity (202). The inner diameter of the ejection cavity (202) is smaller than the inner diameter of the moving mold cavity (201), and the inner diameter of the ejection cavity (202) is larger than the inner diameter of the thin-walled injection molded part (500).

3. The annular thin-walled injection molded part mold structure of claim 2, wherein, The top block (310) has a U-shaped longitudinal section, and the bottom of the fixed mold core (101) is in sealed contact with the top of the top block (310).

4. The annular thin-walled injection molded part mold structure of claim 3, wherein, The mold core (101) has a cooling channel (103) inside, which is connected to the cooling channel of the injection plate (130).

5. The annular thin-walled injection molded part mold structure of claim 2, wherein, The ejector (300) includes an ejector rod (320) and a guide sleeve (330); The guide sleeve (330) is disposed inside the support plate (230), one end of the push rod (320) is disposed on the push plate (220), and the other end of the push rod (320) can pass through the support plate (230) and abut against the top block (310).

6. An injection molding machine characterized by, Includes the annular thin-walled injection mold structure as described in any one of claims 1-5.

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