Automatic water gap cutting mechanism and injection mold

Abstract

The invention relates to the technical field of injection molding equipment, and provides an automatic water gap cutting mechanism and an injection mold.The automatic water gap cutting mechanism comprises a first pushing part and a second pushing part which are arranged at intervals in the vertical direction and can vertically slide, and the first pushing part is provided with a cutting part; the end, away from the first pushing part, of the cutting-off part is located at a water gap of the injection mold, the second pushing part is provided with an ejection part, the end, away from the second pushing part, of the ejection part is located at the bottom of a cavity of the injection mold, and the first pushing part and the second pushing part are movably connected. And after the first pushing piece slides upwards under the action of external force to drive the cutting piece to cut off the water gap strip, the first pushing piece drives the second pushing piece to slide upwards, so that the ejection part ejects the plastic product out of the lower mold. According to the automatic water gap cutting mechanism, the steps of water gap cutting and plastic product ejection can be sequentially carried out in the injection mold, water gap cutting operation does not need to be carried out on the demolded plastic product, and the overall production efficiency and the yield of the plastic product are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of injection molding equipment, and more specifically, relates to an automatic water-cutting mechanism and an injection mold. Background Art

[0002] Typically, the sprue (gate) connects the mold runner to the product. After molding, this creates excess material on the product, known as a sprue strip or sprue material. Sprue cutting is a post-processing step to remove this excess material, directly impacting product appearance and subsequent assembly.

[0003] In related technologies, sprues can be manually cut using diagonal pliers, utility knives, or specialized shears; mechanical punching with hydraulic punches or pneumatic cutters; or hot or cold cutting techniques can be used to cut sprue material. However, all of these sprue cutting methods require an additional sprue cutting process after the plastic product is injection molded, resulting in low overall processing efficiency. Furthermore, secondary or reprocessing can easily affect the appearance of the plastic product, reducing the yield rate. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an automatic water-cutting mechanism and an injection mold to solve the technical problems existing in the prior art of low overall processing efficiency of plastic products and secondary processing affecting the yield rate.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an automatic water outlet cutting mechanism, which is used to be assembled at the bottom of the lower mold of the injection mold and to cut off the water outlet strip of the molded plastic product. The automatic water outlet cutting mechanism includes a first pushing member and a second pushing member arranged at intervals in the vertical direction and both can slide vertically. The first pushing member is provided with a cutting member, and the end of the cutting member away from the first pushing member is located at the water outlet of the injection mold. The second pushing member is provided with an ejection member, and the end of the ejection member away from the second pushing member is located at the bottom of the cavity of the injection mold. The first pushing member and the second pushing member are movably connected, so that the first pushing member slides upward under the action of external force to drive the cutting member to cut the water outlet strip. After that, the first pushing member drives the second pushing member to slide upward, so that the ejection member ejects the plastic product from the lower mold.

[0006] In one embodiment, the first pushing member is located at the bottom of the second pushing member, and the cutting member can slide upward through the second pushing member, so that the first pushing member drives the cutting member to cut the nozzle strip and then contacts and pushes the second pushing member to slide upward.

[0007] In one embodiment, the automatic water cutting mechanism also includes a support column, which is arranged at the bottom of the injection mold. The support column upwardly passes through the first pushing member and presses against the bottom of the second pushing member to bear the weight of the second pushing member and allow the first pushing member to slide along the support column.

[0008] In one embodiment, the automatic water cutting mechanism also includes a stabilizing member, which is fixedly stacked on the top surface of the second pushing member. The stabilizing member is provided with a matching hole vertically passing through itself, the ejection member passes through the matching hole, and the bottom of the ejection member is fixed in the matching hole.

[0009] In one embodiment, the automatic water-cutting mechanism further includes an elastic member, which is clamped between the stabilizing member and the lower mold of the injection mold and is used to reset the first pushing member, the second pushing member and the stabilizing member as a whole after sliding upward.

[0010] In one embodiment, the interval between the first pushing members is 1-5 mm.

[0011] In one embodiment, the second pushing member is located at the bottom of the first pushing member, a slider is provided on one side wall of the first pushing member, a guide rail is provided on one side wall of the second pushing member, and a limiting portion is provided at the end of the guide rail. The guide rail extends upward from the second pushing member to the position of the first pushing member, and the slider is slidably connected to the guide rail. When the first pushing member drives the cutting member to cut the water outlet strip, the slider slides to the end of the guide rail and is limited by the limiting portion, so that the first pushing member drives the second pushing member to slide upward through the slider and the guide rail.

[0012] In one embodiment, the automatic water-cutting mechanism further includes a guide column, which stands upright at the bottom of the injection mold and passes upward through the first push member and the second push member, so that the first push member and the second push member can slide along the guide column.

[0013] In one embodiment, the ejection component includes a plurality of ejector pins, all of which are vertically fixed to the second ejection member and spaced apart; And / or, the ejection component includes a plurality of sleeves, and all the sleeves are vertically fixed to the second ejection member and are distributed at intervals.

[0014] The present application also provides an injection mold, including a base body and an automatic water-cutting mechanism. The base body is provided with an upper mold and a lower mold that cooperate with each other, and a cavity for molding plastic products is formed between the upper mold and the lower mold; the base body has a cavity located below the upper mold and the lower mold, and the automatic water-cutting mechanism is arranged in the cavity.

[0015] The beneficial effects of the automatic water-cutting mechanism and injection mold provided by this application are: Compared with the prior art, the present application can realize the steps of cutting the sprue and ejecting the plastic product in sequence in the injection mold through the movability of the first ejector member and the second ejector member, thereby eliminating the need to perform the sprue cutting operation on the plastic product after demolding, greatly reducing the processing steps, improving the overall production efficiency and processing efficiency of the plastic product, and avoiding the uneven quality of the sprue cutting during secondary processing that affects the appearance of the plastic product, thereby improving the yield rate of the plastic product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. 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 any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the injection mold of Example 1 of the present application.

[0018] Figure 2 This is a schematic diagram of the vertical cross-sectional structure of the injection mold of Example 1 of the present application.

[0019] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the injection mold of Example 1 of the present application after omitting the upper mold structure.

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the first pushing member in Example 1 of the present application.

[0021] Figure 5 This is a schematic diagram of the overall three-dimensional cross-sectional structure of the first pushing member, the second pushing member and the stabilizing member in Example 1 of the present application.

[0022] Figure 6 This is a schematic diagram of the overall vertical cross-sectional structure of the first pushing member, the second pushing member and the stabilizing member of the second embodiment of the present application, wherein the second pushing member is located at the bottom of the first pushing member.

[0023] Among them, the reference numerals in the figures are: 100, base; 101, upper mold; 102, lower mold; 103, plastic product; 1031, nozzle strip; 104, cavity; 1. First pushing member; 11. Cutting member; 12. Pressing surface; 13. Slider; 2. Second pushing member; 21. Ejection member; 22. Guide rail; 3. Stabilizing member; 31. Matching hole; 4. Support column; 5. Spacer; 6. Elastic member; 7. Guide column; 8. Ejection rod. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0025] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may 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 may 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 accompanying drawings, and are only for the convenience of describing this 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 cannot be understood as a limitation on this application.

[0027] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0028] Example 1 The following combination Figures 1 to 5 The automatic water-cutting mechanism and injection mold provided in Example 1 of the present application are described.

[0029] like Figure 1 and Figure 2 As shown, the injection mold provided in the first embodiment of the present application is used to be installed on an injection molding machine to mold a plastic product 103. The injection mold includes a base 100 and an automatic watertight mechanism. The base 100 is provided with an upper mold 101 and a lower mold 102 that cooperate with each other. The upper mold 101 and the lower mold 102 form a cavity for molding the plastic product 103. The base 100 has a cavity 104 located below the lower mold 102, and the automatic watertight mechanism is disposed in the cavity 104.

[0030] Specifically, the upper mold 101 and the lower mold 102 have two states: closed mold and open mold. When the upper mold 101 and the lower mold 102 are closed and matched, the upper mold 101 and the lower mold 102 are in the closed mold state, and a cavity is formed between the upper mold 101 and the lower mold 102 and is defined as a mold cavity. The upper mold 101 or the lower mold 102 also has an injection channel, and the injection channel is connected to the mold cavity. The injection molding machine can inject molten plastic raw material into the mold cavity through the injection channel, thereby forming a plastic product 103 with a predetermined contour shape in the mold cavity. After the plastic product 103 cools, the upper mold 101 can be separated and opened relative to the lower mold 102. At this time, the upper mold 101 and the lower mold 102 are in the open mold state, and the cooled and molded plastic product 103 is exposed to the outside world, and the plastic product 103 can be taken out.

[0031] After the injection molding machine injects the plastic raw material into the mold cavity, excess plastic waste will be formed in the area between the injection channel and the plastic product 103, which is called the nozzle strip 1031. In order to ensure the smooth and regular appearance of the plastic product 103, the nozzle strip 1031 needs to be removed. Figures 1 to 3 As shown, the automatic sprue cutting mechanism of the embodiment of the present application is used to be assembled within the cavity 104 at the bottom of the lower mold 102 of the injection mold and to cut the sprue strip 1031 of the molded plastic product 103. The automatic sprue cutting mechanism includes a first push member 1 and a second push member 2, which are arranged in a vertically spaced relationship and can both slide vertically. For example, the first push member 1 and the second push member 2 are both plate-shaped push plates, separated by a predetermined distance in the vertical direction, and can both slide vertically within the cavity 104.

[0032] The first push member 1 is provided with a cut-off piece 11. The end of the cut-off piece 11, which is away from the first push member 1, is located at the sprue of the injection mold. Therefore, after the plastic product 103 is molded, the cut-off piece 11 abuts against the sprue strip 1031 of the plastic product 103 in the injection mold. For example, the cut-off piece 11 can be a long, rod-shaped cutter with a blade on top. The cut-off piece 11 extends upward from the first push member 1 and penetrates the lower mold 102 until it abuts against the sprue strip 1031, thereby removing the sprue strip 1031.

[0033] The second ejector member 2 is provided with an ejection component 21. The end of the ejection component 21, which is away from the second ejector member 2, is located at the bottom of the injection mold cavity, so that the ejection component 21 can abut against the molded plastic product 103. For example, the ejection component 21 can be a long rod-shaped ejector pin. The ejection component 21 extends upward from the second ejector member 2 and passes through the lower mold 102 until it abuts against the bottom of the plastic product 103, thereby facilitating the ejection of the plastic product 103 from the lower mold 102 after the mold is opened.

[0034] It should be noted that, since the first push member 1 and the second push member 2 are arranged vertically in the cavity 104, the first push member 1 is located at the bottom of the second push member 2, or conversely, the second push member 2 is located at the bottom of the first push member 1. When the first push member 1 is located at the bottom of the second push member 2, the second push member 2 is provided with an escape area or through-hole through which the cutting member 11 on the first push member 1 can pass. In this way, the cutting member 11 can sequentially pass through the second push member 2 and the lower mold 102 and extend to the position of the nozzle strip 1031. Conversely, when the second push member 2 is located at the bottom of the first push member 1, the first push member 1 is provided with an escape area or through-hole through which the ejection member 21 on the second push member 2 can pass. In this way, the ejection member 21 can sequentially pass through the first push member 1 and the lower mold and abut the bottom of the plastic product 103.

[0035] The first ejector member 1 is connected to the ejector rod 8 of the injection molding machine, so that the injection molding machine can output power to the first ejector member 1 through the ejector rod 8; that is, the ejector rod 8 can drive the first ejector member 1 to slide upward, so that the first ejector member 1 drives the cutting member 11 to cut off the sprue strip 1031.

[0036] The first push member 1 and the second push member 2 are movably connected, and the sliding sequence and sliding stroke between the two are mutually related, so that the first push member 1 slides upward under the action of external force (i.e., under the action of the ejector rod 8) to drive the cutting member 11 to cut the nozzle strip 1031, and then the first push member 1 drives the second push member 2 to slide upward, so that the ejection member 21 ejects the plastic product 103 from the lower mold 102. Figures 1 to 5 In the first embodiment shown, the first pushing member 1 is located at the bottom of the second pushing member 2. In this way, when the first pushing member 1 drives the cutting member 11 to cut off the sprue strip 1031, the first pushing member 1 contacts the second pushing member 2 and can push the second pushing member 2 to slide upward, so that the ejection member 21 ejects the plastic product 103 from the lower mold 102, thereby realizing the demolding of the plastic product 103.

[0037] The injection mold and automatic sprue cutting mechanism of Example 1 operate as follows: First, the injection molding machine lifts the first ejector member 1 via the ejector rod 8. This first ejector member 1 drives the cutter member 11 to cut the sprue strip 1031. When the cutter member 11 completely cuts the sprue strip 1031, the first ejector member 1 contacts the second ejector member 2. The upper mold 101 is then moved away from the lower mold 102, thereby opening the mold cavity and the molded plastic product 103. At this point, the sprue strip 1031 on the plastic product 103 has been cut away, and the entire plastic product 103 is exposed to the outside world. Next, the injection molding machine continues to lift the first ejector 1 through the ejector rod 8. The first ejector 1 pushes the second ejector 2 to slide upward, and the second ejector 2 drives the ejector component 21 to smoothly eject the plastic product 103. Since the upper mold 101 and the lower mold 102 have been opened at this time, the plastic product 103 is no longer restricted and will be separated from the lower mold 102, thereby realizing the removal and demolding of the plastic product 103 after molding, making it easier to transport the plastic product 103 to the next processing step.

[0038] It should also be noted that, since the end of the cutting piece 11 away from the first pushing piece 1 is located at the nozzle, when the plastic product 103 is formed, the cutting piece 11 can abut against the nozzle strip 1031. Thus, in the process of the first pushing piece 1 sliding upward and driving the cutting piece 11 to cut the nozzle strip 1031, the cutting piece 11 moves upward a distance slightly greater than or equal to the diameter of the nozzle strip 1031, and the nozzle strip 1031 can be cut off. Figure 2 and Figure 3 It can be seen that the injection molding mold provided in the present application is used to form thinner plastic products 103. The diameter of the sprue strip 1031 is generally only a few millimeters. Therefore, the travel distance of the first push member 1 in the sprue cutting step only needs to be slightly greater than or equal to the diameter of the sprue strip 1031 (about a few millimeters), and the distance between the first push member 1 and the second push member 2 is equal to the travel distance of the first push member 1 in the sprue cutting step. Therefore, the distance between the first push member 1 and the second push member 2 is also relatively small, about a few millimeters. Therefore, in the drawings of the present application, the distance between the first push member 1 and the second push member 2 is almost not reflected.

[0039] The present application sets a first pushing member 1 and a second pushing member 2 which are movably connected, and the first pushing member 1 is provided with a cutting member 11, and the second pushing member 2 is provided with an ejection member 21, so that the steps of cutting the water outlet and ejecting the plastic product 103 can be performed in sequence, and are all completed inside the injection mold. There is no need to perform a secondary water outlet cutting operation on the molded plastic product 103, which greatly reduces the processing steps and improves the overall production efficiency and processing efficiency of the plastic product 103. The water outlet strip is cut off in the injection mold through the cutting member 11, and the cutting position and cutting amount of the water outlet strip can be uniformly and accurately controlled each time, avoiding the uneven quality of the cutting process during the secondary manual water outlet cutting process, which affects the appearance of the plastic product 103 and improves the yield rate of the plastic product 103.

[0040] In one embodiment, the first pushing member 1 is located at the bottom of the second pushing member 2, and the cutting member 11 can slide upward through the second pushing member 2, so that the first pushing member 1 drives the cutting member 11 to cut off the water outlet strip 1031 and then contacts and pushes the second pushing member 2 to slide upward.

[0041] like Figure 2 and Figure 4 As shown, the first push member 1 is located on the side of the second push member 2 away from the plastic product 103 in the injection mold, that is, the first push member 1 is located at the bottom of the second push member 2. The surface of the first push member 1 facing the second push member 2 is the pressing surface 12. The cutting member 11 is fixed to the first push member 1, and the ejection member 21 is fixed to the second push member 2. The second push member 2 is provided with a through hole for the cutting member 11 to pass through. In this way, the cutting member 11 passes upward through the second push member 2 and the lower mold 102 in sequence and extends to the position of the nozzle strip 1031.

[0042] When the first push member 1 drives the cutting member 11 to slide and cut the nozzle strip 1031, the first push member 1 gradually approaches the second push member 2. When the cutting member 11 completely cuts the nozzle strip 1031, the top pressure surface 12 of the first push member 1 just contacts the second push member 2. Therefore, the distance between the first push member 1 and the second push member 2 is exactly the travel distance of the cutting member 11 in the nozzle cutting step. After the mold is opened, as the injection molding machine continues to lift the first push member 1 through the ejector rod 8, the top pressure surface 12 of the first push member 1 pushes the second push member 2 to slide upward, and the second push member 2 drives the ejection component 21 to eject the plastic product 103, and the plastic product 103 is separated from the lower mold 102, thereby realizing the removal of the plastic product 103 after molding.

[0043] By arranging the first pushing member 1 at the bottom of the second pushing member 2, when the first pushing member 1 drives the cutting member 11 to cut off the sprue strip 1031, the first pushing member 1 continues to slide upward to push the second pushing member 2 to slide upward, thereby driving the ejection member 21 to eject the plastic product 103. No additional connecting parts are required between the first pushing member 1 and the second pushing member 2, which simplifies the structure and reduces the difficulty of manufacturing and assembling the injection mold.

[0044] In one embodiment, the automatic water cutting mechanism also includes a support column 4, which is arranged at the bottom of the injection mold. The support column 4 passes upward through the first pushing member 1 and presses against the bottom of the second pushing member 2 to bear the weight of the second pushing member 2 and allow the first pushing member 1 to slide along the support column 4.

[0045] Specifically, if Figure 5 As shown, the support column 4 is vertically fixed on the base 100 in the cavity 104, and the shape of the support column 4 is cylindrical or square. The number of the support columns 4 is one or more. The first push member 1 is provided with a through hole for the support column 4 to move through. The support column 4 passes through the through hole of the first push member 1 and abuts against the bottom of the second push member 2. When there are multiple support columns 4, all the support columns 4 are spaced apart on the horizontal plane, and all the support columns 4 pass through the through hole of the first push member 1 and abut against the bottom of the second push member 2 in a one-to-one correspondence. It can be understood that the support column 4 only passes through the first pushing member 1 and does not pass through the second pushing member 2. The support column 4 is used to support the second pushing member 2 to ensure that there is a spacing distance between the second pushing member 2 and the first pushing member 1, thereby ensuring that the first pushing member 1 has a predetermined stroke distance when sliding upward and driving the cutting member 11 to cut off the water outlet strip 1031; and the support column 4 also guides and limits the sliding of the first pushing member 1, so that the first pushing member 1 can only slide vertically along the direction of the support column 4.

[0046] In one embodiment, the automatic watertight mechanism further includes a spacer 5 , which is fixed to a base 100 at the bottom of the injection mold. The spacer 5 is located at the bottom of the first push member 1 . Multiple spacers 5 are provided and spaced apart horizontally. The spacers 5 support the first push member 1 and bear its weight.

[0047] In some embodiments, reference Figures 1 to 3 The spacing distance between the first pushing member 1 and the second pushing member 2 is 1-5 mm.

[0048] It is understandable that if the distance between the first push member 1 and the second push member 2 is too small, then during the process of the cutting member 11 cutting the nozzle, before the cutting member 11 completely cuts off the nozzle strip 1031, the first push member 1 will already contact and push the second push member 2 to slide upward, resulting in incomplete removal of the nozzle strip 1031 and failure to achieve the desired processing effect. Conversely, if the distance between the first push member 1 and the second push member 2 is too large, then after the cutting member 11 has completely cut off the nozzle strip 1031, the first push member 1 has not yet contacted the second push member 2. At this time, the first push member 1 needs to continue to slide upward for a distance before contacting and pushing the second push member 2 to slide upward. Then, when the first push member 1 continues to slide upward but has not yet contacted the second push member 2, the weight of the plastic product 103 may press on the cutting member 11. This may cause the cutting member 11 to cut the plastic product 103 itself, thereby damaging the plastic product 103, and may also cause damage to the cutting edge of the cutting member 11.

[0049] Based on this, in this embodiment, the spacing distance between the first pushing member 1 and the second pushing member 2 is set within the range of 1-5 mm, so that in the process of the cutting member 11 cutting the sprue strip 1031, the moving stroke distance of the cutting member 11 is sufficient to cut the sprue strip 1031, and at the same time, the moving stroke distance of the cutting member 11 is not too large to cause damage to the plastic product 103 and damage to the cutting edge of the cutting member 11.

[0050] In one embodiment, the automatic water-cutting mechanism further includes a guide column 7 , which stands upright at the bottom of the injection mold and passes upward through the first push member 1 and the second push member 2 , so that the first push member 1 and the second push member 2 can slide along the guide column 7 .

[0051] Specifically, if Figure 2 As shown, at least one guide column 7 is also fixed in the cavity 104 of the injection mold, that is, the number of guide columns 7 can be one or more. When the number of guide columns 7 is multiple, all guide columns 7 are arranged at intervals, and each guide column 7 is erected at the bottom of the injection mold and extends upward and passes through the first push member 1 and the second push member 2 in sequence. The first push member 1 and the second push member 2 are both provided with through holes corresponding to the guide columns 7 for the guide columns 7 to pass through. The guide columns 7 are used to limit the sliding direction of the first push member 1 and the second push member 2, so that the first push member 1 and the second push member 2 can only slide along the extension direction of the guide columns 7, thereby driving the cutting member 11 to cut the water outlet and driving the ejection component 21 to eject the plastic product 103.

[0052] It can be understood that the guide column 7 extends upward from the bottom of the cavity 104 of the injection mold to the top of the second push member 2, while the support column 4 extends upward from the bottom of the cavity 104 of the injection mold to the top of the first push member 1 without passing through the second push member 2. Therefore, the height of the guide column 7 is higher than the support column 4. The support column 4 can only guide the water cutting step of the first push member 1, while the guide column 7 can guide the sliding of both the first push member 1 and the second push member 2.

[0053] In some embodiments, the automatic water cutting mechanism also includes a stabilizing member 3, which is fixedly stacked on the top surface of the second pushing member 2. The stabilizing member 3 is provided with a matching hole 31 that vertically passes through itself. The ejection member 21 passes through the matching hole 31, and the bottom of the ejection member 21 is fixed in the matching hole 31.

[0054] like Figures 1 to 3 As shown, the automatic water-cutting mechanism also includes a stabilizing member 3, which is a fixed plate. The stabilizing member 3 is arranged on the side of the second ejecting member 2 close to the lower mold 102 of the injection mold. The stabilizing member 3 is stacked on the second ejecting member 2, and the two can be fixed together by bolts. In other words, the stabilizing member 3 is fixedly stacked on the top surface of the second ejecting member 2. The stabilizing member 3 is provided with a matching hole 31 that passes vertically through it, and the matching hole 31 is used to fix the ejection member 21. The ejection member 21 passes through the matching hole 31, and the bottom of the ejection member 21 is fixed in the matching hole 31. For example, the space between the bottom of the ejection member 21 and the inner wall of the matching hole 31 can be filled with glue, so that the bottom of the ejection member 21 is fixed in the matching hole 31. In this way, the stabilizing member 3 can reinforce and guide the ejection member 21 to ensure the structural stability of the ejection member 21, so that the ejection member 21 has a stable posture when ejecting the plastic product 103 and avoids tilting to one side.

[0055] It should be noted that in Figures 1 to 3 In the embodiment shown, the stabilizing member 3 is further provided with a plurality of spaced-apart through holes for respectively passing the cutting member 11 and the guide post 7 , so that the stabilizing member 3 will not interfere with the sliding of the cutting member 11 and the guide post 7 , and can also guide the sliding of the cutting member 11 .

[0056] In some embodiments, continue to refer to Figure 1 and Figure 2 The automatic water-cutting mechanism also includes an elastic member 6, which is clamped between the stabilizing member 3 and the lower mold 102 of the injection mold, and is used to reset the first pushing member 1, the second pushing member 2 and the stabilizing member 3 after sliding upward as a whole.

[0057] Specifically, the elastic member 6 can be a spring telescopic rod or a reset spring. The elastic member 6 is clamped between the stabilizer 3 and the lower mold 102 of the injection mold. During the process of the first push member 1, the second push member 2 and the stabilizer 3 sliding upward as a whole and ejecting the plastic product 103 through the ejection component 21, the elastic member 6 will be compressed; then the compressed elastic member 6 can assist in reversely pushing the first push member 1, the second push member 2 and the stabilizer 3 as a whole to slide downward and reset; coupled with the overall gravity of the first push member 1, the second push member 2 and the stabilizer 3, the reverse thrust of the reset process is greater, more stable and reliable.

[0058] In some embodiments, the ejection component 21 includes a plurality of ejector pins, all of which are vertically fixed to the second ejection member 2 and spaced apart.

[0059] like Figure 3 As shown, the ejection component 21 includes a plurality of ejector pins, all of which are fixed to the second ejection member 2 and spaced apart. The ejector pins are spaced apart along the edge contour of the plastic product 103. This ensures that when the ejection component 21 ejects the plastic product 103, all parts of the plastic product 103 are evenly stressed, thereby ensuring smooth ejection of the plastic product 103.

[0060] In other embodiments, the ejection component 21 may also use a sleeve instead of an ejector pin, that is, the ejection component 21 includes a plurality of sleeves, all of which are vertically fixed to the second ejecting member 2 and spaced apart along the edge contour of the plastic product 103. This can also ensure that when the plastic product 103 is ejected by the ejection component 21, each part is evenly stressed and is ejected smoothly.

[0061] In another embodiment, the ejection component 21 includes a plurality of ejector pins and a plurality of ejector sleeves, all of which are vertically fixed to the second ejection component 2. The ejector pins and ejector sleeves are alternately spaced along the edge contour of the plastic product 103. This also allows the plastic product 103 to be evenly stressed at all parts and be ejected smoothly when being ejected by the ejection component 21.

[0062] Example 2 In Example 2 of the present application, the structure of the injection mold and the automatic water outlet cutting mechanism is basically the same as that of Example 1, except that the second pushing member 2 is located at the bottom of the first pushing member 1, and a slider 13 is provided on one side wall of the first pushing member 1, and a guide rail 22 is provided on one side wall of the second pushing member 2, and a limiting portion is provided at the end of the guide rail 22. The guide rail 22 extends upward from the second pushing member 2 to the position of the first pushing member 1, and the slider 13 is slidably connected to the guide rail 22. When the first pushing member 1 drives the cutting member 11 to cut off the water outlet strip 1031, the slider 13 slides to the end of the guide rail 22 and is limited by the limiting portion, so that the first pushing member 1 drives the second pushing member 2 to slide upward through the slider 13 and the guide rail 22.

[0063] like Figure 6 As shown, in the second embodiment, the arrangement order of the first pushing member 1 and the second pushing member 2 in the vertical direction is opposite to that of the first embodiment, that is, the first pushing member 1 is located above the second pushing member 2, and the second pushing member 2 is located at the bottom of the first pushing member 1, and the two are separated by a predetermined distance. A slider 13 is fixedly provided on one side wall of the first pushing member 1, and the slider 13 extends horizontally and protrudes from the side wall of the first pushing member 1. A vertical guide rail 22 is fixedly provided on the corresponding position of the second pushing member 2, one end of the guide rail 22 is fixed to the side wall of the second pushing member 2, and the other end of the guide rail 22 extends upward to the position of the slider 13 of the first pushing member 1, so that the slider 13 can be embedded in and slidably connected to the guide rail 22, that is, the slider 13 can slide along the guide rail 22. In particular, a limit portion is provided at the end of the guide rail 22, so that the slider 13 cannot fall out of the guide rail 22 when it slides to the end of the guide rail 22. For example, the guide rail 22 may be a structure having a long, strip-shaped slot in the middle and closed at both ends, so that the slider 13 can be inserted into the slot and slide up and down along the slot. The cooperation between the slider 13 and the guide rail 22 realizes a limited sliding connection between the first pushing member 1 and the second pushing member 2.

[0064] As a result, as the first push member 1 drives the cutting member 11 to slide upward and cut the nozzle strip 1031, the first push member 1 gradually moves away from the second push member 2, and the slider 13 also slides upward within the guide rail 22. When the cutting member 11 completely cuts the nozzle strip 1031, the slider 13 slides to the top of the guide rail 22. After the mold is opened, as the first push member 1 continues to slide upward, the slider 13 drives the second push member 2 to slide upward via the guide rail 22. The second push member 2 drives the ejection component 21 to slide upward, thereby ejecting the plastic product 103 and achieving separation and removal of the plastic product 103 from the lower mold 102.

[0065] Through the sliding limit connection mode of the first pushing member 1 and the second pushing member 2, the water outlet cutting action and the plastic product 103 ejection action can also be performed in sequence, which not only ensures that the cutting member 11 completely cuts off the water outlet strip 1031, but also ensures that the ejection component 21 can eject the plastic product 103.

[0066] Similarly, in the second embodiment, the automatic water-cutting mechanism further includes a stabilizing member 3, which is fixedly stacked on the top surface of the first pushing member 1. The stabilizing member 3 is provided with a mating hole 31 extending vertically through the stabilizing member 3. The cutting member 11 passes through the mating hole 31, and the bottom of the cutting member 11 is fixed in the mating hole 31. The stabilizing member 3 is also provided with a through hole for the ejection member 21 of the second pushing member 2 to pass through, so that the stabilizing member 3 does not interfere with the upward and downward sliding of the ejection member 21.

[0067] The automatic water-cutting mechanism also includes a guide column 7, which stands upright at the bottom of the injection mold and passes upward through the first push member 1, the second push member 2 and the stabilizing member 3, so that the first push member 1, the second push member 2 and the stabilizing member 3 can slide along the guide column 7.

[0068] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic nozzle cutting mechanism, used to be assembled at the bottom of the lower mold of the injection mold and to cut the nozzle strip of the molded plastic product, characterized in that: The automatic water outlet cutting mechanism includes a first pushing member and a second pushing member arranged at intervals in the vertical direction and both of which can slide vertically. The first pushing member is provided with a cutting member, and the end of the cutting member away from the first pushing member is located at the water outlet of the injection mold. The second pushing member is provided with an ejection member, and the end of the ejection member away from the second pushing member is located at the bottom of the cavity of the injection mold. The first pushing member and the second pushing member are movably connected, so that the first pushing member slides upward under the action of external force to drive the cutting member to cut the water outlet strip. After that, the first pushing member drives the second pushing member to slide upward, so that the ejection member ejects the plastic product from the lower mold.

2. The automatic water cut mechanism according to claim 1, characterized in that: The first pushing member is located at the bottom of the second pushing member, and the cutting member can slide upward through the second pushing member, so that the first pushing member drives the cutting member to cut the nozzle strip and then contacts and pushes the second pushing member to slide upward.

3. The automatic water cut mechanism according to claim 2, characterized in that: The automatic water-cutting mechanism also includes a support column, which is arranged at the bottom of the injection mold. The support column passes upward through the first pushing member and presses against the bottom of the second pushing member to bear the weight of the second pushing member and allow the first pushing member to slide along the support column.

4. The automatic water cut mechanism according to claim 2, characterized in that: The automatic water-cutting mechanism also includes a stabilizing member, which is fixedly stacked on the top surface of the second pushing member. The stabilizing member is provided with a matching hole vertically passing through itself, the ejection member passes through the matching hole, and the bottom of the ejection member is fixed in the matching hole.

5. The automatic water cut mechanism according to claim 4, characterized in that: The automatic water-cutting mechanism also includes an elastic member, which is clamped between the stabilizing member and the lower mold of the injection mold and is used to reset the first pushing member, the second pushing member and the stabilizing member as a whole after sliding upward.

6. The automatic water cut mechanism according to claim 1, characterized in that: The interval between the first pushing members is 1-5 mm.

7. The automatic water cut mechanism according to claim 1, characterized in that: The second pushing member is located at the bottom of the first pushing member, and a slider is provided on one side wall of the first pushing member, and a guide rail is provided on one side wall of the second pushing member, and a limiting portion is provided at the end of the guide rail. The guide rail extends upward from the second pushing member to the position of the first pushing member, and the slider is slidably connected to the guide rail. When the first pushing member drives the cutting member to cut the water outlet strip, the slider slides to the end of the guide rail and is limited by the limiting portion, so that the first pushing member drives the second pushing member to slide upward through the slider and the guide rail.

8. The automatic water cut mechanism according to any one of claims 1 to 7, characterized in that: The automatic water-cutting mechanism further comprises a guide post, which stands upright at the bottom of the injection mold and passes upward through the first pushing member and the second pushing member, so that the first pushing member and the second pushing member can slide along the guide post.

9. The automatic water cut mechanism according to any one of claims 1 to 7, characterized in that: The ejection component includes a plurality of ejector pins, all of which are vertically fixed to the second ejection member and spaced apart; And / or, the ejection component includes a plurality of sleeves, and all the sleeves are vertically fixed to the second ejection member and are distributed at intervals.

10. An injection mold, characterized in that: include: The base body is provided with an upper mold and a lower mold that cooperate with each other, and a cavity for molding plastic products is formed between the upper mold and the lower mold; An automatic water-cutting mechanism is the automatic water-cutting mechanism according to any one of claims 1 to 9, wherein the seat body has a cavity located below the lower mold, and the automatic water-cutting mechanism is arranged in the cavity.

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