Injection molding machine and hot runner adapter assembly thereof

Abstract

The present application relates to an injection molding machine and a hot runner adapter assembly thereof, wherein a first adapter is used to be installed on a first mold, and the first adapter is provided with a first docking portion and a first hot runner running through the first docking portion. A nozzle sleeve is connected to the first adapter and communicated with the first hot runner, and the nozzle sleeve is used to connect with the nozzle of the injection seat. A second adapter is used to be installed on a second mold, and the second adapter is provided with a second docking portion that docks with the first docking portion and a second hot runner running through the second docking portion, and the second hot runner is used to communicate with the cavity of the mold body. When the second docking portion is docked with the first docking portion, the first hot runner is connected with the second hot runner. During the mold closing and opening process, there is no need to move the injection seat forward and backward as in the related art. The injection seat can always be in a stationary state, and the nozzle remains docked and connected with the nozzle sleeve on the first adapter, thereby simplifying the equipment operation, saving the production cycle, improving production efficiency, and avoiding material waste.

Description

Technical Field

[0001] The present application relates to the technical field of injection molding machines, and in particular to an injection molding machine and a hot runner adapter assembly thereof. Background Art

[0002] Injection molding machines, also known as injection molding machines or injection machines, are the primary molding equipment used to create plastic products of various shapes from thermoplastics or thermosetting plastics using plastic molding molds. They are available in vertical, horizontal, and all-electric models. The injection molding machine heats the plastic and, using the thrust of a screw (or plunger), applies high pressure to the plasticized, molten (i.e., viscous) plastic and injects it into a closed mold cavity. The plastic is ejected and fills the mold cavity, where it solidifies and sets into shape to produce the finished product.

[0003] In the related art, an injection molding machine includes a mold, which comprises a lower mold and an upper mold that can move toward or away from the lower mold. The injection molding machine also includes an adapter plate mounted on the upper mold and formed with a hot runner, and a nozzle sleeve connected to the adapter plate. During each production cycle, the injection molding machine's ejector seat must move forward and backward. This is because each time the injection molding machine opens the mold, the ejector seat's nozzle must move backward, clearing the mold's nozzle sleeve (also known as the sprue sleeve). Otherwise, when the mold opens, the ejector seat interferes with the mold and is pulled and deformed by the mold. When the mold closes, the ejector seat must move forward, with its nozzle pressing against the nozzle sleeve. Otherwise, material leakage occurs during injection, preventing the material in the barrel from being properly injected into the mold. However, the ejector seat must move forward and backward for each cycle, taking at least three seconds to complete, resulting in low production efficiency. Furthermore, when the ejector seat retreats, the nozzle leaves the nozzle sleeve, causing material flow around the nozzle, resulting in material waste.

[0004] Of course, when the adapter plate is installed in the lower mold, the ejector seat directly connects to the hot runner in the adapter plate, eliminating the need for forward and backward movement, which improves efficiency. However, placing the hot runner in the lower mold will result in a thicker lower mold, making it difficult to manually place glass and accessories. It will also cause the lower mold cavity temperature to rise, which can easily cause color variations in the product's appearance, significantly reducing feasibility. Summary of the Invention

[0005] Based on this, it is necessary to overcome the defects of the prior art and provide an injection molding machine and a hot runner adapter assembly thereof, which can improve production efficiency and reduce material waste.

[0006] A hot runner adapter assembly for an injection molding machine, for installation on a mold body of the injection molding machine, wherein the mold body includes a first mold and a second mold capable of moving toward or away from the first mold. The hot runner adapter assembly for the injection molding machine includes:

[0007] a first adapter, the first adapter being used for being mounted on the first mold, the first adapter being provided with a first docking portion and a first hot runner penetrating the first docking portion;

[0008] A nozzle sleeve, the nozzle sleeve is connected to the first adapter and communicates with the first hot runner, and the nozzle sleeve is used to connect to the nozzle of the injection seat; and

[0009] The second adapter is used to be installed on the second mold. The second adapter is provided with a second docking portion that is docked with the first docking portion and a second hot runner that passes through the second docking portion. The second hot runner is used to communicate with the cavity of the mold body. When the second docking portion is docked with the first docking portion, the first hot runner is connected to the second hot runner.

[0010] In one embodiment, the first docking portion is provided with a first docking surface, and the second docking portion is provided with a second docking surface abutting against the first docking surface; the first hot runner passes through the first docking surface, and the second hot runner passes through the second docking surface.

[0011] In one embodiment, the first docking surface includes a first sealing surface and a first avoidance surface circumferentially connected to the periphery of the first sealing surface, and the first hot runner passes through the first sealing surface; the second docking surface includes a second sealing surface and a second avoidance surface circumferentially connected to the periphery of the second sealing surface, and the second hot runner passes through the second sealing surface; when the second docking portion is docked with the first docking portion, the first sealing surface and the second sealing surface are tightly fitted together, and a gap is formed between the first avoidance surface and the second avoidance surface.

[0012] In one embodiment, a straight line passing through the geometric center of the first sealing surface intersects with a contour line of the first sealing surface to obtain two first intersection points, and a distance L between the two first intersection points is ≥5 mm; and / or a distance S between the first avoidance surface and the second avoidance surface is 0.5 mm to 1.0 mm.

[0013] In one embodiment, the radial cross-sectional profile of the first docking portion and the radial cross-sectional profile of the second docking portion are both T-shaped, circular arc-shaped, or elliptical arc-shaped.

[0014] In one embodiment, the first avoidance surface includes a first avoidance portion that is disposed at an obtuse angle to and connected to the first sealing surface; the second avoidance surface includes a second avoidance portion that is disposed at an obtuse angle to and connected to the second sealing surface.

[0015] In one embodiment, an included angle a between the first avoidance portion and the first sealing surface is ≥95°; an included angle b between the second avoidance portion and the second sealing surface is ≥95°.

[0016] In one embodiment, the first avoidance surface further includes a third avoidance portion parallel to the first sealing surface and connected to the first avoidance portion; the second avoidance surface further includes a fourth avoidance portion parallel to the second sealing surface and connected to the second avoidance portion.

[0017] In one embodiment, the first hot runner includes a first main channel and a first docking channel sequentially connected along the material flow direction, and the inner diameter of the first main channel is larger than the inner diameter of the first docking channel; the second hot runner includes a second docking channel and a second main channel sequentially connected along the material flow direction, and the inner diameter of the second main channel is larger than the inner diameter of the second docking channel; the first docking channel and the second docking channel are docked and connected.

[0018] In one embodiment, the inner diameter D1 of the first docking channel is smaller than the inner diameter D2 of the second docking channel; wherein D2-D1≥0.5mm.

[0019] In one embodiment, the inner diameter D1 of the first docking channel is 2 mm to 6.5 mm, and the length L1 of the first docking channel is 3 mm to 8 mm; the inner diameter D2 of the second docking channel is 2.5 mm to 7 mm, and the length L2 of the first docking channel is 3 mm to 10 mm.

[0020] In one embodiment, the first hot runner further includes a first transition channel connected between the first main channel and the first docking channel, and the inner diameter of the first transition channel tends to gradually decrease along the flow direction of the material; the second hot runner further includes a second transition channel connected between the second main channel and the second docking channel, and the inner diameter of the second transition channel tends to gradually increase along the flow direction of the material.

[0021] In one embodiment, the first main channel includes a first transverse channel and a first vertical channel that are sequentially connected along the flow direction of the material, the first transverse channel is connected to the nozzle sleeve, and the first vertical channel is connected to the first docking channel.

[0022] In one embodiment, the second main channel includes a second vertical channel and a second transverse channel that are sequentially connected along the flow direction of the material, the second vertical channel is connected to the second docking channel, and the second transverse channel is connected to the mold cavity.

[0023] In one embodiment, the hardness of the first adapter and the second adapter is set to 50HRC to 56HRC.

[0024] An injection molding machine includes the hot runner adapter assembly of the injection molding machine and a mold body, wherein the first adapter is used to be installed on the first mold, and the second adapter is used to be installed on the second mold.

[0025] In one embodiment, the first mold is a lower mold, and the second mold is an upper mold.

[0026] The above-mentioned injection molding machine and its hot runner adapter assembly, during use, when the second mold moves toward and closes the first mold to close the mold, the second mold can synchronously drive the second adapter to move toward and close to the first adapter, so that the second docking portion is docked and connected with the first docking portion, the first hot runner is connected with the second hot runner, and then the shooting seat performs the injection action, and the material ejected by the nozzle passes through the first hot runner and the second hot runner in turn into the interior of the mold cavity; when the material is formed in the mold cavity and the mold needs to be opened, the second mold moves away from the first mold, and can synchronously drive the second adapter to move away from the first adapter, and the second docking portion is separated from the first docking portion. It can be seen that during the process of closing and opening the mold, there is no need to move the shooting seat forward and backward as in the related art. The shooting seat can always be in a stationary state, and the nozzle and the nozzle sleeve on the first adapter remain docked and connected, thereby simplifying the equipment operation, saving the production cycle, improving production efficiency, and avoiding material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of a hot runner adapter assembly for an injection molding machine according to one embodiment of the present application.

[0028] Figure 2 for Figure 1 An enlarged view of the structure at A in the shown structure.

[0029] Figure 3 for Figure 1 A structural diagram of the structure shown when the first docking portion and the second docking portion are separated from each other.

[0030] Figure 4 This is a structural diagram of a hot runner adapter assembly for an injection molding machine according to another embodiment of the present application.

[0031] Figure 5 This is a structural diagram of an injection molding machine according to an embodiment of the present application.

[0032] 10. Hot runner adapter assembly; 11. First adapter; 111. First docking portion; 112. First hot runner; 1121. First main channel; 11211. First transverse channel; 11212. First vertical channel; 1122. First docking channel; 1123. First transition channel; 113. First docking surface; 1131. First sealing surface; 1132. First avoidance surface; 11321. First avoidance portion; 11322. Third avoidance portion; 12. Nozzle sleeve; 13. Second adapter; 131, second docking portion; 132, second hot runner; 1321, second main channel; 13211, second vertical channel; 13212, second transverse channel; 1322, second docking channel; 1323, second transition channel; 133, second docking surface; 1331, second sealing surface; 1332, second avoidance surface; 13321, second avoidance portion; 13322, fourth avoidance portion; 20, mold body; 21, first mold; 22, second mold. DETAILED DESCRIPTION

[0033] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0034] See Figure 1 、 Figure 2 and Figure 5 An embodiment of the present application provides a hot runner adapter assembly 10 for an injection molding machine, which is used to be installed on a mold body 20 of the injection molding machine. The mold body 20 includes a first mold 21 and a second mold 22 that can move toward or away from the first mold 21. The hot runner adapter assembly 10 for the injection molding machine includes: a first adapter 11, a nozzle sleeve 12, and a second adapter 13. The first adapter 11 is used to be installed on the first mold 21. The first adapter 11 is provided with a first docking portion 111 and a first hot runner 112 that passes through the first docking portion 111. The nozzle sleeve 12 is connected to the first adapter 11 and communicates with the first hot runner 112. The nozzle sleeve 12 is used to connect to the nozzle of the injection seat. The second adapter 13 is used to be installed on the second mold 22. The second adapter 13 is provided with a second docking portion 131 that docks with the first docking portion 111 and a second hot runner 132 that passes through the second docking portion 131. The second hot runner 132 is used to communicate with the cavity of the mold body 20. When the second docking portion 131 is docked with the first docking portion 111, the first hot runner 112 is communicated with the second hot runner 132.

[0035] During use of the hot runner adapter assembly 10 of the above-mentioned injection molding machine, when the second mold 22 moves toward and close to the first mold 21 for mold closing, the second mold 22 can synchronously drive the second adapter 13 to move toward and close to the first adapter 11, so that the second docking portion 131 is docked with the first docking portion 111, and the first hot runner 112 is connected to the second hot runner 132, and then the shooting seat performs the injection action, and the material ejected from the nozzle passes through the first hot runner 112 and the second hot runner 132 in turn into the interior of the mold cavity; when the material is formed in the mold cavity and the mold needs to be opened, the second mold 22 moves toward and away from the first mold 21, and can synchronously drive the second adapter 13 to move away from the first adapter 11, and the second docking portion 131 is separated from the first docking portion 111. It can be seen that during the mold closing and opening operations, there is no need to move the shooting seat forward and backward as in the related art. The shooting seat can always remain stationary, and the nozzle and the nozzle sleeve 12 on the first adapter 11 remain connected to each other, thereby simplifying the equipment operation, saving production cycles, improving production efficiency, and avoiding material waste.

[0036] See also Figure 2 and Figure 3 In one embodiment, the first docking portion 111 is provided with a first docking surface 113, and the second docking portion 131 is provided with a second docking surface 133 that abuts against the first docking surface 113. The first hot runner 112 extends through the first docking surface 113, specifically, for example, to the middle portion of the first docking surface 113, and the second hot runner 132 extends through the second docking surface 133, specifically, for example, to the middle portion of the second docking surface 133. In this way, when the first docking portion 111 and the second docking portion 131 are docked together, the first docking surface 113 and the second docking surface 133 abut against each other and are positioned with good stability. The first hot runner 112 and the second hot runner 132 can be connected to each other, preventing material from leaking out of the docking portion.

[0037] In some embodiments, the shapes and sizes of the first and second docking surfaces 113, 133 can be fully compatible, thereby achieving stability after docking, effectively preventing material leakage during casting, not affecting injection pressure, and ensuring long service life. Of course, the shapes and sizes of the first and second docking surfaces 113, 133 can be different and can be flexibly adjusted and configured according to actual needs, as long as they can prevent material leakage during casting and not affect injection pressure.

[0038] See also Figure 2 and Figure 3In one embodiment, the first docking surface 113 includes a first sealing surface 1131 and a first avoidance surface 1132 circumferentially connected to the periphery of the first sealing surface 1131. The first hot runner 112 passes through the first sealing surface 1131, and specifically, for example, passes through the middle portion of the first sealing surface 1131. In addition, the second docking surface 133 includes a second sealing surface 1331 and a second avoidance surface 1332 circumferentially connected to the periphery of the second sealing surface 1331. The second hot runner 132 passes through the second sealing surface 1331, and specifically, for example, passes through the middle portion of the second sealing surface 1331. When the second docking portion 131 is docked with the first docking portion 111, the first sealing surface 1131 and the second sealing surface 1331 are tightly fitted together, and a gap is formed between the first avoidance surface 1132 and the second avoidance surface 1332. In this way, on the one hand, since the first sealing surface 1131 and the second sealing surface 1331 are tightly fitted together, material leakage can be effectively prevented, injection pressure will not be affected, and long-term service life can be guaranteed; on the other hand, there is a gap between the first avoidance surface 1132 and the second avoidance surface 1332, that is, the two are not in direct contact, so it will be mainly the first sealing surface 1131 and the second sealing surface 1331 that bear the pressure between the first docking part 111 and the second docking part 131, which can help to make the first sealing surface 1131 and the second sealing surface 1331 tightly fitted together; in addition, the material remaining at the docking position can be discharged outward in time through the gap between the first avoidance surface 1132 and the second avoidance surface 1332 under the action of the extrusion force.

[0039] In some embodiments, the contour shapes and sizes of the first sealing surface 1131 and the second sealing surface 1331 are exactly the same; they can also be different, for example, the size of the first sealing surface 1131 is smaller than the size of the second sealing surface 1331, or the size of the first sealing surface 1131 is larger than the size of the second sealing surface 1331.

[0040] It should be noted that the middle portion of the abutment surface in this embodiment refers to, for example, the geometric center of the abutment surface, or a position close to the geometric center. In other words, the center of the flow channel can be consistent with the geometric center of the abutment surface, or can have a predetermined deviation from the geometric center of the abutment surface.

[0041] Similarly, the middle portion of the sealing surface in this embodiment refers to, for example, the geometric center of the sealing surface, or a position close to its geometric center. In other words, the center of the flow channel can be consistent with the geometric center of the sealing surface, or can have a predetermined deviation from the geometric center of the sealing surface.

[0042] See also Figure 2 and Figure 3In some embodiments, the first sealing surface 1131 and the second sealing surface 1331 are both configured as flat surfaces, so that when the two are attached together, they have a high degree of tightness. Of course, the first sealing surface 1131 and the second sealing surface 1331 can also be configured as curved surfaces, for example, and adapt to each other, and can also achieve a tight attachment.

[0043] See also Figure 2 and Figure 3 In one embodiment, a straight line passing through the geometric center of the first sealing surface 1131 intersects with the contour line of the first sealing surface 1131 to obtain two first intersection points, and the distance L between the two first intersection points is ≥5 mm. Similarly, a straight line passing through the geometric center of the second sealing surface 1331 intersects with the contour line of the second sealing surface 1331 to obtain two second intersection points, and the distance L between the two second intersection points is ≥5 mm. Specifically, when the first sealing surface 1131 and the second sealing surface 1331 are configured as a circle, for example, the distance L corresponds to the diameter of the circle; when the first sealing surface 1131 and the second sealing surface 1331 are configured as an ellipse, for example, the distance L corresponds to the short axis of the ellipse; when the first sealing surface 1131 and the second sealing surface 1331 are configured as a rectangle, for example, the distance L corresponds to the length of the short side of the rectangle. In this way, the distance L between the two first intersection points is larger, which can make the area of ​​the tightly fitting surface between the first sealing surface 1131 and the second sealing surface 1331 larger, thereby effectively preventing material casting leakage, not affecting the injection pressure and ensuring a long service life.

[0044] In some embodiments, the spacing S between the first avoidance surface 1132 and the second avoidance surface 1332 includes but is not limited to 0.5 mm to 1.0 mm, specifically for example 0.5 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, etc., and can be flexibly adjusted and set according to actual needs.

[0045] In one embodiment, the radial cross-sectional profiles of the first docking portion 111 and the second docking portion 131 include but are not limited to regular shapes such as T-shape, circular arc shape, elliptical arc shape, and other irregular shapes.

[0046] See also Figure 4 In some embodiments, when the radial cross-sectional profiles of the first docking portion 111 and the second docking portion 131 are both arc-shaped, that is, the first docking surface 113 and the second docking surface 133 are both spherical. Specifically, the spherical radius of the first docking surface 113 is smaller than the spherical radius of the second docking surface 133.

[0047] Please refer to Figure 2 and Figure 3In one embodiment, the first avoidance surface 1132 includes a first avoidance portion 11321 that is arranged at an obtuse angle to and connected to the first sealing surface 1131. The second avoidance surface 1332 includes a second avoidance portion 13321 that is arranged at an obtuse angle to and connected to the second sealing surface 1331. Optionally, the angle a between the first avoidance portion 11321 and the first sealing surface 1131 is ≥95°, specifically, for example, 95°, 100°, 110°, 120°, 150°, etc. In addition, the angle b between the second avoidance portion 13321 and the second sealing surface 1331 is ≥95°, specifically, for example, 95°, 100°, 110°, 120°, 150°, etc. In this way, the demoulding action can be facilitated, and jamming during the demoulding process can be avoided, thereby extending the service life.

[0048] See also Figure 2 and Figure 3 In one embodiment, the first avoidance surface 1132 further includes a third avoidance portion 11322 parallel to the first sealing surface 1131 and connected to the first avoidance portion 11321. Furthermore, the second avoidance surface 1332 further includes a fourth avoidance portion 13322 parallel to the second sealing surface 1331 and connected to the second avoidance portion 13321. The first avoidance portion 11321 corresponds to the second avoidance portion 13321 and is spaced apart. Furthermore, the third avoidance portion 11322 corresponds to the fourth avoidance portion 13322 and is spaced apart.

[0049] See also Figure 2 and Figure 3 In one embodiment, the first hot runner 112 includes a first main channel 1121 and a first docking channel 1122 that are sequentially connected along the material flow direction. The inner diameter of the first main channel 1121 is larger than the inner diameter D1 of the first docking channel 1122. In addition, the second hot runner 132 includes a second docking channel 1322 and a second main channel 1321 that are sequentially connected along the material flow direction. The inner diameter of the second main channel 1321 is larger than the inner diameter D2 of the second docking channel 1322. The first docking channel 1122 and the second docking channel 1322 are dockingly connected. In this way, the docking connection between the first hot runner 112 and the second hot runner 132 is achieved by docking the first docking channel 1122 with a smaller inner diameter with the second docking channel 1322 with a smaller inner diameter. Compared with the method of directly connecting the first main channel 1121 and the second main channel 1321, it can reduce material casting and the occurrence of cold materials and blockage defects.

[0050] In one embodiment, the inner diameter D1 of the first docking channel 1122 is smaller than the inner diameter D2 of the second docking channel 1322, where D2 - D1 ≥ 0.5 mm. This facilitates smooth material flow from the first docking channel 1122 into the second docking channel 1322, minimizing material flow problems and the occurrence of cold material and blockage.

[0051] In some embodiments, the inner diameter D1 of the first docking channel 1122 includes, but is not limited to, 2 mm to 6.5 mm, specifically, 2 mm, 2.5 mm, 3 mm, 5 mm, 6.5 mm, etc. The first docking channel 1122 is, for example, a straight channel, and the length L1 of the first docking channel 1122 is, but is not limited to, 3 mm to 8 mm, specifically, 3 mm, 4 mm, 5 mm, 6 mm, or 8 mm, etc. Furthermore, the inner diameter D2 of the second docking channel 1322 includes, but is not limited to, 2.5 mm to 7 mm, specifically, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 6 mm, 7 mm, etc. The second docking channel 1322 is, for example, a straight channel, and the length L2 of the first docking channel 1122 is, but is not limited to, 3 mm to 10 mm, specifically, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, or 10 mm, etc. In this way, the inner diameter and length of the docking channel are both appropriately sized, the injection pressure loss of the material is minimized, and the material casting, cold slug, and clogging defects are less obvious.

[0052] Among them, after a large amount of test data, it is known that when the inner diameter of the first docking channel 1122 and the second docking channel 1322 is too small, for example, the inner diameter D1 is less than 2 mm, and the inner diameter D2 is less than 2.5 mm, the injection pressure loss will increase, thereby affecting the injection molding pressure holding process effect; on the contrary, when the inner diameter of the first docking channel 1122 and the second docking channel 1322 is too large, for example, the inner diameter D1 is greater than 6.5 mm, and the inner diameter D2 is greater than 7 mm, it will easily lead to material casting, cold material and blockage defects.

[0053] In one embodiment, the first hot runner 112 further includes a first transition channel 1123 connected between the first main channel 1121 and the first docking channel 1122. Specifically, the inner diameter of the first transition channel 1123 gradually decreases along the material flow direction. Furthermore, the second hot runner 132 further includes a second transition channel 1323 connected between the second main channel 1321 and the second docking channel 1322. Specifically, the inner diameter of the second transition channel 1323 gradually increases along the material flow direction.

[0054] In one embodiment, the first main channel 1121 includes a first transverse channel 11211 and a first vertical channel 11212, which are sequentially connected along the material flow direction. The first transverse channel 11211 is connected to the nozzle sleeve 12, and the first vertical channel 11212 is connected to the first docking channel 1122. Thus, when the nozzle seat injects material, the material is ejected through the nozzle, sequentially entering the first transverse channel 11211, the first vertical channel 11212, and the first docking channel 1122, and then entering the second hot runner 132.

[0055] The first vertical channel 11212 and the first transverse channel 11211 are connected and are, for example, arranged in an L-shape or a T-shape.

[0056] In one embodiment, the second main channel 1321 includes a second vertical channel 13211 and a second transverse channel 13212 that are sequentially connected along the flow direction of the material. The second vertical channel 13211 is connected to the second docking channel 1322, and the second transverse channel 13212 is connected to the mold cavity.

[0057] The second vertical channel 13211 and the second transverse channel 13212 are connected and are, for example, arranged in an L-shape or a T-shape.

[0058] In one embodiment, the hardness of both the first adapter 11 and the second adapter 13 includes, but is not limited to, a setting of 50HRC to 56HRC, specifically, 50HRC, 52HRC, 54HRC, 56HRC, and so on. Thus, the hardness of the first adapter 11 and the second adapter 13 is appropriately set, facilitating the processing and manufacturing of the adapter assembly while also being less susceptible to deformation and wear and ensuring precise alignment. In other words, this prevents the adapter assembly from being too hard, which could hinder mold processing, while also preventing the adapter assembly from being too hard, which could shorten its lifespan, and preventing deformation and wear at the mating locations, which could lead to improper mating.

[0059] See also Figure 5 In one embodiment, an injection molding machine includes the hot runner adapter assembly 10 of the injection molding machine of any of the above embodiments, and also includes a mold body 20, a first adapter 11 for being installed on the first mold 21, and a second adapter 13 for being installed on the second mold 22.

[0060] During use of the above-mentioned injection molding machine, when the second mold 22 moves toward and close to the first mold 21 for mold closing, the second mold 22 can synchronously drive the second adapter 13 to move toward and close to the first adapter 11, so that the second docking portion 131 is docked with the first docking portion 111, and the first hot runner 112 is connected to the second hot runner 132, and then the shooting seat performs an injection action, and the material ejected from the nozzle passes through the first hot runner 112 and the second hot runner 132 in turn into the interior of the mold cavity; when the material is formed in the mold cavity and the mold needs to be opened, the second mold 22 moves toward and away from the first mold 21, and can synchronously drive the second adapter 13 to move away from the first adapter 11, and the second docking portion 131 is separated from the first docking portion 111. It can be seen that during the mold closing and opening process, there is no need to move the shooting seat forward and backward as in the related art. The shooting seat can always remain in a stationary state, and the nozzle and the nozzle sleeve 12 on the first adapter 11 remain connected to each other, thereby simplifying the equipment operation, saving production cycle, improving production efficiency, and avoiding material waste.

[0061] In one embodiment, the first mold 21 is a lower mold, and the second mold 22 is an upper mold.

[0062] The terms "center", "vertical", "lateral", "length", "width", "up", "down", "front", "back", "top", "bottom", "inside", "outside", "axial", "radial", etc. in the description of this application indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings. They 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 operate in a specific orientation. Therefore, they should not be understood as limiting this application.

[0063] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0064] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A hot runner adapter assembly for an injection molding machine, for installation on a mold body of the injection molding machine, wherein the mold body comprises a first mold and a second mold capable of moving toward or away from the first mold, characterized in that: The hot runner adapter assembly of the injection molding machine includes: a first adapter, the first adapter being used for being mounted on the first mold, the first adapter being provided with a first docking portion and a first hot runner penetrating the first docking portion; A nozzle sleeve, the nozzle sleeve is connected to the first adapter and communicates with the first hot runner, and the nozzle sleeve is used to connect to the nozzle of the injection seat; and The second adapter is used to be installed on the second mold. The second adapter is provided with a second docking portion that is docked with the first docking portion and a second hot runner that passes through the second docking portion. The second hot runner is used to communicate with the cavity of the mold body. When the second docking portion is docked with the first docking portion, the first hot runner is connected to the second hot runner.

2. The hot runner adapter assembly of the injection molding machine according to claim 1, characterized in that: The first docking portion is provided with a first docking surface, and the second docking portion is provided with a second docking surface abutting against the first docking surface; the first hot runner passes through the first docking surface, and the second hot runner passes through the second docking surface.

3. The hot runner adapter assembly of the injection molding machine according to claim 2, characterized in that: The first docking surface includes a first sealing surface and a first avoidance surface circumferentially connected to the periphery of the first sealing surface, and the first hot runner passes through the first sealing surface; the second docking surface includes a second sealing surface and a second avoidance surface circumferentially connected to the periphery of the second sealing surface, and the second hot runner passes through the second sealing surface; when the second docking portion is docked with the first docking portion, the first sealing surface and the second sealing surface are tightly fitted together, and a gap is formed between the first avoidance surface and the second avoidance surface.

4. The hot runner adapter assembly for an injection molding machine according to claim 3, characterized in that: A straight line passing through the geometric center of the first sealing surface intersects with the contour line of the first sealing surface to obtain two first intersection points, and the distance L between the two first intersection points is ≥5mm; and / or, the distance S between the first avoidance surface and the second avoidance surface is 0.5mm to 1.0mm.

5. The hot runner adapter assembly for an injection molding machine according to claim 3, characterized in that: The radial cross-sectional profiles of the first docking portion and the second docking portion are both T-shaped, circular arc-shaped or elliptical arc-shaped.

6. The hot runner adapter assembly for an injection molding machine according to claim 3, characterized in that: The first avoidance surface includes a first avoidance portion that is arranged at an obtuse angle to and connected to the first sealing surface; the second avoidance surface includes a second avoidance portion that is arranged at an obtuse angle to and connected to the second sealing surface.

7. The hot runner adapter assembly for an injection molding machine according to claim 6, characterized in that: An included angle a between the first avoidance portion and the first sealing surface is ≥95°; an included angle b between the second avoidance portion and the second sealing surface is ≥95°.

8. The hot runner adapter assembly for an injection molding machine according to claim 6, characterized in that: The first avoidance surface further includes a third avoidance portion parallel to the first material sealing surface and connected to the first avoidance portion; the second avoidance surface further includes a fourth avoidance portion parallel to the second material sealing surface and connected to the second avoidance portion.

9. The hot runner adapter assembly for an injection molding machine according to claim 3, characterized in that: The first hot runner includes a first main channel and a first docking channel which are sequentially connected along the material flow direction, and the inner diameter of the first main channel is larger than the inner diameter of the first docking channel; the second hot runner includes a second docking channel and a second main channel which are sequentially connected along the material flow direction, and the inner diameter of the second main channel is larger than the inner diameter of the second docking channel; the first docking channel and the second docking channel are docked and connected.

10. The hot runner adapter assembly of the injection molding machine according to claim 9, characterized in that: The inner diameter D1 of the first docking channel is smaller than the inner diameter D2 of the second docking channel; wherein D2-D1≥0.5mm.

11. The hot runner adapter assembly for an injection molding machine according to claim 9, characterized in that: The inner diameter D1 of the first docking channel is 2mm to 6.5mm, and the length L1 of the first docking channel is 3mm to 8mm; the inner diameter D2 of the second docking channel is 2.5mm to 7mm, and the length L2 of the first docking channel is 3mm to 10mm.

12. The hot runner adapter assembly of the injection molding machine according to claim 9, characterized in that: The first hot runner also includes a first transition channel connected between the first main channel and the first docking channel, and the inner diameter of the first transition channel tends to gradually decrease along the flow direction of the material; the second hot runner also includes a second transition channel connected between the second main channel and the second docking channel, and the inner diameter of the second transition channel tends to gradually increase along the flow direction of the material.

13. The hot runner adapter assembly of the injection molding machine according to claim 9, characterized in that: The first main channel includes a first transverse channel and a first vertical channel that are sequentially connected along the flow direction of the material. The first transverse channel is connected to the nozzle sleeve, and the first vertical channel is connected to the first docking channel.

14. The hot runner adapter assembly of the injection molding machine according to claim 9, characterized in that: The second main channel includes a second vertical channel and a second transverse channel that are sequentially connected along the flow direction of the material. The second vertical channel is connected to the second docking channel, and the second transverse channel is connected to the mold cavity.

15. The hot runner adapter assembly for an injection molding machine according to any one of claims 1 to 14, characterized in that: The hardness of the first adapter and the second adapter is set to 50HRC to 56HRC.

16. An injection molding machine, characterized in that: The injection molding machine includes the hot runner adapter assembly of the injection molding machine according to any one of claims 1 to 15, and also includes a mold body, the first adapter is used to be installed on the first mold, and the second adapter is used to be installed on the second mold.

17. The injection molding machine according to claim 16, characterized in that The first mold is a lower mold, and the second mold is an upper mold.

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