Hot runner system for thin-wall part

Abstract

The utility model discloses a hot runner system for a thin-wall part, which relates to the technical field of hot runners and comprises a shell component, a splitter plate, a main nozzle, a plurality of hot nozzles, a cavity, a plurality of telescopic cylinders and a water jacket component are arranged in the shell component, the main nozzle and the hot nozzles are respectively mounted at two ends of the splitter plate, the hot nozzles are connected with the cavity, and valve needles are sleeved in the hot nozzles. The valve needle is connected with the telescopic cylinder, the hot nozzle extends into the water jacket assembly, a horizontal sub-runner is arranged in the splitter plate, an inclined sub-runner is arranged in the hot nozzle, and the main injection nozzle is communicated with the hot nozzle sequentially through the horizontal sub-runner and the inclined sub-runner; and after the plastic material sequentially passes through the horizontal sub-runner and the inclined sub-runner from the main injection nozzle and enters the hot nozzle, the telescopic cylinder drives the valve needle to rise in the hot nozzle, so that the hot nozzle is communicated with the cavity, and the plastic material flows into the cavity to generate a thin-wall part product. The mold can be suitable for mass production of thin-wall products, can reduce the forming risk, ensures that the products are formed stably, ensures that the products do not have different colors, and ensures the yield.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot runner technology field especially relates to a hot runner system for thin -walled part. BACKGROUND

[0002] Thin -walled part product has the characteristics such as easy deformation, big forming pressure, temperature control is not good and is easy to discolor because the wall thickness is very thin. The traditional hot runner system usually adopts the mode of side glue feeding cold runner switching, and this glue feeding mode cannot guarantee the forming stability of the product when producing the thin -walled part product, and there is a problem of color difference when the shear force is too large, so the forming risk is high, and the good product rate is low.

[0003] Therefore, it is necessary to develop a hot runner system for such thin -walled parts to reduce the forming risk, ensure that the product has no color difference, and ensure the good product rate. INNOVATION CONTENT

[0004] In view of the above-mentioned deficiencies existing at present, the utility model provides a hot runner system for thin -walled part can be applicable to thin -walled product mass production, can reduce the forming risk, ensure that the product forms stably, ensure that the product has no color difference, and ensure the good product rate.

[0005] To achieve the above object, the embodiment of the utility model adopts the following technical scheme:

[0006] A hot runner system for thin -walled part, including shell assembly, the shell assembly is equipped with the shunt plate, the main jet, a plurality of hot nozzles, the cavity, a plurality of telescopic cylinders, the main jet, hot nozzle is installed at the both ends of shunt plate respectively, and hot nozzle is connected with cavity, the valve needle is set in the hot nozzle, the valve needle is connected with telescopic cylinder, the shell assembly is also equipped with water jacket assembly, the hot nozzle is inserted into water jacket assembly, the shunt plate is equipped with horizontal shunt, the hot nozzle is equipped with inclined shunt, and the main jet is communicated with hot nozzle through horizontal shunt, inclined shunt in proper order;When plastic material enters the hot nozzle from the main jet through horizontal shunt, inclined shunt in proper order, the valve needle is driven in the hot nozzle by telescopic cylinder and rises, so that the hot nozzle is communicated with the cavity, so that plastic material flows into the cavity, and thin -walled part product is generated.

[0007] According to one aspect of the utility model, the water jacket assembly includes a water jacket block and a water jacket insert, and the hot nozzle is inserted into the water jacket block and the water jacket insert in sequence.

[0008] According to one aspect of the utility model, the water jacket insert is provided with a nozzle sleeve, and the hot nozzle is inserted into the water jacket block and the nozzle sleeve in sequence.

[0009] According to one aspect of the utility model, the valve needle is equipped with a limiting area, the nozzle is equipped with a limiting positioning area, the limiting area and the limiting positioning area are matched to control the depth of the valve needle into the product and ensure the height of the glue.

[0010] According to one aspect of the utility model, the hot nozzle is equipped with a valve sleeve, the valve sleeve is equipped with an exhaust groove, and the valve needle sleeve is arranged in the valve sleeve.

[0011] According to one aspect of the utility model, the hot nozzle is embedded with a heating wire, and the heating wire is wound on the hot nozzle.

[0012] According to one aspect of the utility model, the hot nozzle is wrapped with a copper sleeve, the copper sleeve is equipped with a groove group, and the heating wire is embedded in the groove group.

[0013] According to one aspect of the utility model, the shell assembly is equipped with a socket and a solenoid valve, the socket is connected with the heating wire, and the solenoid valve is connected with the telescopic cylinder.

[0014] According to one aspect of the utility model, the shell assembly is equipped with a socket and a solenoid valve, the socket is connected with the heating wire, and the solenoid valve is connected with the telescopic cylinder.

[0015] According to one aspect of the utility model, the shell assembly comprises a first mold plate, a second mold plate and a bottom plate connected in sequence from top to bottom, the main nozzle and the telescopic cylinder are arranged in the first mold plate, the shunt plate and the hot nozzle are arranged in the second mold plate, the cavity and the water jacket assembly are arranged in the bottom plate, and the legs are fixed around the bottom plate.

[0016] The utility model discloses the advantages of the implementation: when the plastic material passes through the horizontal shunt channel and the inclined shunt channel into the hot nozzle in sequence from the main nozzle, the valve needle is driven to ascend in the hot nozzle by the telescopic cylinder, so that the hot nozzle is communicated with the cavity, and the plastic material flows into the cavity to generate the thin-walled product. By arranging the inclined shunt channel and the water jacket assembly, the system can be suitable for mass production of thin-walled products, can reduce the molding risk, ensure the product molding stability, ensure that the products have no color difference, and ensure the yield; by increasing the limiting area at the bottom end of the valve needle, the system can prevent the product sprue burr caused by error, can ensure the stability of molding, and ensure the yield; by arranging the valve sleeve and the exhaust groove, the system can ensure the concentricity of the valve needle and facilitate its installation, ensure the uniformity of product molding, and ensure the glue amount in the high-speed high-pressure molding environment of the product. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 It is a three-dimensional structure schematic view of the present application.

[0019] Figure 2 It is a first local structure schematic view of the present application.

[0020] Figure 3 It is a second local structure schematic view of the present application.

[0021] Figure 4 It is a first local sectional structure schematic view of the present application.

[0022] Figure 5 It is a second local sectional structure schematic view of the present application.

[0023] Figure 6 It is a local sectional enlarged structure schematic view of the present application.

[0024] Figure 7 It is a local structure schematic view of the hot nozzle of the present application.

[0025] The names corresponding to the serial numbers in the drawings are as follows:

[0026] 1, housing assembly; 2, flow distribution plate; 3, main nozzle; 4, hot nozzle; 5, water jacket assembly; 51, water jacket pressing block; 52, water jacket insert; 6, telescopic cylinder; 7, inclined flow distribution channel; 8, nozzle sleeve; 9, limiting area; 10, limiting positioning area; 11, socket; 12, supporting leg; 13, first template; 14, second template; 15, bottom plate; 16, copper sleeve; 17, valve needle; 18, cap product. DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts under the premise that no creative efforts are made, belong to the scope of protection of the present application. In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end" and the like are the positions or location relationships shown based on the drawings, and are merely for the convenience of describing the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements indicated must have a specific position, be constructed in a specific position and be operated, and thus cannot be understood as a limitation on the present application.

[0028] As shown in Figure 1 Figure 7 A hot runner system for thin-walled parts is used for a mold for mass production of thin-walled products. The system comprises a shell assembly 1, a support leg 12, a socket 11 and a solenoid valve, wherein the shell assembly 1 is provided with a flow distribution plate 2, a main nozzle 3, a plurality of hot nozzles 4, a water jacket assembly 5, a cavity (not shown in the figure), a plurality of telescopic cylinders 6 and a heating assembly. The shell assembly 1 comprises a first mold plate 13, a second mold plate 14 and a bottom plate 15 connected in sequence from top to bottom, all of which are substantially square plate structures. The support leg 12 is fixed around the bottom plate 15. The socket 11 and the solenoid valve are both installed on the side of the shell assembly 1, i.e. on the side of the first mold plate 13 and the second mold plate 14; wherein the socket 11 is connected with the heating assembly for controlling the heating temperature and the heating time; the solenoid valve is connected with the telescopic cylinder 6 for controlling the lifting thereof. The main nozzle 3 and the hot nozzle 4 are respectively installed on the upper and lower ends of the flow distribution plate 2, and the bottom of the hot nozzle 4 extends into the water jacket assembly 5 and is connected with the cavity. A valve needle 17 is sleeved in the hot nozzle 4, and the valve needle 17 is connected with the telescopic cylinder 6. The flow distribution plate 2 is provided with a horizontal flow distribution channel, and the hot nozzle 4 is provided with an inclined flow distribution channel 7 (as shown in Figure 4 Figure 7 The main nozzle 3 communicates with the hot nozzle 4 through the horizontal flow distribution channel and the inclined flow distribution channel 7 in sequence; the horizontal flow distribution channel is a bifurcated hole channel arranged horizontally, and the inclined flow distribution channel 7 is a hole channel with an acute angle with the axial direction of the hot nozzle 4 (or the length direction of the valve needle 17), and the horizontal flow distribution channel communicates with the inclined flow distribution channel 7. When the plastic material enters the hot nozzle 4 from the main nozzle 3 through the horizontal flow distribution channel and the inclined flow distribution channel 7 in sequence, the valve needle 17 is driven by the telescopic cylinder 6 to rise in the hot nozzle 4, so that the hot nozzle 4 communicates with the cavity, so that the plastic material flows into the cavity to generate a thin-walled part product.

[0029] ​​In actual applications, one thin-walled product targeted by this system is a transparent lid product 18, only 1mm thick and molded with 8 cavities. This product has thin walls, is easily deformed, and requires high molding pressure. Its transparent color can easily discolor due to poor temperature control. Traditional hot runner systems use side-feeding, which cannot guarantee stable molding of this product. Excessive shear force can also cause discoloration, and traditional side-feeding can also leave gate residue, requiring the removal of the sprue head. However, this system, designed for these special thin-walled products, utilizes a hot nozzle 4 (inclined runner 7) with oblique glue feeding, a customized heater (heating component), and a stable cooling component (water jacket component 5). This reduces molding risks, ensures a non-discoloring product, and guarantees a high yield rate.

[0030] In practical applications, such as Figure 3 、 Figure 5 As shown, the water jacket assembly 5 includes a water jacket block 51 and a water jacket insert 52 connected in an upper and lower manner. The water jacket block 51 is composed of a square flange block structure at the top and a rectangular block structure at the bottom. The water jacket insert 52 is an inverted quadrangular pyramid structure as a whole, which is a special-shaped ring part used to ensure cooling at the gate. It serves as a temperature control window for thin-walled products, preventing yellowing and decomposition of the material due to excessive temperature, ensuring that the product has no discoloration and stable molding. A nozzle sleeve 8 is installed in the middle position of the water jacket insert 52. The nozzle sleeve 8 is made of heat-treated steel to ensure strength. A separate nozzle sleeve 8 is also convenient for replacement during mass production. The bottom of the hot nozzle 4 extends into the water jacket block 51 and nozzle sleeve 8 in turn.

[0031] In practical applications, such as Figure 6 As shown, since the wall thickness of the product is very thin (such as 1 mm), a limiting area 9 is added to the bottom end of the valve needle 17, and a limiting positioning area 10 is provided at the bottom center of the nozzle sleeve 8. The limiting area 9 is coordinated with the limiting positioning area 10 (the limit is used to control the depth of the valve needle 17 extending into the product to ensure the accuracy of the glue injection height). Initially, a certain gap is left between the two. In this way, the height of the bottom end of the valve needle 17 can be effectively controlled to prevent product gate burrs caused by errors, thereby ensuring the stability of the molding and the yield rate.

[0032] In practical application, the valve sleeve (not shown in the figure) is arranged in the hot nozzle 4, and the valve needle 17 is sleeved in the valve sleeve; the valve sleeve is used for ensuring the concentricity of the valve needle 17 and the hot nozzle 4; the structure shape of the valve sleeve is matched with the internal structure shape of the hot nozzle 4 and the structure shape of the valve needle 17, and the valve sleeve is in the shape of a T-shaped sleeve or a columnar sleeve, and the bottom shape structure (for avoiding the inclined flow distribution channel 7) can be in the shape structure that a cylindrical bottom is inclinedly cut to remove a part. The valve sleeve is provided with an exhaust groove, so that the valve needle 17 is conveniently installed; the exhaust groove is a columnar hole, and a plurality of exhaust grooves can be arranged in the axial direction and the circumferential direction of the valve sleeve. By arranging the inclined flow distribution channel 7, the valve sleeve and the like, the concentricity of the valve needle 17 is ensured by the glue feeding mode, the uniformity of product forming is ensured, and the glue feeding amount in the high-speed and high-pressure forming environment of the product is ensured.

[0033] In practical application, the heating assembly includes a heating wire and a heating pipe and the like, and is used for heating plastic materials. The hot nozzle 4 is wrapped with a copper sleeve 16, and the copper sleeve 16 is provided with a continuous and spiral groove group. The heating wire is embedded in the groove group, and the heating wire is wound on the outer ring of the hot nozzle 4. The heating pipe is arranged on the flow distribution plate 2.

[0034] In practical application, the number and arrangement form of the hot nozzles 4 and the telescopic cylinders 6 are matched, and the hot nozzles 4 and the telescopic cylinders 6 are each eight, and are arranged in a rectangular array. The main nozzle 3 is located at the center of symmetry of the eight hot nozzles 4 or the eight telescopic cylinders 6. The flow distribution plate 2 is an integrally formed plate. With the main nozzle 3 in the center of the flow distribution plate 2 as a reference, the flow distribution plate 2 can be divided into a symmetrical left flow distribution plate region and a right flow distribution plate region, and the two regions are both in the shape of a U-shaped plate. One hot nozzle 4 is arranged at each corner of the left flow distribution plate region, and one hot nozzle 4 is arranged at each corner of the right flow distribution plate region. The main nozzle 3 and the telescopic cylinder 6 are arranged in the first mold plate 13. The flow distribution plate 2 and the hot nozzle 4 are arranged in the second mold plate 14, and the cavity and the water jacket assembly 5 are arranged in the bottom plate 15. The main nozzle 3 passes through the center of the first mold plate 13, and then is connected with the hot nozzle 4 provided with the inclined flow distribution channel 7 through the horizontal flow distribution channel in the flow distribution plate 2. The cylinder body end of the telescopic cylinder 6 is fixedly arranged in the first mold plate 13, and the telescopic cylinder 6 is connected with the valve needle 17 in the hot nozzle 4.

[0035] The utility model has the advantages that:

[0036] 1. By arranging the inclined flow distribution channel 7 and the water jacket assembly 5, the system can be applied to mass production of thin-walled products, can reduce the forming risk, ensure the stability of product forming, ensure that the products are free of color difference, and ensure the yield;

[0037] 2. By increasing the limiting region 9 at the bottom end of the valve needle 17, the system can prevent the product flash caused by errors, ensure the stability of forming, and ensure the yield;

[0038] 3. By setting the valve sleeve, exhaust groove, etc., the system can ensure the concentricity of the valve needle 17 while facilitating its installation, ensuring the uniformity of product molding, and ensuring the amount of glue into the high-speed high-pressure molding environment.

[0039] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes, combinations or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hot runner system for thin-walled parts, comprising a housing assembly (1), a manifold (2), a main nozzle (3), a plurality of hot nozzles (4), a cavity, a plurality of telescopic cylinders (6), the main nozzle (3) and the hot nozzles (4) being respectively installed at both ends of the manifold (2), the hot nozzles (4) being connected with the cavity, a valve needle (17) being sleeved in the hot nozzle (4), the valve needle (17) being connected with the telescopic cylinder (6), characterized in that, The shell assembly (1) is further provided with a water jacket assembly (5), the hot nozzle (4) extends into the water jacket assembly (5), the shunt plate (2) is provided with a horizontal shunt channel, the hot nozzle (4) is provided with an inclined shunt channel (7), and the main nozzle (3) is communicated with the hot nozzle (4) through the horizontal shunt channel and the inclined shunt channel (7) in sequence; when the plastic material enters the hot nozzle (4) from the main nozzle (3) through the horizontal shunt channel and the inclined shunt channel (7) in sequence, the valve needle (17) is driven to rise in the hot nozzle (4) by the telescopic cylinder (6), so that the hot nozzle (4) is communicated with the cavity, and the plastic material flows into the cavity to generate a thin-walled product.

2. The hot- runner system of claim 1, wherein The water jacket assembly (5) comprises a water jacket pressing block (51) and a water jacket insert (52), and the hot nozzle (4) extends into the water jacket pressing block (51) and the water jacket insert (52) in sequence.

3. The hot- runner system of claim 2, wherein The water jacket insert (52) is provided with a nozzle sleeve (8), and the hot nozzle (4) extends into the water jacket pressing block (51) and the nozzle sleeve (8) in sequence.

4. The hot- runner system of claim 3, wherein A limiting area (9) is arranged on the valve needle (17), a limiting positioning area (10) is arranged in the nozzle sleeve (8), and the limiting area (9) and the limiting positioning area (10) are arranged in cooperation to control the depth of the valve needle (17) extending into the product and ensure the accuracy of the glue inlet height.

5. The hot- runner system of claim 1, wherein The hot nozzle (4) is provided with a valve sleeve, the valve sleeve is provided with an exhaust groove, and the valve needle (17) is sleeved in the valve sleeve.

6. The hot- runner system of claim 1, wherein The hot nozzle (4) is embedded with a heating wire, and the heating wire is wound on the hot nozzle (4).

7. The hot-duct system of claim 6, wherein The hot nozzle (4) is wrapped with a copper sleeve (16), the copper sleeve (16) is provided with a groove group, and the heating wire is embedded in the groove group.

8. The hot-duct system of claim 6, wherein, The shell assembly (1) is provided with a socket (11) and an electromagnetic valve, the socket (11) is connected with the heating wire, and the electromagnetic valve is connected with the telescopic cylinder (6).

9. The hot runner system of any one of claims 1 to 8, wherein, Further comprising a support leg (12) fixed around the shell assembly (1).

10. The hot- runner system of claim 9, wherein The shell assembly (1) comprises a first mold plate (13), a second mold plate (14) and a bottom plate (15) connected in sequence from top to bottom, the main nozzle (3) and the telescopic cylinder (6) are arranged in the first mold plate (13), the shunt plate (2) and the hot nozzle (4) are arranged in the second mold plate (14), the cavity and the water jacket assembly (5) are arranged in the bottom plate (15), and the support leg (12) is fixed around the bottom plate (15).

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