Double-color injection molding mold for car air duct

Abstract

The utility model provides a double-color injection molding mold for an air duct of a car. A product cavity is formed by a sliding block assembly, a cavity insert and a core insert; the sliding block assembly comprises a hard rubber sliding block, a soft rubber sliding block and a blade insert. The ebonite sliding block, the adjacent cavity insert and the adjacent core insert form an ebonite cavity; the soft rubber sliding block, the adjacent cavity insert and the adjacent core insert form a soft rubber cavity; the blade insert is arranged at the junction of the hard rubber cavity and the soft rubber cavity and is arranged on one side of the soft rubber cavity; in addition, a set of injection system is additionally arranged beside the single-color injection molding machine; the hard rubber cavity is connected with an injection pipeline of an original injection system of the single-color injection molding machine, and the soft rubber cavity is connected with an injection pipeline of an additional injection system. The utility model has the beneficial technical effects that the processing of double-color injection molding parts can be completed in a single-color injection molding machine, and only one set of mold is needed; the production cost and the production period are effectively reduced, and the mold design is simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to car air duct two -color injection molding technology, especially to a car air duct two -color injection molding mold. BACKGROUND

[0002] Two -color injection molding is the most complex and most representative one of multi -component injection molding process, usually adopts two -color injection molding machine on two sets of moulds and carries out injection molding. Two -color injection molding machine usually needs two sets of moulds, and adopts rotating mechanism (bottom plate rotation or middle plate rotation) to realize the conversion of mould and injection mechanism. When injection molding first material, injection mechanism I runs, material is injected into mould I, and the first part of product is formed, at this time, some parts of the product that complete injection molding still remain in the mould cavity, and with the rotation of the bottom plate or the middle plate, move to the second material injection station, injection mechanism II runs, material is injected into mould II, and the second part of product is formed. In fact, so -called two -color injection molding more refers to the injection molding of two different material plastics, one material is hard, and the other material is soft. Therefore, the injection of the first material is called hard glue injection, and the injection of the second material is called soft glue injection. Similarly, the cavity for forming the first material is called hard glue cavity, and the cavity for forming the second material is called soft glue cavity. Car air duct is a typical two -color injection molding product (see attached Figure 1 , in the figure, a is hard glue, and b is soft glue), the demarcation line of the hard glue and the soft glue of the product is a toothed curve, and there are several steps on the curve, which increases the design difficulty of the two -color injection molding mold to some extent. It can be seen that the prior art two -color injection molding method needs special two -color injection molding machine and two sets of moulds, which increases the production cost, and the rotating mechanism is needed to realize the conversion of the mould and the injection mechanism in the injection process, which increases the injection molding cycle. For the product with complex hard and soft glue demarcation line, the mold design is also more difficult.

[0003] Obviously, the prior art two -color injection molding method has problems of high production cost, long production cycle and difficult mold design. SUMMARY

[0004] In order to solve the problems of high production cost, long production cycle and difficult mold design of the prior art two -color injection molding method, the utility model provides a car air duct two -color injection molding mold.

[0005] The utility model discloses a two-color injection molding die for a car air duct, which adopts a slider assembly, a cavity insert and a core insert to form a product cavity; the slider assembly includes a hard rubber slider, a soft rubber slider and a blade insert; the hard rubber slider and the adjacent cavity insert and the core insert form a hard rubber cavity; the soft rubber slider and the adjacent cavity insert and the core insert form a soft rubber cavity; the blade insert is arranged at the junction of the hard rubber cavity and the soft rubber cavity, and is arranged on one side of the soft rubber cavity; in addition, an injection system is added to the side of the single-color injection molding machine; the hard rubber cavity is connected to the injection pipeline of the original injection system of the single-color injection molding machine, and the soft rubber cavity is connected to the injection pipeline of the added injection system.

[0006] Preferably, the blade insert comprises a blade slider base, a blade insert, an oil cylinder and a travel switch; the oil cylinder and the travel switch are installed at the bottom of the blade slider base; and the blade insert is installed on the surface of the blade slider base.

[0007] Preferably, the blade insert is a combined structure, composed of five blades; and the upper end surfaces of the connections between the blades are all flat.

[0008] Preferably, a number of contour wear-resistant blocks are provided on the mating surface of the blade slider base and adjacent components. The contour wear-resistant blocks are rectangular metal blocks formed by grinding, made of DIN1.2767 / 45NiCrMo16 / X45NiCrMo4, with a heat treatment hardness of 285HB and a thickness of 8 to 10 mm.

[0009] Preferably, a number of contour wear-resistant blocks are evenly arranged on the mating surface of the blade and adjacent parts. The contour wear-resistant blocks are rectangular metal blocks formed by grinding, made of DIN1.2767 / 45NiCrMo16 / X45NiCrMo4, with a heat treatment hardness of 285HB and a thickness of 8 to 10 mm.

[0010] The beneficial technical effect of the double-color injection molding mold for the passenger car air duct of the utility model is that it can complete the processing of double-color injection molding parts on a single-color injection molding machine, and only requires one set of molds; it effectively reduces production costs and production cycles and simplifies mold design. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attachment Figure 1 A three-dimensional schematic diagram of a two-color injection-molded passenger car air duct;

[0012] Attachment Figure 2 This is a three-dimensional schematic diagram of the slider assembly of the double-color injection molding die for the passenger car air duct of the utility model;

[0013] Attachment Figure 3 It is a three-dimensional schematic diagram of the blade insert of the double-color injection molding mold of the utility model;

[0014] Figure 2 is a three-dimensional exploded view of the double-color injection molding die insert of the present application; Figure 4 Figure 3 is a three-dimensional exploded view of the double-color injection molding die slide block assembly of the present application;

[0015] Figure 4 is a three-dimensional view of the double-color injection molding die of the present application. Figure 5 Figure 5 is a three-dimensional view of the double-color injection molding die of the present application.

[0016] In the figure, 1 is a hard rubber slide block, 2 is a soft rubber slide block, 3 is a blade insert, 3-1 is a blade slide block base, 3-2 is a blade insert block, 3-2-1 to 3-2-5 are blades, 3-3 is an oil cylinder, 3-4 is a travel switch, 4 is an equal-height wear-resistant block, a is hard rubber, and b is soft rubber.

[0017] The double-color injection molding die for a car air duct of the present application will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0018] Referring to Figure 1, the double-color injection molding die for a car air duct of the present application is composed of a slide block assembly, a cavity insert, and a core insert. Figure 2 The slide block assembly includes a hard rubber slide block 1, a soft rubber slide block 2, and a blade insert 3. The hard rubber slide block and the adjacent cavity insert and core insert form a hard rubber cavity. The soft rubber slide block and the adjacent cavity insert and core insert form a soft rubber cavity. The blade insert is disposed at the junction of the hard rubber cavity and the soft rubber cavity and on one side of the soft rubber cavity. In addition, a set of injection systems is installed beside the single-color injection molding machine. The hard rubber cavity is connected to the injection line of the original injection system of the single-color injection molding machine, and the soft rubber cavity is connected to the injection line of the installed injection system. The double-color injection molding die for a car air duct of the present application is provided with a blade insert at the junction of the hard rubber cavity and the soft rubber cavity, and a set of injection systems is installed beside the single-color injection molding machine. When hard rubber is injected, the blade slide block is pushed inward by the oil cylinder to push a rubber wall thickness, and the blade insert, the hard rubber slide block, the cavity insert, and the front mold insert form a closed hard rubber cavity. The original injection system of the single-color injection molding machine injects rubber into the hard rubber cavity. After the hard rubber is formed, the blade insert is retracted by the oil cylinder by a wall thickness of rubber, at which time the injected and formed hard rubber, together with the soft rubber slide block, the cavity insert, and the front mold insert, forms a closed soft rubber cavity. The installed injection system injects rubber into the soft rubber cavity. After the soft rubber is formed, pressure is maintained, cooling is performed, and ejection is carried out. Thus, the injection process of a double-color product is completed. As can be seen, the double-color injection molding die for a car air duct of the present application can complete the processing of double-color injection molding parts on a single-color injection molding machine and only requires one set of molds, effectively reducing production costs and production cycles. Since only one set of molds is required to complete the processing of double-color injection molding parts, the mold design is effectively simplified.

[0019] Figure 6 is a three-dimensional view of the double-color injection molding die of the present application. Figure 3, as one of the preferred technical solutions, the blade insert, comprising, blade slider base 3-1, blade insert 3-2, oil cylinder 3-3 and travel switch 3-4; the oil cylinder and travel switch are installed at the bottom of the blade slider base; the blade insert is installed on the surface of the blade slider base. With the blade slider base as the basis, the oil cylinder and travel switch are installed at the bottom of the blade slider base, and the blade insert is installed on the surface of the blade slider base, so that the blade of the blade insert and the power and positioning mechanism form a whole. Not only can the modular design and installation be realized, but also the driving oil cylinder and travel switch of the blade insert can be built-in in the large slider, so that the whole mold structure is more compact.

[0020] Referring to the accompanying drawings Figure 4 , as one of the preferred technical solutions, the blade insert is a combined structure composed of five blades; and the upper end face of the connection between the blades is a plane. Designing the blade insert as a combined structure can effectively prevent the overall deformation of the blade insert, and can also reduce the processing difficulty of the blades. In addition, the boundary of the divided blades is selected as a plane as much as possible, which is conducive to the matching and installation of the blades.

[0021] Referring to the accompanying drawings Figure 5 , as one of the preferred technical solutions, the blade slider base and the adjacent parts are provided with a plurality of equal-height wear-resistant blocks 4 on the matching surface, and the blades and the adjacent parts are uniformly provided with a plurality of equal-height wear-resistant blocks 4 on the matching surface, the equal-height wear-resistant blocks are rectangular metal blocks formed by grinding, the material is DIN1.2767 / 45NiCrMo16 / X45NiCrMo4, the heat treatment hardness is 285HB, and the thickness is 8-10mm. The equal-height wear-resistant blocks can conveniently and accurately control the matching gap between the blade slider base and the adjacent parts, or the blades and the adjacent parts. For example, by adjusting the thickness of the equal-height wear-resistant blocks 4-1 and 4-2 in Figure 5 , the gap between the blade slider base and the hard and soft rubber sliders can be conveniently adjusted to ensure that the gap is less than 0.02mm, which ensures that the injection molding will not produce flash, and at the same time ensures that the blade slider base runs smoothly between the hard and soft rubber sliders. In addition, when the equal-height wear-resistant blocks are worn and the gap is too large, only the equal-height wear-resistant blocks need to be replaced, without replacing other parts, which not only saves the mold repair cost, but also reduces the mold repair cycle. For example, by adjusting the thickness of the equal-height wear-resistant blocks 4-3 in Figure 5 , the gap between the blades and the hard and soft rubber sliders can be conveniently adjusted. For example, by adjusting the thickness of the equal-height wear-resistant blocks 4-3 in Figure 5The thickness of the medium high wear-resistant block 4-4 can conveniently adjust the longitudinal gap between the blade sliding block base and the soft rubber sliding block, that is, adjust the distance of the blade insert moving inward, so that the gap between the blade insert and the front mold insert can be kept within 0.02mm, and the hard rubber cavity is well closed. In mold repairing and mold adjusting, only the height of the wear-resistant block needs to be adjusted, without replacing other parts of the sliding block, thereby saving the mold repairing cost and the mold repairing period.

[0022] Obviously, the car air duct double-color injection molding mold has the beneficial technical effects that the double-color injection molding parts can be processed on a single-color injection molding machine, and only one set of mold is needed; the production cost and the production period are effectively reduced, and the mold design is simplified.

Claims

1. A two-color injection molding mold for a car air duct, characterized in that: A product cavity is formed by a slider assembly, a cavity insert and a core insert; the slider assembly includes a hard rubber slider, a soft rubber slider and a blade insert; the hard rubber slider and the adjacent cavity insert and core insert form a hard rubber cavity; the soft rubber slider and the adjacent cavity insert and core insert form a soft rubber cavity; the blade insert is arranged at the junction of the hard rubber cavity and the soft rubber cavity, and is arranged on one side of the soft rubber cavity; in addition, an injection system is installed next to the single-color injection molding machine; the hard rubber cavity is connected to the injection pipeline of the original injection system of the single-color injection molding machine, and the soft rubber cavity is connected to the injection pipeline of the added injection system.

2. The two-color injection molding die for a car air duct according to claim 1, characterized in that: The blade insert comprises a blade slider base, a blade insert, an oil cylinder and a travel switch; the oil cylinder and the travel switch are installed at the bottom of the blade slider base; The blade insert is mounted on the surface of the blade slider base.

3. The two-color injection molding die for a car air duct according to claim 2, characterized in that: The blade insert is a combined structure, composed of five blades; and the upper end surfaces of the connections between the blades are all flat.

4. The two-color injection molding die for a car air duct according to claim 2 or 3, characterized in that: Several contour wear-resistant blocks are provided on the mating surface of the blade slider base and adjacent parts. The contour wear-resistant blocks are rectangular metal blocks formed by grinding. The material is DIN1.2767 / 45NiCrMo16 / X45NiCrMo4, the heat treatment hardness is 285HB, and the thickness is 8-10mm.

5. The two-color injection molding die for a car air duct according to claim 3, characterized in that: A number of contour wear-resistant blocks are evenly arranged on the mating surface of the blade and adjacent parts. The contour wear-resistant blocks are rectangular metal blocks formed by grinding. The material is DIN1.2767 / 45NiCrMo16 / X45NiCrMo4, the heat treatment hardness is 285HB, and the thickness is 8-10mm.

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