A thin mold device for preparing automobile pipe fittings and its use method

Abstract

The present invention discloses a lightweight mold device for preparing automobile pipe fittings, comprising: a front mold, a rear mold cooperating with the front mold, and a molding cavity; the front mold and the rear mold are slidably connected, and the rear mold is provided with a plurality of elastic units; an elastic member for mounting a first insert is provided at the bottom of the molding cavity, and the elastic member telescopes along the thickness direction of the rear mold; a plurality of accommodating cavities for embedding and mounting corresponding second inserts are provided between the front mold and the rear mold, and the plurality of accommodating cavities are all connected to the molding cavity; the first insert and the second insert are connected by a rubber-coated preform; the rubber-coated preform is located inside the molding cavity. The lightweight mold device uses elastic units to replace traditional ejector plates, occupies less space, and makes the mold thinner as a whole; the first insert, the rubber-coated preform, and the second insert are used to form a support for the automobile pipe fitting, and then injection molding is used to form a thin-walled multi-elbow pipe; gas is blown into one end of the second insert, so that the pipe fitting is delayed by the gas pressure and falls off the first insert, thereby achieving demolding.

Description

Technical Field

[0001] The present invention relates to the technical field of light and thin molds, and in particular to a light and thin mold device for preparing automobile pipe fittings and a use method thereof. Background Art

[0002] Automotive pipe fittings are a type of automotive spare parts. They are a general term for parts in the automotive piping system that play roles such as connection, control, direction change, diversion, sealing, and support. When producing automotive pipe fittings, molds are often used to perform one-time injection molding of the pipe fittings.

[0003] When injection molding automotive pipe fittings, it's difficult to release the mold after bonding. Existing techniques use ejector plates to lift the product for demolding. However, these plates are complex and take up a lot of space, increasing mold manufacturing costs and making the mold bulky.

[0004] Automotive pipe fittings are generally designed as thin-walled multi-elbow pipes. However, existing technologies cannot simultaneously form pipe fittings with different bend radii when forming thin-walled multi-elbow pipes. In addition, multi-elbow automotive pipe fittings cannot be ejected from the mold structure.

[0005] Therefore, it is necessary to improve the production mold of automobile pipe fittings in the prior art to solve the above problems. Summary of the Invention

[0006] The present invention overcomes the deficiencies of the prior art and provides a light and thin mold device for preparing automobile pipe fittings and a method for using the same.

[0007] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a light and thin mold device for the production of automobile pipe fittings, characterized by comprising: a front mold, a rear mold matched with the front mold, and a molding cavity formed by the front mold and the rear mold being pressed and closed;

[0008] The front mold is slidably connected to the rear mold, and the rear mold is provided with a plurality of elastic units for lifting the pipe in the molding cavity;

[0009] An elastic member for mounting a first insert is provided at the bottom of the molding cavity, and the elastic member is capable of telescopic movement along the thickness direction of the rear mold;

[0010] A plurality of accommodating cavities for embedding and installing corresponding second inserts are provided between the front mold and the rear mold, and the plurality of accommodating cavities are all communicated with the molding cavity; the first insert and the second insert are connected by a rubber-coated preform; the rubber-coated preform is located inside the molding cavity.

[0011] In a preferred embodiment of the present invention, the second insert is a hollow structure, and the second insert is in the shape of a straight tube or a threaded tube.

[0012] In a preferred embodiment of the present invention, the second insert is provided with a through hole for blowing gas into the molding cavity, and the through hole is arranged along the axis direction of the second insert.

[0013] In a preferred embodiment of the present invention, the first insert is a cylindrical solid structure.

[0014] In a preferred embodiment of the present invention, the front mold is provided with an injection port for introducing molten injection material into the molding cavity.

[0015] In a preferred embodiment of the present invention, the elastic unit is a nitrogen spring.

[0016] In a preferred embodiment of the present invention, the first insert and the second insert are arranged vertically or form a certain angle.

[0017] In a preferred embodiment of the present invention, the diameter of the first insert and the inner diameter of the second insert are equal or unequal.

[0018] In a preferred embodiment of the present invention, the plurality of second inserts are symmetrically arranged, and have equal or unequal inner diameters.

[0019] The present invention provides a method for using a thin mold device for preparing automobile pipe fittings, comprising the following steps:

[0020] S1, the front mold and the rear mold are opened, the elastic member on the rear mold is extended, and the rubber-coated preform is placed on the first insert of the elastic member;

[0021] S2, the first insert is returned to the rear mold through the elastic member, and the rubber-coated preform is located inside the molding cavity;

[0022] S3, placing the second insert in the accommodating cavity, so that the first insert, the rubber-coated preform, and the second insert are connected to each other;

[0023] S4, the front mold and the rear mold are closed, and the injection molding is cooled;

[0024] S5. The front mold and the rear mold are opened, and gas is blown into one end of the second insert, so that the pipe is pushed off the first insert by the gas pressure.

[0025] In a preferred embodiment of the present invention, in S5, the front mold and the rear mold are opened by 20 to 30 mm, and the elastic unit and the elastic member in the rear mold simultaneously lift up the mold in the molding cavity.

[0026] The present invention solves the defects existing in the background technology and has the following beneficial effects:

[0027] (1) The present invention provides a thin mold device for the preparation of automobile pipe fittings. The thin mold device uses an elastic unit to replace the traditional ejector plate, which occupies a small space, is lighter in weight, and has a simpler structure, making the mold as a whole thinner, increasing the selection range of injection molding machines and reducing mold costs; it provides greater pressure in a smaller space, can adjust the pressure, and has a larger stroke, making demoulding easy and stable, saving 3 to 4 seconds in the molding cycle.

[0028] (2) The present invention utilizes a first insert, a rubber-coated preform, and a second insert to construct a support for an automobile pipe fitting, and then injection molds a thin-walled multi-elbow pipe; gas is blown into one end of the second insert, so that the pipe fitting falls off the first insert by the air pressure, thereby achieving demoulding.

[0029] (3) In the present invention, the first insert and the second insert are respectively connected to the multiple output ports of the rubber-coated preform to form the core shaft of the automobile pipe fitting, so that the rubber-coated preform is fixedly supported, and the inner wall of the automobile pipe fitting forms a regular concave surface, which is not only conducive to demoulding, but also can reduce the flatness or cracking of the pipe fitting and improve the strength of the automobile pipe fitting.

[0030] (4) The present invention improves the rapid prototyping technology of mold molding, achieves a unified standard for general purposes, controls the production of non-standard parts for each mold, improves the mold production cycle, and reduces mold costs. The present invention shortens the mold production cycle by 60%, reduces mold costs by 50%, and meets 40% of the mold opening needs of automotive pipe products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments described in the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0032] Figure 1 This is a schematic structural diagram of a thin mold device for manufacturing automobile pipe fittings according to the first embodiment of the present invention;

[0033] Figure 2 1 is a schematic diagram of the three-dimensional structure of the rear mold of the first embodiment of the present invention;

[0034] Figure 3 1 is a schematic structural diagram of a first insert, a rubber-coated preform, and a second insert according to a first embodiment of the present invention;

[0035] Figure 4 This is a schematic structural diagram of a molding cavity with a different structure according to the second embodiment of the present invention;

[0036] Figure 5is a structural schematic diagram of another molding cavity with a different structure according to the second embodiment of the present invention;

[0037] In the figure: 1. Thin mold equipment; 2. Front mold; 3. Back mold; 4. Positioning column; 5. Molding cavity; 6. Elastic part; 7. First insert; 8. Second insert; 9. Rubber-coated preform. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] Example 1

[0043] like Figure 1 , which is a structural schematic diagram of a thin mold device 1 for preparing automobile pipe fittings in this embodiment.

[0044] The light and thin mold device 1 comprises: a front mold 2, a rear mold 3 matched with the front mold 2, and a molding cavity 5 formed by the front mold 2 and the rear mold 3 being pressed and closed.

[0045] The front mold 2 is slidably connected to the rear mold 3, and the front mold 2 and the rear mold 3 are positioned by positioning pillars 4. The front mold 2 is provided with an injection port for introducing molten injection material into the molding cavity 5.

[0046] In this embodiment, the rear mold 3 is provided with a plurality of elastic units connected to the molding cavity 5 and used to lift the pipe in the molding cavity 5. The elastic units are nitrogen springs. The nitrogen springs are installed in the position that replaces the traditional ejector plate.

[0047] It should be noted that, in this embodiment, several nitrogen springs are installed on the mounting plate in the rear mold 3. Several nitrogen springs are arranged at intervals according to the shape of the molding cavity 5. Adjacent nitrogen springs are connected by pipes and joints. A control meter is provided at the other end of the rear mold 3 for controlling the elastic force and smoothness of the nitrogen springs.

[0048] The thin mold device 1 uses an elastic unit to replace the traditional ejector plate, which takes up less space, is lighter in weight, and has a simpler structure, making the mold as a whole thinner and lighter, increasing the selection range of the injection molding machine and reducing the mold cost; the nitrogen spring of the utility model has superior elastic strength and smoothness, provides greater pressure in a smaller space, can adjust the pressure, and has a larger stroke, making demolding easy and stable, saving 3 to 4 seconds in the molding cycle.

[0049] like Figure 2 FIG2 is a schematic diagram showing the three-dimensional structure of the rear mold 3 in this embodiment. The bottom of the molding cavity 5 in the rear mold 3 in this embodiment is provided with an elastic member 6 for mounting a first insert 7, and the elastic member 6 moves in a telescopic manner along the thickness direction of the rear mold 3.

[0050] A plurality of accommodating cavities for embedding and installing corresponding second inserts 8 are provided between the front mold 2 and the rear mold 3 , and the plurality of accommodating cavities are all communicated with the molding cavity 5 .

[0051] The first insert 7 and the second insert 8 are connected by a rubber-coated preform 9, which is located inside the molding cavity 5. In this embodiment, the rubber-coated preform 9 has the same shape as the molding cavity 5, but its diameter is smaller than the groove of the molding cavity 5. This creates an actual injection cavity between the rubber-coated preform 9 and the inner wall of the molding cavity 5, which is used to inject a layer of plastic material onto the surface of the rubber-coated preform 9.

[0052] The surface of the rubber-coated preform 9 in this embodiment is provided with a pattern, which is convex or concave, so that the injection molding material is tightly combined with the surface of the rubber-coated preform 9 during the injection molding process.

[0053] like Figure 3 As shown, a schematic diagram of the structure of the first insert 7, the rubber-coated preform 9 and the second insert 8 in this embodiment is shown. The inner wall of the rubber-coated preform 9 in this embodiment is a smooth channel. The two ends of the channel are connected to the first insert 7 and the second insert 8 respectively. In this embodiment, the first insert 7 is a cylindrical solid structure with a smooth surface. The second insert 8 is a hollow structure, and the second insert 8 is a straight tube or a threaded tube. In this embodiment, the second insert 8 is preferably a threaded tube. The second insert 8 is provided with a through hole for blowing gas into the molding cavity 5, and the through hole is arranged along its own axis.

[0054] In this embodiment, a first insert 7, a rubber-coated preform 9, and a second insert 8 are used to support the automotive pipe fitting, thereby forming a thin-walled, multi-elbow pipe by injection molding. The first insert 7 is plugged into one end of the rubber-coated preform 9, and the first insert 7 is embedded in the rubber-coated preform 9. The second insert 8 is threadedly connected to one end of the rubber-coated preform 9.

[0055] When gas is blown into the second insert 8 from one side, it passes through the inner cavity of the rubber-coated preform 9, increasing the air pressure in the inner cavity of the rubber-coated preform 9. This causes the injection molding material and the rubber-coated preform 9 to gradually separate from the first insert 7, thereby achieving demolding. After the second insert 8 and the rubber-coated preform 9 are separated from the first insert 7, the second insert 8 and the rubber-coated preform 9 are separated by rotating the second insert 8.

[0056] In this embodiment, the support of the automobile pipe fitting is divided into several parts. The first insert 7 and the second insert 8 are respectively connected to the multiple output ports of the rubber-coated preform 9 to form the core shaft of the automobile pipe fitting, so that the rubber-coated preform 9 is fixedly supported, and the inner wall of the automobile pipe fitting is formed with a regular concave surface, which is not only conducive to demoulding, but also can reduce the flattening or cracking of the pipe fitting, thereby improving the strength of the automobile pipe fitting.

[0057] This embodiment provides a method for using a thin mold device 1 for preparing automobile pipe fittings, comprising the following steps:

[0058] S1, the front mold 2 and the back mold 3 are opened, the elastic member 6 on the back mold 3 is extended, and the rubber-coated preform 9 is placed on the first insert 7 of the elastic member 6;

[0059] S2, the first insert 7 is retracted into the rear mold 3 through the elastic member 6, and the rubber-coated preform 9 is located inside the molding cavity 5;

[0060] S3, placing the second insert 8 in the accommodating cavity, so that the first insert 7, the rubber-coated preform 9 and the second insert 8 are connected to each other;

[0061] S4, the front mold 2 and the rear mold 3 are closed, and the injection molding is cooled;

[0062] S5, the front mold 2 and the rear mold 3 are opened 20 to 30 mm, the elastic unit and the elastic part 6 in the rear mold 3 simultaneously lift the mold in the molding cavity 5, and blow gas into one end of the second insert 8, so that the pipe fitting is delayed and falls off the first insert 7 by air pressure.

[0063] Example 2

[0064] Based on the first embodiment, this embodiment improves the structure of the molding cavity 5 and the corresponding structures of the first insert 7, the rubber-coated preform 9 and the second insert 8 to prepare thin-walled multi-elbow tubes of different shapes.

[0065] like Figure 4 and Figure 5 Schematic diagrams of the structures of the molding cavities 5 with different structures are shown. Figure 4 and Figure 5 Both show automotive pipe fittings with three output ports.

[0066] When this embodiment uses Figure 4 In the rear mold 3 shown, the first insert 7 and the second insert 8 are perpendicular to each other. There is preferably one first insert 7 and two second inserts 8, which are symmetrically arranged and have equal diameters. Here, the diameter of the first insert 7 and the inner diameter of the second insert 8 may be equal or unequal.

[0067] When this embodiment uses Figure 5 In the rear mold 3 shown, the first insert 7 and the second insert 8 are perpendicular to each other. There is preferably one first insert 7 and two second inserts 8, which are symmetrically arranged and have unequal diameters.

[0068] In addition, this embodiment can also be designed so that the first insert 7 and the second insert 8 form a certain angle.

[0069] This embodiment improves the rapid prototyping technology for mold molding, achieving universal standards, controlling the production of non-standard parts for each mold, improving mold production cycle time, and reducing mold costs. This embodiment shortens mold production cycle time by 60%, reduces mold costs by 50%, and meets 40% of the mold opening needs for automotive pipe fittings.

[0070] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A thin mold device for the preparation of automobile pipe fittings, characterized in that: include: A front mold, a rear mold matched with the front mold, and a molding cavity formed by pressing and closing the front mold and the rear mold; The front mold is slidably connected to the rear mold, and the rear mold is provided with a plurality of elastic units for lifting the pipe in the molding cavity; An elastic member for mounting a first insert is provided at the bottom of the molding cavity, and the elastic member is capable of telescopic movement along the thickness direction of the rear mold; A plurality of accommodating cavities for embedding and installing corresponding second inserts are provided between the front mold and the rear mold, and the plurality of accommodating cavities are all communicated with the molding cavity; the first insert and the second insert are connected by a rubber-coated preform; the rubber-coated preform is located inside the molding cavity; The second insert is provided with a through hole for blowing gas into the molding cavity, and the through hole is arranged along its own axis; the elastic unit is a nitrogen spring; The method of using the thin mold device comprises the following steps: S1, the front mold and the rear mold are opened, the elastic member on the rear mold is extended, and the rubber-coated preform is placed on the first insert of the elastic member; S2, the first insert is returned to the rear mold through the elastic member, and the rubber-coated preform is located inside the molding cavity; S3, placing the second insert in the accommodating cavity, so that the first insert, the rubber-coated preform, and the second insert are connected to each other; S4, the front mold and the rear mold are closed, and the injection molding is cooled; S5. The front mold and the rear mold are opened, and gas is blown into one end of the second insert, so that the pipe is pushed off the first insert by the gas pressure.

2. A thin mold device for manufacturing automobile pipe fittings according to claim 1, characterized in that: The second insert is a hollow structure, and the second insert is in the shape of a straight tube or a threaded tube.

3. The thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: The front mold is provided with an injection port for introducing molten injection material into the molding cavity.

4. The thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: The first insert and the second insert are arranged vertically or form a certain angle.

5. The thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: The diameter of the first insert and the inner diameter of the second insert are equal or unequal.

6. The thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: The first insert is a cylindrical solid structure.

7. The thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: In the step S5 , the front mold and the rear mold are opened by 20 to 30 mm, and the elastic unit and the elastic member in the rear mold simultaneously lift up the mold in the molding cavity.

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