CN116039000A - A light and thin mold equipment for the preparation of automobile pipe fittings and its application method - Google Patents

Abstract

The invention discloses a light and thin die equipment for preparing automobile pipe fittings, which comprises the following components: a front mold, a rear mold matched with the front mold, and a forming cavity; the front die is in sliding connection with the rear die, and a plurality of elastic units are arranged on the rear die; an elastic piece for mounting the first insert is arranged at the bottom of the forming cavity and moves in a telescopic manner along the thickness direction of the rear mold; a plurality of accommodating cavities for embedding and installing the corresponding second inserts are arranged between the front die and the rear die, and are communicated with the forming cavities; the first insert and the second insert are connected through an encapsulation prefabricated member; the encapsulated preform is located within the molding cavity. The light and thin die equipment adopts the elastic unit to replace the traditional ejector plate, so that the occupied space is small, and the whole die is lighter and thinner; constructing a support of the automobile pipe fitting by using the first insert, the rubber coating prefabricated member and the second insert, and then forming a thin-wall multi-elbow pipe by injection molding; one end of the second insert is blown with air, so that the pipe fitting is smoothly separated from the first insert through air pressure, and demolding is realized.

Description

A light and thin mold equipment for the preparation of automobile pipe fittings and its application method

technical field

The invention relates to the technical field of light and thin molds, in particular to a light and thin mold equipment used for preparing automobile pipe fittings and a method for using the same.

Background technique

Automobile pipe fittings are a kind of auto parts. It is a general term for parts that play the roles of connection, control, direction change, diversion, sealing, support, etc. in the automobile piping system. During the production of automobile pipe fittings, molds are often used for one-time injection molding of pipe fittings. forming.

In the injection molding of automotive pipe fittings, it is difficult to release the mold after the pipe is bonded. In the prior art, the ejector plate is used to lift the product for demoulding, but the structural design of the ejector plate is relatively complicated and takes up a large space, which increases the manufacturing cost of the mold and makes the overall mold heavy.

Automobile pipe fittings are generally designed as thin-walled multi-elbow pipes, but in the prior art, when thin-walled multi-elbow pipes are formed, pipe fittings with different sizes of elbow radii cannot be formed at the same time; in addition, multi-bend automobile pipe fittings Unable to achieve mold structure ejection.

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

Contents of the invention

The invention overcomes the deficiencies of the prior art, and provides a light and thin mold equipment used for the manufacture of automobile pipe fittings and a use method thereof.

In order to achieve the above object, the technical solution adopted by the present invention is: a kind of light and thin mold equipment used for the preparation of automobile pipe fittings, which is characterized in that it includes: a front mold, a back mold matched with the front mold, and a mold made of the front mold The molding cavity formed by pressing and closing with the rear mold;

The front mold is slidingly connected to the rear mold, and the rear mold is provided with several elastic units for jacking up the pipe fittings in the molding cavity;

The bottom of the molding cavity is provided with an elastic piece for installing the first insert, and the elastic piece moves telescopically along the thickness direction of the rear mold;

A number of accommodating cavities for inserting and installing corresponding second inserts are arranged between the front mold and the back mold, and several accommodating cavities communicate with the molding cavity; the first insert and the second insert The two inserts are connected through a rubberized preform; the rubberized preform is located inside the molding cavity.

In a preferred embodiment of the present invention, the second insert is a hollow structure, and the second insert is straight or threaded.

In a preferred embodiment of the present invention, the second insert is provided with through holes for blowing gas into the molding cavity, and the through holes are arranged along the direction of its own axis.

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

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

In a preferred embodiment of the present invention, the elastic unit is a nitrogen gas spring.

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

In a preferred embodiment of the present invention, the diameter of the first insert is equal to or unequal to the inner diameter of the second insert.

In a preferred embodiment of the present invention, several second inserts are arranged symmetrically, and the inner diameters are equal or unequal.

The invention provides a method for using a light and thin mold equipment for the preparation of automobile pipe fittings, comprising the following steps:

S1. The front mold and the back mold are opened, the elastic part on the back mold is stretched out, and the rubberized prefabricated part is placed on the first insert of the elastic part;

S2. The first insert is returned to the rear mold through the elastic member, and the rubberized preform is located inside the molding cavity;

S3, placing the second insert in the accommodation cavity, so that the first insert, the rubber prefabricated part 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 detached from the first insert by the air pressure.

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

The present invention solves the defect existing in the background technology, and the present invention has the following beneficial effects:

(1) The present invention provides a light and thin mold equipment for the production of automobile pipe fittings. The light and thin mold equipment uses elastic units to replace the traditional ejector plate, which occupies a small space, is lighter in weight, and has a simpler structure, making the overall mold thinner and thinner. The selection range of the injection molding machine is widened, and the cost of the mold is reduced; greater pressure can be provided in a smaller space, the pressure can be adjusted, and the stroke is larger, which makes demoulding easy and stable, and saves the molding cycle by 3 to 4 seconds.

(2) The present invention utilizes the first insert, the rubber prefabricated part and the second insert to construct the support of the automobile pipe, and then injection molding forms a thin-walled multi-elbow pipe; blowing gas through one end of the second insert, so that the pipe passes through The air pressure delays the falling off of the first insert to realize demoulding.

(3) In the present invention, the first insert and the second insert are respectively connected to a plurality of output ports of the rubberized preform to form the mandrel of the automobile pipe, so that the rubber preform is fixedly supported, and then the inner wall of the automobile pipe Forming a regular concave surface is not only conducive to demoulding, but also can reduce the phenomenon of flattening or cracking of pipe fittings and improve the strength of automobile pipe fittings.

(4) The rapid sampling technology improvement of the mold forming of the present invention achieves a unified standard for general purposes, controls the production of non-standard parts of each mold, improves the mold production cycle, and reduces the mold cost. The mold manufacturing cycle of the invention is shortened by 60%, the mold cost is reduced by 50%, and 40% of mold opening requirements of automobile pipe fitting products are realized.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments recorded in the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work;

Fig. 1 is the structural representation of a kind of light and thin mold equipment for the preparation of automobile pipe fittings of embodiment one of the present invention;

Fig. 2 is the schematic diagram of the three-dimensional structure of the rear mold of Embodiment 1 of the present invention;

Fig. 3 is a schematic structural view of the first insert, the rubberized prefabricated part and the second insert in Embodiment 1 of the present invention;

Fig. 4 is a structural schematic diagram of a molding cavity with a different structure according to Embodiment 2 of the present invention;

Fig. 5 is a structural schematic diagram of another molding cavity with a different structure according to Embodiment 2 of the present invention;

In the figure: 1. Light and 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. Lagging preforms.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and Simplified descriptions 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, and thus should not be construed as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application based on specific situations.

Embodiment one

As shown in FIG. 1 , it shows a schematic structural view of a light and thin mold equipment 1 for manufacturing automobile pipe fittings in this embodiment.

The light and thin mold equipment 1 includes: a front mold 2 , a rear mold 3 matched with the front mold 2 , and a molding cavity 5 formed by pressing and closing the front mold 2 and the rear mold 3 .

The front mold 2 and the back mold 3 are slidingly connected, and the front mold 2 and the back mold 3 are positioned by positioning columns 4 . An injection port is provided on the front mold 2 for feeding molten injection molding material into the molding cavity 5 .

In this embodiment, the rear mold 3 is provided with several elastic units 6 , which are connected with the forming cavity 5 and are used for jacking up the pipe fittings in the forming cavity 5 . The elastic unit 6 is a nitrogen gas spring. The nitrogen gas spring is installed in place of the conventional ejector plate.

It should be noted that in this embodiment, several nitrogen gas springs are installed on the mounting plate in the rear mold 3, and several nitrogen gas springs are arranged at intervals according to the shape of the molding cavity 5, and adjacent nitrogen gas springs are connected by pipelines and joints, located at The other end of the back mold 3 is provided with a control meter, which is used to control the elasticity and smoothness of the nitrogen gas spring.

The light and thin mold equipment 1 adopts the elastic unit 6 to replace the traditional ejector plate, which occupies less space, is lighter in weight, and has a simpler structure, making the overall mold lighter and thinner, increasing the selection range of the injection molding machine, and reducing the cost of the mold; the nitrogen spring of the present invention Superior elastic strength and smoothness, provide greater pressure in a small space, can adjust the pressure, and the stroke is large, making demoulding easy and stable, saving the molding cycle by 3-4s.

As shown in FIG. 2 , it shows a schematic perspective view of the three-dimensional structure of the rear mold 3 in this embodiment. The bottom of the molding cavity 5 in the rear mold 3 of this embodiment is provided with an elastic member 6 for installing the first insert 7 , and the elastic member 6 moves telescopically along the thickness direction of the rear mold 3 .

Between the front mold 2 and the rear mold 3 are provided several accommodating cavities for embedded installation of the corresponding second insert 8 , and the several accommodating cavities communicate with the molding cavity 5 .

Wherein, the first insert 7 and the second insert 8 are connected by a rubberized preform 9 ; the rubberized preform 9 is located inside the molding cavity 5 . The shape of the rubberized preform 9 in this embodiment is the same as that of the molding cavity 5, but the diameter of the rubberized preform 9 is smaller than the groove size of the molding cavity 5, so that the gap between the rubberized preform 9 and the inner wall of the molding cavity 5 An actual injection molding cavity is formed between them, which is used to inject and wrap a layer of plastic material on the surface of the rubberized preform 9 .

The surface of the rubberized preform 9 in this embodiment is provided with a pattern, and the pattern is convex or concave, so that the injection molding material is closely combined with the surface of the rubberized preform 9 during the injection molding process.

As shown in FIG. 3 , it shows a schematic structural view of the first insert 7 , the rubberized preform 9 and the second insert 8 in this embodiment. The inner wall of the rubberized preform 9 in this embodiment is a smooth channel. Both ends of the channel are respectively connected with the first insert 7 and the second insert 8 . 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 straight or threaded. In this embodiment, the second insert 8 is preferably threaded. The second insert 8 is provided with through holes for blowing gas into the molding cavity 5, and the through holes are arranged along the direction of its own axis.

In this embodiment, the first insert 7 , the rubberized prefabricated part 9 and the second insert 8 are used to construct the support of the automobile pipe fittings, and then the thin-wall multi-elbow pipe is formed by injection molding. Wherein, one end of the first insert 7 is inserted into the rubberized preform 9 , and the first insert 7 is inserted into the interior of the rubberized preform 9 . One end of the second insert 8 and the rubberized prefabricated part 9 is screwed together.

After blowing gas from one side of the second insert 8, the gas passes through the inner cavity of the rubber preform 9, so that the air pressure in the inner cavity of the rubber preform 9 increases, so that the injection molding material and the rubber preform 9 gradually It is separated from the first insert 7 to realize demoulding. After the second insert 8 and the rubber-coated preform 9 are separated from the first insert 7 , the second insert 8 is separated from the rubber-coated preform 9 by rotating the second insert 8 .

In this embodiment, the support of the automobile pipe fittings is divided into several parts, and the first insert 7 and the second insert 8 are respectively connected with multiple output ports of the rubberized prefabricated part 9 to form the mandrel of the automobile pipe fitting, so that the rubberized prefabricated part 9 It is fixed and supported, so that the inner wall of the automobile pipe fittings forms a regular concave surface, which is not only conducive to demoulding, but also can reduce the flatness or cracking of the pipe fittings, and improve the strength of the automobile pipe fittings.

This embodiment provides a method for using the light and thin mold equipment 1 for the preparation of automobile pipe fittings, including the following steps:

S1, the front mold 2 and the rear mold 3 are opened, the elastic member 6 on the rear mold 3 protrudes, and the rubberized preform 9 is placed on the first insert 7 of the elastic member 6;

S2. The first insert 7 is returned to the rear mold 3 through the elastic member 6, and the rubberized preform 9 is located inside the molding cavity 5;

S3, placing the second insert 8 in the accommodating cavity, so that the first insert 7, the rubber prefabricated part 9 and the second insert 8 are connected to each other;

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

S5. The front mold 2 and the rear mold 3 are opened by 20-30 mm, the elastic unit 6 and the elastic member 6 in the rear mold 3 simultaneously lift up the mold in the molding cavity 5, and blow gas into one end of the second insert 8, so that The pipe fittings fall off the first insert 7 by air pressure.

Embodiment two

In this embodiment, on the basis of the first embodiment, the structure of the molding cavity 5 and the corresponding structures of the first insert 7, the rubberized preform 9 and the second insert 8 are improved, so as to prepare and form thin walls of different shapes Multiple elbows.

FIG. 4 and FIG. 5 show structural schematic diagrams of molding cavities 5 with different structures. Figures 4 and 5 both show an automotive tubing with three outlets.

When the present embodiment uses the rear mold 3 as shown in Figure 4, the first insert 7 and the second insert 8 are perpendicular to each other, the first insert 7 is preferably one, and the second insert 8 is preferably two, Symmetrical setup and equal diameter dimensions. Here, the diameter size of the first insert 7 and the inner diameter of the second insert 8 are equal or unequal.

When the present embodiment uses the rear mold 3 as shown in Figure 5, the first insert 7 and the second insert 8 are perpendicular to each other, the first insert 7 is preferably one, and the second insert 8 is preferably two, Symmetrical setup and unequal diameter dimensions.

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

In this embodiment, the rapid sampling technology for mold forming is improved to achieve a unified standard for general purposes, control the production of non-standard parts for each mold, improve the mold production cycle, and reduce mold costs. In this embodiment, the mold manufacturing cycle is shortened by 60%, the mold cost is reduced by 50%, and 40% of the mold opening requirements of automobile pipe fittings are realized.

The above is inspired by the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A light and thin mold equipment for the preparation of automobile pipe fittings, characterized in that it includes: a front mold, a back mold cooperating with the front mold, and a molding formed by pressing and closing the front mold and the back mold Cavity; The front mold is slidingly connected to the rear mold, and the rear mold is provided with several elastic units for jacking up the pipe fittings in the molding cavity; The bottom of the molding cavity is provided with an elastic piece for installing the first insert, and the elastic piece moves telescopically along the thickness direction of the rear mold; A number of accommodating cavities for inserting and installing corresponding second inserts are arranged between the front mold and the back mold, and several accommodating cavities communicate with the molding cavity; the first insert and the second insert The two inserts are connected through a rubberized preform; the rubberized preform is located inside the molding cavity. 2. A light and thin mold equipment 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. A light and thin mold equipment for the production of automobile pipe fittings according to claim 1, characterized in that: the second insert is provided with a through hole for blowing gas into the molding cavity, and the through hole Arranged along its own axis. 4. A light and thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: the elastic unit is a nitrogen gas spring. 5. A light and thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: said front mold is provided with an injection port for feeding molten injection molding material into said molding cavity. 6. The light and 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. 7. A light and thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: the diameter of the first insert is equal to or unequal to the inner diameter of the second insert. 8. A light and thin mold equipment for manufacturing automobile pipe fittings according to claim 1, characterized in that: the first insert is a cylindrical solid structure. 9. A method for using the light and thin mold equipment for the preparation of automobile pipe fittings according to any one of claims 1-8, characterized in that it comprises the following steps: S1. The front mold and the back mold are opened, the elastic part on the back mold is stretched out, and the rubberized prefabricated part is placed on the first insert of the elastic part; S2. The first insert is returned to the rear mold through the elastic member, and the rubberized preform is located inside the molding cavity; S3, placing the second insert in the accommodation cavity, so that the first insert, the rubber prefabricated part 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 detached from the first insert by the air pressure. 10. A method for using a light and thin mold equipment for the production of automobile pipe fittings according to claim 9, characterized in that: in said S5, the front mold and the rear mold are opened by 20-30 mm, and the elastic unit in the rear mold Simultaneously with the elastic piece, the mold in the molding cavity is jacked up.

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