CN103448212B - Precision rotor injection mold - Google Patents

Abstract

The invention discloses a precision injection mold for a rotor, which relates to the technical field of moulds. The uniqueness of the gating system is that the material in the runner flows into the outer cavity to form a protective sleeve first, and the molten plastic in the protective sleeve enters the inner cavity of the mold in the form of a latent gate. The remarkable effect of the invention is: the liquid protective sleeve tightly wraps the circular magnet, which produces uniform pressure on the magnet, which not only protects the magnet, but also corrects the position of the magnet, and overcomes the shortcomings of easy cracking of the product and burrs on the surface. . The invention cleverly applies side gates, protective sleeves and latent gates to a set of moulds, makes products easy to manufacture and processes, and improves product molding rate and production efficiency.

Description

Rotor Precision Injection Mold

technical field

The invention relates to the technical field of molds, in particular to a rotor precision injection mold.

Background technique

In the prior art, the rotor injection mold is generally a single-parting mold, with side gate feeding, upper and lower demoulding methods, a cylindrical cavity, and a magnet as an insert into the cylindrical cavity. Because the magnet and the cylindrical cavity There is a gap of 0.05mm, and the side gate is used. The molten plastic will impact the magnet insert during pouring, which will easily cause product breakage, burrs on the product surface, and magnet collapse. At the same time, the molding rate is low, the precision is low, and it is not easy to manufacture. , affecting work efficiency.

Contents of the invention

In view of the above existing technical problems, the present invention provides a rotor precision injection mold.

The present invention is realized through the following technical proposals: a precision injection mold for a rotor, including an upper mold seat plate with a gate in the center; a cavity plate, a core plate, a support plate, and a mold foot are arranged in sequence next to the upper mold seat plate , Lower mold base plate; Described support plate is provided with the guide post that runs through upper mold base plate, cavity plate, core plate; Described upper die base plate is fixed with cavity plate; Described support plate, The mold foot and the lower mold base plate are fixed together; a baffle plate is placed on the lower mold base plate; a push plate is placed on the described baffle plate; a penetrating core plate and a The reset rod and ejector rod of the support plate; the core plate is evenly provided with a rotor cavity around the center, and the cavity is divided into an outer cavity and an inner cavity, and a lower mold insert is provided under each cavity; The supporting plate is provided with positioning pins corresponding to the position below the lower die insert; the cavity plate is provided with an upper die insert corresponding to the position above the cavity, and a main channel connecting the gate is also provided on it, and the cavity plate and The core plates are provided with a flow channel connecting the main flow channel and the cavity; the upper mold base plate is provided with a spring corresponding to the position above the upper mold insert, and a positioning rod is fixed under the spring; the baffle plate A pulling rod is arranged at the central position, and the upper end of the pulling rod is located below the main channel.

It further comprises: a sprue sleeve is provided on the sprue of the upper die seat plate.

The cavity plate is provided with a guide sleeve matched with the guide post.

The upper mold seat plate and the cavity plate are fixed by countersunk screws.

The support plate, die foot, and lower die seat plate are fixed by countersunk screws penetrating through the die foot.

When in use: the liquid injected into the outer cavity forms a protective sleeve tightly enclosing the circular magnet, which produces uniform pressure on the magnet, which not only protects the magnet, but also corrects the position of the magnet, which overcomes the product's easy breakage and burrs on the surface, etc. shortcoming.

The invention cleverly applies side gates and latent gates to a set of moulds, makes products easy to manufacture and process, and improves product molding rate and production efficiency.

Description of drawings

Fig. 1 is the assembly front view of mold structure of the present invention;

Fig. 2 is a schematic diagram of the structure of the medium cavity plate of the present invention.

In the figure: 1. Upper mold seat plate, 2. Cavity plate, 3. Core plate, 4. Support plate, 5. Die foot, 6. Push plate, 7. Baffle plate, 8. Lower mold seat plate, 9 , guide sleeve, 10, guide post, 11, sprue sleeve, 12, spring, 13, countersunk screw, 14, positioning rod, 15, upper mold insert, 16, magnet, 17, lower mold insert, 18, Rotating shaft, 19, positioning pin, 20, reset rod, 21, ejector rod, 22, material pulling rod.

Detailed ways

The following is a specific embodiment of the present invention, and the present invention will be further described in conjunction with the accompanying drawings.

As shown in the figure, a rotor precision injection mold includes an upper mold seat plate 1 with a gate in the center, and a sprue sleeve 11 is provided on the gate; a mold cavity is arranged in turn next to the upper mold seat plate 1 Plate 2, core plate 3, support plate 4, mold foot 5, lower mold seat plate 8; the support plate 4 is provided with a guide column that runs through the upper mold seat plate 1, cavity plate 2, and core plate 3 10; the cavity plate 2 is provided with a guide sleeve 9 cooperating with the guide post 10; the upper mold seat plate 1 and the cavity plate 2 are fixed by countersunk screws 13; the support plate 4, the mold The foot 5 and the lower mold seat plate 8 are fixed together by the countersunk head screw 13 passing through the mold foot 5; the said lower mold seat plate 8 is provided with a baffle plate 7; the said baffle plate 7 is provided with a push plate 6; The push plate 6 is provided with a reset rod 20 and a push rod 21 that penetrate through the core plate 3 and the support plate 4;

The core plate 3 is evenly provided with six rotor cavities around the center, and the cavities are divided into an outer cavity and an inner cavity, and each cavity is provided with a lower mold insert 17;

The support plate 4 is provided with a positioning pin 19 corresponding to the position below the lower mold insert 17;

The cavity plate 2 is provided with an upper mold insert 15 corresponding to the upper position of the cavity, and a main channel connecting the gate is also provided on it, and a connecting main channel and a cavity are provided between the cavity plate 2 and the core plate 3. The body's shunt channel;

The upper mold seat plate 1 is provided with a spring 12 corresponding to the position above the upper mold insert 15, and a positioning rod 14 is fixed under the spring 12;

The center position of the baffle plate 7 is provided with a pulling rod 22, and the upper end of the pulling rod 2 is located below the main channel.

When working, put 6 magnets in the 6 cavities of the core plate 3, put the 6 rotating shafts into the 6 magnets respectively, and then operate the vertical injection molding machine for mold closing and pouring, the molten plastic The material enters the mold through the nozzle of the injection molding machine, and the material in the main channel and the sub-runner flows into the outer cavity through the side gate to form a protective cover, and the molten plastic in the protective cover enters the inner cavity of the mold in the form of a latent gate. After maintaining the pressure and cooling, the mold is opened. When the mold is demoulded, the ejector mechanism pushes the gating system, protective sleeve and product out of the mold cavity. After that, the gating system and the protective sleeve are removed to obtain the product.

Claims (5)

1. a Precision rotor injection mold, is characterized in that: comprise the upper clamping plate (1) that center has cast gate; Near being provided with cavity plate (2), core plate (3), support plate (4), mould pin (5), counterdie seat board (8) under upper clamping plate (1) successively; Described support plate (4) is provided with the guide pillar (10) of through upper clamping plate (1), cavity plate (2), core plate (3); Described upper clamping plate (1) is fixed with cavity plate (2); Described support plate (4), mould pin (5), counterdie seat board (8) are integrally fixed; Described counterdie seat board (8) is placed with baffle plate (7); Described baffle plate (7) is placed with push pedal (6); Described push pedal (6) is provided with the release link (20) and push rod (21) that run through core plate (3) and support plate (4);

Described core plate (3) is evenly provided with rotor cavity around center, described cavity is divided into exocoel and inner chamber, when injection moulding, the plastics of melting flow into exocoel by side gate and first form protective sleeve, and in protective sleeve, the plastics of melting enter dies cavity with tunnel gate form again; Each cavity has counterdie mold insert (17);

Described support plate (4) corresponding counterdie mold insert (17) lower position is provided with pilot pin (19);

Described cavity plate (2) respective chamber top position is provided with patrix mold insert (15), it is also provided with the sprue being communicated with cast gate, is provided with the runner being communicated with sprue and cavity between cavity plate (2) and core plate (3);

Described upper clamping plate (1) corresponding patrix mold insert (15) top position is provided with spring (12), is fixed with backstay (14) under described spring (12);

Described baffle plate (7) center is provided with sprue puller (22), and described sprue puller (2) upper end is positioned at below sprue.

2. Precision rotor injection mold according to claim 1, is characterized in that: described upper clamping plate cast gate is provided with sprue bush (11).

3. Precision rotor injection mold according to claim 1, is characterized in that: described cavity plate (2) is provided with the guide pin bushing (9) coordinated with guide pillar (10).

4. Precision rotor injection mold according to claim 1, is characterized in that: fixed by sunk screw (13) between described upper clamping plate (1) and cavity plate (2).

5. Precision rotor injection mold according to claim 1, is characterized in that: described support plate (4), mould pin (5), counterdie seat board (8) are fixed by the sunk screw (13) running through mould pin (5).