CN215359655U - Hot runner injection mold for rubber framework oil seal - Google Patents

Abstract

The utility model discloses a hot runner injection mould for a rubber framework oil seal, which consists of an injection plate assembly, a runner plate assembly and a lower template, wherein the injection plate assembly and the runner plate assembly are connected together through a demoulding hoisting mechanism, and the runner plate assembly comprises a cavity part of the oil seal and a demoulding mechanism of the oil seal.

Description

Hot runner injection mold for rubber framework oil seal

Technical Field

The utility model belongs to the technical field of oil seal production equipment, and particularly relates to a hot runner injection mold for a rubber framework oil seal.

Background

At present, with the development of technology, the quality requirements of customers on products are higher and higher, and in order to ensure high quality and rate of certified products, rubber injection molds are gradually applied to mold structures in the sealing field. For the framework oil seal product with a complex structure in the sealing field, because the matching interfaces of the engine are different and the shape can have great difference, the problem that the existing simple injection machine is utilized to realize injection vulcanization of the product with different structures becomes a problem which needs to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a hot runner injection mold for a rubber framework oil seal, which uses a traditional injection machine, has a simple structure, does not need to add an auxiliary tool on equipment for demolding an oil seal product, and realizes the free separation of the mold and the automatic separation of the oil seal product.

The utility model is realized in such a way that the hot runner injection mold for the rubber framework oil seal is characterized in that the mold consists of an injection plate assembly, a runner plate assembly and a lower template, wherein:

the injection plate assembly comprises an injection plate, a main runner nozzle and a stripping rod, wherein the main runner nozzle is arranged in the center of the injection plate and is used for guiding the rubber material to the runner plate assembly;

the runner plate assembly comprises a runner plate, a guide post, an automatic demolding mechanism and a mold hoisting mechanism, wherein a core is arranged in the center of the runner plate, is positioned right below a main runner nozzle and is used for placing an oil seal framework and receiving rubber materials injected by the main runner nozzle; the automatic demolding mechanism is arranged around the mold core and comprises an ejection block, an inner hexagonal shaft shoulder screw and a powerful spring, the ejection block is arranged above the mold core for placing the oil seal framework, the ejection block is movably clamped on the inner hexagonal shaft shoulder screw, and the spring sleeved on the inner hexagonal shaft shoulder screw is arranged between the flow channel plate and the ejection block; the mold hoisting mechanism comprises a demolding rod and a demolding sleeve, wherein the upper end of the demolding rod is fixed on the injection plate, and the lower end of the demolding rod is movably clamped in the demolding sleeve and is matched and positioned with a demolding rod hole in the lower template; the guide post is fixed on the runner plate and is matched with the guide hole on the lower template for guiding;

and the lower template is provided with a stripping rod hole and a guide hole for positioning the oil seal framework and the forming part oil seal cavity.

Compared with the prior art, the utility model has the following remarkable characteristics and positive effects: compared with the traditional injection mold, the injection mold has a simple structure, and when the mold is opened, the demolding of an oil seal product is realized without adding an auxiliary tool on equipment, and only the structure of the mold is optimized; the injection plate assembly is responsible for guiding the rubber material to the runner plate; the ejection block, the inner hexagonal shaft shoulder screw and the strong spring in the runner plate assembly form an automatic ejection structure, so that when the mold is opened, the oil seal can be separated from the runner plate assembly through the elasticity of the strong spring; the demoulding rod and the demoulding sleeve form a demoulding hoisting mechanism which is connected with the injection plate and the runner plate assembly, the runner plate can be successfully separated from the injection plate according to the self gravity when the mould is opened, and the separation distance is determined by the demoulding rod and the demoulding sleeve; the lower template is mainly used for positioning the framework and forming part of an oil seal cavity. The utility model adds an automatic demoulding structure in the runner plate assembly, and the connection and the separation between the runner plate and the injection plate are realized by a demoulding, demoulding and hoisting mechanism, and the two technologies are formed, thereby effectively simplifying the structural design of the injection equipment. The automatic ejection mechanism has a simple structure, can realize relatively complex actions such as automatic ejection, demolding, injection and the like by utilizing the structural optimization of the mold, and can effectively simplify the mechanism design of the injection machine, thereby greatly saving the production and manufacturing cost, reducing the working strength and improving the working efficiency.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a mold clamping state according to the present invention.

Fig. 2 is a schematic structural diagram of an open state according to the present invention.

In the figure: 1. the injection mold comprises an injection plate, 2, a main injection nozzle, 3, an ejection block, 4, an inner hexagonal cylinder head shaft shoulder screw, 5, a strong spring, 6, a limiting hole, 7, a stripping rod, 8, a stripping guide pipe, 9, a runner plate, 10, a lower template, 11, a guide pillar, 12, an oil seal framework, 13, a mold core, 14, a stripping rod hole, 15 and a guide hole.

Detailed Description

The hot runner injection mold for the rubber framework oil seal, referring to fig. 1 and 2, is composed of an injection plate assembly, a runner plate assembly and a lower mold plate, wherein:

the injection plate assembly consists of an injection plate 1 and a main injection nozzle 2, the main injection nozzle 2 is connected with the injection plate 1 by using hexagon socket head cap screws, the main injection nozzle 2 can be designed into a standard component by the design, oil seal products of different models can be obtained by only replacing the injection plate 1, the main injection nozzle 2 is matched with the injection nozzle of the injection machine, and the 60-degree spherical surface conical fit is adopted, so that the rubber is prevented from overflowing during injection;

the runner plate assembly comprises a runner plate 9, a guide post 11, an automatic demoulding mechanism and a mould hoisting mechanism, wherein a core 13 is arranged in the center of the runner plate 9, and the core 13 is positioned right below the main injection nozzle 2 and used for placing an oil seal framework 12 and receiving glue injected by the main injection nozzle 2; the automatic demolding mechanism is arranged around the core 13 and comprises an ejection block 3, an inner hexagonal shoulder screw 4 and a strong spring 5, the ejection block 3 is arranged above the outer side of the core 13 for placing the oil seal framework 12, the ejection block 3 is movably clamped on the inner hexagonal shoulder screw 4, the upper end of the inner hexagonal shoulder screw 4 is arranged in a screw hole of the runner plate 9, and the strong spring 5 sleeved on the inner hexagonal shoulder screw 4 is arranged between the runner plate 9 and the ejection block 3; the mold hoisting mechanism comprises a demolding rod 7 and a demolding sleeve 8, the upper end of the demolding rod 7 is fixed on the injection plate 1, the lower end of the demolding rod 7 is movably clamped with the demolding sleeve 8, the demolding sleeve 8 is movably clamped in a limiting hole 6 in a runner plate 9 so as to ensure that the demolding rod 7 and the demolding sleeve 8 cannot be ejected from the upper part of the runner plate 9, and the demolding rod 7 and the demolding sleeve 8 are matched and positioned with an ejection rod hole in a lower template 10 below; the guide post 11 is fixed on the runner plate 9 and is matched with the guide hole on the lower template 10 below for guiding;

the lower template 10 is provided with a stripping rod hole 14 and a guide hole 15 for positioning the oil seal framework 12 and a forming part oil seal cavity.

Since the sizes of different oil-sealed products are different, the positions and the number of the injected rubber are different, and the runner plate 9 is required to divide the rubber entering the main injection nozzle 2 into different positions. The ejection block 3, the inner hexagonal cylinder head shaft shoulder screw 4 and the strong spring 5 form an internal automatic ejection mechanism, and the internal automatic ejection mechanism is connected with the runner plate 9 through the inner hexagonal cylinder head shaft shoulder screw 4 to form a whole. When the die is closed, as shown in fig. 1, the strong spring 5 is compressed under stress and attached to the runner plate 9 to ensure the size of a cavity, and when the die is opened, as shown in fig. 2, the elastic force of the strong spring 5 is released to spring the ejection block 3 away to separate from the runner plate 9, so that the oil seal framework 12 is separated from the runner plate assembly, and the automatic demolding of an oil seal product is realized. The guide post 11 is mainly used for positioning the runner plate assembly and the lower template 10 during die assembly. The core 13 is mainly an internal cavity of a forming oil seal and is connected with the runner plate 9 through an inner hexagon screw, and a large threaded hole adopted by an inner hole of the core 13 is larger than the large diameter of the inner hexagon screw connected with the core, so that the core 13 can be conveniently taken out of the runner plate 9.

In order to simplify the mechanical action of the injection machine, the utility model designs a set of connecting mechanism for connecting the injection plate assembly and the runner plate assembly together. The connecting mechanism consists of a stripping rod nut 6, a stripping rod 7 and a stripping guide pipe 8, and the size design requirements of the stripping rod 7 and the stripping guide pipe 8 can be determined according to the actual opening and the required mold opening stroke of the injection machine. The separation of the injection plate 1 and the runner plate 9 mainly depends on the self gravity of the runner plate assembly to separate, if the injection plate 1 and the runner plate 9 are difficult to separate due to the adhesive force of rubber, strong springs 5 can be added between the two plates to be distributed around the template to assist in opening the mold. The lower template 10 is mainly used for positioning an oil seal framework 12 and simultaneously forming a part of an oil seal cavity, and the positioning of the lower template and a runner plate assembly is mainly completed by a guide pillar 11.

Claims (1)

1. The utility model provides a hot runner injection mold for rubber frame oil blanket, characterized by this mould comprises injection plate assembly, runner plate assembly and lower bolster, wherein:

the injection plate assembly comprises an injection plate, a main injection nozzle and a stripping rod, wherein the main injection nozzle is arranged in the center of the injection plate and used for guiding rubber materials to the runner plate assembly;

the runner plate assembly comprises a runner plate, a guide post, an automatic demoulding mechanism and a mould hoisting mechanism, wherein a core is arranged in the center of the runner plate, is positioned right below the main injection nozzle and is used for placing an oil seal framework and receiving a rubber material injected by the main injection nozzle; the automatic demolding mechanism is arranged around the mold core and comprises an ejection block, an inner hexagonal shaft shoulder screw and a powerful spring, the ejection block is arranged above the mold core for placing the oil seal framework, the ejection block is movably clamped on the inner hexagonal shaft shoulder screw, and the spring sleeved on the inner hexagonal shaft shoulder screw is arranged between the flow channel plate and the ejection block; the mold hoisting mechanism comprises a demolding rod and a demolding sleeve, wherein the upper end of the demolding rod is fixed on the injection plate, and the lower end of the demolding rod is movably clamped in the demolding sleeve and is matched and positioned with a demolding rod hole in the lower template; the guide post is fixed on the runner plate and is matched with the guide hole on the lower template for guiding;

and the lower template is provided with a stripping rod hole and a guide hole for positioning the oil seal framework and the forming part oil seal cavity.

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