CN211763193U - Top-injection-free mold - Google Patents

Abstract

The utility model discloses a free ejector injection mold, comprising a front mold and a rear mold, wherein a front cavity is arranged in the front mold, and a rear cavity is arranged in the rear mold, and the characteristic is that: a forming platform, a forming block, a slide plate, a top plate hole and an ejector plate located in the top plate hole are arranged on the rear mold, an ejector plate is arranged on the ejector plate, the ejector plate is arranged with an ejector column, the ejector column passes through a sliding hole arranged on the inner wall of the top plate hole and is fixed to the slide plate, the slide plate is arranged with a plate slide groove, the forming block is arranged with an inclined guide hole and a sliding block matched with the plate slide groove, the sliding block is located in the plate slide groove, the rear cavity is surrounded by the forming platform and the forming block, an inclined guide column is arranged in the rear mold, an avoidance hole is arranged on the bottom surface of the plate slide groove, the inclined guide column passes through the avoidance hole and is matched with the inclined guide hole, the slide plate slides through a sliding shaft fixed on the rear mold, the slide plate is arranged with a core hole, and the forming platform is slidably matched with the core hole.

Description

A top-free injection mold

technical field

The utility model relates to an injection mold, in particular to a top-free injection mold.

Background technique

With the development of society, the application of plastic products is very extensive, and most of the plastic products are produced by the injection molding process. The common injection molding method is to inject the molten plastic raw material into the metal mold for molding. The metal mold is usually composed of a front mold and a rear mold. Drive down to move, and eject the formed product from the forming cavity in the mold through the ejector pin on the ejector plate.

However, some products have higher requirements on the appearance, and the surface is required to be very smooth, without scratches, roughness, etc., so the method of directly contacting the product with the ejector pin to eject the product cannot meet the above requirements. Therefore, the applicant A top-free injection mold is designed to solve the problem.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the utility model provides a top-free injection mold.

The technical scheme adopted by the utility model to solve its technical problems is:

A top-free injection mold, comprising a front mold and a rear mold, the front mold is provided with a front cavity, and the rear mold is provided with a rear cavity, characterized in that: the rear mold is provided with a molding table, The forming block, the sliding plate, the top plate hole and the thimble plate located in the top plate hole, the thimble plate is provided with a top column, the top column is fixed with the sliding plate through the sliding hole arranged on the inner wall of the top plate hole, and the sliding plate is provided with a sliding plate on the sliding plate. The forming block is provided with an inclined guide hole and a sliding block matched with the plate chute, the sliding block is located in the plate sliding groove, the rear cavity is surrounded by the forming table and the forming block, There is an oblique guide column inside, and the bottom surface of the plate chute is provided with an avoidance hole, and the oblique guide column passes through the avoidance hole to cooperate with the oblique guide hole. A core hole is arranged thereon, and the forming table is slidably matched with the core hole.

The rear mold includes a first plate, a second plate and two side plates, the top plate hole is surrounded by the first plate, the second plate and the two side plates, and the forming table is located on the second plate.

The inner walls on both sides of the plate chute are provided with inner chute, and the sliding block is provided with a sliding bar matched with the inner chute.

The bottom of the plate chute is oppositely provided with an inner boss, the inner boss is provided with a limit block fixed by screws, and the inner chute is composed of the inner boss, the limit block and the slot of the plate chute. Bottom enclosure.

The sliding plate is provided with a thimble plate limiting column.

The beneficial effect of the utility model is as follows: the mold of this structure adopts a sliding plate structure, and then the top column on the ejector plate does not directly contact the workpiece but pushes up the sliding plate, and the sliding plate drives the molding block to push the workpiece out of the molding table, and then the workpiece is pushed out during the molding process. When the block is raised, it is separated from the forming table by the drive of the inclined guide column, so that the workpiece is released. The above structure avoids the thimble directly pressing the workpiece (because the thimble presses the workpiece with great force, it is easy to form scratches and roughness on the workpiece. ), thus ensuring the smoothness of the workpiece surface.

Description of drawings

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the overall view of the present utility model;

Fig. 2 is the perspective view of the rear mold of the present utility model;

Fig. 3 is the internal structure view of the rear mold of the present utility model;

Figure 4 is an overall view of the forming block;

Fig. 5 is an overall view of the workpiece.

Detailed ways

1 to 5, the utility model discloses a top-free injection mold, including a front mold 1 and a rear mold 2, the front mold 1 is provided with a front cavity, and the rear mold 2 is provided with a back mold Cavity, the back mold 2 includes plate one 3, plate two 4 and two side plates 5, the two side plates 5 are between plate one 3 and plate two 4, the top plate hole is composed of plate one 3, plate two 4 and two side plates 5 The forming table 6 is located on the second plate 4 .

As shown in the figure, the rear mold 2 is also provided with a forming block 7, a sliding plate 8 and a thimble plate 9 located in the top plate hole. The ejector pin plate 9 is provided with a top column 10, and the top column 10 passes through and is arranged in the top plate hole The sliding hole on the inner wall is fixed with the sliding plate 8, the sliding plate 8 is provided with a sliding groove 11, the forming block 7 is provided with an inclined guide hole 12 and a sliding block 13 that cooperates with the sliding groove 11. 13 is located in the plate chute 11. The rear cavity is surrounded by the forming table 6 and the forming block 7. The rear cavity is designed according to the shape of the workpiece 21, so the specific shape will not be described in detail. Guide post 14, the bottom surface of the plate chute 11 is provided with an avoidance hole 15, the oblique guide post 14 passes through the avoidance hole 15 and cooperates with the inclined guide hole 12, the avoidance hole 15 is relatively large, so when the slide plate 8 moves, the avoidance hole 15 The sliding plate 8 slides through the sliding shaft 16 fixed on the rear mold 2, and the sliding plate 8 is provided with a core hole, and the forming table 6 is slidably matched with the core hole. There are also through holes on the middle plate 1 3, and the cylinder rod of the hydraulic cylinder on the injection molding machine pushes the ejector plate 9 to move through the through holes.

As shown in the figure, inner walls 17 on both sides of the plate chute 11 are provided with inner chute 17 , and the sliding block 13 is provided with a sliding bar 18 matched with the inner chute 17 . The bottom of the plate chute 11 is oppositely provided with an inner boss, the inner boss is provided with a limit block 19 fixed by screws, and the inner chute 17 is composed of the inner boss, the limit block 19 and the plate The enclosing of the groove bottom of the chute 11 is for the convenience of processing and installation.

As shown in the figure, the sliding plate 8 is provided with a thimble plate limiting column 20 , which can prevent the ejector column 10 from pushing the forming block 7 away from the inclined guide column 14 .

The top-free injection mold provided by the embodiments of the present utility model has been described in detail above. The principles and implementations of the present utility model are described with specific examples in this paper. The descriptions of the above embodiments are only used to help understanding. The method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification It should not be construed as a limitation of the present invention.

Claims (5)

1. a top-free injection mold, comprising a front mold, a rear mold, the front mold is provided with a front cavity, the rear mold is provided with a rear cavity, and it is characterized in that: the rear mold is provided with a molding The table, the forming block, the sliding plate, the top plate hole and the thimble plate located in the top plate hole, the thimble plate is provided with a top column, the top column is fixed with the sliding plate through the sliding hole arranged on the inner wall of the top plate hole, and the sliding plate is provided with A plate chute, the forming block is provided with an inclined guide hole and a slider matched with the plate chute, the slider is located in the plate chute, the rear cavity is surrounded by a forming table and a forming block, the The rear mold is provided with an oblique guide post, and the bottom surface of the plate chute is provided with an avoidance hole, and the oblique guide column passes through the avoidance hole to cooperate with the oblique guide hole, and the slide plate slides through the sliding shaft fixed on the rear mold, so The slide plate is provided with a core hole, and the forming table is slidably matched with the core hole. 2. A top-free injection mold according to claim 1, characterized in that: the rear mold comprises a first plate, a second plate and two side plates, and the top plate hole is surrounded by the first plate, the second plate and the two side plates The forming table is located on the second plate. 3. A top-free injection mold according to claim 1, wherein the inner walls of the two sides of the plate chute are provided with inner chute, and the sliding block is provided with a sliding slot matched with the inner chute. strip. 4 . The top-free injection mold according to claim 3 , wherein the bottom of the plate chute is oppositely provided with an inner boss, and the inner boss is provided with a limit block fixed by screws. 5 . and the inner chute is surrounded by the inner boss, the limit block and the groove bottom of the plate chute. 5 . The top-free injection mold according to claim 1 , wherein the slide plate is provided with an ejector plate limit post. 6 .

Images