Forced pushing type injection mold

Abstract

The utility model discloses a forced pushing type injection mold which comprises a front mold, a rear mold, an ejector pin, a front mold insert arranged on the front mold and a rear mold insert arranged on the rear mold, and is characterized by further comprising a forming rod arranged on the rear mold, a forming sliding block, a front forming groove formed in the front mold insert and a rear forming groove formed in the rear mold insert, the front forming groove and the rear forming groove form a forming cavity, a groove bottom hole and an ejector pin hole are formed in the groove bottom of the rear forming groove, the forming rod penetrates through the groove bottom hole, the end face of the forming rod is located in the rear forming groove, the ejector pin penetrates through the ejector pin hole, the end face of the ejector pin is located in the rear forming groove, and the forming sliding block is in linkage with the front mold through an inclined ejector structure. The rear mold insert is provided with a side notch communicated with the rear forming groove, and the forming end face of the forming sliding block is located at the position of the side notch.

Description

Technical Field

[0001] The utility model relates to a mold, in particular to a strong-push type injection mold. Background Art

[0002] Some workpieces have an inner hole with an undercut. Conventional mold opening structures typically incorporate an undercut demolding mechanism with a core-pulling mechanism. This undercut demolding mechanism divides the mold's undercut into multiple small sliders, with a shovel positioned at the center of the undercut. The shovel is slidably connected to each slider via a slot. Furthermore, the mating areas between adjacent sliders and shovels are designed with different inclinations. When the shovel performs a core-pulling motion along the undercut's axial direction, away from the molded part, the sliders with different inclinations in the mating areas move toward the center of the undercut at different speeds until they are free of the undercut area of ​​the molded part. Demolding is then performed by core-pulling. This not only complicates the structure but also the demolding process, increasing production costs and reducing efficiency.

[0003] The present application provides a push-type injection mold to solve the above problems. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a strong-push type injection mold.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A push-type injection mold comprises a front mold, a rear mold, an ejector pin, a front mold insert arranged on the front mold, and a rear mold insert arranged on the rear mold, and is characterized in that it also comprises a molding rod arranged on the rear mold, a molding slider, a front molding groove arranged on the front mold insert, and a rear molding groove arranged on the rear mold insert, the front molding groove and the rear molding groove form a molding cavity, the bottom of the rear molding groove is provided with a groove bottom hole and an ejector pin hole, the molding rod passes through the groove bottom hole and the end face of the molding rod is located in the rear molding groove, the ejector pin passes through the ejector pin hole and the end face of the ejector pin is located in the rear molding groove, the molding slider is linked to the front mold through a slanted top structure, the rear mold insert is provided with a side notch that passes through the rear molding groove, and the molding end face of the molding slider is located at the side notch.

[0007] The inclined top structure includes a slider groove arranged on the front mold insert, an inclined hole on the forming slider, and an inclined top rod fixed to the front mold insert. The forming slider slides in cooperation with the slider groove. The inclined top rod is located in the inclined hole and can drive the forming slider to slide along the slider groove. A reset spring is provided between the forming slider and the front mold insert to reset the forming slider.

[0008] The ejector pin is a flat plate, a side groove is provided on the flat plate, and the bottom surface of the side groove is the ejection surface.

[0009] It also includes core rod 1, core rod 2, and a core-pulling drive mechanism arranged oppositely. The core rod 1 and core rod 2 are connected to the corresponding core-pulling drive mechanism, and core holes are provided on both sides of the molding cavity. The core rod 1 and core rod 2 pass through the corresponding core holes and are located in the molding cavity.

[0010] Semicircular holes are provided on both end walls of the front forming groove and the rear forming groove, and the core hole is formed by corresponding semicircular holes.

[0011] The core pulling drive mechanism includes an oil cylinder and a slide seat arranged on the rear mold. The core rod 1 and the core rod 2 are connected to the corresponding slide seats, and the slide seats are slidably matched with the seat slide grooves on the rear mold.

[0012] The beneficial effects of the utility model are as follows: the mold structure of the utility model can not only injection mold a shell with an undercut in the inner hole, but also can realize that when the mold is opened, the molding slider is first withdrawn to leave deformation space for the shell, and then the shell is forcibly ejected by the ejector pin, thereby realizing demoulding. The above structure is simple and the demoulding process is also reduced, thereby improving the demoulding efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural view of the utility model;

[0015] Figure 2 This is a view of the internal structure of the utility model;

[0016] Figure 3 This is an exploded structural view of the present utility model;

[0017] Figure 4 It is the structural view of the front mold;

[0018] Figure 5 It is a structural view of the front mold insert;

[0019] Figure 6 This is the exploded structural view of the rear mold insert, molding rod, and ejector pin;

[0020] Figure 7 It is a structural view of a shell in another embodiment. DETAILED DESCRIPTION

[0021] The advantages and features of the present disclosure and its implementation methods will be illustrated by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete and will fully convey the scope of the present disclosure to those skilled in the art. Furthermore, the present disclosure is limited only by the scope of the claims.

[0022] The shapes, sizes, proportions, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are merely examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when a detailed description of a related known function or configuration is determined to be unnecessary to obscure the focus of the present disclosure, the detailed description will be omitted. Where “including”, “having” and “comprising” described in this specification are used, other components may be added unless “only” is used. Unless otherwise indicated, terms in the singular may include plural forms.

[0023] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0024] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts, unless "immediately" or "directly" is used.

[0025] When describing a temporal relationship, for example, when a temporal order is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0026] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of this disclosure.

[0027] As will be fully appreciated by those skilled in the art, the features of the different embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0028] Reference Figures 1 to 6The utility model discloses a strong push injection mold, including a front mold 1, a back mold 2, an ejector pin 3, a front mold insert 4 arranged on the front mold 1, and a back mold insert 5 arranged on the back mold 2. Of course, there are insert grooves 6 in the front mold 1 and the back mold 2. The front mold insert 4 and the back mold insert 5 are locked in the corresponding insert grooves 6 by screws. A front molding groove 7 is provided on the front mold insert 4 and a back molding groove 8 is provided on the back mold insert 5. When the mold is closed, the front molding groove 7 and the back molding groove 8 are combined into a molding cavity. The mold also includes a molding rod 9 and a molding slider 10 arranged on the back mold 2. The bottom of the back molding groove 8 is provided with a groove bottom hole 11 and a groove bottom hole 11. The molding rod 9 passes through the bottom hole 11 of the groove and the end face of the molding rod 9 is located in the post-molding groove 8. The ejector pin 3 passes through the ejector pin hole 12 and the end face of the ejector pin 3 is located in the post-molding groove 8. The molding slider 10 is linked to the front mold 1 through the inclined top structure. The rear mold insert 5 is provided with a side notch 13 that passes through the post-molding groove 8. The molding end face of the molding slider 10 is located at the side notch 13. Through the above structure, a shell with an undercut in the inner hole can be injection molded. The cavity wall of the molding cavity, the end face of the ejector pin 3 and the molding end face jointly mold the outer surface of the shell, and the molding rod 9 can mold the inner hole and the undercut of the shell.

[0029] The specific principle is as follows: when the mold is opened, the front mold 1 and the front mold insert 4 move along the mold opening direction, and the front mold insert 4 drives the forming slider 10 to withdraw in the direction perpendicular to the mold opening through the inclined top structure, leaving deformation space for the shell, and then drives the ejector 3 through the ejector plate to forcibly eject the shell out of the rear molding groove 8 and separate it from the molding rod 9, thereby realizing demolding. In order to ensure uniform deformation, the molding slider 10 of this application has two relative settings.

[0030] As shown in the figure, the inclined top structure includes a slider groove 14 arranged on the front mold insert 4, an inclined hole 24 on the forming slider 10, and an inclined top rod 15 fixed to the front mold insert 4. The forming slider 10 slides in cooperation with the slider groove 14. The inclined top rod 15 is located in the inclined hole 24 and can drive the forming slider 10 to slide along the slider groove 14. A reset spring (not shown in the figure) is provided between the forming slider 10 and the front mold insert 4 to reset the forming slider 10. Through the above structure, when the mold is opened, the front mold insert 4 moves along the mold opening direction together with the inclined top rod 15, and the forming slider 10 moves linearly along the slider groove 14 under the joint action of the inclined top rod 15, the inclined hole 24 and the slider groove 14. The slider groove 14 is a T-shaped groove, and a corresponding T-shaped slider is provided on the forming slider 10.

[0031] The end of the inclined ejector rod 15 is provided with an end cap 16, and the front mold insert 4 is provided with an inclined countersunk hole 17. The inclined ejector rod 15 is located in the countersunk hole 17. Therefore, when the front mold insert 4 is fixed to the front mold 1, the inclined ejector rod 15 can be fixed by the cooperation of the countersunk hole 17 and the end cap 16. Of course, when the mold is closed, the reset spring can push the molding slider 10 to reset.

[0032] As a preferred structure, the ejector pin 3 is a flat plate, and a side groove 18 is provided on the flat plate. The bottom surface of the side groove 18 is the ejection surface. The bottom surface of the side groove 18 is a circular ring segment that can completely overlap with the bottom end surface of the shell, so that the force is evenly applied. The flat plates of this application are two oppositely arranged.

[0033] As a structure of another embodiment, it also includes a core rod 19, a core rod 20, and a core-pulling drive mechanism arranged opposite to each other. The core rod 19 and the core rod 20 are connected to the corresponding core-pulling drive mechanism, and core holes are provided on both sides of the molding cavity. The core rod 19 and the core rod 20 pass through the corresponding core holes and are located in the molding cavity. Compared with the structure of the shell in the previous embodiment, in this embodiment, the shell is increased with long tubes on both sides, such as Figure 7 As shown, the tube hole of the long tube is connected with the inner hole of the shell and the outside in the previous embodiment, and its overall structure is similar to that of a three-way tube. Therefore, by setting the core rod 19 and the core rod 20, the long tubes on both sides can be formed. In this embodiment, the structures of the long tubes on both sides are different. Therefore, when the forming slider 10 withdraws in the direction perpendicular to the mold opening, the core pulling drive mechanism drives the core rod 19 and the core rod 2 to be pulled out from the corresponding tube holes until the core pulling process is completed. After the core pulling process is completed, the ejector plate 3 drives the ejector 3 to forcibly eject the shell out of the rear molding groove 8 and separate it from the molding rod 9, thereby realizing demolding.

[0034] As a further structure of this embodiment, semicircular holes are provided on the end walls of the front forming groove 7 and the rear forming groove 8, and the core hole is composed of corresponding semicircular holes. The above structure is convenient for processing. The core pulling drive mechanism includes a cylinder 21 and a slide 22 arranged on the rear mold 2. The core rod 19 and the core rod 20 are connected to the corresponding slide 22, and the slide 22 is slidably matched with the seat slide 23 on the rear mold 2. In the above structure, the seat slide 23 is a T-shaped groove, and the slide 22 is provided with a corresponding T-shaped slider.

[0035] The above is a detailed introduction to a push-type injection mold provided by an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for general technical personnel in this field, based on the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A push-type injection mold, comprising a front mold, a rear mold, an ejector pin, a front mold insert disposed on the front mold, and a rear mold insert disposed on the rear mold, characterized in that: It also includes a forming rod and a forming slider arranged on the rear mold, a front forming groove arranged on the front mold insert, and a rear forming groove arranged on the rear mold insert. The front forming groove and the rear forming groove form a forming cavity. The bottom of the rear molding groove is provided with a groove bottom hole and an ejector hole. The forming rod passes through the groove bottom hole and the end face of the forming rod is located in the rear molding groove. The ejector passes through the ejector hole and the end face of the ejector is located in the rear molding groove. The forming slider is linked to the front mold through a slanted top structure. The rear mold insert is provided with a side notch that passes through the rear molding groove. The forming end face of the forming slider is located at the side notch.

2. A push-type injection mold according to claim 1, characterized in that: The inclined top structure includes a slider groove arranged on the front mold insert, an inclined hole on the forming slider, and an inclined top rod fixed to the front mold insert. The forming slider slides in cooperation with the slider groove. The inclined top rod is located in the inclined hole and can drive the forming slider to slide along the slider groove. A reset spring is provided between the forming slider and the front mold insert to reset the forming slider.

3. The push-type injection mold according to claim 1, characterized in that: The ejector pin is a flat plate, a side groove is provided on the flat plate, and the bottom surface of the side groove is the ejection surface.

4. The push-type injection mold according to claim 1, characterized in that: It also includes core rod 1, core rod 2, and a core-pulling drive mechanism arranged oppositely. The core rod 1 and core rod 2 are connected to the corresponding core-pulling drive mechanism, and core holes are provided on both sides of the molding cavity. The core rod 1 and core rod 2 pass through the corresponding core holes and are located in the molding cavity.

5. The push-type injection mold according to claim 4, characterized in that: Semicircular holes are provided on both end walls of the front forming groove and the rear forming groove, and the core hole is formed by corresponding semicircular holes.

6. The push-type injection mold according to claim 4, characterized in that: The core pulling drive mechanism includes an oil cylinder and a slide seat arranged on the rear mold. The core rod 1 and the core rod 2 are connected to the corresponding slide seats, and the slide seats are slidably matched with the seat slide grooves on the rear mold.

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