Core-pulling type mold without ejector pin

Abstract

The utility model discloses a core-pulling type mold without an ejector pin, which comprises a front mold and a rear mold, and is characterized by further comprising a push plate and a molding piece consisting of a rear molding insert and a front molding insert, a front insert groove is arranged in the front mold, the front molding insert is positioned in the front insert groove, a push hole is arranged on the push plate, and the rear molding insert is positioned in the front molding insert groove. The rear forming insert is located in the push hole and fixed to the rear mold, a driving unit and a core rod driven by the driving unit are arranged on the push plate, a forming cavity and a core hole communicated with the forming cavity are formed in the forming piece, the core rod is inserted into the forming cavity through the core hole, and a demolding piece abutting against a product is arranged on the push plate. And the front mold is connected with the push plate through a fixed-stroke connecting assembly.

Description

Technical Field

[0001] The utility model relates to a mold, in particular to a mold without ejector pins for core pulling. Background Art

[0002] Molds are commonly used equipment in modern industrial production. However, after the general mold is opened, it is usually ejected by the ejector pin plate driving the ejector pins. But for some products with high appearance requirements, the above-mentioned ejection structure is not applicable because the ejector pins are likely to leave marks on the product surface, resulting in unqualified products. Therefore, the applicant has designed a mold without ejector pins for core pulling to solve the above problems. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a mold without ejector pins for core pulling.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] The mold without ejector pins for core pulling includes a front mold and a rear mold, and is characterized in that: it further includes a push plate, a forming member composed of a rear forming insert and a front forming insert, a front insert groove is provided in the front mold, the front forming insert is located in the front insert groove, a push hole is provided on the push plate, the rear forming insert is located in the push hole and is fixed to the rear mold, a driving unit and a core rod driven by the driving unit are provided on the push plate, a forming cavity and a core hole communicating with the forming cavity are provided in the forming member, the core rod is inserted into the forming cavity through the core hole, and a demolding member abutting against the product is provided on the push plate, and the front mold is connected to the push plate through a fixed-stroke connection assembly.

[0006] The fixed-stroke connection assembly includes a rubber plug and a pull rod. The two ends of the rubber plug are respectively connected to the front mold and the push plate. A pull hole and a stroke hole communicating with the pull hole are provided on the push plate. The pull rod is located in the pull hole, and the end cap of the pull rod is located in the stroke hole and can move relative to the stroke hole to abut against the bottom of the stroke hole.

[0007] A demolding hole is provided on the demolding member, and the core rod passes through the demolding hole.

[0008] A sliding seat capable of sliding along the push plate is provided on the push plate. The core rod is fixed to the sliding seat, and the driving unit is fixed to the sliding seat.

[0009] A chute is provided on the push plate, and a slide bar cooperating with the chute is provided on the sliding seat.

[0010] A straight groove and a pressing plate are provided on the push plate, the straight groove and the pressing plate form a T-shaped groove, and the slide bar is a corresponding T-shaped structure.

[0011] The beneficial effects of the present utility model are as follows: Through the driving unit and the core rod, after mold opening, the workpiece can be demolded by core pulling with the core rod, eliminating the need for ejector pins, thus avoiding leaving marks on the surface of the product and meeting the higher requirements of customers. Description of the Drawings

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0013] Figure 1 is the overall structural view of the present utility model;

[0014] Figure 2 is the internal structural view of the present utility model;

[0015] Figure 3 is the overall structural view of the front mold and the front forming insert;

[0016] Figure 4 is the sectional structural view of the present utility model;

[0017] Figure 5 is the structural view of the driving unit;

[0018] Figure 6 is the structural view of the workpiece. Detailed Embodiments

[0019] The advantages, features, and implementation methods of the present disclosure will be clarified by the following embodiments described with reference to the drawings. However, the present disclosure can be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Instead, 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 only defined by the scope of the claims.

[0020] The shapes, sizes, proportions, angles, and numbers disclosed in the drawings used to describe the embodiments of the present disclosure are only examples, so the present disclosure is not limited to the details shown. Throughout the specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of related known functions or configurations is determined to unnecessarily obscure the key points of the present disclosure, the detailed description will be omitted. In the case of using "comprising", "having", and "including" described in this specification, other components can be added unless "only" is used. Unless otherwise indicated, terms in the singular form can include the plural form.

[0021] When interpreting an element, although not explicitly described, the element is understood to include an error range.

[0022] When describing positional relationships, for example, when a positional relationship is described as "on", "above", "below", and "adjacent to", one or more components may be arranged between two other components unless "immediately" or "directly" is used.

[0023] When describing temporal relationships, 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.

[0024] 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 the present disclosure.

[0025] As can be fully understood by those skilled in the art, the features of different embodiments of the present disclosure may be partially or wholly coupled or combined with each other, and may cooperate with each other in various ways and be technically driven. The embodiments of the present disclosure may be executed independently of each other, or may be executed together in a mutually dependent relationship.

[0026] Refer to Figures 1 to 6, the present utility model discloses a thimble-free core-pulling mold, which includes a front mold 1 and a rear mold 2, and also includes a push plate 3 and a forming member 6 composed of a rear forming insert 4 and a front forming insert 5. The push plate 3 is located between the front mold 1 and the rear mold 2. A front insert groove is provided in the front mold 1, and the front forming insert 5 is fixed in the front insert groove. A push hole is provided on the push plate 3, and the rear forming insert 4 is located in the push hole and fixed to the rear mold 2. A driving unit 7 and a core rod 8 driven by the driving unit 7 are provided on the push plate 3. The driving unit 7 is preferably an oil cylinder, and the oil cylinder is fixed to the push plate 3 through a cylinder seat. A forming cavity and a core hole communicating with the forming cavity are provided in the forming member 6. Of course, both the rear forming insert 4 and the front forming insert 5 have forming grooves 9, and the forming cavity is composed of two forming grooves 9. The core rod 8 is inserted into the forming cavity through the core hole, and the space between the core rod 8 and the forming cavity is used for the forming of the workpiece 15. The workpiece 15 in this application is a cylinder with different diameters at both ends. And a demolding member 10 that abuts against the product is provided on the push plate 3. The demolding member 10 in this application is a square iron block. A demolding hole is provided on the demolding member 10, and the core rod 8 passes through the demolding hole. In this way, when core-pulling, the core rod 8 can retract through the demolding hole, and the end face of the product can abut against the demolding member 10 and be detached from the core rod 8, thus realizing the core-pulling action. Of course, before core-pulling, we need to lift the workpiece 15 from the forming groove 9 of the rear forming insert 4 to separate it from the rear forming insert 4 before core-pulling. Therefore, the front mold 1 is connected to the push plate 3 through a fixed-stroke connection assembly.

[0027] As shown in the figure, the fixed-stroke connection assembly specifically includes a rubber plug 11 and a pull rod 12. Both ends of the rubber plug 11 are respectively connected to the front mold 1 and the push plate 3. A pull hole and a stroke hole communicating with the pull hole are provided on the push plate 3. The pull rod 12 is located in the pull hole, and the end cap of the pull rod 12 is located in the stroke hole and can move relative to the stroke hole and abut against the bottom of the stroke hole. Of course, the pull rod 12 is fixed to the rear mold 2. The rubber plug 11 is a commonly purchased part, so the structure of the rubber plug 11 will not be described in detail. Of course, one end of the rubber plug 11 is fixed to the front mold 1, and the other end of the rubber plug 11 is tightly fitted and connected to the push plate 3.

[0028] As shown in the figure, in order to better realize the core-pulling action, a sliding seat 13 that can slide along the push plate 3 is provided on the push plate 3. The core rod 8 is fixed to the sliding seat 13, and the driving unit 7 is fixed to the sliding seat 13. A sliding groove is provided on the push plate 3, and a sliding strip 14 that cooperates with the sliding groove is provided on the sliding seat 13. A straight groove and a pressing plate are provided on the push plate 3, and the straight groove and the pressing plate form a T-shaped groove. The sliding strip 14 is a corresponding T-shaped structure. The above structure is not only convenient for manufacturing but also can ensure the smoothness of the core-pulling action.

[0029] The principle of this structure is as follows: When the mold is opened, the front mold 1 and the front forming insert 5 move together along the mold opening direction. The ejector plate 3 is vertically arranged perpendicular to the horizontal plane. During the movement, the ejector plate 3 is driven to move together through the rubber plug 11. While the ejector plate 3 moves, it drives the oil cylinder, the slide block 13, the core rod 8, and the demolding part 10 arranged on the ejector plate 3 to move together. The core rod 8 drives the workpiece 15 to move and disengages the workpiece 15 from the forming groove 9 of the rear forming insert 4 until the end cap abuts against the bottom of the stroke hole and the ejector plate 3 cannot move. At this time, the front mold 1 and the front forming insert 5 continue to move, and the ejector plate 3 is separated from the rubber plug 11. Then, the front mold 1 and the front forming insert 5 are also separated from the core rod 8 and the workpiece 15. Then the oil cylinder starts to act on the workpiece 15, driving the slide block 13, the core rod 8, and the workpiece 15 to retract. While the workpiece 15 retracts, it abuts against the demolding part 10, so as to be disengaged from the core rod 8, thus completing the entire demolding process.

[0030] The above has introduced in detail a thimble-free core-pulling mold provided by an embodiment of the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. The thimble-less core-pulling mold, including a front mold and a rear mold, is characterized in that: It further includes a push plate, a forming member composed of a rear forming insert and a front forming insert. There is a front insert groove in the front mold, and the front forming insert is located in the front insert groove. There is a push hole on the push plate, and the rear forming insert is located in the push hole and fixed to the rear mold. The push plate is provided with a driving unit and a core rod driven by the driving unit. The forming member is provided with a forming cavity and a core hole communicating with the forming cavity. The core rod is inserted into the forming cavity through the core hole, and the push plate is provided with a demolding member that abuts against the product. The front mold is connected to the push plate through a fixed-stroke connection assembly.

2. The thimble-less core-pulling mold according to claim 1, wherein: The fixed-stroke connection assembly includes a rubber plug and a pull rod. The two ends of the rubber plug are respectively connected to the front mold and the push plate. The push plate is provided with a pull hole and a stroke hole communicating with the pull hole. The pull rod is located in the pull hole, and the end cap of the pull rod is located in the stroke hole and can move relative to the stroke hole and abut against the bottom of the stroke hole.

3. The thimble-less core-pulling mold according to claim 1, wherein: The demolding member is provided with a demolding hole, and the core rod passes through the demolding hole.

4. The thimble-less core-pulling mold according to claim 1, characterized in that: The push plate is provided with a sliding seat that can slide along the push plate. The core rod is fixed to the sliding seat, and the driving unit is fixed to the sliding seat.

5. The thimble-less core-pulling mold according to claim 4, wherein: The push plate is provided with a chute, and the sliding seat is provided with a slide bar that cooperates with the chute.

6. The thimble-less core-pulling mold according to claim 5, wherein: The push plate is provided with a straight groove and a pressing plate, and the straight groove and the pressing plate form a T-shaped groove. The slide bar is a corresponding T-shaped structure.

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