Bent pin double-stroke core-pulling mechanism for mold

Abstract

The utility model discloses a dog-leg cam double-stroke core-pulling mechanism for a die, which comprises a core-pulling slide piece arranged at a lower die plate, a dog-leg cam core-pulling piece matched with the core-pulling slide piece is arranged at an upper die plate, the dog-leg cam core-pulling piece is provided with a first dog-leg cam part and a second dog-leg cam part, the first dog-leg cam part is connected with the second dog-leg cam part, and the first dog-leg cam part is connected with the second dog-leg cam part. A core-pulling opening is formed in the core-pulling slide part, the upper side and the lower side of the core-pulling opening are trumpet-shaped, the upper side of the core-pulling opening is provided with a first upper-side inclined surface and a second upper-side inclined surface, the lower side of the core-pulling opening is provided with a first lower-side inclined surface and a second lower-side inclined surface, the first upper-side inclined surface is parallel to the second lower-side inclined surface, and the second upper-side inclined surface is parallel to the first lower-side inclined surface. By adopting the structural design that the dog-leg cam core-pulling piece is matched with the core-pulling slide piece, a larger core-pulling action can be realized, more auxiliary parts are not needed, and the production cost of the mold is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a bending pin double-stroke core pulling mechanism for molds. Background Art

[0002] When the injection mold is opened, the components on the upper template drive the core-pulling sliders on the lower template, separating the sliders from the rear mold core on the lower template. The finished injection molded parts can then be demolded. Currently, there are two main ways to drive the sliders on the upper template. One is to use a cylinder to drive the core-pulling sliders, and the other is to use inclined guide columns. These two methods are particularly suitable for situations where the stroke of the core-pulling sliders is short but the mold opening spacing is large. However, these two methods are not suitable for situations where the stroke of the core-pulling sliders is large, and both require more auxiliary components, and the corresponding component processing volume is also large, resulting in higher production costs for the mold. To this end, we proposed a bent pin double-stroke core-pulling mechanism for the mold. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a bending pin double-stroke core pulling mechanism for a mold.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bending pin double-stroke core pulling mechanism for a mold, comprising a core pulling sliding member arranged at the lower template, a bending pin core pulling member cooperating with the core pulling sliding member provided at the upper template, the bending pin core pulling member is provided with a first bending pin portion and a second bending pin portion, the first bending pin portion is connected to the second bending pin portion, a core pulling opening is opened at the core pulling sliding member, and the upper and lower sides of the core pulling opening are both trumpet-shaped, the upper side of the core pulling opening is provided with a first upper side inclined surface and a second upper side inclined surface, the lower side of the core pulling opening is provided with a first lower side inclined surface and a second lower side inclined surface, the first upper side inclined surface is parallel to the second lower side inclined surface, the second upper side inclined surface is parallel to the first lower side inclined surface, the inclination of the first bending pin portion is the same as the inclination of the second upper side inclined surface, and the inclination of the second bending pin portion is the same as the inclination of the second lower side inclined surface.

[0005] It is further explained that the lateral oblique end surface of the core-pulling sliding member is in relative sliding contact with the inner oblique surface of the bending pin core-pulling member, and a wear-resistant plate for sliding contact with the inner oblique surface of the bending pin core-pulling member is embedded in the lateral oblique end surface of the core-pulling sliding member.

[0006] It is further explained that the cross sections of the first bent pin portion and the second bent pin portion of the bent pin core-pulling component are both T-shaped.

[0007] It is further explained that a void cavity is provided at the lower template, and when the mold is closed, the second bent pin portion of the bent pin core-pulling component is located at the void cavity of the lower template.

[0008] It is further explained that the upper template is fixedly installed on the upper mold base, the lower template is fixedly installed on the lower mold base, and a needle plate assembly is provided between the lower template and the lower mold base.

[0009] The beneficial effects of the present invention are as follows: the present invention adopts a structural design in which a bending pin core pulling part is matched with a core pulling slide part, and the bending pin core pulling part is provided with a first bending pin part and a second bending pin part for realizing the core pulling action. When the mold is initially opened, the first bending pin part is used to release the clamping force between the bending pin core pulling part and the core pulling slide part. After the initial mold opening, the mold is continued to be opened, and the second bending pin part of the bending pin core pulling part drives the core pulling slide part to move a large lateral stroke, thereby completing the core pulling action of the mold opening. Compared with the existing use of oil cylinders or inclined guide columns to drive the core pulling slide part, the utility model can realize a larger core pulling action, and does not require many auxiliary parts, effectively reducing the production cost of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural sectional view of the utility model when the mold is closed.

[0011] Figure 2 This is a cross-sectional view of the utility model during the initial mold opening.

[0012] Figure 3 This is a cross-sectional view of the utility model during the process of continuing to open the mold after the initial mold opening.

[0013] Figure 4 It is a schematic diagram of the local structure of the utility model.

[0014] Figure 5 It is a structural diagram of the bent pin core pulling part.

[0015] Figure numbers: 10, upper die base; 11, upper template; 12, bent pin core-pulling part; 121, first bent pin portion; 122, second bent pin portion; 123, inner inclined surface; 20, lower die base; 21, lower template; 211, air-avoiding cavity; 22, core-pulling sliding part; 220, core-pulling opening; 221, first upper inclined surface; 222, second upper inclined surface; 223, first lower inclined surface; 224, second lower inclined surface; 225, lateral inclined end surface; 23, wear-resistant plate; 24, needle plate assembly. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0017] Combined with attachment Figure 1As shown, a bending pin double-stroke core pulling mechanism for a mold includes a core pulling slide member 22 arranged at the lower template 21, a bending pin core pulling member 12 cooperating with the core pulling slide member 22 is provided at the upper template 11, the upper template 11 is fixedly installed at the upper mold base 10, the lower template 21 is fixedly installed at the lower mold base 20, and a needle plate assembly 24 is provided between the lower template 21 and the lower mold base 20.

[0018] Combined with attachment Figure 1 and attached Figure 5 As shown, the bent pin core pulling part 12 is provided with a first bent pin portion 121 and a second bent pin portion 122. The first bent pin portion 121 is connected to the second bent pin portion 122. The inclination of the first bent pin portion 121 is specifically 6°, and the inclination of the second bent pin portion 122 is specifically 21°. Figure 3 As shown, a core-pulling opening 220 is provided at the core-pulling slider 22. The upper and lower sides of the core-pulling opening 220 are both trumpet-shaped. A first upper inclined surface 221 and a second upper inclined surface 222 are provided on the upper side of the core-pulling opening 220. A first lower inclined surface 223 and a second lower inclined surface 224 are provided on the lower side of the core-pulling opening 220. The first upper inclined surface 221 is parallel to the second lower inclined surface 224, and the second upper inclined surface 222 is parallel to the first lower inclined surface 223. The inclination of the first bent pin portion 121 is the same as that of the second upper inclined surface 222, and the inclination of the second bent pin portion 122 is the same as that of the second lower inclined surface 224. When the mold is closed, the first bent pin portion 121 of the bent pin core-pulling member 12 abuts against the second upper inclined surface 222 and the first lower inclined surface 223, respectively.

[0019] Combined with attachment Figure 1 and attached Figure 2 As shown, the lateral oblique end surface 225 of the core-pulling slider 22 is in relative sliding contact with the inner oblique surface 123 of the bending pin core-pulling slider 12, and a wear-resistant plate 23 is embedded in the lateral oblique end surface 225 of the core-pulling slider 22 for sliding contact with the inner oblique surface 123 of the bending pin core-pulling slider 12. Figure 4 and attached Figure 5 As shown, when the mold is opened, the core-pulling slider 22 moves laterally under the drive of the bent pin core-pulling member 12, and the lateral inclined end surface 225 of the core-pulling slider 22 is separated from the inner inclined surface 123 of the bent pin core-pulling member 12; on the contrary, when the mold is fully closed, the lateral inclined end surface 225 of the core-pulling slider 22 is in relative sliding contact with the inner inclined surface 123 of the bent pin core-pulling member 12.

[0020] Combined with attachment Figure 5 As shown, the cross sections of the first bent pin portion 121 and the second bent pin portion 122 of the bent pin core pulling member 12 are both T-shaped. Figure 1 and attached Figure 2As shown, the lower template 21 is provided with a cavity 211 to avoid air. When the mold is closed, the second bent pin portion 122 of the bent pin core pulling member 12 is located at the cavity 211 of the lower template 21. Figure 2 As shown, the first bent pin portion 121 of the bent pin core puller 12 is first pulled out from the upper side of the core puller opening 220. At this time, the driving stroke of the core puller slider 22 is relatively small. The inclination of the first bent pin portion 121 is specifically 6°. It is pulled out in a nearly vertical manner to first release the clamping force between the bent pin core puller 12 and the core puller slider 22. The initial mold opening spacing is specifically 28mm. Subsequently, combined with the attached Figure 3 As shown, after the initial mold opening, the mold opening continues, and the second bent pin portion 122 of the bent pin core pulling member 12 is pulled out from the upper side of the core pulling port 220. At this time, the bent pin core pulling member 12 can drive the core pulling slide member 22 to move laterally with a large stroke until the bent pin core pulling member 12 is separated from the core pulling slide member 22, and the core pulling action of the mold opening is completely completed.

[0021] The present invention adopts a structural design in which a bent pin core puller 12 cooperates with a core puller slider 22. The bent pin core puller 12 is provided with a first bent pin portion 121 and a second bent pin portion 122 for achieving the core pulling action. During the initial mold opening, the first bent pin portion 121 is used to release the clamping force between the bent pin core puller 12 and the core puller slider 22. After the initial mold opening, when the mold is continued, the second bent pin portion 122 of the bent pin core puller 12 drives the core puller slider 22 to move laterally with a large stroke, thereby completing the core pulling action of the mold opening. Compared with the existing use of oil cylinders or inclined guide columns to drive the core puller slider, the present invention can achieve a larger core pulling action and does not require many auxiliary components, effectively reducing the production cost of the mold.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] It should be understood that the present invention uses terms such as "first" and "second" to describe various types of information, but such information should not be limited to these terms; these terms are merely used to distinguish information of the same type from one another. For example, "first" information could also be referred to as "second" information, and similarly, "second" information could also be referred to as "first" information without departing from the scope of the present invention.

[0024] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A double-stroke core-pulling mechanism for a mold with a bent pin, comprising a core-pulling slide member (22) provided at a lower mold plate (21), characterized in that: The upper template (11) is provided with a bent pin core pulling member (12) matched with the core pulling sliding member (22), the bent pin core pulling member (12) is provided with a first bent pin portion (121) and a second bent pin portion (122), the first bent pin portion (121) is connected to the second bent pin portion (122), the core pulling sliding member (22) is provided with a core pulling opening (220), the upper and lower sides of the core pulling opening (220) are both trumpet-shaped, the upper side of the core pulling opening (220) is provided with a first upper side inclined surface (221), a second upper side inclined surface ( 222), a first lower side inclined surface (223) and a second lower side inclined surface (224) are provided on the lower side of the core pulling opening (220), the first upper side inclined surface (221) is parallel to the second lower side inclined surface (224), the second upper side inclined surface (222) is parallel to the first lower side inclined surface (223), the inclination of the first bent pin portion (121) is the same as the inclination of the second upper side inclined surface (222), and the inclination of the second bent pin portion (122) is the same as the inclination of the second lower side inclined surface (224).

2. A bending pin double-stroke core-pulling mechanism for a mold according to claim 1, characterized in that: The lateral oblique end surface (225) of the core-pulling sliding member (22) is in relative sliding contact with the inner oblique surface (123) of the bent pin core-pulling member (12), and a wear-resistant plate (23) for sliding contact with the inner oblique surface (123) of the bent pin core-pulling member (12) is embedded in the lateral oblique end surface (225) of the core-pulling sliding member (22).

3. A bending pin double-stroke core pulling mechanism for a mold according to claim 1, characterized in that: The cross sections of the first bent pin portion (121) and the second bent pin portion (122) of the bent pin core-pulling component (12) are both T-shaped.

4. A bending pin double-stroke core-pulling mechanism for a mold according to claim 1, characterized in that: A void cavity (211) is provided at the lower template (21), and the second bent pin portion (122) of the bent pin core-pulling component (12) is located at the void cavity (211) of the lower template (21) when the mold is closed.

5. A bending pin double-stroke core-pulling mechanism for a mold according to claim 4, characterized in that: The upper template (11) is fixedly mounted on the upper mold base (10), the lower template (21) is fixedly mounted on the lower mold base (20), and a needle plate assembly (24) is provided between the lower template (21) and the lower mold base (20).

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