Delayed core-pulling mechanism for injection mold

Abstract

The delayed core-pulling mechanism comprises a shoveling machine, a mold core, a core-pulling sliding rod and a sliding block, the mold core, the core-pulling sliding rod and the sliding block jointly form a mold cavity of a cylindrical product, one end, far away from the mold core, of the sliding block is connected with a main sliding seat, an auxiliary sliding seat is matched with the main sliding seat in a sliding mode, the core-pulling sliding rod is matched with the sliding block in a sliding mode, and the auxiliary sliding seat is connected with the shoveling machine. The end, away from the mold core, of the core-pulling sliding rod is connected with the auxiliary sliding seat, and an inclined guide column is arranged on the shoveling machine and is in sliding fit with the main sliding seat and the auxiliary sliding seat; by means of the mode, core pulling can be carried out in a staged mode when core pulling is carried out on a product, and damage to the product caused by synchronous core pulling is avoided.

Description

Technical Field

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

[0002] When the injection mold is larger than the cylindrical product, after injection molding is completed, a core pulling action is required, that is, the core pulling slide rod and the slider are driven by a shovel to move away from the inside and the end of the cylindrical product. However, if the shovel drives the core pulling slide rod and the slider to move at the same time, the friction with the cylindrical product is too large, causing damage to the product and affecting the product yield. Utility Model Content

[0003] The main technical problem solved by the utility model is to provide a delayed core pulling mechanism for an injection mold, which can perform core pulling in stages when pulling the core of a product, thereby avoiding damage to the product caused by synchronous core pulling.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a delayed core-pulling mechanism for an injection mold, including: a shovel, a mold core, a core-pulling slide and a slider. The mold core, the core-pulling slide and the slider together form a mold cavity for a cylindrical product. The end of the slider away from the mold core is connected to a main slide, and a secondary slide is slidably fitted on the main slide. The core-pulling slide is slidably fitted with the slider, and the end of the core-pulling slide away from the mold core is connected to the secondary slide. An inclined guide column is provided on the shovel, and the inclined guide column is slidably fitted with the main slide and the secondary slide.

[0005] Preferably, a main oblique guide hole cooperating with the oblique guide column is provided on the main slide, and an auxiliary oblique guide hole cooperating with the oblique guide column is provided on the auxiliary slide, and the diameter of the auxiliary oblique guide hole is smaller than that of the main oblique guide hole.

[0006] Preferably, a limit pin is provided on the shovel, and a limit hole matching the limit pin is opened on the main slide. The limit pin is used to limit the movement of the main slide when the mold is just opened, so that the position of the main slide remains stationary when the mold is just opened.

[0007] Preferably, a limit block is provided on the main slide, and a limit slot is provided on the auxiliary slide, and the limit block is used to limit the sliding range of the auxiliary slide on the main slide.

[0008] Preferably, a lower wear-resistant plate is provided on the lower side of the main slide, a ball plunger is provided on the lower wear-resistant plate, and a positioning slot that cooperates with the ball plunger is provided on the main slide.

[0009] Preferably, the positioning slot includes a first positioning slot and a second positioning slot, and the first positioning slot and the second positioning slot are respectively distributed at positions of the minimum sliding range and the maximum sliding range of the main slide relative to the lower wear-resistant plate.

[0010] Preferably, a clamping groove is provided on the auxiliary slide, and a clamping joint is provided on the end of the core-pulling slide away from the mold core, and the clamping joint is engaged with the clamping groove.

[0011] The beneficial effect of the present invention is that the auxiliary slide and the main slide slide asynchronously, that is, when the mold is opened, the auxiliary slide slides first, driving the core-pulling slide rod to gradually separate from the cylindrical product. At this time, the slider still provides support and protection for one end of the product and prevents the product from sliding. Then the main slide slides, thereby driving the slider to separate from the mold core. Because the core-pulling slide rod has been separated from the product, the sliding of the slider at this time will not drive the product to slide, so that the product is stably in the mold core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model when the mold is closed;

[0013] Figure 2 It is a structural schematic diagram of the utility model when the mold is opened;

[0014] Figure 3 It is a partial cross-sectional view of the utility model when the mold is closed;

[0015] Figure 4 This is a partial cross-sectional view of the utility model when the mold is just opened;

[0016] Figure 5 It is a partial cross-sectional view of the utility model when the mold is opened.

[0017] The markings of the components in the accompanying drawings are as follows:

[0018] 1. Shovel; 11. Inclined guide post; 12. Limit pin;

[0019] 2. Moulding

[0020] 3. Core pulling slide;

[0021] 4. Slider;

[0022] 5. Main slide; 51. Main oblique guide hole; 52. Limit hole; 53. Limit block; 54. First positioning slot;

[0023] 55. Second positioning slot;

[0024] 6. Auxiliary slide; 61. Auxiliary oblique guide hole; 62. Limiting groove; 63. Clamping groove;

[0025] 7. Lower wear plate; 71. Ball plunger;

[0026] 8. Product. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) basic units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0034] Example:

[0035] A delayed core-pulling mechanism for an injection mold comprises: a shovel 1, a mold core 2, a core-pulling slide 3 and a slider 4. The mold core 2, the core-pulling slide 3 and the slider 4 together form a mold cavity for a cylindrical product 8. The end of the slider 4 away from the mold core 2 is bolted to a main slide 5. The main slide 5 is slidably fitted with a secondary slide 6. The core-pulling slide 3 slides with the slider 4. The end of the core-pulling slide 3 away from the mold core 2 is connected to the secondary slide 6. An inclined guide post 11 is installed on the shovel 1. The inclined guide post 11 slides with the main slide 5 and the secondary slide 6. A main inclined guide hole 51 is provided on the main slide 5 to cooperate with the inclined guide post 11. A secondary inclined guide hole 61 is provided on the secondary slide 6 to cooperate with the inclined guide post 11. The diameter of the secondary inclined guide hole 61 is smaller than that of the main inclined guide hole 51. Therefore, when the front template drives the shovel machine 1 to move upward when the mold is opened, because the diameter of the secondary inclined guide hole 61 is smaller than that of the main inclined guide hole 51, the inclined guide column 11 first contacts the secondary slide 6 and pushes the secondary slide 6 to move away from the mold core 2, so that the secondary slide 6 drives the core pulling slide rod 3 to first leave the interior of the tubular product 8. At this time, the position of the slider 4 remains unchanged, that is, the slider 4 is providing support and protection for the end face of the tubular product 8. As the shovel machine 1 continues to move upward, the inclined guide column 11 begins to contact the main inclined guide hole 51 of the main slide 5 and forces the main slide 5 to move with the slider 4 away from the mold core 2, thereby completing the core pulling. By dividing the original one-step core pulling into two steps, the slider 4 provides protection for one end of the tubular product 8 while moving the core pulling slide 3, thereby avoiding the problem of the product 8 moving with the slider 4 during core pulling. When the slider 4 starts to move, the force of the core pulling slide 3 on the tubular product 8 is reduced, so when the slider 4 moves away from the mold core 2, the product 8 will not move with the slider 4, thereby avoiding damage to the product 8 during the core pulling process.

[0036] A limit pin 12 is installed on the shovel 1, and a limit hole 52 that cooperates with the limit pin 12 is opened on the main slide 5. The limit pin 12 is used to limit the movement of the main slide 5 when the mold is just opened, so that the position of the main slide 5 remains stationary when the mold is just opened. The position of the main slide 5 is fixed by the limit pin 12, avoiding the problem of the main slide 5 moving due to the friction between the sub-slide 6 and the main slide 5 when the inclined guide column 11 pushes the sub-slide 6. By controlling the length of the limit pin 12, the main slide 5 can remain stationary only when the mold is just opened.

[0037] The main slide 5 is screwed with a limit block 53, and the auxiliary slide 6 is provided with a limit slot 62. The limit block 53 is used to limit the sliding range of the auxiliary slide 6 on the main slide 5, thereby controlling the sliding range of the auxiliary slide 6 relative to the main slide 5.

[0038] A lower wear-resistant plate 7 is placed on the lower side of the main slide 5, and the lower wear-resistant plate 7 is fixed on the lower template. The main slide 5 slides with the lower template, and a ball plunger 71 is installed on the lower wear-resistant plate 7. The main slide 5 is provided with a positioning slot that cooperates with the ball plunger 71. The positioning slot includes a first positioning slot 54 and a second positioning slot 55. The first positioning slot 54 and the second positioning slot 55 are respectively distributed at the positions of the main slide 5 relative to the minimum sliding range and the maximum sliding range of the lower wear-resistant plate 7, so that when the main slide 5 slides into place, the main slide 5 is flexibly positioned by the ball plunger 71.

[0039] A snap-fit ​​groove 63 is provided on the auxiliary slide 6, and a snap joint is provided at the end of the core-pulling slide 3 away from the mold core 2. The snap joint is engaged with the snap-fit ​​groove 63. The snap joint can be a T-shaped snap joint, and the snap groove 63 can be a T-shaped snap groove 63, which facilitates the assembly of the core-pulling slide 3 and the auxiliary slide 6.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A delayed core pulling mechanism for an injection mold, characterized in that: include: A shovel machine (1), a mold core (2), a core-pulling slide (3) and a slider (4), wherein the mold core (2), the core-pulling slide (3) and the slider (4) together form a mold cavity of a cylindrical product (8), the slider (4) is connected to a main slide (5) at one end away from the mold core (2), and a sub-slide (6) is slidably fitted on the main slide (5), the core-pulling slide (3) is slidably fitted with the slider (4), and the core-pulling slide (3) is connected to the sub-slide (6) at one end away from the mold core (2), and an inclined guide column (11) is provided on the shovel machine (1), and the inclined guide column (11) is slidably fitted with the main slide (5) and the sub-slide (6).

2. A delayed core-pulling mechanism for an injection mold according to claim 1, characterized in that: The main slide (5) is provided with a main oblique guide hole (51) matched with the oblique guide column (11), and the auxiliary slide (6) is provided with an auxiliary oblique guide hole (61) matched with the oblique guide column (11), and the diameter of the auxiliary oblique guide hole (61) is smaller than the diameter of the main oblique guide hole (51).

3. A delayed core-pulling mechanism for an injection mold according to claim 1 or 2, characterized in that: The shovel machine (1) is provided with a limit pin (12), and the main slide (5) is provided with a limit hole (52) that matches the limit pin (12). The limit pin (12) is used to limit the movement of the main slide (5) when the mold is just opened, so that the position of the main slide (5) remains stationary when the mold is just opened.

4. The delayed core-pulling mechanism for an injection mold according to claim 1, characterized in that: A limiting block (53) is provided on the main slide (5), and a limiting groove (62) is provided on the auxiliary slide (6). The limiting block (53) is used to limit the sliding range of the auxiliary slide (6) on the main slide (5).

5. The delayed core-pulling mechanism for an injection mold according to claim 1, characterized in that: A lower wear-resistant plate (7) is provided on the lower side of the main slide (5), a ball plunger (71) is provided on the lower wear-resistant plate (7), and a positioning slot matched with the ball plunger (71) is provided on the main slide (5).

6. The delayed core-pulling mechanism for an injection mold according to claim 5, characterized in that: The positioning slots comprise a first positioning slot (54) and a second positioning slot (55), wherein the first positioning slot (54) and the second positioning slot (55) are respectively distributed at positions of the minimum sliding range and the maximum sliding range of the main slide seat (5) relative to the lower wear-resistant plate (7).

7. The delayed core-pulling mechanism for an injection mold according to claim 1, characterized in that: A snap-fit ​​groove (63) is provided on the auxiliary slide (6), and a snap-fit ​​joint is provided on one end of the core-pulling slide (3) away from the mold core (2), and the snap-fit ​​joint is snap-fitted with the snap-fit ​​groove (63).

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