Injection mold rear mold driving slider mechanism and injection mold

Abstract

The utility model relates to the technical field of injection molds, and specifically to a rear mold driving slider mechanism of an injection mold and an injection mold, comprising a slider arranged inside the mold, a slider guide rail being horizontally arranged at the bottom of the slider, a driving rod being arranged through the slider, the driving rod passing through the slider and the slider guide rail in sequence from top to bottom, and the driving rod moving up and down drives the slider to move left and right along the slider guide rail. The utility model adopts the matching design of the driving rod and the slider, and during the ejection process, the driving rod moves upward and the slider moves to one side; compared with the inclined guide column, the design of the rear mold driving slider mechanism successfully reduces the force it receives during the movement of the mold, significantly improves the strength and durability of the driving mechanism, and under the same production conditions, the rear mold driving slider mechanism is less likely to fail or be damaged, greatly extending the service life of the mold and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a rear mold drive slider mechanism and an injection mold. Background Technology

[0002] In the mold design and manufacturing process, ensuring the smooth removal of the product from the mold—that is, demolding—is a crucial step. However, when dealing with products with special structures, the demolding process becomes complex and challenging. These products may incorporate undercut designs; these undercuts are not traditionally horizontal but need to be removed along a specific, downward angle to ensure the product's integrity and prevent damage.

[0003] To address this specific requirement, mold designers typically employ a T-slot steering mechanism to switch between the oblique and horizontal movements of the slider. This mechanism allows the slider to move along a predetermined oblique path when the mold opens, thereby causing the product to exit the mold in the desired undercut ejection direction.

[0004] However, while the T-slot steering mechanism solves the demolding problem for products with special structures to some extent, it also has some significant drawbacks. First, due to the complexity of the structure itself, the positioning accuracy of this steering mechanism is often difficult to guarantee, which may lead to product defects or mold damage during mass production. Second, to achieve oblique movement, sufficient space needs to be reserved inside the mold to accommodate the T-slot and related sliding mechanism, which undoubtedly increases the overall size of the mold and manufacturing cost.

[0005] Furthermore, when the downward slope angle of the structural slider is too large, the force borne by the inclined guide post will also increase significantly. During the repeated opening and closing of the mold, the inclined guide post needs to withstand enormous stress and impact, which greatly increases the risk of its breakage. Once the inclined guide post breaks, it will not only render the mold unusable, but also affect production progress and product quality, thereby reducing production efficiency. Utility Model Content

[0006] To address the risk of breakage of inclined guide pillars during mass production, ensure production efficiency and product quality, and improve the reliability and stability of mold structures, this utility model provides a rear mold drive slider mechanism for injection molds and an injection mold.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: a rear mold drive slider mechanism for injection molds, comprising a slider disposed inside the mold, a slider guide rail horizontally disposed at the bottom of the slider, a drive rod disposed through the slider, the drive rod passing through the slider and the slider guide rail from top to bottom, and the drive rod moving up and down driving the slider to move left and right along the slider guide rail.

[0008] Furthermore, the drive rod includes a vertically arranged straight rod and an inclined rod disposed at the top of the straight rod, and the slider is provided with a slider through hole that matches the inclination angle of the inclined rod.

[0009] Furthermore, the slider through hole includes an upper opening and a lower opening, both of which are right-angled trapezoidal structures, and the inclination angle of the hypotenuse of the right-angled trapezoids of the upper and lower openings is equal to the inclination angle of the tilting rod.

[0010] Furthermore, the slider includes a slider body, an inclined block is provided on one side of the slider body, a pressure block is provided on one side of the inclined block, and the angle between the pressure block and the horizontal plane is equal to the inclination angle of the inclined rod.

[0011] Furthermore, the slider guide rail includes a slider base plate disposed at the bottom of the slider, slider pressure plates disposed on both sides of the slider base plate, and guide rail blocks symmetrically disposed on both sides of the slider body, the size of the guide rail blocks matching the size of the slider pressure plates.

[0012] Furthermore, a slider limiting block is provided at one end of the slider guide rail, and the slider limiting block is located at the top of the rear mold frame.

[0013] Furthermore, an ejection limiting block is arranged around the outside of the drive rod, and the ejection limiting block is located at the top of the mold foot.

[0014] Furthermore, an auxiliary limiting block is provided above the ejection limiting block, and the driving rod passes through the auxiliary limiting block.

[0015] Furthermore, the drive rod is positioned above the ejector plate, and the slider is positioned above the rear mold base.

[0016] An injection mold includes a front mold base, a rear mold base, a base plate, an ejector base plate, an ejector plate, and a rear mold drive slider mechanism as described in any one of the above.

[0017] The beneficial effects achieved by this utility model are as follows:

[0018] 1. This utility model, through the cooperative design of the drive rod and the slider, allows the drive rod to move upward and the slider to move to one side during the ejection process. Compared with the inclined guide post, the design of the rear mold drive slider mechanism successfully reduces the force it experiences during mold movement, significantly improving the strength and durability of the drive mechanism. Under the same production conditions, the rear mold drive slider mechanism is less prone to failure or damage, greatly extending the service life of the mold and reducing maintenance costs. The rear mold drive slider mechanism also has higher strength and is better able to adapt to complex and ever-changing mold movement requirements.

[0019] 2. This utility model optimizes the spatial layout of the mold, making the overall structure of the mold more compact and reasonable, and improving the space utilization rate; while ensuring functionality, it reduces volume and weight, and the processing difficulty is also lower, which helps to reduce the manufacturing cost and cycle of the mold.

[0020] 3. This utility model has an excellent locking and positioning effect, which can ensure that the mold maintains a stable operating state in a high-speed and high-precision production environment, thereby improving the molding quality and production efficiency of the product. Attached Figure Description

[0021] Figure 1 This is a diagram showing the location of the slider mechanism in an injection mold;

[0022] Figure 2 This is a side view of the structure of an injection mold.

[0023] Figure 3 yes Figure 2 AA section diagram;

[0024] Figure 4 This is a diagram showing the positional relationship of the slider mechanism within the injection mold;

[0025] Figure 5 This is a schematic diagram showing the connection between the slider mechanism and the ejector plate;

[0026] Figure 6 This is a schematic diagram of the overall structure of the slider mechanism. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the overall structure of the slider mechanism. Figure 2 ;

[0028] Figure 8 This is a diagram showing the connection between the slider and the slider guide rail;

[0029] Figure 9 This is a schematic diagram of the overall structure of the slider;

[0030] Figure 10 This is a cross-sectional view of the slider;

[0031] Figure 11 This is a schematic diagram of the overall structure of the drive rod;

[0032] Figure 12 This is a partial structural diagram of the slider mechanism in its initial state;

[0033] Figure 13 This is a partial sectional view of the slider mechanism in its initial state;

[0034] Figure 14 This is a diagram showing the positional relationship of the slider mechanism during mold ejection;

[0035] Figure 15 This is a cross-sectional view of the slider mechanism position when the mold is ejected.

[0036] The markings in the diagram are as follows: 1. Slider; 2. Slider guide rail; 3. Slider limit block; 4. Drive rod; 5. Ejection limit block; 6. Auxiliary limit block; 7. Ejector plate; 8. Ejector base plate; 9. Mold foot; 10. Rear mold frame; 11. Base plate; 101. Slider body; 102. Inclined block; 103. Pressure block; 104. Guide rail block; 105. Slider through hole; 201. Slider pressure plate; 202. Slider base plate; 401. Straight rod; 402. Inclined rod. Detailed Implementation

[0037] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a rear mold drive slider mechanism and an injection mold according to this utility model.

[0038] like Figures 1 to 15 As shown, a rear mold drive slider mechanism for injection molds includes a slider 1 disposed inside the mold. A slider guide rail 2 is horizontally disposed at the bottom of the slider 1. The slider 1 can move left and right in the horizontal direction on the slider guide rail 2. A drive rod 4 is disposed through the slider 1. The drive rod 4 passes through the slider 1 and the slider guide rail 2 from top to bottom. When the drive rod 4 moves up and down, it drives the slider 1 to move left and right horizontally along the direction of the slider guide rail 2.

[0039] The drive rod 4 includes a vertically arranged straight rod 401 and an inclined rod 402 connected to the top of the straight rod 401. The straight rod 401 is vertically arranged above the ejector plate 7. The drive rod 4 moves together with the ejector plate 7 to demold the undercut molded product. The angle of inclination of the inclined rod 402 matches the angle of the undercut mold. An ejection limit block 5 is provided on the outer side of the lower part of the straight rod 401 of the inclined rod 402. The ejection limit block 5 is fixedly arranged on the top of the foot mold. The ejection limit block 5 can restrict the vertical movement of the drive rod 4 and can limit the maximum displacement of the ejector plate 7 and the ejector base plate 8. An auxiliary limiting block 6 is provided above the ejection limiting block 5. The auxiliary limiting block 6 is located outside the straight rod 401 at the bottom of the drive rod 4. The auxiliary limiting block 6 is located above the rear mold base 10 and at the bottom of the slider guide rail 2. The auxiliary limiting block 6 assists the ejection limiting block 5 in further restricting the movement direction of the drive rod 4, ensuring that the drive rod 4 can only move in the vertical direction.

[0040] The slider 1 includes a slider body 101. An inclined block 102 is provided on the side of the slider body 101 away from the edge of the rear mold frame 10. The inclined block 102 is inclined at an angle greater than 3°. A pressure block 103 is provided on the other side of the inclined block 102. The upper and lower sides of the pressure block 103 are inclined at equal angles and have the same angle with the horizontal plane. A slider through hole 105 is provided inside the slider body 101. The shape of the slider through hole 105 matches the shape of the drive rod 4. The slider through hole 105 includes an upper opening and a lower opening. Both the upper and lower openings are right-angled trapezoidal structures. The inclination angle of the hypotenuse of the right-angled trapezoids of the upper and lower openings is equal to the inclination angle of the inclined rod 402. The angle between the pressure block 103 and the horizontal plane is equal to the inclination angle of the inclined rod 402 in the drive rod 4.

[0041] The slider guide rail 2 includes a slider base plate 202 disposed at the bottom of the slider 1. The slider base plate 202 is horizontally positioned and has a through hole. The drive rod 4 passes through the through hole in the slider base plate 202. Slider pressure plates 201 are disposed on the upper sides of both sides of the slider base plate 202, forming a groove between the slider pressure plates 201 and the slider base plate 202. Guide rail blocks 104 are disposed on both sides of the bottom of the slider body 101. The shape of the guide rail blocks 104 matches the shape of the groove formed between the slider pressure plates 201 and the slider base plate 202. The slider 1 can move horizontally left and right along the slider guide rail 2. A slider limiting block 3 is disposed on one side of the slider guide rail 2. The slider limiting block 3 is disposed on one side of the rear mold frame 10. The slider limiting block 3 can limit the maximum movement distance of the slider 1 and prevent the slider 1 from disengaging from the slider guide rail 2.

[0042] An injection mold includes a base plate 11, foot molds, ejector base plate 8, ejector panel 7, rear mold base 10, front mold base, and rear mold drive mechanism. The rear mold drive mechanism is located inside the injection mold. The foot mold is located above the base plate 11. The ejector base plate 8 and ejector panel 7 are arranged sequentially from bottom to top in the middle of the foot mold. The rear mold base 10 and front mold base are arranged sequentially above the mold feet 9.

[0043] When the molded product is ejected, the ejector plate 7 and the ejector base plate 8 move upward simultaneously. The drive rod 4 located on the ejector plate 7 also moves upward. When the drive rod 4 moves upward, the upper inclined surface of the upper inclined rod 402 of the drive rod 4 provides a thrust perpendicular to the inclined surface to the slider 1. The upward thrust is decomposed into a vertically upward force pushing the slider 1 and a horizontal force pushing the slider 1. The vertical force pushing the slider 1 is canceled out by the slider guide rail 2, and the horizontal force pushing the slider 1 pushes the slider 1 to translate along the direction of the slider guide rail 2. During the ejection process, the molded product remains relatively stationary with respect to the ejector plate 7. Under the thrust of the drive rod 4, the slider 1 moves diagonally downward relative to the molded product along the inclined surface of the drive rod 4 to disengage the undercut. The slider 1 stops moving at the slider limit block 3. The ejector plate 7 and the ejector base plate 8 continue to move upward. After the ejector plate 7 touches the ejection limit block 5, it stops moving upward. The ejection action structure completes the undercut demolding of the molded product.

[0044] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A rear mold driving slider mechanism for an injection mold, characterized in that: The invention comprises a slider (1) arranged inside a mold, a slider guide rail (2) being arranged horizontally at the bottom of the slider (1), a driving rod (4) being arranged through the slider (1), the driving rod (4) passing through the slider (1) and the slider guide rail (2) in sequence from top to bottom, and the driving rod (4) moving up and down drives the slider (1) to move left and right along the slider guide rail (2).

2. The injection mold rear mold driving slider mechanism according to claim 1, characterized in that: The driving rod (4) comprises a vertically arranged straight rod (401) and an inclined rod (402) arranged on the top of the straight rod (401), and a slider through hole (105) matching the inclination angle of the inclined rod (402) is arranged in the slider (1).

3. The injection mold rear mold driving slider mechanism according to claim 2, characterized in that: The slider through hole (105) comprises an upper opening and a lower opening, both of which are right-angled trapezoidal structures, and the inclination angles of the right-angled trapezoidal hypotenuses of the upper opening and the lower opening are equal to the inclination angle of the inclination rod (402).

4. The injection mold rear mold driving slider mechanism according to claim 3, characterized in that: The slider (1) comprises a slider body (101), a tilting block (102) is arranged on one side of the slider body (101), a pressing block (103) is arranged on one side of the tilting block (102), and the angle between the pressing block (103) and the horizontal plane is equal to the tilting angle of the tilting rod (402).

5. The injection mold rear mold driving slider mechanism according to claim 4, characterized in that: The slider guide rail (2) comprises a slider base plate (202) arranged at the bottom of the slider (1), slider pressure plates (201) are arranged on both sides of the slider base plate (202), and guide rail blocks (104) are symmetrically arranged on both sides of the slider body (101), and the size of the guide rail blocks (104) matches the size of the slider pressure plates (201).

6. The injection mold rear mold driving slider mechanism according to claim 1, characterized in that: A slider limit block (3) is provided at one end of the slider guide rail (2), and the slider limit block (3) is arranged on the top of the rear mold frame (10).

7. The injection mold rear mold driving slider mechanism according to claim 1, characterized in that: An ejection limit block (5) is arranged around the outer side of the driving rod (4), and the ejection limit block (5) is arranged on the top of the mold foot (9).

8. The injection mold rear mold driving slider mechanism according to claim 7, characterized in that: An auxiliary limit block (6) is arranged above the ejection limit block (5), and the driving rod (4) passes through the auxiliary limit block (6).

9. The injection mold rear mold driving slider mechanism according to claim 1, characterized in that: The driving rod (4) is arranged above the ejector panel (7), and the sliding block (1) is arranged above the rear mold frame (10).

10. An injection mold, characterized in that: The invention comprises a front mold frame, a rear mold frame (10), a bottom plate (11), an ejector bottom plate (8), an ejector panel (7) and an injection mold rear mold driving slider mechanism according to any one of claims 1 to 9.

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