Anti-inverted mold narrow area blind insert thimble

Abstract

The utility model discloses a mould narrow area blind insert thimble of anti -inverted buckle, including mould, the inside symmetry of mould is close to two side positions and is equipped with mounting hole A and mounting hole B, is equipped with the top rod sleeve A and top rod sleeve B respectively in the inside portion of mounting hole A and mounting hole B, the top portion of top rod sleeve A and top rod sleeve B is respectively in close contact to the limiting surface A and limiting surface B of mounting hole A and mounting hole B end surface equipped, to realize the end surface location fixed of top rod sleeve A and top rod sleeve B after installation, avoid the inverted buckle when product ejection. The utility model through limiting surface A, limiting surface B and positioning groove A, positioning groove B double positioning structure of stop face, realize the steady fixed of top rod sleeve A, top rod sleeve B from end surface and bottom two dimensions, effectively adapt the blind insert installation demand of mould narrow area, avoid the inverted buckle phenomenon when product ejection, significantly improve product processing quality and mould service life.

Description

Technical Field

[0001] This utility model relates to the field of mold processing and application technology, and in particular to a blind insert ejector pin sleeve for narrow areas of a mold to prevent undercutting. Background Technology

[0002] Stability directly affects the product molding quality and mold life. Especially when blind inserting ejector sleeves in narrow areas of the mold, the traditional ejector sleeve structure lacks targeted positioning and limiting design, making it difficult to accurately control the position of the ejector sleeve during installation. This can easily lead to problems such as installation offset and insufficient coaxiality, which can cause hidden dangers for subsequent product processing.

[0003] In the current ejector sleeve stage, due to the lack of an effective anti-backlash constraint structure, when the ejector pin drives the ejector sleeve to perform the demolding action, the ejector sleeve is easily affected by the stress of the product after molding or the internal friction of the mold, resulting in reverse displacement or jamming, i.e., backlash problem. This problem not only causes scratches and deformation on the product surface, but also, in severe cases, damages the ejector sleeve and causes mold jamming, increasing mold maintenance costs and production downtime, making it difficult to meet the requirements of efficient and high-precision mold processing. Therefore, this utility model proposes an anti-backlash blind-inserted ejector sleeve for narrow areas of the mold. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a blind-mounted ejector sleeve for narrow areas of a mold to prevent undercutting, thereby improving the stability of the ejector sleeve during installation in narrow areas, preventing undercutting when the product is ejected from the mold, and ensuring processing accuracy and efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a blind insert ejector pin sleeve for narrow areas of a mold to prevent undercutting is provided, including a mold core, wherein mounting holes A and B are symmetrically opened on both sides of the interior of the mold core, and ejector pin sleeve A and ejector pin sleeve B are respectively installed inside the mounting holes A and B; The tops of the ejector sleeve A and ejector sleeve B are respectively pressed against the limiting surfaces A and B provided on the end faces of the mounting holes A and B, so as to limit and fix the end faces of the ejector sleeve A and ejector sleeve B after installation, and prevent the product from being snapped under when it is demolded.

[0006] The present invention is further configured such that: the bottom of the mounting hole A and the mounting hole B are respectively provided with a positioning groove A and a positioning groove B, and the inner arc wall of the positioning groove A and the positioning groove B are respectively provided with a stop surface, and the two stop surfaces are perpendicular to each other.

[0007] The above technical solution utilizes the vertical stop surfaces of the inner arc walls of the positioning groove A at the bottom of mounting hole A and the positioning groove B at the bottom of mounting hole B to construct a bidirectional orthogonal limiting structure. This structure restricts the rotation and translation of the top rod sleeve A and the top rod sleeve B from two vertical dimensions in the horizontal direction, providing a precise bottom positioning reference for the blind installation of the top rod sleeve in narrow areas. This solves the problems of fuzzy positioning and easy displacement in traditional blind installation operations, ensuring the positional accuracy of the top rod sleeve after installation.

[0008] The present invention is further configured such that: the bottom of the top rod sleeve A and the top rod sleeve B are respectively fixedly connected to positioning block A and positioning block B, and the positioning block A and positioning block B are respectively tightly installed in positioning groove A and positioning groove B through stop surfaces.

[0009] Through the above technical solution, the positioning block A of ejector sleeve A and the positioning block B of ejector sleeve B are tightly fitted with the stop surfaces of positioning grooves A and B, respectively. The friction generated by surface contact enhances the connection stability between the ejector sleeve and the mold core. Simultaneously, the matching structure of the positioning blocks and grooves directly ensures the coaxiality of ejector sleeves A and B with mounting holes A and B, preventing uneven stress on the ejector sleeves due to installation deviations and reducing the risk of undercut during product demolding from a structural perspective.

[0010] The present invention is further configured such that: a guide groove A is provided at the top of the top of the push rod sleeve A near the inner wall, and the inner wall of the guide groove A is arc-shaped; the guide groove A has an opening at the top of the push rod sleeve A, and the opening is connected to the groove opened at the top of the mold core.

[0011] Through the above technical solution, the flow guide groove A on the arc-shaped inner wall can reduce the flow resistance of coolant or release agent in the groove during mold processing, and avoid local pressure differences caused by fluid stagnation. At the same time, the design of the top opening of the flow guide groove A and the groove on the top of the mold core creates a basic channel for fluid flow, ensuring that the fluid can be accurately delivered to the mating area between the ejector sleeve A and the mold, providing lubrication and heat dissipation support for the smooth movement of the ejector sleeve.

[0012] The present invention is further configured such that: a guide groove B is provided on the top of the top rod sleeve B at the inner wall position, and the guide groove B is arranged in an annular arc shape; the guide groove B has two openings on the top of the top rod sleeve B, and the openings are connected to the groove opened on the top of the mold core.

[0013] Through the above technical solution, the annular arc-shaped guide groove B can achieve annular distribution of fluid on the inner wall of the ejector sleeve B. Combined with the openings of the two grooves connecting the top of the mold core, a bidirectional fluid input path is formed, expanding the fluid coverage area. This design ensures uniform lubrication of the mating surfaces of the ejector sleeve B and the mounting hole B, and quickly dissipates localized heat generated during mold processing, preventing thermal deformation of the ejector sleeve due to excessive temperature, further improving the stability of the ejector sleeve's movement.

[0014] The present invention is further configured such that the guide groove A and the guide groove B are connected by a groove opened on the top of the mold core.

[0015] The above technical solution connects guide channels A and B in series via a groove on the top of the mold core, forming a complete fluid circulation loop. This loop allows for bidirectional flow of coolant or release agent between the two ejector sleeves, ensuring uniform fluid distribution within narrow areas of the mold and preventing functional failure due to localized blockage of a single guide channel. Simultaneously, the circulating fluid more efficiently performs heat dissipation and lubrication tasks, reducing frictional resistance between the ejector sleeve and the mold, and lowering the probability of undercutting.

[0016] The beneficial effects of this utility model are as follows: 1. The present invention proposes a blind insert ejector sleeve for narrow areas of molds to prevent undercutting. Through the dual positioning structure of limiting surface A and limiting surface B and positioning groove A and positioning groove B stop surfaces, the ejector sleeve A and ejector sleeve B are firmly fixed from both the end face and the bottom. This effectively meets the blind insert installation requirements in narrow areas of molds, avoids undercutting when the product is demolded, and significantly improves the product processing quality and mold service life. 2. The anti-backlash mold narrow area blind insert ejector sleeve proposed in this utility model has a highly efficient fluid circulation system through the connection design of the guide groove A, guide groove B and the top groove of the mold core, which optimizes the heat dissipation and lubrication effect inside the mold, reduces the movement resistance of the ejector sleeve, and at the same time reduces the difficulty of installation and operation in narrow areas and improves the mold processing efficiency. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a blind-mounted ejector pin sleeve for a narrow area of ​​a mold to prevent undercutting, according to this utility model. Figure 2 This is a first structural diagram of the mold core of a blind-inserted ejector pin sleeve in a narrow area of ​​a mold according to the present invention for preventing undercutting; Figure 3 This is a second structural diagram of the mold core of a blind-inserted ejector pin sleeve in a narrow area of ​​a mold according to the present invention; Figure 4 This is a cross-sectional view of the mold core in a narrow area blind-inserted ejector pin sleeve for anti-overturning mold according to the present invention; Figure 5This is a cross-sectional view of the mold core in a narrow area blind-inserted ejector pin sleeve for anti-overturning mold according to the present invention; Figure 6 This is a structural diagram of the ejector pin sleeve A in a narrow area of ​​a mold for preventing undercutting, according to this utility model. Figure 7 This is a structural diagram of the ejector pin sleeve B in a narrow area blind insert ejector pin sleeve for anti-overturning mold according to this utility model.

[0018] In the diagram: 1. Mold core; 11. Mounting hole A; 111. Positioning groove A; 112. Limiting surface A; 12. Mounting hole B; 121. Positioning groove B; 122. Limiting surface B; 2. Ejector sleeve A; 21. Positioning block A; 22. Guide groove A; 3. Ejector sleeve B; 31. Positioning block B; 32. Guide groove B. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] like Figures 1-5 As shown, a blind insert ejector pin sleeve for narrow areas of a mold to prevent undercutting includes a mold core 1. The mold core 1 has symmetrical mounting holes A11 and B12 near the two sides. Ejector pin sleeve A2 and ejector pin sleeve B3 are respectively installed inside the mounting holes A11 and B12. The bottoms of mounting holes A11 and B12 are respectively provided with connecting positioning grooves A111 and B121. The inner arc walls of positioning grooves A111 and B121 are respectively provided with stop surfaces, and the two stop surfaces are perpendicular to each other. By utilizing the vertical stop surfaces of the inner arc walls of positioning groove A111 at the bottom of mounting hole A11 and positioning groove B121 at the bottom of mounting hole B12, a bidirectional orthogonal limiting structure is constructed. This structure can restrict the rotation and translation of top rod sleeves A2 and B3 from two vertical dimensions in the horizontal direction, providing a precise bottom positioning reference for blind mounting of top rod sleeves in narrow areas. This solves the problems of fuzzy positioning and easy displacement in traditional blind mounting operations, ensuring the positional accuracy of the top rod sleeves after installation. Positioning blocks A21 and B31 are fixedly connected to the bottom of ejector sleeves A2 and B3, respectively. Positioning blocks A21 and B31 are tightly installed in positioning grooves A111 and B121 via stop surfaces. This ensures a tight fit between the positioning blocks A21 of ejector sleeve A2 and B31 of ejector sleeve B3 and the stop surfaces of positioning grooves A111 and B121, respectively. The friction generated by this surface contact enhances the connection stability between the ejector sleeve and mold core 1. Simultaneously, the matching structure of the positioning blocks and grooves directly ensures the coaxiality of ejector sleeves A2 and B3 with mounting holes A11 and B12, preventing uneven stress on the ejector sleeves due to installation deviations and reducing the risk of undercut during product demolding from a structural perspective.

[0021] like Figure 4 , Figure 6 and Figure 7 As shown, the tops of ejector sleeve A2 and ejector sleeve B3 abut against the limiting surfaces A112 and B122 on the end faces of mounting holes A11 and B12, respectively, to limit and fix the end faces of ejector sleeve A2 and ejector sleeve B3 after installation, and prevent the product from being snapped under when it is demolded. A flow guide groove A22 is provided on the top of the ejector sleeve A2 near the inner wall, and the inner wall of the flow guide groove A22 is arc-shaped. The flow guide groove A22 has an opening on the top of the ejector sleeve A2, and the opening is connected to the groove on the top of the mold core 1. The flow guide groove A22 with an arc-shaped inner wall can reduce the flow resistance of coolant or release agent in the groove during mold processing, and avoid local pressure difference caused by fluid stagnation. At the same time, the connection between the top opening of the flow guide groove A22 and the top groove of the mold core 1 creates a basic channel for fluid flow, ensuring that the fluid can be accurately delivered to the mating area between the ejector sleeve A2 and the mold, providing lubrication and heat dissipation support for the smooth movement of the ejector sleeve. The top of the ejector sleeve B3 has a flow guide groove B32 located on its inner wall. The flow guide groove B32 is annular and arc-shaped. The flow guide groove B32 has two openings at the top of the ejector sleeve B3, which connect to the groove at the top of the mold core 1. The annular arc-shaped flow guide groove B32 allows for a ring-shaped distribution of fluid on the inner wall of the ejector sleeve B3. Combined with the two openings connecting to the groove at the top of the mold core 1, this forms a bidirectional fluid input path, expanding the fluid coverage area. This design ensures uniform lubrication between the ejector sleeve B3 and the mounting hole B12, and quickly dissipates localized heat generated during mold processing, preventing thermal deformation of the ejector sleeve due to excessive temperature, and further improving the stability of the ejector sleeve's movement. The guide channels A22 and B32 are connected by a groove on the top of the mold core 1, forming a complete fluid circulation loop. This loop allows for bidirectional flow of coolant or release agent between the two ejector sleeves, ensuring uniform fluid distribution within the narrow areas of the mold and preventing functional failure due to localized blockage of a single guide channel. Simultaneously, the circulating fluid more efficiently performs heat dissipation and lubrication tasks, reducing frictional resistance between the ejector sleeves and the mold, and lowering the probability of undercutting.

[0022] In use, the coolant or release agent enters the guide grooves A22 and B32 through the grooves at the top of the mold core 1, and circulates in the connected loop. On the one hand, the fluid can carry away the heat in the area where the ejector sleeve and the mold meet, preventing the parts from deforming due to high temperature. On the other hand, the fluid can form a lubricating layer on the inner wall of the ejector sleeve, reducing the frictional resistance during the movement of the ejector rod. When the product is molded and demolded, the ejector rod drives the ejector sleeve to perform the demolding action. Due to the constraint of the double positioning structure, the ejector sleeve will not experience reverse displacement or jamming, effectively avoiding the problem of undercutting and ensuring smooth demolding of the product and stable operation of the mold.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A blind-mounted ejector pin sleeve for narrow areas of a mold to prevent undercutting, comprising a mold core (1), characterized in that: The mold core (1) has symmetrical mounting holes A (11) and B (12) near the two sides inside. The push rod sleeve A (2) and push rod sleeve B (3) are respectively installed inside the mounting holes A (11) and B (12). The tops of the ejector sleeve A (2) and ejector sleeve B (3) are respectively pressed against the limiting surfaces A (112) and B (122) on the end faces of the mounting holes A (11) and B (122) to limit and fix the end faces of the ejector sleeve A (2) and ejector sleeve B (3) after installation, so as to avoid the product being snapped when it is demolded.

2. The anti-backlash mold narrow area blind insert ejector pin sleeve according to claim 1, characterized in that: The bottom of the mounting hole A (11) and the mounting hole B (12) are respectively provided with positioning groove A (111) and positioning groove B (121), and the inner arc wall of the positioning groove A (111) and the positioning groove B (121) are respectively provided with a stop surface, and the two stop surfaces are perpendicular to each other.

3. The anti-backlash mold narrow area blind insert ejector pin sleeve according to claim 2, characterized in that: The bottom of the top rod sleeve A (2) and the top rod sleeve B (3) are respectively fixedly connected to the positioning block A (21) and the positioning block B (31), and the positioning block A (21) and the positioning block B (31) are respectively tightly installed in the positioning groove A (111) and the positioning groove B (121) through the stop surface.

4. A blind-mounted ejector pin sleeve for narrow areas of a mold to prevent undercutting, as described in claim 3, is characterized in that: The top of the top rod sleeve A (2) is provided with a guide groove A (22) near the inner wall, and the inner wall of the guide groove A (22) is arc-shaped. The guide groove A (22) is provided with an opening at the top of the top rod sleeve A (2), and the opening is connected to the groove opened at the top of the mold core (1).

5. A blind-mounted ejector pin sleeve for narrow areas of a mold to prevent undercutting, as described in claim 4, characterized in that: The top of the top rod sleeve B (3) is provided with a guide groove B (32) on the inner wall, and the guide groove B (32) is annular arc. The guide groove B (32) has two openings on the top of the top rod sleeve B (3), and the openings are connected to the grooves opened on the top of the mold core (1).

6. A blind-mounted ejector pin sleeve for narrow areas of a mold to prevent undercutting, as described in claim 5, characterized in that: The guide channel A (22) and guide channel B (32) are connected by a groove opened on the top of the mold core (1).

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