Secondary ejection mechanism of plastic mould

Abstract

The utility model discloses a secondary ejection mechanism of a plastic mould, which comprises a moving component and a fixed component which are arranged beside a moving mould at the bottom of the plastic mould and are clamped with each other. Through the limiting boss, the first-time ejection mechanism comprising the second moving plate and the guide push block achieves first-time ejection and precise limiting of a product, the ejection stroke precision of the product can be precisely controlled, and the situation that ejection is over-limited or the stroke is insufficient is prevented; and secondary ejection of the product is realized with the assistance of a secondary ejection mechanism comprising a moving plate I and a moving plate, so that secondary ejection of the product is completed. According to the secondary ejection mechanism, the number of structural components is small, friction is small, operation and control are easy and convenient, the producible range of products is enlarged, the service life of the mold is prolonged, and the problem that when a plastic mold of a complex part structure is used for demolding of the products, the ejection stroke control precision is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molds, in particular to a secondary ejection mechanism for a plastic mold. Background Art

[0002] Due to the complexity of plastic mold products, in order to ensure that the product can be smoothly removed after injection molding to complete production, the plastic mold will use a secondary ejection method to remove the product, so that the product can be smoothly ejected or automatically dropped, thereby reducing manual removal, shortening the product trial mold time and improving production efficiency;

[0003] At present, there are various secondary ejectors of plastic molds on the market, but they can be roughly divided into two types. The first type mainly changes the structure of the KO insert in the plastic mold so that the structure can be ejected twice, and it is also necessary to add a set of ejector panels and ejector bottom plates to assist the secondary ejection. The second type mainly adds a secondary ejection structure between the ejector plate and the mold B plate, so that the ejector plate and the B plate can form a secondary ejection. The first type has a complex structure and too many parts, which makes its processing requirements higher and the difficulty of mold assembly is significantly increased. Although the second type has the characteristics of simple structure compared with the first type, the stroke accuracy of the secondary ejection is poor, and it is impossible to complete accurate product demolding and blanking. Utility Model Content

[0004] The utility model aims to provide a secondary ejection mechanism for a plastic mold, so as to solve the problem of poor ejection stroke control accuracy when a plastic mold with a complex part structure is demoulded.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a secondary top mechanism of a plastic mold, comprising a moving component and a fixed component arranged beside the movable mold at the bottom of the plastic mold, the moving component and the fixed component are clamped together, the fixed component comprises a fixed base plate and a top plate, the top plate is plugged into the fixed base plate and the ends are aligned; the moving component comprises a moving plate 1 and a moving plate 2 which are connected with each other, the moving plate 2 is symmetrically provided with a guide push block on one side corresponding to the fixed base plate, and a movable plate matching the gap of the guide push block is installed on the outer side of the lower end of the moving plate 1; the fixed base plate is provided with symmetrically distributed limiting bosses on the inner side close to the moving plate 2, and an extrusion block is embedded in the middle of the moving plate 2 through the installation cavity.

[0006] Among them, a guide groove for moving the moving component is opened in the middle of the inner side of the fixed base plate, and a second card slot is opened on both sides of the extrusion block corresponding to the guide groove of the fixed base plate, and a protrusion that is engaged with the second card slot is commonly arranged between the fixed base plate and the movable plate.

[0007] Wherein, a card slot matching with the protrusion is opened on both sides of the movable plate, the height of the protrusion is higher than the height of the movable plate, and both side ends of the protrusion are semicircular.

[0008] The bottom of the extrusion block is provided with extrusion bevels matching the two side ends of the protrusion, and the extrusion bevels are clamped with the part of the protrusion extending above the movable plate.

[0009] Wherein, the limiting boss is a square block structure, and when the second moving plate abuts against the limiting boss, the convex block is clamped into the second clamping groove.

[0010] Wherein, when the two protrusions are in the second card slot, they are separated from the first card slot, and the two ends of the extrusion bevel at the bottom of the extrusion block are in contact with the two sides of the protrusion.

[0011] Among them, a symmetrically distributed clamping block is installed on one side of the top plate corresponding to the guide groove, and the ends of the fixed base plate, the top plate and the clamping block are in a flush state in the initial state.

[0012] The utility model realizes the first ejection of the product and accurately limits the position through the limiting boss during the entire secondary ejection process of the product, and can accurately control the ejection stroke accuracy of the product to prevent the ejection from being over-limited or under-stroked, and then the second ejection mechanism including the moving plate one and the movable plate is used to realize the second ejection of the product, thus completing the secondary ejection of the product, and the secondary ejection mechanism has a small number of structural components, low friction and simple operation, thereby increasing the production range of the product and improving the service life of the mold; during the first ejection process, the moving plate one and the moving plate two move upward, and the moving plate two is fixed to the fixed plate by the guiding push block The guide push block drives the protrusion to move, the moving plate one drives the moving plate to move, and the moving plate also drives the protrusion to move through the card slot one; when the moving plate two abuts against the limit protrusion, it stops running, and at this time the protrusion is laterally aligned to the position of the card slot two and stops moving, and the guide push block also stops pushing the protrusion when the moving plate two stops running, and the moving plate one drives the extrusion block to move during the movement process, and the extrusion block drives the protrusion to approach the position of the card slot two through the extrusion bevel during the upward movement process until the card connection is completed, and the first ejection of the product is completed at this time, so as to form the first ejection of the product, thereby solving the problem of poor ejection stroke control accuracy when the product is demoulded. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings;

[0014] Figure 1 It is a structural stereogram of the entire utility model;

[0015] Figure 2 It is a schematic diagram of the structure cutaway of the utility model;

[0016] Figure 3 It is a schematic diagram of the structural disassembly of the utility model;

[0017] Figure 4 It is a schematic cross-sectional view of a partial structure of the first ejection of the utility model;

[0018] Figure 5 It is a schematic diagram of a partial structural cross-sectional state of the utility model in the initial state;

[0019] Figure 6 It is a schematic diagram of a partial structural cross-sectional state of the first ejection of the utility model;

[0020] Figure 7 It is a schematic diagram of a partial cross-sectional state of the second ejection of the utility model.

[0021] Legend: 1. Fixed base plate; 2. Top plate; 3. Moving plate 1; 4. Moving plate 2; 5. Extrusion block; 6. Limiting boss; 7. Block; 8. Guide groove; 9. Extrusion bevel; 10. Moving plate; 11. Slot 1; 12. Boss; 13. Mounting cavity; 14. Guide push block; 15. Slot 2. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment: This embodiment is used to solve the problem of poor ejection stroke control accuracy when a plastic mold with a complex part structure is demoulded.

[0024] See also Figure 1 - Figure 7 As shown, this embodiment is a secondary ejection mechanism for a plastic mold, comprising a moving component and a fixed component arranged beside the movable mold at the bottom of the plastic mold, the moving component and the fixed component are snap-connected, the fixed component comprises a fixed base plate 1 and a top plate 2, the top plate 2 is plugged with the fixed base plate 1 and the ends are aligned; the moving component comprises a sleeved moving plate 1 3 and a moving plate 2 4, the moving plate 2 4 is symmetrically provided with a guide push block 14 on one side corresponding to the fixed base plate 1, and a moving plate 10 matching the gap of the guide push block 14 is installed on the outer side of the lower end of the moving plate 1 3;

[0025] The inner side of the fixed base plate 1 close to the second moving plate 4 is provided with symmetrically distributed limiting bosses 6, the limiting bosses 6 are square block structures, when the second moving plate 4 abuts against the limiting bosses 6, the bosses 12 are clamped into the second clamping grooves 15;

[0026] An extrusion block 5 is embedded in the middle of the moving plate 2 4 through the installation cavity 13, a guide groove 8 for moving the moving component is provided in the middle of the inner side of the fixed substrate 1, and a second card groove 15 is provided on both sides of the fixed substrate 1 corresponding to the extrusion block 5 through the guide groove 8, and a protrusion 12 that is engaged with the second card groove 15 is provided between the fixed substrate 1 and the moving plate 10, and a card groove 11 that matches the protrusion 12 is provided on both sides of the moving plate 10, and the height of the protrusion 12 is higher than the height of the moving plate 10, and both side ends of the protrusion 12 are semicircular, and the two protrusions 12 are separated from the card groove 11 when they are in the second card groove 15, and the two ends of the extrusion bevel 9 at the bottom of the extrusion block 5 are in contact with both sides of the protrusion 12;

[0027] The bottom of the extrusion block 5 is provided with an extrusion bevel 9 matching the ends of both sides of the protrusion 12. The extrusion bevel 9 is engaged with the portion of the protrusion 12 extending above the movable plate 10. The extrusion bevel 9 is driven by the movement of the extrusion block 5 to complete the movement of the protrusion 12 to both sides, so that the protrusion 12 does not hinder the normal operation of the moving plate 1 3 and the movable plate 10 after docking with the second card slot 15, and thus does not hinder the normal operation of the second ejection.

[0028] A symmetrically distributed clamping block 7 is installed on one side of the top plate 2 corresponding to the guide groove 8, and the ends of the fixed base plate 1, the top plate 2 and the clamping block 7 are in a flush state in the initial state;

[0029] The working principle and advantages of this utility model:

[0030] See also Figure 5 As shown, the plastic mold is in the initial mold closing state;

[0031] See also Figure 3 , Figure 4 and Figure 6As shown, the first ejection of the product is performed: first, the ejection of the top plate 1 drives the ejection of the top plate 2, at which time the moving plate 1 3 and the moving plate 2 4 move upward, the moving plate 2 4 moves in the guide groove 8 on the fixed base plate 1 through the guide push block 14, the guide push block 14 drives the protrusion 12 to move, the moving plate 1 3 drives the moving plate 10 to move, and the moving plate 10 also drives the protrusion 12 to move through the clamping groove 1 11; when the moving plate 2 4 abuts against the limiting protrusion 6, it stops running, at which time the protrusion 12 is horizontally aligned to the position of the clamping groove 2 15 and stops moving, and the guide push block 14 also stops pushing the protrusion 12 when the moving plate 2 4 stops running, and the moving plate 1 3 drives the extrusion block 5 to move during the movement process, and the extrusion block 5 drives the protrusion 12 to approach the position of the clamping groove 2 15 by squeezing the bevel 9 during the upward movement process until the clamping is completed, at which time the first ejection of the product is completed;

[0032] See also Figure 3 and Figure 7 As shown, the second ejection of the product is performed: when the moving plate 2 4 stops running under the limiting action of the limiting boss 6, the moving plate 1 3 continues to run, and the moving plate 1 3 drives the moving plate 10 to break away from the clamping of the convex block 12, that is, the moving plate 1 3 is separated from the moving plate 2 4 as a whole, thereby completing the ejection of the product;

[0033] During the entire secondary ejection process of the product, the limiting boss 6 is pre-set according to the product size, and the first ejection of the product and precise limiting are realized by the limiting boss 6, which can accurately control the ejection stroke accuracy of the product to prevent over-limit or insufficient stroke of ejection, and then the second ejection mechanism including the moving plate 1 3 and the movable plate 10 is used to realize the second ejection of the product, thereby completing the secondary ejection of the product, and the secondary ejection mechanism has a small number of structural components, low friction and simple operation, which increases the production range of the product and improves the service life of the mold.

[0034] The above contents are merely examples and explanations of the structure of the utility model. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A secondary ejection mechanism for a plastic mold, comprising a moving component and a fixed component arranged beside a movable mold at the bottom of the plastic mold, wherein the moving component and the fixed component are connected to each other, and characterized in that: The fixed component comprises a fixed base plate (1) and a top plate (2), the top plate (2) being plugged into the fixed base plate (1) and the ends thereof being aligned; the moving component comprises a first moving plate (3) and a second moving plate (4) being sleeved together, the second moving plate (4) being symmetrically provided with a guide push block (14) on one side corresponding to the fixed base plate (1), and a moving plate (10) matching the gap of the guide push block (14) being installed on the outer side of the lower end of the first moving plate (3); The fixed base plate (1) is provided with symmetrically distributed limiting bosses (6) on the inner side close to the second moving plate (4), and an extrusion block (5) is embedded in the middle of the second moving plate (4) through the installation cavity (13).

2. The secondary ejection mechanism for plastic mold according to claim 1, characterized in that: A guide groove (8) for moving the moving component is provided in the middle of the inner side of the fixed base plate (1), and a second card slot (15) is provided on both sides of the fixed base plate (1) corresponding to the extrusion block (5) through the guide groove (8), and a protrusion (12) that is engaged and matched with the second card slot (15) is provided between the fixed base plate (1) and the moving plate (10).

3. The secondary ejection mechanism for plastic mold according to claim 2, characterized in that: A clamping groove (11) matching with the protrusion (12) is provided on both sides of the movable plate (10); the height of the protrusion (12) is higher than the height of the movable plate (10); and both side ends of the protrusion (12) are semicircular.

4. The secondary ejection mechanism for plastic mold according to claim 3, characterized in that: The bottom of the extrusion block (5) is provided with extrusion bevels (9) matching the ends of both sides of the protrusion (12), and the extrusion bevels (9) are engaged with the portion of the protrusion (12) extending above the movable plate (10).

5. The secondary ejection mechanism for plastic mold according to claim 2, characterized in that: The limiting boss (6) is a square block structure, and when the second moving plate (4) abuts against the limiting boss (6), the convex block (12) is clamped into the second clamping groove (15).

6. The secondary ejection mechanism for plastic mold according to claim 4, characterized in that: When the two protrusions (12) are in the second clamping groove (15), they are separated from the first clamping groove (11), and the two ends of the extrusion bevel (9) at the bottom of the extrusion block (5) abut against the two sides of the protrusion (12).

7. The secondary ejection mechanism for plastic mold according to claim 1, characterized in that: A symmetrically distributed clamping block (7) is installed on one side of the top plate (2) corresponding to the guide groove (8); the ends of the fixed base plate (1), the top plate (2) and the clamping block (7) are in a flush state in an initial state.

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