Top block floating structure

Abstract

The utility model belongs to the field of automobile injection molds, and particularly relates to a top block floating structure which comprises a top block, a top block guide sliding sleeve, a top block rod, a fixing sleeve, a spring and a pressing plate, the bottom of the top block is fixed at the top of the top block rod, the top block guide sliding sleeve is sleeved outside the middle of the top block rod, the top block rod moves in the top block guide sliding sleeve, and the fixing sleeve is hollow. The bottom of the top block rod is inserted into the upper hollow part of the fixing sleeve and is connected with the fixing sleeve through a screw, the spring is placed in the lower hollow part of the fixing sleeve, the pressing plate is installed at the bottom of the fixing sleeve, and the spring is compressed to have elasticity. The bottom end of the fixing sleeve is provided with a boss, and the diameter of the boss is larger than that of the part, above the boss, of the fixing sleeve. The lower portion of the fixing sleeve is arranged in the bottom plate. By adopting the fixing sleeve and the spring, the ejector block is ejected out together with a product under the action of the spring and stops after moving for a certain distance, so that a rib of the product is separated from the mold, then the mold continuously ejects the product, the product is separated from the ejector block, and the problem of mold sticking is solved.

Description

Technical Field

[0001] The utility model belongs to the field of automotive injection molds, and particularly relates to a floating ejector block structure. Background Art

[0002] For the conventional ejector block structure of plastic molds (as shown in Figure 1 ), restricted by the deep rib structure characteristics of the product, in order to increase the product function and support its own strength, automotive products are designed with very deep support ribs and limit ribs, generally more than 25 mm. If the mold directly ejects with the ejector block, due to the ribs of the product being too deep, the shrinkage of the product after ejection is too large, making it difficult to remove the part, and the mouth of the rib will also be damaged; in addition, when the ribs of the product are dense, the risk of the product sticking to the mold is greater. When ejecting, the ejector block is subjected to a large force, and the product will stick to the ejector block, making it impossible to remove the part and requiring a large amount of mold release agent; moreover, during the trial mold and production processes, it is time-consuming and laborious, resulting in a large waste of labor costs. Summary of the Invention

[0003] To solve the above problems existing in the prior art, the utility model provides a floating ejector block structure, which adopts the cooperation of a fixed sleeve and a spring, so that the ejector block is ejected together with the product under the action of the spring and stops after moving a certain distance, separating the ribs of the product from the mold itself, and then the mold continues to eject the product, separating the product from the ejector block, for solving the problem of mold sticking.

[0004] To achieve the above object, the utility model provides the following technical solution: a floating ejector block structure, including an ejector block, an ejector block guide sleeve, an ejector block rod, a fixed sleeve, a spring and a pressing plate. The bottom of the ejector block is fixed to the top of the ejector block rod. The ejector block guide sleeve is sleeved outside the middle part of the ejector block rod and the ejector block rod moves in the ejector block guide sleeve. The inside of the fixed sleeve is hollow. The bottom of the ejector block rod is inserted into the upper hollow part of the fixed sleeve and is connected to the fixed sleeve by a screw. A spring is placed in the lower hollow part of the fixed sleeve. The pressing plate is installed at the bottom of the fixed sleeve and the spring is compressed to have elasticity.

[0005] Further, a convex platform is provided at the bottom end of the fixed sleeve, and the diameter of the convex platform is larger than the diameter of the part of the fixed sleeve above the convex platform.

[0006] Further, the lower part of the fixed sleeve is arranged inside the bottom plate, and a hole is opened in the bottom plate. The diameter of the upper part of the hole is adapted to the diameter of the upper part of the fixed sleeve, and the diameter of the middle part of the hole is adapted to the diameter of the convex platform.

[0007] Further, the axial length of the middle part of the hole is longer than the axial length of the convex platform by a, and a is 17 mm.

[0008] Further, an inwardly protruding convex block is provided at the upper hollow part of the fixed sleeve. The bottom of the ejector block rod is inserted into the fixed sleeve and is limited by the convex block. The outer diameter of the ejector block rod is adapted to the upper hollow part.

[0009] Compared with the prior art, the beneficial effects of the utility model are that: the utility model keeps a section of the product synchronous with the top block in the process of ejection, and other structures of the mold continue to be pushed up after the synchronous end, which plays the role of ejection, improves the situation of sticking to the mold, improves the product quality of the product, and does not cause the difficulty of taking the product, occupies small space, and is balanced in ejection, and the structure is stable, thereby greatly reducing the risk in the production process, and reducing the cost and procurement cost of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a prior art structure schematic diagram;

[0011] Figure 2 It is a structure schematic diagram of the utility model;

[0012] Figure 3 It is a structure explosion diagram of the utility model;

[0013] Figure 4 It is Figure 2 the section view at A-A;

[0014] Figure 5 It is a structure schematic diagram of the utility model installed on the mold;

[0015] Figure 6 It is Figure 5 the section view at B-B;

[0016] Figure 7 It is a structure schematic diagram of the utility model ejecting the product on the mold;

[0017] Figure 8 It is Figure 7 the section view at C-C;

[0018] Figure 9 It is Figure 6 the enlarged view at D;

[0019] Figure 10 It is Figure 8 the enlarged view at E. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 2-10The utility model provides the following technical scheme: A top block floating structure, including top block 2, top block guide sliding sleeve 3, top block rod 4, fixed sleeve 5, spring 6 and pressing plate 7, top block 2 top is on one side of product 1 with deep muscle, and top block 2 bottom is fixed in top block rod 4 top through screw, and top block guide sliding sleeve 3 is connected in the outside of top block rod 4 middle part and top block rod 4 moves in top block guide sliding sleeve 3, and top block guide sliding sleeve 3 has the effect of guiding and lubricating to top block rod 4, protects top block rod 4 from being damaged when moving, and the inside hollow 52 of fixed sleeve 5, and top block rod 4 bottom is inserted into the upper hollow 52 of fixed sleeve 5 and is connected through screw and fixed sleeve 5, and spring 6 is placed in the lower hollow 52 of fixed sleeve 5, and the radial length of the upper hollow 52 of fixed sleeve 5 is less than the radial length of lower hollow 52, when installing on the mould, pressing plate 7 is installed in the bottom of fixed sleeve 5 and spring 6 is compressed and has elasticity, and the top of spring 6 contacts and is resisted in the top end of lower hollow 52, and pressing plate 7 is fixed on the mould, when the mould is in the process of ejection, spring 6 has the upward thrust to fixed sleeve 5 and top block rod 4, can ensure that top block 2 ejects with product 1 synchronously and stops after a distance, at this moment, the muscle of product 1 is separated from the mould itself, can reduce the stress of top block 2 in this process, and top block 2 can also protect product 1 from being damaged in the mouth of muscle, then the mould continues to eject upwards, so that product 1 and top block 2 are separated, since the stress of top block 2 is small when ejecting with product 1, so product 1 is not seriously adhered to top block 2, can separate product 1 and top block 2 easily through the mould, avoids spending a lot of time and energy to solve the problem of product 1 adhering to top block 2 in later period.

[0022] Specifically, the fixed sleeve 5 is provided with a boss 51 at the bottom end, and the diameter of the boss 51 is greater than the diameter of the upper part of the fixed sleeve 5.

[0023] Specifically, the fixed sleeve 5 is arranged in the bottom plate 8, and the bottom plate 8 is provided with a hole 81, the diameter of the upper part of the hole 81 is matched with the diameter of the upper part of the fixed sleeve 5, the diameter of the middle part of the hole 81 is matched with the diameter of the boss 51, the fixed sleeve 5 can move in the bottom plate 8 under the action of the spring, and the fixed sleeve 5 moves axially up and down in the middle part of the hole 81 through the boss 51, so that the fixed sleeve 5 drives the top block rod 4 to move up and down.

[0024] Specifically, the axial length of the middle part of the hole 81 is longer than the axial length of the boss 51 by a, and a is 17 mm, so the fixed sleeve 5 can move upward by 17 mm, and therefore, when the mould is ejected, the top block 2 and the product 1 are ejected synchronously by 17 mm, so that the muscle of the product 1 is separated from the mould itself.

[0025] Specifically, the fixed sleeve 5 upper hollow 52 is provided with a bulge 53 inwardly protruding, the top block rod 4 bottom is inserted into the fixed sleeve 5 and is limited by the bulge 53, the top block rod 4 is also connected with the fixed sleeve 5 by the bulge 53 with screws, the outer diameter of the top block rod 4 is matched with the upper hollow 52, which can ensure that the top block rod 4 is connected with the fixed sleeve 5 firmly and stably, and avoid being damaged when the top block rod 4 moves.

[0026] The utility model installs and moves process: first fixed sleeve 5 is installed into the hole 81 of bottom plate 8, then top block 2 and top block rod 4 are fixed with screw, top block rod 4 passes through top block guide sleeve 3, needle plate 9 in turn from the front, and then is inserted into the upper hollow 52 of fixed sleeve 5, top block rod 4 can move up and down in needle plate 9, top block guide sleeve 3 is fixed on the mould, then the bottom of top block rod 4 is connected with fixed sleeve 5 by screw, then spring 6 is placed into the lower hollow 52 of fixed sleeve 5, finally cover plate 7 is fixed at the bottom of bottom plate 8 by screw, at this time, spring 6 is compressed, the bottom of needle plate 9 abuts against the top of fixed sleeve 5, so it is assembled. When in the process of ejection, spring 6 has the upward thrust to fixed sleeve 5 and top block rod 4, can ensure that top block 2 stops after synchronously ejecting 17mm with product 1, at this time, the rib of product 1 is separated from the mould itself, can reduce the stress of top block 2 in this process, and top block 2 can also protect product 1 from being damaged by the mouth of the rib, then the top rod 10 on the mould continues to eject upwards, so that product 1 and top block 2 are separated, since the stress of top block 2 is small when ejecting together with product 1, product 1 is not seriously stuck on top block 2, product 1 and top block 2 can be separated easily by the mould, avoiding spending a lot of time and energy to solve the problem of product 1 sticking to top block 2 in the later period.

[0027] The utility model plays the role of ejection, improves the condition of sticking to the mould, improves the quality of product 1, and will not cause the difficulty of taking the product, and the ejection is balanced, and the structure is stable, thereby greatly reducing the risk in the production process. When product 1 has one or more dense ribs with a height of 25mm, the utility model can solve the problems of concentrated stress of top block 2 during ejection, product 1 sticking to the mould and damage of the mouth, and also avoid the expensive cost of later rectification of the mould.

[0028] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A floating top block structure, characterized in that, The device includes a top block (2), a top block guide sleeve (3), a top block rod (4), a fixing sleeve (5), a spring (6), and a pressure plate (7). The bottom of the top block (2) is fixed to the top of the top block rod (4). The top block guide sleeve (3) is sleeved outside the middle part of the top block rod (4), and the top block rod (4) moves in the top block guide sleeve (3). The fixing sleeve (5) is hollow (52). The bottom of the top block rod (4) is inserted into the upper hollow (52) of the fixing sleeve (5) and connected to the fixing sleeve (5) by screws. The spring (6) is placed in the lower hollow (52) of the fixing sleeve (5). The pressure plate (7) is installed at the bottom of the fixing sleeve (5), and the spring (6) is compressed and has elasticity.

2. The floating top block structure according to claim 1, characterized in that, The bottom end of the fixing sleeve (5) is provided with a boss (51), and the diameter of the boss (51) is larger than the diameter of the part above the boss (51) on the fixing sleeve (5).

3. The floating top block structure according to claim 2, characterized in that, The lower part of the fixing sleeve (5) is set inside the base plate (8), and the base plate (8) has a hole (81). The upper diameter of the hole (81) is adapted to the upper diameter of the fixing sleeve (5), and the middle diameter of the hole (81) is adapted to the diameter of the boss (51).

4. A floating top block structure according to claim 3, characterized in that, The axial length of the middle part of the hole (81) is longer than the axial length of the boss (51) by a, where a is 17mm.

5. A floating top block structure according to claim 4, characterized in that, The upper hollow (52) of the fixed sleeve (5) is provided with an inwardly protruding protrusion (53). The bottom of the top block rod (4) is inserted into the fixed sleeve (5) and limited by the protrusion (53). The outer diameter of the top block rod (4) is adapted to the upper hollow (52).

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