Ejection mechanism for injection mould

Abstract

The utility model relates to a kind of injection mould ejection mechanism, including straight top piece, the length direction of top block passes through top block hole to make working end surface contact with the product located in the side of straight top piece, the other end of top block is horizontally fixed sliding axle, the end of sliding axle extends top block, guide rail is set outside sliding axle, sliding axle moves along the track of guide rail, the track of guide rail gradually reduces the distance with product in the ejection direction of straight top piece, when straight top piece ejects, drives top block and moves together with sliding axle, guide rail drives top block to move and moves in the product direction in top block hole, product is ejected horizontally, because top block is transversely installed in straight top piece, so no oblique ejection product situation occurs, avoid the phenomenon that ejection mechanism is jammed, injection molding process is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mould application technical field especially relates to a injection mould ejection mechanism. BACKGROUND

[0002] Injection molding is a kind of process method for manufacturing various shapes of plastic products by using plastic forming mould. When injection molding, liquid raw materials are injected into mould forming, then the mould and product are separated and taken out, improper mould taking out can damage the product and even make the previous work in vain.

[0003] Current most mould ejection mechanisms are inclined ejection structures, the inclined ejection structure makes the product demould by inclined force, is easy to be stuck with the mould, needs to separate the mould and product manually, obviously reduces production efficiency. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned prior art defects or deficiencies, the technical problem to be solved by the utility model is to provide a new injection mould ejection mechanism, which applies horizontal force to the product for demoulding and solves the problem of product sticking with the mould.

[0005] To solve the above-mentioned technical problem, the utility model has the following constitution: The injection mould ejection mechanism comprises a straight ejection part, a top block hole penetrating the thickness direction is arranged on the straight ejection part, the length direction of the top block passes through the top block hole so that the working end face contacts the product located at one side of the straight ejection part, the other end of the top block is fixed with a sliding shaft, the center line of the sliding shaft is perpendicular to the center line of the top block hole, the end of the sliding shaft extends out of the top block, guide rails are arranged outside one end or both ends of the end of the sliding shaft, the sliding shaft moves along the track of the guide rail, the track of the guide rail gradually reduces the distance to the product in the ejection direction of the straight ejection part, when the straight ejection part is ejected, the top block and the sliding shaft move together, the guide rail is fixed, the sliding shaft moves along the track of the guide rail, the guide rail drives the top block to move and move to the product direction in the top block hole, and the product is horizontally ejected.

[0006] The cross section of the top block and the top block hole are square.

[0007] The through hole for installing the sliding shaft on the top block is a circular hole, and the two are in interference fit or gap fit.

[0008] The track of the guide rail is a vertical straight line connected to an inclined straight line inclined to the product, or a vertical straight line connected to an inclined curve inclined to the product, and the slope of the inclined straight line or the curvature radius of the inclined curve is determined according to the shape of the product and the demoulding displacement.

[0009] The sliding shaft is connected to the top block through the through hole on the top block, and guide rails are arranged at both ends of the sliding shaft, and the sliding grooves with groove structures are arranged on the guide rails, and both ends of the sliding shaft are located in the sliding grooves.

[0010] Compared with the prior art, the injection mold ejection mechanism has the advantages that: The straight top piece moves vertically, and the top block is driven to horizontally eject the product through the guide rail track, so that the product is not horizontally ejected, the phenomenon of ejection mechanism jamming is avoided, and the injection molding process is safer and more reliable.

[0011] The guide rail track is preferably an inclined straight line, which is convenient for processing and better controls the ejection amount.

[0012] The guide rails at both ends of the sliding shaft limit the sliding shaft in the axial direction, so that the movement of the sliding shaft is more stable and reliable.

[0013] The installation process of the split guide rail requires less space and is easier to operate in a complex mold assembly.

[0014] The round bar-shaped sliding shaft is gap-fitted with the sliding groove to prevent the sliding shaft from being jammed during movement. BRIEF DESCRIPTION OF DRAWINGS

[0015] The following drawings describe some specific embodiments of the present application in an exemplary but non-limiting manner. The same reference signs in the drawings represent the same or similar parts or portions.

[0016] Figure 1 The three-dimensional view of the injection mold ejection mechanism of the present application; Figure 2 The left view of the injection mold ejection mechanism of the present application without ejection; Figure 3 The left view of the injection mold ejection mechanism of the present application after ejection; Figure 4 The position diagram of the straight top piece of the present application in the peripheral mold assembly; Figure 5 The three-dimensional view of the third embodiment of the present application; Figure 6 The three-dimensional view of the split guide rail of the present application; The meanings of the symbols in the drawings are as follows: 1 - straight ejector, 1a - ejector hole, 2 - ejector block, 3 - sliding shaft, 4 - guide rail, 4a - sliding groove, 41 - guide block, 42 - sliding groove block, 5 - product. DETAILED DESCRIPTION

[0017] The concept, specific structure and technical effects of the present application will be further described in combination with the drawings, so as to fully understand the purpose, features and effects of the present application.

[0018] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is a simplified description for the purpose of describing the present application, and does not mean that the elements must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as a limitation on the present application.

[0019] The injection mold ejection mechanism adopts a straight ejector 1 to separate from other mold assemblies and move upward, driving the contact of the product 5 with the ejector block 2 to move upward, the sliding shaft 3 on the ejector block 2 cooperates with the guide rail 4, the trajectory curve of the guide rail 4 makes the ejector block 2 gradually move to the product 5, and the product 5 is horizontally ejected.

[0020] As shown in Figure 1 , Figure 2 , the injection mold ejection mechanism includes a straight ejector 1, a through hole penetrating the thickness direction is provided on the straight ejector 1 as an ejector hole 1a, the ejector block 2 length direction penetrates the ejector hole 1a so that the working end face is in contact with the product 5 located on one side of the straight ejector 1, the other end of the ejector block 2 is horizontally fixed with the sliding shaft 3, the center line of the sliding shaft 3 is perpendicular to the center line of the ejector hole 1a, the end of the sliding shaft 3 extends out of the ejector block 2, the end or both ends of the sliding shaft 3 is provided with a guide rail 4, the sliding shaft 3 moves along the trajectory of the guide rail 4, the trajectory of the guide rail 4 gradually decreases the distance to the product 5 in the ejection direction of the straight ejector 1, for example, Figure 2 , the sliding groove 4a is the trajectory of the guide rail 4, the upper half of the sliding groove 4a is a straight line inclined to the product 5, and the inclined direction is gradually inclined and close to the product 5 along the ejection direction of the straight ejector 1. Figure 2 and Figure 3 respectively show the state of the injection mold ejection mechanism before ejection and after ejection, when Figure 2 , the straight ejector 1 in the direction of the arrow moves upward, driving the ejector block 2 and the sliding shaft 3 to move upward, the guide rail 4 is fixed, the sliding shaft 3 moves along the trajectory of the guide rail 4, the guide rail 4 drives the ejector block 2 to move upward and move to the product 5 in the ejector hole 1a (move to the left in Figure 3 ), so as to move to the product 5, and horizontally eject the product 5.

[0021] The straight ejector 1 moves vertically, and the track of the guide rail 4 drives the ejector block 2 to horizontally eject the product 5. Since the ejector block 2 is horizontally installed in the straight ejector 1, the product 5 will not be obliquely ejected, and the phenomenon of the ejection mechanism being stuck will be avoided, so that the injection molding process is safer and more reliable.

[0022] As an embodiment, the sliding shaft 3 is preferably a round bar (as shown in Figure 2 The through hole in the ejector block 2 is a round hole, and the round bar and the through hole are in interference fit or clearance fit.

[0023] As an embodiment, the cross section of the ejector block 2 and the hole 1a in the ejector block are square (as shown in Figure 5 This prevents the ejector block 2 from rotating, and rotating while ejecting will reduce the stability of the ejecting action.

[0024] Example Two Since the straight ejector 1 needs to move upward by a certain displacement to separate from other mold components before the ejection process (see Figure 4 ), the track of the guide rail 4 in Example One is a vertical straight line connected to an inclined straight line (as shown in Figure 2 ) or an inclined curve toward the product 5. The slope of the inclined straight line or the curvature radius of the inclined curve of the guide rail 4 determines the moving distance of the straight ejector 1 and the ejection amount of the ejector block 2 in the horizontal direction, so the specific track shape of the guide rail 4 should be determined according to the shape of the product 5 and the demolding displacement. In the case of meeting the requirements, the track of the guide rail 4 is preferably an inclined straight line of the sliding groove 4a as shown in Figure 2 and Figure 3 The inclined straight line is easy to process, and the ejection amount is also better controlled.

[0025] Example Three As shown in Figure 5 The sliding shaft 3 is connected to the ejector block 2 through the through hole in the ejector block 2, and the guide rail 4 is arranged at both ends of the sliding shaft 3, and the guide rail 4 is arranged with a sliding groove 4a, Figure 6 The groove shape shown in the middle is an embodiment of the sliding groove 4a, and the two ends of the sliding shaft 3 are located in the sliding groove 4a, and the shape of the sliding groove 4a is the track of the guide rail 4. The through hole processed on the ejector block 2 can realize the connection with the sliding shaft 3, without the need for additional fixing devices. The guide rail 4 is arranged at both ends of the sliding shaft 3, and the guide rails 4 at both ends limit the sliding shaft 3 in the axial direction, ensuring that the movement of the sliding shaft 3 is more stable and reliable.

[0026] As shown in Figure 5 The structures of the two guide rails 4 are not completely consistent, but the sliding grooves 4a are respectively arranged on the inner sides (the sides facing each other) of the two guide rails 4.

[0027] The installation of the guide rail 4 can have two modes, one is to install the guide rail 4 on one side first, to install the guide rail 4 on the other side after the sliding shaft 3 is installed into the top block 2, and the top block 2 is located between the two guide rails 4. Another mode is as shown in Figure 6 The guide rail 4 is made in a split type, the guide block 41 is fixed on a fixed member (a part not moving with the straight top piece 1) beside the mechanism, the sliding shaft 3 is placed into the sliding groove 4a through the top block 2, and then the sliding groove block 42 is fixed on the guide block 41, and the sliding shaft 3 is located in the sliding groove 4a. The installation process of the split type guide rail needs smaller space and is easier to operate in a complex mold assembly.

[0028] As shown in Figure 6 The sliding shaft 3 and the sliding groove 4a are also gap matched to prevent the sliding shaft 3 from being stuck when moving.

[0029] The above embodiments are only used for illustrating the utility model, and are not limited to the utility model. Although the utility model is described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical scheme of the utility model do not deviate from the spirit and scope of the utility model, and should be covered in the claim range of the utility model.

Claims

1. An ejection mechanism for an injection mold, characterized in that, Includes a straight pusher (1), on which a pusher hole (1a) is provided through the thickness direction. A pusher (2) passes through the pusher hole (1a) in the length direction so that its working end face contacts the product (5) located on one side of the straight pusher (1). A sliding shaft (3) is horizontally fixed at the other end of the pusher (2). The center line of the sliding shaft (3) is perpendicular to the center line of the pusher hole (1a). The end of the sliding shaft (3) extends out of the pusher (2). A guide rail (4) is provided outside one or both ends. The sliding shaft (3) moves along the trajectory of the guide rail (4). The distance between the trajectory of the guide rail (4) and the product (5) in the ejection direction of the straight pusher (1) gradually decreases. When the straight pusher (1) is ejected, it drives the top block (2) to move together with the sliding shaft (3). The guide rail (4) remains stationary. The guide rail (4) drives the top block (2) to move while moving in the direction of the product (5) in the top block hole (1a), and ejects the product (5) horizontally.

2. The injection mold ejection mechanism according to claim 1, characterized in that, The trajectory of the guide rail (4) is a vertical straight line connected to an inclined straight line that leans towards the product (5), or a vertical straight line connected to an inclined curve that leans towards the product (5). The slope of the inclined straight line or the radius of curvature of the inclined curve of the guide rail (4) is determined according to the shape of the product (5) and the demolding displacement.

3. The injection mold ejection mechanism according to claim 1, characterized in that, The sliding shaft (3) passes through the through hole on the top block (2) and is connected to the top block (2). The guide rail (4) is provided at both ends of the sliding shaft (3). The guide rail (4) is provided with a groove (4a) with a groove structure. The two ends of the sliding shaft (3) are located in the groove (4a).

4. The injection mold ejection mechanism according to claim 3, characterized in that, The grooves (4a) are respectively opened on the inner side of the two guide rails (4).

5. The injection mold ejection mechanism according to claim 4, characterized in that, The guide rail (4) is a split type. The guide block (41) is fixed on the fixing member. The inner side of the sliding block (42) on the left and right sides is slotted. The sliding shaft (3) passes through the top block (2) and is placed in the sliding groove (4a). Then the sliding block (42) is fixed on the guide block (41).

6. The injection mold ejection mechanism according to claim 3, characterized in that, The sliding shaft (3) is clearance-fitted with the sliding groove (4a).

7. The injection mold ejection mechanism according to claim 1, characterized in that, The cross-section of the top block (2) and the hole (1a) of the top block are square.

8. The injection mold ejection mechanism according to claim 1, characterized in that, The sliding shaft (3) is a round bar, and the through hole on the top block (2) for mounting the sliding shaft (3) is a round hole. The sliding shaft (3) and the round hole on the top block (2) are either interference fit or clearance fit.

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