Delayed ejection structure applied to injection mold

Abstract

The utility model discloses a delayed ejection structure applied to an injection mold, which relates to the technical field of injection molds and comprises a base, a lower mold is fixedly mounted at the top end of the base, an ejection component is arranged at the bottom end of the lower mold, and two vibration components are arranged at the top end of the base. The ejection assembly comprises two sliding rods, the outer walls of the two sliding rods are both sleeved with first springs, and ejection blocks are fixedly installed at the top ends of the two sliding rods. The vibration assembly comprises a rotating rod and two mounting plates, a group of cylinders are fixedly mounted on the outer walls of the two mounting plates, a rubber impact block is arranged on one side of the outer wall of each cylinder, a gear is fixedly mounted on one side of the outer wall of the rotating rod, and the vibration assembly is arranged to enable the lower mold to vibrate, so that the friction force between a finished product and a mold cavity is reduced; and the finished product can be ejected out through the ejection assembly by utilizing the elastic force of the spring, so that the damage to the finished product caused by direct ejection is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is the delay ejection structure for being applied to injection mold. BACKGROUND

[0002] The mold is indispensable important equipment in injection molding. Injection molding is a method of injecting raw materials with a certain temperature into the gap formed by the male die and the female die to form a product. The injection molding method has the characteristics of low molding cost, short molding cycle and simple molding process.

[0003] In the prior art, such as a kind of injection mold ejection structure in patent No. CN220482468U, including base, the top of base is equipped with installation slot, the two sides of installation slot inner wall are equipped with recess, the inner wall of recess is equipped with adjusting assembly, the edge of installation slot inner wall is provided with lower die seat, the two sides of base top are provided with several fixed rods, the top of several fixed rods is fixedly connected with the bottom of top plate, the middle part of top plate bottom is fixedly connected with the top of upper die seat by hydraulic rod. Two threaded rods are driven to rotate by being provided with two motors, two groups of sliding blocks cooperate with the reverse threads in the surface of two threaded rods to move reversely, cooperate with two groups of first hinged seat and second hinged seat to drive two groups of connecting rods to move, so as to drive support plate to move on the surface of two groups of limiting rods, facilitate driving several ejector rods to pass through several insertion holes and cooperate with ejector block to eject finished product after injection molding.

[0004] Although the above-mentioned patent can eject the finished product after injection molding, there are still some problems. The finished product may be tightly attached to the mold cavity, which results in a large friction force of the finished product in the mold cavity. Directly ejecting the finished product may cause damage to the mold. Two motors are provided at the bottom end of the mold, which undoubtedly increases the production cost. Therefore, the utility model provides a delay ejection structure for injection mold. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a delay ejection structure for injection mold, which solves the problem that the finished product may be tightly attached to the mold cavity, which results in a large friction force of the finished product in the mold cavity. Directly ejecting the finished product may cause damage to the mold. Two motors are provided at the bottom end of the mold, which undoubtedly increases the production cost.

[0006] To achieve the above purpose, the utility model is implemented by the following technical solutions: a delay ejection structure for injection mold, comprising a base, a lower mold fixedly installed at the top end of the base, a ejection assembly provided at the bottom end of the lower mold, and two vibration assemblies provided at the top end of the base.

[0007] The ejection assembly comprises a mounting frame, two slide rods are slidably arranged at the bottom end of the mounting frame, the outer wall of each of the two slide rods is sleeved with a first spring, and the top end of each of the two slide rods is fixedly installed with an ejection block.

[0008] The vibration assembly comprises a rotating rod and two mounting plates, a group of cylinders are fixedly installed on the outer wall of the two mounting plates, rubber impact blocks are arranged on one side of the outer wall of the cylinders, and a gear is fixedly installed on one side of the outer wall of the rotating rod.

[0009] Preferably, the top end of the lower mold is provided with an upper mold, the outer wall of the upper mold is fixedly installed with two pressing plates on both sides, the bottom end of each of the two pressing plates penetrates the bottom end of the base, the bottom end of each of the two slide rods is fixedly installed with a connecting plate, and the two pressing plates are arranged above the connecting plate.

[0010] Preferably, the mounting frame is fixedly installed at the bottom end of the base, one end of each of the two first springs is fixedly connected with the mounting frame, the other end of each of the two first springs is fixedly connected with the ejection block, and the ejection block slidably penetrates the top end of the base and the inner wall of the lower mold.

[0011] Preferably, the vibration assembly further comprises two vertical plates, the two vertical plates are fixedly installed at the top end of the base, the rotating rod is rotatably installed between the opposite sides of the two vertical plates, the two mounting plates are fixedly connected with the rotating rod, and one end of the outer wall of the rotating rod penetrates the outer wall of the vertical plate.

[0012] Preferably, a second spring is fixedly installed at one end of the inner wall of the cylinder, one end of the second spring is fixedly installed with a slide column, the slide column is movably inserted into the inner wall of the cylinder, a limiting groove is formed in the outer wall of the cylinder, a limiting block is movably inserted into the limiting groove, the limiting block is fixedly connected with the slide column, and one end of the outer wall of the slide column is fixedly connected with the rubber impact block.

[0013] Preferably, two movable racks are fixedly installed on the outer wall of the upper mold, the bottom end of each of the two movable racks penetrates the bottom end of the base, two gears are movably arranged on each of the two movable racks, a rack is fixedly installed at the top end of the base, a hydraulic rod is fixedly installed at the top end of the rack, and the output end of the hydraulic rod is fixedly connected with the upper mold.

[0014] Beneficial effects

[0015] The utility model provides a delay ejection structure applied to injection mold, has the following beneficial effects compared with prior art:

[0016] 1. The application is applied to the delayed ejection structure of injection mold, the upper mold is driven to descend with the lower mold by the hydraulic rod and is combined with the lower mold, then injection is carried out, when the finished product is formed after injection, the hydraulic rod is opened and drives the upper mold to ascend, in this process, the moving rack moves upward and is engaged with the gear, drives the rotating rod to rotate. The rotating rod drives the mounting plate to rotate, so that the rubber impact block on the cylinder continuously impacts the lower mold, the rubber impact block is extruded by the lower mold in the rotating process, so as to move inward and compress the second spring, at this time, the rubber impact block can rotate away from the surface of the lower mold, with the continuous rotation of the rotating rod, the rubber impact block can continuously impact the lower mold, so that the lower mold vibrates, so that the finished product which is closely combined with the surface of the mold cavity is loose, thereby reducing the friction between the finished product and the mold cavity, reducing the difficulty of the finished product from the mold, and avoiding the damage to the mold caused by the large friction when directly ejecting.

[0017] 2. The application is applied to the delayed ejection structure of injection mold, the upper mold is driven to descend with the lower mold by the hydraulic rod and is combined with the lower mold, then injection is carried out, when the finished product is formed after injection, the hydraulic rod is opened and drives the upper mold to ascend, in this process, the moving rack moves upward and is engaged with the gear, drives the rotating rod to rotate. The rotating rod drives the mounting plate to rotate, so that the rubber impact block on the cylinder continuously impacts the lower mold, the rubber impact block is extruded by the lower mold in the rotating process, so as to move inward and compress the second spring, at this time, the rubber impact block can rotate away from the surface of the lower mold, with the continuous rotation of the rotating rod, the rubber impact block can continuously impact the lower mold, so that the lower mold vibrates, so that the finished product which is closely combined with the surface of the mold cavity is loose, thereby reducing the friction between the finished product and the mold cavity, reducing the difficulty of the finished product from the mold, and avoiding the damage to the mold caused by the large friction when directly ejecting. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic diagram of the utility model;

[0019] Figure 2 It is the overall structure schematic diagram of another view of the utility model;

[0020] Figure 3 It is the cross section schematic diagram of the ejection assembly and the lower mold of the utility model;

[0021] Figure 4 It is the related structure schematic diagram of the vibration assembly of the utility model;

[0022] Figure 5 It is the cross section schematic diagram of the cylinder.

[0023] In the figure: 1, base; 2, lower mold; 3, upper mold; 4, pressing plate; 5, ejection assembly; 51, mounting frame; 52, sliding rod; 53, first spring; 54, ejection block; 55, connecting plate; 6, moving rack; 7, vibration assembly; 71, vertical plate; 72, rotating rod; 73, gear; 74, mounting plate; 75, cylinder; 76, second spring; 77, sliding column; 78, rubber impact block; 79, limiting block; 710, limiting groove; 8, rack; 9, hydraulic rod. DETAILED DESCRIPTION

[0024] 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, rather than 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.

[0025] The utility model provides two technical schemes:

[0026] Figures 1-5 The first embodiment is shown: the delay ejection structure for injection mold, including base 1, the top of base 1 is fixedly installed with lower mold 2, the bottom of lower mold 2 is provided with ejection assembly 5, the top of base 1 is provided with two vibration assemblies 7;

[0027] Ejection assembly 5 includes mounting frame 51, two sliding rods 52 are slidably penetrated through the bottom of mounting frame 51, the outer wall of two sliding rods 52 is sleeved with first spring 53, the top of two sliding rods 52 is fixedly installed with ejection block 54;

[0028] Vibration assembly 7 includes rotating rod 72 and two mounting plates 74, a group of cylinders 75 are fixedly installed on the outer wall of two mounting plates 74, rubber impact block 78 is arranged on the outer wall of one side of cylinder 75, gear 73 is fixedly installed on the outer wall of one side of rotating rod 72.

[0029] The top of lower mold 2 is provided with upper mold 3, the outer wall of both sides of upper mold 3 is fixedly installed with pressing plate 4, the bottom of two pressing plates 4 is penetrated through the bottom of base 1, so that pressing plate 4 can pass through the bottom end, and contact with the connecting plate 55 below, at the same time, the appropriate length of pressing plate 4 is arranged, so that when upper mold 3 and lower mold 2 are closed, pressing plate 4 can press connecting plate 55, and two sliding rods 52 and ejection block 54 are moved downward through connecting plate 55, at this time, first spring 53 is compressed, so that ejection block 54 is flush with the bottom of the inner wall of lower mold 2, so as not to affect the injection of lower mold 2, the bottom of two sliding rods 52 is fixedly installed with connecting plate 55, and two pressing plates 4 are arranged above connecting plate 55.

[0030] The mounting frame 51 is fixedly installed at the bottom end of the base 1, one end of the two first springs 53 is fixedly connected with the mounting frame 51, the other end of the two first springs 53 is fixedly connected with the two ejection blocks 54 respectively, the ejection blocks 54 are slidably penetrated through the top end of the base 1 and the inner wall of the lower mold 2, so that the ejection blocks 54 can slide, and under the action of the elasticity of the first spring 53, the ejection blocks 54 can move upward, thereby the finished product in the lower mold 2 is lifted up.

[0031] Figures 1-5 The second embodiment is shown, and the main difference with the first embodiment is that the vibration assembly 7 further comprises two vertical plates 71, the two vertical plates 71 are fixedly installed at the top end of the base 1, the rotating rod 72 is rotatably installed between the opposite sides of the two vertical plates 71, the two mounting plates 74 are fixedly connected with the rotating rod 72, and one end of the outer wall of the rotating rod 72 penetrates through the outer wall of the vertical plate 71.

[0032] The second spring 76 is fixedly installed at one end of the inner wall of the cylinder 75, the slide column 77 is fixedly installed at one end of the second spring 76, the slide column 77 is movably inserted into the inner wall of the cylinder 75, the limiting groove 710 is formed through the outer wall of the cylinder 75, the limiting block 79 is movably inserted into the limiting groove 710, the limiting block 79 is fixedly connected with the slide column 77, one end of the outer wall of the slide column 77 is fixedly connected with the rubber impact block 78, the limiting block 79 can limit the slide column 77, preventing the slide column 77 from being separated from the cylinder 75, and the vibration assembly 7 is set at a proper distance from the lower mold 2, so that when the rubber impact block 78 rotates, the rubber impact block 78 can contact the surface of the lower mold 2, the rubber impact block 78 can impact the lower mold 2, the surface of the lower mold 2 vibrates, and the end of the rubber impact block 78 is arc-shaped, when the rubber impact block 78 rotates and impacts the surface of the lower mold 2, the rubber impact block 78 can be extruded into the cylinder 75, at this time, the second spring 76 is compressed, so that the rubber impact block 78 can continue to rotate, preventing the rubber impact block 78 from being stuck on the surface of the lower mold 2 due to the excessive length.

[0033] The two movable racks 6 are fixedly installed at the outer wall of the upper mold 3, the bottom end of the two movable racks 6 penetrates through the bottom end of the base 1, the two movable racks 6 are respectively provided with two gear wheels 73, when the movable rack 6 rises and falls, the gear wheel 73 rotates, the rack 8 is fixedly installed at the top end of the base 1, the hydraulic rod 9 is fixedly installed at the top end of the rack 8, and the output end of the hydraulic rod 9 is fixedly connected with the upper mold 3.

[0034] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0035] When working, the upper mold 3 is lowered to combine with the lower mold 2 by the hydraulic rod 9, the pressing plates 4 on the outer wall of the upper mold 3 move downward, the pressing plates 4 press on the connecting plate 55 during the downward movement, the connecting plate 55 drives the sliding rod 52 to slide downward, the ejection block 54 on the sliding rod 52 also moves downward and compresses the first spring 53, at this time, the ejection block 54 is located in the lower mold 2 and does not affect the injection molding process, when the injection molding is completed and the product is formed, the upper mold 3 is lifted by the hydraulic rod 9, during the process, the moving rack 6 moves upward and engages with the gear 73 to drive the rotating rod 72 to rotate. The rotating rod 72 drives the mounting plate 74 to rotate, so that the rubber impact block 78 on the cylinder 75 continuously impacts the lower mold 2, the rubber impact block 78 is extruded by the lower mold 2 during the rotation and moves inward to compress the second spring 76, at this time, the rubber impact block 78 can rotate away from the surface of the lower mold 2, the rubber impact block 78 can continuously impact the lower mold 2 as the rotating rod 72 continuously rotates, so that the lower mold 2 vibrates, the product which is originally closely attached to the surface of the mold cavity is loosened, thereby reducing the friction between the product and the mold cavity, reducing the difficulty of the product falling out of the mold, and avoiding damage to the mold caused by large friction when directly ejecting. When the upper mold 3 rises, the pressing plates 4 can be driven away from the connecting plate 55, at this time, the compressed first spring 53 begins to rebound, the first spring 53 gradually releases energy during the rebounding process, so that the ejection force increases smoothly, under the vibration of the vibration assembly 7, when the elastic force of the first spring 53 is greater than the weight of the product and the friction with the lower mold 2 cavity, the ejection block 54 is pushed to move upward, the ejection block 54 passes through the lower mold 2 to eject the product from the lower mold 2, thereby realizing the delayed ejection of the product and avoiding damage to the product caused by direct ejection. At the same time, the upper mold 3 is driven upward by the hydraulic rod 9, the vibration assembly 7 is driven to work by the engagement of the moving rack 6 and the gear 73, and the ejection assembly 5 is cooperated, so that the product can be ejected, the use of driving devices such as motors is reduced, and the equipment cost is reduced.

[0036] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0037] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A delayed ejection structure applied to an injection mold, comprising a base (1), a lower mold (2) fixedly installed at the top end of the base (1), characterized in that: The bottom end of the lower mold (2) is provided with an ejection assembly (5), and the top end of the base (1) is provided with two vibration assemblies (7); The ejection assembly (5) comprises a mounting frame (51), the bottom end of the mounting frame (51) is slidably penetrated by two slide rods (52), the outer wall of each of the two slide rods (52) is sleeved with a first spring (53), and the top end of each of the two slide rods (52) is fixedly installed with an ejection block (54); The vibration assembly (7) comprises a rotating rod (72) and two mounting plates (74), the outer wall of each of the two mounting plates (74) is fixedly installed with a group of cylinders (75), one side of the outer wall of the cylinder (75) is provided with a rubber impact block (78), and one side of the outer wall of the rotating rod (72) is fixedly installed with a gear (73).

2. The delayed ejection structure for injection mold according to claim 1, characterized in that: The top end of the lower mold (2) is provided with an upper mold (3), the outer wall of the upper mold (3) is fixedly installed with two pressing plates (4) on both sides, the bottom end of each of the two pressing plates (4) penetrates the bottom end of the base (1), the bottom end of each of the two slide rods (52) is fixedly installed with a connecting plate (55), and the two pressing plates (4) are arranged directly above the connecting plate (55).

3. The delayed ejection structure for injection mold according to claim 1, characterized in that: The mounting frame (51) is fixedly installed at the bottom end of the base (1), one end of each of the two first springs (53) is fixedly connected with the mounting frame (51), the other end of each of the two first springs (53) is fixedly connected with the ejection block (54), and the ejection block (54) is slidably penetrated through the top end of the base (1) and the inner wall of the lower mold (2).

4. The delayed ejection structure for injection mold according to claim 1, wherein: The vibration assembly (7) further comprises two vertical plates (71), each of the two vertical plates (71) is fixedly installed at the top end of the base (1), the rotating rod (72) is rotatably installed between the opposite sides of the two vertical plates (71), and each of the two mounting plates (74) is fixedly connected with the rotating rod (72). One end of the outer wall of the rotating rod (72) penetrates the outer wall of the vertical plate (71).

5. The delayed ejection structure for use in an injection mold according to claim 1, characterized in that: The inner wall of the cylinder (75) is fixedly installed with a second spring (76) at one end, one end of the second spring (76) is fixedly installed with a sliding column (77), the sliding column (77) is movably inserted into the inner wall of the cylinder (75), the outer wall of the cylinder (75) is penetrated to form a limiting groove (710), the limiting groove (710) is movably inserted with a limiting block (79), the limiting block (79) is fixedly connected with the sliding column (77), and one end of the outer wall of the sliding column (77) is fixedly connected with the rubber impact block (78).

6. The delayed ejection structure for use in an injection mold according to claim 2, wherein: The outer wall of the upper mold (3) is fixedly installed with two movable racks (6), the bottom end of each of the two movable racks (6) penetrates the bottom end of the base (1), each of the two movable racks (6) is meshingly provided with two gears (73), the top end of the base (1) is fixedly installed with a rack (8), the top end of the rack (8) is fixedly installed with a hydraulic rod (9), and the output end of the hydraulic rod (9) is fixedly connected with the upper mold (3).

Images