Bidirectional inclined top synchronous demolding mechanism

Abstract

The utility model discloses a kind of two-way inclined ejector synchronous demolding mechanism, including mould body;The mould body is composed of lower mould and upper mould, the lower mould is located below upper mould, guiding mechanism is installed between the two sides of upper mould and the two sides of lower mould, core is installed in the lower mould, installation groove is arranged in the lower mould inside below core, the ejector mechanism is installed in the installation groove inside, fixed groove is arranged in the lower mould inside in the two sides of core, side extraction mechanism is installed in the fixed groove inside, pouring hole is installed in the upper end intermediate position of upper mould.The ejector mechanism of the utility model lower mould inside below core is responsible for from bottom to push up the forming piece, and the side extraction mechanism in the fixed groove of the two sides of core is then synchronously from the side of forming piece and separates the side structure, by the two-way cooperation of ejecting and side extraction, the synchronous demolding of forming piece is realized, the problem that traditional single direction demolding is prone to cause forming piece deformation or jamming is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of demolding mechanisms, specifically a bidirectional inclined top synchronous demolding mechanism. Background Technology

[0002] The bidirectional inclined ejector synchronous demolding mechanism is a complex demolding device used in injection molds, mainly to solve the demolding problem when a plastic part has two inward undercuts (or protrusions) in different directions. Its core feature is that it achieves synchronous movement of the inclined ejectors (core-pulling elements) in two directions through a mechanical structure. During the mold opening process, the core-pulling action in different directions is completed simultaneously, and the plastic part is successfully ejected, avoiding damage to the plastic part due to interference from the undercuts.

[0003] Chinese Patent No. 202120957414.9 discloses a bidirectional inclined ejector injection mold, comprising: a front template, a moving mold core disposed opposite to the front template, and a bidirectional inclined ejector mechanism. The grooves on the front template and the moving mold core together form a body cavity for injection molding a product. The bidirectional inclined ejector mechanism is movably inserted into the moving mold core. The bidirectional inclined ejector mechanism includes an inclined ejector rod and two inclined ejector inserts. The two inclined ejector inserts are rotatably mounted on the ends of the inclined ejector rod. A snap-fit ​​cavity for snapping on the product is provided between the two inclined ejector inserts. An elastic member is installed between the two inclined ejector inserts, and the two inclined ejector inserts tend to open outward under the elastic force of the elastic member.

[0004] When this utility model is in use, the material is ejected by a spring. After prolonged use, the spring will age and abnormal discharge may occur. Utility Model Content

[0005] The purpose of this invention is to provide a bidirectional inclined ejector synchronous demolding mechanism to solve the problems raised in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional inclined ejector synchronous demolding mechanism, comprising a mold body; the mold body consists of a lower mold and an upper mold, the lower mold being located below the upper mold, a guide mechanism being installed between the two sides of the upper mold and the two sides of the lower mold, a mold core being installed inside the lower mold, an installation groove being provided inside the lower mold below the mold core, an ejection mechanism being installed inside the installation groove, a fixing groove being provided inside the lower mold on both sides of the mold core, a side-pull mechanism being installed inside the fixing groove, and a pouring hole being installed at the middle position of the upper end of the upper mold.

[0007] Preferably, the ejection mechanism consists of a telescopic rod, a top plate, and an ejector pin. The telescopic rod is installed at the bottom of the mounting groove, the top plate is installed on the upper side of the telescopic rod, and an ejector pin is installed at the upper end of the top plate. The ejector pin passes through the lower mold and extends into the mold core.

[0008] Preferably, the outer sides of the upper and lower molds are provided with a corrosion-resistant layer, which is a chrome-plated layer.

[0009] Preferably, the guiding mechanism consists of guide rods and through holes. The guide rods are installed on the lower sides of the upper mold, and the through holes are installed on the lower mold. The guide rods are slidably installed inside the through holes.

[0010] Preferably, the side-pulling mechanism consists of a core post, a slider, and a pressure block. The pressure block is slidably installed inside the fixed groove, the slider is slidably installed inside the fixed groove at the bottom of the pressure block, the core post is installed on one side of the slider, and one end of the core post extends into the mold core.

[0011] Preferably, a return spring is sleeved on the outside of the core post, and the return spring is installed inside the fixing groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The ejection mechanism below the inner core of the lower mold is responsible for pushing the molded part upward from the bottom, while the side pulling mechanism in the fixing groove on both sides of the mold core simultaneously pulls the side structure of the molded part from the side. Through the bidirectional coordination of ejection and side pulling, the molded part is demolded synchronously, solving the problem that traditional single-direction demolding easily leads to deformation or jamming of the molded part. 2. During the mold closing process, when the upper mold moves downward, the guide rod is precisely inserted into the corresponding through hole and slides along the inner wall of the through hole. The cooperation between the guide rod and the through hole restricts the relative displacement of the upper and lower molds, ensuring that there is no offset between them in the horizontal direction. This allows the mold core to be precisely aligned with the cavity of the upper mold, ensuring the dimensional accuracy of the molded part. During demolding, the upper mold moves upward, and the guide rod slides synchronously along the through hole, guiding the upper and lower molds to separate smoothly, avoiding damage to the molded part or mold due to misalignment during the separation process. 3. In the mold-closed state, the pressure block presses the slider downward under the action of external driving force, causing the slider to drive the core to move towards the mold core. One end of the core extends into the mold core and together with the mold core, forms the cavity of the side structure of the molded part. 4. After the side-pulling mechanism completes the lateral pulling action, the return spring releases its elastic potential energy from the compressed state, generating a thrust towards the mold core and acting on the slider. Driven by the thrust of the return spring, the slider moves in the opposite direction of the mold core, simultaneously driving the core post to return to the initial working position, preparing for the next mold closing and forming, ensuring that the side-pulling mechanism can work stably in a cycle, and ensuring the matching accuracy of the core post and the mold core during each mold closing. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the lower mold of this utility model; Figure 4 This is a schematic diagram of the ejection mechanism of this utility model.

[0014] In the diagram: 1. Mold body; 2. Lower mold; 3. Upper mold; 4. Casting hole; 5. Corrosion-resistant layer; 6. Guide mechanism; 7. Through hole; 8. Guide rod; 9. Side pulling mechanism; 10. Mold core; 11. Ejection mechanism; 12. Mounting groove; 13. Core pillar; 14. Return spring; 15. Slider; 16. Fixing groove; 17. Pressure block; 18. Telescopic rod; 19. Ejector pin; 20. Top plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a bidirectional inclined ejector synchronous demolding mechanism includes a mold body 1; the mold body 1 is composed of a lower mold 2 and an upper mold 3, the lower mold 2 is located below the upper mold 3, a guide mechanism 6 is installed between the two sides of the upper mold 3 and the two sides of the lower mold 2, a mold core 10 is installed inside the lower mold 2, an installation groove 12 is provided inside the lower mold 2 below the mold core 10, an ejection mechanism 11 is installed inside the installation groove 12, a fixing groove 16 is provided inside the lower mold 2 on both sides of the mold core 10, a side-pulling mechanism 9 is installed inside the fixing groove 16, and a pouring hole 4 is installed at the middle position of the upper end of the upper mold 3.

[0017] The ejection mechanism 11 consists of a telescopic rod 18, a top plate 20, and ejector pins 19. The telescopic rod 18 is installed at the bottom of the mounting groove 12, and the top plate 20 is installed on the upper side of the telescopic rod 18. Ejector pins 19 are installed at the upper end of the top plate 20. The ejector pins 19 pass through the lower mold 2 and extend into the mold core 10. When the mold is completed and demolding is required, the telescopic rod 18 installed at the bottom of the mounting groove 12 receives a power signal and extends upward, pushing the top plate 20 at the upper end to rise synchronously. The top plate 20 drives the ejector pins 19 installed at its upper end to move upward. The ejector pins 19 pass through the reserved channel between the lower mold 2 and the mold core 10 and extend into the mold core 10, directly acting on the bottom of the molded part. Through the upward pushing force, the molded part is gradually ejected from the longitudinal cavity of the mold core 10, creating conditions for the lateral demolding of the subsequent side-pulling mechanism 9, and ensuring that the molded part is separated from the mold core 10 in the longitudinal direction.

[0018] The upper mold 3 and the lower mold 2 are provided with a corrosion-resistant layer 5 on their outer sides. The corrosion-resistant layer 5 is a chrome-plated layer. The chrome-plated layer has extremely high chemical stability and corrosion resistance, which can effectively isolate moisture, acid and alkali substances and corrosive residues that may be generated by the molding material in the working environment of the mold. At the same time, the surface of the chrome-plated layer is smooth and hard, which can reduce the adhesion between the mold and the molding material, reduce the difficulty of cleaning, extend the service life of the mold, and ensure that the structural accuracy of the mold and the surface quality of the molded parts are not affected by corrosion during long-term use.

[0019] The guiding mechanism 6 consists of guide rods 8 and through holes 7. The guide rods 8 are installed on both sides of the lower mold 3, and the through holes 7 are installed on both sides of the lower mold 2. The guide rods 8 are slidably installed inside the through holes 7. During the mold closing process, when the upper mold 3 moves downward, the guide rods 8 are precisely inserted into the corresponding through holes 7 and slide along the inner wall of the through holes 7. The relative displacement of the upper mold 3 and the lower mold 2 is limited by the cooperation between the guide rods 8 and the through holes 7, ensuring that there is no offset between the two in the horizontal direction, so that the mold core 10 is precisely aligned with the cavity of the upper mold 3, ensuring the dimensional accuracy of the molded part. During demolding, the upper mold 3 moves upward, and the guide rods 8 slide synchronously along the through holes 7, guiding the upper mold 3 and the lower mold 2 to separate smoothly, avoiding damage to the molded part or the mold due to misalignment during the separation process.

[0020] The side-pulling mechanism 9 consists of a core pillar 13, a slider 15, and a pressure block 17. The pressure block 17 is slidably installed inside the fixed groove 16, and the slider 15 is slidably installed inside the fixed groove 16 at the bottom of the pressure block 17. The core pillar 13 is installed on one side of the slider 15, and one end of the core pillar 13 extends into the mold core 10. In the mold-closed state, the pressure block 17 presses the slider 15 downward under the action of external driving force, causing the slider 15 to drive the core pillar 13 to move towards the mold core 10. One end of the core pillar 13 extends into the mold core 10, and together with the mold core 10, they form the cavity of the side structure of the molded part, such as protrusions and grooves. A return spring 14 is fitted on the outside of the core pillar 13. The return spring 14 is installed inside the fixed groove 16. After the side pulling mechanism 9 completes the lateral pulling action, the return spring 14 releases elastic potential energy from the compressed state, generating a pushing force in the direction of the mold core 10 and acting on the slider 15. The slider 15 moves in the opposite direction of the mold core 10 under the push of the return spring 14, and simultaneously drives the core pillar 13 to return to the initial working position, preparing for the next mold closing and forming, ensuring that the side pulling mechanism 9 can work stably in cycles, and ensuring the fitting accuracy of the core pillar 13 and the mold core 10 during each mold closing.

[0021] The working principle and usage process of this utility model are as follows: When the mold is closed, the guide mechanism 6 ensures that the upper mold 3 and the lower mold 2 are precisely aligned to avoid misalignment affecting the molding accuracy; the molten material is injected through the pouring hole 4 at the upper end of the upper mold 3 and cooled and formed in the cavity defined by the mold core 10 inside the lower mold 2. During the demolding stage, the ejection mechanism 11 below the mold core 10 inside the lower mold 2 is responsible for pushing the molded part upward from the bottom, while the side pulling mechanism 9 in the fixing grooves 16 on both sides of the mold core 10 simultaneously pulls away the side structure of the molded part from the side. Through the bidirectional coordination of ejection and side pulling, the molded part is demolded synchronously, solving the problem that traditional single-direction demolding easily leads to deformation or jamming of the molded part.

[0022] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bidirectional inclined ejector synchronous demolding mechanism, comprising a mold body (1); characterized in that: The mold body (1) is composed of a lower mold (2) and an upper mold (3). The lower mold (2) is located below the upper mold (3). A guide mechanism (6) is installed between the two sides of the upper mold (3) and the two sides of the lower mold (2). A mold core (10) is installed inside the lower mold (2). An installation groove (12) is provided inside the lower mold (2) below the mold core (10). An ejection mechanism (11) is installed inside the installation groove (12). A fixing groove (16) is provided inside the lower mold (2) on both sides of the mold core (10). A side-pulling mechanism (9) is installed inside the fixing groove (16). A pouring hole (4) is installed at the middle position of the upper end of the upper mold (3).

2. The bidirectional inclined ejector synchronous demolding mechanism according to claim 1, characterized in that: The ejection mechanism (11) consists of a telescopic rod (18), a top plate (20) and an ejector pin (19). The telescopic rod (18) is installed at the bottom of the mounting groove (12). The top plate (20) is installed on the upper side of the telescopic rod (18). An ejector pin (19) is installed on the upper end of the top plate (20). The ejector pin (19) passes through the lower mold (2) and extends into the mold core (10).

3. The bidirectional inclined ejector synchronous demolding mechanism according to claim 1, characterized in that: The upper mold (3) and the lower mold (2) are provided with a corrosion-resistant layer (5) on their outer sides, and the corrosion-resistant layer (5) is a chromium-plated layer.

4. The bidirectional inclined ejector synchronous demolding mechanism according to claim 1, characterized in that: The guiding mechanism (6) consists of a guide rod (8) and a through hole (7). The guide rod (8) is installed on both sides of the lower mold (3), and the through hole (7) is installed on both sides of the lower mold (2). The guide rod (8) is slidably installed inside the through hole (7).

5. The bidirectional inclined ejector synchronous demolding mechanism according to claim 1, characterized in that: The side-pulling mechanism (9) consists of a core column (13), a slider (15) and a pressure block (17). The pressure block (17) is slidably installed inside the fixed groove (16). The slider (15) is slidably installed inside the fixed groove (16) at the bottom of the pressure block (17). The core column (13) is installed on one side of the slider (15), and one end of the core column (13) extends into the mold core (10).

6. The bidirectional inclined ejector synchronous demolding mechanism according to claim 5, characterized in that: A reset spring (14) is fitted on the outside of the core column (13), and the reset spring (14) is installed inside the fixing groove (16).

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