Injection molding clamping mechanism

Abstract

The utility model belongs to the technical field of injection molding, and particularly relates to an injection molding mold closing mechanism which comprises a base, a hot melting conveying mechanism is arranged on one side of the upper surface of the base, a mold base is fixed to the other side of the upper surface of the base, rail rods are vertically arranged on the outer sides of the four corners of the top of the mold base, and a top plate is fixed to the tops of the four rail rods. The top plate is arranged above the mold base, the fixed mold is mounted on the upper surface of the mold base, the hydraulic cylinder is fixed to the center of the top of the top plate, the mounting plate is fixed to the output end of the hydraulic cylinder, and the sliding plates are symmetrically arranged at the two ends of the mounting plate. During mold closing, the spraying pipe can be driven by an internal mechanism to stretch across the mold cavity from front to back, a release agent is sprayed to the interior of the mold cavity, the spraying pipe is arranged on the rear side of the fixed mold during complete mold closing, otherwise, the spraying pipe returns during mold opening, and then the effect of automatically spraying the release agent is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding, and in particular relates to an injection molding clamping mechanism. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. Injection molding machines can be divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it eject and fill the mold cavity. The injection molding machine usually has two molds, one of which is fixed and the other is movable. The clamping structure drives the movable mold to realize the opening and closing movement, and the two molds are opened and closed.

[0003] After injection molding, the molds are separated and then demolded. After demolding, the mold cavity is exposed. At this time, it is necessary to manually spray the mold cavity with a mold release agent to facilitate demolding after the next molding. However, manually spraying the mold release agent each time not only increases the labor intensity of the staff, but may also cause the mold to be unable to be demolded due to forgetting to spray, affecting production. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide an injection mold clamping mechanism, which can drive the nozzle to cross over the mold cavity when opening and closing the mold, so as to automatically spray the mold cavity with a demoulding machine.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A mold clamping mechanism for injection molding comprises a base, a hot melt conveying mechanism is arranged on one side of the upper surface of the base, and a mold base is fixed on the other side of the upper surface of the base, track rods are vertically arranged on the outer sides of the four corners of the top of the mold base, a top plate is fixed on the top of the four track rods, the top plate is placed above the mold base, a fixed mold is installed on the upper surface of the mold base, a hydraulic cylinder is fixed on the top center of the top plate, a mounting plate is fixed on the output end of the hydraulic cylinder, slide plates are symmetrically arranged at both ends of the mounting plate, two of the slide plates slide on the surfaces of two track rods on the same side respectively, a movable mold is arranged on the lower surface of the mounting plate, the movable mold is placed above the fixed mold, and the two correspond to each other, mounting boxes are symmetrically arranged on both sides of the mold base, a rotating shaft is installed on the inner side of the mounting box through a bearing, a swing rod is arranged on the surface of the rotating shaft, the swing rod passes through the upper surface of the mounting box, and a nozzle is horizontally arranged between the ends of the two swing rods away from the rotating shaft.

[0007] Furthermore, one end of the nozzle is connected to the demoulding machine storage device through a hose, and nozzles are evenly arranged on the lower center surface of the nozzle, and multiple nozzles correspond to the mold cavities on the upper surface of the fixed mold.

[0008] Furthermore, a gear is provided on the surface of the rotating shaft, the gear is placed inside the mounting box, and the gear is placed outside the swing rod.

[0009] Furthermore, a sliding hole is vertically opened at the lower rear side of the installation box, a sliding block is slidably installed inside the sliding hole, a gear rod is arranged on the top of the sliding block, and the gear rod is meshed with the gear.

[0010] Furthermore, a spring is arranged inside the sliding hole, and the top of the spring is in contact with the lower surface of the sliding block.

[0011] Furthermore, an adjusting screw is screwed on the top of the gear rod, an extrusion head is arranged on the top of the adjusting screw, and the extrusion head is placed below the center of the slide plate.

[0012] Furthermore, the output end of the hot melt conveying mechanism is connected to the internal mold cavity of the fixed mold.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the nozzle is connected to the release agent storage device, and high-pressure release agent is injected into the inside of the nozzle through a water pump; when the mold is closed, the nozzle can be driven by the internal mechanism to cross the mold cavity from front to back, and spray the release agent on the inside of the mold cavity; when the mold is completely closed, the nozzle is placed on the rear side of the fixed mold; conversely, when the mold is opened, the nozzle returns to its position, thereby realizing the effect of automatically spraying the release agent and reducing the labor intensity of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic cross-sectional structural diagram of the installation box of the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the movable mold installation of the utility model;

[0017] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure of area A.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Base; 2. Hot melt conveying mechanism; 3. Die base; 4. Track rod; 5. Top plate; 6. Fixed die; 7. Hydraulic cylinder; 8. Mounting plate; 9. Slide plate; 10. Moving die; 11. Mounting box; 12. Rotating shaft; 13. Gear; 14. Swing rod; 15. Nozzle; 16. Slide hole; 17. Sliding block; 18. Spring; 19. Gear rod; 20. Adjusting screw; 21. Extrusion head. DETAILED DESCRIPTION

[0020] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0021] Please refer to Figure 1-Figure 4 As shown, an injection molding mechanism comprises a base 1, a hot melt conveying mechanism 2 is arranged on one side of the upper surface of the base 1, and a mold base 3 is fixed on the other side of the upper surface of the base 1, track rods 4 are vertically arranged on the outer sides of the four corners of the top of the mold base 3, top plates 5 are fixed on the tops of the four track rods 4, the top plates 5 are placed above the mold base 3, a fixed mold 6 is installed on the upper surface of the mold base 3, the output end of the hot melt conveying mechanism 2 is connected with the internal mold cavity of the fixed mold 6, so that the raw material in the molten state can be injected into the mold cavity when the mold is closed, so as to realize injection molding, a hydraulic cylinder 7 is fixed at the top center of the top plate 5, a mounting plate 8 is fixed on the output end of the hydraulic cylinder 7, slide plates 9 are symmetrically arranged at both ends of the mounting plate 8, and the two slide plates 9 slide on the surfaces of the two track rods 4 on the same side respectively, so as to ensure that the mounting plate 8 can only move in the vertical direction, so as to ensure the stability of the up and down movement of the fixed mold 6, a movable mold 10 is arranged on the lower surface of the mounting plate 8, the movable mold 10 is placed above the fixed mold 6, and the two correspond to each other to realize the opening and closing of the mold.

[0022] Please refer to Figure 1-Figure 4 As shown, installation boxes 11 are symmetrically arranged on both sides of the mold base 3, and the top of the installation box 11 is open on one side close to the mold base 3. A rotating shaft 12 is installed on the inner side of the installation box 11 through a bearing. A swing rod 14 is arranged on the surface of the rotating shaft 12. The swing rod 14 passes through the upper surface of the installation box 11, and a nozzle 15 is horizontally arranged between the ends of the two swing rods 14 away from the rotating shaft 12. The nozzle 15 can swing along the axis of the rotating shaft 12 so that the nozzle 15 can cross over the top of the mold cavity.

[0023] Among them, one end of the nozzle 15 is connected to the demoulding machine storage device through a hose, and high-pressure demoulding agent liquid is injected into the nozzle 15 through a pump body and controlled by a control valve. Nozzles are evenly arranged on the lower center surface of the nozzle 15, and multiple nozzles correspond to the mold cavity on the upper surface of the fixed mold 6. When the nozzle is placed just above the mold cavity, it is turned on to realize automatic spraying of the demoulding agent.

[0024] Please refer to Figure 2 and Figure 4 As shown, a gear 13 is provided on the surface of the rotating shaft 12, and the gear 13 is placed inside the installation box 11, and the gear 13 is placed outside the swing rod 14. A sliding hole 16 is vertically opened at the lower rear side of the installation box 11, and a slider 17 is slidably installed inside the sliding hole 16. A gear rod 19 is provided on the top of the slider 17, and the gear rod 19 and the gear 13 are meshed with each other. The matching direction of the two is to ensure that the nozzle 15 can just cross from the front end to the rear end of the fixed mold 6 when the mold is closed.

[0025] Among them, a spring 18 is arranged inside the sliding hole 16, and the top of the spring 18 is in contact with the lower surface of the slider 17. The elastic force of the spring 18 allows the nozzle 15 to swing from back to front when the mold is opened, so as to facilitate one-stage injection molding. The nozzle will only be opened when the nozzle 15 moves from front to back to prevent it from not opening. The nozzle is controlled by a controller and a sensor. An adjusting screw 20 is screwed on the top of the gear rod 19, and an extrusion head 21 is arranged on the top of the adjusting screw 20. The extrusion head 21 is placed below the center of the slide plate 9, and then the height of the extrusion head 21 can be adjusted to facilitate the adjustment of the movement distance between the various mechanisms.

[0026] The working principle of the utility model is as follows: the raw material is placed inside the barrel of the hot melt conveying mechanism 2 for heating and conveying, the hydraulic cylinder 7 at the top is used to control the mounting plate 8 to move up and down, and then the opening and closing of the movable mold 10 and the fixed mold 6 are controlled, the slide plate 9 slides on the surface of the track rod 4 to ensure the stability of the movable mold 10 moving up and down, and the raw material in the molten state is injected into the mold cavity when the mold is closed, and the mold is formed after cooling. At the same time, due to the existence of the spring 18, the slider 17 has an upward force, and then the gear rod 19 is placed at the top of the stroke. At this time, the nozzle 15 is placed in front of the fixed mold 6, so During the downward movement of the mold 10, the extrusion head 21 can be extruded to move the gear rod 19 downward, and the gear rod 19 and the gear 13 are meshed with each other to drive the rotating shaft 12 to rotate, so that the swing rod 14 rotates clockwise. At this time, the nozzle 15 can cross over the top of the fixed mold 6, and spray the demolding machine on the mold cavity inside the fixed mold 6 through the nozzle at the bottom. When the movable mold 10 and the fixed mold 6 are closed, the nozzle 15 is placed on the rear side of the fixed mold 6 without affecting the closing of the mold. On the contrary, when the mold is opened, the elastic force of the spring 18 is used to move the gear rod 19 upward, and then the nozzle 15 returns to the front side of the fixed mold 6 to facilitate the injection molding of the next side.

[0027] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An injection molding clamping mechanism, comprising a base (1), a hot melt conveying mechanism (2) being arranged on one side of the upper surface of the base (1), and a mold base (3) being fixed on the other side of the upper surface of the base (1), characterized in that: Track rods (4) are vertically arranged on the outer sides of the four corners of the top of the mold base (3), and top plates (5) are fixed on the tops of the four track rods (4). The top plates (5) are placed above the mold base (3), and a fixed mold (6) is installed on the upper surface of the mold base (3). A hydraulic cylinder (7) is fixed at the top center of the top plate (5), and a mounting plate (8) is fixed at the output end of the hydraulic cylinder (7). Slide plates (9) are symmetrically arranged at both ends of the mounting plate (8), and the two slide plates (9) slide on the surfaces of the two track rods (4) on the same side, respectively. The lower surface of the mounting plate (8) is provided with a movable mold (10), the movable mold (10) is placed above the fixed mold (6), and the two correspond to each other, the two sides of the mold base (3) are symmetrically provided with mounting boxes (11), the inner side of the mounting box (11) is provided with a rotating shaft (12) through a bearing, the surface of the rotating shaft (12) is provided with a swing rod (14), the swing rod (14) passes through the upper surface of the mounting box (11), and a nozzle (15) is transversely arranged between the ends of the two swing rods (14) away from the rotating shaft (12).

2. The injection mold clamping mechanism according to claim 1, characterized in that: One end of the nozzle (15) is connected to the demoulding machine storage device through a hose, and nozzles are evenly arranged on the lower center surface of the nozzle (15), and a plurality of the nozzles correspond to the mold cavities on the upper surface of the fixed mold (6).

3. The injection mold clamping mechanism according to claim 2, characterized in that: A gear (13) is provided on the surface of the rotating shaft (12), the gear (13) is placed inside the installation box (11), and the gear (13) is placed outside the swing rod (14).

4. The injection mold clamping mechanism according to claim 3, characterized in that: A sliding hole (16) is vertically opened at the lower rear side of the installation box (11), a sliding block (17) is slidably installed inside the sliding hole (16), a gear rod (19) is arranged on the top of the sliding block (17), and the gear rod (19) is meshed with the gear (13).

5. The injection mold clamping mechanism according to claim 4, characterized in that: A spring (18) is arranged inside the sliding hole (16), and the top of the spring (18) is in contact with the lower surface of the sliding block (17).

6. The injection mold clamping mechanism according to claim 5, characterized in that: An adjusting screw rod (20) is screwed onto the top of the gear rod (19), an extrusion head (21) is arranged on the top of the adjusting screw rod (20), and the extrusion head (21) is placed below the center of the slide plate (9).

7. The injection mold clamping mechanism according to claim 1, characterized in that: The output end of the hot melt conveying mechanism (2) is connected to the internal mold cavity of the fixed mold (6).

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