Mould locking mechanism for injection molding of plastic part

Abstract

The utility model provides a plastic part injection molding mould locking mechanism, including base, four electric lifting rod, injection molding upper mould and injection molding lower mould, the both sides of base top are both fixedly connected with the bearing plate, the fixed plate is fixedly connected between the top of two bearing plate, injection molding lower mould is placed on the top of base, the fixed plate is fixed on the fixed plate, the fixed plate is fixed on the fixed plate, the fixed plate is fixed on the fixed plate. Compared with the prior art, the double-side mold locking device has the following beneficial effects that the electric push rod is started to push the two double-side mold locking assemblies to be close to each other, and the electric lead screws in the double-side mold locking assemblies are started to adjust the distance between the two right-angle seats; the four sides of the splicing position of the lower injection mold and the upper injection mold can be clamped by adjusting the distance between the two right-angle bases in the two double-side mold locking assemblies, precise mold locking can be conducted after the plastic part injection mold is spliced, the phenomenon that the upper mold and the lower mold deviate is avoided, and therefore the plastic part injection machining quality is effectively improved.

Description

Technical Field

[0001] The utility model relates to a mold locking mechanism for plastic part injection molding, belonging to the field of plastic part injection molding equipment. 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. The working principle of the injection molding machine is to inject the plasticized molten state, i.e., viscous flow state, into the closed mold cavity with the help of the thrust of the screw or plunger. The mold closing action is achieved by pneumatic or hydraulic driving. However, after the movable mold and the fixed mold have worked for a long time, the clamping state will be unsatisfactory, so a locking mechanism is installed at the connection of the injection mold for reinforcement.

[0003] In the prior art, hydraulic locks are installed on both sides of the lower mold of the injection mold. When the upper mold and the lower mold are closed, the hydraulic cylinder inside the hydraulic lock is started to push the lock to move, and then the two sides of the upper mold and the two sides of the lower mold can be fixed. However, the locking mechanism can only lock and fix the two sides of the mold, and cannot lock and fix the front and rear positions after the upper and lower molds are closed, which makes the mold prone to front and rear deviation, thereby reducing the injection molding quality of plastic parts.

[0004] In summary, the utility model therefore provides a clamping mechanism for plastic part injection molding to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a locking mechanism for plastic part injection molding to solve the problem in the above-mentioned background technology that the mold cannot be locked and fixed from four sides at the same time.

[0006] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a locking mechanism for injection molding of plastic parts, including a base and four electric lifting rods, an upper injection mold and a lower injection mold, both sides of the top of the base are fixedly connected with load-bearing plates, a fixed plate is fixedly connected between the tops of the two load-bearing plates, the lower injection mold is placed on the top of the base, the four electric lifting rods are fixedly connected to the bottom of the fixed plate, the upper injection mold is fixedly connected between the output ends of the four electric lifting rods and is located at the top of the lower injection mold, four electric push rods are fixedly connected to the opposite sides of the two load-bearing plates, an installation frame is fixedly connected between the output ends of each four electric push rods, and a double-sided locking assembly is installed on the opposite sides of the two installation frames.

[0007] Furthermore, the top of the lower injection mold and the bottom of the upper injection mold are embedded in each other, and the two double-sided clamping components are installed in a mirror-symmetrical structure.

[0008] Furthermore, the top and the bottom of the installation frame are both open, and the opposite sides of the two installation frames are both open.

[0009] Furthermore, the double-sided clamping assembly includes an electric screw, which is rotatably connected between two sides of the inner wall of the mounting frame, and movable blocks are sleeved on both sides of the electric screw surface and on one side of the inner wall of the mounting frame, and the two movable blocks are fixedly connected to connecting blocks on one side away from the mounting frame, and the two connecting blocks are fixedly connected to right-angle seats on one side away from the movable blocks.

[0010] Furthermore, the two right-angle seats are installed in a mirror-symmetrical structure, and right-angle grooves are provided on opposite sides of the two right-angle seats.

[0011] Furthermore, the two movable blocks are both slidably connected to one side of the inner wall of the installation frame, and a sliding groove cooperating with the sliding connection of the two movable blocks is provided on one side of the inner wall of the installation frame.

[0012] Furthermore, the two movable blocks are both threadedly connected to the electric lead screw, and the slide groove on one side of the inner wall of the installation frame has a limiting effect on the two movable blocks.

[0013] Beneficial effects of the utility model:

[0014] By starting the electric push rod, pushing the two double-sided clamping assemblies closer together, and starting the electric lead screw inside the double-sided clamping assemblies, the distance between the two right-angle seats is adjusted. The distance adjustment of the two right-angle seats inside the two double-sided clamping assemblies can clamp the four sides of the joint between the lower injection mold and the upper injection mold, so that the plastic part injection mold can be accurately clamped after splicing, and there will be no upper and lower mold offset, thereby effectively improving the injection molding quality of plastic parts.

[0015] The distance between the two double-sided clamping components and the distance between the two inner right-angle seats can be flexibly adjusted according to the size of the injection mold of the plastic part to be clamped, thereby effectively expanding the adaptation range of the clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a schematic structural stereogram of a mold clamping mechanism for plastic part injection molding of the utility model;

[0018] Figure 2 This is a schematic front view of the structure of a mold clamping mechanism for plastic part injection molding of the utility model;

[0019] Figure 3This is a main cross-sectional view showing the structure of a mold clamping mechanism for plastic part injection molding according to the utility model;

[0020] Figure 4 for Figure 1 The schematic top view of the structure of the double-sided clamping assembly shown;

[0021] Figure 5 for Figure 1 The structure of the double-sided clamping assembly is schematically shown in a top cross-sectional view.

[0022] In the figure: 1. base; 2. load-bearing plate; 3. fixed plate; 4. electric lifting rod; 5. injection molding upper mold; 6. injection molding lower mold; 7. electric push rod; 8. installation frame; 9. double-sided clamping assembly; 91. electric lead screw; 92. movable block; 93. connecting block; 94. right-angle seat. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] See also Figure 1-5 The utility model provides a technical solution: a locking mechanism for plastic part injection molding, comprising a base 1 and four electric lifting rods 4, an injection upper mold 5 and an injection lower mold 6, both sides of the top of the base 1 are fixedly connected with a load-bearing plate 2, a fixed plate 3 is fixedly connected between the tops of the two load-bearing plates 2, the injection lower mold 6 is placed on the top of the base 1, the four electric lifting rods 4 are fixedly connected to the bottom of the fixed plate 3, the injection upper mold 5 is fixedly connected between the output ends of the four electric lifting rods 4 and is located at the top of the injection lower mold 6, and the opposite sides of the two load-bearing plates 2 are fixed Four electric push rods 7 are connected, and a mounting frame 8 is fixedly connected between the output ends of each of the four electric push rods 7. Double-sided clamping assemblies 9 are installed on the opposite sides of the two mounting frames 8. The four electric lifting rods 4 are connected to an external power supply and are provided with the same power control switch. The top of the injection lower mold 6 and the bottom of the injection upper mold 5 are embedded with each other. The two double-sided clamping assemblies 9 are installed in a mirror-symmetrical structure. The top and bottom of the mounting frame 8 are both open, and the opposite sides of the two mounting frames 8 are both open. The electric push rods 7 are connected to an external power supply and are provided with a power control switch.

[0025] See also Figure 3-5The double-sided clamping assembly 9 includes an electric lead screw 91, which is rotatably connected between the two sides of the inner wall of the mounting frame 8. Both sides of the lead screw 91 and one side of the inner wall of the mounting frame 8 are sleeved with movable blocks 92. The two movable blocks 92 are fixedly connected with connecting blocks 93 on the side away from the mounting frame 8. The two connecting blocks 93 are fixedly connected with right-angle seats 94 on the side away from the movable blocks 92. The electric lead screw 91 is a device that converts electrical energy into mechanical energy and is commonly used in linear motion control systems. It consists of a motor and a lead screw. The electric lead screw 91 is driven to rotate by the motor, so that the two movable blocks 92 can perform linear motion on the lead screw.

[0026] See also Figure 3-5 The two right-angle seats 94 are installed in a mirror-symmetrical structure, and the opposite sides of the two right-angle seats 94 are provided with right-angle grooves. After the lower injection mold 6 and the upper injection mold 5 are spliced ​​up and down, the right-angle groove of the right-angle seat 94 can be used to clamp the two sides of the right angle of the splicing of the lower injection mold 6 and the upper injection mold 5 through a right-angle groove of the right-angle seat 94, so that the two sides of the right-angle groove of the right-angle seat 94 can clamp the two sides of the right angle of the splicing of the lower injection mold 6 and the upper injection mold 5. The spacing adjustment of the two right-angle seats 94 inside the two double-sided clamping assemblies 9 can clamp the four sides of the splicing of the lower injection mold 6 and the upper injection mold 5, so that the plastic part injection mold can be accurately clamped after splicing, and there will be no upper and lower mold offset.

[0027] See also Figure 3-5 , the two movable blocks 92 are both slidably connected to one side of the inner wall of the mounting frame 8, and a sliding groove is provided on one side of the inner wall of the mounting frame 8 to cooperate with the sliding connection of the two movable blocks 92. The two movable blocks 92 are both threadedly connected to the electric lead screw 91, and the sliding groove on one side of the inner wall of the mounting frame 8 has a limiting effect on the two movable blocks 92. The internal screw of the electric lead screw 91 is a bidirectional threaded lead screw, and the thread directions of the two movable blocks 92 are opposite. When the electric lead screw 91 rotates clockwise, it can drive the two movable blocks 92 to move closer to each other on one side of the inner wall of the mounting frame 8. When the electric lead screw 91 rotates counterclockwise, it can drive the two movable blocks 92 to move away from each other on one side of the inner wall of the mounting frame 8.

[0028] Specific implementation method: by placing the lower injection mold 6 on the top of the base 1, and between the opposite sides of the two double-sided clamping assemblies 9 and directly below the upper injection mold 5, starting the four electric lifting rods 4, pushing the upper injection mold 5 to move downward and splice with the top of the lower injection mold 6, and then starting the electric push rod 7 on the opposite side of the load-bearing plate 2 to push the two double-sided clamping assemblies 9 closer to each other, so that one side of the inner wall of the right-angle groove of the two right-angle seats 94 inside the two double-sided clamping assemblies 9 is respectively in contact with the left and right sides of the splicing of the lower injection mold 6 and the upper injection mold 5, so that the lower injection mold 6 and the upper injection mold 5 can be pushed to adjust and calibrate left and right, and then the electric lead screws 91 in the two double-sided clamping assemblies 9 are started to move The clockwise rotation can drive the two movable blocks 92 to move closer to each other on one side of the inner wall of the installation frame 8, thereby shortening the distance between the two right-angle seats 94, so that the other sides of the right-angle grooves on the two right-angle seats 94 inside the two double-sided clamping components 9 are respectively in contact with the front and rear sides of the joint of the lower injection mold 6 and the upper injection mold 5, so that the lower injection mold 6 and the upper injection mold 5 can be pushed to adjust forward and backward. The spacing adjustment of the two right-angle seats 94 inside the two double-sided clamping components 9 can clamp the four sides of the joint of the lower injection mold 6 and the upper injection mold 5, so that the plastic part injection mold can be accurately clamped after splicing, and there will be no upper and lower mold offset, thereby effectively improving the injection molding processing quality of plastic parts.

[0029] The distance between the two double-sided clamping components 9 and the distance between the two inner right-angle seats 94 can be flexibly adjusted according to the size of the injection mold of the plastic part to be clamped, thereby effectively expanding the adaptability range of the clamping mechanism.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mold clamping mechanism for plastic part injection molding, comprising a base (1), four electric lifting rods (4), an upper injection mold (5), and a lower injection mold (6), characterized in that: The two sides of the top of the base (1) are fixedly connected with a load-bearing plate (2), the tops of the two load-bearing plates (2) are fixedly connected with a fixed plate (3), the lower injection mold (6) is placed on the top of the base (1), the four electric lifting rods (4) are fixedly connected to the bottom of the fixed plate (3), the upper injection mold (5) is fixedly connected between the output ends of the four electric lifting rods (4) and is located on the top of the lower injection mold (6), the opposite side of the two load-bearing plates (2) are fixedly connected with four electric push rods (7), the output ends of each of the four electric push rods (7) are fixedly connected with a mounting frame (8), and the opposite sides of the two mounting frames (8) are installed with a double-sided clamping assembly (9).

2. A clamping mechanism for plastic part injection molding according to claim 1, characterized in that: The top of the lower injection mold (6) and the bottom of the upper injection mold (5) are embedded in each other, and the two double-sided clamping components (9) are installed in a mirror-symmetrical structure.

3. The clamping mechanism for plastic part injection molding according to claim 1, characterized in that: The top and bottom of the installation frame (8) are both open, and the opposite sides of the two installation frames (8) are both open.

4. The clamping mechanism for plastic part injection molding according to claim 1, characterized in that: The double-sided mold locking assembly (9) comprises an electric lead screw (91), the electric lead screw (91) being rotatably connected between two sides of the inner wall of the mounting frame (8), movable blocks (92) being sleeved on both sides of the lead screw (91) and located on one side of the inner wall of the mounting frame (8), the two movable blocks (92) being fixedly connected to a connecting block (93) on one side away from the mounting frame (8), and the two connecting blocks (93) being fixedly connected to a right-angle seat (94) on one side away from the movable block (92).

5. A clamping mechanism for plastic part injection molding according to claim 4, characterized in that: The two right-angle seats (94) are installed in a mirror-symmetrical structure, and right-angle grooves are provided on opposite sides of the two right-angle seats (94).

6. A clamping mechanism for plastic part injection molding according to claim 4, characterized in that: The two movable blocks (92) are both slidably connected to one side of the inner wall of the installation frame (8), and one side of the inner wall of the installation frame (8) is provided with a sliding groove that cooperates with the sliding connection of the two movable blocks (92).

7. A clamping mechanism for plastic part injection molding according to claim 4, characterized in that: The two movable blocks (92) are both threadedly connected to the electric lead screw (91), and the slide groove on one side of the inner wall of the installation frame (8) has a limiting effect on the two movable blocks (92).

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