Locking mechanism for injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a locking mechanism for an injection mold, which comprises a bottom mold, a top mold and a top plate, the bottom surface of the top plate is provided with two connecting pieces, the two connecting pieces are connected with the top mold, the two sides of the bottom mold are fixedly provided with mounting frames, the two sides of the top mold are provided with clamping grooves, and the clamping grooves are connected with the top mold. Locking assemblies are arranged on the two mounting frames correspondingly, and fixing assemblies are arranged on the top mold and the top plate jointly. According to the utility model, the requirement of manually locking the mold is eliminated, the time and the cost of manual intervention are reduced, and the mechanism can automatically lock the bottom mold and the top mold in the injection molding process, so that the production efficiency is improved, the downtime of a production line is reduced, and the overall production automation degree is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a locking mechanism for an injection mold. Background Art

[0002] Injection molds usually need to use a locking mechanism to ensure that the mold remains in a stable closed state during the injection process. The main function of the locking mechanism is to maintain the positioning and fixation of the mold, preventing the mold from opening, closing, or moving during the injection process, thereby ensuring the quality and accuracy of the product.

[0003] In the prior art, the locking of the mold is generally manually operated, that is, the operator uses locking tools such as positioning pins to lock the upper and lower molds. The locking of the mold usually requires the operator to forcefully insert the locking tools such as positioning pins into the corresponding positions, which requires a certain amount of physical strength and labor intensity. For large and heavy molds, the operator may need to bear a large physical load, resulting in an increase in labor intensity and an increase in potential work safety risks. In addition, the manual operation of mold locking usually takes a long time. Especially in the case of complex mold structures or large-scale production, the operator needs to perform locking operations separately and needs to wait to ensure that each positioning pin or locking tool is correctly locked, which will increase the downtime of the production line and reduce production efficiency.

[0004] Therefore, it is necessary to design a locking mechanism for an injection mold to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a locking mechanism for an injection mold.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A locking mechanism for an injection mold, including a bottom mold and a top mold, further including a top plate. Two connecting pieces are arranged on the bottom surface of the top plate, and both of the two connecting pieces are connected to the top mold. Mounting frames are fixed on both sides of the bottom mold, clamping grooves are formed on both sides of the top mold, locking components are arranged on both of the two mounting frames, and a fixing component is jointly arranged on the top mold and the top plate.

[0008] As a preferred technical solution of the present utility model, the locking assembly includes a sealing cylinder, a sliding plug, a plurality of through holes, a spring, a connecting rod and a clamping block. The sealing cylinder is fixed on the mounting frame. The sliding plug is hermetically and slidably connected to the inner surface of the sealing cylinder. A plurality of the through holes are all opened on the sliding plug. One end of the spring is connected to the inner surface of the sealing cylinder, and the other end is connected to the sliding plug. One end of the connecting rod is fixedly connected to the sliding plug, and the other end extends to the outside of the sealing cylinder. The clamping block is fixed at one end of the connecting rod located outside the sealing cylinder. Inclined surfaces are provided on both the top surface and the bottom surface of the clamping block.

[0009] As a preferred technical solution of the present utility model, the fixing assembly includes two conductive coils, a trigger rod, a push-button switch and electrorheological fluid. The two conductive coils are respectively sleeved on the two sealing cylinders. The trigger rod is fixed on the top plate. The push-button switch is installed on the top surface of the top mold, and the trigger rod and the push-button switch are arranged opposite to each other. The electrorheological fluid is filled inside the two sealing cylinders.

[0010] As a preferred technical solution of the present utility model, the connecting member includes an outer cylinder, an inner rod and a return spring. The outer cylinder is fixed on the bottom surface of the top plate. The inner rod is slidably connected inside the outer cylinder. One end of the inner rod extends to the outside of the outer cylinder and is fixedly connected to the top mold. One end of the return spring is connected to the outer cylinder, and the other end is connected to the inner rod.

[0011] As a preferred technical solution of the present utility model, the shape of the card slot is adapted to the shape of the clamping block.

[0012] As a preferred technical solution of the present utility model, the conductive coil is in a spiral structure.

[0013] The present utility model has the following beneficial effects:

[0014] 1. The automatic locking mechanism eliminates the need for manual operation of locking the mold, reduces the time and cost of manual intervention. The mechanism can automatically complete the locking of the bottom mold and the top mold during the injection molding process, thereby improving production efficiency, reducing the downtime of the production line, and increasing the overall production automation level. In addition, the automatic locking mechanism can avoid possible operation errors and safety risks during manual operation. When manually locking the mold, there are risks of improper operation, dangerous operation or operation mistakes, while using the automatic locking mechanism can reduce these potential risks and provide a safer working environment for the staff;

[0015] 2. When the trigger rod contacts the push-button switch, it activates the energization of the conductive coil and the "solidification" of the electrorheological fluid, which fixes the position of the clamping block and the position of the sliding plug, preventing displacement and position change caused by vibration or other factors during the injection molding process, and ensuring the stability and reliability of the mold. Description of the Drawings

[0016] Figure 1 Structural schematic diagram of a locking mechanism for an injection mold proposed by the present utility model;

[0017] Figure 2 is Figure 1 Enlarged view of the structure at A of

[0018] In the figure: 1 bottom mold, 2 top mold, 3 top plate, 4 connecting member, 5 mounting bracket, 6 card slot, 71 sealing cylinder, 72 sliding plug, 73 through hole, 74 spring, 75 connecting rod, 76 clamping block, 81 conductive coil, 82 trigger rod, 83 push-button switch. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0020] Referring to Figure 1-2 , a locking mechanism for an injection mold includes a bottom mold 1 and a top mold 2, and further includes a top plate 3. Two connecting members 4 are provided on the bottom surface of the top plate 3, and both two connecting members 4 are connected to the top mold 2. The connecting member 4 includes an outer cylinder, an inner rod and a return spring. The outer cylinder is fixed on the bottom surface of the top plate 3, the inner rod is slidably connected inside the outer cylinder, one end of the inner rod extends to the outside of the outer cylinder and is fixed to the top mold 2, one end of the return spring is connected to the outer cylinder, and the other end is connected to the inner rod. Mounting brackets 5 are fixed on both sides of the bottom mold 1, and card slots 6 are provided on both sides of the top mold 2.

[0021] Locking components are provided on both two mounting brackets 5. The locking components include a sealing cylinder 71, a sliding plug 72, a plurality of through holes 73, a spring 74, a connecting rod 75 and a clamping block 76. The sealing cylinder 71 is fixed on the mounting bracket 5, the sliding plug 72 is hermetically and slidably connected to the inner surface of the sealing cylinder 71, a plurality of through holes 73 are provided on the sliding plug 72, one end of the spring 74 is connected to the inner surface of the sealing cylinder 71, and the other end is connected to the sliding plug 72. One end of the connecting rod 75 is fixed to the sliding plug 72, and the other end extends to the outside of the sealing cylinder 71. The clamping block 76 is fixed to one end of the connecting rod 75 located outside the sealing cylinder 71. Inclined surfaces are provided on both the top surface and the bottom surface of the clamping block 76. The shape of the card slot 6 is adapted to the shape of the clamping block 76. When the bottom mold 1 and the top mold 2 are closed, the two clamping blocks 76 are exactly opposite to the two card slots 6. At this time, the two clamping blocks 76 will move under the action of the corresponding springs 74 and be clamped into the two card slots 6, thereby completing the locking between the bottom mold 1 and the top mold 2 without manual intervention.

[0022] A fixing component is jointly arranged on the top die 2 and the top plate 3. The fixing component includes two conductive coils 81, a trigger rod 82, a push-button switch 83 and electrorheological fluid. The two conductive coils 81 are respectively sleeved on the two sealing cylinders 71. The conductive coil 81 is in a spiral structure. The trigger rod 82 is fixed on the top plate 3. The push-button switch 83 is installed on the top surface of the top die 2, and the trigger rod 82 and the push-button switch 83 are arranged opposite to each other. The electrorheological fluid is filled inside the two sealing cylinders 71. The "solidified" electrorheological fluid can fix the position of the sliding plug 72, and the positions of the two clamping blocks 76 will also be fixed. This design can prevent the positions of the two clamping blocks 76 from moving during the injection molding process, and ensure the locking effect of the two clamping blocks 76 between the bottom die 1 and the top die 2.

[0023] The specific working principle of the present utility model is as follows:

[0024] When the locking mechanism for an injection mold proposed by the present utility model is in use, during injection molding, the top plate 3 drives the top die 2 to move downward through the connecting piece 4. When the top die 2 moves downward, it can squeeze the inclined surfaces of the two clamping blocks 76. When the two clamping blocks 76 are squeezed, they can move and move away from each other. During this process, the elastic force exerted by the spring 74 on the sliding plug 72 is less than the elastic force exerted by the return spring on the top die 2. This design enables the two clamping blocks 76 to move away from each other, while there is no relative movement between the top die 2 and the top plate 3. When the bottom die 1 and the top die 2 are closed, the two clamping blocks 76 are exactly opposite to the two card slots 6. At this time, the two clamping blocks 76 will move under the action of the corresponding springs 74 and be clamped into the two card slots 6, thereby completing the locking between the bottom die 1 and the top die 2;

[0025] When the bottom die 1 and the top die 2 are closed, the top plate 3 continues to move downward. Since the top die 2 cannot move at this time, the two inner rods will respectively retract into the two outer cylinders, which makes the top plate 3 move toward the direction close to the top die 2 until the trigger rod 82 contacts the push-button switch 83. When the trigger rod 82 contacts the push-button switch 83, the two conductive coils 81 will be energized, which causes the electrorheological fluid in the two sealing cylinders 71 to produce a "solidification" phenomenon. The "solidified" electrorheological fluid can fix the position of the sliding plug 72, and the positions of the two clamping blocks 76 will also be fixed. This design can prevent the positions of the two clamping blocks 76 from moving during the injection molding process, and ensure the locking effect of the two clamping blocks 76 between the bottom die 1 and the top die 2. The specific working principle of the electrorheological fluid is not an innovative part of this technical solution and is not shown in the figure, so it will not be elaborated here;

[0026] After the injection molding is completed, the top plate 3 first moves upward until the trigger rod 82 and the push-button switch 83 are separated from each other. Without the pressing of the trigger rod 82, the two conductive coils 81 will be powered off, and the electrorheological fluid in the two sealing cylinders 71 will return to the liquid state. At this time, the two sliding plugs 72 can move freely. Further, the top plate 3 drives the top mold 2 to move upward through the two connecting members 4. During the upward movement of the top mold 2, the clamping groove 6 will squeeze the inclined surface of the clamping block 76, causing the clamping block 76 to move out of the clamping groove 6.

[0027] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A locking mechanism for an injection mold, comprising a bottom mold (1) and a top mold (2), characterized in that: It also comprises a top plate (3), the bottom surface of the top plate (3) being provided with two connecting members (4), the two connecting members (4) being connected to the top mould (2), mounting frames (5) being fixed on both sides of the bottom mould (1), slots (6) being provided on both sides of the top mould (2), locking components being provided on the two mounting frames (5), and fixing components being provided on both the top mould (2) and the top plate (3); The locking assembly comprises a sealing cylinder (71), a sliding plug (72), a plurality of through holes (73), a spring (74), a connecting rod (75) and a clamping block (76); the sealing cylinder (71) is fixed on the mounting frame (5); the sliding plug (72) is sealingly and slidably connected to the inner surface of the sealing cylinder (71); the plurality of through holes (73) are all provided on the sliding plug (72); one end of the spring (74) is connected to the inner surface of the sealing cylinder (71) and the other end is connected to the sliding plug (72); one end of the connecting rod (75) is fixedly connected to the sliding plug (72) and the other end extends to the outside of the sealing cylinder (71); the clamping block (76) is fixed to one end of the connecting rod (75) located outside the sealing cylinder (71); and the top surface and the bottom surface of the clamping block (76) are both provided with inclined surfaces.

2. The locking mechanism for an injection mold according to claim 1, characterized in that: The fixing assembly comprises two conductive coils (81), a trigger rod (82), a push-type switch (83) and an electrorheological fluid. The two conductive coils (81) are respectively sleeved on two sealing cylinders (71). The trigger rod (82) is fixed on the top plate (3). The push-type switch (83) is installed on the top surface of the top mold (2). The trigger rod (82) and the push-type switch (83) are arranged opposite to each other. The electrorheological fluid is filled in the interior of the two sealing cylinders (71).

3. The locking mechanism for an injection mold according to claim 1, characterized in that: The connecting member (4) comprises an outer cylinder, an inner rod and a return spring, wherein the outer cylinder is fixed to the bottom surface of the top plate (3), the inner rod is slidably connected to the inside of the outer cylinder, one end of the inner rod extends to the outside of the outer cylinder and is fixedly connected to the top mold (2), one end of the return spring is connected to the outer cylinder, and the other end is connected to the inner rod.

4. The locking mechanism for an injection mold according to claim 1, characterized in that: The shape of the clamping slot (6) matches the shape of the clamping block (76).

5. The locking mechanism for an injection mold according to claim 2, characterized in that: The conductive coil (81) has a spiral structure.

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