Injection mold tightening structure

Abstract

The utility model discloses an injection mold fastening structure, and particularly relates to the technical field of molds, the injection mold fastening structure comprises an arc-shaped first clamping block and an arc-shaped second clamping block, two ends of the first clamping block and the second clamping block are respectively connected with a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are arranged pairwise, and a gap is reserved between the first connecting plate and the second connecting plate; fasteners are arranged between the second connecting plates at the ends of the first clamping block and the second clamping block and located in the gaps of the second connecting plates, and concave tightening grooves are formed in the inner side walls, close to each other, of the first clamping block and the second clamping block. According to the utility model, the phenomenon that the locking inner plate and the locking outer plate bounce outwards due to overlarge pressure can be avoided in the mold closing and locking process of the injection mold, the phenomenon that injection molding is influenced by dislocation caused by pressing of the mold in the molding process is reduced, and the injection molding quality of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically, to a tight-fitting structure of an injection mold. Background Art

[0002] Injection molding is a widely used process for manufacturing plastic parts. It relies on the injection mold to form the shape and size of the part. The mold's tight structure is a key part of ensuring injection molding quality. It ensures that the mold is tightly closed during the injection process, preventing plastic melt leakage and ensuring the dimensional accuracy and surface quality of the molded part.

[0003] Existing injection mold clamping structures typically include components such as a mold base, mold plate, locating pins, fastening bolts, or hydraulic cylinders. These structures can meet basic clamping requirements to a certain extent, but they also have some limitations. For example, during the molding process, uneven pressure and force can cause misalignment at the mold clamping edge, affecting the injection molding quality. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an injection mold tightening structure, including an arc-shaped first clamping block and a second clamping block, wherein a first connecting plate and a second connecting plate are connected to both ends of the first clamping block and the second clamping block respectively, and the first connecting plate and the second connecting plate are arranged in pairs with a gap between them. A fastener is provided between the second connecting plates at the ends of the first clamping block and the second clamping block, and the fastener is located inside the gap of the second connecting plate. A recessed tightening groove is provided on the inner side walls of the first clamping block and the second clamping block that are close to each other, and two semicircular locking inner plates are clamped between the two tightening grooves. The symmetry axis of the two locking inner plates is arranged perpendicular to the symmetry axis of the first clamping block and the second clamping block, and a locking outer plate extending outward is installed at the edges where the two locking inner plates are close to each other.

[0005] In a preferred embodiment, a hinge shaft is connected between the first connecting plates at the ends of the first clamping block and the second clamping block, and the hinge shaft is located in the gap of the first connecting plate. A first rotating shaft inserted into the first connecting plate is fixed at both ends of the hinge shaft, and the first clamping block and the second clamping block are movably hinged through the hinge shaft and the first rotating shaft.

[0006] In a preferred embodiment, the fastener includes a rotatable screw, which is located inside the gap, and a second rotating shaft is installed at one end of the screw and is inserted into the second connecting plate of the first clamp. A fastening nut is sleeved on the outside of the other end of the screw, and the fastening nut is attached to the outer wall of the second connecting plate of the second clamp.

[0007] In a preferred embodiment, a straight limiting outer plane is provided at both ends of the two locking inner plates, and a straight limiting inner plane is provided inside the tightening groove. When the two locking inner plates are embedded in the tightening groove, the limiting outer plane is in contact with the limiting inner plane.

[0008] In a preferred embodiment, the outer limiting plane and the inner limiting plane are perpendicular to the symmetry axes of the two locking inner plates.

[0009] In a preferred embodiment, the adjacent outer walls of the two locking outer plates and the adjacent outer walls of the two locking inner plates are located on the same plane, and anti-slip grooves are provided on the adjacent outer walls of the two locking inner plates.

[0010] Technical effects and advantages of this utility model:

[0011] The utility model can ensure that the locking inner plate and the locking outer plate will not be bounced outwards due to excessive pressure during the process of closing and locking the injection mold, reduce the phenomenon of dislocation of the mold due to pressure during the molding process affecting the injection molding, and improve the injection molding quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the first clamping block and the second clamping block of the utility model after opening.

[0014] Explanation of the accompanying drawings: 1 first clamping block, 2 second clamping block, 3 first connecting plate, 4 second connecting plate, 5 tightening groove, 6 locking inner plate, 7 locking outer plate, 8 hinge shaft, 9 first rotating shaft, 10 screw, 11 second rotating shaft, 12 fastening nut, 13 limiting outer plane, 14 limiting inner plane, 15 anti-slip groove. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0016] like Figure 1-2The illustrated embodiment of an injection mold tightening structure comprises an arc-shaped first clamping block 1 and a second clamping block 2, wherein a first connecting plate 3 and a second connecting plate 4 are connected to both ends of the first clamping block 1 and the second clamping block 2 respectively, and the first connecting plate 3 and the second connecting plate 4 are arranged in pairs with a gap between them, a fastener is provided between the second connecting plates 4 at the ends of the first clamping block 1 and the second clamping block 2, and the fastener is located inside the gap of the second connecting plates 4, and a recessed tightening groove 5 is provided on the inner side walls adjacent to each other of the first clamping block 1 and the second clamping block 2, and two semicircular locking inner plates 6 are clamped between the two tightening grooves 5, and the symmetry axes of the two locking inner plates 6 are perpendicularly arranged to the symmetry axes of the first clamping block 1 and the second clamping block 2, and a locking outer plate 7 extending outward is installed at the edges adjacent to each other of the two locking inner plates 6;

[0017] Furthermore, the inner side walls of the two locking inner plates 6 and the locking outer plates 7 that are close to each other are straight. When locking and closing, the straight inner side walls of the two locking inner plates 6 and the locking outer plates 7 are respectively clamped at the upper and lower mold edges of the injection mold. The mold is slowly closed and pressure is applied to lock the injection mold tightly, and then the injection molding operation is performed.

[0018] A hinge shaft 8 is connected between the first connecting plate 3 at the end of the first clamping block 1 and the second clamping block 2. The hinge shaft 8 is located in the gap of the first connecting plate 3. First rotating shafts 9 inserted into the first connecting plate 3 are fixed at both ends of the hinge shaft 8. The first clamping block 1 and the second clamping block 2 are movably hinged via the hinge shaft 8 and the first rotating shaft 9.

[0019] Based on the above, the first clamping block 1 and the second clamping block 2 are movably hinged through the setting of the hinge shaft 8 and the first rotating shaft 9, and the angle between the two is adjusted to facilitate placing the components between the first clamping block 1 and the second clamping block 2 on the upper and lower sides of the injection mold and clamping them tightly.

[0020] The fastener includes a rotatable screw 10, which is located inside the gap. A second rotating shaft 11 is installed at one end of the screw 10 and is inserted into the second connecting plate 4 of the first clamping block 1. A fastening nut 12 is sleeved on the outside of the other end of the screw 10, and the fastening nut 12 is attached to the outer wall of the second connecting plate 4 of the second clamping block 2.

[0021] Based on the above, one end of the first clamping block 1 and the second clamping block 2 is flipped and rotated by the hinge shaft 8, and the other end is fastened by the rotating screw 10, specifically:

[0022] When the first clamp 1 and the second clamp 2 are flipped to a tight angle, the screw 10 is flipped so that it rotates on the second connecting plate 4 through the second rotating shaft 11, and the other end of the screw 10 is embedded between the two second rotating shafts 11 on the other side. Then the fastening nut 12 is rotated to make it fit on the outer wall of the second connecting plate 4 on the other side, and the screw 10 is tightly fitted and limited in the gap between the second connecting plates 4 of the first clamp 1 and the second clamp 2, so as to fix the angle of the first clamp 1 and the second clamp 2.

[0023] A straight limiting outer plane 13 is provided at both ends of the two locking inner plates 6, and a straight limiting inner plane 14 is provided inside the tightening groove 5. When the two locking inner plates 6 are embedded in the tightening groove 5, the limiting outer plane 13 is aligned with the limiting inner plane 14, and the limiting outer plane 13 and the limiting inner plane 14 are perpendicular to the symmetry axis of the two locking inner plates 6;

[0024] The outer walls of the two locking outer plates 7 and the outer walls of the two locking inner plates 6 are located on the same plane, and anti-slip grooves 15 are provided on the outer walls of the two locking inner plates 6.

[0025] Furthermore, on the basis of the above, when the upper and lower molds of the injection mold are merged and tightened, the two locking outer plates 7 and the locking inner plate 6 are respectively attached to the edges of the upper and lower molds, so that the outer wall with the anti-slip groove 15 is attached to the upper and lower molds, and then the first clamp 1 and the second clamp 2 are respectively combined on both sides of the two locking outer plates 7 and the locking inner plate 6 in the vertical direction, so that the symmetry axis of the locking inner plate 6 is vertically arranged with the symmetry axis of the first clamp 1 and the second clamp 2, and the limiting outer plane 13 and the limiting inner plane 14 will fit each other. As the first clamp 1 and the second clamp 2 are merged and tightened, the two locking outer plates 7 and the locking inner plate 6 located in the tightening groove 5 will be fixed and the tightening of the upper and lower molds of the injection mold will be achieved.

[0026] Furthermore, since the angles of the two locking outer plates 7 and the locking inner plate 6 when they are tightened are perpendicular to the first clamp block 1 and the second clamp block 2, the pressure on the locking outer plate 7 is different from the direction when the first clamp block 1 and the second clamp block 2 are opened. This can ensure that during the mold closing and locking process, the locking inner plate 6 and the locking outer plate 7 will not be bounced outward due to excessive pressure, reducing the phenomenon of injection molding being affected by dislocation caused by pressure on the mold during the molding process, thereby improving the injection molding quality of the product.

[0027] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. An injection mold tightening structure, characterized in that: The cam is secured to a location where the first and second clamping blocks are engaged, and the cam is secured to a location where the first and second clamping blocks are engaged.

2. The injection mold tightening structure according to claim 1, characterized in that: A hinge shaft is connected between the first connecting plate at the end of the first clamping block and the second clamping block. The hinge shaft is located in the gap of the first connecting plate. A first rotating shaft inserted into the first connecting plate is fixed at both ends of the hinge shaft. The first clamping block and the second clamping block are movably hinged through the hinge shaft and the first rotating shaft.

3. The injection mold tightening structure according to claim 1, characterized in that: The fastener includes a rotatable screw rod, which is located inside the gap. A second rotating shaft inserted into the second connecting plate of the first clamping block is installed at one end of the screw rod, and a fastening nut is sleeved on the outside of the other end of the screw rod, and the fastening nut is attached to the outer wall of the second connecting plate of the second clamping block.

4. The injection mold tightening structure according to claim 1, characterized in that: A straight limiting outer plane is provided at both ends of the two locking inner plates, and a straight limiting inner plane is provided inside the tightening groove. When the two locking inner plates are embedded in the tightening groove, the limiting outer plane fits with the limiting inner plane.

5. The injection mold tightening structure according to claim 4, characterized in that: The outer limiting plane and the inner limiting plane are perpendicular to the symmetry axes of the two locking inner plates.

6. The injection mold fastening structure according to claim 1, characterized in that: The outer walls of the two locking outer plates that are close to each other and the outer walls of the two locking inner plates that are close to each other are located on the same plane, and anti-slip grooves are provided on the outer walls of the two locking inner plates that are close to each other.

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