Injection mold capable of automatically shearing pouring gate in mold

Abstract

The utility model belongs to the technical field of injection molding pipe fitting molds, and relates to an injection mold for automatically shearing a sprue in the mold, which comprises a fixed mold module and a movable mold module, and a cutter module for realizing sprue shearing through lateral movement of an inclined guide pillar is arranged between the fixed mold module and the movable mold module. According to the mold structure, the slider is driven by the mold inclined guide pillar to move and then drives the blade to move, so that the technology of automatically separating a product from a sprue is realized, the mold structure has the advantages of reducing labor cost waste and equipment investment cost waste, and the conventional mode that a hydraulic oil cylinder and an air cylinder drive the slider and then the slider drives the blade to shear is broken through; the die manufacturing cost is reduced, the phenomena that long-time production of a hydraulic oil cylinder exists, the oil leakage phenomenon exists, products are prone to being rejected, and production is extremely unstable are avoided, the die replacement time is saved, and external hydraulic oil cylinders, air cylinders, hydraulic oil pipes, air pipes and the like are not needed.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding pipe fitting molds, and relates to an injection mold with an automatic shearing gate in the mold. Background Art

[0002] Injection molding refers to the use of the extrudability and moldability of plastics to feed loose granular or powdered molding materials from the hopper of the injection molding machine into the high-temperature barrel for heating, melting and plasticization, turning it into a viscous fluid solution. Under the high pressure of the plunger or screw, it is injected at a high flow rate through the nozzle at the front end of the barrel into a closed mold with a lower temperature. After a period of pressure maintenance and cooling to set the shape, the mold is opened and a plastic product with a certain shape and size can be removed from the mold cavity.

[0003] Products manufactured by general injection molds are composed of products, gates, runners, and main channels. The gates and products are usually connected together, which requires later manual work or robotic shearing, resulting in high labor costs or equipment investment costs. Utility Model Content

[0004] In order to solve the above technical problems existing in the prior art, the utility model proposes an injection mold with an in-mold automatic shear gate, and its specific technical solution is as follows:

[0005] An injection mold with an in-mold automatic gate shearing function includes a fixed mold module and a movable mold module. An inclined guide column is fixedly provided in the fixed mold module, and a cutter module is slidably mounted on the inclined guide column. When the mold is opened, the cutter module shears the mold gate by moving laterally along the inclined guide column.

[0006] Furthermore, the fixed mold module includes: a fixed mold template, a fixed mold frame is installed on the fixed mold template, a fixed mold cavity is embedded in the fixed mold frame, and slider grooves are preset on the left and right sides of the fixed mold cavity, and the inclined guide columns are fixedly arranged in the slider grooves; two rows of cavities are provided in the fixed mold cavity, and a vertical block is provided between the two rows of cavities and at the outer edge of each cavity.

[0007] Furthermore, a straight surface is provided on a side wall of the slider groove away from the fixed mold cavity.

[0008] Furthermore, the movable mold module includes: a movable mold platen, a mold foot is installed on the movable mold platen, a movable mold frame is fixedly installed on the mold foot, and a mold core adapted to the fixed mold cavity is embedded in the movable mold frame.

[0009] Furthermore, an ejector pin is provided in the movable mold frame, and the front end of the ejector pin passes through a preset pinhole of the movable mold frame to the mold core.

[0010] Furthermore, the cutter module includes: a slider, the slider is provided with an oblique guide hole, and the oblique guide hole is matched and connected with the oblique guide column; two cutting blades are fixedly arranged laterally on the side of the slider near the core, and the positions of the two cutting blades correspond to the two rows of vertical blocks, and an incision corresponding to the position of each vertical block is provided on the cutting blade. When the mold is closed, the slider moves to embed into the slider groove and the vertical block is lower than the shear surface of the cutting blade.

[0011] The mold structure of the utility model utilizes the mold inclined guide column to drive the slider to move, and the slider drives the blade to move, thereby realizing the automatic separation technology of the product and the gate, which has the advantages of reducing labor cost waste and equipment investment cost waste, and breaks the conventional hydraulic oil cylinder and air cylinder to drive the slider, and then the slider drives the blade to shear, reducing the mold manufacturing cost, avoiding the hydraulic cylinder's long-term production, oil leakage, and the easy occurrence of product waste and extremely unstable production. It also saves mold changing time and does not require external hydraulic oil cylinders, cylinders, hydraulic oil pipes, air pipes, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the fixed mold module structure of the injection mold of this embodiment;

[0013] Figure 2 1 is a front view structural diagram of the movable mold module of the injection mold of this embodiment;

[0014] Figure 3 1 is a schematic side view of the movable mold module of the injection mold of this embodiment;

[0015] Figure 4 Schematic diagram of the structure of the cutter module of the injection mold of this embodiment. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] like Figures 1 to 4 As shown, an injection mold for automatically shearing the gate in the mold of this embodiment includes a fixed mold module and a movable mold module, and a cutter module is installed between the fixed mold module and the movable mold module to achieve gate shearing by lateral movement of the inclined guide column 10.

[0018] The fixed mold module includes: a fixed mold template 1, a fixed mold frame 2 is installed on the fixed mold template 1, a fixed mold cavity 3 is embedded in the fixed mold frame 2, and slider grooves are preset on the left and right sides of the fixed mold cavity 3, an inclined guide column 10 is fixedly arranged in the slider groove, and a straight surface 5 is provided on the side wall of the slider groove away from the fixed mold cavity 3, two rows of cavities are provided in the fixed mold cavity 3, and a vertical block 4 is provided between the two rows of cavities and at the outer edge of each cavity, that is, a row of vertical blocks 4 is provided at the outer edge between the two rows of cavities, and the vertical blocks 4 are used to reduce the gate. When the mold is closed, it is lower than the shear surface of the cutter to ensure that the gate and the product can be completely separated each time shearing.

[0019] The movable mold module includes a movable mold plate 6, a mold foot 7 mounted on the movable mold plate 6, a movable mold frame 8 fixedly mounted on the mold foot 7, and a mold core adapted for the fixed mold cavity 3 embedded in the movable mold frame 8. An ejector pin 11 is provided in the movable mold frame 8, and the front end of the ejector pin 11 passes through a preset pinhole in the movable mold frame 8 to the mold core, for ejecting the mold after injection molding.

[0020] The shear module comprises a slider 9, with two shear blades 12 fixed transversely mounted near the core. The two shear blades 12 are positioned to correspond to the two rows of vertical blocks 4, and each of the shear blades 12 has a notch corresponding to the position of each vertical block 4. When the mold is closed, the vertical blocks 4 are positioned below the shearing surface of the shear blades 12, ensuring that the gate and the product are completely separated each time the mold is opened and sheared. The slider 9 is provided with an inclined guide hole, into which an inclined guide post 10 is inserted for relative sliding movement.

[0021] When the mold of this embodiment is preparing for injection molding and closing the fixed mold module and the movable mold module, the slider 9 is driven inward by the inclined guide column 10. When the slider 9 enters the slider groove, it is first reset using the straight surface 5 and then the mold is completely closed, otherwise the cutting blade 12 will interfere with the vertical block 4.

[0022] After the injection molding of the product is completed, the mold is opened, the fixed mold module and the movable mold module are separated, and the vertical block 4 is moved out of the incision. At the same time, the slider 9 is driven to move to both sides under the action of the inclined guide column 10, and the slider 9 drives the cutting blade 12 to move and cut the gate, so that the gate and the product are completely separated.

[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation on the present invention. Although the implementation process of the present invention has been described in detail above, those familiar with the art will still be able to modify the technical solutions described in the above examples or replace some of the technical features with equivalents. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An injection mold with an in-mold automatic shear gate, comprising a fixed mold module and a movable mold module, characterized in that: An inclined guide column (10) is fixedly provided in the fixed mold module, and a cutter module is slidably mounted on the inclined guide column (10). When the mold is opened, the cutter module moves laterally through the inclined guide column (10) to shear the mold gate.

2. The injection mold according to claim 1, characterized in that The fixed mold module comprises: a fixed mold template (1), a fixed mold frame (2) mounted on the fixed mold template (1), a fixed mold cavity (3) embedded in the fixed mold frame (2), and slider grooves preset on the left and right sides of the fixed mold cavity (3), and an inclined guide column (10) fixedly arranged in the slider grooves; two rows of cavities are provided in the fixed mold cavity (3), and a vertical block (4) is provided between the two rows of cavities and at the outer edge of each cavity.

3. The injection mold according to claim 2, characterized in that A straight surface (5) is provided on a side wall of the slider groove away from the fixed mold cavity (3).

4. The injection mold according to claim 2, characterized in that The movable mold module comprises: a movable mold plate (6), a mold foot (7) is mounted on the movable mold plate (6), a movable mold frame (8) is fixedly mounted on the mold foot (7), and a mold core adapted to the fixed mold cavity (3) is embedded in the movable mold frame (8).

5. The injection mold according to claim 4, characterized in that: An ejector pin (11) is provided in the movable mold frame (8), and the front end of the ejector pin (11) passes through a preset pinhole of the movable mold frame (8) to the mold core.

6. The injection mold according to claim 4, characterized in that The cutter module comprises: a slider (9), the slider (9) is provided with an oblique guide hole, and the oblique guide hole is matched and connected with the oblique guide column (10); two cutting blades (12) are fixedly arranged laterally on the side of the slider (9) near the core, the positions of the two cutting blades (12) correspond to the two rows of vertical blocks (4), and a cut corresponding to the position of each vertical block (4) is provided on the cutting blade (12); when the mold is closed, the slider (9) moves to be embedded in the slider groove and the vertical block (4) is lower than the shear surface of the cutting blade (12).

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