A mold with automatic sprue cutting in the mold

Abstract

The utility model discloses a mould with automatic sprue cutting in mould, including fixed mould seat board and movable mould seat board, the bottom surface fixed mould plate of fixed mould seat board, the top surface fixed mould foot of movable mould seat board, the top of mould foot is fixed with movable mould plate, is provided with lift cavity in the mould foot, is provided with thimble push board in lift cavity, is provided with the pouring flow channel on fixed mould seat board and fixed mould plate, the top surface fixed flow channel thimble of thimble push board is provided with the mould cavity between fixed mould plate and movable mould plate, is provided with sprue channel between pouring flow channel and mould cavity, is provided with cutter assembly on thimble push board, and thimble push board drives cutter assembly to ascend from the cutting channel place and cuts off sprue channel and mould cavity junction. The utility model discloses reasonable structure setting, can drive flow channel thimble and cutter assembly synchronous lifting through thimble push board, realizes the synchronous action of pouring flow channel and sprue, effectively reduced the manual cost, and make the product sprue place cutout smooth and even beautiful, is favorable for the quality of product promotion.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a mold with an automatic gate cutting function inside the mold. Background Technology

[0002] Products injection molded using the traditional side-gate method typically require manual gate removal after molding. This process demands significant manpower to cut the gate off the product and then process the removed surface. This production model consumes a large amount of human resources and time, which not only reduces production efficiency and increases production costs, but also leaves unevenly sized scars on the product surface after manual gate removal, affecting aesthetics. Thin-walled products are also prone to deformation, hindering effective control and improvement of product quality.

[0003] Although products injection molded using the traditional submersible gate method can automatically cut off the gate, the quality of the cross-section is directly affected by the size of the gate. The larger the gate, the worse the cross-section quality. A small gate will result in other quality problems such as insufficient glue and shrinkage. Therefore, the traditional submersible gate method is difficult to produce perfect products in actual production, thus limiting its applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a mold with an automatic in-mold gate that has a reasonable structural design and is conducive to improving product quality.

[0005] The technical solution to achieve the purpose of this utility model is a mold with an automatic gate cutting function inside the mold, including a fixed mold base plate and a moving mold base plate. A fixed template is fixed on the bottom surface of the fixed mold base plate, a mold foot is fixed on the top surface of the moving mold base plate, a moving template is fixed on the top of the mold foot, a lifting cavity is provided inside the mold foot, and an ejector plate connected to the ejector rod of the injection molding machine is provided inside the lifting cavity.

[0006] The fixed mold base plate and the fixed template are provided with pouring channels;

[0007] The top surface of the ejector plate is fixed with a flow channel ejector pin, a mold cavity is provided between the fixed mold plate and the moving mold plate, and a gate channel is provided between the casting flow channel and the mold cavity;

[0008] The moving template is provided with a cutting channel, which is located at the connection between the gate channel and the mold cavity;

[0009] The ejector plate is equipped with a cutter assembly. When the ejector plate rises, it drives the cutter assembly to rise from the cutting channel and cut off the connection between the gate channel and the mold cavity.

[0010] A further preferred embodiment is that the cutter assembly includes a pry block, a cutter base, and a gate cutter;

[0011] The cutter base is provided with an inclined surface and an inclined guide groove in the form of a vertical right-angled trapezoidal guide groove.

[0012] The top side of the pusher block is an inclined surface that matches the inclined side of the vertical right-angled trapezoidal guide groove, and the bottom surface of the gate cutter is an inclined connecting surface that matches the inclined guide groove.

[0013] The bottom end of the lever is set in a vertical right-angled trapezoidal guide groove, and the top end of the lever is fixed to the lower part of the cutter base.

[0014] The bottom of the gate cutter is located in an inclined guide groove, and the gate cutter can be raised and lowered within the cutter channel.

[0015] A further preferred embodiment is that the inclined surface of the vertical right-angled trapezoidal guide groove and the vertical section of the inclined guide groove are both provided with T-shaped grooves, and the inclined surface of the pusher block and the bottom surface of the gate cutter are both provided with T-shaped protrusions.

[0016] A further preferred embodiment is that the cutting channel includes a lower channel and an upper blade channel, wherein the width of the upper blade channel is smaller than the width of the lower channel;

[0017] The gate cutter includes a lower cutter body of the same size as the lower channel and an upper cutter blade of the same size as the upper cutter blade channel;

[0018] The height of the upper blade is greater than the height of the upper blade channel.

[0019] A further preferred embodiment is that a product ejector pin is fixed on the ejector plate, and the top of the product ejector pin is movable and positioned at the bottom of the mold cavity.

[0020] A further preferred embodiment is that a pressure plate is fixed to the top surface of the ejector pin plate by a screw;

[0021] The bottom of the flow channel ejector pin and cutter assembly is set on the ejector pin push plate and is clamped and positioned by the pressure plate.

[0022] This utility model has positive effects: its structure is reasonably designed, with a cutter assembly on the ejector plate and a runner ejector pin fixed on the ejector plate. The ejector plate can drive the runner ejector pin and the cutter assembly to rise and fall synchronously, thereby realizing the synchronous action of pouring the runner and the gate. It can automatically separate the product, eliminating the need for subsequent manual gate removal, effectively reducing labor costs. Moreover, it makes the cut at the gate of the product smooth, flat and beautiful, which is conducive to improving the quality of the product. It is stable and reliable in use and has strong applicability. Attached Figure Description

[0023] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the cutting blade assembly in this utility model.

[0026] Reference numerals: 1. Fixed mold base plate; 2. Moving mold base plate; 3. Fixed mold plate; 4. Mold foot; 5. Moving mold plate; 6. Lifting cavity; 7. Injection molding machine ejector pin; 8. Ejector plate; 9. Sprue; 10. Sprue; 11. Mold cavity; 12. Sprue channel; 13. Lower channel; 131. Upper blade channel; 132. Cutting assembly; 14. Pulley; 141. Cutting base; 142. Sprue cutter; 143. Lower blade body; 1431. Upper blade; 1432. Product ejector pin; 15. Pressure plate; 16. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example

[0029] See Figures 1 to 2 As shown, a mold with an automatic gate cutting function is provided, including a fixed mold base plate 1 and a movable mold base plate 2. A fixed template 3 is fixed on the bottom surface of the fixed mold base plate, a mold foot 4 is fixed on the top surface of the movable mold base plate, and a movable template 5 is fixed on the top of the mold foot. In this embodiment, the fixed mold base plate, the movable mold base plate, the fixed template, and the movable template are all conventional structures in the prior art, and are simply applied, so they are not described in detail.

[0030] In this embodiment, a lifting cavity 6 is provided inside the mold foot, and an ejector plate 8 connected to the injection molding machine ejector rod 7 is provided inside the lifting cavity; in this embodiment, the injection molding machine ejector rod is connected to the injection molding machine, the lifting height of the lifting cavity can be set as needed, and the ejector plate can realize lifting adjustment and control.

[0031] In this embodiment, the fixed mold base plate and the fixed mold plate are provided with a casting runner 9; the top surface of the ejector plate is fixed with a runner ejector pin 10; a mold cavity 11 is provided between the fixed mold plate and the moving mold plate; a gate channel 12 is provided between the casting runner and the mold cavity; and a cutting channel 13 is provided inside the moving mold plate, the cutting channel being located at the connection between the gate channel and the mold cavity; in practical applications, the gate channel is used to connect the casting runner and the mold cavity, and the cutting channel is mainly used to realize the gate cutting operation;

[0032] Furthermore, the ejector plate is equipped with a cutter assembly 14. When the ejector plate rises, it drives the cutter assembly to rise from the cutting channel and cut off the connection between the gate channel and the mold cavity. The runner ejector and the cutter assembly are fixed together on the ejector plate, so they can be raised and lowered synchronously. When the runner is opened, the cutter assembly descends to complete the casting operation. When the ejector plate rises and the runner is closed, the cutter assembly rises to complete the gate cutting operation.

[0033] In this embodiment, the cutting assembly includes a lever 141, a cutting base 142, and a gate cutter 143. During assembly, the bottom end of the lever is positioned within a vertical right-angled trapezoidal guide groove, and the top end of the lever is fixed to the lower part of the cutting base. The bottom of the gate cutter is positioned within an inclined guide groove, and the gate cutter can be raised and lowered within the cutting channel. Both the inclined surface and the vertical section of the vertical right-angled trapezoidal guide groove are provided with T-shaped grooves, and both the inclined surface of the lever and the bottom surface of the gate cutter are provided with T-shaped protrusions. These protrusions are slidably positioned within the grooves. When the lever rises, the inclined surface of the right-angled trapezoidal guide groove causes the cutting base to translate, and when the cutting base translates, the bottom surface of the gate cutter is guided and raised / lowered via the inclined guide groove. The T-shaped grooves and protrusions ensure the stability of the connection, preventing tilting or displacement, thus ensuring a stable and reliable connection.

[0034] Furthermore, the cutting channel includes a lower channel 131 and an upper blade channel 132, the width of which is smaller than the width of the lower channel; the gate cutter includes a lower blade body 1431 of the same size as the lower channel and an upper blade 1432 of the same size as the upper blade channel; the height of the upper blade is greater than the height of the upper blade channel. With this structure, the upper blade can completely cut off the gate, and a seamless connection between the upper blade and the upper blade channel can be ensured.

[0035] Furthermore, in this embodiment, a product ejector pin 15 is fixed to the ejector plate, and the top of the product ejector pin is movable and positioned at the bottom of the mold cavity. A pressure plate 16 is fixed to the top surface of the ejector plate by a screw; and the bottom of the flow channel ejector pin and the cutter assembly are set on the ejector plate and clamped and positioned by the pressure plate. This can improve the stability and reliability of the connection, and the product ejector pin also facilitates the rapid discharge of the product.

[0036] Working Principle: When the product is ejected after injection molding, the injection molding machine's ejector rod acts on the ejector plate, pushing it to move. The ejector plate then transmits power to the push block, runner ejector pins, and pressure plate, causing the push block to move upward. At this time, the T-shaped platform of the push block presses against the T-slot of the cutter base, causing the cutter base to move to the right. Simultaneously, the other T-slot of the cutter base presses against the T-shaped platform of the gate cutter, causing the gate cutter to move upward. Under the upward pressure of the gate cutter, the gate channel separates from the product. When the force-bearing inclined surface of the cutter base completely disengages from the force-bearing inclined surface of the push block, the cutter base stops moving, and the pressure on the gate cutter also stops. During this process, the runner ejector pins simultaneously push the solidified material until it is ejected from the mold. When the ejector plate pushes out to a certain position, the countersunk surface of the ejector plate contacts the boss of the product ejector pin, causing the product ejector pin to move upward and eject the product from the mold.

[0037] This utility model has positive effects: its structure is reasonably designed, with a cutter assembly on the ejector plate and a runner ejector pin fixed on the ejector plate. The ejector plate can drive the runner ejector pin and the cutter assembly to rise and fall synchronously, thereby realizing the synchronous action of pouring the runner and the gate. It can automatically separate the product, eliminating the need for subsequent manual gate removal, effectively reducing labor costs. Moreover, it makes the cut at the gate of the product smooth, flat and beautiful, which is conducive to improving the quality of the product. It is stable and reliable in use and has strong applicability.

[0038] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural parts described in the instruction manual can also be processed without any doubt based on existing technical common sense. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A mold with an in-mold automatic gate cutting mechanism, comprising a fixed mold base plate and a movable mold base plate, wherein a fixed template is fixed to the bottom surface of the fixed mold base plate, a mold foot is fixed to the top surface of the movable mold base plate, and a movable template is fixed to the top of the mold foot, characterized in that: The mold foot is provided with a lifting cavity, and the lifting cavity is provided with an ejector plate connected to the ejector rod of the injection molding machine; The fixed mold base plate and the fixed template are provided with pouring channels; The top surface of the ejector plate is fixed with a flow channel ejector pin, a mold cavity is provided between the fixed mold plate and the moving mold plate, and a gate channel is provided between the casting flow channel and the mold cavity; The moving template is provided with a cutting channel, which is located at the connection between the gate channel and the mold cavity; The ejector plate is equipped with a cutter assembly. When the ejector plate rises, it drives the cutter assembly to rise from the cutting channel and cut off the connection between the gate channel and the mold cavity.

2. The mold with an in-mold automatic gate cutting mechanism according to claim 1, characterized in that: The cutting assembly includes a pry block, a cutting base, and a gate cutting blade; The cutter base is provided with an inclined surface and an inclined guide groove in the form of a vertical right-angled trapezoidal guide groove. The top side of the pusher block is an inclined surface that matches the inclined side of the vertical right-angled trapezoidal guide groove, and the bottom surface of the gate cutter is an inclined connecting surface that matches the inclined guide groove. The bottom end of the lever is set in a vertical right-angled trapezoidal guide groove, and the top end of the lever is fixed to the lower part of the cutter base. The bottom of the gate cutter is located in an inclined guide groove, and the gate cutter can be raised and lowered within the cutter channel.

3. A mold with an in-mold automatic gate cutting mechanism according to claim 2, characterized in that: The inclined surface of the vertical right-angled trapezoidal guide groove and the vertical section of the inclined guide groove are both provided with T-shaped grooves, and the inclined surface of the pusher block and the bottom surface of the gate cutter are both provided with T-shaped protrusions.

4. A mold with an in-mold automatic gate cutting mechanism according to claim 2, characterized in that: The cutting channel includes a lower channel and an upper blade channel, wherein the width of the upper blade channel is smaller than the width of the lower channel; The gate cutter includes a lower cutter body of the same size as the lower channel and an upper cutter blade of the same size as the upper cutter blade channel; The height of the upper blade is greater than the height of the upper blade channel.

5. A mold with an in-mold automatic gate cutting mechanism according to claim 1, characterized in that: The ejector plate is also fixed with a product ejector pin, the top of which can be raised and lowered to the bottom of the mold cavity.

6. A mold with an in-mold automatic gate cutting mechanism according to claim 1, characterized in that: A pressure plate is fixed to the top surface of the ejector pin plate by a screw; The bottom of the flow channel ejector pin and cutter assembly is set on the ejector pin push plate and is clamped and positioned by the pressure plate.

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