Sealing ring forming device

Abstract

The utility model discloses a sealing ring molding device, which relates to the field of injection molding, including: an A plate, a push plate, a B plate, an ejector plate, a lower fixed plate, a front mold core, a rear mold core, a first guide column, and a time-delay ejector. The ejector plate is provided with a slide groove and a first through hole, the slide groove is arranged inside the ejector plate, the slide groove and the first through hole are arranged coaxially, the time-delay ejector is provided with a protruding structure, the protruding structure is slidably arranged inside the slide groove, the upper end of the time-delay ejector sequentially passes through the first through hole, the B plate and the rear mold core, the core is provided with a cold runner, a gate and a molding surface, the gate is symmetrically arranged inside the core, the molding surface is arranged around the center line of the core, and the time-delay ejector is projected in the middle of the cold runner along the mold opening direction. When the mold is opened, the push plate rises first and the ejector does not move, disconnecting the injection molded part and the gate. Then the push plate and the ejector rise synchronously, and the ejector ejects the molded and solidified sprue material from the rear mold core, ejecting the injection molded part and the sprue material, and the injection molded part and the sprue material will be automatically disconnected.

Description

Technical Field

[0001] The utility model relates to the field of injection molding, in particular to a sealing ring molding device. Background Art

[0002] At present, after the product gate is injection molded, the gate of the product and the gate material will be connected together, and the gate material needs to be manually cut off. At present, most plastic molding molds on the market need to be processed a second time to cut off the gate material and the injection molded part. When processing the sealing ring, because the sealing ring is round and has a small outer diameter. When manually cutting the gate material, it is necessary to reach into the sealing ring. Due to the volume of the sealing ring, the operating space is small when cutting the gate, which will inevitably scratch the surface of the product, making it difficult to remove the gate material, and the traces after the gate is removed are more obvious. Utility Model Content

[0003] The purpose of the utility model is to provide a sealing ring forming device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sealing ring forming device, comprising: an A plate, a push plate, a B plate, an ejector plate, a lower fixed plate, a front mold core, a rear mold core, a first guide column, and a time-delay ejector. The A plate, the push plate, the B plate, the ejector plate and the lower fixed plate are arranged in sequence along a straight line. The front mold core is embedded in the A plate, the lower end of the rear mold core is arranged on the B plate, the upper end of the rear mold core passes through the push plate, the push plate and the ejector plate are connected through the first guide column, the first guide column passes through the B plate, the ejector plate is provided with a slide groove and a first through hole, the slide groove is arranged inside the ejector plate, the slide groove and the first through hole are coaxially arranged, the time-delay ejector passes through the first through hole, and the time-delay ejector passes through the first through hole. The ejector pin is provided with a protruding structure, which is slidably arranged inside the slide groove along the mold opening direction. The upper end of the time-delay ejector pin sequentially passes through the first through hole, the B plate and the rear mold core. The front mold core is provided with a cavity, and the rear mold core is provided with a core. The core is projected at the center of the cavity along the mold opening direction. The core is provided with a cold runner, a gate and a molding surface. The cold runner, the gate and the molding surface are sequentially arranged along the radius direction of the core. The cold runner is arranged at the center of the top surface of the core, the gate is symmetrically arranged inside the core, the molding surface is arranged around the center line of the core, and the time-delay ejector pin is projected at the middle of the cold runner along the mold opening direction. When the mold is opened, the protruding structure moves from the lower end of the slide groove to the upper end of the slide groove.

[0005] Preferably, it also includes a push plate inlay, which is arranged on the push plate, and the rear mold core is arranged through the center of the push plate inlay, and the projection of the push plate inlay on the front mold core along the mold opening direction intersects with the edge of the cavity.

[0006] Preferably, the delay ejector pin comprises a long ejector pin and a short ejector pin, the lower end of the long ejector pin abuts against the upper end of the short ejector pin, the upper end of the long ejector pin and the lower end of the short ejector pin respectively penetrate the upper and lower ends of the first through hole, the lower end of the long ejector pin and the upper end of the short ejector pin are both provided with a protrusion, and the protrusion is slidably arranged inside the slide groove along the mold opening direction; when the mold is closed, the lower end of the short ejector pin abuts against the lower fixed plate.

[0007] Preferably, a second through hole for the rear mold core to pass through is opened at the center of the push plate insert, and the diameter of the second through hole gradually decreases in the direction toward the front mold core.

[0008] Preferably, when the mold is closed, the upper end of the long ejector pin is arranged below the cold runner, the core is provided with a second through hole for the delay ejector pin to pass through, and the upper end of the long ejector pin is arranged inside the second through hole. When the mold is closed, the top of the second through hole will act as a cold well.

[0009] Preferably, the ejector plate comprises an ejector panel and an ejector bottom plate, the ejector panel is detachably arranged on the top surface of the ejector bottom plate, the bottom surface of the ejector panel and the top surface of the ejector bottom plate are respectively provided with a first groove and a second groove, and the first groove and the second groove are connected to form a slide groove.

[0010] Preferably, one end of the gate away from the cold runner is connected to the upper end of the molding surface, and one end of the gate away from the cold runner is arranged to be inclined downward, and the gate gradually shrinks in the direction away from the cold runner.

[0011] Preferably, it further comprises an elastic element, wherein the elastic element sleeve is arranged on the first guide column, and two ends of the elastic element respectively abut against the B plate and the ejector plate.

[0012] Preferably, it also includes an upper fixed plate, a hot runner plate and a needle valve type hot nozzle. The upper fixed plate, the hot runner plate, the A plate, the push plate, the B plate, the ejector plate and the lower fixed plate are arranged in sequence along a straight line. The upper end of the needle valve type hot nozzle is arranged inside the hot runner plate, and the lower end of the needle valve type hot nozzle is arranged inside the front mold core. The needle valve type hot nozzle is connected to the cavity.

[0013] Preferably, it also includes a heating rod, which is arranged inside the front mold core and the rear mold core.

[0014] Preferably, the delay ejector includes an ejector body and a protrusion, the protrusion is a cylindrical structure, a threaded hole is opened at the center of the protrusion, an external thread is provided at the lower end of the ejector body, and the protrusion is threadedly connected to the lower end of the ejector body.

[0015] The working principle of the utility model is as follows: when ejecting the product, the ejector panel and the ejector bottom plate rise together. Since the push plate and the ejector plate are fixedly connected together, the two will move synchronously. Since the raised structure can slide inside the slide groove, when the ejector panel and the ejector bottom plate rise, the raised structure will fall relative to the ejector panel and the ejector bottom plate. At this time, the ejector panel and the ejector bottom plate rise and the delayed ejector and the rear mold core are both stationary. When the push plate rises, the push plate insert will rise, and the push plate insert will push the injection molded part to rise, and the sprue material of the injection molded part and the rear mold core will be automatically disconnected.

[0016] When the raised structure drops to the lower end of the chute, the ejector panel and the ejector bottom plate will drive the raised structure and the delayed ejector to rise. The ejector panel and the ejector bottom plate drive the push plate and the delayed ejector to rise, and the ejector rises to eject the sprue material in the mold core.

[0017] The beneficial effects of the utility model are as follows: when the mold is opened, the push plate rises first and the ejector does not move, disconnecting the injection molded part and the gate. Then the push plate and the ejector rise synchronously, and the ejector ejects the molded and solidified gate material from the rear mold core, ejecting the injection molded part and the gate material, and the injection molded part and the gate material will be automatically disconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0019] Figure 1 A structural schematic diagram of a sealing ring molding device in a mold closing state provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of the rear mold in the mold opening state provided by an embodiment of the utility model Figure 1 ;

[0021] Figure 3 A schematic diagram of the structure of the rear mold in the mold opening state provided by an embodiment of the utility model Figure 2 ;

[0022] Figure 4 for Figure 1 An enlarged view of the A part in FIG.

[0023] Figure 5 for Figure 2 An enlarged view of part B in FIG.

[0024] Figure 6 for Figure 3 An enlarged view of the C portion in FIG.

[0025] Figure 7 A schematic diagram of the structure of the front mold in the mold opening state provided by an embodiment of the utility model;

[0026] Figure 8 A three-dimensional diagram of a sealing ring forming device provided in one embodiment of the utility model;

[0027] Figure numerals: 1: upper fixed plate; 2: hot runner plate; 3: A plate; 4: push plate; 5: B plate; 6: square iron; 7: lower fixed plate; 8: needle valve type hot nozzle; 9: front mold core; 10: push plate insert; 11: rear mold core; 12: long ejector; 13: cold runner; 14: injection molded part; 15: ejector panel; 16: ejector bottom plate; 17: limit column; 18: short ejector. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0029] It should be noted that in the present invention, unless otherwise stated, when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element at the same time. The directional words used, such as "upper, lower, left, right" generally refer to the position of the element. Figure 1 "Inside and outside" refers to the inside and outside of the specific outline.

[0030] like Figure 1-Figure 8 As shown in, a sealing ring forming device provided by an embodiment of the utility model includes: an A plate, a push plate, a B plate, an ejector plate, a lower fixed plate, a front mold core, a rear mold core, a first guide column, and a time-delay ejector. The A plate, the push plate, the B plate, the ejector plate and the lower fixed plate are arranged in sequence along a straight line. The front mold core is embedded in the A plate, the lower end of the rear mold core is arranged on the B plate, and the upper end of the rear mold core passes through the push plate. The push plate and the ejector plate are connected through the first guide column, and the first guide column passes through the B plate. The ejector plate is provided with a slide groove and a first through hole, the slide groove is arranged inside the ejector plate, the slide groove and the first through hole are coaxially arranged, the time-delay ejector passes through the first through hole, and the time-delay ejector is provided There is a convex structure, which is slidably arranged inside the chute along the mold opening direction, the upper end of the delay ejector sequentially passes through the first through hole, the B plate and the rear mold core, the front mold core is provided with a cavity, the rear mold core is provided with a core, the core is projected at the center of the cavity along the mold opening direction, the core is provided with a cold runner, a gate and a molding surface, the cold runner, the gate and the molding surface are sequentially arranged along the radius direction of the core, the cold runner is arranged at the center of the top surface of the core, the gate is symmetrically arranged inside the core, the molding surface is arranged around the center line of the core, and the delay ejector is projected in the middle of the cold runner along the mold opening direction; when the mold is opened, the convex structure moves from the lower end of the chute to the upper end of the chute. The length of the chute is 4mm to 6mm, preferably 5mm.

[0031] It also includes a push plate inlay, which is arranged on the push plate, and the rear mold core is arranged through the center of the push plate inlay. The projection of the push plate inlay on the front mold core along the mold opening direction intersects with the edge of the cavity.

[0032] The time-delay ejector pin comprises a long ejector pin and a short ejector pin, the lower end of the long ejector pin abuts against the upper end of the short ejector pin, the upper end of the long ejector pin and the lower end of the short ejector pin respectively penetrate the upper and lower ends of the first through hole, the lower end of the long ejector pin and the upper end of the short ejector pin are both provided with a protrusion, and the protrusion is slidably arranged inside the slide groove along the mold opening direction; when the mold is closed, the lower end of the short ejector pin abuts against the lower fixed plate.

[0033] A second through hole for the rear mold core to pass through is opened at the center of the push plate insert, and the diameter of the second through hole gradually decreases in the direction toward the front mold core.

[0034] When the mold is closed, the upper end of the long ejector pin is arranged below the cold runner, the core is provided with a second through hole for the delay ejector pin to pass through, and the upper end of the long ejector pin is arranged inside the second through hole. When the mold is closed, the top of the second through hole will act as a cold well.

[0035] The ejector plate includes an ejector panel and an ejector bottom plate. The ejector panel is detachably arranged on the top surface of the ejector bottom plate. The bottom surface of the ejector panel and the top surface of the ejector bottom plate are respectively provided with a first groove and a second groove, and the first groove and the second groove are connected to form a slide groove. A limit column is provided on the top surface of the ejector panel, and the limit column is used to limit the minimum distance between the ejector panel and the B plate when the mold is opened. When the mold is closed, the spacing between the limit column and the B plate is 10mm to 20mm, preferably 15mm.

[0036] One end of the gate away from the cold runner is connected to the upper end of the molding surface, and the end of the gate away from the cold runner is tilted downward, and the gate gradually shrinks in the direction away from the cold runner.

[0037] It also includes an elastic element, which is sleeved on the first guide column, and two ends of the elastic element respectively abut against the B plate and the ejector plate.

[0038] It also includes an upper fixed plate, a hot runner plate and a needle valve type hot nozzle. The upper fixed plate, the hot runner plate, the A plate, the push plate, the B plate, the ejector plate and the lower fixed plate are arranged in sequence along a straight line. The upper end of the needle valve type hot nozzle is arranged inside the hot runner plate, and the lower end of the needle valve type hot nozzle is arranged inside the front mold core. The needle valve type hot nozzle is connected to the cavity.

[0039] It also includes a heating rod, which is arranged inside the front mold core and the rear mold core.

[0040] In one embodiment, the delay ejector includes an ejector body and a protrusion, the protrusion is a cylindrical structure, a threaded hole is opened at the center of the protrusion, an external thread is provided at the lower end of the ejector body, and the protrusion is threadedly connected to the lower end of the ejector body.

[0041] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, which should be considered as the scope of this specification.

Claims

1. A sealing ring forming device, characterized in that: include: A plate, a push plate, a B plate, an ejector plate, a lower fixed plate, a front mold core, a rear mold core, a first guide column, and a time-delay ejector. The A plate, the push plate, the B plate, the ejector plate and the lower fixed plate are arranged in sequence along a straight line. The front mold core is embedded in the A plate, the lower end of the rear mold core is arranged on the B plate, the upper end of the rear mold core passes through the push plate, the push plate and the ejector plate are connected by the first guide column, the first guide column passes through the B plate, the ejector plate is provided with a slide groove and a first through hole, the slide groove is arranged inside the ejector plate, the slide groove and the first through hole are coaxially arranged, the time-delay ejector is arranged through the first through hole, the time-delay ejector is provided with a convex structure, and the convex structure is arranged along the mold opening The front mold core is provided with a cavity, and the rear mold core is provided with a core. The core is projected at the center of the cavity along the mold opening direction. The core is provided with a cold runner, a gate and a molding surface. The cold runner, the gate and the molding surface are arranged in sequence along the radius direction of the core. The cold runner is arranged at the center of the top surface of the core, the gate is symmetrically arranged inside the core, the molding surface is arranged around the center line of the core, and the delay ejector is projected at the middle of the cold runner along the mold opening direction. When the mold is opened, the protruding structure moves from the lower end of the slide groove to the upper end of the slide groove.

2. The sealing ring forming device according to claim 1, characterized in that: It also includes a push plate inlay, which is arranged on the push plate, and the rear mold core is arranged through the center of the push plate inlay. The projection of the push plate inlay on the front mold core along the mold opening direction intersects with the edge of the cavity.

3. The sealing ring forming device according to claim 1, characterized in that: The time-delay ejector pin comprises a long ejector pin and a short ejector pin, the lower end of the long ejector pin abuts against the upper end of the short ejector pin, the upper end of the long ejector pin and the lower end of the short ejector pin respectively penetrate the upper and lower ends of the first through hole, the lower end of the long ejector pin and the upper end of the short ejector pin are both provided with a protrusion, and the protrusion is slidably arranged inside the slide groove along the mold opening direction; when the mold is closed, the lower end of the short ejector pin abuts against the lower fixed plate.

4. The sealing ring forming device according to claim 2, characterized in that: A second through hole for the rear mold core to pass through is opened at the center of the push plate insert, and the diameter of the second through hole gradually decreases in the direction toward the front mold core.

5. The sealing ring forming device according to claim 3, characterized in that: When the mold is closed, the upper end of the long ejector pin is arranged below the cold runner.

6. The sealing ring forming device according to claim 1, characterized in that: The ejector plate includes an ejector panel and an ejector bottom plate. The ejector panel is detachably arranged on the top surface of the ejector bottom plate. The bottom surface of the ejector panel and the top surface of the ejector bottom plate are respectively provided with a first groove and a second groove. The first groove and the second groove are connected to form a slide groove.

7. The sealing ring forming device according to claim 1, characterized in that: One end of the gate away from the cold runner is connected to the upper end of the molding surface, and the end of the gate away from the cold runner is tilted downward, and the gate gradually shrinks in the direction away from the cold runner.

8. The sealing ring forming device according to claim 1, characterized in that: It also includes an elastic element, which is sleeved on the first guide column, and two ends of the elastic element respectively abut against the B plate and the ejector plate.

9. The sealing ring forming device according to claim 1, characterized in that: It also includes an upper fixed plate, a hot runner plate and a needle valve type hot nozzle. The upper fixed plate, the hot runner plate, the A plate, the push plate, the B plate, the ejector plate and the lower fixed plate are arranged in sequence along a straight line. The upper end of the needle valve type hot nozzle is arranged inside the hot runner plate, and the lower end of the needle valve type hot nozzle is arranged inside the front mold core. The needle valve type hot nozzle is connected to the cavity.

10. The sealing ring forming device according to claim 9, characterized in that: It also includes a heating rod, which is arranged inside the front mold core and the rear mold core.

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