Mould sprue bush

Abstract

The utility model discloses a mold sprue bush which comprises a sprue bush body and an outer sleeve, wherein a conical pouring gate is arranged inside the sprue bush body; the outer sleeve is sleeved on the outer side of the sprue bush body; a spiral cooling runner is arranged between the outer sleeve and the sprue bush body, a water inlet extending out of the outer sleeve is formed in the lower end of the spiral cooling runner, and a water outlet extending out of the outer sleeve is formed in the upper end of the spiral cooling runner; and the distance between the spiral cooling runner and the conical pouring gate is gradually increased from bottom to top. The lower end of the spiral cooling runner is closer to the conical pouring gate, so that a better cooling effect is achieved, materials at the upper end and the lower end in the conical pouring gate are cooled more uniformly, the solidification time of the materials at the upper end and the lower end is closer, and the wire drawing phenomenon caused by solidification of the materials at the upper end and incomplete solidification of the materials at the lower end is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold gate sleeve. Background Art

[0002] The sprue sleeve is a device used in the field of plastic injection molding, also called a nozzle or a filling nozzle. Its function is to connect the injection molding machine and the mold to complete the filling process. In the process of the molten plastic material being ejected from the injection molding machine to being cooled and formed inside the mold, due to the thick wall of the sprue sleeve and the low heat dissipation efficiency, the molten plastic here takes a long time to condense and solidify, which takes the most time in the molding cycle. In order to speed up the solidification of the material at the sprue sleeve, water-cooled sprue sleeves have appeared on the market. As shown in the patented technology with application number CN202010236501.5, this technology sets a spiral cooling water channel on the periphery of the runner of the sprue sleeve, and uses cooling water to accelerate the solidification of the material at the sprue sleeve, thereby improving the pouring efficiency. However, since the runner is in an inverted cone shape, with a larger diameter at the bottom than at the top, the material in the runner is thicker at the bottom and thinner at the top after pouring, while the distance between the spiral cooling water channel and the runner is the same from top to bottom. This will lead to a large difference in the solidification time of the materials at the upper and lower ends. When workers open the mold because the upper material has solidified, wire drawing may occur because the lower material has not completely solidified, affecting product quality. Utility Model Content

[0003] The utility model aims to solve the above problems and provides a mold sprue sleeve which can evenly cool the material at the runner.

[0004] The purpose of the utility model is achieved through the following technical scheme: a mold gate sleeve, comprising a gate sleeve body with a tapered runner arranged inside and an outer sleeve arranged outside the gate sleeve body; a spiral cooling channel is arranged between the outer sleeve and the gate sleeve body, a water inlet extending out of the outer sleeve is arranged at the lower end of the spiral cooling channel, and a water outlet extending out of the outer sleeve is arranged at the upper end of the spiral cooling channel; the distance between the spiral cooling channel and the tapered runner gradually increases from bottom to top.

[0005] Furthermore, the gate sleeve body includes an end plate and an inverted cone core body arranged below the end plate; the outer wall of the inverted cone core body is spirally provided with a core semicircular runner, and the conical runner passes through the inverted cone core body and the end plate from top to bottom; an inverted cone mounting hole is provided inside the outer sleeve, and the hole wall of the inverted cone mounting hole is spirally provided with an outer sleeve semicircular runner, the inverted cone core body is installed in the inverted cone mounting hole, and the outer sleeve semicircular runner and the core body semicircular runner together enclose the spiral cooling runner.

[0006] A connecting cavity is arranged on the lower surface of the end plate, an internal thread is arranged in the cavity wall of the connecting cavity, an external thread is arranged on the upper end of the outer sleeve, and the outer sleeve is threadedly connected to the end plate.

[0007] A sealing gasket is arranged at the bottom of the connecting cavity.

[0008] A sealing ring is arranged at the lower end of the inverted cone core.

[0009] An upper guard plate is arranged at the upper end of the sprue sleeve body, and a sprue connected with the tapered runner is arranged on the upper guard plate.

[0010] The side wall of the gate is provided with an annular concave platform, and a support ring is installed on the annular concave platform.

[0011] The bottom of the annular concave platform is provided with an annular clamping edge, the lower surface of the supporting ring is provided with an annular clamping groove, and the annular clamping edge is clamped into the annular clamping groove.

[0012] Compared with the prior art, this application has the following beneficial effects:

[0013] (1) The distance between the spiral cooling channel and the tapered runner of the utility model gradually increases from bottom to top, and the water inlet is located at the lower end of the spiral cooling channel, and the water outlet is located at the upper end of the spiral cooling channel; the lower end of the spiral cooling channel is closer to the tapered runner, which has a better cooling effect, so that the materials at the upper and lower ends of the tapered runner are cooled more evenly, and the solidification time of the materials at the upper and lower ends is closer, avoiding the wire drawing phenomenon caused by the solidification of the upper end material while the lower end material is not completely solidified.

[0014] (2) The spiral cooling channel of the utility model is formed by the outer jacket semicircular channel and the core semicircular channel, and the outer jacket can be disassembled to facilitate cleaning of the spiral cooling channel.

[0015] (3) The utility model is provided with an upper guard plate, and the upper guard plate is provided with a supporting ring. The upper guard plate and the supporting ring are used to protect the sprue sleeve body to prevent the head of the casting machine from damaging the sprue sleeve body.

[0016] Some additional features of the present application may be explained in the following description. Some additional features of the present application will be apparent to those skilled in the art by inspection of the following description and corresponding drawings or understanding of the production or operation of the embodiments. The features disclosed in the present application may be realized and achieved by practice or use of various methods, means and combinations of the specific embodiments described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation of the present application. In each figure, the same reference numeral represents the same component.

[0018] Figure 1 It is a cross-sectional view of the utility model.

[0019] Figure 2 It is a cross-sectional view of the gate sleeve body of the utility model.

[0020] Figure 3 It is a cross-sectional view of the outer coat of the present utility model.

[0021] Figure 4 for Figure 1 A magnified schematic diagram of center A.

[0022] Figure 5 It is a cross-sectional view of the upper guard plate of the present utility model.

[0023] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle.

[0024] Figure 7 It is a cross-sectional view of the supporting ring of the utility model.

[0025] The figure marks in the above drawings are: 100—upper guard plate, 110—gate, 120—annular recess, 130—annular clamping edge, 140—rest ring, 150—annular clamping groove, 200—gate sleeve body, 210—end plate, 220—inverted cone core, 230—conical runner, 240—connecting cavity, 250—core semicircular flow channel, 260—sealing ring, 300—jacket, 310—inverted cone mounting hole, 320—jacket semicircular flow channel, 330—water outlet, 340—water inlet, 350—external thread. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that if the description and claims of the present application and the above-mentioned drawings relate to the terms "first", "second", etc., they are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, if the terms "including" and "having" and any of their variations are involved, it is intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0028] In this application, if the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0030] In addition, in this application, the terms "installed", "set", "provided with", "connected", "connected", "socketed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Example 1

[0033] like Figure 1 As shown, this embodiment discloses a mold sprue bushing, which includes a sprue bushing body 200 with a tapered runner 230 disposed therein and an outer sleeve 300 sleeved on the outer side of the sprue bushing body 200 .

[0034] Specifically, Figure 2 As shown, the gate sleeve body 200 includes an end plate 210 and an inverted cone core 220 disposed below the end plate 210, and a conical runner 230 passes through the inverted cone core 220 and the end plate 210 from top to bottom. A connecting cavity 240 is disposed on the lower surface of the end plate 210, and the inverted cone core 220 extends downward from the bottom of the connecting cavity 240. An internal thread is disposed in the cavity wall of the connecting cavity 240, and an external thread 350 is disposed at the upper end of the outer sleeve 300. The upper end of the outer sleeve 300 is screwed into the connecting cavity 240 through threads, so that the outer sleeve 300 and the end plate 210 are detachably connected.

[0035] The outer wall of the inverted cone core 220 is spirally provided with a core semicircular flow channel 250; Figure 3 As shown, the outer sleeve 300 is provided with an inverted cone mounting hole 310, and the hole wall of the inverted cone mounting hole 310 is spirally provided with an outer sleeve semicircular flow channel 320. When the outer sleeve 300 is installed on the end plate 210, the inverted cone core 220 is installed in the inverted cone mounting hole 310, and the outer sleeve semicircular flow channel 320 and the core semicircular flow channel 250 together enclose a spiral cooling flow channel.

[0036] In addition, the outer jacket 300 is provided with a water inlet 340 and a water outlet 330. The water inlet 340 is connected to the lower end of the spiral cooling channel, and the water outlet 330 is connected to the upper end of the spiral cooling channel. When working, cooling water flows from bottom to top through the spiral cooling channel. When the outer jacket 300 is removed, the spiral cooling channel can be easily cleaned.

[0037] In the present embodiment, since the inverted cone core 220 is in the shape of an inverted cone that is wider at the top and narrower at the bottom, and the conical runner 230 is in the shape of a cone that is narrow at the top and wider at the bottom, the distance between the spiral cooling channel and the conical runner 230 gradually increases from bottom to top, so that the cooling effect of the material at the lower end of the conical runner 230 is better than that of the upper end; and since the cooling water flows from bottom to top through the spiral cooling channel, under the effect of heat transfer, the water temperature of the cooling water at the upper end of the spiral cooling channel is higher than that of the lower end, which can better cool the thicker material at the lower end of the conical runner 230, so that the solidification time of the materials at the upper and lower ends of the conical runner 230 is closer, thereby avoiding the wire drawing phenomenon caused by the solidification of the upper end material while the lower end material is not completely solidified.

[0038] In order to achieve a better sealing effect, a sealing gasket is provided at the bottom of the connection cavity 240. When the outer sleeve 300 is installed in the connection cavity 240, its upper end presses the sealing gasket; accordingly, a sealing ring 260 is provided at the lower end of the inverted cone core 220. When the outer sleeve 300 is installed outside the inverted cone core 220, the sealing ring 260 is closely attached to the inner wall of the outer sleeve 300, so that a good sealing effect is achieved between the outer sleeve 300 and the inverted cone core 220.

[0039] Example 2

[0040] like Figure 1 As shown, based on Example 1, this embodiment has an upper guard plate 100 installed on the upper end of the gate sleeve body 200 by bolts, and the upper guard plate 100 is provided with a gate 110 connected to the conical runner 230, and the gate 110 is in the shape of a trumpet that is wide at the top and narrow at the bottom.

[0041] In addition, if Figures 4 to 7 As shown, the lower end side wall of the gate 110 is provided with an annular recess 120 , and a support ring 140 is installed on the annular recess 120 .

[0042] In specific configuration, the bottom of the annular concave platform 120 is provided with an annular clamping edge 130, and the lower surface of the support ring 140 is provided with an annular clamping groove 150 that matches the annular concave platform 120. During installation, the annular clamping edge 130 is inserted into the annular clamping groove 150, so that the support ring 140 is detachably installed on the annular concave platform 120. During pouring, the head of the pouring machine is inserted into the gate 110 and abuts against the support ring 140, and then the material can be injected into the tapered runner 230.

[0043] In this embodiment, the sprue sleeve body 200 is protected by the upper guard plate 100 and the support ring 140 to prevent the head of the pouring machine from damaging the sprue sleeve body 200.

[0044] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0045] In addition, the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the utility model, and these solutions also belong to the disclosure scope of the utility model and fall within the protection scope of the utility model. Those skilled in the art should understand that the utility model specification and its drawings are illustrative and do not constitute a limitation of the claims. The protection scope of the utility model is defined by the claims and their equivalents.

Claims

1. A mold sprue bushing, characterized in that: The invention comprises a sprue sleeve body (200) with a tapered sprue (230) arranged inside and an outer sleeve (300) sleeved on the outer side of the sprue sleeve body (200); a spiral cooling channel is arranged between the outer sleeve (300) and the sprue sleeve body (200); a water inlet (340) extending out of the outer sleeve (300) is arranged at the lower end of the spiral cooling channel, and a water outlet (330) extending out of the outer sleeve (300) is arranged at the upper end of the spiral cooling channel; and the distance between the spiral cooling channel and the tapered sprue (230) gradually increases from bottom to top.

2. The mold gate bushing according to claim 1, characterized in that: The gate sleeve body (200) comprises an end plate (210) and an inverted cone core (220) arranged below the end plate (210); the outer wall of the inverted cone core (220) is spirally provided with a core semicircular flow channel (250), and the conical runner (230) passes through the inverted cone core (220) and the end plate (210) from top to bottom; an inverted cone mounting hole (310) is arranged inside the outer sleeve (300), and the hole wall of the inverted cone mounting hole (310) is spirally provided with an outer sleeve semicircular flow channel (320), the inverted cone core (220) is installed in the inverted cone mounting hole (310), and the outer sleeve semicircular flow channel (320) and the core semicircular flow channel (250) together enclose the spiral cooling flow channel.

3. The mold gate bushing according to claim 2, characterized in that: A connecting cavity (240) is provided on the lower surface of the end plate (210), an internal thread is provided in the cavity wall of the connecting cavity (240), an external thread (350) is provided at the upper end of the outer sleeve (300), and the outer sleeve (300) is threadedly connected to the end plate (210).

4. The mold gate bushing according to claim 3, characterized in that: A sealing gasket is provided at the bottom of the connecting cavity (240).

5. The mold gate bushing according to claim 4, characterized in that: A sealing ring (260) is provided at the lower end of the inverted cone core (220).

6. The mold sprue bushing according to any one of claims 1 to 5, characterized in that: An upper guard plate (100) is provided at the upper end of the sprue sleeve body (200), and a sprue (110) communicating with the tapered runner (230) is provided on the upper guard plate (100).

7. The mold gate bushing according to claim 6, characterized in that: The side wall of the gate (110) is provided with an annular concave platform (120), and a supporting ring (140) is installed on the annular concave platform (120).

8. The mold sprue bushing according to claim 7, characterized in that: The annular concave platform (120) The bottom is provided with an annular clamping edge (130), and the lower surface of the supporting ring (140) is provided with an annular clamping groove (150). The annular clamping edge (130) is clamped into the annular clamping groove (150).

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