CN214353912U - Side gate needle valve type hot runner system suitable for injection mold - Google Patents

Abstract

The utility model relates to a side direction runner needle valve formula hot runner system suitable for injection mold, including runner needle valve, molten plastic flow pipeline and drive unit. The gate needle valve is matched with the injection mold for use and comprises a valve body, a first lateral valve needle part, a second lateral valve needle part and a sliding driving block. The valve body is internally provided with a molten plastic flow passage. The molten plastic flow pipeline is inserted on the valve body and communicated with the molten plastic flow channel. The valve body is in a cavity structure, and a cavity which is completely isolated from the molten plastic flow channel is arranged in the valve body. The first lateral needle valve portion, the second lateral needle valve portion and the slide drive block are all disposed in the cavity. When the drive unit acts, the sliding drive block is driven to perform reciprocating sliding motion along the height direction, and the first lateral needle valve portion and the second lateral needle valve portion are driven to perform synchronous telescopic motion so as to realize the on/off control of the gate of the injection mold.

Description

Side gate needle valve type hot runner system suitable for injection mold

Technical Field

The utility model belongs to the technical field of injection mold development technique and specifically relates to a side direction runner needle valve formula hot runner system suitable for injection mold.

Background

Needle valve gate type hot runner injection molds are widely used, namely, the opening and closing of a mold gate are controlled by the opening and closing action of a needle valve during injection molding, so that the on/off control of molten plastic is realized.

Currently, in the injection molding hot runner industry, the valve needle structure hot runner system is pressed in the horizontal plane direction to close the valve needle. However, the gates of many plastic products are distributed laterally, and the gates can only be rotated to the horizontal plane direction during the development of the mold, which results in a complex mold structure and a large increase in cost. Of course, some gates of plastic products are opened laterally, but the gate has the defects of gate quality, high injection pressure, unstable product size and the like. At present, the side gate valve pin type structure is few in the market, but the following problems exist: 1) the molten plastic channel and the valve needle are the same channel, and when the hot runner system is heated, the valve needle is easy to expand due to heating, so that the valve needle cannot smoothly run, and even is blocked and the like; 2) the plugging reliability and stability of the injection mold sprue are poor, and the material leakage phenomenon is easy to occur along with the extension of the injection molding time. Thus, a skilled person is urgently needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Therefore, in view of the above-mentioned problems and drawbacks, the present invention provides a lateral gate needle valve type hot runner system for an injection mold, which is designed to collect relevant data, evaluate and consider the data in multiple ways, and perform continuous experiments and modifications by a plurality of years of research and development experience technicians engaged in the industry.

In order to solve the technical problem, the utility model relates to a side direction runner needle valve formula hot runner system suitable for injection mold, it includes runner needle valve, molten plastic flow pipeline and drive unit. The gate needle valve is matched with the injection mold for use and comprises a valve body, a first lateral valve needle part, a second lateral valve needle part and a sliding driving block. The valve body is internally provided with a molten plastic flow passage. The molten plastic flow pipeline is inserted on the valve body and communicated with the molten plastic flow channel. The valve body is of a cavity structure, a cavity which is completely isolated from the molten plastic flow channel is arranged in the valve body, and a first mounting hole and a second mounting hole which are in positive alignment with a gate of the injection mold are formed in two adjacent side walls of the valve body. The first lateral needle valve part comprises a first needle and a first mounting sleeve. The first mounting sleeve is assembled in the first mounting hole and is used for the first valve needle to freely pass through along the axial direction of the first valve needle. The second lateral needle valve part comprises a second needle and a second mounting sleeve. The second mounting sleeve is assembled in the second mounting hole and is used for the second valve needle to freely pass through along the axial direction of the second valve needle. The first valve needle, the second valve needle and the sliding driving block are all arranged in the cavity. When the driving unit acts, the sliding driving block is driven to perform reciprocating sliding motion along the height direction, the first valve needle and the second valve needle all slide along the side wall of the sliding driving block all the time, the first valve needle is driven to perform reciprocating translational motion along the central axis of the first valve needle synchronously so as to insert/remove the first mounting sleeve matched with the first valve needle, and meanwhile, the second valve needle is driven to perform reciprocating translational motion along the central axis of the second valve needle synchronously so as to insert/remove the second mounting sleeve matched with the second valve needle.

As the utility model discloses technical scheme's further improvement, outwards extend respectively by the double-phase adjacent lateral wall of the drive block that slides and have first oblique direction sand grip, the second of sliding to put the direction sand grip to one side, correspondingly, be provided with on first needle with first oblique the first oblique recess that slides of direction sand grip looks adaptation of putting, be provided with on the second needle with the second oblique the second of direction sand grip looks adaptation of sliding to one side put the recess that slides.

As the utility model discloses technical scheme's further improvement, put on direction sand grip and the second is put to one side to the first direction sand grip that slides and first put to one side to slide recess and second put to one side and slide all to be provided with wear-resistant coating in the recess.

As a further improvement of the technical solution of the present invention, the driving unit preferably includes a linear driving element and a dowel bar. The dowel bar is vertically arranged, penetrates through the cavity and is connected with the sliding driving block. The dowel bar is independent from the molten plastic flow pipeline. The linear driving element is arranged right above the gate needle valve so as to drag the dowel bar to perform displacement motion along the height direction.

As a further improvement of the technical proposal of the utility model, the sprue needle valve also comprises a guide sleeve. The guide sleeve is detachably assembled on the upper plane of the valve body, and is provided with a sliding hole which is matched with the outer diameter of the dowel bar and is used for the dowel bar to freely pass through.

Compare in the side direction runner hot runner system of traditional project organization the utility model discloses an among the technical scheme for control injection mold runner on/off first needle, second needle all completely cut off with melting plastics circulation passageway mutually, so, can eliminate first needle, second needle effectively and lead to the emergence of self volume expansion phenomenon because of melting plastics circulation heat, and then avoided first needle and second needle to take place the jamming phenomenon in the motion process. In addition, the first valve needle and the second valve needle are driven simultaneously by the sliding driving block, so that the design form is simpler and easy to implement, the movement synchronism of the first valve needle and the second valve needle is effectively ensured, the sprue of the injection mold is reliably blocked, and the phenomenon of material leakage is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a side gate needle valve type hot runner system for an injection mold according to the present invention.

Fig. 2 is a perspective view of another view of the side-gate needle valve type hot runner system for an injection mold according to the present invention.

Fig. 3 is a schematic perspective view of a gate needle valve in a side gate needle valve type hot runner system of an injection mold according to the present invention.

Fig. 4 is an exploded view of the gate needle valve in the lateral gate needle valve type hot runner system of the present invention.

Fig. 5 is a front view of fig. 3.

Fig. 6 is a sectional view a-a of fig. 5.

Fig. 7 is a top view of fig. 3.

Fig. 8 is a schematic perspective view (with hidden lines visible) of a valve body in a side gate needle valve type hot runner system for an injection mold according to the present invention.

Fig. 9 is a schematic perspective view of a first valve needle in a side-gate needle valve type hot runner system for an injection mold according to the present invention.

Fig. 10 is a schematic perspective view of a second valve pin in a side-gate pin valve type hot runner system for an injection mold according to the present invention.

Fig. 11 is a schematic perspective view of a sliding driving block in a side gate needle valve type hot runner system of an injection mold according to the present invention.

Fig. 12 is a schematic perspective view of another view angle of the sliding driving block in the side-gate needle valve type hot runner system of the injection mold according to the present invention.

Fig. 13 is a front view of fig. 1.

Fig. 14 is a diagram of a state of the application of the side-gate needle valve type hot runner system of the present invention to an injection mold.

1-gate needle valve; 11-a valve body; 111-molten plastic flow channels; 112-a cavity; 113-a first mounting hole; 114-a second mounting hole; 12-a first lateral valve needle portion; 121-a first valve needle; 1211-a first inclined sliding groove; 122-a first mounting sleeve; 13-a second lateral valve needle portion; 131-a second valve needle; 1311-a second inclined sliding groove; 132-a second mounting sleeve; 14-a slipping driving block; 141-a first inclined sliding guide convex strip; 142-a second obliquely-arranged guide convex strip; 15-a guide sleeve; 2-a molten plastic flow line; 3-a drive unit; 31-a linear drive element; 32-dowel bars.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In order to facilitate the technical solution disclosed in the present invention to be fully understood by those skilled in the art, the following detailed description is made in conjunction with the specific embodiments, and fig. 1 and fig. 2 respectively show the three-dimensional schematic diagrams of two different viewing angles of the lateral gate needle valve type hot runner system applicable to the injection mold of the present invention, and it can be seen that the lateral gate needle valve type hot runner system mainly comprises a gate needle valve 1, a molten plastic flow pipeline 2, and a driving unit 3. The gate needle valve 1 is matched with an injection mold for use so as to realize the on/off control of a gate of the injection mold. The gate needle valve 1 is mainly composed of a valve body 11, a first lateral needle portion 12, a second lateral needle portion 13, a slide driving block 14, and the like. A molten plastic flow passage 111 is provided in the valve body 11. The molten plastic flow pipe 2 is inserted into the valve body 11 and is communicated with the molten plastic flow passage 111. The valve body 11 is a cavity structure, and has a cavity 112 completely isolated from the molten plastic flow channel 111, and two adjacent sidewalls thereof are provided with a first mounting hole 113 and a second mounting hole 114 which are aligned with the gate of the injection mold. The first lateral needle valve portion 12 includes a first needle 121 and a first mounting sleeve 122. The first mounting sleeve 122 is fitted in the first mounting hole 113 and freely passes through the first valve needle 121 in the axial direction thereof. The second lateral needle valve portion 13 includes a second needle 131 and a second mounting sleeve 132. The second mounting sleeve 132 is fitted in the second mounting hole 114 and allows the second valve needle 131 to freely pass therethrough in the axial direction thereof. The first valve needle 121, the second valve needle 131 and the sliding drive block 14 are all disposed in the cavity 112. When the driving unit 3 is operated, the sliding driving block 14 is driven to perform reciprocating sliding motion along the height direction, the first valve needle 121 and the second valve needle 131 both always perform sliding motion along the side wall of the sliding driving block 14, the first valve needle 121 is driven to perform synchronous reciprocating translational motion along the central axis thereof so as to insert/remove the first mounting sleeve 122 adapted thereto, and at the same time, the second valve needle 131 is driven to perform synchronous reciprocating translational motion along the central axis thereof so as to insert/remove the second mounting sleeve 132 adapted thereto (as shown in fig. 3, 4, 5, 6, 7, and 8).

Through adopting above-mentioned technical scheme to set up, this side direction runner needle valve formula hot runner system suitable for injection mold produces at least and has following beneficial technological effect:

1) the first valve needle 121 and the second valve needle 131 for controlling the opening/closing of the gate of the injection mold are isolated from the molten plastic flowing channel 111, so that the phenomenon of volume expansion of the first valve needle 121 and the second valve needle 131 caused by the flowing heat 111 of the molten plastic can be effectively eliminated, and the phenomenon of clamping stagnation of the first valve needle 121 and the second valve needle 131 in the moving process is further avoided.

2) The sliding driving block 14 is adopted to drive the first valve needle 121 and the second valve needle 131 simultaneously, so that the movement synchronism of the first valve needle 121 and the second valve needle 131 is effectively ensured, the sprue of the injection mold is reliably blocked, and the phenomenon of material leakage is avoided.

It is known that the gate needle valve 1 can adopt various design structures to realize the synchronous driving of the first valve needle 121 and the second valve needle 131 by the driving sliding block 14, but an embodiment with simple design structure, easy implementation and extremely low operation failure rate is recommended here, and is specifically as follows: preferably, a first inclined sliding guiding protrusion 141 and a second inclined guiding protrusion 142 extend from two adjacent side walls of the sliding driving block 14, and correspondingly, a first inclined sliding groove 1211 adapted to the first inclined sliding guiding protrusion 141 is disposed on the first valve needle 121, and a second inclined sliding groove 1311 adapted to the second inclined sliding guiding protrusion 142 is disposed on the second valve needle 131 (as shown in fig. 4, 5, 6, 7, 9, 10, 11, and 12). When the sliding driving block 14 moves up and down under the driving force of the driving unit 3, the first inclined sliding groove 1211 and the second inclined sliding groove 1311 respectively perform directional sliding movement along the first inclined sliding guiding protrusion 141 and the second inclined sliding guiding protrusion 142 in a one-to-one correspondence manner, that is, the first valve needle 121 and the second valve needle 131 are driven to synchronously retract/extend, thereby implementing on/off control of the gate of the injection mold.

After a period of application, the sliding surfaces matched between the first inclined sliding guiding protrusion 141 and the first inclined sliding groove 1211, and between the second inclined sliding guiding protrusion 142 and the second inclined sliding groove 1311 are worn, which causes an assembly gap between the opposite sliding surfaces to be out of tolerance, and further affects the displacement accuracy and the displacement synchronism of the first valve needle 121 and the second valve needle 131, and finally affects the reliability and the stability of the gate plugging of the injection mold. In view of this, a wear-resistant coating (not shown) may be further provided on the first and second inclined sliding guide ribs 141 and 142 and in the first and second inclined sliding grooves 1211 and 1311. The existence of the wear-resistant coating can effectively slow down the wear speed of the sliding surfaces on the sliding driving block 14, the first valve needle 121 and the second valve needle 131, namely indirectly prolong the service life of the gate needle valve 1; on the other hand, the friction coefficient between the sliding surfaces is greatly reduced, and the smoothness of the sliding operation of the first valve needle 121 relative to the sliding driving block 14 and the second valve needle 131 relative to the sliding driving block 14 is effectively improved.

In traditional design, the drive unit is direct to be integrated as an organic whole with the runner needle valve, and not only directly lead to the self of runner needle valve bulky, overweight, be unfavorable for subsequent assembly, the operation fault rate is higher moreover, and the later stage is not convenient for maintain, reprocess. In view of this, a preferred solution is proposed here, in particular as follows: as shown in fig. 13, the drive unit 3 preferably comprises a linear drive element 31 and a dowel 32. The dowel bar 32 is vertically arranged, penetrates through the cavity 112 and is connected with the sliding driving block 14. The dowel 31 is independent of the molten plastic flow line 2. The linear driving element 31 is disposed directly above the gate needle valve 1 to drag the dowel bar 32 for a displacement motion in the height direction.

As shown in fig. 2, 3, 4 and 5, the gate needle valve 1 may be additionally provided with a guide sleeve 15 according to the customer requirements and different practical application scenarios. The guide sleeve 15 is detachably assembled on the upper plane of the valve body 11, and is provided with a sliding hole which is matched with the outer diameter of the dowel bar 32 and through which the dowel bar 32 freely passes. In this way, the guide sleeve 15 always guides the force transmission rod 32 in the process of sliding along the vertical direction, so that the directionality of the displacement motion of the force transmission rod 32 is ensured, and the accurate dragging of the sliding driving block 14 is realized.

Fig. 14 shows a state diagram of the practical application of the side gate needle valve type hot runner system for injection mold of the present invention, which is mostly used in a set, and cooperates to realize the on/off control of the gate of the injection mold.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A side gate needle valve type hot runner system suitable for an injection mold is characterized by comprising a gate needle valve, a molten plastic flow pipeline and a driving unit; the gate needle valve is matched with the injection mold for use and comprises a valve body, a first lateral valve needle part, a second lateral valve needle part and a sliding driving block; a molten plastic flow channel is formed in the valve body; the molten plastic flow pipeline is inserted in the valve body and communicated with the molten plastic flow channel; the valve body is of a cavity structure, a cavity which is completely isolated from the molten plastic flow channel is arranged in the valve body, and a first mounting hole and a second mounting hole which are in positive alignment with a gate of the injection mold are formed in two adjacent side walls of the valve body; the first lateral needle valve part comprises a first needle and a first mounting sleeve; the first mounting sleeve is assembled in the first mounting hole and is used for the first valve needle to freely pass through along the axial direction of the first valve needle; the second lateral needle valve part comprises a second needle and a second mounting sleeve; the second mounting sleeve is assembled in the second mounting hole and is used for the second valve needle to freely pass through along the axial direction of the second valve needle; the first valve needle, the second valve needle and the sliding driving block are all arranged in the cavity; when the driving unit acts, the sliding driving block is driven to perform reciprocating sliding motion along the height direction, the first valve needle and the second valve needle always slide along the side wall of the sliding driving block, the first valve needle is driven to perform synchronous reciprocating translational motion along the central axis of the first valve needle so as to insert/remove the first mounting sleeve matched with the first valve needle, and meanwhile, the second valve needle is driven to perform synchronous reciprocating translational motion along the central axis of the second valve needle so as to insert/remove the second mounting sleeve matched with the second valve needle.

2. The side-gated pin valve type hot runner system suitable for an injection mold of claim 1, wherein a first inclined sliding guiding protrusion and a second inclined guiding protrusion extend from two adjacent side walls of the sliding driving block, respectively, and correspondingly, a first inclined sliding groove adapted to the first inclined sliding guiding protrusion is formed on the first valve pin, and a second inclined sliding groove adapted to the second inclined sliding guiding protrusion is formed on the second valve pin.

3. The side-gated pin-gated hot runner system for use in an injection mold of claim 2, wherein a wear resistant coating is disposed on each of said first and second diagonal slide guide ribs and within each of said first and second diagonal slide grooves.

4. A side-gated needle valve hot-runner system for an injection mold as claimed in any one of claims 1-3, wherein said drive unit comprises a linear drive element and a dowel; the dowel bar is vertically arranged, penetrates through the cavity and is connected with the sliding driving block; the dowel bar and the molten plastic flow pipeline are mutually independent; the linear driving element is arranged right above the sprue needle valve to drag the dowel bar to perform displacement motion along the height direction.

5. The side-gated needle valve hot runner system for use with an injection mold of claim 4, wherein said gated needle valve further comprises a guide sleeve; the guide sleeve is detachably assembled on the upper plane of the valve body, and is provided with a sliding hole which is matched with the outer diameter of the dowel bar and through which the dowel bar freely passes.

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