CN215619702U

CN215619702U - Runner structure of rubber mold

Info

Publication number: CN215619702U
Application number: CN202121925132.7U
Authority: CN
Inventors: 谢超伟
Original assignee: Ningbo Lary Industrial Machinery Co ltd
Current assignee: Ningbo Lary Industrial Machinery Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2022-01-25
Anticipated expiration: 2031-08-17

Abstract

The utility model discloses a runner structure of a rubber mold, which comprises a runner plate connected with a hot plate on the mold, wherein the upper end of the runner plate is provided with a feed hole, the lower end of the runner plate is provided with at least two vertically extending discharge nozzles which are distributed at intervals, the upper ends of the discharge nozzles are communicated with the feed hole, and the lower ends of the discharge nozzles are communicated with a feed inlet of an upper mold; the upper end of the inner hole of the discharge nozzle is a cylindrical hole, and the lower end of the inner hole of the discharge nozzle is a first conical hole with the aperture gradually increasing from top to bottom. The runner structure of the rubber mold disclosed by the utility model has the advantages of less waste, raw material saving and convenience in separation of product stub bars.

Description

Runner structure of rubber mold

Technical Field

The utility model relates to the technical field of rubber molds, in particular to a runner structure of a rubber mold.

Background

The rubber mold of the conventional vulcanized rubber sole generally comprises an upper hot plate, an upper mold, a lower mold and a lower hot plate from top to bottom in sequence, a mold cavity can be formed between the upper mold and the lower mold, a runner plate is arranged between the upper hot plate and the upper mold, an upper mold feeding port communicated with the mold cavity is arranged on the upper mold, a product with a corresponding shape is formed after rubber enters the mold cavity through high-pressure injection of a runner in the runner plate, and then the rubber is vulcanized to form a final product through heating of the upper hot plate and the lower hot plate.

In the existing rubber mold structure, when multiple cavities of a mold are involved, a common main feeding port is usually arranged at the upper end of a flow channel plate, a plurality of branch feeding ports corresponding to the positions of the cavities are arranged in the flow channel plate, the main feeding port is communicated with the branch feeding ports through flow channels, and corresponding waste materials are generated in the flow channels from an injection system to the cavities in the structure. In addition, in the existing rubber mold, after a product is molded, a stub bar is generated at the position of the product close to the branch material outlet, the stub bar is not easy to separate from the tail end of the branch material outlet of the runner plate, and the demolding is difficult.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the runner structure of the rubber mold, which has the advantages of less waste, raw material saving and convenience in separation of product stub bars.

The utility model adopts a technical scheme that: the runner structure of the rubber mold comprises a runner plate connected to an upper hot plate of the mold, wherein the upper end of the runner plate is provided with a feed hole, the lower end of the runner plate is provided with at least two vertically extending discharge nozzles which are distributed at intervals, the upper ends of the discharge nozzles are communicated with the feed hole, and the lower ends of the discharge nozzles are communicated with a feed hole of an upper mold; the upper end of the inner hole of the discharge nozzle is a cylindrical hole, and the lower end of the inner hole of the discharge nozzle is a first conical hole with the aperture gradually increasing from top to bottom.

Compared with the prior art, the cold runner device has the following advantages:

in the cold runner device, the runner plate is provided with the feeding hole and at least two discharge nozzles, namely the cold runner device is applied to a multi-cavity structure of a mold, the structure is communicated with each molding cavity and is provided with the corresponding discharge nozzles, the sizing material in the upper mold is fed from the feeding hole and then is injected into the corresponding molding cavity through the corresponding discharge nozzles, and one end of an inner hole of each discharge nozzle close to the molding cavity is provided with a tapered hole with a small hole diameter and a large hole diameter, so that when a product in the molding cavity is demolded, a stub bar at an injection port is separated from the tapered hole from top to bottom with small resistance, and the separation is convenient; and under the condition of adopting the structure and the latter mould with multiple cavities, the waste generated in the flow channel is less, and only a small section of waste in the conical hole is generated, so that the raw material is saved.

As an improvement, one end of the discharge nozzle, which is close to the injection flow passage, is provided with a second taper hole with the aperture gradually increasing from bottom to top, and the cylindrical hole is arranged between the first taper hole and the second taper hole. In the improved structure, the upper end of the discharge nozzle is provided with a tapered hole with a large upper aperture and a small lower aperture, so that the rubber in the flow channel can conveniently enter the discharge nozzle; on the other hand, when the product is demoulded, the stub bar in the conical hole at the lower end of the discharging nozzle needs to be pulled apart, and a section of cylindrical hole is arranged between two reversely arranged conical holes in the structure, so that the stub bar can be pulled apart from the cylindrical position more conveniently when the stub bar is separated.

In a further improvement, the lower end of the runner plate is provided with two discharging nozzles which are symmetrically distributed along the length direction of the runner plate; the runner plate is provided with an injection runner for communicating the feeding hole with the two discharging nozzles; the two ends of the flow channel plate in the length direction are provided with process holes communicated with the horizontal channel of the injection flow channel, a plug is arranged in each process hole, a first channel coaxial with the horizontal channel and a second channel coaxial with the cylindrical hole of the discharge nozzle are arranged on each plug, and the first channel and the second channel are in transition through an arc section. In the above-mentioned improvement structure, be equipped with the fabrication hole that is used for processing injection runner respectively at the both ends of runner plate, processing is accomplished the back, can block up the end cap in the fabrication hole position, set up the transition runner that is used for communicateing injection runner and ejection of compact nozzle on the end cap, and the corner position at the transition runner is the circular arc changeover portion, thereby can reduce the frictional resistance when sizing material passes through the corner position, the sizing material can not take place the condition of gathering yet in the corner position, thereby it is smooth and easy to make the sizing material ejection of compact in the runner, difficult waste material that produces.

In a further improvement, the lower end of the runner plate is provided with a threaded hole which is communicated with the injection runner and is used for threaded connection of a discharging nozzle; and one end of the threaded hole, which is close to the injection flow passage, is provided with a positioning hole, and the discharge nozzle is provided with a positioning column matched with the positioning hole. In the improved structure, the discharging nozzle is detachably connected with the runner plate in a threaded connection mode, so that the discharging nozzle is more convenient to disassemble and assemble when the rubber material in the runner needs to be cleaned; and corresponding positioning holes and positioning columns are further arranged, so that the connection stability and position accuracy of the discharging nozzle and the runner plate are improved, and the discharging nozzle is accurately matched with a lower die during injection molding of die-closing rubber materials.

In another improvement, the lower end of the runner plate is provided with a cooling groove which is folded back and extends along the width direction of the runner plate in a reciprocating way, and the depth direction of the cooling groove extends towards the injection runner; and the lower end of the runner plate is provided with a sealing plate for sealing the cooling groove to form a cooling channel. In the improved structure, the cooling channel is also arranged in the runner plate, so that the rubber material in the runner is prevented from being heated and vulcanized, the generation of waste materials is further avoided, and the raw materials are saved.

And the lower end of the runner plate is provided with a matching groove for accommodating the sealing plate, and when the sealing plate is arranged in the matching groove, the lower end surface of the sealing plate is flush with the lower end surface of the runner plate. Make the lower terminal surface of runner plate more parallel and level after setting up like this to the closing plate can also play the effect of location through the supporting groove when connecting fixedly.

Drawings

Fig. 1 is a schematic half-sectional view of a runner structure of a rubber mold of the present invention.

Fig. 2 is an enlarged schematic diagram at X in fig. 1.

FIG. 3 is a structural view of the discharge nozzle in the present invention.

Wherein shown in the figure: 1-flow channel plate, 1.1-feeding hole, 1.2-injection flow channel, 1.3-threaded hole, 1.3.1-positioning hole, 1.4-cooling groove, 1.5-assembling groove, 2-discharging nozzle, 2.1-cylindrical hole, 2.2-first conical hole, 2.3-second conical hole, 2.4-positioning column, 3-end plug, 3.1-first channel and 3.2-second channel.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

In the description of the present invention, it should be noted that the terms "upper end", "lower end", "upper, lower", "both ends", etc., 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 referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. It should also be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-3, the present invention provides a runner structure of a rubber mold, including a runner plate 1, specifically, the runner plate 1 is connected to an upper hot plate of the mold, a feeding hole 1.1 is provided at an upper end of the runner plate 1, at least two discharging nozzles 2 distributed at intervals are provided at a lower end of the runner plate 1, the discharging nozzles 2 extend along a vertical direction of the mold, the feeding holes 1.1 at upper ends of the discharging nozzles 2 are communicated, and a lower end of the discharging nozzle 2 is communicated with a feeding hole of an upper mold, that is, a rubber material in the upper hot plate passes through the feeding hole 1.1 on the runner plate 1, then is divided into each corresponding discharging nozzle 2, and then is injected into each corresponding mold cavity through each discharging nozzle 2; the upper end of the inner hole of the discharging nozzle 2 in the structure is a cylindrical hole 2.1, and the lower end of the inner hole of the discharging nozzle 2 is a first conical hole 2.2 with the aperture gradually increasing from top to bottom.

In this embodiment, as shown in fig. 3, the lower end of the discharging nozzle 2 is provided with a second tapered hole 2.3 whose aperture gradually increases from bottom to top, the cylindrical hole 2.1 is arranged between the first tapered hole 2.2 and the second tapered hole 2.3, so that the stub bar in the first tapered hole 2.2 at the lower end of the discharging nozzle 2 is conveniently pulled off from the cylindrical hole 2.1, the stub bar part for facilitating product molding is separated from the runner plate 2, and the structure generates less waste materials, thereby saving raw materials.

Preferably, in the structure, two discharging nozzles 2 which are symmetrically distributed along the length direction of the flow channel plate 1 are arranged at the lower end of the flow channel plate; the runner plate 1 is provided with an injection runner 1.2 for communicating the feed hole 1.1 with the two discharge nozzles 2; the two ends of the flow channel plate 1 in the length direction are provided with fabrication holes communicated with the horizontal channel of the injection flow channel 1.2, the fabrication holes are mainly used for processing the horizontal channel, a plug 3 needs to be plugged in the fabrication holes after the processing is finished, and particularly, the plug 3 and the flow channel plate 1 are fixedly connected in a welding mode. In addition, in the structure of the injection mold, the discharging nozzle 2 is vertically arranged, so that a section of vertical channel which is perpendicular to the horizontal channel is arranged in the runner plate 1, the corner position of the horizontal channel and the vertical channel in the existing structure is generally approximate to a right-angle structure, and when the rubber material of the injection runner 1.2 flows, the rubber material is easy to accumulate at the corner position, so that the flowing rate of the rubber material at the later stage is influenced, the product molding efficiency is influenced, and corresponding waste materials can be generated at the corner position. In this embodiment, in order to effectively solve the problem, the plug 3 is provided with a first channel 3.1 coaxial with the horizontal channel and a second channel 3.2 coaxial with the cylindrical hole 2.1 of the discharge nozzle 2, and the first channel 3.1 and the second channel 3.2 are transited through an arc segment. After the arrangement, when the rubber material passes through the corner positions of the horizontal channel and the vertical channel, the rubber material is not accumulated, the rubber material flows smoothly, and the product forming efficiency is high.

In addition, in this embodiment, be equipped with at runner plate 1 lower extreme and inject runner 1.2 intercommunication and be used for supplying discharge nozzle 2 threaded connection's screw hole 1.3, discharge nozzle 2 can be dismantled through the threaded connection mode with runner plate 1 and be connected, easy dismounting. One end of the threaded hole 1.3 close to the injection runner 1.2 is provided with a positioning hole 1.3.1, and the discharging nozzle 2 is provided with a positioning column 2.4 matched with the positioning hole 1.3.1, so that accurate position limitation when the discharging nozzle 2 is connected with the runner plate 1 is realized.

As shown in fig. 2, a cooling groove 1.4 extending back and forth along the width direction is provided at the lower end of the flow channel plate 1, and the depth direction of the cooling groove 1.4 extends toward the injection flow channel 1.2; the lower end of the flow channel plate 1 is provided with a sealing plate 4 for covering the cooling channel 1.4 to form a cooling channel. More specifically, the lower end of the flow path plate 1 is provided with a fitting groove 1.5 for receiving the sealing plate 4, and when the sealing plate 4 is mounted in the fitting groove 1.5, the lower end surface of the sealing plate 4 is flush with the lower end surface of the flow path plate 1. In the structure, the corresponding cooling channel is further added in the runner plate 1, so that the rubber material in the injection runner 1.2 is effectively prevented from being heated and vulcanized, the generation of waste materials is further avoided, and the raw materials are saved.

The foregoing has described preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and various changes made within the scope of the claims of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a runner structure of rubber mold which characterized in that: the hot plate die comprises a runner plate (1) connected to a hot plate on a die, wherein a feed hole (1.1) is formed in the upper end of the runner plate (1), at least two vertically extending discharge nozzles (2) are arranged at the lower end of the runner plate (1) at intervals, the upper ends of the discharge nozzles (2) are communicated with the feed hole (1.1), and the lower ends of the discharge nozzles (2) are communicated with a feed inlet of an upper die; the upper end of the inner hole of the discharging nozzle (2) is a cylindrical hole (2.1), and the lower end of the inner hole of the discharging nozzle (2) is a first conical hole (2.2) with the aperture gradually increasing from top to bottom.

2. The runner structure of a rubber mold according to claim 1, characterized in that: the upper end of discharge nozzle (2) is equipped with second taper hole (2.3) that the aperture increases gradually from bottom to top, establish between first taper hole (2.2) and second taper hole (2.3) cylinder hole (2.1).

3. The runner structure of a rubber mold according to claim 1 or 2, characterized in that: the lower end of the runner plate (1) is provided with two discharging nozzles (2) which are symmetrically distributed along the length direction of the runner plate; the runner plate (1) is provided with an injection runner (1.2) for communicating the feed hole (1.1) with the two discharge nozzles (2); the injection runner structure is characterized in that process holes communicated with a horizontal channel of an injection runner (1.2) are formed in two ends of the runner plate (1) in the length direction, a plug (3) is arranged in each process hole, a first channel (3.1) coaxial with the horizontal channel and a second channel (3.2) coaxial with a cylindrical hole (2.1) of a discharge nozzle (2) are arranged on each plug (3), and the first channel (3.1) and the second channel (3.2) are in transition through arc sections.

4. The runner structure of a rubber mold according to claim 1, characterized in that: the lower end of the runner plate (1) is provided with a threaded hole (1.3) which is communicated with the injection runner (1.2) and is used for the threaded connection of the discharging nozzle (2); one end of the threaded hole (1.3) close to the injection flow channel (1.2) is provided with a positioning hole (1.3.1), and the discharging nozzle (2) is provided with a positioning column (2.4) matched with the positioning hole (1.3.1).

5. The runner structure of a rubber mold according to claim 1, characterized in that: the lower end of the runner plate (1) is provided with a cooling groove (1.4) which is folded back and extended back and forth along the width direction of the runner plate, and the depth direction of the cooling groove (1.4) extends towards the injection runner (1.2); the lower end of the runner plate (1) is provided with a sealing plate (4) for sealing the cooling groove (1.4) to form a cooling channel.

6. The runner structure of a rubber mold according to claim 5, characterized in that: the lower extreme of runner plate (1) is equipped with and is used for holding joining in marriage mounting groove (1.5) of closing plate (4), and works as when closing plate (4) are installed in joining in marriage mounting groove (1.5), the lower terminal surface of closing plate (4) is parallel and level mutually with runner plate (1) lower terminal surface.