CN218576877U

CN218576877U - Improved structure of pipe fitting sprue semi-hot runner

Info

Publication number: CN218576877U
Application number: CN202222932200.3U
Authority: CN
Inventors: 寇官祥; 马超; 蒋科
Original assignee: Sichuan Zhongcai Pipeline Co ltd
Current assignee: Sichuan Zhongcai Pipeline Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-03-07
Anticipated expiration: 2032-11-04

Abstract

The utility model provides an improvement structure of pipe fitting runner half hot runner belongs to injection mold equipment technical field. The electric heating die comprises a die body, wherein a sprue bush is fixedly arranged on the die body, a first electric heating wire is spirally embedded on the outer wall of the sprue bush and is electrically connected with a power supply through a connecting wire. When an injection molding machine is used for injecting molten materials into the mold body, the molten materials are heated through the first heating wire on the outer surface of the sprue bush, the sprue bush can be heated, the temperature of the sprue bush is kept, the molten materials in the sprue bush are kept in a flowing state, after the molten materials in the mold body are cooled and shaped, when a product is ejected out through the ejector pins on the mold body, the plastic in the runner at the sprue bush position is disconnected from the opening of the sprue bush extending into the mold body, and waste materials remained in the sprue bush in the injection molding process are effectively reduced. Has the effect of improving the utilization rate of raw materials.

Description

Improved structure of pipe fitting sprue semi-hot runner

Technical Field

The utility model relates to an injection mold equipment technical field especially relates to a pipe fitting runner half hot runner's improvement structure.

Background

Injection molding is a method for producing and molding industrial plastic products. The injection molding process is to add granular or powdery plastic into a charging barrel of an injection molding machine, the plastic is heated and melted and then pushed by a screw of the injection molding machine at high pressure and high speed, the molten plastic is quickly injected into a closed mold cavity, and the plastic filled in the mold cavity is cooled and solidified under the pressure state to keep the shape given by the mold cavity, thereby completing the molding process of plastic products.

In the process of taking out the injection-molded product, the plastic located at the runner of the injection mold is usually cooled and molded together with the product, so that the taken-out product is usually provided with sprue wastes generated by the runner residue from the injection mold. The waste of the pouring opening cannot be applied to products and needs to be removed, so that the waste of injection molding raw materials is caused, and the cost of injection molding is increased.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an improved structure of a pipe fitting gate semi-hot runner.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

the utility model provides an improvement structure of half hot runner of pipe fitting runner, includes the mould body, and the fixed runner cover that is provided with on the mould body, the spiral inlays on the outer wall of runner cover and is equipped with first heating wire, and first heating wire passes through the connecting wire and is connected with the power electricity.

Furthermore, a fixing groove used for containing the connecting wire is formed in the die body, an opening of the fixing groove is fixedly connected with a separation blade used for fixing the connecting wire through a bolt, and the separation blade is provided with a plurality of separation blades at intervals along the length direction of the fixing groove.

Furthermore, the first electric heating wire is externally connected with a temperature control box.

Further, can dismantle on the outer wall of mould body and be connected with the connecting block, the inside runner that has seted up of connecting block, seted up a feed inlet and two at least discharge gates on the connecting block, feed inlet and discharge gate all communicate with the runner, the feed inlet is used for connecting the injection molding machine nozzle, the one end that mould body was kept away from to the runner cover is connected in the discharge gate and is communicated with the runner, be provided with the second heating wire on the outer wall of connecting block.

Further, be provided with the drainage tube of copper in the runner, be equipped with the connector that is used for feed inlet and discharge gate on the intercommunication connecting block on the drainage tube, be provided with a plurality of conducting strip in the connecting block, the one end and the second heating wire butt of conducting strip, the other end and drainage tube butt.

Furthermore, the connecting block is embedded with a cover plate fixedly connected with the outer wall provided with the second heating wire through a bolt, and a heat preservation strip used for being in contact with the second heating wire is arranged on one surface, close to the connecting block, of the cover plate.

Furthermore, the connecting port is set to be conical, the top end of the sprue bush is in threaded connection with the discharge port of the connecting block, and the top end of the sprue bush is provided with a clamping connector which is elastically matched with the connecting port.

The utility model has the advantages that: when the injection molding machine is adopted to inject the molten material into the mold body, the molten material is heated through the first heating wire on the outer surface of the sprue bush, the sprue bush can be heated, the temperature of the sprue bush is kept, the molten material in the sprue bush is kept in a flowing state, after the molten material in the mold body is cooled and shaped, when a product is ejected out through the ejector pins on the mold body, the plastic in the runner at the sprue bush position extends into the opening of the mold body from the sprue bush to be disconnected, the waste material remained in the sprue bush in the injection molding process is effectively reduced, and the waste of raw materials is reduced.

Drawings

Fig. 1 is an overall structural schematic diagram of a mounting state of a die body and a connecting block according to an embodiment of the present application.

Fig. 2 is a schematic view of the overall structure of the connection block according to the embodiment of the present application.

Fig. 3 isbase:Sub>A partial plan sectional view of portionbase:Sub>A-base:Sub>A of fig. 2.

Fig. 4 is an exploded view of a connection block according to an embodiment of the present invention.

Wherein, 1, a mould body; 11. fixing grooves; 12. a baffle plate; 2. a sprue bush; 21. a first heating wire; 3. connecting blocks; 31. a flow channel; 32. a feed inlet; 33. a discharge port; 34. a second heating wire; 4. a drainage tube; 41. a heat conductive sheet; 42. a connecting port; 43. a cover plate; 44. a heat-insulating strip; 45. and (4) clamping a connector.

Detailed Description

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

The embodiment of the application discloses half hot runner's of pipe fitting runner improvement structure, refer to fig. 1, 2, including mould body 1 and runner cover 2, runner cover 2 passes through bolt and 1 fixed connection of mould body, and the inside through-hole of offering the confession molten plastic of lining up of runner cover 2 passes through, and the one end of through-hole stretches into in the mould body 1 and communicates with the inside die cavity of mould body 1. In the embodiment of the present application, the first heating wire 21 is spirally embedded on the outer wall of the sprue bush 2, the outer wall of the first heating wire 21 is flush with the outer wall of the sprue bush 2, and the first heating wire 21 is electrically connected with a power supply.

Through switching on first heating wire 21, make first heating wire 21 themogenesis, then can heat runner cover 2, keep the plastics melt temperature in the through-hole in runner cover 2, after the finished piece cooling shaping in the mould body 1, ejecting the drawing of patterns of finished piece by the setting-out pole in the mould, during the drawing of patterns, the finished piece goes up runner waste material and follows the terminal disconnection of 2 exports of runner cover to effectively avoided the plastics in runner cover 2 to become the waste material, improved the utilization ratio of the raw materials of moulding plastics.

In this application embodiment, set up on the mould body 1 by fixed slot 11, the one end of fixed slot 11 is connected into and is used for installing the through-hole of runner cover 2 on the mould body 1, the connecting wire embedding fixed slot 11 of being connected with first heating wire 21 on the runner cover 2 is in, and walk the line along fixed slot 11, pass through bolt fixed mounting on the fixed slot 11 by separation blade 12, separation blade 12 spans the opening of fixed slot 11, separation blade 12 is arranged in the connecting wire in fixed slot 11, in order to improve the installation stability of connecting wire, separation blade 12 is equipped with a plurality of pieces along the length direction interval of fixed slot 11.

Further, the first heating wire 21 is externally connected to a temperature control box (not shown), which can limit the current in the first heating wire 21 and maintain the heating temperature of the first heating wire 21 to the sprue bush 2. The plastic melt in the sprue bush 2 can be effectively prevented from being cooled and solidified, and the fluidity of the plastic melt is kept.

Referring to fig. 3 and 4, further, in order to be suitable for pressing a plurality of workpieces in the same mold, the outer wall of the mold body 1 is detachably connected with a connecting block 3, a flow channel 31 is arranged inside the connecting block 3, and the connecting block 3 is provided with a feed inlet 32 communicated with the flow channel 31 and at least two discharge outlets 33. In the embodiment of the present application, two discharge ports 33 are provided, the feed port 32 is used for connecting with a nozzle of an injection molding machine, a sprue bush 2 is connected to each discharge port 33, and a through hole of the sprue bush 2 is communicated with the flow channel 31 in the connecting block 3. The outer wall of the connecting block 3 is provided with a second heating wire 34 around the circumference of the connecting block 3, and the second heating wire 34 is externally connected with a power supply.

The injection molding machine injects plastics into the flow channel 31 from the feed inlet 32 on the connecting block 3, the second heating wire 34 heats the connecting block 3, the fluidity of the plastic melt in the flow channel 31 in the connecting block 3 is kept, the plastic melt flows to each discharge port 33 along the flow channel 31, and then flows to each cavity in the mold body 1 from the sprue bush 2, so that the injection molded part is completed.

Further, in order to improve the heating effect of the second heating wire 34 on the plastic melt in the flow channel 31, a drainage tube 4 is installed in the connection block 3 in the embodiment of the present application, the drainage tube 4 is made of copper, the drainage tube 4 is provided with a plurality of connection ports 42, the connection ports 42 correspond to the feed ports 32 and the discharge ports 33 on the connection block 3 one by one, and the connection ports 42 are communicated with the feed ports 32 or the discharge ports 33. The connecting block 3 is provided with a heat conducting strip 41, the heat conducting strip 41 is made of copper, one end of the heat conducting strip 41 is abutted with the second heating wire 34, and the other end of the heat conducting strip extends into the flow channel 31 and is abutted with the outer wall of the drainage tube 4.

When the second heating wire 34 generates heat, the heat generated by the second heating wire 34 is conducted through the heat conducting sheet 41, and then the heat is directly conducted to the outer wall of the drainage tube 4, so that the plastic fusant in the drainage tube 4 can be rapidly heated, and the heat utilization rate of the second heating wire 34 is high. In order to clean the plastic melt in the drainage tube 4, the connecting block 3 can be arranged to be a detachable structure which is separated from the upper part and the lower part, when the cleaning is needed, the connecting block 3 is untied, and the drainage tube 4 is cleaned.

Further, in order to improve the heat utilization rate of second heating wire 34, adopt bolt fixedly connected with apron 43 on the outer wall of connecting block 3, the one side that apron 43 is close to connecting block 3 has heat preservation strip 44 through bonding fixed mounting, and heat preservation strip 44 can adopt the asbestos heat preservation material, and heat preservation strip 44 laminates on the outer wall of second heating wire 34, can effectively prevent that second heating wire 34 heat outwards scatters and disappears.

In the embodiment of the present application, the inner opening of the connection port 42 is set to be conical, the top end of the sprue bush 2 is in threaded connection with the discharge port 33 of the connection block 3, and the top end of the sprue bush 2 is provided with a clamping head 45 for elastically matching with the connection port 42. The clamping connector 45 is designed to be an elastic clamping ring folded outwards, the elastic clamping ring is in contact with an inner opening of the connecting port 42, when the sprue bush 2 is in threaded connection with the connecting block 3, the inlet of the sprue bush 2 is in elastic clamping contact with a conical inner opening of the connecting port 42, and the connection sealing performance between the sprue bush 2 and the drainage tube 4 can be effectively ensured through extrusion deformation.

The implementation principle of the improved structure of the pipe fitting gate semi-hot runner in the embodiment of the application is as follows: when the injection molding machine is used for injecting the molten material into the mold body 1, the first heating wire 21 on the outer surface of the sprue bush 2 is used for heating, the sprue bush 2 can be heated, the temperature of the sprue bush 2 is kept, the molten material in the sprue bush 2 is kept in a flowing state, after the molten material in the mold body 1 is cooled and shaped, when a product is ejected by an upper thimble of the mold body 1, the plastic in a runner 31 at the sprue bush 2 extends into the opening of the mold body from the sprue bush 2, the plastic is effectively reduced, the waste remained in the sprue bush 2 in the injection molding process is effectively reduced, and the waste of raw materials is reduced.

It should be apparent to those skilled in the art that while the preferred embodiments of the present invention have been described, additional variations and modifications to these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An improved structure of a pipe fitting sprue semi-hot runner is characterized in that: the die comprises a die body (1), wherein a sprue bush (2) is fixedly arranged on the die body (1), a first electric heating wire (21) is spirally embedded on the outer wall of the sprue bush (2), and the first electric heating wire (21) is electrically connected with a power supply through a connecting wire;

the outer wall of the die body (1) is detachably connected with a connecting block (3), a flow channel (31) is formed in the connecting block (3), a feed port (32) and at least two discharge ports (33) are formed in the connecting block (3), the feed port (32) and the discharge ports (33) are both communicated with the flow channel (31), the feed port (32) is used for connecting a nozzle of an injection molding machine, one end, far away from the die body (1), of the sprue bush (2) is connected into the discharge ports (33) and communicated with the flow channel (31), and a second electric heating wire (34) is arranged on the outer wall of the connecting block (3);

the connecting block (3) is arranged to be of a detachable structure which is separated vertically, a copper drainage tube (4) is arranged in the flow channel (31), a connecting port (42) used for communicating an upper feeding port (32) and a discharging port (33) of the connecting block (3) is formed in the drainage tube (4), a plurality of heat conducting fins (41) are arranged in the connecting block (3), one end of each heat conducting fin (41) is abutted to the second heating wire (34), and the other end of each heat conducting fin is abutted to the drainage tube (4);

the heating wire connecting structure is characterized in that a cover plate (43) is fixedly connected to the outer wall, provided with the second heating wire (34), of the connecting block (3) in an embedded mode, and a heat preservation strip (44) used for being in contact with the second heating wire (34) is arranged on one side, close to the connecting block (3), of the cover plate (43).

2. The improved structure of the pipe casting gate half hot runner according to claim 1, wherein the mold body (1) is provided with a fixing groove (11) for accommodating the connecting line, an opening of the fixing groove (11) is fixedly connected with a blocking piece (12) for fixing the connecting line through a bolt, and the blocking piece (12) is provided with a plurality of pieces at intervals along the length direction of the fixing groove (11).

3. The improved structure of pipe fitting gating half hot runner according to claim 1, wherein the first heating wire (21) is externally connected with a temperature control box.

4. The improved structure of the pipe-gating half hot runner according to claim 1, wherein the connecting port (42) is provided with a conical shape, the top end of the sprue bush (2) is in threaded connection with the discharge port (33) of the connecting block (3), and the top end of the sprue bush (2) is provided with a clamping joint (45) for elastically matching with the connecting port (42).