CN211492717U

CN211492717U - Insert pin for injection mold

Info

Publication number: CN211492717U
Application number: CN201820506251.0U
Authority: CN
Inventors: 高禄武; 陈春来
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2018-04-11
Filing date: 2018-04-11
Publication date: 2020-09-15
Anticipated expiration: 2028-04-11

Abstract

The utility model relates to an injection mold field, concretely relates to inlay needle for injection mold. The utility model provides a inlay needle for injection mold, is including inlaying needle body and cooling tube, it is provided with along inlaying the first cavity that needle body axial extends to inlay needle body inside, in the first cavity is stretched into on the top of cooling tube, the clearance sets up between cooling tube and the first cavity, the top face of cooling tube with the interior top surface contact of first cavity, the top of cooling tube is provided with the cell body that communicates the inside and first cavity of cooling tube, cooling tube and inlet channel intercommunication, first cavity and outlet channel intercommunication. The problem of the structure of inlaying the needle among the prior art not combine well with the cooling water route, the cooling range is little is solved.

Description

Insert pin for injection mold

Technical Field

The utility model relates to an injection mold field, concretely relates to inlay needle for injection mold.

Background

The product quality and the qualification rate of each forming cavity in the automobile lamp are problems, the mold is one of factors which greatly influence the product quality and the qualification rate, and the mold influences more than 50 percent in the problem of the product quality and the qualification rate. The uniform mold temperature can realize the uniform cooling of the product, reduce the defects of the product to the maximum extent and shorten the molding period at the same time. The insert pin is a structure with high use frequency in the design of a die. The use of the insert pin enables the structure of the die to be richer and the die to be more advanced.

The water-free design in the insert pin easily causes uneven cooling of products, firstly can cause deformation of the products, and secondly can cause defects of shrinkage marks, stress marks and the like of the products. These defects seriously affect the appearance quality, the size and the molding cycle of the product. Application No. CN201520318848.9 discloses a powder alloy injection molding cooling insert, and specifically discloses: be provided with the cooling water course in this mould body, this powder alloy cooling of moulding plastics inlays needle and this cooling water course and converges mutually, when concrete work, the cooling water is at this cooling water course mesocycle flow and is tentatively cooled down to this mould body, meanwhile, because this powder alloy cooling of moulding plastics inlays the needle and this cooling water course converges mutually, and this powder alloy cooling of moulding plastics inlays the needle and inlays and establish in this mould body, so can mould plastics through this powder alloy cooling and inlay and carry out degree of depth cooling to this mould body to promote the cooling effect. Although the insert pin having the cooling function is disclosed in the above application, the cooling water passage of the insert pin in the above application is provided in the mold, and the cooling area is small, and only in the middle of the insert pin, in this case, the insert pin can realize the cooling function only by being fitted to a specific mold, and the cooling portions are concentrated, and have a certain influence on the cooling effect.

SUMMERY OF THE UTILITY MODEL

The structure of inlaying the needle that exists does not combine well with the cooling water route in order to solve among the prior art, the little problem of cooling range, the utility model provides an inlay the needle for injection mold has solved above-mentioned technical problem. The technical scheme of the utility model as follows:

the utility model provides a inlay needle for injection mold, is including inlaying needle body and cooling tube, it is provided with along inlaying the first cavity that needle body axial extends to inlay needle body inside, in the first cavity is stretched into on the top of cooling tube, the clearance sets up between cooling tube and the first cavity, the top face of cooling tube with the interior top surface contact of first cavity, the top of cooling tube is provided with the cell body that communicates the inside and first cavity of cooling tube, cooling tube and inlet channel intercommunication, first cavity and outlet channel intercommunication. Through setting up the cooling tube in inlaying needle body internal clearance, cooling liquid can flow to first cavity along the inside of cooling tube, realizes the cooling to inlaying the needle, and whole cooling system sets up inside inlaying the needle, is favorable to inlaying the needle and is applicable to different injection mold, and the interior top surface contact of cooling tube and first cavity, so, cooling liquid can flow to the top of inlaying the needle, and its cooling range is great, can realize the fine cooling to inlaying the needle.

Further, the distance between the inner top surface of the first cavity and the top surface of the insert pin body is 15-20 mm.

Further, the cooling pipe is a copper pipe.

Further, the diameter of the first cavity is not less than 6mm, the thickness of the side wall of the insert pin body corresponding to the first cavity is not less than 2mm, the thickness of the cooling pipe is not less than 1mm, and the gap distance between the outer wall of the cooling pipe and the inner wall of the first cavity is not less than 1 mm.

Further, still include the switching piece, the switching piece is inside to be provided with the second cavity with first cavity intercommunication, switching piece and this body coupling of inlaying the needle, the lower extreme clearance of cooling tube sets up in the second cavity.

Further, the lower extreme of inlaying the needle body is provided with hangs the platform, it is provided with the internal thread to hang the bench, the upper end of switching piece extends there is the link, on the link with hang a screw-thread fit.

Furthermore, a first opening and a second opening are formed in the switching block, the first opening is communicated with the interior of the cooling pipe and the water inlet pipeline, and the second opening is communicated with the second cavity and the water outlet pipeline.

Furthermore, the first opening is formed in the lower end of the adapter block, the lower end of the cooling pipe extends into and abuts against the water outlet end of the first opening, the water inlet end of the first opening is in threaded connection with the water inlet pipeline, the second opening is formed in the side wall of the adapter block, and the second opening is in threaded connection with the water outlet pipeline.

Furthermore, the water inlet pipeline and the water outlet pipeline are both hollow hexagonal rods, a connecting end extends from one end of the water inlet pipeline and the end of the water outlet pipeline connected with the switching block, and external threads are arranged on the connecting end.

The injection mold further comprises an insert pin pressing plate, the insert pin pressing plate is sleeved on the connecting end of the transfer block and tightly presses the insert pin body, and the insert pin pressing plate is fixedly connected with a movable mold core in the injection mold.

Based on the technical scheme, the utility model discloses the technological effect that can realize does:

1. the utility model discloses an inlay needle for injection mold, its inside is from taking cooling channel, through letting in cooling liquid, can cool off the inlay needle when moulding plastics, also can guarantee the even cooling of product, avoids product defects such as product deformation, sink mark, stress mark because of cooling inequality, shortens product molding cycle;

2. the cooling pipe for the insert pin of the injection mold is contacted with the inner top surface of the first cavity, and the top of the cooling pipe is provided with a groove body which is communicated with the inside of the cooling pipe and the first cavity, so that the cooling liquid can be ensured to move to the top end of the cooling pipe, the cooling range is large, and the insert pin is fully cooled;

3. the cooling structure for the insert pin of the injection mold is arranged in the insert pin, so that the problem of leakage of cooling liquid can be avoided, and the safety is high; in addition, the installation and the disassembly are convenient;

4. the distance between the inner top surface of the first cavity of the insert pin body of the insert pin for the injection mold and the top surface of the insert pin body is 15-20mm, the safety distance is reserved while the product is ensured to be cooled, and the insert pin is prevented from being damaged when the first cavity is processed;

5. the utility model discloses an each thickness and the diameter of inlaying the needle for injection mold all carry out certain injecing, can cool off liquid effectively and inlay the inside flow of needle, and the life of extension inlaying the needle.

Drawings

Fig. 1 is a schematic structural view of an insert pin according to the present invention;

FIG. 2 is a view showing a state of use of the insert pin of the present invention;

in the figure: 1-a pin body; 11-hanging a table; 2-a cooling pipe; 21-a groove body; 3-inserting a pin pressing plate; 4-a transfer block; 41-a connection end; 42-a first opening; 43-second opening; 5-a water inlet pipeline; 6-water outlet pipeline; 7-products; 8-moving die core; 9-fixing the mold core.

Detailed Description

The contents of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-2, the present embodiment provides an insert pin for an injection mold, which includes an insert pin body 1 and a cooling tube 2, wherein a first cavity extending along an axial direction of the insert pin body 1 is disposed inside the insert pin body 1, and a top end of the cooling tube 2 extends into the first cavity for cooling the insert pin body 1 and an injection molding product. The cooling pipe 2 and the first cavity are arranged in a clearance mode, the top end face of the cooling pipe 2 is in contact with the inner top face of the first cavity, a groove body 21 communicated with the interior of the cooling pipe 2 and the first cavity is arranged at the top end of the cooling pipe 2, the cooling pipe 2 is communicated with the water inlet pipeline 5, and the first cavity is communicated with the water outlet pipeline 6.

The head of the insert pin body 1 participates in injection molding of the product 7, a first cavity extending along the axial direction of the insert pin body 1 is arranged inside the insert pin body 1, an opening of the first cavity faces downwards, preferably, the inner diameter of the first cavity is not smaller than 6mm, the thickness of the side wall of the insert pin body 1 corresponding to the first cavity is not smaller than 2mm, and the distance between the inner top surface of the first cavity and the top surface of the insert pin body 1 is 15-20 mm.

The lower end of the insert body 1 is provided with a hanging platform 11, and preferably, the hanging platform 11 and the insert body 1 are integrally formed. On the one hand, the hanging table 11 serves to position the insert body 1. Specifically, the insert pin body 1 can be positioned by setting the shape of the hanging table 11, preventing the insert pin body 1 from rotating in the mold. Preferably, the hanging table 11 is shaped like a cylinder with a tangential surface on the side, and the outer diameter of the cylinder is larger than that of the insert body 1. On the other hand, the hanging table 11 plays a role of being connected with the switching block 4, a through hole communicated with the first cavity is formed in the hanging table 11, and internal threads are arranged on the inner wall of the opening of the through hole and used for being in threaded connection with the switching block 4. Preferably, the mouth of the abutment 11 taps 1/4' PT teeth, and more preferably, the distance from the PT teeth to the top surface of the abutment 11 of the insert body 1 is not less than 5 mm.

The switching block 4 is in threaded connection with the hanging table 11, a connecting end 41 extends from the upper end of the switching block 4, and external threads matched with the internal threads on the hanging table 11 are arranged on the connecting end 41. The switching block 4 is provided with a second cavity with an upward opening. After the adapting block 4 is in threaded connection with the hanging table 11, the first cavity is communicated with the second cavity, and the first cavity and the second cavity are located on the same central line. The adapter block 4 is further provided with a first opening 42 and a second opening 43, the first opening 42 is used for communicating the inside of the cooling pipe 2 with the water inlet pipe 5, the water inlet end of the first opening 42 is connected with the water inlet pipe 5, preferably, the first opening 42 is arranged at the bottom of the adapter block 4, the water inlet end of the first opening 42 is provided with an internal thread, and the water inlet end of the first opening 42 is in threaded connection with the water inlet pipe 5. The lower end of the cooling pipe 2 extends into the water outlet end of the first opening 42, and the cooling pipe 2 is communicated with the first opening 42. Preferably, the inner diameter of the water outlet end of the first opening 42 is larger than that of the middle flow section, so that the bottom end of the cooling pipe 2 is tightly matched with the water outlet end of the first opening 42 after extending into the first opening 42, the bottom end of the cooling pipe 2 can also abut against the boundary between the water outlet end of the first opening 42 and the middle flow section, and the cooling pipe 2 is limited by the insert pin body 1 and the adapter block 4. The second opening 43 is used for communicating the second cavity with the outlet pipe 6, preferably, the second opening 43 is a through hole arranged on the side wall of the adapter block 4, the second opening 43 is provided with an internal thread, and the second opening 43 is in threaded connection with the outlet pipe 6. The water inlet pipe 5 and the water outlet pipe 6 are used for water inlet and outlet, preferably, the water inlet pipe 5 and the water outlet pipe 6 are hollow hexagonal rods, a connecting end extends from one end of the water inlet pipe 5 and the end of the water outlet pipe 6 connected with the switching block 4, and external threads are arranged on the connecting end.

The cooling pipe 2 is located in a cavity formed by the first cavity and the second cavity, specifically, the upper portion of the cooling pipe 2 is located in the first cavity, and a gap is formed between the cooling pipe 2 and the first cavity, that is, a gap exists between the outer diameter of the cooling pipe 2 and the inner wall of the first cavity, and preferably, the distance of the gap between the outer diameter of the cooling pipe 2 and the inner wall of the first cavity is not less than 1 mm. The lower part of the cooling pipe 2 is located in the second cavity and is arranged with a gap between the cooling pipe and the second cavity, that is, a gap exists between the outer diameter of the cooling pipe 2 and the inner wall of the first cavity, and preferably, the distance of the gap between the outer diameter of the cooling pipe 2 and the inner wall of the first cavity is not less than 1 mm. The top end surface of the cooling pipe 2 is tightly contacted with the inner top surface of the first cavity, and the bottom end of the cooling pipe 2 is inserted into the water outlet end of the first opening 42. The top end of the cooling pipe 2 is provided with two groove bodies 21 communicating the inside of the cooling pipe 2 and the first cavity, and preferably, the number of the groove bodies is two, and the groove bodies are U-shaped grooves. The lower end of the cooling tube 2 is inserted into the water outlet end of the first opening 42 of the adapter block 4. Preferably, the cooling pipe 2 is a copper pipe, and the thickness of the cooling pipe 2 is not less than 1 mm.

The utility model discloses an inlay needle still including inlaying needle clamp plate 3, inlay 8 fixed connection of movable mould benevolence in needle clamp plate 3 and the injection mold, preferably, inlay needle clamp plate 3 and movable mould benevolence and pass through screw fixed connection. The insert pin pressing plate 3 is used for pressing the insert pin body 1, the insert pin pressing plate 3 is tightly sleeved on the outer side of the connecting end 41 of the switching block 4 and is kept away from the periphery, the upper surface of the insert pin pressing plate 3 tightly presses the hanging table 11, the lower end of the insert pin pressing plate 3 extends to form a circle of extension, and the extension and the switching block 4 are in clearance fit. Preferably, the insert presser plate 3 is square in shape.

Based on the insert pin structure, when in use, the insert pin body 1 extends into a movable mould core 8 in an injection mould, the product 7 is injection molded under the combined action of the movable mold core 8 and the fixed mold core 9, the head of the insert pin body 1 participates in the injection molding of the product 7, the hanging table 11 plays a role in stopping rotation to prevent the insert pin body 1 from rotating in the movable mold core, the insert pin pressing plate 3 presses the insert pin body 1 to prevent the insert pin body 1 from shaking up and down, the insert pin pressing plate 3 is fixedly connected with the movable mold core through a screw, cooling liquid enters the cooling pipe 2 through the water inlet pipeline 5 and flows to the top of the cooling pipe 2, flows to the first cavity through the U-shaped groove at the top of the cooling pipe 2, the liquid in the first cavity flows to the second cavity, then reaches the water outlet pipe 6 through the second opening 43, and finally flows out through the water outlet pipe 6 to form the circulating flow of the cooling liquid, so as to realize the cooling circulation.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. The insert pin for the injection mold is characterized by comprising an insert pin body (1) and a cooling pipe (2), wherein a first cavity extending along the axial direction of the insert pin body (1) is arranged inside the insert pin body (1), the top end of the cooling pipe (2) extends into the first cavity, a gap is formed between the cooling pipe (2) and the first cavity, the top end surface of the cooling pipe (2) is in contact with the inner top surface of the first cavity, a groove body (21) communicating the inside of the cooling pipe (2) with the first cavity is arranged at the top end of the cooling pipe (2), the cooling pipe (2) is communicated with a water inlet pipeline (5), and the first cavity is communicated with a water outlet pipeline (6);

the insert pin structure is characterized by further comprising a transfer block (4), a second cavity communicated with the first cavity is arranged inside the transfer block (4), the transfer block (4) is connected with the insert pin body (1), and a gap at the lower end of the cooling pipe (2) is arranged in the second cavity;

the lower end of the insert needle body (1) is provided with a hanging table (11), internal threads are arranged on the hanging table (11), a connecting end (41) extends from the upper end of the transfer block (4), and the connecting end (41) is in threaded fit with the hanging table (11);

the injection molding machine is characterized by further comprising an insert pin pressing plate (3), wherein the insert pin pressing plate (3) is sleeved on the connecting end (41) of the transfer block (4) and tightly presses the insert pin body (1), and the insert pin pressing plate (3) is fixedly connected with a movable mold core (7) in the injection mold;

the distance between the inner top surface of the first cavity and the top surface of the insert pin body (1) is 15-20 mm.

2. An insert pin for an injection mould according to claim 1, characterised in that the cooling tube (2) is a copper tube.

3. A insert pin for an injection mold according to any one of claims 1-2, wherein the diameter of the first cavity is not less than 6mm, the thickness of the side wall of the insert pin body (1) corresponding to the first cavity is not less than 2mm, the thickness of the cooling tube (2) is not less than 1mm, and the clearance distance between the outer wall of the cooling tube (2) and the inner wall of the first cavity is not less than 1 mm.

4. Insert pin for an injection mould according to any of the claims 1-2, wherein the adapter block (4) is provided with a first opening (42) and a second opening (43), the first opening (42) communicating the interior of the cooling tube (2) with the inlet conduit (5) and the second opening (43) communicating the second cavity with the outlet conduit (6).

5. Insert pin for an injection mould according to claim 4, wherein the first opening (42) is provided at the lower end of the adapter block (4), the lower end of the cooling tube (2) extends into and abuts against the water outlet end of the first opening (42), the water inlet end of the first opening (42) is in threaded connection with the water inlet conduit (5), the second opening (43) is provided in the side wall of the adapter block (4), and the second opening (43) is in threaded connection with the water outlet conduit (6).

6. The insert pin for an injection mold according to any one of claims 1-2 and 5, wherein the water inlet pipe (5) and the water outlet pipe (6) are both hollow hexagonal rods, and a connecting end extends from one end of the water inlet pipe (5) and the end of the water outlet pipe (6) connected with the adapter block (4), and the connecting end is provided with an external thread.