CN209832489U

CN209832489U - Injection mold for optical cable junction box

Info

Publication number: CN209832489U
Application number: CN201920110905.2U
Authority: CN
Inventors: 曾子才
Original assignee: Guangzhou Hongxi Communication Technology Co Ltd
Current assignee: Guangzhou Hongxi Communication Technology Co Ltd
Priority date: 2019-01-23
Filing date: 2019-01-23
Publication date: 2019-12-24
Anticipated expiration: 2029-01-23

Abstract

The utility model provides an optical cable terminal box injection mold, includes movable mould part and cover half part, its characterized in that: the movable mould part includes movable mould frame (18), ejector pin fixed plate (14), push pedal (17), die leg (11), draws material pole (13) and movable mould bedplate (10), the cover half part includes cover half frame (1), runner cover (6) and cover half bedplate (3), be equipped with movable mould benevolence (7) in movable mould frame (18), be equipped with oilhole (15) on movable mould frame (18), be equipped with the point cold needle in movable mould benevolence (7), be equipped with cover half benevolence (2) in cover half frame (1), be equipped with vacuum valve piece (19) on cover half frame (1), cover half frame (1) is equipped with ejector pin (5) and belleville spring (4) in advance. Compared with the prior art, the utility model has the advantages that: the utility model discloses in actual production, can improve production efficiency, reduce the emergence of the defect of moulding plastics such as product shrinkage cavity, strain, sticking die, gas pocket, practice thrift the cost.

Description

Injection mold for optical cable junction box

Technical Field

The utility model relates to an injection mold field specifically indicates an optical cable terminal box injection mold.

Background

The injection mold is an important technical device for producing various industrial products, along with the rapid development of the plastic industry and the popularization and application of plastic products in the industrial departments of aviation, aerospace, electronics, machinery, ships, automobiles and the like, the requirements of the products on the mold are higher and higher, the traditional mold needs to be manually preheated before production and use, even shell products such as a junction box or a plurality of shell products with thin wall thickness can be stuck on a fixed mold during mold opening, and the injection defects of air holes, pulling damage, shrinkage cavities and the like can occur to the products due to poor treatment of exhaust and cooling of the mold during production, so that the products are scrapped, and the production cost is increased.

SUMMERY OF THE UTILITY MODEL

To the problem that above-mentioned current injection mold meets in production, the utility model provides a can carry out preheating to the mould, reduce the optical cable terminal box injection mold of product defect of moulding plastics.

In order to solve the technical problem, the utility model provides a technical scheme does:

an injection mold for an optical cable junction box comprises a movable mold part and a fixed mold part, wherein the movable mold part comprises a movable mold frame, an ejector rod fixing plate, a push plate, mold legs, a material pulling rod and a movable mold base plate, the fixed die part comprises a fixed die frame, a sprue bush, a fixed die base plate, a pre-ejection mechanism and a local pressurizing mechanism, a movable mold core is arranged in the movable mold frame, an oil hole is arranged on the movable mold frame, the oil hole is externally connected with an oil temperature machine through an oil pipe, the movable mold frame is provided with a vacuum valve block which is externally connected with a vacuum machine through an air pipe, the movable mold core is internally provided with a spot cooling needle which is provided with a water inlet and a water return port, and is externally connected with a spot cooling machine through a water pipe, a fixed die core is arranged in the fixed die frame, the fixed die frame is provided with a pre-ejector rod and a disc spring, and the disc spring is sleeved on the pre-ejector rod, the fixed die frame is provided with an oil cylinder, and the end part of a piston rod of the oil cylinder is provided with a pressurizing rod.

As an improvement, the movable die frame is provided with a guide pillar, the fixed die frame is provided with a guide sleeve, and the matching position of the movable die and the fixed die can be more accurate through the matching of the guide pillar and the guide sleeve during die assembly.

As an improvement, an ejector rod and a reset rod are arranged in the ejector rod fixing plate, the ejector rod can eject a product after the mold is opened, and the reset rod is extruded by the fixed mold to drive the push plate and the ejector rod to reset through mold closing.

As an improvement, a cooling water pipeline is arranged in the sprue bush, water can be injected in the production process to reduce the temperature of the sprue bush, and the service life of the sprue bush is prolonged.

As an improvement, an exhaust passage is arranged above the parting surface of the fixed mold frame, and due to the fact that gas exists in the cavity or the molten material, the gas is exhausted through the exhaust passage in the injection molding process, and the injection molding defects of products are reduced.

As an improvement, the pressurizing rod is matched with the fixed die frame in a clearance fit mode, and the phenomenon that the pressurizing rod cannot be used normally due to the fact that an oil cylinder is blocked in work is avoided.

Compared with the prior art, the utility model has the advantages that: the utility model discloses in the use, effect through vacuum machine and vacuum valve piece, take out the gas in the die cavity behind the compound die all, guarantee the inside pore-free of product, oil in the oil temperature machine passes through the oilhole in the oil pipe flow movable mould frame, can preheat the mould automatically when using, the setting of some cold needles can make the core needle temperature reduction in the mould benevolence, the life-span of extension core needle and prevent that the product from pulling when the demolding, local loading system also can be full of the melt in can making the great die cavity of the degree of depth at work, prevent the emergence of shrinkage cavity, the cooperation of ejection mechanism in advance on the cover half draws the material pole can separate product and cover half better when the die sinking, prevent the sticking phenomenon.

Drawings

Fig. 1 is the utility model relates to an optical cable terminal box injection mold's overall structure schematic diagram.

Fig. 2 is the utility model relates to an optical cable terminal box injection mold's ejection mechanism schematic structure in advance.

Fig. 3 is the utility model relates to an optical cable terminal box injection mold's local pressurization mechanism schematic structure.

Fig. 4 is the utility model discloses an optical cable terminal box injection mold's point cold needle and core needle cooperation structural schematic.

As shown in the figure: 1. the device comprises a fixed die frame, 2, a fixed die core, 3, a fixed die base plate, 4, a disc spring, 5, a pre-ejector rod, 6, a sprue bush, 7, a movable die core, 8, a guide sleeve, 9, a guide pillar, 10, a movable die base plate, 11, a die pin, 12, an ejector rod, 13, a material pulling rod, 14, an ejector rod fixing plate, 15, an oil hole, 16, a reset rod, 17, a push plate, 18, a movable die frame, 19, a vacuum valve block, 20, an oil cylinder, 21 and a pressurizing rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic view of an overall structure of an injection mold for an optical cable junction box of the present invention, which includes a movable mold part and a fixed mold part, the movable mold part includes a movable mold frame 18, an ejector fixing plate 14, a push plate 17, mold feet 11, a material pulling rod 13 and a movable mold base plate 10, the ejector fixing plate 14 and the push plate 17 are connected by bolts, the material pulling rod 13, the ejector 12 and a reset rod 16 are installed in corresponding holes on the movable mold frame 18, the mold feet 11, the movable mold base plate 10 and the movable mold frame 18 are connected by bolts, the fixed mold part includes a fixed mold frame 1, a sprue bush 6, a fixed mold base plate 3, a pre-ejection mechanism and a local pressurization mechanism, a movable mold core 7 is installed in the movable mold frame 18, an oil hole 15 is installed on the movable mold frame 18, the oil hole 15 is connected to an external oil temperature machine through an oil pipe, a vacuum valve block 19 is, the vacuum valve block 19 passes through the external vacuum machine of trachea, be equipped with some cold needles in the movable mould benevolence 7, be equipped with water inlet 22 and return water mouth 23 on the some cold needles, and the external cold machine of some of water pipe, be equipped with fixed mould benevolence 2 in the fixed mould frame 1, fixed mould frame 1 is equipped with ejector pin 12 in advance and belleville spring 4, and belleville spring 4 cover is on ejector pin 12 in advance, be equipped with hydro-cylinder 20 on the fixed mould frame 1, the piston rod tip of hydro-cylinder 20 is equipped with pressure bar 21.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a pre-ejection mechanism, and the pre-ejection mechanism includes a pre-ejector rod 5 and a belleville spring 4, which are both disposed in a groove of a fixed mold frame 1 and then connected to the fixed mold frame 1 by a stopper through a bolt.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a local pressurization mechanism, the local pressurization mechanism includes an oil cylinder 20 and a pressurization rod 21, the oil cylinder 20 is fixed on the fixed mold frame 1 through a bracket of the oil cylinder 20, and the pressurization rod 21 is connected with the end of a piston of the oil cylinder 20 through a thread.

And as shown in fig. 4, fig. 4 is a schematic diagram of a structure of the point cooling needle and the core needle, the point cooling needle is of a tubular structure, one end of the point cooling needle is provided with a threaded pipe, the threaded pipe is provided with a water inlet hole and a water outlet hole, and the other end of the point cooling needle is 3-5 mm away from the end part of the core needle.

Before the utility model is used again, the oil temperature machine is opened, the oil heated in the oil temperature machine is conveyed to the oil circuit in the movable mould frame 18, preheating the mould, otherwise, sticking the mould if directly performing injection moulding, starting injection moulding after preheating, firstly spraying a release agent on the movable mould core 7 and the fixed mould core 2, then closing the mould, before the molten material enters the sprue bush 6 and the cavity is not filled, the vacuum machine is started, all gas in the cavity is pumped out through the vacuum valve block 19, the cavity is ensured to be in a vacuum state, and after the vacuum pumping operation is finished, filling is carried out, in the process of filling the mold cavity with the molten material, a valve of a water pipe connected with a point cooling needle in the mold core needle is opened, under the action of the high pressure of the spot cooler, water enters the spot cooling needle from the water inlet 22 and cools the core pin, then the injection molded part returns to the point cooling machine from the water outlet 23, and the process is continued until the injection molded part is demoulded; when the injection molding piece is not completely cooled and solidified, the oil cylinder 20 on the movable mold starts to advance, the piston rod drives the pressurizing rod 21, pressurizing the position of the injection molding part where shrinkage cavity is easy to occur, after the injection molding part is completely solidified, the oil cylinder 20 retreats, the injection molding part is basically molded, the next step is to open the mold and take the part, when the mold is opened, the pre-ejection mechanism and the movable mold are synchronously carried out, because the pre-ejection rod 5 is arranged in the disc spring 4, and one end of the pre-ejection rod extends out of the cavity of the fixed die, when the cavity is filled, the pre-ejector rod 5 compresses the disc spring 4 because the filling pressure is greater than the elastic force of the disc spring 4, the disc spring 4 always has the elastic force, when the movable mould is opened, the pre-ejector rod 5 can act on the injection molding piece under the action of the elastic force to separate the injection molding piece from the cavity of the fixed mould, and the plastic part moves along with the moving die under the action of the material pulling rod 13 until the ejector rod 12 is ejected.

The present invention and the embodiments thereof have been described above, but the present invention is not limited to the above description, and only one of the embodiments of the present invention is shown in the drawings, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they can devise similar structural modes and embodiments without departing from the spirit of the present invention, and all such structural modes and embodiments are within the scope of the present invention.

Claims

1. The utility model provides an optical cable terminal box injection mold, includes movable mould part and cover half part, its characterized in that: the movable mould part comprises a movable mould frame (18), an ejector rod fixing plate (14), a push plate (17), mould feet (11), a material pulling rod (13) and a movable mould seat plate (10), the fixed mould part comprises a fixed mould frame (1), a sprue bush (6) and a fixed mould seat plate (3), a movable mould core (7) is arranged in the movable mould frame (18), an oil hole (15) is formed in the movable mould frame (18), the oil hole (15) is externally connected with an oil temperature machine through an oil pipe, a spot cooling needle is arranged in the movable mould core (7), a water inlet (22) and a water return port (23) are arranged on the spot cooling needle, a spot cooling machine is externally connected through a water pipe, a fixed mould core (2) is arranged in the fixed mould frame (1), a vacuum valve block (19) is arranged on the fixed mould frame (1), the vacuum valve block (19) is externally connected with a vacuum machine through an air pipe, the fixed mould frame (1) is provided with a pre-, and the disc spring (4) is sleeved on the pre-ejector rod (5), the fixed die frame (1) is provided with an oil cylinder (20), and the end part of a piston rod of the oil cylinder (20) is provided with a pressure rod (21).

2. The injection mold for an optical cable junction box according to claim 1, wherein: the movable mould frame (18) is provided with a guide post (9), and the fixed mould frame is provided with a guide sleeve (8).

3. The injection mold for an optical cable junction box according to claim 1, wherein: the ejector rod fixing plate (14) is internally provided with an ejector rod (12) and a reset rod (16).

4. The injection mold for an optical cable junction box according to claim 1, wherein: and a cooling water pipeline is arranged in the sprue bush (6).

5. The injection mold for an optical cable junction box according to claim 1, wherein: and an exhaust passage is arranged above the parting surface of the fixed mold frame (1).

6. The injection mold for an optical cable junction box according to claim 1, wherein: the pressurizing rod (21) is in clearance fit with the fixed die frame (1).