CN204451017U - A kind of nozzle arrangements of rubber injection moulding machine - Google Patents

Abstract

A nozzle structure for a rubber injection molding machine, characterized in that: the nozzle body is sequentially composed of a mouth, a neck and a connecting part, a positioning shoulder is provided between the mouth and the neck, and an external thread is provided on the connecting part, Along the outer wall of the neck of the nozzle main body, there is a cooling jacket that can accommodate liquid circulation. The cooling jacket is composed of an inner jacket and an outer jacket with a welded structure. The cooling jacket is provided with an inlet for communicating with the cooling pipeline. and an outlet, and a partition for controlling the flow direction is provided between the inlet and the outlet. The utility model has a simple and convenient structure, and its cooling performance fully meets the injection characteristics, and the metered rubber can be completely injected into the cavity, thereby reducing the product reject rate and meeting the manufacturing requirements of high-precision products.

Description

Nozzle structure of a rubber injection molding machine

technical field

The utility model relates to the technical field of injection molding machinery, in particular to an improvement of the nozzle structure of a rubber injection molding machine.

Background technique

The injection characteristics of the rubber injection molding machine determine that the final injection, the higher the injection pressure, the higher the shear heat generated. Therefore, the nozzle at this time needs to be cooled quickly to control the temperature of the rubber material and prevent premature vulcanization of the rubber material, so that the metered rubber material can be completely injected into the cavity, reducing the product rejection rate and meeting the manufacturing requirements of high-precision products. However, it is difficult to control the temperature of the nozzle of the rubber injection molding machine in the prior art, because the nozzle hole is small, and the shearing heat is serious during injection, resulting in a temperature difference between the front and rear of the rubber during injection, and a large temperature difference between the inside and outside, and the rejection rate is high, which cannot meet the high precision. product requirements.

Contents of the invention

The main purpose of this utility model is: to overcome the problem that the shear heating temperature of the nozzle affects the product quality when the rubber injection molding machine is injecting, so as to improve the nozzle of the injection molding machine and develop a nozzle with a cooling jacket.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: a nozzle structure of a rubber injection molding machine, which has a nozzle body and a nozzle body communicating with the nozzle body, and is characterized in that: the nozzle body is composed of a nozzle The mouth, the neck and the connecting part are composed in sequence, a positioning shoulder is set between the mouth and the neck, and an external thread is provided on the connecting part, and the external thread is adapted to the internal thread provided on the nozzle body; along the nozzle body The outer wall is provided with a cooling jacket that can accommodate liquid circulation. The cooling jacket is provided with an inlet and an outlet for communicating with the cooling pipeline. Between the inlet and the outlet is a control flow partition.

The technical scheme of the utility model can also be further improved:

Preferably, the cooling jacket is arranged on the neck of the nozzle body; the lower end of the cooling jacket is in contact with the positioning shoulder, and the upper end is close to the end of the external thread of the connecting part.

Preferably, the cooling jacket is composed of an inner jacket and an outer jacket with a welded structure, and the inner jacket is closely matched with the outer wall of the neck of the nozzle body.

As a preference, the cooling pipeline connected with the inlet and outlet is arranged axially along the nozzle body, but not in contact with the hot plate and the nozzle body, and the inlet and outlet are installed on both sides of the partition .

The beneficial effects of the utility model are:

1) The structure of the device is simple and convenient. Since the nozzle and the nozzle body will be inserted into the positioning hole of the hot plate, it must be simple and convenient. The utility model cooperates with an external cooling system, and its cooling performance is reliable; when the nozzle body needs to be replaced, the thread can be unscrewed, the nozzle is separated from the nozzle body, and the whole set of nozzles (including the nozzle body and the cooling jacket connected to the nozzle body) can be replaced; The cooling jacket can also be removed from the nozzle body, and only the nozzle body can be replaced, which is very convenient.

2) It is determined by the injection characteristics that the higher the injection pressure is, the higher the shear heat will be. At this time, the nozzle needs to be cooled rapidly to control the temperature of the rubber material and prevent premature vulcanization of the rubber material. The utility model fully satisfies the above-mentioned injection characteristics, and can completely inject the metered rubber material into the cavity, thereby reducing the reject rate of products and meeting the manufacturing requirements of high-precision products.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is a structural view of the main body of the nozzle.

In the figure: 1. Nozzle body, 2. Cooling inner jacket, 3. Cooling jacket, 4. Partition plate, 5. Inlet, 6. Outlet, 7. Cooling pipeline, 11. Connecting part, 12. Neck Department, 13 mouth, 14 positioning shoulder;

a. Hot plate, b. Nozzle body, c. Rubber compound.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in the nozzle structure of the rubber injection molding machine, the nozzle body 1 is screwed with the nozzle body b. The nozzle body is divided into a mouth 13, a neck 12 and a connecting portion 11. The outer ring of the neck 12 has a cooling inner sleeve 2 (the lower end abuts against the positioning shoulder 14) the cooling inner sleeve 2 is in close contact with the outer wall of the neck, the cooling inner sleeve 2 is covered with a cooling jacket 3, and there is a suitable liquid between the cooling inner jacket and the cooling jacket flow cavity, and the two ends of the inner sleeve and the outer sleeve are welded around; on the cooling outer sleeve 3, an inlet port 5 and an outlet port 6 are arranged side by side, and a partition 4 is fixed in the cavity between the two ports to guide In the flow direction, the inlet port 5 and the outlet port 6 are connected to the cooling pipeline 7 arranged axially along the nozzle body b, but are not in contact with the hot plate and the nozzle body.

When in use, when the injection pressure increases, the rubber material is injected downward, and more and more shear heat is generated when the rubber material passes through the nozzle. At this time, the cooling pipeline 7 enters the water inlet 5 and enters the cooling inner sleeve 2 With the inner ring of the cooling jacket 3, because there is a partition 4 in the middle, the cooling water is circulated and the water is discharged from the outlet 6 to take away the heat of the nozzle and reduce the temperature of the nozzle to control the temperature of the rubber material and prevent premature vulcanization of the rubber material. The rubber material is completely injected into the cavity, reducing the product rejection rate and meeting the manufacturing requirements of high-precision products.

Example 2

The difference between this embodiment and this embodiment 1 is that the cooling jacket is directly socketed and fixed on the neck 12 of the nozzle main body 1 without an inner jacket, which has the advantages of high cooling efficiency and simple structure. But when the nozzle needs to be replaced, the cooling part also needs to be replaced. Others are the same as in Example 1.

Claims (4)

1. the nozzle arrangements of a rubber injection moulding machine, the nozzle body that there is nozzle body and be communicated with nozzle body, it is characterized in that: described nozzle body is made up of mouth, neck and connecting portion order, location shoulder is provided with between mouth and neck, connecting portion is provided with external screw thread, and the internal thread that described external screw thread and nozzle body are arranged is adaptive; Be provided with the coolant jacket that can hold liquid communication along nozzle body outer wall, described coolant jacket be provided with side by side influent stream mouth for being communicated with cooling line and go out head piece, described influent stream mouth and going out to be provided with between head piece for control flow check to dividing plate.

2. the nozzle arrangements of rubber injection moulding machine according to claim 1, is characterized in that: described coolant jacket is arranged at the neck of nozzle body; Its lower end is takeed on location and is abutted, and upper end is close to connecting portion male ends.

3. the nozzle arrangements of rubber injection moulding machine according to claim 1 and 2, is characterized in that: described coolant jacket adopts Welding Structure to combine by cooling inner sleeve and cooling jacket, and its cooling inner sleeve and nozzle body neck outer wall closely cooperate.

4. the nozzle arrangements of rubber injection moulding machine according to claim 1 and 2, is characterized in that: with influent stream mouth with go out cooling line that head piece is connected along nozzle body axially-aligned.