Mould sprue bush of injection mould of waste gas valve cover

Abstract

A mold sprue bush of an injection mold of a waste gas valve deck comprises a sprue bush body composed of a first cap part and a first pipeline part, a first flow guide opening is formed in the middle of the first cap part, and a first glue flowing channel communicated with the first flow guide opening is formed in the middle of the first pipeline part. The sprue bush is characterized in that a protective lining detachably connected with the sprue bush body is arranged on the sprue bush body, and the protective lining acts on the first cap part and extends into the first glue flowing channel at the same time; and through combination of the two, the injection molding raw materials can be prevented from being in contact with the inner surface of the first flow guide opening and the inner surface of the first glue flowing channel when being injected into the injection mold through the sprue bush body. The injection mold has the beneficial effects that injection molding raw materials are only left on the protective lining, so that only the protective lining needs to be replaced, and the flow of the injection molding raw materials injected during subsequent injection molding work is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding production of a waste gas valve cover, in particular to a mold gate sleeve of an injection molding mold of a waste gas valve cover. Background Art

[0002] The sprue bushing is a part that allows the molten plastic raw material to be injected into the mold from the nozzle of the injection molding machine. After the injection molding work is completed, there will be injection molding raw materials remaining in the guide port and the glue flow channel in the sprue bushing. The accumulation of injection molding raw materials will affect the flow rate of injection molding raw materials entering, that is, the amount entering the mold in the same time will be reduced. Therefore, the residue at the sprue will be removed before injection molding. The common method is to scrape it off. Although this method is simple, easy and low-cost, it may damage the mold. Utility Model Content

[0003] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides a mold gate sleeve of an injection mold for an exhaust valve cover to solve the above-mentioned problems.

[0004] The utility model adopts a technical solution to solve its technical problems: the mold gate sleeve of the injection mold of the exhaust valve cover includes a gate sleeve body composed of a first cap part and a first pipe part, a first guide port is arranged at the center position of the first cap part, and a first glue flow channel interconnected with the first guide port is arranged at the center position of the first pipe part, and the utility model is characterized in that: a protective lining detachably connected to the gate sleeve body is arranged, the protective lining acts on the first cap part and also extends into the first glue flow channel, and the combination of the two allows the injection molding raw material to be injected into the injection mold through the gate sleeve body so as to avoid contact between the injection molding raw material and the inner surface of the first guide port and the inner surface of the first glue flow channel.

[0005] To be further improved, the protective lining includes a second cap portion having a second flow guide port, and a second pipe portion having a second glue flow channel, the second cap portion is detachably connected to the first cap portion and covers the inner surface of the first flow guide port, and the second pipe portion is placed in the first pipe portion and covers the inner surface of the first glue flow channel.

[0006] For further improvement, the first cap portion is provided with an annular slot located outside the first guide port, and the second cap portion is provided with an annular insert extending downward and inserted into the annular slot, and the combination of the two allows the final assembly position of the protective liner on the sprue sleeve body to be quickly defined.

[0007] For further improvement, the annular slot is provided with locking rods symmetrically distributed on both sides of the first guide port, one end of the locking rod is fixed to the outer ring surface of the annular slot, and the other end is fixed to the inner ring surface of the annular slot, and the annular insert is provided with locking sockets symmetrically distributed on both sides of the second guide port and the position matches the locking rods, the combination of the locking sockets and the locking rods is used to prevent the separation of the gate sleeve body and the protective lining.

[0008] For further improvement, the locking socket is provided with a first guide channel and a second guide channel on the annular insert strip for guiding the locking rod to reach the locking socket along the locking direction, and the two second guide channels extend in different directions on both sides to match the rotation of the protective lining during the locking movement.

[0009] For further improvement, a turning channel is provided on the annular inserting strip for guiding the locking inserting rod to turn in the locking direction from the first guide channel to the second guide channel.

[0010] Further improvement, the turning channel is formed with a fitting wall which is completely fitted on the surface of the locking rod portion when the locking rod reaches the turning channel.

[0011] According to a further improvement, the locking rod is in a cylindrical configuration, the locking socket is in an arc configuration matching the configuration of the locking rod, and the inner diameter of the arc is smaller than the outer diameter of the arc of the locking rod.

[0012] The beneficial effects of the utility model are:

[0013] The utility model utilizes the protective lining to ensure that no injection molding material remains on the inner surface of the guide port of the gate sleeve and the inner surface of the first glue flow channel, and the injection molding material only remains on the protective lining. Therefore, it is only necessary to replace the protective lining, which will not affect the flow rate of the injection molding material injected during subsequent injection molding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the full cross-section structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 4 For this utility model Figure 3 A partial enlarged schematic diagram of part A;

[0018] Figure 5 This is a schematic diagram of the use state of the utility model applied in a mold. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Referring to the accompanying drawings: the mold gate sleeve of the injection mold of this exhaust valve cover includes a gate sleeve body 1 composed of a first cap portion 11 and a first pipe portion 12. A first guide port 11-a is arranged at the center position of the first cap portion 11, and a first glue flow channel 12-a which is interconnected with the first guide port 11-a is arranged at the center position of the first pipe portion 12. A protective lining 2 which is detachably connected to the gate sleeve body 1 is arranged. The protective lining 2 acts on the first cap portion 11 and also extends into the first glue flow channel 12-a. The combination of the two allows the injection molding material to be injected into the injection mold through the gate sleeve body 1 so as to avoid contact between the injection molding material and the inner surface of the first guide port 11-a and the inner surface of the first glue flow channel 12-a. The principle of the utility model is that a removable protective lining 2 is arranged in the gate sleeve body 1, and the function of the protective lining 2 is to prevent the injection molding material from contacting the inner surface of the first guide port 11-a and the inner surface of the first glue flow channel 12-a. In this way, after the injection molding work is completed, no injection molding material will remain on the inner surface of the first guide port 11-a and the inner surface of the first glue flow channel 12-a, and the injection molding material will only remain on the protective lining 2. Therefore, it is only necessary to replace the protective lining 2, which will not affect the flow rate of the injection molding material injected during the subsequent injection molding work.

[0021] The protective lining 2 includes a second cap portion 21 having a second guide port 21-a, and a second pipe portion 22 having a second glue flow channel 22-a. The second cap portion 21 is detachably connected to the first cap portion 11 and covers the inner surface of the first guide port 11-a. The second pipe portion 22 is placed in the first pipe portion 12 and covers the inner surface of the first glue flow channel 12-a. The protective lining 2 is configured in this way. On the one hand, it has the same structure as the gate sleeve body 1, so that the injection molding material can be quickly guided into the mold. On the other hand, it can cover the first guide port 11-a and the first glue flow channel 12-a of the gate sleeve body 1 to avoid contact between the injection molding material and the gate sleeve body 1.

[0022] The first cap portion 11 is provided with an annular slot 11-b located outside the first guide port 11-a, and the second cap portion 21 is provided with an annular insert 21-b extending downward and inserted into the annular slot 11-b, and the combination of the two allows the final assembly position of the protective lining 2 on the sprue sleeve body 1 to be quickly defined, that is, the use position of the protective lining 2 on the sprue sleeve body 1 can be quickly determined, and the plug-in matching method is relatively simple and easy to assemble.

[0023] The annular slot 11-b is provided with a locking rod 3 which is symmetrically distributed on both sides of the first guide port 11-a, one end of the locking rod 3 is fixed to the outer ring surface of the annular slot 11-b, and the other end is fixed to the inner ring surface of the annular slot 11-b, and the annular insert 21-b is provided with a locking socket 4 which is symmetrically distributed on both sides of the second guide port 21-a and whose position matches the locking rod 3. The combination of the locking socket 4 and the locking rod 3 is used to prevent the separation of the gate sleeve body 1 and the protective lining 2. Such a setting enables the gate sleeve body 1 and the protective lining 2 to always remain connected, that is, the connection strength between the two is enhanced, thereby effectively preventing the two from being separated. At the same time, the setting of the two limited positions can maintain balance, that is, the injection tube inserted by the injection machine into the second guide port 11-a will generate a joint force when the injection is completed and the glue will not be affected by the joint force and one side will not be lifted.

[0024] The locking socket 4 is provided with a first guide channel 5 and a second guide channel 6 on the annular insert 21-b for guiding the locking rod 3 to reach the locking socket 4 along the locking direction. The two second guide channels 6 extend in different directions on both sides respectively to match the rotation of the protective lining 2 during the locking movement. Through the first guide channel 7, the second guide channel 8, and the locking socket 4, a tool-free and parts-free operation mode of assembling the locking rod 3 can be realized, which is suitable for quick assembly and convenient assembly. At the same time, the first guide channel 7 and the second guide channel 8 also extend the total length of the route for the locking rod 3 to reach the locking socket 4, which can also increase the difficulty of the locking rod 3 escaping; the rotation is considered that the annular insert 21-b and the annular slot 11-b are both annular, which limits the movement form of the protective lining 2, and the only movement form that can be realized is rotation, and the first guide channel 5 (vertical) and the second guide channel 6 (lateral) are L-shaped. Then, after passing through the first guide channel 5, the locking rod 3 can enter the second guide channel 6 by rotating the protective lining 2.

[0025] The annular insert strip 21-b is provided with a turning channel 7 for guiding the locking rod 3 from the first guide channel 5 to the second guide channel 6 in the turning locking direction. The first guide channel 5 and the second guide channel 6 basically extend in a straight line, while the turning channel 9 basically extends in an arc. Therefore, when the locking rod 3 slides in the turning channel 7, the corresponding turning assembly direction is an arc-shaped direction, which can be clearly felt by the user and will play a corresponding prompting role, so that the user can predict that he is about to reach the turning channel 7, which also means that the locking rod 3 is about to enter the turning channel 7, which can avoid user misjudgment.

[0026] The turning channel 7 is formed with a fitting wall 71 which is completely fitted on a part of the surface of the locking rod 3 when the locking rod 3 reaches the turning channel 7, so that the locking rod 3 is accurately positioned in the turning channel 7 to match the accuracy of the locking rod 3 entering the second guide channel 6.

[0027] The locking rod 3 is cylindrical in configuration, and the locking socket 4 is an arc in configuration that matches the configuration of the locking rod 3, and its arc inner diameter is smaller than the arc outer diameter of the locking rod 3. Such a configuration enables the locking rod 3 to achieve a relatively tight interference fit when inserted into the locking socket 4, thereby increasing the installation stability of the protective lining 2 on the sprue sleeve body 1, and will not be pulled out together with the joint force generated by the injection tube inserted into the second guide port 11-a by the injection machine when the injection is completed and the glue is withdrawn.

[0028] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A mold sprue bushing of an injection mold for an exhaust valve cover, comprising a sprue bushing body (1) consisting of a first cap portion (11) and a first pipe portion (12), wherein a first flow guide port (11-a) is provided at a central position of the first cap portion (11), and a first glue flow channel (12-a) communicating with the first flow guide port (11-a) is provided at a central position of the first pipe portion (12), wherein: The sprue sleeve body (1) is provided with a protective lining (2) which is detachably connected thereto, and the protective lining (2) acts on the first cap portion (11) and also extends into the first glue flow channel (12-a), and the combination of the two allows the injection molding material to be injected into the injection mold through the sprue sleeve body (1) so as to avoid contact between the injection molding material and the inner surface of the first guide port (11-a) and the inner surface of the first glue flow channel (12-a).

2. The mold gate sleeve of the injection mold for the exhaust valve cover according to claim 1, characterized in that: The protective lining (2) comprises a second cap portion (21) having a second flow guide port (21-a), and a second pipe portion (22) having a second glue flow channel (22-a); the second cap portion (21) is detachably connected to the first cap portion (11) and covers the inner surface of the first flow guide port (11-a); the second pipe portion (22) is placed in the first pipe portion (12) and covers the inner surface of the first glue flow channel (12-a).

3. The mold gate sleeve of the injection mold of the exhaust valve cover according to claim 2, characterized in that: The first cap portion (11) is provided with an annular slot (11-b) located outside the first guide port (11-a), and the second cap portion (21) is provided with an annular insert (21-b) extending downward and inserted into the annular slot (11-b), and the combination of the two allows the final assembly position of the protective liner (2) on the sprue sleeve body (1) to be quickly defined.

4. The mold gate sleeve of the injection mold for the exhaust valve cover according to claim 3, characterized in that: The annular slot (11-b) is provided with locking rods (3) symmetrically distributed on both sides of the first guide port (11-a); one end of the locking rod (3) is fixed to the outer ring surface of the annular slot (11-b), and the other end is fixed to the inner ring surface of the annular slot (11-b); the annular insert (21-b) is provided with locking sockets (4) symmetrically distributed on both sides of the second guide port (21-a) and matched with the locking rods (3); the combination of the locking sockets (4) and the locking rods (3) is used to prevent the sprue sleeve body (1) and the protective lining (2) from separating.

5. The mold gate sleeve of the injection mold for the exhaust valve cover according to claim 4, characterized in that: The locking socket (4) is provided with a first guide channel (5) and a second guide channel (6) on the annular insert (21-b) for guiding the locking rod (3) to reach the locking socket (4) along the locking direction, and the two second guide channels (6) extend in different directions on both sides to match the rotation of the protective lining (2) when performing the locking movement.

6. The mold gate sleeve of the injection mold for the exhaust valve cover according to claim 5, characterized in that: The annular insert strip (21-b) is provided with a turning channel (7) for guiding the locking insert rod (3) from the first guide channel (5) to the second guide channel (6) via a turning direction to a locking direction.

7. The mold gate sleeve of the injection mold for the exhaust valve cover according to claim 6, characterized in that: The turning channel (7) is formed with a fitting wall (71) which completely fits on a portion of the surface of the locking rod (3) when the locking rod (3) reaches the turning channel (7).

8. The mold gate sleeve of the injection mold for the exhaust valve cover according to claim 7, characterized in that: The locking plug rod (3) has a cylindrical configuration, the locking socket (4) has an arc configuration matching the configuration of the locking plug rod (3), and the inner diameter of the arc is smaller than the outer diameter of the arc of the locking plug rod (3).

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