Engine cylinder cover cap mold

Abstract

The utility model belongs to the technical field of engine accessory dies, and particularly relates to an engine cylinder cover cap die which comprises an upper die plate and a lower die plate, a die cavity used for forming a cylinder cover cap through injection molding is formed between the upper die plate and the lower die plate, an oil gas channel is arranged on the side portion of the cylinder cover cap, and the oil gas channel comprises a vertical portion and a horizontal portion. An outer port of the vertical part is formed in the lower end face of the cylinder head cover, an outer port of the horizontal part is formed in the inner cavity wall of the cylinder head cover, and the lower die plate is provided with a vertical core-pulling column and a movable core-pulling plate capable of moving up and down relative to the lower die plate. A horizontal core-pulling protrusion which is inserted into the inner end opening of the horizontal part and abuts against the vertical core-pulling column is arranged on the side wall of the top of the movable core-pulling plate. According to the utility model, the mold cavity structure is reasonably designed, and the vertical core-pulling column is matched with the movable core-pulling plate, so that the cylinder head cover with the built-in oil-gas channel can be formed through injection molding, oil mist is effectively attached to the inner surface of the cylinder head cover through the oil-gas channel, and the oil-gas separation efficiency is higher.

Description

Technical field:

[0001] The utility model belongs to the technical field of engine parts molds, in particular to an engine cylinder cover mold. Background technology:

[0002] When a car engine is working, some exhaust gas will escape through the piston ring into the crankcase. The exhaust gas mixes with the engine oil to form oil mist and flows upward through the exhaust channel of the cylinder block to the cylinder head cover. The cooler inner surface of the cylinder head cover will gather the oil mist, causing the engine oil to condense and flow back into the oil pan. The separated exhaust gas will re-enter the combustion chamber through the engine intake system and re-organize combustion.

[0003] However, existing cylinder head covers are limited by the mold cavity design of the injection mold, and most of them are simple cover structures. The oil mist enters the cylinder head cover directly through the exhaust channel of the cylinder body and is not easy to adhere to the inner surface of the cylinder head cover. The oil and gas separation efficiency is not high. For example, a crankcase ventilation device disclosed in a Chinese invention patent (authorization announcement number CN111237029B) Summary of the invention:

[0004] The purpose of the utility model is to provide an engine cylinder head cover mold, which has a reasonably designed mold cavity structure and can injection mold a cylinder head cover with a built-in oil and gas channel by means of the cooperation of a vertical core-pulling column and a movable core-pulling plate, so that the oil mist is effectively attached to the inner surface of the cylinder head cover through the oil and gas channel, and the oil and gas separation efficiency is high.

[0005] The utility model is achieved in this way:

[0006] A mold for an engine cylinder head cover comprises an upper template and a lower template, wherein a mold cavity for injection molding a cylinder head cover is formed between the upper and lower templates, and an oil and gas channel is provided on the side of the cylinder head cover, and the oil and gas channel comprises a vertical portion arranged vertically, and a horizontal portion arranged horizontally and connected to the vertical portion at its inner end, an outer port of the vertical portion is opened on the lower end surface of the cylinder head cover, and an outer port of the horizontal portion is opened on the inner cavity wall of the cylinder head cover, and the lower template located in the mold cavity is provided with a vertical core pulling column inserted in the vertical portion, and a movable core pulling plate that can move up and down relative to the lower template, and a horizontal core pulling protrusion is provided on the top side wall of the movable core pulling plate, which is inserted into the inner port of the horizontal portion and abuts against the vertical core pulling column.

[0007] In the above-mentioned engine cylinder head cover mold, there are two oil and gas channels, which are respectively located on the left and right sides of the cylinder head cover. The vertical core pulling columns and movable core pulling plates correspond one-to-one to the number and positions of the oil and gas channels.

[0008] In the above-mentioned engine cylinder cover mold, a matching through hole is opened on the lower template, the bottom end of the movable core-pulling plate passes through from top to bottom and movably fits on the matching through hole, and the top of the movable core-pulling plate has a limiting step surface with an outer diameter larger than the diameter of the matching through hole.

[0009] In the above-mentioned engine cylinder head cover mold, the top end of the movable core pulling plate is inclined toward the inner side of the cylinder head cover and the bottom end is inclined toward the outer side of the cylinder head cover. The top surface of the horizontal core pulling protrusion and the corresponding inner wall of the horizontal part are both matching guide arc surfaces. When the cylinder head cover moves upward relative to the lower template for demolding, the movable core pulling plate moves upward at an angle to drive the horizontal core pulling protrusion to move outward relative to the horizontal part until the two are separated.

[0010] In the above-mentioned engine cylinder cover mold, the vertical core-pulling column is a frustum structure with a smaller outer diameter at the top and a larger outer diameter at the bottom.

[0011] The outstanding advantages of the utility model compared with the prior art are:

[0012] The utility model rationally designs the mold cavity structure, and with the help of the cooperation between the vertical core-pulling column and the movable core-pulling plate, can injection mold a cylinder head cover with a built-in oil and gas channel, so that the oil mist is effectively attached to the inner surface of the cylinder head cover through the oil and gas channel, and the oil and gas separation efficiency is relatively high. Description of the drawings:

[0013] Figure 1 It is a cross-sectional view of the cylinder head cover of the present utility model;

[0014] Figure 2 This is a three-dimensional diagram of the mold of the utility model;

[0015] Figure 3 It is a cross-sectional view of the mold of the present utility model.

[0016] In the figure: 1. Upper template; 2. Lower template; 3. Cylinder head cover; 4. Oil and gas channel; 5. Vertical part; 6. Horizontal part; 7. Vertical core pulling column; 8. Movable core pulling plate; 9. Horizontal core pulling protrusion. Specific implementation method:

[0017] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0018] A mold for an engine cylinder head cover comprises an upper template 1 and a lower template 2, wherein a mold cavity for injection molding a cylinder head cover 3 is formed between the upper template 1 and the lower template 2, and the side of the cylinder head cover 3 is provided with an oil and gas channel 4, and the oil and gas channel 4 comprises a vertical portion 5 arranged vertically, and a horizontal portion 6 arranged horizontally and connected to the vertical portion 5 at its inner end, the outer port of the vertical portion 5 is opened on the lower end surface of the cylinder head cover 3, and the outer port of the horizontal portion 6 is opened on the inner cavity wall of the cylinder head cover 3, and the lower template 2 located in the mold cavity is provided with a vertical core pulling column 7 inserted in the vertical portion 5, and a movable core pulling plate 8 that can move up and down relative to the lower template 2, and the top side wall of the movable core pulling plate 8 is provided with a horizontal core pulling protrusion 9 inserted into the inner port of the horizontal portion 6 and abutting against the vertical core pulling column 7.

[0019] Among them, since the movable core pulling plate 8 can move up and down relative to the lower template 2, the injection-molded cylinder head cover 3 moves upward relative to the lower template 2 during the demolding process, and moves upward together with the movable core pulling plate 8 through the horizontal core pulling protrusion 9. Then, the movable core pulling plate 8 moves horizontally relative to the cylinder head cover 3 to realize the core pulling separation of the horizontal core pulling protrusion 9 and the horizontal part 6.

[0020] The utility model rationally designs the mold cavity structure, and with the help of the cooperation between the vertical core-pulling column 7 and the movable core-pulling plate 8, the cylinder head cover 3 with the built-in oil and gas channel 4 can be injection molded, so that the oil mist is effectively attached to the inner surface of the cylinder head cover 3 through the oil and gas channel 4, and the oil and gas separation efficiency is relatively high.

[0021] Furthermore, in this embodiment, two oil and gas channels 4 are provided and are located on the left and right sides of the cylinder head cover 3 respectively. The vertical core pulling columns 7 and the movable core pulling plates 8 correspond one to one with the number and position of the oil and gas channels 4.

[0022] The specific up and down moving cooperation structure of the movable core-pulling plate 8 on the lower template 2 is as follows: a cooperation through hole is opened on the lower template 2, the bottom end of the movable core-pulling plate 8 passes through from top to bottom and movably cooperates with the cooperation through hole, and the top of the movable core-pulling plate 8 has a limiting step surface with an outer diameter larger than the diameter of the cooperation through hole.

[0023] In order to enable the movable core-pulling plate 8 to move upward together with the cylinder head cover 3 and to be able to move horizontally relative to the cylinder head cover 3 to automatically realize the core-pulling separation of the horizontal core-pulling protrusion 9 and the horizontal part 6, the top end of the movable core-pulling plate 8 is inclined toward the inside of the cylinder head cover 3 and the bottom end is inclined toward the outside of the cylinder head cover 3. The top surface of the horizontal core-pulling protrusion 9 and the corresponding inner wall of the horizontal part 6 are both matching guide arc surfaces. When the cylinder head cover 3 moves upward relative to the lower template 2 for demoulding, the movable core-pulling plate 8 moves upward at an angle to drive the horizontal core-pulling protrusion 9 to move outward relative to the horizontal part 6 until the two are separated.

[0024] In addition, the vertical core-pulling column 7 is a frustum structure with a smaller outer diameter at the top and a larger outer diameter at the bottom.

[0025] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An engine cylinder cover mold, characterized by: The invention comprises an upper template (1) and a lower template (2), wherein a mold cavity for injection molding a cylinder head cover (3) is formed between the upper template (1) and the lower template (2), and the side of the cylinder head cover (3) is provided with an oil and gas channel (4), and the oil and gas channel (4) comprises a vertical portion (5) arranged in the vertical direction, and a horizontal portion (6) arranged in the horizontal direction and the inner end of which is connected to the vertical portion (5), the outer end of the vertical portion (5) is opened on the lower end surface of the cylinder head cover (3), and the outer end of the horizontal portion (6) is opened on the inner cavity wall of the cylinder head cover (3), and the lower template (2) located in the mold cavity is provided with a vertical core-pulling column (7) inserted in the vertical portion (5), and a movable core-pulling plate (8) that can move up and down relative to the lower template (2), and a horizontal core-pulling protrusion (9) inserted into the inner end of the horizontal portion (6) and abutting against the vertical core-pulling column (7) is provided on the top side wall of the movable core-pulling plate (8).

2. The engine cylinder cover mold according to claim 1, characterized in that: The oil and gas passages (4) are provided with two and are respectively located on the left and right sides of the cylinder head cover (3); the vertical core pulling columns (7) and the movable core pulling plates (8) correspond one to one with the number and position of the oil and gas passages (4).

3. The engine cylinder cover mold according to claim 1, characterized in that: A matching through hole is provided on the lower template (2), and the bottom end of the movable core-pulling plate (8) passes through from top to bottom and movably fits on the matching through hole. The top of the movable core-pulling plate (8) has a limiting step surface with an outer diameter larger than the diameter of the matching through hole.

4. An engine cylinder cover mold according to claim 1, 2 or 3, characterized in that: The top end of the movable core-pulling plate (8) is tilted toward the inside of the cylinder head cover (3) and the bottom end is tilted toward the outside of the cylinder head cover (3). The top surface of the horizontal core-pulling protrusion (9) and the corresponding inner wall of the horizontal portion (6) are both matched guide arc surfaces. When the cylinder head cover (3) moves upward relative to the lower template (2) for demoulding, the movable core-pulling plate (8) moves tilted upward to drive the horizontal core-pulling protrusion (9) to move outward relative to the horizontal portion (6) until the two are separated.

5. The engine cylinder cover mold according to claim 1, characterized in that: The vertical core-pulling column (7) is a frustum structure with a smaller outer diameter at the top and a larger outer diameter at the bottom.

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