CN118650821A - An injection mold and an injection molding device for automobile parts - Google Patents

Abstract

The invention relates to the technical field of injection molds, in particular to an injection mold and an injection molding device for automobile accessories, which comprise a top plate, wherein a thimble is arranged on one side of the top plate opposite to a movable mold, a hole column allowing the thimble to pass through in a sliding manner is arranged on the movable mold, and an auxiliary mechanism is arranged on the thimble. The auxiliary mechanism comprises an auxiliary plate which is sleeved on the thimble in a sliding way, a sleeve which is sleeved on the thimble in a sliding way is arranged on the side surface of the auxiliary plate opposite to the movable die, the sleeve stretches into the corresponding hole column in a sliding way, and a driving piece which drives the auxiliary plate to reciprocate along the axial direction of the thimble is arranged on the top plate. The inner wall of one end of the hole column, which points to the fixed die, is provided with a small hole, the small hole is communicated with the outside, and the sleeve tube reciprocates on the thimble and simultaneously realizes the opening or closing of the small hole. The invention makes the demoulding process more automatic and intelligent, is beneficial to reducing manual intervention, reducing labor intensity, improving production efficiency, and in addition, through the structural design of the air hole and the air passage, improving injection molding efficiency and optimizing the dimensional accuracy and appearance quality of the workpiece.

Description

An injection mold and an injection molding device for automobile parts

Technical Field

The invention relates to the technical field of injection molds, and in particular to an automobile parts injection mold and an injection molding device.

Background Art

Automobile plastic parts are mainly processed by injection molding devices, which consist of extruders and injection molds, and are used to manufacture plastic products of various shapes and sizes. In the injection molding process, the extruder transports the heated molten plastic to the nozzle through the rotation and propulsion of the screw, and then the nozzle injects the molten plastic into the cavity of the injection mold, and finally solidifies through the cooling process to form the desired plastic product.

In the prior art, when demolding through the injection mold, the workpiece is easily stuck on the movable mold. The current structure generally adopts an ejector mechanism to assist in demolding. However, due to excessive injection pressure or incomplete curing, the workpiece is easily adhered to the end of the ejector pin. At this time, it is necessary to manually assist in demolding the workpiece through external force. For workpieces with larger specifications, manual demolding requires a lot of manpower. In addition, the workpiece is easily damaged by uneven external force.

In the prior art, a Chinese patent application document with application publication number CN118124092A discloses an easy-to-demold injection molding device, in which the mold is arranged on the movable mold, and the side of the mold close to the static mold is the molding part, and the molding part is provided with a plurality of avoidance grooves extending along its axial direction, one end of the avoidance groove is connected to the outer peripheral wall of the molding part, the molding part is coaxial with the molded workpiece, and the mold is installed on the movable mold around the axial rotation of the molding part. When used specifically, the workpiece is demolded by rotating the molding part. When the above scheme is used for demolding, the avoidance groove structure may affect the flow path and speed of the molten plastic in the mold cavity, thereby affecting the molding accuracy and appearance quality of the injection molded part. In addition, when the excess plastic in the avoidance groove is cut off, it will also affect the stability of the demolding structure, thereby causing damage or deformation to the injection molded part.

Summary of the invention

The invention provides an automobile parts injection mold and an injection molding device, so as to solve the technical problems in the prior art that manual intervention is often required during demoulding of the injection mold and the workpiece is easily damaged or deformed.

In order to solve the above problems, the present invention provides an automobile parts injection mold and an injection molding device adopting the following technical solutions:

An injection mold for automobile parts comprises a movable mold, a fixed mold and a demoulding mechanism supported by a frame, wherein the movable mold and the fixed mold are arranged opposite to each other, the demoulding mechanism is arranged on a side of the movable mold away from the fixed mold, the frame is provided with a power assembly for driving the demoulding mechanism and the movable mold to move, the demoulding mechanism comprises a top plate, an ejector pin is arranged on a side of the top plate opposite to the movable mold, a hole column is arranged on the movable mold for allowing the ejector pin to slide through, and an auxiliary mechanism is arranged on the ejector pin.

The auxiliary mechanism includes an auxiliary plate slidably mounted on the ejector pin, a sleeve slidably mounted on the ejector pin is provided on the side of the auxiliary plate opposite to the movable mold, the sleeve slidably extends into the corresponding hole column, and a driving member is provided on the ejector plate to drive the auxiliary plate to reciprocate along the axial direction of the ejector pin.

A small hole is arranged on the inner wall of one end of the hole column pointing to the fixed mold, and the small hole is connected to the outside. The sleeve reciprocates on the ejector pin while realizing the opening or closing of the small hole.

By adopting the above technical solution, the ejector and the sleeve interact with each other, making the demoulding process more automated and intelligent, which helps to reduce manual intervention, reduce labor intensity, and improve production efficiency. The opening or closing of the small hole is coordinated by the reciprocating movement of the sleeve. The small hole set in the hole column and its matching design with the sleeve make it possible to adjust the air pressure inside the mold during the injection molding process. The air pressure adjustment provides a slight negative pressure during injection molding. The negative pressure state can be used as a driving force to help the plastic melt flow to all corners of the injection cavity faster, especially in complex or slender mold structures, which helps to reduce the resistance of the melt during the flow process and improve the filling speed and efficiency.

In addition, during the demolding process, cold air is blown in through the small hole to improve the cooling effect of the contact area between the workpiece and the ejector pin, making the workpiece easier to release during the demolding process, reducing the difficulty of demolding and the risk of damage to the workpiece due to improper demolding.

Furthermore, the number of the hole columns is n and arranged at intervals, wherein n≥2, and the small holes on adjacent hole columns are connected through a first air channel provided on the movable mold.

Furthermore, connecting pipes are provided on both sides of the movable mold, and a second air channel connected to the connecting pipe is provided on the movable mold, the axis of the second air channel is perpendicular to the axis of the first air channel, and the second air channel is connected to the adjacent small hole.

By adopting the above technical solution, through the first air duct distributed and connected in the movable mold, when cold air is introduced into the small holes, it helps to make the cold air blow evenly to multiple areas of the injection molded part, improve the cooling efficiency, and make the demoulding process smoother.

Furthermore, the diameter of the first air channel is greater than the diameter of the second air channel, and the diameter of the second air channel is the same as the diameter of the inner wall of the connecting pipe.

By adopting the above technical solution, during the process of introducing cold air flow, the air flow first passes through the narrower second airway to accelerate, and then reaches the first airway. The gas flow rate will be relatively reduced and the total flow rate of the gas will increase, thereby increasing the supply of cold air and improving the cooling effect.

Furthermore, a protrusion for cooperating to form an injection cavity is provided on the side opposite to the movable mold and the fixed mold, and a movable block is provided at the four corners of the protrusion. A guide column is provided on the side of the movable block away from the fixed mold, and the guide column slides through the movable mold and is fixedly connected to the top plate. A spring is sleeved on the guide column and is located between the movable mold and the top plate.

By adopting the above technical solution, the demoulding is assisted by the moving block, which reduces the difficulty of demoulding. The spring assists in resetting and improves the stability during the demoulding process.

Furthermore, an exhaust hole is provided on the side surface of the movable mold opposite to the fixed mold, the exhaust hole passes through the top of the movable mold and is connected to the outside, and a locking mechanism for controlling the opening and closing of the exhaust hole is provided at the top of the movable mold.

Furthermore, the locking mechanism includes a sealing cover plate and a telescopic member driving the sealing cover plate to move back and forth, and the telescopic member controls the opening and closing of the exhaust hole when driving the sealing cover plate to move back and forth.

By adopting the above technical solution, through the exhaust hole and the locking mechanism that controls the opening and closing of the exhaust hole, it is ensured that during different injection molding stages or the production process of different injection molded parts, the opening degree of the exhaust hole can be adjusted or completely closed as needed to meet different exhaust needs.

Furthermore, the power assembly includes a base plate and a screw mechanism that drives the base plate to reciprocate, a side plate is provided on the side of the base plate opposite to the movable mold, the side plate and the movable mold are fixedly connected via a connecting column, a first guide rod is provided on the side plate that slides through the top plate, a push rod is provided on the side of the top plate opposite to the side plate that slides through the side plate and the base plate, a fixed plate is provided on the side of the base plate away from the side plate, and a boss corresponding to the push rod is provided on the fixed plate.

An injection molding device comprises an automobile part injection molding die and an extruder for extruding a casting material into the automobile part injection molding die. The automobile part injection molding die is the above-mentioned automobile part injection molding die.

The beneficial effects of the present invention are as follows: the present invention makes the demoulding process more automated and intelligent through the interaction between the ejector pin and the sleeve, which helps to reduce manual intervention, reduce labor intensity, and improve production efficiency. In addition, the opening or closing of the small hole is coordinated by the reciprocating motion of the sleeve. The small hole set in the hole column and its coordinated design with the sleeve make it possible to adjust the air pressure inside the mold during the injection molding process, which on the one hand assists the demoulding process, and on the other hand improves the filling speed and efficiency during injection molding; furthermore, cold air can be introduced through the small hole during demoulding, making it easier for the workpiece to be released during the demoulding process, reducing the difficulty of demoulding, and also reducing the risk of damage to the workpiece due to improper demoulding.

BRIEF DESCRIPTION OF THE DRAWINGS

By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

FIG1 is a schematic structural diagram of an injection mold for automobile parts in the present invention;

FIG2 is a cross-sectional view of an injection mold for automobile parts according to the present invention;

FIG3 is a partial enlarged view of area A in FIG2 ;

FIG4 is a schematic structural diagram of a demoulding mechanism in the present invention;

FIG5 is a schematic structural diagram of a movable mold in the present invention;

FIG6 is a partial structural cross-sectional view of the movable mold in the present invention;

FIG7 is a partial schematic diagram of the external cooperation of the movable mold in the present invention;

FIG8 is a schematic structural diagram of a sealing cover plate in the present invention.

Description of reference numerals:

1. Frame; 11. Bottom plate; 111. Guide shaft; 12. Side plate; 121. First guide rod; 13. Connecting column; 14. Fixed plate; 141. Boss; 15. Base plate; 2. Moving mold; 21. Hole column; 211. Small hole; 212. First air channel; 213. Second air channel; 22. Connecting pipeline; 23. Moving block; 231. Guide column; 232. Spring; 24. Exhaust hole; 25. Sealing cover plate; 26. Telescopic member; 27. Guide groove plate; 3. Fixed mold; 4. Demolding mechanism; 41. Ejector plate; 42. Ejector pin; 43. Auxiliary mechanism; 431. Auxiliary plate; 432. Sleeve; 44. Push rod.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Any number of elements in the drawings is for illustration and not limitation, and any naming is for distinction only and does not have any limiting meaning.

The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

An embodiment of an automobile parts injection mold and an injection molding device provided by the present invention:

As shown in Figures 1 and 2, an injection mold for automobile parts includes a movable mold 2, a fixed mold 3 and a demolding mechanism 4 supported by a frame 1. The movable mold 2 and the fixed mold 3 are arranged opposite to each other, and the demolding mechanism 4 is arranged on a side of the movable mold 2 away from the fixed mold 3. A power component for driving the demolding mechanism 4 and the movable mold 2 to move is provided on the frame 1.

In this embodiment, the power assembly includes a base plate 11 and a screw mechanism that drives the base plate 11 to reciprocate, wherein a base plate 15 for supporting the fixed mold 3 is also provided on the frame 1, a fixed plate 14 is provided on the side of the base plate 11 away from the fixed mold 3, the screw mechanism includes a screw rotatably supported between the base plate 15 and the fixed plate 14, and a motor that drives the screw to rotate is provided on one side of the fixed plate 14.

In order to improve the support stability of the base plate 15 and the fixing plate 14 , a connecting frame is fixedly connected between the base plate 15 and the fixing plate 14 .

The lead screw passes through the base plate 11 through threaded cooperation, and the base plate 11 is driven to reciprocate along the axial direction of the lead screw through rotation. A guide shaft 111 is provided on the side opposite to the fixed plate 14. The guide shaft 111 slides through the fixed plate 14, and the stability of the movement of the base plate 11 is improved through the cooperation of the guide shaft 111.

A side plate 12 is provided on the side opposite to the bottom plate 11 and the movable mold 2. The side plate 12 and the movable mold 2 are fixedly connected via a connecting column 13. A first guide rod 121 is provided on the side plate 12 and slides through the top plate 41. A push rod 44 is provided on the side opposite to the top plate 41 and slides through the side plate 12 and the bottom plate 11. A boss 141 corresponding to the push rod 44 is provided on the fixed plate 14.

As shown in FIGS. 1 to 4 , in this embodiment, the demoulding mechanism 4 includes a top plate 41 , a top plate 41 is provided with a top pin 42 on the side opposite to the movable mold 2 , a hole column 21 is provided on the movable mold 2 to allow the top pin 42 to slide through, and an auxiliary mechanism 43 is provided on the top pin 42 .

The auxiliary mechanism 43 includes an auxiliary plate 431 slidably mounted on the ejector pin 42. A sleeve 432 slidably mounted on the ejector pin 42 is provided on the side of the auxiliary plate 431 opposite to the movable mold 2. The sleeve 432 slides into the corresponding hole column 21. A driving member is provided on the ejector plate 41 to drive the auxiliary plate 431 to reciprocate along the axial direction of the ejector pin 42.

Specifically, the driving member in this embodiment is a cylinder, and in other embodiments it can also be a hydraulic cylinder or an electric telescopic rod.

The side of the top plate 41 is provided with a Z-shaped plate extending outward, the cylinder is fixed on the Z-shaped plate, the side of the auxiliary plate 431 is provided with an L-shaped plate extending outward, and the telescopic rod driving end of the cylinder is fixedly connected to the L-shaped plate. The horizontal plate on the L-shaped plate is close to the horizontal plate outside the Z-shaped plate, which improves the stability of the cylinder during driving.

When demolding is required, after the movable mold 2 and the fixed mold 3 are separated, when they are ejected by the action of the ejector plate 41, the right end of the sleeve 432 is flush with the right end of the ejector pin 42. In order to prevent the workpiece from adhering to the top of the ejector pin 42, the sleeve 432 is extended out of the ejector pin 42 to the left and then to the right through the action of the driving member, and the workpiece is detached from the end of the ejector pin 42 while extending.

The interaction between the ejector pin 42 and the sleeve 432 makes the demoulding process more automated and intelligent, which helps to reduce manual intervention, lower labor intensity, and improve production efficiency.

A small hole 211 is provided on the inner wall of one end of the hole column 21 pointing to the fixed mold 3 . The small hole 211 is connected to the outside. The sleeve 432 reciprocates on the ejector pin 42 to open or close the small hole 211 .

As shown in FIG. 5 and FIG. 6 , there are 12 hole columns 21 arranged at intervals, and the small holes 211 on adjacent hole columns 21 are connected through a first air channel 212 provided on the movable mold 2 .

Furthermore, connecting pipes 22 are provided on both sides of the movable mold 2 . A second air channel 213 communicating with the connecting pipe 22 is provided on the movable mold 2 . The axis of the second air channel 213 is perpendicular to the axis of the first air channel 212 . The second air channel 213 communicates with the adjacent small hole 211 .

Furthermore, the diameter of the first air channel 212 is greater than the diameter of the second air channel 213 , and the diameter of the second air channel 213 is the same as the diameter of the inner wall of the connecting pipe 22 .

The opening or closing of the small hole 211 is coordinated by the reciprocating movement of the sleeve 432. When the injection molding is completed, the workpiece is tightly attached between the movable mold 2 and the fixed mold 3, and the sleeve 432 first moves to the left to expose the small hole 211 on the hole column 21, that is, it is opened. A valve is provided on the connecting pipe 22, and a vacuum is drawn through the connecting pipe 22 to form a slight negative pressure area at the end of the hole column 21 opposite to the workpiece. At this time, it can be ensured that when the movable mold 2 and the fixed mold 3 are separated, the workpiece is attached to the movable mold 2, that is, the workpiece is prevented from being attached to the fixed mold 3.

Subsequently, cold air is blown into the interior through the connecting pipe 22 to assist cooling. During the demolding process, cold air is blown in through the small hole 211 to improve the cooling effect of the contact area between the workpiece and the ejector pin 42, making the workpiece easier to release during the demolding process, reducing the difficulty of demolding and the risk of damage to the workpiece due to improper demolding.

It should be noted that the cold air blown in through the small hole 211 can directly contact the corresponding workpiece area, ensuring the cooling and solidification of the key area on the workpiece, avoiding the corresponding area of the workpiece, i.e., the part in contact with the ejector pin 42, from being deformed due to external force during demolding, thereby improving the dimensional accuracy and appearance quality of the workpiece.

In addition, when the movable mold 2 and the fixed mold 3 are combined for injection molding, before the material is extruded through the extruder, the small hole 211 can be opened by the movable sleeve 432, and then the air pressure of the injection cavity can be adjusted through the connecting pipe 22, so that a slightly negative pressure state is formed in the injection cavity. The slightly negative pressure state can be used as a driving force to help the plastic melt flow to all corners of the injection cavity faster, especially in complex or slender mold structures, which helps to reduce the resistance of the melt during the flow process and improve the filling speed and efficiency.

In addition, under the condition of slight negative pressure, the injection pressure can better act on the melt, making it fill the mold more tightly. This helps to improve the density and dimensional accuracy of the injection molded parts and reduce shrinkage, deformation and other problems caused by insufficient melt compaction.

As shown in FIG. 4 , in this embodiment, a convex block for cooperating to form an injection cavity is provided on the side opposite to the movable mold 2 and the fixed mold 3, and a movable block 23 is provided at the four corners of the convex block. A guide column 231 is provided on the side of the movable block 23 away from the fixed mold 3. The guide column 231 slides through the movable mold 2 and is fixedly connected to the top plate 41. A spring 232 is sleeved on the guide column 231 and is located between the movable mold 2 and the top plate 41.

During specific use, when the top plate 41 is pushed to the right for demoulding, the guide column 231 pushes the moving block 23 out of the surface of the protrusion, and at the same time assists in pushing the workpiece off the protrusion, thereby reducing the difficulty of demoulding.

When the guide pillar 231 is pushed out, the spring 232 is compressed to improve the stability of the top plate 41 when it is pushed out. In addition, after the demoulding is completed, the top plate 41 is reset by the spring 232.

As shown in Figures 7 and 8, in this embodiment, an exhaust hole 24 is provided on the side opposite to the fixed mold 3 of the movable mold 2. The exhaust hole 24 passes through the top of the movable mold 2 and is connected to the outside. A locking mechanism for controlling the opening and closing of the exhaust hole 24 is provided at the top of the movable mold 2.

The locking mechanism includes a sealing cover plate 25 and a telescopic member 26 for driving the sealing cover plate 25 to move back and forth. The telescopic member 26 controls the opening and closing of the exhaust hole 24 when driving the sealing cover plate 25 to move back and forth.

In this embodiment, the telescopic member 26 is a cylinder.

Specifically, a guide groove plate 27 is provided at the top of the movable mold 2, and two telescopic members 26 are fixedly arranged on both sides of the guide groove plate 27. The sealing cover plate 25 includes a covering part that slides with the guide groove plate 27, and side wings extending outward are provided on both sides of the covering part. The driving end of the telescopic member 26 is connected to the side wings.

An injection molding device comprises an automobile part injection molding die and an extruder for extruding a casting material into the automobile part injection molding die, wherein the automobile part injection molding die is the above-mentioned automobile part injection molding die.

When in use, the movable mold 2 and the fixed mold 3 are in a closed mold state in the initial state, and an injection cavity is formed between the movable mold 2 and the fixed mold 3. A pouring channel connected to the injection cavity is provided on the fixed mold 3. The pouring material is extruded from the pouring channel into the injection cavity by an extruder, and the mold is demolded after injection and cooling. During injection molding, a negative pressure environment can be formed in the injection cavity.

When specifically performing demoulding, first move the sleeve 432 to open the small hole 211, and draw a vacuum through the connecting pipe 22 to form a micro-negative pressure area at the end of the hole column 21 opposite to the workpiece. At this time, it can be ensured that when the movable mold 2 and the fixed mold 3 are separated, the workpiece is attached to the movable mold 2. The rotation of the lead screw drives the bottom plate 11 to move left, and the movable mold 2 moves left and separates from the fixed mold 3. The workpiece is attached to the movable mold 2 and continues to move. The push rod 44 contacts the boss 141, and then the top plate 41 moves to the right, so that the ejector pin 42 extends out of the hole column 21, and the moving block 23 extends out of the convex block to push the workpiece out. Then the sleeve 432 separates the workpiece from the ejector pin 42 through the action of the driving member, completing the demoulding process. The demoulding process is more automated and intelligent. It helps to reduce manual intervention, reduce labor intensity, and improve production efficiency.

In addition, when demolding, cold air is blown into the interior through the connecting pipe 22 to assist cooling. During the demolding process, cold air is blown in through the small hole 211 to improve the cooling effect of the contact area between the workpiece and the ejector pin 42, making the workpiece easier to release during the demolding process, reducing the difficulty of demolding and the risk of damage to the workpiece due to improper demolding.

According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims (9)

1. The utility model provides an auto-parts injection mold, includes movable mould (2), cover half (3) and demoulding mechanism (4) that support through frame (1), movable mould (2) and cover half (3) set up relatively, demoulding mechanism (4) are located movable mould (2) and are kept away from one side of cover half (3), be equipped with the power pack that drive demoulding mechanism (4) and movable mould (2) removed on frame (1), a serial communication port, demoulding mechanism (4) include roof (41), roof (41) are equipped with thimble (42) with the opposite side of movable mould (2), be equipped with hole post (21) that allow thimble (42) to slip throughout on movable mould (2), be equipped with auxiliary mechanism (43) on thimble (42);

The auxiliary mechanism (43) comprises an auxiliary plate (431) which is sleeved on the thimble (42) in a sliding manner, a sleeve (432) which is sleeved on the thimble (42) in a sliding manner is arranged on the side surface, opposite to the movable die (2), of the auxiliary plate (431), the sleeve (432) stretches into the corresponding hole column (21) in a sliding manner, and a driving piece which drives the auxiliary plate (431) to reciprocate along the axial direction of the thimble (42) is arranged on the top plate (41);

the inner wall of one end of the hole column (21) pointing to the fixed die (3) is provided with a small hole (211), the small hole (211) is communicated with the outside, and the sleeve (432) realizes opening or closing of the small hole (211) while reciprocating on the ejector pin (42).

2. The injection mold for automobile parts according to claim 1, wherein the number of the hole columns (21) is n, wherein n is more than or equal to 2, which are arranged at intervals, and the small holes (211) on the adjacent hole columns (21) are communicated through a first air passage (212) arranged on the movable mold (2).

3. The auto-parts injection mold according to claim 2, wherein both sides of movable mould (2) are equipped with connecting tube (22), be equipped with on movable mould (2) with connecting tube (22) second air flue (213) of intercommunication, the axis of second air flue (213) is perpendicular with the axis of first air flue (212), second air flue (213) and adjacent aperture (211) intercommunication.

4. An auto-parts injection mold according to claim 3, characterized in that the first air channel (212) has a larger diameter than the second air channel (213), and the second air channel (213) has a diameter identical to the diameter of the inner wall of the connecting pipe (22).

5. The injection mold for automobile accessories according to claim 1, wherein the side surface of the movable mold (2) opposite to the fixed mold (3) is provided with a bump for matching to form an injection cavity, four corners of the bump are respectively provided with a movable block (23), one side of the movable block (23) far away from the fixed mold (3) is provided with a guide pillar (231), the guide pillar (231) penetrates through the movable mold (2) in a sliding manner and is fixedly connected with a top plate (41), and the guide pillar (231) is sleeved with a spring (232) between the movable mold (2) and the top plate (41).

6. The injection mold for automobile parts according to claim 1, wherein the side surface of the movable mold (2) opposite to the fixed mold (3) is provided with an exhaust hole (24), the exhaust hole (24) is communicated with the outside through the top end of the movable mold (2), and the top end of the movable mold (2) is provided with a locking mechanism for controlling the opening and closing of the exhaust hole (24).

7. The injection mold for automobile parts according to claim 6, wherein the locking mechanism comprises a sealing cover plate (25) and a telescopic member (26) driving the sealing cover plate (25) to reciprocate, and the telescopic member (26) controls the opening and closing of the exhaust hole (24) when driving the sealing cover plate (25) to reciprocate.

8. The auto-parts injection mold according to claim 1, characterized in that the power component comprises a bottom plate (11) and a screw rod mechanism for driving the bottom plate (11) to reciprocate, a side plate (12) is arranged on the opposite side surface of the bottom plate (11) and the movable die (2), the side plate (12) is fixedly connected with the movable die (2) through a connecting column (13), a first guide rod (121) which penetrates through the top plate (41) in a sliding manner is arranged on the side surface of the side plate (12) opposite to the top plate (41), a push rod (44) which penetrates through the side plate (12) and the bottom plate (11) in a sliding manner is arranged on the opposite side surface of the top plate (41) and opposite to the side plate (12), a fixed plate (14) is arranged on one side of the bottom plate (11) far from the side plate (12), and a boss (141) corresponding to the push rod (44) is arranged on the fixed plate (14).

9. An injection molding device comprising an auto-part injection mold and an extruder for extruding a casting material into the auto-part injection mold, wherein the auto-part injection mold is the auto-part injection mold of any one of claims 1-8.