Injection mold cleaning device

Abstract

The present invention discloses a cleaning device for an injection mold, the key points of the technical solution are: a flushing plate is arranged on a frame for the mold to slide into; a flushing component is installed above the frame and slides along the X-Y axis of the horizontal plane; a lifting rod is installed below the frame for ejecting the ejector pins of the mold, the lifting rod includes a lower rod part and an upper rod part, the upper rod part and the lower rod part are magnetically connected, the flushing plate is provided with an opening for the upper rod part to move in and out up and down, the length of the upper rod part is smaller than the diameter of the opening, and an elastic circular ring piece is sealed and fixed between the opening and the upper rod part; when the lifting rod descends to the bottom, the upper rod part is located below the upper surface of the flushing plate; when the lifting rod is extended to the top, the circular ring piece is in a tensioned state, and the lower rod part is located below the upper surface of the flushing plate; the opening, the upper rod part and the circular ring piece are coaxially arranged, so as to achieve the purpose of convenient and effective cleaning of the ejector pins of the mold.

Description

Technical Field

[0001] The present invention relates to a mold cleaning device, and more particularly to a cleaning device for an injection mold. Background Art

[0002] Injection molds are a common type of mold. Before the injection molding process, the mold needs to be cleaned, primarily to remove the anti-rust oil in the mold cavity to prevent oil stains from adhering to the finished product, thereby affecting the stability of the injection molding process. Existing injection mold cleaning methods involve manually spraying and rinsing the inner wall of the mold cavity. However, the mold contains ejector pins that eject the product, and these pins normally extend into the mold plate, making cleaning very difficult. Summary of the Invention

[0003] The purpose of the present invention is to provide a cleaning device for an injection mold, so as to achieve the purpose of conveniently and effectively cleaning the ejector pins of the mold.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A cleaning device for an injection mold comprises a frame, a flushing plate arranged on the frame for the mold to slide into; a flushing assembly installed above the frame and sliding along the XY axis of the horizontal plane; a lifting rod installed below the frame for ejecting the ejector pin of the mold, the lifting rod comprising a lower rod portion and an upper rod portion, the upper rod portion and the lower rod portion being magnetically connected, an opening being provided on the flushing plate for the upper rod portion to move in and out up and down, the length of the upper rod portion being smaller than the diameter of the opening, and an elastic annular plate being sealed and fixed between the opening and the upper rod portion; when the lifting rod descends to the bottom, the upper rod portion is located below the upper surface of the flushing plate; when the lifting rod is extended to the top, the annular plate is in a tensioned state, and the lower rod portion is located below the upper surface of the flushing plate; the opening, the upper rod portion and the annular plate are coaxially arranged.

[0006] Preferably, the mating surfaces of the upper rod and the lower rod are provided with a hemispherical positioning hole and a positioning block, the positioning block and the positioning hole cooperate for positioning, the positioning block is telescopic in the lower rod, and the lower rod is provided with a spring to hold the positioning block in the extended position.

[0007] Preferably, the frame includes a sliding entrance, a side stopper and a front stopper; the side stopper is located on one side of the flushing plate, and the side stopper is provided with a guide roller for the side of the mold to fit; the front stopper is located at the front end of the flushing plate, and the sliding entrance is located at the rear end of the flushing plate, and the front stopper blocks the mold to position the top holding station of the mold directly above the upper rod; the front stopper and the side stopper are arranged vertically, and there is a gap between the front stopper and the side stopper.

[0008] Preferably, the frame is provided with a No. 1 screw assembly for driving the side stopper to move toward the opening, and the minimum distance between the side stopper and the opening is greater than 10 cm; the frame is provided with a No. 2 screw assembly for driving the front stopper to move toward the opening.

[0009] Preferably, the upper surface of the flushing plate is provided with a plurality of balls for supporting the mold.

[0010] Preferably, drainage holes are provided on the upper surface of the flushing plate.

[0011] Preferably, the upper surface of the flushing plate is arranged obliquely downward toward the sliding entrance, the drainage hole is located at the rear end of the flushing plate, and a water receiving box is provided below the flushing plate, with the opening of the box located below the drainage hole.

[0012] Preferably, a crossbeam slides above the frame, and a No. 1 transmission belt in the X-axis direction is provided between the crossbeam and the frame, and the No. 1 transmission belt drives the crossbeam to move back and forth along the X-axis direction; the flushing component slides on the crossbeam, and a No. 2 transmission belt in the Y-axis direction is provided between the crossbeam and the flushing component, and the No. 2 transmission belt drives the flushing component to move back and forth along the Y-axis direction.

[0013] Preferably, the flushing assembly comprises a liquid spray port and an air jet port directed toward the flushing plate.

[0014] Preferably, the side surface of the upper rod portion is wrapped with a flexible layer, and the lifting rod is a power push rod.

[0015] In summary, the present invention has at least one of the following beneficial effects:

[0016] (1) The lifting rod ejects the ejector pin of the mold at the flushing plate position, and the moving spray facilitates the spray cleaning of the mold cavity and the ejector pin, avoiding oil stains remaining at the ejector pin position, making ejector cleaning convenient and effective;

[0017] Secondly, the lifting rod adopts the upper and lower parts of magnetic attraction to provide a certain degree of protection for the mold and the lifting rod. This is mainly to prevent the mold from being removed by careless employees when the lifting rod has not moved down, which may cause a violent collision between the lifting rod and the mold. In the event of a lateral impact, the upper rod part can be quickly detached due to the magnetic design, and the main body of the lifting rod is protected from impact. Moreover, the lifting rod will not continue to squeeze the mold after detachment, and the flexible layer of the upper rod part can be wrapped to reduce the damage caused by the lifting rod to the mold.

[0018] (2) The circular ring acts as a water barrier under the opening to prevent water on the flushing plate from dripping onto the main body of the lifting rod along the opening, thereby reducing the damage to the lifting rod caused by long-term water flushing;

[0019] Furthermore, the elastic pull of the circular plate on the upper rod prevents the upper rod from flying away and being lost after being hit, making the search for the upper rod more efficient and convenient. The elastic pull also has a buffering effect. When the upper rod is hit and detached, it has a large kinetic energy. If the upper rod violently hits the other side of the mold ejection position, it will cause secondary impact damage to the mold. The elastic pull of the circular plate partially offsets the kinetic energy of the upper rod, and part of the kinetic energy is converted into elastic potential energy, thereby reducing the degree of secondary impact of the upper rod.

[0020] Furthermore, the ring can accelerate the movement of the upper rod to the bottom of the opening, reducing the secondary collision between the upper rod and the mold. When the upper rod is ejected, the ring deforms upward. Since the ring is evenly stressed, the upper rod is relatively stable during ejection. When the upper rod is detached, the ring has a restoring elastic force to move downward. This elastic force gives the upper rod a downward movement trend, causing the lower rod to move downward quickly.

[0021] The upper rod part is separated from the lower rod part, and the upper rod part is suspended in the opening under the action of gravity to avoid rigid collision between the upper rod part and the mold.

[0022] (3) The movement of the side stop and the front stop can match the positioning of molds of different sizes in the opening;

[0023] There is a gap between the side block and the front block to avoid collision between the two, and allows workers to hook the mold with a hook at the gap to pull the mold out of the flushing plate.

[0024] (4) Due to the obstruction of the circular ring, it is difficult for employees to accurately align the two rods by observation. The hemispherical positioning blocks and positioning holes enable the upper and lower rods to be quickly positioned and installed. By increasing the lateral locking force between the upper and lower rods, the connection between the two rods is stable when they move up and down and is not easy to fall off automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the external structure of the cleaning device in the embodiment;

[0026] Figure 2 Schematic diagram of the positional relationship between the flushing plate and the flushing assembly in the embodiment;

[0027] Figure 3 Schematic diagram of the positions of the mold, front block and side block on the flushing plate from a top view in the embodiment;

[0028] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle;

[0029] Figure 5 yes Figure 4 A magnified view of part B in FIG;

[0030] Figure 6 Schematic diagram of the magnetic block at the lower rod portion in the embodiment;

[0031] Figure 7 1 is an exploded schematic diagram of the upper rod and the lower rod in the embodiment;

[0032] Figure 8 1 is a schematic diagram of the positions of the No. 1 transmission belt, the No. 2 transmission belt and the flushing plate from a top view in the embodiment.

[0033] In the picture:

[0034] 1. Frame;

[0035] 2. Flushing plate; 21. Opening hole; 22. Ball bearing;

[0036] 3. Flushing assembly; 31. Liquid spray port; 32. Air jet port;

[0037] 4. Lifting rod; 41. Lower rod; 42. Upper rod; 43. Flexible layer; 44. Spring; 45. Guide hole;

[0038] 5. Ring slices;

[0039] 60. Magnetic block; 61. Positioning block; 62. Positioning hole;

[0040] 71. Sliding entrance; 72. Drain hole; 73. Box body;

[0041] 81. Screw rod assembly No. 1; 82. Side stop; 83. Guide roller;

[0042] 91. Screw rod assembly No. 2; 92. Front stopper;

[0043] 101. Transmission belt No. 1; 102. Transmission belt No. 2; 103. Crossbeam;

[0044] 201. Injection mold. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings.

[0046] Example 1, a cleaning device for injection mold, referring to Figure 1 , including a frame body 1 supported by a metal rod, with bottom wheels and tracks at the bottom of the frame body 1, the frame body 1 can be moved on the track to adjust its position, and the brake device of the bottom wheel is used to keep the frame body 1 stopped when performing a cleaning action;

[0047] The top and sides of the frame 1 are closed, and a sliding entrance 71 is provided. The sliding entrance 71 is rotatably connected to a door body, and the door body can be opened and closed. After the door body is opened, the sliding entrance 71 is used for the mold to slide in. The frame 1 is fixed with a rectangular flushing plate 2. The mold enters from the sliding entrance 71 and slides on the flushing plate 2 to the flushing station.

[0048] Reference Figure 1-Figure 2 The upper surface of the flushing plate 2 is provided with a plurality of balls 22 for supporting the mold. The balls 22 reduce the friction of the mold moving on the flushing plate 2 and increase the distance between the mold and the flushing plate 2 to facilitate the flow of water on the flushing plate 2.

[0049] A flushing assembly 3 is provided above the frame 1 and slides along the XY axis of the horizontal plane. Figure 2 .

[0050] The upper end of the frame 1 is provided with a track in the X-axis direction, and the crossbeam 103 slides on the track. The frame 1 is provided with a No. 1 transmission belt 101 in the X-axis direction. The No. 1 transmission belt 101 is driven by a motor on the frame 1. The No. 1 transmission belt 101 is in a tensioned state and the length direction of the No. 1 transmission belt 101 is consistent with the direction of the X-axis. The lower surface of the crossbeam 103 is fixed to the belt body of the No. 1 transmission belt 101;

[0051] Therefore, under the back and forth transmission of the first transmission belt 101 , the beam 103 can move back and forth in the X-axis direction.

[0052] A track is also provided on the crossbeam 103 , on which the connecting plate of the flushing assembly 3 slides, and the connecting plate of the flushing assembly 3 is fixedly connected to the second transmission belt 102 ;

[0053] A second transmission belt 102 is provided on the upper surface of the crossbeam 103 in the Y-axis direction. The second transmission belt 102 is driven by a motor on the crossbeam 103. The second transmission belt 102 is in a tensioned state and the length direction of the second transmission belt 102 is consistent with the direction of the Y-axis.

[0054] Therefore, the second transmission belt 102 drives the flushing assembly 3 to move back and forth independently in the Y-axis direction.

[0055] The flushing assembly 3 includes a liquid spray port 31 and an air jet port 32 facing the flushing plate 2. Both the liquid spray port 31 and the air jet port 32 are connected to respective air and liquid sources via flexible hoses. The liquid spray port 31 sprays cleaning liquid, while the air jet port 32 sprays flushing gas. In other embodiments, the number of liquid spray ports 31 may be two or three.

[0056] Therefore, the flushing component 3 can move freely along the XY axis direction to spray and flush the mold below.

[0057] The following design is made for the drainage of liquid after flushing: a drainage hole 72 is opened on the upper surface of the flushing plate 2, and the liquid can be discharged downward from the drainage hole.

[0058] Reference Question Figure 1 and Figure 3The upper surface of the flushing plate 2 is arranged obliquely downward toward the slide inlet 71. With the front stopper 92 positioned high and the slide inlet 71 low, the liquid can flow along the flushing plate 2 toward the slide inlet 71. Because the tops of all the balls 22 are on the same horizontal plane, the mold will not tilt under the support of the balls, while the liquid below the balls 22 can flow on the inclined flushing plate 2.

[0059] The drainage hole 72 is located at the rear end of the flushing plate 2, and the drainage hole 72 is close to the sliding entrance 71. A water collecting box 73 is provided under the flushing plate 2, and the opening of the box 73 is located below the drainage hole 72. This design facilitates the unified collection of liquid after cleaning.

[0060] The injection mold 201 has a positioning structure when entering the flushing plate 2. The mold cavity of the injection mold 201 faces upward, and the position of the injection mold 201 for holding is on the back, that is, the side facing the flushing plate 2. Figure 2 and Figure 3 .

[0061] The frame 1 is equipped with a side stopper 82, which is a metal straight rod. The side stopper 82 is arranged on one side of the long side of the flushing plate 2, and the side stopper 82 and the long side of the flushing plate 2 are arranged parallel to each other.

[0062] The side stopper 82 is rotatably connected to a vertically arranged guide roller 83 for the mold side to fit with, and there are multiple guide rollers 83.

[0063] The frame 1 is provided with a front stopper 92, which is fixed to the flushing plate 2 by screws;

[0064] The sliding entrance 71 and the front stopper 92 are respectively located at two ends of the flushing plate 2 .

[0065] The front stopper 92 is a long rod, which is on the horizontal plane. Figure 3 From a top-down perspective, the front block 92 and the side block 82 are arranged vertically; there is a gap between the front block 92 and the side block 82. After cleaning the mold, the user extends a hooked pull rod through the gap to the front end of the mold, hooks the mold and slides it out to the sliding entrance 71. Therefore, the existence of the gap is conducive to removing the mold from the cleaning device.

[0066] The specific working principle is that the user places the mold on the flushing plate 2 and slides it so that the side of the mold contacts the guide roller 83. Then, the mold is pushed to the position of the front stopper 92 by the pull rod. The front stopper 92 blocks and limits the sliding depth of the mold to position the mold in the top holding position.

[0067] When the mold is positioned with the front stopper 92 and the side stopper 82 in contact with each other, the lifting rod 4 is directly opposite to the ejector pin of the mold.

[0068] Next is the position and structure description of the lifting rod 4 on the flushing plate 2, refer to Figure 3-Figure 8 .

[0069] The lifting rod 4 is an electric push rod, and the main body of the electric push rod is fixed on the metal frame below the frame 1; the lifting rod 4 is arranged vertically upward;

[0070] The lifting rod 4 comprises a lower rod 41 and an upper rod 42, which are magnetically connected to each other. Four fan-shaped magnets 60 are embedded in the top surface of the lower rod 41. When the ends of the upper and lower rods 42 and 41 meet, the magnetic force of the magnets 60 secures them together. The lower rod 41 is a metal rod.

[0071] In order to further enhance the stability of the vertical connection between the upper rod 42 and the lower rod 41 , a hemispherical positioning block 61 and a positioning hole 62 are provided on the mating surfaces of the upper rod 42 and the lower rod 41 .

[0072] Reference Figure 4 and Figure 5 The lower rod 41 is provided with a vertical guide hole 45, and a spring 44 is placed in the guide hole 45, and the positioning block 61 slides in the guide hole 45; the lower edge of the positioning block 61 is fixed with a lower stopper, and the end of the guide hole 45 is fixed with an upper stopper, and the upper stopper and the lower stopper abut each other, limiting the positioning block 61 from slipping out of the guide hole 45, and the upper end of the spring 44 abuts the lower end of the positioning block 61, and the lower end of the spring 44 abuts the bottom of the guide hole 45, and the spring 44 is in a compressed state, so that the force of the spring 44 causes the spherical part of the positioning block 61 to protrude from the top of the lower rod 41; such a design enables the positioning block 61 to shrink downward when it is impacted and squeezed by the mold to provide a space for making way, so that the upper rod 42 and the lower rod 41 are smoothly separated; secondly, the elastic force of the spring 44 places the positioning block 61 at the top, so that the positioning block 61 can effectively position and cooperate with the positioning hole 62.

[0073] The hemispherical positioning block 61 is located at the center of the lower rod 41, and the magnetic block 60 is arranged around the positioning block 61;

[0074] The positioning hole 62 is located at the center of the upper rod portion 42;

[0075] When the positioning block 61 and the positioning hole 62 are matched and positioned, the axes of the upper rod 42 and the lower rod 41 are on the same straight line.

[0076] The advantage of magnetic fixation is that the two rods can be quickly separated when impacted, which can reduce the further impact of the rods on the mold;

[0077] The hemispherical positioning structure, firstly, ensures that the two rods are magnetically aligned; secondly, it increases the lateral force of the two rods so that during the rising or falling process, the combination of the lateral force and the magnetic force prevents the upper rod 42 from moving laterally with the lower rod 41 due to inertia.

[0078] Flushing plate 2 has an opening 21, the upper rod portion 42 up and down in and out of the opening 21;

[0079] The length of the upper rod 42 is smaller than the diameter of the opening 21. The diameter of the opening 21 is 40 cm, and the length of the upper rod 42 is 10 cm.

[0080] An elastic annular piece 5 is sealed and fixed between the opening 21 and the upper rod 42. The annular piece 5 is a rubber piece. The inner ring of the annular piece 5 is fixed to the outer wall of the upper rod 42 by hot melt, and the outer ring of the annular piece 5 is fixed to the inner wall of the opening 21 by hot melt. In other embodiments, glue can also be used instead of hot melt fixing.

[0081] The annular piece 5 cooperates with the large-area opening 21 so that when the upper rod 42 detaches after a collision, the opening 21 has sufficient space for the upper rod 42 to move, so as to avoid a distance collision between the upper rod 42 and the opening 21; and the annular piece 5 also has a pulling and buffering effect on the upper rod 42, reducing the impact force of the upper rod 42 on the wall of the opening 21 after being hit.

[0082] In this design, the axis of the opening 21, the axis of the upper rod 42 and the axis of the annular piece 5 are all on the same vertical axis and are arranged coaxially. When the upper rod 42 rises or falls, the tension on the annular piece 5 in the circumferential direction is relatively uniform, and the reaction force of the annular piece 5 on the upper rod 42 is also relatively uniform. Therefore, the upper rod 42 can be more stably installed on the lower rod 41.

[0083] Figure 7 In order to further reduce the impact damage of the upper rod 42 on the mold, the upper rod 42 is wrapped with a flexible layer 43, which is a rubber layer. The flexible layer 43 wraps the circumferential side surface and the top of the upper rod 42.

[0084] In order to avoid the impact of the lower rod 41 on the mold, the lower rod 41 is limited in length. When the lifting rod 4 is extended to the top, the annular sheet 5 is in a tensioned state, and the lower rod 41 is located below the upper surface of the flushing plate 2.

[0085] Reference Figure 3 and Figure 4In order to ensure that the mold can move freely on the flushing plate 2 after the lifting rod 4 is lowered, the overall height of the lifting rod 4 is restricted. When the lifting rod 4 is lowered to the bottom, the upper rod 42 is located below the upper surface of the flushing plate 2. This design is also to ensure that the upper rod 42 is separated from the lower rod 41 after being hit. When the upper rod 42 loses the support of the lower rod 41, the upper rod 42 can naturally hang below the opening 21 under the action of gravity.

[0086] Here’s how it works:

[0087] Step 1: The mold laminating guide roller 83 is placed on the flushing plate 2 with the mold cavity facing upwards;

[0088] Step 2: The employee uses a hooked pull rod to push the mold to the front stopper 92 for positioning. At this time, the ejector pin of the mold is directly opposite the upper rod 42 below.

[0089] Step 3: The upper rod 42 is pushed upward, the ejector pin of the mold extends upward, and the flushing assembly 3 performs mobile spraying and blowing to complete the mold cleaning;

[0090] Step 4: The upper rod 42 descends and retracts;

[0091] In step five, the employee uses the hook of the pull rod to hook the mold along the gap position and pull it out.

[0092] In step four, a safety structure is added. After cleaning, employees often forget to lower the upper rod 42 and directly pull the mold, resulting in a violent rigid collision between the mold and the upper rod 42, which will damage the mold and the lifting rod 4; in order to improve this impact damage, a magnetic connection is adopted between the upper rod 42 and the lower rod 41. When the mold pulled by the employee collides with the upper rod 42, the upper rod 42 and the lifting rod 4 body are separated, reducing the rigid impact damage between the two and protecting both; and when the employee feels the jam of the pulling mold during pulling, he will realize that a collision has occurred, and the employee will return the mold to the front stop 92 position, and then the lifting rod 4 will fall, and the upper rod 42 will fall back to below the opening 21 under the action of gravity, and the mold can be pulled out again.

[0093] Example 2, a cleaning device for injection molds, which is different from Example 1 in that Figure 8 In order to satisfy the requirement that the flushing plate 2 can adapt to the flushing of molds of more sizes, the front stopper 92 and the side stopper 82 are adjustable;

[0094] The frame 1 is fixed with a No. 1 guide rail, which is a guide rail with a T-shaped cross section. The side stopper 82 slides on the No. 1 guide rail. The frame 1 is provided with a No. 1 screw assembly 81 that drives the side stopper 82 to move toward the opening 21. The No. 1 screw assembly 81 includes a screw and a drive motor. The side stopper 82 is threadedly connected to the screw, so that the side stopper 82 can be driven to move back and forth toward the opening 21 as a whole by controlling the forward and reverse rotation of the motor.

[0095] In the width direction of the flushing plate 2, the front stopper 92 and the side stopper 82 are respectively located on both sides of the opening 21;

[0096] The side stop 82 moves in the width direction of the flushing plate 2. In order to avoid collision between the side stop 82 and the front stop 92, the track length of the No. 1 guide rail is limited so that the side stop 82 moves to a minimum distance of 15 cm from the opening 21; the existence of this minimum distance can also ensure that the pull rod has a position to hook the mold.

[0097] The frame 1 is fixed with a No. 2 guide rail, which is a guide rail with a T-shaped cross section. The front stopper 92 slides on the No. 2 guide rail. The frame 1 is provided with a No. 2 screw assembly 91 for driving the side stopper 82 to move toward the opening 21. The No. 2 screw assembly includes a screw and a drive motor. The front stopper 92 is threadedly connected to the screw, so that the front stopper 92 can be driven to move back and forth toward the opening 21 as a whole by controlling the forward and reverse rotation of the drive motor.

[0098] By adjusting the positions of the side block 82 and the front block 92 relative to the opening 21 , molds of various sizes can be adapted for ejector pin cleaning.

[0099] The bottoms of the side stopper 82 and the front stopper 92 are higher than the ball 22 .

[0100] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cleaning device for an injection mold, characterized in that: include, A frame (1), a flushing plate (2) provided on the frame (1) for the mold to slide into; A flushing assembly (3) is installed above the frame (1) and slides along the XY axis of the horizontal plane; A lifting rod (4) is installed below the frame (1) for ejecting the ejector pin of the mold. The lifting rod (4) includes a lower rod portion (41) and an upper rod portion (42). The upper rod portion (42) and the lower rod portion (41) are magnetically connected. The flushing plate (2) is provided with an opening (21) for the upper rod portion (42) to move in and out. The length of the upper rod portion (42) is smaller than the diameter of the opening (21). An elastic circular ring sheet (5) is sealed and fixed between the opening (21) and the upper rod portion (42). When the lifting rod (4) descends to the bottom, the upper rod portion (42) is located below the upper surface of the flushing plate (2); When the lifting rod (4) is extended to the top, the annular sheet (5) is in a tensioned state, and the lower rod portion (41) is located below the upper surface of the flushing plate (2); The opening (21), the upper rod (42) and the annular piece (5) are coaxially arranged; The side surface of the upper rod portion (42) is wrapped with a flexible layer (43), and the lifting rod (4) is a power push rod.

2. The cleaning device for injection mold according to claim 1, wherein: A hemispherical positioning hole (62) and a positioning block (61) are provided on the mating surfaces of the upper rod (42) and the lower rod (41). The positioning block (61) and the positioning hole (62) cooperate for positioning. The positioning block (61) is telescopic on the lower rod (41). The lower rod (41) is provided with a spring (44) for holding the positioning block (61) in the extended position.

3. The cleaning device for injection mold according to claim 1, wherein: The frame (1) includes a sliding entrance (71), side blocks (82) and a front block (92); The side block (82) is located on one side of the flushing plate (2), and the side block (82) is provided with a guide roller (83) for the mold side to fit; The front stopper (92) is located at the front end of the flushing plate (2), and the sliding entrance (71) is located at the rear end of the flushing plate (2). The front stopper (92) blocks the mold and positions the top holding position of the mold directly above the upper rod (42); The front stopper (92) and the side stopper (82) are arranged vertically, and a gap is formed between the front stopper (92) and the side stopper (82).

4. The cleaning device for injection mold according to claim 3, wherein: The frame (1) is provided with a first screw assembly (81) for driving the side block (82) to move toward the opening (21), and the minimum distance between the side block (82) and the opening (21) is greater than 10 cm; The frame (1) is provided with a second screw assembly (91) for driving the front stopper (92) to move toward the opening (21).

5. The cleaning device for injection mold according to claim 3, characterized in that: The upper surface of the flushing plate (2) is provided with a plurality of rolling balls (22) for supporting the mold.

6. The cleaning device for injection mold according to claim 5, characterized in that: The upper surface of the flushing plate (2) is provided with a drainage hole (72).

7. The cleaning device for injection mold according to claim 6, characterized in that: The upper surface of the flushing plate (2) is arranged obliquely downward toward the sliding entrance (71), the drainage hole (72) is located at the rear end of the flushing plate (2), and a water receiving box (73) is provided below the flushing plate (2), and the opening of the box (73) is located below the drainage hole (72).

8. The cleaning device for injection mold according to claim 1, characterized in that: A crossbeam (103) is slidably mounted above the frame (1), and a transmission belt (101) in the X-axis direction is provided between the crossbeam (103) and the frame (1). The transmission belt (101) drives the crossbeam (103) to move back and forth along the X-axis direction. The flushing assembly (3) slides on the crossbeam (103), and a second transmission belt (102) in the Y-axis direction is provided between the crossbeam (103) and the flushing assembly (3). The second transmission belt (102) drives the flushing assembly (3) to move back and forth along the Y-axis direction.

9. The cleaning device for injection mold according to claim 8, characterized in that: The flushing assembly (3) comprises a liquid spraying port (31) and an air jet port (32) facing the flushing plate (2).

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