An injection molding machine

Abstract

The application provides an injection molding machine, and belongs to the technical field of injection molding machines.The injection molding machine comprises a machine body, a driving device, a mold plate set and a mold set, the mold plate set and the mold set are both installed on the machine body, the driving device can drive the mold plate set to move, so that the mold set is opened and closed, the mold set comprises a fixed mold and a movable mold, the opposite sides of the fixed mold and the movable mold are both provided with cavities, the two cavities can constitute a mold cavity, the fixed mold and the movable mold are respectively provided with a fixed clamping plate and a movable clamping plate, and the fixed clamping plate is located on the movable mold; during demolding, the flash is clamped between the fixed clamping plate and the movable clamping plate through cooperation of the fixed clamping plate and the movable clamping plate, then the relative movement of the workpiece and the flash is generated through a pushing structure, so that the flash can be separated from the workpiece, and the purpose of removing the flash is achieved; since the fixed clamping plate and the movable clamping plate can also clamp the flash at the dead angle of the workpiece, the effect of removing the flash of the device is better.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of injection molding machines, and particularly relates to an injection molding machine. BACKGROUND

[0002] The plastic corner of a door and window refers to a plastic part installed at a frame or corner of a door and window, and is mainly divided into two categories of structural corner code and protective corner, which respectively bear different functions and application scenarios. The production of the door and window corner is usually realized through injection molding.

[0003] The mold cavity formed by the moving mold and the fixed mold of the injection molding machine in the mold closing process is used for the injection molding material to enter the mold cavity to form the required injection molding product. Since the injection molding part is assembled by multiple components, certain errors are inevitably generated. These errors may cause the flatness deviation between the moving mold and the fixed mold. The parallelism deviation causes the mold to be unable to fit or be seriously unevenly stressed to generate a flash, and the wall thickness is uneven to be unable to perform the injection molding production.

[0004] In the Chinese patent with the authorization announcement number CN113997513A, an injection molding mold with a flash removing function is disclosed, which comprises an upper mold, a lower mold, a mold cavity and an injection hole. The lower mold is provided with a driving mechanism, the mold body is provided with a trimming device, the trimming device comprises a trimming mechanism for trimming the flash of the injection molding part, a clamping mechanism for fixing the injection molding part and a jacking mechanism for ejecting the injection molding part, the trimming mechanism is slidingly arranged on the upper mold, the trimming mechanism and the lower mold are connected with a connecting rod, the clamping mechanism is connected with the driving mechanism, and the jacking mechanism is located in the lower mold. When the mold body is in the mold closing state, the end of the trimming mechanism close to the lower mold is located in the walking hole. When the mold body is in the mold opening state, the driving mechanism drives the lower mold to move away from the upper mold, and drives the trimming mechanism to extend out of the walking hole to trim the flash of the injection molding part.

[0005] The above technical scheme moves the trimming cutter along the edge of the workpiece to remove the flash at the edge of the workpiece. However, due to the limitation of the shape of the cutter head (the cutter head is rectangular), when the workpiece has an included angle shape, the cutter head is difficult to enter the inside of the included angle. Even if the cutter head can enter the inside of the included angle, since the cutter head has a certain width, when one side of the cutter head moves to the other side, a dead angle is still easy to appear at the included angle, so that the flash cleaning is not complete. SUMMARY

[0006] The purpose of the present application is to provide an injection molding machine, which aims to solve the problem that the injection molding mold with a flash removing function in the prior art cannot clean the dead angle when removing the flash.

[0007] In order to achieve the above object, the present application provides the following technical scheme: an injection molding machine, comprising: a machine body, a driving device, a mold plate group and a mold group, the mold plate group and the mold group are both installed on the machine body, the driving device can drive the mold plate group to move, so that the mold group is opened and closed, the mold group comprises a fixed mold and a movable mold, the opposite sides of the fixed mold and the movable mold are both provided with a cavity, the two cavities can form a mold cavity, the fixed mold and the movable mold are respectively provided with a fixed clamping plate and a movable clamping plate, the fixed clamping plate is located on the movable mold, and the fixed clamping plate and the side surface of the movable mold are in the same plane, the movable clamping plate is slidably arranged on the fixed mold, and when the movable clamping plate slides to the limit position close to the fixed mold, the movable clamping plate and the side surface of the fixed mold are in the same plane, the fixed mold is provided with a first elastic element for pushing the movable clamping plate close to the fixed clamping plate, the fixed clamping plate and the movable clamping plate are both provided with an injection slot, the inner side wall of the cavity and the inner side wall of the injection slot are located on the same plane, and the movable mold is provided with a pushing structure, which can push the workpiece to move away from the movable mold when demolding.

[0008] Further technical scheme of the present application is that the fixed clamping plate and the movable clamping plate are both provided with an opening at the edge of the injection slot, so that the two openings form a cavity, and the cavity is provided with an opening close to the injection slot, and the opening and the inside of the injection slot are in communication.

[0009] Further technical scheme of the present application is that the mold plate group comprises a fixed mold plate and a movable mold plate, the fixed mold plate is arranged on the machine body, the machine body is provided with a glue injection device, the glue injection end of the glue injection device is connected with the fixed mold plate, the machine body is provided with a slide column arranged horizontally, the movable mold plate is arranged on the slide column and can slide along the length direction of the slide column, and the machine body is provided with a driving device for driving the movable mold plate to move close to and away from the fixed mold plate.

[0010] Further technical scheme of the present application is that the pushing structure comprises a top rod penetrating through the movable mold, one end of the top rod extends to the inside of the mold cavity, and the other end is provided with a third limiting lug, a second elastic element for driving the top rod to move away from the mold cavity is arranged on the top rod, one end of the second elastic element abuts against the movable mold, and the other end abuts against the third limiting lug.

[0011] Further technical scheme of the present application is that the movable mold plate is provided with a mounting plate and a sliding column, the mounting plate slides on the sliding column, the middle part of the mounting plate is provided with a avoiding slot, the movable mold is arranged on the mounting plate, one end of the top rod located at the third limiting lug abuts against the movable mold plate through the avoiding slot, and the telescopic end of the driving device penetrates through the movable mold plate and is connected with the avoiding slot and the movable mold.

[0012] Further technical scheme of the present application is that one end of the top rod close to the mold cavity is provided with a second limiting lug, and the outer surface of the second limiting lug is flush with the inner side wall of the mold cavity.

[0013] Further technical solutions of the present application are that the slits are arrayed with multiple partitions on the openings, and the opposing partitions on the movable clamp plate and the fixed clamp plate abut each other when the mold is closed, so that the continuous openings form intermittent openings.

[0014] Further technical solutions of the present application are that the slits are arrayed with multiple partitions on the openings, and the opposing partitions on the movable clamp plate and the fixed clamp plate abut each other when the mold is closed, so that the continuous openings form intermittent openings.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. When demolding, the flash is clamped between the fixed clamp plate and the movable clamp plate through the cooperation of the fixed clamp plate and the movable clamp plate, and then the relative movement between the workpiece and the flash is pushed by the pushing structure, so that the flash can be separated from the workpiece, achieving the purpose of removing the flash. Since the fixed clamp plate and the movable clamp plate can also clamp the flash at the dead angle of the workpiece, the effect of removing the flash by the device is better.

[0017] 2. By setting the slits, the flash can be connected with the material at the slit, preventing the flash from being pulled out from between the movable clamp plate and the fixed clamp plate, so that the flash is separated from between the movable clamp plate and the fixed clamp plate, causing the problem of failure to remove the flash. In addition, the partitions are arranged at the slits to reduce the volume of the internal space of the cavity, thereby reducing the amount of waste and the cost of materials.

[0018] 3. Multiple protrusions are arranged at the openings of the slits, so that the continuous openings form intermittent openings, facilitating the separation of the workpiece and the flash by the pushing structure. DETAILED DESCRIPTION

[0019] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, which together with the embodiments of the present application, serve to explain the present application, and do not constitute a limitation of the present application. In the drawings:

[0020] Figure 1 is a structural schematic view of a specific embodiment in the present application;

[0021] Figure 2 is a sectional view of the template group and the mold group in a specific embodiment in the present application;

[0022] Figure 3 is a sectional view of the mold group in a specific embodiment in the present application;

[0023] Figure 4 is a structural schematic view of the fixed clamp plate and the movable clamp plate in a specific embodiment in the present application;

[0024] Figure 5 is Figure 3 is an enlarged schematic view of the structure at A in the specific embodiment;

[0025] Figure 6 For the specific embodiment in the present application, the template and the moving template structure schematic diagram is shown in the figure.

[0026] Figure 7 For the specific embodiment in the present application, the position structure schematic diagram of the gap is shown in the figure.

[0027] Figure 8 For the specific embodiment in the present application, the position structure schematic diagram of the partition is shown in the figure.

[0028] In the figure: 1, the machine body; 11, the glue injection device; 12, the sliding column; 2, the template group; 21, the fixed template; 22, the moving template; 25, the groove; 26, the mounting plate; 261, the avoidance groove; 27, the sliding column; 3, the mold group; 31, the fixed mold; 32, the moving mold; 33, the cavity; 34, the mold cavity; 35, the fixed clamp plate; 36, the moving clamp plate; 361, the limiting column; 362, the first limiting lug; 37, the first elastic member; 38, the injection slot; 4, the clamping structure; 5, the pushing structure; 51, the top rod; 52, the second elastic member; 53, the second limiting lug; 54, the third limiting lug; 6, the flow channel; 61, the injection port; 62, the butt joint; 7, the driving device; 8, the gap; 81, the cavity; 82, the opening; 83, the partition; 84, the protrusion. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Please refer to Figures 1-8 The present application provides the following technical solutions: an injection molding machine, comprising a machine body 1, a template group 2, a mold group 3, a clamping structure 4 and a pushing structure 5.

[0031] The machine body 1 is a horizontal injection molding machine, the template group 2 is arranged on the machine body 1, the mold group 3 is installed on the template group 2, the template group 2 can be used to drive the mold group 3 to open and close the mold, the clamping structure 4 is installed on the mold group 3 to clamp the flash on the workpiece when opening the mold, and the pushing structure 5 is also installed on the mold group 3, which pushes the workpiece through the pushing structure 5 when the clamping structure 4 clamps the flash on the workpiece when opening the mold, so that the flash can be separated from the workpiece.

[0032] Please refer to Figure 1 and Figure 2, the die set 2 is composed of a fixed die plate 21 and a movable die plate 22, the fixed die plate 21 is fixed on the machine body 1, the machine body 1 is provided with a glue injection device 11, the glue injection end of the glue injection device 11 is connected with the fixed die plate 21, the machine body 1 is provided with a slide column 12 arranged horizontally, the movable die plate 22 is arranged on the slide column 12 and can slide along the length direction of the slide column 12, the machine body 1 is further provided with a driving device 7 at the end away from the glue injection device 11, the driving device 7 drives the movable die plate 22 to move close to or away from the fixed die plate 21, when the movable die plate 22 moves close to the fixed die plate 21, the die set 3 can be clamped.

[0033] Please refer to Figure 2 and Figure 3 , the die set 3 is composed of a fixed die 31 and a movable die 32, the fixed die 31 is installed on the fixed die plate 21 through screws, the movable die 32 is installed on the movable die plate 22 through screws, when the movable die plate 22 moves, the movable die 32 can be driven to move and move close to the fixed die 31, so as to achieve the purpose of clamping.

[0034] Please refer to Figures 2-4 , the fixed die 31 and the movable die 32 are provided with cavities 33 on the opposite sides, when the fixed die 31 and the movable die 32 are clamped, the two cavities 33 can form a mold cavity 34, the mold cavity 34 is used for injection molding of workpieces, recesses 25 are arranged on the opposite sides of the fixed die 31 and the movable die 32, the recesses 25 completely cover the two cavities 33, fixed clamping plates 35 and movable clamping plates 36 are respectively arranged in the recesses 25, the fixed clamping plate 35 is fixed in the recess 25 on the movable die 32 through screws, and the fixed clamping plate 35 is in the same plane with the surface of the movable die 32 close to the fixed die 31, the movable clamping plate 36 is installed in the recess 25 on the fixed die 31 and can slide in the direction of moving the movable die 32 in the recess 25, when the movable clamping plate 36 is completely located in the recess 25, the movable clamping plate 36 is in the same plane with the surface of the fixed die 31 close to the movable die 32, limit columns 361 are arranged on the side of the movable clamping plate 36 away from the fixed clamping plate 35, the limit columns 361 penetrate to the side of the fixed die 31 away from the movable die 32, and first limit ears 362 are arranged on the ends of the limit columns 361 away from the movable clamping plate 36, when the limit columns 361 slide in the fixed die 31, the first limit ears 362 can abut against one side of the fixed die 31, so as to limit the sliding distance of the movable clamping plate 36 and also avoid the movable clamping plate 36 from falling off the fixed die 31;

[0035] The first elastic member 37 is arranged on the side of the movable clamp plate 36 away from the fixed clamp plate 35, and is a compression spring, one end of which is in abutment with the movable clamp plate 36, and the other end of which is in abutment with the fixed die 31; in the case that the first elastic member 37 is not forced, the first elastic member 37 is in a state of pushing the movable clamp plate 36 out of the recess 25; when the mold is closed, the movable die 32 approaches the fixed die 31, and the fixed clamp plate 35 is in abutment with the movable clamp plate 36, thereby pushing the movable clamp plate 36 into the inside of the recess 25; at this time, the first elastic member 37 is in a compressed state.

[0036] Please refer to Figure 4 and Figure 7 , the fixed clamp plate 35 and the movable clamp plate 36 are both provided with injection molding grooves 38, the injection molding grooves 38 penetrate through the fixed clamp plate 35 and the movable clamp plate 36, and the shape and size of the injection molding grooves 38 are the same as those of the cavity 33, so that the inner side wall of the cavity 33 and the inner side wall of the injection molding groove 38 are located on the same plane, thus making the two cavities 33 and the two injection molding grooves 38 form a complete mold cavity 34, so that the workpiece can be normally injection molded.

[0037] The fixed clamp plate 35 and the movable clamp plate 36 are both provided with flow channels 6 on the side close to each other, the flow channels 6 are in communication with the inside of the injection molding grooves 38, and when the mold is closed, the two flow channels 6 form an injection molding channel, which can be used for injection molding work to the inside of the mold cavity 34; there is an injection molding port 61 on the middle of the fixed die 31, and the flow channel 6 on the movable clamp plate 36 is provided with a butt joint port 62, which is in abutment with the injection molding port 61 when the mold is closed, so that the injection molding port 61 is in communication with the injection molding channel, thereby enabling the molten material to be injected into the inside of the mold cavity 34.

[0038] Please refer to Figures 2-6 , the push structure 5 is arranged on the movable die 32, and is used for generating relative displacement between the formed workpiece and the flash, so as to achieve the purpose of removing the flash; the push structure 5 comprises a push rod 51 penetrating through the movable die 32, one end of the push rod 51 penetrates into the inside of the mold cavity 34, the other end of the push rod 51 away from the mold cavity 34 is provided with a second elastic member 52, the second elastic member 52 is used for driving the push rod 51 to move away from the mold cavity 34, the end of the push rod 51 close to the mold cavity 34 is provided with a second limiting lug 53, and a containing groove is arranged on the inner wall of the mold cavity 34, the second limiting lug 53 is located in the inside of the containing groove, when the second limiting lug 53 is located in the inside of the containing groove, the outer surface of the second limiting lug 53 is flush with the inner side wall of the mold cavity 34, so that the second limiting lug 53 can limit the movement of the push rod 51, avoiding the push rod 51 from falling off the movable die 32, and at the same time, the arrangement of the second limiting lug 53 increases the contact area with the workpiece, thereby avoiding the push rod 51 from pressing the workpiece, and ensuring the quality of the product.

[0039] The second elastic member 52 is a compression spring, the top rod 51 is provided with a third limiting lug 54 away from one end of the second limiting lug 53, one end of the second elastic member 52 is in abutment with the movable die 32, and the other end is in abutment with the third limiting lug 54, so that the second elastic member 52 is not forced, the second limiting lug 53 is always kept inside the accommodating groove, and the surface on one side of the second limiting lug 53 is always flush with the inner side wall of the mold cavity 34, thereby avoiding affecting the surface quality of the product.

[0040] Please refer to Figure 2 and Figure 6 The movable die plate 22 is provided with a mounting plate 26 and a sliding column 27, the sliding column 27 is horizontally arranged and extends to the direction of the movable die 32, the mounting plate 26 is slidingly mounted on the sliding column 27, a fourth limiting lug is arranged on the sliding column 27 for limiting the sliding of the mounting plate 26, avoiding the mounting plate 26 from falling off the sliding column 27, the middle part of the mounting plate 26 is provided with an avoiding slot 261, the movable die 32 is mounted on the mounting plate 26, one end of the top rod 51 in the third limiting lug 54 is in abutment with the movable die plate 22 through the avoiding slot 261, the telescopic end of the driving device 7 penetrates the movable die plate 22 and is connected with the avoiding slot 261 and the movable die 32, and at the same time, in order to avoid the driving device 7 directly driving the movable die plate 22 to move, the inner wall of the penetrating hole on the movable die plate 22 does not contact the telescopic end of the driving device 7.

[0041] In use, the driving device 7 drives the mounting plate 26 and the movable die 32 to move towards the fixed die 31, so that the mounting plate 26 is away from the movable die plate 22 by a distance, and under the action of the second elastic member 52, the second limiting lug 53 is located inside the accommodating groove, and the surface of the second limiting lug 53 is always flush with the inner side wall of the mold cavity 34. Then, the fourth limiting lug can drive the movable die plate 22 to move towards the fixed die 31 at the same time, so that the movable die 32 and the fixed die 31 are combined. During the combining process, the fixed clamp plate 35 first contacts the movable clamp plate 36 and drives the movable clamp plate 36 to move, so that the movable clamp plate 36 enters the recess 25. At this time, the movable die 32 and the fixed die 31 complete the combining operation. Then, the molten material is injected, and after the material solidifies, the driving device 7 drives the movable die 32 to open, so that the movable die 32 is away from the fixed die 31. During this process, under the action of the first elastic member 37, the movable clamp plate 36 is still in contact with the fixed clamp plate 35, and the flash of the product is usually located between the movable clamp plate 36 and the fixed clamp plate 35, that is, under the action of the first elastic member 37, the movable clamp plate 36 and the fixed clamp plate 35 clamp the flash in the middle. At the same time, the movable die 32 drives the mounting plate 26 to approach the movable die plate 22, so that the third limiting lug 54 on the movable die 32 is in contact with the movable die plate 22, and the ejector pin 51 is driven to move towards the mold cavity 34, so that the formed workpiece can be pushed. Since the flash is fixed by the movable clamp plate 36 and the fixed clamp plate 35, the relative movement between the workpiece and the flash occurs, so that the flash can be separated from the workpiece. Even in the dead angle position, the flash can be effectively cleaned.

[0042] Please refer to Figure 5 and Figure 7 The movable clamp plate 36 and the fixed clamp plate 35 are provided with notches 8 at the edges of the injection slot 38. When the mold is combined, the two notches 8 form a cavity 81, and the two notches 8 have a spacing between the sides close to the injection slot 38, forming an opening 82 on the cavity 81, so that the cavity 81 and the inside of the injection slot 38 are connected through the opening 82. When the workpiece is injection molded, the molten material can enter the inside of the cavity 81 through the opening 82 and be demolded after cooling. During the demolding process, since the flash is combined with the material cooled in the cavity 81, when the ejector structure 5 removes the flash of the workpiece, the flash and the material cooled in the cavity 81 become one, that is, the shape of the flash is changed, so that the flash can be clamped between the movable clamp plate 36 and the fixed clamp plate 35, thereby preventing the flash from being separated from the movable clamp plate 36 and the fixed clamp plate 35, and the problem of failure to remove the flash.

[0043] Please refer to Figure 8A plurality of partitions 83 are arranged at the openings 8 of the movable clamp plate 36 and the fixed clamp plate 35, the partitions 83 are arranged transversely inside the openings 8, and the partitions 83 are lower than the surface of one side of the movable clamp plate 36 and the fixed clamp plate 35, so that when the mold is closed, there is still a small gap between two opposite partitions 83, and the arrangement of the partitions 83 can reduce the volume of the space inside the cavity 81, thereby reducing the amount of waste and the cost of materials.

[0044] A plurality of protrusions 84 are arranged at the openings 82 of the openings 8 of the movable clamp plate 36 and the fixed clamp plate 35, when the mold is closed, the opposite protrusions 84 of the movable clamp plate 36 and the fixed clamp plate 35 abut each other, so that the continuous openings 82 form intermittent openings 82, and the connection between the workpiece and the material inside the cavity 81 is intermittent, thereby facilitating the separation of the workpiece and the flash by the pushing structure 5.

Claims

1. An injection molding machine comprising: The body (1), the driving device (7), the template group (2) and the mold group (3), the template group (2) and the mold group (3) are installed on the body (1), the driving device (7) can drive the template group (2) to move, so that the mold group (3) is opened and closed, characterized in that the mold group (3) comprises a fixed mold (31) and a movable mold (32), the opposite sides of the fixed mold (31) and the movable mold (32) are provided with cavities (33), the two cavities (33) can form a mold cavity (34), the fixed mold (31) and the movable mold (32) are respectively provided with fixed clamping plates (35) and movable clamping plates (36), the fixed clamping plate (35) is located on the movable mold (32), and the fixed clamping plate (35) and the movable mold (32) are located on the same plane, the movable clamping plate (36) is slidably arranged on the fixed mold (31), and when the movable clamping plate (36) is slid to the limit position close to the fixed mold (31), the movable clamping plate (36) and the fixed mold (31) are located on the same plane, the fixed mold (31) is provided with a first elastic element (37) for pushing the movable clamping plate (36) close to the fixed clamping plate (35), the fixed clamping plate (35) and the movable clamping plate (36) are provided with injection grooves (38), the inner side wall of the cavity (33) and the inner side wall of the injection groove (38) are located on the same plane, and the movable mold (32) is provided with a pushing structure (5), which can push the workpiece to move away from the movable mold (32) when demolding.

2. An injection molding machine as claimed in claim 1, characterized in that: The movable clamping plate (36) and the fixed clamping plate (35) are provided with notches (8) at the edges of the injection grooves (38), so that the two notches (8) form a cavity (81), and the cavity (81) is provided with an opening (82) close to the injection groove (38), and the opening (82) and the inside of the injection groove (38) are in communication.

3. An injection molding machine as claimed in claim 1, characterized in that: The template group (2) comprises a fixed template (21) and a movable template (22), the fixed template (21) is arranged on the body (1), the body (1) is provided with a glue injection device (11), the glue injection end of the glue injection device (11) is connected with the fixed template (21), the body (1) is provided with a slide column (12) arranged horizontally, the movable template (22) is arranged on the slide column (12) and can slide along the length direction of the slide column (12), and the body (1) is provided with a driving device (7) for driving the movable template (22) to move close to and away from the fixed template (21).

4. An injection molding machine as claimed in claim 3, characterized in that: The pushing structure (5) comprises a top rod (51) penetrating through the movable mold (32), one end of the top rod (51) extends into the inside of the mold cavity (34), and the other end is provided with a third limiting lug (54); a second elastic element (52) is arranged on the top rod (51) and drives the top rod (51) to move away from the mold cavity (34), one end of the second elastic element (52) abuts against the movable mold (32), and the other end abuts against the third limiting lug (54).

5. An injection molding machine as claimed in claim 4, characterized in that: The movable die plate (22) is provided with a mounting plate (26) and a sliding column (27), the mounting plate (26) slides on the sliding column (27), the middle part of the mounting plate (26) is provided with an avoiding slot (261), a movable die (32) is mounted on the mounting plate (26), one end of a top rod (51) located at a third limiting lug (54) abuts against the movable die plate (22) through the avoiding slot (261), and the extension end of a driving device (7) penetrates the movable die plate (22) and is connected with the avoiding slot (261) and the movable die (32).

6. An injection molding machine as claimed in claim 4, characterized in that: The top rod (51) is provided with a second limiting lug (53) at one end close to the mold cavity (34), and the outer surface of the second limiting lug (53) is flush with the inner side wall of the mold cavity (34).

7. An injection molding machine as claimed in claim 2, characterized in that: Multiple partition strips (83) are arranged at the slits (8), the partition strips (83) are lower than the surface of one side of the movable clamp plate (36) and the fixed clamp plate (35), and there is a gap between two opposite partition strips (83) when the mold is closed.

8. An injection molding machine as claimed in claim 7, characterized in that: Multiple protrusions (84) are arranged at the openings (82) of the slits (8), and the opposite protrusions (84) on the movable clamp plate (36) and the fixed clamp plate (35) abut against each other when the mold is closed, so that the continuous openings (82) form intermittent openings (82).

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