Injection molding machine with injection molding head convenient to replace

Abstract

The utility model belongs to the technical field of injection molding machines, and particularly relates to an injection molding machine with an injection molding head convenient to replace. Comprising a pipe body and an injection molding nozzle, the injection molding nozzle is connected with the pipe body through a movable connecting assembly, and the movable connecting assembly comprises a supporting sleeve arranged on the injection molding nozzle; the connecting plates are arranged on the left and right sides of the supporting sleeve; the lug plate is arranged on the connecting plate; the sliding rod is arranged on the lug plate in a sliding manner; the pull block is arranged at the outer end of the sliding rod; the round sleeve is arranged at one end of the pipe body close to the injection nozzle; the fixing blocks are arranged on the left and right sides of the round sleeve; the limiting cylinder is arranged on the fixing block and is connected with the sliding rod in a clamping manner; the elastic piece is arranged between the lug plate and the pull block, and the elastic piece provides abutting elastic force for the sliding rod. The utility model provides the injection molding machine convenient for replacing the injection molding head, which is used for dismounting and replacing the injection molding nozzle.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding machines, and in particular relates to an injection molding machine which is convenient for replacing an injection molding head. Background Art

[0002] Injection molding machine is also called injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. It is divided into vertical, horizontal and all-electric types. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and make it eject and fill the mold cavity. The injection molding machine is equipped with an injection nozzle.

[0003] The working principle of the injection molding machine is similar to that of a syringe used for injections. It uses the thrust of the screw (or plunger) to inject the plasticized molten state (i.e., viscous flow state) plastic into the closed mold cavity, and obtains the product after solidification. Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - mold filling and cooling - mold opening and part removal. After the plastic part is taken out, the mold is closed again for the next cycle.

[0004] The injection nozzles of traditional injection molding machines do not have the function of easy replacement. When the nozzle is damaged, it is impossible to replace the nozzle specifically, and only the entire melt tube body can be replaced, which is inconvenient to use. When the nozzle is blocked, the machine needs to be stopped for manual cleaning, which affects the normal operation of the injection molding machine. Utility Model Content

[0005] The utility model aims to solve the above-mentioned technical problems and provide an injection molding machine which is convenient for replacing the injection molding nozzle and can disassemble and replace the injection molding nozzle.

[0006] In view of this, the utility model provides an injection molding machine that is convenient for replacing an injection molding head, comprising a tube body and an injection molding nozzle, characterized in that the injection molding nozzle is connected to the tube body through a movable connection component, and the movable connection component comprises:

[0007] A support sleeve is arranged on the injection nozzle;

[0008] A connecting plate is arranged on the left and right sides of the supporting sleeve;

[0009] A lug plate, arranged on the connecting plate;

[0010] A slide bar, slidably arranged on the ear plate;

[0011] A pull block, arranged at the outer end of the slide bar;

[0012] A round sleeve is arranged at one end of the tube body close to the injection nozzle;

[0013] Fixed blocks are arranged on the left and right sides of the circular sleeve;

[0014] The limiting cylinder is arranged on the fixed block and is connected with the sliding rod by clamping;

[0015] The elastic member is arranged between the ear plate and the pull block, and provides a tight elastic force to the slide bar.

[0016] In the present technical scheme, when the injection molding nozzle needs to be replaced, people pull the pull block to drive the slide rod to move outward, the elastic member is stretched, and the slide rod moves outward along the ear plate and breaks contact with the limiting cylinder. At this time, the injection molding nozzle is not fixed on the tube body. People remove the injection molding nozzle and place a new injection molding nozzle on the injection molding end face of the tube body. Then, the pull block is released. Under the resetting action of the elastic member, the slide rod moves inward until it is clamped in the limiting cylinder. The limiting cylinder and the slide rod are clamped with each other. Under the elastic force of the elastic member, the slide rod abuts against the limiting cylinder. In this way, the injection molding nozzle can be disassembled and replaced. The disassembly is convenient and the replacement is easy.

[0017] In the above technical solution, further, the elastic member is a return spring.

[0018] In the present technical solution, a return spring is used as the elastic member, which not only has a good effect, but also has the characteristics of easy installation and low price, thus saving production costs.

[0019] In any of the above technical solutions, further, the injection molding machine includes a mold and an injection assembly for injecting molten raw materials into the mold, and the injection assembly includes:

[0020] The injection port is arranged at the front end of the mold;

[0021] A rotating shaft is rotatably arranged inside the tube body;

[0022] A propeller is arranged on the rotating shaft;

[0023] The first motor is connected to the rotating shaft.

[0024] In any of the above technical solutions, further, a mobile component is included, and the mobile component includes:

[0025] A base, located at the bottom of the mold;

[0026] A frame is arranged at the front side of the base;

[0027] A second motor is arranged on the frame;

[0028] A ball screw is arranged on the output shaft of the second motor;

[0029] A sleeve is arranged on the left and right sides of the front part of the base;

[0030] A guide rod, arranged on the sleeve;

[0031] A movable frame is slidably disposed between the two guide rods, the movable frame is threadedly connected to the ball screw, and the movable frame is connected to the first motor;

[0032] The bracket is arranged at the rear side of the movable frame, and the bracket is connected to the pipe body.

[0033] In any of the above technical solutions, further, a blanking assembly is included, and the blanking assembly includes:

[0034] A feed pipe is arranged at the upper end of the pipe body and is connected with the pipe body;

[0035] A hopper is arranged at the upper end of the feeding pipe;

[0036] The guide plate is arranged on the outside of the hopper, and the guide plate is slidably connected to the base.

[0037] In any of the above technical solutions, further, it also includes at least three heaters, the heaters are connected in series through connecting rods, and the heating tubes are arranged on the outer wall of the tube body.

[0038] In the present technical scheme, when plastic products need to be made, the second motor is started first, and the output shaft of the second motor drives the ball screw to rotate. The ball screw is threadedly connected to the moving frame, so that the moving frame moves backward along the guide rod, and at the same time, the moving frame drives the first motor and the bracket to move backward, and the bracket drives the tube body to move backward, and the tube body drives all components thereon to move backward, and the hopper drives the guide plate to move backward along the base, and the guide plate can play a guiding role, making the movement of the tube body more stable. When the injection nozzle moves backward to contact and cooperate with the injection port, the second motor is turned off, and then an appropriate amount of plastic particles are added to the hopper, and the plastic particles slide from the hopper to the discharge pipe, and then slide from the discharge pipe into the tube body, and then the heater is started. The heater generates heat when it works, and the heat surrounds the tube body and conducts the heat to the tube body. At this time, the first motor is started, and the output shaft of the first motor drives the rotating shaft to rotate, and the rotating shaft drives the propeller The plastic pellets are transported by the rotation of the propeller, and the plastic pellets are melted by the heat generated by the heater. The molten plastic raw material fills the tube body, and the molten plastic raw material is extruded and sprayed into the injection port under the transmission action of the propeller. The plastic raw material flows from the injection port to fill the mold. After the mold is filled with molten raw material, the first motor is turned off, and the heater is turned off, and then the second motor is started. The output shaft of the second motor drives the ball screw to reverse, and the movable frame moves forward along the guide rod. The movable frame drives the first motor and the bracket to move forward, and the bracket drives the tube body to move forward. The tube body drives all components thereon to move forward, and at the same time, the tube body drives the injection nozzle to move forward to separate from the injection port. After the injection nozzle moves forward to a suitable position, the second motor is turned off. In this way, the plastic raw material can be melted and the molten raw material can be injected into the mold, thereby realizing automated production of molds, which is convenient to use.

[0039] In any of the above technical solutions, further, a buffer component is included, and the buffer component includes:

[0040] There are four fixing rods, which are arranged on the left and right sides and the upper and lower sides of the rear part of the base;

[0041] A slide plate is slidably arranged between four fixed rods;

[0042] The mounting plates are arranged on the left and right sides of the mold, and the two mounting plates are connected to the slide plate by bolts;

[0043] The buffer spring is sleeved on the fixing rod and arranged between the slide plate and the base.

[0044] In the present technical solution, when the first motor drives the tube body to move toward the side close to the mold, the injection nozzle contacts and cooperates with the injection port, generating impact and vibration at the speed at which the injection nozzle and the injection port move, causing the mold to drive the mounting plate to slide on the guide rod through the slide, and the buffer spring is slightly compressed. Through the elastic force of the buffer spring, the impact and vibration generated by the moving speed of the injection nozzle will not affect the cooperation with the injection port, thereby preventing the injection nozzle from being worn. When the injection nozzle completes the injection of the molten raw material from the injection port, the injection nozzle moves away from the injection port, and the injection nozzle no longer applies pressure to the injection port. Under the resetting action of the elastic member, the slide moves forward along the guide rod, the slide drives the mounting plate to move forward, and the mounting plate drives the mold to move forward, thereby weakening the impact generated by the movement of the injection nozzle to ensure that the injection nozzle will not be damaged, and allowing the injection nozzle to better cooperate with the injection port.

[0045] The beneficial effects of the utility model are:

[0046] 1. The slide rod is clamped by the limit cylinder, so that the injection nozzle is fixedly installed on the injection end of the tube body, which is convenient for installation and replacement of the injection nozzle, and the injection nozzle can be processed when the injection nozzle is blocked;

[0047] 2. The first motor drives the rotating shaft to drive the propeller to rotate. The propeller rotates to transport the plastic particles. The heat generated by the heater melts the plastic particles. The molten plastic raw material fills the tube body. Under the transmission action of the propeller, the molten plastic raw material is squeezed and sprayed into the injection port. The plastic raw material flows from the injection port to fill the mold, so that the plastic raw material can be melted and injected into the mold;

[0048] 3. The second motor drives the ball screw to rotate forward and reverse, and the moving frame drives the tube body to move toward or away from the mold. The tube body drives all the components thereon to move, and drives the injection nozzle to move toward or away from the injection port. The injection nozzle contacts and cooperates with the injection port to inject molten raw materials into the mold, so that the injection nozzle can be driven to move toward or away from the injection port, which is convenient for injecting raw materials into the mold.

[0049] 4. The injection nozzle contacts and cooperates with the injection port, and impact and vibration are generated at the speed at which the injection nozzle and the injection port move, so that the mold drives the mounting plate to slide on the guide rod through the slide plate, and the buffer spring is slightly compressed. Through the elastic force of the buffer spring, the impact and vibration generated by the moving speed of the injection nozzle will not affect the cooperation with the injection port, thereby preventing the injection nozzle from being worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0051] Figure 2 This is a schematic diagram of the first three-dimensional structure of the movable connection assembly of the utility model;

[0052] Figure 3 This is a schematic diagram of the second three-dimensional structure of the movable connection assembly of the utility model;

[0053] Figure 4 It is a three-dimensional structural schematic diagram of the mobile component of the utility model;

[0054] Figure 5 It is a three-dimensional structural schematic diagram of the buffer component of the utility model;

[0055] Figure 6 It is a cross-sectional view of the injection assembly of the utility model;

[0056] The reference numerals in the figure are: 1. tube body; 2. injection nozzle; 3. movable connection assembly; 31. support sleeve; 32. connecting plate; 33. ear plate; 34. slide rod; 35. pull block; 36. round sleeve; 37. fixed block; 38. limit cylinder; 39. elastic member; 4. mold; 5. injection assembly; 51. injection port; 52. rotating shaft; 53. propeller; 54. first motor; 6. moving assembly; 61. base; 62. frame; 63. second motor; 64. ball screw; 65. sleeve; 66. guide rod; 67. moving frame; 68. bracket; 7. unloading assembly; 71. unloading pipe; 72. hopper; 73. guide plate; 8. heater; 9. buffer assembly; 91. fixed rod; 92. slide plate; 93. mounting plate; 94. buffer spring. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0058] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0059] Embodiment 1:

[0060] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, this embodiment provides an injection molding machine that is easy to replace an injection molding head, including a tube body 1 and an injection molding nozzle 2, characterized in that the injection molding nozzle 2 is connected to the tube body 1 through a movable connection component 3, and the movable connection component 3 includes:

[0061] A support sleeve 31 is provided on the injection nozzle 2;

[0062] The connecting plate 32 is arranged on the left and right sides of the supporting sleeve 31;

[0063] The ear plate 33 is arranged on the connecting plate 32;

[0064] A slide bar 34 is slidably disposed on the ear plate 33;

[0065] A pull block 35 is disposed at the outer end of the slide bar 34;

[0066] The round sleeve 36 is arranged at one end of the tube body 1 close to the injection nozzle 2;

[0067] The fixing blocks 37 are arranged on the left and right sides of the circular sleeve 36;

[0068] The limiting cylinder 38 is disposed on the fixing block 37 and is connected with the sliding rod 34 by clamping;

[0069] The elastic member 39 is disposed between the ear plate 33 and the pull block 35 , and provides a tight elastic force to the slide bar 34 .

[0070] In the present technical scheme, when the injection nozzle 2 needs to be replaced, people pull the pull block 35 to drive the slide rod 34 to move outward, the elastic member 39 is stretched, and the slide rod 34 moves outward along the ear plate 33 and breaks contact with the limiting cylinder 38. At this time, the injection nozzle 2 is not fixed on the tube body 1. People remove the injection nozzle 2 and place a new injection nozzle 2 on the injection molding end face of the tube body 1. Then, the pull block 35 is released. Under the resetting action of the elastic member 39, the slide rod 34 moves inward until it is clamped in the limiting cylinder 38. The limiting cylinder 38 and the slide rod 34 are clamped with each other. Under the elastic force of the elastic member 39, the slide rod 34 abuts against the limiting cylinder 38. In this way, the injection nozzle 2 can be disassembled and replaced, and the disassembly is convenient and the replacement is convenient.

[0071] Embodiment 2:

[0072] This embodiment provides an injection molding machine that is easy to replace the injection head. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0073] like Figure 2 and Figure 3 As shown, in this embodiment, the elastic member 39 is optimized to be a return spring.

[0074] In the present technical solution, a return spring is used as the elastic member 39, which not only has a good effect, but also has the characteristics of easy installation and low price, thus saving production costs.

[0075] like Figure 1 , Figure 2 and Figure 6 As shown, in this embodiment, the injection molding machine is optimized to include a mold 4 and an injection assembly 5 for injecting molten raw materials into the mold 4, and the injection assembly 5 includes:

[0076] An injection port 51 is provided at the front end of the mold 4;

[0077] The rotating shaft 52 is rotatably disposed inside the tube body 1;

[0078] A propeller 53 is disposed on the rotating shaft 52;

[0079] The first motor 54 is connected to the rotating shaft 52 .

[0080] like Figure 1 and Figure 4 As shown, in this embodiment, the optimization further includes a moving component 6, and the moving component 6 includes:

[0081] A base 61 is located at the bottom of the mold 4;

[0082] The frame 62 is arranged at the front side of the base 61;

[0083] A second motor 63 is disposed on the frame 62;

[0084] The ball screw 64 is arranged on the output shaft of the second motor 63;

[0085] The sleeve 65 is arranged on the left and right sides of the front part of the base 61;

[0086] A guide rod 66 is provided on the sleeve 65;

[0087] The movable frame 67 is slidably disposed between the two guide rods 66, the movable frame 67 is threadedly connected to the ball screw 64, and the movable frame 67 is connected to the first motor 54;

[0088] The bracket 68 is disposed at the rear side of the movable bracket 67 , and the bracket 68 is connected to the tube body 1 .

[0089] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, in this embodiment, the optimization further includes a blanking assembly 7, and the blanking assembly 7 includes:

[0090] A feed pipe 71 is disposed at the upper end of the pipe body 1 and communicated with the pipe body 1;

[0091] A hopper 72 is provided at the upper end of the feeding pipe 71;

[0092] The guide plate 73 is disposed outside the hopper 72 , and the guide plate 73 is slidably connected to the base 61 .

[0093] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, it is optimized and further includes at least three heaters 8, the heaters 8 are connected in series through connecting rods, and the heating tubes are arranged on the outer wall of the tube body 1.

[0094] In the present technical solution, when a plastic product needs to be made, the second motor 63 is first started, and the output shaft of the second motor 63 drives the ball screw 64 to rotate, and the ball screw 64 is threadedly connected to the movable frame 67, so that the movable frame 67 moves toward the rear side along the guide rod 66, and at the same time, the movable frame 67 drives the first motor 54 and the bracket 68 to move toward the rear side, and the bracket 68 drives the tube body 1 to move toward the rear side, and the tube body 1 drives all the components thereon to move toward the rear side, and the hopper 72 drives the guide plate 73 to move toward the rear side along the base 61, and the guide plate 73 can The second motor 63 is turned off, and then a proper amount of plastic particles are added into the hopper 72. The plastic particles slide from the hopper 72 into the feed pipe 71, and then slide from the feed pipe 71 into the tube body 1. Then, the heater 8 is started, and the heater 8 generates heat. The heat surrounds the tube body 1 and conducts the heat to the tube body 1. At this time, the first motor 54 is started, and the output shaft of the first motor 54 drives the rotating shaft 52 to rotate. 52 drives the propeller 53 to rotate, and the propeller 53 rotates to transport the plastic particles. The heat generated by the heater 8 melts the plastic particles. The molten plastic raw material fills the tube body 1. Under the transmission action of the propeller 53, the molten plastic raw material is squeezed and sprayed into the injection port 51. The plastic raw material flows from the injection port 51 to fill the mold 4. After the mold 4 is filled with the molten raw material, the first motor 54 is turned off, and the heater 8 is turned off. Then the second motor 63 is started, and the output shaft of the second motor 63 drives the ball screw 64 to reverse, and the moving frame 67 moves forward along the guide rod 66. The moving frame 67 drives the first motor 54 and the bracket 68 to move forward, and the bracket 68 drives the tube body 1 to move forward. The tube body 1 drives all components thereon to move forward. At the same time, the tube body 1 drives the injection nozzle 2 to move forward to separate from the injection port 51. After the injection nozzle 2 moves forward to a suitable position, the second motor 63 is turned off. In this way, the plastic raw material can be melted and the molten raw material can be injected into the mold 4, thereby realizing the automated production of the mold 4, which is convenient to use.

[0095] like Figure 1 and Figure 5 As shown, in this embodiment, the optimization further includes a buffer component 9, and the buffer component 9 includes:

[0096] There are four fixing rods 91, which are arranged on the left and right sides and the upper and lower sides of the rear part of the base 61;

[0097] A slide plate 92 is slidably disposed between the four fixing rods 91;

[0098] The mounting plates 93 are arranged on the left and right sides of the mold 4, and the two mounting plates 93 are connected to the slide plate 92 by bolt connection;

[0099] The buffer spring 94 is sleeved on the fixing rod 91 and disposed between the slide plate 92 and the base 61 .

[0100] In the present technical solution, when the first motor 54 drives the tube body 1 to move toward the side close to the mold 4, the injection nozzle 2 contacts and cooperates with the injection port 51, and generates impact and vibration at the speed at which the injection nozzle 2 and the injection port 51 move, so that the mold 4 drives the mounting plate 93 to slide on the guide rod 66 through the slide plate 92, and the buffer spring 94 is slightly compressed. Through the elastic force of the buffer spring 94, the impact and vibration generated by the moving speed of the injection nozzle 2 will not affect the cooperation with the injection port 51, thereby preventing the injection nozzle from being worn. When the injection nozzle 2 completes the injection of the molten raw material from the injection port 51, the injection nozzle 2 moves away from the injection port 51, and the injection nozzle no longer applies pressure to the injection port 51. Under the resetting action of the elastic member 39, the slide plate 92 moves forward along the guide rod 66, the slide plate 92 drives the mounting plate 93 to move forward, and the mounting plate 93 drives the mold 4 to move forward, so as to weaken the impact generated by the movement of the injection nozzle, to ensure that the injection nozzle 2 will not be damaged, so that the injection nozzle and the injection port 51 can be better matched.

[0101] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An injection molding machine that is easy to replace an injection molding head, comprising a tube body (1) and an injection molding nozzle (2), characterized in that: The injection nozzle (2) is connected to the tube body (1) via a movable connection component (3), and the movable connection component (3) comprises: A support sleeve (31) is arranged on the injection nozzle (2); A connecting plate (32) is arranged on the left and right sides of the supporting sleeve (31); An ear plate (33) is arranged on the connecting plate (32); A slide bar (34) slidably disposed on the ear plate (33); A pull block (35) is arranged at the outer end of the slide rod (34); A circular sleeve (36) is arranged at one end of the tube body (1) close to the injection nozzle (2); A fixing block (37) is arranged on the left and right sides of the circular sleeve (36); A limiting cylinder (38) is arranged on the fixing block (37) and is connected to the sliding rod (34) by clamping; An elastic member (39) is arranged between the ear plate (33) and the pull block (35), and the elastic member (39) provides a tight elastic force to the slide rod (34).

2. The injection molding machine for facilitating replacement of injection molding heads according to claim 1, characterized in that: The elastic member (39) is a return spring.

3. The injection molding machine for facilitating replacement of injection molding heads according to claim 1, characterized in that: The injection molding machine comprises a mold (4) and an injection assembly (5) for injecting molten raw materials into the mold (4), wherein the injection assembly (5) comprises: An injection port (51) is arranged at the front end of the mold (4); A rotating shaft (52) is rotatably arranged inside the tube body (1); A propeller (53) is arranged on the rotating shaft (52); A first motor (54) is connected to the rotating shaft (52).

4. The injection molding machine for facilitating replacement of injection molding heads according to claim 3, characterized in that: The invention also comprises a moving component (6), wherein the moving component (6) comprises: A base (61) located at the bottom of the mold (4); A frame (62) is arranged on the front side of the base (61); A second motor (63) is arranged on the frame (62); A ball screw (64) is arranged on the output shaft of the second motor (63); A sleeve (65) is arranged on the left and right sides of the front part of the base (61); A guide rod (66) is arranged on the sleeve (65); A movable frame (67) is slidably disposed between the two guide rods (66), the movable frame (67) is threadedly connected to the ball screw (64), and the movable frame (67) is connected to the first motor (54); The bracket (68) is arranged on the rear side of the movable bracket (67), and the bracket (68) is connected to the tube body (1).

5. The injection molding machine for facilitating replacement of injection molding heads according to claim 4, characterized in that: It also includes a blanking assembly (7), wherein the blanking assembly (7) includes: A feed pipe (71) is arranged at the upper end of the pipe body (1) and is in communication with the pipe body (1); A hopper (72) is arranged at the upper end of the feeding pipe (71); A guide plate (73) is arranged outside the hopper (72), and the guide plate (73) is slidably connected to the base (61).

6. The injection molding machine for facilitating replacement of injection molding heads according to claim 1, characterized in that: It also comprises at least three heaters (8), wherein the heaters (8) are connected in series via connecting rods, and the heaters (8) are arranged on the outer wall of the tube body (1).

7. The injection molding machine for facilitating replacement of injection molding heads according to claim 4, characterized in that: The invention also comprises a buffer component (9), wherein the buffer component (9) comprises: There are four fixing rods (91) disposed on the left and right sides and the upper and lower sides of the rear part of the base (61); A slide plate (92) is slidably disposed between the four fixing rods (91); Mounting plates (93) are arranged on the left and right sides of the mold (4), and the two mounting plates (93) are connected to the slide plate (92) by bolt connection; A buffer spring (94) is sleeved on the fixing rod (91) and is arranged between the slide plate (92) and the base (61).

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