An injection molding machine and its working method

Abstract

An injection molding machine and its working method, comprising a fixed template, a screw injection device provided on the fixed template, a movable template provided below the fixed template, a first driving mechanism for driving the movable template, a mold provided on the movable template, a mold moving device installed on the movable template, and a pile holding device provided below the movable template; the pile holding device includes a central shaft connected to the movable template, a holding mechanism for tightly holding the central shaft, and a support mechanism for supporting the holding mechanism; the holding mechanism includes a first holding block, a second holding block oppositely arranged with the first holding block, and a holding oil cylinder connected to the first holding block; the support mechanism includes an annular hydraulic cylinder, and the annular hydraulic cylinder includes a cylinder body with an annular piston cavity, a cylinder head cooperating with the cylinder body, and an annular piston provided in the annular piston cavity. Since the first holding block and the second holding block of the holding mechanism are sleeved on the central shaft itself, they can quickly hold the central shaft tightly after starting, thereby performing the action of quickly locking the mold.

Description

Technical Field

[0001] The present invention relates to an injection molding machine, in particular to an injection molding machine and its working method. Background Art

[0002] The mold clamping mechanism of an injection molding machine needs to move the mold at high speed to shorten the molding cycle, and at the same time, it also needs a large force to clamp the mold. To meet these requirements, the structure of a traditional injection molding machine is generally as follows, including: a structural frame composed of a fixed template, a moving template, a rear template, and guide columns, and a power cylinder for transmitting motion and locking force; the guide columns in the structural frame are arranged between the fixed template and the rear template, the moving template is sleeved on the guide columns and can slide along the guide columns, the cylinder block of the power cylinder is fixed on the rear template or the fixed template, and the plunger or piston rod of the power cylinder is connected to the moving template. Through the action of the power cylinder, the moving template is driven to open / close the mold and clamp the mold. The disadvantages of this structure are as follows: First, the structural frame is not reasonably arranged. The cross-sections of the adopted guide columns are all cylindrical, and the friction between the moving template and the guide columns is sliding friction, which increases the movement resistance, and the parts are easily worn. The uneven wear of the four guide columns and the non-adjustable structure further affect the accuracy of the mold closing; the guide columns are connected to the fixed template and the rear template to form a rigid structural frame fixed on the machine base of the injection molding machine. Since the guide columns not only guide but also bear the locking force, the deformation generated after being stressed cannot be compensated, which also affects the accuracy of the model closing; Second, the power cylinder undertakes the dual functions of fast movement and clamping, with both fast actions and slow actions. It is necessary to additionally increase a booster cylinder, and the plunger or piston rod of the booster cylinder also moves together with the moving template when the mold is opened / closed. In this way, the whole system becomes very complicated, which not only increases the difficulty of control, but also increases the number of equipment parts, the volume of the fuel tank, the movement load, resulting in an increase in the overall cost, high energy consumption, and low working efficiency.

[0003] To solve the problems existing in the clamping mechanism of traditional injection molding machines, a fast clamping mechanism appears, such as a precision injection molding machine clamping mechanism with Chinese Patent Publication No. CN103286928B, which includes: a structural frame composed of a fixed template, a movable template, a rear template, and guide columns, a movable template fast-moving mechanism, and a clamping cylinder mechanism; the cross-section of the guide columns of the structural frame is rectangular, and rollers are provided on the upper and lower column surfaces and the inner side surfaces of the guide columns at the four corners of the movable template; the movable template fast-moving mechanism is composed of a motor reduction box, a pair of meshing gears and racks, and a guide wheel, and the clamping cylinder mechanism is composed of four cylinders, a clamping support plate and a transmission mechanism, and the rear template is provided with through holes for the piston rods of the cylinders to pass through. The movable template quickly enters the closed position between the movable template and the fixed template by starting the movable template fast-moving mechanism. Subsequently, the transmission mechanism of the clamping support plate is started, driving the clamping support plate to rotate until the cross-shaped fingers of the clamping support plate completely cover the through holes for the piston rods of the cylinders on the rear template and then stop rotating. Then, the cylinders of the clamping cylinder mechanism are started, and the piston rods of the cylinders extend until the piston rods of the cylinders touch the clamping support plate. Driven by the clamping cylinder, the movable template and the fixed template are completely closed and wait for injection molding. Thus, after the movable mold and the fixed mold are clamped, the rotating support template is used as the support surface of the clamping cylinder, and then the movable mold is pressed against by the pressure of the clamping cylinder to achieve clamping; this kind of clamping mechanism requires high precision. If the telescopic rod of the clamping cylinder does not completely avoid the clamping support plate, the clamping support plate will collide with the telescopic rod of the cylinder after rotation; in addition, to shorten the stroke of the clamping cylinder, when the movable mold is clamped, the clamping cylinder needs to act to extend its telescopic rod. The longer the telescopic rod extends, the greater the energy consumption. Moreover, the elongation of the telescopic rod of the clamping cylinder needs to be closely coordinated with the movement of the clamping support plate to achieve fast clamping, increasing the complexity of the clamping system. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an injection molding machine and its working method, which have fast clamping speed, high clamping reliability, and energy saving.

[0005] To solve the above technical problems, the technical solution of the present invention is: an injection molding machine includes a fixed template, a screw injection device provided on the fixed template, a movable template provided below the fixed template, a first driving mechanism for driving the movable template, and a mold provided on the movable template; it also includes a mold moving device installed on the movable template and a pile holding device provided below the movable template;

[0006] The clamping mechanism includes a first clamping block, a second clamping block disposed opposite to the first clamping block, and a clamping oil cylinder connected to the first clamping block; a first arc surface is provided at the middle position of the surface of the first clamping block opposite to the second clamping block, first guide grooves are provided on both sides of the first arc surface, the outer sides of the first guide grooves extend forward to form a first rack, and the clamping oil cylinder acts on the surface of the first clamping block facing away from the second clamping block; a second arc surface is provided at the middle of the surface of the second clamping block opposite to the first clamping block, the two sides of the second arc surface extend forward to form first guide blocks that cooperate with the first guide grooves, several teeth are provided on both sides of the second clamping block to form a second rack, a gear is provided between the first rack and the second rack, and the gear meshes with the first rack and the second rack respectively; first anti-slip stripes are provided on the first arc surface and / or the second arc surface, and second anti-slip stripes are provided on the outer surface of the central shaft; the first clamping block and the second clamping block are arranged in a guide channel, the guide channel includes a bottom plate, a top plate and side plates provided on both sides, and openings for the first clamping block and the second clamping block to extend out are provided at both ends of the guide channel; the support mechanism includes an annular hydraulic cylinder, the annular hydraulic cylinder includes a cylinder body with an annular piston cavity, a cylinder head cooperating with the cylinder body, and an annular piston provided in the annular piston cavity; a first guide hole for the central shaft to pass through is provided at the center of the cylinder body; the part of the annular piston extending out of the cylinder body forms a support part and can support the bottom of the bottom plate;

[0007] The mold moving device includes a moving template, spring seats provided on both sides of the moving template, slide rails provided at the bottoms of the spring seats, sliders provided on the movable template and cooperating with the slide rails, support seats provided at the bottom of the moving template, a second driving mechanism for driving the moving template to translate, and a ejector rod mechanism provided on the moving template; the mold is arranged on the moving template, guide grooves are provided on both sides of the moving template, the upper parts of the spring seats extend into the guide grooves, springs are provided between the tops of the spring seats and the moving template, positioning pins are provided on the spring seats, positioning holes are provided on the moving template corresponding to the positioning pins, and the positioning pins extend into the positioning holes; a first gap is provided between the top surface of the spring seat and the moving template, a second gap is provided between the bottom surface of the support seat and the movable template, and the width of the first gap is greater than the width of the second gap.

[0008] The pile-holding device of the present invention can achieve a fast and reliable clamping action of the injection molding machine; after the moving template is closed, the clamping mechanism can quickly clamp the central shaft connected to the moving template, support the moving template by clamping the central shaft. Since the first clamping block and the second clamping block of the clamping mechanism are sleeved on the central shaft itself, they can quickly clamp the central shaft after startup, thereby achieving a fast clamping action; the clamping surfaces of the first clamping block and / or the second clamping block are provided with first anti-slip stripes, and the outer surface of the central shaft is provided with second anti-slip stripes to prevent the central shaft from slipping; after the clamping mechanism acts, the annular hydraulic cylinder acts. Since the relative position between the annular hydraulic cylinder and the bottom plate supporting the clamping mechanism is fixed, the distance between the annular piston and the bottom plate is the stroke of the annular piston. The stroke of the annular hydraulic cylinder can be shortened by adjusting the distance, so that the annular hydraulic cylinder can quickly support the bottom plate, achieving a double clamping action, with higher clamping reliability and energy saving at the same time.

[0009] As an improvement, the clamping oil cylinder is fixed on the bottom plate, and the output shaft of the clamping oil cylinder is connected to the first clamping block through a connecting plate; the top plate is provided with a first through hole for the central shaft to pass through. The top plate is composed of two symmetrical top plate units, and both sides of the top plate unit are locked on the top of the side plate by bolts; the bottom plate is provided with a second through hole for the central shaft to pass through. The bottom plate extends in two opposite directions to be provided with connecting ears, and the ends of the connecting ears are sleeved on the guide posts.

[0010] As an improvement, the cylinder body is square, and the cylinder body is provided with a plurality of fixing holes, and the first driving mechanism and the guide posts are fixed on the cylinder body.

[0011] As an improvement, a first supporting part is formed on the inner side of the annular piston cavity of the cylinder body, and a second supporting part is formed on the outer side of the annular piston cavity of the cylinder body. The supporting part where the annular piston extends out of the cylinder body protrudes inward to form a limiting part that abuts against the top of the first supporting part. The cylinder head includes a connecting part and a blocking part. The connecting part is fixed on the top of the second supporting part by bolts, and oil seals are provided between the inner side of the blocking part and the outer side of the supporting part and between the outer side of the blocking part and the outer wall of the annular piston cavity.

[0012] As an improvement, the top of the first anti-slip stripe is a plane, and the bottom is an inclined plane; the bottom of the second anti-slip stripe is a plane, and the top is an inclined plane.

[0013] As an improvement, both ends of the spring seat are provided with limiting blocks that can abut against the moving template.

[0014] As an improvement, the first driving mechanism is a fast oil cylinder, the second driving mechanism is a cylinder, and the cylinder is fixed on the moving template through a cylinder seat.

[0015] As an improvement, an adjusting mechanism for adjusting the height of the fixed template is provided on the fixed template. The adjusting mechanism includes a threaded section provided on the upper part of the guide post, a nut sleeve threadedly engaged with the threaded section, a pulley sleeved on the nut sleeve, and a belt surrounding each guide post. The belt is engaged with the pulley. A flange is provided outside the nut sleeve, and the flange is locked on the movable template by bolts.

[0016] As an improvement, the screw injection molding device includes a mounting plate, an injection molding motor fixed on the mounting plate, a screw connected to the injection molding motor, a screw barrel engaged with the screw, and a third driving mechanism for driving the mounting plate to move up and down.

[0017] The working method of the injection molding machine of the present invention includes the following steps:

[0018] (1) During the process of the first driving mechanism driving the movable template to move upward for mold closing, the central shaft moves upward following the movable template;

[0019] (2) After the movable template and the fixed template are completely closed, the clamping oil cylinder is started and the first clamping block is pushed forward;

[0020] (3) The movement of the first clamping block drives the gear through the first rack, the rotation of the gear drives the second rack to move, and further enables the first clamping block and the second clamping block to move relative to each other and achieve the action of clamping the central shaft, and the preliminary mold locking is realized through the cooperation of the first anti-slip stripes and the second anti-slip stripes;

[0021] (4) The annular hydraulic cylinder is started and drives the annular piston to move upward, and the top of the annular piston abuts against the bottom of the bottom plate to prevent the bottom plate from sliding downward to achieve complete mold locking;

[0022] (5) The screw injection molding device starts to inject materials into the mold;

[0023] (6) After the materials are formed, the supporting mechanism is reset and the clamping mechanism is reset;

[0024] (7) The first driving mechanism drives the movable template away from the fixed template to achieve mold opening.

[0025] The beneficial effects brought by the present invention compared with the prior art are:

[0026] The pile-holding device of the present invention can achieve fast and reliable clamping actions of the injection molding machine; after the moving template is closed, the clamping mechanism can quickly clamp the central shaft connected to the moving template, and support the moving template by clamping the central shaft. Since the first clamping block and the second clamping block of the clamping mechanism are sleeved on the central shaft itself, they can quickly clamp the central shaft after starting, thus playing a role in quickly clamping the mold; the clamping surfaces of the first clamping block and / or the second clamping block are provided with first anti-slip stripes, and the outer surface of the central shaft is provided with second anti-slip stripes, so as to prevent the central shaft from slipping; after the clamping mechanism acts, the annular hydraulic cylinder acts. Since the relative position between the annular hydraulic cylinder and the bottom plate supporting the clamping mechanism is fixed, the distance between the annular piston and the bottom plate is the stroke of the annular piston. The stroke of the annular hydraulic cylinder can be shortened by adjusting the distance, so that the annular hydraulic cylinder can quickly support the bottom plate, playing a role in double clamping, with higher clamping reliability and energy saving at the same time. The moving template can move the mold out of the injection molding machine, which is convenient for replacing the mold; since there is a spring between the spring seat and the moving template, the moving template is of a floating design. When the mold is closed, the mold is under pressure and pushes the moving template downward. Since the second gap between the support seat and the moving template is smaller than the first gap between the moving template and the spring seat, the support seat contacts the moving template first, thus sharing the pressure exerted by the moving template on the spring seat and preventing the spring seat from being bent due to excessive force on the slide rail. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of an injection molding machine.

[0028] Figure 2 It is a schematic diagram of the mold moving device.

[0029] Figure 3 It is a schematic diagram of the end of the mold moving device.

[0030] Figure 4 It is an exploded view of the fixed template adjusting mechanism.

[0031] Figure 5 It is a schematic diagram of the nut sleeve.

[0032] Figure 6 It is a schematic diagram of the pile-holding device.

[0033] Figure 7 It is an exploded view of the pile-holding device.

[0034] Figure 8 It is a cross-sectional view of the pile-holding device.

[0035] Figure 9 It is a schematic diagram of the clamping state of the clamping mechanism.

[0036] Figure 10 It is a schematic diagram of the unclamped state of the clamping mechanism. Detailed Embodiments

[0037] The present invention will be further described below in conjunction with the accompanying drawings of the specification.

[0038] As Figure 1 shown, an injection molding machine includes a fixed template 2, a screw injection device 1 provided on the fixed template 2, a movable template 5 provided below the fixed template 2, a driving mechanism 7 for driving the movable template 5, a mold moving device 4 installed on the movable template 5, a mold provided on the mold moving device 4, and a pile holding device 6 provided below the movable template 5. Four guide columns 3 are provided between the movable template 5 and the fixed template 2. The four corners of the fixed template are fixed on the guide columns 3 through nuts. The movable template 5 is provided with guide holes cooperating with the guide columns 3. The first driving mechanism 7 can drive the movable template 5 to move away from or close to the fixed template 2, thereby realizing the actions of mold opening or mold closing. The first driving mechanism is a fast oil cylinder.

[0039] The screw injection device includes a mounting plate, an injection molding motor fixed on the mounting plate, a screw connected to the injection molding motor, a screw barrel cooperating with the screw, and a third driving mechanism for driving the mounting plate to move up and down.

[0040] As Figure 4 、 5 shown, an adjusting mechanism 8 for adjusting the height of the fixed template 2 is provided on the fixed template 2. The adjusting mechanism 8 includes a threaded section 31 provided at the upper part of the guide column 3, a nut sleeve 81 threadedly cooperating with the threaded section 31, a pulley 82 sleeved on the nut sleeve 81, and a belt 83 surrounding each guide column 3. The belt 83 cooperates with the pulley 82. Through the cooperation between the belt 83 and each pulley 82, the belt 83 can drive four pulleys 82 to rotate synchronously at one time, and the pulley 82 is connected to the nut sleeve 81. Therefore, four nut sleeves 81 can be driven to rotate synchronously, and finally the function of simultaneously adjusting the lifting of the four corners of the fixed template 2 can be achieved. A bearing 85 is provided outside the nut sleeve 81. A bearing hole 21 is provided on the fixed template 2. A flange 84 is provided outside the nut sleeve 81. The diameter of the flange 84 is larger than the diameter of the bearing hole 21 and the flange 84 is locked on the movable template 2 through bolts. When the height position of the fixed template 2 needs to be adjusted, the bolts on the flange 84 are loosened, and the four nut sleeves 81 are rotated synchronously through the cooperation between the belt 83 and the pulley 82. The fixed template moves up and down relative to the threaded section 31 following the nut sleeve 81. When the position of the fixed template is determined, the nuts on the flange are locked again to prevent the nut sleeve 81 from rotating.

[0041] As Figure 2 、 3As shown in the figure, the mold moving device 4 includes a moving template 41, elongated spring seats 46 provided on both sides of the moving template 41, slide rails 45 provided at the bottoms of the spring seats 46, sliders 44 provided on the movable template 5 and cooperating with the slide rails 45, a support seat 42 provided at the bottom of the moving template 41, a second driving mechanism 48 for driving the moving template 41 to translate, and an ejector rod mechanism 43 provided on the moving template 41. The second driving mechanism 48 is a cylinder, which is formed to be able to push the moving template 41 out of the injection molding machine. The mold is provided on the moving template 41 and corresponds to the ejector rod mechanism 43. Guide grooves are provided on both sides of the moving template 41. The upper parts of the spring seats 46 extend into the guide grooves. A spring 49 and a positioning pin are provided between the top of the spring seat 46 and the moving template 41. The spring 49 is sleeved on the positioning pin. Positioning holes are provided on the moving template 41 corresponding to the positioning pins. The positioning pins extend into the positioning holes. Through the cooperation of the positioning pins and the positioning holes, the moving template 41 can drive the spring seats 46, and the spring seats 46 drive the slide rails 45. A first gap 411 is provided between the top surface of the spring seat 46 and the moving template 41. A second gap 421 is provided between the bottom surface of the support seat 42 and the movable template 5. The width of the first gap 411 is greater than the width of the second gap 421. The second driving mechanism cooperates with the moving template 41 to move the mold out of the injection molding machine, which is convenient for replacing the mold. Since a spring 49 is provided between the spring seat 46 and the moving template 41, the moving template 41 is of a floating design. When clamping the mold, the mold is pressed to push the moving template 41 to move downward. Since the second gap 421 between the support seat 42 and the movable template 5 is smaller than the first gap 411 between the moving template 41 and the spring seat 46, the support seat 42 contacts the movable template 5 first, thereby sharing the pressure exerted by the moving template 41 on the spring seat 46 and preventing the spring seat 46 from being bent due to excessive force on the slide rail 45.

[0042] As Figure 6 shown, the pile holding device 6 includes a central shaft 63 connected to the movable template 5, a holding mechanism 61 for holding the central shaft 63, and a support mechanism 62 for supporting the holding mechanism 61.

[0043] As Figure 7 , 9As shown in FIGS. 10, the clamping mechanism 61 includes a first clamping block 612, a second clamping block 613 disposed opposite to the first clamping block 612, and a clamping oil cylinder 611 connected to the first clamping block 612. At the middle position of the surface of the first clamping block 612 opposite to the second clamping block 613, there is a first arc surface 6121, the first arc surface 6121 is semi-circular, and there are first anti-slip stripes on the first arc surface 6121; on both sides of the first arc surface 6121, there are first guide grooves 6122, and the outer sides of the first guide grooves 6122 extend forward to form a first rack 6123; the clamping oil cylinder 611 acts on the surface of the first clamping block 612 facing away from the second clamping block 613, and the output shaft of the clamping oil cylinder 611 is connected to the first clamping block 612 through a connecting plate. At the middle of the surface of the second clamping block 613 opposite to the first clamping block 612, there is a second arc surface 6131, the second arc surface 6131 is semi-circular, and the first arc surface 6121 and the second arc surface 6131 can cooperate to form a circular clamping opening; on both sides of the second arc surface 6131, there are first guide blocks 6132 extending forward and cooperating with the first guide grooves 6122; on both sides of the second clamping block 613, there are several teeth to form a second rack 6133, and there is a gear 618 between the first rack 6123 and the second rack 6133, and the gear 618 meshes with the first rack 6123 and the second rack 6133 respectively. The clamping oil cylinder 611 pushes the first clamping block 612, and the first clamping block 612 drives the second clamping block 613 to move relatively through the gear 618, so as to realize the clamping action. The outer surface of the central shaft 63 is provided with second anti-slip stripes, which cooperate with the first anti-slip stripes on the first clamping block 612. After the first clamping block 612 clamps the central shaft 63, through the dislocation cooperation of the first anti-slip stripes and the second anti-slip stripes, the central shaft 63 can be prevented from sliding down; the top of the first anti-slip stripes is a plane, and the bottom is an inclined plane; the bottom of the second anti-slip stripes is a plane, and the top is an inclined plane.

[0044] As Figure 7 shown, the first clamping block 612 and the second clamping block 613 are arranged in a guide channel. The guide channel includes a bottom plate 616, a top plate 614 and side plates 615 arranged on both sides. Openings for the first clamping block 612 and the second clamping block 613 to extend out are provided at both ends of the guide channel, and the guide channel can make the movement of the first clamping block 612 and the second clamping block 613 smoother. The top plate 614 is provided with a first through hole for the central shaft 63 to pass through. The top plate 614 is composed of two symmetric top plate units 614. The two sides of the top plate unit 614 are locked to the top of the side plate 615 through bolts. The bottom plate 616 is provided with a second through hole for the central shaft 63 to pass through. The bottom plate 616 extends in two opposite directions and is provided with connecting ears 617. The ends of the connecting ears 617 are sleeved on the guide posts 3, so as to fix the clamping mechanism 61.

[0045] As Figure 7 , 8 shown, the support mechanism 62 includes a ring hydraulic cylinder, and the ring hydraulic cylinder includes a cylinder block 621 with a ring piston chamber, a cylinder head 622 cooperating with the cylinder block 621, and a ring piston 623 arranged in the ring piston chamber. The cylinder block 621 is square, and a first guiding hole for the central shaft 63 to pass through is provided at the center of the cylinder block 621. A plurality of fixing holes are provided on the cylinder block 621 and can be used to install components such as the first driving mechanism and the guide post 3. The part of the ring piston 623 extending out of the cylinder block 621 forms a support portion 6231 and can support the bottom of the bottom plate 616; a first support portion 6211 is formed on the cylinder block 621 inside the ring piston chamber, and a second support portion 6212 is formed on the cylinder block 621 outside the ring piston chamber. The support portion 6231 of the ring piston 623 extending out of the cylinder block 621 protrudes inward to form a limiting portion 6232 that abuts against the top of the first support portion 6211. The cylinder head 622 includes a connecting portion and a blocking portion. The connecting portion is fixed to the top of the second support portion by bolts, and oil seals are provided between the inner side of the blocking portion and the outer side of the support portion and between the outer side of the blocking portion and the outer wall of the ring piston chamber.

[0046] The working method of the injection molding machine of the present invention includes the following steps:

[0047] (1) During the process of the first driving mechanism 77 driving the movable template 5 to move upward for mold closing, the central shaft 63 moves upward following the movable template 5;

[0048] (2) When the movable template 5 and the fixed template 2 are completely closed, the clamping oil cylinder 611 is started and pushes the first clamping block 612 to move forward;

[0049] (3) The movement of the first clamping block 612 drives the gear 618 through the first rack 6123, and the rotation of the gear 618 drives the second rack 6133 to move, so that the first clamping block 612 and the second clamping block 613 move relatively and realize the action of clamping the central shaft 63, and the preliminary mold locking is realized through the cooperation of the first anti-slip stripes and the second anti-slip stripes;

[0050] (4) The ring hydraulic cylinder is started and drives the ring piston 623 to move upward, and the top of the ring piston 623 abuts against the bottom of the bottom plate 616 to prevent the bottom plate from sliding downward to realize complete mold locking;

[0051] (5) The screw injection device 1 starts to inject materials into the mold;

[0052] (6) After the materials are formed, the support mechanism 62 is reset, and the clamping mechanism 61 is reset;

[0053] (7) The first driving mechanism 7 drives the movable template 5 to move away from the fixed template 2 to realize mold opening.

Claims

1. An injection molding machine, comprising a fixed template, a screw injection device provided on the fixed template, a movable template provided below the fixed template, a first driving mechanism for driving the movable template, and a mold provided on the movable template; characterized in that: It also includes a mold shifting device installed on the movable template and a pile holding device provided below the movable template; the pile holding device includes a central shaft connected to the movable template, a holding mechanism for holding the central shaft, and a supporting mechanism for supporting the holding mechanism; The cam is connected to the second gear of the driving member and the gear train is connected with the gear train of the driving member, and the cam is connected with the gear of the driving member. The two ends are provided with openings for the first clamping block and the second clamping block to extend out; the support mechanism includes an annular hydraulic cylinder, which includes a cylinder body with an annular piston cavity, a cylinder cover cooperating with the cylinder body and an annular piston arranged in the annular piston cavity; a first guide hole for the central axis to pass through is provided in the center of the cylinder body; the part of the annular piston extending out of the cylinder body forms a support part and can support the bottom of the base plate; the cylinder body is square, and a plurality of fixing holes are provided on the cylinder body, and the first driving mechanism and the guide column are fixed to the cylinder body; a first support part is formed on the inner side of the annular piston cavity on the cylinder body, and a second support part is formed on the outer side of the annular piston cavity on the cylinder body, and the support part of the annular piston extending out of the cylinder body protrudes inwardly to form a limiting part that abuts against the top of the first support part, and the cylinder cover includes a connecting part and a sealing part, and the connecting part is fixed to the top of the second supporting part by bolts, and an oil seal is provided between the inner side of the sealing part and the outer side of the supporting part, and between the outer side of the sealing part and the outer wall of the annular piston cavity; the top of the first anti-slip stripe is flat and the bottom is inclined; the bottom of the second anti-slip stripe is flat and the top is inclined; The mold moving device includes a moving template, spring seats arranged on both sides of the moving template, slide rails arranged at the bottoms of the spring seats, sliders arranged on the movable template and cooperating with the slide rails, a support seat arranged at the bottom of the moving template, a second driving mechanism for driving the moving template to translate, and a ejector rod mechanism arranged on the moving template; the mold is arranged on the moving template, guide grooves are arranged on both sides of the moving template, the upper parts of the spring seats extend into the guide grooves, springs are arranged between the tops of the spring seats and the moving template, positioning pins are arranged on the spring seats, positioning holes are arranged on the moving template corresponding to the positioning pins, and the positioning pins extend into the positioning holes; a first gap is arranged between the top surface of the spring seat and the moving template, a second gap is arranged between the bottom surface of the support seat and the movable template, and the width of the first gap is greater than the width of the second gap.

2. The injection molding machine according to claim 1, wherein: The clamping oil cylinder is fixed on the bottom plate, and the output shaft of the clamping oil cylinder is connected with the first clamping block through a connecting plate; the top plate is provided with a first through hole for the central shaft to pass through, the top plate is composed of two symmetrical top plate units, and both sides of the top plate unit are locked on the top of the side plate by bolts; the bottom plate is provided with a second through hole for the central shaft to pass through, the bottom plate extends in two opposite directions to be provided with connecting ears, and the ends of the connecting ears are sleeved on the guide posts.

3. An injection molding machine according to claim 1, characterized in that: The top of the first anti-slip stripe is a plane, and the bottom is an inclined plane; the bottom of the second anti-slip stripe is a plane, and the top is an inclined plane.

4. An injection molding machine according to claim 1, characterized in that: Limit blocks that can abut against the movable template are arranged at both ends of the spring seat.

5. An injection molding machine according to claim 1, wherein: The first driving mechanism is a fast oil cylinder, the second driving mechanism is a cylinder, and the cylinder is fixed on the movable template through a cylinder seat.

6. The injection molding machine according to claim 1, wherein: An adjusting mechanism for adjusting the height of the fixed template is arranged on the fixed template. The adjusting mechanism includes a threaded section arranged on the upper part of the guide post, a nut sleeve threadedly matched with the threaded section, a pulley sleeved on the nut sleeve, and a belt surrounding each guide post. The belt cooperates with the pulley. A flange is arranged outside the nut sleeve, and the flange is locked on the movable template by bolts.

7. An injection molding machine according to claim 1, characterized in that: The screw injection molding device includes a mounting plate, an injection molding motor fixed on the mounting plate, a screw connected with the injection molding motor, a screw barrel cooperating with the screw, and a third driving mechanism for driving the mounting plate to move up and down.

8. A working method of an injection molding machine as claimed in claim 1, characterized in that, It includes the following steps: (1) During the process of the first driving mechanism driving the movable template to move upward for mold closing, the central shaft moves upward following the movable template; (2) After the movable template and the fixed template are completely closed, the clamping oil cylinder is started and the first clamping block is pushed forward; (3) The movement of the first clamping block drives the gear through the first rack, the rotation of the gear drives the second rack to move, and further enables the first clamping block and the second clamping block to move relative to each other and realize the action of clamping the central shaft. The initial mold locking is realized through the cooperation of the first anti-slip stripe and the second anti-slip stripe; (4) The annular hydraulic cylinder is started and drives the annular piston to move upward, and the top of the annular piston abuts against the bottom of the bottom plate to prevent the bottom plate from sliding downward to realize complete mold locking; (5) The screw injection molding device starts to inject materials into the mold; (6) After the materials are molded, the supporting mechanism is reset and the clamping mechanism is reset; (7) The first driving mechanism drives the movable template to move away from the fixed template to realize mold opening.

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