CN114683501A - Injection molding machine clamping structure - Google Patents

Abstract

The invention relates to the technical field of injection molding machines, in particular to a mold clamping structure of an injection molding machine, which comprises a tail plate, a driving part, a connecting guide column and a fixed head plate provided with an injection port; the tail of the connecting guide column is a clamped section and is provided with Holding clip slot; the tail plate is provided with holding clip components, and the clipped sections pass through the holding clip components respectively; when viewed axially, the boundary of the fixed head plate is a bounding rectangle, the center of the bounding rectangle is the center of the rectangle, and the horizontal line passing through the center of the rectangle The vertical lines are the horizontal center line and the vertical center line respectively; the tail plate is located in the bounding rectangle; the diameter of the connecting guide column is within 15% of the shorter side of the center of the rectangle; the connecting guide column includes the outer guide column and the side guide column. The inner guide column; the outer guide column is located at the four corners of the bounding rectangle, and each inner guide column is close to the center of the rectangle relative to its corresponding outer guide column. The present invention can directly utilize the existing connecting guide posts to realize high clamping force of the mold clamping, which is beneficial to reduce the cost.

Description

Injection molding machine clamping structure

technical field

The invention relates to the technical field of injection molding machines, in particular to a mold clamping structure of an injection molding machine.

Background technique

CN212266573U discloses a hydraulic clamping injection molding machine clamping structure, which includes a moving plate, a tail plate assembly, a connecting assembly and a fixed plate; the tail plate assembly includes a tail plate plunger and a tail plate with a tail plate plunger cavity; the tail plate column The plug is embedded in the plunger cavity of the tail plate, and one end is fixedly connected with the moving plate; the section of the moving plate and the cross-section of the tail plate are all rectangular as a whole; the moving plate and the tail plate assembly are connected with the fixed plate in a linear movement through the connecting assembly; the tail plate column The number of plug and tailgate plunger cavity) is equal and more than two. Among them, the connecting guide columns are four which are distributed in the four corners of the moving plate.

CN212266573U discloses a clamping structure of a hydraulic clamping injection molding machine, which is generally suitable for situations where the clamping force of the clamping is small, for example, the clamping force of the clamping is less than 8000 tons. However, with the development of economy and society, the demand for injection molding machines with clamping force above 8,000 tons is increasing.

To sum up, the prior art has at least the following technical problems:

First, in theory, the structure of CN212266573U is enlarged in a certain proportion, for example, the diameter of the connecting guide column is enlarged in a certain proportion, so that the applicable clamping force can be enlarged in a certain proportion. However, when the diameter of the connecting guide post exceeds a certain value, it must be specially customized, which increases the difficulty of manufacturing and greatly increases the production cost and production cycle.

SUMMARY OF THE INVENTION

An object of the present invention is to solve or alleviate the above-mentioned first technical problem.

The method adopted in the present invention is the injection molding machine clamping structure, which includes a tail plate, a driving part, a connecting guide column, and a fixed head plate provided with an injection port; ;The tail plate is provided with a clamp assembly, and the clamped sections pass through the clamp assembly respectively; when viewed axially, the boundary of the fixed head plate is a bounding rectangle, the center of the bounding rectangle is the center of the rectangle, and the horizontal and vertical lines passing through the center of the rectangle The lines are the transverse center line and the longitudinal center line respectively; the tail plate is located within the bounding rectangle; the diameter of the connecting guide column is within 15% of the shorter side of the center of the rectangle; the connecting guide column includes an outer guide column and an inner guide column ; The outer guide columns are located at the four corners of the bounding rectangle, and each inner guide column is close to the center of the rectangle relative to its corresponding outer guide column; the number of inner guide columns is an integer multiple of four, and the inner guide columns are Regarding the setting of the mirror symmetry of the horizontal centerline and the vertical centerline.

The effect achieved by the present invention is that a high clamping force can be realized by directly using the existing connecting guide post, which is beneficial to reducing the cost.

In a further technical solution, the inner guide column is located at the same level as the outer guide column. It can provide a larger installation space for the injection mold, and can make the fixed head plate or tail plate bear relatively uniform force.

In a further technical solution, the width and length of the bounding rectangle are respectively the width and length of the bounding rectangle, the width of the bounding rectangle is smaller than the length of the bounding rectangle, and the side where the length of the bounding rectangle of the fixed head plate is fixed is provided with standing feet. When the fixed head plate is used, it is in a horizontal position, which is relatively stable.

In a further technical solution, a guide column high-voltage assembly is arranged on the fixed head plate, and one end of the connecting guide column is located in the guide column high-voltage assembly, or the guide column high-voltage assembly is arranged on the tail plate.

A further technical solution also includes a second plate and a second plate high pressure oil cylinder, the outer guide column and the inner guide column pass through the second plate respectively; the second plate high pressure oil cylinder is respectively connected with the second plate and the fixed head plate; the second plate high pressure oil cylinder includes two plates. Plate high pressure plunger and second plate high pressure plunger cavity; the second plate high pressure plunger cavity is arranged in the fixed head plate, and the second plate high pressure plunger is embedded in the second plate high pressure plunger cavity. It can make the output thrust of each two-plate high-pressure plunger equal, and the injection mold is evenly stressed.

In a further technical solution, there are six two-plate high-pressure plungers, which are symmetrically arranged with respect to the transverse centerline and the longitudinal centerline, and the axis lines of the two middle two-plate high-pressure plungers are located on the longitudinal centerline. It can supplement the centering pressure to the injection mold to ensure the tightness of the injection mold.

In a further technical solution, the two-plate high-pressure oil cylinders are 2N in regular geometric arrangement, and N is an integer greater than or equal to 2.

In a further technical solution, the number of two-plate high-pressure plungers is six and will be symmetrically arranged with respect to the lateral centerline and the longitudinal centerline. The axis lines of the two middle two-plate high-pressure plungers are located on the longitudinal centerline; The rectangle formed by the successive connection of the axis lines of the two two-plate high-pressure plungers is a similar rectangle in the center of the rectangle; the two middle two-plate high-pressure plungers are located on the long sides of the similar rectangle and on the outer guide posts. Between the axis line and the horizontal line connecting the axis line of the inner guide column. It can ensure that the injection mold is uniformly stressed in the height direction.

In a further technical solution, the thickness of the fixed head plate and the thickness of the tail plate are both more than 30% of the bounding rectangle; when viewed axially, the axis line of the outer guide column and the center of the rectangle are the connection line of the outer guide column, The axis lines of the inner guide columns are respectively located on the connecting lines of the outer guide columns. It can ensure the strength of the second plate and the fixed head plate when large tonnage and high clamping force are used; it can also ensure that the connecting guide column is not easy to bend.

A further technical solution also includes the second plate and the second plate high pressure oil cylinder, the outer guide column and the inner guide column pass through the second plate respectively; the second plate high pressure oil cylinder is respectively connected with the second plate and the tail plate; it also includes a bottom sliding component; The sliding component includes a sliding foot and a sliding foot pad; the bottom of the second plate and the bottom of the tail plate are respectively fixedly connected with the sliding foot, and the sliding foot is placed on the sliding foot pad.

In a further technical solution, there are two bottom sliding components, two sides of the bottom of the second plate and two sides of the bottom of the tail plate are respectively fixedly connected with two sliding feet, and the two sliding surfaces are both inwardly inclined planes. Can ensure injection accuracy.

To sum up, the present invention can achieve the following technical effects, and can directly use the existing connecting guide posts to achieve high clamping force for mold clamping, which is beneficial to reducing costs. It can provide a larger installation space for the injection mold, and can make the fixed head plate or tail plate bear relatively uniform force. It can make the output thrust of each two-plate high-pressure plunger equal, and the injection mold is evenly stressed.

Description of drawings

Figure 1 shows the first to fourth embodiments; Figures 2 to 5 show the first embodiment; Figures 6 to 7 show the second embodiment; Figures 8 to 12 show the third embodiment; Fourth Embodiment.

Fig. 1 is a three-dimensional schematic diagram showing the first to fourth embodiments sequentially from left to right; it should be emphasized that the first to fourth embodiments are simultaneously shown in Fig. 1, only for the convenience of identifying the first to fourth embodiments For example, the relative ratio between them is not limited; for example, the scaling ratio of the first embodiment is 1, and the scaling ratio of the fourth embodiment may be 1, 0.5 or other scaling ratios; the case of the second and third embodiments It is also similar and will not be repeated here.

FIG. 2 is a schematic perspective view of the mold clamping structure of the injection molding machine according to the first embodiment.

FIG. 3 is a schematic perspective view of the mold clamping structure of the injection molding machine of the first embodiment from another perspective.

FIG. 4 is a schematic view of the fixed head plate 1 facing the tail plate 2 of the mold clamping structure of the injection molding machine according to the first embodiment.

FIG. 5 is a schematic diagram of the viewing angle of the tail plate 2 facing the fixed head plate 1 of the mold clamping structure of the injection molding machine according to the first embodiment; the line LINE1 represents the horizontal reference line.

FIG. 6 is a perspective view of the mold clamping structure of the injection molding machine according to the second embodiment.

FIG. 7 is a schematic perspective view of another perspective view of the mold clamping structure of the injection molding machine according to the second embodiment.

FIG. 8 is a perspective view of the mold clamping structure of the injection molding machine according to the third embodiment.

FIG. 9 is a schematic perspective view of another perspective view of the mold clamping structure of the injection molding machine according to the third embodiment.

FIG. 10 is a perspective view of the fixed head plate 1 and the two-plate high-pressure oil cylinder 31 of the third embodiment.

11 is a schematic top view of the mold clamping structure of the injection molding machine according to the third embodiment.

12 is a schematic diagram of section one SEC1; line one LINE1 represents a horizontal reference line; line two LINE2 represents a reference rectangle formed by connecting the axis lines of the four outer two-plate high-pressure oil cylinders 31 in sequence.

FIG. 13 is a perspective view of the mold clamping structure of the injection molding machine according to the fourth embodiment.

FIG. 14 is a schematic perspective view of another perspective view of the mold clamping structure of the injection molding machine according to the fourth embodiment.

15 is a schematic view of the fixed head plate 1 facing the tail plate 2 of the mold clamping structure of the injection molding machine according to the fourth embodiment.

FIG. 16 is a schematic view of the tail plate 2 facing the fixed head plate 1 of the mold clamping structure of the injection molding machine according to the fourth embodiment.

FIG. 17 is a perspective view of the tail plate 2 and the two-plate high-pressure oil cylinder 31 of the fourth embodiment.

18 is a schematic side view of the mold clamping structure of the injection molding machine according to the fourth embodiment.

FIG. 19 is a schematic diagram of the second section SEC2.

Section 1 SEC1; Section 2 SEC2; Line 1 LINE1; Line 2 LINE2; Fixed Head Plate 1; Injection Mouth 11; Bounding Rectangle 12; Rectangle Center 121; Line 125; stand foot 19; tail plate 2; thimble assembly 29; thimble 291; thimble plate 292; Cavity 312; reset cylinder 32; reset plunger 321; bottom sliding assembly 33; sliding foot 331; sliding foot pad 332; two-plate connecting piece 333; sliding surface 334; ; Outer guide column 52; Inner guide column 53; Outer guide column connection 54; Guide column high pressure assembly 58; High pressure transparent cover 581; Block 91;

Detailed ways

The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The first embodiment, the mold clamping structure of the injection molding machine in the first embodiment is a mold clamping structure of a two-plate injection molding machine. The clamping structure of the two-platen injection molding machine in this embodiment is generally suitable for a high clamping force of more than 8,000 tons.

The mold clamping structure of the two-platen injection molding machine of the first embodiment includes a tail plate 2, a driving member 4, a connecting guide column 5 and a fixed head plate 1 provided with an injection port 11; the tail of the connecting guide column 5 is the clamped section 59 and is provided with a holding clip slot (not shown in the drawings). The tail board 2 is connected with the fixed head board 1 through the driving member 4 , so that the tail board 2 can move toward the fixed head board 1 . For example, the driving member 4 is a cylinder, and the power output ends of the driving member 4 and the driving member 4 are connected to the tail plate 2 and the fixed head plate 1 respectively, so that the tail plate 2 and the fixed head plate 1 are connected through the driving member 4 . The connecting guide post 5 is cylindrical. It should be noted that the axial direction and the radial direction are based on the connection guide column 5 .

Before use, move the tail plate 2 until the distance between the tail plate 2 and the fixed head plate 1 is large, and then fix the two parts of the injection mold (not shown in the drawing) on the tail plate 2 and the fixed head plate 1 respectively. After it is installed, move the tail plate 2 until the distance between the tail plate 2 and the fixed head plate 1 is reduced, and after the two parts of the injection mold are fitted and sealed, the plastic is injected from the injection port 11 of the fixed head plate 1 under high pressure. Plastic workpieces can be formed in the mold. The movement of the tail plate 2 separates the two parts of the injection mold and can then be taken out into a plastic workpiece.

The tail plate 2 is provided with a holding clip assembly 9, and the clipped sections 59 pass through the holding clip assembly 9 respectively. The clamp assembly 9 includes a clamp block 91 and a clamp power member 92. The clamp block 91 is fixedly connected to the power output end of the clamp power member 92, so that the clamp block 91 has the power to move radially. For example, the gripping power member 92 is a linear power member such as an air cylinder or a hydraulic cylinder, and its power output end is fixedly connected with the gripping block 91, and the gripping block 91 is provided with a groove with a roughly semicircular cross-section. The gripping blocks 91 of the two gripping assemblies 9 move relative to each other, and the movement is a radial linear motion, so that the gripping is achieved by the substantially semicircular groove abutting against the connecting guide post 5 . The cross-section of the clamping groove is a right-angled triangle (not shown in the drawings) or a right-angled trapezoid as a whole, and the hypotenuse of the right-angled triangle or the right-angled trapezoid is away from the fixed head plate 1 . During injection molding, the distance between the fixed head plate 1 and the tail plate 2 can be kept unchanged or changed little, and the sealing of the injection mold can be ensured.

As one of the specific embodiments, the tail plate 2 is provided with a thimble assembly 29; the thimble assembly 29 includes a thimble power member 293 fixed on the tail plate 2 (the fixing column for fixing is not shown in the drawings), and the thimble power member 293 cylinder or hydraulic cylinder and other linear power components, the power output end of the thimble power component 293 is fixedly connected with a cross-shaped thimble plate 292, and a plurality of thimble plates 292 are connected to the thimble plate 292, and the thimble 291 passes through the tail plate 2. The ejector pin 291 is powered by the ejector pin power member 293 to push against the plastic workpiece in the injection mold to demold the plastic workpiece in the injection mold.

When viewed axially, the boundary of the fixed head plate 1 is the boundary rectangle 12, the center of the boundary rectangle 12 is the rectangle center 121, and the horizontal and vertical lines passing through the rectangular center 121 are the horizontal center line 124 and the longitudinal center line 125 respectively; 2 is within bounding rectangle 12. The width and length of the bounding rectangle 12 are respectively the width 122 of the bounding rectangle and the length 123 of the bounding rectangle. Generally, the boundary of the tailgate 2 is rectangular, and substantially coincides with the boundary rectangle 12 .

The diameter of the connecting guide post 5 (ie the guide post diameter 51 ) is within 15% of the shorter side of the center 121 of the rectangle (ie the width 122 of the bounding rectangle). For example, the diameter of the connecting guide column 5 is 200 mm, and the width 122 of the bounding rectangle is 2050 mm for the shorter side. As one of the specific embodiments, the diameter of the connecting guide post 5 is 150-1000 mm.

The connecting guide column 5 includes an outer guide column 52 and an inner guide column 53; the outer guide column 52 is located at the four corners of the bounding rectangle 12, and each inner guide column 53 is relatively close to its corresponding outer guide column 52 Rectangular center 121. The outer guide column 52 corresponding to each inner guide column 53 means that the rectangular center 121 is divided into four quadrants with the rectangular center 121 as the origin of the coordinate axis, and the inner guide column 53 in one quadrant corresponds to the inner The outer guide column 52.

The number of the inner guide columns 53 is an integer multiple of four, and the inner guide columns 53 are arranged mirror-symmetrically with respect to the transverse center line 124 and the longitudinal center line 125 .

There is no need to produce a large-diameter connecting guide post 5, and a high clamping force can be achieved by directly using the existing connecting guide post 5, which is beneficial to reduce costs.

As one of the specific embodiments, the inner guide column 53 is located at the same level of the outer guide column 52 .

It can provide a larger installation space for the injection mold, and compared with the structure in which one guide column replaces one outer guide column 52 and its corresponding inner guide column 53, the inner guide column 53 is used to fix the head plate 1 or the tail plate. The force of 2 is closer to the center 121 of the rectangle, which can make the fixed head plate 1 or the tail plate 2 receive relatively uniform force.

As one of the specific implementations, the width and length of the bounding rectangle 12 are respectively the width of the bounding rectangle 122 and the length of the bounding rectangle 123, the width of the bounding rectangle 122 is smaller than the length of the bounding rectangle 123, and the side where the length of the bounding rectangle 123 of the fixed head plate 1 is located is fixedly set. There are standing feet 19. The vertical feet 19 are used for installation and fixation during use or are placed on the ground, and the fixed head plate 1 is in a horizontal state when in use, which is relatively stable.

As one of the specific embodiments, the number of the inner guide columns 53 is four.

As one of the specific implementations, the fixed head plate 1 is provided with a guide column high-voltage assembly 58 , and one end of the connecting guide column 5 is located in the guide column high-voltage assembly 58 . The guide column high pressure assembly 58 includes a high pressure transparent cover 581 and a high pressure end cover 582, the connecting guide column 5 passes through the high pressure transparent cover 581, and the high pressure end cover 582 seals the high pressure transparent cover 581. Hydraulic oil is provided in the high-pressure assembly 58 of the guide column, which can realize damping and buffering.

The second embodiment, the injection molding machine clamping structure of the second embodiment is a two-plate injection molding machine clamping structure.

The difference between the two-platen injection molding machine clamping structure of the second embodiment and the two-platen injection molding machine clamping structure of the first embodiment is that the guide column high-pressure assembly 58 is arranged on the tail plate 2 .

The third embodiment, the mold clamping structure of the injection molding machine of the third embodiment is a mold clamping structure of a three-plate injection molding machine. The clamping structure of the three-platen injection molding machine of this embodiment is generally applicable to a higher clamping force (higher than the clamping force of the first embodiment).

The mold clamping structure of the three-plate injection molding machine in the third embodiment further includes a second plate 3 and a two-plate high-pressure oil cylinder 31. The outer guide column 52 and the inner guide column 53 respectively pass through the second plate 3; Board 3 and fixed head board 1 are connected.

The two-plate high-pressure oil cylinder 31 is based on the fixed fixed head plate 1, and provides thrust to push the two-plate 3, without making the connecting guide column 5 bear the thrust of the two-plate high-pressure oil cylinder 31. Compared with the first and second embodiments, only by Minor modifications can further increase the clamping force.

As one of the specific embodiments, the two-plate high-pressure oil cylinder 31 includes a two-plate high-pressure plunger 311 and a two-plate high-pressure plunger cavity 312; Embedded into the two-plate high-pressure plunger cavity 312 . It can make the thrusts output by the two-plate high-pressure plungers 311 are equal, and the injection mold is uniformly stressed.

As one of the specific embodiments, the fixed head plate 1 is hollow so that the high-pressure plunger chambers 312 of the two plates are communicated. The hollow structure of the fixed head plate 1 is similar to CN212266573U, and will not be repeated here. Since the fixed head plate 1 is fixed, the pipelines for delivering hydraulic oil to the fixed head plate 1 are also fixed, and auxiliary devices such as drag chains are not required, which is beneficial to reduce costs and improve reliability.

As one of the specific embodiments, it also includes a reset oil cylinder 32, and the two-plate high-pressure plunger 311 is respectively connected with the second plate 3 and the fixed head plate 1; the reset oil cylinder 32 provides a pulling force, which can make the second plate 3 and the fixed head plate 1 close to each other And reset.

As one of the specific implementations, the two-plate high-pressure oil cylinders 31 are 2N in regular geometric arrangement, and N is an integer greater than or equal to 2. For example, there are six two-plate high-pressure plungers 311 and are symmetrically arranged with respect to the transverse centerline 124 and the longitudinal centerline 125, and the axis lines of the two middle two-plate high-pressure plungers 311 are located on the longitudinal centerline 125. It can supplement the centering pressure to the injection mold to ensure the tightness of the injection mold.

As one of the specific embodiments, the rectangle formed by successively connecting the axis lines of the four outer two-plate high-voltage plungers 311 is a rectangle similar to the rectangle center 121 . The interaction force distribution between the fixed head plate 1 and the second plate 3 can be relatively uniform.

As one of the specific implementations, the two central two-plate high-pressure plungers 311 are respectively located on the long sides of a similar rectangle, at the horizontal connection between the axis line of the outer guide column 52 and the axis line of the inner guide column 53 . between lines (LINE1 shown in Figure 12). For example, the upper two-plate high-pressure plunger 311 is located between the upper long side of a similar rectangle and the horizontal connection line between the axis line of the upper outer guide column 52 and the axis line of the inner guide column 53 . It can ensure that the injection mold is uniformly stressed in the height direction.

The fourth embodiment, the mold clamping structure of the injection molding machine of the fourth embodiment is a mold clamping structure of a large-tonnage injection molding machine. The large-tonnage injection molding machine clamping structure of this embodiment is generally suitable for large-tonnage and high clamping force (higher than the clamping force of the third embodiment, which may result in a heavier overall weight).

In the mold clamping structure of the large-tonnage injection molding machine of the fourth embodiment, the thickness of the fixed head plate 1 and the thickness of the tail plate 2 are both more than 30% of the boundary rectangle 12 .

When viewed axially, the axis line of the outer guide column 52 and the rectangular center 121 are the line 54 of the outer guide column, and the axis line of the inner guide column 53 is located on the line 54 of the outer guide column, respectively.

Although the injection mold can only be installed to a small area between the innermost four inner guide columns 53, the installation space of the injection mold is limited, but it can ensure the second plate 3 and the fixed head when the large tonnage and high clamping force are used. At the same time, the outer guide column 52 and the inner guide column 53 are dislocated in the height direction, which can ensure that the connecting guide column 5 is not easy to bend.

As one of specific embodiments, there are four inner guide posts 53 .

As one of the specific embodiments, it also includes the second plate 3 and the second plate high pressure cylinder 31, the outer guide column 52 and the inner guide column 53 respectively pass through the second plate 3; the second plate high pressure oil cylinder 31 is connected to the second plate 3, the tail Board 2 is connected.

As one of the specific embodiments, it also includes a bottom sliding assembly 33; the bottom sliding assembly 33 includes a sliding foot 331 and a sliding foot pad 332; The foot 331 is placed on the sliding foot pad 332, so that it can slide linearly along the sliding foot pad 332. The contact surface between the sliding foot 331 and the sliding foot 331 is the sliding surface 334, and the sliding surface 334 is usually provided with a smoother surface such as a copper sheet. Material. Before use, the sliding foot plate 332 is fixed on the injection molding machine. For example, the sliding foot 331 is fixedly provided with a second-plate connecting piece 333 , and the second-plate connecting piece 333 is fixedly connected to the side surface of the bottom of the second-plate 3 . The dead weight tonnage of the tail plate 2 and the second plate 3 is relatively large, and the bottom sliding assembly 33 can further ensure that the diameter 51 of the guide column is not bent.

As one of the specific implementations, there are two bottom sliding assemblies 33 , two sides of the bottom of the second plate 3 and two sides of the bottom of the tail plate 2 are respectively fixedly connected with two sliding feet 331 , and the two sliding surfaces 334 are both inclined inwards In other words, the end of the sliding surface 334 away from the rectangular center 121 is higher, and the end of the rectangular center 121 close to the rectangular center 121 is lower. The clamping structure of the large-tonnage injection molding machine relies on the center of its own weight, which can ensure the injection molding accuracy.

As one of the specific implementations, the two-plate high-pressure oil cylinders 31 are 2N in regular geometric arrangement, and N is an integer greater than or equal to 2. For example, there are four two-plate high-pressure oil cylinders 31 , and the connecting lines of the four two-plate high-pressure oil cylinders 31 are square when viewed axially.

As one of the specific implementations, the diameter of the connecting guide post 5 is 210mm, and the width 122 of the bounding rectangle is 1850mm on the shorter side.

Claims (10)

1. The injection molding machine mold locking structure comprises a tail plate (2), a driving piece (4), a connecting guide column (5) and a fixed head plate (1) provided with an injection molding opening (11); the tail part of the connecting guide post (5) is a clamped section (59) and is provided with a clamping groove; the tail plate (2) is provided with a clamping component (9), and the clamped sections (59) respectively penetrate through the clamping component (9); it is characterized in that the utility model is characterized in that,

when viewed axially, the boundary of the fixed head plate (1) is a boundary rectangle (12), the center of the boundary rectangle (12) is a rectangle center (121), and a horizontal line and a vertical line passing through the rectangle center (121) are respectively a transverse center line (124) and a longitudinal center line (125); the tail plate (2) is positioned in the boundary rectangle (12); the diameter of the connecting guide column (5) is less than fifteen percent of the shorter side of the rectangular center (121); the connecting guide post (5) comprises an outer guide post (52) and an inner guide post (53); the outer guide posts (52) are positioned at four corners of the boundary rectangle (12), and each inner guide post (53) is close to the center (121) of the rectangle relative to the corresponding outer guide post (52); the number of the inner guide posts (53) is integral multiple of four, and the inner guide posts (53) are arranged in mirror symmetry with respect to the transverse center line (124) and the longitudinal center line (125).

2. The mold clamping structure for injection molding machines according to claim 1, wherein the inner guide columns (53) are located at the same level as the outer guide columns (52).

3. The mold clamping structure of the injection molding machine according to claim 2, wherein the width and the length of the boundary rectangle (12) are respectively the width (122) and the length (123) of the boundary rectangle, the width (122) of the boundary rectangle is smaller than the length (123) of the boundary rectangle, and the standing leg (19) is fixedly arranged at the side of the boundary rectangle (123) of the fixed head plate (1).

4. The mold locking structure of the injection molding machine according to claim 2, wherein the fixed head plate (1) is provided with a guide column high-pressure assembly (58), one end of the connecting guide column (5) is positioned in the guide column high-pressure assembly (58), or the guide column high-pressure assembly (58) is arranged on the tail plate (2).

5. The mold clamping structure of an injection molding machine according to claim 1, further comprising two plates (3) and two high pressure oil cylinders (31), wherein the outer guide columns (52) and the inner guide columns (53) penetrate through the two plates (3) respectively; the two-plate high-pressure oil cylinder (31) is respectively connected with the two plates (3) and the fixed head plate (1); the two-plate high-pressure oil cylinder (31) comprises a two-plate high-pressure plunger (311) and a two-plate high-pressure plunger cavity (312); the two-plate high-pressure plunger cavity (312) is arranged in the fixed head plate 1, and the two-plate high-pressure plunger 311 is embedded in the two-plate high-pressure plunger cavity 312.

6. The mold clamping structure of an injection molding machine according to claim 5, wherein the number of the two-plate high-pressure oil cylinders (31) is 2N and the two-plate high-pressure oil cylinders are arranged in a regular geometric manner, and N is an integer of 2 or more.

7. The mold clamping structure of an injection molding machine according to claim 6, wherein the two-plate high-pressure plungers (311) are six and are symmetrically arranged about both the transverse center line (124) and the longitudinal center line (125), and the central two-plate high-pressure plungers (311) have axial lines on the longitudinal center line (125); the rectangle formed by sequentially connecting the axial leads of the four outer two-plate high-pressure plungers (311) is a similar rectangle of the center (121) of the rectangle; the two-plate high-pressure plungers (311) in the middle are respectively positioned between the long sides of the similar rectangle, the horizontal connecting line of the axis of the outer guide column (52) and the axis of the inner guide column (53).

8. The mold locking structure of the injection molding machine according to claim 1, wherein the thickness of the fixed head plate (1) and the thickness of the tail plate (2) are both more than thirty percent of the boundary rectangle (12); when viewed axially, the axial lead of the outer guide post (52) and the rectangular center (121) are the connecting line (54) of the outer guide post, and the axial leads of the inner guide posts (53) are respectively positioned on the connecting line (54) of the outer guide post.

9. The mold clamping structure of an injection molding machine according to claim 8, further comprising two plates (3) and two high pressure oil cylinders (31), wherein the outer guide columns (52) and the inner guide columns (53) penetrate through the two plates (3) respectively; the two-plate high-pressure oil cylinder (31) is respectively connected with the two plates (3) and the tail plate (2); further comprising a bottom slide assembly (33); the bottom sliding component (33) comprises a sliding foot (331) and a sliding foot pad (332); the bottoms of the two plates (3) and the bottom of the tail plate (2) are respectively fixedly connected with a sliding foot (331), and the sliding foot (331) is placed on a sliding foot base plate (332).

10. The mold clamping structure of an injection molding machine according to claim 9, wherein the number of the bottom sliding members (33) is two, and both sides of the bottom of the two plates (3) and both sides of the bottom of the tail plate (2) are fixedly connected with the two sliding legs (331), respectively, and both sliding surfaces (334) are inwardly inclined planes.

Images