CN108215066B

CN108215066B - Moving die supporting device of horizontal injection molding machine

Info

Publication number: CN108215066B
Application number: CN201810069805.XA
Authority: CN
Inventors: 刘磊; 田利; 沙涛; 刘凯; 曹晓华; 顾康
Original assignee: Tianjin Tianfeng Auto Parts Co Ltd
Current assignee: Tianjin Tianfeng Auto Parts Co Ltd
Priority date: 2018-01-24
Filing date: 2018-01-24
Publication date: 2020-03-20
Anticipated expiration: 2038-01-24
Also published as: CN108215066A

Abstract

The invention discloses a movable mould supporting device of a horizontal injection molding machine, which is used in the field of injection molding of automobile spare and accessory parts.

Description

Moving die supporting device of horizontal injection molding machine

Technical Field

The invention relates to the field of injection molding of automobile parts, in particular to a movable mold supporting device of a horizontal injection molding machine.

Background

In modern automobile manufacturing, part of parts are manufactured by an injection molding process, and thermoplastic plastics or thermosetting materials are injected into a molding die by an injection molding machine in a molten state by using a principle similar to that of an injector to form plastic parts with various shapes. When processing relatively large parts, a relatively common two-plate horizontal injection molding machine is often adopted. For example, chinese patent No. CN206733467U discloses a horizontal injection molding machine. The general horizontal injection molding machine mainly comprises an injection molding machine frame, a feeding mechanism, a heating injection mechanism, a fixed die fixedly connected with the injection molding machine frame, a movable die slidably connected with the injection molding machine frame, a die closing mechanism and the like. As shown in fig. 1, the movable mold 5 portion generally includes a movable mold fixing plate 51 slidably connected to the injection molding machine frame 4, a movable mold plate 52 fixed to the movable mold fixing plate 51, and a mold release attachment. The fixed mold 6 part comprises a fixed mold fixing plate 61, a fixed mold plate 62 fixed on the fixed mold fixing plate 61, a gate attachment and the like. The movable platen 52 and the stationary platen 62 are brought into abutment with each other to form a casting cavity therebetween. The injection molding machine frame 4 is provided with a pull rod 7 for dragging and supporting the movable mold fixing plate 51, and the injection molding machine frame 4 is generally provided with a slideway 41 for supporting the movable mold fixing plate 51 from the lower part.

When a machined part is large, the size and the weight of the mold plate are large, the structure of the two-plate horizontal injection molding machine is greatly influenced by the action of gravity due to the posture, the movable mold is heavy on the movable mold plate, the movable mold plate is inclined downwards close to one end of the fixed mold, and the mold closing and opening precision is difficult to guarantee. To solve this problem, a support structure is generally provided below the movable platen. For example, chinese patent No. CN201261247Y discloses a movable mold plate supporting structure in a horizontal injection molding machine, wherein a sliding plate capable of moving transversely relative to a frame is arranged below the movable mold plate, one or more independent sliding plates are arranged between the movable mold plate and the sliding plate to support the movable mold plate, and an oil cylinder assembly includes a cylinder body fixedly connected to the lower surface of a fixed mold plate and a piston fixed to the sliding plate. The movable template is pushed upwards by the oil cylinder, so that the influence of the weight of the mold on the railing is offset, and the stable, safe and reliable unlocking and locking of the mold are ensured.

However, with this kind of supporting structure, the force of the friction force generated by the following of the sliding plate will be all acted on the cylinder assembly, the mutual acting force of the cylinder and the piston in the horizontal direction is very large, the contact surface of the cylinder and the piston is very easy to be worn, and the phenomenon of hydraulic pressure leakage in the cylinder assembly is caused.

Disclosure of Invention

The invention aims to provide a movable die supporting device of a horizontal injection molding machine, which can reduce horizontal acting force applied to a hydraulic supporting structure.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a horizontal injection molding machine mould movable mould device, include for the gliding support frame of injection molding machine frame and fix the flexible subassembly of hydraulic pressure on the support frame, the movable mould board is supported to flexible subassembly driven template below, the slip direction of support frame is parallel with the slip direction of movable mould fixed plate, the flexible subassembly setting of hydraulic pressure is kept away from movable mould fixed plate one end at the movable mould board, the support frame is kept away from the one end of the flexible subassembly of hydraulic pressure and is articulated with the movable mould fixed plate, the articulated axis level of support frame just is perpendicular with the slip direction of.

Through adopting above-mentioned technical scheme, the support frame directly links to each other with the movable mould fixed plate, when playing support movable mould board and improving the compound die precision, makes the movable mould move together with the follow-up mould of two parts of the flexible subassembly contact of hydraulic pressure, and the horizontal effort that receives on the flexible subassembly of hydraulic pressure is very little, helps improving the life of the flexible subassembly of hydraulic pressure, and the wearing and tearing of the flexible subassembly of hydraulic pressure after repeated many times are less relatively, also more helps improving the precision of support. Because the pressure that bears on the orbit of movable mould horizontal migration is very big, the straightness accuracy of orbit hardly obtains guaranteeing always, sets up the support frame as articulated, when can guaranteeing support frame bottom slip orbit and the slip orbit nonparallel of movable mould board, the adjustment gesture that the support frame can the adaptability. The bottom of guaranteeing the support frame contacts the injection molding machine frame all the time, avoids appearing cantilever structure, avoids power to concentrate on the junction of movable mould fixed plate and support frame, provides reliable and stable support for hydraulic support subassembly on the one hand, and on the other hand helps protecting strutting arrangement.

Preferably, the support frame comprises a connecting rod connected with the movable mold fixing plate and a support rod connected with the injection molding machine frame, and the support rod is hinged at one end of the connecting rod, which is far away from the movable mold fixing plate; the hinge axes at the two ends of the connecting rod are parallel.

By adopting the technical scheme, when the support frame and the movable die supporting plate rotate relatively, the shape of the support frame structure can be adjusted. The posture of one end of the support frame, which slides relative to the frame of the injection molding machine, is prevented from deflecting, so that the bearing area of the bottom end of the support frame is reduced. The sliding structure between the support frame and the injection molding machine frame is protected, and smooth operation of the sliding process is guaranteed.

Preferably, the support frame further comprises an auxiliary rod, two ends of the auxiliary rod are respectively hinged to the movable mould fixing plate and the support rod, hinge axes at two ends of the auxiliary rod are parallel to hinge axes of the connecting rods, the distance from the hinge axes at two ends of the auxiliary rod to the hinge axes of the adjacent connecting rods is equal, and the distance between the hinge axes at two ends of the auxiliary rod is the same as the distance between the hinge axes at two ends of the connecting rods.

Through adopting above-mentioned technical scheme, set up the auxiliary rod, form parallelogram structure with movable mould fixed plate, bracing piece and connecting rod, guarantee that the support frame takes place to deflect only of bracing piece do the position change, the gesture remains unchanged throughout, further guarantees the contact of support frame and frame, helps protecting the sliding construction between support frame and the injection molding machine frame, guarantees smooth and easy going on of slip process.

Preferably, the hydraulic telescopic assembly is located right above the supporting rod.

By adopting the technical scheme, the pressure born by the hydraulic telescopic assembly can directly act on the rack of the injection molding machine, the unbalance weight on the fixed plate of the movable mold is further reduced, the mold closing and opening precision is improved, and a mold, an injection molding part and the injection molding machine are protected.

Preferably, the connecting rod or the supporting rod is divided into two sections of structures which are connected with each other in a sliding way, and a locking component is arranged between the two sections of structures; when one of the sections slides relative to the other section, the hydraulic telescopic assembly is close to or far away from the movable mould fixed plate.

Through adopting above-mentioned technical scheme, can make the length of connecting rod or bracing piece carry out the adjustment of adaptability, help adapting to the mould of multiple shape, variation in size.

Preferably, the locking assembly comprises a first positioning groove, a second positioning groove and a positioning block which are respectively arranged on the two sections of structures; the second positioning groove comprises a plurality of positioning units arranged along the sliding direction of the adjusting part, the positioning block is inserted into the first positioning groove and one positioning unit at the same time, and the corresponding insertion parts are respectively matched with the shapes of the first positioning groove and the positioning unit.

Through adopting above-mentioned technical scheme, utilize the locating piece to peg graft simultaneously and realize the relative position of both ends structure fixed in first constant head tank and positioning unit, set up a plurality of positioning unit in order to realize that the multiposition is fixed.

Preferably, the positioning units are sequentially provided with a convex part and a concave part in the sliding direction of the adjusting part, and the positioning units of the second positioning groove are communicated and tightly connected with each other.

By adopting the technical scheme, the closely-communicated positioning units can reduce the distance between the adjacent positioning units as far as possible, and the positioning of more stages can be realized in a relatively small length range. The convex part and the concave part are arranged to ensure that the connected positioning units can ensure that the locking block cannot be scraped into the adjacent positioning units.

Preferably, one end of the hydraulic telescopic assembly contacting the movable template is fixedly connected with an elastic pad.

Through adopting above-mentioned technical scheme, set up the cushion and can protect movable mould board and the flexible subassembly of hydraulic pressure on the one hand, on the other hand when the support frame gesture changes, the cushion can guarantee that the area of contact between flexible subassembly of hydraulic pressure and the movable mould board can not take place huge change, guarantees to support stably.

Preferably, the injection molding machine further comprises a sliding assembly arranged between the support frame and the injection molding machine frame, the sliding assembly comprises a sliding rail fixedly connected to the injection molding machine frame and a sliding block fixedly connected to the bottom of the support frame, and the sliding block slides on the sliding rail.

Through adopting above-mentioned technical scheme, the slip subassembly provides reliable and stable slip for the support frame, with the part outside pull rod and the injection molding machine slide of the weight dispersion part of movable mould simultaneously, helps reducing the wearing and tearing of pull rod and slide, reduces pull rod, slide and slide rail and warp, helps improving the precision of movable mould horizontal migration, and then improves the compound die precision.

Preferably, the slide rail is provided with an upper horizontal rail surface and a lower horizontal rail surface, and the upper end and the lower end of the slide block are respectively abutted to the upper rail surface and the lower rail surface.

Through adopting above-mentioned technical scheme, the rail surface about setting up, when guaranteeing that the support frame gesture changes, the slider can use and slide rail contact, guarantees that bearing structure is stable.

In conclusion, the invention has the following beneficial effects:

the mold closing precision is improved; the service life of the hydraulic telescopic assembly is long; the supporting precision is improved; the support frame can be used for adaptively adjusting the posture to adapt to a sliding track with poor straightness; the sliding process is carried out smoothly; is suitable for moulds with different shapes and sizes.

Drawings

FIG. 1 is a schematic view of the structure of an injection molding machine;

FIG. 2 is a schematic view of the position on the injection molding machine in example 1;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a schematic structural view of embodiment 1;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is a sectional view showing an exploded view of the connecting rod in example 1;

FIG. 7 is a sectional view showing a connection part of a slider and a slide rail in embodiment 1;

FIG. 8 is a schematic structural view of embodiment 2;

FIG. 9 is a schematic structural view of embodiment 3;

FIG. 10 is a sectional view showing an exploded view of a connecting rod in example 4;

FIG. 11 is a schematic structural view of example 5.

In the figure, 1, a support frame; 11. a connecting rod; 111. a base portion; 1111. an adjustment groove; 112. an adjustment section; 113. a locking assembly; 1131. a first positioning groove; 1132. a second positioning groove; 1133. positioning blocks; 1134. a convex portion; 1135. a recess; 12. a support bar; 13. an auxiliary lever; 2. a hydraulic telescopic assembly; 21. an elastic pad; 3. a sliding assembly; 31. a slide rail; 311. a chute; 312. a rail mounting surface; 313. a rail surface is arranged; 32. a slider; 4. a frame of an injection molding machine; 41. a slideway; 5. moving the mold; 51. a movable mold fixing plate; 52. moving the template; 6. fixing a mold; 61. fixing a die fixing plate; 62. fixing a template; 7. a pull rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1: because the injection mold of the large-scale injection molding part has large self weight, the movable mold 5 of the horizontal injection molding machine has serious weight bias, and the mold closing precision of the movable mold 5 and the fixed mold 6 is low. In order to solve the problem, as shown in fig. 2, a moving die supporting device of a horizontal injection molding machine is provided, which is combined with fig. 3, and comprises a hydraulic telescopic assembly 2 supporting and offsetting the weight of a moving die plate 52 below a driven die plate 52, a supporting frame 1 supporting the hydraulic telescopic assembly 2 and a sliding assembly 3 ensuring that the supporting frame 1 and a moving die 5 horizontally follow up.

As shown in fig. 4, the hydraulic telescopic assembly 2 is disposed below the movable platen 52 and far away from the movable platen 52, the hydraulic telescopic assembly 2 is fixedly connected to the support frame 1, and the telescopic output end of the hydraulic telescopic assembly is abutted to the lower surface of the movable platen 52. As shown in fig. 5, a rubber elastic pad 21 is fixed on the surface of the telescopic output end contacting with the movable mold 5. The hydraulic telescopic assembly 2 can be set as a hydraulic jack, a hydraulic cylinder and other hydraulic elements.

In order to avoid excessive horizontal component force applied to the hydraulic telescopic assembly 2 during the process of moving along with the movable die 5, the support frame 1 and the movable die fixed plate 51 are connected together. Due to the limitation of the rail material and the processing technology, it is difficult to ensure that the sliding track of the support frame 1 and the sliding track of the movable template 52 are consistent all the time. Therefore, the connection between the support frame 1 and the movable mold fixed plate 51 is set to be hinged, and the hinge axis of the hinge is horizontal and perpendicular to the sliding direction of the movable mold 5.

The supporting bracket 1 includes a supporting rod 12 connected to the sliding assembly 3, a connecting rod 11 hinged to the movable mold fixing plate 51, and an auxiliary rod 13. The connecting rod 11, the supporting rod 12 and the auxiliary rod 13 are all long-strip-shaped rods. The support rod 12 is vertically arranged, and the hydraulic telescopic assembly 2 is fixed at the top of the support rod.

Wherein the support rod 12 is hinged with the connecting rod 11, and the axis of the hinge is horizontal and vertical to the sliding direction of the movable mold 5. When the relative position of the support frame 1 and the movable mold fixing plate 51 changes, the hinge joint between the support rod 12 and the connecting rod 11 ensures that the shape of the support frame 1 can be adjusted adaptively.

The auxiliary rod 13 is disposed right below the connecting rod 11, and both ends of the auxiliary rod 13 are also hinged to the movable mold fixing plate 51 and the supporting rod 12, respectively. The axes hinged at the two ends of the auxiliary rod 13 are horizontal and parallel to each other, and the axes are vertical to the sliding direction of the movable mold 5.

The distance between the two hinged axes on the auxiliary rod 13 is equal to the distance between the two hinged axes on the connecting rod 11. The distance between the two hinged axes of the movable mould fixed plate 51 connected with the support frame 1 is equal to the distance between the two hinged axes of the support rod 12. The auxiliary rod 13, the connecting rod 11, the supporting rod 12 and the movable die fixing plate 51 are formed into a parallelogram structure, so that the supporting rod 12 and the movable die fixing plate 51 can be kept in a parallel and vertical state when the overall shape of the supporting frame 1 is changed.

The connecting rod 11 and the auxiliary rod 13 are identical in structure and shape, and are both of two sections of structures which are fixedly connected with each other in a sliding mode, and the sliding direction is perpendicular to the hinge axis of the connecting rod 11. The distance between the support rod 12 and the movable mold fixing plate 51 is adjusted by such a sliding structure, thereby adapting to the movable mold plates 52 having different shapes and sizes. When adjusting the connecting rod 11, the auxiliary rod 13 is adjusted at the same time to ensure that the parallelogram structure is always unchanged.

Here, the concrete structure of the connecting rod 11 is described as an example. As shown in fig. 4, the connecting rod 11 includes a base portion 111 connected to the movable mold fixing plate 51, an adjusting portion slidably connected to the base portion 111, and a locking block. As shown in fig. 6, an end of the base 111 away from the movable mold fixing plate 51 is formed with an adjustment groove 1111 into which the adjustment part 112 is fitted, and the adjustment part 112 slides in the adjustment groove 1111.

The upper surface of the base portion 111 is provided with a first positioning groove 1131, and the upper surface of the adjusting portion is provided with a second positioning groove 1132. The second positioning groove 1132 includes a plurality of identical positioning units that are uniformly arranged along the sliding direction of the regulating portion 112. One positioning unit of the second positioning groove 1132 has the same shape and size as the first positioning groove 1131, and the projections of the first positioning groove 1131 and one of the positioning units on the upper surface of the base portion 111 can completely coincide with each other. The shape of the positioning block 1133 is matched with the shape of the first positioning groove 1131 and the single positioning unit. The positioning block 1133 is inserted into the first positioning groove 1131 and one of the positioning units. The first positioning groove 1131 may also be configured as a circle, a triangle, or an oval.

Referring back to fig. 3, the slide assembly 3 includes a slide rail 31 fixed to the frame 4 of the injection molding machine and a slide block 32 fixed to the bottom end of the support rod 12. As shown in fig. 7, the slide rail 31 is parallel to the slide rails 41 of the movable mold 5 and is disposed between the two slide rails 41, the cross section of the slide rail 31 is i-shaped, and the top edge and the bottom edge of the groove on the two sides of the i-shaped are respectively and correspondingly disposed as an upper rail surface 312 and a lower rail surface 313 of the slide rail 31. The slider 32 is of an inverted U-shape in cross-section, with the two ends of the U-shape being bent towards each other. The downward end surface of the bent part is respectively abutted against the upper rail surface 312 and the lower cabinet surface.

Before the injection molding machine starts to work, the lengths of the connecting rod 11 and the auxiliary rod 13 are adjusted according to the length of the movable die plate 52, the adjusting part 112 is slid, the hydraulic telescopic assembly 2 is enabled to be close to the position under the end, far away from the movable die fixing plate 51, of the movable die plate 52, and the positioning block 1133 is inserted into the first positioning groove 1131 and a proper positioning unit. The hydraulic telescopic assembly 2 is actuated to bring the telescopic end thereof into abutment with the lower surface of the movable platen 52 and raise it, so that the movable platen 52 is horizontal. After the injection molding machine starts to work, the hydraulic telescopic component 2 keeps a supporting state, and the support frame 1, the hydraulic telescopic component 2 and the slide block 32 move horizontally along with the movable mold 5.

Example 2: the difference from embodiment 1 is that, as shown in fig. 8, the support bar 12 is provided with a horizontal portion which is hinged with the connection bar 11 and the auxiliary bar 13. And the structure for horizontally adjusting the length is transferred from the connecting rod 11 and the auxiliary rod 13 to the horizontal portion of the supporting rod 12.

Example 3: the difference from embodiment 1 is that, as shown in fig. 9, the connecting rod 11 is in an inverted L shape as a whole, and the hydraulic telescopic assembly 2 is fixedly connected to the connecting rod 11 and located right above the slider 32. The auxiliary lever 13 is disposed obliquely.

Example 4: the difference from embodiment 1 is that, as shown in fig. 10, the positioning units of the second positioning groove 1132 are connected, and the bottom surface of the second positioning groove 1132 is formed in a wave shape, and a protrusion 1134 and a recess 1135 are formed in sequence along the sliding direction of the length of the adjustment part 112, and each positioning unit includes a protrusion 1134 and a recess 1135. One side of the positioning block 1133 is provided with a concave-convex structure adapted to the positioning unit.

Example 5: the difference from embodiment 1 is that, as shown in fig. 11, the injection molding machine slide 41 is provided as a slide rail 31. Two sets of support frames 1 and hydraulic telescopic assemblies 2 are arranged to slide on the two slide rails 31 respectively.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a horizontal injection molding machine movable mould strutting arrangement, includes for gliding support frame (1) of injection molding machine frame (4) and fix hydraulic stretching subassembly (2) on support frame (1), hydraulic stretching subassembly (2) driven die board (52) below support movable mould board (52), the slip direction of support frame (1) is parallel with the slip direction of movable mould fixed plate (51), its characterized in that: the hydraulic telescopic component (2) is arranged at one end, far away from the movable mould fixing plate (51), of the movable mould plate (52), one end, far away from the hydraulic telescopic component (2), of the support frame (1) is hinged to the movable mould fixing plate (51), the hinge axis of the support frame (1) is horizontal and perpendicular to the sliding direction of the movable mould (5), the support frame (1) comprises a connecting rod (11) connected with the movable mould fixing plate (51) and a supporting rod (12) connected with the injection molding machine frame (4), and the supporting rod (12) is hinged to one end, far away from the movable mould fixing plate (51), of the connecting rod (11); the hinge axis at connecting rod (11) both ends is parallel, and support frame (1) still includes auxiliary rod (13) that both ends articulate respectively on movable mould fixed plate (51) and bracing piece (12), the hinge axis at auxiliary rod (13) both ends is parallel with the hinge axis of connecting rod (11), and the interval of auxiliary rod (13) both ends hinge axis equals with connecting rod (11) both ends hinge axis interval, and two hinge axis intervals on movable mould fixed plate (51) and bracing piece (12) are equal.

2. The movable mold supporting device of the horizontal injection molding machine according to claim 1, wherein: the hydraulic telescopic assembly (2) is positioned right above the supporting rod (12).

3. The movable mold supporting device of the horizontal injection molding machine according to claim 1, wherein: the connecting rod (11) or the supporting rod (12) is divided into two sections of structures which are connected with each other in a sliding way, and a locking component (113) is arranged between the two sections of structures; when one section slides relative to the other section, the hydraulic telescopic assembly (2) is close to or far away from the movable mould fixed plate (51).

4. The movable mold supporting device of the horizontal injection molding machine according to claim 3, wherein: the locking assembly (113) comprises a positioning block (1133), and a first positioning groove (1131) and a second positioning groove (1132) which are respectively arranged on the two sections of structures; the second positioning groove (1132) comprises a plurality of positioning units arranged along the sliding direction of the adjusting part (112), the positioning block (1133) is simultaneously inserted into the first positioning groove (1131) and one positioning unit, and the corresponding insertion parts are respectively matched with the shapes of the first positioning groove (1131) and the positioning unit.

5. The movable mold supporting device of the horizontal injection molding machine according to claim 4, wherein: the positioning units are sequentially provided with a convex part (1134) and a concave part (1135) in the sliding direction of the adjusting part (112), and the positioning units of the second positioning groove (1132) are communicated and closely connected with each other.

6. The movable mold supporting device of the horizontal injection molding machine according to claim 1, wherein: one end of the hydraulic telescopic component (2) contacting the movable template (52) is fixedly connected with an elastic pad (21).

7. The movable mold supporting device of the horizontal injection molding machine according to claim 1, wherein: still including setting up sliding assembly (3) between support frame (1) and injection molding machine frame (4), sliding assembly (3) include slide rail (31) of rigid coupling on injection molding machine frame (4) and slider (32) of rigid coupling in support frame (1) bottom, slider (32) slide on slide rail (31).

8. The movable mold supporting device of the horizontal injection molding machine according to claim 7, wherein: the sliding rail (31) is provided with a horizontal upper rail surface (312) and a horizontal lower rail surface (313), and the upper end and the lower end of the sliding block (32) are respectively abutted against the upper rail surface (312) and the lower rail surface (313).