Adjustable mold locking structure for injection molding

Abstract

The utility model discloses an adjustable mold locking structure for injection molding, which belongs to the technical field of injection molding equipment and comprises a fixed seat, a movable plate, a mold locking rod, a driving seat and a supporting block, connecting rods are fixedly mounted at four corners of the fixed seat, the mold locking rod is of a fan-shaped structure, the other end of the mold locking rod is a cambered surface, and the shape of the cambered surface conforms to a logarithmic spiral. By means of the design of the fine adjustment assembly and the mold locking rod, dynamic adjustment of the mold locking structure is achieved, the problem that adjustment is inaccurate due to distance changes generated when a movable mold is replaced is effectively solved, the mold locking structure is simple in structure and convenient to operate, and the mold locking structure is suitable for large-scale popularization and application. The mold locking structure is suitable for movable molds and combined molds with different thicknesses, the logarithmic spiral cambered surface design is carried out on the mold locking rod, it can be ensured that the mold locking force is always kept in the horizontal direction in the adjusting process, mechanical self-locking is achieved, the strength of the mold locking structure is improved, it is ensured that the applied mold locking force is sufficient, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection molding equipment technical field, especially provide a adjustable injection molding locking structure. BACKGROUND

[0002] In the field of injection molding equipment, the adjustability of the locking structure is a key factor affecting production efficiency and product quality. The locking structure is large in size, so it is inconvenient to adjust. When replacing the mold, in order to provide sufficient locking force, it needs to be adjusted accurately, and the overall operation is complicated. If the adjustment is not accurate, the locking structure may not be straight when the mold is closed, and the mechanical self-locking condition cannot be reached, or the locking force is insufficient. If the self-locking condition is not reached, the fatigue and wear of the key components will be accelerated, and even the failure of rupture or deformation will occur. If the locking force is insufficient, the huge injection pressure during injection molding will open the mold, forming flash, causing the product to be scrapped or increasing the subsequent processing cost, and also easily causing insufficient internal pressure of the mold, resulting in quality defects such as shrinkage and incomplete filling, which seriously affects the product size accuracy and mechanical strength. SUMMARY

[0003] To solve the above problems, the utility model provides a adjustable injection molding locking structure.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of: a adjustable injection molding locking structure, including fixed base, moving plate, locking rod, driving seat and supporting block, the four corners of the fixed base are all fixedly installed with connecting rods, and the moving plate is movably assembled on the connecting rods, the inner walls of the fixed base and the moving plate are all fixedly installed with mounting seats, one end of the locking rod is hingedly assembled on the mounting seats, the locking rod is a fan-shaped structure, the other end of the locking rod is an arc surface, and the shape of the arc surface conforms to a logarithmic spiral, the length of the lower surface of the locking rod is greater than the length of the upper surface, the middle part of the fixed base is movably assembled with the driving seat, the upper and lower surfaces of the driving seat are all fixedly installed with supporting hydraulic cylinders, and the supporting block is fixedly installed on the output end of the supporting hydraulic cylinders, and the supporting block is assembled between the two locking rods.

[0005] Further, an arc-shaped groove is formed in the front surface of the locking rod, and the shape of the arc-shaped groove is the same as that of the arc-shaped surface.

[0006] Further, the front and rear surfaces of the locking rod are integrally formed with reinforcing ribs.

[0007] Further, the middle part of the fixed base is fixedly installed with a driving hydraulic cylinder, and the driving seat is fixedly installed on the output end of the driving hydraulic cylinder, and the upper and lower surfaces of the driving seat are all fixedly installed with fine adjustment assemblies corresponding to the locking rod.

[0008] Further, the middle part of the fixing seat is fixedly installed with guide rods on the left and right sides, the both sides of the driving seat are provided with guide holes, and the driving seat is movably assembled on the guide rods through the guide holes.

[0009] Further, the fine adjustment assembly comprises a fine adjustment hydraulic cylinder, the fine adjustment hydraulic cylinder is fixedly installed on the upper and lower surfaces of the driving seat, the output end of the fine adjustment hydraulic cylinder is fixedly installed with a push plate, the both ends of the push plate are integrally formed with side plates, a limiting rope is fixedly installed between the two side plates, and the limiting rope passes through the arc-shaped groove.

[0010] Further, the support block is a T-shaped structure composed of a horizontal rod and a vertical rod, the vertical rod is fixedly installed on the output end of the support hydraulic cylinder, the horizontal rod of the support block is provided with a through groove on the left and right ends, a transmission rod is fixedly installed on the inner wall of the through groove, and the transmission rod passes through the arc-shaped groove.

[0011] Further, the inner wall of the through groove is an arc surface matched with the arc surface.

[0012] The beneficial effects of the utility model are as follows:

[0013] The utility model discloses a fine adjustment assembly and a locking rod, realizes the dynamic adjustment of the locking structure, effectively solves the inaccurate adjustment problem caused by the distance change of the replacement of the movable die, and makes the locking structure applicable to movable dies of different thicknesses and the die closing.

[0014] The logarithmic spiral arc surface is designed on the locking rod, can ensure that the locking force always keeps horizontal during the adjustment process, realizes mechanical self-locking, increases the strength of the locking rod, guarantees the sufficiency of the applied locking force, and improves the service life. DRAWINGS

[0015] Fig. 1 It is one of the three-dimensional schematic views of the utility model.

[0016] Fig. 2 It is the second three-dimensional schematic view of the utility model.

[0017] Fig. 3 It is the front view of the plane where the support block center is located.

[0018] Fig. 4 It is the three-dimensional schematic view of the locking rod of the utility model.

[0019] Fig. 5 It is the three-dimensional schematic view of the fine adjustment assembly of the utility model.

[0020] The reference signs include: 1, fixed seat, 11, mounting seat, 12, guide rod, 2, connecting rod, 3, moving plate, 4, locking rod, 41, arc surface, 42, arc groove, 43, reinforcing rib, 5, driving seat, 51, driving hydraulic cylinder, 52, supporting hydraulic cylinder, 53, fine adjustment assembly, 531, fine adjustment hydraulic cylinder, 532, push plate, 533, limiting rope, 6, supporting block, 61, transmission rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] REFERENCE Figs. 1 to 5 The utility model discloses a locking structure for injection molding, which comprises a fixed seat 1, a moving plate 3, a locking rod 4, a driving seat 5 and a supporting block 6. The fixed seat 1 is provided with a connecting rod 2 at each corner, and the moving plate 3 is movably assembled on the connecting rod 2. The inner walls of the fixed seat 1 and the moving plate 3 are both fixedly provided with a mounting seat 11. One end of the locking rod 4 is hingedly assembled on the mounting seat 11. The locking rod 4 is in a fan shape, and the other end of the locking rod 4 is an arc surface. The shape of the arc surface conforms to a logarithmic spiral. The length of the lower surface of the locking rod 4 is greater than the length of the upper surface. The middle part of the fixed seat 1 is movably provided with the driving seat 5. The upper and lower surfaces of the driving seat 5 are both fixedly provided with a supporting hydraulic cylinder 52. The supporting block 6 is fixedly installed on the output end of the supporting hydraulic cylinder 52. The supporting block 6 is assembled between the two locking rods 4.

[0023] The device is only the locking structure of the injection molding device, and is a schematic diagram of the main structure. A slide rail can be arranged below the moving plate 3. The length of the connecting rod 2 is longer, and the other end is connected to a fixed plate. The fixed plate is provided with a fixed mold. The moving plate 3 is provided with a movable mold. The locking structure is used to push the movable mold and the fixed mold to complete the clamping of the movable mold and the fixed mold and provide sufficient locking force.

[0024] In normal times, the driving seat 5 is located close to the fixed seat 1. The locking rod 4 is deflected inward. The output end of the supporting hydraulic cylinder 52 is retracted to a specific position, so that the supporting block 6 does not limit the deflection of the locking rod 4. At this time, the moving plate 3 is located close to the fixed seat 1, and the movable mold and the fixed mold are separated. When clamping, the driving seat 5 moves to the right side, and at the same time, the output end of the supporting hydraulic cylinder 52 is elongated. The supporting block 6 is gradually moved to the set position, and at the same time, the locking rod 4 is gradually deflected outward. The moving plate 3 is pushed to move, and the clamping work is completed. At this time, the horizontal pressure on the movable mold is formed by the locking rod 4 and the supporting block 6, that is, the locking force, so that the subsequent injection molding work is smoothly and effectively completed.

[0025] The mold locking rod 4 is designed as a fan-shaped structure, and the curved surface is designed as a logarithmic spiral, and the pole point of the logarithmic spiral is located on the rotating shaft of the mold locking rod 4. According to the characteristics of the logarithmic spiral, when the mold locking rod 4 is deflected, the tangent direction at the contact position between the outer end surface of the mold locking rod 4 and the support block 6 is unchanged. Therefore, the set position of the support block 6 should be located on the inner side of the mounting seat 11, so that the tangent direction at the contact position between the support block 6 and the mold locking rod 4 is a vertical surface, thereby obtaining a horizontal mold locking force for the movable mold, and realizing a mechanical self-locking state of the mold locking rod 4.

[0026] In addition, the set position of the support block 6 can also be arranged to be horizontal to the mounting seat 11, and at this time, the tangent direction at the contact position between the support block 6 and the mold locking rod 4 is in a state of vertical micro-deviation. In this case, the vertical component force is offset by the action of the support hydraulic cylinder 52, and the horizontal component force forms the mold locking force.

[0027] Since the mold locking rod 4 is in a mechanical self-locking state of only receiving horizontal force in the above two cases, the stability of the mold locking force can be ensured, the damage to the equipment is reduced, and the service life is improved.

[0028] Due to the characteristics of the logarithmic spiral, the length of the lower surface of the mold locking rod 4 is greater than the length of the upper surface. Therefore, when the mold locking rod 4 is pushed to deflect outward, the moving plate 3 will continue to be pushed to move, and the mold clamping or mold locking force supplement work is completed, and the process can always maintain a mechanical self-locking state.

[0029] Specifically, as shown in Fig. 4 the front surface of the mold locking rod 4 is provided with an arc-shaped groove 42, and the shape of the arc-shaped groove 42 is the same as that of the arc-shaped surface 41, so that the arc-shaped groove 42 is also in the shape of a logarithmic spiral, and cooperates with the transmission rod 61 on the support block 6 to generate a horizontal mold locking force.

[0030] Specifically, the front and rear surfaces of the mold locking rod 4 are integrally formed with reinforcing ribs 43.

[0031] The reinforcing ribs 43 are distributed in a fan shape and are in the same direction as the mold locking force, thereby increasing the strength of the mold locking rod 4.

[0032] Specifically, the middle part of the fixed seat 1 is fixedly installed with guide rods 12 on the left and right sides, and the both sides of the driving seat 5 are provided with guide holes, and the driving seat 5 is movably assembled on the guide rods 12 through the guide holes.

[0033] Specifically, as shown in Figs. 1 to 3 the middle part of the fixed seat 1 is fixedly installed with a driving hydraulic cylinder 51, and the driving seat 5 is fixedly installed on the output end of the driving hydraulic cylinder 51, and the upper and lower surfaces of the driving seat 5 are fixedly installed with fine adjustment assemblies 53 corresponding to the mold locking rod 4.

[0034] The active seat 5 is moved by the active hydraulic cylinder 51, and during the clamping process, the active seat 5 is moved while the supporting hydraulic cylinder 52 is also elongated, and the two are matched to adjust the position of the supporting block 6, and simultaneously drive the mold locking rod 4 to unfold.

[0035] The deflection angle of the mold locking rod 4 is adjusted by the fine adjustment assembly 53.

[0036] Specifically, as shown in Fig. 5 The fine adjustment assembly 53 includes a fine adjustment hydraulic cylinder 531, which is fixedly installed on the upper and lower surfaces of the active seat 5. The output end of the fine adjustment hydraulic cylinder 531 is fixedly installed with a push plate 532, both ends of the push plate 532 are integrally formed with side plates, a limiting rope 533 is fixedly installed between the two side plates, and the limiting rope 533 passes through the arc-shaped groove 42.

[0037] When the supporting block 6 reaches the set position, if the clamping work is not completed or the clamping force is insufficient, the fine adjustment hydraulic cylinder 531 operates to push the mold locking rod 4 to deflect outward. Due to the design of the logarithmic spiral on the mold locking rod 4, when the mold locking rod 4 moves outward, the effective acting length increases, thereby pushing the moving plate 3 to move, so that the clamping work is successfully completed or the clamping force is supplemented.

[0038] The limiting rope 533 is an elastic rope, which helps to lift the lower mold locking rod 4 when the mold is opened, so that the lower mold locking rod 4 does not hinder the movement of the moving plate 3. In practice, the function of the limiting rope 533 can be realized by other mechanical transmission structures.

[0039] Specifically, as shown in Fig. 3 The supporting block 6 is a T-shaped structure composed of a horizontal rod and a vertical rod, and the vertical rod is fixedly installed on the output end of the supporting hydraulic cylinder 52. The horizontal rod of the supporting block 5 is provided with a through groove at both ends, and a transmission rod 61 is fixedly installed on the inner wall of the through groove, and the transmission rod 61 passes through the arc-shaped groove 42.

[0040] Specifically, the inner wall of the through groove is an arc surface matched with the arc surface 41, so that the contact between the supporting block 6 and the mold locking rod 4 is surface contact, which improves stability and reduces damage to the mold locking rod 4 and the supporting block 6.

[0041] The supporting block 6 is provided to transmit the clamping force through the supporting block 6, and the purpose of setting the position of the supporting block 6 is to enable the mold locking rod 4 to be in a mechanical self-locking state during subsequent deflection of the mold locking rod 4.

[0042] The corner of the mold locking rod 4 in contact with the supporting block 6 is chamfered, and when the mold locking rod 4 deflects inward, the supporting block 6 can rotate relative to the chamfered corner of the mold locking rod 4, thereby preventing the mold locking rod 4 and the supporting block 6 from interfering with each other during contraction.

[0043] The adjustable mold locking structure for injection molding, when the mold is closed, the active hydraulic cylinder 51 drives the active seat 5 to move to the right, and the supporting hydraulic cylinder 52 drives the supporting block 6 to move outward, so that the mold locking rod 4 is unfolded and drives the moving plate 3 to move to the right to complete the mold closing; for different thickness of the movable mold, the deflection angle of the mold locking rod 4 can be adjusted through the fine adjustment assembly 53, and under the premise that the mold locking rod 4 is in the mechanical self-locking state, the moving plate 3 is moved again to complete the mold closing work and the mold locking force work under the condition of the thinner movable mold;

[0044] When the mold is opened, the output end of the fine adjustment assembly 53 is moved back, the mold locking rod 4 is reset through the limiting rope 533, then the active hydraulic cylinder 51 drives the active seat 5 to reset, and the supporting hydraulic cylinder 52 drives the supporting block 6 to reset, the mold locking rod 4 is retracted, the moving plate 3 and the movable mold are away from the fixed mold, and then the injection molded workpiece can be taken out.

[0045] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, many changes can be made in the specific implementation mode and application range, as long as these changes do not deviate from the concept of the present application, and all belong to the protection scope of the present application.

Claims

1. An adjustable clamp structure for injection molding, characterized by: The utility model provides a mould locking device, including fixed seat, moving plate, lock mode pole, initiative seat and support block, four corners of fixed seat all fixedly installed have connecting rod, and moving plate moves assembly on connecting rod, the inner wall of fixed seat and moving plate all fixedly installed have mounting seat, a plurality of mounting seat all hinged assembly has one end of lock mode pole, the lock mode pole is sector structure, and the other end of lock mode pole is cambered surface, and the shape of cambered surface accords with logarithmic spiral, the lower surface length of lock mode pole is greater than the upper surface length, the middle part of fixed seat moves assembly has initiative seat, the upper and lower surfaces of initiative seat all fixedly installed have support hydraulic cylinder, and support block fixedly installed is in the output of support hydraulic cylinder, support block assembly is between two lock mode poles.

2. The adjustable mold locking structure for injection molding as claimed in claim 1, wherein: The front surface outer end of the lock mode pole is provided with an arc-shaped groove, and the shape of the arc-shaped groove is the same as that of the arc-shaped surface.

3. The adjustable mold locking structure for injection molding according to claim 2, wherein: The front and rear surfaces of the lock mode pole are integrally formed with reinforcing ribs.

4. The adjustable mold locking structure for injection molding as recited in claim 2, wherein: The middle part of the fixed seat is fixedly installed with an initiative hydraulic cylinder, and the initiative seat is fixedly installed at the output end of the initiative hydraulic cylinder.

5. The adjustable mold locking structure for injection molding as recited in claim 4, wherein: The left and right sides of the middle part of the fixed seat are fixedly installed with guide rods, and the two sides of the initiative seat are provided with guide holes, and the initiative seat is movably assembled on the guide rods through the guide holes.

6. The adjustable mold locking structure for injection molding as recited in claim 4, wherein: The fine adjustment assembly includes a fine adjustment hydraulic cylinder, and the fine adjustment hydraulic cylinder is fixedly installed on the upper and lower surfaces of the initiative seat.

7. The adjustable mold locking structure for injection molding as recited in claim 2, wherein: The support block is a T-shaped structure composed of a horizontal rod and a vertical rod, and the vertical rod is fixedly installed at the output end of the support hydraulic cylinder.

8. The adjustable mold locking structure for injection molding according to claim 7, wherein: The left and right ends of the horizontal rod of the support block are provided with through grooves, and the inner walls of the through grooves are fixedly installed with transmission rods, and the transmission rods pass through the arc-shaped groove. The inner wall of the through groove is an arc surface matched with the arc surface. The inner wall of the through groove is an arc surface matched with the arc surface.

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