Adjustable mold

Abstract

The present invention belongs to the technical field of packaging machinery, and discloses an adjustable mold, comprising: a core mold and a mold unit, wherein the mold unit is arranged around the periphery of the core mold; a guide groove is arranged in the core mold along a first direction; a first group mold unit and a second group mold unit, each group mold unit comprises two mold units, and the first group mold unit and the second group mold unit are slidably connected along a second direction, wherein the first group mold unit is arranged along the first direction with a guide shaft matching the guide groove. The adjustment range is wider.

Description

Technical Field

[0001] The invention belongs to the technical field of packaging machinery, and in particular relates to an adjustable mould. Background Art

[0002] The barrel box is a common type of paper packaging box. It can be used as a wine box, tea box, etc. when combined with a top cover. When the barrel body is formed, a block mold is generally used to facilitate the barrel body forming. In view of the strong versatility and wide application range of the barrel box type, many universal molds have been developed on the market to suit boxes of different sizes.

[0003] For example, a Chinese patent document with publication number CN201415654 discloses a mold with adjustable specifications, including a core mold and mold units located in the four edges of the core mold. A track is provided on the core mold, and the mold units in the four directions are adjustable on the track. The track of this universal mold is fixed on the core mold. The width of the core mold is D1, and the length of the track extending out of the core mold is D2. Then, the adjustment range of the mold unit on the core mold is 0-D1+2*D2. If this mold is to be widened, the length of D2 must be extended, and the width D3 of the mold unit itself is limited. If the width D3 of the mold unit is less than D2, when the mold unit is adjusted to the minimum value, the track will extend outside the mold unit, and the mold function will be lost. The scope of application of this mold is limited. Summary of the invention

[0004] Based on the above background, the technical problem to be solved by the present invention is to provide an adjustable mold with a wider adjustment range.

[0005] Developments of the invention are apparent from the dependent claims as well as from the description and the drawings; the features of the invention, of the developments of the invention and of the exemplary embodiments of the invention also form advantageous developments of the invention in combination with one another.

[0006] Adjustable molds, including:

[0007] A core mold and a mold unit, wherein the mold unit is arranged around the periphery of the core mold;

[0008] A guide groove is provided in the core mold along a first direction;

[0009] The first mold unit and the second mold unit, each mold unit includes two mold units, the first mold unit and the second mold unit are slidably connected along the second direction, wherein the first mold unit is provided with a guide shaft matching the guide groove along the first direction.

[0010] In the solution of the present invention, a guide shaft is provided on the first set of mold units, and a guide groove is provided in the core mold, so that the extended end of the guide shaft can be extended to a length greater than or equal to the length of the guide groove in the core mold. In this way, the width of the mold is not limited, so that the mold has a wider application range. The second set of mold units is adjusted based on the first set of mold units, so that the external force borne by the mold units is dispersed on each mold unit, and it is also a more durable force-bearing structure.

[0011] According to the solution of the present invention, preferably, among the first die unit and the second die unit, one group is provided with a second guide shaft extending along the second direction, and the other group is provided with a guide sleeve along the second direction. In this way, the distance adjustment range between the first die unit and the second die unit is equal to the sum of the second guide shaft and the guide sleeve, and the guide sleeve contributes to the distance between the first die unit and the second die unit in this preferred solution.

[0012] According to the solution of the present invention, it also includes a locking block, which is arranged on the first die unit; and a locking pin matched with the locking block, which is arranged on the second die unit, for locking the target length when adjusting the distance between the first die unit and the second die unit.

[0013] According to the solution of the present invention, it is preferred to further include: a first slide groove, which is arranged on one surface of the core mold; a wedge block assembly, which is arranged in the first slide groove, and includes an active wedge block and a passive wedge block constituting a moving pair, the active wedge block is slidably assembled in the first slide groove, the passive wedge block is provided with the guide groove, and the passive wedge block moves along the second direction; the two active wedge blocks are connected by a screw and move toward each other along the first slide groove. In this way, the movement of the active wedge block in the first slide groove is adjusted by the screw, thereby adjusting the movement of the passive wedge block in the second direction.

[0014] According to the solution of the present invention, it also includes: a second slide groove and a slider, which are arranged on the other surface of the core mold, and the slider is provided with a pusher structure; the second mold unit is provided with an inclined surface and / or a curved surface that matches the pusher structure. In this way, the inclined surface or curved surface on the second mold unit is pushed by the pusher structure to make the two mold units in the second mold unit spread apart, and because the second mold unit is connected to the first mold unit in a one-to-one correspondence, the mold as a whole is spread apart along the first direction, thereby achieving the purpose of adjusting the width in the first direction. Its advantage is that the movement of the slider on the core mold in the second slide groove is converted into a movement that is coplanar with the sliding direction of the second slide groove and perpendicular to the sliding direction.

[0015] According to the solution of the present invention, the inclined plane includes a first inclined plane and a second inclined plane, and the first inclined plane and the second inclined plane are arranged in layers to avoid each other. The inclined planes between the second group of mold units extend toward each other. If they are on the same plane, the two mold units on the second group of mold units will interfere with each other, thereby affecting the minimum value of the mold along the first direction. Therefore, the two inclined planes are arranged in layers. Before the pusher structure pushes the inclined planes, the two inclined planes can overlap and cross-cover to achieve the minimum value, that is, the two mold units are close to the core mold.

[0016] According to the solution of the present invention, it also includes: a tension spring, arranged between two mold units in the second mold unit group along the first direction, a locking slide groove, arranged on the second mold unit group and extending along the first direction; and a locking hole matching the locking slide groove, arranged on the core mold. In this way, it is convenient to always provide a pulling force in the opposite direction through the tension spring, and the locking slide groove can resist the pulling force, thereby also realizing the locking of the mold width in the first direction.

[0017] Compared with the prior art, the adjustable mold provided by the present invention also has the following beneficial effects:

[0018] 1. The different matching methods of the core mold and the mold unit make the adjustment threshold of the overall mold larger and have higher applicability.

[0019] 2. When the mold is adjusted to the minimum value, the contour is not abrupt.

[0020] 3. The overall design of the mold is coordinated and can be fine-tuned.

[0021] 4. The mold locking structure is reasonably distributed, so that the mold will not loosen during work and has good stability.

[0022] 5. The axis structure of the mold is reasonably distributed, and the overall frame can withstand stronger strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the background technology of the present invention;

[0024] Figure 2 A schematic top view of an adjustable mold in an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the left side view of the adjustable mold in the embodiment of the present invention;

[0026] Figure 4 A three-dimensional diagram of a universal mold in an embodiment of the present invention;

[0027] Figure 5 for Figure 4 Y-axis view;

[0028] Figure 6 for Figure 4The universal mold in the figure hides a stereogram of a mold unit;

[0029] Figure 7 This is a structural diagram of another embodiment of the present invention. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example

[0032] like Figure 1 As shown in the accompanying drawings provided by the background technology of the present invention. The core mold 10 is provided with a track 11 extending along the first direction X, and the first group mold unit 20 is provided with a through hole 219. The maximum width of this mold along the X direction is D1+2(D2+D3), and the value range of D2 is usually ≤D3, which is convenient for hiding the length of the track 11 within the outer contour of the mold when the first group mold unit is retracted and moved closer to the core mold 10. The width of the mold unit 20 itself cannot be too large because it is a movable part. Therefore, the maximum adjustment range of this mold along the X direction is limited.

[0033] like Figure 2 As shown, the schematic diagram of the principle of the adjustable mold provided by the present invention. The mold includes a core mold 10 and two groups of mold units, a first group of mold units 21 and a second group of mold units 22, each group including two mold units 20. In the first group of mold units 21, each mold unit 20 is provided with at least one guide shaft 218 extending along the X direction, and a guide groove 12 cooperating with the guide shaft 218 is provided in the core mold 10. Among them, the maximum length D2' of the guide shaft 218 along the X direction is D1, when the two mold units are respectively provided with guide shafts extending toward the core mold 10 on both sides of the core mold, each guide shaft is equipped with an independent guide groove 12. There are two situations for the mold of this structure. One is that the length of D2' does not exceed D1, then the minimum value of the mold is D1+2D3, and the length of D1 is the same. When D1=D2', the maximum width of the mold can reach 3D1+2D3, which is larger than the maximum value of the mold in the background technology; the other is that the length of D2' is greater than D1. When the mold is in a retracted and merged state, the two guide axes are still within the contour range of the mold, and the mold function is not lost.

[0034] like Figure 3 As shown, Figure 3 for Figure 2In a view from another direction, the second mold unit 22 is slidably connected to the first mold unit 21 along the second direction Y. Specifically, preferably, a shaft sleeve 216 is provided in any one group of the second mold unit 22 / the first mold unit 21, and a second guide shaft 217 is provided in the other group, so that the height between the two mold units can be adjusted.

[0035] like Figure 4 As shown, Figure 4 The three-dimensional diagram of the adjustable mold provided by the present invention includes a core mold 10 in the middle and a first group of mold units 21 and a second group of mold units 22 around the core mold. In the field of paper box processing, the mold can be used to make barrel boxes. The main body of the barrel box can be formed by covering the gray board of the barrel box on the mold. For manufacturers, the same box structure products can be processed by the same equipment, which is the lowest cost solution. Therefore, it is an urgent need for manufacturers to make the mold adjustable in height and width.

[0036] like Figure 5 As shown, Figure 5 for Figure 4 The invention also provides an X-direction adjustment scheme for the universal mold.

[0037] A sliding pair, preferably a second slide groove 18 and a slider 14, is provided on one surface of the core mold 10. A pusher structure 15 is provided on the slider. Two inclined surfaces 221 matching the pusher structure 15 are provided on the second mold unit. When the slider 14 moves along the length extension direction of the core mold, the pusher structure 15 will push the two mold units of the second mold unit to spread to both sides along the X direction. Thus, the X-direction width adjustment of the universal mold is realized.

[0038] The pusher structure 15 may be two rollers, each of which cooperates with an inclined surface 221 to adjust the mold unit.

[0039] like Figure 7 As shown, Figure 7 This is a structural diagram of another embodiment of the present invention, in which the push piece structure 15 can be a wedge block, which has two inclined surfaces respectively matched with the two inclined surfaces 221, and the slider 14 and the wedge block can be integrated or separated. When the slider 14 slides, the wedge block can still adjust the mold unit.

[0040] Similarly, it can be understood that the inclined surface 221 can also be a curved surface with the same effect.

[0041] Furthermore, when multiple sets of inclined surfaces 221 are provided, the inclination directions of the inclined surfaces can be mirror images of each other, and multiple sliders can also move away from or close to each other to synchronously push the inclined surfaces, thereby achieving the purpose of adjusting the mold unit.

[0042] Similarly, refer to Figure 5 and Figure 7 , an inclined surface 221 is set on the core mold 10, that is, an inclined surface is set on the slider 14, and the pusher structure 15 is set on the mold units on both sides. When the slider 14 slides in the second slide groove, the pusher structure can still be pushed open to achieve the purpose of adjusting the mold units on both sides.

[0043] Furthermore, in order to reduce the mold units on both sides to the minimum value, when the pusher structure is a roller, a boss 16 is provided on the slider 14, one of the rollers is provided on the boss 16, and the other roller parallel to it is provided under the boss 16; accordingly, the inclined surface 221 on one mold unit is provided on the outer layer to cooperate with the roller on the boss 16, and the inclined surface of the other mold unit opposite to it is provided on the inner layer to cooperate with the roller under the boss, so that the two inclined surfaces can achieve layered avoidance when closing, until the mold units on both sides are close to the core mold, at which time the width in the X direction is the minimum value. When the pusher structure is a wedge block, the wedge block can be thickened as a whole so that the two inclined surfaces can synchronously meet the matching relationship.

[0044] The method of achieving the folding of the mold units on both sides is preferably a tension spring 13, a pin is vertically set on one mold unit, another pin is set in the core mold or in the other opposite mold unit, and a through hole is set in the central core mold. The two ends of the tension spring 13 are respectively connected to the two pins. When the mold units on both sides are stretched, the tension spring is stretched. When the slider slides in the opposite direction, the tension spring recovers its deformation, so that the mold units on both sides are brought closer to the middle. The method of preventing the tension spring from retracting in the embodiment disclosed herein is to set an extension structure with a locking groove 222 on the second group of mold units, and set a lock hole matching the locking groove on the core mold 10. When the mold units are pushed open and spread, the mold units move along the X direction and have a contraction tendency under the action of the tension spring. The locking groove 222 and the lock hole are locked with screws to prevent the tension spring from retracting.

[0045] In some specific embodiments, the X-direction adjustment of the mold unit is not directly opened manually, but requires fine adjustment with the help of a mechanical structure. When the locking state of the mold unit is cancelled, the mold unit is adjusted to a more accurate length along the X-direction through an adjustment tool. A specific embodiment is provided herein, in which a bolt adjustment structure 17 is provided at one end of the slider 14 along the length direction of the core mold, and the bolt adjustment structure is fine-tuned through a thread.

[0046] In some prior art, the first mold unit 21 and the second mold unit 22 are configured to slide on the core mold in the Y direction. Such a configuration results in the minimum value of the mold in the Y direction being the thickness of the core mold plus the thickness of the mold units on both sides. The range of such a mold is also smaller. Thanks to the connection method of the two mold units in the present invention, the second mold unit 22 is directly connected to the first mold unit 21 through an axial sliding structure. This connection method avoids the thickness of the core mold, so that the sum of the thicknesses of the two can be less than or equal to the thickness of the core mold.

[0047] like Figure 6 As shown, the present invention also provides a locking method for two sets of mold units along the Y direction, and cleverly uses the space reserved by the shaft slide to set a locking pin structure 30 to achieve the Y-direction locking of the two sets of mold units. According to this embodiment, a locking pin is set on either side of the two sets of mold units, and a locking block is set on the other side. The locking block has a through hole that matches the locking pin, and the locking block can be locked by means of a screw.

[0048] According to one of the above embodiments, after a sliding pair and a slide groove are used on one surface of the core mold 10 to realize active adjustment of the mold unit in the X direction, a slide groove and a sliding pair are also preferably used on the other surface of the core mold 10 to realize adjustment of the mold unit in the Y direction, because the development cost and processing cost are relatively low.

[0049] For example, a first slide groove 19 is provided on the other surface of the core mold 10 , and a moving pair is provided in the first slide groove, wherein the guide groove 12 and the guide shaft 218 on the first mold assembly unit 21 are provided in the moving pair.

[0050] The moving pair can convert the moving direction in the first slide groove 19 into the movement of the mold unit in the Y direction by means of a wedge assembly, thereby realizing the adjustment of the first group of mold units 21. Specifically, an active wedge 192 and a passive wedge 191 are provided in the first slide groove 19, and the inclined surfaces of the two are in complementary contact. The passive wedge 191 is provided with a guide groove 12, and the active wedge 192 slides along the first slide groove 19, and squeezes the other inclined surface upward through the inclined surface.

[0051] Furthermore, in this embodiment, in order to make the adjustment of the wedge block assembly more convenient, the inventor sets two active wedge blocks 192 in the first slide groove 19, sandwiches a passive wedge block 191, and then fine-tunes the distance between the two active wedge blocks 192 through another bolt adjustment structure. The bolt adjustment structure has the same function as in the above embodiment, and will not be repeated here.

[0052] When the passive wedge 191 moves upward, it drives the first die unit 21 upward. When the first die unit needs to move downward, the passive wedge 191 can be directly pressed to move downward by releasing the bolt adjustment structure. In this embodiment, the inventor uses another bolt to penetrate the center of the passive wedge 191 along the Y direction, so that the Y direction of the passive wedge 191 can be precisely fine-tuned.

[0053] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. Adjustable mold, characterized by ,include: A core mold and a mold unit, wherein the mold unit is arranged around the periphery of the core mold; A guide groove is provided in the core mold along a first direction; A first mold unit and a second mold unit, each mold unit comprises two mold units, the first mold unit and the second mold unit are slidably connected along the second direction, wherein the first mold unit is provided with a guide shaft matching the guide groove along the first direction; and further comprising: A first slide groove is provided on one surface of the core mold; A wedge block assembly is arranged in the first slide groove, comprising an active wedge block and a passive wedge block constituting a moving pair, wherein the active wedge block is slidably assembled in the first slide groove, the passive wedge block is provided with the guide groove, and the passive wedge block moves along the second direction; the two active wedge blocks are connected by a screw and move toward each other along the first slide groove; A second slide groove and a slider are arranged on the other surface of the core mold, and a pusher structure is arranged on the slider; The second group of mold units is provided with an inclined surface and / or a curved surface that matches the push piece structure; A tension spring is arranged between two mold units in the second group of mold units along a first direction, A locking slide groove, provided on the second group of mold units and extending along the first direction; A locking hole matching the locking slide groove is arranged on the core mold.

2. The adjustable mold according to claim 1, characterized in that: Among the first group of mold units and the second group of mold units, one group is provided with a second mold unit extending along the second direction. The guide shaft and the other group are provided with a guide shaft sleeve along the second direction.

3. The adjustable mold according to claim 2, characterized in that: Also includes: A locking block, provided on the first group of mold units; A locking pin matched with the locking block is arranged on the second group of mold units.

4. The adjustable mold according to claim 1, characterized in that: The inclined plane includes a first inclined plane and a second inclined plane, and the first inclined plane and the second inclined plane are arranged in layers to avoid each other.

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