CN111391499A

CN111391499A - Transfer printing film fixing device and in-mold thermal transfer printing injection molding equipment with same

Info

Publication number: CN111391499A
Application number: CN202010200733.5A
Authority: CN
Inventors: 罗金城
Original assignee: Dongguan Elma Plastic Technology Co ltd
Current assignee: Dongguan Elma Plastic Technology Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-07-10

Abstract

The invention discloses a transfer printing film fixing device and in-mold thermal transfer printing injection molding equipment with the same, wherein the transfer printing film fixing device comprises a first cross rod, a second cross rod and two vertical plates; the second cross rod is arranged between the two vertical plates, and a transfer printing film coiled into a coil is sleeved outside the second cross rod; the two vertical plates are respectively arranged at two ends of the first cross rod through a monitoring assembly; the two monitoring components are respectively connected with an alarm device arranged on the outer surface of the second cross rod in series through leads, the weight of the transfer film is monitored by the monitoring components, and when the transfer film is nearly used up and becomes light in weight, the monitoring components prompt the alarm device to send out alarm prompt. According to the invention, the power supply loop of the alarm is closed only when the transfer film is used up by arranging and designing the monitoring component, so that the on-duty operators can be reminded in time, the product defect caused by the film running problem is avoided, the production stability and efficiency are improved, and the method is suitable for large-scale popularization and application.

Description

Transfer printing film fixing device and in-mold thermal transfer printing injection molding equipment with same

Technical Field

The invention relates to the technical field of in-mold thermal transfer printing processes, in particular to a transfer printing film fixing device and in-mold thermal transfer printing injection molding equipment with the same.

Background

Thermal transfer printing is a printing process which is about 20 years old in China, and is transferred from abroad to China from the middle of the last 90 th century. Through continuous research and study in the same industry, many new transfer printing technologies, such as in-mold labeling, in-mold thermal transfer printing, vacuum transfer printing, thermal sublimation, water transfer printing, etc., have been derived from the development of thermal transfer printing.

Among them, In-mold thermal transfer (IMR) is a process for completing both injection Molding and surface decoration, and is currently preferred In the printing industry due to its advantages of high automation and low cost In mass production. For example, a plastic back case with a pattern for protection of a mobile phone is manufactured by using an in-mold thermal transfer printing process. In practical production, the plastic rear shell with patterns is manufactured by printing the patterns on a transfer film, then feeding the transfer film into a plastic mold cavity (namely a cavity formed by closing a male mold and a female mold) through an in-mold thermal transfer device (comprising the male mold and the female mold, also called as a movable mold and a static mold) for injection molding, separating an ink layer with the patterns on the transfer film from the transfer film after the injection molding, and transferring the ink layer with the patterns onto the injection molded plastic rear shell, thereby obtaining the plastic rear shell with decorative patterns on the surface. In the above-mentioned whole production process, the transfer of the transfer film is an indispensable and important part, and in particular, in use, the transfer film needs to be mounted on a fixing device which cooperates with the in-mold thermal transfer apparatus to realize the transfer of the transfer film. However, the currently common fixing device is simple in design, and is inconvenient to use, for example, when the transfer film is used up, if an operator on duty does not find the film in time, the film running problem is easily caused, which causes a bad product or machine fault, not only affects the product quality, but also reduces the continuity and efficiency of production, and causes economic loss to manufacturers.

In view of the above, it is particularly necessary to provide a novel transfer film fixing device.

Disclosure of Invention

The invention provides a transfer printing film fixing device and an in-mold thermal transfer printing injection molding device with the same, and aims to overcome the defects in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

in a first aspect, an embodiment of the present invention provides a transfer film fixing device, including a first cross bar, a second cross bar, and two risers;

the second cross rod is arranged between the two vertical plates, and a transfer printing film coiled into a coil is sleeved outside the second cross rod;

the two vertical plates are respectively arranged at two ends of the first cross rod through a monitoring assembly;

the two monitoring components are respectively connected with an alarm device arranged on the outer surface of the second cross rod in series through leads, the weight of the transfer film is monitored by the monitoring components, and when the transfer film is nearly used up and becomes light in weight, the monitoring components prompt the alarm device to send out alarm prompt.

Furthermore, in the transfer film fixing device, the monitoring component comprises a connecting rod arranged between the vertical plate and the first cross rod, a limiting block is arranged at the top of one end, located on the inner side of the lower surface of the first cross rod, of the connecting rod, a moving contact is arranged at one end, far away from the connecting rod, of the limiting block, and a fixed contact is arranged on the inner side of the upper surface of the first cross rod, corresponding to the moving contact;

and a spring for pushing the movable contact to the fixed contact is sleeved on the connecting rod and between the limiting block and the inner side of the lower surface of the first cross rod.

Furthermore, in the transfer film fixing device, the monitoring component comprises a connecting rod arranged between the vertical plate and the first cross rod, a U-shaped limiting block is arranged at the top of one end of the connecting rod, which is positioned on the inner side of the lower surface of the first cross rod, a movable contact is arranged at one end of the U-shaped limiting block, which is far away from the connecting rod, and a stationary contact is arranged on the inner side of the upper surface of the first cross rod, which corresponds to the position of the movable contact;

and springs for pulling the movable contact to the fixed contact are respectively connected between the two ends of the U-shaped limiting block and the inner side of the upper surface of the first cross rod.

Further, in the transfer film fixing device, two ends of the second cross bar are provided with anti-falling limit blocks, and L-shaped grooves matched with the anti-falling limit blocks are formed in the vertical plates.

Further, in the transfer film fixing device, the L-shaped groove has a guide portion and a stopper portion;

when the anti-falling limiting block is installed, the second cross rod enters the limiting part along the guide part of the L-shaped groove and is clamped on the limiting part through the anti-falling limiting block.

Further, in the transfer film fixing device, an anti-slip soft rubber pad is arranged at a position where the limiting part is in contact with the second cross bar.

Further, in the transfer film fixing device, the alarm includes a sound emitting component and a light emitting component;

the sounding component and the light-emitting component are connected in series or in parallel.

Further, in the transfer film fixing device, the movable contact is a bent spring metal sheet, and the stationary contact is a metal sheet with a convex structure.

Further, in the transfer film fixing device, a button switch is further arranged on the outer surface of the second cross bar;

the button switch is connected with the alarm in series.

In a second aspect, an embodiment of the present invention provides an in-mold thermal transfer printing injection molding apparatus, including an injection molding device, a transfer printing film recycling device, and a transfer printing film fixing device as described in the first aspect;

the injection molding device is arranged between the transfer printing film fixing device and the transfer printing film recovery device.

According to the transfer printing film fixing device and the in-mold thermal transfer printing injection molding equipment with the same, the power supply loop of the alarm is closed only when the transfer printing film is used up through the arrangement and design of the monitoring component, so that the on-duty operator can be reminded in time, product badness or machine failure caused by the problem of film leakage is avoided, the stability and continuous production efficiency of in-mold thermal transfer printing production are improved, and the in-mold thermal transfer printing injection molding equipment is suitable for large-scale popularization and application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic structural view of a transfer film fixing apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged view of the area A of FIG. 1;

FIG. 3 is an enlarged view of the area A of FIG. 1;

FIG. 4 is an enlarged view of the area B of FIG. 1;

fig. 5 is a schematic structural diagram of a power supply loop in which an alarm is located according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second cross bar provided in an embodiment of the present invention.

Reference numerals:

the anti-dropping device comprises a first cross bar 10, a second cross bar 20, a vertical plate 30, a weight monitoring component 40, an anti-dropping limiting block 50, an L-shaped groove 60 and an alarm 70;

the connecting rod 41, the limiting block 42, the movable contact 43, the fixed contact 44, the spring 45 and the U-shaped limiting block 46;

a guide portion 61 and a stopper portion 62;

a sound generating component 71 and a light emitting component 72.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

Referring to fig. 1, an embodiment of the invention provides a transfer film fixing device, including a first cross bar 10, a second cross bar 20, and two risers 30;

the second cross bar 20 is arranged between the two vertical plates 30, and a transfer printing film coiled into a coil is sleeved outside the second cross bar;

the two vertical plates 30 are respectively arranged at two ends of the first cross bar 10 through a weight monitoring assembly 40;

two of the weight monitoring assemblies 40 are respectively connected in series with an alarm 70 arranged on the outer surface of the second cross bar 20 through leads, the weight of the transfer film is monitored by the weight monitoring assemblies 40, and when the transfer film is nearly used up and becomes light in weight, the weight monitoring assemblies 40 prompt the alarm 70 to give an alarm prompt.

It should be noted that the innovation point of the present embodiment is that the weight monitoring assembly 40 is added, and the composition structure of the weight monitoring assembly 40 can be various, as long as the weight monitoring can be achieved. For example, the present embodiment describes the specific operation principle of the weight monitoring assembly 40 in detail with two constituent structures thereof.

In a first composition structure, as shown in fig. 2, the weight monitoring assembly 40 includes a connecting rod 41 disposed between the vertical plate 30 and the first rail 10, a limit block 42 is disposed on a top of an end of the connecting rod 41 located inside a lower surface of the first rail 10, a movable contact 43 is disposed on an end of the limit block 42 away from the connecting rod 41, and a fixed contact 44 is disposed on an inner side of an upper surface of the first rail 10 at a position corresponding to the movable contact 43;

a spring 45 (in this case, a compression spring) for pushing the movable contact 43 toward the stationary contact 44 is fitted over the connecting rod 41 and between the stopper 42 and the inner side of the lower surface of the first crossbar 10. When the transfer film on the second rail 20 is reduced, the weight of the transfer film becomes lighter and the weight is increased by the urging force of the pressing spring.

In a second structure, as shown in fig. 3, the weight monitoring assembly 40 includes a connecting rod 41 disposed between the vertical plate 30 and the first rail 10, a U-shaped limiting block 46 is disposed on a top of an end of the connecting rod 41 located inside a lower surface of the first rail 10, a moving contact 43 is disposed on an end of the U-shaped limiting block 46 away from the connecting rod 41, and a stationary contact 44 is disposed inside an upper surface of the first rail 10 at a position corresponding to the moving contact 43;

a spring 45 (in this case, a tension spring) for pulling the movable contact 43 toward the stationary contact 44 is connected between each of both ends of the U-shaped stopper 46 and the inner side of the upper surface of the first rail 10. When the transfer film on the second rail 20 is decreased, the weight of the transfer film becomes lighter and the transfer film is lifted by the tension of the tension spring.

It should be noted that the present embodiment utilizes the fact that the transfer film wound on the second cross bar 20 is less and less in volume and is lighter and lighter, so as to design the monitoring unit 40 capable of driving the movable contact 43 to gradually move toward the fixed contact 44 with the decrease of the residual amount of the transfer film, when the transfer film is nearly used up, the movable contact 43 contacts the fixed contact 44 to close the power supply circuit of the alarm 70, so that the alarm 70 is activated to timely send out the alarm prompt, and the series circuit is as shown in fig. 4.

In order to facilitate the replacement of the used transfer film, it is preferable that the second rail 20 is provided with anti-slip stoppers 50 at both ends thereof, and the riser 30 is formed with L-shaped grooves 60 cooperating with the anti-slip stoppers 50, so that the second rail 20 is easily detached from the riser 30 and the operator easily replaces the transfer film on the second rail 20.

In the present embodiment, the L-shaped groove 60 has a guide portion 61 and a stopper portion 62;

when the second rail 20 is mounted, the second rail enters the stopper 62 along the guide portion 61 of the L-shaped groove 60, and is engaged with the stopper 62 by the anti-falling stopper 50, as shown in fig. 5.

The opening size of the guide portion 61 is larger than the opening size of the stopper portion 62, and is generally set so that the opening size of the guide portion 61 is equal to the size of the anti-slip stopper 50 of the second rail 20, and the opening size of the stopper portion 62 is equal to the size of the second rail 20, so that the anti-slip stopper 50 is not easily removed from the riser 30 when the second rail 20 is positioned at the stopper portion 62.

Preferably, the position where the limiting part 62 contacts with the second cross bar 20 is provided with an anti-skid soft rubber pad.

In the present embodiment, the alarm 70 includes a sound emitting component 71 and a light emitting component 72;

the sound generating component 71 and the light emitting component 72 are connected in series or in parallel.

Specifically, the light emitting element 72 is a light emitting diode or L ED light bulb, and the sound emitting element 71 is a horn or a buzzer.

Considering that the contact between the movable and stationary contacts 44 is rigid, the movable and stationary contacts 44 may be deformed to a certain extent, and thus contact failure may occur, in this embodiment, the movable contact 43 is particularly set as a bent metal sheet of the spring 45 to have a certain deformation recovery capability, and the stationary contact 44 is set as a metal sheet having a convex structure, so that the contact life of the movable and stationary contacts 44 is greatly increased.

Preferably, the outer surface of the second cross bar 20 is further provided with a button switch;

the button switch is connected in series with the alarm 70, and it is possible to control whether the alarm 70 is connected to its power supply loop through the button switch.

According to the transfer printing film fixing device provided by the embodiment of the invention, the power supply loop of the alarm is closed only when the transfer printing film is used up by arranging and designing the monitoring component, so that the on-duty operators can be reminded in time, the product defect or machine fault caused by the film leakage problem is avoided, the stability and continuous production efficiency of in-mold thermal transfer printing production are improved, and the transfer printing film fixing device is suitable for large-scale popularization and application.

Example two

The second embodiment of the invention provides an in-mold thermal transfer printing injection molding device, which comprises an injection molding device, a transfer printing film recovery device and a transfer printing film fixing device according to the first embodiment;

According to the in-mold thermal transfer printing injection molding equipment provided by the embodiment of the invention, the power supply loop of the alarm is closed only when the transfer printing film is used up by arranging and designing the monitoring component, so that the on-duty operators are reminded in time, the product defect or machine fault caused by the film leakage problem is avoided, the stability and continuous production efficiency of in-mold thermal transfer printing production are improved, and the in-mold thermal transfer printing injection molding equipment is suitable for large-scale popularization and application.

The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.

Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.

When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …," "directly engaged with … …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.

Claims

1. A transfer film fixing device is characterized by comprising a first cross bar, a second cross bar and two vertical plates;

2. The transfer film fixing apparatus according to claim 1, wherein the monitoring member includes a connecting rod disposed between the vertical plate and the first rail, a stopper is disposed on a top of an end of the connecting rod located inside a lower surface of the first rail, a movable contact is disposed on an end of the stopper remote from the connecting rod, and a stationary contact is disposed inside an upper surface of the first rail at a position corresponding to the movable contact;

3. The transfer film fixing device according to claim 1, wherein the monitoring member includes a connecting rod disposed between the vertical plate and the first cross rod, a U-shaped stopper is disposed on a top of an end of the connecting rod located inside a lower surface of the first cross rod, a movable contact is disposed on an end of the U-shaped stopper away from the connecting rod, and a stationary contact is disposed inside an upper surface of the first cross rod at a position corresponding to the movable contact;

4. The transfer film fixing device according to claim 1, wherein anti-separation stoppers are provided at both ends of the second cross bar, and L-shaped grooves are formed in the risers to cooperate with the anti-separation stoppers.

5. The transfer film fixing device according to claim 4, wherein the L-shaped groove has a guide portion and a stopper portion;

6. The transfer film fixing device according to claim 1, wherein an anti-slip soft rubber pad is provided at a position where the stopper portion contacts the second cross bar.

7. The transfer film fixing apparatus according to claim 1, wherein the alarm includes a sound emitting component and a light emitting component;

8. The transfer film fixing device according to claim 1, wherein the movable contact is a bent spring metal piece, and the stationary contact is a metal piece having a convex structure.

9. The transfer film fixing device according to claim 1, wherein an outer surface of the second cross bar is further provided with a push switch;

the button switch is connected with the alarm in series.

10. An in-mold thermal transfer printing injection molding device, which is characterized by comprising an injection molding device, a transfer printing film recovery device and a transfer printing film fixing device according to any one of claims 1 to 9;