CN212979226U

CN212979226U - Demoulding device for shell-shaped dental instrument hot-pressing film forming process

Info

Publication number: CN212979226U
Application number: CN202021475883.9U
Authority: CN
Inventors: 郑轶刊; 王猛
Original assignee: Shanghai Angel Align Medical Instrument Co ltd
Current assignee: Shanghai Angel Align Medical Instrument Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-04-16
Anticipated expiration: 2030-07-23

Abstract

An aspect of the utility model provides a shedder of shelly dental appliance hot pressing membrane forming technology, it includes: the demolding device comprises a base and four demolding components, wherein the demolding components are arranged on the base and distributed on the lingual side and the buccal side of the posterior tooth area on two sides of a tooth model in place in pairs respectively, the demolding components are hook-shaped, the hook-shaped tail ends of the demolding components face the tooth model, the demolding components are rotatably arranged on the base, and the demolding device further comprises first springs which are arranged corresponding to each demolding component and used for pushing the corresponding demolding component to the tooth model so that the hook-shaped tail ends of the demolding components are abutted against the tooth model. The utility model discloses a shedder has the drawing of patterns efficient, not fragile shelly dental appliance's advantage.

Description

Demoulding device for shell-shaped dental instrument hot-pressing film forming process

Technical Field

The utility model relates to a shedder of shelly dental appliance hot pressing membrane shaping manufacturing technology on the whole.

Background

Shell-like dental appliances based on polymeric materials (e.g., shell orthodontic appliances and shell retainers) are becoming increasingly popular because of their aesthetic, convenient, and cleaning benefits.

The most common manufacturing process of shell-shaped dental appliances in the industry is a hot-pressing film forming process, and the basic operation is to press a film on a tooth model by applying positive pressure or negative pressure to form a heated high polymer material film, remove the formed negative model from the tooth model after cooling, cut the negative model to remove redundant parts, and obtain the finished shell-shaped dental appliance.

At present, the most common demolding method still comprises that a worker inserts a crowbar into a gap between the appliance and the dental cast and pries the crowbar out by using a lever principle.

However, the inventors of the present application have found that this demolding method has the following disadvantages: firstly, the crowbar can only tilt up a certain local area of the appliance, and other areas are clamped more tightly due to the deformation of the appliance under stress, so that the smooth demoulding of the whole appliance cannot be ensured; secondly, because the mould is not easy to be released, an operator can easily apply excessive force, and the appliance can be deformed irreversibly to influence the correction effect, and sometimes the appliance can be damaged by excessive force; thirdly, the demoulding method is time-consuming and labor-consuming, which is not beneficial to improving the production efficiency.

A Chinese patent invention, entitled demolding method of bracket-free invisible orthodontic appliance, which is issued on 5, 8 and 2019 as No. CN105686888B, discloses a demolding method. The method comprises the steps of arranging demoulding holes in pairs on a tooth model, respectively inserting two clamp mouths of a special demoulding hook clamp into the pair of demoulding holes, hooking an appliance diaphragm, and pulling the appliance diaphragm in a direction far away from the tooth model to separate the appliance diaphragm from the tooth model. However, the inventor of the present application finds that, on one hand, the method may cause the corresponding position of the membrane and the small hole to be recessed into the hole during hot press molding, which may affect the correction effect; on the other hand, when demoulding, the clamp mouth is required to be accurately inserted into the demoulding hole, the operation requirement of workers is high, and the efficiency is not high.

Another demolding method is disclosed in chinese patent publication No. CN109808157A entitled "demolding apparatus, demolding method and one-stop facing production system", which is issued 11/2/2018. The automatic transfer device is controlled by the control device to move so that the open end of the tooth socket loaded on the automatic transfer device is contacted with the membrane prying end, and the control device controls the automatic transfer device and the membrane prying piece to move relatively to generate membrane prying force to pry the tooth socket from the tooth jaw model. Although this system achieves automated stripping of the braces from the dental model, the inventors of the present application have found that this method of stripping, which is essentially similar to manual use of crowbars, still suffers from the disadvantages of not being able to guarantee smooth stripping and possibly irreparable deformation of the appliance.

In view of the above, there is a need to provide a new demolding device.

SUMMERY OF THE UTILITY MODEL

An aspect of the utility model provides a shedder of shelly dental appliance hot pressing membrane forming technology, it includes: the demoulding components are arranged on the base and distributed on the lingual side and the buccal side of the posterior tooth area on two sides of the in-place tooth model in pairs respectively.

In some embodiments, the demolding device may further include two additional demolding components respectively disposed on the lingual side and the labial side of the anterior tooth area of the seated tooth model.

In some embodiments, the demolding component may be hook-shaped with its hook-shaped end facing the tooth model.

In some embodiments, the stripper members may be rotatably mounted to the base, and the stripper device further comprises a first spring disposed in association with each of the stripper members to urge the associated stripper member toward the tooth model with the hooked end thereof abutting the tooth model.

In some embodiments, the top of the stripper assembly near the hooked end may be angled to form a guide so that the dental model can be pushed aside during the approach of the base, guiding the dental model into position to be stripped.

In some embodiments, the demolding device may further include a fixed bracket and a movable bracket disposed corresponding to each demolding assembly, wherein the fixed bracket is fixedly mounted on the base, the movable bracket is slidably mounted on the corresponding fixed bracket along the demolding direction, the demolding assembly is rotatably and slidably mounted on the corresponding movable bracket along a direction perpendicular to the demolding direction, and the first spring is mounted between the movable bracket and the demolding assembly.

In some embodiments, the demolding device may further include a second spring disposed between each movable bracket and the corresponding fixed bracket to push the movable bracket toward the tooth model in the demolding direction.

In some embodiments, the demolding device may further include a driving mechanism for controlling relative movement between the tooth model and the base in a demolding direction to achieve demolding.

In some embodiments, the relative position of the stripper assembly and the base is adjustable.

The utility model discloses a shedder of shelly dental appliance hot pressing membrane forming process can realize the drawing of patterns better to be difficult for destroying shelly dental appliance during the drawing of patterns.

Drawings

The above and other features of the present application will be further explained with reference to the accompanying drawings and detailed description thereof. It is appreciated that these drawings depict only several exemplary embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope. The drawings are not necessarily to scale and wherein like reference numerals refer to like parts, unless otherwise specified.

FIG. 1 schematically illustrates a demolding device for a hot-pressing film forming process of a shell-shaped dental appliance in one embodiment of the present application;

FIG. 2A schematically illustrates the mounting relationship between the stripper assembly and the force applying mechanism in one embodiment of the present application;

FIG. 2B schematically illustrates the mounting relationship between the stripper assembly and the movable bracket in one embodiment of the present application; and

FIG. 3 schematically illustrates the positional relationship of the stripper assembly with the tooth model and shell-like dental appliances thereon, with the tooth model in place, according to one embodiment of the present application.

Detailed Description

The following detailed description refers to the accompanying drawings, which form a part of this specification. The exemplary embodiments mentioned in the description and the drawings are only for illustrative purposes and are not intended to limit the scope of the present application. Those skilled in the art, having benefit of this disclosure, will appreciate that many other embodiments can be devised which do not depart from the spirit and scope of the present application. It should be understood that the aspects of the present application, as described and illustrated herein, may be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are within the scope of the present application.

In order to solve the problems existing in the existing demoulding scheme, the application provides a demoulding device for a shell-shaped dental appliance hot-pressing film forming process.

Referring to fig. 1, a demolding device 100 for a shell-shaped dental appliance thermoforming process in one embodiment of the present application is schematically illustrated.

In one embodiment, in the hot-pressing film forming process for manufacturing the shell-shaped dental appliance, a heated polymer film is pressed and formed on a tooth model by applying positive pressure or negative pressure to obtain a negative model, and after cooling, the negative model is cut to remove an excess part to obtain the shell-shaped dental appliance, and then the shell-shaped dental appliance is taken off from the tooth model (i.e., demoulding).

The demolding apparatus 100 includes a base 101 and a plurality of demolding assemblies 103, wherein the base 101 is used for fixedly mounting the demolding assemblies 103. It will be appreciated in light of the present disclosure that base 101 may be any shape and configuration that provides support for stripper assembly 103.

In the case of no missing tooth, the teeth of a complete dentition (upper jaw or lower jaw) are bilaterally symmetric along the tooth centerline, i.e., the teeth on both sides of the tooth centerline are the same, and hereinafter, for convenience of description, the tooth model 105 is divided into left and right sides with the tooth centerline as a center line, and correspondingly, the shell-shaped dental appliance may be divided into left and right sides with the tooth centerline as a center line.

In this embodiment, two sets of 6 mold release assemblies 103 are disposed on the base 101, the two sets of mold release assemblies 103 are respectively disposed on two opposite sides, and each set corresponds to one of the back teeth areas on the left and right sides of the tooth model 105, so that the force can be simultaneously applied to the left and right sides of the shell-shaped dental appliance on the tooth model 105, and the mold release is more smooth. It will be appreciated from the teachings of the present application that if force is applied to only one of the left and right sides of the shell-like dental implement, the other side may remain on the dental model 105 after demolding, and thus, simultaneous application of force to both the left and right sides of the shell-like dental implement may ensure more smooth demolding.

Each of the plurality of stripper members 103 is disposed on opposite sides of the lingual and buccal sides. In this embodiment, 2 of each set of 3 stripper elements 103 are on the buccal side and the remaining 1 is on the lingual side. The position of the stripper assembly 103 on the lingual side along the curvature of the dental arch is between the opposite positions of the two stripper assemblies 103 on the buccal side along the curvature of the dental arch. The demoulding components are arranged on the tongue side and the cheek side, so that the tongue side and the cheek side are stressed simultaneously when the shell-shaped dental appliance is demoulded, the demoulding force is relatively uniformly distributed on the two sides instead of being concentrated on one side, and the shell-shaped dental appliance is not easy to be damaged due to overlarge local stress during demoulding.

It will be appreciated that the number of stripper units in each set is not limited to 3, and may be 2 or 4, etc. arranged opposite each other, and the positions of the stripper units on both sides of the tongue along the arch curve may be the same or slightly offset.

Under the enlightenment of this application, can understand, except that tooth district sets up drawing of patterns subassembly behind corresponding both sides, can also set up at least a set of drawing of patterns subassembly before corresponding, like this, can be to tooth district and the three regional application of force simultaneously in preceding tooth district behind shell dental appliance both sides during the drawing of patterns, further guarantee going on smoothly of drawing of patterns.

Referring to fig. 2A, the installation relationship of the stripper assembly 103 and the force applying mechanism 107 in one embodiment of the present application is schematically illustrated.

In this embodiment, stripper assembly 103 is hook-shaped, and force applying mechanism 107 is spring-actuated stripper assembly 103 so that the tip of its hook portion is held tightly against tooth model 105, thereby enabling hooking of the shell-like dental implement on tooth model 105.

The biasing mechanism 107 includes a fixed bracket 1071, a movable bracket 1073,

vertical springs

1075a and 1075b, and

horizontal springs

1077a and 1077 b.

Wherein, fixed bolster 1071 is fixed mounting on base 101, and movable support 1073 is installed in fixed bolster 1071 vertically movably, and drawing of patterns subassembly 103 is rotatable and can install in movable support 1073 horizontally movably.

Referring again to fig. 2B, the mounting relationship of stripper assembly 103 and movable support 1073 is schematically illustrated in one embodiment of the present application.

The movable holder 1073 forms a U-shaped groove 1073a having one end opened in the extending direction of the U-shaped groove 1073a and the other end closed by a support wall 1073 b. Sliders 1073c are formed on both sides of the supporting wall 1073b, and sliders 1073d are formed on both side walls of the U-shaped groove 1073a and slidably received in the sliding

grooves

1071a and 1071b on both sides of the fixed bracket 1071, respectively, so that the movable bracket 1073 can slide up and down in the vertical direction.

Sliding grooves 1073e are formed on both side walls of the movable holder 1073, and the pin 1031 of the knock out module 103 is housed in the sliding grooves 1073e so as to be slidable and rotatable, so that the knock out module 103 can rotate and slide back and forth with respect to the movable holder 1073.

Vertical springs

1075a and 1075b are arranged below the movable support 1073 to provide upward thrust for the movable support 1073, and the

sliders

1073c and 1073d of the movable support 1073 are respectively positioned at the top ends of the sliding

grooves

1071a and 1071b in the original state due to the action of the

vertical springs

1075a and 1075 b.

Horizontal springs

1077a and 1077b are provided on the support wall 1073b for urging the stripper assembly 103 toward the tooth model.

The portion of the top of stripper assembly 103 adjacent the hook tip forms a guide 1033 that slopes downwardly toward the hook tip portion, and when the dental model is pushed in from above, the dental model slides along guide 1033, squeezing stripper assembly 103 outwardly until the dental model is moved into position, at which time the hook tip of stripper assembly 103 is held tightly against the dental model and over the rim of the shell-like dental appliance on the dental model.

Referring to fig. 3, which schematically illustrates the positional relationship of the stripper assembly 103 and the tooth model 105 with the shell-like dental appliances 109 thereon after the tooth model 105 is in place in one embodiment of the present application, fig. 3 is a view along the curvature of the dental arch.

Before the demolding operation, the tooth model 105 is positioned above the demolding assembly 103, and during demolding, the tooth model 105 is pressed down until the edge of the shell-shaped dental implement 109 thereon is positioned below the demolding assembly 103, and then the tooth model 105 is lifted up, during which the demolding assembly 103 hooks the edge of the shell-shaped dental implement 109, and when the tooth model 105 is further lifted up, the demolding assemblies 103 on both tongue and cheek sides pull the shell-shaped dental implement 109 off the tooth model 105, thereby completing demolding.

In a preferred embodiment, the base 101 is positioned below and the tooth model to be demolded 105 is positioned above, both moving relative to each other in a vertical direction to complete the demold. It will be appreciated in the light of the present application that the relative position and relative direction of movement between the base 101 and the tooth model 105 to be demolded are not limited to the above-described embodiments, and for example, the base 101 may be located above and the tooth model 105 to be demolded below, and for example, both may be tilted at an angle, so that the demolding direction is also correspondingly tilted at that angle, no longer in the vertical direction.

In the above embodiment, the demolding device 100 is held stationary, and demolding is accomplished by controlling the movement of the tooth model 105 with the apparatus. It will be appreciated in the light of the present application that demolding is accomplished by relative movement between the dental model 105 and the demolding apparatus 100, and thus, in addition to the foregoing, demolding may be accomplished by holding the dental model 105 stationary, by controlling the movement of the demolding apparatus 100 with the device, or by controlling both relative movements with the device.

It will be appreciated in light of the present application that other suitable configurations for the stripper assembly, such as crowbar-like, may be used in addition to the hook-like configuration.

It will be appreciated that other control mechanisms, such as hydraulic, pneumatic, and electric mechanisms, may be used to control the stripper assembly in addition to the spring biasing.

In one embodiment, to allow the demolding device 100 to accommodate dental arches of different sizes and shapes, the relative position between the demolding assembly 103 and the base 101 is adjustable, e.g., the mounting position of the fixing bracket 1071 on the base 101 is adjustable, or, in the case where the demolding assembly 103 is driven electrically, hydraulically, pneumatically, etc., these driving mechanisms can drive the demolding assembly 103 to move within a larger range to accommodate dental arches of different sizes and shapes.

While various aspects and embodiments of the disclosure are disclosed herein, other aspects and embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification. The various aspects and embodiments disclosed herein are for purposes of illustration only and are not intended to be limiting. The scope and spirit of the application are to be determined only by the claims appended hereto.

Likewise, the various diagrams may illustrate an exemplary architecture or other configuration of the disclosed methods and systems that is useful for understanding the features and functionality that may be included in the disclosed methods and systems. The claimed subject matter is not limited to the exemplary architectures or configurations shown, but rather, the desired features can be implemented using a variety of alternative architectures and configurations. In addition, to the extent that flow diagrams, functional descriptions, and method claims do not follow, the order in which the blocks are presented should not be limited to the various embodiments which perform the recited functions in the same order, unless the context clearly dictates otherwise.

Unless otherwise expressly stated, the terms and phrases used herein, and variations thereof, are to be construed as open-ended as opposed to limiting. In some instances, the presence of an extensible term or phrases such as "one or more," "at least," "but not limited to," or other similar terms should not be construed as intended or required to imply a narrowing in instances where such extensible terms may not be present.

Claims

1. The utility model provides a shedder of shelly dental appliance hot pressing membrane forming technology which characterized in that, it includes: the demoulding components are arranged on the base and distributed on the lingual side and the buccal side of the posterior tooth area on two sides of the in-place tooth model in pairs respectively.

2. The demolding device as claimed in claim 1, further comprising two additional demolding members respectively disposed on lingual and labial sides of the anterior tooth area of said seated tooth model.

3. The demolding device as claimed in claim 1 or 2, wherein said demolding member is hook-shaped with a hook-shaped end thereof facing said tooth model.

4. The demolding device as claimed in claim 3, wherein said demolding member is rotatably mounted to said base, said demolding device further comprising a first spring provided in correspondence with each of said demolding members for urging the corresponding demolding member toward said tooth model with its hooked end abutting against said tooth model.

5. The demolding device as claimed in claim 4, wherein the demolding assembly top portion is inclined to form a guide portion near the hook-shaped end portion, so that the tooth model can be pushed aside by the demolding assembly in the process of approaching the base, and the tooth model is guided to be in a position to be demolded.

6. The ejector apparatus of claim 4, further comprising a fixed bracket and a movable bracket disposed in correspondence with each of said ejector assemblies, wherein said fixed bracket is fixedly mounted to said base, said movable bracket is slidably mounted to the corresponding fixed bracket in the ejecting direction, said ejector assembly is rotatably and slidably mounted to the corresponding movable bracket in a direction perpendicular to said ejecting direction, and said first spring is mounted between said movable bracket and said ejector assembly.

7. The demolding device as claimed in claim 6, further comprising a second spring provided between each movable bracket and the corresponding fixed bracket, for urging said movable bracket toward said tooth model in said demolding direction.

8. The demolding apparatus as claimed in claim 1 or 2, further comprising a driving mechanism for controlling a relative movement between said tooth model and said base in a demolding direction to effect demolding.

9. The demolding apparatus as claimed in claim 1 or 2, wherein a relative position of said demolding assembly to said base is adjustable.