CN-116214783-B - Method and system for demolding appliance

CN116214783BCN 116214783 BCN116214783 BCN 116214783BCN-116214783-B

Abstract

The invention discloses a method and a system for demolding an appliance, and belongs to the technical field of medical instrument manufacturing. The appliance demolding method comprises the steps of drilling a medium placement hole from a first plane of a dental model along a first direction at a plurality of preset drilling positions, enabling the medium placement Kong Qiahao to penetrate the dental model, filling centrifugal medium into the medium placement hole, enabling the centrifugal medium to move in the first direction in the medium placement hole at least when centrifugal movement occurs and pass through the medium placement hole, sealing the medium placement hole, enabling the centrifugal medium to be kept in the medium placement hole, conducting centrifugal operation on the dental model, enabling the centrifugal medium to act on the appliance along the first direction under the action of centrifugal force, and enabling the appliance to be separated from the dental model. The demolding system is constructed according to a demolding method. The invention can realize the demolding of the appliance under the condition of less damage to the appliance, and improves the demolding quality.

Inventors

LIU DAPENG
ZHENG YANFANG
HU WEILONG
ZHENG LEI
TANG YUAN

Assignees

上海麦牙科技有限公司
上海微云实业集团有限公司

Dates

Publication Date: 20260508
Application Date: 20221229

Claims (9)

1. A method of removing an appliance from a dental model, the appliance and the dental model comprising a dental model assembly, comprising: Drilling medium placing holes along a first direction from a first plane of the dental model at a plurality of preset drilling positions, wherein the medium placing holes Kong Qiahao penetrate through the dental model; Filling centrifugal media in the media placement holes, wherein the centrifugal media are water, fine sand or metal balls, and the centrifugal media can move in the media placement holes along a first direction at least when centrifugal movement occurs and can pass through the media placement holes; Sealing the media receiving aperture, the centrifugal media being retainable in the media receiving aperture; And (3) centrifuging the dental module, wherein the centrifugal medium flexibly acts on the appliance along the first direction through the medium accommodating hole under the action of centrifugal force so as to separate the appliance from the dental model.
2. The method of claim 1, wherein the predetermined number of drilling locations are at least at locations where tooth deformation is greater than a deformation threshold.
3. The method of claim 2, further comprising predetermining a number of borehole locations, the determining the number of borehole locations comprising: identifying dental model information, the dental model information being associated with a corresponding digital model in a database; And carrying out deviation analysis according to the digital model of the dental model and the standard digital model, and if the deviation value is greater than the deformation threshold, the position is a drilling position.
4. The method of claim 1, wherein the drilling location is further located at a molar location, the number of drilling at the molar location being determined based on the number of teeth.
5. The method of claim 1, further comprising determining the drilling depth from a digital model corresponding to the dental model.
6. The method of claim 5, wherein the centrifugation is performed at a speed greater than 4000RPM.
7. An appliance ejection system for ejecting an appliance from a dental model, the appliance and the dental model comprising a dental model assembly, comprising: the drilling device is used for drilling medium placing holes along a first direction from a first plane of the dental model at a plurality of preset drilling positions, and the medium placing Kong Qiahao penetrates through the dental model; the injection device is used for filling centrifugal media in the media placement hole, the centrifugal media are water, fine sand or metal balls, and the centrifugal media can move in the first direction in the media placement hole at least when centrifugal movement occurs and can pass through the media placement hole; A hole sealing device for sealing the medium accommodating hole, wherein the centrifugal medium can be held in the medium accommodating hole; The centrifugal device is used for performing centrifugal operation on the dental module, and the centrifugal medium flexibly acts on the appliance along the first direction through the medium placing hole under the action of centrifugal force so as to separate the appliance from the dental model; And the control device is connected with the drilling device, the injection device, the hole sealing device and the centrifugal device and is used for controlling the devices to execute corresponding operations.
8. The system of claim 7, further comprising: the identification device is used for identifying dental model information, and the dental model information is related to a corresponding dental digital model in the database; And the database is used for storing tooth digital models of all stages of the orthodontic process.
9. The system of claim 8, wherein the control device retrieves a corresponding digital model of the tooth from the database based on the dental model information, performs a deviation analysis based on the digital model of the dental model and the standard digital model, and determines the location as a drilling location if the deviation value is greater than the deformation threshold.

Description

Method and system for demolding appliance Technical Field The invention belongs to the technical field of medical instrument manufacturing, and particularly relates to a method and a system for demolding an appliance, which are used for demolding in the manufacturing process of a shell-shaped invisible appliance. Background Shell-shaped dental appliances based on polymeric materials are currently widely used in the field of dental orthodontics. The manufacturing process of the shell-shaped appliance comprises the procedures of obtaining a digital model of teeth of a patient, 3D printing the dental model, cleaning and curing, hot pressing the diaphragm, cutting edges, separating the appliance, cleaning, checking and packaging and the like. The process of separating the appliance has great influence on the quality and efficiency of the product. There are currently mainly the following techniques for the demolding of shell-shaped appliances: (1) And (5) manually demolding. The cut appliance is manually pulled off directly from the dental model, which is a more common way in the current appliance manufacturing process. Or by hand demolding with the aid of a tool. In this way, the operator will use a small tool, such as a small crowbar, to pry the appliance from the dental model using lever principles. In addition, in patent application publication CN105686888a, entitled "method of demolding of a bracket-free invisible appliance", a demolding method is disclosed, in which demolding holes are formed in pairs in a tooth model (dental model), two jaws of a special demolding hook pliers are respectively inserted into a pair of demolding holes, and after the appliance film is hooked, the appliance film is pulled away from the tooth model to be separated from the tooth model. (2) Patent application publication number CN109808157a entitled "stripping apparatus, stripping method, and one-stop dental mouthpiece production system" discloses an automated stripping apparatus and a method for stripping using the same. The device includes controlling means, automatic transfer device, the transmission tray and the drawing of patterns module of setting at automatic transfer device free end, the drawing of patterns module is equipped with the sled membrane spare, sled membrane spare is equipped with sled membrane end, can load the tooth jaw model that has the facing (appliance) of preparing the drawing of patterns on the transmission tray, controlling means control automatic transfer device moves the open end and the sled membrane end contact of the facing that make its loading, controlling means control automatic transfer device and sled membrane spare relative motion produce sled membrane power with the facing sled down from tooth jaw model, realized the automatic stripping of facing and tooth jaw model. The technical proposal in the patent adopts a principle similar to that of a manual prying film, but is designed into automatic equipment according to the principle so as to realize automatic demolding. (3) In the patent document with publication number of CN212979226U, the name of the demolding device of the hot-press film forming process of the shell-shaped dental appliance is provided, the device comprises a base and four demolding assemblies, the demolding assemblies are arranged on the base and distributed on the lingual side and the buccal side of the back teeth area on two sides of the tooth model respectively, the demolding assemblies are in the shape of hooks, the hooked ends of the demolding assemblies face the tooth model, the demolding assemblies are rotatably arranged on the base, and the demolding device further comprises a first spring which is arranged corresponding to each demolding assembly and pushes the corresponding demolding assembly towards the tooth model so that the hooked ends of the demolding assemblies are propped against the tooth model. The principle of the technical solution disclosed in the patent is similar to that of the technical solution disclosed in CN105686888A, and the appliance is pulled down from the dental model by adopting a pulling mode. (4) Patent application publication number CN113440284a, entitled "demolding method of shell dental appliance hot-press film forming manufacturing process and tooth model" discloses a demolding method, in which a tooth model (dental model) is related, on which a weakened area is formed, which is destroyed to form a through hole so that a push rod can pass through the through hole to push a negative model molded on the tooth model away from the tooth model. In demolding, the weakened area of the tooth model is destroyed to form a through hole for the push rod to pass through, and the negative model molded on the tooth model is pushed away from the tooth model by the push rod from the through hole. (5) The patent application document with the publication number of CN107081897A discloses a demolding method and a demolding system for an appliance, wherein