阅读说明：本技术 一种医疗器械外壳吹塑工艺 (Blow molding process for medical instrument shell ) 是由 段平泉 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种医疗器械外壳吹塑工艺,涉及医疗器械技术领域,具体为医疗器械外壳吹塑工艺包括下述操作步骤：S1、原料熔融；S2、操作准备；S3、吹塑成型；S4、端口切断和S5、冷却成型。该医疗器械外壳吹塑工艺,通过在切断时设置撑形件于胶质料吹塑成型后的筒身内部的端口部位,使得筒身端口部位被撑起,从而使得切断部位不会发生塌陷,且冷却时始终保持抵于胶质料2-5摄氏度的风冷方式进行冷却,避免胶质料成型后因温差过大骤冷而发生破损或收缩变形,从而提高冷却速度的同时保障胶质料成型为筒外壳时的完好度,也就是提高工作效率的同时保障产品质量。(The invention discloses a medical instrument shell blow molding process, which relates to the technical field of medical instruments, in particular to a medical instrument shell blow molding process, which comprises the following operation steps: s1, melting the raw materials; s2, operation preparation; s3, blow molding; s4, cutting the port and S5, and cooling and forming. This medical instrument shell blow molding process, through set up the port position of propping the piece in barrel body inside behind the plastic blow molding when cutting off for barrel body port position is propped up, thereby makes the position of cutting off can not take place to sink, and keeps supporting in the forced air cooling mode of plastic material 2-5 degrees centigrade all the time during the cooling and cools off, takes place damage or shrinkage deformation because of the too big shock chilling of difference in temperature after avoiding the plastic material shaping, thereby guarantee the integrity when the plastic material shaping is barrel shell when improving cooling speed, guarantee product quality when also improving work efficiency.)

1. A medical instrument shell blow molding process is characterized in that: the blow molding process of the medical device shell comprises the following operation steps:

s1, melting raw materials:

heating and melting the raw materials into a colloidal material, and wrapping the colloidal material to one end of a hollow rod, wherein the other end of the hollow rod is externally connected with a gas injection device;

s2, operation preparation:

an outer pipe is sleeved outside the hollow rod, one end of the hollow rod carries a colloid material and extends into the innermost part of the forming cavity, the end part of the outer pipe is in a square shape, and the side surface of the outer pipe is connected with a knife switch in a sliding manner;

s3, blow molding:

the air injection equipment blows air in the hollow rod to enable the colloid material to expand like a balloon, but the shape of the colloid material in expansion is limited by the forming cavity, and meanwhile, the hollow rod slowly exits from the inside of the forming cavity to enable the colloid material to expand and form along the inside of the forming cavity;

s4, port disconnection:

the outer pipe is attached to the outer surface of the molding cavity while the hollow rod exits from the molding cavity, the side surface of the outer pipe shields a gap between the inner opening of the molding cavity and the outer wall of the hollow rod, and after the hollow rod completely exits from the inside of the molding cavity, the switch blade slides downwards to cut off the connection of the outer colloidal material in the molding cavity;

s5, cooling and forming:

the outside parcel in shaping chamber has the wind chamber, different heating chambers are connected to the wind chamber, the heating chamber heats the outside air, the heating temperature diverse nevertheless by high low range, set up temperature sensor in each heating chamber and shaping intracavity portion simultaneously, control inside temperature is less than each heating chamber and the independent intercommunication in wind chamber that becomes the inside temperature of shaping intracavity all the time, and make the inside air flow in wind chamber cool down to shaping intracavity portion, with adding a piece colloid material cooling solidification speed.

2. The medical device housing blow molding process according to claim 1, wherein: in the step S1, the hollow rod is a hollow straight rod, and one end of the hollow rod contacting the colloidal material is in the shape of an injection needle.

3. The medical device housing blow molding process according to claim 1, wherein: and in the step S3, the inside of the forming cavity is in a straight cylinder shape, and a thread groove is arranged at the part, close to the feed inlet, of the inside of the forming cavity.

4. The medical device housing blow molding process according to claim 1, wherein: in the step S2, the hollow rod and the outer tube are slidably connected, and the central axes of the hollow rod and the outer tube coincide with each other.

5. The medical device housing blow molding process according to claim 1, wherein: in the step S4, one end of the outer tube, which is attached to the outer surface of the molding cavity, is in a square sheet shape, and a supporting piece is arranged at the feeding port of the molding cavity after the hollow rod completely exits the inside of the molding cavity, and the supporting piece supports the hollow rod from the inner wall of the rubber material, so that the rubber material is prevented from being stressed and sunken when the switch blade slides downwards to be cut off.

6. The medical device housing blow molding process according to claim 5, wherein: when the knife switch slides down and is cut off, the knife switch slides down along the outer surface of the forming cavity, so that the end part of the cut colloid material is flush with the surface of the forming cavity.

7. The medical device housing blow molding process according to claim 5, wherein: the outer opening structure of the supporting piece is matched with the inner opening structure of the forming cavity.

8. The medical device housing blow molding process according to claim 1, wherein: and in the step S5, the air cavity is communicated with the heating chamber which is always lower than the molding cavity according to the internal temperature of the molding cavity, the internal temperature of the air cavity is always lower than the internal temperature of the molding cavity by 2-5 ℃, and the air cavity finishes air flow when the internal temperature of the molding cavity is cooled to room temperature.

9. The process of blow molding a medical device housing according to any one of claims 1 to 8, wherein: the blow molding process of the medical instrument shell is applied to the field of production and application of medical handheld flashlight shells.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a blow molding process for a shell of a medical instrument.

Background

The medical handheld flashlight is small in size and convenient to carry, the shell of the medical handheld flashlight is divided into two parts, namely the barrel body and the lamp holder which are used for holding, the two parts are in threaded connection, the battery is convenient to replace through convenient disassembly and assembly, the medical handheld flashlight illuminates when being used for checking the inside of the ear, the nose and the throat, and the medical handheld flashlight plays a role in facilitating observation of medical staff.

The shell part of the cylinder body of the traditional medical handheld flashlight body is molded by adopting a blow molding process, but the traditional medical handheld flashlight body can only adopt natural cooling after being molded, and the cooling mode with too high temperature difference can cause deformation shrinkage or cracking due to quenching.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a medical instrument shell blow molding process, which solves the problems that the shell part of the traditional medical handheld flashlight body is molded by adopting a blow molding process, but only natural cooling can be adopted after the molding, and the cooling mode with too high temperature difference can cause deformation shrinkage or cracking due to quenching.

In order to achieve the purpose, the invention is realized by the following technical scheme: a medical device housing blow molding process comprising the following operating steps:

s1, melting raw materials:

heating and melting the raw materials into a colloidal material, and wrapping the colloidal material to one end of a hollow rod, wherein the other end of the hollow rod is externally connected with a gas injection device;

s2, operation preparation:

an outer pipe is sleeved outside the hollow rod, one end of the hollow rod carries a colloid material and extends into the innermost part of the forming cavity, the end part of the outer pipe is in a square shape, and the side surface of the outer pipe is connected with a knife switch in a sliding manner;

s3, blow molding:

the air injection equipment blows air in the hollow rod to enable the colloid material to expand like a balloon, but the shape of the colloid material in expansion is limited by the forming cavity, and meanwhile, the hollow rod slowly exits from the inside of the forming cavity to enable the colloid material to expand and form along the inside of the forming cavity;

s4, port disconnection:

the outer pipe is attached to the outer surface of the molding cavity while the hollow rod exits from the molding cavity, the side surface of the outer pipe shields a gap between the inner opening of the molding cavity and the outer wall of the hollow rod, and after the hollow rod completely exits from the inside of the molding cavity, the switch blade slides downwards to cut off the connection of the outer colloidal material in the molding cavity;

s5, cooling and forming:

the outside parcel in shaping chamber has the wind chamber, different heating chambers are connected to the wind chamber, the heating chamber heats the outside air, the heating temperature diverse nevertheless by high low range, set up temperature sensor in each heating chamber and shaping intracavity portion simultaneously, control inside temperature is less than each heating chamber and the independent intercommunication in wind chamber that becomes the inside temperature of shaping intracavity all the time, and make the inside air flow in wind chamber cool down to shaping intracavity portion, with adding a piece colloid material cooling solidification speed.

Optionally, in the step S1, the hollow rod is a hollow straight rod, and one end of the hollow rod contacting the colloidal material is in the shape of an injection needle.

Optionally, in the step S3, the inside of the molding cavity is in a straight cylinder shape, and a thread groove is formed in a position close to the feed inlet in the molding cavity.

Optionally, in the step S2, the hollow rod and the outer tube are slidably connected, and central axes of the hollow rod and the outer tube coincide with each other.

Optionally, in the step S4, one end of the outer tube, which is attached to the outer surface of the molding cavity, is in a square sheet shape, and a supporting member is placed at the feeding port of the molding cavity after the hollow rod completely exits from the inside of the molding cavity, and the supporting member supports the hollow rod from the inner wall of the rubber material, so that the rubber material is prevented from being depressed when the knife is slid down and cut off.

Optionally, the knife switch slides down and slides down along the outer surface of the molding cavity when being cut off, so that the end of the cut-off colloid material is flush with the surface of the molding cavity.

Optionally, the outer opening structure of the supporting piece is adapted to the inner opening structure of the forming cavity.

Optionally, in the step S5, the air cavity is communicated with the heating chamber always lower than the molding cavity according to the internal temperature of the molding cavity, the internal temperature of the air cavity is always lower than the internal temperature of the molding cavity by 2-5 degrees celsius, and the air cavity finishes air flow when the internal temperature of the molding cavity is cooled to room temperature.

Optionally, the medical instrument shell blow molding process is applied to the field of production and application of medical handheld flashlight shells.

The invention provides a medical instrument shell blow molding process, which has the following beneficial effects:

this medical instrument shell blow molding process, through set up the port position of propping the piece in barrel body inside behind the plastic blow molding when cutting off for barrel body port position is propped up, thereby makes the position of cutting off can not take place to sink, and keeps supporting in the forced air cooling mode of plastic material 2-5 degrees centigrade all the time during the cooling and cools off, takes place damage or shrinkage deformation because of the too big shock chilling of difference in temperature after avoiding the plastic material shaping, thereby guarantee the integrity when the plastic material shaping is barrel shell when improving cooling speed, guarantee product quality when also improving work efficiency.

Drawings

Fig. 1 is a schematic view of a barrel shell structure of a medical handheld flashlight.

Detailed Description

Referring to fig. 1, the present invention provides a technical solution: a medical device shell blow molding process comprises the following operation steps:

s1, melting raw materials:

heating and melting the raw materials into a colloidal material, and wrapping the colloidal material to one end of a hollow rod, wherein the other end of the hollow rod is externally connected with a gas injection device;

s2, operation preparation:

an outer pipe is sleeved outside the hollow rod, one end of the hollow rod carries a colloid material and extends into the innermost part of the forming cavity, the end part of the outer pipe is in a square shape, and the side surface of the outer pipe is connected with a knife switch in a sliding manner;

s3, blow molding:

the air injection equipment blows air in the hollow rod to enable the colloid material to expand like a balloon, but the shape of the colloid material in expansion is limited by the forming cavity, and meanwhile, the hollow rod slowly exits from the inside of the forming cavity to enable the colloid material to expand and form along the inside of the forming cavity;

s4, port disconnection:

the outer pipe is attached to the outer surface of the molding cavity while the hollow rod exits from the molding cavity, the side surface of the outer pipe shields a gap between the inner opening of the molding cavity and the outer wall of the hollow rod, and after the hollow rod completely exits from the inside of the molding cavity, the switch blade slides downwards to cut off the connection of the outer colloidal material in the molding cavity;

s5, cooling and forming:

the outside parcel in shaping chamber has the wind chamber, different heating chambers are connected to the wind chamber, the heating chamber heats the outside air, the heating temperature diverse nevertheless by high low range, set up temperature sensor in each heating chamber and shaping intracavity portion simultaneously, control inside temperature is less than each heating chamber and the independent intercommunication in wind chamber that becomes the inside temperature of shaping intracavity all the time, and make the inside air flow in wind chamber cool down to shaping intracavity portion, with adding a piece colloid material cooling solidification speed.

In the step S1, the hollow rod is a hollow straight rod, and one end of the hollow rod contacting the colloidal material is in the shape of an injection needle.

In the step S3, the inside of the molding cavity is in a straight cylinder shape, and a thread groove is arranged at the position, close to the feed inlet, of the inside of the molding cavity.

In the step S2, the hollow rod and the outer tube are slidably connected, and the central axes of the hollow rod and the outer tube coincide with each other.

In the step S4, one end of the outer tube, which is attached to the outer surface of the molding cavity, is in a square sheet shape, and a supporting piece is arranged at the feeding port of the molding cavity after the hollow rod completely exits the inside of the molding cavity, and the supporting piece supports the hollow rod from the inner wall of the rubber material, so that the rubber material is prevented from being stressed and sunken when the switch blade slides downwards to be cut off.

When the knife is slid downwards to cut off, the knife is attached to the outer surface of the forming cavity to slide downwards, so that the end part of the cut colloid material is flush with the surface of the forming cavity.

The outer opening structure of the supporting piece is matched with the inner opening structure of the forming cavity.

And in the step S5, the air cavity is communicated with the heating chamber which is always lower than the molding cavity according to the internal temperature of the molding cavity, the internal temperature of the air cavity is always lower than the internal temperature of the molding cavity by 2-5 ℃, and the air cavity finishes air flow when the internal temperature of the molding cavity is cooled to room temperature.

The blow molding process of the medical instrument shell is applied to the field of production and application of medical handheld flashlight shells.

This medical instrument shell blow molding process, through set up the port position of propping the piece in barrel body inside behind the plastic blow molding when cutting off for barrel body port position is propped up, thereby makes the position of cutting off can not take place to sink, and keeps supporting in the forced air cooling mode of plastic material 2-5 degrees centigrade all the time during the cooling and cools off, takes place damage or shrinkage deformation because of the too big shock chilling of difference in temperature after avoiding the plastic material shaping, thereby guarantee the integrity when the plastic material shaping is barrel shell when improving cooling speed, guarantee product quality when also improving work efficiency.

In summary, the process for blow molding the medical device shell comprises the following operation steps:

s1, melting raw materials: heating and melting the raw materials into a colloidal material, and wrapping the colloidal material to one end of a hollow rod, wherein the other end of the hollow rod is externally connected with a gas injection device;

s2, operation preparation: an outer pipe is sleeved outside the hollow rod, one end of the hollow rod carries a colloid material and extends into the innermost part of the forming cavity, the end part of the outer pipe is in a square shape, and the side surface of the outer pipe is connected with a knife switch in a sliding manner;

s3, blow molding: the air injection equipment blows air in the hollow rod to enable the colloid material to expand like a balloon, but the shape of the colloid material in expansion is limited by the forming cavity, and meanwhile, the hollow rod slowly exits from the inside of the forming cavity to enable the colloid material to expand and form along the inside of the forming cavity;

s4, port disconnection: the outer pipe is attached to the outer surface of the molding cavity while the hollow rod exits from the molding cavity, the side surface of the outer pipe shields a gap between the inner opening of the molding cavity and the outer wall of the hollow rod, and after the hollow rod completely exits from the inside of the molding cavity, the switch blade slides downwards to cut off the connection of the outer colloidal material in the molding cavity;

s5, cooling and forming: the air cavity is wrapped outside the molding cavity and connected with different heating chambers, the heating chambers heat the outside air, the heating temperatures are different and are arranged from high to low, meanwhile, temperature sensors are arranged in the heating chambers and the molding cavity, the heating chambers with the internal temperature always lower than the internal temperature of the molding cavity are controlled to be independently communicated with the air cavity, the air in the air cavity flows to cool the inside of the molding cavity, and the cooling and solidification speed of the added colloid material is increased;

this medical instrument shell blow molding process, through set up the port position of propping the piece in barrel body inside behind the plastic blow molding when cutting off for barrel body port position is propped up, thereby makes the position of cutting off can not take place to sink, and keeps supporting in the forced air cooling mode of plastic material 2-5 degrees centigrade all the time during the cooling and cools off, takes place damage or shrinkage deformation because of the too big shock chilling of difference in temperature after avoiding the plastic material shaping, thereby guarantee the integrity when the plastic material shaping is barrel shell when improving cooling speed, guarantee product quality when also improving work efficiency.