KR200270248Y1 - An Injection Metal Mold Structure Of Rubber For Manufacturing Of Writing Tool - Google Patents

Abstract

The present invention relates to a rubber injection mold structure for writing instruments. The start urethane rubber 118 and the three-stage ring 121 are mounted on a mold to prevent about 60% of the length of the product. 126) may be molded to allow continuous production without damage to the appearance. To this end, liquid rubber is injected through the heating nozzle 114 of the upper fixing plate 101 into the molding space between the slide cores 115 on both sides of the core pin 119, and the writing tool rubber 126 is injection molded. In order to release the injection-molded writing instrument rubber 126 from the mold, the core pin bushing plate 105 coupled with the slide mounting plate 104 is started by the three-stage ring 121 and the start urethane rubber 118, The slide mounting plate 104 is lifted and spaced apart from the core pin plate 106 by a guide pin 109 coupled to the cooling pipe mounting plate 107 above the fixing plate 108. The slide pressing plate 103 is moved up and down together with the upper fixing plate 101 while the lifting bolt 110 and the sprue runner 128 are moved from the slide core 115 by the lifting bolt 110. It characterized in that the mold is configured to be separated operation.

Description

Rubber injection molding structure for writing instruments {An Injection Metal Mold Structure Of Rubber For Manufacturing Of Writing Tool}

The present invention relates to a rubber injection mold structure for writing instruments used in combination with the handle portion of the writing instrument, and more specifically, by mounting a start urethane rubber and a three-stage ring on the mold to remove about 60% of the length of the product, the shape of the mold As described above, the writing instrument rubber is precisely and neatly molded, and thus, it relates to a writing instrument rubber injection mold structure capable of continuously producing a product without damaging its appearance.

In general, there are many methods for molding articles of the required shape, but injection molding for making articles of the required shape using resins is widely used. The most important thing in such injection molding is a mold apparatus having an internal space of a shape to be made. to be.

On the other hand, the writing instrument which has the pen nib to interlock the pen nib by the pressing method to have a relationship of use, and uses the injection molding method by the mold as a structure that accommodates the nib at the end of the rubber, the guide opening and closing by the slide guide As the forming plate is positioned between the movable mold and the fixed mold, the core pin for forming the injection space of the injection molding is internally formed.

Since the injection mold for writing instruments is injected with resin through the injection nozzle while the mold is closed, the movable mold is developed and the core pin is retracted in conjunction with the movable mold, so that the continuous injection-molded product is separated from the molding mold in which the injection is made. Will be produced.

However, until now, the injection mold for writing instruments has often been unable to be separated from the mold due to the core pin bushing when the core pin is retracted in conjunction with the development of the mold. This results in the hassle of separating the injection molding, and when the operator does not recognize that the injection molding has not been separated, the mold is changed to the closed position, and the unreleased injection molding is broken inside the mold and continuous work is performed. There was a problem that the work efficiency is lowered as a result without being supported.

In addition, since the injection mold for writing instruments for molding a product has a structure in which a gate for injecting the injection into the molding part has a structure flowing from the upper outer surface of the molding part, the injection molding into the cap molding part for molding the product. In the case of injection and solidification, the injection injected into the molding part is solidified as it is connected with the gate, and when the molded writing rubber is separated into the mold, the injection connection part forming the solidification state is exposed to the outside, and this part is not cut cleanly. There was a problem in that the cut part remains sharp and the writing feeling at the time of use is dropped.

On the other hand, since the writing instrument rubber coupled to the handle portion so that the gripped portion can be smoothly processed when using the writing instrument is different from the ordinary injection material resin, it is very difficult to release the product from the mold by molding and urethane rubber and There is a problem that continuous operation cannot be made unless the product is separated from the mold by dropping about 60% of the product length by mounting the three-loop cap on the mold.

Therefore, the present invention was developed in view of the above circumstances, and the start urethane rubber and the three-stage ring are mounted on the mold, and about 60% of the product length is forcibly removed so that the writing instrument rubber is precisely and neatly molded in the shape of the mold so that the appearance is not damaged. It is an object of the present invention to provide a rubber injection mold structure for writing instruments that can continuously produce the product and structurally reduce product defects.

1 and 2 is a combined state in which the mold of the writing implement rubber according to the present invention is assembled.

3 is a core pin bushing plate combined with a slide mounting plate to be firstly released from the mold by the writing instrument rubber molded according to the present invention is started by a three-stage ring and a start urethane rubber to be lifted about 20-25mm from the core pin plate below Even spaced operating conditions.

4 is a tension bolt while the slide mounting plate is moved up and down together with the core pin bushing plate through the guide pin coupled to the cooling pipe mounting plate on the top of the fixed plate to be separated from the mold secondary to the writing instrument rubber molded according to the present invention An operation state in which the slide pressing plate is moved up and down together with the upper fixing plate so that the writing instrument rubber and the sprue runner above the core pin are separated from the slide core.

Explanation of symbols on the main parts of the drawings

101: fixing plate 102: spacer block

103: slide pressing plate 104: slide mounting plate

105: core pin bushing plate 106: core pin plate

107: cooling pipe mounting plate 108: fixed plate

109: guide pin 110: tension bolt

111: return pin 112: eject plate

113: locate ring 114: heating nozzle

115: slide core 116: slide core frame

117: stop bolt 118: start urethane rubber

119: core pin 120: core pin bushing

121: three-stage ring 122: three-stage ring cap

123: heater wire 124: angle angler pin

125: slide rail 126: writing instrument rubber

127: runner mill pin 128: sprue runner

The writing instrument rubber injection mold structure of the present invention for achieving the above object, the liquid rubber is injected through the heating nozzle of the upper fixing plate into the molding space between the slide cores on both sides of the core pin and the writing instrument rubber is injected. The core pin bushing plate combined with the slide mounting plate to be molded, and the injection molded pendulum rubber is released from the mold is started by the three-stage ring cap and the start urethane rubber to be lifted and spaced apart from the core pin plate at the bottom, and As the slide mounting plate moves up and down together with the core pin bushing plate through the guide pin coupled to the cooling pipe mounting plate, the slide pressing plate moves up and down together with the upper fixing plate through the tension bolt, so that the writing instrument rubber and sprue runner are separated from the slide core. It is characterized in that the mold is configured to operate.

Hereinafter, preferred embodiments of the rubber injection mold structure for writing instruments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 illustrate a coupling state in which the mold of the writing instrument rubber 126 according to the present invention is assembled, and FIG. 3 shows that the writing instrument rubber 126 injection molded according to the present invention is primarily released from the mold. The core pin bushing plate 105 coupled with the slide mounting plate 104 is started by the three-stage ring 121 and the start urethane rubber 118 to be lifted and spaced apart from the core pin plate 106 below by 20-25 mm. The operating state is shown.

And Figure 4 slides through the guide pin 109 coupled to the cooling pipe mounting plate 107 above the fixed plate 108 in order to separate the writing instrument rubber 126 secondary molding from the mold according to the present invention As the mounting plate 104 is moved up and down together with the core pin bushing plate 105, the slide pressing plate 103 is moved up and down together with the upper fixing plate 101 through the tension bolt 110 to move up and down the core pins 119. The writing machine rubber 126 and the sprue runner 128 are shown in the operating state is separated from the slide core 115.

Writing instrument rubber 126 is injection molded by the present invention as shown in the drawing is about 60% of the product length by the start urethane rubber 118 and the three-stage ring cap (122) is first released by deduction, first core pin Liquid rubber is injected through the heating nozzle 114 of the upper fixing plate 101 into the forming space between the slide cores 115 on both sides of the center 119, and the writing instrument rubber 126 is injection molded, and the upper fixing plate 101, the spacer block 102 and the eject plate 112 are positioned between the slide pressing plate 103 and the slide pressing plate 103 is a slide core frame 116 via the tension bolt 11. The slide mounting plate 104 is installed.

In addition, as the runner mill plate 127 from the heating nozzle 114 is installed at the center of the slide pressing plate, the locating ring 113 is coupled to the heating nozzle 114, and the heating nozzle has a rubber injected therein. The heater wire 123 is, of course, configured to be injected as a liquid state into the molding space formed between the slide core 115 and the core pin 119.

In addition, the core pin bushing plate 105 coupled with the slide mounting plate 104 to be released from the slide core frame 116 and the core pin 119 forming the molding space of the injection-molded writing instrument rubber 126 is 1 It is started by the three-stage ring 122 and the start urethane rubber 118 to be spaced apart upwards and downwards from the bottom core pin plate 106, the three-stage ring cap 121 is a gore pin by the three-stage ring cap 122 The slide mounting plate 104 coupled with the bushing plate 105 is separated and spaced apart from the core pin plate 106 coupled with the coolant pipe mounting plate 107 of the fixed plate 108, and the writing instrument rubber 126 is separated from the core pin 119. ) Can be separated.

That is, the slide mounting plate 104 is moved up and down together with the core pin bushing plate 105 via the guide pin 109 coupled to the cooling pipe mounting plate 107 on the fixing plate 108, the tension bolt 110 The slide pressing plate 103 is moved up and down together with the upper fixing plate 101 through the core, which is the core pin in the core pin bushing 120 coupled to the slide mounting plate 104 and the core pin bushing plate 105. The writing instrument runner 126 may be separated and dropped from the core pin 119 of the slide mounting plate 104 as the 119 is relatively retracted, and at the same time, the runner mill plate of the slide pressing plate 103 located at an upper portion thereof. Since the 127 is also spaced apart, the sprue runner 128 is also dropped.

In addition, reference numeral 117 which is not described is a stop bolt that allows the slide mounting plate 104 to be moved up and down together from the cooling pipe mounting plate 107 through the guide pin 109. Reference numerals 124 and 125 denote angle angle pins inclined to the slide pressing plate 103 and slide rails to which the angle angle pins 124 are guided.

As described above, the rubber injection mold structure for writing instruments according to the present invention is made by urethane rubber and three-rings mounted on the mold, and the writing instrument rubber is precisely and neatly molded according to the shape of the mold by subtracting about 60% of the product length. It is possible to produce products continuously without deteriorating its appearance, and it is also possible to structurally reduce product defects.

In addition, it is expected to improve both functionality and convenience by replacing only the slide core without replacing the entire injection mold when the partial composition of the slide core forming the injection mold is damaged. Complex and precise mold shapes that were difficult to expect, as well as the effect of enabling continuous molding operations are provided.

Claims (1)

Liquid rubber is injected through the heating nozzle 114 of the upper fixing plate 101 into the molding space between the slide cores 115 on both sides of the core pin 119, and the writing instrument rubber 126 is injection molded. The core pin bushing plate 105 coupled with the slide mounting plate 104 is started by the three-stage ring 121 and the start urethane rubber 118 so that the molded writing implement rubber 126 is released from the mold. The slide mounting plate 104 and the core pin bushing plate 105 are lifted and spaced apart upward from the 106, and guide pins 109 coupled to the cooling pipe mounting plate 107 above the fixing plate 108. The slide pressing plate 103 is moved up and down together with the upper fixing plate 101 while the lifting bolt 110 is moved up and down with the writing bolt rubber 126 and the sprue runner 128 separated from the slide core 115. Rubber injection mold for writing instruments, characterized in that the mold is configured article.