Abstract:
A wax liquid temperature control device of a wax injector is disclosed. In this device, a coal oil heat exchanger controls the temperature of the coal oil in a predetermined range. Then, the coal oil is transferred to a wax liquid temperature control cylinder to control the temperature of the wax liquid so that the wax liquid is retained in a proper temperature for being injected to a mold. Therefore, the wax liquid temperature control device of a wax injector may cool the wax liquid in the mold rapidly.

Description:
BACKGROUND OF THE INVENTION 
     1. (a) Field of the Invention 
     The present invention relates to a wax liquid temperature control device of a wax injector, and particularly to a wax liquid temperature control device of a wax injector, wherein coal oil is circularly transferred to control the wax liquid injecting into a mold. Thereby, wax liquid in the mold is cooled rapidly. 
     2. (b) Description of the Prior Art 
     In the prior wax injector, a wax storage tank is used to store melt wax liquid. Thereby, as wax is injected, the melted wax liquid is sucked by the wax injecting cylinder and then the wax liquid is injected to a mold. Then the wax liquid is cooled in the mold and then is taken out so as to form a wax product. However, in this method, the injecting wax liquid must be retained in a proper temperature so that the operation can be successful. The wax liquid in the wax storage tank having a proper high temperature. After the high temperature wax liquid is injected into the mold, a longer cooling time is required for opening the mold. Therefore, the injection work is slow. If the wax liquid in the wax storage tank is low, although the wax can be shaped in the mold, the wax liquid can not be filled in the mold completely. Especially, the holes of the molds are smaller, and the wax liquid can not fill the holes completely so that the products have defects. 
     SUMMARY OF THE INVENTION 
     Accordingly, the primary object of the present invention is to provide a wax liquid temperature control device of a wax injector, wherein a coal oil heat exchanger control the coal oil in a lower temperature condition. Then the low temperature coal oil is transferred to a wax liquid temperature control cylinder to reduce the temperature of the wax liquid. When the temperature of the wax liquid is too low, the coal oil heat exchanger sucks the high temperature coal oil in the wax storage tank to heat the low temperature coal oil so that the temperature of the coal oil increases to a proper temperature and then is transferred to the wax liquid temperature control cylinder for heating. Therefore, the wax liquid is retained in a proper temperature for being injected into a mold. Therefore, the wax liquid will fill the mold completely. 
     Another object of the present invention is to provide a wax liquid temperature control device of a wax injector, wherein the coal oil heat exchanger has a water tube which is connected to a water storage tank. Thereby, cooling water may be sucked for cooling coal oil. Thereby, the coal oil can be transferred to a wax liquid temperature control cylinder for reducing the temperature of the wax liquid. 
     A further object of the present invention is to provide a wax liquid temperature control device of a wax injector, wherein if the temperature of the coal oil is too high, in the present invention, the temperature sensor serves to measure the temperature of the coal oil for controlling the electromagnetic valve to switch the pump. Thereby, cooled water is transferred to the coal oil heat exchanger for reducing the temperature of the coal oil. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a schematic view showing that the present invention is utilized to an wax injector. 
     FIG. 2 is a schematic view showing the pipelines and flows of the present invention. 
     FIG. 3 is a schematic view showing the wax liquid temperature control cylinder of the present invention. 
     FIG. 4 is a schematic view showing that the wax liquid temperature control cylinder of the present invention is prolonged. 
     FIG. 5 is a schematic view showing the cooling and heating process of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIGS. 1 and 2, the wax injecting device of the present invention is illustrated. The wax injecting device includes a wax liquid temperature control cylinder  1 , a coal oil heat exchanger  2 , a wax storage tank  3 , a wax injecting cylinder  4 , and a water storage tank  5 . The coal oil (or other liquid) is used as a medium for heat exchanging. 
     With reference to FIGS. 3 and 4, the wax liquid temperature control cylinder  1  is a device for sucking wax liquid from a wax storage tank  3  for providing the wax injecting cylinder  4 . The interior of the wax liquid temperature control cylinder  1  is installed with a helical flow channel for providing wax liquid for cooling the coal oil or heating. The wax liquid temperature control cylinder  1  includes an outer cylinder body  11 , an inner cylinder body  12 , and a linear moving means  13 . 
     The outer cylinder body  11  has an outer barrel body  111 . The interior thereof is installed with an inner barrel body  112 . The periphery of the inner barrel cylinder  112  is enclosed by a helical ring  113  so that a helical flow channel A is formed between the two barrel bodies. The lateral wall of the outer barrel body  111  is formed with two coal oil opening  114  which is communicated with the two ends of the flow channel A. The rear end thereof has a sealing block  115  so that the rear ends of the two barrel bodies are sealed. The front ends of the two barrel bodies are installed with an annular seat  116 . Two sides of the seat  116  are installed with orifices  117  which are communicated with the inner barrel bodies. 
     The inner barrel body  12  has an outer barrel body  121 , an inner barrel body  122 , a helical ring  123  and a sealing block  125 . It has an assembly the same as the outer cylinder body, namely, it has a flow channel B. The end portion of the sealing block  125  is installed with two coal oil openings  124 , which is communicated with the flow path B. Thereby, the inner cylinder body  12  passes into the annular seat  116  of the outer cylinder body  11  and is telescopic. A receiving chamber C is formed between the two cylinders, which is communicated with the orifice  117  of the annular seat  116 . Two coal oil openings  114  are formed, one of the openings has a tube  126  which is communicated with one of the coal oil opening  124 . 
     The linear moving means  13  has a driving device  131  which may move linearly. A spindle  132  passes through the driving device  131 . Thereby, the spindle  132  may move linearly and telescopically. Thereby, the driving device  131  is firmly secured to the end portion of the outer cylinder body  11  (or inversely is installed to an end portion of the inner cylinder body  12 ) so that the spindle  132  is firmly secured to the rear end of the inner cylinder body  12  (or the rear end of the outer cylinder body). The linear moving means  13  may push and pull the cylinder bodies  11  and  12  telescopically. Thereby, the receiving chamber C absorbs wax liquid from the two orifices  117  and then extrudes the wax liquid. Then the wax liquid is transferred to the wax injecting cylinder  4  for being injected. 
     With reference to FIG. 2, the coal oil heat exchanger  2  is a prior heat exchanger for reducing or increasing the temperature of the coal oil. The exchanger  2  is installed with an oil tube  21  which is communicated with the coal oil openings  114 ,  124  of the wax liquid temperature control cylinder  1  so as to form as a cyclic flow path. A temperature sensor  24  is installed out of the oil tube  21  at an outlet of the wax liquid temperature control cylinder  1 . The coal oil heat exchanger  2  is further installed with a water tube  22  which is communicated with the water storage tank  5 . An electromagnetic valve  26  is installed. Thereby, the pump  6  and the water tube  22  can suck cooling water for cooling the coal oil in the water tube  26 . The coal oil heat exchanger  2  is formed with a coal oil tube  23  which is communicated with the wax storage tank  3 . Therefore, the high temperature coal oil in the wax storage tank  3  can be selectively sucked for heating the wax liquid temperature control cylinder  1 . 
     In the wax storage tank  3 , high temperature coal oil serves to heat the wax so as to be formed with high temperature melt wax liquid. The wax liquid is filled in the wax injecting cylinder  4  for storage. The wax storage tank  3  is formed with a wax liquid tube  31  which is communicated with the orifices  117  of the wax liquid temperature control cylinder  1 . Thus, as the wax liquid temperature control cylinder  1  telescopically moves, the wax liquid in the wax storage tank  3  can be sucked. 
     The wax injecting cylinder  4  is a prior injecting device for storing wax in a proper temperature before wax is injected into a mold. A wax liquid tube  41  is communicated with the orifices  117  of the wax liquid temperature control cylinder  1 . Therefore, the wax liquid sucked by the wax liquid temperature control cylinder  1  may be transferred to the wax injecting cylinder  4  by the wax liquid tube. The wax injecting cylinder  4  is a prior object. Therefore, the details will not be described herein. 
     The water storage tank  5  is installed at an interior or an exterior of the wax injecting device. Cooling water is stored in the water storage tank  5 . By the circulation flow in the water tube  22  and the coal oil heat exchanger  2 , the high temperature coal oil can be cooled. 
     The oil tube  21  of the coal oil heat exchanger  2  is connected to the wax liquid temperature control cylinder  1 . The coal oil openings  114 ,  124  of the wax liquid temperature control cylinder  1  are formed as flow paths. The water tube  22  is communicated with the water storage tank  5 . The wax liquid tube  23  is communicated with the wax storage tank  3  (referring to FIGS.  2  and  5 ). In the present invention, when the wax liquid temperature control cylinder  1  is reduced by the inner linear moving means  13 , the high temperature melt wax liquid in the wax storage tank  3  can be absorbed through the wax liquid tube  31  to enter into the receiving chamber C. Then, coal oil is transferred to the helical flow path A of the wax liquid temperature control cylinder  1  from the coal oil heat exchanger  2 . The wax liquid is cooled by the cyclical flowing of the coal oil. The tube  126  between the inner cylinder body  12  and the outer cylinder body  11  cause that the coal oil flows into the flow path B to further cool the wax liquid. The heat of the wax liquid will be exhausted by the flowing the coal oil. If so, the wax liquid in the wax liquid temperature control cylinder  1  has a proper temperature for shaping injecting wax. 
     If the temperature of the coal oil is too high, in the present invention, the temperature sensor  24  serves to measure the temperature of the coal oil for controlling the electromagnetic valve  26  to switch the pump  6 . Thereby, cooled water is transferred to the coal oil heat exchanger  2  for reducing the temperature of the coal oil. Therefore, the low temperature coal oil is utilized to cool the wax liquid in the wax liquid temperature control cylinder  1 . If the temperature of the wax liquid in the wax liquid temperature control cylinder  1  is too low, the high temperature coal oil in the wax storage tank  3  is sucked by the high temperature coal oil tube  23 , electromagnetic valve  25  and the pump  7  to flow into the wax liquid temperature control cylinder  1 . The wax liquid is heated by the high temperature coal oil so as to have a proper temperature for being injected. If so, the wax having a proper temperature is injected to the mold from the wax injecting cylinder  4  by the wax liquid temperature control cylinder  1 . Therefore, the cooling time can not be too long, and the mold can be filled with wax liquid fully. As a result, the wax can be cooled and shaped rapidly. 
     Although the present invention has been described with reference to the preferred embodiments, it will be understood that the invention is not limited to the details described thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.