    <SEC-DOCUMENT>0001026655-18-000012-index.html : 20180402
    <SEC-HEADER>0001026655-18-000012.hdr.sgml : 20180402
    <ACCEPTANCE-DATETIME>20180402165735
    ACCESSION NUMBER:		0001026655-18-000012
    CONFORMED SUBMISSION TYPE:	8-K/A
    PUBLIC DOCUMENT COUNT:		7
    CONFORMED PERIOD OF REPORT:	20180116
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20180402
    DATE AS OF CHANGE:		20180402

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CORE MOLDING TECHNOLOGIES INC
    		CENTRAL INDEX KEY:			0001026655
    		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS PRODUCTS, NEC [3089]
    		IRS NUMBER:				311481870
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12505
    		FILM NUMBER:		18729782

    	BUSINESS ADDRESS:
    		STREET 1:		800 MANOR PARK DRIVE
    		STREET 2:		P O BOX 28183
    		CITY:			COLUMBUS
    		STATE:			OH
    		ZIP:			43228
    		BUSINESS PHONE:		8006666960

    	MAIL ADDRESS:
    		STREET 1:		800 MANOR PARK DR
    		STREET 2:		P O BOX 28183
    		CITY:			COLUMBUS
    		STATE:			OH
    		ZIP:			43228

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CORE MATERIALS CORP
    		DATE OF NAME CHANGE:	19961107
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K/A
    <SEQUENCE>1
    <FILENAME>a8-kahpiacquisition.htm
    <DESCRIPTION>8-K/A HPI ACQUISITION
    <TEXT>
    Document 1 - file: a8-kahpiacquisition.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23
    <SEQUENCE>2
    <FILENAME>ex231auditorconsent.htm
    <DESCRIPTION>EXHIBIT 23 AUDITOR CONSENT
    <TEXT>
    Document 2 - file: ex231auditorconsent.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>3
    <FILENAME>ex991hpifinancialstatements.htm
    <DESCRIPTION>EXHIBIT 99.1 HPI FINANCIAL INFORMATION
    <TEXT>
    Document 3 - file: ex991hpifinancialstatements.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>4
    <FILENAME>ex992hpiquarterlyfinancial.htm
    <DESCRIPTION>EXHIBIT 99.2 HPI QUARTERLY FINANCIAL INFORMATION
    <TEXT>
    Document 4 - file: ex992hpiquarterlyfinancial.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.3
    <SEQUENCE>5
    <FILENAME>ex993coremoldingtechnologi.htm
    <DESCRIPTION>EXHIBIT 99.3 CORE MOLDING PROFORMA FINANCIAL INFORMATION
    <TEXT>
    Document 5 - file: ex993coremoldingtechnologi.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>crowesoberman.jpg
    <DESCRIPTION>CROWE SOBERMAN
    <TEXT>
    Document 6 - file: crowesoberman.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>crowesobermana01.jpg
    <DESCRIPTION>CROWE SOBERMAN 1
    <TEXT>
    Document 7 - file: crowesobermana01.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>